arch/arm/mach-s3c24xx/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.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
  61 #include <mach/fb.h>
  62 #include <mach/hardware.h>
  63 #include <mach/regs-gpio.h>
  64 #include <mach/regs-irq.h>
  65 #include <mach/gpio-samsung.h>
  66
  67 #include <plat/cpu.h>
  68 #include <plat/devs.h>
  69 #include <plat/gpio-cfg.h>
  70 #include <plat/pm.h>
  71 #include <plat/samsung-time.h>
  72
  73 #include "common.h"
  74 #include "gta02.h"
  75
  76 static struct pcf50633 *gta02_pcf;
  77
  78 /*
  79  * This gets called frequently when we paniced.
  80  */
  81
  82 static long gta02_panic_blink(int state)
  83 {
  84         long delay = 0;
  85         char led;
  86
  87         led = (state) ? 1 : 0;
  88         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
  89
  90         return delay;
  91 }
  92
  93
  94 static struct map_desc gta02_iodesc[] __initdata = {
  95         {
  96                 .virtual        = 0xe0000000,
  97                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
  98                 .length         = SZ_1M,
  99                 .type           = MT_DEVICE
 100         },
 101 };
 102
 103 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 104 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 105 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 106
 107 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 108         [0] = {
 109                 .hwport         = 0,
 110                 .flags          = 0,
 111                 .ucon           = UCON,
 112                 .ulcon          = ULCON,
 113                 .ufcon          = UFCON,
 114         },
 115         [1] = {
 116                 .hwport         = 1,
 117                 .flags          = 0,
 118                 .ucon           = UCON,
 119                 .ulcon          = ULCON,
 120                 .ufcon          = UFCON,
 121         },
 122         [2] = {
 123                 .hwport         = 2,
 124                 .flags          = 0,
 125                 .ucon           = UCON,
 126                 .ulcon          = ULCON,
 127                 .ufcon          = UFCON,
 128         },
 129 };
 130
 131 #ifdef CONFIG_CHARGER_PCF50633
 132 /*
 133  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 134  * We use this to recognize that we can pull 1A from the USB socket.
 135  *
 136  * These constants are the measured pcf50633 ADC levels with the 1A
 137  * charger / 48K resistor, and with no pulldown resistor.
 138  */
 139
 140 #define ADC_NOM_CHG_DETECT_1A 6
 141 #define ADC_NOM_CHG_DETECT_USB 43
 142
 143 #ifdef CONFIG_PCF50633_ADC
 144 static void
 145 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 146 {
 147         int  ma;
 148
 149         /* Interpret charger type */
 150         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 151
 152                 /*
 153                  * Sanity - stop GPO driving out now that we have a 1A charger
 154                  * GPO controls USB Host power generation on GTA02
 155                  */
 156                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 157
 158                 ma = 1000;
 159         } else
 160                 ma = 100;
 161
 162         pcf50633_mbc_usb_curlim_set(pcf, ma);
 163 }
 164 #endif
 165
 166 static struct delayed_work gta02_charger_work;
 167 static int gta02_usb_vbus_draw;
 168
 169 static void gta02_charger_worker(struct work_struct *work)
 170 {
 171         if (gta02_usb_vbus_draw) {
 172                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 173                 return;
 174         }
 175
 176 #ifdef CONFIG_PCF50633_ADC
 177         pcf50633_adc_async_read(gta02_pcf,
 178                                 PCF50633_ADCC1_MUX_ADCIN1,
 179                                 PCF50633_ADCC1_AVERAGE_16,
 180                                 gta02_configure_pmu_for_charger,
 181                                 NULL);
 182 #else
 183         /*
 184          * If the PCF50633 ADC is disabled we fallback to a
 185          * 100mA limit for safety.
 186          */
 187         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 188 #endif
 189 }
 190
 191 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 192
 193 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 194 {
 195         if (irq == PCF50633_IRQ_USBINS) {
 196                 schedule_delayed_work(&gta02_charger_work,
 197                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 198
 199                 return;
 200         }
 201
 202         if (irq == PCF50633_IRQ_USBREM) {
 203                 cancel_delayed_work_sync(&gta02_charger_work);
 204                 gta02_usb_vbus_draw = 0;
 205         }
 206 }
 207
 208 static void gta02_udc_vbus_draw(unsigned int ma)
 209 {
 210         if (!gta02_pcf)
 211                 return;
 212
 213         gta02_usb_vbus_draw = ma;
 214
 215         schedule_delayed_work(&gta02_charger_work,
 216                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 217 }
 218 #else /* !CONFIG_CHARGER_PCF50633 */
 219 #define gta02_pmu_event_callback        NULL
 220 #define gta02_udc_vbus_draw             NULL
 221 #endif
 222
 223 static char *gta02_batteries[] = {
 224         "battery",
 225 };
 226
 227 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 228         .default_brightness = 0x3f,
 229         .default_brightness_limit = 0,
 230         .ramp_time = 5,
 231 };
 232
 233 static struct pcf50633_platform_data gta02_pcf_pdata = {
 234         .resumers = {
 235                 [0] =   PCF50633_INT1_USBINS |
 236                         PCF50633_INT1_USBREM |
 237                         PCF50633_INT1_ALARM,
 238                 [1] =   PCF50633_INT2_ONKEYF,
 239                 [2] =   PCF50633_INT3_ONKEY1S,
 240                 [3] =   PCF50633_INT4_LOWSYS |
 241                         PCF50633_INT4_LOWBAT |
 242                         PCF50633_INT4_HIGHTMP,
 243         },
 244
 245         .batteries = gta02_batteries,
 246         .num_batteries = ARRAY_SIZE(gta02_batteries),
 247
 248         .charger_reference_current_ma = 1000,
 249
 250         .backlight_data = &gta02_backlight_data,
 251
 252         .reg_init_data = {
 253                 [PCF50633_REGULATOR_AUTO] = {
 254                         .constraints = {
 255                                 .min_uV = 3300000,
 256                                 .max_uV = 3300000,
 257                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 258                                 .always_on = 1,
 259                                 .apply_uV = 1,
 260                         },
 261                 },
 262                 [PCF50633_REGULATOR_DOWN1] = {
 263                         .constraints = {
 264                                 .min_uV = 1300000,
 265                                 .max_uV = 1600000,
 266                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 267                                 .always_on = 1,
 268                                 .apply_uV = 1,
 269                         },
 270                 },
 271                 [PCF50633_REGULATOR_DOWN2] = {
 272                         .constraints = {
 273                                 .min_uV = 1800000,
 274                                 .max_uV = 1800000,
 275                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 276                                 .apply_uV = 1,
 277                                 .always_on = 1,
 278                         },
 279                 },
 280                 [PCF50633_REGULATOR_HCLDO] = {
 281                         .constraints = {
 282                                 .min_uV = 2000000,
 283                                 .max_uV = 3300000,
 284                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 285                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 286                                                 REGULATOR_CHANGE_STATUS,
 287                         },
 288                 },
 289                 [PCF50633_REGULATOR_LDO1] = {
 290                         .constraints = {
 291                                 .min_uV = 3300000,
 292                                 .max_uV = 3300000,
 293                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 294                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 295                                 .apply_uV = 1,
 296                         },
 297                 },
 298                 [PCF50633_REGULATOR_LDO2] = {
 299                         .constraints = {
 300                                 .min_uV = 3300000,
 301                                 .max_uV = 3300000,
 302                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 303                                 .apply_uV = 1,
 304                         },
 305                 },
 306                 [PCF50633_REGULATOR_LDO3] = {
 307                         .constraints = {
 308                                 .min_uV = 3000000,
 309                                 .max_uV = 3000000,
 310                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 311                                 .apply_uV = 1,
 312                         },
 313                 },
 314                 [PCF50633_REGULATOR_LDO4] = {
 315                         .constraints = {
 316                                 .min_uV = 3200000,
 317                                 .max_uV = 3200000,
 318                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 319                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 320                                 .apply_uV = 1,
 321                         },
 322                 },
 323                 [PCF50633_REGULATOR_LDO5] = {
 324                         .constraints = {
 325                                 .min_uV = 3000000,
 326                                 .max_uV = 3000000,
 327                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 328                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 329                                 .apply_uV = 1,
 330                         },
 331                 },
 332                 [PCF50633_REGULATOR_LDO6] = {
 333                         .constraints = {
 334                                 .min_uV = 3000000,
 335                                 .max_uV = 3000000,
 336                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 337                         },
 338                 },
 339                 [PCF50633_REGULATOR_MEMLDO] = {
 340                         .constraints = {
 341                                 .min_uV = 1800000,
 342                                 .max_uV = 1800000,
 343                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 344                         },
 345                 },
 346
 347         },
 348         .mbc_event_callback = gta02_pmu_event_callback,
 349 };
 350
 351
 352 /* NOR Flash. */
 353
 354 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 355 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 356
 357 static struct physmap_flash_data gta02_nor_flash_data = {
 358         .width          = 2,
 359 };
 360
 361 static struct resource gta02_nor_flash_resource =
 362         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 363
 364 static struct platform_device gta02_nor_flash = {
 365         .name           = "physmap-flash",
 366         .id             = 0,
 367         .dev            = {
 368                 .platform_data  = &gta02_nor_flash_data,
 369         },
 370         .resource       = &gta02_nor_flash_resource,
 371         .num_resources  = 1,
 372 };
 373
 374
 375 static struct platform_device s3c24xx_pwm_device = {
 376         .name           = "s3c24xx_pwm",
 377         .num_resources  = 0,
 378 };
 379
 380 static struct platform_device gta02_dfbmcs320_device = {
 381         .name = "dfbmcs320",
 382 };
 383
 384 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 385         {
 386                 I2C_BOARD_INFO("pcf50633", 0x73),
 387                 .irq = GTA02_IRQ_PCF50633,
 388                 .platform_data = &gta02_pcf_pdata,
 389         },
 390         {
 391                 I2C_BOARD_INFO("wm8753", 0x1a),
 392         },
 393 };
 394
 395 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 396         [0] = {
 397                 /*
 398                  * This name is also hard-coded in the boot loaders, so
 399                  * changing it would would require all users to upgrade
 400                  * their boot loaders, some of which are stored in a NOR
 401                  * that is considered to be immutable.
 402                  */
 403                 .name           = "neo1973-nand",
 404                 .nr_chips       = 1,
 405                 .flash_bbt      = 1,
 406         },
 407 };
 408
 409 /*
 410  * Choose a set of timings derived from S3C@2442B MCP54
 411  * data sheet (K5D2G13ACM-D075 MCP Memory).
 412  */
 413
 414 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 415         .tacls          = 0,
 416         .twrph0         = 25,
 417         .twrph1         = 15,
 418         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 419         .sets           = gta02_nand_sets,
 420         .engine_type    = NAND_ECC_ENGINE_TYPE_SOFT,
 421 };
 422
 423
 424 /* Get PMU to set USB current limit accordingly. */
 425 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 426         .vbus_draw      = gta02_udc_vbus_draw,
 427         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 428 };
 429
 430 /* USB */
 431 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 432         .port[0]        = {
 433                 .flags  = S3C_HCDFLG_USED,
 434         },
 435         .port[1]        = {
 436                 .flags  = 0,
 437         },
 438 };
 439
 440 /* Touchscreen */
 441 static struct s3c2410_ts_mach_info gta02_ts_info = {
 442         .delay                  = 10000,
 443         .presc                  = 0xff, /* slow as we can go */
 444         .oversampling_shift     = 2,
 445 };
 446
 447 /* Buttons */
 448 static struct gpio_keys_button gta02_buttons[] = {
 449         {
 450                 .gpio = GTA02_GPIO_AUX_KEY,
 451                 .code = KEY_PHONE,
 452                 .desc = "Aux",
 453                 .type = EV_KEY,
 454                 .debounce_interval = 100,
 455         },
 456         {
 457                 .gpio = GTA02_GPIO_HOLD_KEY,
 458                 .code = KEY_PAUSE,
 459                 .desc = "Hold",
 460                 .type = EV_KEY,
 461                 .debounce_interval = 100,
 462         },
 463 };
 464
 465 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 466         .buttons = gta02_buttons,
 467         .nbuttons = ARRAY_SIZE(gta02_buttons),
 468 };
 469
 470 static struct platform_device gta02_buttons_device = {
 471         .name = "gpio-keys",
 472         .id = -1,
 473         .dev = {
 474                 .platform_data = &gta02_buttons_pdata,
 475         },
 476 };
 477
 478 static struct gpiod_lookup_table gta02_audio_gpio_table = {
 479         .dev_id = "neo1973-audio",
 480         .table = {
 481                 GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
 482                 GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
 483                 { },
 484         },
 485 };
 486
 487 static struct platform_device gta02_audio = {
 488         .name = "neo1973-audio",
 489         .id = -1,
 490 };
 491
 492 static void __init gta02_map_io(void)
 493 {
 494         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 495         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 496         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 497 }
 498
 499
 500 /* These are the guys that don't need to be children of PMU. */
 501
 502 static struct platform_device *gta02_devices[] __initdata = {
 503         &s3c_device_ohci,
 504         &s3c_device_wdt,
 505         &s3c_device_sdi,
 506         &s3c_device_usbgadget,
 507         &s3c_device_nand,
 508         &gta02_nor_flash,
 509         &s3c24xx_pwm_device,
 510         &s3c_device_iis,
 511         &s3c_device_i2c0,
 512         &gta02_dfbmcs320_device,
 513         &gta02_buttons_device,
 514         &s3c_device_adc,
 515         &s3c_device_ts,
 516         &gta02_audio,
 517 };
 518
 519 static void gta02_poweroff(void)
 520 {
 521         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 522 }
 523
 524 static void __init gta02_machine_init(void)
 525 {
 526         /* Set the panic callback to turn AUX LED on or off. */
 527         panic_blink = gta02_panic_blink;
 528
 529         s3c_pm_init();
 530
 531 #ifdef CONFIG_CHARGER_PCF50633
 532         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 533 #endif
 534
 535         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 536         s3c24xx_ts_set_platdata(&gta02_ts_info);
 537         s3c_ohci_set_platdata(&gta02_usb_info);
 538         s3c_nand_set_platdata(&gta02_nand_info);
 539         s3c_i2c0_set_platdata(NULL);
 540
 541         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 542
 543         gpiod_add_lookup_table(&gta02_audio_gpio_table);
 544         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 545         pm_power_off = gta02_poweroff;
 546
 547         regulator_has_full_constraints();
 548 }
 549
 550 static void __init gta02_init_time(void)
 551 {
 552         s3c2442_init_clocks(12000000);
 553         samsung_timer_init();
 554 }
 555
 556 MACHINE_START(NEO1973_GTA02, "GTA02")
 557         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 558         .atag_offset    = 0x100,
 559         .map_io         = gta02_map_io,
 560         .init_irq       = s3c2442_init_irq,
 561         .init_machine   = gta02_machine_init,
 562         .init_time      = gta02_init_time,
 563 MACHINE_END