On Sun, May 30, 2010 at 12:06:24PM +0900, Joonyoung Shim wrote:
> This patch adds support for keypad driver running on Samsung cpus. This
> driver is tested on GONI and Aquila board using S5PC110 cpu.
>
> Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> drivers/input/keyboard/Kconfig | 9 +
> drivers/input/keyboard/Makefile | 1 +
> drivers/input/keyboard/samsung-keypad.c | 364 +++++++++++++++++++++++++++++++
> 3 files changed, 374 insertions(+), 0 deletions(-)
> create mode 100644 drivers/input/keyboard/samsung-keypad.c
>
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index d8fa5d7..bf6a50f 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -342,6 +342,15 @@ config KEYBOARD_PXA930_ROTARY
> To compile this driver as a module, choose M here: the
> module will be called pxa930_rotary.
>
> +config KEYBOARD_SAMSUNG
> + tristate "Samsung keypad support"
> + depends on SAMSUNG_DEV_KEYPAD
> + help
> + Say Y here if you want to use the Samsung keypad.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called samsung-keypad.
> +
> config KEYBOARD_STOWAWAY
> tristate "Stowaway keyboard"
> select SERIO
> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
> index 4596d0c..8f973ed 100644
> --- a/drivers/input/keyboard/Makefile
> +++ b/drivers/input/keyboard/Makefile
> @@ -32,6 +32,7 @@ obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
> obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
> obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
> obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
> +obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
> obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
> obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
> obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
> diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
> new file mode 100644
> index 0000000..f4bcf97
> --- /dev/null
> +++ b/drivers/input/keyboard/samsung-keypad.c
> @@ -0,0 +1,364 @@
> +/*
> + * samsung-keypad.c -- Samsung keypad driver
> + *
> + * Copyright (C) 2010 Samsung Electronics Co.Ltd
> + * Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> + * Author: Donghwa Lee <dh09.lee@xxxxxxxxxxx>
> + *
> + * 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/slab.h>
> +#include <plat/cpu.h>
you should _not_ be including <plat/cpu.h> here. and it looks form
the rest of the file that there's nothing from it being used.
> +#include <plat/keypad.h>
> +#include <plat/regs-keypad.h>
> +
> +struct samsung_kp {
> + struct input_dev *input_dev;
> + struct timer_list timer;
> + struct clk *clk;
> + struct work_struct work;
> + void __iomem *base;
> + unsigned short *keycodes;
> + unsigned int row_shift;
> + unsigned int rows;
> + unsigned int cols;
> + unsigned int row_state[SAMSUNG_MAX_COLS];
> + int irq;
> +};
> +
> +static void samsung_kp_scan(struct samsung_kp *keypad, unsigned int *row_state)
> +{
> + unsigned int col;
> + unsigned int val;
> +
> + for (col = 0; col < keypad->cols; col++) {
> +#if CONFIG_ARCH_S5PV210
> + val = S5PV210_KEYIFCOLEN_MASK;
> + val &= ~(1 << col) << 8;
> +#else
> + val = SAMSUNG_KEYIFCOL_MASK;
> + val &= ~(1 << col);
> +#endif
no platform specific #ifdefs
> + 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 void samsung_kp_worker(struct work_struct *work)
> +{
> + struct samsung_kp *keypad = container_of(work, struct samsung_kp, work);
> + unsigned int row_state[SAMSUNG_MAX_COLS];
> + unsigned int val;
> + unsigned int changed;
> + unsigned int pressed;
> + unsigned int key_down = 0;
> + int col, row;
> +
> + clk_enable(keypad->clk);
> +
> + val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
> +
> + /* interrupt clear */
> + writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
> +
> + val = readl(keypad->base + SAMSUNG_KEYIFCON);
> + val &= ~(SAMSUNG_INT_F_EN | SAMSUNG_INT_R_EN);
> + writel(val, keypad->base + SAMSUNG_KEYIFCON);
> +
> + samsung_kp_scan(keypad, row_state);
> +
> + 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_report_key(keypad->input_dev,
> + keypad->keycodes[val], pressed);
> + input_sync(keypad->input_dev);
> + }
> + }
> + memcpy(keypad->row_state, row_state, sizeof(row_state));
> +
> + if (key_down)
> + mod_timer(&keypad->timer, jiffies + HZ / 20);
> + else {
> + /* enable interrupt bit */
> + val = readl(keypad->base + SAMSUNG_KEYIFCON);
> + val |= (SAMSUNG_INT_F_EN | SAMSUNG_INT_R_EN);
> + writel(val, keypad->base + SAMSUNG_KEYIFCON);
> + enable_irq(keypad->irq);
> + }
> + clk_disable(keypad->clk);
> +}
> +
> +static irqreturn_t samsung_kp_interrupt(int irq, void *dev_id)
> +{
> + struct samsung_kp *keypad = dev_id;
> +
> + if (!work_pending(&keypad->work)) {
> + disable_irq_nosync(keypad->irq);
> + schedule_work(&keypad->work);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void samsung_kp_timer(unsigned long data)
> +{
> + struct samsung_kp *keypad = (struct samsung_kp *)data;
> +
> + schedule_work(&keypad->work);
> +}
> +
> +static int __devinit samsung_kp_probe(struct platform_device *pdev)
> +{
> + const struct samsung_kp_platdata *pdata;
> + const struct matrix_keymap_data *keymap_data;
> + struct samsung_kp *keypad;
> + struct resource *res;
> + struct input_dev *input_dev;
> + unsigned short *keycodes;
> + unsigned int row_shift;
> + unsigned int val;
> + int ret;
> +
> + 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 <= 0) || (pdata->rows > SAMSUNG_MAX_ROWS))
> + return -EINVAL;
how about making pdata->rows unsigned then if -ve values are illegal
> + if ((pdata->cols <= 0) || (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);
> + keypad = kzalloc(sizeof(*keypad), GFP_KERNEL);
> + keycodes = kzalloc((pdata->rows << row_shift) * sizeof(*keycodes),
> + GFP_KERNEL);
you could allocate this in one go.
> + input_dev = input_allocate_device();
> + if (!keypad || !keycodes || !input_dev) {
> + ret = -ENOMEM;
> + goto err_free_mem;
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + ret = -ENODEV;
> + goto err_free_mem;
> + }
> +
> + keypad->base = ioremap(res->start, resource_size(res));
> + if (!keypad->base) {
> + ret = -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");
> + ret = PTR_ERR(keypad->clk);
> + goto err_unmap_base;
> + }
> + clk_enable(keypad->clk);
> +
> + keypad->input_dev = input_dev;
> + keypad->keycodes = keycodes;
> + keypad->row_shift = row_shift;
> + keypad->rows = pdata->rows;
> + keypad->cols = pdata->cols;
> +
> + INIT_WORK(&keypad->work, samsung_kp_worker);
> +
> + setup_timer(&keypad->timer, samsung_kp_timer, (unsigned long)keypad);
> +
> + /* enable interrupt and wakeup bit */
> + val = SAMSUNG_INT_F_EN | SAMSUNG_INT_R_EN | SAMSUNG_WAKEUPEN;
> + writel(val, keypad->base + SAMSUNG_KEYIFCON);
> +
> + /* KEYIFCOL reg clear */
> + writel(0, keypad->base + SAMSUNG_KEYIFCOL);
> +
> + keypad->irq = platform_get_irq(pdev, 0);
> + if (keypad->irq < 0) {
> + ret = keypad->irq;
> + goto err_disable_clk;
> + }
> +
> + ret = request_irq(keypad->irq, samsung_kp_interrupt, 0,
> + dev_name(&pdev->dev), keypad);
> +
> + if (ret)
> + goto err_disable_clk;
> +
> + input_dev->name = pdev->name;
> + input_dev->id.bustype = BUS_HOST;
> + input_dev->dev.parent = &pdev->dev;
> +
> + input_dev->evbit[0] = BIT_MASK(EV_KEY);
> + if (pdata->rep)
> + input_dev->evbit[0] |= BIT_MASK(EV_REP);
> +
> + input_dev->keycode = keycodes;
> + input_dev->keycodesize = sizeof(*keycodes);
> + input_dev->keycodemax = pdata->rows << row_shift;
> +
> + matrix_keypad_build_keymap(keymap_data, row_shift,
> + input_dev->keycode, input_dev->keybit);
> +
> + ret = input_register_device(keypad->input_dev);
> + if (ret)
> + goto err_free_irq;
> +
> + platform_set_drvdata(pdev, keypad);
> + clk_disable(keypad->clk);
> +
> + return 0;
> +
> +err_free_irq:
> + free_irq(keypad->irq, keypad);
> +err_disable_clk:
> + clk_disable(keypad->clk);
> + clk_put(keypad->clk);
> +err_unmap_base:
> + iounmap(keypad->base);
> +err_free_mem:
> + input_free_device(input_dev);
> + kfree(keycodes);
> + kfree(keypad);
> +
> + return ret;
> +}
> +
> +static int __devexit samsung_kp_remove(struct platform_device *pdev)
> +{
> + struct samsung_kp *keypad = platform_get_drvdata(pdev);
> +
> + free_irq(keypad->irq, keypad);
> + cancel_work_sync(&keypad->work);
> + del_timer_sync(&keypad->timer);
> +
> + platform_set_drvdata(pdev, NULL);
> + input_unregister_device(keypad->input_dev);
> +
> + clk_disable(keypad->clk);
> + clk_put(keypad->clk);
> +
> + iounmap(keypad->base);
> + kfree(keypad->keycodes);
> + kfree(keypad);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM
> +static int samsung_kp_suspend(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct samsung_kp *keypad = platform_get_drvdata(pdev);
> +
> + disable_irq(keypad->irq);
> +
> + return 0;
> +}
> +
> +static int samsung_kp_resume(struct device pdev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct samsung_kp *keypad = platform_get_drvdata(pdev);
> + unsigned int val;
> +
> + clk_enable(keypad->clk);
> +
> + /* enable interrupt and wakeup bit */
> + val = SAMSUNG_INT_F_EN | SAMSUNG_INT_R_EN | SAMSUNG_WAKEUPEN;
> + writel(val, keypad->base + SAMSUNG_KEYIFCON);
> +
> + /* KEYIFCOL reg clear */
> + writel(0, keypad->base + SAMSUNG_KEYIFCOL);
> +
> + enable_irq(keypad->irq);
> + clk_disable(keypad->clk);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops samsung_kp_pm_ops = {
> + .suspend = samsung_kp_suspend,
> + .resume = samsung_kp_resume,
> +};
> +#endif
> +
> +static struct platform_driver samsung_kp_driver = {
> + .probe = samsung_kp_probe,
> + .remove = __devexit_p(samsung_kp_remove),
> + .driver = {
> + .name = "samsung-keypad",
> + .owner = THIS_MODULE,
> +#ifdef CONFIG_PM
> + .pm = &samsung_kp_pm_ops,
> +#endif
> + },
> +};
> +
> +static int __init samsung_kp_init(void)
> +{
> + return platform_driver_register(&samsung_kp_driver);
> +}
> +
> +static void __exit samsung_kp_exit(void)
> +{
> + platform_driver_unregister(&samsung_kp_driver);
> +}
> +
> +module_init(samsung_kp_init);
> +module_exit(samsung_kp_exit);
> +
> +MODULE_DESCRIPTION("Samsung keypad driver");
> +MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>");
> +MODULE_AUTHOR("Donghwa Lee <dh09.lee@xxxxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> --
> 1.7.0.4
>
>
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--
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