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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
  23 #include "mpc83xx.h"
  24
  25 #define BCSR12_USB_SER_MASK     0x8a
  26 #define BCSR12_USB_SER_PIN      0x80
  27 #define BCSR12_USB_SER_DEVICE   0x02
  28 extern int mpc837x_usb_cfg(void);
  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_node_by_name(NULL, "bcsr");
  43         if (np) {
  44                 struct resource res;
  45
  46                 of_address_to_resource(np, 0, &res);
  47                 bcsr_regs = ioremap(res.start, res.end - res.start + 1);
  48                 of_node_put(np);
  49         }
  50         if (!bcsr_regs)
  51                 return -1;
  52
  53         np = of_find_node_by_name(NULL, "usb");
  54         if (!np)
  55                 return -ENODEV;
  56         phy_type = of_get_property(np, "phy_type", NULL);
  57         if (phy_type && !strcmp(phy_type, "ulpi")) {
  58                 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
  59         } else if (phy_type && !strcmp(phy_type, "serial")) {
  60                 mode = of_get_property(np, "dr_mode", NULL);
  61                 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
  62                 bcsr12 |= BCSR12_USB_SER_PIN;
  63                 if (mode && !strcmp(mode, "peripheral"))
  64                         bcsr12 |= BCSR12_USB_SER_DEVICE;
  65                 out_8(bcsr_regs + 12, bcsr12);
  66         } else {
  67                 printk(KERN_ERR "USB DR: unsupported PHY\n");
  68         }
  69
  70         of_node_put(np);
  71         iounmap(bcsr_regs);
  72         return 0;
  73 }
  74
  75 /* ************************************************************************
  76  *
  77  * Setup the architecture
  78  *
  79  */
  80 static void __init mpc837x_mds_setup_arch(void)
  81 {
  82 #ifdef CONFIG_PCI
  83         struct device_node *np;
  84 #endif
  85
  86         if (ppc_md.progress)
  87                 ppc_md.progress("mpc837x_mds_setup_arch()", 0);
  88
  89 #ifdef CONFIG_PCI
  90         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  91                 mpc83xx_add_bridge(np);
  92 #endif
  93         mpc837xmds_usb_cfg();
  94 }
  95
  96 static struct of_device_id mpc837x_ids[] = {
  97         { .type = "soc", },
  98         { .compatible = "soc", },
  99         {},
 100 };
 101
 102 static int __init mpc837x_declare_of_platform_devices(void)
 103 {
 104         /* Publish of_device */
 105         of_platform_bus_probe(NULL, mpc837x_ids, NULL);
 106
 107         return 0;
 108 }
 109 machine_device_initcall(mpc837x_mds, mpc837x_declare_of_platform_devices);
 110
 111 static void __init mpc837x_mds_init_IRQ(void)
 112 {
 113         struct device_node *np;
 114
 115         np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
 116         if (!np)
 117                 return;
 118
 119         ipic_init(np, 0);
 120
 121         /* Initialize the default interrupt mapping priorities,
 122          * in case the boot rom changed something on us.
 123          */
 124         ipic_set_default_priority();
 125 }
 126
 127 /*
 128  * Called very early, MMU is off, device-tree isn't unflattened
 129  */
 130 static int __init mpc837x_mds_probe(void)
 131 {
 132         unsigned long root = of_get_flat_dt_root();
 133
 134         return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
 135 }
 136
 137 define_machine(mpc837x_mds) {
 138         .name                   = "MPC837x MDS",
 139         .probe                  = mpc837x_mds_probe,
 140         .setup_arch             = mpc837x_mds_setup_arch,
 141         .init_IRQ               = mpc837x_mds_init_IRQ,
 142         .get_irq                = ipic_get_irq,
 143         .restart                = mpc83xx_restart,
 144         .time_init              = mpc83xx_time_init,
 145         .calibrate_decr         = generic_calibrate_decr,
 146         .progress               = udbg_progress,
 147 };