arch/powerpc/platforms/8xx/mgsuvd.c

   1 /*
   2  *
   3  * Platform setup for the Keymile mgsuvd board
   4  *
   5  * Heiko Schocher <hs@denx.de>
   6  *
   7  * Copyright 2008 DENX Software Engineering GmbH
   8  *
   9  * This file is licensed under the terms of the GNU General Public License
  10  * version 2. This program is licensed "as is" without any warranty of any
  11  * kind, whether express or implied.
  12  */
  13
  14 #include <linux/ioport.h>
  15 #include <linux/of_platform.h>
  16
  17 #include <asm/io.h>
  18 #include <asm/machdep.h>
  19 #include <asm/processor.h>
  20 #include <asm/cpm1.h>
  21 #include <asm/prom.h>
  22 #include <asm/fs_pd.h>
  23
  24 #include "mpc8xx.h"
  25
  26 struct cpm_pin {
  27         int port, pin, flags;
  28 };
  29
  30 static __initdata struct cpm_pin mgsuvd_pins[] = {
  31         /* SMC1 */
  32         {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
  33         {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  34
  35         /* SCC3 */
  36         {CPM_PORTA, 10, CPM_PIN_INPUT},
  37         {CPM_PORTA, 11, CPM_PIN_INPUT},
  38         {CPM_PORTA, 3, CPM_PIN_INPUT},
  39         {CPM_PORTA, 2, CPM_PIN_INPUT},
  40         {CPM_PORTC, 13, CPM_PIN_INPUT},
  41 };
  42
  43 static void __init init_ioports(void)
  44 {
  45         int i;
  46
  47         for (i = 0; i < ARRAY_SIZE(mgsuvd_pins); i++) {
  48                 struct cpm_pin *pin = &mgsuvd_pins[i];
  49                 cpm1_set_pin(pin->port, pin->pin, pin->flags);
  50         }
  51
  52         setbits16(&mpc8xx_immr->im_ioport.iop_pcso, 0x300);
  53         cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RX);
  54         cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK6, CPM_CLK_TX);
  55         cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
  56 }
  57
  58 static void __init mgsuvd_setup_arch(void)
  59 {
  60         cpm_reset();
  61         init_ioports();
  62 }
  63
  64 static __initdata struct of_device_id of_bus_ids[] = {
  65         { .compatible = "simple-bus" },
  66         {},
  67 };
  68
  69 static int __init declare_of_platform_devices(void)
  70 {
  71         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  72         return 0;
  73 }
  74 machine_device_initcall(mgsuvd, declare_of_platform_devices);
  75
  76 static int __init mgsuvd_probe(void)
  77 {
  78         unsigned long root = of_get_flat_dt_root();
  79         return of_flat_dt_is_compatible(root, "keymile,mgsuvd");
  80 }
  81
  82 define_machine(mgsuvd) {
  83         .name           = "MGSUVD",
  84         .probe          = mgsuvd_probe,
  85         .setup_arch     = mgsuvd_setup_arch,
  86         .init_IRQ       = mpc8xx_pics_init,
  87         .get_irq        = mpc8xx_get_irq,
  88         .restart        = mpc8xx_restart,
  89         .calibrate_decr = mpc8xx_calibrate_decr,
  90         .set_rtc_time   = mpc8xx_set_rtc_time,
  91         .get_rtc_time   = mpc8xx_get_rtc_time,
  92 };