openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/drivers/usb/host/ohci-omap3.c

736 lines
20 KiB
C
Raw Blame History

/*
* ohci-omap3.c - driver for OHCI on OMAP3 and later processors
*
* Bus Glue for OMAP3 USBHOST 3 port OHCI controller
* This controller is also used in later OMAPs and AM35x chips
*
* Copyright (C) 2007-2010 Texas Instruments, Inc.
* Author: Vikram Pandita <vikram.pandita@ti.com>
* Author: Anand Gadiyar <gadiyar@ti.com>
*
* Based on ehci-omap.c and some other ohci glue layers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* TODO (last updated Mar 10th, 2010):
* - add kernel-doc
* - Factor out code common to EHCI to a separate file
* - Make EHCI and OHCI coexist together
* - needs newer silicon versions to actually work
* - the last one to be loaded currently steps on the other's toes
* - Add hooks for configuring transceivers, etc. at init/exit
* - Add aggressive clock-management code
*/
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <plat/usb.h>
/*
* OMAP USBHOST Register addresses: VIRTUAL ADDRESSES
* Use ohci_omap_readl()/ohci_omap_writel() functions
*/
/* TLL Register Set */
#define OMAP_USBTLL_REVISION (0x00)
#define OMAP_USBTLL_SYSCONFIG (0x10)
#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
#define OMAP_USBTLL_SYSSTATUS (0x14)
#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
#define OMAP_USBTLL_IRQSTATUS (0x18)
#define OMAP_USBTLL_IRQENABLE (0x1C)
#define OMAP_TLL_SHARED_CONF (0x30)
#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
#define OMAP_TLL_CHANNEL_COUNT 3
/* UHH Register Set */
#define OMAP_UHH_REVISION (0x00)
#define OMAP_UHH_SYSCONFIG (0x10)
#define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12)
#define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8)
#define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3)
#define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2)
#define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1)
#define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0)
#define OMAP_UHH_SYSSTATUS (0x14)
#define OMAP_UHH_SYSSTATUS_UHHRESETDONE (1 << 0)
#define OMAP_UHH_SYSSTATUS_OHCIRESETDONE (1 << 1)
#define OMAP_UHH_SYSSTATUS_EHCIRESETDONE (1 << 2)
#define OMAP_UHH_HOSTCONFIG (0x40)
#define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0)
#define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0)
#define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11)
#define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12)
#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2)
#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3)
#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4)
#define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5)
#define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8)
#define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9)
#define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10)
#define OMAP_UHH_DEBUG_CSR (0x44)
/*-------------------------------------------------------------------------*/
static inline void ohci_omap_writel(void __iomem *base, u32 reg, u32 val)
{
__raw_writel(val, base + reg);
}
static inline u32 ohci_omap_readl(void __iomem *base, u32 reg)
{
return __raw_readl(base + reg);
}
static inline void ohci_omap_writeb(void __iomem *base, u8 reg, u8 val)
{
__raw_writeb(val, base + reg);
}
static inline u8 ohci_omap_readb(void __iomem *base, u8 reg)
{
return __raw_readb(base + reg);
}
/*-------------------------------------------------------------------------*/
struct ohci_hcd_omap3 {
struct ohci_hcd *ohci;
struct device *dev;
struct clk *usbhost_ick;
struct clk *usbhost2_120m_fck;
struct clk *usbhost1_48m_fck;
struct clk *usbtll_fck;
struct clk *usbtll_ick;
/* port_mode: TLL/PHY, 2/3/4/6-PIN, DP-DM/DAT-SE0 */
enum ohci_omap3_port_mode port_mode[OMAP3_HS_USB_PORTS];
void __iomem *uhh_base;
void __iomem *tll_base;
void __iomem *ohci_base;
unsigned es2_compatibility:1;
};
/*-------------------------------------------------------------------------*/
static void ohci_omap3_clock_power(struct ohci_hcd_omap3 *omap, int on)
{
if (on) {
clk_enable(omap->usbtll_ick);
clk_enable(omap->usbtll_fck);
clk_enable(omap->usbhost_ick);
clk_enable(omap->usbhost1_48m_fck);
clk_enable(omap->usbhost2_120m_fck);
} else {
clk_disable(omap->usbhost2_120m_fck);
clk_disable(omap->usbhost1_48m_fck);
clk_disable(omap->usbhost_ick);
clk_disable(omap->usbtll_fck);
clk_disable(omap->usbtll_ick);
}
}
static int ohci_omap3_init(struct usb_hcd *hcd)
{
dev_dbg(hcd->self.controller, "starting OHCI controller\n");
return ohci_init(hcd_to_ohci(hcd));
}
/*-------------------------------------------------------------------------*/
static int ohci_omap3_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
/*
* RemoteWakeupConnected has to be set explicitly before
* calling ohci_run. The reset value of RWC is 0.
*/
ohci->hc_control = OHCI_CTRL_RWC;
writel(OHCI_CTRL_RWC, &ohci->regs->control);
ret = ohci_run(ohci);
if (ret < 0) {
dev_err(hcd->self.controller, "can't start\n");
ohci_stop(hcd);
}
return ret;
}
/*-------------------------------------------------------------------------*/
/*
* convert the port-mode enum to a value we can use in the FSLSMODE
* field of USBTLL_CHANNEL_CONF
*/
static unsigned ohci_omap3_fslsmode(enum ohci_omap3_port_mode mode)
{
switch (mode) {
case OMAP_OHCI_PORT_MODE_UNUSED:
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
return 0x0;
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
return 0x1;
case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
return 0x2;
case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
return 0x3;
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
return 0x4;
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
return 0x5;
case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
return 0x6;
case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
return 0x7;
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
return 0xA;
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
return 0xB;
default:
pr_warning("Invalid port mode, using default\n");
return 0x0;
}
}
static void ohci_omap3_tll_config(struct ohci_hcd_omap3 *omap)
{
u32 reg;
int i;
/* Program TLL SHARED CONF */
reg = ohci_omap_readl(omap->tll_base, OMAP_TLL_SHARED_CONF);
reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
reg |= OMAP_TLL_SHARED_CONF_USB_DIVRATION;
reg |= OMAP_TLL_SHARED_CONF_FCLK_IS_ON;
ohci_omap_writel(omap->tll_base, OMAP_TLL_SHARED_CONF, reg);
/* Program each TLL channel */
/*
* REVISIT: Only the 3-pin and 4-pin PHY modes have
* actually been tested.
*/
for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
/* Enable only those channels that are actually used */
if (omap->port_mode[i] == OMAP_OHCI_PORT_MODE_UNUSED)
continue;
reg = ohci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
reg |= ohci_omap3_fslsmode(omap->port_mode[i])
<< OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
ohci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
}
}
/* omap3_start_ohci
* - Start the TI USBHOST controller
*/
static int omap3_start_ohci(struct ohci_hcd_omap3 *omap, struct usb_hcd *hcd)
{
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
u32 reg = 0;
int ret = 0;
dev_dbg(omap->dev, "starting TI OHCI USB Controller\n");
/* Get all the clock handles we need */
omap->usbhost_ick = clk_get(omap->dev, "usbhost_ick");
if (IS_ERR(omap->usbhost_ick)) {
dev_err(omap->dev, "could not get usbhost_ick\n");
ret = PTR_ERR(omap->usbhost_ick);
goto err_host_ick;
}
omap->usbhost2_120m_fck = clk_get(omap->dev, "usbhost_120m_fck");
if (IS_ERR(omap->usbhost2_120m_fck)) {
dev_err(omap->dev, "could not get usbhost_120m_fck\n");
ret = PTR_ERR(omap->usbhost2_120m_fck);
goto err_host_120m_fck;
}
omap->usbhost1_48m_fck = clk_get(omap->dev, "usbhost_48m_fck");
if (IS_ERR(omap->usbhost1_48m_fck)) {
dev_err(omap->dev, "could not get usbhost_48m_fck\n");
ret = PTR_ERR(omap->usbhost1_48m_fck);
goto err_host_48m_fck;
}
omap->usbtll_fck = clk_get(omap->dev, "usbtll_fck");
if (IS_ERR(omap->usbtll_fck)) {
dev_err(omap->dev, "could not get usbtll_fck\n");
ret = PTR_ERR(omap->usbtll_fck);
goto err_tll_fck;
}
omap->usbtll_ick = clk_get(omap->dev, "usbtll_ick");
if (IS_ERR(omap->usbtll_ick)) {
dev_err(omap->dev, "could not get usbtll_ick\n");
ret = PTR_ERR(omap->usbtll_ick);
goto err_tll_ick;
}
/* Now enable all the clocks in the correct order */
ohci_omap3_clock_power(omap, 1);
/* perform TLL soft reset, and wait until reset is complete */
ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
OMAP_USBTLL_SYSCONFIG_SOFTRESET);
/* Wait for TLL reset to complete */
while (!(ohci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
& OMAP_USBTLL_SYSSTATUS_RESETDONE)) {
cpu_relax();
if (time_after(jiffies, timeout)) {
dev_dbg(omap->dev, "operation timed out\n");
ret = -EINVAL;
goto err_sys_status;
}
}
dev_dbg(omap->dev, "TLL reset done\n");
/* (1<<3) = no idle mode only for initial debugging */
ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
OMAP_USBTLL_SYSCONFIG_CACTIVITY);
/* Put UHH in NoIdle/NoStandby mode */
reg = ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSCONFIG);
reg |= (OMAP_UHH_SYSCONFIG_ENAWAKEUP
| OMAP_UHH_SYSCONFIG_SIDLEMODE
| OMAP_UHH_SYSCONFIG_CACTIVITY
| OMAP_UHH_SYSCONFIG_MIDLEMODE);
reg &= ~OMAP_UHH_SYSCONFIG_AUTOIDLE;
reg &= ~OMAP_UHH_SYSCONFIG_SOFTRESET;
ohci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, reg);
reg = ohci_omap_readl(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
/* setup ULPI bypass and burst configurations */
reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
| OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
| OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
/*
* REVISIT: Pi_CONNECT_STATUS controls MStandby
* assertion and Swakeup generation - let us not
* worry about this for now. OMAP HWMOD framework
* might take care of this later. If not, we can
* update these registers when adding aggressive
* clock management code.
*
* For now, turn off all the Pi_CONNECT_STATUS bits
*
if (omap->port_mode[0] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
if (omap->port_mode[1] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
if (omap->port_mode[2] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
*/
reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
if (omap->es2_compatibility) {
/*
* All OHCI modes need to go through the TLL,
* unlike in the EHCI case. So use UTMI mode
* for all ports for OHCI, on ES2.x silicon
*/
dev_dbg(omap->dev, "OMAP3 ES version <= ES2.1\n");
reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
} else {
dev_dbg(omap->dev, "OMAP3 ES version > ES2.1\n");
if (omap->port_mode[0] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
if (omap->port_mode[1] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
if (omap->port_mode[2] == OMAP_OHCI_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
}
ohci_omap_writel(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
dev_dbg(omap->dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
ohci_omap3_tll_config(omap);
return 0;
err_sys_status:
ohci_omap3_clock_power(omap, 0);
clk_put(omap->usbtll_ick);
err_tll_ick:
clk_put(omap->usbtll_fck);
err_tll_fck:
clk_put(omap->usbhost1_48m_fck);
err_host_48m_fck:
clk_put(omap->usbhost2_120m_fck);
err_host_120m_fck:
clk_put(omap->usbhost_ick);
err_host_ick:
return ret;
}
static void omap3_stop_ohci(struct ohci_hcd_omap3 *omap, struct usb_hcd *hcd)
{
unsigned long timeout = jiffies + msecs_to_jiffies(100);
dev_dbg(omap->dev, "stopping TI EHCI USB Controller\n");
/* Reset USBHOST for insmod/rmmod to work */
ohci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG,
OMAP_UHH_SYSCONFIG_SOFTRESET);
while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& OMAP_UHH_SYSSTATUS_UHHRESETDONE)) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(omap->dev, "operation timed out\n");
}
while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& OMAP_UHH_SYSSTATUS_OHCIRESETDONE)) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(omap->dev, "operation timed out\n");
}
while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& OMAP_UHH_SYSSTATUS_EHCIRESETDONE)) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(omap->dev, "operation timed out\n");
}
ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1));
while (!(ohci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
& (1 << 0))) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(omap->dev, "operation timed out\n");
}
ohci_omap3_clock_power(omap, 0);
if (omap->usbtll_fck != NULL) {
clk_put(omap->usbtll_fck);
omap->usbtll_fck = NULL;
}
if (omap->usbhost_ick != NULL) {
clk_put(omap->usbhost_ick);
omap->usbhost_ick = NULL;
}
if (omap->usbhost1_48m_fck != NULL) {
clk_put(omap->usbhost1_48m_fck);
omap->usbhost1_48m_fck = NULL;
}
if (omap->usbhost2_120m_fck != NULL) {
clk_put(omap->usbhost2_120m_fck);
omap->usbhost2_120m_fck = NULL;
}
if (omap->usbtll_ick != NULL) {
clk_put(omap->usbtll_ick);
omap->usbtll_ick = NULL;
}
dev_dbg(omap->dev, "Clock to USB host has been disabled\n");
}
/*-------------------------------------------------------------------------*/
static const struct hc_driver ohci_omap3_hc_driver = {
.description = hcd_name,
.product_desc = "OMAP3 OHCI Host Controller",
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.reset = ohci_omap3_init,
.start = ohci_omap3_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
/*-------------------------------------------------------------------------*/
/*
* configure so an HC device and id are always provided
* always called with process context; sleeping is OK
*/
/**
* ohci_hcd_omap3_probe - initialize OMAP-based HCDs
*
* Allocates basic resources for this USB host controller, and
* then invokes the start() method for the HCD associated with it
* through the hotplug entry's driver_data.
*/
static int __devinit ohci_hcd_omap3_probe(struct platform_device *pdev)
{
struct ohci_hcd_omap_platform_data *pdata = pdev->dev.platform_data;
struct ohci_hcd_omap3 *omap;
struct resource *res;
struct usb_hcd *hcd;
int ret = -ENODEV;
int irq;
if (usb_disabled())
goto err_disabled;
if (!pdata) {
dev_dbg(&pdev->dev, "missing platform_data\n");
goto err_pdata;
}
irq = platform_get_irq(pdev, 0);
omap = kzalloc(sizeof(*omap), GFP_KERNEL);
if (!omap) {
ret = -ENOMEM;
goto err_disabled;
}
hcd = usb_create_hcd(&ohci_omap3_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
ret = -ENOMEM;
goto err_create_hcd;
}
platform_set_drvdata(pdev, omap);
omap->dev = &pdev->dev;
omap->port_mode[0] = pdata->port_mode[0];
omap->port_mode[1] = pdata->port_mode[1];
omap->port_mode[2] = pdata->port_mode[2];
omap->es2_compatibility = pdata->es2_compatibility;
omap->ohci = hcd_to_ohci(hcd);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
dev_err(&pdev->dev, "OHCI ioremap failed\n");
ret = -ENOMEM;
goto err_ioremap;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
omap->uhh_base = ioremap(res->start, resource_size(res));
if (!omap->uhh_base) {
dev_err(&pdev->dev, "UHH ioremap failed\n");
ret = -ENOMEM;
goto err_uhh_ioremap;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
omap->tll_base = ioremap(res->start, resource_size(res));
if (!omap->tll_base) {
dev_err(&pdev->dev, "TLL ioremap failed\n");
ret = -ENOMEM;
goto err_tll_ioremap;
}
ret = omap3_start_ohci(omap, hcd);
if (ret) {
dev_dbg(&pdev->dev, "failed to start ehci\n");
goto err_start;
}
ohci_hcd_init(omap->ohci);
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (ret) {
dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
goto err_add_hcd;
}
return 0;
err_add_hcd:
omap3_stop_ohci(omap, hcd);
err_start:
iounmap(omap->tll_base);
err_tll_ioremap:
iounmap(omap->uhh_base);
err_uhh_ioremap:
iounmap(hcd->regs);
err_ioremap:
usb_put_hcd(hcd);
err_create_hcd:
kfree(omap);
err_pdata:
err_disabled:
return ret;
}
/*
* may be called without controller electrically present
* may be called with controller, bus, and devices active
*/
/**
* ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs
* @pdev: USB Host Controller being removed
*
* Reverses the effect of ohci_hcd_omap3_probe(), first invoking
* the HCD's stop() method. It is always called from a thread
* context, normally "rmmod", "apmd", or something similar.
*/
static int __devexit ohci_hcd_omap3_remove(struct platform_device *pdev)
{
struct ohci_hcd_omap3 *omap = platform_get_drvdata(pdev);
struct usb_hcd *hcd = ohci_to_hcd(omap->ohci);
usb_remove_hcd(hcd);
omap3_stop_ohci(omap, hcd);
iounmap(hcd->regs);
iounmap(omap->tll_base);
iounmap(omap->uhh_base);
usb_put_hcd(hcd);
kfree(omap);
return 0;
}
static void ohci_hcd_omap3_shutdown(struct platform_device *pdev)
{
struct ohci_hcd_omap3 *omap = platform_get_drvdata(pdev);
struct usb_hcd *hcd = ohci_to_hcd(omap->ohci);
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
}
static struct platform_driver ohci_hcd_omap3_driver = {
.probe = ohci_hcd_omap3_probe,
.remove = __devexit_p(ohci_hcd_omap3_remove),
.shutdown = ohci_hcd_omap3_shutdown,
.driver = {
.name = "ohci-omap3",
},
};
MODULE_ALIAS("platform:ohci-omap3");
MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");
Reference in New Issue View Git Blame Copy Permalink