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