@@ -42,37 +42,36 @@ config TOUCHSCREEN_AD7877
To compile this driver as a module, choose M here: the
module will be called ad7877.
-config TOUCHSCREEN_AD7879_I2C
- tristate "AD7879 based touchscreens: AD7879-1 I2C Interface"
- depends on I2C
- select TOUCHSCREEN_AD7879
+config TOUCHSCREEN_AD7879
+ tristate "Analog Devices AD7879-1/AD7889-1 touchscreen interface"
help
- Say Y here if you have a touchscreen interface using the
- AD7879-1/AD7889-1 controller, and your board-specific
- initialization code includes that in its table of I2C devices.
+ Say Y here if you want to support a touchscreen interface using
+ the AD7879-1/AD7889-1 controller.
- If unsure, say N (but it's safe to say "Y").
+ You should select a bus connection too.
To compile this driver as a module, choose M here: the
module will be called ad7879.
+config TOUCHSCREEN_AD7879_I2C
+ tristate "support I2C bus connection"
+ depends on TOUCHSCREEN_AD7879 && I2C
+ help
+ Say Y here if you have AD7879-1/AD7889-1 hooked to an I2C bus.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad7879-i2c.
+
config TOUCHSCREEN_AD7879_SPI
- tristate "AD7879 based touchscreens: AD7879 SPI Interface"
- depends on SPI_MASTER && TOUCHSCREEN_AD7879_I2C = n
- select TOUCHSCREEN_AD7879
+ tristate "support SPI bus connection"
+ depends on TOUCHSCREEN_AD7879 && SPI_MASTER
help
- Say Y here if you have a touchscreen interface using the
- AD7879/AD7889 controller, and your board-specific initialization
- code includes that in its table of SPI devices.
+ Say Y here if you have AD7879-1/AD7889-1 hooked to a SPI bus.
If unsure, say N (but it's safe to say "Y").
To compile this driver as a module, choose M here: the
- module will be called ad7879.
-
-config TOUCHSCREEN_AD7879
- tristate
- default n
+ module will be called ad7879-spi.
config TOUCHSCREEN_BITSY
tristate "Compaq iPAQ H3600 (Bitsy) touchscreen"
@@ -8,6 +8,8 @@ wm97xx-ts-y := wm97xx-core.o
obj-$(CONFIG_TOUCHSCREEN_AD7877) += ad7877.o
obj-$(CONFIG_TOUCHSCREEN_AD7879) += ad7879.o
+obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C) += ad7879-i2c.o
+obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI) += ad7879-spi.o
obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
new file mode 100644
@@ -0,0 +1,113 @@
+/*
+ * AD7879-1/AD7889-1 touchscreen (I2C bus)
+ *
+ * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/input.h> /* BUS_I2C */
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "ad7879.h"
+
+#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
+
+#ifdef CONFIG_PM
+static int ad7879_i2c_suspend(struct i2c_client *client, pm_message_t message)
+{
+ return ad7879_disable(&client->dev);
+}
+
+static int ad7879_i2c_resume(struct i2c_client *client)
+{
+ return ad7879_enable(&client->dev);
+}
+#else
+# define ad7879_i2c_suspend NULL
+# define ad7879_i2c_resume NULL
+#endif
+
+/* All registers are word-sized.
+ * AD7879 uses a high-byte first convention.
+ */
+static int ad7879_i2c_read(void *client, u8 reg)
+{
+ return swab16(i2c_smbus_read_word_data(client, reg));
+}
+
+static int ad7879_i2c_multi_read(void *client, u8 first_reg, u8 count, u16 *buf)
+{
+ u8 idx;
+ for (idx = 0; idx < count; ++idx)
+ buf[idx] = ad7879_i2c_read(client, first_reg + idx);
+ return 0;
+}
+
+static int ad7879_i2c_write(void *client, u8 reg, u16 val)
+{
+ return i2c_smbus_write_word_data(client, reg, swab16(val));
+}
+
+static int __devinit ad7879_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ad7879_bus_ops bops = {
+ .bus_data = client,
+ .irq = client->irq,
+ .read = ad7879_i2c_read,
+ .multi_read = ad7879_i2c_multi_read,
+ .write = ad7879_i2c_write,
+ };
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_WORD_DATA)) {
+ dev_err(&client->dev, "SMBUS Word Data not Supported\n");
+ return -EIO;
+ }
+
+ return ad7879_probe(&client->dev, &bops, AD7879_DEVID, BUS_I2C);
+}
+
+static int __devexit ad7879_i2c_remove(struct i2c_client *client)
+{
+ return ad7879_remove(&client->dev);
+}
+
+static const struct i2c_device_id ad7879_id[] = {
+ { "ad7879", 0 },
+ { "ad7889", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ad7879_id);
+
+static struct i2c_driver ad7879_i2c_driver = {
+ .driver = {
+ .name = "ad7879",
+ .owner = THIS_MODULE,
+ },
+ .probe = ad7879_i2c_probe,
+ .remove = __devexit_p(ad7879_i2c_remove),
+ .suspend = ad7879_i2c_suspend,
+ .resume = ad7879_i2c_resume,
+ .id_table = ad7879_id,
+};
+
+static int __init ad7879_i2c_init(void)
+{
+ return i2c_add_driver(&ad7879_i2c_driver);
+}
+module_init(ad7879_i2c_init);
+
+static void __exit ad7879_i2c_exit(void)
+{
+ i2c_del_driver(&ad7879_i2c_driver);
+}
+module_exit(ad7879_i2c_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("i2c:ad7879");
new file mode 100644
@@ -0,0 +1,162 @@
+/*
+ * AD7879/AD7889 touchscreen (SPI bus)
+ *
+ * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/input.h> /* BUS_SPI */
+#include <linux/spi/spi.h>
+
+#include "ad7879.h"
+
+#define AD7879_DEVID 0x7A /* AD7879/AD7889 */
+
+#define MAX_SPI_FREQ_HZ 5000000
+#define AD7879_CMD_MAGIC 0xE000
+#define AD7879_CMD_READ (1 << 10)
+#define AD7879_CMD(reg) (AD7879_CMD_MAGIC | ((reg) & 0xF))
+#define AD7879_WRITECMD(reg) (AD7879_CMD(reg))
+#define AD7879_READCMD(reg) (AD7879_CMD(reg) | AD7879_CMD_READ)
+
+#ifdef CONFIG_PM
+static int ad7879_spi_suspend(struct spi_device *spi, pm_message_t message)
+{
+ return ad7879_disable(&spi->dev);
+}
+
+static int ad7879_spi_resume(struct spi_device *spi)
+{
+ return ad7879_enable(&spi->dev);
+}
+#else
+# define ad7879_spi_suspend NULL
+# define ad7879_spi_resume NULL
+#endif
+
+/*
+ * ad7879_read/write are only used for initial setup and for sysfs controls.
+ * The main traffic is done in ad7879_collect().
+ */
+
+static int ad7879_spi_xfer(void *spi, u16 cmd, u8 count, u16 *tx_buf, u16 *rx_buf)
+{
+ struct spi_message msg;
+ struct spi_transfer *xfers;
+ void *spi_data;
+ u16 *command;
+ u16 *_rx_buf = _rx_buf; /* shut gcc up */
+ u8 idx;
+ int ret;
+
+ xfers = spi_data = kzalloc(sizeof(*xfers) * (count + 2), GFP_KERNEL);
+ if (!spi_data)
+ return -ENOMEM;
+
+ spi_message_init(&msg);
+
+ command = spi_data;
+ command[0] = cmd;
+ if (count == 1) {
+ /* ad7879_spi_{read,write} gave us buf on stack */
+ command[1] = *tx_buf;
+ tx_buf = &command[1];
+ _rx_buf = rx_buf;
+ rx_buf = &command[2];
+ }
+
+ ++xfers;
+ xfers[0].tx_buf = command;
+ xfers[0].len = 2;
+ spi_message_add_tail(&xfers[0], &msg);
+ ++xfers;
+
+ for (idx = 0; idx < count; ++idx) {
+ if (rx_buf)
+ xfers[idx].rx_buf = &rx_buf[idx];
+ if (tx_buf)
+ xfers[idx].tx_buf = &tx_buf[idx];
+ xfers[idx].len = 2;
+ spi_message_add_tail(&xfers[idx], &msg);
+ }
+
+ ret = spi_sync(spi, &msg);
+
+ if (count == 1)
+ _rx_buf[0] = command[2];
+
+ kfree(spi_data);
+
+ return ret;
+}
+
+static int ad7879_spi_multi_read(void *spi, u8 first_reg, u8 count, u16 *buf)
+{
+ return ad7879_spi_xfer(spi, AD7879_READCMD(first_reg), count, NULL, buf);
+}
+
+static int ad7879_spi_read(void *spi, u8 reg)
+{
+ u16 ret, dummy;
+ return ad7879_spi_xfer(spi, AD7879_READCMD(reg), 1, &dummy, &ret) ? : ret;
+}
+
+static int ad7879_spi_write(void *spi, u8 reg, u16 val)
+{
+ u16 dummy;
+ return ad7879_spi_xfer(spi, AD7879_WRITECMD(reg), 1, &val, &dummy);
+}
+
+static int __devinit ad7879_spi_probe(struct spi_device *spi)
+{
+ struct ad7879_bus_ops bops = {
+ .bus_data = spi,
+ .irq = spi->irq,
+ .read = ad7879_spi_read,
+ .multi_read = ad7879_spi_multi_read,
+ .write = ad7879_spi_write,
+ };
+
+ /* don't exceed max specified SPI CLK frequency */
+ if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
+ dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz);
+ return -EINVAL;
+ }
+
+ return ad7879_probe(&spi->dev, &bops, AD7879_DEVID, BUS_SPI);
+}
+
+static int __devexit ad7879_spi_remove(struct spi_device *spi)
+{
+ return ad7879_remove(&spi->dev);
+}
+
+static struct spi_driver ad7879_spi_driver = {
+ .driver = {
+ .name = "ad7879",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = ad7879_spi_probe,
+ .remove = __devexit_p(ad7879_spi_remove),
+ .suspend = ad7879_spi_suspend,
+ .resume = ad7879_spi_resume,
+};
+
+static int __init ad7879_spi_init(void)
+{
+ return spi_register_driver(&ad7879_spi_driver);
+}
+module_init(ad7879_spi_init);
+
+static void __exit ad7879_spi_exit(void)
+{
+ spi_unregister_driver(&ad7879_spi_driver);
+}
+module_exit(ad7879_spi_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("AD7879(-1) touchscreen SPI bus driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:ad7879");
@@ -1,25 +1,9 @@
/*
- * Copyright (C) 2008-2009 Michael Hennerich, Analog Devices Inc.
+ * AD7879/AD7889 based touchscreen and GPIO driver
*
- * Description: AD7879/AD7889 based touchscreen, and GPIO driver
- * (I2C/SPI Interface)
+ * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
*
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * 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, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under the GPL-2 or later.
*
* History:
* Copyright (c) 2005 David Brownell
@@ -45,11 +29,10 @@
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
-#include <linux/spi/spi.h>
-#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/spi/ad7879.h>
+#include "ad7879.h"
#define AD7879_REG_ZEROS 0
#define AD7879_REG_CTRL1 1
@@ -120,16 +103,8 @@ enum {
#define MAX_12BIT ((1<<12)-1)
#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50)
-#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE)
-#define AD7879_DEVID 0x7A
-typedef struct spi_device bus_device;
-#elif defined(CONFIG_TOUCHSCREEN_AD7879_I2C) || defined(CONFIG_TOUCHSCREEN_AD7879_I2C_MODULE)
-#define AD7879_DEVID 0x79
-typedef struct i2c_client bus_device;
-#endif
-
struct ad7879 {
- bus_device *bus;
+ struct ad7879_bus_ops bops;
struct input_dev *input;
struct work_struct work;
struct timer_list timer;
@@ -138,12 +113,6 @@ struct ad7879 {
#endif
struct mutex mutex;
unsigned disabled:1; /* P: mutex */
-
-#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE)
- struct spi_message msg;
- struct spi_transfer xfer[AD7879_NR_SENSE + 1];
- u16 cmd;
-#endif
u16 conversion_data[AD7879_NR_SENSE];
char phys[32];
u8 first_conversion_delay;
@@ -158,9 +127,18 @@ struct ad7879 {
u16 cmd_crtl3;
};
-static int ad7879_read(bus_device *, u8);
-static int ad7879_write(bus_device *, u8, u16);
-static void ad7879_collect(struct ad7879 *);
+static int ad7879_read(struct ad7879 *ts, u8 reg)
+{
+ return ts->bops.read(ts->bops.bus_data, reg);
+}
+static int ad7879_multi_read(struct ad7879 *ts, u8 first_reg, u8 count, u16 *buf)
+{
+ return ts->bops.multi_read(ts->bops.bus_data, first_reg, count, buf);
+}
+static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val)
+{
+ return ts->bops.write(ts->bops.bus_data, reg, val);
+}
static void ad7879_report(struct ad7879 *ts)
{
@@ -201,7 +179,7 @@ static void ad7879_work(struct work_struct *work)
struct ad7879 *ts = container_of(work, struct ad7879, work);
/* use keventd context to read the result registers */
- ad7879_collect(ts);
+ ad7879_multi_read(ts, AD7879_REG_XPLUS, AD7879_NR_SENSE, ts->conversion_data);
ad7879_report(ts);
mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
}
@@ -238,44 +216,54 @@ static irqreturn_t ad7879_irq(int irq, void *handle)
static void ad7879_setup(struct ad7879 *ts)
{
- ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
- ad7879_write(ts->bus, AD7879_REG_CTRL3, ts->cmd_crtl3);
- ad7879_write(ts->bus, AD7879_REG_CTRL1, ts->cmd_crtl1);
+ ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
+ ad7879_write(ts, AD7879_REG_CTRL3, ts->cmd_crtl3);
+ ad7879_write(ts, AD7879_REG_CTRL1, ts->cmd_crtl1);
}
-static void ad7879_disable(struct ad7879 *ts)
+int ad7879_disable(struct device *dev)
{
+ struct ad7879 *ts = dev_get_drvdata(dev);
+
mutex_lock(&ts->mutex);
if (!ts->disabled) {
ts->disabled = 1;
- disable_irq(ts->bus->irq);
+ disable_irq(ts->bops.irq);
cancel_work_sync(&ts->work);
if (del_timer_sync(&ts->timer))
ad7879_ts_event_release(ts);
- ad7879_write(ts->bus, AD7879_REG_CTRL2,
+ ad7879_write(ts, AD7879_REG_CTRL2,
AD7879_PM(AD7879_PM_SHUTDOWN));
}
mutex_unlock(&ts->mutex);
+
+ return 0;
}
+EXPORT_SYMBOL(ad7879_disable);
-static void ad7879_enable(struct ad7879 *ts)
+int ad7879_enable(struct device *dev)
{
+ struct ad7879 *ts = dev_get_drvdata(dev);
+
mutex_lock(&ts->mutex);
if (ts->disabled) {
ad7879_setup(ts);
ts->disabled = 0;
- enable_irq(ts->bus->irq);
+ enable_irq(ts->bops.irq);
}
mutex_unlock(&ts->mutex);
+
+ return 0;
}
+EXPORT_SYMBOL(ad7879_enable);
static ssize_t ad7879_disable_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -289,7 +277,6 @@ static ssize_t ad7879_disable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ad7879 *ts = dev_get_drvdata(dev);
unsigned long val;
int error;
@@ -298,9 +285,9 @@ static ssize_t ad7879_disable_store(struct device *dev,
return error;
if (val)
- ad7879_disable(ts);
+ ad7879_disable(dev);
else
- ad7879_enable(ts);
+ ad7879_enable(dev);
return count;
}
@@ -324,7 +311,7 @@ int ad7879_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
mutex_lock(&ts->mutex);
ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL;
- err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+ err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
return err;
@@ -343,7 +330,7 @@ int ad7879_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int leve
else
ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
- err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+ err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
return err;
@@ -355,7 +342,7 @@ int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
u16 val;
mutex_lock(&ts->mutex);
- val = ad7879_read(ts->bus, AD7879_REG_CTRL2);
+ val = ad7879_read(ts, AD7879_REG_CTRL2);
mutex_unlock(&ts->mutex);
return !!(val & AD7879_GPIO_DATA);
@@ -371,7 +358,7 @@ void ad7879_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
else
ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
- ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+ ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
}
@@ -429,28 +416,38 @@ static inline int ad7879_gpio_remove(struct device *dev)
}
#endif
-static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
+__devinit int
+ad7879_probe(struct device *dev, struct ad7879_bus_ops *bops, u8 devid, u16 bustype)
{
struct input_dev *input_dev;
- struct ad7879_platform_data *pdata = bus->dev.platform_data;
+ struct ad7879_platform_data *pdata = dev->platform_data;
int err;
u16 revid;
+ struct ad7879 *ts;
- if (!bus->irq) {
- dev_err(&bus->dev, "no IRQ?\n");
+ if (!bops->irq) {
+ dev_err(dev, "no IRQ?\n");
return -ENODEV;
}
if (!pdata) {
- dev_err(&bus->dev, "no platform data?\n");
+ dev_err(dev, "no platform data?\n");
return -ENODEV;
}
+ err = -ENOMEM;
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ goto err_free_ts_mem;
+
input_dev = input_allocate_device();
if (!input_dev)
- return -ENOMEM;
+ goto err_free_ts_mem;
+ ts->bops = *bops;
ts->input = input_dev;
+ dev_set_drvdata(dev, ts);
setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts);
INIT_WORK(&ts->work, ad7879_work);
@@ -465,11 +462,12 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
ts->median = pdata->median;
- snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&bus->dev));
+ snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
input_dev->name = "AD7879 Touchscreen";
input_dev->phys = ts->phys;
- input_dev->dev.parent = &bus->dev;
+ input_dev->dev.parent = dev;
+ input_dev->id.bustype = bustype;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(ABS_X, input_dev->absbit);
@@ -487,17 +485,19 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
input_set_abs_params(input_dev, ABS_PRESSURE,
pdata->pressure_min, pdata->pressure_max, 0, 0);
- err = ad7879_write(bus, AD7879_REG_CTRL2, AD7879_RESET);
+ err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET);
if (err < 0) {
- dev_err(&bus->dev, "Failed to write %s\n", input_dev->name);
+ dev_err(dev, "Failed to write %s\n", input_dev->name);
goto err_free_mem;
}
- revid = ad7879_read(bus, AD7879_REG_REVID);
-
- if ((revid & 0xFF) != AD7879_DEVID) {
- dev_err(&bus->dev, "Failed to probe %s\n", input_dev->name);
+ revid = ad7879_read(ts, AD7879_REG_REVID);
+ input_dev->id.product = (revid & 0xff);
+ input_dev->id.version = revid >> 8;
+ if (input_dev->id.product != devid) {
+ dev_err(dev, "Failed to probe %s (%x vs %x)\n",
+ input_dev->name, devid, revid);
err = -ENODEV;
goto err_free_mem;
}
@@ -521,19 +521,18 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
ad7879_setup(ts);
- err = request_irq(bus->irq, ad7879_irq,
- IRQF_TRIGGER_FALLING, bus->dev.driver->name, ts);
-
+ err = request_irq(ts->bops.irq, ad7879_irq, IRQF_TRIGGER_FALLING,
+ dev_name(dev), ts);
if (err) {
- dev_err(&bus->dev, "irq %d busy?\n", bus->irq);
+ dev_err(dev, "irq %d busy?\n", ts->bops.irq);
goto err_free_mem;
}
- err = sysfs_create_group(&bus->dev.kobj, &ad7879_attr_group);
+ err = sysfs_create_group(&dev->kobj, &ad7879_attr_group);
if (err)
goto err_free_irq;
- err = ad7879_gpio_add(&bus->dev);
+ err = ad7879_gpio_add(dev);
if (err)
goto err_remove_attr;
@@ -541,324 +540,45 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
if (err)
goto err_remove_gpio;
- dev_info(&bus->dev, "Rev.%d touchscreen, irq %d\n",
- revid >> 8, bus->irq);
+ dev_info(dev, "Rev.%d touchscreen, irq %d\n",
+ revid >> 8, ts->bops.irq);
return 0;
err_remove_gpio:
- ad7879_gpio_remove(&bus->dev);
+ ad7879_gpio_remove(dev);
err_remove_attr:
- sysfs_remove_group(&bus->dev.kobj, &ad7879_attr_group);
+ sysfs_remove_group(&dev->kobj, &ad7879_attr_group);
err_free_irq:
- free_irq(bus->irq, ts);
+ free_irq(ts->bops.irq, ts);
err_free_mem:
input_free_device(input_dev);
+err_free_ts_mem:
+ kfree(ts);
+ dev_set_drvdata(dev, NULL);
return err;
}
+EXPORT_SYMBOL(ad7879_probe);
-static int __devexit ad7879_destroy(bus_device *bus, struct ad7879 *ts)
-{
- ad7879_gpio_remove(&bus->dev);
- ad7879_disable(ts);
- sysfs_remove_group(&ts->bus->dev.kobj, &ad7879_attr_group);
- free_irq(ts->bus->irq, ts);
- input_unregister_device(ts->input);
- dev_dbg(&bus->dev, "unregistered touchscreen\n");
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int ad7879_suspend(bus_device *bus, pm_message_t message)
-{
- struct ad7879 *ts = dev_get_drvdata(&bus->dev);
-
- ad7879_disable(ts);
-
- return 0;
-}
-
-static int ad7879_resume(bus_device *bus)
-{
- struct ad7879 *ts = dev_get_drvdata(&bus->dev);
-
- ad7879_enable(ts);
-
- return 0;
-}
-#else
-#define ad7879_suspend NULL
-#define ad7879_resume NULL
-#endif
-
-#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE)
-#define MAX_SPI_FREQ_HZ 5000000
-#define AD7879_CMD_MAGIC 0xE000
-#define AD7879_CMD_READ (1 << 10)
-#define AD7879_WRITECMD(reg) (AD7879_CMD_MAGIC | (reg & 0xF))
-#define AD7879_READCMD(reg) (AD7879_CMD_MAGIC | AD7879_CMD_READ | (reg & 0xF))
-
-struct ser_req {
- u16 command;
- u16 data;
- struct spi_message msg;
- struct spi_transfer xfer[2];
-};
-
-/*
- * ad7879_read/write are only used for initial setup and for sysfs controls.
- * The main traffic is done in ad7879_collect().
- */
-
-static int ad7879_read(struct spi_device *spi, u8 reg)
-{
- struct ser_req *req;
- int status, ret;
-
- req = kzalloc(sizeof *req, GFP_KERNEL);
- if (!req)
- return -ENOMEM;
-
- spi_message_init(&req->msg);
-
- req->command = (u16) AD7879_READCMD(reg);
- req->xfer[0].tx_buf = &req->command;
- req->xfer[0].len = 2;
-
- req->xfer[1].rx_buf = &req->data;
- req->xfer[1].len = 2;
-
- spi_message_add_tail(&req->xfer[0], &req->msg);
- spi_message_add_tail(&req->xfer[1], &req->msg);
-
- status = spi_sync(spi, &req->msg);
- ret = status ? : req->data;
-
- kfree(req);
-
- return ret;
-}
-
-static int ad7879_write(struct spi_device *spi, u8 reg, u16 val)
-{
- struct ser_req *req;
- int status;
-
- req = kzalloc(sizeof *req, GFP_KERNEL);
- if (!req)
- return -ENOMEM;
-
- spi_message_init(&req->msg);
-
- req->command = (u16) AD7879_WRITECMD(reg);
- req->xfer[0].tx_buf = &req->command;
- req->xfer[0].len = 2;
-
- req->data = val;
- req->xfer[1].tx_buf = &req->data;
- req->xfer[1].len = 2;
-
- spi_message_add_tail(&req->xfer[0], &req->msg);
- spi_message_add_tail(&req->xfer[1], &req->msg);
-
- status = spi_sync(spi, &req->msg);
-
- kfree(req);
-
- return status;
-}
-
-static void ad7879_collect(struct ad7879 *ts)
+__devexit int ad7879_remove(struct device *dev)
{
- int status = spi_sync(ts->bus, &ts->msg);
-
- if (status)
- dev_err(&ts->bus->dev, "spi_sync --> %d\n", status);
-}
-
-static void ad7879_setup_ts_def_msg(struct ad7879 *ts)
-{
- struct spi_message *m;
- int i;
-
- ts->cmd = (u16) AD7879_READCMD(AD7879_REG_XPLUS);
-
- m = &ts->msg;
- spi_message_init(m);
- ts->xfer[0].tx_buf = &ts->cmd;
- ts->xfer[0].len = 2;
-
- spi_message_add_tail(&ts->xfer[0], m);
-
- for (i = 0; i < AD7879_NR_SENSE; i++) {
- ts->xfer[i + 1].rx_buf = &ts->conversion_data[i];
- ts->xfer[i + 1].len = 2;
- spi_message_add_tail(&ts->xfer[i + 1], m);
- }
-}
-
-static int __devinit ad7879_probe(struct spi_device *spi)
-{
- struct ad7879 *ts;
- int error;
-
- /* don't exceed max specified SPI CLK frequency */
- if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
- dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz);
- return -EINVAL;
- }
-
- ts = kzalloc(sizeof(struct ad7879), GFP_KERNEL);
- if (!ts)
- return -ENOMEM;
-
- dev_set_drvdata(&spi->dev, ts);
- ts->bus = spi;
-
- ad7879_setup_ts_def_msg(ts);
-
- error = ad7879_construct(spi, ts);
- if (error) {
- dev_set_drvdata(&spi->dev, NULL);
- kfree(ts);
- }
-
- return error;
-}
-
-static int __devexit ad7879_remove(struct spi_device *spi)
-{
- struct ad7879 *ts = dev_get_drvdata(&spi->dev);
+ struct ad7879 *ts = dev_get_drvdata(dev);
- ad7879_destroy(spi, ts);
- dev_set_drvdata(&spi->dev, NULL);
+ ad7879_gpio_remove(dev);
+ ad7879_disable(dev);
+ sysfs_remove_group(&dev->kobj, &ad7879_attr_group);
+ free_irq(ts->bops.irq, ts);
+ input_unregister_device(ts->input);
+ dev_set_drvdata(dev, NULL);
kfree(ts);
- return 0;
-}
-
-static struct spi_driver ad7879_driver = {
- .driver = {
- .name = "ad7879",
- .bus = &spi_bus_type,
- .owner = THIS_MODULE,
- },
- .probe = ad7879_probe,
- .remove = __devexit_p(ad7879_remove),
- .suspend = ad7879_suspend,
- .resume = ad7879_resume,
-};
-
-static int __init ad7879_init(void)
-{
- return spi_register_driver(&ad7879_driver);
-}
-module_init(ad7879_init);
-
-static void __exit ad7879_exit(void)
-{
- spi_unregister_driver(&ad7879_driver);
-}
-module_exit(ad7879_exit);
-
-#elif defined(CONFIG_TOUCHSCREEN_AD7879_I2C) || defined(CONFIG_TOUCHSCREEN_AD7879_I2C_MODULE)
-
-/* All registers are word-sized.
- * AD7879 uses a high-byte first convention.
- */
-static int ad7879_read(struct i2c_client *client, u8 reg)
-{
- return swab16(i2c_smbus_read_word_data(client, reg));
-}
-
-static int ad7879_write(struct i2c_client *client, u8 reg, u16 val)
-{
- return i2c_smbus_write_word_data(client, reg, swab16(val));
-}
-
-static void ad7879_collect(struct ad7879 *ts)
-{
- int i;
-
- for (i = 0; i < AD7879_NR_SENSE; i++)
- ts->conversion_data[i] = ad7879_read(ts->bus,
- AD7879_REG_XPLUS + i);
-}
-
-static int __devinit ad7879_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct ad7879 *ts;
- int error;
-
- if (!i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_WORD_DATA)) {
- dev_err(&client->dev, "SMBUS Word Data not Supported\n");
- return -EIO;
- }
-
- ts = kzalloc(sizeof(struct ad7879), GFP_KERNEL);
- if (!ts)
- return -ENOMEM;
-
- i2c_set_clientdata(client, ts);
- ts->bus = client;
-
- error = ad7879_construct(client, ts);
- if (error) {
- i2c_set_clientdata(client, NULL);
- kfree(ts);
- }
-
- return error;
-}
-
-static int __devexit ad7879_remove(struct i2c_client *client)
-{
- struct ad7879 *ts = dev_get_drvdata(&client->dev);
-
- ad7879_destroy(client, ts);
- i2c_set_clientdata(client, NULL);
- kfree(ts);
+ dev_dbg(dev, "unregistered touchscreen\n");
return 0;
}
-
-static const struct i2c_device_id ad7879_id[] = {
- { "ad7879", 0 },
- { "ad7889", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, ad7879_id);
-
-static struct i2c_driver ad7879_driver = {
- .driver = {
- .name = "ad7879",
- .owner = THIS_MODULE,
- },
- .probe = ad7879_probe,
- .remove = __devexit_p(ad7879_remove),
- .suspend = ad7879_suspend,
- .resume = ad7879_resume,
- .id_table = ad7879_id,
-};
-
-static int __init ad7879_init(void)
-{
- return i2c_add_driver(&ad7879_driver);
-}
-module_init(ad7879_init);
-
-static void __exit ad7879_exit(void)
-{
- i2c_del_driver(&ad7879_driver);
-}
-module_exit(ad7879_exit);
-#endif
+EXPORT_SYMBOL(ad7879_remove);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen Driver");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("spi:ad7879");
new file mode 100644
@@ -0,0 +1,33 @@
+/*
+ * AD7879/AD7889 touchscreen (bus interfaces)
+ *
+ * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _AD7879_H_
+#define _AD7879_H_
+
+#include <linux/types.h>
+
+struct ad7879;
+
+typedef int (ad7879_read_t) (void *bus_data, u8 reg);
+typedef int (ad7879_multi_read_t) (void *bus_data, u8 first_reg, u8 count, u16 *buf);
+typedef int (ad7879_write_t) (void *bus_data, u8 reg, u16 val);
+
+struct ad7879_bus_ops {
+ void *bus_data;
+ int irq;
+ ad7879_read_t *read;
+ ad7879_multi_read_t *multi_read;
+ ad7879_write_t *write;
+};
+
+int ad7879_disable(struct device *dev);
+int ad7879_enable(struct device *dev);
+int ad7879_probe(struct device *dev, struct ad7879_bus_ops *bops, u8 devid, u16 bustype);
+int ad7879_remove(struct device *dev);
+
+#endif