arch/arm/mach-s3c2440/mach-gta02.c

   1 /*
   2  * linux/arch/arm/mach-s3c2442/mach-gta02.c
   3  *
   4  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   5  *
   6  * Copyright (C) 2006-2009 by Openmoko, Inc.
   7  * Authors: Harald Welte <laforge@openmoko.org>
   8  *          Andy Green <andy@openmoko.org>
   9  *          Werner Almesberger <werner@openmoko.org>
  10  * All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  *
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/types.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/list.h>
  33 #include <linux/delay.h>
  34 #include <linux/timer.h>
  35 #include <linux/init.h>
  36 #include <linux/gpio.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/platform_device.h>
  39 #include <linux/serial_core.h>
  40 #include <linux/spi/spi.h>
  41
  42 #include <linux/mmc/host.h>
  43
  44 #include <linux/mtd/mtd.h>
  45 #include <linux/mtd/nand.h>
  46 #include <linux/mtd/nand_ecc.h>
  47 #include <linux/mtd/partitions.h>
  48 #include <linux/mtd/physmap.h>
  49 #include <linux/io.h>
  50
  51 #include <linux/i2c.h>
  52 #include <linux/regulator/machine.h>
  53
  54 #include <linux/mfd/pcf50633/core.h>
  55 #include <linux/mfd/pcf50633/mbc.h>
  56 #include <linux/mfd/pcf50633/adc.h>
  57 #include <linux/mfd/pcf50633/gpio.h>
  58 #include <linux/mfd/pcf50633/pmic.h>
  59 #include <linux/mfd/pcf50633/backlight.h>
  60
  61 #include <linux/input.h>
  62 #include <linux/gpio_keys.h>
  63
  64 #include <asm/mach/arch.h>
  65 #include <asm/mach/map.h>
  66 #include <asm/mach/irq.h>
  67
  68 #include <asm/irq.h>
  69 #include <asm/mach-types.h>
  70
  71 #include <mach/regs-irq.h>
  72 #include <mach/regs-gpio.h>
  73 #include <mach/regs-gpioj.h>
  74 #include <mach/fb.h>
  75
  76 #include <mach/spi.h>
  77 #include <mach/spi-gpio.h>
  78 #include <plat/usb-control.h>
  79 #include <mach/regs-mem.h>
  80 #include <mach/hardware.h>
  81
  82 #include <mach/gta02.h>
  83
  84 #include <plat/regs-serial.h>
  85 #include <plat/nand.h>
  86 #include <plat/devs.h>
  87 #include <plat/cpu.h>
  88 #include <plat/pm.h>
  89 #include <plat/udc.h>
  90 #include <plat/gpio-cfg.h>
  91 #include <plat/iic.h>
  92 #include <plat/ts.h>
  93
  94
  95 static struct pcf50633 *gta02_pcf;
  96
  97 /*
  98  * This gets called frequently when we paniced.
  99  */
 100
 101 static long gta02_panic_blink(int state)
 102 {
 103         long delay = 0;
 104         char led;
 105
 106         led = (state) ? 1 : 0;
 107         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 108
 109         return delay;
 110 }
 111
 112
 113 static struct map_desc gta02_iodesc[] __initdata = {
 114         {
 115                 .virtual        = 0xe0000000,
 116                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 117                 .length         = SZ_1M,
 118                 .type           = MT_DEVICE
 119         },
 120 };
 121
 122 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 123 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 124 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 125
 126 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 127         [0] = {
 128                 .hwport         = 0,
 129                 .flags          = 0,
 130                 .ucon           = UCON,
 131                 .ulcon          = ULCON,
 132                 .ufcon          = UFCON,
 133         },
 134         [1] = {
 135                 .hwport         = 1,
 136                 .flags          = 0,
 137                 .ucon           = UCON,
 138                 .ulcon          = ULCON,
 139                 .ufcon          = UFCON,
 140         },
 141         [2] = {
 142                 .hwport         = 2,
 143                 .flags          = 0,
 144                 .ucon           = UCON,
 145                 .ulcon          = ULCON,
 146                 .ufcon          = UFCON,
 147         },
 148 };
 149
 150 #ifdef CONFIG_CHARGER_PCF50633
 151 /*
 152  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 153  * We use this to recognize that we can pull 1A from the USB socket.
 154  *
 155  * These constants are the measured pcf50633 ADC levels with the 1A
 156  * charger / 48K resistor, and with no pulldown resistor.
 157  */
 158
 159 #define ADC_NOM_CHG_DETECT_1A 6
 160 #define ADC_NOM_CHG_DETECT_USB 43
 161
 162 static void
 163 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 164 {
 165         int  ma;
 166
 167         /* Interpret charger type */
 168         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 169
 170                 /*
 171                  * Sanity - stop GPO driving out now that we have a 1A charger
 172                  * GPO controls USB Host power generation on GTA02
 173                  */
 174                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 175
 176                 ma = 1000;
 177         } else
 178                 ma = 100;
 179
 180         pcf50633_mbc_usb_curlim_set(pcf, ma);
 181 }
 182
 183 static struct delayed_work gta02_charger_work;
 184 static int gta02_usb_vbus_draw;
 185
 186 static void gta02_charger_worker(struct work_struct *work)
 187 {
 188         if (gta02_usb_vbus_draw) {
 189                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 190                 return;
 191         }
 192
 193 #ifdef CONFIG_PCF50633_ADC
 194         pcf50633_adc_async_read(gta02_pcf,
 195                                 PCF50633_ADCC1_MUX_ADCIN1,
 196                                 PCF50633_ADCC1_AVERAGE_16,
 197                                 gta02_configure_pmu_for_charger,
 198                                 NULL);
 199 #else
 200         /*
 201          * If the PCF50633 ADC is disabled we fallback to a
 202          * 100mA limit for safety.
 203          */
 204         pcf50633_mbc_usb_curlim_set(pcf, 100);
 205 #endif
 206 }
 207
 208 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 209
 210 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 211 {
 212         if (irq == PCF50633_IRQ_USBINS) {
 213                 schedule_delayed_work(&gta02_charger_work,
 214                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 215
 216                 return;
 217         }
 218
 219         if (irq == PCF50633_IRQ_USBREM) {
 220                 cancel_delayed_work_sync(&gta02_charger_work);
 221                 gta02_usb_vbus_draw = 0;
 222         }
 223 }
 224
 225 static void gta02_udc_vbus_draw(unsigned int ma)
 226 {
 227         if (!gta02_pcf)
 228                 return;
 229
 230         gta02_usb_vbus_draw = ma;
 231
 232         schedule_delayed_work(&gta02_charger_work,
 233                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 234 }
 235 #else /* !CONFIG_CHARGER_PCF50633 */
 236 #define gta02_pmu_event_callback        NULL
 237 #define gta02_udc_vbus_draw             NULL
 238 #endif
 239
 240 /*
 241  * This is called when pc50633 is probed, unfortunately quite late in the
 242  * day since it is an I2C bus device. Here we can belatedly define some
 243  * platform devices with the advantage that we can mark the pcf50633 as the
 244  * parent. This makes them get suspended and resumed with their parent
 245  * the pcf50633 still around.
 246  */
 247
 248 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 249
 250
 251 static char *gta02_batteries[] = {
 252         "battery",
 253 };
 254
 255 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 256         .default_brightness = 0x3f,
 257         .default_brightness_limit = 0,
 258         .ramp_time = 5,
 259 };
 260
 261 struct pcf50633_platform_data gta02_pcf_pdata = {
 262         .resumers = {
 263                 [0] =   PCF50633_INT1_USBINS |
 264                         PCF50633_INT1_USBREM |
 265                         PCF50633_INT1_ALARM,
 266                 [1] =   PCF50633_INT2_ONKEYF,
 267                 [2] =   PCF50633_INT3_ONKEY1S,
 268                 [3] =   PCF50633_INT4_LOWSYS |
 269                         PCF50633_INT4_LOWBAT |
 270                         PCF50633_INT4_HIGHTMP,
 271         },
 272
 273         .batteries = gta02_batteries,
 274         .num_batteries = ARRAY_SIZE(gta02_batteries),
 275
 276         .charger_reference_current_ma = 1000,
 277
 278         .backlight_data = &gta02_backlight_data,
 279
 280         .reg_init_data = {
 281                 [PCF50633_REGULATOR_AUTO] = {
 282                         .constraints = {
 283                                 .min_uV = 3300000,
 284                                 .max_uV = 3300000,
 285                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 286                                 .always_on = 1,
 287                                 .apply_uV = 1,
 288                         },
 289                 },
 290                 [PCF50633_REGULATOR_DOWN1] = {
 291                         .constraints = {
 292                                 .min_uV = 1300000,
 293                                 .max_uV = 1600000,
 294                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 295                                 .always_on = 1,
 296                                 .apply_uV = 1,
 297                         },
 298                 },
 299                 [PCF50633_REGULATOR_DOWN2] = {
 300                         .constraints = {
 301                                 .min_uV = 1800000,
 302                                 .max_uV = 1800000,
 303                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 304                                 .apply_uV = 1,
 305                                 .always_on = 1,
 306                         },
 307                 },
 308                 [PCF50633_REGULATOR_HCLDO] = {
 309                         .constraints = {
 310                                 .min_uV = 2000000,
 311                                 .max_uV = 3300000,
 312                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 313                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 314                                                 REGULATOR_CHANGE_STATUS,
 315                         },
 316                 },
 317                 [PCF50633_REGULATOR_LDO1] = {
 318                         .constraints = {
 319                                 .min_uV = 3300000,
 320                                 .max_uV = 3300000,
 321                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 322                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 323                                 .apply_uV = 1,
 324                         },
 325                 },
 326                 [PCF50633_REGULATOR_LDO2] = {
 327                         .constraints = {
 328                                 .min_uV = 3300000,
 329                                 .max_uV = 3300000,
 330                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 331                                 .apply_uV = 1,
 332                         },
 333                 },
 334                 [PCF50633_REGULATOR_LDO3] = {
 335                         .constraints = {
 336                                 .min_uV = 3000000,
 337                                 .max_uV = 3000000,
 338                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 339                                 .apply_uV = 1,
 340                         },
 341                 },
 342                 [PCF50633_REGULATOR_LDO4] = {
 343                         .constraints = {
 344                                 .min_uV = 3200000,
 345                                 .max_uV = 3200000,
 346                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 347                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 348                                 .apply_uV = 1,
 349                         },
 350                 },
 351                 [PCF50633_REGULATOR_LDO5] = {
 352                         .constraints = {
 353                                 .min_uV = 3000000,
 354                                 .max_uV = 3000000,
 355                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 356                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 357                                 .apply_uV = 1,
 358                         },
 359                 },
 360                 [PCF50633_REGULATOR_LDO6] = {
 361                         .constraints = {
 362                                 .min_uV = 3000000,
 363                                 .max_uV = 3000000,
 364                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 365                         },
 366                 },
 367                 [PCF50633_REGULATOR_MEMLDO] = {
 368                         .constraints = {
 369                                 .min_uV = 1800000,
 370                                 .max_uV = 1800000,
 371                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 372                         },
 373                 },
 374
 375         },
 376         .probe_done = gta02_pmu_attach_child_devices,
 377         .mbc_event_callback = gta02_pmu_event_callback,
 378 };
 379
 380
 381 /* NOR Flash. */
 382
 383 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 384 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 385
 386 static struct physmap_flash_data gta02_nor_flash_data = {
 387         .width          = 2,
 388 };
 389
 390 static struct resource gta02_nor_flash_resource = {
 391         .start          = GTA02_FLASH_BASE,
 392         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 393         .flags          = IORESOURCE_MEM,
 394 };
 395
 396 static struct platform_device gta02_nor_flash = {
 397         .name           = "physmap-flash",
 398         .id             = 0,
 399         .dev            = {
 400                 .platform_data  = &gta02_nor_flash_data,
 401         },
 402         .resource       = &gta02_nor_flash_resource,
 403         .num_resources  = 1,
 404 };
 405
 406
 407 struct platform_device s3c24xx_pwm_device = {
 408         .name           = "s3c24xx_pwm",
 409         .num_resources  = 0,
 410 };
 411
 412 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 413         {
 414                 I2C_BOARD_INFO("pcf50633", 0x73),
 415                 .irq = GTA02_IRQ_PCF50633,
 416                 .platform_data = &gta02_pcf_pdata,
 417         },
 418         {
 419                 I2C_BOARD_INFO("wm8753", 0x1a),
 420         },
 421 };
 422
 423 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 424         [0] = {
 425                 /*
 426                  * This name is also hard-coded in the boot loaders, so
 427                  * changing it would would require all users to upgrade
 428                  * their boot loaders, some of which are stored in a NOR
 429                  * that is considered to be immutable.
 430                  */
 431                 .name           = "neo1973-nand",
 432                 .nr_chips       = 1,
 433                 .flash_bbt      = 1,
 434         },
 435 };
 436
 437 /*
 438  * Choose a set of timings derived from S3C@2442B MCP54
 439  * data sheet (K5D2G13ACM-D075 MCP Memory).
 440  */
 441
 442 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 443         .tacls          = 0,
 444         .twrph0         = 25,
 445         .twrph1         = 15,
 446         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 447         .sets           = gta02_nand_sets,
 448 };
 449
 450
 451 /* Get PMU to set USB current limit accordingly. */
 452 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 453         .vbus_draw      = gta02_udc_vbus_draw,
 454         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 455 };
 456
 457 /* USB */
 458 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 459         .port[0]        = {
 460                 .flags  = S3C_HCDFLG_USED,
 461         },
 462         .port[1]        = {
 463                 .flags  = 0,
 464         },
 465 };
 466
 467 /* Touchscreen */
 468 static struct s3c2410_ts_mach_info gta02_ts_info = {
 469         .delay                  = 10000,
 470         .presc                  = 0xff, /* slow as we can go */
 471         .oversampling_shift     = 2,
 472 };
 473
 474 /* Buttons */
 475 static struct gpio_keys_button gta02_buttons[] = {
 476         {
 477                 .gpio = GTA02_GPIO_AUX_KEY,
 478                 .code = KEY_PHONE,
 479                 .desc = "Aux",
 480                 .type = EV_KEY,
 481                 .debounce_interval = 100,
 482         },
 483         {
 484                 .gpio = GTA02_GPIO_HOLD_KEY,
 485                 .code = KEY_PAUSE,
 486                 .desc = "Hold",
 487                 .type = EV_KEY,
 488                 .debounce_interval = 100,
 489         },
 490 };
 491
 492 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 493         .buttons = gta02_buttons,
 494         .nbuttons = ARRAY_SIZE(gta02_buttons),
 495 };
 496
 497 static struct platform_device gta02_buttons_device = {
 498         .name = "gpio-keys",
 499         .id = -1,
 500         .dev = {
 501                 .platform_data = &gta02_buttons_pdata,
 502         },
 503 };
 504
 505 static void __init gta02_map_io(void)
 506 {
 507         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 508         s3c24xx_init_clocks(12000000);
 509         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 510 }
 511
 512
 513 /* These are the guys that don't need to be children of PMU. */
 514
 515 static struct platform_device *gta02_devices[] __initdata = {
 516         &s3c_device_ohci,
 517         &s3c_device_wdt,
 518         &s3c_device_sdi,
 519         &s3c_device_usbgadget,
 520         &s3c_device_nand,
 521         &gta02_nor_flash,
 522         &s3c24xx_pwm_device,
 523         &s3c_device_iis,
 524         &samsung_asoc_dma,
 525         &s3c_device_i2c0,
 526         &gta02_buttons_device,
 527         &s3c_device_adc,
 528         &s3c_device_ts,
 529 };
 530
 531 /* These guys DO need to be children of PMU. */
 532
 533 static struct platform_device *gta02_devices_pmu_children[] = {
 534 };
 535
 536
 537 /*
 538  * This is called when pc50633 is probed, quite late in the day since it is an
 539  * I2C bus device.  Here we can define platform devices with the advantage that
 540  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 541  * resumed with their parent the pcf50633 still around.  All devices whose
 542  * operation depends on something from pcf50633 must have this relationship
 543  * made explicit like this, or suspend and resume will become an unreliable
 544  * hellworld.
 545  */
 546
 547 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 548 {
 549         int n;
 550
 551         /* Grab a copy of the now probed PMU pointer. */
 552         gta02_pcf = pcf;
 553
 554         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 555                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 556
 557         platform_add_devices(gta02_devices_pmu_children,
 558                              ARRAY_SIZE(gta02_devices_pmu_children));
 559 }
 560
 561 static void gta02_poweroff(void)
 562 {
 563         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 564 }
 565
 566 static void __init gta02_machine_init(void)
 567 {
 568         /* Set the panic callback to turn AUX LED on or off. */
 569         panic_blink = gta02_panic_blink;
 570
 571         s3c_pm_init();
 572
 573 #ifdef CONFIG_CHARGER_PCF50633
 574         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 575 #endif
 576
 577         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 578         s3c24xx_ts_set_platdata(&gta02_ts_info);
 579         s3c_ohci_set_platdata(&gta02_usb_info);
 580         s3c_nand_set_platdata(&gta02_nand_info);
 581         s3c_i2c0_set_platdata(NULL);
 582
 583         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 584
 585         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 586         pm_power_off = gta02_poweroff;
 587
 588         regulator_has_full_constraints();
 589 }
 590
 591
 592 MACHINE_START(NEO1973_GTA02, "GTA02")
 593         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 594         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 595         .map_io         = gta02_map_io,
 596         .init_irq       = s3c24xx_init_irq,
 597         .init_machine   = gta02_machine_init,
 598         .timer          = &s3c24xx_timer,
 599 MACHINE_END