linux/drivers/usb/chipidea/udc.c

1790 lines
43 KiB
C
Raw Normal View History

/*
* udc.c - ChipIdea UDC driver
*
* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
*
* Author: David Lopo
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/err.h>
#include <linux/irqreturn.h>
#include <linux/kernel.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/usb/chipidea.h>
#include "ci.h"
#include "udc.h"
#include "bits.h"
#include "debug.h"
/* control endpoint description */
static const struct usb_endpoint_descriptor
ctrl_endpt_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
.wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
};
static const struct usb_endpoint_descriptor
ctrl_endpt_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
.wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
};
/**
* hw_ep_bit: calculates the bit number
* @num: endpoint number
* @dir: endpoint direction
*
* This function returns bit number
*/
static inline int hw_ep_bit(int num, int dir)
{
return num + (dir ? 16 : 0);
}
static inline int ep_to_bit(struct ci13xxx *ci, int n)
{
int fill = 16 - ci->hw_ep_max / 2;
if (n >= ci->hw_ep_max / 2)
n += fill;
return n;
}
/**
* hw_device_state: enables/disables interrupts (execute without interruption)
* @dma: 0 => disable, !0 => enable and set dma engine
*
* This function returns an error code
*/
static int hw_device_state(struct ci13xxx *ci, u32 dma)
{
if (dma) {
hw_write(ci, OP_ENDPTLISTADDR, ~0, dma);
/* interrupt, error, port change, reset, sleep/suspend */
hw_write(ci, OP_USBINTR, ~0,
USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
} else {
hw_write(ci, OP_USBINTR, ~0, 0);
}
return 0;
}
/**
* hw_ep_flush: flush endpoint fifo (execute without interruption)
* @num: endpoint number
* @dir: endpoint direction
*
* This function returns an error code
*/
static int hw_ep_flush(struct ci13xxx *ci, int num, int dir)
{
int n = hw_ep_bit(num, dir);
do {
/* flush any pending transfer */
hw_write(ci, OP_ENDPTFLUSH, BIT(n), BIT(n));
while (hw_read(ci, OP_ENDPTFLUSH, BIT(n)))
cpu_relax();
} while (hw_read(ci, OP_ENDPTSTAT, BIT(n)));
return 0;
}
/**
* hw_ep_disable: disables endpoint (execute without interruption)
* @num: endpoint number
* @dir: endpoint direction
*
* This function returns an error code
*/
static int hw_ep_disable(struct ci13xxx *ci, int num, int dir)
{
hw_ep_flush(ci, num, dir);
hw_write(ci, OP_ENDPTCTRL + num,
dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
return 0;
}
/**
* hw_ep_enable: enables endpoint (execute without interruption)
* @num: endpoint number
* @dir: endpoint direction
* @type: endpoint type
*
* This function returns an error code
*/
static int hw_ep_enable(struct ci13xxx *ci, int num, int dir, int type)
{
u32 mask, data;
if (dir) {
mask = ENDPTCTRL_TXT; /* type */
data = type << __ffs(mask);
mask |= ENDPTCTRL_TXS; /* unstall */
mask |= ENDPTCTRL_TXR; /* reset data toggle */
data |= ENDPTCTRL_TXR;
mask |= ENDPTCTRL_TXE; /* enable */
data |= ENDPTCTRL_TXE;
} else {
mask = ENDPTCTRL_RXT; /* type */
data = type << __ffs(mask);
mask |= ENDPTCTRL_RXS; /* unstall */
mask |= ENDPTCTRL_RXR; /* reset data toggle */
data |= ENDPTCTRL_RXR;
mask |= ENDPTCTRL_RXE; /* enable */
data |= ENDPTCTRL_RXE;
}
hw_write(ci, OP_ENDPTCTRL + num, mask, data);
return 0;
}
/**
* hw_ep_get_halt: return endpoint halt status
* @num: endpoint number
* @dir: endpoint direction
*
* This function returns 1 if endpoint halted
*/
static int hw_ep_get_halt(struct ci13xxx *ci, int num, int dir)
{
u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0;
}
/**
* hw_test_and_clear_setup_status: test & clear setup status (execute without
* interruption)
* @n: endpoint number
*
* This function returns setup status
*/
static int hw_test_and_clear_setup_status(struct ci13xxx *ci, int n)
{
n = ep_to_bit(ci, n);
return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n));
}
/**
* hw_ep_prime: primes endpoint (execute without interruption)
* @num: endpoint number
* @dir: endpoint direction
* @is_ctrl: true if control endpoint
*
* This function returns an error code
*/
static int hw_ep_prime(struct ci13xxx *ci, int num, int dir, int is_ctrl)
{
int n = hw_ep_bit(num, dir);
if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
return -EAGAIN;
hw_write(ci, OP_ENDPTPRIME, BIT(n), BIT(n));
while (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
cpu_relax();
if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
return -EAGAIN;
/* status shoult be tested according with manual but it doesn't work */
return 0;
}
/**
* hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
* without interruption)
* @num: endpoint number
* @dir: endpoint direction
* @value: true => stall, false => unstall
*
* This function returns an error code
*/
static int hw_ep_set_halt(struct ci13xxx *ci, int num, int dir, int value)
{
if (value != 0 && value != 1)
return -EINVAL;
do {
enum ci13xxx_regs reg = OP_ENDPTCTRL + num;
u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
/* data toggle - reserved for EP0 but it's in ESS */
hw_write(ci, reg, mask_xs|mask_xr,
value ? mask_xs : mask_xr);
} while (value != hw_ep_get_halt(ci, num, dir));
return 0;
}
/**
* hw_is_port_high_speed: test if port is high speed
*
* This function returns true if high speed port
*/
static int hw_port_is_high_speed(struct ci13xxx *ci)
{
return ci->hw_bank.lpm ? hw_read(ci, OP_DEVLC, DEVLC_PSPD) :
hw_read(ci, OP_PORTSC, PORTSC_HSP);
}
/**
* hw_read_intr_enable: returns interrupt enable register
*
* This function returns register data
*/
static u32 hw_read_intr_enable(struct ci13xxx *ci)
{
return hw_read(ci, OP_USBINTR, ~0);
}
/**
* hw_read_intr_status: returns interrupt status register
*
* This function returns register data
*/
static u32 hw_read_intr_status(struct ci13xxx *ci)
{
return hw_read(ci, OP_USBSTS, ~0);
}
/**
* hw_test_and_clear_complete: test & clear complete status (execute without
* interruption)
* @n: endpoint number
*
* This function returns complete status
*/
static int hw_test_and_clear_complete(struct ci13xxx *ci, int n)
{
n = ep_to_bit(ci, n);
return hw_test_and_clear(ci, OP_ENDPTCOMPLETE, BIT(n));
}
/**
* hw_test_and_clear_intr_active: test & clear active interrupts (execute
* without interruption)
*
* This function returns active interrutps
*/
static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci)
{
u32 reg = hw_read_intr_status(ci) & hw_read_intr_enable(ci);
hw_write(ci, OP_USBSTS, ~0, reg);
return reg;
}
/**
* hw_test_and_clear_setup_guard: test & clear setup guard (execute without
* interruption)
*
* This function returns guard value
*/
static int hw_test_and_clear_setup_guard(struct ci13xxx *ci)
{
return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, 0);
}
/**
* hw_test_and_set_setup_guard: test & set setup guard (execute without
* interruption)
*
* This function returns guard value
*/
static int hw_test_and_set_setup_guard(struct ci13xxx *ci)
{
return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
}
/**
* hw_usb_set_address: configures USB address (execute without interruption)
* @value: new USB address
*
* This function explicitly sets the address, without the "USBADRA" (advance)
* feature, which is not supported by older versions of the controller.
*/
static void hw_usb_set_address(struct ci13xxx *ci, u8 value)
{
hw_write(ci, OP_DEVICEADDR, DEVICEADDR_USBADR,
value << __ffs(DEVICEADDR_USBADR));
}
/**
* hw_usb_reset: restart device after a bus reset (execute without
* interruption)
*
* This function returns an error code
*/
static int hw_usb_reset(struct ci13xxx *ci)
{
hw_usb_set_address(ci, 0);
/* ESS flushes only at end?!? */
hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
/* clear setup token semaphores */
hw_write(ci, OP_ENDPTSETUPSTAT, 0, 0);
/* clear complete status */
hw_write(ci, OP_ENDPTCOMPLETE, 0, 0);
/* wait until all bits cleared */
while (hw_read(ci, OP_ENDPTPRIME, ~0))
udelay(10); /* not RTOS friendly */
/* reset all endpoints ? */
/* reset internal status and wait for further instructions
no need to verify the port reset status (ESS does it) */
return 0;
}
/******************************************************************************
* UTIL block
*****************************************************************************/
/**
* _usb_addr: calculates endpoint address from direction & number
* @ep: endpoint
*/
static inline u8 _usb_addr(struct ci13xxx_ep *ep)
{
return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
}
/**
* _hardware_queue: configures a request at hardware level
* @gadget: gadget
* @mEp: endpoint
*
* This function returns an error code
*/
static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
{
struct ci13xxx *ci = mEp->ci;
unsigned i;
int ret = 0;
unsigned length = mReq->req.length;
/* don't queue twice */
if (mReq->req.status == -EALREADY)
return -EALREADY;
mReq->req.status = -EALREADY;
if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
&mReq->zdma);
if (mReq->zptr == NULL)
return -ENOMEM;
memset(mReq->zptr, 0, sizeof(*mReq->zptr));
mReq->zptr->next = cpu_to_le32(TD_TERMINATE);
mReq->zptr->token = cpu_to_le32(TD_STATUS_ACTIVE);
if (!mReq->req.no_interrupt)
mReq->zptr->token |= cpu_to_le32(TD_IOC);
}
ret = usb_gadget_map_request(&ci->gadget, &mReq->req, mEp->dir);
if (ret)
return ret;
/*
* TD configuration
* TODO - handle requests which spawns into several TDs
*/
memset(mReq->ptr, 0, sizeof(*mReq->ptr));
mReq->ptr->token = cpu_to_le32(length << __ffs(TD_TOTAL_BYTES));
mReq->ptr->token &= cpu_to_le32(TD_TOTAL_BYTES);
mReq->ptr->token |= cpu_to_le32(TD_STATUS_ACTIVE);
if (mReq->zptr) {
mReq->ptr->next = cpu_to_le32(mReq->zdma);
} else {
mReq->ptr->next = cpu_to_le32(TD_TERMINATE);
if (!mReq->req.no_interrupt)
mReq->ptr->token |= cpu_to_le32(TD_IOC);
}
mReq->ptr->page[0] = cpu_to_le32(mReq->req.dma);
for (i = 1; i < 5; i++) {
u32 page = mReq->req.dma + i * CI13XXX_PAGE_SIZE;
page &= ~TD_RESERVED_MASK;
mReq->ptr->page[i] = cpu_to_le32(page);
}
if (!list_empty(&mEp->qh.queue)) {
struct ci13xxx_req *mReqPrev;
int n = hw_ep_bit(mEp->num, mEp->dir);
int tmp_stat;
u32 next = mReq->dma & TD_ADDR_MASK;
mReqPrev = list_entry(mEp->qh.queue.prev,
struct ci13xxx_req, queue);
if (mReqPrev->zptr)
mReqPrev->zptr->next = cpu_to_le32(next);
else
mReqPrev->ptr->next = cpu_to_le32(next);
wmb();
if (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
goto done;
do {
hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n));
} while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW));
hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0);
if (tmp_stat)
goto done;
}
/* QH configuration */
mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */
mEp->qh.ptr->td.token &=
cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE));
mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT);
wmb(); /* synchronize before ep prime */
ret = hw_ep_prime(ci, mEp->num, mEp->dir,
mEp->type == USB_ENDPOINT_XFER_CONTROL);
done:
return ret;
}
/**
* _hardware_dequeue: handles a request at hardware level
* @gadget: gadget
* @mEp: endpoint
*
* This function returns an error code
*/
static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
{
if (mReq->req.status != -EALREADY)
return -EINVAL;
if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->ptr->token) != 0)
return -EBUSY;
if (mReq->zptr) {
if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->zptr->token) != 0)
return -EBUSY;
dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
mReq->zptr = NULL;
}
mReq->req.status = 0;
usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir);
mReq->req.status = le32_to_cpu(mReq->ptr->token) & TD_STATUS;
if ((TD_STATUS_HALTED & mReq->req.status) != 0)
mReq->req.status = -1;
else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
mReq->req.status = -1;
else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
mReq->req.status = -1;
mReq->req.actual = le32_to_cpu(mReq->ptr->token) & TD_TOTAL_BYTES;
mReq->req.actual >>= __ffs(TD_TOTAL_BYTES);
mReq->req.actual = mReq->req.length - mReq->req.actual;
mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
return mReq->req.actual;
}
/**
* _ep_nuke: dequeues all endpoint requests
* @mEp: endpoint
*
* This function returns an error code
* Caller must hold lock
*/
static int _ep_nuke(struct ci13xxx_ep *mEp)
__releases(mEp->lock)
__acquires(mEp->lock)
{
if (mEp == NULL)
return -EINVAL;
hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
while (!list_empty(&mEp->qh.queue)) {
/* pop oldest request */
struct ci13xxx_req *mReq = \
list_entry(mEp->qh.queue.next,
struct ci13xxx_req, queue);
list_del_init(&mReq->queue);
mReq->req.status = -ESHUTDOWN;
if (mReq->req.complete != NULL) {
spin_unlock(mEp->lock);
mReq->req.complete(&mEp->ep, &mReq->req);
spin_lock(mEp->lock);
}
}
return 0;
}
/**
* _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
* @gadget: gadget
*
* This function returns an error code
*/
static int _gadget_stop_activity(struct usb_gadget *gadget)
{
struct usb_ep *ep;
struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
unsigned long flags;
spin_lock_irqsave(&ci->lock, flags);
ci->gadget.speed = USB_SPEED_UNKNOWN;
ci->remote_wakeup = 0;
ci->suspended = 0;
spin_unlock_irqrestore(&ci->lock, flags);
/* flush all endpoints */
gadget_for_each_ep(ep, gadget) {
usb_ep_fifo_flush(ep);
}
usb_ep_fifo_flush(&ci->ep0out->ep);
usb_ep_fifo_flush(&ci->ep0in->ep);
if (ci->driver)
ci->driver->disconnect(gadget);
/* make sure to disable all endpoints */
gadget_for_each_ep(ep, gadget) {
usb_ep_disable(ep);
}
if (ci->status != NULL) {
usb_ep_free_request(&ci->ep0in->ep, ci->status);
ci->status = NULL;
}
return 0;
}
/******************************************************************************
* ISR block
*****************************************************************************/
/**
* isr_reset_handler: USB reset interrupt handler
* @ci: UDC device
*
* This function resets USB engine after a bus reset occurred
*/
static void isr_reset_handler(struct ci13xxx *ci)
__releases(ci->lock)
__acquires(ci->lock)
{
int retval;
spin_unlock(&ci->lock);
retval = _gadget_stop_activity(&ci->gadget);
if (retval)
goto done;
retval = hw_usb_reset(ci);
if (retval)
goto done;
ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC);
if (ci->status == NULL)
retval = -ENOMEM;
done:
spin_lock(&ci->lock);
if (retval)
dev_err(ci->dev, "error: %i\n", retval);
}
/**
* isr_get_status_complete: get_status request complete function
* @ep: endpoint
* @req: request handled
*
* Caller must release lock
*/
static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
{
if (ep == NULL || req == NULL)
return;
kfree(req->buf);
usb_ep_free_request(ep, req);
}
/**
* isr_get_status_response: get_status request response
* @ci: ci struct
* @setup: setup request packet
*
* This function returns an error code
*/
static int isr_get_status_response(struct ci13xxx *ci,
struct usb_ctrlrequest *setup)
__releases(mEp->lock)
__acquires(mEp->lock)
{
struct ci13xxx_ep *mEp = ci->ep0in;
struct usb_request *req = NULL;
gfp_t gfp_flags = GFP_ATOMIC;
int dir, num, retval;
if (mEp == NULL || setup == NULL)
return -EINVAL;
spin_unlock(mEp->lock);
req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
spin_lock(mEp->lock);
if (req == NULL)
return -ENOMEM;
req->complete = isr_get_status_complete;
req->length = 2;
req->buf = kzalloc(req->length, gfp_flags);
if (req->buf == NULL) {
retval = -ENOMEM;
goto err_free_req;
}
if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
/* Assume that device is bus powered for now. */
*(u16 *)req->buf = ci->remote_wakeup << 1;
retval = 0;
} else if ((setup->bRequestType & USB_RECIP_MASK) \
== USB_RECIP_ENDPOINT) {
dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
TX : RX;
num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
*(u16 *)req->buf = hw_ep_get_halt(ci, num, dir);
}
/* else do nothing; reserved for future use */
spin_unlock(mEp->lock);
retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
spin_lock(mEp->lock);
if (retval)
goto err_free_buf;
return 0;
err_free_buf:
kfree(req->buf);
err_free_req:
spin_unlock(mEp->lock);
usb_ep_free_request(&mEp->ep, req);
spin_lock(mEp->lock);
return retval;
}
/**
* isr_setup_status_complete: setup_status request complete function
* @ep: endpoint
* @req: request handled
*
* Caller must release lock. Put the port in test mode if test mode
* feature is selected.
*/
static void
isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
{
struct ci13xxx *ci = req->context;
unsigned long flags;
if (ci->setaddr) {
hw_usb_set_address(ci, ci->address);
ci->setaddr = false;
}
spin_lock_irqsave(&ci->lock, flags);
if (ci->test_mode)
hw_port_test_set(ci, ci->test_mode);
spin_unlock_irqrestore(&ci->lock, flags);
}
/**
* isr_setup_status_phase: queues the status phase of a setup transation
* @ci: ci struct
*
* This function returns an error code
*/
static int isr_setup_status_phase(struct ci13xxx *ci)
__releases(mEp->lock)
__acquires(mEp->lock)
{
int retval;
struct ci13xxx_ep *mEp;
mEp = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in;
ci->status->context = ci;
ci->status->complete = isr_setup_status_complete;
spin_unlock(mEp->lock);
retval = usb_ep_queue(&mEp->ep, ci->status, GFP_ATOMIC);
spin_lock(mEp->lock);
return retval;
}
/**
* isr_tr_complete_low: transaction complete low level handler
* @mEp: endpoint
*
* This function returns an error code
* Caller must hold lock
*/
static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
__releases(mEp->lock)
__acquires(mEp->lock)
{
struct ci13xxx_req *mReq, *mReqTemp;
struct ci13xxx_ep *mEpTemp = mEp;
int retval = 0;
list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
queue) {
retval = _hardware_dequeue(mEp, mReq);
if (retval < 0)
break;
list_del_init(&mReq->queue);
if (mReq->req.complete != NULL) {
spin_unlock(mEp->lock);
if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
mReq->req.length)
mEpTemp = mEp->ci->ep0in;
mReq->req.complete(&mEpTemp->ep, &mReq->req);
spin_lock(mEp->lock);
}
}
if (retval == -EBUSY)
retval = 0;
return retval;
}
/**
* isr_tr_complete_handler: transaction complete interrupt handler
* @ci: UDC descriptor
*
* This function handles traffic events
*/
static void isr_tr_complete_handler(struct ci13xxx *ci)
__releases(ci->lock)
__acquires(ci->lock)
{
unsigned i;
u8 tmode = 0;
for (i = 0; i < ci->hw_ep_max; i++) {
struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
int type, num, dir, err = -EINVAL;
struct usb_ctrlrequest req;
if (mEp->ep.desc == NULL)
continue; /* not configured */
if (hw_test_and_clear_complete(ci, i)) {
err = isr_tr_complete_low(mEp);
if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
if (err > 0) /* needs status phase */
err = isr_setup_status_phase(ci);
if (err < 0) {
spin_unlock(&ci->lock);
if (usb_ep_set_halt(&mEp->ep))
dev_err(ci->dev,
"error: ep_set_halt\n");
spin_lock(&ci->lock);
}
}
}
if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
!hw_test_and_clear_setup_status(ci, i))
continue;
if (i != 0) {
dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i);
continue;
}
/*
* Flush data and handshake transactions of previous
* setup packet.
*/
_ep_nuke(ci->ep0out);
_ep_nuke(ci->ep0in);
/* read_setup_packet */
do {
hw_test_and_set_setup_guard(ci);
memcpy(&req, &mEp->qh.ptr->setup, sizeof(req));
} while (!hw_test_and_clear_setup_guard(ci));
type = req.bRequestType;
ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
switch (req.bRequest) {
case USB_REQ_CLEAR_FEATURE:
if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
le16_to_cpu(req.wValue) ==
USB_ENDPOINT_HALT) {
if (req.wLength != 0)
break;
num = le16_to_cpu(req.wIndex);
dir = num & USB_ENDPOINT_DIR_MASK;
num &= USB_ENDPOINT_NUMBER_MASK;
if (dir) /* TX */
num += ci->hw_ep_max/2;
if (!ci->ci13xxx_ep[num].wedge) {
spin_unlock(&ci->lock);
err = usb_ep_clear_halt(
&ci->ci13xxx_ep[num].ep);
spin_lock(&ci->lock);
if (err)
break;
}
err = isr_setup_status_phase(ci);
} else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
le16_to_cpu(req.wValue) ==
USB_DEVICE_REMOTE_WAKEUP) {
if (req.wLength != 0)
break;
ci->remote_wakeup = 0;
err = isr_setup_status_phase(ci);
} else {
goto delegate;
}
break;
case USB_REQ_GET_STATUS:
if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
type != (USB_DIR_IN|USB_RECIP_INTERFACE))
goto delegate;
if (le16_to_cpu(req.wLength) != 2 ||
le16_to_cpu(req.wValue) != 0)
break;
err = isr_get_status_response(ci, &req);
break;
case USB_REQ_SET_ADDRESS:
if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
goto delegate;
if (le16_to_cpu(req.wLength) != 0 ||
le16_to_cpu(req.wIndex) != 0)
break;
ci->address = (u8)le16_to_cpu(req.wValue);
ci->setaddr = true;
err = isr_setup_status_phase(ci);
break;
case USB_REQ_SET_FEATURE:
if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
le16_to_cpu(req.wValue) ==
USB_ENDPOINT_HALT) {
if (req.wLength != 0)
break;
num = le16_to_cpu(req.wIndex);
dir = num & USB_ENDPOINT_DIR_MASK;
num &= USB_ENDPOINT_NUMBER_MASK;
if (dir) /* TX */
num += ci->hw_ep_max/2;
spin_unlock(&ci->lock);
err = usb_ep_set_halt(&ci->ci13xxx_ep[num].ep);
spin_lock(&ci->lock);
if (!err)
isr_setup_status_phase(ci);
} else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
if (req.wLength != 0)
break;
switch (le16_to_cpu(req.wValue)) {
case USB_DEVICE_REMOTE_WAKEUP:
ci->remote_wakeup = 1;
err = isr_setup_status_phase(ci);
break;
case USB_DEVICE_TEST_MODE:
tmode = le16_to_cpu(req.wIndex) >> 8;
switch (tmode) {
case TEST_J:
case TEST_K:
case TEST_SE0_NAK:
case TEST_PACKET:
case TEST_FORCE_EN:
ci->test_mode = tmode;
err = isr_setup_status_phase(
ci);
break;
default:
break;
}
default:
goto delegate;
}
} else {
goto delegate;
}
break;
default:
delegate:
if (req.wLength == 0) /* no data phase */
ci->ep0_dir = TX;
spin_unlock(&ci->lock);
err = ci->driver->setup(&ci->gadget, &req);
spin_lock(&ci->lock);
break;
}
if (err < 0) {
spin_unlock(&ci->lock);
if (usb_ep_set_halt(&mEp->ep))
dev_err(ci->dev, "error: ep_set_halt\n");
spin_lock(&ci->lock);
}
}
}
/******************************************************************************
* ENDPT block
*****************************************************************************/
/**
* ep_enable: configure endpoint, making it usable
*
* Check usb_ep_enable() at "usb_gadget.h" for details
*/
static int ep_enable(struct usb_ep *ep,
const struct usb_endpoint_descriptor *desc)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
int retval = 0;
unsigned long flags;
u32 cap = 0;
if (ep == NULL || desc == NULL)
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
/* only internal SW should enable ctrl endpts */
mEp->ep.desc = desc;
if (!list_empty(&mEp->qh.queue))
dev_warn(mEp->ci->dev, "enabling a non-empty endpoint!\n");
mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
mEp->num = usb_endpoint_num(desc);
mEp->type = usb_endpoint_type(desc);
USB: use usb_endpoint_maxp() instead of le16_to_cpu() Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size instead of le16_to_cpu(desc->wMaxPacketSize). This patch fix it up Cc: Armin Fuerst <fuerst@in.tum.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: Johannes Erdfelt <johannes@erdfelt.com> Cc: Vojtech Pavlik <vojtech@suse.cz> Cc: Oliver Neukum <oliver@neukum.name> Cc: David Kubicek <dave@awk.cz> Cc: Johan Hovold <jhovold@gmail.com> Cc: Brad Hards <bhards@bigpond.net.au> Acked-by: Felipe Balbi <balbi@ti.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de> Cc: David Brownell <david-b@pacbell.net> Cc: David Lopo <dlopo@chipidea.mips.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Xie Xiaobo <X.Xie@freescale.com> Cc: Li Yang <leoli@freescale.com> Cc: Jiang Bo <tanya.jiang@freescale.com> Cc: Yuan-hsin Chen <yhchen@faraday-tech.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Ben Dooks <ben@simtec.co.uk> Cc: Thomas Abraham <thomas.ab@samsung.com> Cc: Herbert Pötzl <herbert@13thfloor.at> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Roman Weissgaerber <weissg@vienna.at> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Tony Olech <tony.olech@elandigitalsystems.com> Cc: Florian Floe Echtler <echtler@fs.tum.de> Cc: Christian Lucht <lucht@codemercs.com> Cc: Juergen Stuber <starblue@sourceforge.net> Cc: Georges Toth <g.toth@e-biz.lu> Cc: Bill Ryder <bryder@sgi.com> Cc: Kuba Ober <kuba@mareimbrium.org> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-23 18:12:03 +08:00
mEp->ep.maxpacket = usb_endpoint_maxp(desc);
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
cap |= QH_IOS;
cap |= (mEp->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT;
mEp->qh.ptr->cap = cpu_to_le32(cap);
mEp->qh.ptr->td.next |= cpu_to_le32(TD_TERMINATE); /* needed? */
/*
* Enable endpoints in the HW other than ep0 as ep0
* is always enabled
*/
if (mEp->num)
retval |= hw_ep_enable(mEp->ci, mEp->num, mEp->dir, mEp->type);
spin_unlock_irqrestore(mEp->lock, flags);
return retval;
}
/**
* ep_disable: endpoint is no longer usable
*
* Check usb_ep_disable() at "usb_gadget.h" for details
*/
static int ep_disable(struct usb_ep *ep)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
int direction, retval = 0;
unsigned long flags;
if (ep == NULL)
return -EINVAL;
else if (mEp->ep.desc == NULL)
return -EBUSY;
spin_lock_irqsave(mEp->lock, flags);
/* only internal SW should disable ctrl endpts */
direction = mEp->dir;
do {
retval |= _ep_nuke(mEp);
retval |= hw_ep_disable(mEp->ci, mEp->num, mEp->dir);
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
mEp->dir = (mEp->dir == TX) ? RX : TX;
} while (mEp->dir != direction);
mEp->ep.desc = NULL;
spin_unlock_irqrestore(mEp->lock, flags);
return retval;
}
/**
* ep_alloc_request: allocate a request object to use with this endpoint
*
* Check usb_ep_alloc_request() at "usb_gadget.h" for details
*/
static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
struct ci13xxx_req *mReq = NULL;
if (ep == NULL)
return NULL;
mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
if (mReq != NULL) {
INIT_LIST_HEAD(&mReq->queue);
mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
&mReq->dma);
if (mReq->ptr == NULL) {
kfree(mReq);
mReq = NULL;
}
}
return (mReq == NULL) ? NULL : &mReq->req;
}
/**
* ep_free_request: frees a request object
*
* Check usb_ep_free_request() at "usb_gadget.h" for details
*/
static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
unsigned long flags;
if (ep == NULL || req == NULL) {
return;
} else if (!list_empty(&mReq->queue)) {
dev_err(mEp->ci->dev, "freeing queued request\n");
return;
}
spin_lock_irqsave(mEp->lock, flags);
if (mReq->ptr)
dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
kfree(mReq);
spin_unlock_irqrestore(mEp->lock, flags);
}
/**
* ep_queue: queues (submits) an I/O request to an endpoint
*
* Check usb_ep_queue()* at usb_gadget.h" for details
*/
static int ep_queue(struct usb_ep *ep, struct usb_request *req,
gfp_t __maybe_unused gfp_flags)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
struct ci13xxx *ci = mEp->ci;
int retval = 0;
unsigned long flags;
if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
if (req->length)
mEp = (ci->ep0_dir == RX) ?
ci->ep0out : ci->ep0in;
if (!list_empty(&mEp->qh.queue)) {
_ep_nuke(mEp);
retval = -EOVERFLOW;
dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n",
_usb_addr(mEp));
}
}
/* first nuke then test link, e.g. previous status has not sent */
if (!list_empty(&mReq->queue)) {
retval = -EBUSY;
dev_err(mEp->ci->dev, "request already in queue\n");
goto done;
}
if (req->length > 4 * CI13XXX_PAGE_SIZE) {
req->length = 4 * CI13XXX_PAGE_SIZE;
retval = -EMSGSIZE;
dev_warn(mEp->ci->dev, "request length truncated\n");
}
/* push request */
mReq->req.status = -EINPROGRESS;
mReq->req.actual = 0;
retval = _hardware_enqueue(mEp, mReq);
if (retval == -EALREADY)
retval = 0;
if (!retval)
list_add_tail(&mReq->queue, &mEp->qh.queue);
done:
spin_unlock_irqrestore(mEp->lock, flags);
return retval;
}
/**
* ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
*
* Check usb_ep_dequeue() at "usb_gadget.h" for details
*/
static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
unsigned long flags;
if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
mEp->ep.desc == NULL || list_empty(&mReq->queue) ||
list_empty(&mEp->qh.queue))
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
/* pop request */
list_del_init(&mReq->queue);
usb_gadget_unmap_request(&mEp->ci->gadget, req, mEp->dir);
req->status = -ECONNRESET;
if (mReq->req.complete != NULL) {
spin_unlock(mEp->lock);
mReq->req.complete(&mEp->ep, &mReq->req);
spin_lock(mEp->lock);
}
spin_unlock_irqrestore(mEp->lock, flags);
return 0;
}
/**
* ep_set_halt: sets the endpoint halt feature
*
* Check usb_ep_set_halt() at "usb_gadget.h" for details
*/
static int ep_set_halt(struct usb_ep *ep, int value)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
int direction, retval = 0;
unsigned long flags;
if (ep == NULL || mEp->ep.desc == NULL)
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
#ifndef STALL_IN
/* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
!list_empty(&mEp->qh.queue)) {
spin_unlock_irqrestore(mEp->lock, flags);
return -EAGAIN;
}
#endif
direction = mEp->dir;
do {
retval |= hw_ep_set_halt(mEp->ci, mEp->num, mEp->dir, value);
if (!value)
mEp->wedge = 0;
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
mEp->dir = (mEp->dir == TX) ? RX : TX;
} while (mEp->dir != direction);
spin_unlock_irqrestore(mEp->lock, flags);
return retval;
}
/**
* ep_set_wedge: sets the halt feature and ignores clear requests
*
* Check usb_ep_set_wedge() at "usb_gadget.h" for details
*/
static int ep_set_wedge(struct usb_ep *ep)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
unsigned long flags;
if (ep == NULL || mEp->ep.desc == NULL)
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
mEp->wedge = 1;
spin_unlock_irqrestore(mEp->lock, flags);
return usb_ep_set_halt(ep);
}
/**
* ep_fifo_flush: flushes contents of a fifo
*
* Check usb_ep_fifo_flush() at "usb_gadget.h" for details
*/
static void ep_fifo_flush(struct usb_ep *ep)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
unsigned long flags;
if (ep == NULL) {
dev_err(mEp->ci->dev, "%02X: -EINVAL\n", _usb_addr(mEp));
return;
}
spin_lock_irqsave(mEp->lock, flags);
hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
spin_unlock_irqrestore(mEp->lock, flags);
}
/**
* Endpoint-specific part of the API to the USB controller hardware
* Check "usb_gadget.h" for details
*/
static const struct usb_ep_ops usb_ep_ops = {
.enable = ep_enable,
.disable = ep_disable,
.alloc_request = ep_alloc_request,
.free_request = ep_free_request,
.queue = ep_queue,
.dequeue = ep_dequeue,
.set_halt = ep_set_halt,
.set_wedge = ep_set_wedge,
.fifo_flush = ep_fifo_flush,
};
/******************************************************************************
* GADGET block
*****************************************************************************/
static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
{
struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
unsigned long flags;
int gadget_ready = 0;
if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS))
return -EOPNOTSUPP;
spin_lock_irqsave(&ci->lock, flags);
ci->vbus_active = is_active;
if (ci->driver)
gadget_ready = 1;
spin_unlock_irqrestore(&ci->lock, flags);
if (gadget_ready) {
if (is_active) {
pm_runtime_get_sync(&_gadget->dev);
hw_device_reset(ci, USBMODE_CM_DC);
hw_device_state(ci, ci->ep0out->qh.dma);
} else {
hw_device_state(ci, 0);
if (ci->platdata->notify_event)
ci->platdata->notify_event(ci,
CI13XXX_CONTROLLER_STOPPED_EVENT);
_gadget_stop_activity(&ci->gadget);
pm_runtime_put_sync(&_gadget->dev);
}
}
return 0;
}
static int ci13xxx_wakeup(struct usb_gadget *_gadget)
{
struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&ci->lock, flags);
if (!ci->remote_wakeup) {
ret = -EOPNOTSUPP;
goto out;
}
if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) {
ret = -EINVAL;
goto out;
}
hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR);
out:
spin_unlock_irqrestore(&ci->lock, flags);
return ret;
}
static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
{
struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
if (ci->transceiver)
return usb_phy_set_power(ci->transceiver, mA);
return -ENOTSUPP;
}
/* Change Data+ pullup status
* this func is used by usb_gadget_connect/disconnet
*/
static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on)
{
struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
if (is_on)
hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
else
hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
return 0;
}
static int ci13xxx_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver);
static int ci13xxx_stop(struct usb_gadget *gadget,
struct usb_gadget_driver *driver);
/**
* Device operations part of the API to the USB controller hardware,
* which don't involve endpoints (or i/o)
* Check "usb_gadget.h" for details
*/
static const struct usb_gadget_ops usb_gadget_ops = {
.vbus_session = ci13xxx_vbus_session,
.wakeup = ci13xxx_wakeup,
.pullup = ci13xxx_pullup,
.vbus_draw = ci13xxx_vbus_draw,
.udc_start = ci13xxx_start,
.udc_stop = ci13xxx_stop,
};
static int init_eps(struct ci13xxx *ci)
{
int retval = 0, i, j;
for (i = 0; i < ci->hw_ep_max/2; i++)
for (j = RX; j <= TX; j++) {
int k = i + j * ci->hw_ep_max/2;
struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[k];
scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i,
(j == TX) ? "in" : "out");
mEp->ci = ci;
mEp->lock = &ci->lock;
mEp->td_pool = ci->td_pool;
mEp->ep.name = mEp->name;
mEp->ep.ops = &usb_ep_ops;
/*
* for ep0: maxP defined in desc, for other
* eps, maxP is set by epautoconfig() called
* by gadget layer
*/
mEp->ep.maxpacket = (unsigned short)~0;
INIT_LIST_HEAD(&mEp->qh.queue);
mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL,
&mEp->qh.dma);
if (mEp->qh.ptr == NULL)
retval = -ENOMEM;
else
memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr));
/*
* set up shorthands for ep0 out and in endpoints,
* don't add to gadget's ep_list
*/
if (i == 0) {
if (j == RX)
ci->ep0out = mEp;
else
ci->ep0in = mEp;
mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
continue;
}
list_add_tail(&mEp->ep.ep_list, &ci->gadget.ep_list);
}
return retval;
}
static void destroy_eps(struct ci13xxx *ci)
{
int i;
for (i = 0; i < ci->hw_ep_max; i++) {
struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
}
}
/**
* ci13xxx_start: register a gadget driver
* @gadget: our gadget
* @driver: the driver being registered
*
* Interrupts are enabled here.
*/
static int ci13xxx_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
unsigned long flags;
int retval = -ENOMEM;
if (driver->disconnect == NULL)
return -EINVAL;
ci->ep0out->ep.desc = &ctrl_endpt_out_desc;
retval = usb_ep_enable(&ci->ep0out->ep);
if (retval)
return retval;
ci->ep0in->ep.desc = &ctrl_endpt_in_desc;
retval = usb_ep_enable(&ci->ep0in->ep);
if (retval)
return retval;
spin_lock_irqsave(&ci->lock, flags);
ci->driver = driver;
pm_runtime_get_sync(&ci->gadget.dev);
if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) {
if (ci->vbus_active) {
if (ci->platdata->flags & CI13XXX_REGS_SHARED)
hw_device_reset(ci, USBMODE_CM_DC);
} else {
pm_runtime_put_sync(&ci->gadget.dev);
goto done;
}
}
retval = hw_device_state(ci, ci->ep0out->qh.dma);
if (retval)
pm_runtime_put_sync(&ci->gadget.dev);
done:
spin_unlock_irqrestore(&ci->lock, flags);
return retval;
}
/**
usb: gadget: convert all users to the new udc infrastructure peripheral drivers are using usb_add_gadget()/usb_del_gadget() to register/unregister to the udc-core. The udc-core will take the first available gadget driver and attach function driver which is calling usb_gadget_register_driver(). This is the same behaviour we have right now. Only dummy_hcd was tested, the others were compiled tested. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Anton Tikhomirov <av.tikhomirov@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dan Carpenter <error27@gmail.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Li Yang <leoli@freescale.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavankumar Kondeti <pkondeti@codeaurora.org> Cc: Roy Huang <roy.huang@analog.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com> Cc: cxie4 <cxie4@marvell.com> Cc: linux-geode@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 21:33:47 +08:00
* ci13xxx_stop: unregister a gadget driver
*/
static int ci13xxx_stop(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
unsigned long flags;
spin_lock_irqsave(&ci->lock, flags);
if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) ||
ci->vbus_active) {
hw_device_state(ci, 0);
if (ci->platdata->notify_event)
ci->platdata->notify_event(ci,
CI13XXX_CONTROLLER_STOPPED_EVENT);
ci->driver = NULL;
spin_unlock_irqrestore(&ci->lock, flags);
_gadget_stop_activity(&ci->gadget);
spin_lock_irqsave(&ci->lock, flags);
pm_runtime_put(&ci->gadget.dev);
}
spin_unlock_irqrestore(&ci->lock, flags);
return 0;
}
/******************************************************************************
* BUS block
*****************************************************************************/
/**
* udc_irq: ci interrupt handler
*
* This function returns IRQ_HANDLED if the IRQ has been handled
* It locks access to registers
*/
static irqreturn_t udc_irq(struct ci13xxx *ci)
{
irqreturn_t retval;
u32 intr;
if (ci == NULL)
return IRQ_HANDLED;
spin_lock(&ci->lock);
if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
if (hw_read(ci, OP_USBMODE, USBMODE_CM) !=
USBMODE_CM_DC) {
spin_unlock(&ci->lock);
return IRQ_NONE;
}
}
intr = hw_test_and_clear_intr_active(ci);
if (intr) {
/* order defines priority - do NOT change it */
if (USBi_URI & intr)
isr_reset_handler(ci);
if (USBi_PCI & intr) {
ci->gadget.speed = hw_port_is_high_speed(ci) ?
USB_SPEED_HIGH : USB_SPEED_FULL;
if (ci->suspended && ci->driver->resume) {
spin_unlock(&ci->lock);
ci->driver->resume(&ci->gadget);
spin_lock(&ci->lock);
ci->suspended = 0;
}
}
if (USBi_UI & intr)
isr_tr_complete_handler(ci);
if (USBi_SLI & intr) {
if (ci->gadget.speed != USB_SPEED_UNKNOWN &&
ci->driver->suspend) {
ci->suspended = 1;
spin_unlock(&ci->lock);
ci->driver->suspend(&ci->gadget);
spin_lock(&ci->lock);
}
}
retval = IRQ_HANDLED;
} else {
retval = IRQ_NONE;
}
spin_unlock(&ci->lock);
return retval;
}
/**
* udc_release: driver release function
* @dev: device
*
* Currently does nothing
*/
static void udc_release(struct device *dev)
{
}
/**
* udc_start: initialize gadget role
* @ci: chipidea controller
*/
static int udc_start(struct ci13xxx *ci)
{
struct device *dev = ci->dev;
int retval = 0;
spin_lock_init(&ci->lock);
ci->gadget.ops = &usb_gadget_ops;
ci->gadget.speed = USB_SPEED_UNKNOWN;
ci->gadget.max_speed = USB_SPEED_HIGH;
ci->gadget.is_otg = 0;
ci->gadget.name = ci->platdata->name;
INIT_LIST_HEAD(&ci->gadget.ep_list);
dev_set_name(&ci->gadget.dev, "gadget");
ci->gadget.dev.dma_mask = dev->dma_mask;
ci->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask;
ci->gadget.dev.parent = dev;
ci->gadget.dev.release = udc_release;
/* alloc resources */
ci->qh_pool = dma_pool_create("ci13xxx_qh", dev,
sizeof(struct ci13xxx_qh),
64, CI13XXX_PAGE_SIZE);
if (ci->qh_pool == NULL)
return -ENOMEM;
ci->td_pool = dma_pool_create("ci13xxx_td", dev,
sizeof(struct ci13xxx_td),
64, CI13XXX_PAGE_SIZE);
if (ci->td_pool == NULL) {
retval = -ENOMEM;
goto free_qh_pool;
}
retval = init_eps(ci);
if (retval)
goto free_pools;
ci->gadget.ep0 = &ci->ep0in->ep;
if (ci->global_phy)
ci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
if (ci->transceiver == NULL) {
retval = -ENODEV;
goto destroy_eps;
}
}
if (!(ci->platdata->flags & CI13XXX_REGS_SHARED)) {
retval = hw_device_reset(ci, USBMODE_CM_DC);
if (retval)
goto put_transceiver;
}
retval = device_register(&ci->gadget.dev);
if (retval) {
put_device(&ci->gadget.dev);
goto put_transceiver;
}
if (!IS_ERR_OR_NULL(ci->transceiver)) {
retval = otg_set_peripheral(ci->transceiver->otg,
&ci->gadget);
if (retval)
goto unreg_device;
}
usb: gadget: convert all users to the new udc infrastructure peripheral drivers are using usb_add_gadget()/usb_del_gadget() to register/unregister to the udc-core. The udc-core will take the first available gadget driver and attach function driver which is calling usb_gadget_register_driver(). This is the same behaviour we have right now. Only dummy_hcd was tested, the others were compiled tested. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Anton Tikhomirov <av.tikhomirov@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dan Carpenter <error27@gmail.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Li Yang <leoli@freescale.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavankumar Kondeti <pkondeti@codeaurora.org> Cc: Roy Huang <roy.huang@analog.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com> Cc: cxie4 <cxie4@marvell.com> Cc: linux-geode@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 21:33:47 +08:00
retval = usb_add_gadget_udc(dev, &ci->gadget);
usb: gadget: convert all users to the new udc infrastructure peripheral drivers are using usb_add_gadget()/usb_del_gadget() to register/unregister to the udc-core. The udc-core will take the first available gadget driver and attach function driver which is calling usb_gadget_register_driver(). This is the same behaviour we have right now. Only dummy_hcd was tested, the others were compiled tested. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Anton Tikhomirov <av.tikhomirov@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dan Carpenter <error27@gmail.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Li Yang <leoli@freescale.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavankumar Kondeti <pkondeti@codeaurora.org> Cc: Roy Huang <roy.huang@analog.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com> Cc: cxie4 <cxie4@marvell.com> Cc: linux-geode@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 21:33:47 +08:00
if (retval)
goto remove_trans;
pm_runtime_no_callbacks(&ci->gadget.dev);
pm_runtime_enable(&ci->gadget.dev);
return retval;
usb: gadget: convert all users to the new udc infrastructure peripheral drivers are using usb_add_gadget()/usb_del_gadget() to register/unregister to the udc-core. The udc-core will take the first available gadget driver and attach function driver which is calling usb_gadget_register_driver(). This is the same behaviour we have right now. Only dummy_hcd was tested, the others were compiled tested. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Anton Tikhomirov <av.tikhomirov@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dan Carpenter <error27@gmail.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Li Yang <leoli@freescale.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavankumar Kondeti <pkondeti@codeaurora.org> Cc: Roy Huang <roy.huang@analog.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com> Cc: cxie4 <cxie4@marvell.com> Cc: linux-geode@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 21:33:47 +08:00
remove_trans:
if (!IS_ERR_OR_NULL(ci->transceiver)) {
otg_set_peripheral(ci->transceiver->otg, NULL);
if (ci->global_phy)
usb_put_phy(ci->transceiver);
usb: gadget: convert all users to the new udc infrastructure peripheral drivers are using usb_add_gadget()/usb_del_gadget() to register/unregister to the udc-core. The udc-core will take the first available gadget driver and attach function driver which is calling usb_gadget_register_driver(). This is the same behaviour we have right now. Only dummy_hcd was tested, the others were compiled tested. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Anton Tikhomirov <av.tikhomirov@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dan Carpenter <error27@gmail.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Li Yang <leoli@freescale.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavankumar Kondeti <pkondeti@codeaurora.org> Cc: Roy Huang <roy.huang@analog.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com> Cc: cxie4 <cxie4@marvell.com> Cc: linux-geode@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 21:33:47 +08:00
}
dev_err(dev, "error = %i\n", retval);
unreg_device:
device_unregister(&ci->gadget.dev);
put_transceiver:
if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy)
usb_put_phy(ci->transceiver);
destroy_eps:
destroy_eps(ci);
free_pools:
dma_pool_destroy(ci->td_pool);
free_qh_pool:
dma_pool_destroy(ci->qh_pool);
return retval;
}
/**
* udc_remove: parent remove must call this to remove UDC
*
* No interrupts active, the IRQ has been released
*/
static void udc_stop(struct ci13xxx *ci)
{
if (ci == NULL)
return;
usb_del_gadget_udc(&ci->gadget);
destroy_eps(ci);
dma_pool_destroy(ci->td_pool);
dma_pool_destroy(ci->qh_pool);
if (!IS_ERR_OR_NULL(ci->transceiver)) {
otg_set_peripheral(ci->transceiver->otg, NULL);
if (ci->global_phy)
usb_put_phy(ci->transceiver);
}
device_unregister(&ci->gadget.dev);
/* my kobject is dynamic, I swear! */
memset(&ci->gadget, 0, sizeof(ci->gadget));
}
/**
* ci_hdrc_gadget_init - initialize device related bits
* ci: the controller
*
* This function enables the gadget role, if the device is "device capable".
*/
int ci_hdrc_gadget_init(struct ci13xxx *ci)
{
struct ci_role_driver *rdrv;
if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC))
return -ENXIO;
rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
if (!rdrv)
return -ENOMEM;
rdrv->start = udc_start;
rdrv->stop = udc_stop;
rdrv->irq = udc_irq;
rdrv->name = "gadget";
ci->roles[CI_ROLE_GADGET] = rdrv;
return 0;
}