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