arch/arm/mach-omap1/devices.c

   1 /*
   2  * linux/arch/arm/mach-omap1/devices.c
   3  *
   4  * OMAP1 platform device setup/initialization
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/platform_device.h>
  16
  17 #include <mach/hardware.h>
  18 #include <asm/io.h>
  19 #include <asm/mach/map.h>
  20
  21 #include <mach/tc.h>
  22 #include <mach/board.h>
  23 #include <mach/mux.h>
  24 #include <mach/gpio.h>
  25
  26 /*-------------------------------------------------------------------------*/
  27
  28 #if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)
  29
  30 #define OMAP_RTC_BASE           0xfffb4800
  31
  32 static struct resource rtc_resources[] = {
  33         {
  34                 .start          = OMAP_RTC_BASE,
  35                 .end            = OMAP_RTC_BASE + 0x5f,
  36                 .flags          = IORESOURCE_MEM,
  37         },
  38         {
  39                 .start          = INT_RTC_TIMER,
  40                 .flags          = IORESOURCE_IRQ,
  41         },
  42         {
  43                 .start          = INT_RTC_ALARM,
  44                 .flags          = IORESOURCE_IRQ,
  45         },
  46 };
  47
  48 static struct platform_device omap_rtc_device = {
  49         .name           = "omap_rtc",
  50         .id             = -1,
  51         .num_resources  = ARRAY_SIZE(rtc_resources),
  52         .resource       = rtc_resources,
  53 };
  54
  55 static void omap_init_rtc(void)
  56 {
  57         (void) platform_device_register(&omap_rtc_device);
  58 }
  59 #else
  60 static inline void omap_init_rtc(void) {}
  61 #endif
  62
  63 #if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)
  64
  65 #if defined(CONFIG_ARCH_OMAP15XX)
  66 #  define OMAP1_MBOX_SIZE       0x23
  67 #  define INT_DSP_MAILBOX1      INT_1510_DSP_MAILBOX1
  68 #elif defined(CONFIG_ARCH_OMAP16XX)
  69 #  define OMAP1_MBOX_SIZE       0x2f
  70 #  define INT_DSP_MAILBOX1      INT_1610_DSP_MAILBOX1
  71 #endif
  72
  73 #define OMAP1_MBOX_BASE         IO_ADDRESS(OMAP16XX_MAILBOX_BASE)
  74
  75 static struct resource mbox_resources[] = {
  76         {
  77                 .start          = OMAP1_MBOX_BASE,
  78                 .end            = OMAP1_MBOX_BASE + OMAP1_MBOX_SIZE,
  79                 .flags          = IORESOURCE_MEM,
  80         },
  81         {
  82                 .start          = INT_DSP_MAILBOX1,
  83                 .flags          = IORESOURCE_IRQ,
  84         },
  85 };
  86
  87 static struct platform_device mbox_device = {
  88         .name           = "mailbox",
  89         .id             = -1,
  90         .num_resources  = ARRAY_SIZE(mbox_resources),
  91         .resource       = mbox_resources,
  92 };
  93
  94 static inline void omap_init_mbox(void)
  95 {
  96         platform_device_register(&mbox_device);
  97 }
  98 #else
  99 static inline void omap_init_mbox(void) { }
 100 #endif
 101
 102 #if defined(CONFIG_OMAP_STI)
 103
 104 #define OMAP1_STI_BASE          IO_ADDRESS(0xfffea000)
 105 #define OMAP1_STI_CHANNEL_BASE  (OMAP1_STI_BASE + 0x400)
 106
 107 static struct resource sti_resources[] = {
 108         {
 109                 .start          = OMAP1_STI_BASE,
 110                 .end            = OMAP1_STI_BASE + SZ_1K - 1,
 111                 .flags          = IORESOURCE_MEM,
 112         },
 113         {
 114                 .start          = OMAP1_STI_CHANNEL_BASE,
 115                 .end            = OMAP1_STI_CHANNEL_BASE + SZ_1K - 1,
 116                 .flags          = IORESOURCE_MEM,
 117         },
 118         {
 119                 .start          = INT_1610_STI,
 120                 .flags          = IORESOURCE_IRQ,
 121         }
 122 };
 123
 124 static struct platform_device sti_device = {
 125         .name           = "sti",
 126         .id             = -1,
 127         .num_resources  = ARRAY_SIZE(sti_resources),
 128         .resource       = sti_resources,
 129 };
 130
 131 static inline void omap_init_sti(void)
 132 {
 133         platform_device_register(&sti_device);
 134 }
 135 #else
 136 static inline void omap_init_sti(void) {}
 137 #endif
 138
 139 /*-------------------------------------------------------------------------*/
 140
 141 /*
 142  * This gets called after board-specific INIT_MACHINE, and initializes most
 143  * on-chip peripherals accessible on this board (except for few like USB):
 144  *
 145  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 146  *      code will have muxed GPIO pins and done "nonstandard" setup;
 147  *      that code could live in the boot loader.
 148  *  (b) Populating board-specific platform_data with the data drivers
 149  *      rely on to handle wiring variations.
 150  *  (c) Creating platform devices as meaningful on this board and
 151  *      with this kernel configuration.
 152  *
 153  * Claiming GPIOs, and setting their direction and initial values, is the
 154  * responsibility of the device drivers.  So is responding to probe().
 155  *
 156  * Board-specific knowlege like creating devices or pin setup is to be
 157  * kept out of drivers as much as possible.  In particular, pin setup
 158  * may be handled by the boot loader, and drivers should expect it will
 159  * normally have been done by the time they're probed.
 160  */
 161 static int __init omap1_init_devices(void)
 162 {
 163         /* please keep these calls, and their implementations above,
 164          * in alphabetical order so they're easier to sort through.
 165          */
 166
 167         omap_init_mbox();
 168         omap_init_rtc();
 169         omap_init_sti();
 170
 171         return 0;
 172 }
 173 arch_initcall(omap1_init_devices);
 174