diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2015-03-29 12:50:47 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-05-26 10:38:24 -0500 |
| commit | 591fa9dd3fee3de8c729febca395beb75c8ee819 (patch) | |
| tree | 4865918e64a577f41203c2a85768c62992d659c4 /drivers/usb/musb | |
| parent | 672bfdaa310004368a0d493478e2a40f2f2f914f (diff) | |
| download | linux-591fa9dd3fee3de8c729febca395beb75c8ee819.tar.bz2 | |
usb: musb: Add pre and post root port reset end callbacks
The sunxi otg phy has a bug where it wrongly detects a high speed squelch
when reset on the root port gets de-asserted with a lo-speed device.
The workaround for this is to disable squelch detect before de-asserting
reset, and re-enabling it after the reset de-assert is done.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_core.h | 16 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_virthub.c | 2 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index c7a0d933eff9..71172266c65e 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -167,6 +167,8 @@ struct musb_io; * @vbus_status: returns vbus status if possible * @set_vbus: forces vbus status * @adjust_channel_params: pre check for standard dma channel_program func + * @pre_root_reset_end: called before the root usb port reset flag gets cleared + * @post_root_reset_end: called after the root usb port reset flag gets cleared */ struct musb_platform_ops { @@ -210,6 +212,8 @@ struct musb_platform_ops { int (*adjust_channel_params)(struct dma_channel *channel, u16 packet_sz, u8 *mode, dma_addr_t *dma_addr, u32 *len); + void (*pre_root_reset_end)(struct musb *musb); + void (*post_root_reset_end)(struct musb *musb); }; /* @@ -595,4 +599,16 @@ static inline int musb_platform_exit(struct musb *musb) return musb->ops->exit(musb); } +static inline void musb_platform_pre_root_reset_end(struct musb *musb) +{ + if (musb->ops->pre_root_reset_end) + musb->ops->pre_root_reset_end(musb); +} + +static inline void musb_platform_post_root_reset_end(struct musb *musb) +{ + if (musb->ops->post_root_reset_end) + musb->ops->post_root_reset_end(musb); +} + #endif /* __MUSB_CORE_H__ */ diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c index 86c4b533e90b..30842bc195f5 100644 --- a/drivers/usb/musb/musb_virthub.c +++ b/drivers/usb/musb/musb_virthub.c @@ -195,8 +195,10 @@ void musb_port_reset(struct musb *musb, bool do_reset) msecs_to_jiffies(50)); } else { dev_dbg(musb->controller, "root port reset stopped\n"); + musb_platform_pre_root_reset_end(musb); musb_writeb(mbase, MUSB_POWER, power & ~MUSB_POWER_RESET); + musb_platform_post_root_reset_end(musb); power = musb_readb(mbase, MUSB_POWER); if (power & MUSB_POWER_HSMODE) { |