LXR linux/arch/powerpc/platforms/83xx/mpc837x

   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
  30static 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);
  70out:
  71        iounmap(bcsr_regs);
  72        return ret;
  73}
  74
  75/* ************************************************************************
  76 *
  77 * Setup the architecture
  78 *
  79 */
  80static 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
  89machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
  90
  91/*
  92 * Called very early, MMU is off, device-tree isn't unflattened
  93 */
  94static 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
 101define_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};
 112