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