diff options
| author | Hema HK <hemahk@ti.com> | 2011-03-22 16:54:21 +0530 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-05-13 14:43:55 +0300 |
| commit | 603ab524ed95f566b0f25566484d4f449e433d74 (patch) | |
| tree | e9f065e1fca07f2daec63bff4c823cc75e2e15b2 /drivers/usb/otg | |
| parent | c51e36dc11e44aa960744ec1c36fb2ab8d68b218 (diff) | |
usb: otg: TWL6030: OMAP4430: Adding SRP VBUS pulsing API
Implement the start_srp API to generate the VBUS pulsing and assign it to
otg_transciever function pointer. This will be used by the link driver when
there is SRP initiation from user.
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/otg')
| -rw-r--r-- | drivers/usb/otg/twl6030-usb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/otg/twl6030-usb.c b/drivers/usb/otg/twl6030-usb.c index 6e920de64ef6..3f2e07011a48 100644 --- a/drivers/usb/otg/twl6030-usb.c +++ b/drivers/usb/otg/twl6030-usb.c @@ -31,6 +31,7 @@ #include <linux/err.h> #include <linux/notifier.h> #include <linux/slab.h> +#include <linux/delay.h> /* usb register definitions */ #define USB_VENDOR_ID_LSB 0x00 @@ -188,6 +189,19 @@ static int twl6030_phy_suspend(struct otg_transceiver *x, int suspend) return 0; } +static int twl6030_start_srp(struct otg_transceiver *x) +{ + struct twl6030_usb *twl = xceiv_to_twl(x); + + twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET); + twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET); + + mdelay(100); + twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR); + + return 0; +} + static int twl6030_usb_ldo_init(struct twl6030_usb *twl) { @@ -403,6 +417,7 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev) twl->otg.init = twl6030_phy_init; twl->otg.shutdown = twl6030_phy_shutdown; twl->otg.set_suspend = twl6030_phy_suspend; + twl->otg.start_srp = twl6030_start_srp; /* init spinlock for workqueue */ spin_lock_init(&twl->lock); |