linux/drivers/usb/host/oxu210hp-hcd.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2008 Rodolfo Giometti <giometti@linux.it>
* Copyright (c) 2008 Eurotech S.p.A. <info@eurtech.it>
*
* This code is *strongly* based on EHCI-HCD code by David Brownell since
* the chip is a quasi-EHCI compatible.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/dmapool.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/unaligned.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#define DRIVER_VERSION "0.0.50"
usb: host: oxu210hp-hcd: squash oxu210hp.h into oxu210hp-hcd.c The header, oxu210hp.h is only included from oxu210hp-hcd.c so squash it. When I moved the code, I also fixed the following warnings from scripts/checkpatch.pl: drivers/usb/host/oxu210hp-hcd.c:117: warning: __packed is preferred over __attribute__((packed)) drivers/usb/host/oxu210hp-hcd.c:196: warning: __packed is preferred over __attribute__((packed)) drivers/usb/host/oxu210hp-hcd.c:221: warning: __packed is preferred over __attribute__((packed)) drivers/usb/host/oxu210hp-hcd.c:266: warning: __aligned(size) is preferred over __attribute__((aligned(size))) drivers/usb/host/oxu210hp-hcd.c:336: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:354: warning: __aligned(size) is preferred over __attribute__((aligned(size))) drivers/usb/host/oxu210hp-hcd.c:385: warning: __aligned(size) is preferred over __attribute__((aligned(size))) drivers/usb/host/oxu210hp-hcd.c:393: warning: __aligned(size) is preferred over __attribute__((aligned(size))) drivers/usb/host/oxu210hp-hcd.c:429: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:432: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:436: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:451: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:461: warning: Prefer 'unsigned int' to bare use of 'unsigned' drivers/usb/host/oxu210hp-hcd.c:467: warning: please, no space before tabs Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Link: https://lore.kernel.org/r/20190721144909.5295-2-yamada.masahiro@socionext.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-21 22:49:09 +08:00
#define OXU_DEVICEID 0x00
#define OXU_REV_MASK 0xffff0000
#define OXU_REV_SHIFT 16
#define OXU_REV_2100 0x2100
#define OXU_BO_SHIFT 8
#define OXU_BO_MASK (0x3 << OXU_BO_SHIFT)
#define OXU_MAJ_REV_SHIFT 4
#define OXU_MAJ_REV_MASK (0xf << OXU_MAJ_REV_SHIFT)
#define OXU_MIN_REV_SHIFT 0
#define OXU_MIN_REV_MASK (0xf << OXU_MIN_REV_SHIFT)
#define OXU_HOSTIFCONFIG 0x04
#define OXU_SOFTRESET 0x08
#define OXU_SRESET (1 << 0)
#define OXU_PIOBURSTREADCTRL 0x0C
#define OXU_CHIPIRQSTATUS 0x10
#define OXU_CHIPIRQEN_SET 0x14
#define OXU_CHIPIRQEN_CLR 0x18
#define OXU_USBSPHLPWUI 0x00000080
#define OXU_USBOTGLPWUI 0x00000040
#define OXU_USBSPHI 0x00000002
#define OXU_USBOTGI 0x00000001
#define OXU_CLKCTRL_SET 0x1C
#define OXU_SYSCLKEN 0x00000008
#define OXU_USBSPHCLKEN 0x00000002
#define OXU_USBOTGCLKEN 0x00000001
#define OXU_ASO 0x68
#define OXU_SPHPOEN 0x00000100
#define OXU_OVRCCURPUPDEN 0x00000800
#define OXU_ASO_OP (1 << 10)
#define OXU_COMPARATOR 0x000004000
#define OXU_USBMODE 0x1A8
#define OXU_VBPS 0x00000020
#define OXU_ES_LITTLE 0x00000000
#define OXU_CM_HOST_ONLY 0x00000003
/*
* Proper EHCI structs & defines
*/
/* Magic numbers that can affect system performance */
#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
#define EHCI_TUNE_RL_TT 0
#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
#define EHCI_TUNE_MULT_TT 1
#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
struct oxu_hcd;
/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
/* Section 2.2 Host Controller Capability Registers */
struct ehci_caps {
/* these fields are specified as 8 and 16 bit registers,
* but some hosts can't perform 8 or 16 bit PCI accesses.
*/
u32 hc_capbase;
#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
u32 hcs_params; /* HCSPARAMS - offset 0x4 */
#define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */
#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
#define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */
#define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */
#define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */
#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
u32 hcc_params; /* HCCPARAMS - offset 0x8 */
#define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */
#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */
#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/
#define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */
u8 portroute[8]; /* nibbles for routing - offset 0xC */
} __packed;
/* Section 2.3 Host Controller Operational Registers */
struct ehci_regs {
/* USBCMD: offset 0x00 */
u32 command;
/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
#define CMD_PARK (1<<11) /* enable "park" on async qh */
#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */
#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */
#define CMD_ASE (1<<5) /* async schedule enable */
#define CMD_PSE (1<<4) /* periodic schedule enable */
/* 3:2 is periodic frame list size */
#define CMD_RESET (1<<1) /* reset HC not bus */
#define CMD_RUN (1<<0) /* start/stop HC */
/* USBSTS: offset 0x04 */
u32 status;
#define STS_ASS (1<<15) /* Async Schedule Status */
#define STS_PSS (1<<14) /* Periodic Schedule Status */
#define STS_RECL (1<<13) /* Reclamation */
#define STS_HALT (1<<12) /* Not running (any reason) */
/* some bits reserved */
/* these STS_* flags are also intr_enable bits (USBINTR) */
#define STS_IAA (1<<5) /* Interrupted on async advance */
#define STS_FATAL (1<<4) /* such as some PCI access errors */
#define STS_FLR (1<<3) /* frame list rolled over */
#define STS_PCD (1<<2) /* port change detect */
#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */
#define STS_INT (1<<0) /* "normal" completion (short, ...) */
#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
/* USBINTR: offset 0x08 */
u32 intr_enable;
/* FRINDEX: offset 0x0C */
u32 frame_index; /* current microframe number */
/* CTRLDSSEGMENT: offset 0x10 */
u32 segment; /* address bits 63:32 if needed */
/* PERIODICLISTBASE: offset 0x14 */
u32 frame_list; /* points to periodic list */
/* ASYNCLISTADDR: offset 0x18 */
u32 async_next; /* address of next async queue head */
u32 reserved[9];
/* CONFIGFLAG: offset 0x40 */
u32 configured_flag;
#define FLAG_CF (1<<0) /* true: we'll support "high speed" */
/* PORTSC: offset 0x44 */
u32 port_status[0]; /* up to N_PORTS */
/* 31:23 reserved */
#define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */
#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */
#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */
/* 19:16 for port testing */
#define PORT_LED_OFF (0<<14)
#define PORT_LED_AMBER (1<<14)
#define PORT_LED_GREEN (2<<14)
#define PORT_LED_MASK (3<<14)
#define PORT_OWNER (1<<13) /* true: companion hc owns this port */
#define PORT_POWER (1<<12) /* true: has power (see PPC) */
#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10)) /* USB 1.1 device */
/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
/* 9 reserved */
#define PORT_RESET (1<<8) /* reset port */
#define PORT_SUSPEND (1<<7) /* suspend port */
#define PORT_RESUME (1<<6) /* resume it */
#define PORT_OCC (1<<5) /* over current change */
#define PORT_OC (1<<4) /* over current active */
#define PORT_PEC (1<<3) /* port enable change */
#define PORT_PE (1<<2) /* port enable */
#define PORT_CSC (1<<1) /* connect status change */
#define PORT_CONNECT (1<<0) /* device connected */
#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
} __packed;
/* Appendix C, Debug port ... intended for use with special "debug devices"
* that can help if there's no serial console. (nonstandard enumeration.)
*/
struct ehci_dbg_port {
u32 control;
#define DBGP_OWNER (1<<30)
#define DBGP_ENABLED (1<<28)
#define DBGP_DONE (1<<16)
#define DBGP_INUSE (1<<10)
#define DBGP_ERRCODE(x) (((x)>>7)&0x07)
# define DBGP_ERR_BAD 1
# define DBGP_ERR_SIGNAL 2
#define DBGP_ERROR (1<<6)
#define DBGP_GO (1<<5)
#define DBGP_OUT (1<<4)
#define DBGP_LEN(x) (((x)>>0)&0x0f)
u32 pids;
#define DBGP_PID_GET(x) (((x)>>16)&0xff)
#define DBGP_PID_SET(data, tok) (((data)<<8)|(tok))
u32 data03;
u32 data47;
u32 address;
#define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep))
} __packed;
#define QTD_NEXT(dma) cpu_to_le32((u32)dma)
/*
* EHCI Specification 0.95 Section 3.5
* QTD: describe data transfer components (buffer, direction, ...)
* See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
*
* These are associated only with "QH" (Queue Head) structures,
* used with control, bulk, and interrupt transfers.
*/
struct ehci_qtd {
/* first part defined by EHCI spec */
__le32 hw_next; /* see EHCI 3.5.1 */
__le32 hw_alt_next; /* see EHCI 3.5.2 */
__le32 hw_token; /* see EHCI 3.5.3 */
#define QTD_TOGGLE (1 << 31) /* data toggle */
#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
#define QTD_IOC (1 << 15) /* interrupt on complete */
#define QTD_CERR(tok) (((tok)>>10) & 0x3)
#define QTD_PID(tok) (((tok)>>8) & 0x3)
#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
#define QTD_STS_HALT (1 << 6) /* halted on error */
#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
#define QTD_STS_XACT (1 << 3) /* device gave illegal response */
#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
#define QTD_STS_STS (1 << 1) /* split transaction state */
#define QTD_STS_PING (1 << 0) /* issue PING? */
__le32 hw_buf[5]; /* see EHCI 3.5.4 */
__le32 hw_buf_hi[5]; /* Appendix B */
/* the rest is HCD-private */
dma_addr_t qtd_dma; /* qtd address */
struct list_head qtd_list; /* sw qtd list */
struct urb *urb; /* qtd's urb */
size_t length; /* length of buffer */
u32 qtd_buffer_len;
void *buffer;
dma_addr_t buffer_dma;
void *transfer_buffer;
void *transfer_dma;
} __aligned(32);
/* mask NakCnt+T in qh->hw_alt_next */
#define QTD_MASK cpu_to_le32 (~0x1f)
#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
/* Type tag from {qh, itd, sitd, fstn}->hw_next */
#define Q_NEXT_TYPE(dma) ((dma) & cpu_to_le32 (3 << 1))
/* values for that type tag */
#define Q_TYPE_QH cpu_to_le32 (1 << 1)
/* next async queue entry, or pointer to interrupt/periodic QH */
#define QH_NEXT(dma) (cpu_to_le32(((u32)dma)&~0x01f)|Q_TYPE_QH)
/* for periodic/async schedules and qtd lists, mark end of list */
#define EHCI_LIST_END cpu_to_le32(1) /* "null pointer" to hw */
/*
* Entries in periodic shadow table are pointers to one of four kinds
* of data structure. That's dictated by the hardware; a type tag is
* encoded in the low bits of the hardware's periodic schedule. Use
* Q_NEXT_TYPE to get the tag.
*
* For entries in the async schedule, the type tag always says "qh".
*/
union ehci_shadow {
struct ehci_qh *qh; /* Q_TYPE_QH */
__le32 *hw_next; /* (all types) */
void *ptr;
};
/*
* EHCI Specification 0.95 Section 3.6
* QH: describes control/bulk/interrupt endpoints
* See Fig 3-7 "Queue Head Structure Layout".
*
* These appear in both the async and (for interrupt) periodic schedules.
*/
struct ehci_qh {
/* first part defined by EHCI spec */
__le32 hw_next; /* see EHCI 3.6.1 */
__le32 hw_info1; /* see EHCI 3.6.2 */
#define QH_HEAD 0x00008000
__le32 hw_info2; /* see EHCI 3.6.2 */
#define QH_SMASK 0x000000ff
#define QH_CMASK 0x0000ff00
#define QH_HUBADDR 0x007f0000
#define QH_HUBPORT 0x3f800000
#define QH_MULT 0xc0000000
__le32 hw_current; /* qtd list - see EHCI 3.6.4 */
/* qtd overlay (hardware parts of a struct ehci_qtd) */
__le32 hw_qtd_next;
__le32 hw_alt_next;
__le32 hw_token;
__le32 hw_buf[5];
__le32 hw_buf_hi[5];
/* the rest is HCD-private */
dma_addr_t qh_dma; /* address of qh */
union ehci_shadow qh_next; /* ptr to qh; or periodic */
struct list_head qtd_list; /* sw qtd list */
struct ehci_qtd *dummy;
struct ehci_qh *reclaim; /* next to reclaim */
struct oxu_hcd *oxu;
struct kref kref;
unsigned int stamp;
u8 qh_state;
#define QH_STATE_LINKED 1 /* HC sees this */
#define QH_STATE_UNLINK 2 /* HC may still see this */
#define QH_STATE_IDLE 3 /* HC doesn't see this */
#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on reclaim q */
#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
/* periodic schedule info */
u8 usecs; /* intr bandwidth */
u8 gap_uf; /* uframes split/csplit gap */
u8 c_usecs; /* ... split completion bw */
u16 tt_usecs; /* tt downstream bandwidth */
unsigned short period; /* polling interval */
unsigned short start; /* where polling starts */
#define NO_FRAME ((unsigned short)~0) /* pick new start */
struct usb_device *dev; /* access to TT */
} __aligned(32);
/*
* Proper OXU210HP structs
*/
#define OXU_OTG_CORE_OFFSET 0x00400
#define OXU_OTG_CAP_OFFSET (OXU_OTG_CORE_OFFSET + 0x100)
#define OXU_SPH_CORE_OFFSET 0x00800
#define OXU_SPH_CAP_OFFSET (OXU_SPH_CORE_OFFSET + 0x100)
#define OXU_OTG_MEM 0xE000
#define OXU_SPH_MEM 0x16000
/* Only how many elements & element structure are specifies here. */
/* 2 host controllers are enabled - total size <= 28 kbytes */
#define DEFAULT_I_TDPS 1024
#define QHEAD_NUM 16
#define QTD_NUM 32
#define SITD_NUM 8
#define MURB_NUM 8
#define BUFFER_NUM 8
#define BUFFER_SIZE 512
struct oxu_info {
struct usb_hcd *hcd[2];
};
struct oxu_buf {
u8 buffer[BUFFER_SIZE];
} __aligned(BUFFER_SIZE);
struct oxu_onchip_mem {
struct oxu_buf db_pool[BUFFER_NUM];
u32 frame_list[DEFAULT_I_TDPS];
struct ehci_qh qh_pool[QHEAD_NUM];
struct ehci_qtd qtd_pool[QTD_NUM];
} __aligned(4 << 10);
#define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
struct oxu_murb {
struct urb urb;
struct urb *main;
u8 last;
};
struct oxu_hcd { /* one per controller */
unsigned int is_otg:1;
u8 qh_used[QHEAD_NUM];
u8 qtd_used[QTD_NUM];
u8 db_used[BUFFER_NUM];
u8 murb_used[MURB_NUM];
struct oxu_onchip_mem __iomem *mem;
spinlock_t mem_lock;
struct timer_list urb_timer;
struct ehci_caps __iomem *caps;
struct ehci_regs __iomem *regs;
u32 hcs_params; /* cached register copy */
spinlock_t lock;
/* async schedule support */
struct ehci_qh *async;
struct ehci_qh *reclaim;
unsigned int reclaim_ready:1;
unsigned int scanning:1;
/* periodic schedule support */
unsigned int periodic_size;
__le32 *periodic; /* hw periodic table */
dma_addr_t periodic_dma;
unsigned int i_thresh; /* uframes HC might cache */
union ehci_shadow *pshadow; /* mirror hw periodic table */
int next_uframe; /* scan periodic, start here */
unsigned int periodic_sched; /* periodic activity count */
/* per root hub port */
unsigned long reset_done[EHCI_MAX_ROOT_PORTS];
/* bit vectors (one bit per port) */
unsigned long bus_suspended; /* which ports were
* already suspended at the
* start of a bus suspend
*/
unsigned long companion_ports;/* which ports are dedicated
* to the companion controller
*/
struct timer_list watchdog;
unsigned long actions;
unsigned int stamp;
unsigned long next_statechange;
u32 command;
/* SILICON QUIRKS */
struct list_head urb_list; /* this is the head to urb
* queue that didn't get enough
* resources
*/
struct oxu_murb *murb_pool; /* murb per split big urb */
unsigned int urb_len;
u8 sbrn; /* packed release number */
};
#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */
#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */
enum ehci_timer_action {
TIMER_IO_WATCHDOG,
TIMER_IAA_WATCHDOG,
TIMER_ASYNC_SHRINK,
TIMER_ASYNC_OFF,
};
/*
* Main defines
*/
#define oxu_dbg(oxu, fmt, args...) \
dev_dbg(oxu_to_hcd(oxu)->self.controller , fmt , ## args)
#define oxu_err(oxu, fmt, args...) \
dev_err(oxu_to_hcd(oxu)->self.controller , fmt , ## args)
#define oxu_info(oxu, fmt, args...) \
dev_info(oxu_to_hcd(oxu)->self.controller , fmt , ## args)
#ifdef CONFIG_DYNAMIC_DEBUG
#define DEBUG
#endif
static inline struct usb_hcd *oxu_to_hcd(struct oxu_hcd *oxu)
{
return container_of((void *) oxu, struct usb_hcd, hcd_priv);
}
static inline struct oxu_hcd *hcd_to_oxu(struct usb_hcd *hcd)
{
return (struct oxu_hcd *) (hcd->hcd_priv);
}
/*
* Debug stuff
*/
#undef OXU_URB_TRACE
#undef OXU_VERBOSE_DEBUG
#ifdef OXU_VERBOSE_DEBUG
#define oxu_vdbg oxu_dbg
#else
#define oxu_vdbg(oxu, fmt, args...) /* Nop */
#endif
#ifdef DEBUG
static int __attribute__((__unused__))
dbg_status_buf(char *buf, unsigned len, const char *label, u32 status)
{
return scnprintf(buf, len, "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
label, label[0] ? " " : "", status,
(status & STS_ASS) ? " Async" : "",
(status & STS_PSS) ? " Periodic" : "",
(status & STS_RECL) ? " Recl" : "",
(status & STS_HALT) ? " Halt" : "",
(status & STS_IAA) ? " IAA" : "",
(status & STS_FATAL) ? " FATAL" : "",
(status & STS_FLR) ? " FLR" : "",
(status & STS_PCD) ? " PCD" : "",
(status & STS_ERR) ? " ERR" : "",
(status & STS_INT) ? " INT" : ""
);
}
static int __attribute__((__unused__))
dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable)
{
return scnprintf(buf, len, "%s%sintrenable %02x%s%s%s%s%s%s",
label, label[0] ? " " : "", enable,
(enable & STS_IAA) ? " IAA" : "",
(enable & STS_FATAL) ? " FATAL" : "",
(enable & STS_FLR) ? " FLR" : "",
(enable & STS_PCD) ? " PCD" : "",
(enable & STS_ERR) ? " ERR" : "",
(enable & STS_INT) ? " INT" : ""
);
}
static const char *const fls_strings[] =
{ "1024", "512", "256", "??" };
static int dbg_command_buf(char *buf, unsigned len,
const char *label, u32 command)
{
return scnprintf(buf, len,
"%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
label, label[0] ? " " : "", command,
(command & CMD_PARK) ? "park" : "(park)",
CMD_PARK_CNT(command),
(command >> 16) & 0x3f,
(command & CMD_LRESET) ? " LReset" : "",
(command & CMD_IAAD) ? " IAAD" : "",
(command & CMD_ASE) ? " Async" : "",
(command & CMD_PSE) ? " Periodic" : "",
fls_strings[(command >> 2) & 0x3],
(command & CMD_RESET) ? " Reset" : "",
(command & CMD_RUN) ? "RUN" : "HALT"
);
}
static int dbg_port_buf(char *buf, unsigned len, const char *label,
int port, u32 status)
{
char *sig;
/* signaling state */
switch (status & (3 << 10)) {
case 0 << 10:
sig = "se0";
break;
case 1 << 10:
sig = "k"; /* low speed */
break;
case 2 << 10:
sig = "j";
break;
default:
sig = "?";
break;
}
return scnprintf(buf, len,
"%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
label, label[0] ? " " : "", port, status,
(status & PORT_POWER) ? " POWER" : "",
(status & PORT_OWNER) ? " OWNER" : "",
sig,
(status & PORT_RESET) ? " RESET" : "",
(status & PORT_SUSPEND) ? " SUSPEND" : "",
(status & PORT_RESUME) ? " RESUME" : "",
(status & PORT_OCC) ? " OCC" : "",
(status & PORT_OC) ? " OC" : "",
(status & PORT_PEC) ? " PEC" : "",
(status & PORT_PE) ? " PE" : "",
(status & PORT_CSC) ? " CSC" : "",
(status & PORT_CONNECT) ? " CONNECT" : ""
);
}
#else
static inline int __attribute__((__unused__))
dbg_status_buf(char *buf, unsigned len, const char *label, u32 status)
{ return 0; }
static inline int __attribute__((__unused__))
dbg_command_buf(char *buf, unsigned len, const char *label, u32 command)
{ return 0; }
static inline int __attribute__((__unused__))
dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable)
{ return 0; }
static inline int __attribute__((__unused__))
dbg_port_buf(char *buf, unsigned len, const char *label, int port, u32 status)
{ return 0; }
#endif /* DEBUG */
/* functions have the "wrong" filename when they're output... */
#define dbg_status(oxu, label, status) { \
char _buf[80]; \
dbg_status_buf(_buf, sizeof _buf, label, status); \
oxu_dbg(oxu, "%s\n", _buf); \
}
#define dbg_cmd(oxu, label, command) { \
char _buf[80]; \
dbg_command_buf(_buf, sizeof _buf, label, command); \
oxu_dbg(oxu, "%s\n", _buf); \
}
#define dbg_port(oxu, label, port, status) { \
char _buf[80]; \
dbg_port_buf(_buf, sizeof _buf, label, port, status); \
oxu_dbg(oxu, "%s\n", _buf); \
}
/*
* Module parameters
*/
/* Initial IRQ latency: faster than hw default */
static int log2_irq_thresh; /* 0 to 6 */
module_param(log2_irq_thresh, int, S_IRUGO);
MODULE_PARM_DESC(log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
/* Initial park setting: slower than hw default */
static unsigned park;
module_param(park, uint, S_IRUGO);
MODULE_PARM_DESC(park, "park setting; 1-3 back-to-back async packets");
/* For flakey hardware, ignore overcurrent indicators */
static bool ignore_oc;
module_param(ignore_oc, bool, S_IRUGO);
MODULE_PARM_DESC(ignore_oc, "ignore bogus hardware overcurrent indications");
static void ehci_work(struct oxu_hcd *oxu);
static int oxu_hub_control(struct usb_hcd *hcd,
u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
/*
* Local functions
*/
/* Low level read/write registers functions */
static inline u32 oxu_readl(void __iomem *base, u32 reg)
{
return readl(base + reg);
}
static inline void oxu_writel(void __iomem *base, u32 reg, u32 val)
{
writel(val, base + reg);
}
static inline void timer_action_done(struct oxu_hcd *oxu,
enum ehci_timer_action action)
{
clear_bit(action, &oxu->actions);
}
static inline void timer_action(struct oxu_hcd *oxu,
enum ehci_timer_action action)
{
if (!test_and_set_bit(action, &oxu->actions)) {
unsigned long t;
switch (action) {
case TIMER_IAA_WATCHDOG:
t = EHCI_IAA_JIFFIES;
break;
case TIMER_IO_WATCHDOG:
t = EHCI_IO_JIFFIES;
break;
case TIMER_ASYNC_OFF:
t = EHCI_ASYNC_JIFFIES;
break;
case TIMER_ASYNC_SHRINK:
default:
t = EHCI_SHRINK_JIFFIES;
break;
}
t += jiffies;
/* all timings except IAA watchdog can be overridden.
* async queue SHRINK often precedes IAA. while it's ready
* to go OFF neither can matter, and afterwards the IO
* watchdog stops unless there's still periodic traffic.
*/
if (action != TIMER_IAA_WATCHDOG
&& t > oxu->watchdog.expires
&& timer_pending(&oxu->watchdog))
return;
mod_timer(&oxu->watchdog, t);
}
}
/*
* handshake - spin reading hc until handshake completes or fails
* @ptr: address of hc register to be read
* @mask: bits to look at in result of read
* @done: value of those bits when handshake succeeds
* @usec: timeout in microseconds
*
* Returns negative errno, or zero on success
*
* Success happens when the "mask" bits have the specified value (hardware
* handshake done). There are two failure modes: "usec" have passed (major
* hardware flakeout), or the register reads as all-ones (hardware removed).
*
* That last failure should_only happen in cases like physical cardbus eject
* before driver shutdown. But it also seems to be caused by bugs in cardbus
* bridge shutdown: shutting down the bridge before the devices using it.
*/
static int handshake(struct oxu_hcd *oxu, void __iomem *ptr,
u32 mask, u32 done, int usec)
{
u32 result;
do {
result = readl(ptr);
if (result == ~(u32)0) /* card removed */
return -ENODEV;
result &= mask;
if (result == done)
return 0;
udelay(1);
usec--;
} while (usec > 0);
return -ETIMEDOUT;
}
/* Force HC to halt state from unknown (EHCI spec section 2.3) */
static int ehci_halt(struct oxu_hcd *oxu)
{
u32 temp = readl(&oxu->regs->status);
/* disable any irqs left enabled by previous code */
writel(0, &oxu->regs->intr_enable);
if ((temp & STS_HALT) != 0)
return 0;
temp = readl(&oxu->regs->command);
temp &= ~CMD_RUN;
writel(temp, &oxu->regs->command);
return handshake(oxu, &oxu->regs->status,
STS_HALT, STS_HALT, 16 * 125);
}
/* Put TDI/ARC silicon into EHCI mode */
static void tdi_reset(struct oxu_hcd *oxu)
{
u32 __iomem *reg_ptr;
u32 tmp;
reg_ptr = (u32 __iomem *)(((u8 __iomem *)oxu->regs) + 0x68);
tmp = readl(reg_ptr);
tmp |= 0x3;
writel(tmp, reg_ptr);
}
/* Reset a non-running (STS_HALT == 1) controller */
static int ehci_reset(struct oxu_hcd *oxu)
{
int retval;
u32 command = readl(&oxu->regs->command);
command |= CMD_RESET;
dbg_cmd(oxu, "reset", command);
writel(command, &oxu->regs->command);
oxu_to_hcd(oxu)->state = HC_STATE_HALT;
oxu->next_statechange = jiffies;
retval = handshake(oxu, &oxu->regs->command,
CMD_RESET, 0, 250 * 1000);
if (retval)
return retval;
tdi_reset(oxu);
return retval;
}
/* Idle the controller (from running) */
static void ehci_quiesce(struct oxu_hcd *oxu)
{
u32 temp;
#ifdef DEBUG
BUG_ON(!HC_IS_RUNNING(oxu_to_hcd(oxu)->state));
#endif
/* wait for any schedule enables/disables to take effect */
temp = readl(&oxu->regs->command) << 10;
temp &= STS_ASS | STS_PSS;
if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS,
temp, 16 * 125) != 0) {
oxu_to_hcd(oxu)->state = HC_STATE_HALT;
return;
}
/* then disable anything that's still active */
temp = readl(&oxu->regs->command);
temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE);
writel(temp, &oxu->regs->command);
/* hardware can take 16 microframes to turn off ... */
if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS,
0, 16 * 125) != 0) {
oxu_to_hcd(oxu)->state = HC_STATE_HALT;
return;
}
}
static int check_reset_complete(struct oxu_hcd *oxu, int index,
u32 __iomem *status_reg, int port_status)
{
if (!(port_status & PORT_CONNECT)) {
oxu->reset_done[index] = 0;
return port_status;
}
/* if reset finished and it's still not enabled -- handoff */
if (!(port_status & PORT_PE)) {
oxu_dbg(oxu, "Failed to enable port %d on root hub TT\n",
index+1);
return port_status;
} else
oxu_dbg(oxu, "port %d high speed\n", index + 1);
return port_status;
}
static void ehci_hub_descriptor(struct oxu_hcd *oxu,
struct usb_hub_descriptor *desc)
{
int ports = HCS_N_PORTS(oxu->hcs_params);
u16 temp;
desc->bDescriptorType = USB_DT_HUB;
desc->bPwrOn2PwrGood = 10; /* oxu 1.0, 2.3.9 says 20ms max */
desc->bHubContrCurrent = 0;
desc->bNbrPorts = ports;
temp = 1 + (ports / 8);
desc->bDescLength = 7 + 2 * temp;
/* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
USB 3.0 Hub Changes Update the USB core to deal with USB 3.0 hubs. These hubs have a slightly different hub descriptor than USB 2.0 hubs, with a fixed (rather than variable length) size. Change the USB core's hub descriptor to have a union for the last fields that differ. Change the host controller drivers that access those last fields (DeviceRemovable and PortPowerCtrlMask) to use the union. Translate the new version of the hub port status field into the old version that khubd understands. (Note: we need to fix it to translate the roothub's port status once we stop converting it to USB 2.0 hub status internally.) Add new code to handle link state change status. Send out new control messages that are needed for USB 3.0 hubs, like Set Hub Depth. This patch is a modified version of the original patch submitted by John Youn. It's updated to reflect the removal of the "bitmap" #define, and change the hub descriptor accesses of a couple new host controller drivers. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: Tony Olech <tony.olech@elandigitalsystems.com> Cc: "Robert P. J. Day" <rpjday@crashcourse.ca> Cc: Max Vozeler <mvz@vozeler.com> Cc: Tejun Heo <tj@kernel.org> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: Rodolfo Giometti <giometti@linux.it> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Anton Vorontsov <avorontsov@mvista.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Lothar Wassmann <LW@KARO-electronics.de> Cc: Olav Kongas <ok@artecdesign.ee> Cc: Martin Fuzzey <mfuzzey@gmail.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net>
2001-09-17 15:00:00 +08:00
memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
if (HCS_PPC(oxu->hcs_params))
temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
else
temp |= HUB_CHAR_NO_LPSM; /* no power switching */
desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
}
/* Allocate an OXU210HP on-chip memory data buffer
*
* An on-chip memory data buffer is required for each OXU210HP USB transfer.
* Each transfer descriptor has one or more on-chip memory data buffers.
*
* Data buffers are allocated from a fix sized pool of data blocks.
* To minimise fragmentation and give reasonable memory utlisation,
* data buffers are allocated with sizes the power of 2 multiples of
* the block size, starting on an address a multiple of the allocated size.
*
* FIXME: callers of this function require a buffer to be allocated for
* len=0. This is a waste of on-chip memory and should be fix. Then this
* function should be changed to not allocate a buffer for len=0.
*/
static int oxu_buf_alloc(struct oxu_hcd *oxu, struct ehci_qtd *qtd, int len)
{
int n_blocks; /* minium blocks needed to hold len */
int a_blocks; /* blocks allocated */
int i, j;
/* Don't allocte bigger than supported */
if (len > BUFFER_SIZE * BUFFER_NUM) {
oxu_err(oxu, "buffer too big (%d)\n", len);
return -ENOMEM;
}
spin_lock(&oxu->mem_lock);
/* Number of blocks needed to hold len */
n_blocks = (len + BUFFER_SIZE - 1) / BUFFER_SIZE;
/* Round the number of blocks up to the power of 2 */
for (a_blocks = 1; a_blocks < n_blocks; a_blocks <<= 1)
;
/* Find a suitable available data buffer */
for (i = 0; i < BUFFER_NUM;
i += max(a_blocks, (int)oxu->db_used[i])) {
/* Check all the required blocks are available */
for (j = 0; j < a_blocks; j++)
if (oxu->db_used[i + j])
break;
if (j != a_blocks)
continue;
/* Allocate blocks found! */
qtd->buffer = (void *) &oxu->mem->db_pool[i];
qtd->buffer_dma = virt_to_phys(qtd->buffer);
qtd->qtd_buffer_len = BUFFER_SIZE * a_blocks;
oxu->db_used[i] = a_blocks;
spin_unlock(&oxu->mem_lock);
return 0;
}
/* Failed */
spin_unlock(&oxu->mem_lock);
return -ENOMEM;
}
static void oxu_buf_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd)
{
int index;
spin_lock(&oxu->mem_lock);
index = (qtd->buffer - (void *) &oxu->mem->db_pool[0])
/ BUFFER_SIZE;
oxu->db_used[index] = 0;
qtd->qtd_buffer_len = 0;
qtd->buffer_dma = 0;
qtd->buffer = NULL;
spin_unlock(&oxu->mem_lock);
}
static inline void ehci_qtd_init(struct ehci_qtd *qtd, dma_addr_t dma)
{
memset(qtd, 0, sizeof *qtd);
qtd->qtd_dma = dma;
qtd->hw_token = cpu_to_le32(QTD_STS_HALT);
qtd->hw_next = EHCI_LIST_END;
qtd->hw_alt_next = EHCI_LIST_END;
INIT_LIST_HEAD(&qtd->qtd_list);
}
static inline void oxu_qtd_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd)
{
int index;
if (qtd->buffer)
oxu_buf_free(oxu, qtd);
spin_lock(&oxu->mem_lock);
index = qtd - &oxu->mem->qtd_pool[0];
oxu->qtd_used[index] = 0;
spin_unlock(&oxu->mem_lock);
}
static struct ehci_qtd *ehci_qtd_alloc(struct oxu_hcd *oxu)
{
int i;
struct ehci_qtd *qtd = NULL;
spin_lock(&oxu->mem_lock);
for (i = 0; i < QTD_NUM; i++)
if (!oxu->qtd_used[i])
break;
if (i < QTD_NUM) {
qtd = (struct ehci_qtd *) &oxu->mem->qtd_pool[i];
memset(qtd, 0, sizeof *qtd);
qtd->hw_token = cpu_to_le32(QTD_STS_HALT);
qtd->hw_next = EHCI_LIST_END;
qtd->hw_alt_next = EHCI_LIST_END;
INIT_LIST_HEAD(&qtd->qtd_list);
qtd->qtd_dma = virt_to_phys(qtd);
oxu->qtd_used[i] = 1;
}
spin_unlock(&oxu->mem_lock);
return qtd;
}
static void oxu_qh_free(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
int index;
spin_lock(&oxu->mem_lock);
index = qh - &oxu->mem->qh_pool[0];
oxu->qh_used[index] = 0;
spin_unlock(&oxu->mem_lock);
}
static void qh_destroy(struct kref *kref)
{
struct ehci_qh *qh = container_of(kref, struct ehci_qh, kref);
struct oxu_hcd *oxu = qh->oxu;
/* clean qtds first, and know this is not linked */
if (!list_empty(&qh->qtd_list) || qh->qh_next.ptr) {
oxu_dbg(oxu, "unused qh not empty!\n");
BUG();
}
if (qh->dummy)
oxu_qtd_free(oxu, qh->dummy);
oxu_qh_free(oxu, qh);
}
static struct ehci_qh *oxu_qh_alloc(struct oxu_hcd *oxu)
{
int i;
struct ehci_qh *qh = NULL;
spin_lock(&oxu->mem_lock);
for (i = 0; i < QHEAD_NUM; i++)
if (!oxu->qh_used[i])
break;
if (i < QHEAD_NUM) {
qh = (struct ehci_qh *) &oxu->mem->qh_pool[i];
memset(qh, 0, sizeof *qh);
kref_init(&qh->kref);
qh->oxu = oxu;
qh->qh_dma = virt_to_phys(qh);
INIT_LIST_HEAD(&qh->qtd_list);
/* dummy td enables safe urb queuing */
qh->dummy = ehci_qtd_alloc(oxu);
if (qh->dummy == NULL) {
oxu_dbg(oxu, "no dummy td\n");
oxu->qh_used[i] = 0;
qh = NULL;
goto unlock;
}
oxu->qh_used[i] = 1;
}
unlock:
spin_unlock(&oxu->mem_lock);
return qh;
}
/* to share a qh (cpu threads, or hc) */
static inline struct ehci_qh *qh_get(struct ehci_qh *qh)
{
kref_get(&qh->kref);
return qh;
}
static inline void qh_put(struct ehci_qh *qh)
{
kref_put(&qh->kref, qh_destroy);
}
static void oxu_murb_free(struct oxu_hcd *oxu, struct oxu_murb *murb)
{
int index;
spin_lock(&oxu->mem_lock);
index = murb - &oxu->murb_pool[0];
oxu->murb_used[index] = 0;
spin_unlock(&oxu->mem_lock);
}
static struct oxu_murb *oxu_murb_alloc(struct oxu_hcd *oxu)
{
int i;
struct oxu_murb *murb = NULL;
spin_lock(&oxu->mem_lock);
for (i = 0; i < MURB_NUM; i++)
if (!oxu->murb_used[i])
break;
if (i < MURB_NUM) {
murb = &(oxu->murb_pool)[i];
oxu->murb_used[i] = 1;
}
spin_unlock(&oxu->mem_lock);
return murb;
}
/* The queue heads and transfer descriptors are managed from pools tied
* to each of the "per device" structures.
* This is the initialisation and cleanup code.
*/
static void ehci_mem_cleanup(struct oxu_hcd *oxu)
{
kfree(oxu->murb_pool);
oxu->murb_pool = NULL;
if (oxu->async)
qh_put(oxu->async);
oxu->async = NULL;
del_timer(&oxu->urb_timer);
oxu->periodic = NULL;
/* shadow periodic table */
kfree(oxu->pshadow);
oxu->pshadow = NULL;
}
/* Remember to add cleanup code (above) if you add anything here.
*/
static int ehci_mem_init(struct oxu_hcd *oxu, gfp_t flags)
{
int i;
for (i = 0; i < oxu->periodic_size; i++)
oxu->mem->frame_list[i] = EHCI_LIST_END;
for (i = 0; i < QHEAD_NUM; i++)
oxu->qh_used[i] = 0;
for (i = 0; i < QTD_NUM; i++)
oxu->qtd_used[i] = 0;
oxu->murb_pool = kcalloc(MURB_NUM, sizeof(struct oxu_murb), flags);
if (!oxu->murb_pool)
goto fail;
for (i = 0; i < MURB_NUM; i++)
oxu->murb_used[i] = 0;
oxu->async = oxu_qh_alloc(oxu);
if (!oxu->async)
goto fail;
oxu->periodic = (__le32 *) &oxu->mem->frame_list;
oxu->periodic_dma = virt_to_phys(oxu->periodic);
for (i = 0; i < oxu->periodic_size; i++)
oxu->periodic[i] = EHCI_LIST_END;
/* software shadow of hardware table */
oxu->pshadow = kcalloc(oxu->periodic_size, sizeof(void *), flags);
if (oxu->pshadow != NULL)
return 0;
fail:
oxu_dbg(oxu, "couldn't init memory\n");
ehci_mem_cleanup(oxu);
return -ENOMEM;
}
/* Fill a qtd, returning how much of the buffer we were able to queue up.
*/
static int qtd_fill(struct ehci_qtd *qtd, dma_addr_t buf, size_t len,
int token, int maxpacket)
{
int i, count;
u64 addr = buf;
/* one buffer entry per 4K ... first might be short or unaligned */
qtd->hw_buf[0] = cpu_to_le32((u32)addr);
qtd->hw_buf_hi[0] = cpu_to_le32((u32)(addr >> 32));
count = 0x1000 - (buf & 0x0fff); /* rest of that page */
if (likely(len < count)) /* ... iff needed */
count = len;
else {
buf += 0x1000;
buf &= ~0x0fff;
/* per-qtd limit: from 16K to 20K (best alignment) */
for (i = 1; count < len && i < 5; i++) {
addr = buf;
qtd->hw_buf[i] = cpu_to_le32((u32)addr);
qtd->hw_buf_hi[i] = cpu_to_le32((u32)(addr >> 32));
buf += 0x1000;
if ((count + 0x1000) < len)
count += 0x1000;
else
count = len;
}
/* short packets may only terminate transfers */
if (count != len)
count -= (count % maxpacket);
}
qtd->hw_token = cpu_to_le32((count << 16) | token);
qtd->length = count;
return count;
}
static inline void qh_update(struct oxu_hcd *oxu,
struct ehci_qh *qh, struct ehci_qtd *qtd)
{
/* writes to an active overlay are unsafe */
BUG_ON(qh->qh_state != QH_STATE_IDLE);
qh->hw_qtd_next = QTD_NEXT(qtd->qtd_dma);
qh->hw_alt_next = EHCI_LIST_END;
/* Except for control endpoints, we make hardware maintain data
* toggle (like OHCI) ... here (re)initialize the toggle in the QH,
* and set the pseudo-toggle in udev. Only usb_clear_halt() will
* ever clear it.
*/
if (!(qh->hw_info1 & cpu_to_le32(1 << 14))) {
unsigned is_out, epnum;
is_out = !(qtd->hw_token & cpu_to_le32(1 << 8));
epnum = (le32_to_cpup(&qh->hw_info1) >> 8) & 0x0f;
if (unlikely(!usb_gettoggle(qh->dev, epnum, is_out))) {
qh->hw_token &= ~cpu_to_le32(QTD_TOGGLE);
usb_settoggle(qh->dev, epnum, is_out, 1);
}
}
/* HC must see latest qtd and qh data before we clear ACTIVE+HALT */
wmb();
qh->hw_token &= cpu_to_le32(QTD_TOGGLE | QTD_STS_PING);
}
/* If it weren't for a common silicon quirk (writing the dummy into the qh
* overlay, so qh->hw_token wrongly becomes inactive/halted), only fault
* recovery (including urb dequeue) would need software changes to a QH...
*/
static void qh_refresh(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
struct ehci_qtd *qtd;
if (list_empty(&qh->qtd_list))
qtd = qh->dummy;
else {
qtd = list_entry(qh->qtd_list.next,
struct ehci_qtd, qtd_list);
/* first qtd may already be partially processed */
if (cpu_to_le32(qtd->qtd_dma) == qh->hw_current)
qtd = NULL;
}
if (qtd)
qh_update(oxu, qh, qtd);
}
static void qtd_copy_status(struct oxu_hcd *oxu, struct urb *urb,
size_t length, u32 token)
{
/* count IN/OUT bytes, not SETUP (even short packets) */
if (likely(QTD_PID(token) != 2))
urb->actual_length += length - QTD_LENGTH(token);
/* don't modify error codes */
if (unlikely(urb->status != -EINPROGRESS))
return;
/* force cleanup after short read; not always an error */
if (unlikely(IS_SHORT_READ(token)))
urb->status = -EREMOTEIO;
/* serious "can't proceed" faults reported by the hardware */
if (token & QTD_STS_HALT) {
if (token & QTD_STS_BABBLE) {
/* FIXME "must" disable babbling device's port too */
urb->status = -EOVERFLOW;
} else if (token & QTD_STS_MMF) {
/* fs/ls interrupt xfer missed the complete-split */
urb->status = -EPROTO;
} else if (token & QTD_STS_DBE) {
urb->status = (QTD_PID(token) == 1) /* IN ? */
? -ENOSR /* hc couldn't read data */
: -ECOMM; /* hc couldn't write data */
} else if (token & QTD_STS_XACT) {
/* timeout, bad crc, wrong PID, etc; retried */
if (QTD_CERR(token))
urb->status = -EPIPE;
else {
oxu_dbg(oxu, "devpath %s ep%d%s 3strikes\n",
urb->dev->devpath,
usb_pipeendpoint(urb->pipe),
usb_pipein(urb->pipe) ? "in" : "out");
urb->status = -EPROTO;
}
/* CERR nonzero + no errors + halt --> stall */
} else if (QTD_CERR(token))
urb->status = -EPIPE;
else /* unknown */
urb->status = -EPROTO;
oxu_vdbg(oxu, "dev%d ep%d%s qtd token %08x --> status %d\n",
usb_pipedevice(urb->pipe),
usb_pipeendpoint(urb->pipe),
usb_pipein(urb->pipe) ? "in" : "out",
token, urb->status);
}
}
static void ehci_urb_done(struct oxu_hcd *oxu, struct urb *urb)
__releases(oxu->lock)
__acquires(oxu->lock)
{
if (likely(urb->hcpriv != NULL)) {
struct ehci_qh *qh = (struct ehci_qh *) urb->hcpriv;
/* S-mask in a QH means it's an interrupt urb */
if ((qh->hw_info2 & cpu_to_le32(QH_SMASK)) != 0) {
/* ... update hc-wide periodic stats (for usbfs) */
oxu_to_hcd(oxu)->self.bandwidth_int_reqs--;
}
qh_put(qh);
}
urb->hcpriv = NULL;
switch (urb->status) {
case -EINPROGRESS: /* success */
urb->status = 0;
default: /* fault */
break;
case -EREMOTEIO: /* fault or normal */
if (!(urb->transfer_flags & URB_SHORT_NOT_OK))
urb->status = 0;
break;
case -ECONNRESET: /* canceled */
case -ENOENT:
break;
}
#ifdef OXU_URB_TRACE
oxu_dbg(oxu, "%s %s urb %p ep%d%s status %d len %d/%d\n",
__func__, urb->dev->devpath, urb,
usb_pipeendpoint(urb->pipe),
usb_pipein(urb->pipe) ? "in" : "out",
urb->status,
urb->actual_length, urb->transfer_buffer_length);
#endif
/* complete() can reenter this HCD */
spin_unlock(&oxu->lock);
usb_hcd_giveback_urb(oxu_to_hcd(oxu), urb, urb->status);
spin_lock(&oxu->lock);
}
static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh);
static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh);
static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh);
static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh);
#define HALT_BIT cpu_to_le32(QTD_STS_HALT)
/* Process and free completed qtds for a qh, returning URBs to drivers.
* Chases up to qh->hw_current. Returns number of completions called,
* indicating how much "real" work we did.
*/
static unsigned qh_completions(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
struct ehci_qtd *last = NULL, *end = qh->dummy;
struct ehci_qtd *qtd, *tmp;
int stopped;
unsigned count = 0;
int do_status = 0;
u8 state;
struct oxu_murb *murb = NULL;
if (unlikely(list_empty(&qh->qtd_list)))
return count;
/* completions (or tasks on other cpus) must never clobber HALT
* till we've gone through and cleaned everything up, even when
* they add urbs to this qh's queue or mark them for unlinking.
*
* NOTE: unlinking expects to be done in queue order.
*/
state = qh->qh_state;
qh->qh_state = QH_STATE_COMPLETING;
stopped = (state == QH_STATE_IDLE);
/* remove de-activated QTDs from front of queue.
* after faults (including short reads), cleanup this urb
* then let the queue advance.
* if queue is stopped, handles unlinks.
*/
list_for_each_entry_safe(qtd, tmp, &qh->qtd_list, qtd_list) {
struct urb *urb;
u32 token = 0;
urb = qtd->urb;
/* Clean up any state from previous QTD ...*/
if (last) {
if (likely(last->urb != urb)) {
if (last->urb->complete == NULL) {
murb = (struct oxu_murb *) last->urb;
last->urb = murb->main;
if (murb->last) {
ehci_urb_done(oxu, last->urb);
count++;
}
oxu_murb_free(oxu, murb);
} else {
ehci_urb_done(oxu, last->urb);
count++;
}
}
oxu_qtd_free(oxu, last);
last = NULL;
}
/* ignore urbs submitted during completions we reported */
if (qtd == end)
break;
/* hardware copies qtd out of qh overlay */
rmb();
token = le32_to_cpu(qtd->hw_token);
/* always clean up qtds the hc de-activated */
if ((token & QTD_STS_ACTIVE) == 0) {
if ((token & QTD_STS_HALT) != 0) {
stopped = 1;
/* magic dummy for some short reads; qh won't advance.
* that silicon quirk can kick in with this dummy too.
*/
} else if (IS_SHORT_READ(token) &&
!(qtd->hw_alt_next & EHCI_LIST_END)) {
stopped = 1;
goto halt;
}
/* stop scanning when we reach qtds the hc is using */
} else if (likely(!stopped &&
HC_IS_RUNNING(oxu_to_hcd(oxu)->state))) {
break;
} else {
stopped = 1;
if (unlikely(!HC_IS_RUNNING(oxu_to_hcd(oxu)->state)))
urb->status = -ESHUTDOWN;
/* ignore active urbs unless some previous qtd
* for the urb faulted (including short read) or
* its urb was canceled. we may patch qh or qtds.
*/
if (likely(urb->status == -EINPROGRESS))
continue;
/* issue status after short control reads */
if (unlikely(do_status != 0)
&& QTD_PID(token) == 0 /* OUT */) {
do_status = 0;
continue;
}
/* token in overlay may be most current */
if (state == QH_STATE_IDLE
&& cpu_to_le32(qtd->qtd_dma)
== qh->hw_current)
token = le32_to_cpu(qh->hw_token);
/* force halt for unlinked or blocked qh, so we'll
* patch the qh later and so that completions can't
* activate it while we "know" it's stopped.
*/
if ((HALT_BIT & qh->hw_token) == 0) {
halt:
qh->hw_token |= HALT_BIT;
wmb();
}
}
/* Remove it from the queue */
qtd_copy_status(oxu, urb->complete ?
urb : ((struct oxu_murb *) urb)->main,
qtd->length, token);
if ((usb_pipein(qtd->urb->pipe)) &&
(NULL != qtd->transfer_buffer))
memcpy(qtd->transfer_buffer, qtd->buffer, qtd->length);
do_status = (urb->status == -EREMOTEIO)
&& usb_pipecontrol(urb->pipe);
if (stopped && qtd->qtd_list.prev != &qh->qtd_list) {
last = list_entry(qtd->qtd_list.prev,
struct ehci_qtd, qtd_list);
last->hw_next = qtd->hw_next;
}
list_del(&qtd->qtd_list);
last = qtd;
}
/* last urb's completion might still need calling */
if (likely(last != NULL)) {
if (last->urb->complete == NULL) {
murb = (struct oxu_murb *) last->urb;
last->urb = murb->main;
if (murb->last) {
ehci_urb_done(oxu, last->urb);
count++;
}
oxu_murb_free(oxu, murb);
} else {
ehci_urb_done(oxu, last->urb);
count++;
}
oxu_qtd_free(oxu, last);
}
/* restore original state; caller must unlink or relink */
qh->qh_state = state;
/* be sure the hardware's done with the qh before refreshing
* it after fault cleanup, or recovering from silicon wrongly
* overlaying the dummy qtd (which reduces DMA chatter).
*/
if (stopped != 0 || qh->hw_qtd_next == EHCI_LIST_END) {
switch (state) {
case QH_STATE_IDLE:
qh_refresh(oxu, qh);
break;
case QH_STATE_LINKED:
/* should be rare for periodic transfers,
* except maybe high bandwidth ...
*/
if ((cpu_to_le32(QH_SMASK)
& qh->hw_info2) != 0) {
intr_deschedule(oxu, qh);
(void) qh_schedule(oxu, qh);
} else
unlink_async(oxu, qh);
break;
/* otherwise, unlink already started */
}
}
return count;
}
/* High bandwidth multiplier, as encoded in highspeed endpoint descriptors */
#define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03))
/* ... and packet size, for any kind of endpoint descriptor */
#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
/* Reverse of qh_urb_transaction: free a list of TDs.
* used for cleanup after errors, before HC sees an URB's TDs.
*/
static void qtd_list_free(struct oxu_hcd *oxu,
struct urb *urb, struct list_head *head)
{
struct ehci_qtd *qtd, *temp;
list_for_each_entry_safe(qtd, temp, head, qtd_list) {
list_del(&qtd->qtd_list);
oxu_qtd_free(oxu, qtd);
}
}
/* Create a list of filled qtds for this URB; won't link into qh.
*/
static struct list_head *qh_urb_transaction(struct oxu_hcd *oxu,
struct urb *urb,
struct list_head *head,
gfp_t flags)
{
struct ehci_qtd *qtd, *qtd_prev;
dma_addr_t buf;
int len, maxpacket;
int is_input;
u32 token;
void *transfer_buf = NULL;
int ret;
/*
* URBs map to sequences of QTDs: one logical transaction
*/
qtd = ehci_qtd_alloc(oxu);
if (unlikely(!qtd))
return NULL;
list_add_tail(&qtd->qtd_list, head);
qtd->urb = urb;
token = QTD_STS_ACTIVE;
token |= (EHCI_TUNE_CERR << 10);
/* for split transactions, SplitXState initialized to zero */
len = urb->transfer_buffer_length;
is_input = usb_pipein(urb->pipe);
if (!urb->transfer_buffer && urb->transfer_buffer_length && is_input)
urb->transfer_buffer = phys_to_virt(urb->transfer_dma);
if (usb_pipecontrol(urb->pipe)) {
/* SETUP pid */
ret = oxu_buf_alloc(oxu, qtd, sizeof(struct usb_ctrlrequest));
if (ret)
goto cleanup;
qtd_fill(qtd, qtd->buffer_dma, sizeof(struct usb_ctrlrequest),
token | (2 /* "setup" */ << 8), 8);
memcpy(qtd->buffer, qtd->urb->setup_packet,
sizeof(struct usb_ctrlrequest));
/* ... and always at least one more pid */
token ^= QTD_TOGGLE;
qtd_prev = qtd;
qtd = ehci_qtd_alloc(oxu);
if (unlikely(!qtd))
goto cleanup;
qtd->urb = urb;
qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma);
list_add_tail(&qtd->qtd_list, head);
/* for zero length DATA stages, STATUS is always IN */
if (len == 0)
token |= (1 /* "in" */ << 8);
}
/*
* Data transfer stage: buffer setup
*/
ret = oxu_buf_alloc(oxu, qtd, len);
if (ret)
goto cleanup;
buf = qtd->buffer_dma;
transfer_buf = urb->transfer_buffer;
if (!is_input)
memcpy(qtd->buffer, qtd->urb->transfer_buffer, len);
if (is_input)
token |= (1 /* "in" */ << 8);
/* else it's already initted to "out" pid (0 << 8) */
maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
/*
* buffer gets wrapped in one or more qtds;
* last one may be "short" (including zero len)
* and may serve as a control status ack
*/
for (;;) {
int this_qtd_len;
this_qtd_len = qtd_fill(qtd, buf, len, token, maxpacket);
qtd->transfer_buffer = transfer_buf;
len -= this_qtd_len;
buf += this_qtd_len;
transfer_buf += this_qtd_len;
if (is_input)
qtd->hw_alt_next = oxu->async->hw_alt_next;
/* qh makes control packets use qtd toggle; maybe switch it */
if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
token ^= QTD_TOGGLE;
if (likely(len <= 0))
break;
qtd_prev = qtd;
qtd = ehci_qtd_alloc(oxu);
if (unlikely(!qtd))
goto cleanup;
if (likely(len > 0)) {
ret = oxu_buf_alloc(oxu, qtd, len);
if (ret)
goto cleanup;
}
qtd->urb = urb;
qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma);
list_add_tail(&qtd->qtd_list, head);
}
/* unless the bulk/interrupt caller wants a chance to clean
* up after short reads, hc should advance qh past this urb
*/
if (likely((urb->transfer_flags & URB_SHORT_NOT_OK) == 0
|| usb_pipecontrol(urb->pipe)))
qtd->hw_alt_next = EHCI_LIST_END;
/*
* control requests may need a terminating data "status" ack;
* bulk ones may need a terminating short packet (zero length).
*/
if (likely(urb->transfer_buffer_length != 0)) {
int one_more = 0;
if (usb_pipecontrol(urb->pipe)) {
one_more = 1;
token ^= 0x0100; /* "in" <--> "out" */
token |= QTD_TOGGLE; /* force DATA1 */
} else if (usb_pipebulk(urb->pipe)
&& (urb->transfer_flags & URB_ZERO_PACKET)
&& !(urb->transfer_buffer_length % maxpacket)) {
one_more = 1;
}
if (one_more) {
qtd_prev = qtd;
qtd = ehci_qtd_alloc(oxu);
if (unlikely(!qtd))
goto cleanup;
qtd->urb = urb;
qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma);
list_add_tail(&qtd->qtd_list, head);
/* never any data in such packets */
qtd_fill(qtd, 0, 0, token, 0);
}
}
/* by default, enable interrupt on urb completion */
qtd->hw_token |= cpu_to_le32(QTD_IOC);
return head;
cleanup:
qtd_list_free(oxu, urb, head);
return NULL;
}
/* Each QH holds a qtd list; a QH is used for everything except iso.
*
* For interrupt urbs, the scheduler must set the microframe scheduling
* mask(s) each time the QH gets scheduled. For highspeed, that's
* just one microframe in the s-mask. For split interrupt transactions
* there are additional complications: c-mask, maybe FSTNs.
*/
static struct ehci_qh *qh_make(struct oxu_hcd *oxu,
struct urb *urb, gfp_t flags)
{
struct ehci_qh *qh = oxu_qh_alloc(oxu);
u32 info1 = 0, info2 = 0;
int is_input, type;
int maxp = 0;
if (!qh)
return qh;
/*
* init endpoint/device data for this QH
*/
info1 |= usb_pipeendpoint(urb->pipe) << 8;
info1 |= usb_pipedevice(urb->pipe) << 0;
is_input = usb_pipein(urb->pipe);
type = usb_pipetype(urb->pipe);
maxp = usb_maxpacket(urb->dev, urb->pipe, !is_input);
/* Compute interrupt scheduling parameters just once, and save.
* - allowing for high bandwidth, how many nsec/uframe are used?
* - split transactions need a second CSPLIT uframe; same question
* - splits also need a schedule gap (for full/low speed I/O)
* - qh has a polling interval
*
* For control/bulk requests, the HC or TT handles these.
*/
if (type == PIPE_INTERRUPT) {
qh->usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH,
is_input, 0,
hb_mult(maxp) * max_packet(maxp)));
qh->start = NO_FRAME;
if (urb->dev->speed == USB_SPEED_HIGH) {
qh->c_usecs = 0;
qh->gap_uf = 0;
qh->period = urb->interval >> 3;
if (qh->period == 0 && urb->interval != 1) {
/* NOTE interval 2 or 4 uframes could work.
* But interval 1 scheduling is simpler, and
* includes high bandwidth.
*/
oxu_dbg(oxu, "intr period %d uframes, NYET!\n",
urb->interval);
goto done;
}
} else {
struct usb_tt *tt = urb->dev->tt;
int think_time;
/* gap is f(FS/LS transfer times) */
qh->gap_uf = 1 + usb_calc_bus_time(urb->dev->speed,
is_input, 0, maxp) / (125 * 1000);
/* FIXME this just approximates SPLIT/CSPLIT times */
if (is_input) { /* SPLIT, gap, CSPLIT+DATA */
qh->c_usecs = qh->usecs + HS_USECS(0);
qh->usecs = HS_USECS(1);
} else { /* SPLIT+DATA, gap, CSPLIT */
qh->usecs += HS_USECS(1);
qh->c_usecs = HS_USECS(0);
}
think_time = tt ? tt->think_time : 0;
qh->tt_usecs = NS_TO_US(think_time +
usb_calc_bus_time(urb->dev->speed,
is_input, 0, max_packet(maxp)));
qh->period = urb->interval;
}
}
/* support for tt scheduling, and access to toggles */
qh->dev = urb->dev;
/* using TT? */
switch (urb->dev->speed) {
case USB_SPEED_LOW:
info1 |= (1 << 12); /* EPS "low" */
/* FALL THROUGH */
case USB_SPEED_FULL:
/* EPS 0 means "full" */
if (type != PIPE_INTERRUPT)
info1 |= (EHCI_TUNE_RL_TT << 28);
if (type == PIPE_CONTROL) {
info1 |= (1 << 27); /* for TT */
info1 |= 1 << 14; /* toggle from qtd */
}
info1 |= maxp << 16;
info2 |= (EHCI_TUNE_MULT_TT << 30);
info2 |= urb->dev->ttport << 23;
/* NOTE: if (PIPE_INTERRUPT) { scheduler sets c-mask } */
break;
case USB_SPEED_HIGH: /* no TT involved */
info1 |= (2 << 12); /* EPS "high" */
if (type == PIPE_CONTROL) {
info1 |= (EHCI_TUNE_RL_HS << 28);
info1 |= 64 << 16; /* usb2 fixed maxpacket */
info1 |= 1 << 14; /* toggle from qtd */
info2 |= (EHCI_TUNE_MULT_HS << 30);
} else if (type == PIPE_BULK) {
info1 |= (EHCI_TUNE_RL_HS << 28);
info1 |= 512 << 16; /* usb2 fixed maxpacket */
info2 |= (EHCI_TUNE_MULT_HS << 30);
} else { /* PIPE_INTERRUPT */
info1 |= max_packet(maxp) << 16;
info2 |= hb_mult(maxp) << 30;
}
break;
default:
oxu_dbg(oxu, "bogus dev %p speed %d\n", urb->dev, urb->dev->speed);
done:
qh_put(qh);
return NULL;
}
/* NOTE: if (PIPE_INTERRUPT) { scheduler sets s-mask } */
/* init as live, toggle clear, advance to dummy */
qh->qh_state = QH_STATE_IDLE;
qh->hw_info1 = cpu_to_le32(info1);
qh->hw_info2 = cpu_to_le32(info2);
usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input, 1);
qh_refresh(oxu, qh);
return qh;
}
/* Move qh (and its qtds) onto async queue; maybe enable queue.
*/
static void qh_link_async(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
__le32 dma = QH_NEXT(qh->qh_dma);
struct ehci_qh *head;
/* (re)start the async schedule? */
head = oxu->async;
timer_action_done(oxu, TIMER_ASYNC_OFF);
if (!head->qh_next.qh) {
u32 cmd = readl(&oxu->regs->command);
if (!(cmd & CMD_ASE)) {
/* in case a clear of CMD_ASE didn't take yet */
(void)handshake(oxu, &oxu->regs->status,
STS_ASS, 0, 150);
cmd |= CMD_ASE | CMD_RUN;
writel(cmd, &oxu->regs->command);
oxu_to_hcd(oxu)->state = HC_STATE_RUNNING;
/* posted write need not be known to HC yet ... */
}
}
/* clear halt and/or toggle; and maybe recover from silicon quirk */
if (qh->qh_state == QH_STATE_IDLE)
qh_refresh(oxu, qh);
/* splice right after start */
qh->qh_next = head->qh_next;
qh->hw_next = head->hw_next;
wmb();
head->qh_next.qh = qh;
head->hw_next = dma;
qh->qh_state = QH_STATE_LINKED;
/* qtd completions reported later by interrupt */
}
#define QH_ADDR_MASK cpu_to_le32(0x7f)
/*
* For control/bulk/interrupt, return QH with these TDs appended.
* Allocates and initializes the QH if necessary.
* Returns null if it can't allocate a QH it needs to.
* If the QH has TDs (urbs) already, that's great.
*/
static struct ehci_qh *qh_append_tds(struct oxu_hcd *oxu,
struct urb *urb, struct list_head *qtd_list,
int epnum, void **ptr)
{
struct ehci_qh *qh = NULL;
qh = (struct ehci_qh *) *ptr;
if (unlikely(qh == NULL)) {
/* can't sleep here, we have oxu->lock... */
qh = qh_make(oxu, urb, GFP_ATOMIC);
*ptr = qh;
}
if (likely(qh != NULL)) {
struct ehci_qtd *qtd;
if (unlikely(list_empty(qtd_list)))
qtd = NULL;
else
qtd = list_entry(qtd_list->next, struct ehci_qtd,
qtd_list);
/* control qh may need patching ... */
if (unlikely(epnum == 0)) {
/* usb_reset_device() briefly reverts to address 0 */
if (usb_pipedevice(urb->pipe) == 0)
qh->hw_info1 &= ~QH_ADDR_MASK;
}
/* just one way to queue requests: swap with the dummy qtd.
* only hc or qh_refresh() ever modify the overlay.
*/
if (likely(qtd != NULL)) {
struct ehci_qtd *dummy;
dma_addr_t dma;
__le32 token;
/* to avoid racing the HC, use the dummy td instead of
* the first td of our list (becomes new dummy). both
* tds stay deactivated until we're done, when the
* HC is allowed to fetch the old dummy (4.10.2).
*/
token = qtd->hw_token;
qtd->hw_token = HALT_BIT;
wmb();
dummy = qh->dummy;
dma = dummy->qtd_dma;
*dummy = *qtd;
dummy->qtd_dma = dma;
list_del(&qtd->qtd_list);
list_add(&dummy->qtd_list, qtd_list);
list_splice(qtd_list, qh->qtd_list.prev);
ehci_qtd_init(qtd, qtd->qtd_dma);
qh->dummy = qtd;
/* hc must see the new dummy at list end */
dma = qtd->qtd_dma;
qtd = list_entry(qh->qtd_list.prev,
struct ehci_qtd, qtd_list);
qtd->hw_next = QTD_NEXT(dma);
/* let the hc process these next qtds */
dummy->hw_token = (token & ~(0x80));
wmb();
dummy->hw_token = token;
urb->hcpriv = qh_get(qh);
}
}
return qh;
}
static int submit_async(struct oxu_hcd *oxu, struct urb *urb,
struct list_head *qtd_list, gfp_t mem_flags)
{
struct ehci_qtd *qtd;
int epnum;
unsigned long flags;
struct ehci_qh *qh = NULL;
int rc = 0;
qtd = list_entry(qtd_list->next, struct ehci_qtd, qtd_list);
epnum = urb->ep->desc.bEndpointAddress;
#ifdef OXU_URB_TRACE
oxu_dbg(oxu, "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n",
__func__, urb->dev->devpath, urb,
epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out",
urb->transfer_buffer_length,
qtd, urb->ep->hcpriv);
#endif
spin_lock_irqsave(&oxu->lock, flags);
if (unlikely(!HCD_HW_ACCESSIBLE(oxu_to_hcd(oxu)))) {
rc = -ESHUTDOWN;
goto done;
}
qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv);
if (unlikely(qh == NULL)) {
rc = -ENOMEM;
goto done;
}
/* Control/bulk operations through TTs don't need scheduling,
* the HC and TT handle it when the TT has a buffer ready.
*/
if (likely(qh->qh_state == QH_STATE_IDLE))
qh_link_async(oxu, qh_get(qh));
done:
spin_unlock_irqrestore(&oxu->lock, flags);
if (unlikely(qh == NULL))
qtd_list_free(oxu, urb, qtd_list);
return rc;
}
/* The async qh for the qtds being reclaimed are now unlinked from the HC */
static void end_unlink_async(struct oxu_hcd *oxu)
{
struct ehci_qh *qh = oxu->reclaim;
struct ehci_qh *next;
timer_action_done(oxu, TIMER_IAA_WATCHDOG);
qh->qh_state = QH_STATE_IDLE;
qh->qh_next.qh = NULL;
qh_put(qh); /* refcount from reclaim */
/* other unlink(s) may be pending (in QH_STATE_UNLINK_WAIT) */
next = qh->reclaim;
oxu->reclaim = next;
oxu->reclaim_ready = 0;
qh->reclaim = NULL;
qh_completions(oxu, qh);
if (!list_empty(&qh->qtd_list)
&& HC_IS_RUNNING(oxu_to_hcd(oxu)->state))
qh_link_async(oxu, qh);
else {
qh_put(qh); /* refcount from async list */
/* it's not free to turn the async schedule on/off; leave it
* active but idle for a while once it empties.
*/
if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state)
&& oxu->async->qh_next.qh == NULL)
timer_action(oxu, TIMER_ASYNC_OFF);
}
if (next) {
oxu->reclaim = NULL;
start_unlink_async(oxu, next);
}
}
/* makes sure the async qh will become idle */
/* caller must own oxu->lock */
static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
int cmd = readl(&oxu->regs->command);
struct ehci_qh *prev;
#ifdef DEBUG
assert_spin_locked(&oxu->lock);
BUG_ON(oxu->reclaim || (qh->qh_state != QH_STATE_LINKED
&& qh->qh_state != QH_STATE_UNLINK_WAIT));
#endif
/* stop async schedule right now? */
if (unlikely(qh == oxu->async)) {
/* can't get here without STS_ASS set */
if (oxu_to_hcd(oxu)->state != HC_STATE_HALT
&& !oxu->reclaim) {
/* ... and CMD_IAAD clear */
writel(cmd & ~CMD_ASE, &oxu->regs->command);
wmb();
/* handshake later, if we need to */
timer_action_done(oxu, TIMER_ASYNC_OFF);
}
return;
}
qh->qh_state = QH_STATE_UNLINK;
oxu->reclaim = qh = qh_get(qh);
prev = oxu->async;
while (prev->qh_next.qh != qh)
prev = prev->qh_next.qh;
prev->hw_next = qh->hw_next;
prev->qh_next = qh->qh_next;
wmb();
if (unlikely(oxu_to_hcd(oxu)->state == HC_STATE_HALT)) {
/* if (unlikely(qh->reclaim != 0))
* this will recurse, probably not much
*/
end_unlink_async(oxu);
return;
}
oxu->reclaim_ready = 0;
cmd |= CMD_IAAD;
writel(cmd, &oxu->regs->command);
(void) readl(&oxu->regs->command);
timer_action(oxu, TIMER_IAA_WATCHDOG);
}
static void scan_async(struct oxu_hcd *oxu)
{
struct ehci_qh *qh;
enum ehci_timer_action action = TIMER_IO_WATCHDOG;
if (!++(oxu->stamp))
oxu->stamp++;
timer_action_done(oxu, TIMER_ASYNC_SHRINK);
rescan:
qh = oxu->async->qh_next.qh;
if (likely(qh != NULL)) {
do {
/* clean any finished work for this qh */
if (!list_empty(&qh->qtd_list)
&& qh->stamp != oxu->stamp) {
int temp;
/* unlinks could happen here; completion
* reporting drops the lock. rescan using
* the latest schedule, but don't rescan
* qhs we already finished (no looping).
*/
qh = qh_get(qh);
qh->stamp = oxu->stamp;
temp = qh_completions(oxu, qh);
qh_put(qh);
if (temp != 0)
goto rescan;
}
/* unlink idle entries, reducing HC PCI usage as well
* as HCD schedule-scanning costs. delay for any qh
* we just scanned, there's a not-unusual case that it
* doesn't stay idle for long.
* (plus, avoids some kind of re-activation race.)
*/
if (list_empty(&qh->qtd_list)) {
if (qh->stamp == oxu->stamp)
action = TIMER_ASYNC_SHRINK;
else if (!oxu->reclaim
&& qh->qh_state == QH_STATE_LINKED)
start_unlink_async(oxu, qh);
}
qh = qh->qh_next.qh;
} while (qh);
}
if (action == TIMER_ASYNC_SHRINK)
timer_action(oxu, TIMER_ASYNC_SHRINK);
}
/*
* periodic_next_shadow - return "next" pointer on shadow list
* @periodic: host pointer to qh/itd/sitd
* @tag: hardware tag for type of this record
*/
static union ehci_shadow *periodic_next_shadow(union ehci_shadow *periodic,
__le32 tag)
{
switch (tag) {
default:
case Q_TYPE_QH:
return &periodic->qh->qh_next;
}
}
/* caller must hold oxu->lock */
static void periodic_unlink(struct oxu_hcd *oxu, unsigned frame, void *ptr)
{
union ehci_shadow *prev_p = &oxu->pshadow[frame];
__le32 *hw_p = &oxu->periodic[frame];
union ehci_shadow here = *prev_p;
/* find predecessor of "ptr"; hw and shadow lists are in sync */
while (here.ptr && here.ptr != ptr) {
prev_p = periodic_next_shadow(prev_p, Q_NEXT_TYPE(*hw_p));
hw_p = here.hw_next;
here = *prev_p;
}
/* an interrupt entry (at list end) could have been shared */
if (!here.ptr)
return;
/* update shadow and hardware lists ... the old "next" pointers
* from ptr may still be in use, the caller updates them.
*/
*prev_p = *periodic_next_shadow(&here, Q_NEXT_TYPE(*hw_p));
*hw_p = *here.hw_next;
}
/* how many of the uframe's 125 usecs are allocated? */
static unsigned short periodic_usecs(struct oxu_hcd *oxu,
unsigned frame, unsigned uframe)
{
__le32 *hw_p = &oxu->periodic[frame];
union ehci_shadow *q = &oxu->pshadow[frame];
unsigned usecs = 0;
while (q->ptr) {
switch (Q_NEXT_TYPE(*hw_p)) {
case Q_TYPE_QH:
default:
/* is it in the S-mask? */
if (q->qh->hw_info2 & cpu_to_le32(1 << uframe))
usecs += q->qh->usecs;
/* ... or C-mask? */
if (q->qh->hw_info2 & cpu_to_le32(1 << (8 + uframe)))
usecs += q->qh->c_usecs;
hw_p = &q->qh->hw_next;
q = &q->qh->qh_next;
break;
}
}
#ifdef DEBUG
if (usecs > 100)
oxu_err(oxu, "uframe %d sched overrun: %d usecs\n",
frame * 8 + uframe, usecs);
#endif
return usecs;
}
static int enable_periodic(struct oxu_hcd *oxu)
{
u32 cmd;
int status;
/* did clearing PSE did take effect yet?
* takes effect only at frame boundaries...
*/
status = handshake(oxu, &oxu->regs->status, STS_PSS, 0, 9 * 125);
if (status != 0) {
oxu_to_hcd(oxu)->state = HC_STATE_HALT;
USB: remove remaining usages of hcd->state from usbcore and fix regression This patch (as1467) removes the last usages of hcd->state from usbcore. We no longer check to see if an interrupt handler finds that a controller has died; instead we rely on host controller drivers to make an explicit call to usb_hc_died(). This fixes a regression introduced by commit 9b37596a2e860404503a3f2a6513db60c296bfdc (USB: move usbcore away from hcd->state). It used to be that when a controller shared an IRQ with another device and an interrupt arrived while hcd->state was set to HC_STATE_HALT, the interrupt handler would be skipped. The commit removed that test; as a result the current code doesn't skip calling the handler and ends up believing the controller has died, even though it's only temporarily stopped. The solution is to ignore HC_STATE_HALT following the handler's return. As a consequence of this change, several of the host controller drivers need to be modified. They can no longer implicitly rely on usbcore realizing that a controller has died because of hcd->state. The patch adds calls to usb_hc_died() in the appropriate places. The patch also changes a few of the interrupt handlers. They don't expect to be called when hcd->state is equal to HC_STATE_HALT, even if the controller is still alive. Early returns were added to avoid any confusion. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> CC: Rodolfo Giometti <giometti@linux.it> CC: Olav Kongas <ok@artecdesign.ee> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-18 05:27:12 +08:00
usb_hc_died(oxu_to_hcd(oxu));
return status;
}
cmd = readl(&oxu->regs->command) | CMD_PSE;
writel(cmd, &oxu->regs->command);
/* posted write ... PSS happens later */
oxu_to_hcd(oxu)->state = HC_STATE_RUNNING;
/* make sure ehci_work scans these */
oxu->next_uframe = readl(&oxu->regs->frame_index)
% (oxu->periodic_size << 3);
return 0;
}
static int disable_periodic(struct oxu_hcd *oxu)
{
u32 cmd;
int status;
/* did setting PSE not take effect yet?
* takes effect only at frame boundaries...
*/
status = handshake(oxu, &oxu->regs->status, STS_PSS, STS_PSS, 9 * 125);
if (status != 0) {
oxu_to_hcd(oxu)->state = HC_STATE_HALT;
USB: remove remaining usages of hcd->state from usbcore and fix regression This patch (as1467) removes the last usages of hcd->state from usbcore. We no longer check to see if an interrupt handler finds that a controller has died; instead we rely on host controller drivers to make an explicit call to usb_hc_died(). This fixes a regression introduced by commit 9b37596a2e860404503a3f2a6513db60c296bfdc (USB: move usbcore away from hcd->state). It used to be that when a controller shared an IRQ with another device and an interrupt arrived while hcd->state was set to HC_STATE_HALT, the interrupt handler would be skipped. The commit removed that test; as a result the current code doesn't skip calling the handler and ends up believing the controller has died, even though it's only temporarily stopped. The solution is to ignore HC_STATE_HALT following the handler's return. As a consequence of this change, several of the host controller drivers need to be modified. They can no longer implicitly rely on usbcore realizing that a controller has died because of hcd->state. The patch adds calls to usb_hc_died() in the appropriate places. The patch also changes a few of the interrupt handlers. They don't expect to be called when hcd->state is equal to HC_STATE_HALT, even if the controller is still alive. Early returns were added to avoid any confusion. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> CC: Rodolfo Giometti <giometti@linux.it> CC: Olav Kongas <ok@artecdesign.ee> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-18 05:27:12 +08:00
usb_hc_died(oxu_to_hcd(oxu));
return status;
}
cmd = readl(&oxu->regs->command) & ~CMD_PSE;
writel(cmd, &oxu->regs->command);
/* posted write ... */
oxu->next_uframe = -1;
return 0;
}
/* periodic schedule slots have iso tds (normal or split) first, then a
* sparse tree for active interrupt transfers.
*
* this just links in a qh; caller guarantees uframe masks are set right.
* no FSTN support (yet; oxu 0.96+)
*/
static int qh_link_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
unsigned i;
unsigned period = qh->period;
dev_dbg(&qh->dev->dev,
"link qh%d-%04x/%p start %d [%d/%d us]\n",
period, le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK),
qh, qh->start, qh->usecs, qh->c_usecs);
/* high bandwidth, or otherwise every microframe */
if (period == 0)
period = 1;
for (i = qh->start; i < oxu->periodic_size; i += period) {
union ehci_shadow *prev = &oxu->pshadow[i];
__le32 *hw_p = &oxu->periodic[i];
union ehci_shadow here = *prev;
__le32 type = 0;
/* skip the iso nodes at list head */
while (here.ptr) {
type = Q_NEXT_TYPE(*hw_p);
if (type == Q_TYPE_QH)
break;
prev = periodic_next_shadow(prev, type);
hw_p = &here.qh->hw_next;
here = *prev;
}
/* sorting each branch by period (slow-->fast)
* enables sharing interior tree nodes
*/
while (here.ptr && qh != here.qh) {
if (qh->period > here.qh->period)
break;
prev = &here.qh->qh_next;
hw_p = &here.qh->hw_next;
here = *prev;
}
/* link in this qh, unless some earlier pass did that */
if (qh != here.qh) {
qh->qh_next = here;
if (here.qh)
qh->hw_next = *hw_p;
wmb();
prev->qh = qh;
*hw_p = QH_NEXT(qh->qh_dma);
}
}
qh->qh_state = QH_STATE_LINKED;
qh_get(qh);
/* update per-qh bandwidth for usbfs */
oxu_to_hcd(oxu)->self.bandwidth_allocated += qh->period
? ((qh->usecs + qh->c_usecs) / qh->period)
: (qh->usecs * 8);
/* maybe enable periodic schedule processing */
if (!oxu->periodic_sched++)
return enable_periodic(oxu);
return 0;
}
static void qh_unlink_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
unsigned i;
unsigned period;
/* FIXME:
* IF this isn't high speed
* and this qh is active in the current uframe
* (and overlay token SplitXstate is false?)
* THEN
* qh->hw_info1 |= cpu_to_le32(1 << 7 "ignore");
*/
/* high bandwidth, or otherwise part of every microframe */
period = qh->period;
if (period == 0)
period = 1;
for (i = qh->start; i < oxu->periodic_size; i += period)
periodic_unlink(oxu, i, qh);
/* update per-qh bandwidth for usbfs */
oxu_to_hcd(oxu)->self.bandwidth_allocated -= qh->period
? ((qh->usecs + qh->c_usecs) / qh->period)
: (qh->usecs * 8);
dev_dbg(&qh->dev->dev,
"unlink qh%d-%04x/%p start %d [%d/%d us]\n",
qh->period,
le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK),
qh, qh->start, qh->usecs, qh->c_usecs);
/* qh->qh_next still "live" to HC */
qh->qh_state = QH_STATE_UNLINK;
qh->qh_next.ptr = NULL;
qh_put(qh);
/* maybe turn off periodic schedule */
oxu->periodic_sched--;
if (!oxu->periodic_sched)
(void) disable_periodic(oxu);
}
static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
unsigned wait;
qh_unlink_periodic(oxu, qh);
/* simple/paranoid: always delay, expecting the HC needs to read
* qh->hw_next or finish a writeback after SPLIT/CSPLIT ... and
* expect hub_wq to clean up after any CSPLITs we won't issue.
* active high speed queues may need bigger delays...
*/
if (list_empty(&qh->qtd_list)
|| (cpu_to_le32(QH_CMASK) & qh->hw_info2) != 0)
wait = 2;
else
wait = 55; /* worst case: 3 * 1024 */
udelay(wait);
qh->qh_state = QH_STATE_IDLE;
qh->hw_next = EHCI_LIST_END;
wmb();
}
static int check_period(struct oxu_hcd *oxu,
unsigned frame, unsigned uframe,
unsigned period, unsigned usecs)
{
int claimed;
/* complete split running into next frame?
* given FSTN support, we could sometimes check...
*/
if (uframe >= 8)
return 0;
/*
* 80% periodic == 100 usec/uframe available
* convert "usecs we need" to "max already claimed"
*/
usecs = 100 - usecs;
/* we "know" 2 and 4 uframe intervals were rejected; so
* for period 0, check _every_ microframe in the schedule.
*/
if (unlikely(period == 0)) {
do {
for (uframe = 0; uframe < 7; uframe++) {
claimed = periodic_usecs(oxu, frame, uframe);
if (claimed > usecs)
return 0;
}
} while ((frame += 1) < oxu->periodic_size);
/* just check the specified uframe, at that period */
} else {
do {
claimed = periodic_usecs(oxu, frame, uframe);
if (claimed > usecs)
return 0;
} while ((frame += period) < oxu->periodic_size);
}
return 1;
}
static int check_intr_schedule(struct oxu_hcd *oxu,
unsigned frame, unsigned uframe,
const struct ehci_qh *qh, __le32 *c_maskp)
{
int retval = -ENOSPC;
if (qh->c_usecs && uframe >= 6) /* FSTN territory? */
goto done;
if (!check_period(oxu, frame, uframe, qh->period, qh->usecs))
goto done;
if (!qh->c_usecs) {
retval = 0;
*c_maskp = 0;
goto done;
}
done:
return retval;
}
/* "first fit" scheduling policy used the first time through,
* or when the previous schedule slot can't be re-used.
*/
static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
int status;
unsigned uframe;
__le32 c_mask;
unsigned frame; /* 0..(qh->period - 1), or NO_FRAME */
qh_refresh(oxu, qh);
qh->hw_next = EHCI_LIST_END;
frame = qh->start;
/* reuse the previous schedule slots, if we can */
if (frame < qh->period) {
uframe = ffs(le32_to_cpup(&qh->hw_info2) & QH_SMASK);
status = check_intr_schedule(oxu, frame, --uframe,
qh, &c_mask);
} else {
uframe = 0;
c_mask = 0;
status = -ENOSPC;
}
/* else scan the schedule to find a group of slots such that all
* uframes have enough periodic bandwidth available.
*/
if (status) {
/* "normal" case, uframing flexible except with splits */
if (qh->period) {
frame = qh->period - 1;
do {
for (uframe = 0; uframe < 8; uframe++) {
status = check_intr_schedule(oxu,
frame, uframe, qh,
&c_mask);
if (status == 0)
break;
}
} while (status && frame--);
/* qh->period == 0 means every uframe */
} else {
frame = 0;
status = check_intr_schedule(oxu, 0, 0, qh, &c_mask);
}
if (status)
goto done;
qh->start = frame;
/* reset S-frame and (maybe) C-frame masks */
qh->hw_info2 &= cpu_to_le32(~(QH_CMASK | QH_SMASK));
qh->hw_info2 |= qh->period
? cpu_to_le32(1 << uframe)
: cpu_to_le32(QH_SMASK);
qh->hw_info2 |= c_mask;
} else
oxu_dbg(oxu, "reused qh %p schedule\n", qh);
/* stuff into the periodic schedule */
status = qh_link_periodic(oxu, qh);
done:
return status;
}
static int intr_submit(struct oxu_hcd *oxu, struct urb *urb,
struct list_head *qtd_list, gfp_t mem_flags)
{
unsigned epnum;
unsigned long flags;
struct ehci_qh *qh;
int status = 0;
struct list_head empty;
/* get endpoint and transfer/schedule data */
epnum = urb->ep->desc.bEndpointAddress;
spin_lock_irqsave(&oxu->lock, flags);
if (unlikely(!HCD_HW_ACCESSIBLE(oxu_to_hcd(oxu)))) {
status = -ESHUTDOWN;
goto done;
}
/* get qh and force any scheduling errors */
INIT_LIST_HEAD(&empty);
qh = qh_append_tds(oxu, urb, &empty, epnum, &urb->ep->hcpriv);
if (qh == NULL) {
status = -ENOMEM;
goto done;
}
if (qh->qh_state == QH_STATE_IDLE) {
status = qh_schedule(oxu, qh);
if (status != 0)
goto done;
}
/* then queue the urb's tds to the qh */
qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv);
BUG_ON(qh == NULL);
/* ... update usbfs periodic stats */
oxu_to_hcd(oxu)->self.bandwidth_int_reqs++;
done:
spin_unlock_irqrestore(&oxu->lock, flags);
if (status)
qtd_list_free(oxu, urb, qtd_list);
return status;
}
static inline int itd_submit(struct oxu_hcd *oxu, struct urb *urb,
gfp_t mem_flags)
{
oxu_dbg(oxu, "iso support is missing!\n");
return -ENOSYS;
}
static inline int sitd_submit(struct oxu_hcd *oxu, struct urb *urb,
gfp_t mem_flags)
{
oxu_dbg(oxu, "split iso support is missing!\n");
return -ENOSYS;
}
static void scan_periodic(struct oxu_hcd *oxu)
{
unsigned frame, clock, now_uframe, mod;
unsigned modified;
mod = oxu->periodic_size << 3;
/*
* When running, scan from last scan point up to "now"
* else clean up by scanning everything that's left.
* Touches as few pages as possible: cache-friendly.
*/
now_uframe = oxu->next_uframe;
if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state))
clock = readl(&oxu->regs->frame_index);
else
clock = now_uframe + mod - 1;
clock %= mod;
for (;;) {
union ehci_shadow q, *q_p;
__le32 type, *hw_p;
/* don't scan past the live uframe */
frame = now_uframe >> 3;
if (frame != (clock >> 3)) {
/* safe to scan the whole frame at once */
now_uframe |= 0x07;
}
restart:
/* scan each element in frame's queue for completions */
q_p = &oxu->pshadow[frame];
hw_p = &oxu->periodic[frame];
q.ptr = q_p->ptr;
type = Q_NEXT_TYPE(*hw_p);
modified = 0;
while (q.ptr != NULL) {
union ehci_shadow temp;
switch (type) {
case Q_TYPE_QH:
/* handle any completions */
temp.qh = qh_get(q.qh);
type = Q_NEXT_TYPE(q.qh->hw_next);
q = q.qh->qh_next;
modified = qh_completions(oxu, temp.qh);
if (unlikely(list_empty(&temp.qh->qtd_list)))
intr_deschedule(oxu, temp.qh);
qh_put(temp.qh);
break;
default:
oxu_dbg(oxu, "corrupt type %d frame %d shadow %p\n",
type, frame, q.ptr);
q.ptr = NULL;
}
/* assume completion callbacks modify the queue */
if (unlikely(modified))
goto restart;
}
/* Stop when we catch up to the HC */
/* FIXME: this assumes we won't get lapped when
* latencies climb; that should be rare, but...
* detect it, and just go all the way around.
* FLR might help detect this case, so long as latencies
* don't exceed periodic_size msec (default 1.024 sec).
*/
/* FIXME: likewise assumes HC doesn't halt mid-scan */
if (now_uframe == clock) {
unsigned now;
if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state))
break;
oxu->next_uframe = now_uframe;
now = readl(&oxu->regs->frame_index) % mod;
if (now_uframe == now)
break;
/* rescan the rest of this frame, then ... */
clock = now;
} else {
now_uframe++;
now_uframe %= mod;
}
}
}
/* On some systems, leaving remote wakeup enabled prevents system shutdown.
* The firmware seems to think that powering off is a wakeup event!
* This routine turns off remote wakeup and everything else, on all ports.
*/
static void ehci_turn_off_all_ports(struct oxu_hcd *oxu)
{
int port = HCS_N_PORTS(oxu->hcs_params);
while (port--)
writel(PORT_RWC_BITS, &oxu->regs->port_status[port]);
}
static void ehci_port_power(struct oxu_hcd *oxu, int is_on)
{
unsigned port;
if (!HCS_PPC(oxu->hcs_params))
return;
oxu_dbg(oxu, "...power%s ports...\n", is_on ? "up" : "down");
for (port = HCS_N_PORTS(oxu->hcs_params); port > 0; ) {
if (is_on)
oxu_hub_control(oxu_to_hcd(oxu), SetPortFeature,
USB_PORT_FEAT_POWER, port--, NULL, 0);
else
oxu_hub_control(oxu_to_hcd(oxu), ClearPortFeature,
USB_PORT_FEAT_POWER, port--, NULL, 0);
}
msleep(20);
}
/* Called from some interrupts, timers, and so on.
* It calls driver completion functions, after dropping oxu->lock.
*/
static void ehci_work(struct oxu_hcd *oxu)
{
timer_action_done(oxu, TIMER_IO_WATCHDOG);
if (oxu->reclaim_ready)
end_unlink_async(oxu);
/* another CPU may drop oxu->lock during a schedule scan while
* it reports urb completions. this flag guards against bogus
* attempts at re-entrant schedule scanning.
*/
if (oxu->scanning)
return;
oxu->scanning = 1;
scan_async(oxu);
if (oxu->next_uframe != -1)
scan_periodic(oxu);
oxu->scanning = 0;
/* the IO watchdog guards against hardware or driver bugs that
* misplace IRQs, and should let us run completely without IRQs.
* such lossage has been observed on both VT6202 and VT8235.
*/
if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state) &&
(oxu->async->qh_next.ptr != NULL ||
oxu->periodic_sched != 0))
timer_action(oxu, TIMER_IO_WATCHDOG);
}
static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh)
{
/* if we need to use IAA and it's busy, defer */
if (qh->qh_state == QH_STATE_LINKED
&& oxu->reclaim
&& HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) {
struct ehci_qh *last;
for (last = oxu->reclaim;
last->reclaim;
last = last->reclaim)
continue;
qh->qh_state = QH_STATE_UNLINK_WAIT;
last->reclaim = qh;
/* bypass IAA if the hc can't care */
} else if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state) && oxu->reclaim)
end_unlink_async(oxu);
/* something else might have unlinked the qh by now */
if (qh->qh_state == QH_STATE_LINKED)
start_unlink_async(oxu, qh);
}
/*
* USB host controller methods
*/
static irqreturn_t oxu210_hcd_irq(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
u32 status, pcd_status = 0;
int bh;
spin_lock(&oxu->lock);
status = readl(&oxu->regs->status);
/* e.g. cardbus physical eject */
if (status == ~(u32) 0) {
oxu_dbg(oxu, "device removed\n");
goto dead;
}
USB: remove remaining usages of hcd->state from usbcore and fix regression This patch (as1467) removes the last usages of hcd->state from usbcore. We no longer check to see if an interrupt handler finds that a controller has died; instead we rely on host controller drivers to make an explicit call to usb_hc_died(). This fixes a regression introduced by commit 9b37596a2e860404503a3f2a6513db60c296bfdc (USB: move usbcore away from hcd->state). It used to be that when a controller shared an IRQ with another device and an interrupt arrived while hcd->state was set to HC_STATE_HALT, the interrupt handler would be skipped. The commit removed that test; as a result the current code doesn't skip calling the handler and ends up believing the controller has died, even though it's only temporarily stopped. The solution is to ignore HC_STATE_HALT following the handler's return. As a consequence of this change, several of the host controller drivers need to be modified. They can no longer implicitly rely on usbcore realizing that a controller has died because of hcd->state. The patch adds calls to usb_hc_died() in the appropriate places. The patch also changes a few of the interrupt handlers. They don't expect to be called when hcd->state is equal to HC_STATE_HALT, even if the controller is still alive. Early returns were added to avoid any confusion. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> CC: Rodolfo Giometti <giometti@linux.it> CC: Olav Kongas <ok@artecdesign.ee> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-18 05:27:12 +08:00
/* Shared IRQ? */
status &= INTR_MASK;
USB: remove remaining usages of hcd->state from usbcore and fix regression This patch (as1467) removes the last usages of hcd->state from usbcore. We no longer check to see if an interrupt handler finds that a controller has died; instead we rely on host controller drivers to make an explicit call to usb_hc_died(). This fixes a regression introduced by commit 9b37596a2e860404503a3f2a6513db60c296bfdc (USB: move usbcore away from hcd->state). It used to be that when a controller shared an IRQ with another device and an interrupt arrived while hcd->state was set to HC_STATE_HALT, the interrupt handler would be skipped. The commit removed that test; as a result the current code doesn't skip calling the handler and ends up believing the controller has died, even though it's only temporarily stopped. The solution is to ignore HC_STATE_HALT following the handler's return. As a consequence of this change, several of the host controller drivers need to be modified. They can no longer implicitly rely on usbcore realizing that a controller has died because of hcd->state. The patch adds calls to usb_hc_died() in the appropriate places. The patch also changes a few of the interrupt handlers. They don't expect to be called when hcd->state is equal to HC_STATE_HALT, even if the controller is still alive. Early returns were added to avoid any confusion. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> CC: Rodolfo Giometti <giometti@linux.it> CC: Olav Kongas <ok@artecdesign.ee> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-18 05:27:12 +08:00
if (!status || unlikely(hcd->state == HC_STATE_HALT)) {
spin_unlock(&oxu->lock);
return IRQ_NONE;
}
/* clear (just) interrupts */
writel(status, &oxu->regs->status);
readl(&oxu->regs->command); /* unblock posted write */
bh = 0;
#ifdef OXU_VERBOSE_DEBUG
/* unrequested/ignored: Frame List Rollover */
dbg_status(oxu, "irq", status);
#endif
/* INT, ERR, and IAA interrupt rates can be throttled */
/* normal [4.15.1.2] or error [4.15.1.1] completion */
if (likely((status & (STS_INT|STS_ERR)) != 0))
bh = 1;
/* complete the unlinking of some qh [4.15.2.3] */
if (status & STS_IAA) {
oxu->reclaim_ready = 1;
bh = 1;
}
/* remote wakeup [4.3.1] */
if (status & STS_PCD) {
unsigned i = HCS_N_PORTS(oxu->hcs_params);
pcd_status = status;
/* resume root hub? */
if (!(readl(&oxu->regs->command) & CMD_RUN))
usb_hcd_resume_root_hub(hcd);
while (i--) {
int pstatus = readl(&oxu->regs->port_status[i]);
if (pstatus & PORT_OWNER)
continue;
if (!(pstatus & PORT_RESUME)
|| oxu->reset_done[i] != 0)
continue;
/* start USB_RESUME_TIMEOUT resume signaling from this
* port, and make hub_wq collect PORT_STAT_C_SUSPEND to
* stop that signaling.
*/
oxu->reset_done[i] = jiffies +
msecs_to_jiffies(USB_RESUME_TIMEOUT);
oxu_dbg(oxu, "port %d remote wakeup\n", i + 1);
mod_timer(&hcd->rh_timer, oxu->reset_done[i]);
}
}
/* PCI errors [4.15.2.4] */
if (unlikely((status & STS_FATAL) != 0)) {
/* bogus "fatal" IRQs appear on some chips... why? */
status = readl(&oxu->regs->status);
dbg_cmd(oxu, "fatal", readl(&oxu->regs->command));
dbg_status(oxu, "fatal", status);
if (status & STS_HALT) {
oxu_err(oxu, "fatal error\n");
dead:
ehci_reset(oxu);
writel(0, &oxu->regs->configured_flag);
USB: remove remaining usages of hcd->state from usbcore and fix regression This patch (as1467) removes the last usages of hcd->state from usbcore. We no longer check to see if an interrupt handler finds that a controller has died; instead we rely on host controller drivers to make an explicit call to usb_hc_died(). This fixes a regression introduced by commit 9b37596a2e860404503a3f2a6513db60c296bfdc (USB: move usbcore away from hcd->state). It used to be that when a controller shared an IRQ with another device and an interrupt arrived while hcd->state was set to HC_STATE_HALT, the interrupt handler would be skipped. The commit removed that test; as a result the current code doesn't skip calling the handler and ends up believing the controller has died, even though it's only temporarily stopped. The solution is to ignore HC_STATE_HALT following the handler's return. As a consequence of this change, several of the host controller drivers need to be modified. They can no longer implicitly rely on usbcore realizing that a controller has died because of hcd->state. The patch adds calls to usb_hc_died() in the appropriate places. The patch also changes a few of the interrupt handlers. They don't expect to be called when hcd->state is equal to HC_STATE_HALT, even if the controller is still alive. Early returns were added to avoid any confusion. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> CC: Rodolfo Giometti <giometti@linux.it> CC: Olav Kongas <ok@artecdesign.ee> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-18 05:27:12 +08:00
usb_hc_died(hcd);
/* generic layer kills/unlinks all urbs, then
* uses oxu_stop to clean up the rest
*/
bh = 1;
}
}
if (bh)
ehci_work(oxu);
spin_unlock(&oxu->lock);
if (pcd_status & STS_PCD)
usb_hcd_poll_rh_status(hcd);
return IRQ_HANDLED;
}
static irqreturn_t oxu_irq(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
int ret = IRQ_HANDLED;
u32 status = oxu_readl(hcd->regs, OXU_CHIPIRQSTATUS);
u32 enable = oxu_readl(hcd->regs, OXU_CHIPIRQEN_SET);
/* Disable all interrupt */
oxu_writel(hcd->regs, OXU_CHIPIRQEN_CLR, enable);
if ((oxu->is_otg && (status & OXU_USBOTGI)) ||
(!oxu->is_otg && (status & OXU_USBSPHI)))
oxu210_hcd_irq(hcd);
else
ret = IRQ_NONE;
/* Enable all interrupt back */
oxu_writel(hcd->regs, OXU_CHIPIRQEN_SET, enable);
return ret;
}
treewide: setup_timer() -> timer_setup() This converts all remaining cases of the old setup_timer() API into using timer_setup(), where the callback argument is the structure already holding the struct timer_list. These should have no behavioral changes, since they just change which pointer is passed into the callback with the same available pointers after conversion. It handles the following examples, in addition to some other variations. Casting from unsigned long: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... setup_timer(&ptr->my_timer, my_callback, ptr); and forced object casts: void my_callback(struct something *ptr) { ... } ... setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr); become: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... timer_setup(&ptr->my_timer, my_callback, 0); Direct function assignments: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... ptr->my_timer.function = my_callback; have a temporary cast added, along with converting the args: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback; And finally, callbacks without a data assignment: void my_callback(unsigned long data) { ... } ... setup_timer(&ptr->my_timer, my_callback, 0); have their argument renamed to verify they're unused during conversion: void my_callback(struct timer_list *unused) { ... } ... timer_setup(&ptr->my_timer, my_callback, 0); The conversion is done with the following Coccinelle script: spatch --very-quiet --all-includes --include-headers \ -I ./arch/x86/include -I ./arch/x86/include/generated \ -I ./include -I ./arch/x86/include/uapi \ -I ./arch/x86/include/generated/uapi -I ./include/uapi \ -I ./include/generated/uapi --include ./include/linux/kconfig.h \ --dir . \ --cocci-file ~/src/data/timer_setup.cocci @fix_address_of@ expression e; @@ setup_timer( -&(e) +&e , ...) // Update any raw setup_timer() usages that have a NULL callback, but // would otherwise match change_timer_function_usage, since the latter // will update all function assignments done in the face of a NULL // function initialization in setup_timer(). @change_timer_function_usage_NULL@ expression _E; identifier _timer; type _cast_data; @@ ( -setup_timer(&_E->_timer, NULL, _E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E->_timer, NULL, (_cast_data)_E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E._timer, NULL, &_E); +timer_setup(&_E._timer, NULL, 0); | -setup_timer(&_E._timer, NULL, (_cast_data)&_E); +timer_setup(&_E._timer, NULL, 0); ) @change_timer_function_usage@ expression _E; identifier _timer; struct timer_list _stl; identifier _callback; type _cast_func, _cast_data; @@ ( -setup_timer(&_E->_timer, _callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | _E->_timer@_stl.function = _callback; | _E->_timer@_stl.function = &_callback; | _E->_timer@_stl.function = (_cast_func)_callback; | _E->_timer@_stl.function = (_cast_func)&_callback; | _E._timer@_stl.function = _callback; | _E._timer@_stl.function = &_callback; | _E._timer@_stl.function = (_cast_func)_callback; | _E._timer@_stl.function = (_cast_func)&_callback; ) // callback(unsigned long arg) @change_callback_handle_cast depends on change_timer_function_usage@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; identifier _handle; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { ( ... when != _origarg _handletype *_handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg ) } // callback(unsigned long arg) without existing variable @change_callback_handle_cast_no_arg depends on change_timer_function_usage && !change_callback_handle_cast@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { + _handletype *_origarg = from_timer(_origarg, t, _timer); + ... when != _origarg - (_handletype *)_origarg + _origarg ... when != _origarg } // Avoid already converted callbacks. @match_callback_converted depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier t; @@ void _callback(struct timer_list *t) { ... } // callback(struct something *handle) @change_callback_handle_arg depends on change_timer_function_usage && !match_callback_converted && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; @@ void _callback( -_handletype *_handle +struct timer_list *t ) { + _handletype *_handle = from_timer(_handle, t, _timer); ... } // If change_callback_handle_arg ran on an empty function, remove // the added handler. @unchange_callback_handle_arg depends on change_timer_function_usage && change_callback_handle_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; identifier t; @@ void _callback(struct timer_list *t) { - _handletype *_handle = from_timer(_handle, t, _timer); } // We only want to refactor the setup_timer() data argument if we've found // the matching callback. This undoes changes in change_timer_function_usage. @unchange_timer_function_usage depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg && !change_callback_handle_arg@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type change_timer_function_usage._cast_data; @@ ( -timer_setup(&_E->_timer, _callback, 0); +setup_timer(&_E->_timer, _callback, (_cast_data)_E); | -timer_setup(&_E._timer, _callback, 0); +setup_timer(&_E._timer, _callback, (_cast_data)&_E); ) // If we fixed a callback from a .function assignment, fix the // assignment cast now. @change_timer_function_assignment depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_func; typedef TIMER_FUNC_TYPE; @@ ( _E->_timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -&_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)_callback; +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -&_callback; +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; ) // Sometimes timer functions are called directly. Replace matched args. @change_timer_function_calls depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression _E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_data; @@ _callback( ( -(_cast_data)_E +&_E->_timer | -(_cast_data)&_E +&_E._timer | -_E +&_E->_timer ) ) // If a timer has been configured without a data argument, it can be // converted without regard to the callback argument, since it is unused. @match_timer_function_unused_data@ expression _E; identifier _timer; identifier _callback; @@ ( -setup_timer(&_E->_timer, _callback, 0); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0L); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0UL); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0L); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0UL); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_timer, _callback, 0); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0L); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0UL); +timer_setup(&_timer, _callback, 0); | -setup_timer(_timer, _callback, 0); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0L); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0UL); +timer_setup(_timer, _callback, 0); ) @change_callback_unused_data depends on match_timer_function_unused_data@ identifier match_timer_function_unused_data._callback; type _origtype; identifier _origarg; @@ void _callback( -_origtype _origarg +struct timer_list *unused ) { ... when != _origarg } Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
static void oxu_watchdog(struct timer_list *t)
{
treewide: setup_timer() -> timer_setup() This converts all remaining cases of the old setup_timer() API into using timer_setup(), where the callback argument is the structure already holding the struct timer_list. These should have no behavioral changes, since they just change which pointer is passed into the callback with the same available pointers after conversion. It handles the following examples, in addition to some other variations. Casting from unsigned long: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... setup_timer(&ptr->my_timer, my_callback, ptr); and forced object casts: void my_callback(struct something *ptr) { ... } ... setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr); become: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... timer_setup(&ptr->my_timer, my_callback, 0); Direct function assignments: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... ptr->my_timer.function = my_callback; have a temporary cast added, along with converting the args: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback; And finally, callbacks without a data assignment: void my_callback(unsigned long data) { ... } ... setup_timer(&ptr->my_timer, my_callback, 0); have their argument renamed to verify they're unused during conversion: void my_callback(struct timer_list *unused) { ... } ... timer_setup(&ptr->my_timer, my_callback, 0); The conversion is done with the following Coccinelle script: spatch --very-quiet --all-includes --include-headers \ -I ./arch/x86/include -I ./arch/x86/include/generated \ -I ./include -I ./arch/x86/include/uapi \ -I ./arch/x86/include/generated/uapi -I ./include/uapi \ -I ./include/generated/uapi --include ./include/linux/kconfig.h \ --dir . \ --cocci-file ~/src/data/timer_setup.cocci @fix_address_of@ expression e; @@ setup_timer( -&(e) +&e , ...) // Update any raw setup_timer() usages that have a NULL callback, but // would otherwise match change_timer_function_usage, since the latter // will update all function assignments done in the face of a NULL // function initialization in setup_timer(). @change_timer_function_usage_NULL@ expression _E; identifier _timer; type _cast_data; @@ ( -setup_timer(&_E->_timer, NULL, _E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E->_timer, NULL, (_cast_data)_E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E._timer, NULL, &_E); +timer_setup(&_E._timer, NULL, 0); | -setup_timer(&_E._timer, NULL, (_cast_data)&_E); +timer_setup(&_E._timer, NULL, 0); ) @change_timer_function_usage@ expression _E; identifier _timer; struct timer_list _stl; identifier _callback; type _cast_func, _cast_data; @@ ( -setup_timer(&_E->_timer, _callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | _E->_timer@_stl.function = _callback; | _E->_timer@_stl.function = &_callback; | _E->_timer@_stl.function = (_cast_func)_callback; | _E->_timer@_stl.function = (_cast_func)&_callback; | _E._timer@_stl.function = _callback; | _E._timer@_stl.function = &_callback; | _E._timer@_stl.function = (_cast_func)_callback; | _E._timer@_stl.function = (_cast_func)&_callback; ) // callback(unsigned long arg) @change_callback_handle_cast depends on change_timer_function_usage@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; identifier _handle; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { ( ... when != _origarg _handletype *_handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg ) } // callback(unsigned long arg) without existing variable @change_callback_handle_cast_no_arg depends on change_timer_function_usage && !change_callback_handle_cast@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { + _handletype *_origarg = from_timer(_origarg, t, _timer); + ... when != _origarg - (_handletype *)_origarg + _origarg ... when != _origarg } // Avoid already converted callbacks. @match_callback_converted depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier t; @@ void _callback(struct timer_list *t) { ... } // callback(struct something *handle) @change_callback_handle_arg depends on change_timer_function_usage && !match_callback_converted && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; @@ void _callback( -_handletype *_handle +struct timer_list *t ) { + _handletype *_handle = from_timer(_handle, t, _timer); ... } // If change_callback_handle_arg ran on an empty function, remove // the added handler. @unchange_callback_handle_arg depends on change_timer_function_usage && change_callback_handle_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; identifier t; @@ void _callback(struct timer_list *t) { - _handletype *_handle = from_timer(_handle, t, _timer); } // We only want to refactor the setup_timer() data argument if we've found // the matching callback. This undoes changes in change_timer_function_usage. @unchange_timer_function_usage depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg && !change_callback_handle_arg@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type change_timer_function_usage._cast_data; @@ ( -timer_setup(&_E->_timer, _callback, 0); +setup_timer(&_E->_timer, _callback, (_cast_data)_E); | -timer_setup(&_E._timer, _callback, 0); +setup_timer(&_E._timer, _callback, (_cast_data)&_E); ) // If we fixed a callback from a .function assignment, fix the // assignment cast now. @change_timer_function_assignment depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_func; typedef TIMER_FUNC_TYPE; @@ ( _E->_timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -&_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)_callback; +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -&_callback; +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; ) // Sometimes timer functions are called directly. Replace matched args. @change_timer_function_calls depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression _E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_data; @@ _callback( ( -(_cast_data)_E +&_E->_timer | -(_cast_data)&_E +&_E._timer | -_E +&_E->_timer ) ) // If a timer has been configured without a data argument, it can be // converted without regard to the callback argument, since it is unused. @match_timer_function_unused_data@ expression _E; identifier _timer; identifier _callback; @@ ( -setup_timer(&_E->_timer, _callback, 0); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0L); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0UL); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0L); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0UL); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_timer, _callback, 0); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0L); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0UL); +timer_setup(&_timer, _callback, 0); | -setup_timer(_timer, _callback, 0); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0L); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0UL); +timer_setup(_timer, _callback, 0); ) @change_callback_unused_data depends on match_timer_function_unused_data@ identifier match_timer_function_unused_data._callback; type _origtype; identifier _origarg; @@ void _callback( -_origtype _origarg +struct timer_list *unused ) { ... when != _origarg } Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
struct oxu_hcd *oxu = from_timer(oxu, t, watchdog);
unsigned long flags;
spin_lock_irqsave(&oxu->lock, flags);
/* lost IAA irqs wedge things badly; seen with a vt8235 */
if (oxu->reclaim) {
u32 status = readl(&oxu->regs->status);
if (status & STS_IAA) {
oxu_vdbg(oxu, "lost IAA\n");
writel(STS_IAA, &oxu->regs->status);
oxu->reclaim_ready = 1;
}
}
/* stop async processing after it's idled a bit */
if (test_bit(TIMER_ASYNC_OFF, &oxu->actions))
start_unlink_async(oxu, oxu->async);
/* oxu could run by timer, without IRQs ... */
ehci_work(oxu);
spin_unlock_irqrestore(&oxu->lock, flags);
}
/* One-time init, only for memory state.
*/
static int oxu_hcd_init(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
u32 temp;
int retval;
u32 hcc_params;
spin_lock_init(&oxu->lock);
treewide: setup_timer() -> timer_setup() This converts all remaining cases of the old setup_timer() API into using timer_setup(), where the callback argument is the structure already holding the struct timer_list. These should have no behavioral changes, since they just change which pointer is passed into the callback with the same available pointers after conversion. It handles the following examples, in addition to some other variations. Casting from unsigned long: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... setup_timer(&ptr->my_timer, my_callback, ptr); and forced object casts: void my_callback(struct something *ptr) { ... } ... setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr); become: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... timer_setup(&ptr->my_timer, my_callback, 0); Direct function assignments: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... ptr->my_timer.function = my_callback; have a temporary cast added, along with converting the args: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback; And finally, callbacks without a data assignment: void my_callback(unsigned long data) { ... } ... setup_timer(&ptr->my_timer, my_callback, 0); have their argument renamed to verify they're unused during conversion: void my_callback(struct timer_list *unused) { ... } ... timer_setup(&ptr->my_timer, my_callback, 0); The conversion is done with the following Coccinelle script: spatch --very-quiet --all-includes --include-headers \ -I ./arch/x86/include -I ./arch/x86/include/generated \ -I ./include -I ./arch/x86/include/uapi \ -I ./arch/x86/include/generated/uapi -I ./include/uapi \ -I ./include/generated/uapi --include ./include/linux/kconfig.h \ --dir . \ --cocci-file ~/src/data/timer_setup.cocci @fix_address_of@ expression e; @@ setup_timer( -&(e) +&e , ...) // Update any raw setup_timer() usages that have a NULL callback, but // would otherwise match change_timer_function_usage, since the latter // will update all function assignments done in the face of a NULL // function initialization in setup_timer(). @change_timer_function_usage_NULL@ expression _E; identifier _timer; type _cast_data; @@ ( -setup_timer(&_E->_timer, NULL, _E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E->_timer, NULL, (_cast_data)_E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E._timer, NULL, &_E); +timer_setup(&_E._timer, NULL, 0); | -setup_timer(&_E._timer, NULL, (_cast_data)&_E); +timer_setup(&_E._timer, NULL, 0); ) @change_timer_function_usage@ expression _E; identifier _timer; struct timer_list _stl; identifier _callback; type _cast_func, _cast_data; @@ ( -setup_timer(&_E->_timer, _callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | _E->_timer@_stl.function = _callback; | _E->_timer@_stl.function = &_callback; | _E->_timer@_stl.function = (_cast_func)_callback; | _E->_timer@_stl.function = (_cast_func)&_callback; | _E._timer@_stl.function = _callback; | _E._timer@_stl.function = &_callback; | _E._timer@_stl.function = (_cast_func)_callback; | _E._timer@_stl.function = (_cast_func)&_callback; ) // callback(unsigned long arg) @change_callback_handle_cast depends on change_timer_function_usage@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; identifier _handle; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { ( ... when != _origarg _handletype *_handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg ) } // callback(unsigned long arg) without existing variable @change_callback_handle_cast_no_arg depends on change_timer_function_usage && !change_callback_handle_cast@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { + _handletype *_origarg = from_timer(_origarg, t, _timer); + ... when != _origarg - (_handletype *)_origarg + _origarg ... when != _origarg } // Avoid already converted callbacks. @match_callback_converted depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier t; @@ void _callback(struct timer_list *t) { ... } // callback(struct something *handle) @change_callback_handle_arg depends on change_timer_function_usage && !match_callback_converted && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; @@ void _callback( -_handletype *_handle +struct timer_list *t ) { + _handletype *_handle = from_timer(_handle, t, _timer); ... } // If change_callback_handle_arg ran on an empty function, remove // the added handler. @unchange_callback_handle_arg depends on change_timer_function_usage && change_callback_handle_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; identifier t; @@ void _callback(struct timer_list *t) { - _handletype *_handle = from_timer(_handle, t, _timer); } // We only want to refactor the setup_timer() data argument if we've found // the matching callback. This undoes changes in change_timer_function_usage. @unchange_timer_function_usage depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg && !change_callback_handle_arg@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type change_timer_function_usage._cast_data; @@ ( -timer_setup(&_E->_timer, _callback, 0); +setup_timer(&_E->_timer, _callback, (_cast_data)_E); | -timer_setup(&_E._timer, _callback, 0); +setup_timer(&_E._timer, _callback, (_cast_data)&_E); ) // If we fixed a callback from a .function assignment, fix the // assignment cast now. @change_timer_function_assignment depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_func; typedef TIMER_FUNC_TYPE; @@ ( _E->_timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -&_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)_callback; +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -&_callback; +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; ) // Sometimes timer functions are called directly. Replace matched args. @change_timer_function_calls depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression _E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_data; @@ _callback( ( -(_cast_data)_E +&_E->_timer | -(_cast_data)&_E +&_E._timer | -_E +&_E->_timer ) ) // If a timer has been configured without a data argument, it can be // converted without regard to the callback argument, since it is unused. @match_timer_function_unused_data@ expression _E; identifier _timer; identifier _callback; @@ ( -setup_timer(&_E->_timer, _callback, 0); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0L); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0UL); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0L); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0UL); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_timer, _callback, 0); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0L); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0UL); +timer_setup(&_timer, _callback, 0); | -setup_timer(_timer, _callback, 0); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0L); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0UL); +timer_setup(_timer, _callback, 0); ) @change_callback_unused_data depends on match_timer_function_unused_data@ identifier match_timer_function_unused_data._callback; type _origtype; identifier _origarg; @@ void _callback( -_origtype _origarg +struct timer_list *unused ) { ... when != _origarg } Signed-off-by: Kees Cook <keescook@chromium.org>
2017-10-17 05:43:17 +08:00
timer_setup(&oxu->watchdog, oxu_watchdog, 0);
/*
* hw default: 1K periodic list heads, one per frame.
* periodic_size can shrink by USBCMD update if hcc_params allows.
*/
oxu->periodic_size = DEFAULT_I_TDPS;
retval = ehci_mem_init(oxu, GFP_KERNEL);
if (retval < 0)
return retval;
/* controllers may cache some of the periodic schedule ... */
hcc_params = readl(&oxu->caps->hcc_params);
if (HCC_ISOC_CACHE(hcc_params)) /* full frame cache */
oxu->i_thresh = 8;
else /* N microframes cached */
oxu->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
oxu->reclaim = NULL;
oxu->reclaim_ready = 0;
oxu->next_uframe = -1;
/*
* dedicate a qh for the async ring head, since we couldn't unlink
* a 'real' qh without stopping the async schedule [4.8]. use it
* as the 'reclamation list head' too.
* its dummy is used in hw_alt_next of many tds, to prevent the qh
* from automatically advancing to the next td after short reads.
*/
oxu->async->qh_next.qh = NULL;
oxu->async->hw_next = QH_NEXT(oxu->async->qh_dma);
oxu->async->hw_info1 = cpu_to_le32(QH_HEAD);
oxu->async->hw_token = cpu_to_le32(QTD_STS_HALT);
oxu->async->hw_qtd_next = EHCI_LIST_END;
oxu->async->qh_state = QH_STATE_LINKED;
oxu->async->hw_alt_next = QTD_NEXT(oxu->async->dummy->qtd_dma);
/* clear interrupt enables, set irq latency */
if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
log2_irq_thresh = 0;
temp = 1 << (16 + log2_irq_thresh);
if (HCC_CANPARK(hcc_params)) {
/* HW default park == 3, on hardware that supports it (like
* NVidia and ALI silicon), maximizes throughput on the async
* schedule by avoiding QH fetches between transfers.
*
* With fast usb storage devices and NForce2, "park" seems to
* make problems: throughput reduction (!), data errors...
*/
if (park) {
park = min(park, (unsigned) 3);
temp |= CMD_PARK;
temp |= park << 8;
}
oxu_dbg(oxu, "park %d\n", park);
}
if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
/* periodic schedule size can be smaller than default */
temp &= ~(3 << 2);
temp |= (EHCI_TUNE_FLS << 2);
}
oxu->command = temp;
return 0;
}
/* Called during probe() after chip reset completes.
*/
static int oxu_reset(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
spin_lock_init(&oxu->mem_lock);
INIT_LIST_HEAD(&oxu->urb_list);
oxu->urb_len = 0;
if (oxu->is_otg) {
oxu->caps = hcd->regs + OXU_OTG_CAP_OFFSET;
oxu->regs = hcd->regs + OXU_OTG_CAP_OFFSET + \
HC_LENGTH(readl(&oxu->caps->hc_capbase));
oxu->mem = hcd->regs + OXU_SPH_MEM;
} else {
oxu->caps = hcd->regs + OXU_SPH_CAP_OFFSET;
oxu->regs = hcd->regs + OXU_SPH_CAP_OFFSET + \
HC_LENGTH(readl(&oxu->caps->hc_capbase));
oxu->mem = hcd->regs + OXU_OTG_MEM;
}
oxu->hcs_params = readl(&oxu->caps->hcs_params);
oxu->sbrn = 0x20;
return oxu_hcd_init(hcd);
}
static int oxu_run(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
int retval;
u32 temp, hcc_params;
hcd->uses_new_polling = 1;
/* EHCI spec section 4.1 */
retval = ehci_reset(oxu);
if (retval != 0) {
ehci_mem_cleanup(oxu);
return retval;
}
writel(oxu->periodic_dma, &oxu->regs->frame_list);
writel((u32) oxu->async->qh_dma, &oxu->regs->async_next);
/* hcc_params controls whether oxu->regs->segment must (!!!)
* be used; it constrains QH/ITD/SITD and QTD locations.
* dma_pool consistent memory always uses segment zero.
* streaming mappings for I/O buffers, like pci_map_single(),
* can return segments above 4GB, if the device allows.
*
* NOTE: the dma mask is visible through dev->dma_mask, so
* drivers can pass this info along ... like NETIF_F_HIGHDMA,
* Scsi_Host.highmem_io, and so forth. It's readonly to all
* host side drivers though.
*/
hcc_params = readl(&oxu->caps->hcc_params);
if (HCC_64BIT_ADDR(hcc_params))
writel(0, &oxu->regs->segment);
oxu->command &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE |
CMD_ASE | CMD_RESET);
oxu->command |= CMD_RUN;
writel(oxu->command, &oxu->regs->command);
dbg_cmd(oxu, "init", oxu->command);
/*
* Start, enabling full USB 2.0 functionality ... usb 1.1 devices
* are explicitly handed to companion controller(s), so no TT is
* involved with the root hub. (Except where one is integrated,
* and there's no companion controller unless maybe for USB OTG.)
*/
hcd->state = HC_STATE_RUNNING;
writel(FLAG_CF, &oxu->regs->configured_flag);
readl(&oxu->regs->command); /* unblock posted writes */
temp = HC_VERSION(readl(&oxu->caps->hc_capbase));
oxu_info(oxu, "USB %x.%x started, quasi-EHCI %x.%02x, driver %s%s\n",
((oxu->sbrn & 0xf0)>>4), (oxu->sbrn & 0x0f),
temp >> 8, temp & 0xff, DRIVER_VERSION,
ignore_oc ? ", overcurrent ignored" : "");
writel(INTR_MASK, &oxu->regs->intr_enable); /* Turn On Interrupts */
return 0;
}
static void oxu_stop(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
/* Turn off port power on all root hub ports. */
ehci_port_power(oxu, 0);
/* no more interrupts ... */
del_timer_sync(&oxu->watchdog);
spin_lock_irq(&oxu->lock);
if (HC_IS_RUNNING(hcd->state))
ehci_quiesce(oxu);
ehci_reset(oxu);
writel(0, &oxu->regs->intr_enable);
spin_unlock_irq(&oxu->lock);
/* let companion controllers work when we aren't */
writel(0, &oxu->regs->configured_flag);
/* root hub is shut down separately (first, when possible) */
spin_lock_irq(&oxu->lock);
if (oxu->async)
ehci_work(oxu);
spin_unlock_irq(&oxu->lock);
ehci_mem_cleanup(oxu);
dbg_status(oxu, "oxu_stop completed", readl(&oxu->regs->status));
}
/* Kick in for silicon on any bus (not just pci, etc).
* This forcibly disables dma and IRQs, helping kexec and other cases
* where the next system software may expect clean state.
*/
static void oxu_shutdown(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
(void) ehci_halt(oxu);
ehci_turn_off_all_ports(oxu);
/* make BIOS/etc use companion controller during reboot */
writel(0, &oxu->regs->configured_flag);
/* unblock posted writes */
readl(&oxu->regs->configured_flag);
}
/* Non-error returns are a promise to giveback() the urb later
* we drop ownership so next owner (or urb unlink) can get it
*
* urb + dev is in hcd.self.controller.urb_list
* we're queueing TDs onto software and hardware lists
*
* hcd-specific init for hcpriv hasn't been done yet
*
* NOTE: control, bulk, and interrupt share the same code to append TDs
* to a (possibly active) QH, and the same QH scanning code.
*/
static int __oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
gfp_t mem_flags)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
struct list_head qtd_list;
INIT_LIST_HEAD(&qtd_list);
switch (usb_pipetype(urb->pipe)) {
case PIPE_CONTROL:
case PIPE_BULK:
default:
if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags))
return -ENOMEM;
return submit_async(oxu, urb, &qtd_list, mem_flags);
case PIPE_INTERRUPT:
if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags))
return -ENOMEM;
return intr_submit(oxu, urb, &qtd_list, mem_flags);
case PIPE_ISOCHRONOUS:
if (urb->dev->speed == USB_SPEED_HIGH)
return itd_submit(oxu, urb, mem_flags);
else
return sitd_submit(oxu, urb, mem_flags);
}
}
/* This function is responsible for breaking URBs with big data size
* into smaller size and processing small urbs in sequence.
*/
static int oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
gfp_t mem_flags)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
int num, rem;
void *transfer_buffer;
struct urb *murb;
int i, ret;
/* If not bulk pipe just enqueue the URB */
if (!usb_pipebulk(urb->pipe))
return __oxu_urb_enqueue(hcd, urb, mem_flags);
/* Otherwise we should verify the USB transfer buffer size! */
transfer_buffer = urb->transfer_buffer;
num = urb->transfer_buffer_length / 4096;
rem = urb->transfer_buffer_length % 4096;
if (rem != 0)
num++;
/* If URB is smaller than 4096 bytes just enqueue it! */
if (num == 1)
return __oxu_urb_enqueue(hcd, urb, mem_flags);
/* Ok, we have more job to do! :) */
for (i = 0; i < num - 1; i++) {
/* Get free micro URB poll till a free urb is received */
do {
murb = (struct urb *) oxu_murb_alloc(oxu);
if (!murb)
schedule();
} while (!murb);
/* Coping the urb */
memcpy(murb, urb, sizeof(struct urb));
murb->transfer_buffer_length = 4096;
murb->transfer_buffer = transfer_buffer + i * 4096;
/* Null pointer for the encodes that this is a micro urb */
murb->complete = NULL;
((struct oxu_murb *) murb)->main = urb;
((struct oxu_murb *) murb)->last = 0;
/* This loop is to guarantee urb to be processed when there's
* not enough resources at a particular time by retrying.
*/
do {
ret = __oxu_urb_enqueue(hcd, murb, mem_flags);
if (ret)
schedule();
} while (ret);
}
/* Last urb requires special handling */
/* Get free micro URB poll till a free urb is received */
do {
murb = (struct urb *) oxu_murb_alloc(oxu);
if (!murb)
schedule();
} while (!murb);
/* Coping the urb */
memcpy(murb, urb, sizeof(struct urb));
murb->transfer_buffer_length = rem > 0 ? rem : 4096;
murb->transfer_buffer = transfer_buffer + (num - 1) * 4096;
/* Null pointer for the encodes that this is a micro urb */
murb->complete = NULL;
((struct oxu_murb *) murb)->main = urb;
((struct oxu_murb *) murb)->last = 1;
do {
ret = __oxu_urb_enqueue(hcd, murb, mem_flags);
if (ret)
schedule();
} while (ret);
return ret;
}
/* Remove from hardware lists.
* Completions normally happen asynchronously
*/
static int oxu_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
struct ehci_qh *qh;
unsigned long flags;
spin_lock_irqsave(&oxu->lock, flags);
switch (usb_pipetype(urb->pipe)) {
case PIPE_CONTROL:
case PIPE_BULK:
default:
qh = (struct ehci_qh *) urb->hcpriv;
if (!qh)
break;
unlink_async(oxu, qh);
break;
case PIPE_INTERRUPT:
qh = (struct ehci_qh *) urb->hcpriv;
if (!qh)
break;
switch (qh->qh_state) {
case QH_STATE_LINKED:
intr_deschedule(oxu, qh);
/* FALL THROUGH */
case QH_STATE_IDLE:
qh_completions(oxu, qh);
break;
default:
oxu_dbg(oxu, "bogus qh %p state %d\n",
qh, qh->qh_state);
goto done;
}
/* reschedule QH iff another request is queued */
if (!list_empty(&qh->qtd_list)
&& HC_IS_RUNNING(hcd->state)) {
int status;
status = qh_schedule(oxu, qh);
spin_unlock_irqrestore(&oxu->lock, flags);
if (status != 0) {
/* shouldn't happen often, but ...
* FIXME kill those tds' urbs
*/
dev_err(hcd->self.controller,
"can't reschedule qh %p, err %d\n", qh,
status);
}
return status;
}
break;
}
done:
spin_unlock_irqrestore(&oxu->lock, flags);
return 0;
}
/* Bulk qh holds the data toggle */
static void oxu_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
unsigned long flags;
struct ehci_qh *qh, *tmp;
/* ASSERT: any requests/urbs are being unlinked */
/* ASSERT: nobody can be submitting urbs for this any more */
rescan:
spin_lock_irqsave(&oxu->lock, flags);
qh = ep->hcpriv;
if (!qh)
goto done;
/* endpoints can be iso streams. for now, we don't
* accelerate iso completions ... so spin a while.
*/
if (qh->hw_info1 == 0) {
oxu_vdbg(oxu, "iso delay\n");
goto idle_timeout;
}
if (!HC_IS_RUNNING(hcd->state))
qh->qh_state = QH_STATE_IDLE;
switch (qh->qh_state) {
case QH_STATE_LINKED:
for (tmp = oxu->async->qh_next.qh;
tmp && tmp != qh;
tmp = tmp->qh_next.qh)
continue;
/* periodic qh self-unlinks on empty */
if (!tmp)
goto nogood;
unlink_async(oxu, qh);
/* FALL THROUGH */
case QH_STATE_UNLINK: /* wait for hw to finish? */
idle_timeout:
spin_unlock_irqrestore(&oxu->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
case QH_STATE_IDLE: /* fully unlinked */
if (list_empty(&qh->qtd_list)) {
qh_put(qh);
break;
}
/* fall through */
default:
nogood:
/* caller was supposed to have unlinked any requests;
* that's not our job. just leak this memory.
*/
oxu_err(oxu, "qh %p (#%02x) state %d%s\n",
qh, ep->desc.bEndpointAddress, qh->qh_state,
list_empty(&qh->qtd_list) ? "" : "(has tds)");
break;
}
ep->hcpriv = NULL;
done:
spin_unlock_irqrestore(&oxu->lock, flags);
}
static int oxu_get_frame(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
return (readl(&oxu->regs->frame_index) >> 3) %
oxu->periodic_size;
}
/* Build "status change" packet (one or two bytes) from HC registers */
static int oxu_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
u32 temp, mask, status = 0;
int ports, i, retval = 1;
unsigned long flags;
/* if !PM, root hub timers won't get shut down ... */
if (!HC_IS_RUNNING(hcd->state))
return 0;
/* init status to no-changes */
buf[0] = 0;
ports = HCS_N_PORTS(oxu->hcs_params);
if (ports > 7) {
buf[1] = 0;
retval++;
}
/* Some boards (mostly VIA?) report bogus overcurrent indications,
* causing massive log spam unless we completely ignore them. It
* may be relevant that VIA VT8235 controllers, where PORT_POWER is
* always set, seem to clear PORT_OCC and PORT_CSC when writing to
* PORT_POWER; that's surprising, but maybe within-spec.
*/
if (!ignore_oc)
mask = PORT_CSC | PORT_PEC | PORT_OCC;
else
mask = PORT_CSC | PORT_PEC;
/* no hub change reports (bit 0) for now (power, ...) */
/* port N changes (bit N)? */
spin_lock_irqsave(&oxu->lock, flags);
for (i = 0; i < ports; i++) {
temp = readl(&oxu->regs->port_status[i]);
/*
* Return status information even for ports with OWNER set.
* Otherwise hub_wq wouldn't see the disconnect event when a
* high-speed device is switched over to the companion
* controller by the user.
*/
if (!(temp & PORT_CONNECT))
oxu->reset_done[i] = 0;
if ((temp & mask) != 0 || ((temp & PORT_RESUME) != 0 &&
time_after_eq(jiffies, oxu->reset_done[i]))) {
if (i < 7)
buf[0] |= 1 << (i + 1);
else
buf[1] |= 1 << (i - 7);
status = STS_PCD;
}
}
/* FIXME autosuspend idle root hubs */
spin_unlock_irqrestore(&oxu->lock, flags);
return status ? retval : 0;
}
/* Returns the speed of a device attached to a port on the root hub. */
static inline unsigned int oxu_port_speed(struct oxu_hcd *oxu,
unsigned int portsc)
{
switch ((portsc >> 26) & 3) {
case 0:
return 0;
case 1:
return USB_PORT_STAT_LOW_SPEED;
case 2:
default:
return USB_PORT_STAT_HIGH_SPEED;
}
}
#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
static int oxu_hub_control(struct usb_hcd *hcd, u16 typeReq,
u16 wValue, u16 wIndex, char *buf, u16 wLength)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
int ports = HCS_N_PORTS(oxu->hcs_params);
u32 __iomem *status_reg = &oxu->regs->port_status[wIndex - 1];
u32 temp, status;
unsigned long flags;
int retval = 0;
unsigned selector;
/*
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
* HCS_INDICATOR may say we can change LEDs to off/amber/green.
* (track current state ourselves) ... blink for diagnostics,
* power, "this is the one", etc. EHCI spec supports this.
*/
spin_lock_irqsave(&oxu->lock, flags);
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* no hub-wide feature/status flags */
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
temp = readl(status_reg);
/*
* Even if OWNER is set, so the port is owned by the
* companion controller, hub_wq needs to be able to clear
* the port-change status bits (especially
* USB_PORT_STAT_C_CONNECTION).
*/
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
writel(temp & ~PORT_PE, status_reg);
break;
case USB_PORT_FEAT_C_ENABLE:
writel((temp & ~PORT_RWC_BITS) | PORT_PEC, status_reg);
break;
case USB_PORT_FEAT_SUSPEND:
if (temp & PORT_RESET)
goto error;
if (temp & PORT_SUSPEND) {
if ((temp & PORT_PE) == 0)
goto error;
/* resume signaling for 20 msec */
temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
writel(temp | PORT_RESUME, status_reg);
oxu->reset_done[wIndex] = jiffies
+ msecs_to_jiffies(20);
}
break;
case USB_PORT_FEAT_C_SUSPEND:
/* we auto-clear this feature */
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC(oxu->hcs_params))
writel(temp & ~(PORT_RWC_BITS | PORT_POWER),
status_reg);
break;
case USB_PORT_FEAT_C_CONNECTION:
writel((temp & ~PORT_RWC_BITS) | PORT_CSC, status_reg);
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
writel((temp & ~PORT_RWC_BITS) | PORT_OCC, status_reg);
break;
case USB_PORT_FEAT_C_RESET:
/* GetPortStatus clears reset */
break;
default:
goto error;
}
readl(&oxu->regs->command); /* unblock posted write */
break;
case GetHubDescriptor:
ehci_hub_descriptor(oxu, (struct usb_hub_descriptor *)
buf);
break;
case GetHubStatus:
/* no hub-wide feature/status flags */
memset(buf, 0, 4);
break;
case GetPortStatus:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
status = 0;
temp = readl(status_reg);
/* wPortChange bits */
if (temp & PORT_CSC)
status |= USB_PORT_STAT_C_CONNECTION << 16;
if (temp & PORT_PEC)
status |= USB_PORT_STAT_C_ENABLE << 16;
if ((temp & PORT_OCC) && !ignore_oc)
status |= USB_PORT_STAT_C_OVERCURRENT << 16;
/* whoever resumes must GetPortStatus to complete it!! */
if (temp & PORT_RESUME) {
/* Remote Wakeup received? */
if (!oxu->reset_done[wIndex]) {
/* resume signaling for 20 msec */
oxu->reset_done[wIndex] = jiffies
+ msecs_to_jiffies(20);
/* check the port again */
mod_timer(&oxu_to_hcd(oxu)->rh_timer,
oxu->reset_done[wIndex]);
}
/* resume completed? */
else if (time_after_eq(jiffies,
oxu->reset_done[wIndex])) {
status |= USB_PORT_STAT_C_SUSPEND << 16;
oxu->reset_done[wIndex] = 0;
/* stop resume signaling */
temp = readl(status_reg);
writel(temp & ~(PORT_RWC_BITS | PORT_RESUME),
status_reg);
retval = handshake(oxu, status_reg,
PORT_RESUME, 0, 2000 /* 2msec */);
if (retval != 0) {
oxu_err(oxu,
"port %d resume error %d\n",
wIndex + 1, retval);
goto error;
}
temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
}
}
/* whoever resets must GetPortStatus to complete it!! */
if ((temp & PORT_RESET)
&& time_after_eq(jiffies,
oxu->reset_done[wIndex])) {
status |= USB_PORT_STAT_C_RESET << 16;
oxu->reset_done[wIndex] = 0;
/* force reset to complete */
writel(temp & ~(PORT_RWC_BITS | PORT_RESET),
status_reg);
/* REVISIT: some hardware needs 550+ usec to clear
* this bit; seems too long to spin routinely...
*/
retval = handshake(oxu, status_reg,
PORT_RESET, 0, 750);
if (retval != 0) {
oxu_err(oxu, "port %d reset error %d\n",
wIndex + 1, retval);
goto error;
}
/* see what we found out */
temp = check_reset_complete(oxu, wIndex, status_reg,
readl(status_reg));
}
/* transfer dedicated ports to the companion hc */
if ((temp & PORT_CONNECT) &&
test_bit(wIndex, &oxu->companion_ports)) {
temp &= ~PORT_RWC_BITS;
temp |= PORT_OWNER;
writel(temp, status_reg);
oxu_dbg(oxu, "port %d --> companion\n", wIndex + 1);
temp = readl(status_reg);
}
/*
* Even if OWNER is set, there's no harm letting hub_wq
* see the wPortStatus values (they should all be 0 except
* for PORT_POWER anyway).
*/
if (temp & PORT_CONNECT) {
status |= USB_PORT_STAT_CONNECTION;
/* status may be from integrated TT */
status |= oxu_port_speed(oxu, temp);
}
if (temp & PORT_PE)
status |= USB_PORT_STAT_ENABLE;
if (temp & (PORT_SUSPEND|PORT_RESUME))
status |= USB_PORT_STAT_SUSPEND;
if (temp & PORT_OC)
status |= USB_PORT_STAT_OVERCURRENT;
if (temp & PORT_RESET)
status |= USB_PORT_STAT_RESET;
if (temp & PORT_POWER)
status |= USB_PORT_STAT_POWER;
#ifndef OXU_VERBOSE_DEBUG
if (status & ~0xffff) /* only if wPortChange is interesting */
#endif
dbg_port(oxu, "GetStatus", wIndex + 1, temp);
put_unaligned(cpu_to_le32(status), (__le32 *) buf);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* no hub-wide feature/status flags */
break;
default:
goto error;
}
break;
case SetPortFeature:
selector = wIndex >> 8;
wIndex &= 0xff;
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
temp = readl(status_reg);
if (temp & PORT_OWNER)
break;
temp &= ~PORT_RWC_BITS;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
if ((temp & PORT_PE) == 0
|| (temp & PORT_RESET) != 0)
goto error;
if (device_may_wakeup(&hcd->self.root_hub->dev))
temp |= PORT_WAKE_BITS;
writel(temp | PORT_SUSPEND, status_reg);
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC(oxu->hcs_params))
writel(temp | PORT_POWER, status_reg);
break;
case USB_PORT_FEAT_RESET:
if (temp & PORT_RESUME)
goto error;
/* line status bits may report this as low speed,
* which can be fine if this root hub has a
* transaction translator built in.
*/
oxu_vdbg(oxu, "port %d reset\n", wIndex + 1);
temp |= PORT_RESET;
temp &= ~PORT_PE;
/*
* caller must wait, then call GetPortStatus
* usb 2.0 spec says 50 ms resets on root
*/
oxu->reset_done[wIndex] = jiffies
+ msecs_to_jiffies(50);
writel(temp, status_reg);
break;
/* For downstream facing ports (these): one hub port is put
* into test mode according to USB2 11.24.2.13, then the hub
* must be reset (which for root hub now means rmmod+modprobe,
* or else system reboot). See EHCI 2.3.9 and 4.14 for info
* about the EHCI-specific stuff.
*/
case USB_PORT_FEAT_TEST:
if (!selector || selector > 5)
goto error;
ehci_quiesce(oxu);
ehci_halt(oxu);
temp |= selector << 16;
writel(temp, status_reg);
break;
default:
goto error;
}
readl(&oxu->regs->command); /* unblock posted writes */
break;
default:
error:
/* "stall" on error */
retval = -EPIPE;
}
spin_unlock_irqrestore(&oxu->lock, flags);
return retval;
}
#ifdef CONFIG_PM
static int oxu_bus_suspend(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
int port;
int mask;
oxu_dbg(oxu, "suspend root hub\n");
if (time_before(jiffies, oxu->next_statechange))
msleep(5);
port = HCS_N_PORTS(oxu->hcs_params);
spin_lock_irq(&oxu->lock);
/* stop schedules, clean any completed work */
if (HC_IS_RUNNING(hcd->state)) {
ehci_quiesce(oxu);
hcd->state = HC_STATE_QUIESCING;
}
oxu->command = readl(&oxu->regs->command);
if (oxu->reclaim)
oxu->reclaim_ready = 1;
ehci_work(oxu);
/* Unlike other USB host controller types, EHCI doesn't have
* any notion of "global" or bus-wide suspend. The driver has
* to manually suspend all the active unsuspended ports, and
* then manually resume them in the bus_resume() routine.
*/
oxu->bus_suspended = 0;
while (port--) {
u32 __iomem *reg = &oxu->regs->port_status[port];
u32 t1 = readl(reg) & ~PORT_RWC_BITS;
u32 t2 = t1;
/* keep track of which ports we suspend */
if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) &&
!(t1 & PORT_SUSPEND)) {
t2 |= PORT_SUSPEND;
set_bit(port, &oxu->bus_suspended);
}
/* enable remote wakeup on all ports */
if (device_may_wakeup(&hcd->self.root_hub->dev))
t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E;
else
t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E);
if (t1 != t2) {
oxu_vdbg(oxu, "port %d, %08x -> %08x\n",
port + 1, t1, t2);
writel(t2, reg);
}
}
/* turn off now-idle HC */
del_timer_sync(&oxu->watchdog);
ehci_halt(oxu);
hcd->state = HC_STATE_SUSPENDED;
/* allow remote wakeup */
mask = INTR_MASK;
if (!device_may_wakeup(&hcd->self.root_hub->dev))
mask &= ~STS_PCD;
writel(mask, &oxu->regs->intr_enable);
readl(&oxu->regs->intr_enable);
oxu->next_statechange = jiffies + msecs_to_jiffies(10);
spin_unlock_irq(&oxu->lock);
return 0;
}
/* Caller has locked the root hub, and should reset/reinit on error */
static int oxu_bus_resume(struct usb_hcd *hcd)
{
struct oxu_hcd *oxu = hcd_to_oxu(hcd);
u32 temp;
int i;
if (time_before(jiffies, oxu->next_statechange))
msleep(5);
spin_lock_irq(&oxu->lock);
/* Ideally and we've got a real resume here, and no port's power
* was lost. (For PCI, that means Vaux was maintained.) But we
* could instead be restoring a swsusp snapshot -- so that BIOS was
* the last user of the controller, not reset/pm hardware keeping
* state we gave to it.
*/
temp = readl(&oxu->regs->intr_enable);
oxu_dbg(oxu, "resume root hub%s\n", temp ? "" : " after power loss");
/* at least some APM implementations will try to deliver
* IRQs right away, so delay them until we're ready.
*/
writel(0, &oxu->regs->intr_enable);
/* re-init operational registers */
writel(0, &oxu->regs->segment);
writel(oxu->periodic_dma, &oxu->regs->frame_list);
writel((u32) oxu->async->qh_dma, &oxu->regs->async_next);
/* restore CMD_RUN, framelist size, and irq threshold */
writel(oxu->command, &oxu->regs->command);
/* Some controller/firmware combinations need a delay during which
* they set up the port statuses. See Bugzilla #8190. */
mdelay(8);
/* manually resume the ports we suspended during bus_suspend() */
i = HCS_N_PORTS(oxu->hcs_params);
while (i--) {
temp = readl(&oxu->regs->port_status[i]);
temp &= ~(PORT_RWC_BITS
| PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E);
if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) {
oxu->reset_done[i] = jiffies + msecs_to_jiffies(20);
temp |= PORT_RESUME;
}
writel(temp, &oxu->regs->port_status[i]);
}
i = HCS_N_PORTS(oxu->hcs_params);
mdelay(20);
while (i--) {
temp = readl(&oxu->regs->port_status[i]);
if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) {
temp &= ~(PORT_RWC_BITS | PORT_RESUME);
writel(temp, &oxu->regs->port_status[i]);
oxu_vdbg(oxu, "resumed port %d\n", i + 1);
}
}
(void) readl(&oxu->regs->command);
/* maybe re-activate the schedule(s) */
temp = 0;
if (oxu->async->qh_next.qh)
temp |= CMD_ASE;
if (oxu->periodic_sched)
temp |= CMD_PSE;
if (temp) {
oxu->command |= temp;
writel(oxu->command, &oxu->regs->command);
}
oxu->next_statechange = jiffies + msecs_to_jiffies(5);
hcd->state = HC_STATE_RUNNING;
/* Now we can safely re-enable irqs */
writel(INTR_MASK, &oxu->regs->intr_enable);
spin_unlock_irq(&oxu->lock);
return 0;
}
#else
static int oxu_bus_suspend(struct usb_hcd *hcd)
{
return 0;
}
static int oxu_bus_resume(struct usb_hcd *hcd)
{
return 0;
}
#endif /* CONFIG_PM */
static const struct hc_driver oxu_hc_driver = {
.description = "oxu210hp_hcd",
.product_desc = "oxu210hp HCD",
.hcd_priv_size = sizeof(struct oxu_hcd),
/*
* Generic hardware linkage
*/
.irq = oxu_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* Basic lifecycle operations
*/
.reset = oxu_reset,
.start = oxu_run,
.stop = oxu_stop,
.shutdown = oxu_shutdown,
/*
* Managing i/o requests and associated device resources
*/
.urb_enqueue = oxu_urb_enqueue,
.urb_dequeue = oxu_urb_dequeue,
.endpoint_disable = oxu_endpoint_disable,
/*
* Scheduling support
*/
.get_frame_number = oxu_get_frame,
/*
* Root hub support
*/
.hub_status_data = oxu_hub_status_data,
.hub_control = oxu_hub_control,
.bus_suspend = oxu_bus_suspend,
.bus_resume = oxu_bus_resume,
};
/*
* Module stuff
*/
static void oxu_configuration(struct platform_device *pdev, void __iomem *base)
{
u32 tmp;
/* Initialize top level registers.
* First write ever
*/
oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D);
oxu_writel(base, OXU_SOFTRESET, OXU_SRESET);
oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D);
tmp = oxu_readl(base, OXU_PIOBURSTREADCTRL);
oxu_writel(base, OXU_PIOBURSTREADCTRL, tmp | 0x0040);
oxu_writel(base, OXU_ASO, OXU_SPHPOEN | OXU_OVRCCURPUPDEN |
OXU_COMPARATOR | OXU_ASO_OP);
tmp = oxu_readl(base, OXU_CLKCTRL_SET);
oxu_writel(base, OXU_CLKCTRL_SET, tmp | OXU_SYSCLKEN | OXU_USBOTGCLKEN);
/* Clear all top interrupt enable */
oxu_writel(base, OXU_CHIPIRQEN_CLR, 0xff);
/* Clear all top interrupt status */
oxu_writel(base, OXU_CHIPIRQSTATUS, 0xff);
/* Enable all needed top interrupt except OTG SPH core */
oxu_writel(base, OXU_CHIPIRQEN_SET, OXU_USBSPHLPWUI | OXU_USBOTGLPWUI);
}
static int oxu_verify_id(struct platform_device *pdev, void __iomem *base)
{
u32 id;
static const char * const bo[] = {
"reserved",
"128-pin LQFP",
"84-pin TFBGA",
"reserved",
};
/* Read controller signature register to find a match */
id = oxu_readl(base, OXU_DEVICEID);
dev_info(&pdev->dev, "device ID %x\n", id);
if ((id & OXU_REV_MASK) != (OXU_REV_2100 << OXU_REV_SHIFT))
return -1;
dev_info(&pdev->dev, "found device %x %s (%04x:%04x)\n",
id >> OXU_REV_SHIFT,
bo[(id & OXU_BO_MASK) >> OXU_BO_SHIFT],
(id & OXU_MAJ_REV_MASK) >> OXU_MAJ_REV_SHIFT,
(id & OXU_MIN_REV_MASK) >> OXU_MIN_REV_SHIFT);
return 0;
}
static const struct hc_driver oxu_hc_driver;
static struct usb_hcd *oxu_create(struct platform_device *pdev,
unsigned long memstart, unsigned long memlen,
void __iomem *base, int irq, int otg)
{
struct device *dev = &pdev->dev;
struct usb_hcd *hcd;
struct oxu_hcd *oxu;
int ret;
/* Set endian mode and host mode */
oxu_writel(base + (otg ? OXU_OTG_CORE_OFFSET : OXU_SPH_CORE_OFFSET),
OXU_USBMODE,
OXU_CM_HOST_ONLY | OXU_ES_LITTLE | OXU_VBPS);
hcd = usb_create_hcd(&oxu_hc_driver, dev,
otg ? "oxu210hp_otg" : "oxu210hp_sph");
if (!hcd)
return ERR_PTR(-ENOMEM);
hcd->rsrc_start = memstart;
hcd->rsrc_len = memlen;
hcd->regs = base;
hcd->irq = irq;
hcd->state = HC_STATE_HALT;
oxu = hcd_to_oxu(hcd);
oxu->is_otg = otg;
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret < 0)
return ERR_PTR(ret);
device_wakeup_enable(hcd->self.controller);
return hcd;
}
static int oxu_init(struct platform_device *pdev,
unsigned long memstart, unsigned long memlen,
void __iomem *base, int irq)
{
struct oxu_info *info = platform_get_drvdata(pdev);
struct usb_hcd *hcd;
int ret;
/* First time configuration at start up */
oxu_configuration(pdev, base);
ret = oxu_verify_id(pdev, base);
if (ret) {
dev_err(&pdev->dev, "no devices found!\n");
return -ENODEV;
}
/* Create the OTG controller */
hcd = oxu_create(pdev, memstart, memlen, base, irq, 1);
if (IS_ERR(hcd)) {
dev_err(&pdev->dev, "cannot create OTG controller!\n");
ret = PTR_ERR(hcd);
goto error_create_otg;
}
info->hcd[0] = hcd;
/* Create the SPH host controller */
hcd = oxu_create(pdev, memstart, memlen, base, irq, 0);
if (IS_ERR(hcd)) {
dev_err(&pdev->dev, "cannot create SPH controller!\n");
ret = PTR_ERR(hcd);
goto error_create_sph;
}
info->hcd[1] = hcd;
oxu_writel(base, OXU_CHIPIRQEN_SET,
oxu_readl(base, OXU_CHIPIRQEN_SET) | 3);
return 0;
error_create_sph:
usb_remove_hcd(info->hcd[0]);
usb_put_hcd(info->hcd[0]);
error_create_otg:
return ret;
}
static int oxu_drv_probe(struct platform_device *pdev)
{
struct resource *res;
void __iomem *base;
unsigned long memstart, memlen;
int irq, ret;
struct oxu_info *info;
if (usb_disabled())
return -ENODEV;
/*
* Get the platform resources
*/
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(&pdev->dev,
"no IRQ! Check %s setup!\n", dev_name(&pdev->dev));
return -ENODEV;
}
irq = res->start;
dev_dbg(&pdev->dev, "IRQ resource %d\n", irq);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
goto error;
}
memstart = res->start;
memlen = resource_size(res);
ret = irq_set_irq_type(irq, IRQF_TRIGGER_FALLING);
if (ret) {
dev_err(&pdev->dev, "error setting irq type\n");
ret = -EFAULT;
goto error;
}
/* Allocate a driver data struct to hold useful info for both
* SPH & OTG devices
*/
info = devm_kzalloc(&pdev->dev, sizeof(struct oxu_info), GFP_KERNEL);
if (!info) {
ret = -EFAULT;
goto error;
}
platform_set_drvdata(pdev, info);
ret = oxu_init(pdev, memstart, memlen, base, irq);
if (ret < 0) {
dev_dbg(&pdev->dev, "cannot init USB devices\n");
goto error;
}
dev_info(&pdev->dev, "devices enabled and running\n");
platform_set_drvdata(pdev, info);
return 0;
error:
dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
return ret;
}
static void oxu_remove(struct platform_device *pdev, struct usb_hcd *hcd)
{
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
}
static int oxu_drv_remove(struct platform_device *pdev)
{
struct oxu_info *info = platform_get_drvdata(pdev);
oxu_remove(pdev, info->hcd[0]);
oxu_remove(pdev, info->hcd[1]);
return 0;
}
static void oxu_drv_shutdown(struct platform_device *pdev)
{
oxu_drv_remove(pdev);
}
#if 0
/* FIXME: TODO */
static int oxu_drv_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
return 0;
}
static int oxu_drv_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
return 0;
}
#else
#define oxu_drv_suspend NULL
#define oxu_drv_resume NULL
#endif
static struct platform_driver oxu_driver = {
.probe = oxu_drv_probe,
.remove = oxu_drv_remove,
.shutdown = oxu_drv_shutdown,
.suspend = oxu_drv_suspend,
.resume = oxu_drv_resume,
.driver = {
.name = "oxu210hp-hcd",
.bus = &platform_bus_type
}
};
module_platform_driver(oxu_driver);
MODULE_DESCRIPTION("Oxford OXU210HP HCD driver - ver. " DRIVER_VERSION);
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_LICENSE("GPL");