Enable the isochrounous IN handling for AM335x HOST.
Reprogram CPPI to receive consecutive ISOCH frames in the same URB.
Signed-off-by: George Cherian <george.cher...@ti.com>
---
drivers/usb/musb/musb_host.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index ed45572..5b6482c 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1689,9 +1689,11 @@ void musb_host_rx(struct musb *musb, u8 epnum)
| MUSB_RXCSR_H_AUTOREQ
| MUSB_RXCSR_AUTOCLEAR
| MUSB_RXCSR_RXPKTRDY);
+
musb_writew(hw_ep->regs, MUSB_RXCSR, val);
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
+#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
+ defined(CONFIG_USB_TI_CPPI41_DMA)
if (usb_pipeisoc(pipe)) {
struct usb_iso_packet_descriptor *d;
@@ -1706,8 +1708,28 @@ void musb_host_rx(struct musb *musb, u8 epnum)
if (++qh->iso_idx >= urb->number_of_packets)
done = true;
- else
+ else {
+#if defined(CONFIG_USB_TI_CPPI41_DMA)
+ struct dma_controller *c;
+ dma_addr_t *buf;
+ u32 length, ret;
+
+ c = musb->dma_controller;
+ buf = (void *)
+ urb->iso_frame_desc[qh->iso_idx].offset
+ + (u32)urb->transfer_dma;
+
+ length =
+ urb->iso_frame_desc[qh->iso_idx].length;
+
+ val |= MUSB_RXCSR_DMAENAB;
+ musb_writew(hw_ep->regs, MUSB_RXCSR, val);
+
+ ret = c->channel_program(dma, qh->maxpacket,
+ 0, (u32) buf, length);
+#endif
done = false;
+ }
} else {
/* done if urb buffer is full or short packet is recd */
@@ -1747,7 +1769,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
}
/* we are expecting IN packets */
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
+#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
+ defined(CONFIG_USB_TI_CPPI41_DMA)
if (dma) {
struct dma_controller *c;
u16 rx_count;
--
1.8.1
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