drivers/mfd/rt5025-irq.c

   1 /*
   2  *  drivers/mfd/rt5025-irq.c
   3  *  Driver foo Richtek RT5025 PMIC irq
   4  *
   5  *  Copyright (C) 2013 Richtek Electronics
   6  *  cy_huang <cy_huang@richtek.com>
   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/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/err.h>
  16 #include <linux/i2c.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/slab.h>
  19 #include <linux/wakelock.h>
  20 #include <linux/delay.h>
  21
  22 #include <linux/gpio.h>
  23 #include <linux/irq.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/workqueue.h>
  26
  27 #include <linux/mfd/rt5025.h>
  28 #include <linux/mfd/rt5025-irq.h>
  29
  30 struct rt5025_irq_info {
  31         struct i2c_client *i2c;
  32         struct device *dev;
  33         struct rt5025_chip *chip;
  34         struct workqueue_struct *wq;
  35         struct rt5025_event_callback *event_cb;
  36         struct delayed_work delayed_work;
  37         struct wake_lock irq_wake_lock;
  38         int intr_pin;
  39         int irq;
  40         int suspend;
  41         int init_once;
  42 };
  43
  44 static void rt5025_work_func(struct work_struct *work)
  45 {
  46         struct delayed_work *delayed_work = (struct delayed_work *)container_of(work, struct delayed_work, work);
  47         struct rt5025_irq_info *ii = (struct rt5025_irq_info *)container_of(delayed_work, struct rt5025_irq_info, delayed_work);
  48         unsigned char irq_stat[6] = {0};
  49         unsigned char irq_enable[6] = {0};
  50         uint32_t chg_event = 0, pwr_event = 0;
  51
  52         //Add this to prevent i2c xfer before i2c chip is in suspend mode
  53         if (ii->suspend)
  54         {
  55                 queue_delayed_work(ii->wq, &ii->delayed_work, msecs_to_jiffies(1));
  56                 return;
  57         }
  58
  59         #ifdef CONFIG_POWER_RT5025
  60         if (!ii->chip->power_info || !ii->chip->jeita_info || !ii->chip->battery_info)
  61         {
  62                 queue_delayed_work(ii->wq, &ii->delayed_work, msecs_to_jiffies(1));
  63                 return;
  64         }
  65         #endif
  66
  67         #if 0
  68         if (rt5025_reg_block_read(ii->i2c, RT5025_REG_IRQEN1, 10, irq_stat) >= 0)
  69         {
  70         #endif
  71                 /* backup the irq enable bit */
  72                 irq_enable[0] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQEN1);
  73                 irq_enable[1] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQEN2);
  74                 irq_enable[2] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQEN3);
  75                 irq_enable[3] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQEN4);
  76                 irq_enable[4] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQEN5);
  77                 irq_enable[5] = rt5025_reg_read(ii->i2c, RT5025_REG_GAUGEIRQEN);
  78                 #if 1
  79                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN2, irq_enable[1]&(~RT5025_CHTERMI_MASK));
  80                 #else
  81                 /* disable all irq enable bit first */
  82                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN1, irq_enable[0]&RT5025_ADAPIRQ_MASK);
  83                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN2, 0x00);
  84                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN3, 0x00);
  85                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN4, 0x00);
  86                 rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN5, 0x00);
  87                 rt5025_reg_write(ii->i2c, RT5025_REG_GAUGEIRQEN, 0x00);
  88                 #endif //#if 0
  89                 /* read irq status bit */
  90                 irq_stat[0] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQSTATUS1);
  91                 irq_stat[1] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQSTATUS2);
  92                 irq_stat[2] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQSTATUS3);
  93                 irq_stat[3] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQSTATUS4);
  94                 irq_stat[4] = rt5025_reg_read(ii->i2c, RT5025_REG_IRQSTATUS5);
  95                 irq_stat[5] = rt5025_reg_read(ii->i2c, RT5025_REG_GAUGEIRQFLG);
  96                 RTINFO("irq1->0x%02x, irq2->0x%02x, irq3->0x%02x\n", irq_stat[0], irq_stat[1], irq_stat[2]);
  97                 RTINFO("irq4->0x%02x, irq5->0x%02x, irq6->0x%02x\n", irq_stat[3], irq_stat[4], irq_stat[5]);
  98                 RTINFO("stat value = %02x\n", rt5025_reg_read(ii->i2c, RT5025_REG_CHGSTAT));
  99
 100                 chg_event = irq_stat[0]<<16 | irq_stat[1]<<8 | irq_stat[2];
 101                 pwr_event = irq_stat[3]<<8 | irq_stat[4];
 102                 #ifdef CONFIG_POWER_RT5025
 103                 if ((chg_event & CHARGER_DETECT_MASK))
 104                 {
 105                         if (chg_event & CHG_EVENT_CHTERMI)
 106                         {
 107                                 ii->chip->power_info->chg_term++;
 108                                 if (ii->chip->power_info->chg_term > 3)
 109                                         ii->chip->power_info->chg_term = 4;
 110                         }
 111
 112                         if (chg_event & CHG_EVENT_CHRCHGI)
 113                                 ii->chip->power_info->chg_term = 0;
 114
 115                         if (chg_event & (CHG_EVENT_CHSLPI_INAC | CHG_EVENT_CHSLPI_INUSB))
 116                         {
 117                                 ii->chip->power_info->chg_term = 0;
 118                         }
 119
 120                         if (chg_event & (CHG_EVENT_INAC_PLUGIN | CHG_EVENT_INUSB_PLUGIN))
 121                         {
 122                                 if (!ii->init_once)
 123                                 {
 124                                         rt5025_set_charging_buck(ii->i2c, 0);
 125                                         mdelay(50);
 126                                         rt5025_set_charging_buck(ii->i2c, 1);
 127                                         mdelay(100);
 128                                         rt5025_set_charging_buck(ii->i2c, 0);
 129                                         mdelay(50);
 130                                         rt5025_set_charging_buck(ii->i2c, 1);
 131                                         mdelay(400);
 132                                 }
 133                         }
 134
 135                         if (ii->chip->power_info->chg_term <= 3)
 136                                 rt5025_power_charge_detect(ii->chip->power_info);
 137
 138                 }
 139                 #endif /* CONFIG_POWER_RT5025 */
 140                 if (ii->event_cb)
 141                 {
 142                         if (chg_event)
 143                                 ii->event_cb->charger_event_callback(chg_event);
 144                         if (pwr_event)
 145                                 ii->event_cb->power_event_callkback(pwr_event);
 146                 }
 147         #if 0
 148         }
 149         else
 150                 dev_err(ii->dev, "read irq stat io fail\n");
 151         #endif
 152
 153
 154         #ifdef CONFIG_POWER_RT5025
 155         if (irq_stat[5] & RT5025_FLG_TEMP)
 156                 rt5025_swjeita_irq_handler(ii->chip->jeita_info, irq_stat[5] & RT5025_FLG_TEMP);
 157         if (irq_stat[5] & RT5025_FLG_VOLT)
 158                 rt5025_gauge_irq_handler(ii->chip->battery_info, irq_stat[5] & RT5025_FLG_VOLT);
 159         #endif /* CONFIG_POWER_RT5025 */
 160
 161         if (ii->init_once)
 162                 ii->init_once = 0;
 163
 164         #if 1
 165         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN2, irq_enable[1]);
 166         #else
 167         /* restore all irq enable bit */
 168         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN1, irq_enable[0]);
 169         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN2, irq_enable[1]);
 170         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN3, irq_enable[2]);
 171         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN4, irq_enable[3]);
 172         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN5, irq_enable[4]);
 173         if (rt5025_reg_read(ii->i2c, RT5025_REG_GAUGEIRQEN) == 0)
 174                 rt5025_reg_write(ii->i2c, RT5025_REG_GAUGEIRQEN, irq_enable[5]);
 175         #endif //#if 0
 176
 177         //enable_irq(ii->irq);
 178 }
 179
 180 static irqreturn_t rt5025_interrupt(int irqno, void *param)
 181 {
 182         struct rt5025_irq_info *ii = (struct rt5025_irq_info *)param;
 183
 184         //disable_irq_nosync(ii->irq);
 185         wake_lock_timeout(&ii->irq_wake_lock, 1*HZ);
 186         queue_delayed_work(ii->wq, &ii->delayed_work, 0);
 187         return IRQ_HANDLED;
 188 }
 189
 190 static int __devinit rt5025_interrupt_init(struct rt5025_irq_info* ii)
 191 {
 192         int ret = 0;
 193
 194         RTINFO("\n");
 195         ii->wq = create_workqueue("rt5025_wq");
 196         INIT_DELAYED_WORK(&ii->delayed_work, rt5025_work_func);
 197
 198         #if 0
 199         if (gpio_is_valid(ii->intr_pin))
 200         {
 201                 ret = gpio_request(ii->intr_pin, "rt5025_interrupt");
 202                 if (ret)
 203                         return ret;
 204
 205                 ret = gpio_direction_input(ii->intr_pin);
 206                 if (ret)
 207                         return ret;
 208         #endif
 209
 210                 if (request_irq(ii->irq, rt5025_interrupt, IRQ_TYPE_EDGE_FALLING|IRQF_DISABLED, "RT5025_IRQ", ii))
 211                 {
 212                         dev_err(ii->dev, "couldn't allocate IRQ_NO(%d) !\n", ii->irq);
 213                         return -EINVAL;
 214                 }
 215                 enable_irq_wake(ii->irq);
 216                 queue_delayed_work(ii->wq, &ii->delayed_work, msecs_to_jiffies(100));
 217         #if 0
 218
 219                 if (!gpio_get_value(ii->intr_pin))
 220                 {
 221                         //disable_irq_nosync(ii->irq);
 222                         queue_delayed_work(ii->wq, &ii->delayed_work, 0);
 223                 }
 224         }
 225         else
 226                 return -EINVAL;
 227         #endif
 228
 229         return ret;
 230 }
 231
 232 static void __devexit rt5025_interrupt_deinit(struct rt5025_irq_info* ii)
 233 {
 234         if (ii->irq)
 235                 free_irq(ii->irq, ii);
 236
 237         if (ii->wq)
 238         {
 239                 cancel_delayed_work_sync(&ii->delayed_work);
 240                 flush_workqueue(ii->wq);
 241                 destroy_workqueue(ii->wq);
 242         }
 243 }
 244
 245 static int __devinit rt5025_irq_reg_init(struct rt5025_irq_info* ii, struct rt5025_irq_data* irq_data)
 246 {
 247         RTINFO("\n");
 248         // will just enable the interrupt that we want
 249         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN1, irq_data->irq_enable1.val);
 250         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN2, irq_data->irq_enable2.val);
 251         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN3, irq_data->irq_enable3.val);
 252         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN4, irq_data->irq_enable4.val);
 253         rt5025_reg_write(ii->i2c, RT5025_REG_IRQEN5, irq_data->irq_enable5.val);
 254         return 0;
 255 }
 256
 257 static int __devinit rt5025_irq_probe(struct platform_device *pdev)
 258 {
 259         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
 260         struct rt5025_platform_data *pdata = chip->dev->platform_data;
 261         struct rt5025_irq_info *ii;
 262
 263         RTINFO("\n");
 264         ii = kzalloc(sizeof(*ii), GFP_KERNEL);
 265         if (!ii)
 266                 return -ENOMEM;
 267
 268         ii->i2c = chip->i2c;
 269         ii->dev = &pdev->dev;
 270         ii->chip = chip;
 271         ii->intr_pin = pdata->intr_pin;
 272         ii->irq = chip->irq;//gpio_to_irq(pdata->intr_pin);
 273         if (pdata->cb)
 274                 ii->event_cb = pdata->cb;
 275         wake_lock_init(&ii->irq_wake_lock, WAKE_LOCK_SUSPEND, "rt_irq_wake");
 276         ii->init_once = 1;
 277
 278         rt5025_irq_reg_init(ii, pdata->irq_data);
 279         rt5025_interrupt_init(ii);
 280
 281         platform_set_drvdata(pdev, ii);
 282         RTINFO("\n");
 283         return 0;
 284 }
 285
 286 static int __devexit rt5025_irq_remove(struct platform_device *pdev)
 287 {
 288         struct rt5025_irq_info *ii = platform_get_drvdata(pdev);
 289
 290         wake_lock_destroy(&ii->irq_wake_lock);
 291         rt5025_interrupt_deinit(ii);
 292         platform_set_drvdata(pdev, NULL);
 293         kfree(ii);
 294         RTINFO("\n");
 295         return 0;
 296 }
 297
 298 static void rt5025_irq_shutdown(struct platform_device *pdev)
 299 {
 300         struct rt5025_irq_info *ii = platform_get_drvdata(pdev);
 301
 302         if (ii->irq)
 303                 free_irq(ii->irq, ii);
 304
 305         if (ii->wq)
 306         {
 307                 cancel_delayed_work_sync(&ii->delayed_work);
 308                 flush_workqueue(ii->wq);
 309         }
 310         RTINFO("\n");
 311 }
 312
 313 static int rt5025_irq_suspend(struct platform_device *pdev, pm_message_t state)
 314 {
 315         struct rt5025_irq_info *ii = platform_get_drvdata(pdev);
 316
 317         RTINFO("\n");
 318         ii->suspend = 1;
 319         return 0;
 320 }
 321
 322 static int rt5025_irq_resume(struct platform_device *pdev)
 323 {
 324         struct rt5025_irq_info *ii = platform_get_drvdata(pdev);
 325
 326         RTINFO("\n");
 327         ii->suspend = 0;
 328         return 0;
 329 }
 330
 331 static struct platform_driver rt5025_irq_driver =
 332 {
 333         .driver = {
 334                 .name = RT5025_DEVICE_NAME "-irq",
 335                 .owner = THIS_MODULE,
 336         },
 337         .probe = rt5025_irq_probe,
 338         .remove = __devexit_p(rt5025_irq_remove),
 339         .shutdown = rt5025_irq_shutdown,
 340         .suspend = rt5025_irq_suspend,
 341         .resume = rt5025_irq_resume,
 342 };
 343
 344 static int __init rt5025_irq_init(void)
 345 {
 346         return platform_driver_register(&rt5025_irq_driver);
 347 }
 348 module_init(rt5025_irq_init);
 349
 350 static void __exit rt5025_irq_exit(void)
 351 {
 352         platform_driver_unregister(&rt5025_irq_driver);
 353 }
 354 module_exit(rt5025_irq_exit);
 355
 356 MODULE_LICENSE("GPL v2");
 357 MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
 358 MODULE_DESCRIPTION("IRQ driver for RT5025");
 359 MODULE_ALIAS("platform:" RT5025_DEVICE_NAME "-irq");
 360 MODULE_VERSION(RT5025_DRV_VER);