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 19 #include <plat/mux.h> 20 #include <plat/tc.h> 21 #include <plat/dma.h> 22 23 #include "iomap.h" 24 #include "common.h" 25 #include "clock.h" 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 90 */ 91 static void __init omap1_map_common_io(void) 92 { 93 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 94 } 95 96 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 97 void __init omap7xx_map_io(void) 98 { 99 omap1_map_common_io(); 100 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 101 } 102 #endif 103 104 #ifdef CONFIG_ARCH_OMAP15XX 105 void __init omap15xx_map_io(void) 106 { 107 omap1_map_common_io(); 108 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 109 } 110 #endif 111 112 #if defined(CONFIG_ARCH_OMAP16XX) 113 void __init omap16xx_map_io(void) 114 { 115 omap1_map_common_io(); 116 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 117 } 118 #endif 119 120 /* 121 * Common low-level hardware init for omap1. 122 */ 123 void __init omap1_init_early(void) 124 { 125 omap_check_revision(); 126 127 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 128 * on a Posted Write in the TIPB Bridge". 129 */ 130 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 131 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 132 133 /* Must init clocks early to assure that timer interrupt works 134 */ 135 omap1_clk_init(); 136 omap1_mux_init(); 137 omap_init_consistent_dma_size(); 138 } 139 140 void __init omap1_init_late(void) 141 { 142 omap_serial_wakeup_init(); 143 } 144 145 /* 146 * NOTE: Please use ioremap + __raw_read/write where possible instead of these 147 */ 148 149 u8 omap_readb(u32 pa) 150 { 151 return __raw_readb(OMAP1_IO_ADDRESS(pa)); 152 } 153 EXPORT_SYMBOL(omap_readb); 154 155 u16 omap_readw(u32 pa) 156 { 157 return __raw_readw(OMAP1_IO_ADDRESS(pa)); 158 } 159 EXPORT_SYMBOL(omap_readw); 160 161 u32 omap_readl(u32 pa) 162 { 163 return __raw_readl(OMAP1_IO_ADDRESS(pa)); 164 } 165 EXPORT_SYMBOL(omap_readl); 166 167 void omap_writeb(u8 v, u32 pa) 168 { 169 __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); 170 } 171 EXPORT_SYMBOL(omap_writeb); 172 173 void omap_writew(u16 v, u32 pa) 174 { 175 __raw_writew(v, OMAP1_IO_ADDRESS(pa)); 176 } 177 EXPORT_SYMBOL(omap_writew); 178 179 void omap_writel(u32 v, u32 pa) 180 { 181 __raw_writel(v, OMAP1_IO_ADDRESS(pa)); 182 } 183 EXPORT_SYMBOL(omap_writel); 184