[U-Boot] [PATCH 06/17] drivers: usb: musb: add ti musb host driver with driver model support

[Mugunthan V N]

Add a TI MUSB host driver with driver model support and the
driver will be bound by the MUSB wrapper driver based on the
dr_mode device tree entry.

Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
---
 drivers/usb/musb-new/ti-musb.c | 191 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 191 insertions(+)

diff --git a/drivers/usb/musb-new/ti-musb.c b/drivers/usb/musb-new/ti-musb.c
index c1a4952..adc68e6 100644
--- a/drivers/usb/musb-new/ti-musb.c
+++ b/drivers/usb/musb-new/ti-musb.c
@@ -14,10 +14,195 @@
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 
+#include <asm/io.h>
+#include <asm/omap_musb.h>
+#include "musb_uboot.h"
+
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_DM_USB
 
+/* USB 2.0 PHY Control */
+#define CM_PHY_PWRDN			(1 << 0)
+#define CM_PHY_OTG_PWRDN		(1 << 1)
+#define OTGVDET_EN			(1 << 19)
+#define OTGSESSENDEN			(1 << 20)
+
+#define AM335X_USB1_CTRL	0x8
+
+struct ti_musb_platdata {
+	void *base;
+	void *ctrl_mod_base;
+	struct musb_hdrc_platform_data plat;
+	struct musb_hdrc_config musb_config;
+	struct omap_musb_board_data otg_board_data;
+};
+
+static int ti_musb_get_usb_index(int node)
+{
+	const void *fdt = gd->fdt_blob;
+	int i = 0;
+	char path[64];
+	const char *alias_path;
+	char alias[16];
+
+	fdt_get_path(fdt, node, path, sizeof(path));
+
+	do {
+		snprintf(alias, sizeof(alias), "usb%d", i);
+		alias_path = fdt_get_alias(fdt, alias);
+		if (alias_path == NULL) {
+			debug("USB index not found\n");
+			return -ENOENT;
+		}
+
+		if (!strcmp(path, alias_path))
+			return i;
+
+		i++;
+	} while (alias_path);
+
+	return -ENOENT;
+}
+
+static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
+{
+	struct ti_musb_platdata *platdata = dev_get_platdata(dev);
+
+	if (on) {
+		clrsetbits_le32(platdata->ctrl_mod_base,
+				CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
+				OTGVDET_EN | OTGSESSENDEN);
+	} else {
+		clrsetbits_le32(platdata->ctrl_mod_base, 0,
+				CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
+	}
+}
+
+static int ti_musb_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ti_musb_platdata *platdata = dev_get_platdata(dev);
+	const void *fdt = gd->fdt_blob;
+	int node = dev->of_offset;
+	int phys;
+	int ctrl_mod;
+	int usb_index;
+
+	platdata->base = (void *)dev_get_addr_index(dev, 1);
+
+	phys = fdtdec_lookup_phandle(fdt, node, "phys");
+	ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
+	platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
+	usb_index = ti_musb_get_usb_index(node);
+	switch (usb_index) {
+	case 1:
+		platdata->ctrl_mod_base += AM335X_USB1_CTRL;
+	case 0:
+	default:
+		break;
+	}
+
+	platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
+							  "mentor,multipoint",
+							  -1);
+	if (platdata->musb_config.multipoint < 0) {
+		error("MUSB multipoint DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->musb_config.dyn_fifo = 1;
+
+	platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
+						       "mentor,num-eps", -1);
+	if (platdata->musb_config.num_eps < 0) {
+		error("MUSB num-eps DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
+							"mentor,ram-bits", -1);
+	if (platdata->musb_config.ram_bits < 0) {
+		error("MUSB ram-bits DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power;
+	platdata->otg_board_data.dev = dev;
+	platdata->plat.config = &platdata->musb_config;
+
+	platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
+	if (platdata->plat.power < 0) {
+		error("MUSB mentor,power DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->plat.platform_ops = &musb_dsps_ops;
+	platdata->plat.board_data = &platdata->otg_board_data;
+
+	return 0;
+}
+
+static int ti_musb_host_probe(struct udevice *dev)
+{
+	struct musb_host_data *host = dev_get_priv(dev);
+	struct ti_musb_platdata *platdata = dev_get_platdata(dev);
+	struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
+	struct omap_musb_board_data *otg_board_data;
+	int ret;
+
+	priv->desc_before_addr = true;
+
+	otg_board_data = &platdata->otg_board_data;
+
+	host->host = musb_init_controller(&platdata->plat,
+					  (struct device *)otg_board_data,
+					  platdata->base);
+	if (!host->host)
+		return -EIO;
+
+	ret = musb_lowlevel_init(host);
+
+	return ret;
+}
+
+static int ti_musb_host_remove(struct udevice *dev)
+{
+	struct musb_host_data *host = dev_get_priv(dev);
+
+	musb_stop(host->host);
+
+	return 0;
+}
+
+static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ti_musb_platdata *platdata = dev_get_platdata(dev);
+	const void *fdt = gd->fdt_blob;
+	int node = dev->of_offset;
+	int ret;
+
+	ret = ti_musb_ofdata_to_platdata(dev);
+	if (ret) {
+		error("platdata dt parse error\n");
+		return ret;
+	}
+
+	platdata->plat.mode = MUSB_HOST;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(ti_musb_host) = {
+	.name	= "ti-musb-host",
+	.id	= UCLASS_USB,
+	.ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
+	.probe = ti_musb_host_probe,
+	.remove = ti_musb_host_remove,
+	.ops	= &musb_usb_ops,
+	.platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
+	.priv_auto_alloc_size = sizeof(struct musb_host_data),
+};
+
 static const char *const usb_dr_modes[] = {
 	[USB_DR_MODE_UNKNOWN]		= "",
 	[USB_DR_MODE_HOST]		= "host",
@@ -66,6 +251,12 @@ static int ti_musb_wrapper_bind(struct udevice *parent)
 			break;
 		case USB_DR_MODE_HOST:
 			/* Bind MUSB host */
+			ret = device_bind_driver_to_node(parent, "ti-musb-host",
+							 name, node, &dev);
+			if (ret) {
+				error("musb - not able to bind usb host node\n");
+				return ret;
+			}
 			break;
 		default:
 			break;
-- 
2.7.2.333.g70bd996