[Patch 07/07] Touch: DA9052/53 touch screen driver v1

Ashish Jangam ashish.jangam at kpitcummins.com
Tue Mar 13 12:25:06 UTC 2012


Any update on the below patch
On Mon, 2012-02-06 at 18:21 +0530, Ashish Jangam wrote:
> This driver adds support for DA9052/53 4-wire resistive ADC interfaced
> touchscreen controller.
> 
> DA9052/53 is a MFD therefore this driver depends on DA9052/53 core
> driver for core functionalities.
> 
> This patch is functionally tested on Samsung SMDKV6410.
> 
> Signed-off-by: David Dajun Chen <dchen at diasemi.com>
> Signed-off-by: Ashish Jangam <ashish.jangam at kpitcummins.com>
> ---
>  drivers/input/touchscreen/Kconfig      |    7 +
>  drivers/input/touchscreen/Makefile     |    1 +
>  drivers/input/touchscreen/da9052_tsi.c |  353 ++++++++++++++++++++++++++++++++
>  3 files changed, 361 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/input/touchscreen/da9052_tsi.c
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 2b21a70..32a3e26 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -187,6 +187,13 @@ config TOUCHSCREEN_DA9034
>  	  Say Y here to enable the support for the touchscreen found
>  	  on Dialog Semiconductor DA9034 PMIC.
>  
> +config TOUCHSCREEN_DA9052
> +	tristate "Dialog DA9052/DA9053 TSI"
> +	depends on PMIC_DA9052
> +	help
> +	  Say y here to support the touchscreen found on Dialog Semiconductor
> +	  DA9052-BC and DA9053-AA/Bx PMICs.
> +
>  config TOUCHSCREEN_DYNAPRO
>  	tristate "Dynapro serial touchscreen"
>  	select SERIO
> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
> index d9acbdc..c76b21c 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -22,6 +22,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)	+= cyttsp_core.o
>  obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o
>  obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
>  obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
> +obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
>  obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
>  obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE)	+= hampshire.o
>  obj-$(CONFIG_TOUCHSCREEN_GUNZE)		+= gunze.o
> diff --git a/drivers/input/touchscreen/da9052_tsi.c b/drivers/input/touchscreen/da9052_tsi.c
> new file mode 100644
> index 0000000..8c672ee
> --- /dev/null
> +++ b/drivers/input/touchscreen/da9052_tsi.c
> @@ -0,0 +1,353 @@
> +/*
> + * TSI driver for Dialog DA9052
> + *
> + * Copyright(c) 2012 Dialog Semiconductor Ltd.
> + *
> + * Author: David Dajun Chen <dchen at diasemi.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/module.h>
> +#include <linux/input.h>
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/interrupt.h>
> +
> +#include <linux/mfd/da9052/reg.h>
> +#include <linux/mfd/da9052/da9052.h>
> +
> +#define TSI_PEN_DOWN_STATUS 0x40
> +
> +struct da9052_tsi {
> +	struct da9052 *da9052;
> +	struct input_dev *dev;
> +	struct delayed_work ts_pen_work;
> +	int irq_pendwn;
> +	int irq_datardy;
> +};
> +
> +static int da9052_ts_start(struct da9052_tsi *tsi)
> +{
> +	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
> +				 1 << 0, 1 << 0);
> +}
> +
> +static int da9052_ts_stop(struct da9052_tsi *tsi)
> +{
> +	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, 0);
> +}
> +
> +static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data)
> +{
> +	struct da9052_tsi *tsi = data;
> +
> +	/* Mask PEN_DOWN event and unmask TSI_READY event */
> +	disable_irq_nosync(tsi->irq_pendwn);
> +	enable_irq(tsi->irq_datardy);
> +
> +	da9052_ts_start(tsi);
> +
> +	input_report_key(tsi->dev, BTN_TOUCH, 1);
> +	input_sync(tsi->dev);
> +
> +	schedule_delayed_work(&tsi->ts_pen_work, HZ/50);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static int da9052_ts_read(struct da9052_tsi *tsi)
> +{
> +	int ret = 0;
> +	u16 x, y, z;
> +	u8 v;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
> +	if (ret < 0)
> +		goto exit;
> +
> +	x = (u16) ret;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
> +	if (ret < 0)
> +		goto exit;
> +
> +	y = (u16) ret;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
> +	if (ret < 0)
> +		goto exit;
> +
> +	z = (u16) ret;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
> +	if (ret < 0)
> +		goto exit;
> +
> +	v = (u8) ret;
> +
> +	x = ((x << 2) & 0x3fc) | (v & 0x3);
> +	y = ((y << 2) & 0x3fc) | ((v & 0xc) >> 2);
> +	z = ((z << 2) & 0x3fc) | ((v & 0x30) >> 4);
> +
> +	input_report_abs(tsi->dev, ABS_X, x);
> +	input_report_abs(tsi->dev, ABS_Y, y);
> +	input_report_abs(tsi->dev, ABS_PRESSURE, z);
> +	input_report_key(tsi->dev, BTN_TOUCH, 1);
> +	input_sync(tsi->dev);
> +
> +exit:
> +	return ret;
> +}
> +
> +static irqreturn_t da9052_ts_datardy_irq(int irq, void *data)
> +{
> +	struct da9052_tsi *tsi = data;
> +
> +	da9052_ts_read(tsi);
> +	return IRQ_HANDLED;
> +}
> +
> +static void da9052_ts_pen_work(struct work_struct *work)
> +{
> +	struct da9052_tsi *tsi = container_of(work, struct da9052_tsi,
> +					      ts_pen_work.work);
> +	struct input_dev *ip_dev = tsi->dev;
> +	int ret;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
> +	if (ret < 0)
> +		return;
> +
> +	if (ret & TSI_PEN_DOWN_STATUS) /* Pen Down */
> +		schedule_delayed_work(&tsi->ts_pen_work, HZ/50);
> +	else {
> +		/* Pen UP */
> +		da9052_ts_stop(tsi);
> +
> +		/* Mask TSI_READY event and unmask PEN_DOWN event */
> +		disable_irq(tsi->irq_datardy);
> +		enable_irq(tsi->irq_pendwn);
> +
> +		/* Report Pen UP */
> +		input_report_abs(ip_dev, ABS_PRESSURE, 0);
> +		input_report_key(ip_dev, BTN_TOUCH, 0);
> +		input_sync(ip_dev);
> +	}
> +}
> +
> +static int __devinit da9052_ts_configure_gpio(struct da9052 *da9052)
> +{
> +	int ret;
> +
> +	ret = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0);
> +
> +	return ret;
> +}
> +
> +static int __devinit da9052_configure_tsi(struct da9052_tsi *tsi)
> +{
> +	ssize_t ret;
> +
> +	ret = da9052_ts_configure_gpio(tsi->da9052);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* Measure TSI sample every 1ms */
> +	ret = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
> +				1 << 6, 1 << 6);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */
> +	ret = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* Mask PEN_DOWN and TSI_READY events */
> +	disable_irq(tsi->irq_pendwn);
> +	disable_irq(tsi->irq_datardy);
> +
> +	/*Supply TSIRef through LD09 */
> +	ret = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
> +
> +	return ret;
> +}
> +
> +static int da9052_ts_input_open(struct input_dev *input_dev)
> +{
> +	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
> +
> +	/* Unmask PEN_DOWN event */
> +	enable_irq(tsi->irq_pendwn);
> +
> +	/* Enable Pen Detect Circuit */
> +	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
> +				 1 << 1, 1 << 1);
> +}
> +
> +static void da9052_ts_input_close(struct input_dev *input_dev)
> +{
> +	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
> +	int ret;
> +
> +	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
> +
> +	if (ret & TSI_PEN_DOWN_STATUS) /* Pen Down */
> +		disable_irq(tsi->irq_datardy);
> +	else
> +		disable_irq(tsi->irq_pendwn);
> +
> +	cancel_delayed_work_sync(&tsi->ts_pen_work);
> +
> +	da9052_ts_stop(tsi);
> +
> +	/* Disable Pen Detect Circuit */
> +	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
> +}
> +
> +static int __devinit da9052_ts_probe(struct platform_device *pdev)
> +{
> +	struct da9052_tsi *tsi;
> +	struct input_dev *input_dev;
> +	struct da9052 *da9052;
> +	int ret;
> +
> +	da9052 = dev_get_drvdata(pdev->dev.parent);
> +	if (da9052 == NULL)
> +		return -EINVAL;
> +
> +	tsi = devm_kzalloc(&pdev->dev, sizeof(struct da9052_tsi), GFP_KERNEL);
> +	if (!tsi)
> +		return -ENOMEM;
> +
> +	input_dev = input_allocate_device();
> +	if (!input_dev) {
> +		dev_err(tsi->da9052->dev, "Failed to allocate input device\n");
> +		ret = -ENOMEM;
> +		goto err_mem;
> +	}
> +
> +	INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work);
> +
> +	tsi->da9052 = da9052;
> +
> +	input_dev->id.version = 0x0101;
> +	input_dev->id.vendor = 0x15B6;
> +	input_dev->id.product = 0x9052;
> +	input_dev->name = "Dialog DA9052 TouchScreen Driver";
> +	input_dev->dev.parent = &pdev->dev;
> +	input_dev->open = da9052_ts_input_open;
> +	input_dev->close = da9052_ts_input_close;
> +	__set_bit(EV_ABS, input_dev->evbit);
> +	__set_bit(EV_KEY, input_dev->evbit);
> +	__set_bit(BTN_TOUCH, input_dev->keybit);
> +
> +	input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
> +	input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
> +	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);
> +
> +	tsi->dev = input_dev;
> +	input_set_drvdata(input_dev, tsi);
> +
> +	tsi->irq_pendwn = platform_get_irq_byname(pdev, "PENDWN");
> +	if (tsi->irq_pendwn < 0) {
> +		ret = tsi->irq_pendwn;
> +		goto err_input;
> +	}
> +
> +	ret = request_threaded_irq(tsi->irq_pendwn, NULL, da9052_ts_pendwn_irq,
> +				   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> +				   "PENDWN", tsi);
> +	if (ret < 0) {
> +		dev_err(tsi->da9052->dev,
> +			"Failed to register %s IRQ %d, error = %d\n", "PENDWN",
> +			tsi->irq_pendwn, ret);
> +		goto err_input;
> +	}
> +
> +	tsi->irq_datardy = platform_get_irq_byname(pdev, "TSIRDY");
> +	if (tsi->irq_datardy < 0) {
> +		ret = tsi->irq_datardy;
> +		goto err_pendwn_irq;
> +	}
> +
> +	ret = request_threaded_irq(tsi->irq_datardy, NULL,
> +				   da9052_ts_datardy_irq,
> +				   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> +				   "TSIRDY", tsi);
> +	if (ret < 0) {
> +		dev_err(tsi->da9052->dev,
> +			"Failed to register %s IRQ %d, error = %d\n", "TSIRDY",
> +			tsi->irq_datardy, ret);
> +		goto err_pendwn_irq;
> +	}
> +
> +	ret = da9052_configure_tsi(tsi);
> +	if (ret < 0)
> +		goto err_datardy_irq;
> +
> +	ret = input_register_device(tsi->dev);
> +	if (ret < 0)
> +		goto err_datardy_irq;
> +
> +	platform_set_drvdata(pdev, tsi);
> +
> +	return 0;
> +
> +err_datardy_irq:
> +	free_irq(tsi->irq_datardy, tsi);
> +err_pendwn_irq:
> +	free_irq(tsi->irq_pendwn, tsi);
> +err_input:
> +	input_free_device(input_dev);
> +err_mem:
> +	devm_kfree(&pdev->dev, tsi);
> +	return ret;
> +}
> +
> +static int  __devexit da9052_ts_remove(struct platform_device *pdev)
> +{
> +	struct da9052_tsi *tsi = platform_get_drvdata(pdev);
> +
> +	da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);
> +
> +	free_irq(tsi->irq_pendwn, tsi);
> +	free_irq(tsi->irq_datardy, tsi);
> +
> +	input_unregister_device(tsi->dev);
> +
> +	platform_set_drvdata(pdev, NULL);
> +
> +	devm_kfree(&pdev->dev, tsi);
> +
> +	return 0;
> +}
> +
> +static struct platform_driver da9052_tsi_driver = {
> +
> +	.probe = da9052_ts_probe,
> +	.remove = __devexit_p(da9052_ts_remove),
> +	.driver = {
> +		.name = "da9052-tsi",
> +		.owner = THIS_MODULE,
> +	},
> +};
> +
> +module_platform_driver(da9052_tsi_driver);
> +
> +MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
> +MODULE_AUTHOR("David Dajun Chen <dchen at diasemi.com>");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:da9052-tsi");
> 
> 





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