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usb: otg: TWL6030: OMAP4430: Adding SRP VBUS pulsing API

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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>
This commit is contained in:
Hema HK 2011-03-22 16:54:21 +05:30 committed by Felipe Balbi
parent c51e36dc11
commit 603ab524ed
1 changed files with 15 additions and 0 deletions
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15
drivers/usb/otg/twl6030-usb.c
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@ -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);