[PATCH 09/10] input: enable touch on 88pm860x
Dmitry Torokhov
dmitry.torokhov at gmail.com
Fri Nov 13 21:54:26 EST 2009
Hi Haojian,
On Fri, Nov 13, 2009 at 04:04:44AM -0500, Haojian Zhuang wrote:
> From 122d2c29ffef393b533628c2be8bdb308220331f Mon Sep 17 00:00:00 2001
> From: Haojian Zhuang <haojian.zhuang at marvell.com>
> Date: Thu, 12 Nov 2009 12:15:51 -0500
> Subject: [PATCH] input: enable touch on 88pm860x
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
> drivers/input/touchscreen/88pm860x-ts.c | 222 +++++++++++++++++++++++++++++++
> drivers/input/touchscreen/Kconfig | 7 +
> drivers/input/touchscreen/Makefile | 1 +
> 3 files changed, 230 insertions(+), 0 deletions(-)
> create mode 100644 drivers/input/touchscreen/88pm860x-ts.c
>
> diff --git a/drivers/input/touchscreen/88pm860x-ts.c
> b/drivers/input/touchscreen/88pm860x-ts.c
> new file mode 100644
> index 0000000..b65ef13
> --- /dev/null
> +++ b/drivers/input/touchscreen/88pm860x-ts.c
> @@ -0,0 +1,222 @@
> +/*
> + * Touchscreen driver for Marvell 88PM860x
> + *
> + * Copyright (C) 2009 Marvell International Ltd.
> + * Haojian Zhuang <haojian.zhuang at marvell.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/input.h>
> +#include <linux/mfd/88pm860x.h>
> +
> +#define MEAS_LEN (8)
> +#define ACCURATE_BIT (12)
> +
> +/* touch register */
> +#define MEAS_EN3 (0x52)
> +
> +#define MEAS_TSIX_1 (0x8D)
> +#define MEAS_TSIX_2 (0x8E)
> +#define MEAS_TSIY_1 (0x8F)
> +#define MEAS_TSIY_2 (0x90)
> +#define MEAS_TSIZ1_1 (0x91)
> +#define MEAS_TSIZ1_2 (0x92)
> +#define MEAS_TSIZ2_1 (0x93)
> +#define MEAS_TSIZ2_2 (0x94)
> +
> +/* bit definitions of touch */
> +#define MEAS_PD_EN (1 << 3)
> +#define MEAS_TSIX_EN (1 << 4)
> +#define MEAS_TSIY_EN (1 << 5)
> +
> +struct pm860x_touch {
> + struct input_dev *idev;
> + struct pm860x_chip *chip;
> + int irq;
> + int count; /* record open count */
> +};
> +
> +static void pm860x_touch_handler(struct pm860x_chip *chip, int irq, void *data)
> +{
> + struct pm860x_touch *touch = data;
> + unsigned char buf[MEAS_LEN];
> + int x, y, pen_down;
> + int ret;
> +
> + pm860x_mask_irq(chip, irq);
> + ret = pm860x_bulk_read(chip->parent, DESC_8607, MEAS_TSIX_1,
> + MEAS_LEN, buf);
> + if (ret < 0)
> + goto out;
> +
> + pen_down = buf[1] & (1 << 6);
> + x = ((buf[0] & 0xFF) << 4) | (buf[1] & 0x0F);
> + y = ((buf[2] & 0xFF) << 4) | (buf[3] & 0x0F);
> +
> + if (pen_down) {
> + input_report_abs(touch->idev, ABS_X, x);
> + input_report_abs(touch->idev, ABS_Y, y);
> + input_report_abs(touch->idev, ABS_PRESSURE, 255);
> + input_report_abs(touch->idev, BTN_TOUCH, 1);
> + } else {
> + input_report_abs(touch->idev, ABS_PRESSURE, 0);
Your device does not seem to be reporting real pressure so please don't
fake ABS_PRESSURE events.
> + input_report_abs(touch->idev, ABS_TOOL_WIDTH, 1);
This event is used to report size of the touching object, if you don't
know it do not report.
> + input_report_abs(touch->idev, BTN_TOUCH, 0);
There certainly isn't EV_ABS/BTN_TOUCH event, you meant to use
input_report_key().
> + }
> + input_sync(touch->idev);
> + pm860x_unmask_irq(chip, irq);
> +
> + if (pen_down)
> + dev_dbg(chip->dev, "pen down at [%d, %d]\n", x, y);
> + else
> + dev_dbg(chip->dev, "pen release\n");
> +out:
> + return;
> +}
> +
> +static int pm860x_touch_open(struct input_dev *dev)
> +{
> + struct pm860x_touch *touch = input_get_drvdata(dev);
> + struct pm860x_chip *chip = touch->chip;
> + int data, ret;
> +
> + if (++touch->count) {
Input core takes care to call open only when first client opens the
device, no need to count here.
> + data = MEAS_PD_EN | MEAS_TSIX_EN | MEAS_TSIY_EN;
> + ret = pm860x_set_bits(chip->parent, DESC_8607, MEAS_EN3,
> + data, data);
> + if (ret < 0)
> + goto out;
> + pm860x_unmask_irq(chip, touch->irq);
> + }
> + return 0;
> +out:
> + return ret;
> +}
> +
> +static void pm860x_touch_close(struct input_dev *dev)
> +{
> + struct pm860x_touch *touch = input_get_drvdata(dev);
> + struct pm860x_chip *chip = touch->chip;
> + int data;
> +
> + if (--touch->count == 0) {
Same goes for close.
> + data = MEAS_PD_EN | MEAS_TSIX_EN | MEAS_TSIY_EN;
> + pm860x_set_bits(chip->parent, DESC_8607, MEAS_EN3,
> + data, 0);
> + pm860x_mask_irq(chip, touch->irq);
> + }
> +}
> +
> +static int __devinit pm860x_touch_probe(struct platform_device *pdev)
> +{
> + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
> + struct pm860x_plat_data *pm860x_pdata;
> + struct pm860x_touch_pdata *pdata;
> + struct pm860x_touch *touch;
> + int irq, ret;
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + dev_err(&pdev->dev, "No IRQ resource!\n");
> + return -EINVAL;
> + }
> +
> + if (pdev->dev.parent->platform_data) {
> + pm860x_pdata = pdev->dev.parent->platform_data;
> + pdata = pm860x_pdata->touch;
> + } else
> + pdata = NULL;
I don't see pdata being used...
> +
> + touch = kzalloc(sizeof(struct pm860x_touch), GFP_KERNEL);
> + if (touch == NULL)
> + return -ENOMEM;
> + dev_set_drvdata(&pdev->dev, touch);
> +
> + touch->idev = input_allocate_device();
> + if (touch->idev == NULL) {
> + dev_err(&pdev->dev, "Failed to allocate input device!\n");
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + touch->idev->name = "88pm860x-touch";
> + touch->idev->dev.parent = &pdev->dev;
> + touch->idev->open = pm860x_touch_open;
> + touch->idev->close = pm860x_touch_close;
> + touch->chip = chip;
> + touch->irq = irq;
> + touch->count = 0;
> + input_set_drvdata(touch->idev, touch);
> +
> + ret = pm860x_request_irq(chip, irq, pm860x_touch_handler, touch);
> + if (ret < 0)
> + goto out_irq;
> +
> + set_bit(EV_ABS, touch->idev->evbit);
> + set_bit(ABS_X, touch->idev->absbit);
> + set_bit(ABS_Y, touch->idev->absbit);
> + set_bit(ABS_PRESSURE, touch->idev->absbit);
> + set_bit(EV_SYN, touch->idev->evbit);
> + set_bit(EV_KEY, touch->idev->evbit);
> + set_bit(BTN_TOUCH, touch->idev->keybit);
__set_bit(), no need to lock the bus. Also temprary for input device
looks more pleasing to an eye and probably saves a couple of bytes.
> +
> + input_set_abs_params(touch->idev, ABS_X, 0, 1 << ACCURATE_BIT, 0, 0);
> + input_set_abs_params(touch->idev, ABS_Y, 0, 1 << ACCURATE_BIT, 0, 0);
> + input_set_abs_params(touch->idev, ABS_PRESSURE, 0, 255, 0, 0);
> + input_set_abs_params(touch->idev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
> +
> + ret = input_register_device(touch->idev);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to register touch!\n");
> + goto out_rg;
> + }
> +
> + platform_set_drvdata(pdev, touch);
> + return 0;
> +out_rg:
> + pm860x_free_irq(chip, irq);
> +out_irq:
> + input_free_device(touch->idev);
> +out:
> + kfree(touch);
> + return ret;
> +}
> +
> +static int __devexit pm860x_touch_remove(struct platform_device *pdev)
> +{
> + struct pm860x_touch *touch = platform_get_drvdata(pdev);
> +
> + input_unregister_device(touch->idev);
> + return 0;
> +}
> +
> +static struct platform_driver pm860x_touch_driver = {
> + .driver = {
> + .name = "88pm860x-touch",
> + .owner = THIS_MODULE,
> + },
> + .probe = pm860x_touch_probe,
> + .remove = pm860x_touch_remove,
__devexit_p()
> +};
> +
> +static int __init pm860x_touch_init(void)
> +{
> + return platform_driver_register(&pm860x_touch_driver);
> +}
> +module_init(pm860x_touch_init);
> +
> +static void __exit pm860x_touch_exit(void)
> +{
> + platform_driver_unregister(&pm860x_touch_driver);
> +}
> +module_exit(pm860x_touch_exit);
> +
> +MODULE_DESCRIPTION("Touchscreen driver for Marvell Semiconductor 88PM860x");
> +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang at marvell.com>");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:88pm860x-touch");
> diff --git a/drivers/input/touchscreen/Kconfig
> b/drivers/input/touchscreen/Kconfig
> index 8cc453c..0b06a53 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -530,4 +530,11 @@ config TOUCHSCREEN_PCAP
>
> To compile this driver as a module, choose M here: the
> module will be called pcap_ts.
> +
> +config TOUCHSCREEN_88PM860X
> + bool "Marvell 88PM860x touchscreen"
> + depends on MFD_88PM860X
> + help
> + Say Y here if you have a 88PM860x PMIC and want to enable
> + support for the built-in touchscreen.
No module option?
> endif
> diff --git a/drivers/input/touchscreen/Makefile
> b/drivers/input/touchscreen/Makefile
> index 15fa62c..9180479 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -42,3 +42,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) +=
> mainstone-wm97xx.o
> obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
> obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
> obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
> +obj-$(CONFIG_TOUCHSCREEN_88PM860X) += 88pm860x-ts.o
Would appreciate if you arrange makefile alphabetically.
Thanks.
--
Dmitry
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