diff options
Diffstat (limited to 'drivers/input/keyboard/nomadik-ske-keypad.c')
| -rw-r--r-- | drivers/input/keyboard/nomadik-ske-keypad.c | 770 |
1 files changed, 664 insertions, 106 deletions
diff --git a/drivers/input/keyboard/nomadik-ske-keypad.c b/drivers/input/keyboard/nomadik-ske-keypad.c index 101e245944e..6a0707f7f76 100644 --- a/drivers/input/keyboard/nomadik-ske-keypad.c +++ b/drivers/input/keyboard/nomadik-ske-keypad.c @@ -2,7 +2,7 @@ * Copyright (C) ST-Ericsson SA 2010 * * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson - * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson + * co-Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson * * License terms:GNU General Public License (GPL) version 2 * @@ -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> @@ -19,8 +20,10 @@ #include <linux/slab.h> #include <linux/clk.h> #include <linux/module.h> +#include <linux/regulator/consumer.h> #include <plat/ske.h> +#include <linux/gpio/nomadik.h> /* SKE_CR bits */ #define SKE_KPMLT (0x1 << 6) @@ -48,17 +51,38 @@ #define SKE_ASR3 0x2C #define SKE_NUM_ASRX_REGISTERS (4) +#define KEY_PRESSED_DELAY 10 + + +#define KEY_REPORTED 1 +#define KEY_PRESSED 2 /** * struct ske_keypad - data structure used by keypad driver - * @irq: irq no - * @reg_base: ske regsiters base address - * @input: pointer to input device object - * @board: keypad platform device - * @keymap: matrix scan code table for keycodes - * @clk: clock structure pointer + * @dev: Pointer to the structure device + * @irq: irq no + * @reg_base: ske regsiters base address + * @input: pointer to input device object + * @board: keypad platform device + * @keymap: matrix scan code table for keycodes + * @clk: clock structure pointer + * @ske_keypad_lock: lock used while writting into registers + * @enable: flag to enable the driver event + * @enable_on_resume: set if keypad should be enabled on resume + * @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 + * @keys: matrix holding key status + * @scan_work: delayed work for scaning new key actions */ struct ske_keypad { + struct device *dev; int irq; void __iomem *reg_base; struct input_dev *input; @@ -66,6 +90,19 @@ struct ske_keypad { unsigned short keymap[SKE_KPD_KEYMAP_SIZE]; struct clk *clk; spinlock_t ske_keypad_lock; + bool enable; + bool enable_on_resume; + struct regulator *regulator; + int *gpio_input_irq; + int key_pressed; + struct delayed_work work; + int *ske_rows; + int *ske_cols; + int gpio_row; + int gpio_col; + struct delayed_work gpio_work; + u8 **keys; + struct delayed_work scan_work; }; static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr, @@ -83,15 +120,15 @@ static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr, spin_unlock(&keypad->ske_keypad_lock); } -/* +/** * ske_keypad_chip_init: init keypad controller configuration - * + * @keypad: pointer to device structure * Enable Multi key press detection, auto scan mode */ static int __init ske_keypad_chip_init(struct ske_keypad *keypad) { u32 value; - int timeout = 50; + int timeout = keypad->board->debounce_ms; /* check SKE_RIS to be 0 */ while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--) @@ -100,7 +137,7 @@ static int __init ske_keypad_chip_init(struct ske_keypad *keypad) if (!timeout) return -EINVAL; - /* + /** * set debounce value * keypad dbounce is configured in DBCR[15:8] * dbounce value in steps of 32/32.768 ms @@ -115,7 +152,7 @@ static int __init ske_keypad_chip_init(struct ske_keypad *keypad) /* enable multi key detection */ ske_keypad_set_bits(keypad, SKE_CR, 0x0, SKE_KPMLT); - /* + /** * set up the number of columns * KPCN[5:3] defines no. of keypad columns to be auto scanned */ @@ -134,14 +171,125 @@ static int __init ske_keypad_chip_init(struct ske_keypad *keypad) return 0; } +static void ske_mode_enable(struct ske_keypad *keypad, bool enable) +{ + int i; + + if (!enable) { + dev_dbg(keypad->dev, "%s disable keypad\n", __func__); + writel(0, keypad->reg_base + SKE_CR); + if (keypad->board->exit) + keypad->board->exit(); + for (i = 0; i < keypad->board->kconnected_rows; 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 { + dev_dbg(keypad->dev, "%s enable keypad\n", __func__); + regulator_enable(keypad->regulator); + clk_enable(keypad->clk); + for (i = 0; i < keypad->board->kconnected_rows; 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); + } +} + +static ssize_t ske_show_attr_enable(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ske_keypad *keypad = platform_get_drvdata(pdev); + return sprintf(buf, "%d\n", keypad->enable); +} + +static ssize_t ske_store_attr_enable(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ske_keypad *keypad = platform_get_drvdata(pdev); + unsigned long val; + + if (strict_strtoul(buf, 0, &val)) + return -EINVAL; + + if ((val != 0) && (val != 1)) + return -EINVAL; + + if (keypad->enable != val) { + keypad->enable = val ? true : false; + ske_enable(keypad, keypad->enable); + } + return count; +} + +static DEVICE_ATTR(enable, S_IWUSR | S_IRUGO, + ske_show_attr_enable, ske_store_attr_enable); + +static struct attribute *ske_keypad_attrs[] = { + &dev_attr_enable.attr, + NULL, +}; + +static struct attribute_group ske_attr_group = { + .attrs = ske_keypad_attrs, +}; + +static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col) +{ + int row = 0, code, pos; + u32 ske_ris; + int num_of_rows; + + /* find out the row */ + num_of_rows = hweight8(status); + do { + pos = __ffs(status); + row = pos; + status &= ~(1 << pos); + + if (row >= keypad->board->krow) + /* no more rows supported by this keypad */ + break; + + code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT); + ske_ris = readl(keypad->reg_base + SKE_RIS); + keypad->key_pressed = ske_ris & SKE_KPRISA; + + dev_dbg(keypad->dev, + "%s key_pressed:%d code:%d row:%d col:%d\n", + __func__, keypad->key_pressed, code, row, col); + + if (keypad->key_pressed) + keypad->keys[row][col] |= KEY_PRESSED; + + num_of_rows--; + } while (num_of_rows); +} + static void ske_keypad_read_data(struct ske_keypad *keypad) { - struct input_dev *input = keypad->input; - u16 status; - int col = 0, row = 0, code; - int ske_asr, ske_ris, key_pressed, i; + u8 status; + int col = 0; + int ske_asr, i; - /* + /** * Read the auto scan registers * * Each SKE_ASRx (x=0 to x=3) contains two row values. @@ -153,59 +301,274 @@ static void ske_keypad_read_data(struct ske_keypad *keypad) if (!ske_asr) continue; - /* now that ASRx is zero, find out the column x and row y*/ - if (ske_asr & 0xff) { + /* now that ASRx is zero, find out the coloumn x and row y */ + status = ske_asr & 0xff; + if (status) { col = i * 2; - status = ske_asr & 0xff; - } else { + if (col >= keypad->board->kcol) + /* no more columns supported by this keypad */ + break; + ske_keypad_report(keypad, status, col); + } + status = (ske_asr & 0xff00) >> 8; + if (status) { col = (i * 2) + 1; - status = (ske_asr & 0xff00) >> 8; + if (col >= keypad->board->kcol) + /* no more columns supported by this keypad */ + break; + ske_keypad_report(keypad, status, col); } + } +} - /* find out the row */ - row = __ffs(status); +static void ske_keypad_scan_work(struct work_struct *work) +{ + int timeout = 10; + int i, j, code; + struct ske_keypad *keypad = container_of(work, + struct ske_keypad, scan_work.work); + struct input_dev *input = keypad->input; - code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT); - ske_ris = readl(keypad->reg_base + SKE_RIS); - key_pressed = ske_ris & SKE_KPRISA; + /* Wait for autoscan to complete */ + while (readl(keypad->reg_base + SKE_CR) & SKE_KPASON) + cpu_relax(); - input_event(input, EV_MSC, MSC_SCAN, code); - input_report_key(input, keypad->keymap[code], key_pressed); - input_sync(input); + /* SKEx registers are stable and can be read */ + ske_keypad_read_data(keypad); + + /* Check for key actions */ + for (i = 0; i < keypad->board->krow; i++) { + for (j = 0; j < keypad->board->kcol; j++) { + switch (keypad->keys[i][j]) { + case KEY_REPORTED: + /** + * Key was reported but is no longer pressed, + * report it as released. + */ + code = MATRIX_SCAN_CODE(i, j, + SKE_KEYPAD_ROW_SHIFT); + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, keypad->keymap[code], + 0); + input_sync(input); + keypad->keys[i][j] = 0; + dev_dbg(keypad->dev, + "%s Key release reported, code:%d " + "(key %d)\n", + __func__, code, keypad->keymap[code]); + break; + case KEY_PRESSED: + /* Key pressed but not yet reported, report */ + code = MATRIX_SCAN_CODE(i, j, + SKE_KEYPAD_ROW_SHIFT); + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, keypad->keymap[code], + 1); + input_sync(input); + dev_dbg(keypad->dev, + "%s Key press reported, code:%d " + "(key %d)\n", + __func__, code, keypad->keymap[code]); + /* Intentional fall though */ + case (KEY_REPORTED | KEY_PRESSED): + /** + * Key pressed and reported, just reset + * KEY_PRESSED for next scan + */ + keypad->keys[i][j] = KEY_REPORTED; + break; + } + } + } + + if (keypad->key_pressed) { + /* + * Key still pressed, schedule work to poll changes in 100 ms + * After increasing the delay from 50 to 100 it is taking + * 2% to 3% load on average. + */ + schedule_delayed_work(&keypad->scan_work, + msecs_to_jiffies(100)); + } else { + /* For safty measure, clear interrupt once more */ + ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA); + + /* Wait for raw interrupt to clear */ + while ((readl(keypad->reg_base + SKE_RIS) & SKE_KPRISA) && + --timeout) { + udelay(10); + } + + if (!timeout) + dev_err(keypad->dev, + "%s Timeed out waiting on irq to clear\n", + __func__); + + /* enable auto scan interrupts */ + ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA); + + /** + * 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); } } +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); + + dev_dbg(keypad->dev, "%s Key press reported, code:%d (key %d)\n", + __func__, code, keypad->keymap[code]); + + 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 < keypad->board->kconnected_rows ; row++) { + ret = gpio_get_value(keypad->ske_rows[row]); + value += (1 << row) * ret; + } + + /* get the exact row */ + for (row = 0; row < keypad->board->kconnected_rows; 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 < keypad->board->kconnected_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 < keypad->board->kconnected_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->kconnected_cols; 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 back to GPIO + * mode if there is no activity in SKE mode + */ + schedule_delayed_work(&keypad->work, + keypad->board->switch_delay); + } + /** + * Schedule delayed work to report key press 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; - int retries = 20; + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); /* disable auto scan interrupt; mask the interrupt generated */ - ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0); + ske_keypad_set_bits(keypad, SKE_IMSC, SKE_KPIMA, 0x0); ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA); - while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --retries) - msleep(5); - - if (retries) { - /* SKEx registers are stable and can be read */ - ske_keypad_read_data(keypad); - } - - /* enable auto scan interrupts */ - ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA); + schedule_delayed_work(&keypad->scan_work, 0); return IRQ_HANDLED; } static int __init ske_keypad_probe(struct platform_device *pdev) { - const struct ske_keypad_platform_data *plat = pdev->dev.platform_data; struct ske_keypad *keypad; + struct resource *res = NULL; struct input_dev *input; - struct resource *res; + struct clk *clk; + void __iomem *reg_base; + int ret = 0; int irq; - int error; + int i; + struct ske_keypad_platform_data *plat = pdev->dev.platform_data; if (!plat) { dev_err(&pdev->dev, "invalid keypad platform data\n"); @@ -219,42 +582,56 @@ static int __init ske_keypad_probe(struct platform_device *pdev) } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { + if (res == NULL) { dev_err(&pdev->dev, "missing platform resources\n"); - return -EINVAL; + return -ENXIO; } - keypad = kzalloc(sizeof(struct ske_keypad), GFP_KERNEL); - input = input_allocate_device(); - if (!keypad || !input) { - dev_err(&pdev->dev, "failed to allocate keypad memory\n"); - error = -ENOMEM; - goto err_free_mem; + res = request_mem_region(res->start, resource_size(res), pdev->name); + if (!res) { + dev_err(&pdev->dev, "failed to request I/O memory\n"); + return -EBUSY; } - keypad->irq = irq; - keypad->board = plat; - keypad->input = input; - spin_lock_init(&keypad->ske_keypad_lock); + reg_base = ioremap(res->start, resource_size(res)); + if (!reg_base) { + dev_err(&pdev->dev, "failed to remap I/O memory\n"); + ret = -ENXIO; + goto out_freerequest_memregions; + } - if (!request_mem_region(res->start, resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "failed to request I/O memory\n"); - error = -EBUSY; - goto err_free_mem; + clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "failed to clk_get\n"); + ret = PTR_ERR(clk); + goto out_freeioremap; } - keypad->reg_base = ioremap(res->start, resource_size(res)); - if (!keypad->reg_base) { - dev_err(&pdev->dev, "failed to remap I/O memory\n"); - error = -ENXIO; - goto err_free_mem_region; + /* resources are sane; we begin allocation */ + keypad = kzalloc(sizeof(struct ske_keypad), GFP_KERNEL); + if (!keypad) { + dev_err(&pdev->dev, "failed to allocate keypad memory\n"); + goto out_freeclk; } + keypad->dev = &pdev->dev; - keypad->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(keypad->clk)) { - dev_err(&pdev->dev, "failed to get clk\n"); - error = PTR_ERR(keypad->clk); - goto err_iounmap; + input = input_allocate_device(); + if (!input) { + dev_err(&pdev->dev, "failed to input_allocate_device\n"); + 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"); + keypad->regulator = NULL; + goto out_regulator_get; + } else { + ret = regulator_enable(keypad->regulator); + if (ret < 0) { + dev_err(&pdev->dev, "regulator_enable failed\n"); + goto out_regulator_enable; + } } input->id.bustype = BUS_HOST; @@ -266,38 +643,153 @@ static int __init ske_keypad_probe(struct platform_device *pdev) input->keycodemax = ARRAY_SIZE(keypad->keymap); input_set_capability(input, EV_MSC, MSC_SCAN); + input_set_drvdata(input, keypad); __set_bit(EV_KEY, input->evbit); if (!plat->no_autorepeat) __set_bit(EV_REP, input->evbit); matrix_keypad_build_keymap(plat->keymap_data, SKE_KEYPAD_ROW_SHIFT, - input->keycode, input->keybit); + input->keycode, input->keybit); + + ret = input_register_device(input); + if (ret) { + dev_err(&pdev->dev, + "unable to register input device: %d\n", ret); + goto out_freeinput; + } + + keypad->irq = irq; + keypad->board = plat; + keypad->input = input; + keypad->reg_base = reg_base; + keypad->clk = clk; + INIT_DELAYED_WORK(&keypad->work, ske_gpio_switch_work); + INIT_DELAYED_WORK(&keypad->gpio_work, ske_gpio_release_work); + INIT_DELAYED_WORK(&keypad->scan_work, ske_keypad_scan_work); + /* allocations are sane, we begin HW initialization */ clk_enable(keypad->clk); - /* go through board initialization helpers */ - if (keypad->board->init) - keypad->board->init(); + if (!keypad->board->init) { + dev_err(&pdev->dev, "init funtion not defined\n"); + ret = -EINVAL; + goto out_unregisterinput; + } - error = ske_keypad_chip_init(keypad); - if (error) { - dev_err(&pdev->dev, "unable to init keypad hardware\n"); - goto err_clk_disable; + if (keypad->board->init() < 0) { + dev_err(&pdev->dev, "keyboard init config failed\n"); + ret = -EINVAL; + goto out_unregisterinput; } - error = request_threaded_irq(keypad->irq, NULL, ske_keypad_irq, - IRQF_ONESHOT, "ske-keypad", keypad); - if (error) { - dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq); - goto err_clk_disable; + 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; + } + + if (plat->kconnected_rows == 0) { + /* + * Board config data does not specify the number of connected + * rows and columns; assume that it matches the specified max + * values. + */ + plat->kconnected_rows = plat->krow; + plat->kconnected_cols = plat->kcol; + } + + /* this code doesn't currently support non-square keypad */ + if (plat->kconnected_rows != plat->kconnected_cols) { + dev_err(&pdev->dev, + "invalid keypad configuration (not square)\n"), + ret = -EINVAL; + goto out_unregisterinput; } - error = input_register_device(input); - if (error) { + if (plat->kconnected_rows > SKE_KPD_MAX_ROWS || + plat->kconnected_cols > SKE_KPD_MAX_COLS) { dev_err(&pdev->dev, - "unable to register input device: %d\n", error); - goto err_free_irq; + "invalid keypad configuration (too many rows/cols)\n"), + ret = -EINVAL; + goto out_unregisterinput; + } + + keypad->gpio_input_irq = kmalloc(sizeof(*keypad->gpio_input_irq) * + plat->kconnected_rows, + GFP_KERNEL); + if (!keypad->gpio_input_irq) { + dev_err(&pdev->dev, "failed to allocate input_irq memory\n"); + goto out_unregisterinput; + } + + keypad->ske_rows = kmalloc(sizeof(*keypad->ske_rows) * + plat->kconnected_rows, GFP_KERNEL); + if (!keypad->ske_rows) { + dev_err(&pdev->dev, "failed to allocate ske_rows memory\n"); + goto out_freemem_input_irq; + } + + keypad->ske_cols = kmalloc(sizeof(*keypad->ske_cols) * + plat->kconnected_cols, GFP_KERNEL); + if (!keypad->ske_cols) { + dev_err(&pdev->dev, "failed to allocate ske_cols memory\n"); + goto out_freemem_rows; + } + + keypad->keys = kzalloc(sizeof(*keypad->keys) * plat->krow, GFP_KERNEL); + if (!keypad->keys) { + dev_err(&pdev->dev, "failed to allocate keys:rows memory\n"); + goto out_freemem_cols; + } + for (i = 0; i < plat->krow; i++) { + keypad->keys[i] = kzalloc(sizeof(*keypad->keys[i]) * + plat->kcol, GFP_KERNEL); + if (!keypad->keys[i]) { + dev_err(&pdev->dev, + "failed to allocate keys:cols memory\n"); + goto out_freemem_keys; + } + } + + for (i = 0; i < plat->kconnected_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]); + } + + for (i = 0; i < keypad->board->kconnected_rows; 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_freemem_keys; + } + 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) { + dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq); + goto out_freemem_keys; + } + + /* sysfs implementation for dynamic enable/disable the input event */ + ret = sysfs_create_group(&pdev->dev.kobj, &ske_attr_group); + if (ret) { + dev_err(&pdev->dev, "failed to create sysfs entries\n"); + goto out_free_irq; } if (plat->wakeup_enable) @@ -305,37 +797,80 @@ static int __init ske_keypad_probe(struct platform_device *pdev) platform_set_drvdata(pdev, keypad); + clk_disable(keypad->clk); + regulator_disable(keypad->regulator); + return 0; -err_free_irq: +out_free_irq: free_irq(keypad->irq, keypad); -err_clk_disable: +out_freemem_keys: + for (i = 0; i < plat->krow; i++) + kfree(keypad->keys[i]); + kfree(keypad->keys); +out_freemem_cols: + kfree(keypad->ske_cols); +out_freemem_rows: + kfree(keypad->ske_rows); +out_freemem_input_irq: + kfree(keypad->gpio_input_irq); +out_unregisterinput: + input_unregister_device(input); + input = NULL; clk_disable(keypad->clk); - clk_put(keypad->clk); -err_iounmap: - iounmap(keypad->reg_base); -err_free_mem_region: - release_mem_region(res->start, resource_size(res)); -err_free_mem: +out_freeinput: + regulator_disable(keypad->regulator); +out_regulator_enable: + regulator_put(keypad->regulator); +out_regulator_get: input_free_device(input); +out_freekeypad: kfree(keypad); - return error; +out_freeclk: + clk_put(clk); +out_freeioremap: + iounmap(reg_base); +out_freerequest_memregions: + release_mem_region(res->start, resource_size(res)); + return ret; } 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); + int i; - free_irq(keypad->irq, keypad); + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); + cancel_delayed_work_sync(&keypad->scan_work); - input_unregister_device(keypad->input); + for (i = 0; i < keypad->board->krow; i++) + kfree(keypad->keys[i]); + kfree(keypad->keys); + kfree(keypad->ske_cols); + kfree(keypad->ske_rows); - clk_disable(keypad->clk); + input_unregister_device(keypad->input); + sysfs_remove_group(&pdev->dev.kobj, &ske_attr_group); + if (keypad->enable) + clk_disable(keypad->clk); clk_put(keypad->clk); - if (keypad->board->exit) + if (keypad->enable && keypad->board->exit) keypad->board->exit(); + else { + for (i = 0; i < keypad->board->krow; i++) { + disable_irq_nosync(keypad->gpio_input_irq[i]); + disable_irq_wake(keypad->gpio_input_irq[i]); + } + } + for (i = 0; i < keypad->board->krow; i++) + free_irq(keypad->gpio_input_irq[i], keypad); + + kfree(keypad->gpio_input_irq); + free_irq(keypad->irq, keypad); + regulator_put(keypad->regulator); iounmap(keypad->reg_base); release_mem_region(res->start, resource_size(res)); @@ -353,8 +888,19 @@ static int ske_keypad_suspend(struct device *dev) if (device_may_wakeup(dev)) enable_irq_wake(irq); - else - ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0); + else { + cancel_delayed_work_sync(&keypad->gpio_work); + cancel_delayed_work_sync(&keypad->work); + cancel_delayed_work_sync(&keypad->scan_work); + disable_irq(irq); + + keypad->enable_on_resume = keypad->enable; + + if (keypad->enable) { + ske_mode_enable(keypad, false); + keypad->enable = false; + } + } return 0; } @@ -367,8 +913,20 @@ static int ske_keypad_resume(struct device *dev) if (device_may_wakeup(dev)) disable_irq_wake(irq); - else - ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA); + else { + if (keypad->enable_on_resume && !keypad->enable) { + keypad->enable = true; + ske_mode_enable(keypad, true); + /* + * Schedule the work queue to change it to GPIO mode + * if there is no activity in SKE mode + */ + if (!keypad->key_pressed) + schedule_delayed_work(&keypad->work, + keypad->board->switch_delay); + } + enable_irq(irq); + } return 0; } @@ -399,6 +957,6 @@ 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"); |