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 89 */ 90 static void __init omap1_map_common_io(void) 91 { 92 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 93 } 94 95 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 96 void __init omap7xx_map_io(void) 97 { 98 omap1_map_common_io(); 99 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 100 } 101 #endif 102 103 #ifdef CONFIG_ARCH_OMAP15XX 104 void __init omap15xx_map_io(void) 105 { 106 omap1_map_common_io(); 107 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 108 } 109 #endif 110 111 #if defined(CONFIG_ARCH_OMAP16XX) 112 void __init omap16xx_map_io(void) 113 { 114 omap1_map_common_io(); 115 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 116 } 117 #endif 118 119 /* 120 * Common low-level hardware init for omap1. 121 */ 122 void omap1_init_early(void) 123 { 124 omap_check_revision(); 125 126 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 127 * on a Posted Write in the TIPB Bridge". 128 */ 129 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 130 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 131 132 /* Must init clocks early to assure that timer interrupt works 133 */ 134 omap1_clk_init(); 135 omap1_mux_init(); 136 omap_sram_init(); 137 } 138 139 /* 140 * NOTE: Please use ioremap + __raw_read/write where possible instead of these 141 */ 142 143 u8 omap_readb(u32 pa) 144 { 145 return __raw_readb(OMAP1_IO_ADDRESS(pa)); 146 } 147 EXPORT_SYMBOL(omap_readb); 148 149 u16 omap_readw(u32 pa) 150 { 151 return __raw_readw(OMAP1_IO_ADDRESS(pa)); 152 } 153 EXPORT_SYMBOL(omap_readw); 154 155 u32 omap_readl(u32 pa) 156 { 157 return __raw_readl(OMAP1_IO_ADDRESS(pa)); 158 } 159 EXPORT_SYMBOL(omap_readl); 160 161 void omap_writeb(u8 v, u32 pa) 162 { 163 __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); 164 } 165 EXPORT_SYMBOL(omap_writeb); 166 167 void omap_writew(u16 v, u32 pa) 168 { 169 __raw_writew(v, OMAP1_IO_ADDRESS(pa)); 170 } 171 EXPORT_SYMBOL(omap_writew); 172 173 void omap_writel(u32 v, u32 pa) 174 { 175 __raw_writel(v, OMAP1_IO_ADDRESS(pa)); 176 } 177 EXPORT_SYMBOL(omap_writel); 178