int ehci_power_control(struct device *dev, int force_enable,const char *buf)
{
struct platform_device *pdev;
if(dev ) pdev = to_platform_device(dev);
else pdev = &s5p_device_ehci;
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;
int power_on;
int irq;
int retval;
if(dev){
if (sscanf(buf, "%d", &power_on) != 1)
return -EINVAL;
device_lock(dev);
pm_runtime_get_sync(dev);
}else{
power_on = force_enable;
}
if (!power_on && s5p_ehci->power_on) {
printk(KERN_DEBUG "%s: EHCI turns off\n", __func__);
s5p_ehci->power_on = 0;
usb_remove_hcd(hcd);
if (pdata && pdata->phy_exit)
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
} else if (power_on) {
printk(KERN_DEBUG "%s: EHCI turns on\n", __func__);
if (s5p_ehci->power_on) {
usb_remove_hcd(hcd);
}
if (pdata && pdata->phy_init)
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
s5p_ehci_configurate(hcd);
irq = platform_get_irq(pdev, 0);
retval = usb_add_hcd(hcd, irq,
IRQF_DISABLED | IRQF_SHARED);
if (retval < 0) {
dev_err(dev, "Power On Fail\n");
goto exit;
}
s5p_ehci->power_on = 1;
}
exit:
if(dev){
pm_runtime_put_sync(dev);
device_unlock(dev);
}
return 0;
}
static int s5p_ehci_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);
clk_enable(s5p_ehci->clk);
pm_runtime_resume(&pdev->dev);
if (pdata->phy_init)
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
s5p_ehci_configurate(hcd);
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;
return 0;
}
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;
/* 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;
#if 0//def CONFIG_USB_EXYNOS_SWITCH
} else {
if (1) //samsung_board_rev_is_0_0()) /* the same board configuration that Mehmet DVT has */
{
ehci_hub_control(ehci_to_hcd(ehci),
SetPortFeature,
USB_PORT_FEAT_POWER,
1, NULL, 0);
/* Flush those writes */
ehci_readl(ehci, &ehci->regs->command);
msleep(20);
}
#endif
}
return 0;
}
static void s5p_ehci_phy_init(struct platform_device *pdev)
{
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;
if (pdata && pdata->phy_init) {
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
s5p_ehci_configurate(hcd);
}
}
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 void s5p_ehci_phy_init(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
if (s5p_ehci->phy) {
usb_phy_init(s5p_ehci->phy);
s5p_ehci->post_lpa_resume = 0;
} else if (s5p_ehci->pdata->phy_init) {
s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
} else {
dev_err(&pdev->dev, "Failed to init ehci phy\n");
return;
}
s5p_ehci_configurate(hcd);
}
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;
/* 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;
}
#if defined(CONFIG_LINK_DEVICE_HSIC)
pr_info("%s: usage=%d, child=%d\n", __func__,
atomic_read(&dev->power.usage_count),
atomic_read(&dev->power.child_count));
#endif
return 0;
}
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 usb_hcd *hcd = platform_get_drvdata(pdev);
struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
int rc = 0;
if (dev->power.is_suspended)
return 0;
dev_dbg(dev, "%s\n", __func__);
if (s5p_ehci->phy) {
struct usb_phy *phy = s5p_ehci->phy;
if (s5p_ehci->post_lpa_resume)
usb_phy_init(phy);
pm_runtime_get_sync(phy->dev);
} else if (pdata && pdata->phy_resume) {
rc = pdata->phy_resume(pdev, USB_PHY_TYPE_HOST);
s5p_ehci->post_lpa_resume = !!rc;
}
if (s5p_ehci->post_lpa_resume)
s5p_ehci_configurate(hcd);
ehci_resume(hcd, false);
/*
* REVISIT: in case of LPA bus won't be resumed, so we do it here.
* Alternatively, we can try to setup HC in such a way that it starts
* to sense connections. In this case, root hub will be resumed from
* interrupt (ehci_irq()).
*/
if (s5p_ehci->post_lpa_resume)
usb_hcd_resume_root_hub(hcd);
s5p_ehci->post_lpa_resume = 0;
return 0;
}
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;
/* 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);
ehci->rh_state = EHCI_RH_SUSPENDED;
}
return 0;
}
static void s5p_ehci_phy_init(struct platform_device *pdev)
{
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;
u32 delay_count = 0;
if (pdata && pdata->phy_init) {
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
while (!readl(hcd->regs) && delay_count < 200) {
delay_count++;
udelay(1);
}
if (delay_count)
dev_info(&pdev->dev, "waiting time = %d\n",
delay_count);
s5p_ehci_configurate(hcd);
dev_dbg(&pdev->dev, "%s : 0x%x\n", __func__,
readl(INSNREG00(hcd->regs)));
}
}
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;
}
if (pdata->phy_init)
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
s5p_ehci_configurate(hcd);
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;
}
platform_set_drvdata(pdev, s5p_ehci);
create_ehci_sys_file(ehci);
s5p_ehci->power_on = 1;
#if 0//def CONFIG_USB_EXYNOS_SWITCH
if (1) //samsung_board_rev_is_0_0()) /* the same board configuration that Mehmet DVT has */
ehci_hub_control(ehci_to_hcd(ehci),
ClearPortFeature,
USB_PORT_FEAT_POWER,
1, NULL, 0);
#endif
#ifdef CONFIG_USB_SUSPEND
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
#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;
}