+++ /dev/null
-/*
- * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
-
- * 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.
- */
-
-/*
- * mpr121.c - Touchkey driver for Freescale MPR121 Capacitive Touch
- * Sensor Controllor
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/i2c/mpr.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/irq.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-
-
-struct mpr121_touchkey_data {
- struct i2c_client *client;
- struct input_dev *input_dev;
- unsigned int key_val;
- int statusbits;
- int keycount;
- u16 keycodes[MPR121_MAX_KEY_COUNT];
-};
-
-struct mpr121_init_register {
- int addr;
- u8 val;
-};
-
-static struct mpr121_init_register init_reg_table[] = {
- {MHD_RISING_ADDR, 0x1},
- {NHD_RISING_ADDR, 0x1},
- {NCL_RISING_ADDR, 0x0},
- {FDL_RISING_ADDR, 0x0},
- {MHD_FALLING_ADDR, 0x1},
- {NHD_FALLING_ADDR, 0x1},
- {NCL_FALLING_ADDR, 0xff},
- {FDL_FALLING_ADDR, 0x02},
- {FILTER_CONF_ADDR, 0x04},
- {AFE_CONF_ADDR, 0x0b},
- {AUTO_CONFIG_CTRL_ADDR, 0x0b},
-};
-
-static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id)
-{
- struct mpr121_touchkey_data *data = dev_id;
- struct i2c_client *client = data->client;
- struct input_dev *input = data->input_dev;
- unsigned int key_num, pressed;
- int reg;
-
- reg = i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_1_ADDR);
- if (reg < 0) {
- dev_err(&client->dev, "i2c read error [%d]\n", reg);
- goto out;
- }
-
- reg <<= 8;
- reg |= i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_0_ADDR);
- if (reg < 0) {
- dev_err(&client->dev, "i2c read error [%d]\n", reg);
- goto out;
- }
-
- reg &= TOUCH_STATUS_MASK;
- /* use old press bit to figure out which bit changed */
- key_num = ffs(reg ^ data->statusbits) - 1;
- /* use the bit check the press status */
- pressed = (reg & (1 << (key_num))) >> key_num;
- data->statusbits = reg;
- data->key_val = data->keycodes[key_num];
-
- input_event(input, EV_MSC, MSC_SCAN, data->key_val);
- input_report_key(input, data->key_val, pressed);
- input_sync(input);
-
- dev_dbg(&client->dev, "key %d %d %s\n", key_num, data->key_val,
- pressed ? "pressed" : "released");
-
-out:
- return IRQ_HANDLED;
-}
-
-static int mpr121_phys_init(struct mpr121_platform_data *pdata,
- struct mpr121_touchkey_data *data,
- struct i2c_client *client)
-{
- struct mpr121_init_register *reg;
- unsigned char usl, lsl, tl;
- int i, t, vdd, ret;
-
- /* setup touch/release threshold for ele0-ele11 */
- for (i = 0; i <= MPR121_MAX_KEY_COUNT; i++) {
- t = ELE0_TOUCH_THRESHOLD_ADDR + (i * 2);
- ret = i2c_smbus_write_byte_data(client, t, TOUCH_THRESHOLD);
- if (ret < 0)
- goto err_i2c_write;
- ret = i2c_smbus_write_byte_data(client, t + 1,
- RELEASE_THRESHOLD);
- if (ret < 0)
- goto err_i2c_write;
- }
- /* setup init register */
- for (i = 0; i < ARRAY_SIZE(init_reg_table); i++) {
- reg = &init_reg_table[i];
- ret = i2c_smbus_write_byte_data(client, reg->addr, reg->val);
- if (ret < 0)
- goto err_i2c_write;
- }
- /* setup auto-register by vdd,the formula please ref:AN3889 */
- vdd = pdata->vdd_uv / 1000;
- usl = ((vdd - 700) * 256) / vdd;
- lsl = (usl * 65) / 100;
- tl = (usl * 90) / 100;
- ret = i2c_smbus_write_byte_data(client, AUTO_CONFIG_USL_ADDR, usl);
- if (ret < 0)
- goto err_i2c_write;
- ret = i2c_smbus_write_byte_data(client, AUTO_CONFIG_LSL_ADDR, lsl);
- if (ret < 0)
- goto err_i2c_write;
- ret = i2c_smbus_write_byte_data(client, AUTO_CONFIG_TL_ADDR, tl);
- if (ret < 0)
- goto err_i2c_write;
- ret = i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR,
- data->keycount);
- if (ret < 0)
- goto err_i2c_write;
-
- dev_info(&client->dev, "mpr121: config as enable %x of electrode.\n",
- data->keycount);
-
- return 0;
-
-err_i2c_write:
- dev_err(&client->dev, "i2c write error[%d]\n", ret);
- return ret;
-}
-
-static int __devinit mpr_touchkey_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct mpr121_platform_data *pdata;
- struct mpr121_touchkey_data *data;
- struct input_dev *input_dev;
- int error;
- int i;
-
- pdata = client->dev.platform_data;
- if (!pdata) {
- dev_err(&client->dev, "no platform data defined\n");
- return -EINVAL;
- }
-
- data = kzalloc(sizeof(struct mpr121_touchkey_data), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!data || !input_dev) {
- dev_err(&client->dev, "Falied to allocate memory\n");
- error = -ENOMEM;
- goto err_free_mem;
- }
-
- data->client = client;
- data->input_dev = input_dev;
- data->keycount = pdata->keycount;
-
- if (data->keycount > MPR121_MAX_KEY_COUNT) {
- dev_err(&client->dev, "Too many key defined\n");
- error = -EINVAL;
- goto err_free_mem;
- }
-
- error = mpr121_phys_init(pdata, data, client);
- if (error < 0) {
- dev_err(&client->dev, "Failed to init register\n");
- goto err_free_mem;
- }
-
- i2c_set_clientdata(client, data);
-
- input_dev->name = "FSL MPR121 Touchkey";
- input_dev->id.bustype = BUS_I2C;
- input_dev->dev.parent = &client->dev;
- input_dev->keycode = pdata->matrix;
- input_dev->keycodesize = sizeof(pdata->matrix[0]);
- input_dev->keycodemax = data->keycount;
-
- for (i = 0; i < input_dev->keycodemax; i++) {
- __set_bit(pdata->matrix[i], input_dev->keybit);
- data->keycodes[i] = pdata->matrix[i];
- }
-
- input_set_capability(input_dev, EV_MSC, MSC_SCAN);
- input_set_drvdata(input_dev, data);
-
- error = request_threaded_irq(client->irq, NULL,
- mpr_touchkey_interrupt,
- IRQF_TRIGGER_FALLING,
- client->dev.driver->name, data);
- if (error) {
- dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_free_mem;
- }
-
- error = input_register_device(input_dev);
- if (error)
- goto err_free_irq;
- i2c_set_clientdata(client, data);
- device_init_wakeup(&client->dev, pdata->wakeup);
- dev_info(&client->dev, "Mpr121 touch keyboard init success.\n");
- return 0;
-
-err_free_irq:
- free_irq(client->irq, data);
-err_free_mem:
- input_free_device(input_dev);
- kfree(data);
- return error;
-}
-
-static int __devexit mpr_touchkey_remove(struct i2c_client *client)
-{
- struct mpr121_touchkey_data *data = i2c_get_clientdata(client);
-
- free_irq(client->irq, data);
- input_unregister_device(data->input_dev);
- kfree(data);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int mpr_suspend(struct i2c_client *client, pm_message_t mesg)
-{
- if (device_may_wakeup(&client->dev))
- enable_irq_wake(client->irq);
-
- i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, 0x00);
-
- return 0;
-}
-
-static int mpr_resume(struct i2c_client *client)
-{
- struct mpr121_touchkey_data *data = i2c_get_clientdata(client);
-
- if (device_may_wakeup(&client->dev))
- disable_irq_wake(client->irq);
-
- i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, data->keycount);
-
- return 0;
-}
-#else
-static int mpr_suspend(struct i2c_client *client, pm_message_t mesg) {}
-static int mpr_resume(struct i2c_client *client) {}
-#endif
-
-static const struct i2c_device_id mpr121_id[] = {
- {"mpr121_touchkey", 0},
- { }
-};
-
-static struct i2c_driver mpr_touchkey_driver = {
- .driver = {
- .name = "mpr121",
- .owner = THIS_MODULE,
- },
- .id_table = mpr121_id,
- .probe = mpr_touchkey_probe,
- .remove = __devexit_p(mpr_touchkey_remove),
- .suspend = mpr_suspend,
- .resume = mpr_resume,
-};
-
-static int __init mpr_touchkey_init(void)
-{
- return i2c_add_driver(&mpr_touchkey_driver);
-}
-
-static void __exit mpr_touchkey_exit(void)
-{
- i2c_del_driver(&mpr_touchkey_driver);
-}
-
-module_init(mpr_touchkey_init);
-module_exit(mpr_touchkey_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Freescale Semiconductor, Inc.");
-MODULE_DESCRIPTION("Touch Key driver for FSL MPR121 Chip");
+++ /dev/null
-/*
- * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
-
- * 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.
- */
-
-/* mpr.h - Header file for Freescale MPR121 Capacitive Touch Sensor Controllor */
-
-#ifndef MPR_H
-#define MPR_H
-
-/* Register definitions */
-#define ELE_TOUCH_STATUS_0_ADDR 0x0
-#define ELE_TOUCH_STATUS_1_ADDR 0X1
-#define MHD_RISING_ADDR 0x2b
-#define NHD_RISING_ADDR 0x2c
-#define NCL_RISING_ADDR 0x2d
-#define FDL_RISING_ADDR 0x2e
-#define MHD_FALLING_ADDR 0x2f
-#define NHD_FALLING_ADDR 0x30
-#define NCL_FALLING_ADDR 0x31
-#define FDL_FALLING_ADDR 0x32
-#define ELE0_TOUCH_THRESHOLD_ADDR 0x41
-#define ELE0_RELEASE_THRESHOLD_ADDR 0x42
-/* ELE0...ELE11's threshold will set in a loop */
-#define AFE_CONF_ADDR 0x5c
-#define FILTER_CONF_ADDR 0x5d
-
-/* ELECTRODE_CONF: this register is most important register, it
- * control how many of electrode is enabled. If you set this register
- * to 0x0, it make the sensor going to suspend mode. Other value(low
- * bit is non-zero) will make the sensor into Run mode. This register
- * should be write at last.
- */
-#define ELECTRODE_CONF_ADDR 0x5e
-#define AUTO_CONFIG_CTRL_ADDR 0x7b
-/* AUTO_CONFIG_USL: Upper Limit for auto baseline search, this
- * register is related to VDD supplied on your board, the value of
- * this register is calc by EQ: `((VDD-0.7)/VDD) * 256`.
- * AUTO_CONFIG_LSL: Low Limit of auto baseline search. This is 65% of
- * USL AUTO_CONFIG_TL: The Traget Level of auto baseline search, This
- * is 90% of USL */
-#define AUTO_CONFIG_USL_ADDR 0x7d
-#define AUTO_CONFIG_LSL_ADDR 0x7e
-#define AUTO_CONFIG_TL_ADDR 0x7f
-
-/* Threshold of touch/release trigger */
-#define TOUCH_THRESHOLD 0x0f
-#define RELEASE_THRESHOLD 0x0a
-/* Mask Button bits of STATUS_0 & STATUS_1 register */
-#define TOUCH_STATUS_MASK 0xfff
-/* MPR121 have 12 electrodes */
-#define MPR121_MAX_KEY_COUNT 12
-
-
-/**
- * @keycount: how many key maped
- * @vdd_uv: voltage of vdd supply the chip in uV
- * @matrix: maxtrix of keys
- * @wakeup: can key wake up system.
- */
-struct mpr121_platform_data {
- u16 keycount;
- u16 *matrix;
- int wakeup;
- int vdd_uv;
-};
-
-#endif
projects / karo-tx-linux.git / commitdiff