diff options
Diffstat (limited to 'drivers/media/video/tea6420.c')
| -rw-r--r-- | drivers/media/video/tea6420.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/drivers/media/video/tea6420.c b/drivers/media/video/tea6420.c deleted file mode 100644 index 081e74fa3b2..00000000000 --- a/drivers/media/video/tea6420.c +++ /dev/null @@ -1,180 +0,0 @@ - /* - tea6420 - i2c-driver for the tea6420 by SGS Thomson - - Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> - Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> - - The tea6420 is a bus controlled audio-matrix with 5 stereo inputs, - 4 stereo outputs and gain control for each output. - It is cascadable, i.e. it can be found at the adresses 0x98 - and 0x9a on the i2c-bus. - - For detailed informations download the specifications directly - from SGS Thomson at http://www.st.com - - 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/module.h> -#include <linux/ioctl.h> -#include <linux/i2c.h> -#include <media/v4l2-device.h> -#include <media/v4l2-i2c-drv-legacy.h> -#include "tea6420.h" - -MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); -MODULE_DESCRIPTION("tea6420 driver"); -MODULE_LICENSE("GPL"); - -static int debug; -module_param(debug, int, 0644); - -MODULE_PARM_DESC(debug, "Debug level (0-1)"); - -/* addresses to scan, found only at 0x4c and/or 0x4d (7-Bit) */ -static unsigned short normal_i2c[] = { I2C_ADDR_TEA6420_1, I2C_ADDR_TEA6420_2, I2C_CLIENT_END }; - -/* magic definition of all other variables and things */ -I2C_CLIENT_INSMOD; - -/* make a connection between the input 'i' and the output 'o' - with gain 'g' for the tea6420-client 'client' (note: i = 6 means 'mute') */ -static int tea6420_switch(struct i2c_client *client, int i, int o, int g) -{ - u8 byte; - int ret; - - v4l_dbg(1, debug, client, "i=%d, o=%d, g=%d\n", i, o, g); - - /* check if the parameters are valid */ - if (i < 1 || i > 6 || o < 1 || o > 4 || g < 0 || g > 6 || g % 2 != 0) - return -1; - - byte = ((o - 1) << 5); - byte |= (i - 1); - - /* to understand this, have a look at the tea6420-specs (p.5) */ - switch (g) { - case 0: - byte |= (3 << 3); - break; - case 2: - byte |= (2 << 3); - break; - case 4: - byte |= (1 << 3); - break; - case 6: - break; - } - - ret = i2c_smbus_write_byte(client, byte); - if (ret) { - v4l_dbg(1, debug, client, - "i2c_smbus_write_byte() failed, ret:%d\n", ret); - return -EIO; - } - return 0; -} - -static long tea6420_ioctl(struct v4l2_subdev *sd, unsigned cmd, void *arg) -{ - if (cmd == TEA6420_SWITCH) { - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct tea6420_multiplex *a = (struct tea6420_multiplex *)arg; - - return tea6420_switch(client, a->in, a->out, a->gain); - } - return -ENOIOCTLCMD; -} - -static int tea6420_command(struct i2c_client *client, unsigned cmd, void *arg) -{ - return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg); -} - -/* ----------------------------------------------------------------------- */ - -static const struct v4l2_subdev_core_ops tea6420_core_ops = { - .ioctl = tea6420_ioctl, -}; - -static const struct v4l2_subdev_ops tea6420_ops = { - .core = &tea6420_core_ops, -}; - -/* this function is called by i2c_probe */ -static int tea6420_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct v4l2_subdev *sd; - int err, i; - - /* let's see whether this adapter can support what we need */ - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE)) - return -EIO; - - v4l_info(client, "chip found @ 0x%x (%s)\n", - client->addr << 1, client->adapter->name); - - /* set initial values: set "mute"-input to all outputs at gain 0 */ - err = 0; - for (i = 1; i < 5; i++) { - err += tea6420_switch(client, 6, i, 0); - } - if (err) { - v4l_dbg(1, debug, client, "could not initialize tea6420\n"); - return -ENODEV; - } - - sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); - if (sd == NULL) - return -ENOMEM; - v4l2_i2c_subdev_init(sd, client, &tea6420_ops); - return 0; -} - -static int tea6420_remove(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - - v4l2_device_unregister_subdev(sd); - kfree(sd); - return 0; -} - -static int tea6420_legacy_probe(struct i2c_adapter *adapter) -{ - /* Let's see whether this is a known adapter we can attach to. - Prevents conflicts with tvaudio.c. */ - return adapter->id == I2C_HW_SAA7146; -} - -static const struct i2c_device_id tea6420_id[] = { - { "tea6420", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tea6420_id); - -static struct v4l2_i2c_driver_data v4l2_i2c_data = { - .name = "tea6420", - .driverid = I2C_DRIVERID_TEA6420, - .command = tea6420_command, - .probe = tea6420_probe, - .remove = tea6420_remove, - .legacy_probe = tea6420_legacy_probe, - .id_table = tea6420_id, -}; |