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 22 #include "iomap.h" 23 #include "common.h" 24 #include "clock.h" 25 26 extern void omap_check_revision(void); 27 28 /* 29 * The machine specific code may provide the extra mapping besides the 30 * default mapping provided here. 31 */ 32 static struct map_desc omap_io_desc[] __initdata = { 33 { 34 .virtual = OMAP1_IO_VIRT, 35 .pfn = __phys_to_pfn(OMAP1_IO_PHYS), 36 .length = OMAP1_IO_SIZE, 37 .type = MT_DEVICE 38 } 39 }; 40 41 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 42 static struct map_desc omap7xx_io_desc[] __initdata = { 43 { 44 .virtual = OMAP7XX_DSP_BASE, 45 .pfn = __phys_to_pfn(OMAP7XX_DSP_START), 46 .length = OMAP7XX_DSP_SIZE, 47 .type = MT_DEVICE 48 }, { 49 .virtual = OMAP7XX_DSPREG_BASE, 50 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START), 51 .length = OMAP7XX_DSPREG_SIZE, 52 .type = MT_DEVICE 53 } 54 }; 55 #endif 56 57 #ifdef CONFIG_ARCH_OMAP15XX 58 static struct map_desc omap1510_io_desc[] __initdata = { 59 { 60 .virtual = OMAP1510_DSP_BASE, 61 .pfn = __phys_to_pfn(OMAP1510_DSP_START), 62 .length = OMAP1510_DSP_SIZE, 63 .type = MT_DEVICE 64 }, { 65 .virtual = OMAP1510_DSPREG_BASE, 66 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START), 67 .length = OMAP1510_DSPREG_SIZE, 68 .type = MT_DEVICE 69 } 70 }; 71 #endif 72 73 #if defined(CONFIG_ARCH_OMAP16XX) 74 static struct map_desc omap16xx_io_desc[] __initdata = { 75 { 76 .virtual = OMAP16XX_DSP_BASE, 77 .pfn = __phys_to_pfn(OMAP16XX_DSP_START), 78 .length = OMAP16XX_DSP_SIZE, 79 .type = MT_DEVICE 80 }, { 81 .virtual = OMAP16XX_DSPREG_BASE, 82 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START), 83 .length = OMAP16XX_DSPREG_SIZE, 84 .type = MT_DEVICE 85 } 86 }; 87 #endif 88 89 /* 90 * Maps common IO regions for omap1 91 */ 92 static void __init omap1_map_common_io(void) 93 { 94 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 95 } 96 97 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 98 void __init omap7xx_map_io(void) 99 { 100 omap1_map_common_io(); 101 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 102 } 103 #endif 104 105 #ifdef CONFIG_ARCH_OMAP15XX 106 void __init omap15xx_map_io(void) 107 { 108 omap1_map_common_io(); 109 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 110 } 111 #endif 112 113 #if defined(CONFIG_ARCH_OMAP16XX) 114 void __init omap16xx_map_io(void) 115 { 116 omap1_map_common_io(); 117 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 118 } 119 #endif 120 121 /* 122 * Common low-level hardware init for omap1. 123 */ 124 void __init omap1_init_early(void) 125 { 126 omap_check_revision(); 127 128 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 129 * on a Posted Write in the TIPB Bridge". 130 */ 131 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 132 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 133 134 /* Must init clocks early to assure that timer interrupt works 135 */ 136 omap1_clk_init(); 137 omap1_mux_init(); 138 omap_init_consistent_dma_size(); 139 } 140 141 void __init omap1_init_late(void) 142 { 143 omap_serial_wakeup_init(); 144 } 145 146 /* 147 * NOTE: Please use ioremap + __raw_read/write where possible instead of these 148 */ 149 150 u8 omap_readb(u32 pa) 151 { 152 return __raw_readb(OMAP1_IO_ADDRESS(pa)); 153 } 154 EXPORT_SYMBOL(omap_readb); 155 156 u16 omap_readw(u32 pa) 157 { 158 return __raw_readw(OMAP1_IO_ADDRESS(pa)); 159 } 160 EXPORT_SYMBOL(omap_readw); 161 162 u32 omap_readl(u32 pa) 163 { 164 return __raw_readl(OMAP1_IO_ADDRESS(pa)); 165 } 166 EXPORT_SYMBOL(omap_readl); 167 168 void omap_writeb(u8 v, u32 pa) 169 { 170 __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); 171 } 172 EXPORT_SYMBOL(omap_writeb); 173 174 void omap_writew(u16 v, u32 pa) 175 { 176 __raw_writew(v, OMAP1_IO_ADDRESS(pa)); 177 } 178 EXPORT_SYMBOL(omap_writew); 179 180 void omap_writel(u32 v, u32 pa) 181 { 182 __raw_writel(v, OMAP1_IO_ADDRESS(pa)); 183 } 184 EXPORT_SYMBOL(omap_writel); 185