diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/renesas_usbhs/pipe.c | 29 |
1 files changed, 13 insertions, 16 deletions
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c index 5897ddad05f..bc4521c5426 100644 --- a/drivers/usb/renesas_usbhs/pipe.c +++ b/drivers/usb/renesas_usbhs/pipe.c @@ -183,7 +183,6 @@ static void usbhsp_pipe_select(struct usbhs_pipe *pipe) static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe) { struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe); - struct device *dev = usbhs_priv_to_dev(priv); int timeout = 1024; u16 val; @@ -206,6 +205,7 @@ static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe) * - "Pipe Control Registers Switching Procedure" */ usbhs_write(priv, CFIFOSEL, 0); + usbhs_fifo_disable(pipe); do { val = usbhsp_pipectrl_get(pipe); @@ -217,21 +217,6 @@ static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe) } while (timeout--); - /* - * force NAK - */ - timeout = 1024; - usbhs_fifo_disable(pipe); - do { - val = usbhsp_pipectrl_get(pipe); - val &= PBUSY; - if (!val) - return 0; - - } while (timeout--); - - dev_err(dev, "pipe barrier failed\n"); - return -EBUSY; } @@ -270,10 +255,22 @@ static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe) void usbhs_fifo_disable(struct usbhs_pipe *pipe) { + int timeout = 1024; + u16 val; + /* see "Pipe n Control Register" - "PID" */ __usbhsp_pid_try_nak_if_stall(pipe); usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK); + + do { + val = usbhsp_pipectrl_get(pipe); + val &= PBUSY; + if (!val) + break; + + udelay(10); + } while (timeout--); } void usbhs_fifo_enable(struct usbhs_pipe *pipe) |