Hello,
I have made some other working on this code, so I'll sync with your
differences and send you the complete code on monday, as it is in my
office computer.
Best Regards,
2009/9/15 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>:
> Hi Raphael,
>
> On Thu, Aug 20, 2009 at 05:15:52PM -0300, Raphael Derosso Pereira wrote:
>> From: Raphael Derosso Pereira <raphaelpereira@xxxxxxxxx>
>>
>> Initial version of AT42QT2160 Atmel Sensor Chip support. This version only
>> supports individual cells (no slide support yet). The code has been tested
>> on proprietary development ARM board, but should work fine on other machines.
>>
>> Signed-off-by: Raphael Derosso Pereira <raphaelpereira@xxxxxxxxx>
>
> This version is much better, thank you very much for making the changes
> I requested.
>
>> +
>> +#define QT2160_CMD_CHIPID (00)
>> +#define QT2160_CMD_CODEVER (01)
>> +#define QT2160_CMD_GSTAT (02)
>> +#define QT2160_CMD_KEYS3 (03)
>> +#define QT2160_CMD_KEYS4 (04)
>> +#define QT2160_CMD_SLIDE (05)
>> +#define QT2160_CMD_GPIOS (06)
>> +#define QT2160_CMD_SUBVER (07)
>> +#define QT2160_CMD_CALIBRATE (10)
>
> I am a bit concerned about this chunk. The first 8 commands are written
> as octal while the last (calibrate) as decimal. Is this intentional?
>
> I also made a few more changes. Could you please trythe patch below and
> if everything is still working I will apply to my tree.
>
> Thanks!
>
> --
> Dmitry
>
> Input: AT42QT2160 - various fixups
>
> From: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
>
> Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
> ---
>
> drivers/input/keyboard/qt2160.c | 374 ++++++++++++++++++---------------------
> 1 files changed, 171 insertions(+), 203 deletions(-)
>
>
> diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c
> index 1f9882b..c1b80da 100644
> --- a/drivers/input/keyboard/qt2160.c
> +++ b/drivers/input/keyboard/qt2160.c
> @@ -1,22 +1,22 @@
> /*
> - qt2160.c - Atmel AT42QT2160 Touch Sense Controller
> -
> - Copyright (C) 2009 Raphael Derosso Pereira <raphaelpereira@xxxxxxxxx>
> -
> - 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> -*/
> + * qt2160.c - Atmel AT42QT2160 Touch Sense Controller
> + *
> + * Copyright (C) 2009 Raphael Derosso Pereira <raphaelpereira@xxxxxxxxx>
> + *
> + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> + */
>
> #include <linux/kernel.h>
> #include <linux/init.h>
> @@ -27,117 +27,110 @@
> #include <linux/irq.h>
> #include <linux/interrupt.h>
> #include <linux/input.h>
> -#include <linux/mutex.h>
>
> -#define QT2160_VALID_CHIPID (0x11)
> +#define QT2160_VALID_CHIPID 0x11
>
> -#define QT2160_CMD_CHIPID (00)
> -#define QT2160_CMD_CODEVER (01)
> -#define QT2160_CMD_GSTAT (02)
> -#define QT2160_CMD_KEYS3 (03)
> -#define QT2160_CMD_KEYS4 (04)
> -#define QT2160_CMD_SLIDE (05)
> -#define QT2160_CMD_GPIOS (06)
> -#define QT2160_CMD_SUBVER (07)
> -#define QT2160_CMD_CALIBRATE (10)
> +#define QT2160_CMD_CHIPID 00
> +#define QT2160_CMD_CODEVER 01
> +#define QT2160_CMD_GSTAT 02
> +#define QT2160_CMD_KEYS3 03
> +#define QT2160_CMD_KEYS4 04
> +#define QT2160_CMD_SLIDE 05
> +#define QT2160_CMD_GPIOS 06
> +#define QT2160_CMD_SUBVER 07
> +#define QT2160_CMD_CALIBRATE 10
>
> #define QT2160_CYCLE_INTERVAL (HZ)
>
> -static unsigned char qt2160_key2code[] = {
> - KEY_0, KEY_1, KEY_2, KEY_3,
> - KEY_4, KEY_5, KEY_6, KEY_7,
> - KEY_8, KEY_9, KEY_A, KEY_B,
> - KEY_C, KEY_D, KEY_E, KEY_F,
> +static const unsigned short qt2160_keycodes[] = {
> + KEY_0, KEY_1, KEY_2, KEY_3,
> + KEY_4, KEY_5, KEY_6, KEY_7,
> + KEY_8, KEY_9, KEY_A, KEY_B,
> + KEY_C, KEY_D, KEY_E, KEY_F,
> };
>
> struct qt2160_data {
> - struct mutex mlock;
> struct i2c_client *client;
> - struct delayed_work handle_work;
> - struct work_struct handle_irq_work;
> struct input_dev *input;
> - u8 version_major;
> - u8 version_minor;
> - u8 version_rev;
> + struct delayed_work dwork;
> + spinlock_t lock; /* Protects canceling/rescheduling of dwork */
> + unsigned short keycodes[ARRAY_SIZE(qt2160_keycodes)];
> u16 key_matrix;
> };
>
> static int qt2160_read(struct i2c_client *client, u8 reg)
> {
> - int ret;
> + int error;
>
> - ret = i2c_smbus_write_byte(client, reg);
> - if (ret) {
> + error = i2c_smbus_write_byte(client, reg);
> + if (error) {
> dev_err(&client->dev,
> - "couldn't send request. Returned %d\n", ret);
> - return ret;
> + "couldn't send request. Returned %d\n", error);
> + return error;
> }
>
> - ret = i2c_smbus_read_byte(client);
> - if (ret < 0) {
> + error = i2c_smbus_read_byte(client);
> + if (error < 0) {
> dev_err(&client->dev,
> - "couldn't read register. Returned %d\n", ret);
> - return ret;
> + "couldn't read register. Returned %d\n", error);
> + return error;
> }
>
> - return ret;
> + return 0;
> }
>
> static int qt2160_write(struct i2c_client *client, u8 reg, u8 data)
> {
> - int ret;
> + int error;
>
> - ret = i2c_smbus_write_byte(client, reg);
> - if (ret) {
> + error = i2c_smbus_write_byte(client, reg);
> + if (error) {
> dev_err(&client->dev,
> - "couldn't send request. Returned %d\n", ret);
> - return ret;
> + "couldn't send request. Returned %d\n", error);
> + return error;
> }
>
> - ret = i2c_smbus_write_byte(client, data);
> - if (ret) {
> + error = i2c_smbus_write_byte(client, data);
> + if (error) {
> dev_err(&client->dev,
> - "couldn't write data. Returned %d\n", ret);
> - return ret;
> + "couldn't write data. Returned %d\n", error);
> + return error;
> }
>
> - return ret;
> + return 0;
> }
>
> -static int qt2160_get_key_matrix(struct i2c_client *client)
> +static int qt2160_get_key_matrix(struct qt2160_data *qt2160)
> {
> - int ret, i;
> - struct qt2160_data *qt2160;
> + struct i2c_client *client = qt2160->client;
> + struct input_dev *input = qt2160->input;
> u16 old_matrix;
> + int ret, i;
>
> dev_dbg(&client->dev, "requesting keys...\n");
> - qt2160 = i2c_get_clientdata(client);
> - mutex_lock(&qt2160->mlock);
>
> /* Read General Status Register */
> ret = qt2160_read(client, QT2160_CMD_GSTAT);
> if (ret < 0) {
> dev_err(&client->dev,
> - "could not get general status register\n");
> - goto err_unlock;
> + "could not get general status register\n");
> + return ret;
> }
>
> old_matrix = qt2160->key_matrix;
>
> ret = qt2160_read(client, QT2160_CMD_KEYS3);
> if (ret < 0) {
> - dev_err(&client->dev,
> - "could not get keys from register 3\n");
> - goto err_unlock;
> + dev_err(&client->dev, "could not get keys from register 3\n");
> + return ret;
> }
>
> qt2160->key_matrix = ret;
>
> ret = qt2160_read(client, QT2160_CMD_KEYS4);
> if (ret < 0) {
> - dev_err(&client->dev,
> - "could not get keys from register 4\n");
> - goto err_unlock;
> + dev_err(&client->dev, "could not get keys from register 4\n");
> + return ret;
> }
>
> qt2160->key_matrix |= (ret << 8);
> @@ -145,199 +138,183 @@ static int qt2160_get_key_matrix(struct i2c_client *client)
> /* Read slide and GPIOs to clear CHANGE pin */
> ret = qt2160_read(client, QT2160_CMD_SLIDE);
> if (ret < 0) {
> - dev_err(&client->dev,
> - "could not get slide status\n");
> - goto err_unlock;
> + dev_err(&client->dev, "could not get slide status\n");
> + return ret;
> }
>
> ret = qt2160_read(client, QT2160_CMD_GPIOS);
> if (ret < 0) {
> dev_err(&client->dev, "could not get GPIOs\n");
> - goto err_unlock;
> + return ret;
> }
>
> for (i = 0; i < 16; ++i) {
> int keyval = (qt2160->key_matrix >> i) & 0x01;
>
> if (((old_matrix >> i) & 0x01) != keyval) {
> - input_report_key(qt2160->input,
> - ((unsigned char *)qt2160->input->keycode)[i],
> - keyval);
> - input_sync(qt2160->input);
> -
> - if (keyval)
> - dev_dbg(&client->dev, "key %d pressed\n", i);
> - else
> - dev_dbg(&client->dev, "key %d released\n", i);
> + dev_dbg(&client->dev, "key %d %s\n",
> + i, keyval ? "pressed" : "released");
> +
> + input_report_key(input, qt2160->keycodes[i], keyval);
> + input_sync(input);
> }
> }
>
> - mutex_unlock(&qt2160->mlock);
> return 0;
> -
> -err_unlock:
> - mutex_unlock(&qt2160->mlock);
> - return ret;
> }
>
> static irqreturn_t qt2160_irq(int irq, void *_qt2160)
> {
> struct qt2160_data *qt2160 = _qt2160;
> + unsigned long flags;
>
> - schedule_work(&qt2160->handle_irq_work);
> - return IRQ_HANDLED;
> -}
> + spin_lock_irqsave(&qt2160->lock, flags);
>
> -static void qt2160_worker(struct work_struct *work)
> -{
> - struct qt2160_data *qt2160;
> + __cancel_delayed_work(&qt2160->dwork);
> + schedule_delayed_work(&qt2160->dwork, 0);
>
> - qt2160 = container_of(work, struct qt2160_data,
> - handle_irq_work);
> + spin_unlock_irqrestore(&qt2160->lock, flags);
>
> - dev_dbg(&qt2160->client->dev, "irq worker\n");
> - qt2160_get_key_matrix(qt2160->client);
> + return IRQ_HANDLED;
> }
>
> -static void qt2160_cycle_worker(struct work_struct *work)
> +static void qt2160_worker(struct work_struct *work)
> {
> - struct qt2160_data *qt2160;
> + struct qt2160_data *qt2160 =
> + container_of(work, struct qt2160_data, dwork.work);
>
> - qt2160 = container_of(work, struct qt2160_data,
> - handle_work.work);
> + dev_dbg(&qt2160->client->dev, "worker\n");
>
> - dev_dbg(&qt2160->client->dev, "cycling worker\n");
> - qt2160_get_key_matrix(qt2160->client);
> + qt2160_get_key_matrix(qt2160);
>
> /* Avoid lock checking every 500ms */
> - schedule_delayed_work(&qt2160->handle_work, QT2160_CYCLE_INTERVAL);
> + spin_lock_irq(&qt2160->lock);
> + schedule_delayed_work(&qt2160->dwork, QT2160_CYCLE_INTERVAL);
> + spin_unlock_irq(&qt2160->lock);
> }
>
> -static int __devinit qt2160_probe(struct i2c_client *client,
> - const struct i2c_device_id *id)
> -{
> - int ret, i;
> - struct qt2160_data *qt2160;
>
> - dev_info(&client->dev, "probing device...\n");
> +static bool __devinit qt2160_identify(struct i2c_client *client)
> +{
> + int id, ver, rev;
>
> /* Read Chid ID to check if chip is valid */
> - ret = qt2160_read(client, QT2160_CMD_CHIPID);
> - if (ret != QT2160_VALID_CHIPID) {
> - dev_err(&client->dev, "ID %d not supported\n", ret);
> - return ret;
> + id = qt2160_read(client, QT2160_CMD_CHIPID);
> + if (id != QT2160_VALID_CHIPID) {
> + dev_err(&client->dev, "ID %d not supported\n", id);
> + return false;
> }
>
> - /* Chip is valid and active. Allocate structure */
> - qt2160 = kzalloc(sizeof(struct qt2160_data), GFP_KERNEL);
> - if (!qt2160) {
> - dev_err(&client->dev, "insufficient memory\n");
> - return -ENOMEM;
> - }
> -
> - i2c_set_clientdata(client, qt2160);
> - qt2160->client = client;
> -
> /* Read chip firmware version */
> - ret = qt2160_read(client, QT2160_CMD_CODEVER);
> - if (ret < 0) {
> + ver = qt2160_read(client, QT2160_CMD_CODEVER);
> + if (ver < 0) {
> dev_err(&client->dev, "could not get firmware version\n");
> - goto err_free_qtdata;
> + return false;
> }
>
> - qt2160->version_major = ret >> 4;
> - qt2160->version_minor = ret & 0xf;
> -
> /* Read chip firmware revision */
> - ret = qt2160_read(client, QT2160_CMD_SUBVER);
> - if (ret < 0) {
> + rev = qt2160_read(client, QT2160_CMD_SUBVER);
> + if (rev < 0) {
> dev_err(&client->dev, "could not get firmware revision\n");
> - goto err_free_qtdata;
> + return false;
> }
>
> - qt2160->version_rev = ret;
> -
> dev_info(&client->dev, "AT42QT2160 firmware version %d.%d.%d\n",
> - qt2160->version_major, qt2160->version_minor,
> - qt2160->version_rev);
> + ver >> 4, ver &0xf, rev);
>
> - /* Calibrate device */
> - ret = qt2160_write(client, QT2160_CMD_CALIBRATE, 1);
> - if (ret) {
> - dev_err(&client->dev,
> - "Failed to calibrate device\n");
> - goto err_free_input;
> - }
> + return true;
> +}
>
> - /* Initialize input structure */
> - qt2160->input = input_allocate_device();
> - if (!qt2160->input) {
> - dev_err(&client->dev, "input device: Not enough memory\n");
> - ret = -ENOMEM;
> - goto err_free_qtdata;
> - }
> +static int __devinit qt2160_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct qt2160_data *qt2160;
> + struct input_dev *input;
> + int i;
> + int error;
>
> - qt2160->input->name = "AT42QT2160 Touch Sense Keyboard";
> - qt2160->input->id.bustype = BUS_I2C;
> - qt2160->input->keycode = qt2160_key2code;
> - qt2160->input->keycodesize = sizeof(unsigned char);
> - qt2160->input->keycodemax = ARRAY_SIZE(qt2160_key2code);
> + dev_dbg(&client->dev, "probing device...\n");
>
> - __set_bit(EV_KEY, qt2160->input->evbit);
> - __clear_bit(EV_REP, qt2160->input->evbit);
> - for (i = 0; i < ARRAY_SIZE(qt2160_key2code); i++)
> - __set_bit(qt2160_key2code[i], qt2160->input->keybit);
> + if (!qt2160_identify(client))
> + return -ENODEV;
>
> - ret = input_register_device(qt2160->input);
> - if (ret) {
> + /* Calibrate device */
> + error = qt2160_write(client, QT2160_CMD_CALIBRATE, 1);
> + if (error) {
> dev_err(&client->dev,
> - "input device: Failed to register device\n");
> - goto err_free_input;
> + "Failed to calibrate device\n");
> + return error;
> }
>
> - /* Initialize IRQ structure */
> - mutex_init(&qt2160->mlock);
> + /* Chip is valid and active. Allocate structures */
> + qt2160 = kzalloc(sizeof(struct qt2160_data), GFP_KERNEL);
> + input = input_allocate_device();
> + if (!qt2160 || !input) {
> + dev_err(&client->dev, "insufficient memory\n");
> + error = -ENOMEM;
> + goto err_free_mem;
> + }
>
> - INIT_DELAYED_WORK(&qt2160->handle_work, qt2160_cycle_worker);
> - INIT_WORK(&qt2160->handle_irq_work, qt2160_worker);
> - schedule_delayed_work(&qt2160->handle_work, QT2160_CYCLE_INTERVAL);
> + qt2160->client = client;
> + qt2160->input = input;
> + INIT_DELAYED_WORK(&qt2160->dwork, qt2160_worker);
> + spin_lock_init(&qt2160->lock);
> +
> + input->name = "AT42QT2160 Touch Sense Keyboard";
> + input->id.bustype = BUS_I2C;
> +
> + input->keycode = qt2160->keycodes;
> + input->keycodesize = sizeof(qt2160->keycodes[0]);
> + input->keycodemax = ARRAY_SIZE(qt2160->keycodes);
> +
> + __set_bit(EV_KEY, input->evbit);
> + __clear_bit(EV_REP, input->evbit);
> + for (i = 0; i < ARRAY_SIZE(qt2160_keycodes); i++) {
> + qt2160->keycodes[i] = qt2160_keycodes[i];
> + __set_bit(qt2160_keycodes[i], input->keybit);
> + }
>
> if (client->irq) {
> - ret = request_irq(client->irq, qt2160_irq,
> - (IRQF_TRIGGER_FALLING), "qt2160", qt2160);
> + error = request_irq(client->irq, qt2160_irq,
> + IRQF_TRIGGER_FALLING, "qt2160", qt2160);
>
> - if (ret) {
> + if (error) {
> dev_err(&client->dev,
> - "failed to allocate irq %d\n",
> - client->irq);
> - goto err_free_input;
> + "failed to allocate irq %d\n", client->irq);
> + goto err_free_mem;
> }
> }
>
> - dev_info(&client->dev, "AT42QT2160 reset completed\n");
> + error = input_register_device(qt2160->input);
> + if (error) {
> + dev_err(&client->dev, "failed to register input device\n");
> + goto err_free_irq;
> + }
> +
> + schedule_delayed_work(&qt2160->dwork, QT2160_CYCLE_INTERVAL);
> +
> + i2c_set_clientdata(client, qt2160);
> return 0;
>
> -err_free_input:
> +err_free_irq:
> + if (client->irq)
> + free_irq(client->irq, qt2160);
> +err_free_mem:
> input_free_device(qt2160->input);
> -
> -err_free_qtdata:
> kfree(qt2160);
> - i2c_set_clientdata(client, NULL);
> - return ret;
> + return error;
> }
>
> static int __devexit qt2160_remove(struct i2c_client *client)
> {
> - struct qt2160_data *qt2160;
> -
> - qt2160 = i2c_get_clientdata(client);
> + struct qt2160_data *qt2160 = i2c_get_clientdata(client);
>
> /* Release IRQ so no queue will be scheduled */
> - free_irq(client->irq, qt2160);
> + if (client->irq)
> + free_irq(client->irq, qt2160);
>
> - /* Wait all pending works */
> - cancel_delayed_work_sync(&qt2160->handle_work);
> - cancel_work_sync(&qt2160->handle_irq_work);
> + /* Wait for delayed work to complete */
> + cancel_delayed_work_sync(&qt2160->dwork);
>
> /* Unregister input device */
> input_unregister_device(qt2160->input);
> @@ -346,7 +323,6 @@ static int __devexit qt2160_remove(struct i2c_client *client)
> kfree(qt2160);
> i2c_set_clientdata(client, NULL);
>
> - dev_info(&client->dev, "AT42QT2160 removed.\n");
> return 0;
> }
>
> @@ -365,20 +341,12 @@ static struct i2c_driver qt2160_driver = {
>
> .id_table = qt2160_idtable,
> .probe = qt2160_probe,
> - .remove = qt2160_remove,
> + .remove = __devexit_p(qt2160_remove),
> };
>
> static int __init qt2160_init(void)
> {
> - int res;
> -
> - res = i2c_add_driver(&qt2160_driver);
> - if (res) {
> - printk(KERN_ERR "qt2160: Driver registration failed, "
> - "module not inserted.\n");
> - return res;
> - }
> - return 0;
> + return i2c_add_driver(&qt2160_driver);
> }
>
> static void __exit qt2160_cleanup(void)
>
--
Raphael Derosso Pereira
Engenheiro de Computação
msn: rderossopereira@xxxxxxxxxxx
Skype: rderossopereira
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