usb: musb: split am35x to its own platform_driver

Just adding its own platform_driver, not really
using it yet.

When all HW glue layers are converted, more patches
will come to split power management code from musb_core
and move it completely to HW glue layer.

Signed-off-by: Felipe Balbi <balbi@ti.com>

arch/arm/mach-omap2/usb-musb.c

@@ -93,6 +93,7 @@ void __init usb_musb_init(struct omap_musb_board_data *board_data)
 	if (cpu_is_omap243x()) {
 		musb_resources[0].start = OMAP243X_HS_BASE;
 	} else if (cpu_is_omap3517() || cpu_is_omap3505()) {
+		musb_device.name = "musb-am35x";
 		musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE;
 		musb_resources[1].start = INT_35XX_USBOTG_IRQ;
 	} else if (cpu_is_omap34xx()) {

drivers/usb/musb/Makefile

@@ -17,10 +17,10 @@ musb_hdrc-$(CONFIG_DEBUG_FS)			+= musb_debugfs.o
 musb_hdrc-$(CONFIG_USB_MUSB_DAVINCI)		+= davinci.o
 musb_hdrc-$(CONFIG_USB_MUSB_DA8XX)		+= da8xx.o
 musb_hdrc-$(CONFIG_USB_MUSB_TUSB6010)		+= tusb6010.o
-musb_hdrc-$(CONFIG_USB_MUSB_AM35X)		+= am35x.o
 musb_hdrc-$(CONFIG_USB_MUSB_BLACKFIN)		+= blackfin.o
 
 obj-$(CONFIG_USB_MUSB_OMAP2PLUS)		+= omap2430.o
+obj-$(CONFIG_USB_MUSB_AM35X)			+= am35x.o
 
 # the kconfig must guarantee that only one of the
 # possible I/O schemes will be enabled at a time ...

drivers/usb/musb/am35x.c

@@ -29,6 +29,8 @@
 #include <linux/init.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
 
 #include <plat/control.h>
 #include <plat/usb.h>
@@ -535,3 +537,85 @@ const struct musb_platform_ops musb_ops = {
 
 	.set_vbus	= am35x_musb_set_vbus,
 };
+
+static u64 am35x_dmamask = DMA_BIT_MASK(32);
+
+static int __init am35x_probe(struct platform_device *pdev)
+{
+	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
+	struct platform_device		*musb;
+
+	int				ret = -ENOMEM;
+
+	musb = platform_device_alloc("musb-hdrc", -1);
+	if (!musb) {
+		dev_err(&pdev->dev, "failed to allocate musb device\n");
+		goto err0;
+	}
+
+	musb->dev.parent		= &pdev->dev;
+	musb->dev.dma_mask		= &am35x_dmamask;
+	musb->dev.coherent_dma_mask	= am35x_dmamask;
+
+	platform_set_drvdata(pdev, musb);
+
+	ret = platform_device_add_resources(musb, pdev->resource,
+			pdev->num_resources);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add resources\n");
+		goto err1;
+	}
+
+	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add platform_data\n");
+		goto err1;
+	}
+
+	ret = platform_device_add(musb);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register musb device\n");
+		goto err1;
+	}
+
+	return 0;
+
+err1:
+	platform_device_put(musb);
+
+err0:
+	return ret;
+}
+
+static int __exit am35x_remove(struct platform_device *pdev)
+{
+	struct platform_device		*musb = platform_get_drvdata(pdev);
+
+	platform_device_del(musb);
+	platform_device_put(musb);
+
+	return 0;
+}
+
+static struct platform_driver am35x_driver = {
+	.remove		= __exit_p(am35x_remove),
+	.driver		= {
+		.name	= "musb-am35x",
+	},
+};
+
+MODULE_DESCRIPTION("AM35x MUSB Glue Layer");
+MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
+MODULE_LICENSE("GPL v2");
+
+static int __init am35x_init(void)
+{
+	return platform_driver_probe(&am35x_driver, am35x_probe);
+}
+subsys_initcall(am35x_init);
+
+static void __exit am35x_exit(void)
+{
+	platform_driver_unregister(&am35x_driver);
+}
+module_exit(am35x_exit);