[POWERPC] 83xx: Add USB setup code for MPC8349E MDS-PB

Add board specific initialization code for USB to work in both MPH and DR
mode for MPC8349E MDS-PB board.

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

2 files changed, 91 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/83xx/mpc834x_sys.c b/arch/powerpc/platforms/83xx/mpc834x_sys.c
index f30393f0b832..873ec543c361 100644
--- a/arch/powerpc/platforms/83xx/mpc834x_sys.c
+++ b/arch/powerpc/platforms/83xx/mpc834x_sys.c
@@ -43,6 +43,76 @@ unsigned long isa_io_base = 0;
 unsigned long isa_mem_base = 0;
 #endif
 
+#define BCSR5_INT_USB           0x02
+/* Note: This is only for PB, not for PB+PIB
+ * On PB only port0 is connected using ULPI */
+static int mpc834x_usb_cfg(void)
+{
+        unsigned long sccr, sicrl;
+        void __iomem *immap;
+        void __iomem *bcsr_regs = NULL;
+        u8 bcsr5;
+        struct device_node *np = NULL;
+        int port0_is_dr = 0;
+
+        if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-dr")) != NULL)
+                port0_is_dr = 1;
+        if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-mph")) != NULL){
+                if (port0_is_dr) {
+                        printk(KERN_WARNING
+                                "There is only one USB port on PB board! \n");
+                        return -1;
+                } else if (!port0_is_dr)
+                        /* No usb port enabled */
+                        return -1;
+        }
+
+        immap = ioremap(get_immrbase(), 0x1000);
+        if (!immap)
+                return -1;
+
+        /* Configure clock */
+        sccr = in_be32(immap + MPC83XX_SCCR_OFFS);
+        if (port0_is_dr)
+                sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */
+        else
+                sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
+        out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
+
+        /* Configure Pin */
+        sicrl = in_be32(immap + MPC83XX_SICRL_OFFS);
+        /* set port0 only */
+        if (port0_is_dr)
+                sicrl |= MPC83XX_SICRL_USB0;
+        else
+                sicrl &= ~(MPC83XX_SICRL_USB0);
+        out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
+
+        iounmap(immap);
+
+        /* Map BCSR area */
+        np = of_find_node_by_name(NULL, "bcsr");
+        if (np != 0) {
+                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;
+
+        /*
+         * if SYS board is plug into PIB board,
+         * force to use the PHY on SYS board
+         */
+        bcsr5 = in_8(bcsr_regs + 5);
+        if (!(bcsr5 & BCSR5_INT_USB))
+                out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
+        iounmap(bcsr_regs);
+        return 0;
+}
+
 /* ************************************************************************
  *
  * Setup the architecture
@@ -65,6 +135,7 @@ static void __init mpc834x_sys_setup_arch(void)
                         loops_per_jiffy = 50000000 / HZ;
                 of_node_put(np);
         }
+
 #ifdef CONFIG_PCI
         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
                 add_bridge(np);
@@ -72,6 +143,8 @@ static void __init mpc834x_sys_setup_arch(void)
         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
 
+        mpc834x_usb_cfg();
+
 #ifdef  CONFIG_ROOT_NFS
         ROOT_DEV = Root_NFS;
 #else
diff --git a/arch/powerpc/platforms/83xx/mpc83xx.h b/arch/powerpc/platforms/83xx/mpc83xx.h
index 01cae106912b..9cd03b59c8f4 100644
--- a/arch/powerpc/platforms/83xx/mpc83xx.h
+++ b/arch/powerpc/platforms/83xx/mpc83xx.h
@@ -4,6 +4,24 @@
 #include <linux/init.h>
 #include <linux/device.h>
 
+/* System Clock Control Register */
+#define MPC83XX_SCCR_OFFS          0xA08
+#define MPC83XX_SCCR_USB_MPHCM_11  0x00c00000
+#define MPC83XX_SCCR_USB_MPHCM_01  0x00400000
+#define MPC83XX_SCCR_USB_MPHCM_10  0x00800000
+#define MPC83XX_SCCR_USB_DRCM_11   0x00300000
+#define MPC83XX_SCCR_USB_DRCM_01   0x00100000
+#define MPC83XX_SCCR_USB_DRCM_10   0x00200000
+
+/* system i/o configuration register low */
+#define MPC83XX_SICRL_OFFS         0x114
+#define MPC83XX_SICRL_USB0         0x40000000
+#define MPC83XX_SICRL_USB1         0x20000000
+
+/* system i/o configuration register high */
+#define MPC83XX_SICRH_OFFS         0x118
+#define MPC83XX_SICRH_USB_UTMI     0x00020000
+
 /*
  * Declaration for the various functions exported by the
  * mpc83xx_* files. Mostly for use by mpc83xx_setup