Hi Wan ZongShun,
>
>
> Add keypad driver for w90p910 evb.
This commit text not sufficient to describe this driver. Please add more detail.
> +config KEYBOARD_W90P910
> + tristate "W90P910 Matrix Keypad support"
> + depends on ARCH_W90X900
> + help
> + Say Y here to enable the matrix keypad on the W90P910 evb.
EVB? Evaluation Board? If yes, please write evaluation board instead,
and I hope it should even work with other boards designed with this
core.
> diff --git a/drivers/input/keyboard/w90p910_keypad.c b/drivers/input/keyboard/w90p910_keypad.c
> new file mode 100644
> index 0000000..e8dfcc8
> --- /dev/null
> +++ b/drivers/input/keyboard/w90p910_keypad.c
> @@ -0,0 +1,315 @@
> +/*
> + * Copyright (c) 2008 Nuvoton technology corporation.
> + *
Want to update this to 2008-2009 ?
> + * Wan ZongShun <mcuos.com@xxxxxxxxx>
> + *
> + * 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;version 2 of the License.
> + *
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/input.h>
> +#include <linux/device.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +
> +#include <asm/mach/arch.h>
> +#include <asm/mach/map.h>
Why map.h?
> +
> +#include <mach/hardware.h>
> +#include <mach/w90p910_keypad.h>
> +#include <mach/regs-clock.h>
Do you need this regs-clock.h and hardware.h?
> +
> +/* Keypad Interface Control Registers */
> +#define KPI_CONF 0x00
> +#define KPI_3KCONF 0x04
> +#define KPI_LPCONF 0x08
> +#define KPI_STATUS 0x0C
> +
> +#define IS1KEY (0x01 << 16)
> +#define INTTR (0x01 << 21)
> +#define KEY0R (0x0f << 3)
> +#define KEY0C 0x07
> +#define RESET 0x00
> +#define PRESCALE 0xfa
> +#define DEBOUNCE (0x50 << 8)
> +#define KSIZE0 (0x01 << 16)
> +#define KSIZE1 (0x01 << 17)
> +#define KPSEL (0x01 << 19)
> +#define ENKP (0x01 << 18)
> +
> +#define KGET_RAW(n) (((n) & KEY0R) >> 3)
> +#define KGET_COLUMN(n) ((n) & KEY0C)
> +
> +#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
> +#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
> +#define res_size(res) ((res)->end - (res)->start + 1)
> +
Use resource_size please.
> +#define MAX_MATRIX_KEY_NUM (8 * 8)
> +
> +struct w90p910_keypad {
> + struct w90p910_keypad_platform_data *pdata;
> + struct clk *clk;
> + struct input_dev *input_dev;
> + void __iomem *mmio_base;
> + int irq;
> + unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
> +};
> +
> +static void w90p910_keypad_build_keycode(struct w90p910_keypad *keypad)
> +{
> + struct w90p910_keypad_platform_data *pdata = keypad->pdata;
> + struct input_dev *input_dev = keypad->input_dev;
> + unsigned int *key;
> + int i;
> +
> + key = &pdata->matrix_key_map[0];
> + for (i = 0; i < pdata->matrix_key_map_size; i++, key++) {
> + int row = ((*key) >> 28) & 0xf;
> + int col = ((*key) >> 24) & 0xf;
> + int code = (*key) & 0xffffff;
> +
> + keypad->matrix_keycodes[(row << 3) + col] = code;
> + set_bit(code, input_dev->keybit);
__set_bit please.
> + }
> +
> +}
> +
> +static inline unsigned int lookup_matrix_keycode(
> + struct w90p910_keypad *keypad, int row, int col)
> +{
> + return keypad->matrix_keycodes[(row << 3) + col];
> +}
> +
> +static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
> + unsigned int status)
> +{
> + unsigned int row, col, val;
> +
> + row = KGET_RAW(status);
> + col = KGET_COLUMN(status);
> +
> + val = lookup_matrix_keycode(keypad, row, col);
> +
> + input_report_key(keypad->input_dev, val, 1);
> +
> + input_sync(keypad->input_dev);
> +
> + input_report_key(keypad->input_dev, val, 0);
So, we don't get interrupt on key release?
> +
> + input_sync(keypad->input_dev);
> +}
> +
> +static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
> +{
> + struct w90p910_keypad *keypad = dev_id;
> + unsigned int kstatus, val;
> +
> + kstatus = keypad_readl(KPI_STATUS);
> +
> + val = INTTR | IS1KEY;
> +
> + if (kstatus & val)
> + w90p910_keypad_scan_matrix(keypad, kstatus);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int w90p910_keypad_open(struct input_dev *dev)
> +{
> + struct w90p910_keypad *keypad = input_get_drvdata(dev);
> + unsigned int val;
> +
> + /* Enable unit clock */
> + clk_enable(keypad->clk);
> +
> + keypad_writel(KPI_CONF, RESET);
> + keypad_writel(KPI_3KCONF, RESET);
> + keypad_writel(KPI_LPCONF, RESET);
> + keypad_writel(KPI_STATUS, RESET);
> +
> + val = keypad_readl(KPI_CONF);
> + val |= (PRESCALE | DEBOUNCE | KPSEL | ENKP);
Care to make someof this configurable through platform data? May be
debounce and prescale can be configured.
> + val &= ~(KSIZE0 | KSIZE1);
> +
> + keypad_writel(KPI_CONF, val);
> +
> + return 0;
> +}
> +
> +static void w90p910_keypad_close(struct input_dev *dev)
> +{
> + struct w90p910_keypad *keypad = input_get_drvdata(dev);
> +
> + /* Disable clock unit */
> + clk_disable(keypad->clk);
So this controller doesn't support putting controller FSM into IDLE
state by writing some bits into it or is it doing auto-sleep?
> +}
> +
> +static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
> +{
> + struct w90p910_keypad *keypad;
> + struct input_dev *input_dev;
> + struct resource *res;
> + int irq, error;
> +
> + keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
> + if (keypad == NULL) {
> + dev_err(&pdev->dev, "failed to allocate driver data\n");
> + return -ENOMEM;
> + }
> +
> + keypad->pdata = pdev->dev.platform_data;
> + if (keypad->pdata == NULL) {
> + dev_err(&pdev->dev, "no platform data defined\n");
> + error = -EINVAL;
> + goto failed_free;
> + }
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + dev_err(&pdev->dev, "failed to get keypad irq\n");
> + error = -ENXIO;
> + goto failed_free;
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (res == NULL) {
> + dev_err(&pdev->dev, "failed to get I/O memory\n");
> + error = -ENXIO;
> + goto failed_free;
> + }
> +
> + res = request_mem_region(res->start, res_size(res), pdev->name);
> + if (res == NULL) {
> + dev_err(&pdev->dev, "failed to request I/O memory\n");
> + error = -EBUSY;
> + goto failed_free;
> + }
> +
> + keypad->mmio_base = ioremap(res->start, res_size(res));
> + if (keypad->mmio_base == NULL) {
> + dev_err(&pdev->dev, "failed to remap I/O memory\n");
> + error = -ENXIO;
> + goto failed_free_mem;
> + }
> +
> + keypad->clk = clk_get(&pdev->dev, NULL);
> + if (IS_ERR(keypad->clk)) {
> + dev_err(&pdev->dev, "failed to get keypad clock\n");
> + error = PTR_ERR(keypad->clk);
> + goto failed_free_io;
> + }
> +
> + /* Create and register the input driver. */
> + input_dev = input_allocate_device();
> + if (!input_dev) {
> + dev_err(&pdev->dev, "failed to allocate input device\n");
> + error = -ENOMEM;
> + goto failed_put_clk;
> + }
> +
> + /* set multi-function pin for w90p910 kpi. */
> + mfp_set_groupi(&pdev->dev);
> +
Could you please point me to implementation of this API? I believe
this is pin-multiplexing code.
> + input_dev->name = pdev->name;
> + input_dev->id.bustype = BUS_HOST;
> + input_dev->open = w90p910_keypad_open;
> + input_dev->close = w90p910_keypad_close;
> + input_dev->dev.parent = &pdev->dev;
> +
> + keypad->input_dev = input_dev;
> + input_set_drvdata(input_dev, keypad);
> +
> + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
EV_REP can be done as per platform data, but not a problem to enable
by default if keypad controller itself is not supporting it.
> + w90p910_keypad_build_keycode(keypad);
> + platform_set_drvdata(pdev, keypad);
> +
> + error = request_irq(irq, w90p910_keypad_irq_handler, IRQF_DISABLED,
> + pdev->name, keypad);
> + if (error) {
> + dev_err(&pdev->dev, "failed to request IRQ\n");
> + goto failed_free_dev;
> + }
> +
> + keypad->irq = irq;
> +
> + /* Register the input device */
> + error = input_register_device(input_dev);
> + if (error) {
> + dev_err(&pdev->dev, "failed to register input device\n");
> + goto failed_free_irq;
> + }
> +
> + return 0;
> +
> +failed_free_irq:
> + free_irq(irq, pdev);
> + platform_set_drvdata(pdev, NULL);
> +failed_free_dev:
> + input_free_device(input_dev);
> +failed_put_clk:
> + clk_put(keypad->clk);
> +failed_free_io:
> + iounmap(keypad->mmio_base);
> +failed_free_mem:
> + release_mem_region(res->start, res_size(res));
> +failed_free:
> + kfree(keypad);
> + return error;
> +}
> +
> +static int __devexit w90p910_keypad_remove(struct platform_device *pdev)
> +{
> + struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
> + struct resource *res;
> +
> + free_irq(keypad->irq, pdev);
> +
> + clk_disable(keypad->clk);
> + clk_put(keypad->clk);
> +
> + input_unregister_device(keypad->input_dev);
> + input_free_device(keypad->input_dev);
input_free_device not needed after input_unregister_device.
> +
> + iounmap(keypad->mmio_base);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + release_mem_region(res->start, res_size(res));
> +
> + platform_set_drvdata(pdev, NULL);
> + kfree(keypad);
> + return 0;
> +}
> +
> +static struct platform_driver w90p910_keypad_driver = {
> + .probe = w90p910_keypad_probe,
> + .remove = __devexit_p(w90p910_keypad_remove),
Care to add suspend/resume support?
> + .driver = {
> + .name = "w90p910-keypad",
> + .owner = THIS_MODULE,
> + },
> +};
> +
--
---Trilok Soni
http://triloksoni.wordpress.com
http://www.linkedin.com/in/triloksoni
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
