diff options
Diffstat (limited to 'drivers/input/keyboard/nomadik-ske-keypad.c')
| -rw-r--r-- | drivers/input/keyboard/nomadik-ske-keypad.c | 268 |
1 files changed, 240 insertions, 28 deletions
diff --git a/drivers/input/keyboard/nomadik-ske-keypad.c b/drivers/input/keyboard/nomadik-ske-keypad.c index 6d0955dba5b..6f3ee376811 100644 --- a/drivers/input/keyboard/nomadik-ske-keypad.c +++ b/drivers/input/keyboard/nomadik-ske-keypad.c @@ -12,6 +12,7 @@ #include <linux/platform_device.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> #include <linux/spinlock.h> #include <linux/io.h> #include <linux/delay.h> @@ -21,6 +22,7 @@ #include <linux/regulator/consumer.h> #include <plat/ske.h> +#include <plat/gpio.h> /* SKE_CR bits */ #define SKE_KPMLT (0x1 << 6) @@ -60,6 +62,14 @@ * @clk: clock structure pointer * @enable: flag to enable the driver event * @regulator: pointer to the regulator used for ske kyepad + * @gpio_input_irq: array for gpio irqs + * @key_pressed: hold the key state + * @work: delayed work variable for gpio switch + * @ske_rows: rows gpio array for ske + * @ske_cols: columns gpio array for ske + * @gpio_row: gpio row + * @gpio_col: gpio column + * @gpio_work: delayed work variable for release gpio key */ struct ske_keypad { int irq; @@ -71,6 +81,14 @@ struct ske_keypad { spinlock_t ske_keypad_lock; bool enable; struct regulator *regulator; + int gpio_input_irq[SKE_KPD_MAX_ROWS]; + int key_pressed; + struct delayed_work work; + int ske_rows[SKE_KPD_MAX_ROWS]; + int ske_cols[SKE_KPD_MAX_COLS]; + int gpio_row; + int gpio_col; + struct delayed_work gpio_work; }; static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr, @@ -139,18 +157,41 @@ static int __devinit ske_keypad_chip_init(struct ske_keypad *keypad) return 0; } -static void ske_enable(struct ske_keypad *keypad) +static void ske_mode_enable(struct ske_keypad *keypad, bool enable) { - if (keypad->enable) { + int i; + + if (!enable) { + writel(0, keypad->reg_base + SKE_CR); + if (keypad->board->exit) + keypad->board->exit(); + for (i = 0; i < keypad->board->krow; i++) { + enable_irq(keypad->gpio_input_irq[i]); + enable_irq_wake(keypad->gpio_input_irq[i]); + } + clk_disable(keypad->clk); + regulator_disable(keypad->regulator); + } else { regulator_enable(keypad->regulator); clk_enable(keypad->clk); - enable_irq(keypad->irq); + for (i = 0; i < keypad->board->krow; i++) { + disable_irq_nosync(keypad->gpio_input_irq[i]); + disable_irq_wake(keypad->gpio_input_irq[i]); + } + if (keypad->board->init) + keypad->board->init(); ske_keypad_chip_init(keypad); + } +} +static void ske_enable(struct ske_keypad *keypad, bool enable) +{ + keypad->enable = enable; + if (keypad->enable) { + enable_irq(keypad->irq); + ske_mode_enable(keypad, true); } else { + ske_mode_enable(keypad, false); disable_irq(keypad->irq); - ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0); - clk_disable(keypad->clk); - regulator_disable(keypad->regulator); } } @@ -177,7 +218,7 @@ static ssize_t ske_store_attr_enable(struct device *dev, if (keypad->enable != val) { keypad->enable = val ? true : false; - ske_enable(keypad); + ske_enable(keypad, keypad->enable); } return count; } @@ -199,7 +240,6 @@ static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col) int row = 0, code, pos; struct input_dev *input = keypad->input; u32 ske_ris; - int key_pressed; int num_of_rows; /* find out the row */ @@ -211,10 +251,11 @@ static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col) code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT); ske_ris = readl(keypad->reg_base + SKE_RIS); - key_pressed = ske_ris & SKE_KPRISA; + keypad->key_pressed = ske_ris & SKE_KPRISA; input_event(input, EV_MSC, MSC_SCAN, code); - input_report_key(input, keypad->keymap[code], key_pressed); + input_report_key(input, keypad->keymap[code], + keypad->key_pressed); input_sync(input); num_of_rows--; } while (num_of_rows); @@ -251,10 +292,8 @@ static void ske_keypad_read_data(struct ske_keypad *keypad) } } } - -static irqreturn_t ske_keypad_irq(int irq, void *dev_id) +static void ske_keypad_scan(struct ske_keypad *keypad) { - struct ske_keypad *keypad = dev_id; int timeout = keypad->board->debounce_ms; /* disable auto scan interrupt; mask the interrupt generated */ @@ -273,6 +312,139 @@ static irqreturn_t ske_keypad_irq(int irq, void *dev_id) /* enable auto scan interrupts */ ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA); +} + +static void ske_gpio_switch_work(struct work_struct *work) +{ + struct ske_keypad *keypad = container_of(work, + struct ske_keypad, work.work); + + ske_mode_enable(keypad, false); + keypad->enable = false; +} + +static void ske_gpio_release_work(struct work_struct *work) +{ + int code; + struct ske_keypad *keypad = container_of(work, + struct ske_keypad, gpio_work.work); + struct input_dev *input = keypad->input; + + code = MATRIX_SCAN_CODE(keypad->gpio_row, keypad->gpio_col, + SKE_KEYPAD_ROW_SHIFT); + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, keypad->keymap[code], 1); + input_sync(input); + input_report_key(input, keypad->keymap[code], 0); + input_sync(input); +} + +static int ske_read_get_gpio_row(struct ske_keypad *keypad) +{ + int row; + int value = 0; + int ret; + + /* read all rows GPIO data register values */ + for (row = 0; row < SKE_KPD_MAX_ROWS ; row++) { + ret = gpio_get_value(keypad->ske_rows[row]); + value += (1 << row) * ret; + } + + /* get the exact row */ + for (row = 0; row < keypad->board->krow; row++) { + if (((1 << row) & value) == 0) + return row; + } + + return -1; +} + +static void ske_set_cols(struct ske_keypad *keypad, int col) +{ + int i ; + int value; + + /* + * Set all columns except the requested column + * output pin as high + */ + for (i = 0; i < SKE_KPD_MAX_COLS; i++) { + if (i == col) + value = 0; + else + value = 1; + gpio_request(keypad->ske_cols[i], "ske-kp"); + gpio_direction_output(keypad->ske_cols[i], value); + gpio_free(keypad->ske_cols[i]); + } +} + +static void ske_free_cols(struct ske_keypad *keypad) +{ + int i ; + + for (i = 0; i < SKE_KPD_MAX_COLS; i++) { + gpio_request(keypad->ske_cols[i], "ske-kp"); + gpio_direction_output(keypad->ske_cols[i], 0); + gpio_free(keypad->ske_cols[i]); + } +} + +static void ske_manual_scan(struct ske_keypad *keypad) +{ + int row; + int col; + + for (col = 0; col < keypad->board->kcol; col++) { + ske_set_cols(keypad, col); + row = ske_read_get_gpio_row(keypad); + if (row >= 0) { + keypad->key_pressed = 1; + keypad->gpio_row = row; + keypad->gpio_col = col; + break; + } + } + ske_free_cols(keypad); +} + +static irqreturn_t ske_keypad_gpio_irq(int irq, void *dev_id) +{ + struct ske_keypad *keypad = dev_id; + + if (!gpio_get_value(NOMADIK_IRQ_TO_GPIO(irq))) { + ske_manual_scan(keypad); + if (!keypad->enable) { + keypad->enable = true; + ske_mode_enable(keypad, true); + } + /* + * Schedule the work queue to change it to + * report the key pressed, if it is not detected in SKE mode. + */ + if (keypad->key_pressed) + schedule_delayed_work(&keypad->gpio_work, + KEY_PRESSED_DELAY); + } + + return IRQ_HANDLED; +} +static irqreturn_t ske_keypad_irq(int irq, void *dev_id) +{ + struct ske_keypad *keypad = dev_id; + + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); + ske_keypad_scan(keypad); + + /* + * Schedule the work queue to change it to + * GPIO mode, if there is no activity in SKE mode + */ + if (!keypad->key_pressed && keypad->enable) + schedule_delayed_work(&keypad->work, + keypad->board->switch_delay); return IRQ_HANDLED; } @@ -286,6 +458,7 @@ static int __devinit ske_keypad_probe(struct platform_device *pdev) void __iomem *reg_base; int ret = 0; int irq; + int i; struct ske_keypad_platform_data *plat = pdev->dev.platform_data; if (!plat) { @@ -338,7 +511,6 @@ static int __devinit ske_keypad_probe(struct platform_device *pdev) ret = -ENOMEM; goto out_freekeypad; } - keypad->regulator = regulator_get(&pdev->dev, "v-ape"); if (IS_ERR(keypad->regulator)) { dev_err(&pdev->dev, "regulator_get failed\n"); @@ -382,29 +554,57 @@ static int __devinit ske_keypad_probe(struct platform_device *pdev) keypad->input = input; keypad->reg_base = reg_base; keypad->clk = clk; - keypad->enable = true; + INIT_DELAYED_WORK(&keypad->work, ske_gpio_switch_work); + INIT_DELAYED_WORK(&keypad->gpio_work, ske_gpio_release_work); /* allocations are sane, we begin HW initialization */ clk_enable(keypad->clk); if (!keypad->board->init) { - dev_err(&pdev->dev, "NULL board initialization helper\n"); + dev_err(&pdev->dev, "init funtion not defined\n"); ret = -EINVAL; goto out_unregisterinput; } if (keypad->board->init() < 0) { - dev_err(&pdev->dev, "unable to set keypad board config\n"); + dev_err(&pdev->dev, "keyboard init config failed\n"); ret = -EINVAL; goto out_unregisterinput; } - ret = ske_keypad_chip_init(keypad); - if (ret < 0) { - dev_err(&pdev->dev, "unable to init keypad hardware\n"); + if (!keypad->board->exit) { + dev_err(&pdev->dev, "exit funtion not defined\n"); + ret = -EINVAL; goto out_unregisterinput; } + if (keypad->board->exit() < 0) { + dev_err(&pdev->dev, "keyboard exit config failed\n"); + ret = -EINVAL; + goto out_unregisterinput; + } + for (i = 0; i < SKE_KPD_MAX_ROWS; i++) { + keypad->ske_rows[i] = *plat->gpio_input_pins; + keypad->ske_cols[i] = *plat->gpio_output_pins; + keypad->gpio_input_irq[i] = + NOMADIK_GPIO_TO_IRQ(keypad->ske_rows[i]); + plat->gpio_input_pins++; + plat->gpio_output_pins++; + } + + for (i = 0; i < keypad->board->krow; i++) { + ret = request_threaded_irq(keypad->gpio_input_irq[i], + NULL, ske_keypad_gpio_irq, + IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND, + "ske-keypad-gpio", keypad); + if (ret) { + dev_err(&pdev->dev, "allocate gpio irq %d failed\n", + keypad->gpio_input_irq[i]); + goto out_unregisterinput; + } + enable_irq_wake(keypad->gpio_input_irq[i]); + } + ret = request_threaded_irq(keypad->irq, NULL, ske_keypad_irq, IRQF_ONESHOT, "ske-keypad", keypad); if (ret) { @@ -424,6 +624,9 @@ static int __devinit ske_keypad_probe(struct platform_device *pdev) platform_set_drvdata(pdev, keypad); + clk_disable(keypad->clk); + regulator_disable(keypad->regulator); + return 0; out_free_irq: @@ -454,6 +657,8 @@ static int __devexit ske_keypad_remove(struct platform_device *pdev) struct ske_keypad *keypad = platform_get_drvdata(pdev); struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); free_irq(keypad->irq, keypad); input_unregister_device(keypad->input); @@ -465,7 +670,6 @@ static int __devexit ske_keypad_remove(struct platform_device *pdev) if (keypad->board->exit) keypad->board->exit(); - regulator_disable(keypad->regulator); regulator_put(keypad->regulator); iounmap(keypad->reg_base); @@ -484,9 +688,14 @@ static int ske_keypad_suspend(struct device *dev) if (device_may_wakeup(dev)) enable_irq_wake(irq); - else if (keypad->enable) { - keypad->enable = false; - ske_enable(keypad); + else { + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); + disable_irq(irq); + if (keypad->enable) { + ske_mode_enable(keypad, false); + keypad->enable = false; + } } return 0; @@ -500,9 +709,12 @@ static int ske_keypad_resume(struct device *dev) if (device_may_wakeup(dev)) disable_irq_wake(irq); - else if (!keypad->enable) { - keypad->enable = true; - ske_enable(keypad); + else { + if (!keypad->enable) { + keypad->enable = true; + ske_mode_enable(keypad, true); + } + enable_irq(irq); } return 0; @@ -539,6 +751,6 @@ static void __exit ske_keypad_exit(void) module_exit(ske_keypad_exit); MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Naveen Kumar <naveen.gaddipati@stericsson.com> / Sundar Iyer <sundar.iyer@stericsson.com>"); +MODULE_AUTHOR("Naveen Kumar <naveen.gaddipati@stericsson.com>"); MODULE_DESCRIPTION("Nomadik Scroll-Key-Encoder Keypad Driver"); MODULE_ALIAS("platform:nomadik-ske-keypad"); |