arch/arm/mach-s3c/mach-gta02.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   4 //
   5 // Copyright (C) 2006-2009 by Openmoko, Inc.
   6 // Authors: Harald Welte <laforge@openmoko.org>
   7 //          Andy Green <andy@openmoko.org>
   8 //          Werner Almesberger <werner@openmoko.org>
   9 // All rights reserved.
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/delay.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/gpio/machine.h>
  19 #include <linux/gpio.h>
  20 #include <linux/gpio_keys.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/serial_core.h>
  24 #include <linux/serial_s3c.h>
  25 #include <linux/input.h>
  26 #include <linux/io.h>
  27 #include <linux/i2c.h>
  28
  29 #include <linux/mmc/host.h>
  30
  31 #include <linux/mfd/pcf50633/adc.h>
  32 #include <linux/mfd/pcf50633/backlight.h>
  33 #include <linux/mfd/pcf50633/core.h>
  34 #include <linux/mfd/pcf50633/gpio.h>
  35 #include <linux/mfd/pcf50633/mbc.h>
  36 #include <linux/mfd/pcf50633/pmic.h>
  37
  38 #include <linux/mtd/mtd.h>
  39 #include <linux/mtd/rawnand.h>
  40 #include <linux/mtd/nand-ecc-sw-hamming.h>
  41 #include <linux/mtd/partitions.h>
  42 #include <linux/mtd/physmap.h>
  43
  44 #include <linux/regulator/machine.h>
  45
  46 #include <linux/spi/spi.h>
  47 #include <linux/spi/s3c24xx.h>
  48
  49 #include <asm/irq.h>
  50 #include <asm/mach-types.h>
  51 #include <asm/mach/arch.h>
  52 #include <asm/mach/map.h>
  53 #include <asm/mach/irq.h>
  54
  55 #include <linux/platform_data/i2c-s3c2410.h>
  56 #include <linux/platform_data/mtd-nand-s3c2410.h>
  57 #include <linux/platform_data/touchscreen-s3c2410.h>
  58 #include <linux/platform_data/usb-ohci-s3c2410.h>
  59 #include <linux/platform_data/usb-s3c2410_udc.h>
  60 #include <linux/platform_data/fb-s3c2410.h>
  61
  62 #include "regs-gpio.h"
  63 #include "regs-irq.h"
  64 #include "gpio-samsung.h"
  65
  66 #include "cpu.h"
  67 #include "devs.h"
  68 #include "gpio-cfg.h"
  69 #include "pm.h"
  70
  71 #include "s3c24xx.h"
  72 #include "gta02.h"
  73
  74 static struct pcf50633 *gta02_pcf;
  75
  76 /*
  77  * This gets called frequently when we paniced.
  78  */
  79
  80 static long gta02_panic_blink(int state)
  81 {
  82         char led;
  83
  84         led = (state) ? 1 : 0;
  85         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
  86
  87         return 0;
  88 }
  89
  90
  91 static struct map_desc gta02_iodesc[] __initdata = {
  92         {
  93                 .virtual        = 0xe0000000,
  94                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
  95                 .length         = SZ_1M,
  96                 .type           = MT_DEVICE
  97         },
  98 };
  99
 100 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 101 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 102 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 103
 104 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 105         [0] = {
 106                 .hwport         = 0,
 107                 .flags          = 0,
 108                 .ucon           = UCON,
 109                 .ulcon          = ULCON,
 110                 .ufcon          = UFCON,
 111         },
 112         [1] = {
 113                 .hwport         = 1,
 114                 .flags          = 0,
 115                 .ucon           = UCON,
 116                 .ulcon          = ULCON,
 117                 .ufcon          = UFCON,
 118         },
 119         [2] = {
 120                 .hwport         = 2,
 121                 .flags          = 0,
 122                 .ucon           = UCON,
 123                 .ulcon          = ULCON,
 124                 .ufcon          = UFCON,
 125         },
 126 };
 127
 128 #ifdef CONFIG_CHARGER_PCF50633
 129 /*
 130  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 131  * We use this to recognize that we can pull 1A from the USB socket.
 132  *
 133  * These constants are the measured pcf50633 ADC levels with the 1A
 134  * charger / 48K resistor, and with no pulldown resistor.
 135  */
 136
 137 #define ADC_NOM_CHG_DETECT_1A 6
 138 #define ADC_NOM_CHG_DETECT_USB 43
 139
 140 #ifdef CONFIG_PCF50633_ADC
 141 static void
 142 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 143 {
 144         int  ma;
 145
 146         /* Interpret charger type */
 147         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 148
 149                 /*
 150                  * Sanity - stop GPO driving out now that we have a 1A charger
 151                  * GPO controls USB Host power generation on GTA02
 152                  */
 153                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 154
 155                 ma = 1000;
 156         } else
 157                 ma = 100;
 158
 159         pcf50633_mbc_usb_curlim_set(pcf, ma);
 160 }
 161 #endif
 162
 163 static struct delayed_work gta02_charger_work;
 164 static int gta02_usb_vbus_draw;
 165
 166 static void gta02_charger_worker(struct work_struct *work)
 167 {
 168         if (gta02_usb_vbus_draw) {
 169                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 170                 return;
 171         }
 172
 173 #ifdef CONFIG_PCF50633_ADC
 174         pcf50633_adc_async_read(gta02_pcf,
 175                                 PCF50633_ADCC1_MUX_ADCIN1,
 176                                 PCF50633_ADCC1_AVERAGE_16,
 177                                 gta02_configure_pmu_for_charger,
 178                                 NULL);
 179 #else
 180         /*
 181          * If the PCF50633 ADC is disabled we fallback to a
 182          * 100mA limit for safety.
 183          */
 184         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 185 #endif
 186 }
 187
 188 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 189
 190 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 191 {
 192         if (irq == PCF50633_IRQ_USBINS) {
 193                 schedule_delayed_work(&gta02_charger_work,
 194                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 195
 196                 return;
 197         }
 198
 199         if (irq == PCF50633_IRQ_USBREM) {
 200                 cancel_delayed_work_sync(&gta02_charger_work);
 201                 gta02_usb_vbus_draw = 0;
 202         }
 203 }
 204
 205 static void gta02_udc_vbus_draw(unsigned int ma)
 206 {
 207         if (!gta02_pcf)
 208                 return;
 209
 210         gta02_usb_vbus_draw = ma;
 211
 212         schedule_delayed_work(&gta02_charger_work,
 213                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 214 }
 215 #else /* !CONFIG_CHARGER_PCF50633 */
 216 #define gta02_pmu_event_callback        NULL
 217 #define gta02_udc_vbus_draw             NULL
 218 #endif
 219
 220 static char *gta02_batteries[] = {
 221         "battery",
 222 };
 223
 224 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 225         .default_brightness = 0x3f,
 226         .default_brightness_limit = 0,
 227         .ramp_time = 5,
 228 };
 229
 230 static struct pcf50633_platform_data gta02_pcf_pdata = {
 231         .resumers = {
 232                 [0] =   PCF50633_INT1_USBINS |
 233                         PCF50633_INT1_USBREM |
 234                         PCF50633_INT1_ALARM,
 235                 [1] =   PCF50633_INT2_ONKEYF,
 236                 [2] =   PCF50633_INT3_ONKEY1S,
 237                 [3] =   PCF50633_INT4_LOWSYS |
 238                         PCF50633_INT4_LOWBAT |
 239                         PCF50633_INT4_HIGHTMP,
 240         },
 241
 242         .batteries = gta02_batteries,
 243         .num_batteries = ARRAY_SIZE(gta02_batteries),
 244
 245         .charger_reference_current_ma = 1000,
 246
 247         .backlight_data = &gta02_backlight_data,
 248
 249         .reg_init_data = {
 250                 [PCF50633_REGULATOR_AUTO] = {
 251                         .constraints = {
 252                                 .min_uV = 3300000,
 253                                 .max_uV = 3300000,
 254                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 255                                 .always_on = 1,
 256                                 .apply_uV = 1,
 257                         },
 258                 },
 259                 [PCF50633_REGULATOR_DOWN1] = {
 260                         .constraints = {
 261                                 .min_uV = 1300000,
 262                                 .max_uV = 1600000,
 263                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 264                                 .always_on = 1,
 265                                 .apply_uV = 1,
 266                         },
 267                 },
 268                 [PCF50633_REGULATOR_DOWN2] = {
 269                         .constraints = {
 270                                 .min_uV = 1800000,
 271                                 .max_uV = 1800000,
 272                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 273                                 .apply_uV = 1,
 274                                 .always_on = 1,
 275                         },
 276                 },
 277                 [PCF50633_REGULATOR_HCLDO] = {
 278                         .constraints = {
 279                                 .min_uV = 2000000,
 280                                 .max_uV = 3300000,
 281                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 282                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 283                                                 REGULATOR_CHANGE_STATUS,
 284                         },
 285                 },
 286                 [PCF50633_REGULATOR_LDO1] = {
 287                         .constraints = {
 288                                 .min_uV = 3300000,
 289                                 .max_uV = 3300000,
 290                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 291                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 292                                 .apply_uV = 1,
 293                         },
 294                 },
 295                 [PCF50633_REGULATOR_LDO2] = {
 296                         .constraints = {
 297                                 .min_uV = 3300000,
 298                                 .max_uV = 3300000,
 299                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 300                                 .apply_uV = 1,
 301                         },
 302                 },
 303                 [PCF50633_REGULATOR_LDO3] = {
 304                         .constraints = {
 305                                 .min_uV = 3000000,
 306                                 .max_uV = 3000000,
 307                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 308                                 .apply_uV = 1,
 309                         },
 310                 },
 311                 [PCF50633_REGULATOR_LDO4] = {
 312                         .constraints = {
 313                                 .min_uV = 3200000,
 314                                 .max_uV = 3200000,
 315                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 316                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 317                                 .apply_uV = 1,
 318                         },
 319                 },
 320                 [PCF50633_REGULATOR_LDO5] = {
 321                         .constraints = {
 322                                 .min_uV = 3000000,
 323                                 .max_uV = 3000000,
 324                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 325                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 326                                 .apply_uV = 1,
 327                         },
 328                 },
 329                 [PCF50633_REGULATOR_LDO6] = {
 330                         .constraints = {
 331                                 .min_uV = 3000000,
 332                                 .max_uV = 3000000,
 333                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 334                         },
 335                 },
 336                 [PCF50633_REGULATOR_MEMLDO] = {
 337                         .constraints = {
 338                                 .min_uV = 1800000,
 339                                 .max_uV = 1800000,
 340                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 341                         },
 342                 },
 343
 344         },
 345         .mbc_event_callback = gta02_pmu_event_callback,
 346 };
 347
 348
 349 /* NOR Flash. */
 350
 351 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 352 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 353
 354 static struct physmap_flash_data gta02_nor_flash_data = {
 355         .width          = 2,
 356 };
 357
 358 static struct resource gta02_nor_flash_resource =
 359         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 360
 361 static struct platform_device gta02_nor_flash = {
 362         .name           = "physmap-flash",
 363         .id             = 0,
 364         .dev            = {
 365                 .platform_data  = &gta02_nor_flash_data,
 366         },
 367         .resource       = &gta02_nor_flash_resource,
 368         .num_resources  = 1,
 369 };
 370
 371
 372 static struct platform_device s3c24xx_pwm_device = {
 373         .name           = "s3c24xx_pwm",
 374         .num_resources  = 0,
 375 };
 376
 377 static struct platform_device gta02_dfbmcs320_device = {
 378         .name = "dfbmcs320",
 379 };
 380
 381 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 382         {
 383                 I2C_BOARD_INFO("pcf50633", 0x73),
 384                 .irq = GTA02_IRQ_PCF50633,
 385                 .platform_data = &gta02_pcf_pdata,
 386         },
 387         {
 388                 I2C_BOARD_INFO("wm8753", 0x1a),
 389         },
 390 };
 391
 392 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 393         [0] = {
 394                 /*
 395                  * This name is also hard-coded in the boot loaders, so
 396                  * changing it would would require all users to upgrade
 397                  * their boot loaders, some of which are stored in a NOR
 398                  * that is considered to be immutable.
 399                  */
 400                 .name           = "neo1973-nand",
 401                 .nr_chips       = 1,
 402                 .flash_bbt      = 1,
 403         },
 404 };
 405
 406 /*
 407  * Choose a set of timings derived from S3C@2442B MCP54
 408  * data sheet (K5D2G13ACM-D075 MCP Memory).
 409  */
 410
 411 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 412         .tacls          = 0,
 413         .twrph0         = 25,
 414         .twrph1         = 15,
 415         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 416         .sets           = gta02_nand_sets,
 417         .engine_type    = NAND_ECC_ENGINE_TYPE_SOFT,
 418 };
 419
 420
 421 /* Get PMU to set USB current limit accordingly. */
 422 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 423         .vbus_draw      = gta02_udc_vbus_draw,
 424         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 425 };
 426
 427 /* USB */
 428 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 429         .port[0]        = {
 430                 .flags  = S3C_HCDFLG_USED,
 431         },
 432         .port[1]        = {
 433                 .flags  = 0,
 434         },
 435 };
 436
 437 /* Touchscreen */
 438 static struct s3c2410_ts_mach_info gta02_ts_info = {
 439         .delay                  = 10000,
 440         .presc                  = 0xff, /* slow as we can go */
 441         .oversampling_shift     = 2,
 442 };
 443
 444 /* Buttons */
 445 static struct gpio_keys_button gta02_buttons[] = {
 446         {
 447                 .gpio = GTA02_GPIO_AUX_KEY,
 448                 .code = KEY_PHONE,
 449                 .desc = "Aux",
 450                 .type = EV_KEY,
 451                 .debounce_interval = 100,
 452         },
 453         {
 454                 .gpio = GTA02_GPIO_HOLD_KEY,
 455                 .code = KEY_PAUSE,
 456                 .desc = "Hold",
 457                 .type = EV_KEY,
 458                 .debounce_interval = 100,
 459         },
 460 };
 461
 462 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 463         .buttons = gta02_buttons,
 464         .nbuttons = ARRAY_SIZE(gta02_buttons),
 465 };
 466
 467 static struct platform_device gta02_buttons_device = {
 468         .name = "gpio-keys",
 469         .id = -1,
 470         .dev = {
 471                 .platform_data = &gta02_buttons_pdata,
 472         },
 473 };
 474
 475 static struct gpiod_lookup_table gta02_audio_gpio_table = {
 476         .dev_id = "neo1973-audio",
 477         .table = {
 478                 GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
 479                 GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
 480                 { },
 481         },
 482 };
 483
 484 static struct platform_device gta02_audio = {
 485         .name = "neo1973-audio",
 486         .id = -1,
 487 };
 488
 489 static struct gpiod_lookup_table gta02_mmc_gpio_table = {
 490         .dev_id = "s3c2410-sdi",
 491         .table = {
 492                 /* bus pins */
 493                 GPIO_LOOKUP_IDX("GPIOE",  5, "bus", 0, GPIO_ACTIVE_HIGH),
 494                 GPIO_LOOKUP_IDX("GPIOE",  6, "bus", 1, GPIO_ACTIVE_HIGH),
 495                 GPIO_LOOKUP_IDX("GPIOE",  7, "bus", 2, GPIO_ACTIVE_HIGH),
 496                 GPIO_LOOKUP_IDX("GPIOE",  8, "bus", 3, GPIO_ACTIVE_HIGH),
 497                 GPIO_LOOKUP_IDX("GPIOE",  9, "bus", 4, GPIO_ACTIVE_HIGH),
 498                 GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
 499                 { },
 500         },
 501 };
 502
 503 static void __init gta02_map_io(void)
 504 {
 505         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 506         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 507         s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
 508 }
 509
 510
 511 /* These are the guys that don't need to be children of PMU. */
 512
 513 static struct platform_device *gta02_devices[] __initdata = {
 514         &s3c_device_ohci,
 515         &s3c_device_wdt,
 516         &s3c_device_sdi,
 517         &s3c_device_usbgadget,
 518         &s3c_device_nand,
 519         &gta02_nor_flash,
 520         &s3c24xx_pwm_device,
 521         &s3c_device_iis,
 522         &s3c_device_i2c0,
 523         &gta02_dfbmcs320_device,
 524         &gta02_buttons_device,
 525         &s3c_device_adc,
 526         &s3c_device_ts,
 527         &gta02_audio,
 528 };
 529
 530 static void gta02_poweroff(void)
 531 {
 532         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 533 }
 534
 535 static void __init gta02_machine_init(void)
 536 {
 537         /* Set the panic callback to turn AUX LED on or off. */
 538         panic_blink = gta02_panic_blink;
 539
 540         s3c_pm_init();
 541
 542 #ifdef CONFIG_CHARGER_PCF50633
 543         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 544 #endif
 545
 546         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 547         s3c24xx_ts_set_platdata(&gta02_ts_info);
 548         s3c_ohci_set_platdata(&gta02_usb_info);
 549         s3c_nand_set_platdata(&gta02_nand_info);
 550         s3c_i2c0_set_platdata(NULL);
 551
 552         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 553
 554         /* Configure the I2S pins (GPE0...GPE4) in correct mode */
 555         s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
 556                               S3C_GPIO_PULL_NONE);
 557
 558         gpiod_add_lookup_table(&gta02_audio_gpio_table);
 559         gpiod_add_lookup_table(&gta02_mmc_gpio_table);
 560         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 561         pm_power_off = gta02_poweroff;
 562
 563         regulator_has_full_constraints();
 564 }
 565
 566 static void __init gta02_init_time(void)
 567 {
 568         s3c2442_init_clocks(12000000);
 569         s3c24xx_timer_init();
 570 }
 571
 572 MACHINE_START(NEO1973_GTA02, "GTA02")
 573         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 574         .atag_offset    = 0x100,
 575         .map_io         = gta02_map_io,
 576         .init_irq       = s3c2442_init_irq,
 577         .init_machine   = gta02_machine_init,
 578         .init_time      = gta02_init_time,
 579 MACHINE_END