3 files changed, 106 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 77f1adc2a4fc..72ad3758bd40 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -488,6 +488,8 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
 	usbhs_pipe_data_sequence(pipe, pkt->sequence);
 	pkt->sequence = -1; /* -1 sequence will be ignored */
 
+	usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
+
 	ret = usbhsf_fifo_select(pipe, fifo, 1);
 	if (ret < 0)
 		return 0;
@@ -594,6 +596,7 @@ static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
 	usbhs_pipe_data_sequence(pipe, pkt->sequence);
 	pkt->sequence = -1; /* -1 sequence will be ignored */
 
+	usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
 	usbhs_pipe_enable(pipe);
 	usbhsf_rx_irq_ctrl(pipe, 1);
 
@@ -795,6 +798,7 @@ static void xfer_work(struct work_struct *work)
 	dev_dbg(dev, "  %s %d (%d/ %d)\n",
 		fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
 
+	usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
 	usbhsf_dma_start(pipe, fifo);
 	dma_async_issue_pending(chan);
 }
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
index 122526cfd32b..7926e1c700f1 100644
--- a/drivers/usb/renesas_usbhs/pipe.c
+++ b/drivers/usb/renesas_usbhs/pipe.c
@@ -93,6 +93,82 @@ static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 }
 
 /*
+ *		PIPEnTRN/PIPEnTRE functions
+ */
+static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
+	struct device *dev = usbhs_priv_to_dev(priv);
+	int num = usbhs_pipe_number(pipe);
+	u16 reg;
+
+	/*
+	 * It is impossible to calculate address,
+	 * since PIPEnTRN addresses were mapped randomly.
+	 */
+#define CASE_PIPExTRN(a)		\
+	case 0x ## a:			\
+		reg = PIPE ## a ## TRN;	\
+		break;
+
+	switch (num) {
+	CASE_PIPExTRN(1);
+	CASE_PIPExTRN(2);
+	CASE_PIPExTRN(3);
+	CASE_PIPExTRN(4);
+	CASE_PIPExTRN(5);
+	CASE_PIPExTRN(B);
+	CASE_PIPExTRN(C);
+	CASE_PIPExTRN(D);
+	CASE_PIPExTRN(E);
+	CASE_PIPExTRN(F);
+	CASE_PIPExTRN(9);
+	CASE_PIPExTRN(A);
+	default:
+		dev_err(dev, "unknown pipe (%d)\n", num);
+		return;
+	}
+	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
+}
+
+static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
+	struct device *dev = usbhs_priv_to_dev(priv);
+	int num = usbhs_pipe_number(pipe);
+	u16 reg;
+
+	/*
+	 * It is impossible to calculate address,
+	 * since PIPEnTRE addresses were mapped randomly.
+	 */
+#define CASE_PIPExTRE(a)			\
+	case 0x ## a:				\
+		reg = PIPE ## a ## TRE;		\
+		break;
+
+	switch (num) {
+	CASE_PIPExTRE(1);
+	CASE_PIPExTRE(2);
+	CASE_PIPExTRE(3);
+	CASE_PIPExTRE(4);
+	CASE_PIPExTRE(5);
+	CASE_PIPExTRE(B);
+	CASE_PIPExTRE(C);
+	CASE_PIPExTRE(D);
+	CASE_PIPExTRE(E);
+	CASE_PIPExTRE(F);
+	CASE_PIPExTRE(9);
+	CASE_PIPExTRE(A);
+	default:
+		dev_err(dev, "unknown pipe (%d)\n", num);
+		return;
+	}
+
+	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
+}
+
+/*
  *		PIPEBUF
  */
 static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
@@ -264,6 +340,31 @@ int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
 	return (int)(pid == PID_STALL10 || pid == PID_STALL11);
 }
 
+void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
+{
+	if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
+		return;
+
+	/*
+	 * clear and disable transfer counter for IN/OUT pipe
+	 */
+	usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
+
+	/*
+	 * Only IN direction bulk pipe can use transfer count.
+	 * Without using this function,
+	 * received data will break if it was large data size.
+	 * see PIPEnTRN/PIPEnTRE for detail
+	 */
+	if (usbhs_pipe_is_dir_in(pipe)) {
+		int maxp = usbhs_pipe_get_maxpacket(pipe);
+
+		usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
+		usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
+	}
+}
+
+
 /*
  *		pipe setup
  */
diff --git a/drivers/usb/renesas_usbhs/pipe.h b/drivers/usb/renesas_usbhs/pipe.h
index 08786c06dcf1..01b1820eccc5 100644
--- a/drivers/usb/renesas_usbhs/pipe.h
+++ b/drivers/usb/renesas_usbhs/pipe.h
@@ -88,6 +88,7 @@ void usbhs_pipe_enable(struct usbhs_pipe *pipe);
 void usbhs_pipe_disable(struct usbhs_pipe *pipe);
 void usbhs_pipe_stall(struct usbhs_pipe *pipe);
 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe);
+void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len);
 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo);
 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
 			      u16 epnum, u16 maxp);