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 extern int mpc837x_usb_cfg(void);
  30
  31 static int mpc837xmds_usb_cfg(void)
  32 {
  33         struct device_node *np;
  34         const void *phy_type, *mode;
  35         void __iomem *bcsr_regs = NULL;
  36         u8 bcsr12;
  37         int ret;
  38
  39         ret = mpc837x_usb_cfg();
  40         if (ret)
  41                 return ret;
  42         /* Map BCSR area */
  43         np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
  44         if (np) {
  45                 bcsr_regs = of_iomap(np, 0);
  46                 of_node_put(np);
  47         }
  48         if (!bcsr_regs)
  49                 return -1;
  50
  51         np = of_find_node_by_name(NULL, "usb");
  52         if (!np)
  53                 return -ENODEV;
  54         phy_type = of_get_property(np, "phy_type", NULL);
  55         if (phy_type && !strcmp(phy_type, "ulpi")) {
  56                 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
  57         } else if (phy_type && !strcmp(phy_type, "serial")) {
  58                 mode = of_get_property(np, "dr_mode", NULL);
  59                 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
  60                 bcsr12 |= BCSR12_USB_SER_PIN;
  61                 if (mode && !strcmp(mode, "peripheral"))
  62                         bcsr12 |= BCSR12_USB_SER_DEVICE;
  63                 out_8(bcsr_regs + 12, bcsr12);
  64         } else {
  65                 printk(KERN_ERR "USB DR: unsupported PHY\n");
  66         }
  67
  68         of_node_put(np);
  69         iounmap(bcsr_regs);
  70         return 0;
  71 }
  72
  73 /* ************************************************************************
  74  *
  75  * Setup the architecture
  76  *
  77  */
  78 static void __init mpc837x_mds_setup_arch(void)
  79 {
  80 #ifdef CONFIG_PCI
  81         struct device_node *np;
  82 #endif
  83
  84         if (ppc_md.progress)
  85                 ppc_md.progress("mpc837x_mds_setup_arch()", 0);
  86
  87 #ifdef CONFIG_PCI
  88         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") {
  89                 if (!of_device_is_available(np)) {
  90                         pr_warning("%s: disabled by the firmware.\n",
  91                                    np->full_name);
  92                         continue;
  93                 }
  94                 mpc83xx_add_bridge(np);
  95         }
  96 #endif
  97         mpc837xmds_usb_cfg();
  98 }
  99
 100 static struct of_device_id mpc837x_ids[] = {
 101         { .type = "soc", },
 102         { .compatible = "soc", },
 103         { .compatible = "simple-bus", },
 104         {},
 105 };
 106
 107 static int __init mpc837x_declare_of_platform_devices(void)
 108 {
 109         /* Publish of_device */
 110         of_platform_bus_probe(NULL, mpc837x_ids, NULL);
 111
 112         return 0;
 113 }
 114 machine_device_initcall(mpc837x_mds, mpc837x_declare_of_platform_devices);
 115
 116 static void __init mpc837x_mds_init_IRQ(void)
 117 {
 118         struct device_node *np;
 119
 120         np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
 121         if (!np)
 122                 return;
 123
 124         ipic_init(np, 0);
 125
 126         /* Initialize the default interrupt mapping priorities,
 127          * in case the boot rom changed something on us.
 128          */
 129         ipic_set_default_priority();
 130 }
 131
 132 /*
 133  * Called very early, MMU is off, device-tree isn't unflattened
 134  */
 135 static int __init mpc837x_mds_probe(void)
 136 {
 137         unsigned long root = of_get_flat_dt_root();
 138
 139         return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
 140 }
 141
 142 define_machine(mpc837x_mds) {
 143         .name                   = "MPC837x MDS",
 144         .probe                  = mpc837x_mds_probe,
 145         .setup_arch             = mpc837x_mds_setup_arch,
 146         .init_IRQ               = mpc837x_mds_init_IRQ,
 147         .get_irq                = ipic_get_irq,
 148         .restart                = mpc83xx_restart,
 149         .time_init              = mpc83xx_time_init,
 150         .calibrate_decr         = generic_calibrate_decr,
 151         .progress               = udbg_progress,
 152 };