arch/arm/mach-ep93xx/ts72xx.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-ep93xx/ts72xx.c
   4  * Technologic Systems TS72xx SBC support.
   5  *
   6  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   7  */
   8
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/io.h>
  15 #include <linux/mtd/platnand.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/spi/flash.h>
  18 #include <linux/spi/mmc_spi.h>
  19 #include <linux/mmc/host.h>
  20 #include <linux/platform_data/spi-ep93xx.h>
  21 #include <linux/gpio/machine.h>
  22
  23 #include "gpio-ep93xx.h"
  24 #include "hardware.h"
  25 #include <mach/irqs.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/arch.h>
  30
  31 #include "soc.h"
  32 #include "ts72xx.h"
  33
  34 /*************************************************************************
  35  * IO map
  36  *************************************************************************/
  37 static struct map_desc ts72xx_io_desc[] __initdata = {
  38         {
  39                 .virtual        = (unsigned long)TS72XX_MODEL_VIRT_BASE,
  40                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  41                 .length         = TS72XX_MODEL_SIZE,
  42                 .type           = MT_DEVICE,
  43         }, {
  44                 .virtual        = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
  45                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  46                 .length         = TS72XX_OPTIONS_SIZE,
  47                 .type           = MT_DEVICE,
  48         }, {
  49                 .virtual        = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
  50                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  51                 .length         = TS72XX_OPTIONS2_SIZE,
  52                 .type           = MT_DEVICE,
  53         }, {
  54                 .virtual        = (unsigned long)TS72XX_CPLDVER_VIRT_BASE,
  55                 .pfn            = __phys_to_pfn(TS72XX_CPLDVER_PHYS_BASE),
  56                 .length         = TS72XX_CPLDVER_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 nand_chip *chip,
  75                                   int cmd, unsigned int ctrl)
  76 {
  77         if (ctrl & NAND_CTRL_CHANGE) {
  78                 void __iomem *addr = chip->legacy.IO_ADDR_R;
  79                 unsigned char bits;
  80
  81                 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
  82
  83                 bits = __raw_readb(addr) & ~0x07;
  84                 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
  85                 bits |= (ctrl & NAND_CLE);      /* bit 1 -> bit 1 */
  86                 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
  87
  88                 __raw_writeb(bits, addr);
  89         }
  90
  91         if (cmd != NAND_CMD_NONE)
  92                 __raw_writeb(cmd, chip->legacy.IO_ADDR_W);
  93 }
  94
  95 static int ts72xx_nand_device_ready(struct nand_chip *chip)
  96 {
  97         void __iomem *addr = chip->legacy.IO_ADDR_R;
  98
  99         addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
 100
 101         return !!(__raw_readb(addr) & 0x20);
 102 }
 103
 104 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
 105 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
 106
 107 static struct mtd_partition ts72xx_nand_parts[] = {
 108         {
 109                 .name           = "TS-BOOTROM",
 110                 .offset         = 0,
 111                 .size           = TS72XX_BOOTROM_PART_SIZE,
 112                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 113         }, {
 114                 .name           = "Linux",
 115                 .offset         = MTDPART_OFS_RETAIN,
 116                 .size           = TS72XX_REDBOOT_PART_SIZE,
 117                                 /* leave so much for last partition */
 118         }, {
 119                 .name           = "RedBoot",
 120                 .offset         = MTDPART_OFS_APPEND,
 121                 .size           = MTDPART_SIZ_FULL,
 122                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 123         },
 124 };
 125
 126 static struct platform_nand_data ts72xx_nand_data = {
 127         .chip = {
 128                 .nr_chips       = 1,
 129                 .chip_offset    = 0,
 130                 .chip_delay     = 15,
 131         },
 132         .ctrl = {
 133                 .cmd_ctrl       = ts72xx_nand_hwcontrol,
 134                 .dev_ready      = ts72xx_nand_device_ready,
 135         },
 136 };
 137
 138 static struct resource ts72xx_nand_resource[] = {
 139         {
 140                 .start          = 0,                    /* filled in later */
 141                 .end            = 0,                    /* filled in later */
 142                 .flags          = IORESOURCE_MEM,
 143         },
 144 };
 145
 146 static struct platform_device ts72xx_nand_flash = {
 147         .name                   = "gen_nand",
 148         .id                     = -1,
 149         .dev.platform_data      = &ts72xx_nand_data,
 150         .resource               = ts72xx_nand_resource,
 151         .num_resources          = ARRAY_SIZE(ts72xx_nand_resource),
 152 };
 153
 154 void __init ts72xx_register_flash(struct mtd_partition *parts, int n,
 155                                   resource_size_t start)
 156 {
 157         /*
 158          * TS7200 has NOR flash all other TS72xx board have NAND flash.
 159          */
 160         if (board_is_ts7200()) {
 161                 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
 162         } else {
 163                 ts72xx_nand_resource[0].start = start;
 164                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
 165
 166                 ts72xx_nand_data.chip.partitions = parts;
 167                 ts72xx_nand_data.chip.nr_partitions = n;
 168
 169                 platform_device_register(&ts72xx_nand_flash);
 170         }
 171 }
 172
 173 /*************************************************************************
 174  * RTC M48T86
 175  *************************************************************************/
 176 #define TS72XX_RTC_INDEX_PHYS_BASE      (EP93XX_CS1_PHYS_BASE + 0x00800000)
 177 #define TS72XX_RTC_DATA_PHYS_BASE       (EP93XX_CS1_PHYS_BASE + 0x01700000)
 178
 179 static struct resource ts72xx_rtc_resources[] = {
 180         DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
 181         DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
 182 };
 183
 184 static struct platform_device ts72xx_rtc_device = {
 185         .name           = "rtc-m48t86",
 186         .id             = -1,
 187         .resource       = ts72xx_rtc_resources,
 188         .num_resources  = ARRAY_SIZE(ts72xx_rtc_resources),
 189 };
 190
 191 /*************************************************************************
 192  * Watchdog (in CPLD)
 193  *************************************************************************/
 194 #define TS72XX_WDT_CONTROL_PHYS_BASE    (EP93XX_CS2_PHYS_BASE + 0x03800000)
 195 #define TS72XX_WDT_FEED_PHYS_BASE       (EP93XX_CS2_PHYS_BASE + 0x03c00000)
 196
 197 static struct resource ts72xx_wdt_resources[] = {
 198         DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, 0x01),
 199         DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, 0x01),
 200 };
 201
 202 static struct platform_device ts72xx_wdt_device = {
 203         .name           = "ts72xx-wdt",
 204         .id             = -1,
 205         .resource       = ts72xx_wdt_resources,
 206         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
 207 };
 208
 209 /*************************************************************************
 210  * ETH
 211  *************************************************************************/
 212 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 213         .phy_id         = 1,
 214 };
 215
 216 /*************************************************************************
 217  * SPI SD/MMC host
 218  *************************************************************************/
 219 #define BK3_EN_SDCARD_PHYS_BASE         0x12400000
 220 #define BK3_EN_SDCARD_PWR 0x0
 221 #define BK3_DIS_SDCARD_PWR 0x0C
 222 static void bk3_mmc_spi_setpower(struct device *dev, unsigned int vdd)
 223 {
 224         void __iomem *pwr_sd = ioremap(BK3_EN_SDCARD_PHYS_BASE, SZ_4K);
 225
 226         if (!pwr_sd) {
 227                 pr_err("Failed to enable SD card power!");
 228                 return;
 229         }
 230
 231         pr_debug("%s: SD card pwr %s VDD:0x%x\n", __func__,
 232                  !!vdd ? "ON" : "OFF", vdd);
 233
 234         if (!!vdd)
 235                 __raw_writeb(BK3_EN_SDCARD_PWR, pwr_sd);
 236         else
 237                 __raw_writeb(BK3_DIS_SDCARD_PWR, pwr_sd);
 238
 239         iounmap(pwr_sd);
 240 }
 241
 242 static struct mmc_spi_platform_data bk3_spi_mmc_data = {
 243         .detect_delay   = 500,
 244         .powerup_msecs  = 100,
 245         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 246         .caps           = MMC_CAP_NONREMOVABLE,
 247         .setpower       = bk3_mmc_spi_setpower,
 248 };
 249
 250 /*************************************************************************
 251  * SPI Bus - SD card access
 252  *************************************************************************/
 253 static struct spi_board_info bk3_spi_board_info[] __initdata = {
 254         {
 255                 .modalias               = "mmc_spi",
 256                 .platform_data          = &bk3_spi_mmc_data,
 257                 .max_speed_hz           = 7.4E6,
 258                 .bus_num                = 0,
 259                 .chip_select            = 0,
 260                 .mode                   = SPI_MODE_0,
 261         },
 262 };
 263
 264 /*
 265  * This is a stub -> the FGPIO[3] pin is not connected on the schematic
 266  * The all work is performed automatically by !SPI_FRAME (SFRM1) and
 267  * goes through CPLD
 268  */
 269 static struct gpiod_lookup_table bk3_spi_cs_gpio_table = {
 270         .dev_id = "spi0",
 271         .table = {
 272                 GPIO_LOOKUP("F", 3, "cs", GPIO_ACTIVE_LOW),
 273                 { },
 274         },
 275 };
 276
 277 static struct ep93xx_spi_info bk3_spi_master __initdata = {
 278         .use_dma        = 1,
 279 };
 280
 281 /*************************************************************************
 282  * TS72XX support code
 283  *************************************************************************/
 284 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 285
 286 /* Relative to EP93XX_CS1_PHYS_BASE */
 287 #define TS73XX_FPGA_LOADER_BASE         0x03c00000
 288
 289 static struct resource ts73xx_fpga_resources[] = {
 290         {
 291                 .start  = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE,
 292                 .end    = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE + 1,
 293                 .flags  = IORESOURCE_MEM,
 294         },
 295 };
 296
 297 static struct platform_device ts73xx_fpga_device = {
 298         .name   = "ts73xx-fpga-mgr",
 299         .id     = -1,
 300         .resource = ts73xx_fpga_resources,
 301         .num_resources = ARRAY_SIZE(ts73xx_fpga_resources),
 302 };
 303
 304 #endif
 305
 306 /*************************************************************************
 307  * SPI Bus
 308  *************************************************************************/
 309 static struct spi_board_info ts72xx_spi_devices[] __initdata = {
 310         {
 311                 .modalias               = "tmp122",
 312                 .max_speed_hz           = 2 * 1000 * 1000,
 313                 .bus_num                = 0,
 314                 .chip_select            = 0,
 315         },
 316 };
 317
 318 static struct gpiod_lookup_table ts72xx_spi_cs_gpio_table = {
 319         .dev_id = "spi0",
 320         .table = {
 321                 /* DIO_17 */
 322                 GPIO_LOOKUP("F", 2, "cs", GPIO_ACTIVE_LOW),
 323                 { },
 324         },
 325 };
 326
 327 static struct ep93xx_spi_info ts72xx_spi_info __initdata = {
 328         /* Intentionally left blank */
 329 };
 330
 331 static void __init ts72xx_init_machine(void)
 332 {
 333         ep93xx_init_devices();
 334         ts72xx_register_flash(ts72xx_nand_parts, ARRAY_SIZE(ts72xx_nand_parts),
 335                               is_ts9420_installed() ?
 336                               EP93XX_CS7_PHYS_BASE : EP93XX_CS6_PHYS_BASE);
 337         platform_device_register(&ts72xx_rtc_device);
 338         platform_device_register(&ts72xx_wdt_device);
 339
 340         ep93xx_register_eth(&ts72xx_eth_data, 1);
 341 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 342         if (board_is_ts7300())
 343                 platform_device_register(&ts73xx_fpga_device);
 344 #endif
 345         gpiod_add_lookup_table(&ts72xx_spi_cs_gpio_table);
 346         ep93xx_register_spi(&ts72xx_spi_info, ts72xx_spi_devices,
 347                             ARRAY_SIZE(ts72xx_spi_devices));
 348 }
 349
 350 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 351         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 352         .atag_offset    = 0x100,
 353         .map_io         = ts72xx_map_io,
 354         .init_irq       = ep93xx_init_irq,
 355         .init_time      = ep93xx_timer_init,
 356         .init_machine   = ts72xx_init_machine,
 357         .init_late      = ep93xx_init_late,
 358         .restart        = ep93xx_restart,
 359 MACHINE_END
 360
 361 /*************************************************************************
 362  * EP93xx I2S audio peripheral handling
 363  *************************************************************************/
 364 static struct resource ep93xx_i2s_resource[] = {
 365         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 366         DEFINE_RES_IRQ_NAMED(IRQ_EP93XX_SAI, "spilink i2s slave"),
 367 };
 368
 369 static struct platform_device ep93xx_i2s_device = {
 370         .name           = "ep93xx-spilink-i2s",
 371         .id             = -1,
 372         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 373         .resource       = ep93xx_i2s_resource,
 374 };
 375
 376 /*************************************************************************
 377  * BK3 support code
 378  *************************************************************************/
 379 static struct mtd_partition bk3_nand_parts[] = {
 380         {
 381                 .name           = "System",
 382                 .offset = 0x00000000,
 383                 .size           = 0x01e00000,
 384         }, {
 385                 .name           = "Data",
 386                 .offset = 0x01e00000,
 387                 .size           = 0x05f20000
 388         }, {
 389                 .name           = "RedBoot",
 390                 .offset = 0x07d20000,
 391                 .size           = 0x002e0000,
 392                 .mask_flags     = MTD_WRITEABLE,        /* force RO */
 393         },
 394 };
 395
 396 static void __init bk3_init_machine(void)
 397 {
 398         ep93xx_init_devices();
 399
 400         ts72xx_register_flash(bk3_nand_parts, ARRAY_SIZE(bk3_nand_parts),
 401                               EP93XX_CS6_PHYS_BASE);
 402
 403         ep93xx_register_eth(&ts72xx_eth_data, 1);
 404
 405         gpiod_add_lookup_table(&bk3_spi_cs_gpio_table);
 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