usb: musb-new: omap2430: Enable DM_USB and OF support

With upcoming changes that require CONFIG_BLK, this broke
USB Mass Storage on the OMAP3 boards because if CONFIG_BLK is
enabled, it assumes that DM_USB is enabled, but it wasn't yet
available on omap3 and omap4 boards.

This patch converts the OMAP2430 MUSB glue to support DM_USB and
extracts the necessary information based on the device tree.

It's based on the ti-musb driver, but there are enough significant
differences in both the architecture and device tree entires between
am33xx and OMAP3/OMAP4, that I think it makes sense to continue to
keep the separate.

Per doc/driver-model/usb-info.txt, the USB gadget stuff hasn't
migrated to DM_USB yet, so this only supports USB Host for now.

Users wanting USB Gadgets will need to disable DM_USB and leave
it the old way for now.

Signed-off-by: Adam Ford <aford173@gmail.com>

drivers/usb/musb-new/omap2430.c

@@ -9,14 +9,18 @@
  * This file is part of the Inventra Controller Driver for Linux.
  */
 #include <common.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <linux/usb/otg.h>
 #include <asm/omap_common.h>
 #include <asm/omap_musb.h>
 #include <twl4030.h>
 #include <twl6030.h>
 #include "linux-compat.h"
-
 #include "musb_core.h"
 #include "omap2430.h"
+#include "musb_uboot.h"
 
 static inline void omap2430_low_level_exit(struct musb *musb)
 {
@@ -43,6 +47,7 @@ static int omap2430_musb_init(struct musb *musb)
 	u32 l;
 	int status = 0;
 	unsigned long int start;
+
 	struct omap_musb_board_data *data =
 		(struct omap_musb_board_data *)musb->controller;
 
@@ -129,3 +134,146 @@ const struct musb_platform_ops omap2430_ops = {
 	.enable		= omap2430_musb_enable,
 	.disable	= omap2430_musb_disable,
 };
+
+#if defined(CONFIG_DM_USB)
+
+struct omap2430_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 omap2430_musb_ofdata_to_platdata(struct udevice *dev)
+{
+	struct omap2430_musb_platdata *platdata = dev_get_platdata(dev);
+	const void *fdt = gd->fdt_blob;
+	int node = dev_of_offset(dev);
+
+	platdata->base = (void *)dev_read_addr_ptr(dev);
+
+	platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
+							  "multipoint",
+							  -1);
+	if (platdata->musb_config.multipoint < 0) {
+		pr_err("MUSB multipoint DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->musb_config.dyn_fifo = 1;
+	platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
+						       "num-eps", -1);
+	if (platdata->musb_config.num_eps < 0) {
+		pr_err("MUSB num-eps DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
+							"ram-bits", -1);
+	if (platdata->musb_config.ram_bits < 0) {
+		pr_err("MUSB ram-bits DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->plat.power = fdtdec_get_int(fdt, node,
+								"power", -1);
+	if (platdata->plat.power < 0) {
+		pr_err("MUSB power DT entry missing\n");
+		return -ENOENT;
+	}
+
+	platdata->otg_board_data.interface_type = fdtdec_get_int(fdt, node,
+									"interface-type", -1);
+	if (platdata->otg_board_data.interface_type < 0) {
+		pr_err("MUSB interface-type DT entry missing\n");
+		return -ENOENT;
+	}
+
+#if 0 /* In a perfect world, mode would be set to OTG, mode 3 from DT */
+	platdata->plat.mode = fdtdec_get_int(fdt, node,
+										"mode", -1);
+	if (platdata->plat.mode < 0) {
+		pr_err("MUSB mode DT entry missing\n");
+		return -ENOENT;
+	}
+#else /* MUSB_OTG, it doesn't work */
+#ifdef CONFIG_USB_MUSB_HOST /* Host seems to be the only option that works */
+	platdata->plat.mode = MUSB_HOST;
+#else /* For that matter, MUSB_PERIPHERAL doesn't either */
+	platdata->plat.mode = MUSB_PERIPHERAL;
+#endif
+#endif
+	platdata->otg_board_data.dev = dev;
+	platdata->plat.config = &platdata->musb_config;
+	platdata->plat.platform_ops = &omap2430_ops;
+	platdata->plat.board_data = &platdata->otg_board_data;
+	return 0;
+}
+
+static int omap2430_musb_probe(struct udevice *dev)
+{
+#ifdef CONFIG_USB_MUSB_HOST
+	struct musb_host_data *host = dev_get_priv(dev);
+#endif
+	struct omap2430_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;
+	void *base = dev_read_addr_ptr(dev);
+
+	priv->desc_before_addr = true;
+
+	otg_board_data = &platdata->otg_board_data;
+
+#ifdef CONFIG_USB_MUSB_HOST
+	host->host = musb_init_controller(&platdata->plat,
+					  (struct device *)otg_board_data,
+					  platdata->base);
+	if (!host->host) {
+		return -EIO;
+	}
+
+	ret = musb_lowlevel_init(host);
+#else
+	ret = musb_register(&platdata->plat,
+			  (struct device *)otg_board_data,
+			  platdata->base);
+#endif
+	return ret;
+}
+
+static int omap2430_musb_remove(struct udevice *dev)
+{
+	struct musb_host_data *host = dev_get_priv(dev);
+
+	musb_stop(host->host);
+
+	return 0;
+}
+
+static const struct udevice_id omap2430_musb_ids[] = {
+	{ .compatible = "ti,omap3-musb" },
+	{ .compatible = "ti,omap4-musb" },
+	{ }
+};
+
+U_BOOT_DRIVER(omap2430_musb) = {
+	.name	= "omap2430-musb",
+#ifdef CONFIG_USB_MUSB_HOST
+	.id		= UCLASS_USB,
+#else
+	.id		= UCLASS_USB_DEV_GENERIC,
+#endif
+	.of_match = omap2430_musb_ids,
+	.ofdata_to_platdata = omap2430_musb_ofdata_to_platdata,
+	.probe = omap2430_musb_probe,
+	.remove = omap2430_musb_remove,
+#ifdef CONFIG_USB_MUSB_HOST
+	.ops = &musb_usb_ops,
+#endif
+	.platdata_auto_alloc_size = sizeof(struct omap2430_musb_platdata),
+	.priv_auto_alloc_size = sizeof(struct musb_host_data),
+};
+
+#endif /* CONFIG_DM_USB */