diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/adp5588-keys.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/adp5588-keys.c | 660 |
1 files changed, 660 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/adp5588-keys.c b/ANDROID_3.4.5/drivers/input/keyboard/adp5588-keys.c new file mode 100644 index 00000000..39ebffac --- /dev/null +++ b/ANDROID_3.4.5/drivers/input/keyboard/adp5588-keys.c @@ -0,0 +1,660 @@ +/* + * File: drivers/input/keyboard/adp5588_keys.c + * Description: keypad driver for ADP5588 and ADP5587 + * I2C QWERTY Keypad and IO Expander + * Bugs: Enter bugs at http://blackfin.uclinux.org/ + * + * Copyright (C) 2008-2010 Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/workqueue.h> +#include <linux/errno.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/slab.h> + +#include <linux/i2c/adp5588.h> + +/* Key Event Register xy */ +#define KEY_EV_PRESSED (1 << 7) +#define KEY_EV_MASK (0x7F) + +#define KP_SEL(x) (0xFFFF >> (16 - x)) /* 2^x-1 */ + +#define KEYP_MAX_EVENT 10 + +/* + * Early pre 4.0 Silicon required to delay readout by at least 25ms, + * since the Event Counter Register updated 25ms after the interrupt + * asserted. + */ +#define WA_DELAYED_READOUT_REVID(rev) ((rev) < 4) + +struct adp5588_kpad { + struct i2c_client *client; + struct input_dev *input; + struct delayed_work work; + unsigned long delay; + unsigned short keycode[ADP5588_KEYMAPSIZE]; + const struct adp5588_gpi_map *gpimap; + unsigned short gpimapsize; +#ifdef CONFIG_GPIOLIB + unsigned char gpiomap[ADP5588_MAXGPIO]; + bool export_gpio; + struct gpio_chip gc; + struct mutex gpio_lock; /* Protect cached dir, dat_out */ + u8 dat_out[3]; + u8 dir[3]; +#endif +}; + +static int adp5588_read(struct i2c_client *client, u8 reg) +{ + int ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) + dev_err(&client->dev, "Read Error\n"); + + return ret; +} + +static int adp5588_write(struct i2c_client *client, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(client, reg, val); +} + +#ifdef CONFIG_GPIOLIB +static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off) +{ + struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc); + unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]); + unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]); + + return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit); +} + +static void adp5588_gpio_set_value(struct gpio_chip *chip, + unsigned off, int val) +{ + struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc); + unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]); + unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]); + + mutex_lock(&kpad->gpio_lock); + + if (val) + kpad->dat_out[bank] |= bit; + else + kpad->dat_out[bank] &= ~bit; + + adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank, + kpad->dat_out[bank]); + + mutex_unlock(&kpad->gpio_lock); +} + +static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off) +{ + struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc); + unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]); + unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]); + int ret; + + mutex_lock(&kpad->gpio_lock); + + kpad->dir[bank] &= ~bit; + ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]); + + mutex_unlock(&kpad->gpio_lock); + + return ret; +} + +static int adp5588_gpio_direction_output(struct gpio_chip *chip, + unsigned off, int val) +{ + struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc); + unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]); + unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]); + int ret; + + mutex_lock(&kpad->gpio_lock); + + kpad->dir[bank] |= bit; + + if (val) + kpad->dat_out[bank] |= bit; + else + kpad->dat_out[bank] &= ~bit; + + ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank, + kpad->dat_out[bank]); + ret |= adp5588_write(kpad->client, GPIO_DIR1 + bank, + kpad->dir[bank]); + + mutex_unlock(&kpad->gpio_lock); + + return ret; +} + +static int __devinit adp5588_build_gpiomap(struct adp5588_kpad *kpad, + const struct adp5588_kpad_platform_data *pdata) +{ + bool pin_used[ADP5588_MAXGPIO]; + int n_unused = 0; + int i; + + memset(pin_used, 0, sizeof(pin_used)); + + for (i = 0; i < pdata->rows; i++) + pin_used[i] = true; + + for (i = 0; i < pdata->cols; i++) + pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true; + + for (i = 0; i < kpad->gpimapsize; i++) + pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true; + + for (i = 0; i < ADP5588_MAXGPIO; i++) + if (!pin_used[i]) + kpad->gpiomap[n_unused++] = i; + + return n_unused; +} + +static int __devinit adp5588_gpio_add(struct adp5588_kpad *kpad) +{ + struct device *dev = &kpad->client->dev; + const struct adp5588_kpad_platform_data *pdata = dev->platform_data; + const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data; + int i, error; + + if (!gpio_data) + return 0; + + kpad->gc.ngpio = adp5588_build_gpiomap(kpad, pdata); + if (kpad->gc.ngpio == 0) { + dev_info(dev, "No unused gpios left to export\n"); + return 0; + } + + kpad->export_gpio = true; + + kpad->gc.direction_input = adp5588_gpio_direction_input; + kpad->gc.direction_output = adp5588_gpio_direction_output; + kpad->gc.get = adp5588_gpio_get_value; + kpad->gc.set = adp5588_gpio_set_value; + kpad->gc.can_sleep = 1; + + kpad->gc.base = gpio_data->gpio_start; + kpad->gc.label = kpad->client->name; + kpad->gc.owner = THIS_MODULE; + + mutex_init(&kpad->gpio_lock); + + error = gpiochip_add(&kpad->gc); + if (error) { + dev_err(dev, "gpiochip_add failed, err: %d\n", error); + return error; + } + + for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) { + kpad->dat_out[i] = adp5588_read(kpad->client, + GPIO_DAT_OUT1 + i); + kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i); + } + + if (gpio_data->setup) { + error = gpio_data->setup(kpad->client, + kpad->gc.base, kpad->gc.ngpio, + gpio_data->context); + if (error) + dev_warn(dev, "setup failed, %d\n", error); + } + + return 0; +} + +static void __devexit adp5588_gpio_remove(struct adp5588_kpad *kpad) +{ + struct device *dev = &kpad->client->dev; + const struct adp5588_kpad_platform_data *pdata = dev->platform_data; + const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data; + int error; + + if (!kpad->export_gpio) + return; + + if (gpio_data->teardown) { + error = gpio_data->teardown(kpad->client, + kpad->gc.base, kpad->gc.ngpio, + gpio_data->context); + if (error) + dev_warn(dev, "teardown failed %d\n", error); + } + + error = gpiochip_remove(&kpad->gc); + if (error) + dev_warn(dev, "gpiochip_remove failed %d\n", error); +} +#else +static inline int adp5588_gpio_add(struct adp5588_kpad *kpad) +{ + return 0; +} + +static inline void adp5588_gpio_remove(struct adp5588_kpad *kpad) +{ +} +#endif + +static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt) +{ + int i, j; + + for (i = 0; i < ev_cnt; i++) { + int key = adp5588_read(kpad->client, Key_EVENTA + i); + int key_val = key & KEY_EV_MASK; + + if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) { + for (j = 0; j < kpad->gpimapsize; j++) { + if (key_val == kpad->gpimap[j].pin) { + input_report_switch(kpad->input, + kpad->gpimap[j].sw_evt, + key & KEY_EV_PRESSED); + break; + } + } + } else { + input_report_key(kpad->input, + kpad->keycode[key_val - 1], + key & KEY_EV_PRESSED); + } + } +} + +static void adp5588_work(struct work_struct *work) +{ + struct adp5588_kpad *kpad = container_of(work, + struct adp5588_kpad, work.work); + struct i2c_client *client = kpad->client; + int status, ev_cnt; + + status = adp5588_read(client, INT_STAT); + + if (status & ADP5588_OVR_FLOW_INT) /* Unlikely and should never happen */ + dev_err(&client->dev, "Event Overflow Error\n"); + + if (status & ADP5588_KE_INT) { + ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & ADP5588_KEC; + if (ev_cnt) { + adp5588_report_events(kpad, ev_cnt); + input_sync(kpad->input); + } + } + adp5588_write(client, INT_STAT, status); /* Status is W1C */ +} + +static irqreturn_t adp5588_irq(int irq, void *handle) +{ + struct adp5588_kpad *kpad = handle; + + /* + * use keventd context to read the event fifo registers + * Schedule readout at least 25ms after notification for + * REVID < 4 + */ + + schedule_delayed_work(&kpad->work, kpad->delay); + + return IRQ_HANDLED; +} + +static int __devinit adp5588_setup(struct i2c_client *client) +{ + const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data; + const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data; + int i, ret; + unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0; + + ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows)); + ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF); + ret |= adp5588_write(client, KP_GPIO3, KP_SEL(pdata->cols) >> 8); + + if (pdata->en_keylock) { + ret |= adp5588_write(client, UNLOCK1, pdata->unlock_key1); + ret |= adp5588_write(client, UNLOCK2, pdata->unlock_key2); + ret |= adp5588_write(client, KEY_LCK_EC_STAT, ADP5588_K_LCK_EN); + } + + for (i = 0; i < KEYP_MAX_EVENT; i++) + ret |= adp5588_read(client, Key_EVENTA); + + for (i = 0; i < pdata->gpimapsize; i++) { + unsigned short pin = pdata->gpimap[i].pin; + + if (pin <= GPI_PIN_ROW_END) { + evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE)); + } else { + evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF); + evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8); + } + } + + if (pdata->gpimapsize) { + ret |= adp5588_write(client, GPI_EM1, evt_mode1); + ret |= adp5588_write(client, GPI_EM2, evt_mode2); + ret |= adp5588_write(client, GPI_EM3, evt_mode3); + } + + if (gpio_data) { + for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) { + int pull_mask = gpio_data->pullup_dis_mask; + + ret |= adp5588_write(client, GPIO_PULL1 + i, + (pull_mask >> (8 * i)) & 0xFF); + } + } + + ret |= adp5588_write(client, INT_STAT, + ADP5588_CMP2_INT | ADP5588_CMP1_INT | + ADP5588_OVR_FLOW_INT | ADP5588_K_LCK_INT | + ADP5588_GPI_INT | ADP5588_KE_INT); /* Status is W1C */ + + ret |= adp5588_write(client, CFG, ADP5588_INT_CFG | + ADP5588_OVR_FLOW_IEN | + ADP5588_KE_IEN); + + if (ret < 0) { + dev_err(&client->dev, "Write Error\n"); + return ret; + } + + return 0; +} + +static void __devinit adp5588_report_switch_state(struct adp5588_kpad *kpad) +{ + int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1); + int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2); + int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3); + int gpi_stat_tmp, pin_loc; + int i; + + for (i = 0; i < kpad->gpimapsize; i++) { + unsigned short pin = kpad->gpimap[i].pin; + + if (pin <= GPI_PIN_ROW_END) { + gpi_stat_tmp = gpi_stat1; + pin_loc = pin - GPI_PIN_ROW_BASE; + } else if ((pin - GPI_PIN_COL_BASE) < 8) { + gpi_stat_tmp = gpi_stat2; + pin_loc = pin - GPI_PIN_COL_BASE; + } else { + gpi_stat_tmp = gpi_stat3; + pin_loc = pin - GPI_PIN_COL_BASE - 8; + } + + if (gpi_stat_tmp < 0) { + dev_err(&kpad->client->dev, + "Can't read GPIO_DAT_STAT switch %d default to OFF\n", + pin); + gpi_stat_tmp = 0; + } + + input_report_switch(kpad->input, + kpad->gpimap[i].sw_evt, + !(gpi_stat_tmp & (1 << pin_loc))); + } + + input_sync(kpad->input); +} + + +static int __devinit adp5588_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct adp5588_kpad *kpad; + const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data; + struct input_dev *input; + unsigned int revid; + int ret, i; + int error; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); + return -EIO; + } + + if (!pdata) { + dev_err(&client->dev, "no platform data?\n"); + return -EINVAL; + } + + if (!pdata->rows || !pdata->cols || !pdata->keymap) { + dev_err(&client->dev, "no rows, cols or keymap from pdata\n"); + return -EINVAL; + } + + if (pdata->keymapsize != ADP5588_KEYMAPSIZE) { + dev_err(&client->dev, "invalid keymapsize\n"); + return -EINVAL; + } + + if (!pdata->gpimap && pdata->gpimapsize) { + dev_err(&client->dev, "invalid gpimap from pdata\n"); + return -EINVAL; + } + + if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) { + dev_err(&client->dev, "invalid gpimapsize\n"); + return -EINVAL; + } + + for (i = 0; i < pdata->gpimapsize; i++) { + unsigned short pin = pdata->gpimap[i].pin; + + if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) { + dev_err(&client->dev, "invalid gpi pin data\n"); + return -EINVAL; + } + + if (pin <= GPI_PIN_ROW_END) { + if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) { + dev_err(&client->dev, "invalid gpi row data\n"); + return -EINVAL; + } + } else { + if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) { + dev_err(&client->dev, "invalid gpi col data\n"); + return -EINVAL; + } + } + } + + if (!client->irq) { + dev_err(&client->dev, "no IRQ?\n"); + return -EINVAL; + } + + kpad = kzalloc(sizeof(*kpad), GFP_KERNEL); + input = input_allocate_device(); + if (!kpad || !input) { + error = -ENOMEM; + goto err_free_mem; + } + + kpad->client = client; + kpad->input = input; + INIT_DELAYED_WORK(&kpad->work, adp5588_work); + + ret = adp5588_read(client, DEV_ID); + if (ret < 0) { + error = ret; + goto err_free_mem; + } + + revid = (u8) ret & ADP5588_DEVICE_ID_MASK; + if (WA_DELAYED_READOUT_REVID(revid)) + kpad->delay = msecs_to_jiffies(30); + + input->name = client->name; + input->phys = "adp5588-keys/input0"; + input->dev.parent = &client->dev; + + input_set_drvdata(input, kpad); + + input->id.bustype = BUS_I2C; + input->id.vendor = 0x0001; + input->id.product = 0x0001; + input->id.version = revid; + + input->keycodesize = sizeof(kpad->keycode[0]); + input->keycodemax = pdata->keymapsize; + input->keycode = kpad->keycode; + + memcpy(kpad->keycode, pdata->keymap, + pdata->keymapsize * input->keycodesize); + + kpad->gpimap = pdata->gpimap; + kpad->gpimapsize = pdata->gpimapsize; + + /* setup input device */ + __set_bit(EV_KEY, input->evbit); + + if (pdata->repeat) + __set_bit(EV_REP, input->evbit); + + for (i = 0; i < input->keycodemax; i++) + __set_bit(kpad->keycode[i] & KEY_MAX, input->keybit); + __clear_bit(KEY_RESERVED, input->keybit); + + if (kpad->gpimapsize) + __set_bit(EV_SW, input->evbit); + for (i = 0; i < kpad->gpimapsize; i++) + __set_bit(kpad->gpimap[i].sw_evt, input->swbit); + + error = input_register_device(input); + if (error) { + dev_err(&client->dev, "unable to register input device\n"); + goto err_free_mem; + } + + error = request_irq(client->irq, adp5588_irq, + IRQF_TRIGGER_FALLING, + client->dev.driver->name, kpad); + if (error) { + dev_err(&client->dev, "irq %d busy?\n", client->irq); + goto err_unreg_dev; + } + + error = adp5588_setup(client); + if (error) + goto err_free_irq; + + if (kpad->gpimapsize) + adp5588_report_switch_state(kpad); + + error = adp5588_gpio_add(kpad); + if (error) + goto err_free_irq; + + device_init_wakeup(&client->dev, 1); + i2c_set_clientdata(client, kpad); + + dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq); + return 0; + + err_free_irq: + free_irq(client->irq, kpad); + err_unreg_dev: + input_unregister_device(input); + input = NULL; + err_free_mem: + input_free_device(input); + kfree(kpad); + + return error; +} + +static int __devexit adp5588_remove(struct i2c_client *client) +{ + struct adp5588_kpad *kpad = i2c_get_clientdata(client); + + adp5588_write(client, CFG, 0); + free_irq(client->irq, kpad); + cancel_delayed_work_sync(&kpad->work); + input_unregister_device(kpad->input); + adp5588_gpio_remove(kpad); + kfree(kpad); + + return 0; +} + +#ifdef CONFIG_PM +static int adp5588_suspend(struct device *dev) +{ + struct adp5588_kpad *kpad = dev_get_drvdata(dev); + struct i2c_client *client = kpad->client; + + disable_irq(client->irq); + cancel_delayed_work_sync(&kpad->work); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(client->irq); + + return 0; +} + +static int adp5588_resume(struct device *dev) +{ + struct adp5588_kpad *kpad = dev_get_drvdata(dev); + struct i2c_client *client = kpad->client; + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(client->irq); + + enable_irq(client->irq); + + return 0; +} + +static const struct dev_pm_ops adp5588_dev_pm_ops = { + .suspend = adp5588_suspend, + .resume = adp5588_resume, +}; +#endif + +static const struct i2c_device_id adp5588_id[] = { + { "adp5588-keys", 0 }, + { "adp5587-keys", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adp5588_id); + +static struct i2c_driver adp5588_driver = { + .driver = { + .name = KBUILD_MODNAME, +#ifdef CONFIG_PM + .pm = &adp5588_dev_pm_ops, +#endif + }, + .probe = adp5588_probe, + .remove = __devexit_p(adp5588_remove), + .id_table = adp5588_id, +}; + +module_i2c_driver(adp5588_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("ADP5588/87 Keypad driver"); |