This driver add support for DA9052 4-wire resistive ADC interfaced touchscreen controller.
DA9052 is a MFD therefore this driver depends on DA9052 core driver for core functionalities.
Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com --- Changes since v3: - Remove unrequire type cast - Prefix init code with _devinit - Remove check for workqueue reschedule - tsi_close() to wait for datardy intr completion - Remove seperate workqueue - Move cancel_work_sync to tsi_close() - Check for drv data before tsi priv data allocation Changes since v2: - Replace kthreads with workqueue - Remove kfifos - Taken care for bus type - Replace da9052_set/clear function with da9052_reg_update - Add open and close functionality --- drivers/input/touchscreen/Kconfig | 7 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/da9052_tsi.c | 369 ++++++++++++++++++++++++++++++++ 3 files changed, 377 insertions(+), 0 deletions(-) create mode 100755 drivers/input/touchscreen/da9052_tsi.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index cabd9e5..a5d2e7b 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -144,6 +144,13 @@ 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 TSI" + depends on PMIC_DA9052 + help + Say y here to support the touchscreen found on + Dialog Semiconductor DA9052 PMIC + config TOUCHSCREEN_DYNAPRO tristate "Dynapro serial touchscreen" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 282d6f7..a4aeb25 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o obj-$(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 100755 index 0000000..0897340 --- /dev/null +++ b/drivers/input/touchscreen/da9052_tsi.c @@ -0,0 +1,369 @@ +/* + * TSI driver for Dialog DA9052 + * + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen dchen@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/mfd/da9052/reg.h> +#include <linux/mfd/da9052/da9052.h> + +#define TSI_PEN_DOWN_STATUS 0x40 + +struct da9052_tsi_reg { + u16 x; + u16 y; + u16 z; +}; + +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; + struct da9052 *da9052 = tsi->da9052; + int ret; + + /* Mask PEN_DOWN event and unmask TSI_READY event */ + da9052->events_mask |= DA9052_E_PEN_DOWN; + da9052->events_mask &= ~DA9052_E_TSI_READY; + ret = da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0x80, 0x40); + if (ret < 0) + return IRQ_NONE; + + da9052_ts_start(tsi); + + input_report_key(tsi->dev, BTN_TOUCH, 1); + input_sync(tsi->dev); + + return IRQ_HANDLED; +} + +static int da9052_ts_read(struct da9052_tsi *tsi) +{ + struct da9052_tsi_reg co_ord = {0, 0, 0}; + int ret; + uint8_t _x, _y, _z, _v; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG); + if (ret < 0) + return ret; + + _x = (uint8_t) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG); + if (ret < 0) + return ret; + + _y = (uint8_t) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG); + if (ret < 0) + return ret; + + _z = (uint8_t) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG); + if (ret < 0) + return ret; + + _v = (uint8_t) ret; + + co_ord.x = ((_x << 2) & 0x3fc) | (_v & 0x3); + co_ord.y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2); + co_ord.z = ((_z << 2) & 0x3fc) | ((_v & 0x30) >> 4); + + input_report_abs(tsi->dev, ABS_X, co_ord.x); + input_report_abs(tsi->dev, ABS_Y, co_ord.y); + input_report_abs(tsi->dev, ABS_PRESSURE, co_ord.z); + input_report_key(tsi->dev, BTN_TOUCH, 1); + input_sync(tsi->dev); + + return 0; +} + +static irqreturn_t da9052_ts_datardy_irq(int irq, void *data) +{ + struct da9052_tsi *tsi = data; + + da9052_ts_read(tsi); + schedule_delayed_work(&tsi->ts_pen_work, HZ/50); + 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; + struct da9052 *da9052 = tsi->da9052; + 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); + + /* Unmask PEN_DOWN event */ + da9052->events_mask &= ~DA9052_E_PEN_DOWN; + da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0x40, 0); + + /* 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; + struct da9052 *da9052 = tsi->da9052; + + 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 TSI_READY event */ + da9052->events_mask |= DA9052_E_TSI_READY; + ret = da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0, 0x80); + if (ret < 0) + return ret; + + /*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); + + /* 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); + + 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 = kzalloc(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->id.bustype = tsi->da9052->bustype; + 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); + __set_bit(ABS_X, input_dev->absbit); + __set_bit(ABS_Y, input_dev->absbit); + __set_bit(ABS_PRESSURE, input_dev->absbit); + + 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + tsi->irq_datardy, tsi); +err_pendwn_irq: + free_irq(tsi->da9052->irq_base + tsi->irq_pendwn, tsi); +err_input: + input_free_device(input_dev); +err_mem: + kfree(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->da9052->irq_base + tsi->irq_pendwn, tsi); + free_irq(tsi->da9052->irq_base + tsi->irq_datardy, tsi); + + input_unregister_device(tsi->dev); + + platform_set_drvdata(pdev, NULL); + + kfree(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, + }, +}; + +static int __init da9052_ts_init(void) +{ + return platform_driver_register(&da9052_tsi_driver); +} +module_init(da9052_ts_init); + +static void __exit da9052_ts_exit(void) +{ + platform_driver_unregister(&da9052_tsi_driver); +} +module_exit(da9052_ts_exit); + +MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052"); +MODULE_AUTHOR("David Dajun Chen dchen@diasemi.com"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-tsi");
Hi Ashish,
On Mon, Sep 19, 2011 at 05:52:12PM +0530, ashishj3 wrote:
This driver add support for DA9052 4-wire resistive ADC interfaced touchscreen controller.
DA9052 is a MFD therefore this driver depends on DA9052 core driver for core functionalities.
Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com
Changes since v3:
- Remove unrequire type cast
- Prefix init code with _devinit
- Remove check for workqueue reschedule
- tsi_close() to wait for datardy intr completion
- Remove seperate workqueue
- Move cancel_work_sync to tsi_close()
- Check for drv data before tsi priv data allocation
Changes since v2:
- Replace kthreads with workqueue
- Remove kfifos
- Taken care for bus type
- Replace da9052_set/clear function with da9052_reg_update
- Add open and close functionality
Thank you very mcuh for making changes. I have a few more comments, when they are addressed please feel free to merge this driver with
Acked-by: Dmitry Torokhov dtor@mail.ru
with the rest of da9052 functionality (I assume it will be through MFD tree, right?).
drivers/input/touchscreen/Kconfig | 7 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/da9052_tsi.c | 369 ++++++++++++++++++++++++++++++++ 3 files changed, 377 insertions(+), 0 deletions(-) create mode 100755 drivers/input/touchscreen/da9052_tsi.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index cabd9e5..a5d2e7b 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -144,6 +144,13 @@ 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 TSI"
- depends on PMIC_DA9052
- help
Say y here to support the touchscreen found onDialog Semiconductor DA9052 PMIC
"To compile this driver as a module..."
config TOUCHSCREEN_DYNAPRO tristate "Dynapro serial touchscreen" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 282d6f7..a4aeb25 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o obj-$(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 100755 index 0000000..0897340 --- /dev/null +++ b/drivers/input/touchscreen/da9052_tsi.c @@ -0,0 +1,369 @@ +/*
- TSI driver for Dialog DA9052
- Copyright(c) 2011 Dialog Semiconductor Ltd.
- Author: David Dajun Chen dchen@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/mfd/da9052/reg.h> +#include <linux/mfd/da9052/da9052.h>
+#define TSI_PEN_DOWN_STATUS 0x40
+struct da9052_tsi_reg {
- u16 x;
- u16 y;
- u16 z;
+};
This does not seem to be actually needed. In da9052_ts_read() simply use x, y, z and a temp for register reads.
+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;
- struct da9052 *da9052 = tsi->da9052;
- int ret;
- /* Mask PEN_DOWN event and unmask TSI_READY event */
- da9052->events_mask |= DA9052_E_PEN_DOWN;
- da9052->events_mask &= ~DA9052_E_TSI_READY;
- ret = da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0x80, 0x40);
- if (ret < 0)
return IRQ_NONE;- da9052_ts_start(tsi);
- input_report_key(tsi->dev, BTN_TOUCH, 1);
- input_sync(tsi->dev);
The penup workqueue should be started from here so that if data ready IRQ never arrives for some reason the driver will not be stuck.
- return IRQ_HANDLED;
+}
+static int da9052_ts_read(struct da9052_tsi *tsi) +{
- struct da9052_tsi_reg co_ord = {0, 0, 0};
- int ret;
- uint8_t _x, _y, _z, _v;
- ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
- if (ret < 0)
return ret;- _x = (uint8_t) ret;
- ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
- if (ret < 0)
return ret;- _y = (uint8_t) ret;
- ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
- if (ret < 0)
return ret;- _z = (uint8_t) ret;
- ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
- if (ret < 0)
return ret;- _v = (uint8_t) ret;
- co_ord.x = ((_x << 2) & 0x3fc) | (_v & 0x3);
- co_ord.y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2);
- co_ord.z = ((_z << 2) & 0x3fc) | ((_v & 0x30) >> 4);
- input_report_abs(tsi->dev, ABS_X, co_ord.x);
- input_report_abs(tsi->dev, ABS_Y, co_ord.y);
- input_report_abs(tsi->dev, ABS_PRESSURE, co_ord.z);
- input_report_key(tsi->dev, BTN_TOUCH, 1);
- input_sync(tsi->dev);
- return 0;
+}
+static irqreturn_t da9052_ts_datardy_irq(int irq, void *data) +{
- struct da9052_tsi *tsi = data;
- da9052_ts_read(tsi);
- schedule_delayed_work(&tsi->ts_pen_work, HZ/50);
- 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;
- struct da9052 *da9052 = tsi->da9052;
- int ret;
- ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
I assume da9052_reg_read() has enough locking so it does not race with data ready IRQ.
- 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);/* Unmask PEN_DOWN event */da9052->events_mask &= ~DA9052_E_PEN_DOWN;
Should you also mask data ready IRQ here?
da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0x40, 0);/* 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;
- struct da9052 *da9052 = tsi->da9052;
- 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 TSI_READY event */
- da9052->events_mask |= DA9052_E_TSI_READY;
- ret = da9052_reg_update(da9052, DA9052_IRQ_MASK_B_REG, 0, 0x80);
- if (ret < 0)
return ret;- /*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);
- /* 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);
Disable IRQs here to make sure you do not resubmit workqueue.
- 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);
and reenable them here.
+}
+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 = kzalloc(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->id.bustype = tsi->da9052->bustype;
- 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);
- __set_bit(ABS_X, input_dev->absbit);
- __set_bit(ABS_Y, input_dev->absbit);
- __set_bit(ABS_PRESSURE, input_dev->absbit);
input_set_abs_params() takes care of setting event bits so strictly speaking the last 3 lines are not needed.
- 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + 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->da9052->irq_base + tsi->irq_datardy, tsi);
+err_pendwn_irq:
- free_irq(tsi->da9052->irq_base + tsi->irq_pendwn, tsi);
+err_input:
- input_free_device(input_dev);
+err_mem:
- kfree(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->da9052->irq_base + tsi->irq_pendwn, tsi);
- free_irq(tsi->da9052->irq_base + tsi->irq_datardy, tsi);
- input_unregister_device(tsi->dev);
- platform_set_drvdata(pdev, NULL);
- kfree(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,- },
+};
+static int __init da9052_ts_init(void) +{
- return platform_driver_register(&da9052_tsi_driver);
+} +module_init(da9052_ts_init);
+static void __exit da9052_ts_exit(void) +{
- platform_driver_unregister(&da9052_tsi_driver);
+} +module_exit(da9052_ts_exit);
+MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052"); +MODULE_AUTHOR("David Dajun Chen dchen@diasemi.com"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-tsi");
Thanks.
-
ashishj3 -
Dmitry Torokhov