1 /* 2 * arch/arm/mach-ep93xx/ts72xx.c 3 * Technologic Systems TS72xx SBC support. 4 * 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or (at 10 * your option) any later version. 11 */ 12 13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 14 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/platform_device.h> 18 #include <linux/io.h> 19 #include <linux/m48t86.h> 20 #include <linux/mtd/nand.h> 21 #include <linux/mtd/partitions.h> 22 23 #include <mach/hardware.h> 24 #include <mach/ts72xx.h> 25 26 #include <asm/hardware/vic.h> 27 #include <asm/mach-types.h> 28 #include <asm/mach/map.h> 29 #include <asm/mach/arch.h> 30 31 #include "soc.h" 32 33 static struct map_desc ts72xx_io_desc[] __initdata = { 34 { 35 .virtual = TS72XX_MODEL_VIRT_BASE, 36 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE), 37 .length = TS72XX_MODEL_SIZE, 38 .type = MT_DEVICE, 39 }, { 40 .virtual = TS72XX_OPTIONS_VIRT_BASE, 41 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE), 42 .length = TS72XX_OPTIONS_SIZE, 43 .type = MT_DEVICE, 44 }, { 45 .virtual = TS72XX_OPTIONS2_VIRT_BASE, 46 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE), 47 .length = TS72XX_OPTIONS2_SIZE, 48 .type = MT_DEVICE, 49 }, { 50 .virtual = TS72XX_RTC_INDEX_VIRT_BASE, 51 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE), 52 .length = TS72XX_RTC_INDEX_SIZE, 53 .type = MT_DEVICE, 54 }, { 55 .virtual = TS72XX_RTC_DATA_VIRT_BASE, 56 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE), 57 .length = TS72XX_RTC_DATA_SIZE, 58 .type = MT_DEVICE, 59 } 60 }; 61 62 static void __init ts72xx_map_io(void) 63 { 64 ep93xx_map_io(); 65 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc)); 66 } 67 68 69 /************************************************************************* 70 * NAND flash 71 *************************************************************************/ 72 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */ 73 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */ 74 75 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd, 76 int cmd, unsigned int ctrl) 77 { 78 struct nand_chip *chip = mtd->priv; 79 80 if (ctrl & NAND_CTRL_CHANGE) { 81 void __iomem *addr = chip->IO_ADDR_R; 82 unsigned char bits; 83 84 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE); 85 86 bits = __raw_readb(addr) & ~0x07; 87 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */ 88 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */ 89 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */ 90 91 __raw_writeb(bits, addr); 92 } 93 94 if (cmd != NAND_CMD_NONE) 95 __raw_writeb(cmd, chip->IO_ADDR_W); 96 } 97 98 static int ts72xx_nand_device_ready(struct mtd_info *mtd) 99 { 100 struct nand_chip *chip = mtd->priv; 101 void __iomem *addr = chip->IO_ADDR_R; 102 103 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE); 104 105 return !!(__raw_readb(addr) & 0x20); 106 } 107 108 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K) 109 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M) 110 111 static struct mtd_partition ts72xx_nand_parts[] = { 112 { 113 .name = "TS-BOOTROM", 114 .offset = 0, 115 .size = TS72XX_BOOTROM_PART_SIZE, 116 .mask_flags = MTD_WRITEABLE, /* force read-only */ 117 }, { 118 .name = "Linux", 119 .offset = MTDPART_OFS_RETAIN, 120 .size = TS72XX_REDBOOT_PART_SIZE, 121 /* leave so much for last partition */ 122 }, { 123 .name = "RedBoot", 124 .offset = MTDPART_OFS_APPEND, 125 .size = MTDPART_SIZ_FULL, 126 .mask_flags = MTD_WRITEABLE, /* force read-only */ 127 }, 128 }; 129 130 static struct platform_nand_data ts72xx_nand_data = { 131 .chip = { 132 .nr_chips = 1, 133 .chip_offset = 0, 134 .chip_delay = 15, 135 .partitions = ts72xx_nand_parts, 136 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts), 137 }, 138 .ctrl = { 139 .cmd_ctrl = ts72xx_nand_hwcontrol, 140 .dev_ready = ts72xx_nand_device_ready, 141 }, 142 }; 143 144 static struct resource ts72xx_nand_resource[] = { 145 { 146 .start = 0, /* filled in later */ 147 .end = 0, /* filled in later */ 148 .flags = IORESOURCE_MEM, 149 }, 150 }; 151 152 static struct platform_device ts72xx_nand_flash = { 153 .name = "gen_nand", 154 .id = -1, 155 .dev.platform_data = &ts72xx_nand_data, 156 .resource = ts72xx_nand_resource, 157 .num_resources = ARRAY_SIZE(ts72xx_nand_resource), 158 }; 159 160 161 static void __init ts72xx_register_flash(void) 162 { 163 /* 164 * TS7200 has NOR flash all other TS72xx board have NAND flash. 165 */ 166 if (board_is_ts7200()) { 167 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M); 168 } else { 169 resource_size_t start; 170 171 if (is_ts9420_installed()) 172 start = EP93XX_CS7_PHYS_BASE; 173 else 174 start = EP93XX_CS6_PHYS_BASE; 175 176 ts72xx_nand_resource[0].start = start; 177 ts72xx_nand_resource[0].end = start + SZ_16M - 1; 178 179 platform_device_register(&ts72xx_nand_flash); 180 } 181 } 182 183 184 static unsigned char ts72xx_rtc_readbyte(unsigned long addr) 185 { 186 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 187 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE); 188 } 189 190 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr) 191 { 192 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 193 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE); 194 } 195 196 static struct m48t86_ops ts72xx_rtc_ops = { 197 .readbyte = ts72xx_rtc_readbyte, 198 .writebyte = ts72xx_rtc_writebyte, 199 }; 200 201 static struct platform_device ts72xx_rtc_device = { 202 .name = "rtc-m48t86", 203 .id = -1, 204 .dev = { 205 .platform_data = &ts72xx_rtc_ops, 206 }, 207 .num_resources = 0, 208 }; 209 210 static struct resource ts72xx_wdt_resources[] = { 211 { 212 .start = TS72XX_WDT_CONTROL_PHYS_BASE, 213 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1, 214 .flags = IORESOURCE_MEM, 215 }, 216 { 217 .start = TS72XX_WDT_FEED_PHYS_BASE, 218 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1, 219 .flags = IORESOURCE_MEM, 220 }, 221 }; 222 223 static struct platform_device ts72xx_wdt_device = { 224 .name = "ts72xx-wdt", 225 .id = -1, 226 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources), 227 .resource = ts72xx_wdt_resources, 228 }; 229 230 static struct ep93xx_eth_data __initdata ts72xx_eth_data = { 231 .phy_id = 1, 232 }; 233 234 static void __init ts72xx_init_machine(void) 235 { 236 ep93xx_init_devices(); 237 ts72xx_register_flash(); 238 platform_device_register(&ts72xx_rtc_device); 239 platform_device_register(&ts72xx_wdt_device); 240 241 ep93xx_register_eth(&ts72xx_eth_data, 1); 242 } 243 244 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC") 245 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */ 246 .atag_offset = 0x100, 247 .map_io = ts72xx_map_io, 248 .init_irq = ep93xx_init_irq, 249 .handle_irq = vic_handle_irq, 250 .timer = &ep93xx_timer, 251 .init_machine = ts72xx_init_machine, 252 .init_late = ep93xx_init_late, 253 .restart = ep93xx_restart, 254 MACHINE_END 255