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 25 #include <asm/mach-types.h> 26 #include <asm/mach/map.h> 27 #include <asm/mach/arch.h> 28 29 #include "soc.h" 30 #include "ts72xx.h" 31 32 static struct map_desc ts72xx_io_desc[] __initdata = { 33 { 34 .virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE, 35 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE), 36 .length = TS72XX_MODEL_SIZE, 37 .type = MT_DEVICE, 38 }, { 39 .virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE, 40 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE), 41 .length = TS72XX_OPTIONS_SIZE, 42 .type = MT_DEVICE, 43 }, { 44 .virtual = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE, 45 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE), 46 .length = TS72XX_OPTIONS2_SIZE, 47 .type = MT_DEVICE, 48 }, { 49 .virtual = (unsigned long)TS72XX_RTC_INDEX_VIRT_BASE, 50 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE), 51 .length = TS72XX_RTC_INDEX_SIZE, 52 .type = MT_DEVICE, 53 }, { 54 .virtual = (unsigned long)TS72XX_RTC_DATA_VIRT_BASE, 55 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE), 56 .length = TS72XX_RTC_DATA_SIZE, 57 .type = MT_DEVICE, 58 } 59 }; 60 61 static void __init ts72xx_map_io(void) 62 { 63 ep93xx_map_io(); 64 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc)); 65 } 66 67 68 /************************************************************************* 69 * NAND flash 70 *************************************************************************/ 71 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */ 72 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */ 73 74 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd, 75 int cmd, unsigned int ctrl) 76 { 77 struct nand_chip *chip = mtd->priv; 78 79 if (ctrl & NAND_CTRL_CHANGE) { 80 void __iomem *addr = chip->IO_ADDR_R; 81 unsigned char bits; 82 83 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE); 84 85 bits = __raw_readb(addr) & ~0x07; 86 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */ 87 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */ 88 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */ 89 90 __raw_writeb(bits, addr); 91 } 92 93 if (cmd != NAND_CMD_NONE) 94 __raw_writeb(cmd, chip->IO_ADDR_W); 95 } 96 97 static int ts72xx_nand_device_ready(struct mtd_info *mtd) 98 { 99 struct nand_chip *chip = mtd->priv; 100 void __iomem *addr = chip->IO_ADDR_R; 101 102 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE); 103 104 return !!(__raw_readb(addr) & 0x20); 105 } 106 107 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K) 108 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M) 109 110 static struct mtd_partition ts72xx_nand_parts[] = { 111 { 112 .name = "TS-BOOTROM", 113 .offset = 0, 114 .size = TS72XX_BOOTROM_PART_SIZE, 115 .mask_flags = MTD_WRITEABLE, /* force read-only */ 116 }, { 117 .name = "Linux", 118 .offset = MTDPART_OFS_RETAIN, 119 .size = TS72XX_REDBOOT_PART_SIZE, 120 /* leave so much for last partition */ 121 }, { 122 .name = "RedBoot", 123 .offset = MTDPART_OFS_APPEND, 124 .size = MTDPART_SIZ_FULL, 125 .mask_flags = MTD_WRITEABLE, /* force read-only */ 126 }, 127 }; 128 129 static struct platform_nand_data ts72xx_nand_data = { 130 .chip = { 131 .nr_chips = 1, 132 .chip_offset = 0, 133 .chip_delay = 15, 134 .partitions = ts72xx_nand_parts, 135 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts), 136 }, 137 .ctrl = { 138 .cmd_ctrl = ts72xx_nand_hwcontrol, 139 .dev_ready = ts72xx_nand_device_ready, 140 }, 141 }; 142 143 static struct resource ts72xx_nand_resource[] = { 144 { 145 .start = 0, /* filled in later */ 146 .end = 0, /* filled in later */ 147 .flags = IORESOURCE_MEM, 148 }, 149 }; 150 151 static struct platform_device ts72xx_nand_flash = { 152 .name = "gen_nand", 153 .id = -1, 154 .dev.platform_data = &ts72xx_nand_data, 155 .resource = ts72xx_nand_resource, 156 .num_resources = ARRAY_SIZE(ts72xx_nand_resource), 157 }; 158 159 160 static void __init ts72xx_register_flash(void) 161 { 162 /* 163 * TS7200 has NOR flash all other TS72xx board have NAND flash. 164 */ 165 if (board_is_ts7200()) { 166 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M); 167 } else { 168 resource_size_t start; 169 170 if (is_ts9420_installed()) 171 start = EP93XX_CS7_PHYS_BASE; 172 else 173 start = EP93XX_CS6_PHYS_BASE; 174 175 ts72xx_nand_resource[0].start = start; 176 ts72xx_nand_resource[0].end = start + SZ_16M - 1; 177 178 platform_device_register(&ts72xx_nand_flash); 179 } 180 } 181 182 183 static unsigned char ts72xx_rtc_readbyte(unsigned long addr) 184 { 185 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 186 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE); 187 } 188 189 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr) 190 { 191 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 192 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE); 193 } 194 195 static struct m48t86_ops ts72xx_rtc_ops = { 196 .readbyte = ts72xx_rtc_readbyte, 197 .writebyte = ts72xx_rtc_writebyte, 198 }; 199 200 static struct platform_device ts72xx_rtc_device = { 201 .name = "rtc-m48t86", 202 .id = -1, 203 .dev = { 204 .platform_data = &ts72xx_rtc_ops, 205 }, 206 .num_resources = 0, 207 }; 208 209 static struct resource ts72xx_wdt_resources[] = { 210 { 211 .start = TS72XX_WDT_CONTROL_PHYS_BASE, 212 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1, 213 .flags = IORESOURCE_MEM, 214 }, 215 { 216 .start = TS72XX_WDT_FEED_PHYS_BASE, 217 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1, 218 .flags = IORESOURCE_MEM, 219 }, 220 }; 221 222 static struct platform_device ts72xx_wdt_device = { 223 .name = "ts72xx-wdt", 224 .id = -1, 225 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources), 226 .resource = ts72xx_wdt_resources, 227 }; 228 229 static struct ep93xx_eth_data __initdata ts72xx_eth_data = { 230 .phy_id = 1, 231 }; 232 233 static void __init ts72xx_init_machine(void) 234 { 235 ep93xx_init_devices(); 236 ts72xx_register_flash(); 237 platform_device_register(&ts72xx_rtc_device); 238 platform_device_register(&ts72xx_wdt_device); 239 240 ep93xx_register_eth(&ts72xx_eth_data, 1); 241 } 242 243 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC") 244 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */ 245 .atag_offset = 0x100, 246 .map_io = ts72xx_map_io, 247 .init_irq = ep93xx_init_irq, 248 .init_time = ep93xx_timer_init, 249 .init_machine = ts72xx_init_machine, 250 .init_late = ep93xx_init_late, 251 .restart = ep93xx_restart, 252 MACHINE_END 253