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 32 static struct map_desc ts72xx_io_desc[] __initdata = { 33 { 34 .virtual = 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 = 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 = 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 = 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 = 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 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL }; 108 109 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K) 110 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M) 111 112 static struct mtd_partition ts72xx_nand_parts[] = { 113 { 114 .name = "TS-BOOTROM", 115 .offset = 0, 116 .size = TS72XX_BOOTROM_PART_SIZE, 117 .mask_flags = MTD_WRITEABLE, /* force read-only */ 118 }, { 119 .name = "Linux", 120 .offset = MTDPART_OFS_RETAIN, 121 .size = TS72XX_REDBOOT_PART_SIZE, 122 /* leave so much for last partition */ 123 }, { 124 .name = "RedBoot", 125 .offset = MTDPART_OFS_APPEND, 126 .size = MTDPART_SIZ_FULL, 127 .mask_flags = MTD_WRITEABLE, /* force read-only */ 128 }, 129 }; 130 131 static struct platform_nand_data ts72xx_nand_data = { 132 .chip = { 133 .nr_chips = 1, 134 .chip_offset = 0, 135 .chip_delay = 15, 136 .part_probe_types = ts72xx_nand_part_probes, 137 .partitions = ts72xx_nand_parts, 138 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts), 139 }, 140 .ctrl = { 141 .cmd_ctrl = ts72xx_nand_hwcontrol, 142 .dev_ready = ts72xx_nand_device_ready, 143 }, 144 }; 145 146 static struct resource ts72xx_nand_resource[] = { 147 { 148 .start = 0, /* filled in later */ 149 .end = 0, /* filled in later */ 150 .flags = IORESOURCE_MEM, 151 }, 152 }; 153 154 static struct platform_device ts72xx_nand_flash = { 155 .name = "gen_nand", 156 .id = -1, 157 .dev.platform_data = &ts72xx_nand_data, 158 .resource = ts72xx_nand_resource, 159 .num_resources = ARRAY_SIZE(ts72xx_nand_resource), 160 }; 161 162 163 static void __init ts72xx_register_flash(void) 164 { 165 /* 166 * TS7200 has NOR flash all other TS72xx board have NAND flash. 167 */ 168 if (board_is_ts7200()) { 169 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M); 170 } else { 171 resource_size_t start; 172 173 if (is_ts9420_installed()) 174 start = EP93XX_CS7_PHYS_BASE; 175 else 176 start = EP93XX_CS6_PHYS_BASE; 177 178 ts72xx_nand_resource[0].start = start; 179 ts72xx_nand_resource[0].end = start + SZ_16M - 1; 180 181 platform_device_register(&ts72xx_nand_flash); 182 } 183 } 184 185 186 static unsigned char ts72xx_rtc_readbyte(unsigned long addr) 187 { 188 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 189 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE); 190 } 191 192 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr) 193 { 194 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE); 195 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE); 196 } 197 198 static struct m48t86_ops ts72xx_rtc_ops = { 199 .readbyte = ts72xx_rtc_readbyte, 200 .writebyte = ts72xx_rtc_writebyte, 201 }; 202 203 static struct platform_device ts72xx_rtc_device = { 204 .name = "rtc-m48t86", 205 .id = -1, 206 .dev = { 207 .platform_data = &ts72xx_rtc_ops, 208 }, 209 .num_resources = 0, 210 }; 211 212 static struct resource ts72xx_wdt_resources[] = { 213 { 214 .start = TS72XX_WDT_CONTROL_PHYS_BASE, 215 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1, 216 .flags = IORESOURCE_MEM, 217 }, 218 { 219 .start = TS72XX_WDT_FEED_PHYS_BASE, 220 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1, 221 .flags = IORESOURCE_MEM, 222 }, 223 }; 224 225 static struct platform_device ts72xx_wdt_device = { 226 .name = "ts72xx-wdt", 227 .id = -1, 228 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources), 229 .resource = ts72xx_wdt_resources, 230 }; 231 232 static struct ep93xx_eth_data __initdata ts72xx_eth_data = { 233 .phy_id = 1, 234 }; 235 236 static void __init ts72xx_init_machine(void) 237 { 238 ep93xx_init_devices(); 239 ts72xx_register_flash(); 240 platform_device_register(&ts72xx_rtc_device); 241 platform_device_register(&ts72xx_wdt_device); 242 243 ep93xx_register_eth(&ts72xx_eth_data, 1); 244 } 245 246 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC") 247 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */ 248 .atag_offset = 0x100, 249 .map_io = ts72xx_map_io, 250 .init_irq = ep93xx_init_irq, 251 .handle_irq = vic_handle_irq, 252 .timer = &ep93xx_timer, 253 .init_machine = ts72xx_init_machine, 254 .restart = ep93xx_restart, 255 MACHINE_END 256