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From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.arm.linux.org.uk,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	linux-input@vger.kernel.org
Subject: [PATCH 2/5] [input] add mc13783 touchscreen driver
Date: Wed, 12 Aug 2009 17:05:28 +0200	[thread overview]
Message-ID: <1250089531-10399-3-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1250089531-10399-2-git-send-email-s.hauer@pengutronix.de>

This driver provides support for the touchscreen interface
integrated into the Freescale MC13783.

changes since v1:

- remove unused functions
- use queue_delayed_work instead of queue_work
- report pen events as BTN_TOUCH instead of ABS_PRESSURE
- handle interrupt registration in open/close functions
- do not call input_free_device() on already registered
  input_device
- use platform_driver_probe instead of platform_driver_register
- add MODULE_ALIAS

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: linux-input@vger.kernel.org
---
 drivers/input/touchscreen/Kconfig      |   12 ++
 drivers/input/touchscreen/Makefile     |    1 +
 drivers/input/touchscreen/mc13783_ts.c |  222 ++++++++++++++++++++++++++++++++
 3 files changed, 235 insertions(+), 0 deletions(-)
 create mode 100644 drivers/input/touchscreen/mc13783_ts.c

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 72e2712..7451cf0 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -413,6 +413,18 @@ config TOUCHSCREEN_USB_COMPOSITE
 	  To compile this driver as a module, choose M here: the
 	  module will be called usbtouchscreen.
 
+config TOUCHSCREEN_MC13783
+	tristate "Freescale MC13783 touchscreen input driver"
+	depends on MFD_MC13783
+	help
+	  Say Y here if you have an Freescale MC13783 PMIC on your
+	  board and want to use its touchscreen
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mxc_ts.
+
 config TOUCHSCREEN_USB_EGALAX
 	default y
 	bool "eGalax, eTurboTouch CT-410/510/700 device support" if EMBEDDED
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 3e1c5e0..7b79598 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MTOUCH)	+= mtouch.o
 obj-$(CONFIG_TOUCHSCREEN_MK712)		+= mk712.o
+obj-$(CONFIG_TOUCHSCREEN_MC13783)	+= mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_HP600)		+= hp680_ts_input.o
 obj-$(CONFIG_TOUCHSCREEN_HP7XX)		+= jornada720_ts.o
 obj-$(CONFIG_TOUCHSCREEN_HTCPEN)	+= htcpen.o
diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c
new file mode 100644
index 0000000..80163f1
--- /dev/null
+++ b/drivers/input/touchscreen/mc13783_ts.c
@@ -0,0 +1,222 @@
+/*
+ * Driver for the Freescale Semiconductor MC13783 touchscreen.
+ *
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009 Sascha Hauer, Pengutronix
+ *
+ * Initial development of this code was funded by
+ * Phytec Messtechnik GmbH, http://www.phytec.de
+ *
+ * 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.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/mfd/mc13783-private.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#define MC13783_TS_NAME	"mc13783-ts"
+
+struct mc13783_ts_priv {
+	struct input_dev *idev;
+	struct mc13783 *mc13783;
+	struct delayed_work work;
+	struct workqueue_struct *workq;
+	unsigned int sample[4];
+};
+
+#define TS_MIN 1
+#define TS_MAX 1000
+
+static void mc13783_ts_handler(int irq, void *data)
+{
+	struct mc13783_ts_priv *priv = data;
+	unsigned int sts;
+
+	mc13783_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_STATUS_0, &sts);
+	mc13783_reg_write(priv->mc13783, MC13783_REG_INTERRUPT_STATUS_0,
+			sts & MC13783_INT_STAT_TSI);
+
+	if (sts & MC13783_INT_STAT_TSI)
+		queue_delayed_work(priv->workq, &priv->work, 0);
+}
+
+static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
+{
+	int x, y, press = 0;
+
+	x = (priv->sample[2] >> 2) & 0x3ff;
+	y = (priv->sample[3] >> 2) & 0x3ff;
+
+	pr_debug("mc13783_ts: x: %d y: %d\n", x, y);
+
+	if (x > TS_MIN && x < TS_MAX && y > TS_MIN && y < TS_MAX) {
+		press = 1;
+		input_report_abs(priv->idev, ABS_X, x);
+		input_report_abs(priv->idev, ABS_Y, y);
+
+		queue_delayed_work(priv->workq, &priv->work, HZ / 50);
+	}
+
+	input_report_key(priv->idev, BTN_TOUCH, press);
+	input_sync(priv->idev);
+}
+
+static void mc13783_ts_work(struct work_struct *work)
+{
+	struct mc13783_ts_priv *priv =
+		container_of(work, struct mc13783_ts_priv, work.work);
+	unsigned int mode = MC13783_ADC_MODE_TS;
+	unsigned int channel = 12;
+	int ret;
+
+	ret = mc13783_adc_do_conversion
+		(priv->mc13783, mode, channel, priv->sample);
+
+	if (!ret)
+		mc13783_ts_report_sample(priv);
+}
+
+static int mc13783_ts_open(struct input_dev *dev)
+{
+	struct mc13783_ts_priv *priv = input_get_drvdata(dev);
+	int ret;
+
+	ret = mc13783_register_irq(priv->mc13783, MC13783_IRQ_TS,
+		mc13783_ts_handler, priv);
+	if (ret)
+		return ret;
+
+	queue_delayed_work(priv->workq, &priv->work, HZ / 20);
+
+	return 0;
+}
+
+static void mc13783_ts_close(struct input_dev *dev)
+{
+	struct mc13783_ts_priv *priv = input_get_drvdata(dev);
+
+	mc13783_free_irq(priv->mc13783, MC13783_IRQ_TS);
+}
+
+static int __devinit mc13783_ts_probe(struct platform_device *pdev)
+{
+	struct mc13783_ts_priv *priv;
+	struct input_dev *idev;
+	int ret;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->mc13783 = dev_get_drvdata(pdev->dev.parent);
+
+	idev = input_allocate_device();
+	if (!idev) {
+		ret = -ENOMEM;
+		goto err_input_alloc;
+	}
+
+	priv->idev = idev;
+	idev->name = MC13783_TS_NAME;
+	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	idev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
+	idev->open = mc13783_ts_open;
+	idev->close = mc13783_ts_close;
+	input_set_abs_params(idev, ABS_X, TS_MIN, TS_MAX, 0, 0);
+	input_set_abs_params(idev, ABS_Y, TS_MIN, TS_MAX, 0, 0);
+
+	platform_set_drvdata(pdev, priv);
+
+	INIT_DELAYED_WORK(&priv->work, mc13783_ts_work);
+
+	priv->workq = create_singlethread_workqueue("mc13783_ts");
+	if (!priv->workq) {
+		ret = -ENOMEM;
+		goto err_input_alloc;
+	}
+
+	input_set_drvdata(idev, priv);
+
+	ret = input_register_device(priv->idev);
+	if (ret) {
+		dev_err(&pdev->dev,
+				"register input device failed with %d\n", ret);
+		goto err_failed_register;
+	}
+
+	/* unmask the ts wakeup interrupt */
+	mc13783_set_bits(priv->mc13783, MC13783_REG_INTERRUPT_MASK_0,
+			MC13783_INT_MASK_TSM, 0);
+
+	mc13783_adc_set_ts_status(priv->mc13783, 1);
+
+	return 0;
+
+err_failed_register:
+	input_free_device(priv->idev);
+err_input_alloc:
+	kfree(priv);
+
+	return ret;
+}
+
+static int __devexit mc13783_ts_remove(struct platform_device *pdev)
+{
+	struct mc13783_ts_priv *priv = platform_get_drvdata(pdev);
+
+	mc13783_adc_set_ts_status(priv->mc13783, 0);
+
+	cancel_delayed_work(&priv->work);
+	destroy_workqueue(priv->workq);
+
+	input_unregister_device(priv->idev);
+
+	kfree(priv);
+
+	return 0;
+}
+
+static struct platform_driver mc13783_ts_driver = {
+	.remove		= __devexit_p(mc13783_ts_remove),
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= MC13783_TS_NAME,
+	},
+};
+
+static int __init mc13783_ts_init(void)
+{
+	return platform_driver_probe(&mc13783_ts_driver, &mc13783_ts_probe);
+}
+
+static void __exit mc13783_ts_exit(void)
+{
+	platform_driver_unregister(&mc13783_ts_driver);
+}
+
+module_init(mc13783_ts_init);
+module_exit(mc13783_ts_exit);
+
+MODULE_DESCRIPTION("MC13783 input touchscreen driver");
+MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mc13783-touch");
-- 
1.6.3.3


  reply	other threads:[~2009-08-12 15:07 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-12 15:05 [PATCH V2] Freescale MC13783 PMIC support Sascha Hauer
2009-08-12 15:05 ` [PATCH 1/5] drivers/mfd: Add Freescale MC13783 driver Sascha Hauer
2009-08-12 15:05   ` Sascha Hauer [this message]
2009-08-12 15:05     ` [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Sascha Hauer
2009-08-12 15:05       ` [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver Sascha Hauer
2009-08-12 15:05         ` [PATCH 5/5] [regulator] Add a Freescale MC13783 regulator driver Sascha Hauer
2009-08-13 10:57           ` Liam Girdwood
2009-08-13 11:21             ` Samuel Ortiz
2009-08-13 11:38               ` Liam Girdwood
2009-08-12 16:42       ` [lm-sensors] [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Mark Brown
2009-08-13 13:37         ` Sascha Hauer
2009-08-13 14:16           ` Mark Brown
2009-08-12 16:04     ` [PATCH 2/5] [input] add mc13783 touchscreen driver Dmitry Torokhov
2009-08-13 12:26       ` Sascha Hauer
2009-08-13 15:52         ` Dmitry Torokhov
2009-12-04 19:52           ` [PATCH] " Uwe Kleine-König
2009-12-04 19:52             ` Uwe Kleine-König
2009-12-04 19:52             ` Uwe Kleine-König
2009-12-12  7:42             ` Dmitry Torokhov
2009-12-12  7:42               ` Dmitry Torokhov
2009-12-12  7:42               ` Dmitry Torokhov
2009-12-15 10:10               ` Uwe Kleine-König
2009-12-15 10:10                 ` Uwe Kleine-König
2009-12-15 16:45                 ` Dmitry Torokhov
  -- strict thread matches above, loose matches on Subject: below --
2009-08-11  9:07 [RFC] Freescale MC13783 PMIC support Sascha Hauer
2009-08-11  9:07 ` [PATCH 1/5] drivers/mfd: Add Freescale MC13783 driver Sascha Hauer
2009-08-11  9:07   ` [PATCH 2/5] [input] add mc13783 touchscreen driver Sascha Hauer
2009-08-11  9:07     ` Sascha Hauer
2009-08-12  2:15     ` Dmitry Torokhov
2009-08-12 11:10       ` Sascha Hauer
2009-08-12 11:16         ` Mark Brown
2009-08-12 11:34           ` Sascha Hauer
2009-08-12 16:01         ` Dmitry Torokhov
     [not found] <1249981166-4210-1-git-send-email-s.hauer@pengutronix.de>
2009-08-11  8:59 ` Sascha Hauer
2009-08-11  8:59   ` Sascha Hauer

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