arch/arm/mach-s3c24xx/mach-gta02.c

   1 /*
   2  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   3  *
   4  * Copyright (C) 2006-2009 by Openmoko, Inc.
   5  * Authors: Harald Welte <laforge@openmoko.org>
   6  *          Andy Green <andy@openmoko.org>
   7  *          Werner Almesberger <werner@openmoko.org>
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/list.h>
  30 #include <linux/delay.h>
  31 #include <linux/timer.h>
  32 #include <linux/init.h>
  33 #include <linux/gpio.h>
  34 #include <linux/gpio_keys.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/serial_core.h>
  38 #include <linux/input.h>
  39 #include <linux/io.h>
  40 #include <linux/i2c.h>
  41
  42 #include <linux/mmc/host.h>
  43
  44 #include <linux/mfd/pcf50633/adc.h>
  45 #include <linux/mfd/pcf50633/backlight.h>
  46 #include <linux/mfd/pcf50633/core.h>
  47 #include <linux/mfd/pcf50633/gpio.h>
  48 #include <linux/mfd/pcf50633/mbc.h>
  49 #include <linux/mfd/pcf50633/pmic.h>
  50
  51 #include <linux/mtd/mtd.h>
  52 #include <linux/mtd/nand.h>
  53 #include <linux/mtd/nand_ecc.h>
  54 #include <linux/mtd/partitions.h>
  55 #include <linux/mtd/physmap.h>
  56
  57 #include <linux/regulator/machine.h>
  58
  59 #include <linux/spi/spi.h>
  60 #include <linux/spi/s3c24xx.h>
  61
  62 #include <asm/irq.h>
  63 #include <asm/mach-types.h>
  64 #include <asm/mach/arch.h>
  65 #include <asm/mach/map.h>
  66 #include <asm/mach/irq.h>
  67
  68 #include <linux/platform_data/i2c-s3c2410.h>
  69 #include <linux/platform_data/mtd-nand-s3c2410.h>
  70 #include <linux/platform_data/touchscreen-s3c2410.h>
  71 #include <linux/platform_data/usb-ohci-s3c2410.h>
  72 #include <linux/platform_data/usb-s3c2410_udc.h>
  73
  74 #include <mach/fb.h>
  75 #include <mach/hardware.h>
  76 #include <mach/regs-gpio.h>
  77 #include <mach/regs-irq.h>
  78 #include <mach/gpio-samsung.h>
  79
  80 #include <plat/cpu.h>
  81 #include <plat/devs.h>
  82 #include <plat/gpio-cfg.h>
  83 #include <plat/pm.h>
  84 #include <plat/regs-serial.h>
  85 #include <plat/samsung-time.h>
  86
  87 #include "common.h"
  88 #include "gta02.h"
  89
  90 static struct pcf50633 *gta02_pcf;
  91
  92 /*
  93  * This gets called frequently when we paniced.
  94  */
  95
  96 static long gta02_panic_blink(int state)
  97 {
  98         long delay = 0;
  99         char led;
 100
 101         led = (state) ? 1 : 0;
 102         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 103
 104         return delay;
 105 }
 106
 107
 108 static struct map_desc gta02_iodesc[] __initdata = {
 109         {
 110                 .virtual        = 0xe0000000,
 111                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 112                 .length         = SZ_1M,
 113                 .type           = MT_DEVICE
 114         },
 115 };
 116
 117 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 118 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 119 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 120
 121 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 122         [0] = {
 123                 .hwport         = 0,
 124                 .flags          = 0,
 125                 .ucon           = UCON,
 126                 .ulcon          = ULCON,
 127                 .ufcon          = UFCON,
 128         },
 129         [1] = {
 130                 .hwport         = 1,
 131                 .flags          = 0,
 132                 .ucon           = UCON,
 133                 .ulcon          = ULCON,
 134                 .ufcon          = UFCON,
 135         },
 136         [2] = {
 137                 .hwport         = 2,
 138                 .flags          = 0,
 139                 .ucon           = UCON,
 140                 .ulcon          = ULCON,
 141                 .ufcon          = UFCON,
 142         },
 143 };
 144
 145 #ifdef CONFIG_CHARGER_PCF50633
 146 /*
 147  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 148  * We use this to recognize that we can pull 1A from the USB socket.
 149  *
 150  * These constants are the measured pcf50633 ADC levels with the 1A
 151  * charger / 48K resistor, and with no pulldown resistor.
 152  */
 153
 154 #define ADC_NOM_CHG_DETECT_1A 6
 155 #define ADC_NOM_CHG_DETECT_USB 43
 156
 157 static void
 158 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 159 {
 160         int  ma;
 161
 162         /* Interpret charger type */
 163         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 164
 165                 /*
 166                  * Sanity - stop GPO driving out now that we have a 1A charger
 167                  * GPO controls USB Host power generation on GTA02
 168                  */
 169                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 170
 171                 ma = 1000;
 172         } else
 173                 ma = 100;
 174
 175         pcf50633_mbc_usb_curlim_set(pcf, ma);
 176 }
 177
 178 static struct delayed_work gta02_charger_work;
 179 static int gta02_usb_vbus_draw;
 180
 181 static void gta02_charger_worker(struct work_struct *work)
 182 {
 183         if (gta02_usb_vbus_draw) {
 184                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 185                 return;
 186         }
 187
 188 #ifdef CONFIG_PCF50633_ADC
 189         pcf50633_adc_async_read(gta02_pcf,
 190                                 PCF50633_ADCC1_MUX_ADCIN1,
 191                                 PCF50633_ADCC1_AVERAGE_16,
 192                                 gta02_configure_pmu_for_charger,
 193                                 NULL);
 194 #else
 195         /*
 196          * If the PCF50633 ADC is disabled we fallback to a
 197          * 100mA limit for safety.
 198          */
 199         pcf50633_mbc_usb_curlim_set(pcf, 100);
 200 #endif
 201 }
 202
 203 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 204
 205 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 206 {
 207         if (irq == PCF50633_IRQ_USBINS) {
 208                 schedule_delayed_work(&gta02_charger_work,
 209                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 210
 211                 return;
 212         }
 213
 214         if (irq == PCF50633_IRQ_USBREM) {
 215                 cancel_delayed_work_sync(&gta02_charger_work);
 216                 gta02_usb_vbus_draw = 0;
 217         }
 218 }
 219
 220 static void gta02_udc_vbus_draw(unsigned int ma)
 221 {
 222         if (!gta02_pcf)
 223                 return;
 224
 225         gta02_usb_vbus_draw = ma;
 226
 227         schedule_delayed_work(&gta02_charger_work,
 228                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 229 }
 230 #else /* !CONFIG_CHARGER_PCF50633 */
 231 #define gta02_pmu_event_callback        NULL
 232 #define gta02_udc_vbus_draw             NULL
 233 #endif
 234
 235 /*
 236  * This is called when pc50633 is probed, unfortunately quite late in the
 237  * day since it is an I2C bus device. Here we can belatedly define some
 238  * platform devices with the advantage that we can mark the pcf50633 as the
 239  * parent. This makes them get suspended and resumed with their parent
 240  * the pcf50633 still around.
 241  */
 242
 243 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 244
 245
 246 static char *gta02_batteries[] = {
 247         "battery",
 248 };
 249
 250 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 251         .default_brightness = 0x3f,
 252         .default_brightness_limit = 0,
 253         .ramp_time = 5,
 254 };
 255
 256 static struct pcf50633_platform_data gta02_pcf_pdata = {
 257         .resumers = {
 258                 [0] =   PCF50633_INT1_USBINS |
 259                         PCF50633_INT1_USBREM |
 260                         PCF50633_INT1_ALARM,
 261                 [1] =   PCF50633_INT2_ONKEYF,
 262                 [2] =   PCF50633_INT3_ONKEY1S,
 263                 [3] =   PCF50633_INT4_LOWSYS |
 264                         PCF50633_INT4_LOWBAT |
 265                         PCF50633_INT4_HIGHTMP,
 266         },
 267
 268         .batteries = gta02_batteries,
 269         .num_batteries = ARRAY_SIZE(gta02_batteries),
 270
 271         .charger_reference_current_ma = 1000,
 272
 273         .backlight_data = &gta02_backlight_data,
 274
 275         .reg_init_data = {
 276                 [PCF50633_REGULATOR_AUTO] = {
 277                         .constraints = {
 278                                 .min_uV = 3300000,
 279                                 .max_uV = 3300000,
 280                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 281                                 .always_on = 1,
 282                                 .apply_uV = 1,
 283                         },
 284                 },
 285                 [PCF50633_REGULATOR_DOWN1] = {
 286                         .constraints = {
 287                                 .min_uV = 1300000,
 288                                 .max_uV = 1600000,
 289                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 290                                 .always_on = 1,
 291                                 .apply_uV = 1,
 292                         },
 293                 },
 294                 [PCF50633_REGULATOR_DOWN2] = {
 295                         .constraints = {
 296                                 .min_uV = 1800000,
 297                                 .max_uV = 1800000,
 298                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 299                                 .apply_uV = 1,
 300                                 .always_on = 1,
 301                         },
 302                 },
 303                 [PCF50633_REGULATOR_HCLDO] = {
 304                         .constraints = {
 305                                 .min_uV = 2000000,
 306                                 .max_uV = 3300000,
 307                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 308                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 309                                                 REGULATOR_CHANGE_STATUS,
 310                         },
 311                 },
 312                 [PCF50633_REGULATOR_LDO1] = {
 313                         .constraints = {
 314                                 .min_uV = 3300000,
 315                                 .max_uV = 3300000,
 316                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 317                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 318                                 .apply_uV = 1,
 319                         },
 320                 },
 321                 [PCF50633_REGULATOR_LDO2] = {
 322                         .constraints = {
 323                                 .min_uV = 3300000,
 324                                 .max_uV = 3300000,
 325                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 326                                 .apply_uV = 1,
 327                         },
 328                 },
 329                 [PCF50633_REGULATOR_LDO3] = {
 330                         .constraints = {
 331                                 .min_uV = 3000000,
 332                                 .max_uV = 3000000,
 333                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 334                                 .apply_uV = 1,
 335                         },
 336                 },
 337                 [PCF50633_REGULATOR_LDO4] = {
 338                         .constraints = {
 339                                 .min_uV = 3200000,
 340                                 .max_uV = 3200000,
 341                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 342                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 343                                 .apply_uV = 1,
 344                         },
 345                 },
 346                 [PCF50633_REGULATOR_LDO5] = {
 347                         .constraints = {
 348                                 .min_uV = 3000000,
 349                                 .max_uV = 3000000,
 350                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 351                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 352                                 .apply_uV = 1,
 353                         },
 354                 },
 355                 [PCF50633_REGULATOR_LDO6] = {
 356                         .constraints = {
 357                                 .min_uV = 3000000,
 358                                 .max_uV = 3000000,
 359                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 360                         },
 361                 },
 362                 [PCF50633_REGULATOR_MEMLDO] = {
 363                         .constraints = {
 364                                 .min_uV = 1800000,
 365                                 .max_uV = 1800000,
 366                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 367                         },
 368                 },
 369
 370         },
 371         .probe_done = gta02_pmu_attach_child_devices,
 372         .mbc_event_callback = gta02_pmu_event_callback,
 373 };
 374
 375
 376 /* NOR Flash. */
 377
 378 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 379 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 380
 381 static struct physmap_flash_data gta02_nor_flash_data = {
 382         .width          = 2,
 383 };
 384
 385 static struct resource gta02_nor_flash_resource =
 386         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 387
 388 static struct platform_device gta02_nor_flash = {
 389         .name           = "physmap-flash",
 390         .id             = 0,
 391         .dev            = {
 392                 .platform_data  = &gta02_nor_flash_data,
 393         },
 394         .resource       = &gta02_nor_flash_resource,
 395         .num_resources  = 1,
 396 };
 397
 398
 399 static struct platform_device s3c24xx_pwm_device = {
 400         .name           = "s3c24xx_pwm",
 401         .num_resources  = 0,
 402 };
 403
 404 static struct platform_device gta02_dfbmcs320_device = {
 405         .name = "dfbmcs320",
 406 };
 407
 408 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 409         {
 410                 I2C_BOARD_INFO("pcf50633", 0x73),
 411                 .irq = GTA02_IRQ_PCF50633,
 412                 .platform_data = &gta02_pcf_pdata,
 413         },
 414         {
 415                 I2C_BOARD_INFO("wm8753", 0x1a),
 416         },
 417 };
 418
 419 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 420         [0] = {
 421                 /*
 422                  * This name is also hard-coded in the boot loaders, so
 423                  * changing it would would require all users to upgrade
 424                  * their boot loaders, some of which are stored in a NOR
 425                  * that is considered to be immutable.
 426                  */
 427                 .name           = "neo1973-nand",
 428                 .nr_chips       = 1,
 429                 .flash_bbt      = 1,
 430         },
 431 };
 432
 433 /*
 434  * Choose a set of timings derived from S3C@2442B MCP54
 435  * data sheet (K5D2G13ACM-D075 MCP Memory).
 436  */
 437
 438 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 439         .tacls          = 0,
 440         .twrph0         = 25,
 441         .twrph1         = 15,
 442         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 443         .sets           = gta02_nand_sets,
 444 };
 445
 446
 447 /* Get PMU to set USB current limit accordingly. */
 448 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 449         .vbus_draw      = gta02_udc_vbus_draw,
 450         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 451 };
 452
 453 /* USB */
 454 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 455         .port[0]        = {
 456                 .flags  = S3C_HCDFLG_USED,
 457         },
 458         .port[1]        = {
 459                 .flags  = 0,
 460         },
 461 };
 462
 463 /* Touchscreen */
 464 static struct s3c2410_ts_mach_info gta02_ts_info = {
 465         .delay                  = 10000,
 466         .presc                  = 0xff, /* slow as we can go */
 467         .oversampling_shift     = 2,
 468 };
 469
 470 /* Buttons */
 471 static struct gpio_keys_button gta02_buttons[] = {
 472         {
 473                 .gpio = GTA02_GPIO_AUX_KEY,
 474                 .code = KEY_PHONE,
 475                 .desc = "Aux",
 476                 .type = EV_KEY,
 477                 .debounce_interval = 100,
 478         },
 479         {
 480                 .gpio = GTA02_GPIO_HOLD_KEY,
 481                 .code = KEY_PAUSE,
 482                 .desc = "Hold",
 483                 .type = EV_KEY,
 484                 .debounce_interval = 100,
 485         },
 486 };
 487
 488 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 489         .buttons = gta02_buttons,
 490         .nbuttons = ARRAY_SIZE(gta02_buttons),
 491 };
 492
 493 static struct platform_device gta02_buttons_device = {
 494         .name = "gpio-keys",
 495         .id = -1,
 496         .dev = {
 497                 .platform_data = &gta02_buttons_pdata,
 498         },
 499 };
 500
 501 static void __init gta02_map_io(void)
 502 {
 503         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 504         s3c24xx_init_clocks(12000000);
 505         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 506         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 507 }
 508
 509
 510 /* These are the guys that don't need to be children of PMU. */
 511
 512 static struct platform_device *gta02_devices[] __initdata = {
 513         &s3c_device_ohci,
 514         &s3c_device_wdt,
 515         &s3c_device_sdi,
 516         &s3c_device_usbgadget,
 517         &s3c_device_nand,
 518         &gta02_nor_flash,
 519         &s3c24xx_pwm_device,
 520         &s3c_device_iis,
 521         &s3c_device_i2c0,
 522         &gta02_dfbmcs320_device,
 523         &gta02_buttons_device,
 524         &s3c_device_adc,
 525         &s3c_device_ts,
 526 };
 527
 528 /* These guys DO need to be children of PMU. */
 529
 530 static struct platform_device *gta02_devices_pmu_children[] = {
 531 };
 532
 533
 534 /*
 535  * This is called when pc50633 is probed, quite late in the day since it is an
 536  * I2C bus device.  Here we can define platform devices with the advantage that
 537  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 538  * resumed with their parent the pcf50633 still around.  All devices whose
 539  * operation depends on something from pcf50633 must have this relationship
 540  * made explicit like this, or suspend and resume will become an unreliable
 541  * hellworld.
 542  */
 543
 544 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 545 {
 546         int n;
 547
 548         /* Grab a copy of the now probed PMU pointer. */
 549         gta02_pcf = pcf;
 550
 551         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 552                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 553
 554         platform_add_devices(gta02_devices_pmu_children,
 555                              ARRAY_SIZE(gta02_devices_pmu_children));
 556 }
 557
 558 static void gta02_poweroff(void)
 559 {
 560         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 561 }
 562
 563 static void __init gta02_machine_init(void)
 564 {
 565         /* Set the panic callback to turn AUX LED on or off. */
 566         panic_blink = gta02_panic_blink;
 567
 568         s3c_pm_init();
 569
 570 #ifdef CONFIG_CHARGER_PCF50633
 571         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 572 #endif
 573
 574         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 575         s3c24xx_ts_set_platdata(&gta02_ts_info);
 576         s3c_ohci_set_platdata(&gta02_usb_info);
 577         s3c_nand_set_platdata(&gta02_nand_info);
 578         s3c_i2c0_set_platdata(NULL);
 579
 580         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 581
 582         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 583         pm_power_off = gta02_poweroff;
 584
 585         regulator_has_full_constraints();
 586 }
 587
 588
 589 MACHINE_START(NEO1973_GTA02, "GTA02")
 590         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 591         .atag_offset    = 0x100,
 592         .map_io         = gta02_map_io,
 593         .init_irq       = s3c2442_init_irq,
 594         .init_machine   = gta02_machine_init,
 595         .init_time      = samsung_timer_init,
 596         .restart        = s3c244x_restart,
 597 MACHINE_END