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); 234 235