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 #include <linux/io.h>
  17
  18 #include <mach/hardware.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 #include <mach/mmc.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         OMAP1_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           = "omap1-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 /*-------------------------------------------------------------------------*/
 104
 105 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 106
 107 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
 108                         int controller_nr)
 109 {
 110         if (controller_nr == 0) {
 111                 omap_cfg_reg(MMC_CMD);
 112                 omap_cfg_reg(MMC_CLK);
 113                 omap_cfg_reg(MMC_DAT0);
 114                 if (cpu_is_omap1710()) {
 115                         omap_cfg_reg(M15_1710_MMC_CLKI);
 116                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
 117                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
 118                 }
 119                 if (mmc_controller->slots[0].wires == 4) {
 120                         omap_cfg_reg(MMC_DAT1);
 121                         /* NOTE: DAT2 can be on W10 (here) or M15 */
 122                         if (!mmc_controller->slots[0].nomux)
 123                                 omap_cfg_reg(MMC_DAT2);
 124                         omap_cfg_reg(MMC_DAT3);
 125                 }
 126         }
 127
 128         /* Block 2 is on newer chips, and has many pinout options */
 129         if (cpu_is_omap16xx() && controller_nr == 1) {
 130                 if (!mmc_controller->slots[1].nomux) {
 131                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 132                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 133                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 134                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 135                         if (mmc_controller->slots[1].wires == 4) {
 136                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 137                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 138                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 139                         }
 140
 141                         /* These are needed for the level shifter */
 142                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 143                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 144                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 145                 }
 146
 147                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 148                 if (cpu_is_omap1710())
 149                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 150                                         MOD_CONF_CTRL_1);
 151         }
 152 }
 153
 154 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 155                         int nr_controllers)
 156 {
 157         int i;
 158
 159         for (i = 0; i < nr_controllers; i++) {
 160                 unsigned long base, size;
 161                 unsigned int irq = 0;
 162
 163                 if (!mmc_data[i])
 164                         continue;
 165
 166                 omap1_mmc_mux(mmc_data[i], i);
 167
 168                 switch (i) {
 169                 case 0:
 170                         base = OMAP1_MMC1_BASE;
 171                         irq = INT_MMC;
 172                         break;
 173                 case 1:
 174                         if (!cpu_is_omap16xx())
 175                                 return;
 176                         base = OMAP1_MMC2_BASE;
 177                         irq = INT_1610_MMC2;
 178                         break;
 179                 default:
 180                         continue;
 181                 }
 182                 size = OMAP1_MMC_SIZE;
 183
 184                 omap_mmc_add("mmci-omap", i, base, size, irq, mmc_data[i]);
 185         };
 186 }
 187
 188 #endif
 189
 190 /*-------------------------------------------------------------------------*/
 191
 192 #if defined(CONFIG_OMAP_STI)
 193
 194 #define OMAP1_STI_BASE          0xfffea000
 195 #define OMAP1_STI_CHANNEL_BASE  (OMAP1_STI_BASE + 0x400)
 196
 197 static struct resource sti_resources[] = {
 198         {
 199                 .start          = OMAP1_STI_BASE,
 200                 .end            = OMAP1_STI_BASE + SZ_1K - 1,
 201                 .flags          = IORESOURCE_MEM,
 202         },
 203         {
 204                 .start          = OMAP1_STI_CHANNEL_BASE,
 205                 .end            = OMAP1_STI_CHANNEL_BASE + SZ_1K - 1,
 206                 .flags          = IORESOURCE_MEM,
 207         },
 208         {
 209                 .start          = INT_1610_STI,
 210                 .flags          = IORESOURCE_IRQ,
 211         }
 212 };
 213
 214 static struct platform_device sti_device = {
 215         .name           = "sti",
 216         .id             = -1,
 217         .num_resources  = ARRAY_SIZE(sti_resources),
 218         .resource       = sti_resources,
 219 };
 220
 221 static inline void omap_init_sti(void)
 222 {
 223         platform_device_register(&sti_device);
 224 }
 225 #else
 226 static inline void omap_init_sti(void) {}
 227 #endif
 228
 229 /*-------------------------------------------------------------------------*/
 230
 231 /*
 232  * This gets called after board-specific INIT_MACHINE, and initializes most
 233  * on-chip peripherals accessible on this board (except for few like USB):
 234  *
 235  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 236  *      code will have muxed GPIO pins and done "nonstandard" setup;
 237  *      that code could live in the boot loader.
 238  *  (b) Populating board-specific platform_data with the data drivers
 239  *      rely on to handle wiring variations.
 240  *  (c) Creating platform devices as meaningful on this board and
 241  *      with this kernel configuration.
 242  *
 243  * Claiming GPIOs, and setting their direction and initial values, is the
 244  * responsibility of the device drivers.  So is responding to probe().
 245  *
 246  * Board-specific knowlege like creating devices or pin setup is to be
 247  * kept out of drivers as much as possible.  In particular, pin setup
 248  * may be handled by the boot loader, and drivers should expect it will
 249  * normally have been done by the time they're probed.
 250  */
 251 static int __init omap1_init_devices(void)
 252 {
 253         /* please keep these calls, and their implementations above,
 254          * in alphabetical order so they're easier to sort through.
 255          */
 256
 257         omap_init_mbox();
 258         omap_init_rtc();
 259         omap_init_sti();
 260
 261         return 0;
 262 }
 263 arch_initcall(omap1_init_devices);
 264