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
  26 #include <asm/mach-types.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/mach/arch.h>
  29
  30 #include "soc.h"
  31 #include "ts72xx.h"
  32
  33 /*************************************************************************
  34  * IO map
  35  *************************************************************************/
  36 static struct map_desc ts72xx_io_desc[] __initdata = {
  37         {
  38                 .virtual        = (unsigned long)TS72XX_MODEL_VIRT_BASE,
  39                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  40                 .length         = TS72XX_MODEL_SIZE,
  41                 .type           = MT_DEVICE,
  42         }, {
  43                 .virtual        = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
  44                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  45                 .length         = TS72XX_OPTIONS_SIZE,
  46                 .type           = MT_DEVICE,
  47         }, {
  48                 .virtual        = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
  49                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  50                 .length         = TS72XX_OPTIONS2_SIZE,
  51                 .type           = MT_DEVICE,
  52         }, {
  53                 .virtual        = (unsigned long)TS72XX_CPLDVER_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(TS72XX_CPLDVER_PHYS_BASE),
  55                 .length         = TS72XX_CPLDVER_SIZE,
  56                 .type           = MT_DEVICE,
  57         }
  58 };
  59
  60 static void __init ts72xx_map_io(void)
  61 {
  62         ep93xx_map_io();
  63         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
  64 }
  65
  66
  67 /*************************************************************************
  68  * NAND flash
  69  *************************************************************************/
  70 #define TS72XX_NAND_CONTROL_ADDR_LINE   22      /* 0xN0400000 */
  71 #define TS72XX_NAND_BUSY_ADDR_LINE      23      /* 0xN0800000 */
  72
  73 static void ts72xx_nand_hwcontrol(struct nand_chip *chip,
  74                                   int cmd, unsigned int ctrl)
  75 {
  76         if (ctrl & NAND_CTRL_CHANGE) {
  77                 void __iomem *addr = chip->legacy.IO_ADDR_R;
  78                 unsigned char bits;
  79
  80                 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
  81
  82                 bits = __raw_readb(addr) & ~0x07;
  83                 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
  84                 bits |= (ctrl & NAND_CLE);      /* bit 1 -> bit 1 */
  85                 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
  86
  87                 __raw_writeb(bits, addr);
  88         }
  89
  90         if (cmd != NAND_CMD_NONE)
  91                 __raw_writeb(cmd, chip->legacy.IO_ADDR_W);
  92 }
  93
  94 static int ts72xx_nand_device_ready(struct nand_chip *chip)
  95 {
  96         void __iomem *addr = chip->legacy.IO_ADDR_R;
  97
  98         addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
  99
 100         return !!(__raw_readb(addr) & 0x20);
 101 }
 102
 103 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
 104 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
 105
 106 static struct mtd_partition ts72xx_nand_parts[] = {
 107         {
 108                 .name           = "TS-BOOTROM",
 109                 .offset         = 0,
 110                 .size           = TS72XX_BOOTROM_PART_SIZE,
 111                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 112         }, {
 113                 .name           = "Linux",
 114                 .offset         = MTDPART_OFS_RETAIN,
 115                 .size           = TS72XX_REDBOOT_PART_SIZE,
 116                                 /* leave so much for last partition */
 117         }, {
 118                 .name           = "RedBoot",
 119                 .offset         = MTDPART_OFS_APPEND,
 120                 .size           = MTDPART_SIZ_FULL,
 121                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 122         },
 123 };
 124
 125 static struct platform_nand_data ts72xx_nand_data = {
 126         .chip = {
 127                 .nr_chips       = 1,
 128                 .chip_offset    = 0,
 129                 .chip_delay     = 15,
 130         },
 131         .ctrl = {
 132                 .cmd_ctrl       = ts72xx_nand_hwcontrol,
 133                 .dev_ready      = ts72xx_nand_device_ready,
 134         },
 135 };
 136
 137 static struct resource ts72xx_nand_resource[] = {
 138         {
 139                 .start          = 0,                    /* filled in later */
 140                 .end            = 0,                    /* filled in later */
 141                 .flags          = IORESOURCE_MEM,
 142         },
 143 };
 144
 145 static struct platform_device ts72xx_nand_flash = {
 146         .name                   = "gen_nand",
 147         .id                     = -1,
 148         .dev.platform_data      = &ts72xx_nand_data,
 149         .resource               = ts72xx_nand_resource,
 150         .num_resources          = ARRAY_SIZE(ts72xx_nand_resource),
 151 };
 152
 153 static void __init ts72xx_register_flash(struct mtd_partition *parts, int n,
 154                                   resource_size_t start)
 155 {
 156         /*
 157          * TS7200 has NOR flash all other TS72xx board have NAND flash.
 158          */
 159         if (board_is_ts7200()) {
 160                 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
 161         } else {
 162                 ts72xx_nand_resource[0].start = start;
 163                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
 164
 165                 ts72xx_nand_data.chip.partitions = parts;
 166                 ts72xx_nand_data.chip.nr_partitions = n;
 167
 168                 platform_device_register(&ts72xx_nand_flash);
 169         }
 170 }
 171
 172 /*************************************************************************
 173  * RTC M48T86
 174  *************************************************************************/
 175 #define TS72XX_RTC_INDEX_PHYS_BASE      (EP93XX_CS1_PHYS_BASE + 0x00800000)
 176 #define TS72XX_RTC_DATA_PHYS_BASE       (EP93XX_CS1_PHYS_BASE + 0x01700000)
 177
 178 static struct resource ts72xx_rtc_resources[] = {
 179         DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
 180         DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
 181 };
 182
 183 static struct platform_device ts72xx_rtc_device = {
 184         .name           = "rtc-m48t86",
 185         .id             = -1,
 186         .resource       = ts72xx_rtc_resources,
 187         .num_resources  = ARRAY_SIZE(ts72xx_rtc_resources),
 188 };
 189
 190 /*************************************************************************
 191  * Watchdog (in CPLD)
 192  *************************************************************************/
 193 #define TS72XX_WDT_CONTROL_PHYS_BASE    (EP93XX_CS2_PHYS_BASE + 0x03800000)
 194 #define TS72XX_WDT_FEED_PHYS_BASE       (EP93XX_CS2_PHYS_BASE + 0x03c00000)
 195
 196 static struct resource ts72xx_wdt_resources[] = {
 197         DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, 0x01),
 198         DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, 0x01),
 199 };
 200
 201 static struct platform_device ts72xx_wdt_device = {
 202         .name           = "ts72xx-wdt",
 203         .id             = -1,
 204         .resource       = ts72xx_wdt_resources,
 205         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
 206 };
 207
 208 /*************************************************************************
 209  * ETH
 210  *************************************************************************/
 211 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 212         .phy_id         = 1,
 213 };
 214
 215 /*************************************************************************
 216  * SPI SD/MMC host
 217  *************************************************************************/
 218 #define BK3_EN_SDCARD_PHYS_BASE         0x12400000
 219 #define BK3_EN_SDCARD_PWR 0x0
 220 #define BK3_DIS_SDCARD_PWR 0x0C
 221 static void bk3_mmc_spi_setpower(struct device *dev, unsigned int vdd)
 222 {
 223         void __iomem *pwr_sd = ioremap(BK3_EN_SDCARD_PHYS_BASE, SZ_4K);
 224
 225         if (!pwr_sd) {
 226                 pr_err("Failed to enable SD card power!");
 227                 return;
 228         }
 229
 230         pr_debug("%s: SD card pwr %s VDD:0x%x\n", __func__,
 231                  !!vdd ? "ON" : "OFF", vdd);
 232
 233         if (!!vdd)
 234                 __raw_writeb(BK3_EN_SDCARD_PWR, pwr_sd);
 235         else
 236                 __raw_writeb(BK3_DIS_SDCARD_PWR, pwr_sd);
 237
 238         iounmap(pwr_sd);
 239 }
 240
 241 static struct mmc_spi_platform_data bk3_spi_mmc_data = {
 242         .detect_delay   = 500,
 243         .powerup_msecs  = 100,
 244         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 245         .caps           = MMC_CAP_NONREMOVABLE,
 246         .setpower       = bk3_mmc_spi_setpower,
 247 };
 248
 249 /*************************************************************************
 250  * SPI Bus - SD card access
 251  *************************************************************************/
 252 static struct spi_board_info bk3_spi_board_info[] __initdata = {
 253         {
 254                 .modalias               = "mmc_spi",
 255                 .platform_data          = &bk3_spi_mmc_data,
 256                 .max_speed_hz           = 7.4E6,
 257                 .bus_num                = 0,
 258                 .chip_select            = 0,
 259                 .mode                   = SPI_MODE_0,
 260         },
 261 };
 262
 263 /*
 264  * This is a stub -> the FGPIO[3] pin is not connected on the schematic
 265  * The all work is performed automatically by !SPI_FRAME (SFRM1) and
 266  * goes through CPLD
 267  */
 268 static struct gpiod_lookup_table bk3_spi_cs_gpio_table = {
 269         .dev_id = "spi0",
 270         .table = {
 271                 GPIO_LOOKUP("F", 3, "cs", GPIO_ACTIVE_LOW),
 272                 { },
 273         },
 274 };
 275
 276 static struct ep93xx_spi_info bk3_spi_master __initdata = {
 277         .use_dma        = 1,
 278 };
 279
 280 /*************************************************************************
 281  * TS72XX support code
 282  *************************************************************************/
 283 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 284
 285 /* Relative to EP93XX_CS1_PHYS_BASE */
 286 #define TS73XX_FPGA_LOADER_BASE         0x03c00000
 287
 288 static struct resource ts73xx_fpga_resources[] = {
 289         {
 290                 .start  = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE,
 291                 .end    = EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE + 1,
 292                 .flags  = IORESOURCE_MEM,
 293         },
 294 };
 295
 296 static struct platform_device ts73xx_fpga_device = {
 297         .name   = "ts73xx-fpga-mgr",
 298         .id     = -1,
 299         .resource = ts73xx_fpga_resources,
 300         .num_resources = ARRAY_SIZE(ts73xx_fpga_resources),
 301 };
 302
 303 #endif
 304
 305 /*************************************************************************
 306  * SPI Bus
 307  *************************************************************************/
 308 static struct spi_board_info ts72xx_spi_devices[] __initdata = {
 309         {
 310                 .modalias               = "tmp122",
 311                 .max_speed_hz           = 2 * 1000 * 1000,
 312                 .bus_num                = 0,
 313                 .chip_select            = 0,
 314         },
 315 };
 316
 317 static struct gpiod_lookup_table ts72xx_spi_cs_gpio_table = {
 318         .dev_id = "spi0",
 319         .table = {
 320                 /* DIO_17 */
 321                 GPIO_LOOKUP("F", 2, "cs", GPIO_ACTIVE_LOW),
 322                 { },
 323         },
 324 };
 325
 326 static struct ep93xx_spi_info ts72xx_spi_info __initdata = {
 327         /* Intentionally left blank */
 328 };
 329
 330 static void __init ts72xx_init_machine(void)
 331 {
 332         ep93xx_init_devices();
 333         ts72xx_register_flash(ts72xx_nand_parts, ARRAY_SIZE(ts72xx_nand_parts),
 334                               is_ts9420_installed() ?
 335                               EP93XX_CS7_PHYS_BASE : EP93XX_CS6_PHYS_BASE);
 336         platform_device_register(&ts72xx_rtc_device);
 337         platform_device_register(&ts72xx_wdt_device);
 338
 339         ep93xx_register_eth(&ts72xx_eth_data, 1);
 340 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 341         if (board_is_ts7300())
 342                 platform_device_register(&ts73xx_fpga_device);
 343 #endif
 344         gpiod_add_lookup_table(&ts72xx_spi_cs_gpio_table);
 345         ep93xx_register_spi(&ts72xx_spi_info, ts72xx_spi_devices,
 346                             ARRAY_SIZE(ts72xx_spi_devices));
 347 }
 348
 349 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 350         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 351         .atag_offset    = 0x100,
 352         .nr_irqs        = NR_EP93XX_IRQS,
 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         .restart        = ep93xx_restart,
 358 MACHINE_END
 359
 360 /*************************************************************************
 361  * EP93xx I2S audio peripheral handling
 362  *************************************************************************/
 363 static struct resource ep93xx_i2s_resource[] = {
 364         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 365         DEFINE_RES_IRQ_NAMED(IRQ_EP93XX_SAI, "spilink i2s slave"),
 366 };
 367
 368 static struct platform_device ep93xx_i2s_device = {
 369         .name           = "ep93xx-spilink-i2s",
 370         .id             = -1,
 371         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 372         .resource       = ep93xx_i2s_resource,
 373 };
 374
 375 /*************************************************************************
 376  * BK3 support code
 377  *************************************************************************/
 378 static struct mtd_partition bk3_nand_parts[] = {
 379         {
 380                 .name           = "System",
 381                 .offset = 0x00000000,
 382                 .size           = 0x01e00000,
 383         }, {
 384                 .name           = "Data",
 385                 .offset = 0x01e00000,
 386                 .size           = 0x05f20000
 387         }, {
 388                 .name           = "RedBoot",
 389                 .offset = 0x07d20000,
 390                 .size           = 0x002e0000,
 391                 .mask_flags     = MTD_WRITEABLE,        /* force RO */
 392         },
 393 };
 394
 395 static void __init bk3_init_machine(void)
 396 {
 397         ep93xx_init_devices();
 398
 399         ts72xx_register_flash(bk3_nand_parts, ARRAY_SIZE(bk3_nand_parts),
 400                               EP93XX_CS6_PHYS_BASE);
 401
 402         ep93xx_register_eth(&ts72xx_eth_data, 1);
 403
 404         gpiod_add_lookup_table(&bk3_spi_cs_gpio_table);
 405         ep93xx_register_spi(&bk3_spi_master, bk3_spi_board_info,
 406                             ARRAY_SIZE(bk3_spi_board_info));
 407
 408         /* Configure ep93xx's I2S to use AC97 pins */
 409         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 410         platform_device_register(&ep93xx_i2s_device);
 411 }
 412
 413 MACHINE_START(BK3, "Liebherr controller BK3.1")
 414         /* Maintainer: Lukasz Majewski <lukma@denx.de> */
 415         .atag_offset    = 0x100,
 416         .nr_irqs        = NR_EP93XX_IRQS,
 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         .restart        = ep93xx_restart,
 422 MACHINE_END