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OMAP: USB : Fix the EHCI enumeration and core retention issue
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This commit 354ab85 titled
"Fix OMAP EHCI suspend/resume failure (i693)" is causing
the usb hub and device detection fails in beagle XM
causeing NFS not functional. This affects the core retention too.
The same commit logic needs to be revisted adhering to hwmod and
device tree framework.
for now, this commit id 354ab85
titled "Fix OMAP EHCI suspend/resume failure (i693)" reverted.

This patch is validated on BeagleXM with NFS support over
usb ethernet and USB mass storage and other device detection.

Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: stable <stable@vger.kernel.org> # 3.5
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Keshava Munegowda authored and Greg Kroah-Hartman committed Aug 10, 2012
1 parent 71a5e61 commit 872c495
Showing 1 changed file with 1 addition and 166 deletions.
167 changes: 1 addition & 166 deletions drivers/usb/host/ehci-omap.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -56,15 +56,6 @@
#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0

/* Errata i693 */
static struct clk *utmi_p1_fck;
static struct clk *utmi_p2_fck;
static struct clk *xclk60mhsp1_ck;
static struct clk *xclk60mhsp2_ck;
static struct clk *usbhost_p1_fck;
static struct clk *usbhost_p2_fck;
static struct clk *init_60m_fclk;

/*-------------------------------------------------------------------------*/

static const struct hc_driver ehci_omap_hc_driver;
Expand All @@ -80,40 +71,6 @@ static inline u32 ehci_read(void __iomem *base, u32 reg)
return __raw_readl(base + reg);
}

/* Erratum i693 workaround sequence */
static void omap_ehci_erratum_i693(struct ehci_hcd *ehci)
{
int ret = 0;

/* Switch to the internal 60 MHz clock */
ret = clk_set_parent(utmi_p1_fck, init_60m_fclk);
if (ret != 0)
ehci_err(ehci, "init_60m_fclk set parent"
"failed error:%d\n", ret);

ret = clk_set_parent(utmi_p2_fck, init_60m_fclk);
if (ret != 0)
ehci_err(ehci, "init_60m_fclk set parent"
"failed error:%d\n", ret);

clk_enable(usbhost_p1_fck);
clk_enable(usbhost_p2_fck);

/* Wait 1ms and switch back to the external clock */
mdelay(1);
ret = clk_set_parent(utmi_p1_fck, xclk60mhsp1_ck);
if (ret != 0)
ehci_err(ehci, "xclk60mhsp1_ck set parent"
"failed error:%d\n", ret);

ret = clk_set_parent(utmi_p2_fck, xclk60mhsp2_ck);
if (ret != 0)
ehci_err(ehci, "xclk60mhsp2_ck set parent"
"failed error:%d\n", ret);

clk_disable(usbhost_p1_fck);
clk_disable(usbhost_p2_fck);
}

static void omap_ehci_soft_phy_reset(struct usb_hcd *hcd, u8 port)
{
Expand Down Expand Up @@ -195,50 +152,6 @@ static int omap_ehci_init(struct usb_hcd *hcd)
return rc;
}

static int omap_ehci_hub_control(
struct usb_hcd *hcd,
u16 typeReq,
u16 wValue,
u16 wIndex,
char *buf,
u16 wLength
)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
u32 __iomem *status_reg = &ehci->regs->port_status[
(wIndex & 0xff) - 1];
u32 temp;
unsigned long flags;
int retval = 0;

spin_lock_irqsave(&ehci->lock, flags);

if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
temp = ehci_readl(ehci, status_reg);
if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
retval = -EPIPE;
goto done;
}

temp &= ~PORT_WKCONN_E;
temp |= PORT_WKDISC_E | PORT_WKOC_E;
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);

omap_ehci_erratum_i693(ehci);

set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
goto done;
}

spin_unlock_irqrestore(&ehci->lock, flags);

/* Handle the hub control events here */
return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
done:
spin_unlock_irqrestore(&ehci->lock, flags);
return retval;
}

static void disable_put_regulator(
struct ehci_hcd_omap_platform_data *pdata)
{
Expand Down Expand Up @@ -351,79 +264,9 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
goto err_pm_runtime;
}

/* get clocks */
utmi_p1_fck = clk_get(dev, "utmi_p1_gfclk");
if (IS_ERR(utmi_p1_fck)) {
ret = PTR_ERR(utmi_p1_fck);
dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
goto err_add_hcd;
}

xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
if (IS_ERR(xclk60mhsp1_ck)) {
ret = PTR_ERR(xclk60mhsp1_ck);
dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
goto err_utmi_p1_fck;
}

utmi_p2_fck = clk_get(dev, "utmi_p2_gfclk");
if (IS_ERR(utmi_p2_fck)) {
ret = PTR_ERR(utmi_p2_fck);
dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
goto err_xclk60mhsp1_ck;
}

xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
if (IS_ERR(xclk60mhsp2_ck)) {
ret = PTR_ERR(xclk60mhsp2_ck);
dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
goto err_utmi_p2_fck;
}

usbhost_p1_fck = clk_get(dev, "usb_host_hs_utmi_p1_clk");
if (IS_ERR(usbhost_p1_fck)) {
ret = PTR_ERR(usbhost_p1_fck);
dev_err(dev, "usbhost_p1_fck failed error:%d\n", ret);
goto err_xclk60mhsp2_ck;
}

usbhost_p2_fck = clk_get(dev, "usb_host_hs_utmi_p2_clk");
if (IS_ERR(usbhost_p2_fck)) {
ret = PTR_ERR(usbhost_p2_fck);
dev_err(dev, "usbhost_p2_fck failed error:%d\n", ret);
goto err_usbhost_p1_fck;
}

init_60m_fclk = clk_get(dev, "init_60m_fclk");
if (IS_ERR(init_60m_fclk)) {
ret = PTR_ERR(init_60m_fclk);
dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
goto err_usbhost_p2_fck;
}

return 0;

err_usbhost_p2_fck:
clk_put(usbhost_p2_fck);

err_usbhost_p1_fck:
clk_put(usbhost_p1_fck);

err_xclk60mhsp2_ck:
clk_put(xclk60mhsp2_ck);

err_utmi_p2_fck:
clk_put(utmi_p2_fck);

err_xclk60mhsp1_ck:
clk_put(xclk60mhsp1_ck);

err_utmi_p1_fck:
clk_put(utmi_p1_fck);

err_add_hcd:
usb_remove_hcd(hcd);

err_pm_runtime:
disable_put_regulator(pdata);
pm_runtime_put_sync(dev);
Expand Down Expand Up @@ -454,14 +297,6 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
iounmap(hcd->regs);
usb_put_hcd(hcd);

clk_put(utmi_p1_fck);
clk_put(utmi_p2_fck);
clk_put(xclk60mhsp1_ck);
clk_put(xclk60mhsp2_ck);
clk_put(usbhost_p1_fck);
clk_put(usbhost_p2_fck);
clk_put(init_60m_fclk);

pm_runtime_put_sync(dev);
pm_runtime_disable(dev);

Expand Down Expand Up @@ -532,7 +367,7 @@ static const struct hc_driver ehci_omap_hc_driver = {
* root hub support
*/
.hub_status_data = ehci_hub_status_data,
.hub_control = omap_ehci_hub_control,
.hub_control = ehci_hub_control,
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,

Expand Down

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