From 7a53d60926714541e2250b7c55100883cdcaf787 Mon Sep 17 00:00:00 2001 From: Nick Dyer Date: Wed, 23 Jul 2014 12:21:26 -0700 Subject: [PATCH] Input: atmel_mxt_ts - move input device init into separate function It is useful to initialise the input device later: - Screen parameters may not be not known yet, for instance if waiting for firmware loader to return. - Device may be in bootloader mode on probe (but could still be recovered by firmware download). In addition, later devices have a different touchscreen object (T100) which requires handling differently. This also reduces the complexity of the probe function. Signed-off-by: Nick Dyer Acked-by: Yufeng Shen Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/atmel_mxt_ts.c | 191 +++++++++++++---------- 1 file changed, 107 insertions(+), 84 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 02c374d52967..a248414642d9 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -1047,6 +1047,9 @@ static int mxt_get_object_table(struct mxt_data *data) static void mxt_free_object_table(struct mxt_data *data) { + input_unregister_device(data->input_dev); + data->input_dev = NULL; + kfree(data->object_table); data->object_table = NULL; data->T6_reportid = 0; @@ -1103,6 +1106,102 @@ static int mxt_read_t9_resolution(struct mxt_data *data) return 0; } +static int mxt_input_open(struct input_dev *dev); +static void mxt_input_close(struct input_dev *dev); + +static int mxt_initialize_t9_input_device(struct mxt_data *data) +{ + struct device *dev = &data->client->dev; + const struct mxt_platform_data *pdata = data->pdata; + struct input_dev *input_dev; + int error; + unsigned int num_mt_slots; + unsigned int mt_flags = 0; + int i; + + error = mxt_read_t9_resolution(data); + if (error) + dev_warn(dev, "Failed to initialize T9 resolution\n"); + + input_dev = input_allocate_device(); + if (!input_dev) { + dev_err(dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + input_dev->name = "Atmel maXTouch Touchscreen"; + input_dev->phys = data->phys; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = dev; + input_dev->open = mxt_input_open; + input_dev->close = mxt_input_close; + + __set_bit(EV_ABS, input_dev->evbit); + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); + + if (pdata->t19_num_keys) { + __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); + + for (i = 0; i < pdata->t19_num_keys; i++) + if (pdata->t19_keymap[i] != KEY_RESERVED) + input_set_capability(input_dev, EV_KEY, + pdata->t19_keymap[i]); + + mt_flags |= INPUT_MT_POINTER; + + 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); + + input_dev->name = "Atmel maXTouch Touchpad"; + } + + /* For single touch */ + input_set_abs_params(input_dev, ABS_X, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + 0, data->max_y, 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, + 0, 255, 0, 0); + + /* For multi touch */ + num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; + error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); + if (error) { + dev_err(dev, "Error %d initialising slots\n", error); + goto err_free_mem; + } + + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, + 0, MXT_MAX_AREA, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_X, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, data->max_y, 0, 0); + input_set_abs_params(input_dev, ABS_MT_PRESSURE, + 0, 255, 0, 0); + + input_set_drvdata(input_dev, data); + + error = input_register_device(input_dev); + if (error) { + dev_err(dev, "Error %d registering input device\n", error); + goto err_free_mem; + } + + data->input_dev = input_dev; + + return 0; + +err_free_mem: + input_free_device(input_dev); + return error; +} + static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; @@ -1132,11 +1231,9 @@ static int mxt_initialize(struct mxt_data *data) goto err_free_object_table; } - error = mxt_read_t9_resolution(data); - if (error) { - dev_err(&client->dev, "Failed to initialize T9 resolution\n"); + error = mxt_initialize_t9_input_device(data); + if (error) goto err_free_object_table; - } dev_info(&client->dev, "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", @@ -1432,40 +1529,26 @@ static void mxt_input_close(struct input_dev *dev) static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) { - const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev); struct mxt_data *data; - struct input_dev *input_dev; + const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev); int error; - unsigned int num_mt_slots; - unsigned int mt_flags = 0; - int i; if (!pdata) return -EINVAL; data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!data || !input_dev) { + if (!data) { dev_err(&client->dev, "Failed to allocate memory\n"); - error = -ENOMEM; - goto err_free_mem; + return -ENOMEM; } - input_dev->name = "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; - input_dev->dev.parent = &client->dev; - input_dev->open = mxt_input_open; - input_dev->close = mxt_input_close; - data->client = client; - data->input_dev = input_dev; data->pdata = pdata; data->irq = client->irq; + i2c_set_clientdata(client, data); init_completion(&data->bl_completion); init_completion(&data->reset_completion); @@ -1481,84 +1564,24 @@ static int mxt_probe(struct i2c_client *client, disable_irq(client->irq); - error = input_register_device(input_dev); - if (error) { - dev_err(&client->dev, "Error %d registering input device\n", - error); - goto err_free_irq; - } - error = mxt_initialize(data); if (error) - goto err_unregister_device; - - __set_bit(EV_ABS, input_dev->evbit); - __set_bit(EV_KEY, input_dev->evbit); - __set_bit(BTN_TOUCH, input_dev->keybit); - - if (pdata->t19_num_keys) { - __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); - - for (i = 0; i < pdata->t19_num_keys; i++) - if (pdata->t19_keymap[i] != KEY_RESERVED) - input_set_capability(input_dev, EV_KEY, - pdata->t19_keymap[i]); - - mt_flags |= INPUT_MT_POINTER; - - 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); - - input_dev->name = "Atmel maXTouch Touchpad"; - } - - /* For single touch */ - input_set_abs_params(input_dev, ABS_X, - 0, data->max_x, 0, 0); - input_set_abs_params(input_dev, ABS_Y, - 0, data->max_y, 0, 0); - input_set_abs_params(input_dev, ABS_PRESSURE, - 0, 255, 0, 0); - - /* For multi touch */ - num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; - error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); - if (error) - goto err_free_object; - input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, - 0, MXT_MAX_AREA, 0, 0); - input_set_abs_params(input_dev, ABS_MT_POSITION_X, - 0, data->max_x, 0, 0); - input_set_abs_params(input_dev, ABS_MT_POSITION_Y, - 0, data->max_y, 0, 0); - input_set_abs_params(input_dev, ABS_MT_PRESSURE, - 0, 255, 0, 0); - - input_set_drvdata(input_dev, data); - i2c_set_clientdata(client, data); + goto err_free_irq; error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); if (error) { dev_err(&client->dev, "Failure %d creating sysfs group\n", error); - goto err_unregister_device; + goto err_free_object; } return 0; -err_unregister_device: - input_unregister_device(input_dev); - input_dev = NULL; err_free_object: kfree(data->object_table); err_free_irq: free_irq(client->irq, data); err_free_mem: - input_free_device(input_dev); kfree(data); return error; } -- GitLab