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 25 /* 26 * The machine specific code may provide the extra mapping besides the 27 * default mapping provided here. 28 */ 29 static struct map_desc omap_io_desc[] __initdata = { 30 { 31 .virtual = OMAP1_IO_VIRT, 32 .pfn = __phys_to_pfn(OMAP1_IO_PHYS), 33 .length = OMAP1_IO_SIZE, 34 .type = MT_DEVICE 35 } 36 }; 37 38 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 39 static struct map_desc omap7xx_io_desc[] __initdata = { 40 { 41 .virtual = OMAP7XX_DSP_BASE, 42 .pfn = __phys_to_pfn(OMAP7XX_DSP_START), 43 .length = OMAP7XX_DSP_SIZE, 44 .type = MT_DEVICE 45 }, { 46 .virtual = OMAP7XX_DSPREG_BASE, 47 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START), 48 .length = OMAP7XX_DSPREG_SIZE, 49 .type = MT_DEVICE 50 } 51 }; 52 #endif 53 54 #ifdef CONFIG_ARCH_OMAP15XX 55 static struct map_desc omap1510_io_desc[] __initdata = { 56 { 57 .virtual = OMAP1510_DSP_BASE, 58 .pfn = __phys_to_pfn(OMAP1510_DSP_START), 59 .length = OMAP1510_DSP_SIZE, 60 .type = MT_DEVICE 61 }, { 62 .virtual = OMAP1510_DSPREG_BASE, 63 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START), 64 .length = OMAP1510_DSPREG_SIZE, 65 .type = MT_DEVICE 66 } 67 }; 68 #endif 69 70 #if defined(CONFIG_ARCH_OMAP16XX) 71 static struct map_desc omap16xx_io_desc[] __initdata = { 72 { 73 .virtual = OMAP16XX_DSP_BASE, 74 .pfn = __phys_to_pfn(OMAP16XX_DSP_START), 75 .length = OMAP16XX_DSP_SIZE, 76 .type = MT_DEVICE 77 }, { 78 .virtual = OMAP16XX_DSPREG_BASE, 79 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START), 80 .length = OMAP16XX_DSPREG_SIZE, 81 .type = MT_DEVICE 82 } 83 }; 84 #endif 85 86 /* 87 * Maps common IO regions for omap1 88 */ 89 static void __init omap1_map_common_io(void) 90 { 91 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 92 } 93 94 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 95 void __init omap7xx_map_io(void) 96 { 97 omap1_map_common_io(); 98 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 99 } 100 #endif 101 102 #ifdef CONFIG_ARCH_OMAP15XX 103 void __init omap15xx_map_io(void) 104 { 105 omap1_map_common_io(); 106 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 107 } 108 #endif 109 110 #if defined(CONFIG_ARCH_OMAP16XX) 111 void __init omap16xx_map_io(void) 112 { 113 omap1_map_common_io(); 114 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 115 } 116 #endif 117 118 /* 119 * Common low-level hardware init for omap1. 120 */ 121 void omap1_init_early(void) 122 { 123 omap_check_revision(); 124 125 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 126 * on a Posted Write in the TIPB Bridge". 127 */ 128 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 129 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 130 131 /* Must init clocks early to assure that timer interrupt works 132 */ 133 omap1_clk_init(); 134 omap1_mux_init(); 135 omap_init_consistent_dma_size(); 136 } 137 138 /* 139 * NOTE: Please use ioremap + __raw_read/write where possible instead of these 140 */ 141 142 u8 omap_readb(u32 pa) 143 { 144 return __raw_readb(OMAP1_IO_ADDRESS(pa)); 145 } 146 EXPORT_SYMBOL(omap_readb); 147 148 u16 omap_readw(u32 pa) 149 { 150 return __raw_readw(OMAP1_IO_ADDRESS(pa)); 151 } 152 EXPORT_SYMBOL(omap_readw); 153 154 u32 omap_readl(u32 pa) 155 { 156 return __raw_readl(OMAP1_IO_ADDRESS(pa)); 157 } 158 EXPORT_SYMBOL(omap_readl); 159 160 void omap_writeb(u8 v, u32 pa) 161 { 162 __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); 163 } 164 EXPORT_SYMBOL(omap_writeb); 165 166 void omap_writew(u16 v, u32 pa) 167 { 168 __raw_writew(v, OMAP1_IO_ADDRESS(pa)); 169 } 170 EXPORT_SYMBOL(omap_writew); 171 172 void omap_writel(u32 v, u32 pa) 173 { 174 __raw_writel(v, OMAP1_IO_ADDRESS(pa)); 175 } 176 EXPORT_SYMBOL(omap_writel); 177