static int s5p_ehci_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = s5p_ehci->hcd;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
unsigned long flags;
int rc = 0;
#ifdef CONFIG_MDM_HSIC_PM
if (check_udev_suspend_allowed(hsic_pm_dev) > 0) {
set_host_stat(hsic_pm_dev, POWER_OFF);
if (wait_dev_pwr_stat(hsic_pm_dev, POWER_OFF) < 0) {
set_host_stat(hsic_pm_dev, POWER_ON);
pm_runtime_resume(&pdev->dev);
return -EBUSY;
}
} else {
pm_runtime_resume(&pdev->dev);
return -EBUSY;
}
#endif
if (time_before(jiffies, ehci->next_statechange))
msleep(10);
/* Root hub was already suspended. Disable irq emission and
* mark HW unaccessible, bail out if RH has been resumed. Use
* the spinlock to properly synchronize with possible pending
* RH suspend or resume activity.
*
* This is still racy as hcd->state is manipulated outside of
* any locks =P But that will be a different fix.
*/
spin_lock_irqsave(&ehci->lock, flags);
if (hcd->state != HC_STATE_SUSPENDED && hcd->state != HC_STATE_HALT) {
spin_unlock_irqrestore(&ehci->lock, flags);
return -EINVAL;
}
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore(&ehci->lock, flags);
if (pdata && pdata->phy_exit)
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB)
if (pdata && pdata->noti_host_states)
pdata->noti_host_states(pdev, S5P_HOST_OFF);
#endif
clk_disable(s5p_ehci->clk);
return rc;
}
static int s5p_ehci_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = s5p_ehci->hcd;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int rc = 0;
if (dev->power.is_suspended)
return 0;
#ifdef CONFIG_MDM_HSIC_PM
request_active_lock_set(hsic_pm_dev);
#endif
/* platform device isn't suspended */
if (pdata && pdata->phy_resume)
rc = pdata->phy_resume(pdev, S5P_USB_PHY_HOST);
if (rc) {
s5p_ehci_configurate(hcd);
/* emptying the schedule aborts any urbs */
spin_lock_irq(&ehci->lock);
if (ehci->reclaim)
end_unlink_async(ehci);
ehci_work(ehci);
spin_unlock_irq(&ehci->lock);
usb_root_hub_lost_power(hcd->self.root_hub);
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
/* here we "know" root ports should always stay powered */
ehci_port_power(ehci, 1);
hcd->state = HC_STATE_SUSPENDED;
#ifdef CONFIG_MDM_HSIC_PM
set_host_stat(hsic_pm_dev, POWER_ON);
wait_dev_pwr_stat(hsic_pm_dev, POWER_ON);
#endif
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB) \
|| defined(CONFIG_MDM_HSIC_PM)
s5p_wait_for_cp_resume(pdev, hcd);
#endif
}
return 0;
}
static int __devinit s5p_ehci_probe(struct platform_device *pdev)
{
struct s5p_ehci_platdata *pdata;
struct s5p_ehci_hcd *s5p_ehci;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
int irq;
int err;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "No platform data defined\n");
return -EINVAL;
}
s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
if (!s5p_ehci)
return -ENOMEM;
s5p_ehci->dev = &pdev->dev;
hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
dev_err(&pdev->dev, "Unable to create HCD\n");
err = -ENOMEM;
goto fail_hcd;
}
s5p_ehci->hcd = hcd;
s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");
if (IS_ERR(s5p_ehci->clk)) {
dev_err(&pdev->dev, "Failed to get usbhost clock\n");
err = PTR_ERR(s5p_ehci->clk);
goto fail_clk;
}
err = clk_enable(s5p_ehci->clk);
if (err)
goto fail_clken;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get I/O memory\n");
err = -ENXIO;
goto fail_io;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = ioremap(res->start, resource_size(res));
if (!hcd->regs) {
dev_err(&pdev->dev, "Failed to remap I/O memory\n");
err = -ENOMEM;
goto fail_io;
}
irq = platform_get_irq(pdev, 0);
if (!irq) {
dev_err(&pdev->dev, "Failed to get IRQ\n");
err = -ENODEV;
goto fail;
}
platform_set_drvdata(pdev, s5p_ehci);
s5p_ehci_phy_init(pdev);
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = readl(&ehci->caps->hcs_params);
err = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (err) {
dev_err(&pdev->dev, "Failed to add USB HCD\n");
goto fail;
}
create_ehci_sys_file(ehci);
s5p_ehci->power_on = 1;
#ifdef CONFIG_USB_SUSPEND
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
#endif
#ifdef CONFIG_MDM_HSIC_PM
/* halt controller before driving suspend on ths bus */
ehci->susp_sof_bug = 1;
set_host_stat(hsic_pm_dev, POWER_ON);
pm_runtime_allow(&pdev->dev);
pm_runtime_set_autosuspend_delay(&hcd->self.root_hub->dev, 0);
pm_runtime_forbid(&pdev->dev);
enable_periodic(ehci);
#endif
#ifdef CONFIG_EHCI_IRQ_DISTRIBUTION
if (num_possible_cpus() > 1) {
s5p_ehci_irq_no = irq;
s5p_ehci_irq_cpu = s5p_ehci_cpus[num_possible_cpus() - 1];
irq_set_affinity(s5p_ehci_irq_no, cpumask_of(s5p_ehci_irq_cpu));
register_cpu_notifier(&s5p_ehci_cpu_notifier);
}
#endif
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB)
/* for cp enumeration */
pm_runtime_forbid(&pdev->dev);
/*HSIC IPC control the ACTIVE_STATE*/
if (pdata && pdata->noti_host_states)
pdata->noti_host_states(pdev, S5P_HOST_ON);
#endif
return 0;
fail:
iounmap(hcd->regs);
fail_io:
clk_disable(s5p_ehci->clk);
fail_clken:
clk_put(s5p_ehci->clk);
fail_clk:
usb_put_hcd(hcd);
fail_hcd:
kfree(s5p_ehci);
return err;
}
static int s5p_ehci_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = s5p_ehci->hcd;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
clk_enable(s5p_ehci->clk);
pm_runtime_resume(&pdev->dev);
s5p_ehci_phy_init(pdev);
/* if EHCI was off, hcd was removed */
if (!s5p_ehci->power_on) {
dev_info(dev, "Nothing to do for the device (power off)\n");
return 0;
}
if (time_before(jiffies, ehci->next_statechange))
msleep(10);
/* Mark hardware accessible again as we are out of D3 state by now */
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
int mask = INTR_MASK;
if (!hcd->self.root_hub->do_remote_wakeup)
mask &= ~STS_PCD;
ehci_writel(ehci, mask, &ehci->regs->intr_enable);
ehci_readl(ehci, &ehci->regs->intr_enable);
return 0;
}
ehci_dbg(ehci, "lost power, restarting\n");
usb_root_hub_lost_power(hcd->self.root_hub);
(void) ehci_halt(ehci);
(void) ehci_reset(ehci);
/* emptying the schedule aborts any urbs */
spin_lock_irq(&ehci->lock);
if (ehci->reclaim)
end_unlink_async(ehci);
ehci_work(ehci);
spin_unlock_irq(&ehci->lock);
ehci_writel(ehci, ehci->command, &ehci->regs->command);
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
/* here we "know" root ports should always stay powered */
ehci_port_power(ehci, 1);
hcd->state = HC_STATE_SUSPENDED;
#ifdef CONFIG_MDM_HSIC_PM
set_host_stat(hsic_pm_dev, POWER_ON);
wait_dev_pwr_stat(hsic_pm_dev, POWER_ON);
#endif
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB) \
|| defined(CONFIG_MDM_HSIC_PM)
s5p_wait_for_cp_resume(pdev, hcd);
#endif
return 0;
}
static int __devinit s5p_ehci_probe(struct platform_device *pdev)
{
struct s5p_ehci_platdata *pdata;
struct s5p_ehci_hcd *s5p_ehci;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
int irq;
int err;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "No platform data defined\n");
return -EINVAL;
}
s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
if (!s5p_ehci)
return -ENOMEM;
s5p_ehci->dev = &pdev->dev;
hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
dev_err(&pdev->dev, "Unable to create HCD\n");
err = -ENOMEM;
goto fail_hcd;
}
s5p_ehci->hcd = hcd;
s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");
if (IS_ERR(s5p_ehci->clk)) {
dev_err(&pdev->dev, "Failed to get usbhost clock\n");
err = PTR_ERR(s5p_ehci->clk);
goto fail_clk;
}
err = clk_enable(s5p_ehci->clk);
if (err)
goto fail_clken;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get I/O memory\n");
err = -ENXIO;
goto fail_io;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = ioremap(res->start, resource_size(res));
if (!hcd->regs) {
dev_err(&pdev->dev, "Failed to remap I/O memory\n");
err = -ENOMEM;
goto fail_io;
}
irq = platform_get_irq(pdev, 0);
if (!irq) {
dev_err(&pdev->dev, "Failed to get IRQ\n");
err = -ENODEV;
goto fail;
}
platform_set_drvdata(pdev, s5p_ehci);
s5p_ehci_phy_init(pdev);
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = readl(&ehci->caps->hcs_params);
err = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (err) {
dev_err(&pdev->dev, "Failed to add USB HCD\n");
goto fail;
}
/*
* EHCI root hubs are expected to handle remote wakeup.
* So, wakeup flag init defaults for root hubs.
*/
device_wakeup_enable(&hcd->self.root_hub->dev);
create_ehci_sys_file(ehci);
s5p_ehci->power_on = 1;
#ifdef CONFIG_USB_SUSPEND
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get(hcd->self.controller);
#endif
#ifdef CONFIG_MDM_HSIC_PM
/* halt controller before driving suspend on ths bus */
ehci->susp_sof_bug = 1;
set_host_stat(hsic_pm_dev, POWER_ON);
/* pm_runtime_allow(&pdev->dev); */
pm_runtime_set_autosuspend_delay(&hcd->self.root_hub->dev, 0);
pm_runtime_forbid(&pdev->dev);
enable_periodic(ehci);
#endif
return 0;
fail:
iounmap(hcd->regs);
fail_io:
clk_disable(s5p_ehci->clk);
fail_clken:
clk_put(s5p_ehci->clk);
fail_clk:
usb_put_hcd(hcd);
fail_hcd:
kfree(s5p_ehci);
return err;
}
static int s5p_ehci_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
struct usb_hcd *hcd = s5p_ehci->hcd;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
unsigned long flags;
int rc = 0;
#ifdef CONFIG_MDM_HSIC_PM
/*
* check suspend returns 1 if it is possible to suspend
* otherwise, it returns 0 impossible or returns some error
*/
rc = check_udev_suspend_allowed(hsic_pm_dev);
if (rc > 0) {
set_host_stat(hsic_pm_dev, POWER_OFF);
if (wait_dev_pwr_stat(hsic_pm_dev, POWER_OFF) < 0) {
set_host_stat(hsic_pm_dev, POWER_ON);
pm_runtime_resume(&pdev->dev);
return -EBUSY;
}
} else if (rc == -ENODEV) {
/* no hsic pm driver loaded, proceed suspend */
pr_debug("%s: suspend without hsic pm\n", __func__);
} else {
pm_runtime_resume(&pdev->dev);
return -EBUSY;
}
rc = 0;
#endif
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB)
rc = get_hostwake_state();
if (rc) {
pr_info("%s: suspend fail by host wakeup irq\n", __func__);
pm_runtime_resume(&pdev->dev);
return -EBUSY;
}
#endif
if (time_before(jiffies, ehci->next_statechange))
usleep_range(10000, 11000);
/* Root hub was already suspended. Disable irq emission and
* mark HW unaccessible, bail out if RH has been resumed. Use
* the spinlock to properly synchronize with possible pending
* RH suspend or resume activity.
*
* This is still racy as hcd->state is manipulated outside of
* any locks =P But that will be a different fix.
*/
spin_lock_irqsave(&ehci->lock, flags);
if (hcd->state != HC_STATE_SUSPENDED && hcd->state != HC_STATE_HALT) {
spin_unlock_irqrestore(&ehci->lock, flags);
return -EINVAL;
}
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore(&ehci->lock, flags);
if (pdata && pdata->phy_exit)
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
#if defined(CONFIG_LINK_DEVICE_HSIC) || defined(CONFIG_LINK_DEVICE_USB)
set_host_states(0);
#endif
clk_disable(s5p_ehci->clk);
return rc;
}
