diff options
Diffstat (limited to 'drivers/usb/musb/musb_cppi41.c')
| -rw-r--r-- | drivers/usb/musb/musb_cppi41.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index 5a9b977fbc19..2a535b70af21 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -9,9 +9,9 @@ #define RNDIS_REG(x) (0x80 + ((x - 1) * 4)) -#define EP_MODE_AUTOREG_NONE 0 -#define EP_MODE_AUTOREG_ALL_NEOP 1 -#define EP_MODE_AUTOREG_ALWAYS 3 +#define EP_MODE_AUTOREQ_NONE 0 +#define EP_MODE_AUTOREQ_ALL_NEOP 1 +#define EP_MODE_AUTOREQ_ALWAYS 3 #define EP_MODE_DMA_TRANSPARENT 0 #define EP_MODE_DMA_RNDIS 1 @@ -396,19 +396,19 @@ static bool cppi41_configure_channel(struct dma_channel *channel, /* auto req */ cppi41_set_autoreq_mode(cppi41_channel, - EP_MODE_AUTOREG_ALL_NEOP); + EP_MODE_AUTOREQ_ALL_NEOP); } else { musb_writel(musb->ctrl_base, RNDIS_REG(cppi41_channel->port_num), 0); cppi41_set_dma_mode(cppi41_channel, EP_MODE_DMA_TRANSPARENT); cppi41_set_autoreq_mode(cppi41_channel, - EP_MODE_AUTOREG_NONE); + EP_MODE_AUTOREQ_NONE); } } else { /* fallback mode */ cppi41_set_dma_mode(cppi41_channel, EP_MODE_DMA_TRANSPARENT); - cppi41_set_autoreq_mode(cppi41_channel, EP_MODE_AUTOREG_NONE); + cppi41_set_autoreq_mode(cppi41_channel, EP_MODE_AUTOREQ_NONE); len = min_t(u32, packet_sz, len); } cppi41_channel->prog_len = len; @@ -541,10 +541,18 @@ static int cppi41_dma_channel_abort(struct dma_channel *channel) csr &= ~MUSB_TXCSR_DMAENAB; musb_writew(epio, MUSB_TXCSR, csr); } else { + cppi41_set_autoreq_mode(cppi41_channel, EP_MODE_AUTOREQ_NONE); + + /* delay to drain to cppi dma pipeline for isoch */ + udelay(250); + csr = musb_readw(epio, MUSB_RXCSR); csr &= ~(MUSB_RXCSR_H_REQPKT | MUSB_RXCSR_DMAENAB); musb_writew(epio, MUSB_RXCSR, csr); + /* wait to drain cppi dma pipe line */ + udelay(50); + csr = musb_readw(epio, MUSB_RXCSR); if (csr & MUSB_RXCSR_RXPKTRDY) { csr |= MUSB_RXCSR_FLUSHFIFO; @@ -558,13 +566,14 @@ static int cppi41_dma_channel_abort(struct dma_channel *channel) tdbit <<= 16; do { - musb_writel(musb->ctrl_base, USB_TDOWN, tdbit); + if (is_tx) + musb_writel(musb->ctrl_base, USB_TDOWN, tdbit); ret = dmaengine_terminate_all(cppi41_channel->dc); } while (ret == -EAGAIN); - musb_writel(musb->ctrl_base, USB_TDOWN, tdbit); - if (is_tx) { + musb_writel(musb->ctrl_base, USB_TDOWN, tdbit); + csr = musb_readw(epio, MUSB_TXCSR); if (csr & MUSB_TXCSR_TXPKTRDY) { csr |= MUSB_TXCSR_FLUSHFIFO; @@ -600,7 +609,7 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller) { struct musb *musb = controller->musb; struct device *dev = musb->controller; - struct device_node *np = dev->of_node; + struct device_node *np = dev->parent->of_node; struct cppi41_dma_channel *cppi41_channel; int count; int i; @@ -650,7 +659,7 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller) musb_dma->status = MUSB_DMA_STATUS_FREE; musb_dma->max_len = SZ_4M; - dc = dma_request_slave_channel(dev, str); + dc = dma_request_slave_channel(dev->parent, str); if (!dc) { dev_err(dev, "Failed to request %s.\n", str); ret = -EPROBE_DEFER; @@ -680,7 +689,7 @@ struct dma_controller *dma_controller_create(struct musb *musb, struct cppi41_dma_controller *controller; int ret = 0; - if (!musb->controller->of_node) { + if (!musb->controller->parent->of_node) { dev_err(musb->controller, "Need DT for the DMA engine.\n"); return NULL; } |