diff options
Diffstat (limited to 'include/media/v4l2-i2c-drv-legacy.h')
| -rw-r--r-- | include/media/v4l2-i2c-drv-legacy.h | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/include/media/v4l2-i2c-drv-legacy.h b/include/media/v4l2-i2c-drv-legacy.h deleted file mode 100644 index e65dd9d..0000000 --- a/include/media/v4l2-i2c-drv-legacy.h +++ /dev/null @@ -1,152 +0,0 @@ -/* - * v4l2-i2c-drv-legacy.h - contains I2C handling code that's identical - * for all V4L2 I2C drivers. Use this header if the - * I2C driver is used by both legacy drivers and - * drivers converted to the bus-based I2C API. - * - * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> - * - * 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. - */ - -/* NOTE: the full version of this header is in the v4l-dvb repository - * and allows v4l i2c drivers to be compiled on older kernels as well. - * The version of this header as it appears in the kernel is a stripped - * version (without all the backwards compatibility stuff) and so it - * looks a bit odd. - * - * If you look at the full version then you will understand the reason - * for introducing this header since you really don't want to have all - * the tricky backwards compatibility code in each and every i2c driver. - */ - -struct v4l2_i2c_driver_data { - const char * const name; - int driverid; - int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); - int (*probe)(struct i2c_client *client, const struct i2c_device_id *id); - int (*remove)(struct i2c_client *client); - int (*suspend)(struct i2c_client *client, pm_message_t state); - int (*resume)(struct i2c_client *client); - int (*legacy_probe)(struct i2c_adapter *adapter); - int legacy_class; - const struct i2c_device_id *id_table; -}; - -static struct v4l2_i2c_driver_data v4l2_i2c_data; -static const struct i2c_client_address_data addr_data; -static struct i2c_driver v4l2_i2c_driver_legacy; -static char v4l2_i2c_drv_name_legacy[32]; - -static int v4l2_i2c_drv_attach_legacy(struct i2c_adapter *adapter, int address, int kind) -{ - return v4l2_i2c_attach(adapter, address, &v4l2_i2c_driver_legacy, - v4l2_i2c_drv_name_legacy, v4l2_i2c_data.probe); -} - -static int v4l2_i2c_drv_probe_legacy(struct i2c_adapter *adapter) -{ - if (v4l2_i2c_data.legacy_probe) { - if (v4l2_i2c_data.legacy_probe(adapter)) - return i2c_probe(adapter, &addr_data, v4l2_i2c_drv_attach_legacy); - return 0; - } - if (adapter->class & v4l2_i2c_data.legacy_class) - return i2c_probe(adapter, &addr_data, v4l2_i2c_drv_attach_legacy); - return 0; -} - -static int v4l2_i2c_drv_detach_legacy(struct i2c_client *client) -{ - int err; - - if (v4l2_i2c_data.remove) - v4l2_i2c_data.remove(client); - - err = i2c_detach_client(client); - if (err) - return err; - kfree(client); - return 0; -} - -static int v4l2_i2c_drv_suspend_helper(struct i2c_client *client, pm_message_t state) -{ - return v4l2_i2c_data.suspend ? v4l2_i2c_data.suspend(client, state) : 0; -} - -static int v4l2_i2c_drv_resume_helper(struct i2c_client *client) -{ - return v4l2_i2c_data.resume ? v4l2_i2c_data.resume(client) : 0; -} - -/* ----------------------------------------------------------------------- */ - -/* i2c implementation */ -static struct i2c_driver v4l2_i2c_driver_legacy = { - .driver = { - .owner = THIS_MODULE, - }, - .attach_adapter = v4l2_i2c_drv_probe_legacy, - .detach_client = v4l2_i2c_drv_detach_legacy, - .suspend = v4l2_i2c_drv_suspend_helper, - .resume = v4l2_i2c_drv_resume_helper, -}; - -/* ----------------------------------------------------------------------- */ - -/* i2c implementation */ -static struct i2c_driver v4l2_i2c_driver = { - .suspend = v4l2_i2c_drv_suspend_helper, - .resume = v4l2_i2c_drv_resume_helper, -}; - -static int __init v4l2_i2c_drv_init(void) -{ - int err; - - strlcpy(v4l2_i2c_drv_name_legacy, v4l2_i2c_data.name, sizeof(v4l2_i2c_drv_name_legacy)); - strlcat(v4l2_i2c_drv_name_legacy, "'", sizeof(v4l2_i2c_drv_name_legacy)); - - if (v4l2_i2c_data.legacy_class == 0) - v4l2_i2c_data.legacy_class = I2C_CLASS_TV_ANALOG; - - v4l2_i2c_driver_legacy.driver.name = v4l2_i2c_drv_name_legacy; - v4l2_i2c_driver_legacy.id = v4l2_i2c_data.driverid; - v4l2_i2c_driver_legacy.command = v4l2_i2c_data.command; - err = i2c_add_driver(&v4l2_i2c_driver_legacy); - - if (err) - return err; - v4l2_i2c_driver.driver.name = v4l2_i2c_data.name; - v4l2_i2c_driver.id = v4l2_i2c_data.driverid; - v4l2_i2c_driver.command = v4l2_i2c_data.command; - v4l2_i2c_driver.probe = v4l2_i2c_data.probe; - v4l2_i2c_driver.remove = v4l2_i2c_data.remove; - v4l2_i2c_driver.id_table = v4l2_i2c_data.id_table; - err = i2c_add_driver(&v4l2_i2c_driver); - if (err) - i2c_del_driver(&v4l2_i2c_driver_legacy); - return err; -} - -static void __exit v4l2_i2c_drv_cleanup(void) -{ - i2c_del_driver(&v4l2_i2c_driver_legacy); - i2c_del_driver(&v4l2_i2c_driver); -} - -module_init(v4l2_i2c_drv_init); -module_exit(v4l2_i2c_drv_cleanup); |
