diff options
| author | Felipe Balbi <balbi@ti.com> | 2015-02-26 23:00:52 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-03-10 23:33:28 +0300 |
| commit | 011d0dd5400b84e593eecfc4a17fcfb6c0c5ac60 (patch) | |
| tree | 3df67d75726e3ff53e182cab8d065bb2d09c23aa /drivers/usb/musb/musb_dsps.c | |
| parent | d5fa3e9f7398adf337f03fa3257d5e9b214078ee (diff) | |
| download | linux-011d0dd5400b84e593eecfc4a17fcfb6c0c5ac60.tar.xz | |
usb: musb: dsps: do not reset musb on babble
All we have to do is, really, drop session bit
and let the session restart.
Big thanks goes to Bin Liu <b-liu@ti.com> for
inspiring this work.
Tested-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_dsps.c')
| -rw-r--r-- | drivers/usb/musb/musb_dsps.c | 23 |
1 files changed, 2 insertions, 21 deletions
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 85ebfa2c3858..a159de1225f3 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -604,31 +604,12 @@ static int dsps_musb_reset(struct musb *musb) { struct device *dev = musb->controller; struct dsps_glue *glue = dev_get_drvdata(dev->parent); - const struct dsps_musb_wrapper *wrp = glue->wrp; - int session_restart = 0, error; + int session_restart = 0; if (glue->sw_babble_enabled) session_restart = dsps_sw_babble_control(musb); - /* - * In case of new silicon version babble condition can be recovered - * without resetting the MUSB. But for older silicon versions, MUSB - * reset is needed - */ - if (session_restart || !glue->sw_babble_enabled) { - dev_info(musb->controller, "Restarting MUSB to recover from Babble\n"); - dsps_writel(musb->ctrl_base, wrp->control, (1 << wrp->reset)); - usleep_range(100, 200); - usb_phy_shutdown(musb->xceiv); - error = phy_power_off(musb->phy); - if (error) - dev_err(dev, "phy shutdown failed: %i\n", error); - usleep_range(100, 200); - usb_phy_init(musb->xceiv); - error = phy_power_on(musb->phy); - if (error) - dev_err(dev, "phy powerup failed: %i\n", error); + else session_restart = 1; - } return session_restart ? 0 : -EPIPE; } |