diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/samsung-keypad.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/samsung-keypad.c | 697 |
1 files changed, 0 insertions, 697 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/samsung-keypad.c b/ANDROID_3.4.5/drivers/input/keyboard/samsung-keypad.c deleted file mode 100644 index 2391ae88..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/samsung-keypad.c +++ /dev/null @@ -1,697 +0,0 @@ -/* - * Samsung keypad driver - * - * Copyright (C) 2010 Samsung Electronics Co.Ltd - * Author: Joonyoung Shim <jy0922.shim@samsung.com> - * Author: Donghwa Lee <dh09.lee@samsung.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ - -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/input.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/pm.h> -#include <linux/pm_runtime.h> -#include <linux/slab.h> -#include <linux/of.h> -#include <linux/of_gpio.h> -#include <linux/sched.h> -#include <linux/input/samsung-keypad.h> - -#define SAMSUNG_KEYIFCON 0x00 -#define SAMSUNG_KEYIFSTSCLR 0x04 -#define SAMSUNG_KEYIFCOL 0x08 -#define SAMSUNG_KEYIFROW 0x0c -#define SAMSUNG_KEYIFFC 0x10 - -/* SAMSUNG_KEYIFCON */ -#define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0) -#define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1) -#define SAMSUNG_KEYIFCON_DF_EN (1 << 2) -#define SAMSUNG_KEYIFCON_FC_EN (1 << 3) -#define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4) - -/* SAMSUNG_KEYIFSTSCLR */ -#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0) -#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8) -#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8 -#define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0) -#define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16) -#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16 - -/* SAMSUNG_KEYIFCOL */ -#define SAMSUNG_KEYIFCOL_MASK (0xff << 0) -#define S5PV210_KEYIFCOLEN_MASK (0xff << 8) - -/* SAMSUNG_KEYIFROW */ -#define SAMSUNG_KEYIFROW_MASK (0xff << 0) -#define S5PV210_KEYIFROW_MASK (0x3fff << 0) - -/* SAMSUNG_KEYIFFC */ -#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0) - -enum samsung_keypad_type { - KEYPAD_TYPE_SAMSUNG, - KEYPAD_TYPE_S5PV210, -}; - -struct samsung_keypad { - struct input_dev *input_dev; - struct platform_device *pdev; - struct clk *clk; - void __iomem *base; - wait_queue_head_t wait; - bool stopped; - bool wake_enabled; - int irq; - enum samsung_keypad_type type; - unsigned int row_shift; - unsigned int rows; - unsigned int cols; - unsigned int row_state[SAMSUNG_MAX_COLS]; -#ifdef CONFIG_OF - int row_gpios[SAMSUNG_MAX_ROWS]; - int col_gpios[SAMSUNG_MAX_COLS]; -#endif - unsigned short keycodes[]; -}; - -static void samsung_keypad_scan(struct samsung_keypad *keypad, - unsigned int *row_state) -{ - unsigned int col; - unsigned int val; - - for (col = 0; col < keypad->cols; col++) { - if (keypad->type == KEYPAD_TYPE_S5PV210) { - val = S5PV210_KEYIFCOLEN_MASK; - val &= ~(1 << col) << 8; - } else { - val = SAMSUNG_KEYIFCOL_MASK; - val &= ~(1 << col); - } - - writel(val, keypad->base + SAMSUNG_KEYIFCOL); - mdelay(1); - - val = readl(keypad->base + SAMSUNG_KEYIFROW); - row_state[col] = ~val & ((1 << keypad->rows) - 1); - } - - /* KEYIFCOL reg clear */ - writel(0, keypad->base + SAMSUNG_KEYIFCOL); -} - -static bool samsung_keypad_report(struct samsung_keypad *keypad, - unsigned int *row_state) -{ - struct input_dev *input_dev = keypad->input_dev; - unsigned int changed; - unsigned int pressed; - unsigned int key_down = 0; - unsigned int val; - unsigned int col, row; - - for (col = 0; col < keypad->cols; col++) { - changed = row_state[col] ^ keypad->row_state[col]; - key_down |= row_state[col]; - if (!changed) - continue; - - for (row = 0; row < keypad->rows; row++) { - if (!(changed & (1 << row))) - continue; - - pressed = row_state[col] & (1 << row); - - dev_dbg(&keypad->input_dev->dev, - "key %s, row: %d, col: %d\n", - pressed ? "pressed" : "released", row, col); - - val = MATRIX_SCAN_CODE(row, col, keypad->row_shift); - - input_event(input_dev, EV_MSC, MSC_SCAN, val); - input_report_key(input_dev, - keypad->keycodes[val], pressed); - } - input_sync(keypad->input_dev); - } - - memcpy(keypad->row_state, row_state, sizeof(keypad->row_state)); - - return key_down; -} - -static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) -{ - struct samsung_keypad *keypad = dev_id; - unsigned int row_state[SAMSUNG_MAX_COLS]; - unsigned int val; - bool key_down; - - pm_runtime_get_sync(&keypad->pdev->dev); - - do { - val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR); - /* Clear interrupt. */ - writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); - - samsung_keypad_scan(keypad, row_state); - - key_down = samsung_keypad_report(keypad, row_state); - if (key_down) - wait_event_timeout(keypad->wait, keypad->stopped, - msecs_to_jiffies(50)); - - } while (key_down && !keypad->stopped); - - pm_runtime_put(&keypad->pdev->dev); - - return IRQ_HANDLED; -} - -static void samsung_keypad_start(struct samsung_keypad *keypad) -{ - unsigned int val; - - pm_runtime_get_sync(&keypad->pdev->dev); - - /* Tell IRQ thread that it may poll the device. */ - keypad->stopped = false; - - clk_enable(keypad->clk); - - /* Enable interrupt bits. */ - val = readl(keypad->base + SAMSUNG_KEYIFCON); - val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN; - writel(val, keypad->base + SAMSUNG_KEYIFCON); - - /* KEYIFCOL reg clear. */ - writel(0, keypad->base + SAMSUNG_KEYIFCOL); - - pm_runtime_put(&keypad->pdev->dev); -} - -static void samsung_keypad_stop(struct samsung_keypad *keypad) -{ - unsigned int val; - - pm_runtime_get_sync(&keypad->pdev->dev); - - /* Signal IRQ thread to stop polling and disable the handler. */ - keypad->stopped = true; - wake_up(&keypad->wait); - disable_irq(keypad->irq); - - /* Clear interrupt. */ - writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); - - /* Disable interrupt bits. */ - val = readl(keypad->base + SAMSUNG_KEYIFCON); - val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN); - writel(val, keypad->base + SAMSUNG_KEYIFCON); - - clk_disable(keypad->clk); - - /* - * Now that chip should not generate interrupts we can safely - * re-enable the handler. - */ - enable_irq(keypad->irq); - - pm_runtime_put(&keypad->pdev->dev); -} - -static int samsung_keypad_open(struct input_dev *input_dev) -{ - struct samsung_keypad *keypad = input_get_drvdata(input_dev); - - samsung_keypad_start(keypad); - - return 0; -} - -static void samsung_keypad_close(struct input_dev *input_dev) -{ - struct samsung_keypad *keypad = input_get_drvdata(input_dev); - - samsung_keypad_stop(keypad); -} - -#ifdef CONFIG_OF -static struct samsung_keypad_platdata *samsung_keypad_parse_dt( - struct device *dev) -{ - struct samsung_keypad_platdata *pdata; - struct matrix_keymap_data *keymap_data; - uint32_t *keymap, num_rows = 0, num_cols = 0; - struct device_node *np = dev->of_node, *key_np; - unsigned int key_count = 0; - - pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) { - dev_err(dev, "could not allocate memory for platform data\n"); - return NULL; - } - - of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); - of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); - if (!num_rows || !num_cols) { - dev_err(dev, "number of keypad rows/columns not specified\n"); - return NULL; - } - pdata->rows = num_rows; - pdata->cols = num_cols; - - keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); - if (!keymap_data) { - dev_err(dev, "could not allocate memory for keymap data\n"); - return NULL; - } - pdata->keymap_data = keymap_data; - - for_each_child_of_node(np, key_np) - key_count++; - - keymap_data->keymap_size = key_count; - keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); - if (!keymap) { - dev_err(dev, "could not allocate memory for keymap\n"); - return NULL; - } - keymap_data->keymap = keymap; - - for_each_child_of_node(np, key_np) { - u32 row, col, key_code; - of_property_read_u32(key_np, "keypad,row", &row); - of_property_read_u32(key_np, "keypad,column", &col); - of_property_read_u32(key_np, "linux,code", &key_code); - *keymap++ = KEY(row, col, key_code); - } - - if (of_get_property(np, "linux,input-no-autorepeat", NULL)) - pdata->no_autorepeat = true; - if (of_get_property(np, "linux,input-wakeup", NULL)) - pdata->wakeup = true; - - return pdata; -} - -static void samsung_keypad_parse_dt_gpio(struct device *dev, - struct samsung_keypad *keypad) -{ - struct device_node *np = dev->of_node; - int gpio, ret, row, col; - - for (row = 0; row < keypad->rows; row++) { - gpio = of_get_named_gpio(np, "row-gpios", row); - keypad->row_gpios[row] = gpio; - if (!gpio_is_valid(gpio)) { - dev_err(dev, "keypad row[%d]: invalid gpio %d\n", - row, gpio); - continue; - } - - ret = gpio_request(gpio, "keypad-row"); - if (ret) - dev_err(dev, "keypad row[%d] gpio request failed\n", - row); - } - - for (col = 0; col < keypad->cols; col++) { - gpio = of_get_named_gpio(np, "col-gpios", col); - keypad->col_gpios[col] = gpio; - if (!gpio_is_valid(gpio)) { - dev_err(dev, "keypad column[%d]: invalid gpio %d\n", - col, gpio); - continue; - } - - ret = gpio_request(gpio, "keypad-col"); - if (ret) - dev_err(dev, "keypad column[%d] gpio request failed\n", - col); - } -} - -static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) -{ - int cnt; - - for (cnt = 0; cnt < keypad->rows; cnt++) - if (gpio_is_valid(keypad->row_gpios[cnt])) - gpio_free(keypad->row_gpios[cnt]); - - for (cnt = 0; cnt < keypad->cols; cnt++) - if (gpio_is_valid(keypad->col_gpios[cnt])) - gpio_free(keypad->col_gpios[cnt]); -} -#else -static -struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) -{ - return NULL; -} - -static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) -{ -} -#endif - -static int __devinit samsung_keypad_probe(struct platform_device *pdev) -{ - const struct samsung_keypad_platdata *pdata; - const struct matrix_keymap_data *keymap_data; - struct samsung_keypad *keypad; - struct resource *res; - struct input_dev *input_dev; - unsigned int row_shift; - unsigned int keymap_size; - int error; - - if (pdev->dev.of_node) - pdata = samsung_keypad_parse_dt(&pdev->dev); - else - pdata = pdev->dev.platform_data; - if (!pdata) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -EINVAL; - } - - keymap_data = pdata->keymap_data; - if (!keymap_data) { - dev_err(&pdev->dev, "no keymap data defined\n"); - return -EINVAL; - } - - if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS) - return -EINVAL; - - if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS) - return -EINVAL; - - /* initialize the gpio */ - if (pdata->cfg_gpio) - pdata->cfg_gpio(pdata->rows, pdata->cols); - - row_shift = get_count_order(pdata->cols); - keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]); - - keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL); - input_dev = input_allocate_device(); - if (!keypad || !input_dev) { - error = -ENOMEM; - goto err_free_mem; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - error = -ENODEV; - goto err_free_mem; - } - - keypad->base = ioremap(res->start, resource_size(res)); - if (!keypad->base) { - error = -EBUSY; - goto err_free_mem; - } - - keypad->clk = clk_get(&pdev->dev, "keypad"); - if (IS_ERR(keypad->clk)) { - dev_err(&pdev->dev, "failed to get keypad clk\n"); - error = PTR_ERR(keypad->clk); - goto err_unmap_base; - } - - keypad->input_dev = input_dev; - keypad->pdev = pdev; - keypad->row_shift = row_shift; - keypad->rows = pdata->rows; - keypad->cols = pdata->cols; - keypad->stopped = true; - init_waitqueue_head(&keypad->wait); - - if (pdev->dev.of_node) { -#ifdef CONFIG_OF - samsung_keypad_parse_dt_gpio(&pdev->dev, keypad); - keypad->type = of_device_is_compatible(pdev->dev.of_node, - "samsung,s5pv210-keypad"); -#endif - } else { - keypad->type = platform_get_device_id(pdev)->driver_data; - } - - input_dev->name = pdev->name; - input_dev->id.bustype = BUS_HOST; - input_dev->dev.parent = &pdev->dev; - input_set_drvdata(input_dev, keypad); - - input_dev->open = samsung_keypad_open; - input_dev->close = samsung_keypad_close; - - input_dev->evbit[0] = BIT_MASK(EV_KEY); - if (!pdata->no_autorepeat) - input_dev->evbit[0] |= BIT_MASK(EV_REP); - - input_set_capability(input_dev, EV_MSC, MSC_SCAN); - - input_dev->keycode = keypad->keycodes; - input_dev->keycodesize = sizeof(keypad->keycodes[0]); - input_dev->keycodemax = pdata->rows << row_shift; - - matrix_keypad_build_keymap(keymap_data, row_shift, - input_dev->keycode, input_dev->keybit); - - keypad->irq = platform_get_irq(pdev, 0); - if (keypad->irq < 0) { - error = keypad->irq; - goto err_put_clk; - } - - error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq, - IRQF_ONESHOT, dev_name(&pdev->dev), keypad); - if (error) { - dev_err(&pdev->dev, "failed to register keypad interrupt\n"); - goto err_put_clk; - } - - device_init_wakeup(&pdev->dev, pdata->wakeup); - platform_set_drvdata(pdev, keypad); - pm_runtime_enable(&pdev->dev); - - error = input_register_device(keypad->input_dev); - if (error) - goto err_free_irq; - - if (pdev->dev.of_node) { - devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); - devm_kfree(&pdev->dev, (void *)pdata->keymap_data); - devm_kfree(&pdev->dev, (void *)pdata); - } - return 0; - -err_free_irq: - free_irq(keypad->irq, keypad); - pm_runtime_disable(&pdev->dev); - device_init_wakeup(&pdev->dev, 0); - platform_set_drvdata(pdev, NULL); -err_put_clk: - clk_put(keypad->clk); - samsung_keypad_dt_gpio_free(keypad); -err_unmap_base: - iounmap(keypad->base); -err_free_mem: - input_free_device(input_dev); - kfree(keypad); - - return error; -} - -static int __devexit samsung_keypad_remove(struct platform_device *pdev) -{ - struct samsung_keypad *keypad = platform_get_drvdata(pdev); - - pm_runtime_disable(&pdev->dev); - device_init_wakeup(&pdev->dev, 0); - platform_set_drvdata(pdev, NULL); - - input_unregister_device(keypad->input_dev); - - /* - * It is safe to free IRQ after unregistering device because - * samsung_keypad_close will shut off interrupts. - */ - free_irq(keypad->irq, keypad); - - clk_put(keypad->clk); - samsung_keypad_dt_gpio_free(keypad); - - iounmap(keypad->base); - kfree(keypad); - - return 0; -} - -#ifdef CONFIG_PM_RUNTIME -static int samsung_keypad_runtime_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct samsung_keypad *keypad = platform_get_drvdata(pdev); - unsigned int val; - int error; - - if (keypad->stopped) - return 0; - - /* This may fail on some SoCs due to lack of controller support */ - error = enable_irq_wake(keypad->irq); - if (!error) - keypad->wake_enabled = true; - - val = readl(keypad->base + SAMSUNG_KEYIFCON); - val |= SAMSUNG_KEYIFCON_WAKEUPEN; - writel(val, keypad->base + SAMSUNG_KEYIFCON); - - clk_disable(keypad->clk); - - return 0; -} - -static int samsung_keypad_runtime_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct samsung_keypad *keypad = platform_get_drvdata(pdev); - unsigned int val; - - if (keypad->stopped) - return 0; - - clk_enable(keypad->clk); - - val = readl(keypad->base + SAMSUNG_KEYIFCON); - val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; - writel(val, keypad->base + SAMSUNG_KEYIFCON); - - if (keypad->wake_enabled) - disable_irq_wake(keypad->irq); - - return 0; -} -#endif - -#ifdef CONFIG_PM_SLEEP -static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, - bool enable) -{ - unsigned int val; - - clk_enable(keypad->clk); - - val = readl(keypad->base + SAMSUNG_KEYIFCON); - if (enable) { - val |= SAMSUNG_KEYIFCON_WAKEUPEN; - if (device_may_wakeup(&keypad->pdev->dev)) - enable_irq_wake(keypad->irq); - } else { - val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; - if (device_may_wakeup(&keypad->pdev->dev)) - disable_irq_wake(keypad->irq); - } - writel(val, keypad->base + SAMSUNG_KEYIFCON); - - clk_disable(keypad->clk); -} - -static int samsung_keypad_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct samsung_keypad *keypad = platform_get_drvdata(pdev); - struct input_dev *input_dev = keypad->input_dev; - - mutex_lock(&input_dev->mutex); - - if (input_dev->users) - samsung_keypad_stop(keypad); - - samsung_keypad_toggle_wakeup(keypad, true); - - mutex_unlock(&input_dev->mutex); - - return 0; -} - -static int samsung_keypad_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct samsung_keypad *keypad = platform_get_drvdata(pdev); - struct input_dev *input_dev = keypad->input_dev; - - mutex_lock(&input_dev->mutex); - - samsung_keypad_toggle_wakeup(keypad, false); - - if (input_dev->users) - samsung_keypad_start(keypad); - - mutex_unlock(&input_dev->mutex); - - return 0; -} -#endif - -static const struct dev_pm_ops samsung_keypad_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume) - SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend, - samsung_keypad_runtime_resume, NULL) -}; - -#ifdef CONFIG_OF -static const struct of_device_id samsung_keypad_dt_match[] = { - { .compatible = "samsung,s3c6410-keypad" }, - { .compatible = "samsung,s5pv210-keypad" }, - {}, -}; -MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match); -#else -#define samsung_keypad_dt_match NULL -#endif - -static struct platform_device_id samsung_keypad_driver_ids[] = { - { - .name = "samsung-keypad", - .driver_data = KEYPAD_TYPE_SAMSUNG, - }, { - .name = "s5pv210-keypad", - .driver_data = KEYPAD_TYPE_S5PV210, - }, - { }, -}; -MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids); - -static struct platform_driver samsung_keypad_driver = { - .probe = samsung_keypad_probe, - .remove = __devexit_p(samsung_keypad_remove), - .driver = { - .name = "samsung-keypad", - .owner = THIS_MODULE, - .of_match_table = samsung_keypad_dt_match, - .pm = &samsung_keypad_pm_ops, - }, - .id_table = samsung_keypad_driver_ids, -}; -module_platform_driver(samsung_keypad_driver); - -MODULE_DESCRIPTION("Samsung keypad driver"); -MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); -MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); -MODULE_LICENSE("GPL"); |