2.6.21: add support for the ts controller on the console-vx-lcd gumstix boards

4 files changed, 600 insertions, 3 deletions

diff --git a/packages/linux/linux-2.6.21/gumstix-verdex/defconfig b/packages/linux/linux-2.6.21/gumstix-verdex/defconfig
index c6d5480089..d19cbf34ec 100644
--- a/packages/linux/linux-2.6.21/gumstix-verdex/defconfig
+++ b/packages/linux/linux-2.6.21/gumstix-verdex/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.21
-# Wed Oct  3 16:35:16 2007
+# Sun Oct  7 14:19:04 2007
 #
 CONFIG_ARM=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
@@ -1058,6 +1058,8 @@ CONFIG_I2C_PXA_SLAVE=y
 # CONFIG_SENSORS_PCA9539 is not set
 # CONFIG_SENSORS_PCF8591 is not set
 # CONFIG_SENSORS_MAX6875 is not set
+CONFIG_SENSORS_TSC2003=m
+CONFIG_SENSORS_TSC2003_SYSFS=m
 # CONFIG_I2C_DEBUG_CORE is not set
 # CONFIG_I2C_DEBUG_ALGO is not set
 # CONFIG_I2C_DEBUG_BUS is not set
diff --git a/packages/linux/linux-2.6.21/tsc2003-config.diff b/packages/linux/linux-2.6.21/tsc2003-config.diff
new file mode 100644
index 0000000000..ccad5ed696
--- /dev/null
+++ b/packages/linux/linux-2.6.21/tsc2003-config.diff
@@ -0,0 +1,31 @@
+--- /tmp/Kconfig	2007-10-07 14:13:14.000000000 +0200
++++ linux-2.6.21/drivers/i2c/chips/Kconfig	2007-10-07 14:13:56.902045000 +0200
+@@ -125,4 +125,18 @@
+ 	  This driver can also be built as a module.  If so, the module
+ 	  will be called max6875.
+ 
++config SENSORS_TSC2003
++	tristate "TI TSC2003"
++	depends on I2C && EXPERIMENTAL
++	default n
++	help
++	  Driver for TI tsc2003 touchscreen and sensor chip/
++
++config SENSORS_TSC2003_SYSFS
++	tristate "TI TSC2003 sysfs interface
++	depends on SENSORS_TSC2003
++	default n
++	help
++	  Enabled the sysfs interface for tsc2003
++
+ endmenu
+--- /tmp/Makefile	2007-10-07 14:14:14.000000000 +0200
++++ linux-2.6.21/drivers/i2c/chips/Makefile	2007-10-07 14:14:20.072045000 +0200
+@@ -12,6 +12,7 @@
+ obj-$(CONFIG_SENSORS_PCF8591)	+= pcf8591.o
+ obj-$(CONFIG_ISP1301_OMAP)	+= isp1301_omap.o
+ obj-$(CONFIG_TPS65010)		+= tps65010.o
++obj-$(CONFIG_SENSORS_TSC2003)   += tsc2003.o
+ 
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG
diff --git a/packages/linux/linux-2.6.21/tsc2003.c b/packages/linux/linux-2.6.21/tsc2003.c
new file mode 100644
index 0000000000..7af4a49374
--- /dev/null
+++ b/packages/linux/linux-2.6.21/tsc2003.c
@@ -0,0 +1,557 @@
+/*
+ *  linux/drivers/i2c/chips/tsc2003.c
+ *
+ *  Copyright (C) 2005 Bill Gatliff <bgat at billgatliff.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.
+ *
+ *  Driver for TI's TSC2003 I2C Touch Screen Controller
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/string.h>
+#include <linux/bcd.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <asm/delay.h>
+#include <linux/delay.h>
+
+#include <asm/arch/gpio.h>
+
+#define DRIVER_NAME "tsc2003"
+
+enum tsc2003_pd {
+	PD_POWERDOWN = 0, /* penirq */
+	PD_IREFOFF_ADCON = 1, /* no penirq */
+	PD_IREFON_ADCOFF = 2, /* penirq */
+	PD_IREFON_ADCON = 3, /* no penirq */
+	PD_PENIRQ_ARM = PD_IREFON_ADCOFF,
+	PD_PENIRQ_DISARM = PD_IREFON_ADCON,
+};
+
+enum tsc2003_m {
+	M_12BIT = 0,
+	M_8BIT = 1
+};
+
+enum tsc2003_cmd {
+	MEAS_TEMP0 = 0,
+	MEAS_VBAT1 = 1,
+	MEAS_IN1 = 2,
+	MEAS_TEMP1 = 4,
+	MEAS_VBAT2 = 5,
+	MEAS_IN2 = 6,
+	ACTIVATE_NX_DRIVERS = 8,
+	ACTIVATE_NY_DRIVERS = 9,
+	ACTIVATE_YNX_DRIVERS = 10,
+	MEAS_XPOS = 12,
+	MEAS_YPOS = 13,
+	MEAS_Z1POS = 14,
+	MEAS_Z2POS = 15
+};
+
+#define TSC2003_CMD(cn,pdn,m) (((cn) << 4) | ((pdn) << 2) | ((m) << 1))
+
+#define ADC_MAX ((1 << 12) - 1)
+
+struct tsc2003_data {
+	struct i2c_client *client;
+	struct input_dev *idev;
+	struct timer_list penirq_timer;
+	struct semaphore sem;
+	struct task_struct *tstask;
+	struct completion tstask_completion;
+	enum tsc2003_pd pd;
+	enum tsc2003_m m;
+	int vbat1;
+	int vbat2;
+	int temp0;
+	int temp1;
+	int in1;
+	int in2;
+};
+
+static int tsc2003_i2c_detect (struct i2c_adapter *adapter, int address,
+			       int kind);
+
+static inline int tsc2003_command (struct tsc2003_data *data,
+	enum tsc2003_cmd cmd,
+	enum tsc2003_pd pd)
+{
+	char c;
+	int ret;
+	down(&data->sem);
+	c = TSC2003_CMD(cmd, pd, data->m);
+	ret = i2c_master_send(data->client, &c, 1);
+	up(&data->sem);
+	return ret;
+}
+
+static int tsc2003_read (struct tsc2003_data *data,
+	enum tsc2003_cmd cmd,
+	enum tsc2003_pd pd,
+	int *val)
+{
+	char c;
+	char d[2];
+	int ret;
+
+	c = TSC2003_CMD(cmd, pd, data->m);
+	ret = i2c_master_send(data->client, &c, 1);
+
+	udelay(20);
+	ret = i2c_master_recv(data->client, d, data->m == M_12BIT ? 2 : 1);
+
+	if (val)
+	{
+		*val = d[0];
+		*val <<= 4;
+		if (data->m == M_12BIT)
+			*val += (d[1] >> 4);
+	}
+
+#if defined(CONFIG_I2C_DEBUG_CHIP)
+	printk(KERN_ERR "%s: val[%x] = %d\n",
+	       __FUNCTION__, cmd, (((int)d[0]) << 8) + d[1]);
+#endif
+
+	return 0;
+	if (!ret) ret = -ENODEV;
+	return ret;
+}
+
+static inline int tsc2003_read_temp0 (struct tsc2003_data *d, enum
+				      tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_TEMP0, pd, t);
+}
+
+static inline int tsc2003_read_temp1 (struct tsc2003_data *d, enum
+				      tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_TEMP1, pd, t);
+}
+
+static inline int tsc2003_read_xpos (struct tsc2003_data *d, enum
+				     tsc2003_pd pd, int *x)
+{
+	return tsc2003_read(d, MEAS_XPOS, pd, x);
+}
+
+static inline int tsc2003_read_ypos (struct tsc2003_data *d, enum
+				     tsc2003_pd pd, int *y)
+{
+	return tsc2003_read(d, MEAS_YPOS, pd, y);
+}
+
+static inline int tsc2003_read_pressure (struct tsc2003_data *d, enum
+					 tsc2003_pd pd, int *p)
+{
+	return tsc2003_read(d, MEAS_Z1POS, pd, p);
+}
+
+static inline int tsc2003_read_in1 (struct tsc2003_data *d, enum
+				    tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_IN1, pd, t);
+}
+
+static inline int tsc2003_read_in2 (struct tsc2003_data *d, enum
+				    tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_IN2, pd, t);
+}
+
+static inline int tsc2003_read_vbat1 (struct tsc2003_data *d, enum
+				      tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_VBAT1, pd, t);
+}
+
+static inline int tsc2003_read_vbat2 (struct tsc2003_data *d, enum
+				      tsc2003_pd pd, int *t)
+{
+	return tsc2003_read(d, MEAS_VBAT2, pd, t);
+}
+
+static inline int tsc2003_powerdown (struct tsc2003_data *d)
+{
+	/* we don't have a distinct powerdown command,
+	   so do a benign read with the PD bits cleared */
+	return tsc2003_read(d, MEAS_IN1, PD_POWERDOWN, 0);
+}
+
+void tsc2003_init_client (struct i2c_client *client)
+{
+	struct tsc2003_data *data = i2c_get_clientdata(client);
+
+	data->pd = PD_PENIRQ_DISARM;
+	data->m = M_8BIT;
+	return;
+}
+
+static int tsc2003ts_thread (void *v)
+{
+	struct tsc2003_data *d = v;
+	struct task_struct *tsk = current;
+	int pendown=0;
+
+	d->tstask = tsk;
+
+	daemonize(DRIVER_NAME "tsd");
+	allow_signal(SIGKILL);
+
+	complete(&d->tstask_completion);
+
+	printk(KERN_INFO "%s: address 0x%x\n",
+	       __FUNCTION__, d->client->addr);
+
+	while (!signal_pending(tsk))
+	{
+		unsigned int x, y, p;
+
+		tsc2003_read_xpos(d, PD_PENIRQ_DISARM, &x);
+		tsc2003_read_ypos(d, PD_PENIRQ_DISARM, &y);
+		tsc2003_read_pressure(d, PD_PENIRQ_DISARM, &p);
+
+		/* non-X-Y driver read to avoid glitch in penirq (errata?) */
+		if (p > 100) {
+			pendown = 1;
+			input_report_abs(d->idev, ABS_X, x);
+			input_report_abs(d->idev, ABS_Y, y);
+			input_report_abs(d->idev, ABS_PRESSURE, p);
+			input_report_key(d->idev, BTN_TOUCH, 1);
+			input_sync(d->idev);
+		} else if (pendown == 1) {
+			pendown = 0;
+			input_report_key(d->idev, BTN_TOUCH, 0);
+			input_report_abs(d->idev, ABS_PRESSURE, 0);
+			input_sync(d->idev);
+		}
+		schedule_timeout_interruptible(msecs_to_jiffies(10));
+	}
+
+	d->tstask = NULL;
+	complete_and_exit(&d->tstask_completion, 0);
+}
+
+static int tsc2003_idev_open (struct input_dev *idev)
+{
+	struct tsc2003_data *d = idev->private;
+	int ret = 0;
+
+	if (down_interruptible(&d->sem))
+		return -EINTR;
+
+	if (d->tstask)
+		panic(DRIVER_NAME "tsd already running (!). abort.");
+
+	init_completion(&d->tstask_completion);
+
+	ret = kernel_thread(tsc2003ts_thread, d, CLONE_KERNEL);
+	if (ret >= 0) {
+		wait_for_completion(&d->tstask_completion);
+		ret = 0;
+	}
+
+	up(&d->sem);
+
+	return ret;
+}
+
+static void tsc2003_idev_close (struct input_dev *idev)
+{
+	struct tsc2003_data *d = idev->private;
+	down_interruptible(&d->sem);
+	if (d->tstask)
+	{
+		send_sig(SIGKILL, d->tstask, 1);
+		wait_for_completion(&d->tstask_completion);
+	}
+	up(&d->sem);
+	return;
+}
+
+#if defined(CONFIG_SYSFS) && defined(CONFIG_SENSORS_TSC2003_SYSFS)
+static ssize_t show_addr (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->client.addr);
+}
+static DEVICE_ATTR(addr, S_IRUGO, show_addr, NULL);
+
+static ssize_t show_vbat1 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->vbat1);
+}
+static DEVICE_ATTR(vbat1, S_IRUGO, show_vbat1, NULL);
+
+static ssize_t show_vbat2 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->vbat2);
+}
+static DEVICE_ATTR(vbat2, S_IRUGO, show_vbat2, NULL);
+
+static ssize_t show_in1 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->in1);
+}
+static DEVICE_ATTR(in1, S_IRUGO, show_in1, NULL);
+
+static ssize_t show_in2 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->in2);
+}
+static DEVICE_ATTR(in2, S_IRUGO, show_in2, NULL);
+
+static ssize_t show_temp0 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->temp0);
+}
+static DEVICE_ATTR(temp0, S_IRUGO, show_temp0, NULL);
+
+static ssize_t show_temp1 (struct device *dev, char *buf)
+{
+	struct tsc2003_data *d = container_of(dev->driver, struct
+					      tsc2003_data, driver);
+	return sprintf(buf, "%d\n", d->temp1);
+}
+static DEVICE_ATTR(temp1, S_IRUGO, show_temp1, NULL);
+
+#warning "TODO: this daemon sometimes hangs the touchscreen daemon"
+#warning "TODO: under periods of heavy touch screen activity."
+#warning "TODO: Use with caution until the bug is squashed."
+static int tsc2003s_thread (void *v)
+{
+	struct tsc2003_data *d = v;
+
+	daemonize(DRIVER_NAME "sd");
+	allow_signal(SIGKILL);
+
+	printk(KERN_INFO "%s: address 0x%x\n",
+	       __FUNCTION__, d->client.addr);
+
+	while (!signal_pending(current))
+	{
+		if (!down_interruptible(&d->sem))
+		{
+			if (!timer_pending(&d->penirq_timer))
+			{
+				tsc2003_read_vbat1(d, d->pd, &d->vbat1);
+				tsc2003_read_vbat2(d, d->pd, &d->vbat2);
+				tsc2003_read_in1(d, d->pd, &d->in1);
+				tsc2003_read_in2(d, d->pd, &d->in2);
+				tsc2003_read_temp0(d, d->pd, &d->temp0);
+				tsc2003_read_temp1(d, d->pd, &d->temp1);
+			}
+			up(&d->sem);
+		}
+		set_task_state(current, TASK_INTERRUPTIBLE);
+		schedule_timeout(5 * HZ);
+	}
+	do_exit(0);
+}
+#endif
+
+static int tsc2003_driver_register (struct tsc2003_data *data)
+{
+	int ret = 0;
+
+	init_MUTEX(&data->sem);
+
+	data->idev = input_allocate_device();
+	if(!data->idev)
+	{
+		return -ENOMEM;
+	}
+	data->idev->private = data;
+	data->idev->name = DRIVER_NAME;
+	data->idev->evbit[0] = BIT(EV_ABS);
+	data->idev->open = tsc2003_idev_open;
+	data->idev->close = tsc2003_idev_close;
+	data->idev->absbit[LONG(ABS_X)] = BIT(ABS_X);
+	data->idev->absbit[LONG(ABS_Y)] = BIT(ABS_Y);
+	data->idev->absbit[LONG(ABS_PRESSURE)] = BIT(ABS_PRESSURE);
+	input_set_abs_params(data->idev, ABS_X, 0, ADC_MAX, 0, 0);
+	input_set_abs_params(data->idev, ABS_Y, 0, ADC_MAX, 0, 0);
+
+	ret = input_register_device(data->idev);
+	if(ret)
+	{
+		input_free_device(data->idev);
+		return ret;
+	}
+	return ret;
+}
+
+/* Magic definition of all other variables and things */
+static unsigned short normal_i2c[] = {0x48, I2C_CLIENT_END };
+
+I2C_CLIENT_INSMOD;
+
+static int tsc2003_i2c_attach_adapter(struct i2c_adapter *adapter)
+{
+	return i2c_probe(adapter, &addr_data, tsc2003_i2c_detect);
+}
+
+static int tsc2003_i2c_detach_client(struct i2c_client *client)
+{
+	struct tsc2003_data *data=i2c_get_clientdata(client);
+	int err;
+
+	input_unregister_device(data->idev);
+
+	err = i2c_detach_client(client);
+	if (err) {
+		dev_err(&client->dev, "Client deregistration failed, "
+			"client not detached.\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static struct i2c_driver tsc2003_i2c_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= DRIVER_NAME,
+	},
+	.attach_adapter    = tsc2003_i2c_attach_adapter,
+	.detach_client    = tsc2003_i2c_detach_client,
+	.command              = NULL
+};
+
+static struct i2c_client client_template = {
+	.name =   "TSC2003",
+	.driver = &tsc2003_i2c_driver,
+};
+
+static int tsc2003_i2c_detect (struct i2c_adapter *adap, int addr,
+			       int kind)
+{
+	struct i2c_client *i2c;
+	int ret;
+	struct tsc2003_data *data;
+
+	client_template.adapter = adap;
+	client_template.addr = addr;
+
+	printk(KERN_INFO "tsc2003 i2c touch screen controller\n");
+	printk(KERN_INFO "Bill Gatliff <bgat at billgatliff.com>\n");
+
+	i2c =  kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
+	if (i2c == NULL){
+		return -ENOMEM;
+	}
+
+	data = kcalloc(1, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto err;
+	}
+	data->client = i2c;
+	i2c_set_clientdata(i2c, data);
+
+	ret = i2c_attach_client(i2c);
+
+	if (ret < 0) {
+		printk("failed to attach codec at addr %x\n", addr);
+		goto err;
+	}
+
+	tsc2003_init_client(i2c);
+
+	tsc2003_powerdown(data);
+
+	ret = tsc2003_driver_register(data);
+	if(ret < 0) {
+		printk("driver_register failed\n");
+		goto err;
+	}
+
+	return ret;
+
+err:
+	kfree(i2c);
+	return ret;
+}
+
+#define tsc2003_suspend NULL
+#define tsc2003_resume NULL
+
+static int __devinit tsc2003_probe(struct platform_device *dev)
+{
+	int ret;
+
+	ret=i2c_add_driver(&tsc2003_i2c_driver);
+	if(ret)
+		return ret;
+
+#if defined(CONFIG_SYSFS) && defined(CONFIG_SENSORS_TSC2003_SYSFS)
+	ret = kernel_thread(tsc2003s_thread, d, CLONE_KERNEL);
+	if (ret >= 0)
+		ret = 0;
+
+	device_create_file(dev, &dev_attr_addr);
+	device_create_file(dev, &dev_attr_vbat1);
+	device_create_file(dev, &dev_attr_vbat2);
+	device_create_file(dev, &dev_attr_in1);
+	device_create_file(dev, &dev_attr_in2);
+	device_create_file(dev, &dev_attr_temp0);
+	device_create_file(dev, &dev_attr_temp1);
+#endif
+	return 0;
+}
+
+static int __devexit tsc2003_remove(struct platform_device *dev)
+{
+	i2c_del_driver(&tsc2003_i2c_driver);
+	return 0;
+}
+
+static struct platform_driver tsc2003_driver = {
+	.probe		= tsc2003_probe,
+	.remove		= __devexit_p(tsc2003_remove),
+	.suspend	= tsc2003_suspend,
+	.resume		= tsc2003_resume,
+	.driver		= {
+		.name	= "tsc2003",
+	},
+};
+
+static int __init tsc2003_init(void)
+{
+	return platform_driver_register(&tsc2003_driver);
+}
+
+static void __exit tsc2003_exit(void)
+{
+	platform_driver_unregister(&tsc2003_driver);
+}
+
+MODULE_AUTHOR("Bill Gatliff <bgat at billgatliff.com>");
+MODULE_DESCRIPTION("TSC2003 Touch Screen Controller driver");
+MODULE_LICENSE("GPL");
+
+module_init(tsc2003_init);
+module_exit(tsc2003_exit);
diff --git a/packages/linux/linux_2.6.21.bb b/packages/linux/linux_2.6.21.bb
index 2ef35ef4c0..4d41b33e06 100644
--- a/packages/linux/linux_2.6.21.bb
+++ b/packages/linux/linux_2.6.21.bb
@@ -4,10 +4,12 @@ DEFAULT_PREFERENCE_at91sam9263ek = "-1"
 DEFAULT_PREFERENCE_gumstix-connex = "1"
 DEFAULT_PREFERENCE_gumstix-verdex = "1"
 
-PR = "r9"
+PR = "r10"
 
 SRC_URI = "${KERNELORG_MIRROR}/pub/linux/kernel/v2.6/linux-${PV}.tar.bz2 \
-           file://defconfig \
+           file://tsc2003.c \
+	   file://tsc2003-config.diff;patch=1 \
+	   file://defconfig \
 	   "
 
 SRC_URI_append_simpad = "\
@@ -76,3 +78,8 @@ GUMSTIX_PATCHES = "\
 
 SRC_URI_append_gumstix-verdex = "${GUMSTIX_PATCHES}"
 SRC_URI_append_gumstix-connex = "${GUMSTIX_PATCHES}"
+
+
+do_configure_prepend() {
+        cp ${WORKDIR}/tsc2003.c ${S}/drivers/i2c/chips/
+}