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/serial_s3c.h>
  39 #include <linux/input.h>
  40 #include <linux/io.h>
  41 #include <linux/i2c.h>
  42
  43 #include <linux/mmc/host.h>
  44
  45 #include <linux/mfd/pcf50633/adc.h>
  46 #include <linux/mfd/pcf50633/backlight.h>
  47 #include <linux/mfd/pcf50633/core.h>
  48 #include <linux/mfd/pcf50633/gpio.h>
  49 #include <linux/mfd/pcf50633/mbc.h>
  50 #include <linux/mfd/pcf50633/pmic.h>
  51
  52 #include <linux/mtd/mtd.h>
  53 #include <linux/mtd/nand.h>
  54 #include <linux/mtd/nand_ecc.h>
  55 #include <linux/mtd/partitions.h>
  56 #include <linux/mtd/physmap.h>
  57
  58 #include <linux/regulator/machine.h>
  59
  60 #include <linux/spi/spi.h>
  61 #include <linux/spi/s3c24xx.h>
  62
  63 #include <asm/irq.h>
  64 #include <asm/mach-types.h>
  65 #include <asm/mach/arch.h>
  66 #include <asm/mach/map.h>
  67 #include <asm/mach/irq.h>
  68
  69 #include <linux/platform_data/i2c-s3c2410.h>
  70 #include <linux/platform_data/mtd-nand-s3c2410.h>
  71 #include <linux/platform_data/touchscreen-s3c2410.h>
  72 #include <linux/platform_data/usb-ohci-s3c2410.h>
  73 #include <linux/platform_data/usb-s3c2410_udc.h>
  74
  75 #include <mach/fb.h>
  76 #include <mach/hardware.h>
  77 #include <mach/regs-gpio.h>
  78 #include <mach/regs-irq.h>
  79 #include <mach/gpio-samsung.h>
  80
  81 #include <plat/cpu.h>
  82 #include <plat/devs.h>
  83 #include <plat/gpio-cfg.h>
  84 #include <plat/pm.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 #ifdef CONFIG_PCF50633_ADC
 158 static void
 159 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 160 {
 161         int  ma;
 162
 163         /* Interpret charger type */
 164         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 165
 166                 /*
 167                  * Sanity - stop GPO driving out now that we have a 1A charger
 168                  * GPO controls USB Host power generation on GTA02
 169                  */
 170                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 171
 172                 ma = 1000;
 173         } else
 174                 ma = 100;
 175
 176         pcf50633_mbc_usb_curlim_set(pcf, ma);
 177 }
 178 #endif
 179
 180 static struct delayed_work gta02_charger_work;
 181 static int gta02_usb_vbus_draw;
 182
 183 static void gta02_charger_worker(struct work_struct *work)
 184 {
 185         if (gta02_usb_vbus_draw) {
 186                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 187                 return;
 188         }
 189
 190 #ifdef CONFIG_PCF50633_ADC
 191         pcf50633_adc_async_read(gta02_pcf,
 192                                 PCF50633_ADCC1_MUX_ADCIN1,
 193                                 PCF50633_ADCC1_AVERAGE_16,
 194                                 gta02_configure_pmu_for_charger,
 195                                 NULL);
 196 #else
 197         /*
 198          * If the PCF50633 ADC is disabled we fallback to a
 199          * 100mA limit for safety.
 200          */
 201         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 202 #endif
 203 }
 204
 205 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 206
 207 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 208 {
 209         if (irq == PCF50633_IRQ_USBINS) {
 210                 schedule_delayed_work(&gta02_charger_work,
 211                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 212
 213                 return;
 214         }
 215
 216         if (irq == PCF50633_IRQ_USBREM) {
 217                 cancel_delayed_work_sync(&gta02_charger_work);
 218                 gta02_usb_vbus_draw = 0;
 219         }
 220 }
 221
 222 static void gta02_udc_vbus_draw(unsigned int ma)
 223 {
 224         if (!gta02_pcf)
 225                 return;
 226
 227         gta02_usb_vbus_draw = ma;
 228
 229         schedule_delayed_work(&gta02_charger_work,
 230                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 231 }
 232 #else /* !CONFIG_CHARGER_PCF50633 */
 233 #define gta02_pmu_event_callback        NULL
 234 #define gta02_udc_vbus_draw             NULL
 235 #endif
 236
 237 /*
 238  * This is called when pc50633 is probed, unfortunately quite late in the
 239  * day since it is an I2C bus device. Here we can belatedly define some
 240  * platform devices with the advantage that we can mark the pcf50633 as the
 241  * parent. This makes them get suspended and resumed with their parent
 242  * the pcf50633 still around.
 243  */
 244
 245 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 246
 247
 248 static char *gta02_batteries[] = {
 249         "battery",
 250 };
 251
 252 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 253         .default_brightness = 0x3f,
 254         .default_brightness_limit = 0,
 255         .ramp_time = 5,
 256 };
 257
 258 static struct pcf50633_platform_data gta02_pcf_pdata = {
 259         .resumers = {
 260                 [0] =   PCF50633_INT1_USBINS |
 261                         PCF50633_INT1_USBREM |
 262                         PCF50633_INT1_ALARM,
 263                 [1] =   PCF50633_INT2_ONKEYF,
 264                 [2] =   PCF50633_INT3_ONKEY1S,
 265                 [3] =   PCF50633_INT4_LOWSYS |
 266                         PCF50633_INT4_LOWBAT |
 267                         PCF50633_INT4_HIGHTMP,
 268         },
 269
 270         .batteries = gta02_batteries,
 271         .num_batteries = ARRAY_SIZE(gta02_batteries),
 272
 273         .charger_reference_current_ma = 1000,
 274
 275         .backlight_data = &gta02_backlight_data,
 276
 277         .reg_init_data = {
 278                 [PCF50633_REGULATOR_AUTO] = {
 279                         .constraints = {
 280                                 .min_uV = 3300000,
 281                                 .max_uV = 3300000,
 282                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 283                                 .always_on = 1,
 284                                 .apply_uV = 1,
 285                         },
 286                 },
 287                 [PCF50633_REGULATOR_DOWN1] = {
 288                         .constraints = {
 289                                 .min_uV = 1300000,
 290                                 .max_uV = 1600000,
 291                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 292                                 .always_on = 1,
 293                                 .apply_uV = 1,
 294                         },
 295                 },
 296                 [PCF50633_REGULATOR_DOWN2] = {
 297                         .constraints = {
 298                                 .min_uV = 1800000,
 299                                 .max_uV = 1800000,
 300                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 301                                 .apply_uV = 1,
 302                                 .always_on = 1,
 303                         },
 304                 },
 305                 [PCF50633_REGULATOR_HCLDO] = {
 306                         .constraints = {
 307                                 .min_uV = 2000000,
 308                                 .max_uV = 3300000,
 309                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 310                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 311                                                 REGULATOR_CHANGE_STATUS,
 312                         },
 313                 },
 314                 [PCF50633_REGULATOR_LDO1] = {
 315                         .constraints = {
 316                                 .min_uV = 3300000,
 317                                 .max_uV = 3300000,
 318                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 319                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 320                                 .apply_uV = 1,
 321                         },
 322                 },
 323                 [PCF50633_REGULATOR_LDO2] = {
 324                         .constraints = {
 325                                 .min_uV = 3300000,
 326                                 .max_uV = 3300000,
 327                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 328                                 .apply_uV = 1,
 329                         },
 330                 },
 331                 [PCF50633_REGULATOR_LDO3] = {
 332                         .constraints = {
 333                                 .min_uV = 3000000,
 334                                 .max_uV = 3000000,
 335                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 336                                 .apply_uV = 1,
 337                         },
 338                 },
 339                 [PCF50633_REGULATOR_LDO4] = {
 340                         .constraints = {
 341                                 .min_uV = 3200000,
 342                                 .max_uV = 3200000,
 343                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 344                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 345                                 .apply_uV = 1,
 346                         },
 347                 },
 348                 [PCF50633_REGULATOR_LDO5] = {
 349                         .constraints = {
 350                                 .min_uV = 3000000,
 351                                 .max_uV = 3000000,
 352                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 353                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 354                                 .apply_uV = 1,
 355                         },
 356                 },
 357                 [PCF50633_REGULATOR_LDO6] = {
 358                         .constraints = {
 359                                 .min_uV = 3000000,
 360                                 .max_uV = 3000000,
 361                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 362                         },
 363                 },
 364                 [PCF50633_REGULATOR_MEMLDO] = {
 365                         .constraints = {
 366                                 .min_uV = 1800000,
 367                                 .max_uV = 1800000,
 368                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 369                         },
 370                 },
 371
 372         },
 373         .probe_done = gta02_pmu_attach_child_devices,
 374         .mbc_event_callback = gta02_pmu_event_callback,
 375 };
 376
 377
 378 /* NOR Flash. */
 379
 380 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 381 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 382
 383 static struct physmap_flash_data gta02_nor_flash_data = {
 384         .width          = 2,
 385 };
 386
 387 static struct resource gta02_nor_flash_resource =
 388         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 389
 390 static struct platform_device gta02_nor_flash = {
 391         .name           = "physmap-flash",
 392         .id             = 0,
 393         .dev            = {
 394                 .platform_data  = &gta02_nor_flash_data,
 395         },
 396         .resource       = &gta02_nor_flash_resource,
 397         .num_resources  = 1,
 398 };
 399
 400
 401 static struct platform_device s3c24xx_pwm_device = {
 402         .name           = "s3c24xx_pwm",
 403         .num_resources  = 0,
 404 };
 405
 406 static struct platform_device gta02_dfbmcs320_device = {
 407         .name = "dfbmcs320",
 408 };
 409
 410 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 411         {
 412                 I2C_BOARD_INFO("pcf50633", 0x73),
 413                 .irq = GTA02_IRQ_PCF50633,
 414                 .platform_data = &gta02_pcf_pdata,
 415         },
 416         {
 417                 I2C_BOARD_INFO("wm8753", 0x1a),
 418         },
 419 };
 420
 421 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 422         [0] = {
 423                 /*
 424                  * This name is also hard-coded in the boot loaders, so
 425                  * changing it would would require all users to upgrade
 426                  * their boot loaders, some of which are stored in a NOR
 427                  * that is considered to be immutable.
 428                  */
 429                 .name           = "neo1973-nand",
 430                 .nr_chips       = 1,
 431                 .flash_bbt      = 1,
 432         },
 433 };
 434
 435 /*
 436  * Choose a set of timings derived from S3C@2442B MCP54
 437  * data sheet (K5D2G13ACM-D075 MCP Memory).
 438  */
 439
 440 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 441         .tacls          = 0,
 442         .twrph0         = 25,
 443         .twrph1         = 15,
 444         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 445         .sets           = gta02_nand_sets,
 446 };
 447
 448
 449 /* Get PMU to set USB current limit accordingly. */
 450 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 451         .vbus_draw      = gta02_udc_vbus_draw,
 452         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 453 };
 454
 455 /* USB */
 456 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 457         .port[0]        = {
 458                 .flags  = S3C_HCDFLG_USED,
 459         },
 460         .port[1]        = {
 461                 .flags  = 0,
 462         },
 463 };
 464
 465 /* Touchscreen */
 466 static struct s3c2410_ts_mach_info gta02_ts_info = {
 467         .delay                  = 10000,
 468         .presc                  = 0xff, /* slow as we can go */
 469         .oversampling_shift     = 2,
 470 };
 471
 472 /* Buttons */
 473 static struct gpio_keys_button gta02_buttons[] = {
 474         {
 475                 .gpio = GTA02_GPIO_AUX_KEY,
 476                 .code = KEY_PHONE,
 477                 .desc = "Aux",
 478                 .type = EV_KEY,
 479                 .debounce_interval = 100,
 480         },
 481         {
 482                 .gpio = GTA02_GPIO_HOLD_KEY,
 483                 .code = KEY_PAUSE,
 484                 .desc = "Hold",
 485                 .type = EV_KEY,
 486                 .debounce_interval = 100,
 487         },
 488 };
 489
 490 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 491         .buttons = gta02_buttons,
 492         .nbuttons = ARRAY_SIZE(gta02_buttons),
 493 };
 494
 495 static struct platform_device gta02_buttons_device = {
 496         .name = "gpio-keys",
 497         .id = -1,
 498         .dev = {
 499                 .platform_data = &gta02_buttons_pdata,
 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         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_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 };
 528
 529 /* These guys DO need to be children of PMU. */
 530
 531 static struct platform_device *gta02_devices_pmu_children[] = {
 532 };
 533
 534
 535 /*
 536  * This is called when pc50633 is probed, quite late in the day since it is an
 537  * I2C bus device.  Here we can define platform devices with the advantage that
 538  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 539  * resumed with their parent the pcf50633 still around.  All devices whose
 540  * operation depends on something from pcf50633 must have this relationship
 541  * made explicit like this, or suspend and resume will become an unreliable
 542  * hellworld.
 543  */
 544
 545 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 546 {
 547         int n;
 548
 549         /* Grab a copy of the now probed PMU pointer. */
 550         gta02_pcf = pcf;
 551
 552         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 553                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 554
 555         platform_add_devices(gta02_devices_pmu_children,
 556                              ARRAY_SIZE(gta02_devices_pmu_children));
 557 }
 558
 559 static void gta02_poweroff(void)
 560 {
 561         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 562 }
 563
 564 static void __init gta02_machine_init(void)
 565 {
 566         /* Set the panic callback to turn AUX LED on or off. */
 567         panic_blink = gta02_panic_blink;
 568
 569         s3c_pm_init();
 570
 571 #ifdef CONFIG_CHARGER_PCF50633
 572         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 573 #endif
 574
 575         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 576         s3c24xx_ts_set_platdata(&gta02_ts_info);
 577         s3c_ohci_set_platdata(&gta02_usb_info);
 578         s3c_nand_set_platdata(&gta02_nand_info);
 579         s3c_i2c0_set_platdata(NULL);
 580
 581         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 582
 583         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 584         pm_power_off = gta02_poweroff;
 585
 586         regulator_has_full_constraints();
 587 }
 588
 589 static void __init gta02_init_time(void)
 590 {
 591         s3c2442_init_clocks(12000000);
 592         samsung_timer_init();
 593 }
 594
 595 MACHINE_START(NEO1973_GTA02, "GTA02")
 596         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 597         .atag_offset    = 0x100,
 598         .map_io         = gta02_map_io,
 599         .init_irq       = s3c2442_init_irq,
 600         .init_machine   = gta02_machine_init,
 601         .init_time      = gta02_init_time,
 602 MACHINE_END