usb: musb: sunxi: add support for the variant in H3/V3s SoC

Allwinner H3/V3s features a variant of MUSB controller, which lacks one
endpoint.

Add support for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
[b-liu@ti.com: added usb: to commit subject prefix]
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt

@@ -2,8 +2,8 @@ Allwinner sun4i A10 musb DRC/OTG controller
 -------------------------------------------
 
 Required properties:
- - compatible      : "allwinner,sun4i-a10-musb", "allwinner,sun6i-a31-musb"
-                     or "allwinner,sun8i-a33-musb"
+ - compatible      : "allwinner,sun4i-a10-musb", "allwinner,sun6i-a31-musb",
+                     "allwinner,sun8i-a33-musb" or "allwinner,sun8i-h3-musb"
  - reg             : mmio address range of the musb controller
  - clocks          : clock specifier for the musb controller ahb gate clock
  - reset           : reset specifier for the ahb reset (A31 and newer only)

drivers/usb/musb/sunxi.c

@@ -639,6 +639,20 @@ static struct musb_fifo_cfg sunxi_musb_mode_cfg[] = {
 	MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
 };
 
+/* H3/V3s OTG supports only 4 endpoints */
+#define SUNXI_MUSB_MAX_EP_NUM_H3	5
+
+static struct musb_fifo_cfg sunxi_musb_mode_cfg_h3[] = {
+	MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
+};
+
 static const struct musb_hdrc_config sunxi_musb_hdrc_config = {
 	.fifo_cfg       = sunxi_musb_mode_cfg,
 	.fifo_cfg_size  = ARRAY_SIZE(sunxi_musb_mode_cfg),
@@ -650,6 +664,18 @@ static const struct musb_hdrc_config sunxi_musb_hdrc_config = {
 	.dma		= 0,
 };
 
+static struct musb_hdrc_config sunxi_musb_hdrc_config_h3 = {
+	.fifo_cfg       = sunxi_musb_mode_cfg_h3,
+	.fifo_cfg_size  = ARRAY_SIZE(sunxi_musb_mode_cfg_h3),
+	.multipoint	= true,
+	.dyn_fifo	= true,
+	.soft_con       = true,
+	.num_eps	= SUNXI_MUSB_MAX_EP_NUM_H3,
+	.ram_bits	= SUNXI_MUSB_RAM_BITS,
+	.dma		= 0,
+};
+
+
 static int sunxi_musb_probe(struct platform_device *pdev)
 {
 	struct musb_hdrc_platform_data	pdata;
@@ -692,7 +718,10 @@ static int sunxi_musb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 	pdata.platform_ops	= &sunxi_musb_ops;
-	pdata.config		= &sunxi_musb_hdrc_config;
+	if (!of_device_is_compatible(np, "allwinner,sun8i-h3-musb"))
+		pdata.config = &sunxi_musb_hdrc_config;
+	else
+		pdata.config = &sunxi_musb_hdrc_config_h3;
 
 	glue->dev = &pdev->dev;
 	INIT_WORK(&glue->work, sunxi_musb_work);
@@ -704,7 +733,8 @@ static int sunxi_musb_probe(struct platform_device *pdev)
 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb"))
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 
-	if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb")) {
+	if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb") ||
+	    of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) {
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 		set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags);
 	}
@@ -798,6 +828,7 @@ static const struct of_device_id sunxi_musb_match[] = {
 	{ .compatible = "allwinner,sun4i-a10-musb", },
 	{ .compatible = "allwinner,sun6i-a31-musb", },
 	{ .compatible = "allwinner,sun8i-a33-musb", },
+	{ .compatible = "allwinner,sun8i-h3-musb", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, sunxi_musb_match);