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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/powerpc/platforms/83xx/mpc837x_mds.c
   4  *
   5  * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
   6  *
   7  * MPC837x MDS board specific routines
   8  */
   9
  10 #include <linux/pci.h>
  11 #include <linux/of.h>
  12 #include <linux/of_platform.h>
  13
  14 #include <asm/time.h>
  15 #include <asm/ipic.h>
  16 #include <asm/udbg.h>
  17 #include <asm/prom.h>
  18 #include <sysdev/fsl_pci.h>
  19
  20 #include "mpc83xx.h"
  21
  22 #define BCSR12_USB_SER_MASK     0x8a
  23 #define BCSR12_USB_SER_PIN      0x80
  24 #define BCSR12_USB_SER_DEVICE   0x02
  25
  26 static int mpc837xmds_usb_cfg(void)
  27 {
  28         struct device_node *np;
  29         const void *phy_type, *mode;
  30         void __iomem *bcsr_regs = NULL;
  31         u8 bcsr12;
  32         int ret;
  33
  34         ret = mpc837x_usb_cfg();
  35         if (ret)
  36                 return ret;
  37         /* Map BCSR area */
  38         np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
  39         if (np) {
  40                 bcsr_regs = of_iomap(np, 0);
  41                 of_node_put(np);
  42         }
  43         if (!bcsr_regs)
  44                 return -1;
  45
  46         np = of_find_node_by_name(NULL, "usb");
  47         if (!np) {
  48                 ret = -ENODEV;
  49                 goto out;
  50         }
  51         phy_type = of_get_property(np, "phy_type", NULL);
  52         if (phy_type && !strcmp(phy_type, "ulpi")) {
  53                 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
  54         } else if (phy_type && !strcmp(phy_type, "serial")) {
  55                 mode = of_get_property(np, "dr_mode", NULL);
  56                 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
  57                 bcsr12 |= BCSR12_USB_SER_PIN;
  58                 if (mode && !strcmp(mode, "peripheral"))
  59                         bcsr12 |= BCSR12_USB_SER_DEVICE;
  60                 out_8(bcsr_regs + 12, bcsr12);
  61         } else {
  62                 printk(KERN_ERR "USB DR: unsupported PHY\n");
  63         }
  64
  65         of_node_put(np);
  66 out:
  67         iounmap(bcsr_regs);
  68         return ret;
  69 }
  70
  71 /* ************************************************************************
  72  *
  73  * Setup the architecture
  74  *
  75  */
  76 static void __init mpc837x_mds_setup_arch(void)
  77 {
  78         mpc83xx_setup_arch();
  79         mpc837xmds_usb_cfg();
  80 }
  81
  82 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
  83
  84 /*
  85  * Called very early, MMU is off, device-tree isn't unflattened
  86  */
  87 static int __init mpc837x_mds_probe(void)
  88 {
  89         return of_machine_is_compatible("fsl,mpc837xmds");
  90 }
  91
  92 define_machine(mpc837x_mds) {
  93         .name                   = "MPC837x MDS",
  94         .probe                  = mpc837x_mds_probe,
  95         .setup_arch             = mpc837x_mds_setup_arch,
  96         .init_IRQ               = mpc83xx_ipic_init_IRQ,
  97         .get_irq                = ipic_get_irq,
  98         .restart                = mpc83xx_restart,
  99         .time_init              = mpc83xx_time_init,
 100         .calibrate_decr         = generic_calibrate_decr,
 101         .progress               = udbg_progress,
 102 };