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 <plat/usb-control.h>
  78 #include <mach/regs-mem.h>
  79 #include <mach/hardware.h>
  80
  81 #include <mach/gta02.h>
  82
  83 #include <plat/regs-serial.h>
  84 #include <plat/nand.h>
  85 #include <plat/devs.h>
  86 #include <plat/cpu.h>
  87 #include <plat/pm.h>
  88 #include <plat/udc.h>
  89 #include <plat/gpio-cfg.h>
  90 #include <plat/iic.h>
  91 #include <plat/ts.h>
  92
  93 #include "common.h"
  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 static 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 static struct platform_device s3c24xx_pwm_device = {
 408         .name           = "s3c24xx_pwm",
 409         .num_resources  = 0,
 410 };
 411
 412 static struct platform_device gta02_dfbmcs320_device = {
 413         .name = "dfbmcs320",
 414 };
 415
 416 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 417         {
 418                 I2C_BOARD_INFO("pcf50633", 0x73),
 419                 .irq = GTA02_IRQ_PCF50633,
 420                 .platform_data = &gta02_pcf_pdata,
 421         },
 422         {
 423                 I2C_BOARD_INFO("wm8753", 0x1a),
 424         },
 425 };
 426
 427 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 428         [0] = {
 429                 /*
 430                  * This name is also hard-coded in the boot loaders, so
 431                  * changing it would would require all users to upgrade
 432                  * their boot loaders, some of which are stored in a NOR
 433                  * that is considered to be immutable.
 434                  */
 435                 .name           = "neo1973-nand",
 436                 .nr_chips       = 1,
 437                 .flash_bbt      = 1,
 438         },
 439 };
 440
 441 /*
 442  * Choose a set of timings derived from S3C@2442B MCP54
 443  * data sheet (K5D2G13ACM-D075 MCP Memory).
 444  */
 445
 446 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 447         .tacls          = 0,
 448         .twrph0         = 25,
 449         .twrph1         = 15,
 450         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 451         .sets           = gta02_nand_sets,
 452 };
 453
 454
 455 /* Get PMU to set USB current limit accordingly. */
 456 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 457         .vbus_draw      = gta02_udc_vbus_draw,
 458         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 459 };
 460
 461 /* USB */
 462 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 463         .port[0]        = {
 464                 .flags  = S3C_HCDFLG_USED,
 465         },
 466         .port[1]        = {
 467                 .flags  = 0,
 468         },
 469 };
 470
 471 /* Touchscreen */
 472 static struct s3c2410_ts_mach_info gta02_ts_info = {
 473         .delay                  = 10000,
 474         .presc                  = 0xff, /* slow as we can go */
 475         .oversampling_shift     = 2,
 476 };
 477
 478 /* Buttons */
 479 static struct gpio_keys_button gta02_buttons[] = {
 480         {
 481                 .gpio = GTA02_GPIO_AUX_KEY,
 482                 .code = KEY_PHONE,
 483                 .desc = "Aux",
 484                 .type = EV_KEY,
 485                 .debounce_interval = 100,
 486         },
 487         {
 488                 .gpio = GTA02_GPIO_HOLD_KEY,
 489                 .code = KEY_PAUSE,
 490                 .desc = "Hold",
 491                 .type = EV_KEY,
 492                 .debounce_interval = 100,
 493         },
 494 };
 495
 496 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 497         .buttons = gta02_buttons,
 498         .nbuttons = ARRAY_SIZE(gta02_buttons),
 499 };
 500
 501 static struct platform_device gta02_buttons_device = {
 502         .name = "gpio-keys",
 503         .id = -1,
 504         .dev = {
 505                 .platform_data = &gta02_buttons_pdata,
 506         },
 507 };
 508
 509 static void __init gta02_map_io(void)
 510 {
 511         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 512         s3c24xx_init_clocks(12000000);
 513         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 514 }
 515
 516
 517 /* These are the guys that don't need to be children of PMU. */
 518
 519 static struct platform_device *gta02_devices[] __initdata = {
 520         &s3c_device_ohci,
 521         &s3c_device_wdt,
 522         &s3c_device_sdi,
 523         &s3c_device_usbgadget,
 524         &s3c_device_nand,
 525         &gta02_nor_flash,
 526         &s3c24xx_pwm_device,
 527         &s3c_device_iis,
 528         &samsung_asoc_dma,
 529         &s3c_device_i2c0,
 530         &gta02_dfbmcs320_device,
 531         &gta02_buttons_device,
 532         &s3c_device_adc,
 533         &s3c_device_ts,
 534 };
 535
 536 /* These guys DO need to be children of PMU. */
 537
 538 static struct platform_device *gta02_devices_pmu_children[] = {
 539 };
 540
 541
 542 /*
 543  * This is called when pc50633 is probed, quite late in the day since it is an
 544  * I2C bus device.  Here we can define platform devices with the advantage that
 545  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 546  * resumed with their parent the pcf50633 still around.  All devices whose
 547  * operation depends on something from pcf50633 must have this relationship
 548  * made explicit like this, or suspend and resume will become an unreliable
 549  * hellworld.
 550  */
 551
 552 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 553 {
 554         int n;
 555
 556         /* Grab a copy of the now probed PMU pointer. */
 557         gta02_pcf = pcf;
 558
 559         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 560                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 561
 562         platform_add_devices(gta02_devices_pmu_children,
 563                              ARRAY_SIZE(gta02_devices_pmu_children));
 564 }
 565
 566 static void gta02_poweroff(void)
 567 {
 568         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 569 }
 570
 571 static void __init gta02_machine_init(void)
 572 {
 573         /* Set the panic callback to turn AUX LED on or off. */
 574         panic_blink = gta02_panic_blink;
 575
 576         s3c_pm_init();
 577
 578 #ifdef CONFIG_CHARGER_PCF50633
 579         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 580 #endif
 581
 582         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 583         s3c24xx_ts_set_platdata(&gta02_ts_info);
 584         s3c_ohci_set_platdata(&gta02_usb_info);
 585         s3c_nand_set_platdata(&gta02_nand_info);
 586         s3c_i2c0_set_platdata(NULL);
 587
 588         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 589
 590         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 591         pm_power_off = gta02_poweroff;
 592
 593         regulator_has_full_constraints();
 594 }
 595
 596
 597 MACHINE_START(NEO1973_GTA02, "GTA02")
 598         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 599         .atag_offset    = 0x100,
 600         .map_io         = gta02_map_io,
 601         .init_irq       = s3c24xx_init_irq,
 602         .init_machine   = gta02_machine_init,
 603         .timer          = &s3c24xx_timer,
 604         .restart        = s3c244x_restart,
 605 MACHINE_END