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 <asm/hardware.h>
  18 #include <asm/io.h>
  19 #include <asm/mach-types.h>
  20 #include <asm/mach/map.h>
  21
  22 #include <asm/arch/tc.h>
  23 #include <asm/arch/board.h>
  24 #include <asm/arch/mux.h>
  25 #include <asm/arch/gpio.h>
  26
  27 /*-------------------------------------------------------------------------*/
  28
  29 #if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)
  30
  31 #define OMAP_RTC_BASE           0xfffb4800
  32
  33 static struct resource rtc_resources[] = {
  34         {
  35                 .start          = OMAP_RTC_BASE,
  36                 .end            = OMAP_RTC_BASE + 0x5f,
  37                 .flags          = IORESOURCE_MEM,
  38         },
  39         {
  40                 .start          = INT_RTC_TIMER,
  41                 .flags          = IORESOURCE_IRQ,
  42         },
  43         {
  44                 .start          = INT_RTC_ALARM,
  45                 .flags          = IORESOURCE_IRQ,
  46         },
  47 };
  48
  49 static struct platform_device omap_rtc_device = {
  50         .name           = "omap_rtc",
  51         .id             = -1,
  52         .num_resources  = ARRAY_SIZE(rtc_resources),
  53         .resource       = rtc_resources,
  54 };
  55
  56 static void omap_init_rtc(void)
  57 {
  58         (void) platform_device_register(&omap_rtc_device);
  59 }
  60 #else
  61 static inline void omap_init_rtc(void) {}
  62 #endif
  63
  64 #if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)
  65
  66 #if defined(CONFIG_ARCH_OMAP15XX)
  67 #  define OMAP1_MBOX_SIZE       0x23
  68 #  define INT_DSP_MAILBOX1      INT_1510_DSP_MAILBOX1
  69 #elif defined(CONFIG_ARCH_OMAP16XX)
  70 #  define OMAP1_MBOX_SIZE       0x2f
  71 #  define INT_DSP_MAILBOX1      INT_1610_DSP_MAILBOX1
  72 #endif
  73
  74 #define OMAP1_MBOX_BASE         IO_ADDRESS(OMAP16XX_MAILBOX_BASE)
  75
  76 static struct resource mbox_resources[] = {
  77         {
  78                 .start          = OMAP1_MBOX_BASE,
  79                 .end            = OMAP1_MBOX_BASE + OMAP1_MBOX_SIZE,
  80                 .flags          = IORESOURCE_MEM,
  81         },
  82         {
  83                 .start          = INT_DSP_MAILBOX1,
  84                 .flags          = IORESOURCE_IRQ,
  85         },
  86 };
  87
  88 static struct platform_device mbox_device = {
  89         .name           = "mailbox",
  90         .id             = -1,
  91         .num_resources  = ARRAY_SIZE(mbox_resources),
  92         .resource       = mbox_resources,
  93 };
  94
  95 static inline void omap_init_mbox(void)
  96 {
  97         platform_device_register(&mbox_device);
  98 }
  99 #else
 100 static inline void omap_init_mbox(void) { }
 101 #endif
 102
 103 #if defined(CONFIG_OMAP_STI)
 104
 105 #define OMAP1_STI_BASE          IO_ADDRESS(0xfffea000)
 106 #define OMAP1_STI_CHANNEL_BASE  (OMAP1_STI_BASE + 0x400)
 107
 108 static struct resource sti_resources[] = {
 109         {
 110                 .start          = OMAP1_STI_BASE,
 111                 .end            = OMAP1_STI_BASE + SZ_1K - 1,
 112                 .flags          = IORESOURCE_MEM,
 113         },
 114         {
 115                 .start          = OMAP1_STI_CHANNEL_BASE,
 116                 .end            = OMAP1_STI_CHANNEL_BASE + SZ_1K - 1,
 117                 .flags          = IORESOURCE_MEM,
 118         },
 119         {
 120                 .start          = INT_1610_STI,
 121                 .flags          = IORESOURCE_IRQ,
 122         }
 123 };
 124
 125 static struct platform_device sti_device = {
 126         .name           = "sti",
 127         .id             = -1,
 128         .num_resources  = ARRAY_SIZE(sti_resources),
 129         .resource       = sti_resources,
 130 };
 131
 132 static inline void omap_init_sti(void)
 133 {
 134         platform_device_register(&sti_device);
 135 }
 136 #else
 137 static inline void omap_init_sti(void) {}
 138 #endif
 139
 140 /*-------------------------------------------------------------------------*/
 141
 142 /*
 143  * This gets called after board-specific INIT_MACHINE, and initializes most
 144  * on-chip peripherals accessible on this board (except for few like USB):
 145  *
 146  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 147  *      code will have muxed GPIO pins and done "nonstandard" setup;
 148  *      that code could live in the boot loader.
 149  *  (b) Populating board-specific platform_data with the data drivers
 150  *      rely on to handle wiring variations.
 151  *  (c) Creating platform devices as meaningful on this board and
 152  *      with this kernel configuration.
 153  *
 154  * Claiming GPIOs, and setting their direction and initial values, is the
 155  * responsibility of the device drivers.  So is responding to probe().
 156  *
 157  * Board-specific knowlege like creating devices or pin setup is to be
 158  * kept out of drivers as much as possible.  In particular, pin setup
 159  * may be handled by the boot loader, and drivers should expect it will
 160  * normally have been done by the time they're probed.
 161  */
 162 static int __init omap1_init_devices(void)
 163 {
 164         /* please keep these calls, and their implementations above,
 165          * in alphabetical order so they're easier to sort through.
 166          */
 167
 168         omap_init_mbox();
 169         omap_init_rtc();
 170         omap_init_sti();
 171
 172         return 0;
 173 }
 174 arch_initcall(omap1_init_devices);
 175