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 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL }; 109 110 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K) 111 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M) 112 113 static struct mtd_partition ts72xx_nand_parts[] = { 114 { 115 .name = "TS-BOOTROM", 116 .offset = 0, 117 .size = TS72XX_BOOTROM_PART_SIZE, 118 .mask_flags = MTD_WRITEABLE, /* force read-only */ 119 }, { 120 .name = "Linux", 121 .offset = MTDPART_OFS_RETAIN, 122 .size = TS72XX_REDBOOT_PART_SIZE, 123 /* leave so much for last partition */ 124 }, { 125 .name = "RedBoot", 126 .offset = MTDPART_OFS_APPEND, 127 .size = MTDPART_SIZ_FULL, 128 .mask_flags = MTD_WRITEABLE, /* force read-only */ 129 }, 130 }; 131 132 static struct platform_nand_data ts72xx_nand_data = { 133 .chip = { 134 .nr_chips = 1, 135 .chip_offset = 0, 136 .chip_delay = 15, 137 .part_probe_types = ts72xx_nand_part_probes, 138 .partitions = ts72xx_nand_parts, 139 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts), 140 }, 141 .ctrl = { 142 .cmd_ctrl = ts72xx_nand_hwcontrol, 143 .dev_ready = ts72xx_nand_device_ready, 144 }, 145 }; 146 147 static struct resource ts72xx_nand_resource[] = { 148 { 149 .start = 0, /* filled in later */ 150 .end = 0, /* filled in later */ 151 .flags = IORESOURCE_MEM, 152 }, 153 }; 154 155 static struct platform_device ts72xx_nand_flash = { 156 .name = "gen_nand", 157 .id = -1, 158 .dev.platform_data = &ts72xx_nand_data, 159 .resource = ts72xx_nand_resource, 160 .num_resources = ARRAY_SIZE(ts72xx_nand_resource), 161 }; 162 163 164 static void __init ts72xx_register_flash(void) 165 { 166 /* 167 * TS7200 has NOR flash all other TS72xx board have NAND flash. 168 */ 169 if (board_is_ts7200()) { 170 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M); 171 } else { 172 resource_size_t start; 173 174 if (is_ts9420_installed()) 175 start = EP93XX_CS7_PHYS_BASE; 176 else 177 start = EP93XX_CS6_PHYS_BASE; 178 179 ts72xx_nand_resource[0].start = start; 180 ts72xx_nand_resource[0].end = start + SZ_16M - 1; 181 182 platform_device_register(&ts72xx_nand_flash); 183 } 184 } 185 186 187 static unsigned char ts72xx_rtc_readbyte(unsigned long addr) 188 { 189 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 190 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE); 191 } 192 193 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr) 194 { 195 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 196 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE); 197 } 198 199 static struct m48t86_ops ts72xx_rtc_ops = { 200 .readbyte = ts72xx_rtc_readbyte, 201 .writebyte = ts72xx_rtc_writebyte, 202 }; 203 204 static struct platform_device ts72xx_rtc_device = { 205 .name = "rtc-m48t86", 206 .id = -1, 207 .dev = { 208 .platform_data = &ts72xx_rtc_ops, 209 }, 210 .num_resources = 0, 211 }; 212 213 static struct resource ts72xx_wdt_resources[] = { 214 { 215 .start = TS72XX_WDT_CONTROL_PHYS_BASE, 216 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1, 217 .flags = IORESOURCE_MEM, 218 }, 219 { 220 .start = TS72XX_WDT_FEED_PHYS_BASE, 221 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1, 222 .flags = IORESOURCE_MEM, 223 }, 224 }; 225 226 static struct platform_device ts72xx_wdt_device = { 227 .name = "ts72xx-wdt", 228 .id = -1, 229 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources), 230 .resource = ts72xx_wdt_resources, 231 }; 232 233 static struct ep93xx_eth_data __initdata ts72xx_eth_data = { 234 .phy_id = 1, 235 }; 236 237 static void __init ts72xx_init_machine(void) 238 { 239 ep93xx_init_devices(); 240 ts72xx_register_flash(); 241 platform_device_register(&ts72xx_rtc_device); 242 platform_device_register(&ts72xx_wdt_device); 243 244 ep93xx_register_eth(&ts72xx_eth_data, 1); 245 } 246 247 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC") 248 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */ 249 .atag_offset = 0x100, 250 .map_io = ts72xx_map_io, 251 .init_irq = ep93xx_init_irq, 252 .handle_irq = vic_handle_irq, 253 .timer = &ep93xx_timer, 254 .init_machine = ts72xx_init_machine, 255 .restart = ep93xx_restart, 256 MACHINE_END 257