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 #include <linux/spi/spi.h>
  18
  19 #include <mach/hardware.h>
  20 #include <asm/mach/map.h>
  21
  22 #include <plat/tc.h>
  23 #include <plat/board.h>
  24 #include <plat/mux.h>
  25 #include <mach/gpio.h>
  26 #include <plat/mmc.h>
  27 #include <plat/omap7xx.h>
  28
  29 /*-------------------------------------------------------------------------*/
  30
  31 #if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)
  32
  33 #define OMAP_RTC_BASE           0xfffb4800
  34
  35 static struct resource rtc_resources[] = {
  36         {
  37                 .start          = OMAP_RTC_BASE,
  38                 .end            = OMAP_RTC_BASE + 0x5f,
  39                 .flags          = IORESOURCE_MEM,
  40         },
  41         {
  42                 .start          = INT_RTC_TIMER,
  43                 .flags          = IORESOURCE_IRQ,
  44         },
  45         {
  46                 .start          = INT_RTC_ALARM,
  47                 .flags          = IORESOURCE_IRQ,
  48         },
  49 };
  50
  51 static struct platform_device omap_rtc_device = {
  52         .name           = "omap_rtc",
  53         .id             = -1,
  54         .num_resources  = ARRAY_SIZE(rtc_resources),
  55         .resource       = rtc_resources,
  56 };
  57
  58 static void omap_init_rtc(void)
  59 {
  60         (void) platform_device_register(&omap_rtc_device);
  61 }
  62 #else
  63 static inline void omap_init_rtc(void) {}
  64 #endif
  65
  66 static inline void omap_init_mbox(void) { }
  67
  68 /*-------------------------------------------------------------------------*/
  69
  70 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
  71
  72 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
  73                         int controller_nr)
  74 {
  75         if (controller_nr == 0) {
  76                 if (cpu_is_omap7xx()) {
  77                         omap_cfg_reg(MMC_7XX_CMD);
  78                         omap_cfg_reg(MMC_7XX_CLK);
  79                         omap_cfg_reg(MMC_7XX_DAT0);
  80                 } else {
  81                         omap_cfg_reg(MMC_CMD);
  82                         omap_cfg_reg(MMC_CLK);
  83                         omap_cfg_reg(MMC_DAT0);
  84                 }
  85
  86                 if (cpu_is_omap1710()) {
  87                         omap_cfg_reg(M15_1710_MMC_CLKI);
  88                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
  89                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
  90                 }
  91                 if (mmc_controller->slots[0].wires == 4 && !cpu_is_omap7xx()) {
  92                         omap_cfg_reg(MMC_DAT1);
  93                         /* NOTE: DAT2 can be on W10 (here) or M15 */
  94                         if (!mmc_controller->slots[0].nomux)
  95                                 omap_cfg_reg(MMC_DAT2);
  96                         omap_cfg_reg(MMC_DAT3);
  97                 }
  98         }
  99
 100         /* Block 2 is on newer chips, and has many pinout options */
 101         if (cpu_is_omap16xx() && controller_nr == 1) {
 102                 if (!mmc_controller->slots[1].nomux) {
 103                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 104                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 105                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 106                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 107                         if (mmc_controller->slots[1].wires == 4) {
 108                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 109                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 110                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 111                         }
 112
 113                         /* These are needed for the level shifter */
 114                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 115                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 116                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 117                 }
 118
 119                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 120                 if (cpu_is_omap1710())
 121                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 122                                         MOD_CONF_CTRL_1);
 123         }
 124 }
 125
 126 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 127                         int nr_controllers)
 128 {
 129         int i;
 130
 131         for (i = 0; i < nr_controllers; i++) {
 132                 unsigned long base, size;
 133                 unsigned int irq = 0;
 134
 135                 if (!mmc_data[i])
 136                         continue;
 137
 138                 omap1_mmc_mux(mmc_data[i], i);
 139
 140                 switch (i) {
 141                 case 0:
 142                         base = OMAP1_MMC1_BASE;
 143                         irq = INT_MMC;
 144                         break;
 145                 case 1:
 146                         if (!cpu_is_omap16xx())
 147                                 return;
 148                         base = OMAP1_MMC2_BASE;
 149                         irq = INT_1610_MMC2;
 150                         break;
 151                 default:
 152                         continue;
 153                 }
 154                 size = OMAP1_MMC_SIZE;
 155
 156                 omap_mmc_add("mmci-omap", i, base, size, irq, mmc_data[i]);
 157         };
 158 }
 159
 160 #endif
 161
 162 /*-------------------------------------------------------------------------*/
 163
 164 /* OMAP7xx SPI support */
 165 #if defined(CONFIG_SPI_OMAP_100K) || defined(CONFIG_SPI_OMAP_100K_MODULE)
 166
 167 struct platform_device omap_spi1 = {
 168         .name           = "omap1_spi100k",
 169         .id             = 1,
 170 };
 171
 172 struct platform_device omap_spi2 = {
 173         .name           = "omap1_spi100k",
 174         .id             = 2,
 175 };
 176
 177 static void omap_init_spi100k(void)
 178 {
 179         omap_spi1.dev.platform_data = ioremap(OMAP7XX_SPI1_BASE, 0x7ff);
 180         if (omap_spi1.dev.platform_data)
 181                 platform_device_register(&omap_spi1);
 182
 183         omap_spi2.dev.platform_data = ioremap(OMAP7XX_SPI2_BASE, 0x7ff);
 184         if (omap_spi2.dev.platform_data)
 185                 platform_device_register(&omap_spi2);
 186 }
 187
 188 #else
 189 static inline void omap_init_spi100k(void)
 190 {
 191 }
 192 #endif
 193
 194 /*-------------------------------------------------------------------------*/
 195
 196 static inline void omap_init_sti(void) {}
 197
 198 /*-------------------------------------------------------------------------*/
 199
 200 /*
 201  * This gets called after board-specific INIT_MACHINE, and initializes most
 202  * on-chip peripherals accessible on this board (except for few like USB):
 203  *
 204  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 205  *      code will have muxed GPIO pins and done "nonstandard" setup;
 206  *      that code could live in the boot loader.
 207  *  (b) Populating board-specific platform_data with the data drivers
 208  *      rely on to handle wiring variations.
 209  *  (c) Creating platform devices as meaningful on this board and
 210  *      with this kernel configuration.
 211  *
 212  * Claiming GPIOs, and setting their direction and initial values, is the
 213  * responsibility of the device drivers.  So is responding to probe().
 214  *
 215  * Board-specific knowlege like creating devices or pin setup is to be
 216  * kept out of drivers as much as possible.  In particular, pin setup
 217  * may be handled by the boot loader, and drivers should expect it will
 218  * normally have been done by the time they're probed.
 219  */
 220 static int __init omap1_init_devices(void)
 221 {
 222         /* please keep these calls, and their implementations above,
 223          * in alphabetical order so they're easier to sort through.
 224          */
 225
 226         omap_init_mbox();
 227         omap_init_rtc();
 228         omap_init_spi100k();
 229         omap_init_sti();
 230
 231         return 0;
 232 }
 233 arch_initcall(omap1_init_devices);
 234