diff options
Diffstat (limited to 'drivers/usb/musb/blackfin.c')
| -rw-r--r-- | drivers/usb/musb/blackfin.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c index 9d49d1cd7ce2..8e2a1ff8a35a 100644 --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -21,6 +21,7 @@ #include <asm/cacheflush.h> #include "musb_core.h" +#include "musbhsdma.h" #include "blackfin.h" struct bfin_glue { @@ -322,7 +323,7 @@ static void bfin_musb_try_idle(struct musb *musb, unsigned long timeout) mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); } -static int bfin_musb_get_vbus_status(struct musb *musb) +static int bfin_musb_vbus_status(struct musb *musb) { return 0; } @@ -332,6 +333,27 @@ static int bfin_musb_set_mode(struct musb *musb, u8 musb_mode) return -EIO; } +static int bfin_musb_adjust_channel_params(struct dma_channel *channel, + u16 packet_sz, u8 *mode, + dma_addr_t *dma_addr, u32 *len) +{ + struct musb_dma_channel *musb_channel = channel->private_data; + + /* + * Anomaly 05000450 might cause data corruption when using DMA + * MODE 1 transmits with short packet. So to work around this, + * we truncate all MODE 1 transfers down to a multiple of the + * max packet size, and then do the last short packet transfer + * (if there is any) using MODE 0. + */ + if (ANOMALY_05000450) { + if (musb_channel->transmit && *mode == 1) + *len = *len - (*len % packet_sz); + } + + return 0; +} + static void bfin_musb_reg_init(struct musb *musb) { if (ANOMALY_05000346) { @@ -430,6 +452,8 @@ static const struct musb_platform_ops bfin_ops = { .vbus_status = bfin_musb_vbus_status, .set_vbus = bfin_musb_set_vbus, + + .adjust_channel_params = bfin_musb_adjust_channel_params, }; static u64 bfin_dmamask = DMA_BIT_MASK(32); @@ -540,7 +564,7 @@ static struct dev_pm_ops bfin_pm_ops = { .resume = bfin_resume, }; -#define DEV_PM_OPS &bfin_pm_op, +#define DEV_PM_OPS &bfin_pm_ops #else #define DEV_PM_OPS NULL #endif @@ -548,7 +572,7 @@ static struct dev_pm_ops bfin_pm_ops = { static struct platform_driver bfin_driver = { .remove = __exit_p(bfin_remove), .driver = { - .name = "musb-bfin", + .name = "musb-blackfin", .pm = DEV_PM_OPS, }, }; |