[PATCH] input: enable touch on 88pm860x
Haojian Zhuang
haojian.zhuang at marvell.com
Thu Nov 12 12:15:51 EST 2009
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);
+ input_report_abs(touch->idev, ABS_TOOL_WIDTH, 1);
+ input_report_abs(touch->idev, BTN_TOUCH, 0);
+ }
+ 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) {
+ 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) {
+ 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;
+
+ 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);
+
+ 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,
+};
+
+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.
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
--
1.5.6.5
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