usb: gadget: r8a66597-udc: add support for SUDMAC

SH7757 has a USB function with internal DMA controller (SUDMAC).
This patch supports the SUDMAC. The SUDMAC is incompatible with
general-purpose DMAC. So, it doesn't use dmaengine.

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

1 files changed, 60 insertions, 0 deletions

diff --git a/include/linux/usb/r8a66597.h b/include/linux/usb/r8a66597.h
index b6b8660d0c68..55805f9dcf21 100644
--- a/include/linux/usb/r8a66597.h
+++ b/include/linux/usb/r8a66597.h
@@ -48,6 +48,9 @@ struct r8a66597_platdata {
 
         /* (external controller only) set one = WR0_N shorted to WR1_N */
         unsigned        wr0_shorted_to_wr1:1;
+
+        /* set one = using SUDMAC */
+        unsigned        sudmac:1;
 };
 
 /* Register definitions */
@@ -417,5 +420,62 @@ struct r8a66597_platdata {
 #define USBSPD          0x00C0
 #define RTPORT          0x0001
 
+/* SUDMAC registers */
+#define CH0CFG          0x00
+#define CH1CFG          0x04
+#define CH0BA           0x10
+#define CH1BA           0x14
+#define CH0BBC          0x18
+#define CH1BBC          0x1C
+#define CH0CA           0x20
+#define CH1CA           0x24
+#define CH0CBC          0x28
+#define CH1CBC          0x2C
+#define CH0DEN          0x30
+#define CH1DEN          0x34
+#define DSTSCLR         0x38
+#define DBUFCTRL        0x3C
+#define DINTCTRL        0x40
+#define DINTSTS         0x44
+#define DINTSTSCLR      0x48
+#define CH0SHCTRL       0x50
+#define CH1SHCTRL       0x54
+
+/* SUDMAC Configuration Registers */
+#define SENDBUFM        0x1000 /* b12: Transmit Buffer Mode */
+#define RCVENDM         0x0100 /* b8: Receive Data Transfer End Mode */
+#define LBA_WAIT        0x0030 /* b5-4: Local Bus Access Wait */
+
+/* DMA Enable Registers */
+#define DEN             0x0001 /* b1: DMA Transfer Enable */
+
+/* DMA Status Clear Register */
+#define CH1STCLR        0x0002 /* b2: Ch1 DMA Status Clear */
+#define CH0STCLR        0x0001 /* b1: Ch0 DMA Status Clear */
+
+/* DMA Buffer Control Register */
+#define CH1BUFW         0x0200 /* b9: Ch1 DMA Buffer Data Transfer Enable */
+#define CH0BUFW         0x0100 /* b8: Ch0 DMA Buffer Data Transfer Enable */
+#define CH1BUFS         0x0002 /* b2: Ch1 DMA Buffer Data Status */
+#define CH0BUFS         0x0001 /* b1: Ch0 DMA Buffer Data Status */
+
+/* DMA Interrupt Control Register */
+#define CH1ERRE         0x0200 /* b9: Ch1 SHwy Res Err Detect Int Enable */
+#define CH0ERRE         0x0100 /* b8: Ch0 SHwy Res Err Detect Int Enable */
+#define CH1ENDE         0x0002 /* b2: Ch1 DMA Transfer End Int Enable */
+#define CH0ENDE         0x0001 /* b1: Ch0 DMA Transfer End Int Enable */
+
+/* DMA Interrupt Status Register */
+#define CH1ERRS         0x0200 /* b9: Ch1 SHwy Res Err Detect Int Status */
+#define CH0ERRS         0x0100 /* b8: Ch0 SHwy Res Err Detect Int Status */
+#define CH1ENDS         0x0002 /* b2: Ch1 DMA Transfer End Int Status */
+#define CH0ENDS         0x0001 /* b1: Ch0 DMA Transfer End Int Status */
+
+/* DMA Interrupt Status Clear Register */
+#define CH1ERRC         0x0200 /* b9: Ch1 SHwy Res Err Detect Int Stat Clear */
+#define CH0ERRC         0x0100 /* b8: Ch0 SHwy Res Err Detect Int Stat Clear */
+#define CH1ENDC         0x0002 /* b2: Ch1 DMA Transfer End Int Stat Clear */
+#define CH0ENDC         0x0001 /* b1: Ch0 DMA Transfer End Int Stat Clear */
+
 #endif /* __LINUX_USB_R8A66597_H */