1 /* drivers/i2c/chips/mma7660.c - mma7660 compass driver
3 * Copyright (C) 2007-2008 HTC Corporation.
4 * Author: Hou-Kun Chen <houkun.chen@gmail.com>
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include <linux/interrupt.h>
18 #include <linux/i2c.h>
19 #include <linux/slab.h>
20 #include <linux/irq.h>
21 #include <linux/miscdevice.h>
22 #include <linux/gpio.h>
23 #include <asm/uaccess.h>
24 #include <linux/delay.h>
25 #include <linux/input.h>
26 #include <linux/workqueue.h>
27 #include <linux/freezer.h>
28 #include <linux/mma7660.h>
29 #include <mach/gpio.h>
30 #include <mach/board.h>
31 #ifdef CONFIG_ANDROID_POWER
32 #include <linux/android_power.h>
36 //#include <asm/arch/rk28_debug.h>
38 #define rk28printk(x...) printk(x)
40 #define rk28printk(x...)
42 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id);
44 #define MMA7660_SPEED 200 * 1000
46 /* Addresses to scan -- protected by sense_data_mutex */
47 //static char sense_data[RBUFF_SIZE + 1];
48 static struct i2c_client *this_client;
49 static struct miscdevice mma7660_device;
51 static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
53 #ifdef CONFIG_ANDROID_POWER
54 static android_early_suspend_t mma7660_early_suspend;
56 static int revision = -1;
58 static ssize_t gsensor_vendor_show(struct device *dev,
59 struct device_attribute *attr, char *buf)
63 sprintf(buf, "%#x\n", revision);
64 ret = strlen(buf) + 1;
69 static DEVICE_ATTR(vendor, 0444, gsensor_vendor_show, NULL);
71 static struct kobject *android_gsensor_kobj;
73 static int gsensor_sysfs_init(void)
77 android_gsensor_kobj = kobject_create_and_add("android_gsensor", NULL);
78 if (android_gsensor_kobj == NULL) {
80 "MMA7660 gsensor_sysfs_init:"\
81 "subsystem_register failed\n");
86 ret = sysfs_create_file(android_gsensor_kobj, &dev_attr_vendor.attr);
89 "MMA7660 gsensor_sysfs_init:"\
90 "sysfs_create_group failed\n");
96 kobject_del(android_gsensor_kobj);
101 static int mma7660_rx_data(struct i2c_client *client, char *rxData, int length)
104 char reg = rxData[0];
105 ret = i2c_master_reg8_recv(client, reg, rxData, length, MMA7660_SPEED);
106 return (ret > 0)? 0 : ret;
109 static int mma7660_tx_data(struct i2c_client *client, char *txData, int length)
112 char reg = txData[0];
113 ret = i2c_master_reg8_send(client, reg, &txData[1], length-1, MMA7660_SPEED);
114 return (ret > 0)? 0 : ret;
117 static int mma7660_set_rate(struct i2c_client *client, char rate)
124 rk28printk("[ZWP]%s,rate = %d\n",__FUNCTION__,rate);
125 //ÒòΪÔö¼ÓÁËÂ˲¨¹¦ÄÜ,¼´Ã¿RawDataLength´Î²ÅÉϱ¨Ò»´Î,ËùÒÔÌáÉýgsensorÁ½¸öµµ¼¶
128 rk28printk("[ZWP]%s,new rate = %d\n",__FUNCTION__,rate);
131 for (i = 0; i < 7; i++) {
132 if (rate & (0x1 << i))
137 buffer[0] = MMA7660_REG_SR;
138 buffer[1] = 0xf8 | (0x07 & (~i));
140 buffer[0] = MMA7660_REG_SR;
141 buffer[1] = 0xf8 | (0x07 & rate);
143 ret = mma7660_tx_data(client, &(buffer[0]), 2);
144 ret = mma7660_rx_data(client, &(buffer[0]), 1);
149 static int mma7660_start_dev(struct i2c_client *client, char rate)
151 char buffer[MMA7660_REG_LEN];
154 buffer[0] = MMA7660_REG_INTSU;
155 buffer[1] = 0x10; //0x10; modify by zhao
156 ret = mma7660_tx_data(client, &buffer[0], 2);
157 ret = mma7660_rx_data(client, &buffer[0], 1);
159 ret = mma7660_set_rate(client, rate);
161 buffer[0] = MMA7660_REG_MODE;
163 ret = mma7660_tx_data(client, &buffer[0], 2);
164 ret = mma7660_rx_data(client, &buffer[0], 1);
166 enable_irq(client->irq);
167 rk28printk("\n----------------------------mma7660_start------------------------\n");
172 static int mma7660_start(struct i2c_client *client, char rate)
174 struct mma7660_data *mma7660 = (struct mma7660_data *)i2c_get_clientdata(client);
176 if (mma7660->status == MMA7660_OPEN) {
179 mma7660->status = MMA7660_OPEN;
180 return mma7660_start_dev(client, rate);
183 static int mma7660_close_dev(struct i2c_client *client)
187 disable_irq_nosync(client->irq);
189 buffer[0] = MMA7660_REG_MODE;
192 return mma7660_tx_data(client, buffer, 2);
195 static int mma7660_close(struct i2c_client *client)
197 struct mma7660_data *mma7660 = (struct mma7660_data *)i2c_get_clientdata(client);
199 mma7660->status = MMA7660_CLOSE;
201 return mma7660_close_dev(client);
204 static int mma7660_reset_rate(struct i2c_client *client, char rate)
208 rk28printk("\n----------------------------mma7660_reset_rate------------------------\n");
210 ret = mma7660_close_dev(client);
211 ret = mma7660_start_dev(client, rate);
216 static inline int mma7660_convert_to_int(char value)
220 if (value < MMA7660_BOUNDARY) {
221 result = value * MMA7660_GRAVITY_STEP;
223 result = ~(((~value & 0x3f) + 1)* MMA7660_GRAVITY_STEP) + 1;
229 static void mma7660_report_value(struct i2c_client *client, struct mma7660_axis *axis)
231 struct mma7660_data *mma7660 = i2c_get_clientdata(client);
232 //struct mma7660_axis *axis = (struct mma7660_axis *)rbuf;
234 /* Report acceleration sensor information */
235 input_report_abs(mma7660->input_dev, ABS_X, axis->x);
236 input_report_abs(mma7660->input_dev, ABS_Y, axis->y);
237 input_report_abs(mma7660->input_dev, ABS_Z, axis->z);
238 input_sync(mma7660->input_dev);
239 rk28printk("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
242 #define RawDataLength 4
244 int Xaverage, Yaverage, Zaverage;
246 static int mma7660_get_data(struct i2c_client *client)
250 struct mma7660_axis axis;
251 //struct rk2818_gs_platform_data *pdata = client->dev.platform_data;
253 memset(buffer, 0, 3);
254 buffer[0] = MMA7660_REG_X_OUT;
255 ret = mma7660_rx_data(client, &buffer[0], 3);
258 } while ((buffer[0] & 0x40) || (buffer[1] & 0x40) || (buffer[2] & 0x40));
260 axis.x = mma7660_convert_to_int(buffer[MMA7660_REG_X_OUT]);
261 axis.y = -mma7660_convert_to_int(buffer[MMA7660_REG_Y_OUT]);
262 axis.z = -mma7660_convert_to_int(buffer[MMA7660_REG_Z_OUT]);
270 //¼ÆËãRawDataLength´ÎÖµµÄƽ¾ùÖµ
274 rk28printk( "%s: ------------------mma7660_GetData axis = %d %d %d,average=%d %d %d--------------\n",
275 __func__, axis.x, axis.y, axis.z,Xaverage,Yaverage,Zaverage);
277 if((++RawDataNum)>=RawDataLength){
279 axis.x = Xaverage/RawDataLength;
280 axis.y = Yaverage/RawDataLength;
281 axis.z = Zaverage/RawDataLength;
282 mma7660_report_value(client, &axis);
283 Xaverage = Yaverage = Zaverage = 0;
286 // rk28printk( "%s: ------------------mma7660_GetData axis = %d %d %d--------------\n",
287 // __func__, axis.x, axis.y, axis.z);
289 //memcpy(sense_data, &axis, sizeof(axis));
290 mma7660_report_value(client, &axis);
291 //atomic_set(&data_ready, 0);
292 //wake_up(&data_ready_wq);
298 static int mma7660_trans_buff(char *rbuf, int size)
300 //wait_event_interruptible_timeout(data_ready_wq,
301 // atomic_read(&data_ready), 1000);
302 wait_event_interruptible(data_ready_wq,
303 atomic_read(&data_ready));
305 atomic_set(&data_ready, 0);
306 memcpy(rbuf, &sense_data[0], size);
312 static int mma7660_open(struct inode *inode, struct file *file)
314 return 0;//nonseekable_open(inode, file);
317 static int mma7660_release(struct inode *inode, struct file *file)
322 static long mma7660_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
325 void __user *argp = (void __user *)arg;
326 char msg[RBUFF_SIZE + 1];
329 struct i2c_client *client = container_of(mma7660_device.parent, struct i2c_client, dev);
332 case ECS_IOCTL_APP_SET_RATE:
333 if (copy_from_user(&rate, argp, sizeof(rate)))
341 case ECS_IOCTL_START:
342 ret = mma7660_start(client, MMA7660_RATE_32);
346 case ECS_IOCTL_CLOSE:
347 ret = mma7660_close(client);
351 case ECS_IOCTL_APP_SET_RATE:
352 ret = mma7660_reset_rate(client, rate);
357 case ECS_IOCTL_GETDATA:
358 ret = mma7660_trans_buff(msg, RBUFF_SIZE);
368 case ECS_IOCTL_GETDATA:
369 if (copy_to_user(argp, &msg, sizeof(msg)))
379 static void mma7660_work_func(struct work_struct *work)
381 struct mma7660_data *mma7660 = container_of(work, struct mma7660_data, work);
382 struct i2c_client *client = mma7660->client;
384 if (mma7660_get_data(client) < 0)
385 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
387 enable_irq(client->irq);
390 static void mma7660_delaywork_func(struct work_struct *work)
392 struct delayed_work *delaywork = container_of(work, struct delayed_work, work);
393 struct mma7660_data *mma7660 = container_of(delaywork, struct mma7660_data, delaywork);
394 struct i2c_client *client = mma7660->client;
396 if (mma7660_get_data(client) < 0)
397 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
399 enable_irq(client->irq);
402 static irqreturn_t mma7660_interrupt(int irq, void *dev_id)
404 struct mma7660_data *mma7660 = (struct mma7660_data *)dev_id;
406 disable_irq_nosync(irq);
407 schedule_delayed_work(&mma7660->delaywork, msecs_to_jiffies(30));
412 static struct file_operations mma7660_fops = {
413 .owner = THIS_MODULE,
414 .open = mma7660_open,
415 .release = mma7660_release,
416 .unlocked_ioctl = mma7660_ioctl,
419 static struct miscdevice mma7660_device = {
420 .minor = MISC_DYNAMIC_MINOR,
421 .name = "mma8452_daemon",//"mma7660_daemon",
422 .fops = &mma7660_fops,
425 static int mma7660_remove(struct i2c_client *client)
427 struct mma7660_data *mma7660 = i2c_get_clientdata(client);
429 misc_deregister(&mma7660_device);
430 input_unregister_device(mma7660->input_dev);
431 input_free_device(mma7660->input_dev);
432 free_irq(client->irq, mma7660);
434 #ifdef CONFIG_ANDROID_POWER
435 android_unregister_early_suspend(&mma7660_early_suspend);
441 #ifdef CONFIG_ANDROID_POWER
442 static int mma7660_suspend(android_early_suspend_t *h)
444 struct i2c_client *client = container_of(mma7660_device.parent, struct i2c_client, dev);
445 rk28printk("Gsensor mma7760 enter suspend\n");
446 return mma7660_close_dev(client);
449 static int mma7660_resume(android_early_suspend_t *h)
451 struct i2c_client *client = container_of(mma7660_device.parent, struct i2c_client, dev);
452 struct mma7660_data *mma7660 = (struct mma7660_data *)i2c_get_clientdata(client);
453 rk28printk("Gsensor mma7760 resume!!\n");
454 return mma7660_start_dev(mma7660->curr_tate);
457 static int mma7660_suspend(struct i2c_client *client, pm_message_t mesg)
459 rk28printk("Gsensor mma7760 enter 2 level suspend\n");
460 return mma7660_close_dev(client);
462 static int mma7660_resume(struct i2c_client *client)
464 struct mma7660_data *mma7660 = (struct mma7660_data *)i2c_get_clientdata(client);
465 rk28printk("Gsensor mma7760 2 level resume!!\n");
466 return mma7660_start_dev(client, mma7660->curr_tate);
470 static const struct i2c_device_id mma7660_id[] = {
475 static struct i2c_driver mma7660_driver = {
477 .name = "gs_mma7660",
479 .id_table = mma7660_id,
480 .probe = mma7660_probe,
481 .remove = __devexit_p(mma7660_remove),
482 #ifndef CONFIG_ANDROID_POWER
483 .suspend = &mma7660_suspend,
484 .resume = &mma7660_resume,
489 static int mma7660_init_client(struct i2c_client *client)
491 struct mma7660_data *mma7660;
493 mma7660 = i2c_get_clientdata(client);
494 rk28printk("gpio_to_irq(%d) is %d\n",client->irq,gpio_to_irq(client->irq));
495 if ( !gpio_is_valid(client->irq)) {
496 rk28printk("+++++++++++gpio_is_invalid\n");
499 ret = gpio_request(client->irq, "mma7660_int");
501 rk28printk( "failed to request mma7990_trig GPIO%d\n",gpio_to_irq(client->irq));
504 ret = gpio_direction_input(client->irq);
506 rk28printk("failed to set mma7990_trig GPIO gpio input\n");
509 gpio_pull_updown(client->irq, GPIOPullUp);
510 client->irq = gpio_to_irq(client->irq);
511 ret = request_irq(client->irq, mma7660_interrupt, IRQF_TRIGGER_LOW, client->dev.driver->name, mma7660);
512 rk28printk("request irq is %d,ret is 0x%x\n",client->irq,ret);
514 rk28printk(KERN_ERR "mma7660_init_client: request irq failed,ret is %d\n",ret);
517 disable_irq(client->irq);
518 init_waitqueue_head(&data_ready_wq);
523 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id)
525 struct mma7660_data *mma7660;
528 Xaverage = Yaverage = Zaverage = RawDataNum = 0;
530 mma7660 = kzalloc(sizeof(struct mma7660_data), GFP_KERNEL);
532 rk28printk("[mma7660]:alloc data failed.\n");
534 goto exit_alloc_data_failed;
537 INIT_WORK(&mma7660->work, mma7660_work_func);
538 INIT_DELAYED_WORK(&mma7660->delaywork, mma7660_delaywork_func);
540 mma7660->client = client;
542 i2c_set_clientdata(client, mma7660);
544 this_client = client;
546 err = mma7660_init_client(client);
549 "mma7660_probe: mma7660_init_client failed\n");
550 goto exit_request_gpio_irq_failed;
553 mma7660->input_dev = input_allocate_device();
554 if (!mma7660->input_dev) {
557 "mma7660_probe: Failed to allocate input device\n");
558 goto exit_input_allocate_device_failed;
561 set_bit(EV_ABS, mma7660->input_dev->evbit);
563 /* x-axis acceleration */
564 input_set_abs_params(mma7660->input_dev, ABS_X, -MMA7660_RANGE, MMA7660_RANGE, 0, 0);
565 /* y-axis acceleration */
566 input_set_abs_params(mma7660->input_dev, ABS_Y, -MMA7660_RANGE, MMA7660_RANGE, 0, 0);
567 /* z-axis acceleration */
568 input_set_abs_params(mma7660->input_dev, ABS_Z, -MMA7660_RANGE, MMA7660_RANGE, 0, 0);
570 mma7660->input_dev->name = "compass";
571 mma7660->input_dev->dev.parent = &client->dev;
573 err = input_register_device(mma7660->input_dev);
576 "mma7660_probe: Unable to register input device: %s\n",
577 mma7660->input_dev->name);
578 goto exit_input_register_device_failed;
581 mma7660_device.parent = &client->dev;
582 err = misc_register(&mma7660_device);
585 "mma7660_probe: mmad_device register failed\n");
586 goto exit_misc_device_register_mma7660_device_failed;
589 err = gsensor_sysfs_init();
592 "mma7660_probe: gsensor sysfs init failed\n");
593 goto exit_gsensor_sysfs_init_failed;
596 #ifdef CONFIG_ANDROID_POWER
597 mma7660_early_suspend.suspend = mma7660_suspend;
598 mma7660_early_suspend.resume = mma7660_resume;
599 mma7660_early_suspend.level = 0x2;
600 android_register_early_suspend(&mma7660_early_suspend);
602 rk28printk(KERN_INFO "mma7660 probe ok\n");
603 mma7660->status = -1;
605 mma7660_start(client, MMA7660_RATE_32);
609 exit_gsensor_sysfs_init_failed:
610 misc_deregister(&mma7660_device);
611 exit_misc_device_register_mma7660_device_failed:
612 input_unregister_device(mma7660->input_dev);
613 exit_input_register_device_failed:
614 input_free_device(mma7660->input_dev);
615 exit_input_allocate_device_failed:
616 free_irq(client->irq, mma7660);
617 exit_request_gpio_irq_failed:
619 exit_alloc_data_failed:
625 static int __init mma7660_i2c_init(void)
627 return i2c_add_driver(&mma7660_driver);
630 static void __exit mma7660_i2c_exit(void)
632 i2c_del_driver(&mma7660_driver);
635 module_init(mma7660_i2c_init);
636 module_exit(mma7660_i2c_exit);