arch/arm/mach-s3c2442/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/backlight.h>
  53 #include <linux/regulator/machine.h>
  54
  55 #include <linux/mfd/pcf50633/core.h>
  56 #include <linux/mfd/pcf50633/mbc.h>
  57 #include <linux/mfd/pcf50633/adc.h>
  58 #include <linux/mfd/pcf50633/gpio.h>
  59 #include <linux/mfd/pcf50633/pmic.h>
  60
  61 #include <asm/mach/arch.h>
  62 #include <asm/mach/map.h>
  63 #include <asm/mach/irq.h>
  64
  65 #include <asm/irq.h>
  66 #include <asm/mach-types.h>
  67
  68 #include <mach/regs-irq.h>
  69 #include <mach/regs-gpio.h>
  70 #include <mach/regs-gpioj.h>
  71 #include <mach/fb.h>
  72
  73 #include <mach/spi.h>
  74 #include <mach/spi-gpio.h>
  75 #include <plat/usb-control.h>
  76 #include <mach/regs-mem.h>
  77 #include <mach/hardware.h>
  78
  79 #include <mach/gta02.h>
  80
  81 #include <plat/regs-serial.h>
  82 #include <plat/nand.h>
  83 #include <plat/devs.h>
  84 #include <plat/cpu.h>
  85 #include <plat/pm.h>
  86 #include <plat/udc.h>
  87 #include <plat/gpio-cfg.h>
  88 #include <plat/iic.h>
  89
  90 static struct pcf50633 *gta02_pcf;
  91
  92 /*
  93  * This gets called every 1ms when we paniced.
  94  */
  95
  96 static long gta02_panic_blink(long count)
  97 {
  98         long delay = 0;
  99         static long last_blink;
 100         static char led;
 101
 102         /* Fast blink: 200ms period. */
 103         if (count - last_blink < 100)
 104                 return 0;
 105
 106         led ^= 1;
 107         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 108
 109         last_blink = count;
 110
 111         return delay;
 112 }
 113
 114
 115 static struct map_desc gta02_iodesc[] __initdata = {
 116         {
 117                 .virtual        = 0xe0000000,
 118                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 119                 .length         = SZ_1M,
 120                 .type           = MT_DEVICE
 121         },
 122 };
 123
 124 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 125 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 126 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 127
 128 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 129         [0] = {
 130                 .hwport         = 0,
 131                 .flags          = 0,
 132                 .ucon           = UCON,
 133                 .ulcon          = ULCON,
 134                 .ufcon          = UFCON,
 135         },
 136         [1] = {
 137                 .hwport         = 1,
 138                 .flags          = 0,
 139                 .ucon           = UCON,
 140                 .ulcon          = ULCON,
 141                 .ufcon          = UFCON,
 142         },
 143         [2] = {
 144                 .hwport         = 2,
 145                 .flags          = 0,
 146                 .ucon           = UCON,
 147                 .ulcon          = ULCON,
 148                 .ufcon          = UFCON,
 149         },
 150 };
 151
 152 #ifdef CONFIG_CHARGER_PCF50633
 153 /*
 154  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 155  * We use this to recognize that we can pull 1A from the USB socket.
 156  *
 157  * These constants are the measured pcf50633 ADC levels with the 1A
 158  * charger / 48K resistor, and with no pulldown resistor.
 159  */
 160
 161 #define ADC_NOM_CHG_DETECT_1A 6
 162 #define ADC_NOM_CHG_DETECT_USB 43
 163
 164 static void
 165 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 166 {
 167         int  ma;
 168
 169         /* Interpret charger type */
 170         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 171
 172                 /*
 173                  * Sanity - stop GPO driving out now that we have a 1A charger
 174                  * GPO controls USB Host power generation on GTA02
 175                  */
 176                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 177
 178                 ma = 1000;
 179         } else
 180                 ma = 100;
 181
 182         pcf50633_mbc_usb_curlim_set(pcf, ma);
 183 }
 184
 185 static struct delayed_work gta02_charger_work;
 186 static int gta02_usb_vbus_draw;
 187
 188 static void gta02_charger_worker(struct work_struct *work)
 189 {
 190         if (gta02_usb_vbus_draw) {
 191                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 192                 return;
 193         }
 194
 195 #ifdef CONFIG_PCF50633_ADC
 196         pcf50633_adc_async_read(gta02_pcf,
 197                                 PCF50633_ADCC1_MUX_ADCIN1,
 198                                 PCF50633_ADCC1_AVERAGE_16,
 199                                 gta02_configure_pmu_for_charger,
 200                                 NULL);
 201 #else
 202         /*
 203          * If the PCF50633 ADC is disabled we fallback to a
 204          * 100mA limit for safety.
 205          */
 206         pcf50633_mbc_usb_curlim_set(pcf, 100);
 207 #endif
 208 }
 209
 210 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 211
 212 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 213 {
 214         if (irq == PCF50633_IRQ_USBINS) {
 215                 schedule_delayed_work(&gta02_charger_work,
 216                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 217
 218                 return;
 219         }
 220
 221         if (irq == PCF50633_IRQ_USBREM) {
 222                 cancel_delayed_work_sync(&gta02_charger_work);
 223                 gta02_usb_vbus_draw = 0;
 224         }
 225 }
 226
 227 static void gta02_udc_vbus_draw(unsigned int ma)
 228 {
 229         if (!gta02_pcf)
 230                 return;
 231
 232         gta02_usb_vbus_draw = ma;
 233
 234         schedule_delayed_work(&gta02_charger_work,
 235                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 236 }
 237 #else /* !CONFIG_CHARGER_PCF50633 */
 238 #define gta02_pmu_event_callback        NULL
 239 #define gta02_udc_vbus_draw             NULL
 240 #endif
 241
 242 /*
 243  * This is called when pc50633 is probed, unfortunately quite late in the
 244  * day since it is an I2C bus device. Here we can belatedly define some
 245  * platform devices with the advantage that we can mark the pcf50633 as the
 246  * parent. This makes them get suspended and resumed with their parent
 247  * the pcf50633 still around.
 248  */
 249
 250 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 251
 252
 253 static char *gta02_batteries[] = {
 254         "battery",
 255 };
 256
 257 struct pcf50633_platform_data gta02_pcf_pdata = {
 258         .resumers = {
 259                 [0] =   PCF50633_INT1_USBINS |
 260                         PCF50633_INT1_USBREM |
 261                         PCF50633_INT1_ALARM,
 262                 [1] =   PCF50633_INT2_ONKEYF,
 263                 [2] =   PCF50633_INT3_ONKEY1S,
 264                 [3] =   PCF50633_INT4_LOWSYS |
 265                         PCF50633_INT4_LOWBAT |
 266                         PCF50633_INT4_HIGHTMP,
 267         },
 268
 269         .batteries = gta02_batteries,
 270         .num_batteries = ARRAY_SIZE(gta02_batteries),
 271
 272         .charger_reference_current_ma = 1000,
 273
 274         .reg_init_data = {
 275                 [PCF50633_REGULATOR_AUTO] = {
 276                         .constraints = {
 277                                 .min_uV = 3300000,
 278                                 .max_uV = 3300000,
 279                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 280                                 .always_on = 1,
 281                                 .apply_uV = 1,
 282                                 .state_mem = {
 283                                         .enabled = 1,
 284                                 },
 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                                 .state_mem = {
 304                                         .enabled = 1,
 305                                 },
 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                                 .always_on = 1,
 315                         },
 316                 },
 317                 [PCF50633_REGULATOR_LDO1] = {
 318                         .constraints = {
 319                                 .min_uV = 3300000,
 320                                 .max_uV = 3300000,
 321                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 322                                 .apply_uV = 1,
 323                                 .state_mem = {
 324                                         .enabled = 0,
 325                                 },
 326                         },
 327                 },
 328                 [PCF50633_REGULATOR_LDO2] = {
 329                         .constraints = {
 330                                 .min_uV = 3300000,
 331                                 .max_uV = 3300000,
 332                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 333                                 .apply_uV = 1,
 334                         },
 335                 },
 336                 [PCF50633_REGULATOR_LDO3] = {
 337                         .constraints = {
 338                                 .min_uV = 3000000,
 339                                 .max_uV = 3000000,
 340                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 341                                 .apply_uV = 1,
 342                         },
 343                 },
 344                 [PCF50633_REGULATOR_LDO4] = {
 345                         .constraints = {
 346                                 .min_uV = 3200000,
 347                                 .max_uV = 3200000,
 348                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 349                                 .apply_uV = 1,
 350                         },
 351                 },
 352                 [PCF50633_REGULATOR_LDO5] = {
 353                         .constraints = {
 354                                 .min_uV = 3000000,
 355                                 .max_uV = 3000000,
 356                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 357                                 .apply_uV = 1,
 358                                 .state_mem = {
 359                                         .enabled = 1,
 360                                 },
 361                         },
 362                 },
 363                 [PCF50633_REGULATOR_LDO6] = {
 364                         .constraints = {
 365                                 .min_uV = 3000000,
 366                                 .max_uV = 3000000,
 367                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 368                         },
 369                 },
 370                 [PCF50633_REGULATOR_MEMLDO] = {
 371                         .constraints = {
 372                                 .min_uV = 1800000,
 373                                 .max_uV = 1800000,
 374                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 375                                 .state_mem = {
 376                                         .enabled = 1,
 377                                 },
 378                         },
 379                 },
 380
 381         },
 382         .probe_done = gta02_pmu_attach_child_devices,
 383         .mbc_event_callback = gta02_pmu_event_callback,
 384 };
 385
 386
 387 /* NOR Flash. */
 388
 389 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 390 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 391
 392 static struct physmap_flash_data gta02_nor_flash_data = {
 393         .width          = 2,
 394 };
 395
 396 static struct resource gta02_nor_flash_resource = {
 397         .start          = GTA02_FLASH_BASE,
 398         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 399         .flags          = IORESOURCE_MEM,
 400 };
 401
 402 static struct platform_device gta02_nor_flash = {
 403         .name           = "physmap-flash",
 404         .id             = 0,
 405         .dev            = {
 406                 .platform_data  = &gta02_nor_flash_data,
 407         },
 408         .resource       = &gta02_nor_flash_resource,
 409         .num_resources  = 1,
 410 };
 411
 412
 413 struct platform_device s3c24xx_pwm_device = {
 414         .name           = "s3c24xx_pwm",
 415         .num_resources  = 0,
 416 };
 417
 418 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 419         {
 420                 I2C_BOARD_INFO("pcf50633", 0x73),
 421                 .irq = GTA02_IRQ_PCF50633,
 422                 .platform_data = &gta02_pcf_pdata,
 423         },
 424         {
 425                 I2C_BOARD_INFO("wm8753", 0x1a),
 426         },
 427 };
 428
 429 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 430         [0] = {
 431                 /*
 432                  * This name is also hard-coded in the boot loaders, so
 433                  * changing it would would require all users to upgrade
 434                  * their boot loaders, some of which are stored in a NOR
 435                  * that is considered to be immutable.
 436                  */
 437                 .name           = "neo1973-nand",
 438                 .nr_chips       = 1,
 439                 .flash_bbt      = 1,
 440         },
 441 };
 442
 443 /*
 444  * Choose a set of timings derived from S3C@2442B MCP54
 445  * data sheet (K5D2G13ACM-D075 MCP Memory).
 446  */
 447
 448 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 449         .tacls          = 0,
 450         .twrph0         = 25,
 451         .twrph1         = 15,
 452         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 453         .sets           = gta02_nand_sets,
 454 };
 455
 456
 457 static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
 458 {
 459         switch (cmd) {
 460         case S3C2410_UDC_P_ENABLE:
 461                 pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
 462                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
 463                 break;
 464         case S3C2410_UDC_P_DISABLE:
 465                 pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
 466                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
 467                 break;
 468         case S3C2410_UDC_P_RESET:
 469                 pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
 470                 /* FIXME: Do something here. */
 471         }
 472 }
 473
 474 /* Get PMU to set USB current limit accordingly. */
 475 static struct s3c2410_udc_mach_info gta02_udc_cfg = {
 476         .vbus_draw      = gta02_udc_vbus_draw,
 477         .udc_command    = gta02_udc_command,
 478
 479 };
 480
 481
 482
 483 static void gta02_bl_set_intensity(int intensity)
 484 {
 485         struct pcf50633 *pcf = gta02_pcf;
 486         int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
 487
 488         /* We map 8-bit intensity to 6-bit intensity in hardware. */
 489         intensity >>= 2;
 490
 491         /*
 492          * This can happen during, eg, print of panic on blanked console,
 493          * but we can't service i2c without interrupts active, so abort.
 494          */
 495         if (in_atomic()) {
 496                 printk(KERN_ERR "gta02_bl_set_intensity called while atomic\n");
 497                 return;
 498         }
 499
 500         old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
 501         if (intensity == old_intensity)
 502                 return;
 503
 504         /* We can't do this anywhere else. */
 505         pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 5);
 506
 507         if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
 508                 old_intensity = 0;
 509
 510         /*
 511          * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
 512          * if seen, you have to re-enable the LED unit.
 513          */
 514         if (!intensity || !old_intensity)
 515                 pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
 516
 517         /* Illegal to set LEDOUT to 0. */
 518         if (!intensity)
 519                 pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
 520         else
 521                 pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
 522                                           intensity);
 523
 524         if (intensity)
 525                 pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
 526
 527 }
 528
 529 static struct generic_bl_info gta02_bl_info = {
 530         .name                   = "gta02-bl",
 531         .max_intensity          = 0xff,
 532         .default_intensity      = 0xff,
 533         .set_bl_intensity       = gta02_bl_set_intensity,
 534 };
 535
 536 static struct platform_device gta02_bl_dev = {
 537         .name                   = "generic-bl",
 538         .id                     = 1,
 539         .dev = {
 540                 .platform_data = &gta02_bl_info,
 541         },
 542 };
 543
 544
 545
 546 /* USB */
 547 static struct s3c2410_hcd_info gta02_usb_info = {
 548         .port[0]        = {
 549                 .flags  = S3C_HCDFLG_USED,
 550         },
 551         .port[1]        = {
 552                 .flags  = 0,
 553         },
 554 };
 555
 556
 557 static void __init gta02_map_io(void)
 558 {
 559         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 560         s3c24xx_init_clocks(12000000);
 561         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 562 }
 563
 564
 565 /* These are the guys that don't need to be children of PMU. */
 566
 567 static struct platform_device *gta02_devices[] __initdata = {
 568         &s3c_device_usb,
 569         &s3c_device_wdt,
 570         &s3c_device_sdi,
 571         &s3c_device_usbgadget,
 572         &s3c_device_nand,
 573         &gta02_nor_flash,
 574         &s3c24xx_pwm_device,
 575         &s3c_device_iis,
 576         &s3c_device_i2c0,
 577 };
 578
 579 /* These guys DO need to be children of PMU. */
 580
 581 static struct platform_device *gta02_devices_pmu_children[] = {
 582         &gta02_bl_dev,
 583 };
 584
 585
 586 /*
 587  * This is called when pc50633 is probed, quite late in the day since it is an
 588  * I2C bus device.  Here we can define platform devices with the advantage that
 589  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 590  * resumed with their parent the pcf50633 still around.  All devices whose
 591  * operation depends on something from pcf50633 must have this relationship
 592  * made explicit like this, or suspend and resume will become an unreliable
 593  * hellworld.
 594  */
 595
 596 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 597 {
 598         int n;
 599
 600         /* Grab a copy of the now probed PMU pointer. */
 601         gta02_pcf = pcf;
 602
 603         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 604                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 605
 606         platform_add_devices(gta02_devices_pmu_children,
 607                              ARRAY_SIZE(gta02_devices_pmu_children));
 608 }
 609
 610 static void gta02_poweroff(void)
 611 {
 612         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 613 }
 614
 615 static void __init gta02_machine_init(void)
 616 {
 617         /* Set the panic callback to make AUX LED blink at ~5Hz. */
 618         panic_blink = gta02_panic_blink;
 619
 620         s3c_pm_init();
 621
 622 #ifdef CONFIG_CHARGER_PCF50633
 623         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 624 #endif
 625
 626         s3c_device_usb.dev.platform_data = &gta02_usb_info;
 627
 628         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 629         s3c_nand_set_platdata(&gta02_nand_info);
 630         s3c_i2c0_set_platdata(NULL);
 631
 632         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 633
 634         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 635         pm_power_off = gta02_poweroff;
 636 }
 637
 638
 639 MACHINE_START(NEO1973_GTA02, "GTA02")
 640         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 641         .phys_io        = S3C2410_PA_UART,
 642         .io_pg_offst    = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
 643         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 644         .map_io         = gta02_map_io,
 645         .init_irq       = s3c24xx_init_irq,
 646         .init_machine   = gta02_machine_init,
 647         .timer          = &s3c24xx_timer,
 648 MACHINE_END