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