[POWERPC] 83xx: Add MPC837x USB platform support

Add chip specific and board specific initialization for MPC837x USB.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

3 files changed, 94 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/83xx/mpc837x_mds.c b/arch/powerpc/platforms/83xx/mpc837x_mds.c
index cfd05487f26e..8a9c26973605 100644
--- a/arch/powerpc/platforms/83xx/mpc837x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc837x_mds.c
@@ -22,6 +22,56 @@
 
 #include "mpc83xx.h"
 
+#define BCSR12_USB_SER_MASK     0x8a
+#define BCSR12_USB_SER_PIN      0x80
+#define BCSR12_USB_SER_DEVICE   0x02
+extern int mpc837x_usb_cfg(void);
+
+static int mpc837xmds_usb_cfg(void)
+{
+        struct device_node *np;
+        const void *phy_type, *mode;
+        void __iomem *bcsr_regs = NULL;
+        u8 bcsr12;
+        int ret;
+
+        ret = mpc837x_usb_cfg();
+        if (ret)
+                return ret;
+        /* Map BCSR area */
+        np = of_find_node_by_name(NULL, "bcsr");
+        if (np) {
+                struct resource res;
+
+                of_address_to_resource(np, 0, &res);
+                bcsr_regs = ioremap(res.start, res.end - res.start + 1);
+                of_node_put(np);
+        }
+        if (!bcsr_regs)
+                return -1;
+
+        np = of_find_node_by_name(NULL, "usb");
+        if (!np)
+                return -ENODEV;
+        phy_type = of_get_property(np, "phy_type", NULL);
+        if (phy_type && !strcmp(phy_type, "ulpi")) {
+                clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
+        } else if (phy_type && !strcmp(phy_type, "serial")) {
+                mode = of_get_property(np, "dr_mode", NULL);
+                bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
+                bcsr12 |= BCSR12_USB_SER_PIN;
+                if (mode && !strcmp(mode, "peripheral"))
+                        bcsr12 |= BCSR12_USB_SER_DEVICE;
+                out_8(bcsr_regs + 12, bcsr12);
+        } else {
+                printk(KERN_ERR "USB DR: unsupported PHY\n");
+        }
+
+        of_node_put(np);
+        iounmap(bcsr_regs);
+        return 0;
+}
+
 /* ************************************************************************
  *
  * Setup the architecture
@@ -40,6 +90,7 @@ static void __init mpc837x_mds_setup_arch(void)
         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
                 mpc83xx_add_bridge(np);
 #endif
+        mpc837xmds_usb_cfg();
 }
 
 static struct of_device_id mpc837x_ids[] = {
diff --git a/arch/powerpc/platforms/83xx/mpc83xx.h b/arch/powerpc/platforms/83xx/mpc83xx.h
index b778cb4f3fb5..88bb748aff0d 100644
--- a/arch/powerpc/platforms/83xx/mpc83xx.h
+++ b/arch/powerpc/platforms/83xx/mpc83xx.h
@@ -14,6 +14,7 @@
 #define MPC83XX_SCCR_USB_DRCM_11   0x00300000
 #define MPC83XX_SCCR_USB_DRCM_01   0x00100000
 #define MPC83XX_SCCR_USB_DRCM_10   0x00200000
+#define MPC837X_SCCR_USB_DRCM_11   0x00c00000
 
 /* system i/o configuration register low */
 #define MPC83XX_SICRL_OFFS         0x114
@@ -22,6 +23,8 @@
 #define MPC834X_SICRL_USB1         0x20000000
 #define MPC831X_SICRL_USB_MASK     0x00000c00
 #define MPC831X_SICRL_USB_ULPI     0x00000800
+#define MPC837X_SICRL_USB_MASK     0xf0000000
+#define MPC837X_SICRL_USB_ULPI     0x50000000
 
 /* system i/o configuration register high */
 #define MPC83XX_SICRH_OFFS         0x118
diff --git a/arch/powerpc/platforms/83xx/usb.c b/arch/powerpc/platforms/83xx/usb.c
index b45160f8d084..b1de453a8851 100644
--- a/arch/powerpc/platforms/83xx/usb.c
+++ b/arch/powerpc/platforms/83xx/usb.c
@@ -179,3 +179,43 @@ int mpc831x_usb_cfg(void)
         return ret;
 }
 #endif /* CONFIG_PPC_MPC831x */
+
+#ifdef CONFIG_PPC_MPC837x
+int mpc837x_usb_cfg(void)
+{
+        void __iomem *immap;
+        struct device_node *np = NULL;
+        const void *prop;
+        int ret = 0;
+
+        np = of_find_compatible_node(NULL, "usb", "fsl-usb2-dr");
+        if (!np)
+                return -ENODEV;
+        prop = of_get_property(np, "phy_type", NULL);
+
+        if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
+                printk(KERN_WARNING "837x USB PHY type not supported\n");
+                of_node_put(np);
+                return -EINVAL;
+        }
+
+        /* Map IMMR space for pin and clock settings */
+        immap = ioremap(get_immrbase(), 0x1000);
+        if (!immap) {
+                of_node_put(np);
+                return -ENOMEM;
+        }
+
+        /* Configure clock */
+        clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
+                        MPC837X_SCCR_USB_DRCM_11);
+
+        /* Configure pin mux for ULPI/serial */
+        clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
+                        MPC837X_SICRL_USB_ULPI);
+
+        iounmap(immap);
+        of_node_put(np);
+        return ret;
+}
+#endif /* CONFIG_PPC_MPC837x */