arch/powerpc/platforms/83xx/mpc837x_mds.c

   1 /*
   2  * arch/powerpc/platforms/83xx/mpc837x_mds.c
   3  *
   4  * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
   5  *
   6  * MPC837x MDS board specific routines
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation;  either version 2 of the License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/pci.h>
  15 #include <linux/of.h>
  16 #include <linux/of_platform.h>
  17
  18 #include <asm/time.h>
  19 #include <asm/ipic.h>
  20 #include <asm/udbg.h>
  21 #include <asm/prom.h>
  22 #include <sysdev/fsl_pci.h>
  23
  24 #include "mpc83xx.h"
  25
  26 #define BCSR12_USB_SER_MASK     0x8a
  27 #define BCSR12_USB_SER_PIN      0x80
  28 #define BCSR12_USB_SER_DEVICE   0x02
  29
  30 static int mpc837xmds_usb_cfg(void)
  31 {
  32         struct device_node *np;
  33         const void *phy_type, *mode;
  34         void __iomem *bcsr_regs = NULL;
  35         u8 bcsr12;
  36         int ret;
  37
  38         ret = mpc837x_usb_cfg();
  39         if (ret)
  40                 return ret;
  41         /* Map BCSR area */
  42         np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
  43         if (np) {
  44                 bcsr_regs = of_iomap(np, 0);
  45                 of_node_put(np);
  46         }
  47         if (!bcsr_regs)
  48                 return -1;
  49
  50         np = of_find_node_by_name(NULL, "usb");
  51         if (!np) {
  52                 ret = -ENODEV;
  53                 goto out;
  54         }
  55         phy_type = of_get_property(np, "phy_type", NULL);
  56         if (phy_type && !strcmp(phy_type, "ulpi")) {
  57                 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
  58         } else if (phy_type && !strcmp(phy_type, "serial")) {
  59                 mode = of_get_property(np, "dr_mode", NULL);
  60                 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
  61                 bcsr12 |= BCSR12_USB_SER_PIN;
  62                 if (mode && !strcmp(mode, "peripheral"))
  63                         bcsr12 |= BCSR12_USB_SER_DEVICE;
  64                 out_8(bcsr_regs + 12, bcsr12);
  65         } else {
  66                 printk(KERN_ERR "USB DR: unsupported PHY\n");
  67         }
  68
  69         of_node_put(np);
  70 out:
  71         iounmap(bcsr_regs);
  72         return ret;
  73 }
  74
  75 /* ************************************************************************
  76  *
  77  * Setup the architecture
  78  *
  79  */
  80 static void __init mpc837x_mds_setup_arch(void)
  81 {
  82         if (ppc_md.progress)
  83                 ppc_md.progress("mpc837x_mds_setup_arch()", 0);
  84
  85         mpc83xx_setup_pci();
  86         mpc837xmds_usb_cfg();
  87 }
  88
  89 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
  90
  91 /*
  92  * Called very early, MMU is off, device-tree isn't unflattened
  93  */
  94 static int __init mpc837x_mds_probe(void)
  95 {
  96         unsigned long root = of_get_flat_dt_root();
  97
  98         return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
  99 }
 100
 101 define_machine(mpc837x_mds) {
 102         .name                   = "MPC837x MDS",
 103         .probe                  = mpc837x_mds_probe,
 104         .setup_arch             = mpc837x_mds_setup_arch,
 105         .init_IRQ               = mpc83xx_ipic_init_IRQ,
 106         .get_irq                = ipic_get_irq,
 107         .restart                = mpc83xx_restart,
 108         .time_init              = mpc83xx_time_init,
 109         .calibrate_decr         = generic_calibrate_decr,
 110         .progress               = udbg_progress,
 111 };