diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/tca8418_keypad.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/tca8418_keypad.c | 430 |
1 files changed, 0 insertions, 430 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/tca8418_keypad.c b/ANDROID_3.4.5/drivers/input/keyboard/tca8418_keypad.c deleted file mode 100644 index 958ec107..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/tca8418_keypad.c +++ /dev/null @@ -1,430 +0,0 @@ -/* - * Driver for TCA8418 I2C keyboard - * - * Copyright (C) 2011 Fuel7, Inc. All rights reserved. - * - * Author: Kyle Manna <kyle.manna@fuel7.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License v2 as published by the Free Software Foundation. - * - * 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. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - * - * If you can't comply with GPLv2, alternative licensing terms may be - * arranged. Please contact Fuel7, Inc. (http://fuel7.com/) for proprietary - * alternative licensing inquiries. - */ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/gpio.h> -#include <linux/i2c.h> -#include <linux/input.h> -#include <linux/input/tca8418_keypad.h> - -/* TCA8418 hardware limits */ -#define TCA8418_MAX_ROWS 8 -#define TCA8418_MAX_COLS 10 - -/* TCA8418 register offsets */ -#define REG_CFG 0x01 -#define REG_INT_STAT 0x02 -#define REG_KEY_LCK_EC 0x03 -#define REG_KEY_EVENT_A 0x04 -#define REG_KEY_EVENT_B 0x05 -#define REG_KEY_EVENT_C 0x06 -#define REG_KEY_EVENT_D 0x07 -#define REG_KEY_EVENT_E 0x08 -#define REG_KEY_EVENT_F 0x09 -#define REG_KEY_EVENT_G 0x0A -#define REG_KEY_EVENT_H 0x0B -#define REG_KEY_EVENT_I 0x0C -#define REG_KEY_EVENT_J 0x0D -#define REG_KP_LCK_TIMER 0x0E -#define REG_UNLOCK1 0x0F -#define REG_UNLOCK2 0x10 -#define REG_GPIO_INT_STAT1 0x11 -#define REG_GPIO_INT_STAT2 0x12 -#define REG_GPIO_INT_STAT3 0x13 -#define REG_GPIO_DAT_STAT1 0x14 -#define REG_GPIO_DAT_STAT2 0x15 -#define REG_GPIO_DAT_STAT3 0x16 -#define REG_GPIO_DAT_OUT1 0x17 -#define REG_GPIO_DAT_OUT2 0x18 -#define REG_GPIO_DAT_OUT3 0x19 -#define REG_GPIO_INT_EN1 0x1A -#define REG_GPIO_INT_EN2 0x1B -#define REG_GPIO_INT_EN3 0x1C -#define REG_KP_GPIO1 0x1D -#define REG_KP_GPIO2 0x1E -#define REG_KP_GPIO3 0x1F -#define REG_GPI_EM1 0x20 -#define REG_GPI_EM2 0x21 -#define REG_GPI_EM3 0x22 -#define REG_GPIO_DIR1 0x23 -#define REG_GPIO_DIR2 0x24 -#define REG_GPIO_DIR3 0x25 -#define REG_GPIO_INT_LVL1 0x26 -#define REG_GPIO_INT_LVL2 0x27 -#define REG_GPIO_INT_LVL3 0x28 -#define REG_DEBOUNCE_DIS1 0x29 -#define REG_DEBOUNCE_DIS2 0x2A -#define REG_DEBOUNCE_DIS3 0x2B -#define REG_GPIO_PULL1 0x2C -#define REG_GPIO_PULL2 0x2D -#define REG_GPIO_PULL3 0x2E - -/* TCA8418 bit definitions */ -#define CFG_AI BIT(7) -#define CFG_GPI_E_CFG BIT(6) -#define CFG_OVR_FLOW_M BIT(5) -#define CFG_INT_CFG BIT(4) -#define CFG_OVR_FLOW_IEN BIT(3) -#define CFG_K_LCK_IEN BIT(2) -#define CFG_GPI_IEN BIT(1) -#define CFG_KE_IEN BIT(0) - -#define INT_STAT_CAD_INT BIT(4) -#define INT_STAT_OVR_FLOW_INT BIT(3) -#define INT_STAT_K_LCK_INT BIT(2) -#define INT_STAT_GPI_INT BIT(1) -#define INT_STAT_K_INT BIT(0) - -/* TCA8418 register masks */ -#define KEY_LCK_EC_KEC 0x7 -#define KEY_EVENT_CODE 0x7f -#define KEY_EVENT_VALUE 0x80 - - -static const struct i2c_device_id tca8418_id[] = { - { TCA8418_NAME, 8418, }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tca8418_id); - -struct tca8418_keypad { - unsigned int rows; - unsigned int cols; - unsigned int keypad_mask; /* Mask for keypad col/rol regs */ - unsigned int irq; - unsigned int row_shift; - - struct i2c_client *client; - struct input_dev *input; - - /* Flexible array member, must be at end of struct */ - unsigned short keymap[]; -}; - -/* - * Write a byte to the TCA8418 - */ -static int tca8418_write_byte(struct tca8418_keypad *keypad_data, - int reg, u8 val) -{ - int error; - - error = i2c_smbus_write_byte_data(keypad_data->client, reg, val); - if (error < 0) { - dev_err(&keypad_data->client->dev, - "%s failed, reg: %d, val: %d, error: %d\n", - __func__, reg, val, error); - return error; - } - - return 0; -} - -/* - * Read a byte from the TCA8418 - */ -static int tca8418_read_byte(struct tca8418_keypad *keypad_data, - int reg, u8 *val) -{ - int error; - - error = i2c_smbus_read_byte_data(keypad_data->client, reg); - if (error < 0) { - dev_err(&keypad_data->client->dev, - "%s failed, reg: %d, error: %d\n", - __func__, reg, error); - return error; - } - - *val = (u8)error; - - return 0; -} - -static void tca8418_read_keypad(struct tca8418_keypad *keypad_data) -{ - int error, col, row; - u8 reg, state, code; - - /* Initial read of the key event FIFO */ - error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, ®); - - /* Assume that key code 0 signifies empty FIFO */ - while (error >= 0 && reg > 0) { - state = reg & KEY_EVENT_VALUE; - code = reg & KEY_EVENT_CODE; - - row = code / TCA8418_MAX_COLS; - col = code % TCA8418_MAX_COLS; - - row = (col) ? row : row - 1; - col = (col) ? col - 1 : TCA8418_MAX_COLS - 1; - - code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift); - input_event(keypad_data->input, EV_MSC, MSC_SCAN, code); - input_report_key(keypad_data->input, - keypad_data->keymap[code], state); - - /* Read for next loop */ - error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, ®); - } - - if (error < 0) - dev_err(&keypad_data->client->dev, - "unable to read REG_KEY_EVENT_A\n"); - - input_sync(keypad_data->input); -} - -/* - * Threaded IRQ handler and this can (and will) sleep. - */ -static irqreturn_t tca8418_irq_handler(int irq, void *dev_id) -{ - struct tca8418_keypad *keypad_data = dev_id; - u8 reg; - int error; - - error = tca8418_read_byte(keypad_data, REG_INT_STAT, ®); - if (error) { - dev_err(&keypad_data->client->dev, - "unable to read REG_INT_STAT\n"); - goto exit; - } - - if (reg & INT_STAT_OVR_FLOW_INT) - dev_warn(&keypad_data->client->dev, "overflow occurred\n"); - - if (reg & INT_STAT_K_INT) - tca8418_read_keypad(keypad_data); - -exit: - /* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */ - reg = 0xff; - error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg); - if (error) - dev_err(&keypad_data->client->dev, - "unable to clear REG_INT_STAT\n"); - - return IRQ_HANDLED; -} - -/* - * Configure the TCA8418 for keypad operation - */ -static int __devinit tca8418_configure(struct tca8418_keypad *keypad_data) -{ - int reg, error; - - /* Write config register, if this fails assume device not present */ - error = tca8418_write_byte(keypad_data, REG_CFG, - CFG_INT_CFG | CFG_OVR_FLOW_IEN | CFG_KE_IEN); - if (error < 0) - return -ENODEV; - - - /* Assemble a mask for row and column registers */ - reg = ~(~0 << keypad_data->rows); - reg += (~(~0 << keypad_data->cols)) << 8; - keypad_data->keypad_mask = reg; - - /* Set registers to keypad mode */ - error |= tca8418_write_byte(keypad_data, REG_KP_GPIO1, reg); - error |= tca8418_write_byte(keypad_data, REG_KP_GPIO2, reg >> 8); - error |= tca8418_write_byte(keypad_data, REG_KP_GPIO3, reg >> 16); - - /* Enable column debouncing */ - error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS1, reg); - error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS2, reg >> 8); - error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS3, reg >> 16); - - return error; -} - -static int __devinit tca8418_keypad_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - const struct tca8418_keypad_platform_data *pdata = - client->dev.platform_data; - struct tca8418_keypad *keypad_data; - struct input_dev *input; - int error, row_shift, max_keys; - - /* Copy the platform data */ - if (!pdata) { - dev_dbg(&client->dev, "no platform data\n"); - return -EINVAL; - } - - if (!pdata->keymap_data) { - dev_err(&client->dev, "no keymap data defined\n"); - return -EINVAL; - } - - if (!pdata->rows || pdata->rows > TCA8418_MAX_ROWS) { - dev_err(&client->dev, "invalid rows\n"); - return -EINVAL; - } - - if (!pdata->cols || pdata->cols > TCA8418_MAX_COLS) { - dev_err(&client->dev, "invalid columns\n"); - return -EINVAL; - } - - /* Check i2c driver capabilities */ - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) { - dev_err(&client->dev, "%s adapter not supported\n", - dev_driver_string(&client->adapter->dev)); - return -ENODEV; - } - - row_shift = get_count_order(pdata->cols); - max_keys = pdata->rows << row_shift; - - /* Allocate memory for keypad_data, keymap and input device */ - keypad_data = kzalloc(sizeof(*keypad_data) + - max_keys * sizeof(keypad_data->keymap[0]), GFP_KERNEL); - if (!keypad_data) - return -ENOMEM; - - keypad_data->rows = pdata->rows; - keypad_data->cols = pdata->cols; - keypad_data->client = client; - keypad_data->row_shift = row_shift; - - /* Initialize the chip or fail if chip isn't present */ - error = tca8418_configure(keypad_data); - if (error < 0) - goto fail1; - - /* Configure input device */ - input = input_allocate_device(); - if (!input) { - error = -ENOMEM; - goto fail1; - } - keypad_data->input = input; - - input->name = client->name; - input->dev.parent = &client->dev; - - input->id.bustype = BUS_I2C; - input->id.vendor = 0x0001; - input->id.product = 0x001; - input->id.version = 0x0001; - - input->keycode = keypad_data->keymap; - input->keycodesize = sizeof(keypad_data->keymap[0]); - input->keycodemax = max_keys; - - __set_bit(EV_KEY, input->evbit); - if (pdata->rep) - __set_bit(EV_REP, input->evbit); - - input_set_capability(input, EV_MSC, MSC_SCAN); - - input_set_drvdata(input, keypad_data); - - matrix_keypad_build_keymap(pdata->keymap_data, row_shift, - input->keycode, input->keybit); - - if (pdata->irq_is_gpio) - client->irq = gpio_to_irq(client->irq); - - error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler, - IRQF_TRIGGER_FALLING, - client->name, keypad_data); - if (error) { - dev_dbg(&client->dev, - "Unable to claim irq %d; error %d\n", - client->irq, error); - goto fail2; - } - - error = input_register_device(input); - if (error) { - dev_dbg(&client->dev, - "Unable to register input device, error: %d\n", error); - goto fail3; - } - - i2c_set_clientdata(client, keypad_data); - return 0; - -fail3: - free_irq(client->irq, keypad_data); -fail2: - input_free_device(input); -fail1: - kfree(keypad_data); - return error; -} - -static int __devexit tca8418_keypad_remove(struct i2c_client *client) -{ - struct tca8418_keypad *keypad_data = i2c_get_clientdata(client); - - free_irq(keypad_data->client->irq, keypad_data); - - input_unregister_device(keypad_data->input); - - kfree(keypad_data); - - return 0; -} - - -static struct i2c_driver tca8418_keypad_driver = { - .driver = { - .name = TCA8418_NAME, - .owner = THIS_MODULE, - }, - .probe = tca8418_keypad_probe, - .remove = __devexit_p(tca8418_keypad_remove), - .id_table = tca8418_id, -}; - -static int __init tca8418_keypad_init(void) -{ - return i2c_add_driver(&tca8418_keypad_driver); -} -subsys_initcall(tca8418_keypad_init); - -static void __exit tca8418_keypad_exit(void) -{ - i2c_del_driver(&tca8418_keypad_driver); -} -module_exit(tca8418_keypad_exit); - -MODULE_AUTHOR("Kyle Manna <kyle.manna@fuel7.com>"); -MODULE_DESCRIPTION("Keypad driver for TCA8418"); -MODULE_LICENSE("GPL"); |