sh: Add OHCI USB support for SH7786

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 86 insertions, 1 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
index 249b99e1adb5..5a47e1cf442e 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
@@ -18,6 +18,7 @@
 #include <linux/serial_sci.h>
 #include <linux/io.h>
 #include <linux/mm.h>
+#include <linux/dma-mapping.h>
 #include <asm/mmzone.h>
 
 static struct plat_sci_port sci_platform_data[] = {
@@ -68,12 +69,94 @@ static struct platform_device sci_device = {
         },
 };
 
+static struct resource usb_ohci_resources[] = {
+        [0] = {
+                .start  = 0xffe70400,
+                .end    = 0xffe704ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = 77,
+                .end    = 77,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static u64 usb_ohci_dma_mask = DMA_BIT_MASK(32);
+static struct platform_device usb_ohci_device = {
+        .name           = "sh_ohci",
+        .id             = -1,
+        .dev = {
+                .dma_mask               = &usb_ohci_dma_mask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+        .num_resources  = ARRAY_SIZE(usb_ohci_resources),
+        .resource       = usb_ohci_resources,
+};
+
 static struct platform_device *sh7786_devices[] __initdata = {
         &sci_device,
+        &usb_ohci_device,
 };
 
+
+/*
+ * Please call this function if your platform board
+ * use external clock for USB
+ * */
+#define USBCTL0         0xffe70858
+#define CLOCK_MODE_MASK 0xffffff7f
+#define EXT_CLOCK_MODE  0x00000080
+void __init sh7786_usb_use_exclock(void)
+{
+        u32 val = __raw_readl(USBCTL0) & CLOCK_MODE_MASK;
+        __raw_writel(val | EXT_CLOCK_MODE, USBCTL0);
+}
+
+#define USBINITREG1     0xffe70094
+#define USBINITREG2     0xffe7009c
+#define USBINITVAL1     0x00ff0040
+#define USBINITVAL2     0x00000001
+
+#define USBPCTL1        0xffe70804
+#define USBST           0xffe70808
+#define PHY_ENB         0x00000001
+#define PLL_ENB         0x00000002
+#define PHY_RST         0x00000004
+#define ACT_PLL_STATUS  0xc0000000
+static void __init sh7786_usb_setup(void)
+{
+        int i = 1000000;
+
+        /*
+         * USB initial settings
+         *
+         * The following settings are necessary
+         * for using the USB modules.
+         *
+         * see "USB Inital Settings" for detail
+         */
+        __raw_writel(USBINITVAL1, USBINITREG1);
+        __raw_writel(USBINITVAL2, USBINITREG2);
+
+        /*
+         * Set the PHY and PLL enable bit
+         */
+        __raw_writel(PHY_ENB | PLL_ENB, USBPCTL1);
+        while (i-- &&
+               ((__raw_readl(USBST) & ACT_PLL_STATUS) != ACT_PLL_STATUS))
+                cpu_relax();
+
+        if (i) {
+                /* Set the PHY RST bit */
+                __raw_writel(PHY_ENB | PLL_ENB | PHY_RST, USBPCTL1);
+                printk(KERN_INFO "sh7786 usb setup done\n");
+        }
+}
+
 static int __init sh7786_devices_setup(void)
 {
+        sh7786_usb_setup();
         return platform_add_devices(sh7786_devices,
                                     ARRAY_SIZE(sh7786_devices));
 }
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 83babb0a1df7..c6c816b7ecb5 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -47,6 +47,7 @@ config USB_ARCH_HAS_OHCI
         default y if CPU_SUBTYPE_SH7720
         default y if CPU_SUBTYPE_SH7721
         default y if CPU_SUBTYPE_SH7763
+        default y if CPU_SUBTYPE_SH7786
         # more:
         default PCI
 
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 5cf5f1eca4f4..7658589edb1c 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1049,7 +1049,8 @@ MODULE_LICENSE ("GPL");
 
 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7763)
+    defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)
 #include "ohci-sh.c"
 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
 #endif