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   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         .reg_init_data = {
 272                 [PCF50633_REGULATOR_AUTO] = {
 273                         .constraints = {
 274                                 .min_uV = 3300000,
 275                                 .max_uV = 3300000,
 276                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 277                                 .always_on = 1,
 278                                 .apply_uV = 1,
 279                                 .state_mem = {
 280                                         .enabled = 1,
 281                                 },
 282                         },
 283                 },
 284                 [PCF50633_REGULATOR_DOWN1] = {
 285                         .constraints = {
 286                                 .min_uV = 1300000,
 287                                 .max_uV = 1600000,
 288                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 289                                 .always_on = 1,
 290                                 .apply_uV = 1,
 291                         },
 292                 },
 293                 [PCF50633_REGULATOR_DOWN2] = {
 294                         .constraints = {
 295                                 .min_uV = 1800000,
 296                                 .max_uV = 1800000,
 297                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 298                                 .apply_uV = 1,
 299                                 .always_on = 1,
 300                                 .state_mem = {
 301                                         .enabled = 1,
 302                                 },
 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                                 .always_on = 1,
 312                         },
 313                 },
 314                 [PCF50633_REGULATOR_LDO1] = {
 315                         .constraints = {
 316                                 .min_uV = 3300000,
 317                                 .max_uV = 3300000,
 318                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 319                                 .apply_uV = 1,
 320                                 .state_mem = {
 321                                         .enabled = 0,
 322                                 },
 323                         },
 324                 },
 325                 [PCF50633_REGULATOR_LDO2] = {
 326                         .constraints = {
 327                                 .min_uV = 3300000,
 328                                 .max_uV = 3300000,
 329                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 330                                 .apply_uV = 1,
 331                         },
 332                 },
 333                 [PCF50633_REGULATOR_LDO3] = {
 334                         .constraints = {
 335                                 .min_uV = 3000000,
 336                                 .max_uV = 3000000,
 337                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 338                                 .apply_uV = 1,
 339                         },
 340                 },
 341                 [PCF50633_REGULATOR_LDO4] = {
 342                         .constraints = {
 343                                 .min_uV = 3200000,
 344                                 .max_uV = 3200000,
 345                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 346                                 .apply_uV = 1,
 347                         },
 348                 },
 349                 [PCF50633_REGULATOR_LDO5] = {
 350                         .constraints = {
 351                                 .min_uV = 3000000,
 352                                 .max_uV = 3000000,
 353                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 354                                 .apply_uV = 1,
 355                                 .state_mem = {
 356                                         .enabled = 1,
 357                                 },
 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                                 .state_mem = {
 373                                         .enabled = 1,
 374                                 },
 375                         },
 376                 },
 377
 378         },
 379         .probe_done = gta02_pmu_attach_child_devices,
 380         .mbc_event_callback = gta02_pmu_event_callback,
 381 };
 382
 383
 384 /* NOR Flash. */
 385
 386 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 387 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 388
 389 static struct physmap_flash_data gta02_nor_flash_data = {
 390         .width          = 2,
 391 };
 392
 393 static struct resource gta02_nor_flash_resource = {
 394         .start          = GTA02_FLASH_BASE,
 395         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 396         .flags          = IORESOURCE_MEM,
 397 };
 398
 399 static struct platform_device gta02_nor_flash = {
 400         .name           = "physmap-flash",
 401         .id             = 0,
 402         .dev            = {
 403                 .platform_data  = &gta02_nor_flash_data,
 404         },
 405         .resource       = &gta02_nor_flash_resource,
 406         .num_resources  = 1,
 407 };
 408
 409
 410 struct platform_device s3c24xx_pwm_device = {
 411         .name           = "s3c24xx_pwm",
 412         .num_resources  = 0,
 413 };
 414
 415 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 416         {
 417                 I2C_BOARD_INFO("pcf50633", 0x73),
 418                 .irq = GTA02_IRQ_PCF50633,
 419                 .platform_data = &gta02_pcf_pdata,
 420         },
 421         {
 422                 I2C_BOARD_INFO("wm8753", 0x1a),
 423         },
 424 };
 425
 426 static struct s3c2410_nand_set gta02_nand_sets[] = {
 427         [0] = {
 428                 /*
 429                  * This name is also hard-coded in the boot loaders, so
 430                  * changing it would would require all users to upgrade
 431                  * their boot loaders, some of which are stored in a NOR
 432                  * that is considered to be immutable.
 433                  */
 434                 .name           = "neo1973-nand",
 435                 .nr_chips       = 1,
 436                 .use_bbt        = 1,
 437                 .force_soft_ecc = 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 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 static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
 456 {
 457         switch (cmd) {
 458         case S3C2410_UDC_P_ENABLE:
 459                 pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
 460                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
 461                 break;
 462         case S3C2410_UDC_P_DISABLE:
 463                 pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
 464                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
 465                 break;
 466         case S3C2410_UDC_P_RESET:
 467                 pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
 468                 /* FIXME: Do something here. */
 469         }
 470 }
 471
 472 /* Get PMU to set USB current limit accordingly. */
 473 static struct s3c2410_udc_mach_info gta02_udc_cfg = {
 474         .vbus_draw      = gta02_udc_vbus_draw,
 475         .udc_command    = gta02_udc_command,
 476
 477 };
 478
 479
 480
 481 static void gta02_bl_set_intensity(int intensity)
 482 {
 483         struct pcf50633 *pcf = gta02_pcf;
 484         int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
 485
 486         /* We map 8-bit intensity to 6-bit intensity in hardware. */
 487         intensity >>= 2;
 488
 489         /*
 490          * This can happen during, eg, print of panic on blanked console,
 491          * but we can't service i2c without interrupts active, so abort.
 492          */
 493         if (in_atomic()) {
 494                 printk(KERN_ERR "gta02_bl_set_intensity called while atomic\n");
 495                 return;
 496         }
 497
 498         old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
 499         if (intensity == old_intensity)
 500                 return;
 501
 502         /* We can't do this anywhere else. */
 503         pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 5);
 504
 505         if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
 506                 old_intensity = 0;
 507
 508         /*
 509          * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
 510          * if seen, you have to re-enable the LED unit.
 511          */
 512         if (!intensity || !old_intensity)
 513                 pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
 514
 515         /* Illegal to set LEDOUT to 0. */
 516         if (!intensity)
 517                 pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
 518         else
 519                 pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
 520                                           intensity);
 521
 522         if (intensity)
 523                 pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
 524
 525 }
 526
 527 static struct generic_bl_info gta02_bl_info = {
 528         .name                   = "gta02-bl",
 529         .max_intensity          = 0xff,
 530         .default_intensity      = 0xff,
 531         .set_bl_intensity       = gta02_bl_set_intensity,
 532 };
 533
 534 static struct platform_device gta02_bl_dev = {
 535         .name                   = "generic-bl",
 536         .id                     = 1,
 537         .dev = {
 538                 .platform_data = &gta02_bl_info,
 539         },
 540 };
 541
 542
 543
 544 /* USB */
 545 static struct s3c2410_hcd_info gta02_usb_info = {
 546         .port[0]        = {
 547                 .flags  = S3C_HCDFLG_USED,
 548         },
 549         .port[1]        = {
 550                 .flags  = 0,
 551         },
 552 };
 553
 554
 555 static void __init gta02_map_io(void)
 556 {
 557         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 558         s3c24xx_init_clocks(12000000);
 559         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 560 }
 561
 562
 563 /* These are the guys that don't need to be children of PMU. */
 564
 565 static struct platform_device *gta02_devices[] __initdata = {
 566         &s3c_device_usb,
 567         &s3c_device_wdt,
 568         &s3c_device_sdi,
 569         &s3c_device_usbgadget,
 570         &s3c_device_nand,
 571         &gta02_nor_flash,
 572         &s3c24xx_pwm_device,
 573         &s3c_device_iis,
 574         &s3c_device_i2c0,
 575 };
 576
 577 /* These guys DO need to be children of PMU. */
 578
 579 static struct platform_device *gta02_devices_pmu_children[] = {
 580         &gta02_bl_dev,
 581 };
 582
 583
 584 /*
 585  * This is called when pc50633 is probed, quite late in the day since it is an
 586  * I2C bus device.  Here we can define platform devices with the advantage that
 587  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 588  * resumed with their parent the pcf50633 still around.  All devices whose
 589  * operation depends on something from pcf50633 must have this relationship
 590  * made explicit like this, or suspend and resume will become an unreliable
 591  * hellworld.
 592  */
 593
 594 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 595 {
 596         int n;
 597
 598         /* Grab a copy of the now probed PMU pointer. */
 599         gta02_pcf = pcf;
 600
 601         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 602                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 603
 604         platform_add_devices(gta02_devices_pmu_children,
 605                              ARRAY_SIZE(gta02_devices_pmu_children));
 606 }
 607
 608 static void gta02_poweroff(void)
 609 {
 610         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 611 }
 612
 613 static void __init gta02_machine_init(void)
 614 {
 615         /* Set the panic callback to make AUX LED blink at ~5Hz. */
 616         panic_blink = gta02_panic_blink;
 617
 618         s3c_pm_init();
 619
 620 #ifdef CONFIG_CHARGER_PCF50633
 621         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 622 #endif
 623
 624         s3c_device_usb.dev.platform_data = &gta02_usb_info;
 625         s3c_device_nand.dev.platform_data = &gta02_nand_info;
 626
 627         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 628         s3c_i2c0_set_platdata(NULL);
 629
 630         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 631
 632         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 633         pm_power_off = gta02_poweroff;
 634 }
 635
 636
 637 MACHINE_START(NEO1973_GTA02, "GTA02")
 638         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 639         .phys_io        = S3C2410_PA_UART,
 640         .io_pg_offst    = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
 641         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 642         .map_io         = gta02_map_io,
 643         .init_irq       = s3c24xx_init_irq,
 644         .init_machine   = gta02_machine_init,
 645         .timer          = &s3c24xx_timer,
 646 MACHINE_END