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 #ifdef CONFIG_ANDROID_POWER
31 #include <linux/android_power.h>
35 //#include <asm/arch/rk28_debug.h>
37 #define rk28printk(x...) printk(x)
39 #define rk28printk(x...)
41 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id);
43 #define MMA7660_SPEED 200 * 1000
45 /* Addresses to scan -- protected by sense_data_mutex */
46 static char sense_data[RBUFF_SIZE + 1];
47 static struct i2c_client *this_client;
49 static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
50 static atomic_t data_ready;
51 #ifdef CONFIG_ANDROID_POWER
52 static android_early_suspend_t mma7660_early_suspend;
54 static int revision = -1;
56 static ssize_t gsensor_vendor_show(struct device *dev,
57 struct device_attribute *attr, char *buf)
61 sprintf(buf, "%#x\n", revision);
62 ret = strlen(buf) + 1;
67 static DEVICE_ATTR(vendor, 0444, gsensor_vendor_show, NULL);
69 static struct kobject *android_gsensor_kobj;
71 static int gsensor_sysfs_init(void)
75 android_gsensor_kobj = kobject_create_and_add("android_gsensor", NULL);
76 if (android_gsensor_kobj == NULL) {
78 "MMA7660 gsensor_sysfs_init:"\
79 "subsystem_register failed\n");
84 ret = sysfs_create_file(android_gsensor_kobj, &dev_attr_vendor.attr);
87 "MMA7660 gsensor_sysfs_init:"\
88 "sysfs_create_group failed\n");
94 kobject_del(android_gsensor_kobj);
99 static int mma7660_rx_data(char *rxData, int length)
102 char reg = rxData[0];
103 ret = i2c_master_reg8_recv(this_client, reg, rxData, length, MMA7660_SPEED);
104 return (ret > 0)? 0 : ret;
107 static int mma7660_tx_data(char *txData, int length)
110 char reg = txData[0];
111 ret = i2c_master_reg8_send(this_client, reg, &txData[1], length-1, MMA7660_SPEED);
112 return (ret > 0)? 0 : ret;
115 static int mma7660_set_rate(char rate)
124 for (i = 0; i < 7; i++) {
125 if (rate & (0x1 << i))
129 buffer[0] = MMA7660_REG_SR;
130 buffer[1] = 0xf8 | (0x07 & (~i));
132 ret = mma7660_tx_data(&(buffer[0]), 2);
133 ret = mma7660_rx_data(&(buffer[0]), 1);
138 static int mma7660_start_dev(char rate)
140 char buffer[MMA7660_REG_LEN];
143 buffer[0] = MMA7660_REG_INTSU;
144 buffer[1] = 0x10; //0x10; modify by zhao
145 ret = mma7660_tx_data(&buffer[0], 2);
146 ret = mma7660_rx_data(&buffer[0], 1);
148 ret = mma7660_set_rate(rate);
150 buffer[0] = MMA7660_REG_MODE;
152 ret = mma7660_tx_data(&buffer[0], 2);
153 ret = mma7660_rx_data(&buffer[0], 1);
155 enable_irq(this_client->irq);
156 rk28printk("\n----------------------------mma7660_start------------------------\n");
161 static int mma7660_start(char rate)
163 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
165 if (mma->status == MMA7660_OPEN) {
168 mma->status = MMA7660_OPEN;
169 return mma7660_start_dev(rate);
172 static int mma7660_close_dev(void)
176 buffer[0] = MMA7660_REG_MODE;
179 return mma7660_tx_data(buffer, 2);
182 static int mma7660_close(void)
184 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
186 mma->status = MMA7660_CLOSE;
188 return mma7660_close_dev();
191 static int mma7660_reset_rate(char rate)
195 ret = mma7660_close_dev();
196 ret = mma7660_start_dev(rate);
201 static inline int mma7660_convert_to_int(char value)
205 if (value < MMA7660_BOUNDARY) {
206 result = value * MMA7660_GRAVITY_STEP;
208 result = ~(((~value & 0x3f) + 1)* MMA7660_GRAVITY_STEP) + 1;
214 static void mma7660_report_value(short *rbuf)
216 struct mma7660_data *data = i2c_get_clientdata(this_client);
217 struct mma7660_axis *axis = (struct mma7660_axis *)rbuf;
219 /* Report acceleration sensor information */
220 input_report_abs(data->input_dev, ABS_X, axis->x);
221 input_report_abs(data->input_dev, ABS_Y, axis->y);
222 input_report_abs(data->input_dev, ABS_Z, axis->z);
223 input_sync(data->input_dev);
224 rk28printk("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
227 static int mma7660_get_data(void)
231 struct mma7660_axis axis;
233 memset(buffer, 0, 3);
234 buffer[0] = MMA7660_REG_X_OUT;
235 ret = mma7660_rx_data(&buffer[0], 3);
236 //while(mma7660_rx_data(&buffer[0], 3));
239 rk28printk( "%s: -------------------------------------------gsensor device register = [0]:%d [1]:%d [2]:%d [3]:0x%x [4]:0x%x [5]:0x%x [6]:0x%x [7]:0x%x-----------------------------------------------\n",
240 __func__, buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5], buffer[6], buffer[7]);
246 axis.x = mma7660_convert_to_int(buffer[MMA7660_REG_X_OUT]);
247 axis.y = -mma7660_convert_to_int(buffer[MMA7660_REG_Y_OUT]);
248 axis.z = -mma7660_convert_to_int(buffer[MMA7660_REG_Z_OUT]);
250 rk28printk( "%s: -------------------------------------------mma7660_GetData axis = %d %d %d-----------------------------------------------\n",
251 __func__, axis.x, axis.y, axis.z);
253 memcpy(sense_data, &axis, sizeof(axis));
254 mma7660_report_value(sense_data);
255 //atomic_set(&data_ready, 0);
256 //wake_up(&data_ready_wq);
261 static int mma7660_trans_buff(char *rbuf, int size)
263 //wait_event_interruptible_timeout(data_ready_wq,
264 // atomic_read(&data_ready), 1000);
265 wait_event_interruptible(data_ready_wq,
266 atomic_read(&data_ready));
268 atomic_set(&data_ready, 0);
269 memcpy(rbuf, &sense_data[0], size);
274 static int mma7660_open(struct inode *inode, struct file *file)
276 rk28printk("----------------------------mma7660_open------------------------\n");
277 return 0;//nonseekable_open(inode, file);
280 static int mma7660_release(struct inode *inode, struct file *file)
285 static int mma7660_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
289 void __user *argp = (void __user *)arg;
290 char msg[RBUFF_SIZE + 1];
294 rk28printk("----------------------------mma7660_ioctl------------------------cmd: %d\n", cmd);
297 case ECS_IOCTL_APP_SET_RATE:
298 if (copy_from_user(&rate, argp, sizeof(rate)))
306 case ECS_IOCTL_START:
307 ret = mma7660_start(MMA7660_RATE_32);
311 case ECS_IOCTL_CLOSE:
312 ret = mma7660_close();
316 case ECS_IOCTL_APP_SET_RATE:
317 ret = mma7660_reset_rate(rate);
321 case ECS_IOCTL_GETDATA:
322 ret = mma7660_trans_buff(msg, RBUFF_SIZE);
331 case ECS_IOCTL_GETDATA:
332 if (copy_to_user(argp, &msg, sizeof(msg)))
342 static void mma7660_work_func(struct work_struct *work)
344 if (mma7660_get_data() < 0)
345 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
347 enable_irq(this_client->irq);
348 rk28printk("---------------------------------------mma7660_work_func----------------------------------\n");
351 static void mma7660_delaywork_func(struct work_struct *work)
354 if (mma7660_get_data() < 0)
355 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
356 enable_irq(this_client->irq);
357 rk28printk("---------------------------------------mma7660_delaywork_func------------------------------\n");
361 static irqreturn_t mma7660_interrupt(int irq, void *dev_id)
363 struct mma7660_data *data = dev_id;
364 disable_irq_nosync(this_client->irq);
365 schedule_delayed_work(&data->delaywork,msecs_to_jiffies(30));
366 rk28printk("--------------------------------------mma7660_interrupt---------------------------------------\n");
371 static struct file_operations mma7660_fops = {
372 .owner = THIS_MODULE,
373 .open = mma7660_open,
374 .release = mma7660_release,
375 .ioctl = mma7660_ioctl,
378 static struct miscdevice mma7660_device = {
379 .minor = MISC_DYNAMIC_MINOR,
380 .name = "mma7660_daemon",
381 .fops = &mma7660_fops,
384 static int mma7660_remove(struct i2c_client *client)
386 struct mma7660_data *mma = i2c_get_clientdata(client);
388 misc_deregister(&mma7660_device);
389 input_unregister_device(mma->input_dev);
390 input_free_device(mma->input_dev);
391 free_irq(client->irq, mma);
393 #ifdef CONFIG_ANDROID_POWER
394 android_unregister_early_suspend(&mma7660_early_suspend);
400 #ifdef CONFIG_ANDROID_POWER
401 static int mma7660_suspend(android_early_suspend_t *h)
403 rk28printk("Gsensor mma7760 enter suspend\n");
404 return mma7660_close_dev();
407 static int mma7660_resume(android_early_suspend_t *h)
409 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
410 rk28printk("Gsensor mma7760 resume!!\n");
411 return mma7660_start_dev(mma->curr_tate);
414 static int suspend(struct i2c_client *client, pm_message_t mesg)
416 rk28printk("Gsensor mma7760 enter 2 level suspend\n");
417 return mma7660_close_dev();
419 static int resume(struct i2c_client *client)
421 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
422 rk28printk("Gsensor mma7760 2 level resume!!\n");
423 return mma7660_start_dev(mma->curr_tate);
427 #define mma7660_suspend NULL
428 #define mma7660_resume NULL
431 static const struct i2c_device_id mma7660_id[] = {
436 static struct i2c_driver mma7660_driver = {
438 .name = "gs_mma7660",
440 .id_table = mma7660_id,
441 .probe = mma7660_probe,
442 .remove = __devexit_p(mma7660_remove),
443 //.suspend = &suspend,
448 static int mma7660_init_client(struct i2c_client *client)
450 struct mma7660_data *data;
452 data = i2c_get_clientdata(client);
453 rk28printk("gpio_to_irq(%d) is %d\n",client->irq,gpio_to_irq(client->irq));
454 if ( !gpio_is_valid(client->irq)) {
455 rk28printk("+++++++++++gpio_is_invalid\n");
458 ret = gpio_request(client->irq, "mma7660_int");
460 rk28printk( "failed to request mma7990_trig GPIO%d\n",gpio_to_irq(client->irq));
463 client->irq = gpio_to_irq(client->irq);
464 ret = request_irq(client->irq, mma7660_interrupt, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, client->dev.driver->name, data);
465 rk28printk("request irq is %d,ret is 0x%x\n",client->irq,ret);
467 rk28printk(KERN_ERR "mma7660_init_client: request irq failed,ret is %d\n",ret);
470 disable_irq(client->irq);
471 init_waitqueue_head(&data_ready_wq);
476 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id)
478 struct mma7660_data *mma;
481 mma = kzalloc(sizeof(struct mma7660_data), GFP_KERNEL);
483 rk28printk("[mma7660]:alloc data failed.\n");
485 goto exit_alloc_data_failed;
488 INIT_WORK(&mma->work, mma7660_work_func);
489 INIT_DELAYED_WORK(&mma->delaywork, mma7660_delaywork_func);
491 mma->client = client;
492 i2c_set_clientdata(client, mma);
494 this_client = client;
496 err = mma7660_init_client(client);
499 "mma7660_probe: mma7660_init_client failed\n");
500 goto exit_request_gpio_irq_failed;
503 mma->input_dev = input_allocate_device();
504 if (!mma->input_dev) {
507 "mma7660_probe: Failed to allocate input device\n");
508 goto exit_input_allocate_device_failed;
511 set_bit(EV_ABS, mma->input_dev->evbit);
513 /* x-axis acceleration */
514 input_set_abs_params(mma->input_dev, ABS_X, -1500, 1500, 0, 0);
515 /* y-axis acceleration */
516 input_set_abs_params(mma->input_dev, ABS_Y, -1500, 1500, 0, 0);
517 /* z-axis acceleration */
518 input_set_abs_params(mma->input_dev, ABS_Z, -1500, 1500, 0, 0);
520 mma->input_dev->name = "compass";
522 err = input_register_device(mma->input_dev);
525 "mma7660_probe: Unable to register input device: %s\n",
526 mma->input_dev->name);
527 goto exit_input_register_device_failed;
530 err = misc_register(&mma7660_device);
533 "mma7660_probe: mmad_device register failed\n");
534 goto exit_misc_device_register_mma7660_device_failed;
537 err = gsensor_sysfs_init();
540 "mma7660_probe: gsensor sysfs init failed\n");
541 goto exit_gsensor_sysfs_init_failed;
544 #ifdef CONFIG_ANDROID_POWER
545 mma7660_early_suspend.suspend = mma7660_suspend;
546 mma7660_early_suspend.resume = mma7660_resume;
547 mma7660_early_suspend.level = 0x2;
548 android_register_early_suspend(&mma7660_early_suspend);
550 rk28printk(KERN_INFO "mma7660 probe ok\n");
552 mma7660_start(MMA7660_RATE_32);
555 exit_gsensor_sysfs_init_failed:
556 misc_deregister(&mma7660_device);
557 exit_misc_device_register_mma7660_device_failed:
558 input_unregister_device(mma->input_dev);
559 exit_input_register_device_failed:
560 input_free_device(mma->input_dev);
561 exit_input_allocate_device_failed:
562 free_irq(client->irq, mma);
563 exit_request_gpio_irq_failed:
565 exit_alloc_data_failed:
571 static int __init mma7660_i2c_init(void)
573 return i2c_add_driver(&mma7660_driver);
576 static void __exit mma7660_i2c_exit(void)
578 i2c_del_driver(&mma7660_driver);
581 module_init(mma7660_i2c_init);
582 module_exit(mma7660_i2c_exit);