diff options
| author | Tony LIU <junjie.liu@freescale.com> | 2011-12-30 14:07:18 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2012-07-20 13:19:41 +0800 |
| commit | 634ce4b337f4e3f5e215d676446fce815ff2562b (patch) | |
| tree | 2e4a811264cd39338fdf6622a453ffa0e537dfe3 /arch/arm/mach-mx6/usb_dr.c | |
| parent | 93ace1dd80cf386fbd12e1730630ca5eccd3f535 (diff) | |
ENGR00171027-1 [USB_HOST]after plug in/out on the hub,host can't work
This issue will happen only when suspend bit is set but phcd is not set
The root cause of this issue is the IC defect.
- If the suspend bit is set without phcd bit set, host controller
can't resume normally
- The workaround is after set suspend bit, we need set the following
bit in USB PHY at once:
HW_USBPHY_PWD_RXPWDRX
HW_USBPHY_PWD_RXPWDDIFF
HW_USBPHY_PWD_RXPWD1PT1
HW_USBPHY_PWD_RXPWDENV
HW_USBPHY_PWD_TXPWDv2I
HW_USBPHY_PWD_TXPWDIBIAS
HW_USBPHY_PWD_TXPWDFS
- Furthermore, after resume, we must clear these bits during the K state
- IC has no plan to fix this issue
- This issue only happen on MX6Q/MX28
MSL part
Signed-off-by: Tony LIU <junjie.liu@freescale.com>
Diffstat (limited to 'arch/arm/mach-mx6/usb_dr.c')
| -rw-r--r-- | arch/arm/mach-mx6/usb_dr.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-mx6/usb_dr.c b/arch/arm/mach-mx6/usb_dr.c index de84a4ded23b..fb241f517c39 100644 --- a/arch/arm/mach-mx6/usb_dr.c +++ b/arch/arm/mach-mx6/usb_dr.c @@ -310,6 +310,36 @@ static void usbotg_wakeup_event_clear(void) #ifdef CONFIG_USB_EHCI_ARC_OTG /* Beginning of host related operation for DR port */ +static void _host_platform_suspend(struct fsl_usb2_platform_data *pdata) +{ + void __iomem *phy_reg = MX6_IO_ADDRESS(USB_PHY0_BASE_ADDR); + u32 tmp; + + tmp = (BM_USBPHY_PWD_TXPWDFS + | BM_USBPHY_PWD_TXPWDIBIAS + | BM_USBPHY_PWD_TXPWDV2I + | BM_USBPHY_PWD_RXPWDENV + | BM_USBPHY_PWD_RXPWD1PT1 + | BM_USBPHY_PWD_RXPWDDIFF + | BM_USBPHY_PWD_RXPWDRX); + __raw_writel(tmp, phy_reg + HW_USBPHY_PWD_SET); +} + +static void _host_platform_resume(struct fsl_usb2_platform_data *pdata) +{ + void __iomem *phy_reg = MX6_IO_ADDRESS(USB_PHY0_BASE_ADDR); + u32 tmp; + + tmp = (BM_USBPHY_PWD_TXPWDFS + | BM_USBPHY_PWD_TXPWDIBIAS + | BM_USBPHY_PWD_TXPWDV2I + | BM_USBPHY_PWD_RXPWDENV + | BM_USBPHY_PWD_RXPWD1PT1 + | BM_USBPHY_PWD_RXPWDDIFF + | BM_USBPHY_PWD_RXPWDRX); + __raw_writel(tmp, phy_reg + HW_USBPHY_PWD_CLR); +} + static void _host_phy_lowpower_suspend(struct fsl_usb2_platform_data *pdata, bool enable) { __phy_lowpower_suspend(pdata, enable, ENABLED_BY_HOST); @@ -438,6 +468,8 @@ void __init mx6_usb_dr_init(void) #ifdef CONFIG_USB_EHCI_ARC_OTG dr_utmi_config.operating_mode = DR_HOST_MODE; dr_utmi_config.wake_up_enable = _host_wakeup_enable; + dr_utmi_config.platform_suspend = _host_platform_suspend; + dr_utmi_config.platform_resume = _host_platform_resume; dr_utmi_config.phy_lowpower_suspend = _host_phy_lowpower_suspend; dr_utmi_config.is_wakeup_event = _is_host_wakeup; dr_utmi_config.wakeup_pdata = &dr_wakeup_config; @@ -448,6 +480,8 @@ void __init mx6_usb_dr_init(void) #ifdef CONFIG_USB_GADGET_ARC dr_utmi_config.operating_mode = DR_UDC_MODE; dr_utmi_config.wake_up_enable = _device_wakeup_enable; + dr_utmi_config.platform_suspend = NULL; + dr_utmi_config.platform_resume = NULL; dr_utmi_config.phy_lowpower_suspend = _device_phy_lowpower_suspend; dr_utmi_config.is_wakeup_event = _is_device_wakeup; dr_utmi_config.wakeup_pdata = &dr_wakeup_config; |