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/config.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/io.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/map.h>
  22
  23 #include <asm/arch/tc.h>
  24 #include <asm/arch/board.h>
  25 #include <asm/arch/mux.h>
  26 #include <asm/arch/gpio.h>
  27
  28 extern void omap_nop_release(struct device *dev);
  29
  30 /*-------------------------------------------------------------------------*/
  31
  32 #if     defined(CONFIG_OMAP1610_IR) || defined(CONFIG_OMAP161O_IR_MODULE)
  33
  34 static u64 irda_dmamask = 0xffffffff;
  35
  36 static struct platform_device omap1610ir_device = {
  37         .name = "omap1610-ir",
  38         .id = -1,
  39         .dev = {
  40                 .release        = omap_nop_release,
  41                 .dma_mask       = &irda_dmamask,
  42         },
  43 };
  44
  45 static void omap_init_irda(void)
  46 {
  47         /* FIXME define and use a boot tag, members something like:
  48          *  u8          uart;           // uart1, or uart3
  49          * ... but driver only handles uart3 for now
  50          *  s16         fir_sel;        // gpio for SIR vs FIR
  51          * ... may prefer a callback for SIR/MIR/FIR mode select;
  52          * while h2 uses a GPIO, H3 uses a gpio expander
  53          */
  54         if (machine_is_omap_h2()
  55                         || machine_is_omap_h3())
  56                 (void) platform_device_register(&omap1610ir_device);
  57 }
  58 #else
  59 static inline void omap_init_irda(void) {}
  60 #endif
  61
  62 /*-------------------------------------------------------------------------*/
  63
  64 #if     defined(CONFIG_OMAP_RTC) || defined(CONFIG_OMAP_RTC)
  65
  66 #define OMAP_RTC_BASE           0xfffb4800
  67
  68 static struct resource rtc_resources[] = {
  69         {
  70                 .start          = OMAP_RTC_BASE,
  71                 .end            = OMAP_RTC_BASE + 0x5f,
  72                 .flags          = IORESOURCE_MEM,
  73         },
  74         {
  75                 .start          = INT_RTC_TIMER,
  76                 .flags          = IORESOURCE_IRQ,
  77         },
  78         {
  79                 .start          = INT_RTC_ALARM,
  80                 .flags          = IORESOURCE_IRQ,
  81         },
  82 };
  83
  84 static struct platform_device omap_rtc_device = {
  85         .name           = "omap_rtc",
  86         .id             = -1,
  87         .dev = {
  88                 .release        = omap_nop_release,
  89         },
  90         .num_resources  = ARRAY_SIZE(rtc_resources),
  91         .resource       = rtc_resources,
  92 };
  93
  94 static void omap_init_rtc(void)
  95 {
  96         (void) platform_device_register(&omap_rtc_device);
  97 }
  98 #else
  99 static inline void omap_init_rtc(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         .dev = {
 128                 .release        = omap_nop_release,
 129         },
 130         .num_resources  = ARRAY_SIZE(sti_resources),
 131         .resource       = sti_resources,
 132 };
 133
 134 static inline void omap_init_sti(void)
 135 {
 136         platform_device_register(&sti_device);
 137 }
 138 #else
 139 static inline void omap_init_sti(void) {}
 140 #endif
 141
 142 /*-------------------------------------------------------------------------*/
 143
 144 /*
 145  * This gets called after board-specific INIT_MACHINE, and initializes most
 146  * on-chip peripherals accessible on this board (except for few like USB):
 147  *
 148  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 149  *      code will have muxed GPIO pins and done "nonstandard" setup;
 150  *      that code could live in the boot loader.
 151  *  (b) Populating board-specific platform_data with the data drivers
 152  *      rely on to handle wiring variations.
 153  *  (c) Creating platform devices as meaningful on this board and
 154  *      with this kernel configuration.
 155  *
 156  * Claiming GPIOs, and setting their direction and initial values, is the
 157  * responsibility of the device drivers.  So is responding to probe().
 158  *
 159  * Board-specific knowlege like creating devices or pin setup is to be
 160  * kept out of drivers as much as possible.  In particular, pin setup
 161  * may be handled by the boot loader, and drivers should expect it will
 162  * normally have been done by the time they're probed.
 163  */
 164 static int __init omap1_init_devices(void)
 165 {
 166         /* please keep these calls, and their implementations above,
 167          * in alphabetical order so they're easier to sort through.
 168          */
 169         omap_init_irda();
 170         omap_init_rtc();
 171         omap_init_sti();
 172
 173         return 0;
 174 }
 175 arch_initcall(omap1_init_devices);
 176