From b4dc38fd45b63e3da2bc98db5d283a15a637a2fa Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 26 Feb 2015 14:02:35 -0600 Subject: [PATCH] usb: musb: core: simplify musb_recover_work() we're not resetting musb at all, just restarting the session. This means we don't need to touch PHYs or VBUS or anything like that. Just make sure session bit is reenabled after MUSB dropped it. while at that, make sure to tell usbcore that we're dropping the session and, thus, disconnecting the device. Tested-by: Bin Liu Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_core.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 96d71fa2ae85..979bc2b0550f 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1835,7 +1835,8 @@ static void musb_irq_work(struct work_struct *data) static void musb_recover_work(struct work_struct *data) { struct musb *musb = container_of(data, struct musb, recover_work.work); - int status, ret; + int ret; + u8 devctl; ret = musb_platform_reset(musb); if (ret) { @@ -1843,23 +1844,25 @@ static void musb_recover_work(struct work_struct *data) return; } - usb_phy_vbus_off(musb->xceiv); - usleep_range(100, 200); + /* drop session bit */ + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + devctl &= ~MUSB_DEVCTL_SESSION; + musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); - usb_phy_vbus_on(musb->xceiv); - usleep_range(100, 200); + /* tell usbcore about it */ + musb_root_disconnect(musb); /* * When a babble condition occurs, the musb controller * removes the session bit and the endpoint config is lost. */ if (musb->dyn_fifo) - status = ep_config_from_table(musb); + ret = ep_config_from_table(musb); else - status = ep_config_from_hw(musb); + ret = ep_config_from_hw(musb); - /* start the session again */ - if (status == 0) + /* restart session */ + if (ret == 0) musb_start(musb); } -- 2.11.0