usb: renesas_usbhs: expand USB-DMAC channels for R-Car Gen2

This patch expands USB-DMAC channels for R-Car Gen2 SoCs. The SoCs
have 4 channels. If d{2,3}_{t,x}x_id are not set, this driver never
uses the expanded USB-DMAC channels.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 11 insertions, 1 deletions

diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index c45667f942b6..0427cdd1a483 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -102,6 +102,10 @@ struct usbhs_priv;
 #define DEVADD8         0x00E0
 #define DEVADD9         0x00E2
 #define DEVADDA         0x00E4
+#define D2FIFOSEL       0x00F0  /* for R-Car Gen2 */
+#define D2FIFOCTR       0x00F2  /* for R-Car Gen2 */
+#define D3FIFOSEL       0x00F4  /* for R-Car Gen2 */
+#define D3FIFOCTR       0x00F6  /* for R-Car Gen2 */
 
 /* SYSCFG */
 #define SCKE    (1 << 10)       /* USB Module Clock Enable */
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index bc9a0506b54e..f46271ce1b15 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -1234,6 +1234,8 @@ int usbhs_fifo_probe(struct usbhs_priv *priv)
         /* DFIFO */
         USBHS_DFIFO_INIT(priv, fifo, 0);
         USBHS_DFIFO_INIT(priv, fifo, 1);
+        USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2);
+        USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3);
 
         return 0;
 }
diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h
index 899729ac085f..f07037c1185f 100644
--- a/drivers/usb/renesas_usbhs/fifo.h
+++ b/drivers/usb/renesas_usbhs/fifo.h
@@ -38,7 +38,7 @@ struct usbhs_fifo {
         struct sh_dmae_slave    rx_slave;
 };
 
-#define USBHS_MAX_NUM_DFIFO     2
+#define USBHS_MAX_NUM_DFIFO     4
 struct usbhs_fifo_info {
         struct usbhs_fifo cfifo;
         struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h
index d5952bb66752..9fd9e481ea98 100644
--- a/include/linux/usb/renesas_usbhs.h
+++ b/include/linux/usb/renesas_usbhs.h
@@ -145,6 +145,10 @@ struct renesas_usbhs_driver_param {
         int d0_rx_id;
         int d1_tx_id;
         int d1_rx_id;
+        int d2_tx_id;
+        int d2_rx_id;
+        int d3_tx_id;
+        int d3_rx_id;
 
         /*
          * option: