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/config.h> 12 #include <linux/module.h> 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 16 #include <asm/mach/map.h> 17 #include <asm/io.h> 18 #include <asm/arch/mux.h> 19 #include <asm/arch/tc.h> 20 21 extern int omap1_clk_init(void); 22 extern void omap_check_revision(void); 23 extern void omap_sram_init(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 = IO_VIRT, 32 .pfn = __phys_to_pfn(IO_PHYS), 33 .length = IO_SIZE, 34 .type = MT_DEVICE 35 } 36 }; 37 38 #ifdef CONFIG_ARCH_OMAP730 39 static struct map_desc omap730_io_desc[] __initdata = { 40 { 41 .virtual = OMAP730_DSP_BASE, 42 .pfn = __phys_to_pfn(OMAP730_DSP_START), 43 .length = OMAP730_DSP_SIZE, 44 .type = MT_DEVICE 45 }, { 46 .virtual = OMAP730_DSPREG_BASE, 47 .pfn = __phys_to_pfn(OMAP730_DSPREG_START), 48 .length = OMAP730_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 static int initialized = 0; 87 88 static void __init _omap_map_io(void) 89 { 90 initialized = 1; 91 92 /* We have to initialize the IO space mapping before we can run 93 * cpu_is_omapxxx() macros. */ 94 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 95 omap_check_revision(); 96 97 #ifdef CONFIG_ARCH_OMAP730 98 if (cpu_is_omap730()) { 99 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc)); 100 } 101 #endif 102 #ifdef CONFIG_ARCH_OMAP15XX 103 if (cpu_is_omap1510()) { 104 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 105 } 106 #endif 107 #if defined(CONFIG_ARCH_OMAP16XX) 108 if (cpu_is_omap16xx()) { 109 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 110 } 111 #endif 112 113 omap_sram_init(); 114 115 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 116 * on a Posted Write in the TIPB Bridge". 117 */ 118 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 119 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 120 121 /* Must init clocks early to assure that timer interrupt works 122 */ 123 omap1_clk_init(); 124 } 125 126 /* 127 * This should only get called from board specific init 128 */ 129 void __init omap_map_common_io(void) 130 { 131 if (!initialized) { 132 _omap_map_io(); 133 omap1_mux_init(); 134 } 135 } 136 137