1 /* 2 * linux/arch/arm/mach-omap1/io.c 3 * 4 * OMAP1 I/O mapping code 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 version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/io.h> 15 16 #include <asm/tlb.h> 17 #include <asm/mach/map.h> 18 #include <plat/mux.h> 19 #include <plat/tc.h> 20 21 #include "clock.h" 22 23 extern void omap_check_revision(void); 24 extern void omap_sram_init(void); 25 extern void omapfb_reserve_sdram(void); 26 27 /* 28 * The machine specific code may provide the extra mapping besides the 29 * default mapping provided here. 30 */ 31 static struct map_desc omap_io_desc[] __initdata = { 32 { 33 .virtual = OMAP1_IO_VIRT, 34 .pfn = __phys_to_pfn(OMAP1_IO_PHYS), 35 .length = OMAP1_IO_SIZE, 36 .type = MT_DEVICE 37 } 38 }; 39 40 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 41 static struct map_desc omap7xx_io_desc[] __initdata = { 42 { 43 .virtual = OMAP7XX_DSP_BASE, 44 .pfn = __phys_to_pfn(OMAP7XX_DSP_START), 45 .length = OMAP7XX_DSP_SIZE, 46 .type = MT_DEVICE 47 }, { 48 .virtual = OMAP7XX_DSPREG_BASE, 49 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START), 50 .length = OMAP7XX_DSPREG_SIZE, 51 .type = MT_DEVICE 52 } 53 }; 54 #endif 55 56 #ifdef CONFIG_ARCH_OMAP15XX 57 static struct map_desc omap1510_io_desc[] __initdata = { 58 { 59 .virtual = OMAP1510_DSP_BASE, 60 .pfn = __phys_to_pfn(OMAP1510_DSP_START), 61 .length = OMAP1510_DSP_SIZE, 62 .type = MT_DEVICE 63 }, { 64 .virtual = OMAP1510_DSPREG_BASE, 65 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START), 66 .length = OMAP1510_DSPREG_SIZE, 67 .type = MT_DEVICE 68 } 69 }; 70 #endif 71 72 #if defined(CONFIG_ARCH_OMAP16XX) 73 static struct map_desc omap16xx_io_desc[] __initdata = { 74 { 75 .virtual = OMAP16XX_DSP_BASE, 76 .pfn = __phys_to_pfn(OMAP16XX_DSP_START), 77 .length = OMAP16XX_DSP_SIZE, 78 .type = MT_DEVICE 79 }, { 80 .virtual = OMAP16XX_DSPREG_BASE, 81 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START), 82 .length = OMAP16XX_DSPREG_SIZE, 83 .type = MT_DEVICE 84 } 85 }; 86 #endif 87 88 /* 89 * Maps common IO regions for omap1. This should only get called from 90 * board specific init. 91 */ 92 void __init omap1_map_common_io(void) 93 { 94 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 95 96 /* Normally devicemaps_init() would flush caches and tlb after 97 * mdesc->map_io(), but we must also do it here because of the CPU 98 * revision check below. 99 */ 100 local_flush_tlb_all(); 101 flush_cache_all(); 102 103 /* We want to check CPU revision early for cpu_is_omapxxxx() macros. 104 * IO space mapping must be initialized before we can do that. 105 */ 106 omap_check_revision(); 107 108 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 109 if (cpu_is_omap7xx()) { 110 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 111 } 112 #endif 113 #ifdef CONFIG_ARCH_OMAP15XX 114 if (cpu_is_omap15xx()) { 115 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 116 } 117 #endif 118 #if defined(CONFIG_ARCH_OMAP16XX) 119 if (cpu_is_omap16xx()) { 120 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 121 } 122 #endif 123 124 omap_sram_init(); 125 omapfb_reserve_sdram(); 126 } 127 128 /* 129 * Common low-level hardware init for omap1. This should only get called from 130 * board specific init. 131 */ 132 void __init omap1_init_common_hw(void) 133 { 134 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 135 * on a Posted Write in the TIPB Bridge". 136 */ 137 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 138 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 139 140 /* Must init clocks early to assure that timer interrupt works 141 */ 142 omap1_clk_init(); 143 144 omap1_mux_init(); 145 } 146 147