kernel/arch/powerpc/platforms/8xx/adder875.c

   1 /* Analogue & Micro Adder MPC875 board support
   2  *
   3  * Author: Scott Wood <scottwood@freescale.com>
   4  *
   5  * Copyright (c) 2007 Freescale Semiconductor, Inc.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify
   8  * it under the terms of the GNU General Public License, version 2, as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/fs_enet_pd.h>
  14 #include <linux/of_platform.h>
  15
  16 #include <asm/time.h>
  17 #include <asm/machdep.h>
  18 #include <asm/cpm1.h>
  19 #include <asm/fs_pd.h>
  20 #include <asm/udbg.h>
  21 #include <asm/prom.h>
  22
  23 #include "mpc8xx.h"
  24
  25 struct cpm_pin {
  26         int port, pin, flags;
  27 };
  28
  29 static __initdata struct cpm_pin adder875_pins[] = {
  30         /* SMC1 */
  31         {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
  32         {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  33
  34         /* MII1 */
  35         {CPM_PORTA, 0, CPM_PIN_INPUT},
  36         {CPM_PORTA, 1, CPM_PIN_INPUT},
  37         {CPM_PORTA, 2, CPM_PIN_INPUT},
  38         {CPM_PORTA, 3, CPM_PIN_INPUT},
  39         {CPM_PORTA, 4, CPM_PIN_OUTPUT},
  40         {CPM_PORTA, 10, CPM_PIN_OUTPUT},
  41         {CPM_PORTA, 11, CPM_PIN_OUTPUT},
  42         {CPM_PORTB, 19, CPM_PIN_INPUT},
  43         {CPM_PORTB, 31, CPM_PIN_INPUT},
  44         {CPM_PORTC, 12, CPM_PIN_INPUT},
  45         {CPM_PORTC, 13, CPM_PIN_INPUT},
  46         {CPM_PORTE, 30, CPM_PIN_OUTPUT},
  47         {CPM_PORTE, 31, CPM_PIN_OUTPUT},
  48
  49         /* MII2 */
  50         {CPM_PORTE, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  51         {CPM_PORTE, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  52         {CPM_PORTE, 16, CPM_PIN_OUTPUT},
  53         {CPM_PORTE, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  54         {CPM_PORTE, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  55         {CPM_PORTE, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  56         {CPM_PORTE, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  57         {CPM_PORTE, 21, CPM_PIN_OUTPUT},
  58         {CPM_PORTE, 22, CPM_PIN_OUTPUT},
  59         {CPM_PORTE, 23, CPM_PIN_OUTPUT},
  60         {CPM_PORTE, 24, CPM_PIN_OUTPUT},
  61         {CPM_PORTE, 25, CPM_PIN_OUTPUT},
  62         {CPM_PORTE, 26, CPM_PIN_OUTPUT},
  63         {CPM_PORTE, 27, CPM_PIN_OUTPUT},
  64         {CPM_PORTE, 28, CPM_PIN_OUTPUT},
  65         {CPM_PORTE, 29, CPM_PIN_OUTPUT},
  66 };
  67
  68 static void __init init_ioports(void)
  69 {
  70         int i;
  71
  72         for (i = 0; i < ARRAY_SIZE(adder875_pins); i++) {
  73                 const struct cpm_pin *pin = &adder875_pins[i];
  74                 cpm1_set_pin(pin->port, pin->pin, pin->flags);
  75         }
  76
  77         cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
  78
  79         /* Set FEC1 and FEC2 to MII mode */
  80         clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
  81 }
  82
  83 static void __init adder875_setup(void)
  84 {
  85         cpm_reset();
  86         init_ioports();
  87 }
  88
  89 static int __init adder875_probe(void)
  90 {
  91         unsigned long root = of_get_flat_dt_root();
  92         return of_flat_dt_is_compatible(root, "analogue-and-micro,adder875");
  93 }
  94
  95 static const struct of_device_id of_bus_ids[] __initconst = {
  96         { .compatible = "simple-bus", },
  97         {},
  98 };
  99
 100 static int __init declare_of_platform_devices(void)
 101 {
 102         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 103         return 0;
 104 }
 105 machine_device_initcall(adder875, declare_of_platform_devices);
 106
 107 define_machine(adder875) {
 108         .name = "Adder MPC875",
 109         .probe = adder875_probe,
 110         .setup_arch = adder875_setup,
 111         .init_IRQ = mpc8xx_pics_init,
 112         .get_irq = mpc8xx_get_irq,
 113         .restart = mpc8xx_restart,
 114         .calibrate_decr = generic_calibrate_decr,
 115         .set_rtc_time = mpc8xx_set_rtc_time,
 116         .get_rtc_time = mpc8xx_get_rtc_time,
 117         .progress = udbg_progress,
 118 };