1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/arch/arm/mach-omap1/io.c 4 * 5 * OMAP1 I/O mapping code 6 */ 7 8 #include <linux/module.h> 9 #include <linux/kernel.h> 10 #include <linux/init.h> 11 #include <linux/io.h> 12 #include <linux/omap-dma.h> 13 14 #include <asm/tlb.h> 15 #include <asm/mach/map.h> 16 17 #include "tc.h" 18 #include "iomap.h" 19 #include "common.h" 20 21 /* 22 * The machine specific code may provide the extra mapping besides the 23 * default mapping provided here. 24 */ 25 static struct map_desc omap_io_desc[] __initdata = { 26 { 27 .virtual = OMAP1_IO_VIRT, 28 .pfn = __phys_to_pfn(OMAP1_IO_PHYS), 29 .length = OMAP1_IO_SIZE, 30 .type = MT_DEVICE 31 } 32 }; 33 34 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 35 static struct map_desc omap7xx_io_desc[] __initdata = { 36 { 37 .virtual = OMAP7XX_DSP_BASE, 38 .pfn = __phys_to_pfn(OMAP7XX_DSP_START), 39 .length = OMAP7XX_DSP_SIZE, 40 .type = MT_DEVICE 41 }, { 42 .virtual = OMAP7XX_DSPREG_BASE, 43 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START), 44 .length = OMAP7XX_DSPREG_SIZE, 45 .type = MT_DEVICE 46 } 47 }; 48 #endif 49 50 #ifdef CONFIG_ARCH_OMAP15XX 51 static struct map_desc omap1510_io_desc[] __initdata = { 52 { 53 .virtual = OMAP1510_DSP_BASE, 54 .pfn = __phys_to_pfn(OMAP1510_DSP_START), 55 .length = OMAP1510_DSP_SIZE, 56 .type = MT_DEVICE 57 }, { 58 .virtual = OMAP1510_DSPREG_BASE, 59 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START), 60 .length = OMAP1510_DSPREG_SIZE, 61 .type = MT_DEVICE 62 } 63 }; 64 #endif 65 66 #if defined(CONFIG_ARCH_OMAP16XX) 67 static struct map_desc omap16xx_io_desc[] __initdata = { 68 { 69 .virtual = OMAP16XX_DSP_BASE, 70 .pfn = __phys_to_pfn(OMAP16XX_DSP_START), 71 .length = OMAP16XX_DSP_SIZE, 72 .type = MT_DEVICE 73 }, { 74 .virtual = OMAP16XX_DSPREG_BASE, 75 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START), 76 .length = OMAP16XX_DSPREG_SIZE, 77 .type = MT_DEVICE 78 } 79 }; 80 #endif 81 82 /* 83 * Maps common IO regions for omap1 84 */ 85 static void __init omap1_map_common_io(void) 86 { 87 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); 88 } 89 90 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) 91 void __init omap7xx_map_io(void) 92 { 93 omap1_map_common_io(); 94 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); 95 } 96 #endif 97 98 #ifdef CONFIG_ARCH_OMAP15XX 99 void __init omap15xx_map_io(void) 100 { 101 omap1_map_common_io(); 102 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); 103 } 104 #endif 105 106 #if defined(CONFIG_ARCH_OMAP16XX) 107 void __init omap16xx_map_io(void) 108 { 109 omap1_map_common_io(); 110 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); 111 } 112 #endif 113 114 /* 115 * Common low-level hardware init for omap1. 116 */ 117 void __init omap1_init_early(void) 118 { 119 omap_check_revision(); 120 121 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort 122 * on a Posted Write in the TIPB Bridge". 123 */ 124 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); 125 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); 126 } 127 128 void __init omap1_init_late(void) 129 { 130 omap_serial_wakeup_init(); 131 } 132 133 /* 134 * NOTE: Please use ioremap + __raw_read/write where possible instead of these 135 */ 136 137 u8 omap_readb(u32 pa) 138 { 139 return __raw_readb(OMAP1_IO_ADDRESS(pa)); 140 } 141 EXPORT_SYMBOL(omap_readb); 142 143 u16 omap_readw(u32 pa) 144 { 145 return __raw_readw(OMAP1_IO_ADDRESS(pa)); 146 } 147 EXPORT_SYMBOL(omap_readw); 148 149 u32 omap_readl(u32 pa) 150 { 151 return __raw_readl(OMAP1_IO_ADDRESS(pa)); 152 } 153 EXPORT_SYMBOL(omap_readl); 154 155 void omap_writeb(u8 v, u32 pa) 156 { 157 __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); 158 } 159 EXPORT_SYMBOL(omap_writeb); 160 161 void omap_writew(u16 v, u32 pa) 162 { 163 __raw_writew(v, OMAP1_IO_ADDRESS(pa)); 164 } 165 EXPORT_SYMBOL(omap_writew); 166 167 void omap_writel(u32 v, u32 pa) 168 { 169 __raw_writel(v, OMAP1_IO_ADDRESS(pa)); 170 } 171 EXPORT_SYMBOL(omap_writel); 172