static int msm_ehci_phy_reset(struct msm_hcd *mhcd)
{
struct usb_hcd *hcd = mhcd_to_hcd(mhcd);
struct msm_usb_host_platform_data *pdata;
u32 val;
int ret;
ret = msm_ehci_link_clk_reset(mhcd, 1);
if (ret)
return ret;
/* Minimum 10msec delay for block reset as per hardware spec */
usleep_range(10000, 12000);
ret = msm_ehci_link_clk_reset(mhcd, 0);
if (ret)
return ret;
pdata = mhcd->dev->platform_data;
if (pdata && pdata->use_sec_phy)
/* select secondary phy if offset is set for USB operation */
writel_relaxed(readl_relaxed(USB_PHY_CTRL2) | (1<<16),
USB_PHY_CTRL2);
val = readl_relaxed(USB_PORTSC) & ~PORTSC_PTS_MASK;
writel_relaxed(val | PORTSC_PTS_ULPI, USB_PORTSC);
dev_info(mhcd->dev, "phy_reset: success\n");
return 0;
}
static int msm_ehci_phy_reset(struct msm_hcd *mhcd)
{
struct usb_hcd *hcd = mhcd_to_hcd(mhcd);
u32 val;
int ret;
int retries;
ret = msm_ehci_link_clk_reset(mhcd, 1);
if (ret)
return ret;
udelay(1);
ret = msm_ehci_link_clk_reset(mhcd, 0);
if (ret)
return ret;
val = readl_relaxed(USB_PORTSC) & ~PORTSC_PTS_MASK;
writel_relaxed(val | PORTSC_PTS_ULPI, USB_PORTSC);
for (retries = 3; retries > 0; retries--) {
ret = msm_ulpi_write(mhcd, ULPI_FUNC_CTRL_SUSPENDM,
ULPI_CLR(ULPI_FUNC_CTRL));
if (!ret)
break;
}
if (!retries)
return -ETIMEDOUT;
/* Wakeup the PHY with a reg-access for calibration */
for (retries = 3; retries > 0; retries--) {
ret = msm_ulpi_read(mhcd, ULPI_DEBUG);
if (ret != -ETIMEDOUT)
break;
}
if (!retries)
return -ETIMEDOUT;
dev_info(mhcd->dev, "phy_reset: success\n");
return 0;
}
