usb: musb: split blackfin to its own platform_driver

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

Later 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>

2 files changed, 85 insertions, 3 deletions

diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index d2a012917887..61f46affcf7a 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -13,14 +13,12 @@ musb_hdrc-$(CONFIG_USB_MUSB_HDRC_HCD)		+= musb_virthub.o musb_host.o
 musb_hdrc-$(CONFIG_DEBUG_FS)                    += musb_debugfs.o
 
 # Hardware Glue Layer
-
-musb_hdrc-$(CONFIG_USB_MUSB_BLACKFIN)           += blackfin.o
-
 obj-$(CONFIG_USB_MUSB_OMAP2PLUS)                += omap2430.o
 obj-$(CONFIG_USB_MUSB_AM35X)                    += am35x.o
 obj-$(CONFIG_USB_MUSB_TUSB6010)                 += tusb6010.o
 obj-$(CONFIG_USB_MUSB_DAVINCI)                  += davinci.o
 obj-$(CONFIG_USB_MUSB_DA8XX)                    += da8xx.o
+obj-$(CONFIG_USB_MUSB_BLACKFIN)                 += blackfin.o
 
 # the kconfig must guarantee that only one of the
 # possible I/O schemes will be enabled at a time ...
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 9874501d6429..b0968201d849 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -15,6 +15,8 @@
 #include <linux/list.h>
 #include <linux/gpio.h>
 #include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/cacheflush.h>
 
@@ -442,3 +444,85 @@ const struct musb_platform_ops musb_ops = {
         .vbus_status    = bfin_musb_vbus_status,
         .set_vbus       = bfin_musb_set_vbus,
 };
+
+static u64 bfin_dmamask = DMA_BIT_MASK(32);
+
+static int __init bfin_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              = &bfin_dmamask;
+        musb->dev.coherent_dma_mask     = bfin_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 bfin_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 bfin_driver = {
+        .remove         = __exit_p(bfin_remove),
+        .driver         = {
+                .name   = "musb-bfin",
+        },
+};
+
+MODULE_DESCRIPTION("Blackfin MUSB Glue Layer");
+MODULE_AUTHOR("Bryan Wy <cooloney@kernel.org>");
+MODULE_LICENSE("GPL v2");
+
+static int __init bfin_init(void)
+{
+        return platform_driver_probe(&bfin_driver, bfin_probe);
+}
+subsys_initcall(bfin_init);
+
+static void __exit bfin_exit(void)
+{
+        platform_driver_unregister(&bfin_driver);
+}
+module_exit(bfin_exit);