diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/mpr121_touchkey.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/mpr121_touchkey.c | 337 |
1 files changed, 0 insertions, 337 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/mpr121_touchkey.c b/ANDROID_3.4.5/drivers/input/keyboard/mpr121_touchkey.c deleted file mode 100644 index caa218a5..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/mpr121_touchkey.c +++ /dev/null @@ -1,337 +0,0 @@ -/* - * Touchkey driver for Freescale MPR121 Controllor - * - * Copyright (C) 2011 Freescale Semiconductor, Inc. - * Author: Zhang Jiejing <jiejing.zhang@freescale.com> - * - * Based on mcs_touchkey.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/input.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/bitops.h> -#include <linux/interrupt.h> -#include <linux/i2c/mpr121_touchkey.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 -#define AFE_CONF_ADDR 0x5c -#define FILTER_CONF_ADDR 0x5d - -/* - * ELECTRODE_CONF_ADDR: This register configures the number of - * enabled capacitance sensing inputs and its run/suspend mode. - */ -#define ELECTRODE_CONF_ADDR 0x5e -#define ELECTRODE_CONF_QUICK_CHARGE 0x80 -#define AUTO_CONFIG_CTRL_ADDR 0x7b -#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 0x08 -#define RELEASE_THRESHOLD 0x05 -/* Masks for touch and release triggers */ -#define TOUCH_STATUS_MASK 0xfff -/* MPR121 has 12 keys */ -#define MPR121_MAX_KEY_COUNT 12 - -struct mpr121_touchkey { - struct i2c_client *client; - struct input_dev *input_dev; - unsigned int key_val; - unsigned int statusbits; - unsigned int keycount; - u16 keycodes[MPR121_MAX_KEY_COUNT]; -}; - -struct mpr121_init_register { - int addr; - u8 val; -}; - -static const struct mpr121_init_register init_reg_table[] __devinitconst = { - { MHD_RISING_ADDR, 0x1 }, - { NHD_RISING_ADDR, 0x1 }, - { 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 *mpr121 = dev_id; - struct i2c_client *client = mpr121->client; - struct input_dev *input = mpr121->input_dev; - unsigned int key_num, key_val, 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 ^ mpr121->statusbits) - 1; - pressed = reg & (1 << key_num); - mpr121->statusbits = reg; - - key_val = mpr121->keycodes[key_num]; - - input_event(input, EV_MSC, MSC_SCAN, key_num); - input_report_key(input, key_val, pressed); - input_sync(input); - - dev_dbg(&client->dev, "key %d %d %s\n", key_num, key_val, - pressed ? "pressed" : "released"); - -out: - return IRQ_HANDLED; -} - -static int __devinit mpr121_phys_init(const struct mpr121_platform_data *pdata, - struct mpr121_touchkey *mpr121, - struct i2c_client *client) -{ - const struct mpr121_init_register *reg; - unsigned char usl, lsl, tl, eleconf; - int i, t, vdd, ret; - - /* Set up 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; - } - - /* Set up 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; - } - - - /* - * Capacitance on sensing input varies and needs to be compensated. - * The internal MPR121-auto-configuration can do this if it's - * registers are set properly (based on pdata->vdd_uv). - */ - 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); - ret |= i2c_smbus_write_byte_data(client, AUTO_CONFIG_LSL_ADDR, lsl); - ret |= i2c_smbus_write_byte_data(client, AUTO_CONFIG_TL_ADDR, tl); - - /* - * Quick charge bit will let the capacitive charge to ready - * state quickly, or the buttons may not function after system - * boot. - */ - eleconf = mpr121->keycount | ELECTRODE_CONF_QUICK_CHARGE; - ret |= i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, - eleconf); - if (ret != 0) - goto err_i2c_write; - - dev_dbg(&client->dev, "set up with %x keys.\n", mpr121->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) -{ - const struct mpr121_platform_data *pdata = client->dev.platform_data; - struct mpr121_touchkey *mpr121; - struct input_dev *input_dev; - int error; - int i; - - if (!pdata) { - dev_err(&client->dev, "no platform data defined\n"); - return -EINVAL; - } - - if (!pdata->keymap || !pdata->keymap_size) { - dev_err(&client->dev, "missing keymap data\n"); - return -EINVAL; - } - - if (pdata->keymap_size > MPR121_MAX_KEY_COUNT) { - dev_err(&client->dev, "too many keys defined\n"); - return -EINVAL; - } - - if (!client->irq) { - dev_err(&client->dev, "irq number should not be zero\n"); - return -EINVAL; - } - - mpr121 = kzalloc(sizeof(struct mpr121_touchkey), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!mpr121 || !input_dev) { - dev_err(&client->dev, "Failed to allocate memory\n"); - error = -ENOMEM; - goto err_free_mem; - } - - mpr121->client = client; - mpr121->input_dev = input_dev; - mpr121->keycount = pdata->keymap_size; - - input_dev->name = "Freescale MPR121 Touchkey"; - input_dev->id.bustype = BUS_I2C; - input_dev->dev.parent = &client->dev; - input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); - - input_dev->keycode = mpr121->keycodes; - input_dev->keycodesize = sizeof(mpr121->keycodes[0]); - input_dev->keycodemax = mpr121->keycount; - - for (i = 0; i < pdata->keymap_size; i++) { - input_set_capability(input_dev, EV_KEY, pdata->keymap[i]); - mpr121->keycodes[i] = pdata->keymap[i]; - } - - error = mpr121_phys_init(pdata, mpr121, client); - if (error) { - dev_err(&client->dev, "Failed to init register\n"); - goto err_free_mem; - } - - error = request_threaded_irq(client->irq, NULL, - mpr_touchkey_interrupt, - IRQF_TRIGGER_FALLING, - client->dev.driver->name, mpr121); - 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, mpr121); - device_init_wakeup(&client->dev, pdata->wakeup); - - return 0; - -err_free_irq: - free_irq(client->irq, mpr121); -err_free_mem: - input_free_device(input_dev); - kfree(mpr121); - return error; -} - -static int __devexit mpr_touchkey_remove(struct i2c_client *client) -{ - struct mpr121_touchkey *mpr121 = i2c_get_clientdata(client); - - free_irq(client->irq, mpr121); - input_unregister_device(mpr121->input_dev); - kfree(mpr121); - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int mpr_suspend(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - - 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 device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct mpr121_touchkey *mpr121 = i2c_get_clientdata(client); - - if (device_may_wakeup(&client->dev)) - disable_irq_wake(client->irq); - - i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, - mpr121->keycount); - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(mpr121_touchkey_pm_ops, mpr_suspend, mpr_resume); - -static const struct i2c_device_id mpr121_id[] = { - { "mpr121_touchkey", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, mpr121_id); - -static struct i2c_driver mpr_touchkey_driver = { - .driver = { - .name = "mpr121", - .owner = THIS_MODULE, - .pm = &mpr121_touchkey_pm_ops, - }, - .id_table = mpr121_id, - .probe = mpr_touchkey_probe, - .remove = __devexit_p(mpr_touchkey_remove), -}; - -module_i2c_driver(mpr_touchkey_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Zhang Jiejing <jiejing.zhang@freescale.com>"); -MODULE_DESCRIPTION("Touch Key driver for Freescale MPR121 Chip"); |