770 lines
17 KiB
C
770 lines
17 KiB
C
/* board-htcleo-microp.c
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* Copyright (C) 2009 Google.
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* Copyright (C) 2009 HTC Corporation.
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*
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* The Microp on htcleo is an i2c device that supports
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* the following functions
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* - G-sensor
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* - Proximity (capella cm3602)
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* - Interrupts
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#include <linux/workqueue.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/miscdevice.h>
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#include <linux/input.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/mutex.h>
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#include <linux/jiffies.h>
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#include <linux/wakelock.h>
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#include <linux/earlysuspend.h>
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#include <linux/bma150.h>
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#include <asm/uaccess.h>
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#include <asm/mach-types.h>
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#include <asm/mach/mmc.h>
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#include <asm/setup.h>
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#include <mach/htc_pwrsink.h>
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#include <mach/board-htcleo-microp.h>
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#include "board-htcleo.h"
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static uint32_t microp_als_kadc;
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static int als_power_control=0;
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static DEFINE_MUTEX(capella_cm3602_lock);
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extern void p_sensor_irq_handler(void);
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static char *hex2string(uint8_t *data, int len)
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{
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static char buf[101];
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int i;
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i = (sizeof(buf) - 1) / 4;
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if (len > i)
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len = i;
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for (i = 0; i < len; i++)
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sprintf(buf + i * 4, "[%02X]", data[i]);
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return buf;
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}
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#define I2C_READ_RETRY_TIMES 10
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#define I2C_WRITE_RETRY_TIMES 10
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static int i2c_read_block(struct i2c_client *client, uint8_t addr,
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uint8_t *data, int length)
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{
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int retry;
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struct microp_i2c_client_data *cdata;
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 1,
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.buf = &addr,
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},
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = length,
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.buf = data,
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}
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};
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cdata = i2c_get_clientdata(client);
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mutex_lock(&cdata->microp_i2c_rw_mutex);
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hr_msleep(1);
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for (retry = 0; retry <= I2C_READ_RETRY_TIMES; retry++) {
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if (i2c_transfer(client->adapter, msgs, 2) == 2)
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break;
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msleep(5);
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}
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mutex_unlock(&cdata->microp_i2c_rw_mutex);
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dev_dbg(&client->dev, "R [%02X] = %s\n",
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addr, hex2string(data, length));
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if (retry > I2C_READ_RETRY_TIMES) {
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dev_err(&client->dev, "i2c_read_block retry over %d\n",
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I2C_READ_RETRY_TIMES);
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return -EIO;
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}
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return 0;
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}
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#define MICROP_I2C_WRITE_BLOCK_SIZE 21
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static int i2c_write_block(struct i2c_client *client, uint8_t addr,
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uint8_t *data, int length)
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{
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int retry;
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uint8_t buf[MICROP_I2C_WRITE_BLOCK_SIZE];
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struct microp_i2c_client_data *cdata;
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struct i2c_msg msg[] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = length + 1,
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.buf = buf,
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}
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};
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cdata = i2c_get_clientdata(client);
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dev_dbg(&client->dev, "W [%02X] = %s\n", addr,
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hex2string(data, length));
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if (length + 1 > MICROP_I2C_WRITE_BLOCK_SIZE) {
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dev_err(&client->dev, "i2c_write_block length too long\n");
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return -E2BIG;
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}
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buf[0] = addr;
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memcpy((void *)&buf[1], (void *)data, length);
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// mdelay(1);
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// Cotulla: extra delay
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// msleep(10);
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mutex_lock(&cdata->microp_i2c_rw_mutex);
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hr_msleep(1);
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for (retry = 0; retry <= I2C_WRITE_RETRY_TIMES; retry++) {
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if (i2c_transfer(client->adapter, msg, 1) == 1)
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break;
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msleep(5);
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}
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if (retry > I2C_WRITE_RETRY_TIMES) {
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dev_err(&client->dev, "i2c_write_block retry over %d\n",
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I2C_WRITE_RETRY_TIMES);
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mutex_unlock(&cdata->microp_i2c_rw_mutex);
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return -EIO;
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}
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mutex_unlock(&cdata->microp_i2c_rw_mutex);
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return 0;
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}
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int microp_i2c_read(uint8_t addr, uint8_t *data, int length)
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{
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struct i2c_client *client = private_microp_client;
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if (!client) {
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printk(KERN_ERR "%s: dataset: client is empty\n", __func__);
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return -EIO;
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}
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if (i2c_read_block(client, addr, data, length) < 0) {
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dev_err(&client->dev, "%s: write microp i2c fail\n", __func__);
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return -EIO;
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}
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return 0;
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}
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EXPORT_SYMBOL(microp_i2c_read);
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int microp_i2c_write(uint8_t addr, uint8_t *data, int length)
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{
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struct i2c_client *client = private_microp_client;
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if (!client) {
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printk(KERN_ERR "%s: dataset: client is empty\n", __func__);
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return -EIO;
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}
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if (i2c_write_block(client, addr, data, length) < 0) {
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dev_err(&client->dev, "%s: write microp i2c fail\n", __func__);
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return -EIO;
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}
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return 0;
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}
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EXPORT_SYMBOL(microp_i2c_write);
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static int microp_spi_enable(uint8_t on)
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{
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struct i2c_client *client;
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int ret;
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client = private_microp_client;
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ret = i2c_write_block(client, MICROP_I2C_WCMD_SPI_EN, &on, 1);
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if (ret < 0) {
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dev_err(&client->dev,"%s: i2c_write_block fail\n", __func__);
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return ret;
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}
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msleep(10);
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return ret;
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}
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int microp_spi_vote_enable(int spi_device, uint8_t enable)
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{
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// Only a dummy for the bma_150 driver, enable only the SPI
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int ret;
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ret=0;
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ret = microp_spi_enable(enable);
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return ret;
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}
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static int microp_read_adc(uint8_t channel, uint16_t *value)
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{
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struct i2c_client *client;
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int ret;
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uint8_t cmd[2], data[2];
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client = private_microp_client;
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cmd[0] = 0;
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cmd[1] = 1; //channel;
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// ret = i2c_write_block(client, MICROP_I2C_WCMD_READ_ADC_REQ, cmd, 2);
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ret = i2c_write_block(client, MICROP_I2C_WCMD_READ_ADC_VALUE_REQ, cmd, 2);
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if (ret < 0) {
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dev_err(&client->dev, "%s: request adc fail\n", __func__);
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return -EIO;
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}
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ret = i2c_read_block(client, MICROP_I2C_RCMD_ADC_VALUE, data, 2);
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if (ret < 0) {
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dev_err(&client->dev, "%s: read adc fail\n", __func__);
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return -EIO;
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}
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*value = data[0] << 8 | data[1];
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return 0;
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}
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/**
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* GPI functions
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**/
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static int microp_read_gpi_status(struct i2c_client *client, uint16_t *status)
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{
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uint8_t data[2];
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int ret;
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ret = i2c_read_block(client, MICROP_I2C_RCMD_GPIO_STATUS, data, 2);
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if (ret < 0) {
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dev_err(&client->dev, "%s: read failed\n", __func__);
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return -EIO;
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}
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*status = (data[0] << 8) | data[1];
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return 0;
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}
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static int microp_interrupt_get_status(uint16_t *interrupt_mask)
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{
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uint8_t data[2];
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int ret = -1;
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ret = microp_i2c_read(MICROP_I2C_RCMD_GPI_INT_STATUS, data, 2);
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if (ret < 0) {
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pr_err("%s: read interrupt status fail\n", __func__);
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return ret;
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}
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*interrupt_mask = data[0]<<8 | data[1];
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return 0;
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}
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static int microp_interrupt_enable( uint16_t interrupt_mask)
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{
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uint8_t data[2];
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int ret = -1;
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data[0] = interrupt_mask >> 8;
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data[1] = interrupt_mask & 0xFF;
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ret = microp_i2c_write(MICROP_I2C_WCMD_GPI_INT_CTL_EN, data, 2);
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if (ret < 0)
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pr_err("%s: enable 0x%x interrupt failed\n", __func__, interrupt_mask);
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return ret;
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}
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static int microp_interrupt_disable(uint16_t interrupt_mask)
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{
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uint8_t data[2];
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int ret = -1;
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data[0] = interrupt_mask >> 8;
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data[1] = interrupt_mask & 0xFF;
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ret = microp_i2c_write(MICROP_I2C_WCMD_GPI_INT_CTL_DIS, data, 2);
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if (ret < 0)
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pr_err("%s: disable 0x%x interrupt failed\n", __func__, interrupt_mask);
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return ret;
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}
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/**
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* GPO functions TODO
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**/
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int microp_read_gpo_status(uint16_t *status)
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{
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uint8_t data[2];
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int ret;
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struct i2c_client *client;
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client = private_microp_client;
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ret = i2c_read_block(client, MICROP_I2C_RCMD_GPIO_STATUS, data, 2);
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if (ret < 0)
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{
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dev_err(&client->dev, "%s: read failed\n", __func__);
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return -EIO;
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}
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*status = (data[0] << 8) | data[1];
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return 0;
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}
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EXPORT_SYMBOL(microp_read_gpo_status);
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int microp_gpo_enable(uint16_t gpo_mask)
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{
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uint8_t data[2];
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int ret = -1;
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struct i2c_client *client;
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client = private_microp_client;
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data[0] = gpo_mask >> 8;
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data[1] = gpo_mask & 0xFF;
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ret = i2c_write_block(client, MICROP_I2C_WCMD_GPO_LED_STATUS_EN, data, 2);
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if (ret < 0)
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dev_err(&client->dev, "%s: enable 0x%x interrupt failed\n", __func__, gpo_mask);
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return ret;
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}
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EXPORT_SYMBOL(microp_gpo_enable);
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int microp_gpo_disable(uint16_t gpo_mask)
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{
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uint8_t data[2];
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int ret = -1;
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struct i2c_client *client;
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client = private_microp_client;
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data[0] = gpo_mask >> 8;
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data[1] = gpo_mask & 0xFF;
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ret = i2c_write_block(client, MICROP_I2C_WCMD_GPO_LED_STATUS_DIS, data, 2);
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if (ret < 0)
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dev_err(&client->dev, "%s: disable 0x%x interrupt failed\n", __func__, gpo_mask);
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return ret;
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}
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EXPORT_SYMBOL(microp_gpo_disable);
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int capella_cm3602_power(int pwr_device, uint8_t enable)
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{
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unsigned int old_status = 0;
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uint16_t interrupts = 0;
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int ret = 0, on = 0;
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mutex_lock(&capella_cm3602_lock);
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if(pwr_device==PS_PWR_ON) { // Switch the Proximity IRQ
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if(enable) {
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microp_gpo_enable(PS_PWR_ON);
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ret = microp_interrupt_get_status(&interrupts);
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if (ret < 0) {
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pr_err("%s: read interrupt status fail\n", __func__);
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return ret;
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}
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interrupts |= IRQ_PROXIMITY;
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ret = microp_interrupt_enable(interrupts);
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}
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else {
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interrupts |= IRQ_PROXIMITY;
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ret = microp_interrupt_disable(interrupts);
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microp_gpo_disable(PS_PWR_ON);
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}
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if (ret < 0) {
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pr_err("%s: failed to enable gpi irqs\n", __func__);
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return ret;
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}
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}
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old_status = als_power_control;
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if (enable)
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als_power_control |= pwr_device;
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else
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als_power_control &= ~pwr_device;
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on = als_power_control ? 1 : 0;
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if (old_status == 0 && on)
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microp_gpo_enable(LS_PWR_ON);
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else if (!on)
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microp_gpo_disable(LS_PWR_ON);
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mutex_unlock(&capella_cm3602_lock);
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return ret;
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}
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/*
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* Interrupt
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*/
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static irqreturn_t microp_i2c_intr_irq_handler(int irq, void *dev_id)
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{
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struct i2c_client *client;
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struct microp_i2c_client_data *cdata;
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client = to_i2c_client(dev_id);
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cdata = i2c_get_clientdata(client);
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dev_dbg(&client->dev, "intr_irq_handler\n");
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disable_irq_nosync(client->irq);
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schedule_work(&cdata->work.work);
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return IRQ_HANDLED;
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}
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static void microp_i2c_intr_work_func(struct work_struct *work)
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{
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struct microp_i2c_work *up_work;
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struct i2c_client *client;
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struct microp_i2c_client_data *cdata;
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uint8_t data[3];
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uint16_t intr_status = 0;
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int ret = 0;
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up_work = container_of(work, struct microp_i2c_work, work);
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client = up_work->client;
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cdata = i2c_get_clientdata(client);
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ret = microp_interrupt_get_status(&intr_status);
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if (ret < 0) {
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dev_err(&client->dev, "%s: read interrupt status fail\n",
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__func__);
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}
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ret = i2c_write_block(client, MICROP_I2C_WCMD_GPI_INT_STATUS_CLR, data, 2);
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if (ret < 0) {
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dev_err(&client->dev, "%s: clear interrupt status fail\n",
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__func__);
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}
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if (intr_status & IRQ_PROXIMITY) {
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p_sensor_irq_handler();
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}
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enable_irq(client->irq);
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}
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static int microp_function_initialize(struct i2c_client *client)
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{
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struct microp_i2c_client_data *cdata;
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uint16_t stat, interrupts = 0;
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int ret;
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cdata = i2c_get_clientdata(client);
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/* enable the interrupts */
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ret = microp_interrupt_enable(interrupts);
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if (ret < 0) {
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dev_err(&client->dev, "%s: failed to enable gpi irqs\n",
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__func__);
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goto err_irq_en;
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}
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microp_read_gpi_status(client, &stat);
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return 0;
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err_irq_en:
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return ret;
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}
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#ifdef CONFIG_HAS_EARLYSUSPEND
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void microp_early_suspend(struct early_suspend *h)
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{
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struct microp_i2c_client_data *cdata;
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struct i2c_client *client = private_microp_client;
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int ret;
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if (!client) {
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pr_err("%s: dataset: client is empty\n", __func__);
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return;
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}
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cdata = i2c_get_clientdata(client);
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cdata->microp_is_suspend = 1;
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disable_irq(client->irq);
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ret = cancel_work_sync(&cdata->work.work);
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if (ret != 0) {
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enable_irq(client->irq);
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}
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}
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void microp_early_resume(struct early_suspend *h)
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{
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struct i2c_client *client = private_microp_client;
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struct microp_i2c_client_data *cdata;
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if (!client) {
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pr_err("%s: dataset: client is empty\n", __func__);
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return;
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}
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cdata = i2c_get_clientdata(client);
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cdata->microp_is_suspend = 0;
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|
enable_irq(client->irq);
|
|
}
|
|
#endif
|
|
|
|
static int microp_i2c_suspend(struct i2c_client *client,
|
|
pm_message_t mesg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int microp_i2c_resume(struct i2c_client *client)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void register_microp_devices(struct platform_device *devices, int num)
|
|
{
|
|
int i;
|
|
for (i = 0; i < num; i++) {
|
|
platform_device_register(devices + i);
|
|
dev_set_drvdata(&(devices + i)->dev, private_microp_client);
|
|
}
|
|
}
|
|
|
|
static int microp_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct microp_i2c_platform_data *pdata;
|
|
struct microp_i2c_client_data *cdata;
|
|
uint8_t data[6];
|
|
int ret;
|
|
|
|
cdata = kzalloc(sizeof(struct microp_i2c_client_data), GFP_KERNEL);
|
|
if (!cdata) {
|
|
ret = -ENOMEM;
|
|
dev_err(&client->dev, "failed on allocat cdata\n");
|
|
goto err_cdata;
|
|
}
|
|
i2c_set_clientdata(client, cdata);
|
|
|
|
private_microp_client = client;
|
|
pdata = client->dev.platform_data;
|
|
if (!pdata) {
|
|
ret = -EBUSY;
|
|
dev_err(&client->dev, "failed on get pdata\n");
|
|
goto err_exit;
|
|
}
|
|
pdata->dev_id = (void *)&client->dev;
|
|
cdata->gpio_reset=pdata->gpio_reset;
|
|
|
|
mutex_init(&cdata->microp_i2c_rw_mutex);
|
|
|
|
ret = i2c_read_block(client, MICROP_I2C_RCMD_VERSION, data, 2);
|
|
if (ret || !(data[0] && data[1])) {
|
|
ret = -ENODEV;
|
|
dev_err(&client->dev, "failed on get microp version\n");
|
|
goto err_exit;
|
|
}
|
|
dev_info(&client->dev, "microp version [%02X][%02X]\n",
|
|
data[0], data[1]);
|
|
|
|
ret = gpio_request(pdata->gpio_reset, "microp_i2c_wm");
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "failed on request gpio reset\n");
|
|
goto err_exit;
|
|
}
|
|
ret = gpio_direction_output(pdata->gpio_reset, 1);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev,
|
|
"failed on gpio_direction_output reset\n");
|
|
goto err_gpio_reset;
|
|
}
|
|
|
|
cdata->version = data[0] << 8 | data[1];
|
|
cdata->microp_is_suspend = 0;
|
|
|
|
wake_lock_init(µp_i2c_wakelock, WAKE_LOCK_SUSPEND,
|
|
"microp_i2c_present");
|
|
|
|
register_microp_devices(pdata->microp_devices, pdata->num_devices);
|
|
|
|
/* Setup IRQ handler */
|
|
INIT_WORK(&cdata->work.work, microp_i2c_intr_work_func);
|
|
cdata->work.client = client;
|
|
|
|
ret = request_irq(client->irq,
|
|
microp_i2c_intr_irq_handler,
|
|
IRQF_TRIGGER_LOW,
|
|
"microp_interrupt",
|
|
&client->dev);
|
|
if (ret) {
|
|
dev_err(&client->dev, "request_irq failed\n");
|
|
goto err_intr;
|
|
}
|
|
ret = set_irq_wake(client->irq, 1);
|
|
if (ret) {
|
|
dev_err(&client->dev, "set_irq_wake failed\n");
|
|
goto err_intr;
|
|
}
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
if (cdata->enable_early_suspend) {
|
|
cdata->early_suspend.level =
|
|
EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
|
|
cdata->early_suspend.suspend = microp_early_suspend;
|
|
cdata->early_suspend.resume = microp_early_resume;
|
|
register_early_suspend(&cdata->early_suspend);
|
|
}
|
|
#endif
|
|
|
|
ret = microp_function_initialize(client);
|
|
if (ret) {
|
|
dev_err(&client->dev, "failed on microp function initialize\n");
|
|
goto err_fun_init;
|
|
}
|
|
|
|
dev_info(&client->dev, "Init Done\n");
|
|
return 0;
|
|
|
|
err_fun_init:
|
|
err_intr:
|
|
wake_lock_destroy(µp_i2c_wakelock);
|
|
kfree(cdata);
|
|
i2c_set_clientdata(client, NULL);
|
|
|
|
err_cdata:
|
|
err_gpio_reset:
|
|
gpio_free(pdata->gpio_reset);
|
|
err_exit:
|
|
dev_info(&client->dev, "Init Error\n");
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit microp_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct microp_i2c_client_data *cdata;
|
|
|
|
cdata = i2c_get_clientdata(client);
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
if (cdata->enable_early_suspend) {
|
|
unregister_early_suspend(&cdata->early_suspend);
|
|
}
|
|
#endif
|
|
|
|
free_irq(client->irq, &client->dev);
|
|
|
|
gpio_free(cdata->gpio_reset);
|
|
|
|
kfree(cdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define ATAG_ALS 0x5441001b
|
|
static int __init parse_tag_microp_als_kadc(const struct tag *tags)
|
|
{
|
|
int found = 0;
|
|
struct tag *t = (struct tag *)tags;
|
|
|
|
for (; t->hdr.size; t = tag_next(t)) {
|
|
if (t->hdr.tag == ATAG_ALS) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found)
|
|
microp_als_kadc = t->u.revision.rev;
|
|
pr_debug("%s: microp_als_kadc = 0x%x\n", __func__, microp_als_kadc);
|
|
return 0;
|
|
}
|
|
__tagtable(ATAG_ALS, parse_tag_microp_als_kadc);
|
|
|
|
static const struct i2c_device_id microp_i2c_id[] =
|
|
{
|
|
{ MICROP_I2C_NAME, 0 },
|
|
{ }
|
|
};
|
|
|
|
static struct i2c_driver microp_i2c_driver =
|
|
{
|
|
.driver = {
|
|
.name = MICROP_I2C_NAME,
|
|
},
|
|
.id_table = microp_i2c_id,
|
|
.probe = microp_i2c_probe,
|
|
.suspend = microp_i2c_suspend,
|
|
.resume = microp_i2c_resume,
|
|
.remove = __devexit_p(microp_i2c_remove),
|
|
};
|
|
|
|
static int __init microp_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(µp_i2c_driver);
|
|
}
|
|
|
|
static void __exit microp_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(µp_i2c_driver);
|
|
}
|
|
|
|
module_init(microp_i2c_init);
|
|
module_exit(microp_i2c_exit);
|
|
|
|
MODULE_AUTHOR("Eric Olsen <eolsen@android.com>");
|
|
MODULE_DESCRIPTION("MicroP I2C driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int micropklt_dbg_leds_set(void *dat, u64 val)
|
|
{
|
|
struct i2c_client *client;
|
|
char buffer[3] = { 0, 0, 0 };
|
|
int r;
|
|
|
|
client = private_microp_client;
|
|
|
|
buffer[0] = 0xff & (val >> 8);
|
|
buffer[1] = 0xff & (val >> 16);
|
|
buffer[2] = 0xff & (val >> 24);
|
|
r =i2c_write_block(client, 0xff & val, buffer, 3);
|
|
return r;
|
|
}
|
|
|
|
static int micropklt_dbg_leds_get(void *data, u64 *val) {
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(micropklt_dbg_leds_fops,
|
|
micropklt_dbg_leds_get,
|
|
micropklt_dbg_leds_set, "%llu\n");
|
|
|
|
|
|
static int __init micropklt_dbg_init(void)
|
|
{
|
|
struct dentry *dent;
|
|
|
|
dent = debugfs_create_dir("micropklt", 0);
|
|
if (IS_ERR(dent))
|
|
return PTR_ERR(dent);
|
|
|
|
debugfs_create_file("raw", 0444, dent, NULL,
|
|
µpklt_dbg_leds_fops);
|
|
return 0;
|
|
}
|
|
|
|
device_initcall(micropklt_dbg_init);
|
|
|