Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Battery and Power Management code for the Sharp SL-5x00 |
| 3 | * |
| 4 | * Copyright (C) 2009 Thomas Kunze |
| 5 | * |
| 6 | * based on tosa_battery.c |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/power_supply.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/spinlock.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/gpio.h> |
| 20 | #include <linux/mfd/ucb1x00.h> |
| 21 | |
| 22 | #include <asm/mach/sharpsl_param.h> |
| 23 | #include <asm/mach-types.h> |
| 24 | #include <mach/collie.h> |
| 25 | |
| 26 | static DEFINE_MUTEX(bat_lock); /* protects gpio pins */ |
| 27 | static struct work_struct bat_work; |
| 28 | static struct ucb1x00 *ucb; |
| 29 | |
| 30 | struct collie_bat { |
| 31 | int status; |
| 32 | struct power_supply psy; |
| 33 | int full_chrg; |
| 34 | |
| 35 | struct mutex work_lock; /* protects data */ |
| 36 | |
| 37 | bool (*is_present)(struct collie_bat *bat); |
| 38 | int gpio_full; |
| 39 | int gpio_charge_on; |
| 40 | |
| 41 | int technology; |
| 42 | |
| 43 | int gpio_bat; |
| 44 | int adc_bat; |
| 45 | int adc_bat_divider; |
| 46 | int bat_max; |
| 47 | int bat_min; |
| 48 | |
| 49 | int gpio_temp; |
| 50 | int adc_temp; |
| 51 | int adc_temp_divider; |
| 52 | }; |
| 53 | |
| 54 | static struct collie_bat collie_bat_main; |
| 55 | |
| 56 | static unsigned long collie_read_bat(struct collie_bat *bat) |
| 57 | { |
| 58 | unsigned long value = 0; |
| 59 | |
| 60 | if (bat->gpio_bat < 0 || bat->adc_bat < 0) |
| 61 | return 0; |
| 62 | mutex_lock(&bat_lock); |
| 63 | gpio_set_value(bat->gpio_bat, 1); |
| 64 | msleep(5); |
| 65 | ucb1x00_adc_enable(ucb); |
| 66 | value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC); |
| 67 | ucb1x00_adc_disable(ucb); |
| 68 | gpio_set_value(bat->gpio_bat, 0); |
| 69 | mutex_unlock(&bat_lock); |
| 70 | value = value * 1000000 / bat->adc_bat_divider; |
| 71 | |
| 72 | return value; |
| 73 | } |
| 74 | |
| 75 | static unsigned long collie_read_temp(struct collie_bat *bat) |
| 76 | { |
| 77 | unsigned long value = 0; |
| 78 | if (bat->gpio_temp < 0 || bat->adc_temp < 0) |
| 79 | return 0; |
| 80 | |
| 81 | mutex_lock(&bat_lock); |
| 82 | gpio_set_value(bat->gpio_temp, 1); |
| 83 | msleep(5); |
| 84 | ucb1x00_adc_enable(ucb); |
| 85 | value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC); |
| 86 | ucb1x00_adc_disable(ucb); |
| 87 | gpio_set_value(bat->gpio_temp, 0); |
| 88 | mutex_unlock(&bat_lock); |
| 89 | |
| 90 | value = value * 10000 / bat->adc_temp_divider; |
| 91 | |
| 92 | return value; |
| 93 | } |
| 94 | |
| 95 | static int collie_bat_get_property(struct power_supply *psy, |
| 96 | enum power_supply_property psp, |
| 97 | union power_supply_propval *val) |
| 98 | { |
| 99 | int ret = 0; |
| 100 | struct collie_bat *bat = container_of(psy, struct collie_bat, psy); |
| 101 | |
| 102 | if (bat->is_present && !bat->is_present(bat) |
| 103 | && psp != POWER_SUPPLY_PROP_PRESENT) { |
| 104 | return -ENODEV; |
| 105 | } |
| 106 | |
| 107 | switch (psp) { |
| 108 | case POWER_SUPPLY_PROP_STATUS: |
| 109 | val->intval = bat->status; |
| 110 | break; |
| 111 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
| 112 | val->intval = bat->technology; |
| 113 | break; |
| 114 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| 115 | val->intval = collie_read_bat(bat); |
| 116 | break; |
| 117 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
| 118 | if (bat->full_chrg == -1) |
| 119 | val->intval = bat->bat_max; |
| 120 | else |
| 121 | val->intval = bat->full_chrg; |
| 122 | break; |
| 123 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
| 124 | val->intval = bat->bat_max; |
| 125 | break; |
| 126 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| 127 | val->intval = bat->bat_min; |
| 128 | break; |
| 129 | case POWER_SUPPLY_PROP_TEMP: |
| 130 | val->intval = collie_read_temp(bat); |
| 131 | break; |
| 132 | case POWER_SUPPLY_PROP_PRESENT: |
| 133 | val->intval = bat->is_present ? bat->is_present(bat) : 1; |
| 134 | break; |
| 135 | default: |
| 136 | ret = -EINVAL; |
| 137 | break; |
| 138 | } |
| 139 | return ret; |
| 140 | } |
| 141 | |
| 142 | static void collie_bat_external_power_changed(struct power_supply *psy) |
| 143 | { |
| 144 | schedule_work(&bat_work); |
| 145 | } |
| 146 | |
| 147 | static irqreturn_t collie_bat_gpio_isr(int irq, void *data) |
| 148 | { |
Jochen Friedrich | 629bcb4 | 2011-11-19 19:26:37 +0100 | [diff] [blame] | 149 | pr_info("collie_bat_gpio irq\n"); |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 150 | schedule_work(&bat_work); |
| 151 | return IRQ_HANDLED; |
| 152 | } |
| 153 | |
| 154 | static void collie_bat_update(struct collie_bat *bat) |
| 155 | { |
| 156 | int old; |
| 157 | struct power_supply *psy = &bat->psy; |
| 158 | |
| 159 | mutex_lock(&bat->work_lock); |
| 160 | |
| 161 | old = bat->status; |
| 162 | |
| 163 | if (bat->is_present && !bat->is_present(bat)) { |
| 164 | printk(KERN_NOTICE "%s not present\n", psy->name); |
| 165 | bat->status = POWER_SUPPLY_STATUS_UNKNOWN; |
| 166 | bat->full_chrg = -1; |
| 167 | } else if (power_supply_am_i_supplied(psy)) { |
| 168 | if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) { |
| 169 | gpio_set_value(bat->gpio_charge_on, 1); |
| 170 | mdelay(15); |
| 171 | } |
| 172 | |
| 173 | if (gpio_get_value(bat->gpio_full)) { |
| 174 | if (old == POWER_SUPPLY_STATUS_CHARGING || |
| 175 | bat->full_chrg == -1) |
| 176 | bat->full_chrg = collie_read_bat(bat); |
| 177 | |
| 178 | gpio_set_value(bat->gpio_charge_on, 0); |
| 179 | bat->status = POWER_SUPPLY_STATUS_FULL; |
| 180 | } else { |
| 181 | gpio_set_value(bat->gpio_charge_on, 1); |
| 182 | bat->status = POWER_SUPPLY_STATUS_CHARGING; |
| 183 | } |
| 184 | } else { |
| 185 | gpio_set_value(bat->gpio_charge_on, 0); |
| 186 | bat->status = POWER_SUPPLY_STATUS_DISCHARGING; |
| 187 | } |
| 188 | |
| 189 | if (old != bat->status) |
| 190 | power_supply_changed(psy); |
| 191 | |
| 192 | mutex_unlock(&bat->work_lock); |
| 193 | } |
| 194 | |
| 195 | static void collie_bat_work(struct work_struct *work) |
| 196 | { |
| 197 | collie_bat_update(&collie_bat_main); |
| 198 | } |
| 199 | |
| 200 | |
| 201 | static enum power_supply_property collie_bat_main_props[] = { |
| 202 | POWER_SUPPLY_PROP_STATUS, |
| 203 | POWER_SUPPLY_PROP_TECHNOLOGY, |
| 204 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| 205 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 206 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
| 207 | POWER_SUPPLY_PROP_VOLTAGE_MAX, |
| 208 | POWER_SUPPLY_PROP_PRESENT, |
| 209 | POWER_SUPPLY_PROP_TEMP, |
| 210 | }; |
| 211 | |
| 212 | static enum power_supply_property collie_bat_bu_props[] = { |
| 213 | POWER_SUPPLY_PROP_STATUS, |
| 214 | POWER_SUPPLY_PROP_TECHNOLOGY, |
| 215 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| 216 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 217 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
| 218 | POWER_SUPPLY_PROP_VOLTAGE_MAX, |
| 219 | POWER_SUPPLY_PROP_PRESENT, |
| 220 | }; |
| 221 | |
| 222 | static struct collie_bat collie_bat_main = { |
| 223 | .status = POWER_SUPPLY_STATUS_DISCHARGING, |
| 224 | .full_chrg = -1, |
| 225 | .psy = { |
| 226 | .name = "main-battery", |
| 227 | .type = POWER_SUPPLY_TYPE_BATTERY, |
| 228 | .properties = collie_bat_main_props, |
| 229 | .num_properties = ARRAY_SIZE(collie_bat_main_props), |
| 230 | .get_property = collie_bat_get_property, |
| 231 | .external_power_changed = collie_bat_external_power_changed, |
| 232 | .use_for_apm = 1, |
| 233 | }, |
| 234 | |
| 235 | .gpio_full = COLLIE_GPIO_CO, |
| 236 | .gpio_charge_on = COLLIE_GPIO_CHARGE_ON, |
| 237 | |
| 238 | .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, |
| 239 | |
| 240 | .gpio_bat = COLLIE_GPIO_MBAT_ON, |
| 241 | .adc_bat = UCB_ADC_INP_AD1, |
| 242 | .adc_bat_divider = 155, |
| 243 | .bat_max = 4310000, |
| 244 | .bat_min = 1551 * 1000000 / 414, |
| 245 | |
| 246 | .gpio_temp = COLLIE_GPIO_TMP_ON, |
| 247 | .adc_temp = UCB_ADC_INP_AD0, |
| 248 | .adc_temp_divider = 10000, |
| 249 | }; |
| 250 | |
| 251 | static struct collie_bat collie_bat_bu = { |
| 252 | .status = POWER_SUPPLY_STATUS_UNKNOWN, |
| 253 | .full_chrg = -1, |
| 254 | |
| 255 | .psy = { |
| 256 | .name = "backup-battery", |
| 257 | .type = POWER_SUPPLY_TYPE_BATTERY, |
| 258 | .properties = collie_bat_bu_props, |
| 259 | .num_properties = ARRAY_SIZE(collie_bat_bu_props), |
| 260 | .get_property = collie_bat_get_property, |
| 261 | .external_power_changed = collie_bat_external_power_changed, |
| 262 | }, |
| 263 | |
| 264 | .gpio_full = -1, |
| 265 | .gpio_charge_on = -1, |
| 266 | |
| 267 | .technology = POWER_SUPPLY_TECHNOLOGY_LiMn, |
| 268 | |
| 269 | .gpio_bat = COLLIE_GPIO_BBAT_ON, |
| 270 | .adc_bat = UCB_ADC_INP_AD1, |
| 271 | .adc_bat_divider = 155, |
| 272 | .bat_max = 3000000, |
| 273 | .bat_min = 1900000, |
| 274 | |
| 275 | .gpio_temp = -1, |
| 276 | .adc_temp = -1, |
| 277 | .adc_temp_divider = -1, |
| 278 | }; |
| 279 | |
Axel Lin | 389cd20 | 2011-08-26 15:52:48 +0800 | [diff] [blame] | 280 | static struct gpio collie_batt_gpios[] = { |
| 281 | { COLLIE_GPIO_CO, GPIOF_IN, "main battery full" }, |
| 282 | { COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN, "main battery low" }, |
| 283 | { COLLIE_GPIO_CHARGE_ON, GPIOF_OUT_INIT_LOW, "main charge on" }, |
| 284 | { COLLIE_GPIO_MBAT_ON, GPIOF_OUT_INIT_LOW, "main battery" }, |
| 285 | { COLLIE_GPIO_TMP_ON, GPIOF_OUT_INIT_LOW, "main battery temp" }, |
| 286 | { COLLIE_GPIO_BBAT_ON, GPIOF_OUT_INIT_LOW, "backup battery" }, |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 287 | }; |
| 288 | |
| 289 | #ifdef CONFIG_PM |
| 290 | static int collie_bat_suspend(struct ucb1x00_dev *dev, pm_message_t state) |
| 291 | { |
| 292 | /* flush all pending status updates */ |
Tejun Heo | 4382973 | 2012-08-20 14:51:24 -0700 | [diff] [blame] | 293 | flush_work(&bat_work); |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static int collie_bat_resume(struct ucb1x00_dev *dev) |
| 298 | { |
| 299 | /* things may have changed while we were away */ |
| 300 | schedule_work(&bat_work); |
| 301 | return 0; |
| 302 | } |
| 303 | #else |
| 304 | #define collie_bat_suspend NULL |
| 305 | #define collie_bat_resume NULL |
| 306 | #endif |
| 307 | |
Bill Pemberton | c8afa64 | 2012-11-19 13:22:23 -0500 | [diff] [blame^] | 308 | static int collie_bat_probe(struct ucb1x00_dev *dev) |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 309 | { |
| 310 | int ret; |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 311 | |
| 312 | if (!machine_is_collie()) |
| 313 | return -ENODEV; |
| 314 | |
| 315 | ucb = dev->ucb; |
| 316 | |
Axel Lin | 389cd20 | 2011-08-26 15:52:48 +0800 | [diff] [blame] | 317 | ret = gpio_request_array(collie_batt_gpios, |
| 318 | ARRAY_SIZE(collie_batt_gpios)); |
| 319 | if (ret) |
| 320 | return ret; |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 321 | |
| 322 | mutex_init(&collie_bat_main.work_lock); |
| 323 | |
| 324 | INIT_WORK(&bat_work, collie_bat_work); |
| 325 | |
| 326 | ret = power_supply_register(&dev->ucb->dev, &collie_bat_main.psy); |
| 327 | if (ret) |
| 328 | goto err_psy_reg_main; |
| 329 | ret = power_supply_register(&dev->ucb->dev, &collie_bat_bu.psy); |
| 330 | if (ret) |
| 331 | goto err_psy_reg_bu; |
| 332 | |
| 333 | ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO), |
| 334 | collie_bat_gpio_isr, |
| 335 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
| 336 | "main full", &collie_bat_main); |
| 337 | if (!ret) { |
| 338 | schedule_work(&bat_work); |
| 339 | return 0; |
| 340 | } |
| 341 | power_supply_unregister(&collie_bat_bu.psy); |
| 342 | err_psy_reg_bu: |
| 343 | power_supply_unregister(&collie_bat_main.psy); |
| 344 | err_psy_reg_main: |
| 345 | |
| 346 | /* see comment in collie_bat_remove */ |
Tejun Heo | bc51e7f | 2010-12-11 17:51:45 +0100 | [diff] [blame] | 347 | cancel_work_sync(&bat_work); |
Axel Lin | 389cd20 | 2011-08-26 15:52:48 +0800 | [diff] [blame] | 348 | gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios)); |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 349 | return ret; |
| 350 | } |
| 351 | |
| 352 | static void __devexit collie_bat_remove(struct ucb1x00_dev *dev) |
| 353 | { |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 354 | free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main); |
| 355 | |
| 356 | power_supply_unregister(&collie_bat_bu.psy); |
| 357 | power_supply_unregister(&collie_bat_main.psy); |
| 358 | |
| 359 | /* |
Tejun Heo | bc51e7f | 2010-12-11 17:51:45 +0100 | [diff] [blame] | 360 | * Now cancel the bat_work. We won't get any more schedules, |
| 361 | * since all sources (isr and external_power_changed) are |
| 362 | * unregistered now. |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 363 | */ |
Tejun Heo | bc51e7f | 2010-12-11 17:51:45 +0100 | [diff] [blame] | 364 | cancel_work_sync(&bat_work); |
Axel Lin | 389cd20 | 2011-08-26 15:52:48 +0800 | [diff] [blame] | 365 | gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios)); |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | static struct ucb1x00_driver collie_bat_driver = { |
| 369 | .add = collie_bat_probe, |
Bill Pemberton | 28ea73f | 2012-11-19 13:20:40 -0500 | [diff] [blame] | 370 | .remove = collie_bat_remove, |
Thomas Kunze | f1fce59 | 2009-02-10 14:12:29 +0100 | [diff] [blame] | 371 | .suspend = collie_bat_suspend, |
| 372 | .resume = collie_bat_resume, |
| 373 | }; |
| 374 | |
| 375 | static int __init collie_bat_init(void) |
| 376 | { |
| 377 | return ucb1x00_register_driver(&collie_bat_driver); |
| 378 | } |
| 379 | |
| 380 | static void __exit collie_bat_exit(void) |
| 381 | { |
| 382 | ucb1x00_unregister_driver(&collie_bat_driver); |
| 383 | } |
| 384 | |
| 385 | module_init(collie_bat_init); |
| 386 | module_exit(collie_bat_exit); |
| 387 | |
| 388 | MODULE_LICENSE("GPL"); |
| 389 | MODULE_AUTHOR("Thomas Kunze"); |
| 390 | MODULE_DESCRIPTION("Collie battery driver"); |