Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753037AbaDNH7u (ORCPT ); Mon, 14 Apr 2014 03:59:50 -0400 Received: from relay-s04-hub006.domainlocalhost.com ([74.115.207.217]:31497 "EHLO relay-S04-HUB006.domainlocalhost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752772AbaDNH7q (ORCPT ); Mon, 14 Apr 2014 03:59:46 -0400 Content-Type: multipart/mixed; boundary="_000_77BC725C9062764F874D79F51E1F1A8F40C1144AS04MBX0101s04lo_" From: Dudley Du To: "Dmitry Torokhov (dmitry.torokhov@gmail.com)" CC: Benson Leung , Daniel Kurtz , "linux-input@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH 4/6] input: cyapa: enable/disable trackpad device based on LID state Thread-Topic: [PATCH 4/6] input: cyapa: enable/disable trackpad device based on LID state Thread-Index: Ac9Xtrung2rcRTzSQqSjaCWaMF8SMw== Date: Mon, 14 Apr 2014 07:54:18 +0000 Message-ID: <77BC725C9062764F874D79F51E1F1A8F40C1144A@S04-MBX01-01.s04.local> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: <77BC725C9062764F874D79F51E1F1A8F40C1144A@S04-MBX01-01.s04.local> x-originating-ip: [10.30.12.148] MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --_000_77BC725C9062764F874D79F51E1F1A8F40C1144AS04MBX0101s04lo_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Rely on EV_SW and SW_LID bits to identify a LID device, and hook up our filter to listen for SW_LID events to enable/disable touchpad when LID is open/closed. TEST=3Dtest on Chomebooks. Signed-off-by: Du, Dudley --- diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 6820b3f..da03427 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -523,6 +523,9 @@ struct cyapa { int physical_size_x; int physical_size_y; + bool lid_handler_registered; + struct input_handler lid_handler; + /* used in ttsp and truetouch based trackpad devices. */ u8 x_origin; /* X Axis Origin: 0 =3D left side; 1 =3D rigth side. = */ u8 y_origin; /* Y Axis Origin: 0 =3D top; 1 =3D bottom. */ @@ -3107,6 +3110,125 @@ static void cyapa_start_runtime(struct cyapa *cyapa= ) static void cyapa_start_runtime(struct cyapa *cyapa) {} #endif /* CONFIG_PM_RUNTIME */ + +/* + * We rely on EV_SW and SW_LID bits to identify a LID device, and hook + * up our filter to listen for SW_LID events to enable/disable touchpad wh= en + * LID is open/closed. + */ +static const struct input_device_id lid_device_ids[] =3D { + { + .flags =3D INPUT_DEVICE_ID_MATCH_EVBIT | + INPUT_DEVICE_ID_MATCH_SWBIT, + .evbit =3D { BIT_MASK(EV_SW) }, + .swbit =3D { BIT_MASK(SW_LID) }, + }, + { }, +}; + +static int lid_device_connect(struct input_handler *handler, + struct input_dev *dev, + const struct input_device_id *id) +{ + struct input_handle *lid_handle; + int error; + + lid_handle =3D kzalloc(sizeof(struct input_handle), GFP_KERNEL); + if (!lid_handle) + return -ENOMEM; + + lid_handle->dev =3D dev; + lid_handle->handler =3D handler; + lid_handle->name =3D "lid_event_handler"; + lid_handle->private =3D handler->private; + + error =3D input_register_handle(lid_handle); + if (error) + goto err_free; + + error =3D input_open_device(lid_handle); + if (error) + goto err_unregister; + + return 0; +err_unregister: + input_unregister_handle(lid_handle); +err_free: + kfree(lid_handle); + return error; +} + +static void lid_device_disconnect(struct input_handle *handle) +{ + input_close_device(handle); + input_unregister_handle(handle); + kfree(handle); +} + +static bool lid_event_filter(struct input_handle *handle, + unsigned int type, unsigned int code, int valu= e) +{ + struct cyapa *cyapa =3D handle->private; + struct device *dev =3D &cyapa->client->dev; + + if (type =3D=3D EV_SW && code =3D=3D SW_LID) { + if (cyapa->suspended) { + /* + * If the lid event filter is called while suspende= d, + * there is no guarantee that the underlying i2cs a= re + * resumed at this point, so it is not safe to issu= e + * the command to change power modes. + * Instead, rely on cyapa_resume to set us back to + * PWR_MODE_FULL_ACTIVE. + */ + return false; + } + if (value =3D=3D 0) { + if (cyapa->cyapa_set_power_mode) + cyapa->cyapa_set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + } else { + pm_runtime_disable(dev); + if (cyapa->cyapa_set_power_mode) + cyapa->cyapa_set_power_mode(cyapa, + PWR_MODE_OFF, 0); + } + } + + return false; +} + +static void lid_event_register_handler(struct cyapa *cyapa) +{ + int error; + struct input_handler *lid_handler =3D &cyapa->lid_handler; + + if (cyapa->lid_handler_registered) + return; + + lid_handler->filter =3D lid_event_filter; + lid_handler->connect =3D lid_device_connect; + lid_handler->disconnect =3D lid_device_disconnect; + lid_handler->name =3D "cyapa_lid_event_handler"; + lid_handler->id_table =3D lid_device_ids; + lid_handler->private =3D cyapa; + + error =3D input_register_handler(lid_handler); + if (error) + return; + cyapa->lid_handler_registered =3D true; +} + +static void lid_event_unregister_handler(struct cyapa *cyapa) +{ + if (cyapa->lid_handler_registered) { + input_unregister_handler(&cyapa->lid_handler); + cyapa->lid_handler_registered =3D false; + } +} + static void cyapa_detect_async(void *data, async_cookie_t cookie) { struct cyapa *cyapa =3D (struct cyapa *)data; @@ -3126,6 +3248,7 @@ static void cyapa_detect_and_start(void *data, async_= cookie_t cookie) cyapa_detect_async(data, cookie); cyapa_start_runtime(cyapa); + lid_event_register_handler(cyapa); } static int cyapa_probe(struct i2c_client *client, @@ -3221,7 +3344,7 @@ static int cyapa_remove(struct i2c_client *client) free_irq(cyapa->irq, cyapa); input_unregister_device(cyapa->input); - + lid_event_unregister_handler(cyapa); if (cyapa->cyapa_set_power_mode) cyapa->cyapa_set_power_mode(cyapa, PWR_MODE_OFF, 0); i2c_set_clientdata(client, NULL); This message and any attachments may contain Cypress (or its subsidiaries) = confidential information. 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