arch/arm/mach-ep93xx/ts72xx.c

   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/mtd/rawnand.h>
  20 #include <linux/mtd/partitions.h>
  21 #include <linux/spi/spi.h>
  22 #include <linux/spi/flash.h>
  23 #include <linux/spi/mmc_spi.h>
  24 #include <linux/mmc/host.h>
  25 #include <linux/platform_data/spi-ep93xx.h>
  26
  27 #include <mach/gpio-ep93xx.h>
  28 #include <mach/hardware.h>
  29 #include <mach/irqs.h>
  30 #include <mach/gpio-ep93xx.h>
  31
  32 #include <asm/mach-types.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/arch.h>
  35
  36 #include "soc.h"
  37 #include "ts72xx.h"
  38
  39 /*************************************************************************
  40  * IO map
  41  *************************************************************************/
  42 static struct map_desc ts72xx_io_desc[] __initdata = {
  43         {
  44                 .virtual        = (unsigned long)TS72XX_MODEL_VIRT_BASE,
  45                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  46                 .length         = TS72XX_MODEL_SIZE,
  47                 .type           = MT_DEVICE,
  48         }, {
  49                 .virtual        = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
  50                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  51                 .length         = TS72XX_OPTIONS_SIZE,
  52                 .type           = MT_DEVICE,
  53         }, {
  54                 .virtual        = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
  55                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  56                 .length         = TS72XX_OPTIONS2_SIZE,
  57                 .type           = MT_DEVICE,
  58         }, {
  59                 .virtual        = (unsigned long)TS72XX_CPLDVER_VIRT_BASE,
  60                 .pfn            = __phys_to_pfn(TS72XX_CPLDVER_PHYS_BASE),
  61                 .length         = TS72XX_CPLDVER_SIZE,
  62                 .type           = MT_DEVICE,
  63         }
  64 };
  65
  66 static void __init ts72xx_map_io(void)
  67 {
  68         ep93xx_map_io();
  69         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
  70 }
  71
  72
  73 /*************************************************************************
  74  * NAND flash
  75  *************************************************************************/
  76 #define TS72XX_NAND_CONTROL_ADDR_LINE   22      /* 0xN0400000 */
  77 #define TS72XX_NAND_BUSY_ADDR_LINE      23      /* 0xN0800000 */
  78
  79 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
  80                                   int cmd, unsigned int ctrl)
  81 {
  82         struct nand_chip *chip = mtd_to_nand(mtd);
  83
  84         if (ctrl & NAND_CTRL_CHANGE) {
  85                 void __iomem *addr = chip->IO_ADDR_R;
  86                 unsigned char bits;
  87
  88                 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
  89
  90                 bits = __raw_readb(addr) & ~0x07;
  91                 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
  92                 bits |= (ctrl & NAND_CLE);      /* bit 1 -> bit 1 */
  93                 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
  94
  95                 __raw_writeb(bits, addr);
  96         }
  97
  98         if (cmd != NAND_CMD_NONE)
  99                 __raw_writeb(cmd, chip->IO_ADDR_W);
 100 }
 101
 102 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
 103 {
 104         struct nand_chip *chip = mtd_to_nand(mtd);
 105         void __iomem *addr = chip->IO_ADDR_R;
 106
 107         addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
 108
 109         return !!(__raw_readb(addr) & 0x20);
 110 }
 111
 112 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
 113 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
 114
 115 static struct mtd_partition ts72xx_nand_parts[] = {
 116         {
 117                 .name           = "TS-BOOTROM",
 118                 .offset         = 0,
 119                 .size           = TS72XX_BOOTROM_PART_SIZE,
 120                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 121         }, {
 122                 .name           = "Linux",
 123                 .offset         = MTDPART_OFS_RETAIN,
 124                 .size           = TS72XX_REDBOOT_PART_SIZE,
 125                                 /* leave so much for last partition */
 126         }, {
 127                 .name           = "RedBoot",
 128                 .offset         = MTDPART_OFS_APPEND,
 129                 .size           = MTDPART_SIZ_FULL,
 130                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 131         },
 132 };
 133
 134 static struct platform_nand_data ts72xx_nand_data = {
 135         .chip = {
 136                 .nr_chips       = 1,
 137                 .chip_offset    = 0,
 138                 .chip_delay     = 15,
 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 void __init ts72xx_register_flash(struct mtd_partition *parts, int n,
 163                                   resource_size_t start)
 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                 ts72xx_nand_resource[0].start = start;
 172                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
 173
 174                 ts72xx_nand_data.chip.partitions = parts;
 175                 ts72xx_nand_data.chip.nr_partitions = n;
 176
 177                 platform_device_register(&ts72xx_nand_flash);
 178         }
 179 }
 180
 181 /*************************************************************************
 182  * RTC M48T86
 183  *************************************************************************/
 184 #define TS72XX_RTC_INDEX_PHYS_BASE      (EP93XX_CS1_PHYS_BASE + 0x00800000)
 185 #define TS72XX_RTC_DATA_PHYS_BASE       (EP93XX_CS1_PHYS_BASE + 0x01700000)
 186
 187 static struct resource ts72xx_rtc_resources[] = {
 188         DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
 189         DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
 190 };
 191
 192 static struct platform_device ts72xx_rtc_device = {
 193         .name           = "rtc-m48t86",
 194         .id             = -1,
 195         .resource       = ts72xx_rtc_resources,
 196         .num_resources  = ARRAY_SIZE(ts72xx_rtc_resources),
 197 };
 198
 199 /*************************************************************************
 200  * Watchdog (in CPLD)
 201  *************************************************************************/
 202 #define TS72XX_WDT_CONTROL_PHYS_BASE    (EP93XX_CS2_PHYS_BASE + 0x03800000)
 203 #define TS72XX_WDT_FEED_PHYS_BASE       (EP93XX_CS2_PHYS_BASE + 0x03c00000)
 204
 205 static struct resource ts72xx_wdt_resources[] = {
 206         DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, 0x01),
 207         DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, 0x01),
 208 };
 209
 210 static struct platform_device ts72xx_wdt_device = {
 211         .name           = "ts72xx-wdt",
 212         .id             = -1,
 213         .resource       = ts72xx_wdt_resources,
 214         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
 215 };
 216
 217 /*************************************************************************
 218  * ETH
 219  *************************************************************************/
 220 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 221         .phy_id         = 1,
 222 };
 223
 224 /*************************************************************************
 225  * SPI SD/MMC host
 226  *************************************************************************/
 227 #define BK3_EN_SDCARD_PHYS_BASE         0x12400000
 228 #define BK3_EN_SDCARD_PWR 0x0
 229 #define BK3_DIS_SDCARD_PWR 0x0C
 230 static void bk3_mmc_spi_setpower(struct device *dev, unsigned int vdd)
 231 {
 232         void __iomem *pwr_sd = ioremap(BK3_EN_SDCARD_PHYS_BASE, SZ_4K);
 233
 234         if (!pwr_sd) {
 235                 pr_err("Failed to enable SD card power!");
 236                 return;
 237         }
 238
 239         pr_debug("%s: SD card pwr %s VDD:0x%x\n", __func__,
 240                  !!vdd ? "ON" : "OFF", vdd);
 241
 242         if (!!vdd)
 243                 __raw_writeb(BK3_EN_SDCARD_PWR, pwr_sd);
 244         else
 245                 __raw_writeb(BK3_DIS_SDCARD_PWR, pwr_sd);
 246
 247         iounmap(pwr_sd);
 248 }
 249
 250 static struct mmc_spi_platform_data bk3_spi_mmc_data = {
 251         .detect_delay   = 500,
 252         .powerup_msecs  = 100,
 253         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 254         .caps           = MMC_CAP_NONREMOVABLE,
 255         .setpower       = bk3_mmc_spi_setpower,
 256 };
 257
 258 /*************************************************************************
 259  * SPI Bus - SD card access
 260  *************************************************************************/
 261 static struct spi_board_info bk3_spi_board_info[] __initdata = {
 262         {
 263                 .modalias               = "mmc_spi",
 264                 .platform_data          = &bk3_spi_mmc_data,
 265                 .max_speed_hz           = 7.4E6,
 266                 .bus_num                = 0,
 267                 .chip_select            = 0,
 268                 .mode                   = SPI_MODE_0,
 269         },
 270 };
 271
 272 /*
 273  * This is a stub -> the FGPIO[3] pin is not connected on the schematic
 274  * The all work is performed automatically by !SPI_FRAME (SFRM1) and
 275  * goes through CPLD
 276  */
 277 static int bk3_spi_chipselects[] __initdata = {
 278         EP93XX_GPIO_LINE_F(3),
 279 };
 280
 281 static struct ep93xx_spi_info bk3_spi_master __initdata = {
 282         .chipselect     = bk3_spi_chipselects,
 283         .num_chipselect = ARRAY_SIZE(bk3_spi_chipselects),
 284         .use_dma        = 1,
 285 };
 286
 287 /*************************************************************************
 288  * TS72XX support code
 289  *************************************************************************/
 290 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 291
 292 /* Relative to EP93XX_CS1_PHYS_BASE */
 293 #define TS73XX_FPGA_LOADER_BASE         0x03c00000
 294
 295 static struct resource ts73xx_fpga_resources[] = {
 296         {
 297                 .start  = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE,
 298                 .end    = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE + 1,
 299                 .flags  = IORESOURCE_MEM,
 300         },
 301 };
 302
 303 static struct platform_device ts73xx_fpga_device = {
 304         .name   = "ts73xx-fpga-mgr",
 305         .id     = -1,
 306         .resource = ts73xx_fpga_resources,
 307         .num_resources = ARRAY_SIZE(ts73xx_fpga_resources),
 308 };
 309
 310 #endif
 311
 312 /*************************************************************************
 313  * SPI Bus
 314  *************************************************************************/
 315 static struct spi_board_info ts72xx_spi_devices[] __initdata = {
 316         {
 317                 .modalias               = "tmp122",
 318                 .max_speed_hz           = 2 * 1000 * 1000,
 319                 .bus_num                = 0,
 320                 .chip_select            = 0,
 321         },
 322 };
 323
 324 static int ts72xx_spi_chipselects[] __initdata = {
 325         EP93XX_GPIO_LINE_F(2),          /* DIO_17 */
 326 };
 327
 328 static struct ep93xx_spi_info ts72xx_spi_info __initdata = {
 329         .chipselect     = ts72xx_spi_chipselects,
 330         .num_chipselect = ARRAY_SIZE(ts72xx_spi_chipselects),
 331 };
 332
 333 static void __init ts72xx_init_machine(void)
 334 {
 335         ep93xx_init_devices();
 336         ts72xx_register_flash(ts72xx_nand_parts, ARRAY_SIZE(ts72xx_nand_parts),
 337                               is_ts9420_installed() ?
 338                               EP93XX_CS7_PHYS_BASE : EP93XX_CS6_PHYS_BASE);
 339         platform_device_register(&ts72xx_rtc_device);
 340         platform_device_register(&ts72xx_wdt_device);
 341
 342         ep93xx_register_eth(&ts72xx_eth_data, 1);
 343 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 344         if (board_is_ts7300())
 345                 platform_device_register(&ts73xx_fpga_device);
 346 #endif
 347         ep93xx_register_spi(&ts72xx_spi_info, ts72xx_spi_devices,
 348                             ARRAY_SIZE(ts72xx_spi_devices));
 349 }
 350
 351 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 352         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 353         .atag_offset    = 0x100,
 354         .map_io         = ts72xx_map_io,
 355         .init_irq       = ep93xx_init_irq,
 356         .init_time      = ep93xx_timer_init,
 357         .init_machine   = ts72xx_init_machine,
 358         .init_late      = ep93xx_init_late,
 359         .restart        = ep93xx_restart,
 360 MACHINE_END
 361
 362 /*************************************************************************
 363  * EP93xx I2S audio peripheral handling
 364  *************************************************************************/
 365 static struct resource ep93xx_i2s_resource[] = {
 366         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 367         DEFINE_RES_IRQ_NAMED(IRQ_EP93XX_SAI, "spilink i2s slave"),
 368 };
 369
 370 static struct platform_device ep93xx_i2s_device = {
 371         .name           = "ep93xx-spilink-i2s",
 372         .id             = -1,
 373         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 374         .resource       = ep93xx_i2s_resource,
 375 };
 376
 377 /*************************************************************************
 378  * BK3 support code
 379  *************************************************************************/
 380 static struct mtd_partition bk3_nand_parts[] = {
 381         {
 382                 .name           = "System",
 383                 .offset = 0x00000000,
 384                 .size           = 0x01e00000,
 385         }, {
 386                 .name           = "Data",
 387                 .offset = 0x01e00000,
 388                 .size           = 0x05f20000
 389         }, {
 390                 .name           = "RedBoot",
 391                 .offset = 0x07d20000,
 392                 .size           = 0x002e0000,
 393                 .mask_flags     = MTD_WRITEABLE,        /* force RO */
 394         },
 395 };
 396
 397 static void __init bk3_init_machine(void)
 398 {
 399         ep93xx_init_devices();
 400
 401         ts72xx_register_flash(bk3_nand_parts, ARRAY_SIZE(bk3_nand_parts),
 402                               EP93XX_CS6_PHYS_BASE);
 403
 404         ep93xx_register_eth(&ts72xx_eth_data, 1);
 405
 406         ep93xx_register_spi(&bk3_spi_master, bk3_spi_board_info,
 407                             ARRAY_SIZE(bk3_spi_board_info));
 408
 409         /* Configure ep93xx's I2S to use AC97 pins */
 410         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 411         platform_device_register(&ep93xx_i2s_device);
 412 }
 413
 414 MACHINE_START(BK3, "Liebherr controller BK3.1")
 415         /* Maintainer: Lukasz Majewski <lukma@denx.de> */
 416         .atag_offset    = 0x100,
 417         .map_io         = ts72xx_map_io,
 418         .init_irq       = ep93xx_init_irq,
 419         .init_time      = ep93xx_timer_init,
 420         .init_machine   = bk3_init_machine,
 421         .init_late      = ep93xx_init_late,
 422         .restart        = ep93xx_restart,
 423 MACHINE_END