arch/arm/mach-s3c24xx/mach-gta02.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   4 //
   5 // Copyright (C) 2006-2009 by Openmoko, Inc.
   6 // Authors: Harald Welte <laforge@openmoko.org>
   7 //          Andy Green <andy@openmoko.org>
   8 //          Werner Almesberger <werner@openmoko.org>
   9 // All rights reserved.
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/delay.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/gpio.h>
  19 #include <linux/gpio_keys.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/serial_s3c.h>
  24 #include <linux/input.h>
  25 #include <linux/io.h>
  26 #include <linux/i2c.h>
  27
  28 #include <linux/mmc/host.h>
  29
  30 #include <linux/mfd/pcf50633/adc.h>
  31 #include <linux/mfd/pcf50633/backlight.h>
  32 #include <linux/mfd/pcf50633/core.h>
  33 #include <linux/mfd/pcf50633/gpio.h>
  34 #include <linux/mfd/pcf50633/mbc.h>
  35 #include <linux/mfd/pcf50633/pmic.h>
  36
  37 #include <linux/mtd/mtd.h>
  38 #include <linux/mtd/rawnand.h>
  39 #include <linux/mtd/nand_ecc.h>
  40 #include <linux/mtd/partitions.h>
  41 #include <linux/mtd/physmap.h>
  42
  43 #include <linux/regulator/machine.h>
  44
  45 #include <linux/spi/spi.h>
  46 #include <linux/spi/s3c24xx.h>
  47
  48 #include <asm/irq.h>
  49 #include <asm/mach-types.h>
  50 #include <asm/mach/arch.h>
  51 #include <asm/mach/map.h>
  52 #include <asm/mach/irq.h>
  53
  54 #include <linux/platform_data/i2c-s3c2410.h>
  55 #include <linux/platform_data/mtd-nand-s3c2410.h>
  56 #include <linux/platform_data/touchscreen-s3c2410.h>
  57 #include <linux/platform_data/usb-ohci-s3c2410.h>
  58 #include <linux/platform_data/usb-s3c2410_udc.h>
  59
  60 #include <mach/fb.h>
  61 #include <mach/hardware.h>
  62 #include <mach/regs-gpio.h>
  63 #include <mach/regs-irq.h>
  64 #include <mach/gpio-samsung.h>
  65
  66 #include <plat/cpu.h>
  67 #include <plat/devs.h>
  68 #include <plat/gpio-cfg.h>
  69 #include <plat/pm.h>
  70 #include <plat/samsung-time.h>
  71
  72 #include "common.h"
  73 #include "gta02.h"
  74
  75 static struct pcf50633 *gta02_pcf;
  76
  77 /*
  78  * This gets called frequently when we paniced.
  79  */
  80
  81 static long gta02_panic_blink(int state)
  82 {
  83         long delay = 0;
  84         char led;
  85
  86         led = (state) ? 1 : 0;
  87         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
  88
  89         return delay;
  90 }
  91
  92
  93 static struct map_desc gta02_iodesc[] __initdata = {
  94         {
  95                 .virtual        = 0xe0000000,
  96                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
  97                 .length         = SZ_1M,
  98                 .type           = MT_DEVICE
  99         },
 100 };
 101
 102 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 103 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 104 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 105
 106 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 107         [0] = {
 108                 .hwport         = 0,
 109                 .flags          = 0,
 110                 .ucon           = UCON,
 111                 .ulcon          = ULCON,
 112                 .ufcon          = UFCON,
 113         },
 114         [1] = {
 115                 .hwport         = 1,
 116                 .flags          = 0,
 117                 .ucon           = UCON,
 118                 .ulcon          = ULCON,
 119                 .ufcon          = UFCON,
 120         },
 121         [2] = {
 122                 .hwport         = 2,
 123                 .flags          = 0,
 124                 .ucon           = UCON,
 125                 .ulcon          = ULCON,
 126                 .ufcon          = UFCON,
 127         },
 128 };
 129
 130 #ifdef CONFIG_CHARGER_PCF50633
 131 /*
 132  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 133  * We use this to recognize that we can pull 1A from the USB socket.
 134  *
 135  * These constants are the measured pcf50633 ADC levels with the 1A
 136  * charger / 48K resistor, and with no pulldown resistor.
 137  */
 138
 139 #define ADC_NOM_CHG_DETECT_1A 6
 140 #define ADC_NOM_CHG_DETECT_USB 43
 141
 142 #ifdef CONFIG_PCF50633_ADC
 143 static void
 144 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 145 {
 146         int  ma;
 147
 148         /* Interpret charger type */
 149         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 150
 151                 /*
 152                  * Sanity - stop GPO driving out now that we have a 1A charger
 153                  * GPO controls USB Host power generation on GTA02
 154                  */
 155                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 156
 157                 ma = 1000;
 158         } else
 159                 ma = 100;
 160
 161         pcf50633_mbc_usb_curlim_set(pcf, ma);
 162 }
 163 #endif
 164
 165 static struct delayed_work gta02_charger_work;
 166 static int gta02_usb_vbus_draw;
 167
 168 static void gta02_charger_worker(struct work_struct *work)
 169 {
 170         if (gta02_usb_vbus_draw) {
 171                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 172                 return;
 173         }
 174
 175 #ifdef CONFIG_PCF50633_ADC
 176         pcf50633_adc_async_read(gta02_pcf,
 177                                 PCF50633_ADCC1_MUX_ADCIN1,
 178                                 PCF50633_ADCC1_AVERAGE_16,
 179                                 gta02_configure_pmu_for_charger,
 180                                 NULL);
 181 #else
 182         /*
 183          * If the PCF50633 ADC is disabled we fallback to a
 184          * 100mA limit for safety.
 185          */
 186         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 187 #endif
 188 }
 189
 190 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 191
 192 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 193 {
 194         if (irq == PCF50633_IRQ_USBINS) {
 195                 schedule_delayed_work(&gta02_charger_work,
 196                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 197
 198                 return;
 199         }
 200
 201         if (irq == PCF50633_IRQ_USBREM) {
 202                 cancel_delayed_work_sync(&gta02_charger_work);
 203                 gta02_usb_vbus_draw = 0;
 204         }
 205 }
 206
 207 static void gta02_udc_vbus_draw(unsigned int ma)
 208 {
 209         if (!gta02_pcf)
 210                 return;
 211
 212         gta02_usb_vbus_draw = ma;
 213
 214         schedule_delayed_work(&gta02_charger_work,
 215                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 216 }
 217 #else /* !CONFIG_CHARGER_PCF50633 */
 218 #define gta02_pmu_event_callback        NULL
 219 #define gta02_udc_vbus_draw             NULL
 220 #endif
 221
 222 /*
 223  * This is called when pc50633 is probed, unfortunately quite late in the
 224  * day since it is an I2C bus device. Here we can belatedly define some
 225  * platform devices with the advantage that we can mark the pcf50633 as the
 226  * parent. This makes them get suspended and resumed with their parent
 227  * the pcf50633 still around.
 228  */
 229
 230 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 231
 232
 233 static char *gta02_batteries[] = {
 234         "battery",
 235 };
 236
 237 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 238         .default_brightness = 0x3f,
 239         .default_brightness_limit = 0,
 240         .ramp_time = 5,
 241 };
 242
 243 static struct pcf50633_platform_data gta02_pcf_pdata = {
 244         .resumers = {
 245                 [0] =   PCF50633_INT1_USBINS |
 246                         PCF50633_INT1_USBREM |
 247                         PCF50633_INT1_ALARM,
 248                 [1] =   PCF50633_INT2_ONKEYF,
 249                 [2] =   PCF50633_INT3_ONKEY1S,
 250                 [3] =   PCF50633_INT4_LOWSYS |
 251                         PCF50633_INT4_LOWBAT |
 252                         PCF50633_INT4_HIGHTMP,
 253         },
 254
 255         .batteries = gta02_batteries,
 256         .num_batteries = ARRAY_SIZE(gta02_batteries),
 257
 258         .charger_reference_current_ma = 1000,
 259
 260         .backlight_data = &gta02_backlight_data,
 261
 262         .reg_init_data = {
 263                 [PCF50633_REGULATOR_AUTO] = {
 264                         .constraints = {
 265                                 .min_uV = 3300000,
 266                                 .max_uV = 3300000,
 267                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 268                                 .always_on = 1,
 269                                 .apply_uV = 1,
 270                         },
 271                 },
 272                 [PCF50633_REGULATOR_DOWN1] = {
 273                         .constraints = {
 274                                 .min_uV = 1300000,
 275                                 .max_uV = 1600000,
 276                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 277                                 .always_on = 1,
 278                                 .apply_uV = 1,
 279                         },
 280                 },
 281                 [PCF50633_REGULATOR_DOWN2] = {
 282                         .constraints = {
 283                                 .min_uV = 1800000,
 284                                 .max_uV = 1800000,
 285                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 286                                 .apply_uV = 1,
 287                                 .always_on = 1,
 288                         },
 289                 },
 290                 [PCF50633_REGULATOR_HCLDO] = {
 291                         .constraints = {
 292                                 .min_uV = 2000000,
 293                                 .max_uV = 3300000,
 294                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 295                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 296                                                 REGULATOR_CHANGE_STATUS,
 297                         },
 298                 },
 299                 [PCF50633_REGULATOR_LDO1] = {
 300                         .constraints = {
 301                                 .min_uV = 3300000,
 302                                 .max_uV = 3300000,
 303                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 304                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 305                                 .apply_uV = 1,
 306                         },
 307                 },
 308                 [PCF50633_REGULATOR_LDO2] = {
 309                         .constraints = {
 310                                 .min_uV = 3300000,
 311                                 .max_uV = 3300000,
 312                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 313                                 .apply_uV = 1,
 314                         },
 315                 },
 316                 [PCF50633_REGULATOR_LDO3] = {
 317                         .constraints = {
 318                                 .min_uV = 3000000,
 319                                 .max_uV = 3000000,
 320                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 321                                 .apply_uV = 1,
 322                         },
 323                 },
 324                 [PCF50633_REGULATOR_LDO4] = {
 325                         .constraints = {
 326                                 .min_uV = 3200000,
 327                                 .max_uV = 3200000,
 328                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 329                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 330                                 .apply_uV = 1,
 331                         },
 332                 },
 333                 [PCF50633_REGULATOR_LDO5] = {
 334                         .constraints = {
 335                                 .min_uV = 3000000,
 336                                 .max_uV = 3000000,
 337                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 338                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 339                                 .apply_uV = 1,
 340                         },
 341                 },
 342                 [PCF50633_REGULATOR_LDO6] = {
 343                         .constraints = {
 344                                 .min_uV = 3000000,
 345                                 .max_uV = 3000000,
 346                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 347                         },
 348                 },
 349                 [PCF50633_REGULATOR_MEMLDO] = {
 350                         .constraints = {
 351                                 .min_uV = 1800000,
 352                                 .max_uV = 1800000,
 353                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 354                         },
 355                 },
 356
 357         },
 358         .probe_done = gta02_pmu_attach_child_devices,
 359         .mbc_event_callback = gta02_pmu_event_callback,
 360 };
 361
 362
 363 /* NOR Flash. */
 364
 365 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 366 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 367
 368 static struct physmap_flash_data gta02_nor_flash_data = {
 369         .width          = 2,
 370 };
 371
 372 static struct resource gta02_nor_flash_resource =
 373         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 374
 375 static struct platform_device gta02_nor_flash = {
 376         .name           = "physmap-flash",
 377         .id             = 0,
 378         .dev            = {
 379                 .platform_data  = &gta02_nor_flash_data,
 380         },
 381         .resource       = &gta02_nor_flash_resource,
 382         .num_resources  = 1,
 383 };
 384
 385
 386 static struct platform_device s3c24xx_pwm_device = {
 387         .name           = "s3c24xx_pwm",
 388         .num_resources  = 0,
 389 };
 390
 391 static struct platform_device gta02_dfbmcs320_device = {
 392         .name = "dfbmcs320",
 393 };
 394
 395 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 396         {
 397                 I2C_BOARD_INFO("pcf50633", 0x73),
 398                 .irq = GTA02_IRQ_PCF50633,
 399                 .platform_data = &gta02_pcf_pdata,
 400         },
 401         {
 402                 I2C_BOARD_INFO("wm8753", 0x1a),
 403         },
 404 };
 405
 406 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 407         [0] = {
 408                 /*
 409                  * This name is also hard-coded in the boot loaders, so
 410                  * changing it would would require all users to upgrade
 411                  * their boot loaders, some of which are stored in a NOR
 412                  * that is considered to be immutable.
 413                  */
 414                 .name           = "neo1973-nand",
 415                 .nr_chips       = 1,
 416                 .flash_bbt      = 1,
 417         },
 418 };
 419
 420 /*
 421  * Choose a set of timings derived from S3C@2442B MCP54
 422  * data sheet (K5D2G13ACM-D075 MCP Memory).
 423  */
 424
 425 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 426         .tacls          = 0,
 427         .twrph0         = 25,
 428         .twrph1         = 15,
 429         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 430         .sets           = gta02_nand_sets,
 431         .ecc_mode       = NAND_ECC_SOFT,
 432 };
 433
 434
 435 /* Get PMU to set USB current limit accordingly. */
 436 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 437         .vbus_draw      = gta02_udc_vbus_draw,
 438         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 439 };
 440
 441 /* USB */
 442 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 443         .port[0]        = {
 444                 .flags  = S3C_HCDFLG_USED,
 445         },
 446         .port[1]        = {
 447                 .flags  = 0,
 448         },
 449 };
 450
 451 /* Touchscreen */
 452 static struct s3c2410_ts_mach_info gta02_ts_info = {
 453         .delay                  = 10000,
 454         .presc                  = 0xff, /* slow as we can go */
 455         .oversampling_shift     = 2,
 456 };
 457
 458 /* Buttons */
 459 static struct gpio_keys_button gta02_buttons[] = {
 460         {
 461                 .gpio = GTA02_GPIO_AUX_KEY,
 462                 .code = KEY_PHONE,
 463                 .desc = "Aux",
 464                 .type = EV_KEY,
 465                 .debounce_interval = 100,
 466         },
 467         {
 468                 .gpio = GTA02_GPIO_HOLD_KEY,
 469                 .code = KEY_PAUSE,
 470                 .desc = "Hold",
 471                 .type = EV_KEY,
 472                 .debounce_interval = 100,
 473         },
 474 };
 475
 476 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 477         .buttons = gta02_buttons,
 478         .nbuttons = ARRAY_SIZE(gta02_buttons),
 479 };
 480
 481 static struct platform_device gta02_buttons_device = {
 482         .name = "gpio-keys",
 483         .id = -1,
 484         .dev = {
 485                 .platform_data = &gta02_buttons_pdata,
 486         },
 487 };
 488
 489 static void __init gta02_map_io(void)
 490 {
 491         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 492         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 493         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 494 }
 495
 496
 497 /* These are the guys that don't need to be children of PMU. */
 498
 499 static struct platform_device *gta02_devices[] __initdata = {
 500         &s3c_device_ohci,
 501         &s3c_device_wdt,
 502         &s3c_device_sdi,
 503         &s3c_device_usbgadget,
 504         &s3c_device_nand,
 505         &gta02_nor_flash,
 506         &s3c24xx_pwm_device,
 507         &s3c_device_iis,
 508         &s3c_device_i2c0,
 509         &gta02_dfbmcs320_device,
 510         &gta02_buttons_device,
 511         &s3c_device_adc,
 512         &s3c_device_ts,
 513 };
 514
 515 /* These guys DO need to be children of PMU. */
 516
 517 static struct platform_device *gta02_devices_pmu_children[] = {
 518 };
 519
 520
 521 /*
 522  * This is called when pc50633 is probed, quite late in the day since it is an
 523  * I2C bus device.  Here we can define platform devices with the advantage that
 524  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 525  * resumed with their parent the pcf50633 still around.  All devices whose
 526  * operation depends on something from pcf50633 must have this relationship
 527  * made explicit like this, or suspend and resume will become an unreliable
 528  * hellworld.
 529  */
 530
 531 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 532 {
 533         int n;
 534
 535         /* Grab a copy of the now probed PMU pointer. */
 536         gta02_pcf = pcf;
 537
 538         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 539                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 540
 541         platform_add_devices(gta02_devices_pmu_children,
 542                              ARRAY_SIZE(gta02_devices_pmu_children));
 543 }
 544
 545 static void gta02_poweroff(void)
 546 {
 547         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 548 }
 549
 550 static void __init gta02_machine_init(void)
 551 {
 552         /* Set the panic callback to turn AUX LED on or off. */
 553         panic_blink = gta02_panic_blink;
 554
 555         s3c_pm_init();
 556
 557 #ifdef CONFIG_CHARGER_PCF50633
 558         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 559 #endif
 560
 561         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 562         s3c24xx_ts_set_platdata(&gta02_ts_info);
 563         s3c_ohci_set_platdata(&gta02_usb_info);
 564         s3c_nand_set_platdata(&gta02_nand_info);
 565         s3c_i2c0_set_platdata(NULL);
 566
 567         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 568
 569         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 570         pm_power_off = gta02_poweroff;
 571
 572         regulator_has_full_constraints();
 573 }
 574
 575 static void __init gta02_init_time(void)
 576 {
 577         s3c2442_init_clocks(12000000);
 578         samsung_timer_init();
 579 }
 580
 581 MACHINE_START(NEO1973_GTA02, "GTA02")
 582         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 583         .atag_offset    = 0x100,
 584         .map_io         = gta02_map_io,
 585         .init_irq       = s3c2442_init_irq,
 586         .init_machine   = gta02_machine_init,
 587         .init_time      = gta02_init_time,
 588 MACHINE_END