Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760318Ab3CHDn4 (ORCPT ); Thu, 7 Mar 2013 22:43:56 -0500 Received: from mail-pa0-f47.google.com ([209.85.220.47]:51486 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760174Ab3CHDnq (ORCPT ); Thu, 7 Mar 2013 22:43:46 -0500 From: Benson Leung To: torvalds@linux-foundation.org, olofj@chromium.org, miletus@chromium.org, dmitry.torokhov@gmail.com, matthew.garrett@nebula.com, rydberg@euromail.se, djkurtz@chromium.org, jy0922.shim@samsung.com, wfp5p@virginia.edu, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Cc: bleung@chromium.org, davem@davemloft.net, Nick Dyer Subject: [PATCH v3 1/2] Input: atmel_mxt_ts - Support for touchpad variant Date: Thu, 7 Mar 2013 19:43:33 -0800 Message-Id: <1362714214-32405-2-git-send-email-bleung@chromium.org> X-Mailer: git-send-email 1.8.1.3 In-Reply-To: <1362714214-32405-1-git-send-email-bleung@chromium.org> References: <1362187254-9227-1-git-send-email-bleung@chromium.org> <1362714214-32405-1-git-send-email-bleung@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6613 Lines: 214 From: Daniel Kurtz This same driver can be used by atmel based touchscreens and touchpads (buttonpads). Platform data may specify a device is a touchpad using the is_tp flag. This will cause the driver to perform some touchpad specific initializations, such as: * register input device name "Atmel maXTouch Touchpad" instead of Touchscreen. * register BTN_LEFT & BTN_TOOL_* event types. * register axis resolution (as a fixed constant, for now) * register BUTTONPAD property * process GPIO buttons using reportid T19 Input event GPIO mapping is done by the platform data key_map array. key_map[x] should contain the KEY or BTN code to send when processing GPIOx from T19. To specify a GPIO as not an input source, populate with KEY_RESERVED, or 0. Signed-off-by: Daniel Kurtz Signed-off-by: Benson Leung Signed-off-by: Nick Dyer Tested-by: Olof Johansson --- v3: Add key_map array to map gpios to keys or buttons. Configure is_tp from pdata. v2: zero reportid in mxt_object_table_free(), Thanks nick.dyer@itdev.co.uk v1: Initial --- drivers/input/touchscreen/atmel_mxt_ts.c | 65 +++++++++++++++++++++++++++++++- include/linux/i2c/atmel_mxt_ts.h | 5 +++ 2 files changed, 68 insertions(+), 2 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index d04f810..feafbb8 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -181,6 +181,12 @@ #define MXT_FWRESET_TIME 175 /* msec */ +/* MXT_SPT_GPIOPWM_T19 field */ +#define MXT_GPIO0_MASK 0x04 +#define MXT_GPIO1_MASK 0x08 +#define MXT_GPIO2_MASK 0x10 +#define MXT_GPIO3_MASK 0x20 + /* Command to unlock bootloader */ #define MXT_UNLOCK_CMD_MSB 0xaa #define MXT_UNLOCK_CMD_LSB 0xdc @@ -212,6 +218,8 @@ /* Touchscreen absolute values */ #define MXT_MAX_AREA 0xff +#define MXT_PIXELS_PER_MM 20 + struct mxt_info { u8 family_id; u8 variant_id; @@ -243,6 +251,8 @@ struct mxt_data { const struct mxt_platform_data *pdata; struct mxt_object *object_table; struct mxt_info info; + bool is_tp; + unsigned int irq; unsigned int max_x; unsigned int max_y; @@ -251,6 +261,7 @@ struct mxt_data { u8 T6_reportid; u8 T9_reportid_min; u8 T9_reportid_max; + u8 T19_reportid; }; static bool mxt_object_readable(unsigned int type) @@ -502,6 +513,22 @@ static int mxt_write_object(struct mxt_data *data, return mxt_write_reg(data->client, reg + offset, val); } +static void mxt_input_button(struct mxt_data *data, struct mxt_message *message) +{ + struct device *dev = &data->client->dev; + struct input_dev *input = data->input_dev; + bool button; + int i; + + /* Active-low switch */ + for (i = 0; i < MXT_NUM_GPIO; i++) { + if (data->pdata->key_map[i] == KEY_RESERVED) + continue; + button = !(message->message[0] & MXT_GPIO0_MASK << i); + input_report_key(input, data->pdata->key_map[i], button); + } +} + static void mxt_input_touchevent(struct mxt_data *data, struct mxt_message *message, int id) { @@ -585,6 +612,9 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id) int id = reportid - data->T9_reportid_min; mxt_input_touchevent(data, &message, id); update_input = true; + } else if (message.reportid == data->T19_reportid) { + mxt_input_button(data, &message); + update_input = true; } else { mxt_dump_message(dev, &message); } @@ -764,6 +794,9 @@ static int mxt_get_object_table(struct mxt_data *data) data->T9_reportid_min = min_id; data->T9_reportid_max = max_id; break; + case MXT_SPT_GPIOPWM_T19: + data->T19_reportid = min_id; + break; } } @@ -777,7 +810,7 @@ static void mxt_free_object_table(struct mxt_data *data) data->T6_reportid = 0; data->T9_reportid_min = 0; data->T9_reportid_max = 0; - + data->T19_reportid = 0; } static int mxt_initialize(struct mxt_data *data) @@ -1115,9 +1148,13 @@ static int mxt_probe(struct i2c_client *client, goto err_free_mem; } - input_dev->name = "Atmel maXTouch Touchscreen"; + data->is_tp = pdata && pdata->is_tp; + + input_dev->name = (data->is_tp) ? "Atmel maXTouch Touchpad" : + "Atmel maXTouch Touchscreen"; snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", client->adapter->nr, client->addr); + input_dev->phys = data->phys; input_dev->id.bustype = BUS_I2C; @@ -1140,6 +1177,29 @@ static int mxt_probe(struct i2c_client *client, __set_bit(EV_KEY, input_dev->evbit); __set_bit(BTN_TOUCH, input_dev->keybit); + if (data->is_tp) { + int i; + __set_bit(INPUT_PROP_POINTER, input_dev->propbit); + __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); + + for (i = 0; i < MXT_NUM_GPIO; i++) + if (pdata->key_map[i] != KEY_RESERVED) + __set_bit(pdata->key_map[i], input_dev->keybit); + + __set_bit(BTN_TOOL_FINGER, input_dev->keybit); + __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); + __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); + __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); + __set_bit(BTN_TOOL_QUINTTAP, input_dev->keybit); + + input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_MT_POSITION_X, + MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_MT_POSITION_Y, + MXT_PIXELS_PER_MM); + } + /* For single touch */ input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0); @@ -1258,6 +1318,7 @@ static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); static const struct i2c_device_id mxt_id[] = { { "qt602240_ts", 0 }, { "atmel_mxt_ts", 0 }, + { "atmel_mxt_tp", 0 }, { "mXT224", 0 }, { } }; diff --git a/include/linux/i2c/atmel_mxt_ts.h b/include/linux/i2c/atmel_mxt_ts.h index f027f7a..99e379b 100644 --- a/include/linux/i2c/atmel_mxt_ts.h +++ b/include/linux/i2c/atmel_mxt_ts.h @@ -15,6 +15,9 @@ #include +/* For key_map array */ +#define MXT_NUM_GPIO 4 + /* Orient */ #define MXT_NORMAL 0x0 #define MXT_DIAGONAL 0x1 @@ -39,6 +42,8 @@ struct mxt_platform_data { unsigned int voltage; unsigned char orient; unsigned long irqflags; + bool is_tp; + const unsigned int key_map[MXT_NUM_GPIO]; }; #endif /* __LINUX_ATMEL_MXT_TS_H */ -- 1.8.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/