diff options
Diffstat (limited to 'drivers/media/video/tda9840.c')
| -rw-r--r-- | drivers/media/video/tda9840.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/drivers/media/video/tda9840.c b/drivers/media/video/tda9840.c deleted file mode 100644 index 3d7ddd93282d..000000000000 --- a/drivers/media/video/tda9840.c +++ /dev/null @@ -1,224 +0,0 @@ - /* - tda9840 - i2c-driver for the tda9840 by SGS Thomson - - Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> - Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> - - The tda9840 is a stereo/dual sound processor with digital - identification. It can be found at address 0x84 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/slab.h> -#include <linux/i2c.h> -#include <media/v4l2-device.h> -#include <media/v4l2-chip-ident.h> - -MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); -MODULE_DESCRIPTION("tda9840 driver"); -MODULE_LICENSE("GPL"); - -static int debug; -module_param(debug, int, 0644); - -MODULE_PARM_DESC(debug, "Debug level (0-1)"); - -#define SWITCH 0x00 -#define LEVEL_ADJUST 0x02 -#define STEREO_ADJUST 0x03 -#define TEST 0x04 - -#define TDA9840_SET_MUTE 0x00 -#define TDA9840_SET_MONO 0x10 -#define TDA9840_SET_STEREO 0x2a -#define TDA9840_SET_LANG1 0x12 -#define TDA9840_SET_LANG2 0x1e -#define TDA9840_SET_BOTH 0x1a -#define TDA9840_SET_BOTH_R 0x16 -#define TDA9840_SET_EXTERNAL 0x7a - - -static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - if (i2c_smbus_write_byte_data(client, reg, val)) - v4l2_dbg(1, debug, sd, "error writing %02x to %02x\n", - val, reg); -} - -static int tda9840_status(struct v4l2_subdev *sd) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - u8 byte; - - if (1 != i2c_master_recv(client, &byte, 1)) { - v4l2_dbg(1, debug, sd, - "i2c_master_recv() failed\n"); - return -EIO; - } - - if (byte & 0x80) { - v4l2_dbg(1, debug, sd, - "TDA9840_DETECT: register contents invalid\n"); - return -EINVAL; - } - - v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte); - return byte & 0x60; -} - -static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t) -{ - int stat = tda9840_status(sd); - int byte; - - if (t->index) - return -EINVAL; - - stat = stat < 0 ? 0 : stat; - if (stat == 0 || stat == 0x60) /* mono input */ - byte = TDA9840_SET_MONO; - else if (stat == 0x40) /* stereo input */ - byte = (t->audmode == V4L2_TUNER_MODE_MONO) ? - TDA9840_SET_MONO : TDA9840_SET_STEREO; - else { /* bilingual */ - switch (t->audmode) { - case V4L2_TUNER_MODE_LANG1_LANG2: - byte = TDA9840_SET_BOTH; - break; - case V4L2_TUNER_MODE_LANG2: - byte = TDA9840_SET_LANG2; - break; - default: - byte = TDA9840_SET_LANG1; - break; - } - } - v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte); - tda9840_write(sd, SWITCH, byte); - return 0; -} - -static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t) -{ - int stat = tda9840_status(sd); - - if (stat < 0) - return stat; - - t->rxsubchans = V4L2_TUNER_SUB_MONO; - - switch (stat & 0x60) { - case 0x00: - t->rxsubchans = V4L2_TUNER_SUB_MONO; - break; - case 0x20: - t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2; - break; - case 0x40: - t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO; - break; - default: /* Incorrect detect */ - t->rxsubchans = V4L2_TUNER_MODE_MONO; - break; - } - return 0; -} - -static int tda9840_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TDA9840, 0); -} - -/* ----------------------------------------------------------------------- */ - -static const struct v4l2_subdev_core_ops tda9840_core_ops = { - .g_chip_ident = tda9840_g_chip_ident, -}; - -static const struct v4l2_subdev_tuner_ops tda9840_tuner_ops = { - .s_tuner = tda9840_s_tuner, - .g_tuner = tda9840_g_tuner, -}; - -static const struct v4l2_subdev_ops tda9840_ops = { - .core = &tda9840_core_ops, - .tuner = &tda9840_tuner_ops, -}; - -/* ----------------------------------------------------------------------- */ - -static int tda9840_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct v4l2_subdev *sd; - - /* let's see whether this adapter can support what we need */ - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_BYTE_DATA | - I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) - return -EIO; - - v4l_info(client, "chip found @ 0x%x (%s)\n", - client->addr << 1, client->adapter->name); - - sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); - if (sd == NULL) - return -ENOMEM; - v4l2_i2c_subdev_init(sd, client, &tda9840_ops); - - /* set initial values for level & stereo - adjustment, mode */ - tda9840_write(sd, LEVEL_ADJUST, 0); - tda9840_write(sd, STEREO_ADJUST, 0); - tda9840_write(sd, SWITCH, TDA9840_SET_STEREO); - return 0; -} - -static int tda9840_remove(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - - v4l2_device_unregister_subdev(sd); - kfree(sd); - return 0; -} - -static const struct i2c_device_id tda9840_id[] = { - { "tda9840", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tda9840_id); - -static struct i2c_driver tda9840_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "tda9840", - }, - .probe = tda9840_probe, - .remove = tda9840_remove, - .id_table = tda9840_id, -}; - -module_i2c_driver(tda9840_driver); |