diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/max7359_keypad.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/max7359_keypad.c | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/max7359_keypad.c b/ANDROID_3.4.5/drivers/input/keyboard/max7359_keypad.c deleted file mode 100644 index 8edada8a..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/max7359_keypad.c +++ /dev/null @@ -1,323 +0,0 @@ -/* - * max7359_keypad.c - MAX7359 Key Switch Controller Driver - * - * Copyright (C) 2009 Samsung Electronics - * Kim Kyuwon <q1.kim@samsung.com> - * - * Based on pxa27x_keypad.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. - * - * Datasheet: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5456 - */ - -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/pm.h> -#include <linux/input.h> -#include <linux/input/matrix_keypad.h> - -#define MAX7359_MAX_KEY_ROWS 8 -#define MAX7359_MAX_KEY_COLS 8 -#define MAX7359_MAX_KEY_NUM (MAX7359_MAX_KEY_ROWS * MAX7359_MAX_KEY_COLS) -#define MAX7359_ROW_SHIFT 3 - -/* - * MAX7359 registers - */ -#define MAX7359_REG_KEYFIFO 0x00 -#define MAX7359_REG_CONFIG 0x01 -#define MAX7359_REG_DEBOUNCE 0x02 -#define MAX7359_REG_INTERRUPT 0x03 -#define MAX7359_REG_PORTS 0x04 -#define MAX7359_REG_KEYREP 0x05 -#define MAX7359_REG_SLEEP 0x06 - -/* - * Configuration register bits - */ -#define MAX7359_CFG_SLEEP (1 << 7) -#define MAX7359_CFG_INTERRUPT (1 << 5) -#define MAX7359_CFG_KEY_RELEASE (1 << 3) -#define MAX7359_CFG_WAKEUP (1 << 1) -#define MAX7359_CFG_TIMEOUT (1 << 0) - -/* - * Autosleep register values (ms) - */ -#define MAX7359_AUTOSLEEP_8192 0x01 -#define MAX7359_AUTOSLEEP_4096 0x02 -#define MAX7359_AUTOSLEEP_2048 0x03 -#define MAX7359_AUTOSLEEP_1024 0x04 -#define MAX7359_AUTOSLEEP_512 0x05 -#define MAX7359_AUTOSLEEP_256 0x06 - -struct max7359_keypad { - /* matrix key code map */ - unsigned short keycodes[MAX7359_MAX_KEY_NUM]; - - struct input_dev *input_dev; - struct i2c_client *client; -}; - -static int max7359_write_reg(struct i2c_client *client, u8 reg, u8 val) -{ - int ret = i2c_smbus_write_byte_data(client, reg, val); - - if (ret < 0) - dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", - __func__, reg, val, ret); - return ret; -} - -static int max7359_read_reg(struct i2c_client *client, int reg) -{ - int ret = i2c_smbus_read_byte_data(client, reg); - - if (ret < 0) - dev_err(&client->dev, "%s: reg 0x%x, err %d\n", - __func__, reg, ret); - return ret; -} - -static void max7359_build_keycode(struct max7359_keypad *keypad, - const struct matrix_keymap_data *keymap_data) -{ - struct input_dev *input_dev = keypad->input_dev; - int i; - - for (i = 0; i < keymap_data->keymap_size; i++) { - unsigned int key = keymap_data->keymap[i]; - unsigned int row = KEY_ROW(key); - unsigned int col = KEY_COL(key); - unsigned int scancode = MATRIX_SCAN_CODE(row, col, - MAX7359_ROW_SHIFT); - unsigned short keycode = KEY_VAL(key); - - keypad->keycodes[scancode] = keycode; - __set_bit(keycode, input_dev->keybit); - } - __clear_bit(KEY_RESERVED, input_dev->keybit); -} - -/* runs in an IRQ thread -- can (and will!) sleep */ -static irqreturn_t max7359_interrupt(int irq, void *dev_id) -{ - struct max7359_keypad *keypad = dev_id; - struct input_dev *input_dev = keypad->input_dev; - int val, row, col, release, code; - - val = max7359_read_reg(keypad->client, MAX7359_REG_KEYFIFO); - row = val & 0x7; - col = (val >> 3) & 0x7; - release = val & 0x40; - - code = MATRIX_SCAN_CODE(row, col, MAX7359_ROW_SHIFT); - - dev_dbg(&keypad->client->dev, - "key[%d:%d] %s\n", row, col, release ? "release" : "press"); - - input_event(input_dev, EV_MSC, MSC_SCAN, code); - input_report_key(input_dev, keypad->keycodes[code], !release); - input_sync(input_dev); - - return IRQ_HANDLED; -} - -/* - * Let MAX7359 fall into a deep sleep: - * If no keys are pressed, enter sleep mode for 8192 ms. And if any - * key is pressed, the MAX7359 returns to normal operating mode. - */ -static inline void max7359_fall_deepsleep(struct i2c_client *client) -{ - max7359_write_reg(client, MAX7359_REG_SLEEP, MAX7359_AUTOSLEEP_8192); -} - -/* - * Let MAX7359 take a catnap: - * Autosleep just for 256 ms. - */ -static inline void max7359_take_catnap(struct i2c_client *client) -{ - max7359_write_reg(client, MAX7359_REG_SLEEP, MAX7359_AUTOSLEEP_256); -} - -static int max7359_open(struct input_dev *dev) -{ - struct max7359_keypad *keypad = input_get_drvdata(dev); - - max7359_take_catnap(keypad->client); - - return 0; -} - -static void max7359_close(struct input_dev *dev) -{ - struct max7359_keypad *keypad = input_get_drvdata(dev); - - max7359_fall_deepsleep(keypad->client); -} - -static void max7359_initialize(struct i2c_client *client) -{ - max7359_write_reg(client, MAX7359_REG_CONFIG, - MAX7359_CFG_INTERRUPT | /* Irq clears after host read */ - MAX7359_CFG_KEY_RELEASE | /* Key release enable */ - MAX7359_CFG_WAKEUP); /* Key press wakeup enable */ - - /* Full key-scan functionality */ - max7359_write_reg(client, MAX7359_REG_DEBOUNCE, 0x1F); - - /* nINT asserts every debounce cycles */ - max7359_write_reg(client, MAX7359_REG_INTERRUPT, 0x01); - - max7359_fall_deepsleep(client); -} - -static int __devinit max7359_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - const struct matrix_keymap_data *keymap_data = client->dev.platform_data; - struct max7359_keypad *keypad; - struct input_dev *input_dev; - int ret; - int error; - - if (!client->irq) { - dev_err(&client->dev, "The irq number should not be zero\n"); - return -EINVAL; - } - - /* Detect MAX7359: The initial Keys FIFO value is '0x3F' */ - ret = max7359_read_reg(client, MAX7359_REG_KEYFIFO); - if (ret < 0) { - dev_err(&client->dev, "failed to detect device\n"); - return -ENODEV; - } - - dev_dbg(&client->dev, "keys FIFO is 0x%02x\n", ret); - - keypad = kzalloc(sizeof(struct max7359_keypad), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!keypad || !input_dev) { - dev_err(&client->dev, "failed to allocate memory\n"); - error = -ENOMEM; - goto failed_free_mem; - } - - keypad->client = client; - keypad->input_dev = input_dev; - - input_dev->name = client->name; - input_dev->id.bustype = BUS_I2C; - input_dev->open = max7359_open; - input_dev->close = max7359_close; - input_dev->dev.parent = &client->dev; - - input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); - input_dev->keycodesize = sizeof(keypad->keycodes[0]); - input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); - input_dev->keycode = keypad->keycodes; - - input_set_capability(input_dev, EV_MSC, MSC_SCAN); - input_set_drvdata(input_dev, keypad); - - max7359_build_keycode(keypad, keymap_data); - - error = request_threaded_irq(client->irq, NULL, max7359_interrupt, - IRQF_TRIGGER_LOW | IRQF_ONESHOT, - client->name, keypad); - if (error) { - dev_err(&client->dev, "failed to register interrupt\n"); - goto failed_free_mem; - } - - /* Register the input device */ - error = input_register_device(input_dev); - if (error) { - dev_err(&client->dev, "failed to register input device\n"); - goto failed_free_irq; - } - - /* Initialize MAX7359 */ - max7359_initialize(client); - - i2c_set_clientdata(client, keypad); - device_init_wakeup(&client->dev, 1); - - return 0; - -failed_free_irq: - free_irq(client->irq, keypad); -failed_free_mem: - input_free_device(input_dev); - kfree(keypad); - return error; -} - -static int __devexit max7359_remove(struct i2c_client *client) -{ - struct max7359_keypad *keypad = i2c_get_clientdata(client); - - free_irq(client->irq, keypad); - input_unregister_device(keypad->input_dev); - kfree(keypad); - - return 0; -} - -#ifdef CONFIG_PM -static int max7359_suspend(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - - max7359_fall_deepsleep(client); - - if (device_may_wakeup(&client->dev)) - enable_irq_wake(client->irq); - - return 0; -} - -static int max7359_resume(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - - if (device_may_wakeup(&client->dev)) - disable_irq_wake(client->irq); - - /* Restore the default setting */ - max7359_take_catnap(client); - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(max7359_pm, max7359_suspend, max7359_resume); - -static const struct i2c_device_id max7359_ids[] = { - { "max7359", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, max7359_ids); - -static struct i2c_driver max7359_i2c_driver = { - .driver = { - .name = "max7359", - .pm = &max7359_pm, - }, - .probe = max7359_probe, - .remove = __devexit_p(max7359_remove), - .id_table = max7359_ids, -}; - -module_i2c_driver(max7359_i2c_driver); - -MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>"); -MODULE_DESCRIPTION("MAX7359 Key Switch Controller Driver"); -MODULE_LICENSE("GPL v2"); |