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