--- /dev/null
+/* drivers/i2c/chips/mma7660.c - mma7660 compass driver
+ *
+ * Copyright (C) 2007-2008 HTC Corporation.
+ * Author: Hou-Kun Chen <houkun.chen@gmail.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/miscdevice.h>
+#include <linux/gpio.h>
+#include <asm/uaccess.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/freezer.h>
+#include <linux/mma7660.h>
+#include <mach/gpio.h>
+#ifdef CONFIG_ANDROID_POWER
+#include <linux/android_power.h>
+#endif
+
+//#define RK28_PRINT
+//#include <asm/arch/rk28_debug.h>
+
+#define rk28printk(x...) printk(x)
+
+static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id);
+
+
+#define MMA7660_GPIO_INT RK2818_PIN_PE3
+
+/* Addresses to scan -- protected by sense_data_mutex */
+static char sense_data[RBUFF_SIZE + 1];
+static struct i2c_client *this_client;
+
+static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
+static atomic_t data_ready;
+#ifdef CONFIG_ANDROID_POWER
+static android_early_suspend_t mma7660_early_suspend;
+#endif
+static int revision = -1;
+/* AKM HW info */
+static ssize_t gsensor_vendor_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t ret = 0;
+
+ sprintf(buf, "%#x\n", revision);
+ ret = strlen(buf) + 1;
+
+ return ret;
+}
+
+static DEVICE_ATTR(vendor, 0444, gsensor_vendor_show, NULL);
+
+static struct kobject *android_gsensor_kobj;
+
+static int gsensor_sysfs_init(void)
+{
+ int ret ;
+
+ android_gsensor_kobj = kobject_create_and_add("android_gsensor", NULL);
+ if (android_gsensor_kobj == NULL) {
+ rk28printk(KERN_ERR
+ "MMA7660 gsensor_sysfs_init:"\
+ "subsystem_register failed\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sysfs_create_file(android_gsensor_kobj, &dev_attr_vendor.attr);
+ if (ret) {
+ rk28printk(KERN_ERR
+ "MMA7660 gsensor_sysfs_init:"\
+ "sysfs_create_group failed\n");
+ goto err4;
+ }
+
+ return 0 ;
+err4:
+ kobject_del(android_gsensor_kobj);
+err:
+ return ret ;
+}
+
+static int mma7660_rx_data(char *rxData, int length)
+{
+#if 0
+ struct i2c_msg msgs[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 1,
+ .len = length,
+ .buf = rxData,
+ },
+ };
+
+ if (i2c_transfer(this_client->adapter, msgs, 1) < 0) {
+ rk28printk(KERN_ERR "MMA7660 mma7660_rx_data: transfer error\n");
+ return -EIO;
+ } else
+ return 0;
+#else
+ int ret;
+ struct i2c_adapter *adap = this_client->adapter;
+ struct i2c_msg msgs[2];
+
+ msgs[0].addr = this_client->addr;
+ msgs[0].buf = (char *)rxData;
+ msgs[0].flags = this_client->flags;
+ msgs[0].len = 1;
+ msgs[0].scl_rate = 200*1000;
+
+ msgs[1].addr = this_client->addr;
+ msgs[1].buf = (char *)rxData;
+ msgs[1].flags = this_client->flags | I2C_M_RD;
+ msgs[1].len = 3;
+ msgs[1].scl_rate = 200*1000;
+
+ ret = i2c_transfer(adap, msgs, 2);
+
+ return ret;
+#endif
+}
+
+static int mma7660_tx_data(char *txData, int length)
+{
+#if 0
+ struct i2c_msg msg[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 0,
+ .len = length,
+ .buf = txData,
+ },
+ };
+ if (i2c_transfer(this_client->adapter, msg, 1) < 0) {
+ rk28printk(KERN_ERR "MMA7660 mma7660_tx_data: transfer error\n");
+ return -EIO;
+ } else
+ return 0;
+#else
+ int ret;
+ struct i2c_adapter *adap = this_client->adapter;
+ struct i2c_msg msg;
+
+ msg.addr = this_client->addr;
+ msg.buf = txData;
+ msg.len = length;
+ msg.flags = this_client->flags;
+ msg.scl_rate = 200*1000;
+
+ ret = i2c_transfer(adap, &msg, 1);
+
+ return ret;
+#endif
+}
+
+static int mma7660_set_rate(char rate)
+{
+ char buffer[2];
+ int ret = 0;
+ int i;
+
+ if (rate > 128)
+ return -EINVAL;
+
+ for (i = 0; i < 7; i++) {
+ if (rate & (0x1 << i))
+ break;
+ }
+
+ buffer[0] = MMA7660_REG_SR;
+ buffer[1] = 0xf8 | (0x07 & (~i));
+
+ ret = mma7660_tx_data(&(buffer[0]), 2);
+
+ return ret;
+}
+
+static int mma7660_start_dev(char rate)
+{
+ char buffer[MMA7660_REG_LEN];
+ int ret = 0;
+
+ buffer[0] = MMA7660_REG_INTSU;
+ buffer[1] = 0x10; //0x10; modify by zhao
+ ret = mma7660_tx_data(&buffer[0], 2);
+
+ ret = mma7660_set_rate(rate);
+
+ buffer[0] = MMA7660_REG_MODE;
+ buffer[1] = 0x81;
+ ret = mma7660_tx_data(&buffer[0], 2);
+
+ rk28printk("\n----------------------------mma7660_start------------------------\n");
+
+ return ret;
+}
+
+static int mma7660_start(char rate)
+{
+ struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
+
+ if (mma->status == MMA7660_OPEN) {
+ return 0;
+ }
+ mma->status = MMA7660_OPEN;
+ return mma7660_start_dev(rate);
+}
+
+static int mma7660_close_dev(void)
+{
+ char buffer[2];
+
+ buffer[0] = MMA7660_REG_MODE;
+ buffer[1] = 0x00;
+
+ return mma7660_tx_data(buffer, 2);
+}
+
+static int mma7660_close(void)
+{
+ struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
+
+ mma->status = MMA7660_CLOSE;
+
+ return mma7660_close_dev();
+}
+
+static int mma7660_reset_rate(char rate)
+{
+ int ret = 0;
+
+ ret = mma7660_close_dev();
+ ret = mma7660_start_dev(rate);
+
+ return ret ;
+}
+
+static inline int mma7660_convert_to_int(char value)
+{
+ int result;
+
+ if (value < MMA7660_BOUNDARY) {
+ result = value * MMA7660_GRAVITY_STEP;
+ } else {
+ result = ~(((~value & 0x3f) + 1)* MMA7660_GRAVITY_STEP) + 1;
+ }
+
+ return result;
+}
+
+static void mma7660_report_value(short *rbuf)
+{
+ struct mma7660_data *data = i2c_get_clientdata(this_client);
+ struct mma7660_axis *axis = (struct mma7660_axis *)rbuf;
+
+ /* Report acceleration sensor information */
+ input_report_abs(data->input_dev, ABS_X, axis->x);
+ input_report_abs(data->input_dev, ABS_Y, axis->y);
+ input_report_abs(data->input_dev, ABS_Z, axis->z);
+ input_sync(data->input_dev);
+ rk28printk("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
+}
+
+static int mma7660_get_data(void)
+{
+ char buffer[3];
+ int ret;
+ struct mma7660_axis axis;
+
+ memset(buffer, 0, 3);
+ buffer[0] = MMA7660_REG_X_OUT;
+ ret = mma7660_rx_data(&buffer[0], 3);
+ //while(mma7660_rx_data(&buffer[0], 3));
+ /*
+ if (!ret) {
+ 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",
+ __func__, buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5], buffer[6], buffer[7]);
+ }
+ */
+ if (ret < 0)
+ return ret;
+
+ axis.x = mma7660_convert_to_int(buffer[MMA7660_REG_X_OUT]);
+ axis.y = -mma7660_convert_to_int(buffer[MMA7660_REG_Y_OUT]);
+ axis.z = -mma7660_convert_to_int(buffer[MMA7660_REG_Z_OUT]);
+
+ rk28printk( "%s: -------------------------------------------mma7660_GetData axis = %d %d %d-----------------------------------------------\n",
+ __func__, axis.x, axis.y, axis.z);
+
+ memcpy(sense_data, &axis, sizeof(axis));
+ mma7660_report_value(sense_data);
+ //atomic_set(&data_ready, 0);
+ //wake_up(&data_ready_wq);
+
+ return 0;
+}
+
+static int mma7660_trans_buff(char *rbuf, int size)
+{
+ //wait_event_interruptible_timeout(data_ready_wq,
+ // atomic_read(&data_ready), 1000);
+ wait_event_interruptible(data_ready_wq,
+ atomic_read(&data_ready));
+
+ atomic_set(&data_ready, 0);
+ memcpy(rbuf, &sense_data[0], size);
+
+ return 0;
+}
+
+static int mma7660_open(struct inode *inode, struct file *file)
+{
+ rk28printk("----------------------------mma7660_open------------------------\n");
+ return 0;//nonseekable_open(inode, file);
+}
+
+static int mma7660_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static int mma7660_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+
+ void __user *argp = (void __user *)arg;
+ char msg[RBUFF_SIZE + 1];
+ int ret = -1;
+ char rate;
+
+ rk28printk("----------------------------mma7660_ioctl------------------------cmd: %d\n", cmd);
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_SET_RATE:
+ if (copy_from_user(&rate, argp, sizeof(rate)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_START:
+ ret = mma7660_start(MMA7660_RATE_32);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_CLOSE:
+ ret = mma7660_close();
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_APP_SET_RATE:
+ ret = mma7660_reset_rate(rate);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_GETDATA:
+ ret = mma7660_trans_buff(msg, RBUFF_SIZE);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_GETDATA:
+ if (copy_to_user(argp, &msg, sizeof(msg)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void mma7660_work_func(struct work_struct *work)
+{
+ if (mma7660_get_data() < 0)
+ rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
+
+ //GPIOClrearInmarkIntr(MMA7660_GPIO_INT);
+
+ rk28printk("---------------------------------------mma7660_work_func----------------------------------\n");
+}
+
+static void mma7660_delaywork_func(struct work_struct *work)
+{
+
+ if (mma7660_get_data() < 0)
+ rk28printk(KERN_ERR "MMA7660 mma_work_func: Get data failed\n");
+
+ //GPIOClrearInmarkIntr(MMA7660_GPIO_INT);
+
+ rk28printk("---------------------------------------mma7660_delaywork_func------------------------------\n");
+
+}
+
+static irqreturn_t mma7660_interrupt(int irq, void *dev_id)
+{
+ struct mma7660_data *data = dev_id;
+
+ ///GPIOInmarkIntr(MMA7660_GPIO_INT);
+ //schedule_work(&data->work);
+ schedule_delayed_work(&data->delaywork,msecs_to_jiffies(30));
+ rk28printk("--------------------------------------mma7660_interrupt---------------------------------------\n");
+
+ return IRQ_HANDLED;
+}
+
+static struct file_operations mma7660_fops = {
+ .owner = THIS_MODULE,
+ .open = mma7660_open,
+ .release = mma7660_release,
+ .ioctl = mma7660_ioctl,
+};
+
+static struct miscdevice mma7660_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "mma7660_daemon",
+ .fops = &mma7660_fops,
+};
+
+static int mma7660_remove(struct i2c_client *client)
+{
+ struct mma7660_data *mma = i2c_get_clientdata(client);
+
+ misc_deregister(&mma7660_device);
+ input_unregister_device(mma->input_dev);
+ input_free_device(mma->input_dev);
+ free_irq(client->irq, mma);
+ kfree(mma);
+#ifdef CONFIG_ANDROID_POWER
+ android_unregister_early_suspend(&mma7660_early_suspend);
+#endif
+ this_client = NULL;
+ return 0;
+}
+
+#ifdef CONFIG_ANDROID_POWER
+static int mma7660_suspend(android_early_suspend_t *h)
+{
+ rk28printk("Gsensor mma7760 enter suspend\n");
+ return mma7660_close_dev();
+}
+
+static int mma7660_resume(android_early_suspend_t *h)
+{
+ struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
+ rk28printk("Gsensor mma7760 resume!!\n");
+ return mma7660_start_dev(mma->curr_tate);
+}
+/*
+static int suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ rk28printk("Gsensor mma7760 enter 2 level suspend\n");
+ return mma7660_close_dev();
+}
+static int resume(struct i2c_client *client)
+{
+ struct mma7660_data *mma = (struct mma7660_data *)i2c_get_clientdata(this_client);
+ rk28printk("Gsensor mma7760 2 level resume!!\n");
+ return mma7660_start_dev(mma->curr_tate);
+}
+*/
+#else
+#define mma7660_suspend NULL
+#define mma7660_resume NULL
+#endif
+
+static const struct i2c_device_id mma7660_id[] = {
+ {"gs_mma7660", 0},
+ { }
+};
+
+static struct i2c_driver mma7660_driver = {
+ .driver = {
+ .name = "gs_mma7660",
+ },
+ .id_table = mma7660_id,
+ .probe = mma7660_probe,
+ .remove = __devexit_p(mma7660_remove),
+ //.suspend = &suspend,
+ //.resume = &resume,
+};
+
+
+static int mma7660_init_client(struct i2c_client *client)
+{
+ struct mma7660_data *data;
+ int ret;
+ data = i2c_get_clientdata(client);
+
+ rk28printk("gpio_to_irq(%d) is %d\n",client->irq,gpio_to_irq(client->irq));
+ if ( !gpio_is_valid(client->irq)) {
+ rk28printk("+++++++++++gpio_is_invalid\n");
+ return -EINVAL;
+ }
+ ret = gpio_request(client->irq, "mma7660_int");
+ if (ret) {
+ rk28printk( "failed to request mma7990_trig GPIO%d\n",gpio_to_irq(client->irq));
+ return ret;
+ }
+
+ client->irq = gpio_to_irq(client->irq);
+ ret = request_irq(client->irq, mma7660_interrupt, IRQF_TRIGGER_RISING, client->dev.driver->name, data);
+ rk28printk("request irq is %d,ret is 0x%x\n",client->irq,ret);
+ if (ret ) {
+ rk28printk(KERN_ERR "mma7660_init_client: request irq failed,ret is %d\n",ret);
+ return ret;
+ }
+ init_waitqueue_head(&data_ready_wq);
+
+ return 0;
+}
+
+static int mma7660_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct mma7660_data *mma;
+ int err;
+
+ mma = kzalloc(sizeof(struct mma7660_data), GFP_KERNEL);
+ if (!mma) {
+ rk28printk("[mma7660]:alloc data failed.\n");
+ err = -ENOMEM;
+ goto exit_alloc_data_failed;
+ }
+
+ INIT_WORK(&mma->work, mma7660_work_func);
+ INIT_DELAYED_WORK(&mma->delaywork, mma7660_delaywork_func);
+
+ mma->client = client;
+ i2c_set_clientdata(client, mma);
+
+ this_client = client;
+
+ err = mma7660_init_client(client);
+ if (err < 0) {
+ rk28printk(KERN_ERR
+ "mma7660_probe: mma7660_init_client failed\n");
+ goto exit_request_gpio_irq_failed;
+ }
+
+ mma->input_dev = input_allocate_device();
+ if (!mma->input_dev) {
+ err = -ENOMEM;
+ rk28printk(KERN_ERR
+ "mma7660_probe: Failed to allocate input device\n");
+ goto exit_input_allocate_device_failed;
+ }
+
+ set_bit(EV_ABS, mma->input_dev->evbit);
+
+ /* x-axis acceleration */
+ input_set_abs_params(mma->input_dev, ABS_X, -1500, 1500, 0, 0);
+ /* y-axis acceleration */
+ input_set_abs_params(mma->input_dev, ABS_Y, -1500, 1500, 0, 0);
+ /* z-axis acceleration */
+ input_set_abs_params(mma->input_dev, ABS_Z, -1500, 1500, 0, 0);
+
+ mma->input_dev->name = "compass";
+
+ err = input_register_device(mma->input_dev);
+ if (err < 0) {
+ rk28printk(KERN_ERR
+ "mma7660_probe: Unable to register input device: %s\n",
+ mma->input_dev->name);
+ goto exit_input_register_device_failed;
+ }
+
+ err = misc_register(&mma7660_device);
+ if (err < 0) {
+ rk28printk(KERN_ERR
+ "mma7660_probe: mmad_device register failed\n");
+ goto exit_misc_device_register_mma7660_device_failed;
+ }
+
+ err = gsensor_sysfs_init();
+ if (err < 0) {
+ rk28printk(KERN_ERR
+ "mma7660_probe: gsensor sysfs init failed\n");
+ goto exit_gsensor_sysfs_init_failed;
+ }
+
+#ifdef CONFIG_ANDROID_POWER
+ mma7660_early_suspend.suspend = mma7660_suspend;
+ mma7660_early_suspend.resume = mma7660_resume;
+ mma7660_early_suspend.level = 0x2;
+ android_register_early_suspend(&mma7660_early_suspend);
+#endif
+
+ return 0;
+
+exit_gsensor_sysfs_init_failed:
+ misc_deregister(&mma7660_device);
+exit_misc_device_register_mma7660_device_failed:
+ input_unregister_device(mma->input_dev);
+exit_input_register_device_failed:
+ input_free_device(mma->input_dev);
+exit_input_allocate_device_failed:
+ free_irq(client->irq, mma);
+exit_request_gpio_irq_failed:
+ kfree(mma);
+exit_alloc_data_failed:
+ ;
+ return err;
+}
+
+
+static int __init mma7660_i2c_init(void)
+{
+ return i2c_add_driver(&mma7660_driver);
+}
+
+static void __exit mma7660_i2c_exit(void)
+{
+ i2c_del_driver(&mma7660_driver);
+}
+
+module_init(mma7660_i2c_init);
+module_exit(mma7660_i2c_exit);
+
+
+
projects / firefly-linux-kernel-4.4.55.git / commitdiff