openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

USB patches for 3.4-rc5 

Here are two EHCI Tegra driver patches for your tree.
 
 The first is a bit big, but the majority is just moving code around. It
 is needed due to the other EHCI core changes that went in way back in
 3.4-rc1, so this driver will now properly handle suspend/resume, as it
 was broken.  The other one is a minor bugfix that resolves an warning
 that people have been seeing.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.18 (GNU/Linux)
 
 iEYEABECAAYFAk+hli8ACgkQMUfUDdst+ymGdgCeKYDYx5w2N+tmSy50kjDEhSQI
 534AoK3+ZQUNsEyLU8ufLtNOyPrtIH3i
 =5LmY
 -----END PGP SIGNATURE-----

Merge tag 'usb-3.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB patches from Greg Kroah-Hartman:
 "Here are two EHCI Tegra driver patches for your tree.

  The first is a bit big, but the majority is just moving code around.
  It is needed due to the other EHCI core changes that went in way back
  in 3.4-rc1, so this driver will now properly handle suspend/resume, as
  it was broken.  The other one is a minor bugfix that resolves an
  warning that people have been seeing."

* tag 'usb-3.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: ehci-tegra: remove redundant gpio_set_value
  EHCI: update PM methods in ehci-tegra.c
This commit is contained in:
Linus Torvalds 2012-05-02 13:48:33 -07:00
parent c89ff23960 04c235c92c
commit ac001e7654
1 changed files with 195 additions and 181 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

376
drivers/usb/host/ehci-tegra.c
View File

@ -24,6 +24,7 @@
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_gpio.h> #include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <mach/usb_phy.h> #include <mach/usb_phy.h>
#include <mach/iomap.h> #include <mach/iomap.h>
@ -37,9 +38,7 @@ struct tegra_ehci_hcd {
struct clk *emc_clk; struct clk *emc_clk;
struct usb_phy *transceiver; struct usb_phy *transceiver;
int host_resumed; int host_resumed;
int bus_suspended;
int port_resuming; int port_resuming;
int power_down_on_bus_suspend;
enum tegra_usb_phy_port_speed port_speed; enum tegra_usb_phy_port_speed port_speed;
}; };
@ -273,120 +272,6 @@ static void tegra_ehci_restart(struct usb_hcd *hcd)
up_write(&ehci_cf_port_reset_rwsem); up_write(&ehci_cf_port_reset_rwsem);
} }
static int tegra_usb_suspend(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
struct ehci_regs __iomem *hw = tegra->ehci->regs;
unsigned long flags;
spin_lock_irqsave(&tegra->ehci->lock, flags);
tegra->port_speed = (readl(&hw->port_status[0]) >> 26) & 0x3;
ehci_halt(tegra->ehci);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore(&tegra->ehci->lock, flags);
tegra_ehci_power_down(hcd);
return 0;
}
static int tegra_usb_resume(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
struct ehci_regs __iomem *hw = ehci->regs;
unsigned long val;
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
tegra_ehci_power_up(hcd);
if (tegra->port_speed > TEGRA_USB_PHY_PORT_SPEED_HIGH) {
/* Wait for the phy to detect new devices
* before we restart the controller */
msleep(10);
goto restart;
}
/* Force the phy to keep data lines in suspend state */
tegra_ehci_phy_restore_start(tegra->phy, tegra->port_speed);
/* Enable host mode */
tdi_reset(ehci);
/* Enable Port Power */
val = readl(&hw->port_status[0]);
val |= PORT_POWER;
writel(val, &hw->port_status[0]);
udelay(10);
/* Check if the phy resume from LP0. When the phy resume from LP0
* USB register will be reset. */
if (!readl(&hw->async_next)) {
/* Program the field PTC based on the saved speed mode */
val = readl(&hw->port_status[0]);
val &= ~PORT_TEST(~0);
if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_HIGH)
val |= PORT_TEST_FORCE;
else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_FULL)
val |= PORT_TEST(6);
else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
val |= PORT_TEST(7);
writel(val, &hw->port_status[0]);
udelay(10);
/* Disable test mode by setting PTC field to NORMAL_OP */
val = readl(&hw->port_status[0]);
val &= ~PORT_TEST(~0);
writel(val, &hw->port_status[0]);
udelay(10);
}
/* Poll until CCS is enabled */
if (handshake(ehci, &hw->port_status[0], PORT_CONNECT,
PORT_CONNECT, 2000)) {
pr_err("%s: timeout waiting for PORT_CONNECT\n", __func__);
goto restart;
}
/* Poll until PE is enabled */
if (handshake(ehci, &hw->port_status[0], PORT_PE,
PORT_PE, 2000)) {
pr_err("%s: timeout waiting for USB_PORTSC1_PE\n", __func__);
goto restart;
}
/* Clear the PCI status, to avoid an interrupt taken upon resume */
val = readl(&hw->status);
val |= STS_PCD;
writel(val, &hw->status);
/* Put controller in suspend mode by writing 1 to SUSP bit of PORTSC */
val = readl(&hw->port_status[0]);
if ((val & PORT_POWER) && (val & PORT_PE)) {
val |= PORT_SUSPEND;
writel(val, &hw->port_status[0]);
/* Wait until port suspend completes */
if (handshake(ehci, &hw->port_status[0], PORT_SUSPEND,
PORT_SUSPEND, 1000)) {
pr_err("%s: timeout waiting for PORT_SUSPEND\n",
__func__);
goto restart;
}
}
tegra_ehci_phy_restore_end(tegra->phy);
return 0;
restart:
if (tegra->port_speed <= TEGRA_USB_PHY_PORT_SPEED_HIGH)
tegra_ehci_phy_restore_end(tegra->phy);
tegra_ehci_restart(hcd);
return 0;
}
static void tegra_ehci_shutdown(struct usb_hcd *hcd) static void tegra_ehci_shutdown(struct usb_hcd *hcd)
{ {
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller); struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
@ -434,36 +319,6 @@ static int tegra_ehci_setup(struct usb_hcd *hcd)
return retval; return retval;
} }
#ifdef CONFIG_PM
static int tegra_ehci_bus_suspend(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
int error_status = 0;
error_status = ehci_bus_suspend(hcd);
if (!error_status && tegra->power_down_on_bus_suspend) {
tegra_usb_suspend(hcd);
tegra->bus_suspended = 1;
}
return error_status;
}
static int tegra_ehci_bus_resume(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
if (tegra->bus_suspended && tegra->power_down_on_bus_suspend) {
tegra_usb_resume(hcd);
tegra->bus_suspended = 0;
}
tegra_usb_phy_preresume(tegra->phy);
tegra->port_resuming = 1;
return ehci_bus_resume(hcd);
}
#endif
struct temp_buffer { struct temp_buffer {
void *kmalloc_ptr; void *kmalloc_ptr;
void *old_xfer_buffer; void *old_xfer_buffer;
@ -574,8 +429,8 @@ static const struct hc_driver tegra_ehci_hc_driver = {
.hub_control = tegra_ehci_hub_control, .hub_control = tegra_ehci_hub_control,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
#ifdef CONFIG_PM #ifdef CONFIG_PM
.bus_suspend = tegra_ehci_bus_suspend, .bus_suspend = ehci_bus_suspend,
.bus_resume = tegra_ehci_bus_resume, .bus_resume = ehci_bus_resume,
#endif #endif
.relinquish_port = ehci_relinquish_port, .relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over, .port_handed_over = ehci_port_handed_over,
@ -603,11 +458,187 @@ static int setup_vbus_gpio(struct platform_device *pdev)
dev_err(&pdev->dev, "can't enable vbus\n"); dev_err(&pdev->dev, "can't enable vbus\n");
return err; return err;
} }
gpio_set_value(gpio, 1);
return err; return err;
} }
#ifdef CONFIG_PM
static int controller_suspend(struct device *dev)
{
struct tegra_ehci_hcd *tegra =
platform_get_drvdata(to_platform_device(dev));
struct ehci_hcd *ehci = tegra->ehci;
struct usb_hcd *hcd = ehci_to_hcd(ehci);
struct ehci_regs __iomem *hw = ehci->regs;
unsigned long flags;
if (time_before(jiffies, ehci->next_statechange))
msleep(10);
spin_lock_irqsave(&ehci->lock, flags);
tegra->port_speed = (readl(&hw->port_status[0]) >> 26) & 0x3;
ehci_halt(ehci);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore(&ehci->lock, flags);
tegra_ehci_power_down(hcd);
return 0;
}
static int controller_resume(struct device *dev)
{
struct tegra_ehci_hcd *tegra =
platform_get_drvdata(to_platform_device(dev));
struct ehci_hcd *ehci = tegra->ehci;
struct usb_hcd *hcd = ehci_to_hcd(ehci);
struct ehci_regs __iomem *hw = ehci->regs;
unsigned long val;
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
tegra_ehci_power_up(hcd);
if (tegra->port_speed > TEGRA_USB_PHY_PORT_SPEED_HIGH) {
/* Wait for the phy to detect new devices
* before we restart the controller */
msleep(10);
goto restart;
}
/* Force the phy to keep data lines in suspend state */
tegra_ehci_phy_restore_start(tegra->phy, tegra->port_speed);
/* Enable host mode */
tdi_reset(ehci);
/* Enable Port Power */
val = readl(&hw->port_status[0]);
val |= PORT_POWER;
writel(val, &hw->port_status[0]);
udelay(10);
/* Check if the phy resume from LP0. When the phy resume from LP0
* USB register will be reset. */
if (!readl(&hw->async_next)) {
/* Program the field PTC based on the saved speed mode */
val = readl(&hw->port_status[0]);
val &= ~PORT_TEST(~0);
if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_HIGH)
val |= PORT_TEST_FORCE;
else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_FULL)
val |= PORT_TEST(6);
else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
val |= PORT_TEST(7);
writel(val, &hw->port_status[0]);
udelay(10);
/* Disable test mode by setting PTC field to NORMAL_OP */
val = readl(&hw->port_status[0]);
val &= ~PORT_TEST(~0);
writel(val, &hw->port_status[0]);
udelay(10);
}
/* Poll until CCS is enabled */
if (handshake(ehci, &hw->port_status[0], PORT_CONNECT,
PORT_CONNECT, 2000)) {
pr_err("%s: timeout waiting for PORT_CONNECT\n", __func__);
goto restart;
}
/* Poll until PE is enabled */
if (handshake(ehci, &hw->port_status[0], PORT_PE,
PORT_PE, 2000)) {
pr_err("%s: timeout waiting for USB_PORTSC1_PE\n", __func__);
goto restart;
}
/* Clear the PCI status, to avoid an interrupt taken upon resume */
val = readl(&hw->status);
val |= STS_PCD;
writel(val, &hw->status);
/* Put controller in suspend mode by writing 1 to SUSP bit of PORTSC */
val = readl(&hw->port_status[0]);
if ((val & PORT_POWER) && (val & PORT_PE)) {
val |= PORT_SUSPEND;
writel(val, &hw->port_status[0]);
/* Wait until port suspend completes */
if (handshake(ehci, &hw->port_status[0], PORT_SUSPEND,
PORT_SUSPEND, 1000)) {
pr_err("%s: timeout waiting for PORT_SUSPEND\n",
__func__);
goto restart;
}
}
tegra_ehci_phy_restore_end(tegra->phy);
goto done;
restart:
if (tegra->port_speed <= TEGRA_USB_PHY_PORT_SPEED_HIGH)
tegra_ehci_phy_restore_end(tegra->phy);
tegra_ehci_restart(hcd);
done:
tegra_usb_phy_preresume(tegra->phy);
tegra->port_resuming = 1;
return 0;
}
static int tegra_ehci_suspend(struct device *dev)
{
struct tegra_ehci_hcd *tegra =
platform_get_drvdata(to_platform_device(dev));
struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
int rc = 0;
/*
* When system sleep is supported and USB controller wakeup is
* implemented: If the controller is runtime-suspended and the
* wakeup setting needs to be changed, call pm_runtime_resume().
*/
if (HCD_HW_ACCESSIBLE(hcd))
rc = controller_suspend(dev);
return rc;
}
static int tegra_ehci_resume(struct device *dev)
{
int rc;
rc = controller_resume(dev);
if (rc == 0) {
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
return rc;
}
static int tegra_ehci_runtime_suspend(struct device *dev)
{
return controller_suspend(dev);
}
static int tegra_ehci_runtime_resume(struct device *dev)
{
return controller_resume(dev);
}
static const struct dev_pm_ops tegra_ehci_pm_ops = {
.suspend = tegra_ehci_suspend,
.resume = tegra_ehci_resume,
.runtime_suspend = tegra_ehci_runtime_suspend,
.runtime_resume = tegra_ehci_runtime_resume,
};
#endif
static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32); static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
static int tegra_ehci_probe(struct platform_device *pdev) static int tegra_ehci_probe(struct platform_device *pdev)
@ -722,7 +753,6 @@ static int tegra_ehci_probe(struct platform_device *pdev)
} }
tegra->host_resumed = 1; tegra->host_resumed = 1;
tegra->power_down_on_bus_suspend = pdata->power_down_on_bus_suspend;
tegra->ehci = hcd_to_ehci(hcd); tegra->ehci = hcd_to_ehci(hcd);
irq = platform_get_irq(pdev, 0); irq = platform_get_irq(pdev, 0);
@ -746,6 +776,14 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto fail; goto fail;
} }
pm_runtime_set_active(&pdev->dev);
pm_runtime_get_noresume(&pdev->dev);
/* Don't skip the pm_runtime_forbid call if wakeup isn't working */
/* if (!pdata->power_down_on_bus_suspend) */
pm_runtime_forbid(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
return err; return err;
fail: fail:
@ -772,33 +810,6 @@ static int tegra_ehci_probe(struct platform_device *pdev)
return err; return err;
} }
#ifdef CONFIG_PM
static int tegra_ehci_resume(struct platform_device *pdev)
{
struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
if (tegra->bus_suspended)
return 0;
return tegra_usb_resume(hcd);
}
static int tegra_ehci_suspend(struct platform_device *pdev, pm_message_t state)
{
struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
if (tegra->bus_suspended)
return 0;
if (time_before(jiffies, tegra->ehci->next_statechange))
msleep(10);
return tegra_usb_suspend(hcd);
}
#endif
static int tegra_ehci_remove(struct platform_device *pdev) static int tegra_ehci_remove(struct platform_device *pdev)
{ {
struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev); struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
@ -807,6 +818,10 @@ static int tegra_ehci_remove(struct platform_device *pdev)
if (tegra == NULL || hcd == NULL) if (tegra == NULL || hcd == NULL)
return -EINVAL; return -EINVAL;
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
#ifdef CONFIG_USB_OTG_UTILS #ifdef CONFIG_USB_OTG_UTILS
if (tegra->transceiver) { if (tegra->transceiver) {
otg_set_host(tegra->transceiver->otg, NULL); otg_set_host(tegra->transceiver->otg, NULL);
@ -847,13 +862,12 @@ static struct of_device_id tegra_ehci_of_match[] __devinitdata = {
static struct platform_driver tegra_ehci_driver = { static struct platform_driver tegra_ehci_driver = {
.probe = tegra_ehci_probe, .probe = tegra_ehci_probe,
.remove = tegra_ehci_remove, .remove = tegra_ehci_remove,
#ifdef CONFIG_PM
.suspend = tegra_ehci_suspend,
.resume = tegra_ehci_resume,
#endif
.shutdown = tegra_ehci_hcd_shutdown, .shutdown = tegra_ehci_hcd_shutdown,
.driver = { .driver = {
.name = "tegra-ehci", .name = "tegra-ehci",
.of_match_table = tegra_ehci_of_match, .of_match_table = tegra_ehci_of_match,
#ifdef CONFIG_PM
.pm = &tegra_ehci_pm_ops,
#endif
} }
}; };