target/linux/s3c24xx/patches/0010-gta01-power_control.patch.patch

   1 From 0739383d85822b93831803abb207794c16eedd79 Mon Sep 17 00:00:00 2001
   2 From: mokopatches <mokopatches@openmoko.org>
   3 Date: Wed, 16 Jul 2008 14:44:48 +0100
   4 Subject: [PATCH] gta01-power_control.patch
   5  [PATCH] Neo1973 GPS / GSM / Bluetooth power control via sysfs
   6
   7 Signed-off-by: Harald Welte <laforge@openmoko.org>
   8 ---
   9  arch/arm/plat-s3c24xx/Makefile         |    1 +
  10  arch/arm/plat-s3c24xx/neo1973_pm_bt.c  |  152 +++++++++
  11  arch/arm/plat-s3c24xx/neo1973_pm_gps.c |  560 ++++++++++++++++++++++++++++++++
  12  arch/arm/plat-s3c24xx/neo1973_pm_gsm.c |  217 ++++++++++++
  13  4 files changed, 930 insertions(+), 0 deletions(-)
  14  create mode 100644 arch/arm/plat-s3c24xx/neo1973_pm_bt.c
  15  create mode 100644 arch/arm/plat-s3c24xx/neo1973_pm_gps.c
  16  create mode 100644 arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
  17
  18 diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
  19 index 131d202..6f43aca 100644
  20 --- a/arch/arm/plat-s3c24xx/Makefile
  21 +++ b/arch/arm/plat-s3c24xx/Makefile
  22 @@ -29,3 +29,4 @@ obj-$(CONFIG_PM)              += pm.o
  23  obj-$(CONFIG_PM)               += sleep.o
  24  obj-$(CONFIG_S3C2410_DMA)      += dma.o
  25  obj-$(CONFIG_MACH_SMDK)                += common-smdk.o
  26 +obj-$(CONFIG_MACH_NEO1973)     += neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
  27 diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_bt.c b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
  28 new file mode 100644
  29 index 0000000..b1af441
  30 --- /dev/null
  31 +++ b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
  32 @@ -0,0 +1,152 @@
  33 +/*
  34 + * Bluetooth PM code for the FIC Neo1973 GSM Phone
  35 + *
  36 + * (C) 2007 by OpenMoko Inc.
  37 + * Author: Harald Welte <laforge@openmoko.org>
  38 + * All rights reserved.
  39 + *
  40 + * This program is free software; you can redistribute it and/or modify
  41 + * it under the terms of the GNU General Public License version 2 as
  42 + * published by the Free Software Foundation
  43 + *
  44 + */
  45 +
  46 +#include <linux/module.h>
  47 +#include <linux/init.h>
  48 +#include <linux/kernel.h>
  49 +#include <linux/platform_device.h>
  50 +
  51 +#include <linux/pcf50606.h>
  52 +
  53 +#include <asm/hardware.h>
  54 +#include <asm/arch/gta01.h>
  55 +
  56 +#define DRVMSG "FIC Neo1973 Bluetooth Power Management"
  57 +
  58 +static ssize_t bt_read(struct device *dev, struct device_attribute *attr,
  59 +                      char *buf)
  60 +{
  61 +       if (!strcmp(attr->attr.name, "power_on")) {
  62 +               if (pcf50606_onoff_get(pcf50606_global,
  63 +                                       PCF50606_REGULATOR_D1REG) &&
  64 +                   pcf50606_voltage_get(pcf50606_global,
  65 +                                        PCF50606_REGULATOR_D1REG) == 3100)
  66 +                       goto out_1;
  67 +       } else if (!strcmp(attr->attr.name, "reset")) {
  68 +               if (s3c2410_gpio_getpin(GTA01_GPIO_BT_EN) == 0)
  69 +                       goto out_1;
  70 +       }
  71 +
  72 +       return strlcpy(buf, "0\n", 3);
  73 +out_1:
  74 +       return strlcpy(buf, "1\n", 3);
  75 +}
  76 +
  77 +static ssize_t bt_write(struct device *dev, struct device_attribute *attr,
  78 +                       const char *buf, size_t count)
  79 +{
  80 +       unsigned long on = simple_strtoul(buf, NULL, 10);
  81 +
  82 +       if (!strcmp(attr->attr.name, "power_on")) {
  83 +               /* if we are powering up, assert reset, then power, then
  84 +                * release reset */
  85 +               if (on) {
  86 +                       s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
  87 +                       pcf50606_voltage_set(pcf50606_global,
  88 +                                            PCF50606_REGULATOR_D1REG,
  89 +                                            3100);
  90 +               }
  91 +               pcf50606_onoff_set(pcf50606_global,
  92 +                                  PCF50606_REGULATOR_D1REG, on);
  93 +               s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on);
  94 +       } else if (!strcmp(attr->attr.name, "reset")) {
  95 +               /* reset is low-active, so we need to invert */
  96 +               s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1);
  97 +       }
  98 +
  99 +       return count;
 100 +}
 101 +
 102 +static DEVICE_ATTR(power_on, 0644, bt_read, bt_write);
 103 +static DEVICE_ATTR(reset, 0644, bt_read, bt_write);
 104 +
 105 +#ifdef CONFIG_PM
 106 +static int gta01_bt_suspend(struct platform_device *pdev, pm_message_t state)
 107 +{
 108 +       dev_dbg(&pdev->dev, DRVMSG ": suspending\n");
 109 +       /* FIXME: The PMU should save the PMU status, and the GPIO code should
 110 +        * preserve the GPIO level, so there shouldn't be anything left to do
 111 +        * for us, should there? */
 112 +
 113 +       return 0;
 114 +}
 115 +
 116 +static int gta01_bt_resume(struct platform_device *pdev)
 117 +{
 118 +       dev_dbg(&pdev->dev, DRVMSG ": resuming\n");
 119 +
 120 +       return 0;
 121 +}
 122 +#else
 123 +#define gta01_bt_suspend       NULL
 124 +#define gta01_bt_resume                NULL
 125 +#endif
 126 +
 127 +static struct attribute *gta01_bt_sysfs_entries[] = {
 128 +       &dev_attr_power_on.attr,
 129 +       &dev_attr_reset.attr,
 130 +       NULL
 131 +};
 132 +
 133 +static struct attribute_group gta01_bt_attr_group = {
 134 +       .name   = NULL,
 135 +       .attrs  = gta01_bt_sysfs_entries,
 136 +};
 137 +
 138 +static int __init gta01_bt_probe(struct platform_device *pdev)
 139 +{
 140 +       dev_info(&pdev->dev, DRVMSG ": starting\n");
 141 +
 142 +       /* we make sure that the voltage is off */
 143 +       pcf50606_onoff_set(pcf50606_global,
 144 +                          PCF50606_REGULATOR_D1REG, 0);
 145 +       /* we pull reset to low to make sure that the chip doesn't
 146 +        * drain power through the reset line */
 147 +       s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
 148 +
 149 +       return sysfs_create_group(&pdev->dev.kobj, &gta01_bt_attr_group);
 150 +}
 151 +
 152 +static int gta01_bt_remove(struct platform_device *pdev)
 153 +{
 154 +       sysfs_remove_group(&pdev->dev.kobj, &gta01_bt_attr_group);
 155 +
 156 +       return 0;
 157 +}
 158 +
 159 +static struct platform_driver gta01_bt_driver = {
 160 +       .probe          = gta01_bt_probe,
 161 +       .remove         = gta01_bt_remove,
 162 +       .suspend        = gta01_bt_suspend,
 163 +       .resume         = gta01_bt_resume,
 164 +       .driver         = {
 165 +               .name           = "neo1973-pm-bt",
 166 +       },
 167 +};
 168 +
 169 +static int __devinit gta01_bt_init(void)
 170 +{
 171 +       return platform_driver_register(&gta01_bt_driver);
 172 +}
 173 +
 174 +static void gta01_bt_exit(void)
 175 +{
 176 +       platform_driver_unregister(&gta01_bt_driver);
 177 +}
 178 +
 179 +module_init(gta01_bt_init);
 180 +module_exit(gta01_bt_exit);
 181 +
 182 +MODULE_LICENSE("GPL");
 183 +MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 184 +MODULE_DESCRIPTION(DRVMSG);
 185 diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
 186 new file mode 100644
 187 index 0000000..f8cf719
 188 --- /dev/null
 189 +++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
 190 @@ -0,0 +1,560 @@
 191 +/*
 192 + * GPS Power Management code for the FIC Neo1973 GSM Phone
 193 + *
 194 + * (C) 2007 by OpenMoko Inc.
 195 + * Author: Harald Welte <laforge@openmoko.org>
 196 + * All rights reserved.
 197 + *
 198 + * This program is free software; you can redistribute it and/or modify
 199 + * it under the terms of the GNU General Public License version 2 as
 200 + * published by the Free Software Foundation
 201 + *
 202 + */
 203 +
 204 +#include <linux/module.h>
 205 +#include <linux/init.h>
 206 +#include <linux/kernel.h>
 207 +#include <linux/delay.h>
 208 +#include <linux/platform_device.h>
 209 +
 210 +#include <linux/pcf50606.h>
 211 +
 212 +#include <asm/hardware.h>
 213 +#include <asm/arch/gta01.h>
 214 +
 215 +/* This is the 2.8V supply for the RTC crystal, the mail clock crystal and
 216 + * the input to VDD_RF */
 217 +static void gps_power_2v8_set(int on)
 218 +{
 219 +       switch (system_rev) {
 220 +       case GTA01v3_SYSTEM_REV:
 221 +       case GTA01v4_SYSTEM_REV:
 222 +               if (on)
 223 +                       pcf50606_voltage_set(pcf50606_global,
 224 +                                            PCF50606_REGULATOR_IOREG, 2800);
 225 +               pcf50606_onoff_set(pcf50606_global,
 226 +                                  PCF50606_REGULATOR_IOREG, on);
 227 +               break;
 228 +       case GTA01Bv2_SYSTEM_REV:
 229 +               s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_2V8, on);
 230 +                       break;
 231 +       case GTA01Bv3_SYSTEM_REV:
 232 +       case GTA01Bv4_SYSTEM_REV:
 233 +               break;
 234 +       }
 235 +}
 236 +
 237 +static int gps_power_2v8_get(void)
 238 +{
 239 +       int ret = 0;
 240 +
 241 +       switch (system_rev) {
 242 +       case GTA01v3_SYSTEM_REV:
 243 +       case GTA01v4_SYSTEM_REV:
 244 +               if (pcf50606_onoff_get(pcf50606_global,
 245 +                                       PCF50606_REGULATOR_IOREG) &&
 246 +                   pcf50606_voltage_get(pcf50606_global,
 247 +                                        PCF50606_REGULATOR_IOREG) == 2800)
 248 +                       ret = 1;
 249 +               break;
 250 +       case GTA01Bv2_SYSTEM_REV:
 251 +               if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_2V8))
 252 +                       ret = 1;
 253 +               break;
 254 +       case GTA01Bv3_SYSTEM_REV:
 255 +       case GTA01Bv4_SYSTEM_REV:
 256 +               break;
 257 +       }
 258 +
 259 +       return ret;
 260 +}
 261 +
 262 +/* This is the 3V supply (AVDD) for the external RF frontend (LNA bias) */
 263 +static void gps_power_3v_set(int on)
 264 +{
 265 +       switch (system_rev) {
 266 +       case GTA01v3_SYSTEM_REV:
 267 +       case GTA01v4_SYSTEM_REV:
 268 +               if (on)
 269 +                       pcf50606_voltage_set(pcf50606_global,
 270 +                                            PCF50606_REGULATOR_D1REG, 3000);
 271 +               pcf50606_onoff_set(pcf50606_global,
 272 +                                  PCF50606_REGULATOR_D1REG, on);
 273 +               break;
 274 +       case GTA01Bv2_SYSTEM_REV:
 275 +       case GTA01Bv3_SYSTEM_REV:
 276 +       case GTA01Bv4_SYSTEM_REV:
 277 +               s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_3V, on);
 278 +               break;
 279 +       }
 280 +}
 281 +
 282 +static int gps_power_3v_get(void)
 283 +{
 284 +       int ret = 0;
 285 +
 286 +       switch (system_rev) {
 287 +       case GTA01v3_SYSTEM_REV:
 288 +       case GTA01v4_SYSTEM_REV:
 289 +               if (pcf50606_onoff_get(pcf50606_global,
 290 +                                      PCF50606_REGULATOR_D1REG) &&
 291 +                   pcf50606_voltage_get(pcf50606_global,
 292 +                                        PCF50606_REGULATOR_D1REG) == 3000)
 293 +                       ret = 1;
 294 +               break;
 295 +       case GTA01Bv2_SYSTEM_REV:
 296 +       case GTA01Bv3_SYSTEM_REV:
 297 +       case GTA01Bv4_SYSTEM_REV:
 298 +               if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_3V))
 299 +                       ret = 1;
 300 +               break;
 301 +       }
 302 +
 303 +       return ret;
 304 +}
 305 +
 306 +/* This is the 3.3V supply for VDD_IO and VDD_LPREG input */
 307 +static void gps_power_3v3_set(int on)
 308 +{
 309 +       switch (system_rev) {
 310 +       case GTA01v3_SYSTEM_REV:
 311 +       case GTA01v4_SYSTEM_REV:
 312 +       case GTA01Bv2_SYSTEM_REV:
 313 +               if (on)
 314 +                       pcf50606_voltage_set(pcf50606_global,
 315 +                                            PCF50606_REGULATOR_DCD, 3300);
 316 +               pcf50606_onoff_set(pcf50606_global,
 317 +                                  PCF50606_REGULATOR_DCD, on);
 318 +               break;
 319 +       case GTA01Bv3_SYSTEM_REV:
 320 +       case GTA01Bv4_SYSTEM_REV:
 321 +               s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_3V3, on);
 322 +               break;
 323 +       }
 324 +}
 325 +
 326 +static int gps_power_3v3_get(void)
 327 +{
 328 +       int ret = 0;
 329 +
 330 +       switch (system_rev) {
 331 +       case GTA01v3_SYSTEM_REV:
 332 +       case GTA01v4_SYSTEM_REV:
 333 +       case GTA01Bv2_SYSTEM_REV:
 334 +               if (pcf50606_onoff_get(pcf50606_global,
 335 +                                      PCF50606_REGULATOR_DCD) &&
 336 +                   pcf50606_voltage_get(pcf50606_global,
 337 +                                        PCF50606_REGULATOR_DCD) == 3300)
 338 +                       ret = 1;
 339 +               break;
 340 +       case GTA01Bv3_SYSTEM_REV:
 341 +       case GTA01Bv4_SYSTEM_REV:
 342 +               if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_3V3))
 343 +                       ret = 1;
 344 +               break;
 345 +       }
 346 +
 347 +       return ret;
 348 +}
 349 +
 350 +/* This is the 2.5V supply for VDD_PLLREG and VDD_COREREG input */
 351 +static void gps_power_2v5_set(int on)
 352 +{
 353 +       switch (system_rev) {
 354 +       case GTA01v3_SYSTEM_REV:
 355 +               /* This is CORE_1V8 and cannot be disabled */
 356 +               break;
 357 +       case GTA01v4_SYSTEM_REV:
 358 +       case GTA01Bv2_SYSTEM_REV:
 359 +       case GTA01Bv3_SYSTEM_REV:
 360 +       case GTA01Bv4_SYSTEM_REV:
 361 +               if (on)
 362 +                       pcf50606_voltage_set(pcf50606_global,
 363 +                                            PCF50606_REGULATOR_D2REG, 2500);
 364 +               pcf50606_onoff_set(pcf50606_global,
 365 +                                  PCF50606_REGULATOR_D2REG, on);
 366 +               break;
 367 +       }
 368 +}
 369 +
 370 +static int gps_power_2v5_get(void)
 371 +{
 372 +       int ret = 0;
 373 +
 374 +       switch (system_rev) {
 375 +       case GTA01v3_SYSTEM_REV:
 376 +               /* This is CORE_1V8 and cannot be disabled */
 377 +               ret = 1;
 378 +               break;
 379 +       case GTA01v4_SYSTEM_REV:
 380 +       case GTA01Bv2_SYSTEM_REV:
 381 +       case GTA01Bv3_SYSTEM_REV:
 382 +       case GTA01Bv4_SYSTEM_REV:
 383 +               if (pcf50606_onoff_get(pcf50606_global,
 384 +                                      PCF50606_REGULATOR_D2REG) &&
 385 +                   pcf50606_voltage_get(pcf50606_global,
 386 +                                        PCF50606_REGULATOR_D2REG) == 2500)
 387 +                       ret = 1;
 388 +               break;
 389 +       }
 390 +
 391 +       return ret;
 392 +}
 393 +
 394 +/* This is the 1.5V supply for VDD_CORE */
 395 +static void gps_power_1v5_set(int on)
 396 +{
 397 +       switch (system_rev) {
 398 +       case GTA01v3_SYSTEM_REV:
 399 +       case GTA01v4_SYSTEM_REV:
 400 +       case GTA01Bv2_SYSTEM_REV:
 401 +               /* This is switched via 2v5 */
 402 +               break;
 403 +       case GTA01Bv3_SYSTEM_REV:
 404 +       case GTA01Bv4_SYSTEM_REV:
 405 +               if (on)
 406 +                       pcf50606_voltage_set(pcf50606_global,
 407 +                                            PCF50606_REGULATOR_DCD, 1500);
 408 +               pcf50606_onoff_set(pcf50606_global,
 409 +                                  PCF50606_REGULATOR_DCD, on);
 410 +               break;
 411 +       }
 412 +}
 413 +
 414 +static int gps_power_1v5_get(void)
 415 +{
 416 +       int ret = 0;
 417 +
 418 +       switch (system_rev) {
 419 +       case GTA01v3_SYSTEM_REV:
 420 +       case GTA01v4_SYSTEM_REV:
 421 +       case GTA01Bv2_SYSTEM_REV:
 422 +               /* This is switched via 2v5 */
 423 +               ret = 1;
 424 +               break;
 425 +       case GTA01Bv3_SYSTEM_REV:
 426 +       case GTA01Bv4_SYSTEM_REV:
 427 +               if (pcf50606_onoff_get(pcf50606_global,
 428 +                                      PCF50606_REGULATOR_DCD) &&
 429 +                   pcf50606_voltage_get(pcf50606_global,
 430 +                                        PCF50606_REGULATOR_DCD) == 1500)
 431 +                       ret = 1;
 432 +               break;
 433 +       }
 434 +
 435 +       return ret;
 436 +}
 437 +
 438 +/* This is the POWERON pin */
 439 +static void gps_pwron_set(int on)
 440 +{
 441 +       s3c2410_gpio_setpin(GTA01_GPIO_GPS_PWRON, on);
 442 +}
 443 +
 444 +static int gps_pwron_get(void)
 445 +{
 446 +       if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_PWRON))
 447 +               return 1;
 448 +       else
 449 +               return 0;
 450 +}
 451 +
 452 +/* This is the nRESET pin */
 453 +static void gps_rst_set(int on)
 454 +{
 455 +       switch (system_rev) {
 456 +       case GTA01v3_SYSTEM_REV:
 457 +               pcf50606_gpo0_set(pcf50606_global, on);
 458 +               break;
 459 +       case GTA01v4_SYSTEM_REV:
 460 +       case GTA01Bv2_SYSTEM_REV:
 461 +       case GTA01Bv3_SYSTEM_REV:
 462 +       case GTA01Bv4_SYSTEM_REV:
 463 +               s3c2410_gpio_setpin(GTA01_GPIO_GPS_RESET, on);
 464 +               break;
 465 +       }
 466 +}
 467 +
 468 +static int gps_rst_get(void)
 469 +{
 470 +       switch (system_rev) {
 471 +       case GTA01v3_SYSTEM_REV:
 472 +               if (pcf50606_gpo0_get(pcf50606_global))
 473 +                       return 1;
 474 +               break;
 475 +       case GTA01v4_SYSTEM_REV:
 476 +       case GTA01Bv2_SYSTEM_REV:
 477 +       case GTA01Bv3_SYSTEM_REV:
 478 +       case GTA01Bv4_SYSTEM_REV:
 479 +               if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_RESET))
 480 +                       return 1;
 481 +               break;
 482 +       }
 483 +
 484 +       return 0;
 485 +}
 486 +
 487 +static ssize_t power_gps_read(struct device *dev,
 488 +                             struct device_attribute *attr, char *buf)
 489 +{
 490 +       int ret = 0;
 491 +
 492 +       if (!strcmp(attr->attr.name, "power_tcxo_2v8")) {
 493 +               ret = gps_power_2v8_get();
 494 +       } else if (!strcmp(attr->attr.name, "power_avdd_3v")) {
 495 +               ret = gps_power_3v_get();
 496 +       } else if (!strcmp(attr->attr.name, "pwron")) {
 497 +               ret = gps_pwron_get();
 498 +       } else if (!strcmp(attr->attr.name, "reset")) {
 499 +               ret = gps_rst_get();
 500 +       } else if (!strcmp(attr->attr.name, "power_lp_io_3v3")) {
 501 +               ret = gps_power_3v3_get();
 502 +       } else if (!strcmp(attr->attr.name, "power_pll_core_2v5")) {
 503 +               ret = gps_power_2v5_get();
 504 +       } else if (!strcmp(attr->attr.name, "power_core_1v5") ||
 505 +                  !strcmp(attr->attr.name, "power_vdd_core_1v5")) {
 506 +               ret = gps_power_1v5_get();
 507 +       }
 508 +
 509 +       if (ret)
 510 +               return strlcpy(buf, "1\n", 3);
 511 +       else
 512 +               return strlcpy(buf, "0\n", 3);
 513 +}
 514 +
 515 +static ssize_t power_gps_write(struct device *dev,
 516 +                              struct device_attribute *attr, const char *buf,
 517 +                              size_t count)
 518 +{
 519 +       unsigned long on = simple_strtoul(buf, NULL, 10);
 520 +
 521 +       if (!strcmp(attr->attr.name, "power_tcxo_2v8")) {
 522 +               gps_power_2v8_set(on);
 523 +       } else if (!strcmp(attr->attr.name, "power_avdd_3v")) {
 524 +               gps_power_3v_set(on);
 525 +       } else if (!strcmp(attr->attr.name, "pwron")) {
 526 +               gps_pwron_set(on);
 527 +       } else if (!strcmp(attr->attr.name, "reset")) {
 528 +               gps_rst_set(on);
 529 +       } else if (!strcmp(attr->attr.name, "power_lp_io_3v3")) {
 530 +               gps_power_3v3_set(on);
 531 +       } else if (!strcmp(attr->attr.name, "power_pll_core_2v5")) {
 532 +               gps_power_2v5_set(on);
 533 +       } else if (!strcmp(attr->attr.name, "power_core_1v5") ||
 534 +                  !strcmp(attr->attr.name, "power_vdd_core_1v5")) {
 535 +               gps_power_1v5_set(on);
 536 +       }
 537 +
 538 +       return count;
 539 +}
 540 +
 541 +static void gps_power_sequence_up(void)
 542 +{
 543 +       /* According to PMB2520 Data Sheet, Rev. 2006-06-05,
 544 +        * Chapter 4.2.2 */
 545 +
 546 +       /* nRESET must be asserted low */
 547 +       gps_rst_set(0);
 548 +
 549 +       /* POWERON must be de-asserted (low) */
 550 +       gps_pwron_set(0);
 551 +
 552 +       /* Apply VDD_IO and VDD_LPREG_IN */
 553 +       gps_power_3v3_set(1);
 554 +
 555 +       /* VDD_COREREG_IN, VDD_PLLREG_IN */
 556 +       gps_power_1v5_set(1);
 557 +       gps_power_2v5_set(1);
 558 +
 559 +       /* and VDD_RF may be applied */
 560 +       gps_power_2v8_set(1);
 561 +
 562 +       /* We need to enable AVDD, since in GTA01Bv3 it is
 563 +        * shared with RFREG_IN */
 564 +       gps_power_3v_set(1);
 565 +
 566 +       msleep(3);      /* Is 3ms enough? */
 567 +
 568 +       /* De-asert nRESET */
 569 +       gps_rst_set(1);
 570 +
 571 +       /* Switch power on */
 572 +       gps_pwron_set(1);
 573 +
 574 +}
 575 +
 576 +static void gps_power_sequence_down(void)
 577 +{
 578 +       /* According to PMB2520 Data Sheet, Rev. 2006-06-05,
 579 +        * Chapter 4.2.3.1 */
 580 +       gps_pwron_set(0);
 581 +
 582 +       /* Don't disable AVDD before PWRON is cleared, since
 583 +        * in GTA01Bv3, AVDD and RFREG_IN are shared */
 584 +       gps_power_3v_set(0);
 585 +
 586 +       /* Remove VDD_COREREG_IN, VDD_PLLREG_IN and VDD_REFREG_IN */
 587 +       gps_power_1v5_set(0);
 588 +       gps_power_2v5_set(0);
 589 +       gps_power_2v8_set(0);
 590 +
 591 +       /* Remove VDD_LPREG_IN and VDD_IO */
 592 +       gps_power_3v3_set(0);
 593 +}
 594 +
 595 +
 596 +static ssize_t power_sequence_read(struct device *dev,
 597 +                                  struct device_attribute *attr,
 598 +                                  char *buf)
 599 +{
 600 +       return strlcpy(buf, "power_up power_down\n", PAGE_SIZE);
 601 +}
 602 +
 603 +static ssize_t power_sequence_write(struct device *dev,
 604 +                                   struct device_attribute *attr,
 605 +                                   const char *buf, size_t count)
 606 +{
 607 +       dev_dbg(dev, "wrote: '%s'\n", buf);
 608 +
 609 +       if (!strncmp(buf, "power_up", 8))
 610 +               gps_power_sequence_up();
 611 +       else if (!strncmp(buf, "power_down", 10))
 612 +               gps_power_sequence_down();
 613 +       else
 614 +               return -EINVAL;
 615 +
 616 +       return count;
 617 +}
 618 +
 619 +static DEVICE_ATTR(power_tcxo_2v8, 0644, power_gps_read, power_gps_write);
 620 +static DEVICE_ATTR(power_avdd_3v, 0644, power_gps_read, power_gps_write);
 621 +static DEVICE_ATTR(pwron, 0644, power_gps_read, power_gps_write);
 622 +static DEVICE_ATTR(reset, 0644, power_gps_read, power_gps_write);
 623 +static DEVICE_ATTR(power_lp_io_3v3, 0644, power_gps_read, power_gps_write);
 624 +static DEVICE_ATTR(power_pll_core_2v5, 0644, power_gps_read, power_gps_write);
 625 +static DEVICE_ATTR(power_core_1v5, 0644, power_gps_read, power_gps_write);
 626 +static DEVICE_ATTR(power_vdd_core_1v5, 0644, power_gps_read, power_gps_write);
 627 +static DEVICE_ATTR(power_sequence, 0644, power_sequence_read,
 628 +                  power_sequence_write);
 629 +
 630 +#ifdef CONFIG_PM
 631 +static int gta01_pm_gps_suspend(struct platform_device *pdev,
 632 +                               pm_message_t state)
 633 +{
 634 +       /* FIXME */
 635 +       gps_power_sequence_down();
 636 +
 637 +       return 0;
 638 +}
 639 +
 640 +static int gta01_pm_gps_resume(struct platform_device *pdev)
 641 +{
 642 +       /* FIXME */
 643 +       gps_power_sequence_up();
 644 +
 645 +       return 0;
 646 +}
 647 +#else
 648 +#define gta01_pm_gps_suspend   NULL
 649 +#define gta01_pm_gps_resume    NULL
 650 +#endif
 651 +
 652 +static struct attribute *gta01_gps_sysfs_entries[] = {
 653 +       &dev_attr_power_avdd_3v.attr,
 654 +       &dev_attr_pwron.attr,
 655 +       &dev_attr_reset.attr,
 656 +       &dev_attr_power_lp_io_3v3.attr,
 657 +       &dev_attr_power_pll_core_2v5.attr,
 658 +       &dev_attr_power_sequence.attr,
 659 +       NULL,   /* power_core_1v5 */
 660 +       NULL,   /* power_vdd_core_1v5 */
 661 +       NULL    /* terminating entry */
 662 +};
 663 +
 664 +static struct attribute_group gta01_gps_attr_group = {
 665 +       .name   = NULL,
 666 +       .attrs  = gta01_gps_sysfs_entries,
 667 +};
 668 +
 669 +static int __init gta01_pm_gps_probe(struct platform_device *pdev)
 670 +{
 671 +       s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_PWRON, S3C2410_GPIO_OUTPUT);
 672 +
 673 +       switch (system_rev) {
 674 +       case GTA01v3_SYSTEM_REV:
 675 +               break;
 676 +       case GTA01v4_SYSTEM_REV:
 677 +               s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_RESET, S3C2410_GPIO_OUTPUT);
 678 +               break;
 679 +       case GTA01Bv3_SYSTEM_REV:
 680 +       case GTA01Bv4_SYSTEM_REV:
 681 +               s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_3V3, S3C2410_GPIO_OUTPUT);
 682 +               /* fallthrough */
 683 +       case GTA01Bv2_SYSTEM_REV:
 684 +               s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_2V8, S3C2410_GPIO_OUTPUT);
 685 +               s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_3V, S3C2410_GPIO_OUTPUT);
 686 +               s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_RESET, S3C2410_GPIO_OUTPUT);
 687 +               break;
 688 +       default:
 689 +               dev_warn(&pdev->dev, "Unknown GTA01 Revision 0x%x, "
 690 +                        "AGPS PM features not available!!!\n",
 691 +                        system_rev);
 692 +               return -1;
 693 +               break;
 694 +       }
 695 +
 696 +       gps_power_sequence_down();
 697 +
 698 +       switch (system_rev) {
 699 +       case GTA01v3_SYSTEM_REV:
 700 +       case GTA01v4_SYSTEM_REV:
 701 +       case GTA01Bv2_SYSTEM_REV:
 702 +               gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-3] =
 703 +                                       &dev_attr_power_tcxo_2v8.attr;
 704 +               break;
 705 +       case GTA01Bv3_SYSTEM_REV:
 706 +       case GTA01Bv4_SYSTEM_REV:
 707 +               gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-3] =
 708 +                                       &dev_attr_power_core_1v5.attr;
 709 +               gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-2] =
 710 +                                       &dev_attr_power_vdd_core_1v5.attr;
 711 +               break;
 712 +       }
 713 +
 714 +       return sysfs_create_group(&pdev->dev.kobj, &gta01_gps_attr_group);
 715 +}
 716 +
 717 +static int gta01_pm_gps_remove(struct platform_device *pdev)
 718 +{
 719 +       gps_power_sequence_down();
 720 +       sysfs_remove_group(&pdev->dev.kobj, &gta01_gps_attr_group);
 721 +
 722 +       return 0;
 723 +}
 724 +
 725 +static struct platform_driver gta01_pm_gps_driver = {
 726 +       .probe          = gta01_pm_gps_probe,
 727 +       .remove         = gta01_pm_gps_remove,
 728 +       .suspend        = gta01_pm_gps_suspend,
 729 +       .resume         = gta01_pm_gps_resume,
 730 +       .driver         = {
 731 +               .name           = "neo1973-pm-gps",
 732 +       },
 733 +};
 734 +
 735 +static int __devinit gta01_pm_gps_init(void)
 736 +{
 737 +       return platform_driver_register(&gta01_pm_gps_driver);
 738 +}
 739 +
 740 +static void gta01_pm_gps_exit(void)
 741 +{
 742 +       platform_driver_unregister(&gta01_pm_gps_driver);
 743 +}
 744 +
 745 +module_init(gta01_pm_gps_init);
 746 +module_exit(gta01_pm_gps_exit);
 747 +
 748 +MODULE_LICENSE("GPL");
 749 +MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 750 +MODULE_DESCRIPTION("FIC Neo1973 GPS Power Management");
 751 diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
 752 new file mode 100644
 753 index 0000000..a1615f8
 754 --- /dev/null
 755 +++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
 756 @@ -0,0 +1,217 @@
 757 +/*
 758 + * GSM Management code for the FIC Neo1973 GSM Phone
 759 + *
 760 + * (C) 2007 by OpenMoko Inc.
 761 + * Author: Harald Welte <laforge@openmoko.org>
 762 + * All rights reserved.
 763 + *
 764 + * This program is free software; you can redistribute it and/or modify
 765 + * it under the terms of the GNU General Public License version 2 as
 766 + * published by the Free Software Foundation
 767 + *
 768 + */
 769 +
 770 +#include <linux/module.h>
 771 +#include <linux/init.h>
 772 +#include <linux/kernel.h>
 773 +#include <linux/platform_device.h>
 774 +#include <linux/console.h>
 775 +#include <linux/errno.h>
 776 +
 777 +#include <asm/hardware.h>
 778 +#include <asm/arch/gta01.h>
 779 +
 780 +struct gta01pm_priv {
 781 +       int gpio_ngsm_en;
 782 +       struct console *con;
 783 +};
 784 +
 785 +static struct gta01pm_priv gta01_gsm;
 786 +
 787 +static struct console *find_s3c24xx_console(void)
 788 +{
 789 +       struct console *con;
 790 +
 791 +       acquire_console_sem();
 792 +
 793 +       for (con = console_drivers; con; con = con->next) {
 794 +               if (!strcmp(con->name, "ttySAC"))
 795 +                       break;
 796 +       }
 797 +
 798 +       release_console_sem();
 799 +
 800 +       return con;
 801 +}
 802 +
 803 +static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
 804 +                       char *buf)
 805 +{
 806 +       if (!strcmp(attr->attr.name, "power_on")) {
 807 +               if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON))
 808 +                       goto out_1;
 809 +       } else if (!strcmp(attr->attr.name, "reset")) {
 810 +               if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_RST))
 811 +                       goto out_1;
 812 +       } else if (!strcmp(attr->attr.name, "download")) {
 813 +               if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_DNLOAD))
 814 +                       goto out_1;
 815 +       }
 816 +
 817 +       return strlcpy(buf, "0\n", 3);
 818 +out_1:
 819 +       return strlcpy(buf, "1\n", 3);
 820 +}
 821 +
 822 +static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
 823 +                        const char *buf, size_t count)
 824 +{
 825 +       unsigned long on = simple_strtoul(buf, NULL, 10);
 826 +
 827 +       if (!strcmp(attr->attr.name, "power_on")) {
 828 +               if (on) {
 829 +                       dev_info(dev, "powering up GSM, thus disconnecting "
 830 +                                "serial console\n");
 831 +
 832 +                       if (gta01_gsm.con)
 833 +                               console_stop(gta01_gsm.con);
 834 +
 835 +                       if (gta01_gsm.gpio_ngsm_en)
 836 +                               s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 0);
 837 +
 838 +                       s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 1);
 839 +               } else {
 840 +                       s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 0);
 841 +
 842 +                       if (gta01_gsm.gpio_ngsm_en)
 843 +                               s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 1);
 844 +
 845 +                       if (gta01_gsm.con)
 846 +                               console_start(gta01_gsm.con);
 847 +
 848 +                       dev_info(dev, "powered down GSM, thus enabling "
 849 +                                "serial console\n");
 850 +               }
 851 +       } else if (!strcmp(attr->attr.name, "reset")) {
 852 +               s3c2410_gpio_setpin(GTA01_GPIO_MODEM_RST, on);
 853 +       } else if (!strcmp(attr->attr.name, "download")) {
 854 +               s3c2410_gpio_setpin(GTA01_GPIO_MODEM_DNLOAD, on);
 855 +       }
 856 +
 857 +       return count;
 858 +}
 859 +
 860 +static DEVICE_ATTR(power_on, 0644, gsm_read, gsm_write);
 861 +static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
 862 +static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
 863 +
 864 +#ifdef CONFIG_PM
 865 +static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
 866 +{
 867 +       /* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
 868 +        * don't need to do anything here */
 869 +
 870 +       return 0;
 871 +}
 872 +
 873 +static int gta01_gsm_resume(struct platform_device *pdev)
 874 +{
 875 +       /* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
 876 +        * don't need to do anything here */
 877 +
 878 +       /* Make sure that the kernel console on the serial port is still
 879 +        * disabled. FIXME: resume ordering race with serial driver! */
 880 +       if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON) && gta01_gsm.con)
 881 +               console_stop(gta01_gsm.con);
 882 +
 883 +       return 0;
 884 +}
 885 +#else
 886 +#define gta01_gsm_suspend      NULL
 887 +#define gta01_gsm_resume       NULL
 888 +#endif
 889 +
 890 +static struct attribute *gta01_gsm_sysfs_entries[] = {
 891 +       &dev_attr_power_on.attr,
 892 +       &dev_attr_reset.attr,
 893 +       NULL,
 894 +       NULL
 895 +};
 896 +
 897 +static struct attribute_group gta01_gsm_attr_group = {
 898 +       .name   = NULL,
 899 +       .attrs  = gta01_gsm_sysfs_entries,
 900 +};
 901 +
 902 +static int __init gta01_gsm_probe(struct platform_device *pdev)
 903 +{
 904 +       switch (system_rev) {
 905 +       case GTA01v3_SYSTEM_REV:
 906 +               gta01_gsm.gpio_ngsm_en = GTA01v3_GPIO_nGSM_EN;
 907 +               break;
 908 +       case GTA01v4_SYSTEM_REV:
 909 +               gta01_gsm.gpio_ngsm_en = 0;
 910 +               break;
 911 +       case GTA01Bv2_SYSTEM_REV:
 912 +       case GTA01Bv3_SYSTEM_REV:
 913 +       case GTA01Bv4_SYSTEM_REV:
 914 +               gta01_gsm.gpio_ngsm_en = GTA01Bv2_GPIO_nGSM_EN;
 915 +               s3c2410_gpio_setpin(GTA01v3_GPIO_nGSM_EN, 0);
 916 +               break;
 917 +       default:
 918 +               dev_warn(&pdev->dev, "Unknown GTA01 Revision 0x%x, "
 919 +                        "some PM features not available!!!\n",
 920 +                        system_rev);
 921 +               break;
 922 +       }
 923 +
 924 +       switch (system_rev) {
 925 +       case GTA01v4_SYSTEM_REV:
 926 +       case GTA01Bv2_SYSTEM_REV:
 927 +               gta01_gsm_sysfs_entries[ARRAY_SIZE(gta01_gsm_sysfs_entries)-2] =
 928 +                                                       &dev_attr_download.attr;
 929 +               break;
 930 +       default:
 931 +               break;
 932 +       }
 933 +
 934 +       gta01_gsm.con = find_s3c24xx_console();
 935 +       if (!gta01_gsm.con)
 936 +               dev_warn(&pdev->dev, "cannot find S3C24xx console driver\n");
 937 +
 938 +       return sysfs_create_group(&pdev->dev.kobj, &gta01_gsm_attr_group);
 939 +}
 940 +
 941 +static int gta01_gsm_remove(struct platform_device *pdev)
 942 +{
 943 +       sysfs_remove_group(&pdev->dev.kobj, &gta01_gsm_attr_group);
 944 +
 945 +       return 0;
 946 +}
 947 +
 948 +static struct platform_driver gta01_gsm_driver = {
 949 +       .probe          = gta01_gsm_probe,
 950 +       .remove         = gta01_gsm_remove,
 951 +       .suspend        = gta01_gsm_suspend,
 952 +       .resume         = gta01_gsm_resume,
 953 +       .driver         = {
 954 +               .name           = "neo1973-pm-gsm",
 955 +       },
 956 +};
 957 +
 958 +static int __devinit gta01_gsm_init(void)
 959 +{
 960 +       return platform_driver_register(&gta01_gsm_driver);
 961 +}
 962 +
 963 +static void gta01_gsm_exit(void)
 964 +{
 965 +       platform_driver_unregister(&gta01_gsm_driver);
 966 +}
 967 +
 968 +module_init(gta01_gsm_init);
 969 +module_exit(gta01_gsm_exit);
 970 +
 971 +MODULE_LICENSE("GPL");
 972 +MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 973 +MODULE_DESCRIPTION("FIC Neo1973 GSM Power Management");
 974 --
 975 1.5.6.3
 976