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