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 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id);
42 #define MMA7660_GPIO_INT RK2818_PIN_PE3
44 /* Addresses to scan -- protected by sense_data_mutex */
45 static char sense_data[RBUFF_SIZE + 1];
46 static struct i2c_client *this_client;
48 static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
49 static atomic_t data_ready;
50 #ifdef CONFIG_ANDROID_POWER
51 static android_early_suspend_t mma7660_early_suspend;
53 static int revision = -1;
55 static ssize_t gsensor_vendor_show(struct device *dev,
56 struct device_attribute *attr, char *buf)
60 sprintf(buf, "%#x\n", revision);
61 ret = strlen(buf) + 1;
66 static DEVICE_ATTR(vendor, 0444, gsensor_vendor_show, NULL);
68 static struct kobject *android_gsensor_kobj;
70 static int gsensor_sysfs_init(void)
74 android_gsensor_kobj = kobject_create_and_add("android_gsensor", NULL);
75 if (android_gsensor_kobj == NULL) {
77 "MMA7660 gsensor_sysfs_init:"\
78 "subsystem_register failed\n");
83 ret = sysfs_create_file(android_gsensor_kobj, &dev_attr_vendor.attr);
86 "MMA7660 gsensor_sysfs_init:"\
87 "sysfs_create_group failed\n");
93 kobject_del(android_gsensor_kobj);
98 static int mma7660_rx_data(char *rxData, int length)
101 struct i2c_msg msgs[] = {
103 .addr = this_client->addr,
110 if (i2c_transfer(this_client->adapter, msgs, 1) < 0) {
111 rk28printk(KERN_ERR "MMA7660 mma7660_rx_data: transfer error\n");
117 struct i2c_adapter *adap = this_client->adapter;
118 struct i2c_msg msgs[2];
120 msgs[0].addr = this_client->addr;
121 msgs[0].buf = (char *)rxData;
122 msgs[0].flags = this_client->flags;
124 msgs[0].scl_rate = 200*1000;
126 msgs[1].addr = this_client->addr;
127 msgs[1].buf = (char *)rxData;
128 msgs[1].flags = this_client->flags | I2C_M_RD;
130 msgs[1].scl_rate = 200*1000;
132 ret = i2c_transfer(adap, msgs, 2);
138 static int mma7660_tx_data(char *txData, int length)
141 struct i2c_msg msg[] = {
143 .addr = this_client->addr,
149 if (i2c_transfer(this_client->adapter, msg, 1) < 0) {
150 rk28printk(KERN_ERR "MMA7660 mma7660_tx_data: transfer error\n");
156 struct i2c_adapter *adap = this_client->adapter;
159 msg.addr = this_client->addr;
162 msg.flags = this_client->flags;
163 msg.scl_rate = 200*1000;
165 ret = i2c_transfer(adap, &msg, 1);
171 static int mma7660_set_rate(char rate)
180 for (i = 0; i < 7; i++) {
181 if (rate & (0x1 << i))
185 buffer[0] = MMA7660_REG_SR;
186 buffer[1] = 0xf8 | (0x07 & (~i));
188 ret = mma7660_tx_data(&(buffer[0]), 2);
193 static int mma7660_start_dev(char rate)
195 char buffer[MMA7660_REG_LEN];
198 buffer[0] = MMA7660_REG_INTSU;
199 buffer[1] = 0x10; //0x10; modify by zhao
200 ret = mma7660_tx_data(&buffer[0], 2);
202 ret = mma7660_set_rate(rate);
204 buffer[0] = MMA7660_REG_MODE;
206 ret = mma7660_tx_data(&buffer[0], 2);
208 rk28printk("\n----------------------------mma7660_start------------------------\n");
213 static int mma7660_start(char rate)
215 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
217 if (mma->status == MMA7660_OPEN) {
220 mma->status = MMA7660_OPEN;
221 return mma7660_start_dev(rate);
224 static int mma7660_close_dev(void)
228 buffer[0] = MMA7660_REG_MODE;
231 return mma7660_tx_data(buffer, 2);
234 static int mma7660_close(void)
236 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
238 mma->status = MMA7660_CLOSE;
240 return mma7660_close_dev();
243 static int mma7660_reset_rate(char rate)
247 ret = mma7660_close_dev();
248 ret = mma7660_start_dev(rate);
253 static inline int mma7660_convert_to_int(char value)
257 if (value < MMA7660_BOUNDARY) {
258 result = value * MMA7660_GRAVITY_STEP;
260 result = ~(((~value & 0x3f) + 1)* MMA7660_GRAVITY_STEP) + 1;
266 static void mma7660_report_value(short *rbuf)
268 struct mma7660_data *data = i2c_get_clientdata(this_client);
269 struct mma7660_axis *axis = (struct mma7660_axis *)rbuf;
271 /* Report acceleration sensor information */
272 input_report_abs(data->input_dev, ABS_X, axis->x);
273 input_report_abs(data->input_dev, ABS_Y, axis->y);
274 input_report_abs(data->input_dev, ABS_Z, axis->z);
275 input_sync(data->input_dev);
276 rk28printk("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
279 static int mma7660_get_data(void)
283 struct mma7660_axis axis;
285 memset(buffer, 0, 3);
286 buffer[0] = MMA7660_REG_X_OUT;
287 ret = mma7660_rx_data(&buffer[0], 3);
288 //while(mma7660_rx_data(&buffer[0], 3));
291 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",
292 __func__, buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5], buffer[6], buffer[7]);
298 axis.x = mma7660_convert_to_int(buffer[MMA7660_REG_X_OUT]);
299 axis.y = -mma7660_convert_to_int(buffer[MMA7660_REG_Y_OUT]);
300 axis.z = -mma7660_convert_to_int(buffer[MMA7660_REG_Z_OUT]);
302 rk28printk( "%s: -------------------------------------------mma7660_GetData axis = %d %d %d-----------------------------------------------\n",
303 __func__, axis.x, axis.y, axis.z);
305 memcpy(sense_data, &axis, sizeof(axis));
306 mma7660_report_value(sense_data);
307 //atomic_set(&data_ready, 0);
308 //wake_up(&data_ready_wq);
313 static int mma7660_trans_buff(char *rbuf, int size)
315 //wait_event_interruptible_timeout(data_ready_wq,
316 // atomic_read(&data_ready), 1000);
317 wait_event_interruptible(data_ready_wq,
318 atomic_read(&data_ready));
320 atomic_set(&data_ready, 0);
321 memcpy(rbuf, &sense_data[0], size);
326 static int mma7660_open(struct inode *inode, struct file *file)
328 rk28printk("----------------------------mma7660_open------------------------\n");
329 return 0;//nonseekable_open(inode, file);
332 static int mma7660_release(struct inode *inode, struct file *file)
337 static int mma7660_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
341 void __user *argp = (void __user *)arg;
342 char msg[RBUFF_SIZE + 1];
346 rk28printk("----------------------------mma7660_ioctl------------------------cmd: %d\n", cmd);
349 case ECS_IOCTL_APP_SET_RATE:
350 if (copy_from_user(&rate, argp, sizeof(rate)))
358 case ECS_IOCTL_START:
359 ret = mma7660_start(MMA7660_RATE_32);
363 case ECS_IOCTL_CLOSE:
364 ret = mma7660_close();
368 case ECS_IOCTL_APP_SET_RATE:
369 ret = mma7660_reset_rate(rate);
373 case ECS_IOCTL_GETDATA:
374 ret = mma7660_trans_buff(msg, RBUFF_SIZE);
383 case ECS_IOCTL_GETDATA:
384 if (copy_to_user(argp, &msg, sizeof(msg)))
394 static void mma7660_work_func(struct work_struct *work)
396 if (mma7660_get_data() < 0)
397 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
399 //GPIOClrearInmarkIntr(MMA7660_GPIO_INT);
401 rk28printk("---------------------------------------mma7660_work_func----------------------------------\n");
404 static void mma7660_delaywork_func(struct work_struct *work)
407 if (mma7660_get_data() < 0)
408 rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
410 //GPIOClrearInmarkIntr(MMA7660_GPIO_INT);
412 rk28printk("---------------------------------------mma7660_delaywork_func------------------------------\n");
416 static irqreturn_t mma7660_interrupt(int irq, void *dev_id)
418 struct mma7660_data *data = dev_id;
420 ///GPIOInmarkIntr(MMA7660_GPIO_INT);
421 //schedule_work(&data->work);
422 schedule_delayed_work(&data->delaywork,msecs_to_jiffies(30));
423 rk28printk("--------------------------------------mma7660_interrupt---------------------------------------\n");
428 static struct file_operations mma7660_fops = {
429 .owner = THIS_MODULE,
430 .open = mma7660_open,
431 .release = mma7660_release,
432 .ioctl = mma7660_ioctl,
435 static struct miscdevice mma7660_device = {
436 .minor = MISC_DYNAMIC_MINOR,
437 .name = "mma7660_daemon",
438 .fops = &mma7660_fops,
441 static int mma7660_remove(struct i2c_client *client)
443 struct mma7660_data *mma = i2c_get_clientdata(client);
445 misc_deregister(&mma7660_device);
446 input_unregister_device(mma->input_dev);
447 input_free_device(mma->input_dev);
448 free_irq(client->irq, mma);
450 #ifdef CONFIG_ANDROID_POWER
451 android_unregister_early_suspend(&mma7660_early_suspend);
457 #ifdef CONFIG_ANDROID_POWER
458 static int mma7660_suspend(android_early_suspend_t *h)
460 rk28printk("Gsensor mma7760 enter suspend\n");
461 return mma7660_close_dev();
464 static int mma7660_resume(android_early_suspend_t *h)
466 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
467 rk28printk("Gsensor mma7760 resume!!\n");
468 return mma7660_start_dev(mma->curr_tate);
471 static int suspend(struct i2c_client *client, pm_message_t mesg)
473 rk28printk("Gsensor mma7760 enter 2 level suspend\n");
474 return mma7660_close_dev();
476 static int resume(struct i2c_client *client)
478 struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
479 rk28printk("Gsensor mma7760 2 level resume!!\n");
480 return mma7660_start_dev(mma->curr_tate);
484 #define mma7660_suspend NULL
485 #define mma7660_resume NULL
488 static const struct i2c_device_id mma7660_id[] = {
493 static struct i2c_driver mma7660_driver = {
495 .name = "gs_mma7660",
497 .id_table = mma7660_id,
498 .probe = mma7660_probe,
499 .remove = __devexit_p(mma7660_remove),
500 //.suspend = &suspend,
505 static int mma7660_init_client(struct i2c_client *client)
507 struct mma7660_data *data;
509 data = i2c_get_clientdata(client);
511 rk28printk("gpio_to_irq(%d) is %d\n",client->irq,gpio_to_irq(client->irq));
512 if ( !gpio_is_valid(client->irq)) {
513 rk28printk("+++++++++++gpio_is_invalid\n");
516 ret = gpio_request(client->irq, "mma7660_int");
518 rk28printk( "failed to request mma7990_trig GPIO%d\n",gpio_to_irq(client->irq));
522 client->irq = gpio_to_irq(client->irq);
523 ret = request_irq(client->irq, mma7660_interrupt, IRQF_TRIGGER_RISING, client->dev.driver->name, data);
524 rk28printk("request irq is %d,ret is 0x%x\n",client->irq,ret);
526 rk28printk(KERN_ERR "mma7660_init_client: request irq failed,ret is %d\n",ret);
529 init_waitqueue_head(&data_ready_wq);
534 static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id)
536 struct mma7660_data *mma;
539 mma = kzalloc(sizeof(struct mma7660_data), GFP_KERNEL);
541 rk28printk("[mma7660]:alloc data failed.\n");
543 goto exit_alloc_data_failed;
546 INIT_WORK(&mma->work, mma7660_work_func);
547 INIT_DELAYED_WORK(&mma->delaywork, mma7660_delaywork_func);
549 mma->client = client;
550 i2c_set_clientdata(client, mma);
552 this_client = client;
554 err = mma7660_init_client(client);
557 "mma7660_probe: mma7660_init_client failed\n");
558 goto exit_request_gpio_irq_failed;
561 mma->input_dev = input_allocate_device();
562 if (!mma->input_dev) {
565 "mma7660_probe: Failed to allocate input device\n");
566 goto exit_input_allocate_device_failed;
569 set_bit(EV_ABS, mma->input_dev->evbit);
571 /* x-axis acceleration */
572 input_set_abs_params(mma->input_dev, ABS_X, -1500, 1500, 0, 0);
573 /* y-axis acceleration */
574 input_set_abs_params(mma->input_dev, ABS_Y, -1500, 1500, 0, 0);
575 /* z-axis acceleration */
576 input_set_abs_params(mma->input_dev, ABS_Z, -1500, 1500, 0, 0);
578 mma->input_dev->name = "compass";
580 err = input_register_device(mma->input_dev);
583 "mma7660_probe: Unable to register input device: %s\n",
584 mma->input_dev->name);
585 goto exit_input_register_device_failed;
588 err = misc_register(&mma7660_device);
591 "mma7660_probe: mmad_device register failed\n");
592 goto exit_misc_device_register_mma7660_device_failed;
595 err = gsensor_sysfs_init();
598 "mma7660_probe: gsensor sysfs init failed\n");
599 goto exit_gsensor_sysfs_init_failed;
602 #ifdef CONFIG_ANDROID_POWER
603 mma7660_early_suspend.suspend = mma7660_suspend;
604 mma7660_early_suspend.resume = mma7660_resume;
605 mma7660_early_suspend.level = 0x2;
606 android_register_early_suspend(&mma7660_early_suspend);
611 exit_gsensor_sysfs_init_failed:
612 misc_deregister(&mma7660_device);
613 exit_misc_device_register_mma7660_device_failed:
614 input_unregister_device(mma->input_dev);
615 exit_input_register_device_failed:
616 input_free_device(mma->input_dev);
617 exit_input_allocate_device_failed:
618 free_irq(client->irq, mma);
619 exit_request_gpio_irq_failed:
621 exit_alloc_data_failed:
627 static int __init mma7660_i2c_init(void)
629 return i2c_add_driver(&mma7660_driver);
632 static void __exit mma7660_i2c_exit(void)
634 i2c_del_driver(&mma7660_driver);
637 module_init(mma7660_i2c_init);
638 module_exit(mma7660_i2c_exit);