code.vuplus.com Git - vuplus_openembedded/blob - packages/linux/linux-2.6.28/collie/0018-collie-add-battery-driver.patch

   1 From a2cf77eaf64b201a00b9682c25596ef0bcda8dc4 Mon Sep 17 00:00:00 2001
   2 From: Thomas Kunze <thommycheck@gmx.de>
   3 Date: Tue, 10 Feb 2009 18:16:03 +0100
   4 Subject: [PATCH 18/23] collie: add battery driver
   5
   6 This driver is based on tosa_battery.c.
   7
   8 Conflicts:
   9
  10         drivers/power/Makefile
  11 ---
  12  drivers/power/Kconfig          |    7 +
  13  drivers/power/Makefile         |    1 +
  14  drivers/power/collie_battery.c |  418 ++++++++++++++++++++++++++++++++++++++++
  15  3 files changed, 426 insertions(+), 0 deletions(-)
  16  create mode 100644 drivers/power/collie_battery.c
  17
  18 diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
  19 index 8e0c2b4..a945046 100644
  20 --- a/drivers/power/Kconfig
  21 +++ b/drivers/power/Kconfig
  22 @@ -56,6 +56,13 @@ config BATTERY_TOSA
  23           Say Y to enable support for the battery on the Sharp Zaurus
  24           SL-6000 (tosa) models.
  25
  26 +config BATTERY_COLLIE
  27 +       tristate "Sharp SL-5500 (collie) battery"
  28 +       depends on SA1100_COLLIE && MCP_UCB1200
  29 +       help
  30 +         Say Y to enable support for the battery on the Sharp Zaurus
  31 +         SL-5500 (collie) models.
  32 +
  33  config BATTERY_WM97XX
  34         bool "WM97xx generic battery driver"
  35         depends on TOUCHSCREEN_WM97XX=y
  36 diff --git a/drivers/power/Makefile b/drivers/power/Makefile
  37 index e8f1ece..51a7263 100644
  38 --- a/drivers/power/Makefile
  39 +++ b/drivers/power/Makefile
  40 @@ -21,5 +21,6 @@ obj-$(CONFIG_BATTERY_DS2760)  += ds2760_battery.o
  41  obj-$(CONFIG_BATTERY_PMU)      += pmu_battery.o
  42  obj-$(CONFIG_BATTERY_OLPC)     += olpc_battery.o
  43  obj-$(CONFIG_BATTERY_TOSA)     += tosa_battery.o
  44 +obj-$(CONFIG_BATTERY_COLLIE)   += collie_battery.o
  45  obj-$(CONFIG_BATTERY_WM97XX)   += wm97xx_battery.o
  46  obj-$(CONFIG_BATTERY_BQ27x00)  += bq27x00_battery.o
  47 diff --git a/drivers/power/collie_battery.c b/drivers/power/collie_battery.c
  48 new file mode 100644
  49 index 0000000..039f41a
  50 --- /dev/null
  51 +++ b/drivers/power/collie_battery.c
  52 @@ -0,0 +1,418 @@
  53 +/*
  54 + * Battery and Power Management code for the Sharp SL-5x00
  55 + *
  56 + * Copyright (C) 2009 Thomas Kunze
  57 + *
  58 + * based on tosa_battery.c
  59 + *
  60 + * This program is free software; you can redistribute it and/or modify
  61 + * it under the terms of the GNU General Public License version 2 as
  62 + * published by the Free Software Foundation.
  63 + *
  64 + */
  65 +#include <linux/kernel.h>
  66 +#include <linux/module.h>
  67 +#include <linux/power_supply.h>
  68 +#include <linux/delay.h>
  69 +#include <linux/spinlock.h>
  70 +#include <linux/interrupt.h>
  71 +#include <linux/gpio.h>
  72 +#include <linux/mfd/ucb1x00.h>
  73 +
  74 +#include <asm/mach/sharpsl_param.h>
  75 +#include <asm/mach-types.h>
  76 +#include <mach/collie.h>
  77 +
  78 +static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
  79 +static struct work_struct bat_work;
  80 +static struct ucb1x00 *ucb;
  81 +
  82 +struct collie_bat {
  83 +       int status;
  84 +       struct power_supply psy;
  85 +       int full_chrg;
  86 +
  87 +       struct mutex work_lock; /* protects data */
  88 +
  89 +       bool (*is_present)(struct collie_bat *bat);
  90 +       int gpio_full;
  91 +       int gpio_charge_on;
  92 +
  93 +       int technology;
  94 +
  95 +       int gpio_bat;
  96 +       int adc_bat;
  97 +       int adc_bat_divider;
  98 +       int bat_max;
  99 +       int bat_min;
 100 +
 101 +       int gpio_temp;
 102 +       int adc_temp;
 103 +       int adc_temp_divider;
 104 +};
 105 +
 106 +static struct collie_bat collie_bat_main;
 107 +
 108 +static unsigned long collie_read_bat(struct collie_bat *bat)
 109 +{
 110 +       unsigned long value = 0;
 111 +
 112 +       if (bat->gpio_bat < 0 || bat->adc_bat < 0)
 113 +               return 0;
 114 +       mutex_lock(&bat_lock);
 115 +       gpio_set_value(bat->gpio_bat, 1);
 116 +       msleep(5);
 117 +       ucb1x00_adc_enable(ucb);
 118 +       value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);
 119 +       ucb1x00_adc_disable(ucb);
 120 +       gpio_set_value(bat->gpio_bat, 0);
 121 +       mutex_unlock(&bat_lock);
 122 +       value = value * 1000000 / bat->adc_bat_divider;
 123 +
 124 +       return value;
 125 +}
 126 +
 127 +static unsigned long collie_read_temp(struct collie_bat *bat)
 128 +{
 129 +       unsigned long value = 0;
 130 +       if (bat->gpio_temp < 0 || bat->adc_temp < 0)
 131 +               return 0;
 132 +
 133 +       mutex_lock(&bat_lock);
 134 +       gpio_set_value(bat->gpio_temp, 1);
 135 +       msleep(5);
 136 +       ucb1x00_adc_enable(ucb);
 137 +       value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC);
 138 +       ucb1x00_adc_disable(ucb);
 139 +       gpio_set_value(bat->gpio_temp, 0);
 140 +       mutex_unlock(&bat_lock);
 141 +
 142 +       value = value * 10000 / bat->adc_temp_divider;
 143 +
 144 +       return value;
 145 +}
 146 +
 147 +static int collie_bat_get_property(struct power_supply *psy,
 148 +                           enum power_supply_property psp,
 149 +                           union power_supply_propval *val)
 150 +{
 151 +       int ret = 0;
 152 +       struct collie_bat *bat = container_of(psy, struct collie_bat, psy);
 153 +
 154 +       if (bat->is_present && !bat->is_present(bat)
 155 +                       && psp != POWER_SUPPLY_PROP_PRESENT) {
 156 +               return -ENODEV;
 157 +       }
 158 +
 159 +       switch (psp) {
 160 +       case POWER_SUPPLY_PROP_STATUS:
 161 +               val->intval = bat->status;
 162 +               break;
 163 +       case POWER_SUPPLY_PROP_TECHNOLOGY:
 164 +               val->intval = bat->technology;
 165 +               break;
 166 +       case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 167 +               val->intval = collie_read_bat(bat);
 168 +               break;
 169 +       case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 170 +               if (bat->full_chrg == -1)
 171 +                       val->intval = bat->bat_max;
 172 +               else
 173 +                       val->intval = bat->full_chrg;
 174 +               break;
 175 +       case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 176 +               val->intval = bat->bat_max;
 177 +               break;
 178 +       case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 179 +               val->intval = bat->bat_min;
 180 +               break;
 181 +       case POWER_SUPPLY_PROP_TEMP:
 182 +               val->intval = collie_read_temp(bat);
 183 +               break;
 184 +       case POWER_SUPPLY_PROP_PRESENT:
 185 +               val->intval = bat->is_present ? bat->is_present(bat) : 1;
 186 +               break;
 187 +       default:
 188 +               ret = -EINVAL;
 189 +               break;
 190 +       }
 191 +       return ret;
 192 +}
 193 +
 194 +static void collie_bat_external_power_changed(struct power_supply *psy)
 195 +{
 196 +       schedule_work(&bat_work);
 197 +}
 198 +
 199 +static irqreturn_t collie_bat_gpio_isr(int irq, void *data)
 200 +{
 201 +       pr_info("collie_bat_gpio irq: %d\n", gpio_get_value(irq_to_gpio(irq)));
 202 +       schedule_work(&bat_work);
 203 +       return IRQ_HANDLED;
 204 +}
 205 +
 206 +static void collie_bat_update(struct collie_bat *bat)
 207 +{
 208 +       int old;
 209 +       struct power_supply *psy = &bat->psy;
 210 +
 211 +       mutex_lock(&bat->work_lock);
 212 +
 213 +       old = bat->status;
 214 +
 215 +       if (bat->is_present && !bat->is_present(bat)) {
 216 +               printk(KERN_NOTICE "%s not present\n", psy->name);
 217 +               bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
 218 +               bat->full_chrg = -1;
 219 +       } else if (power_supply_am_i_supplied(psy)) {
 220 +               if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
 221 +                       gpio_set_value(bat->gpio_charge_on, 1);
 222 +                       mdelay(15);
 223 +               }
 224 +
 225 +               if (gpio_get_value(bat->gpio_full)) {
 226 +                       if (old == POWER_SUPPLY_STATUS_CHARGING ||
 227 +                                       bat->full_chrg == -1)
 228 +                               bat->full_chrg = collie_read_bat(bat);
 229 +
 230 +                       gpio_set_value(bat->gpio_charge_on, 0);
 231 +                       bat->status = POWER_SUPPLY_STATUS_FULL;
 232 +               } else {
 233 +                       gpio_set_value(bat->gpio_charge_on, 1);
 234 +                       bat->status = POWER_SUPPLY_STATUS_CHARGING;
 235 +               }
 236 +       } else {
 237 +               gpio_set_value(bat->gpio_charge_on, 0);
 238 +               bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
 239 +       }
 240 +
 241 +       if (old != bat->status)
 242 +               power_supply_changed(psy);
 243 +
 244 +       mutex_unlock(&bat->work_lock);
 245 +}
 246 +
 247 +static void collie_bat_work(struct work_struct *work)
 248 +{
 249 +       collie_bat_update(&collie_bat_main);
 250 +}
 251 +
 252 +
 253 +static enum power_supply_property collie_bat_main_props[] = {
 254 +       POWER_SUPPLY_PROP_STATUS,
 255 +       POWER_SUPPLY_PROP_TECHNOLOGY,
 256 +       POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 257 +       POWER_SUPPLY_PROP_VOLTAGE_NOW,
 258 +       POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 259 +       POWER_SUPPLY_PROP_VOLTAGE_MAX,
 260 +       POWER_SUPPLY_PROP_PRESENT,
 261 +       POWER_SUPPLY_PROP_TEMP,
 262 +};
 263 +
 264 +static enum power_supply_property collie_bat_bu_props[] = {
 265 +       POWER_SUPPLY_PROP_STATUS,
 266 +       POWER_SUPPLY_PROP_TECHNOLOGY,
 267 +       POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 268 +       POWER_SUPPLY_PROP_VOLTAGE_NOW,
 269 +       POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 270 +       POWER_SUPPLY_PROP_VOLTAGE_MAX,
 271 +       POWER_SUPPLY_PROP_PRESENT,
 272 +};
 273 +
 274 +static struct collie_bat collie_bat_main = {
 275 +       .status = POWER_SUPPLY_STATUS_DISCHARGING,
 276 +       .full_chrg = -1,
 277 +       .psy = {
 278 +               .name           = "main-battery",
 279 +               .type           = POWER_SUPPLY_TYPE_BATTERY,
 280 +               .properties     = collie_bat_main_props,
 281 +               .num_properties = ARRAY_SIZE(collie_bat_main_props),
 282 +               .get_property   = collie_bat_get_property,
 283 +               .external_power_changed = collie_bat_external_power_changed,
 284 +               .use_for_apm    = 1,
 285 +       },
 286 +
 287 +       .gpio_full = COLLIE_GPIO_CO,
 288 +       .gpio_charge_on = COLLIE_GPIO_CHARGE_ON,
 289 +
 290 +       .technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
 291 +
 292 +       .gpio_bat = COLLIE_GPIO_MBAT_ON,
 293 +       .adc_bat = UCB_ADC_INP_AD1,
 294 +       .adc_bat_divider = 155,
 295 +       .bat_max = 4310000,
 296 +       .bat_min = 1551 * 1000000 / 414,
 297 +
 298 +       .gpio_temp = COLLIE_GPIO_TMP_ON,
 299 +       .adc_temp = UCB_ADC_INP_AD0,
 300 +       .adc_temp_divider = 10000,
 301 +};
 302 +
 303 +static struct collie_bat collie_bat_bu = {
 304 +       .status = POWER_SUPPLY_STATUS_UNKNOWN,
 305 +       .full_chrg = -1,
 306 +
 307 +       .psy = {
 308 +               .name           = "backup-battery",
 309 +               .type           = POWER_SUPPLY_TYPE_BATTERY,
 310 +               .properties     = collie_bat_bu_props,
 311 +               .num_properties = ARRAY_SIZE(collie_bat_bu_props),
 312 +               .get_property   = collie_bat_get_property,
 313 +               .external_power_changed = collie_bat_external_power_changed,
 314 +       },
 315 +
 316 +       .gpio_full = -1,
 317 +       .gpio_charge_on = -1,
 318 +
 319 +       .technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
 320 +
 321 +       .gpio_bat = COLLIE_GPIO_BBAT_ON,
 322 +       .adc_bat = UCB_ADC_INP_AD1,
 323 +       .adc_bat_divider = 155,
 324 +       .bat_max = 3000000,
 325 +       .bat_min = 1900000,
 326 +
 327 +       .gpio_temp = -1,
 328 +       .adc_temp = -1,
 329 +       .adc_temp_divider = -1,
 330 +};
 331 +
 332 +static struct {
 333 +       int gpio;
 334 +       char *name;
 335 +       bool output;
 336 +       int value;
 337 +} gpios[] = {
 338 +       { COLLIE_GPIO_CO,               "main battery full",    0, 0 },
 339 +       { COLLIE_GPIO_MAIN_BAT_LOW,     "main battery low",     0, 0 },
 340 +       { COLLIE_GPIO_CHARGE_ON,        "main charge on",       1, 0 },
 341 +       { COLLIE_GPIO_MBAT_ON,          "main battery",         1, 0 },
 342 +       { COLLIE_GPIO_TMP_ON,           "main battery temp",    1, 0 },
 343 +       { COLLIE_GPIO_BBAT_ON,          "backup battery",       1, 0 },
 344 +};
 345 +
 346 +#ifdef CONFIG_PM
 347 +static int collie_bat_suspend(struct ucb1x00_dev *dev, pm_message_t state)
 348 +{
 349 +       /* flush all pending status updates */
 350 +       flush_scheduled_work();
 351 +       return 0;
 352 +}
 353 +
 354 +static int collie_bat_resume(struct ucb1x00_dev *dev)
 355 +{
 356 +       /* things may have changed while we were away */
 357 +       schedule_work(&bat_work);
 358 +       return 0;
 359 +}
 360 +#else
 361 +#define collie_bat_suspend NULL
 362 +#define collie_bat_resume NULL
 363 +#endif
 364 +
 365 +static int __devinit collie_bat_probe(struct ucb1x00_dev *dev)
 366 +{
 367 +       int ret;
 368 +       int i;
 369 +
 370 +       if (!machine_is_collie())
 371 +               return -ENODEV;
 372 +
 373 +       ucb = dev->ucb;
 374 +
 375 +       for (i = 0; i < ARRAY_SIZE(gpios); i++) {
 376 +               ret = gpio_request(gpios[i].gpio, gpios[i].name);
 377 +               if (ret) {
 378 +                       i--;
 379 +                       goto err_gpio;
 380 +               }
 381 +
 382 +               if (gpios[i].output)
 383 +                       ret = gpio_direction_output(gpios[i].gpio,
 384 +                                       gpios[i].value);
 385 +               else
 386 +                       ret = gpio_direction_input(gpios[i].gpio);
 387 +
 388 +               if (ret)
 389 +                       goto err_gpio;
 390 +       }
 391 +
 392 +       mutex_init(&collie_bat_main.work_lock);
 393 +
 394 +       INIT_WORK(&bat_work, collie_bat_work);
 395 +
 396 +       ret = power_supply_register(&dev->ucb->dev, &collie_bat_main.psy);
 397 +       if (ret)
 398 +               goto err_psy_reg_main;
 399 +       ret = power_supply_register(&dev->ucb->dev, &collie_bat_bu.psy);
 400 +       if (ret)
 401 +               goto err_psy_reg_bu;
 402 +
 403 +       ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO),
 404 +                               collie_bat_gpio_isr,
 405 +                               IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 406 +                               "main full", &collie_bat_main);
 407 +       if (!ret) {
 408 +               schedule_work(&bat_work);
 409 +               return 0;
 410 +       }
 411 +       power_supply_unregister(&collie_bat_bu.psy);
 412 +err_psy_reg_bu:
 413 +       power_supply_unregister(&collie_bat_main.psy);
 414 +err_psy_reg_main:
 415 +
 416 +       /* see comment in collie_bat_remove */
 417 +       flush_scheduled_work();
 418 +
 419 +       i--;
 420 +err_gpio:
 421 +       for (; i >= 0; i--)
 422 +               gpio_free(gpios[i].gpio);
 423 +
 424 +       return ret;
 425 +}
 426 +
 427 +static void __devexit collie_bat_remove(struct ucb1x00_dev *dev)
 428 +{
 429 +       int i;
 430 +
 431 +       free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);
 432 +
 433 +       power_supply_unregister(&collie_bat_bu.psy);
 434 +       power_supply_unregister(&collie_bat_main.psy);
 435 +
 436 +       /*
 437 +        * now flush all pending work.
 438 +        * we won't get any more schedules, since all
 439 +        * sources (isr and external_power_changed)
 440 +        * are unregistered now.
 441 +        */
 442 +       flush_scheduled_work();
 443 +
 444 +       for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
 445 +               gpio_free(gpios[i].gpio);
 446 +}
 447 +
 448 +static struct ucb1x00_driver collie_bat_driver = {
 449 +       .add            = collie_bat_probe,
 450 +       .remove         = __devexit_p(collie_bat_remove),
 451 +       .suspend        = collie_bat_suspend,
 452 +       .resume         = collie_bat_resume,
 453 +};
 454 +
 455 +static int __init collie_bat_init(void)
 456 +{
 457 +       return ucb1x00_register_driver(&collie_bat_driver);
 458 +}
 459 +
 460 +static void __exit collie_bat_exit(void)
 461 +{
 462 +       ucb1x00_unregister_driver(&collie_bat_driver);
 463 +}
 464 +
 465 +module_init(collie_bat_init);
 466 +module_exit(collie_bat_exit);
 467 +
 468 +MODULE_LICENSE("GPL");
 469 +MODULE_AUTHOR("Thomas Kunze");
 470 +MODULE_DESCRIPTION("Collie battery driver");
 471 --
 472 1.5.6.5
 473