069b747931
Since internal to v4l2 the ioctl prototype is the same regardless of it being called through .ioctl or .unlocked_ioctl, we need to convert it all to the long return type of unlocked_ioctl. Thanks to Jean-Francois Moine for posting an initial patch for this and thus bringing it to our attention. Cc: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
271 lines
6.9 KiB
C
271 lines
6.9 KiB
C
/*
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tda9840 - i2c-driver for the tda9840 by SGS Thomson
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Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
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Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
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The tda9840 is a stereo/dual sound processor with digital
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identification. It can be found at address 0x84 on the i2c-bus.
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For detailed informations download the specifications directly
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from SGS Thomson at http://www.st.com
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/ioctl.h>
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#include <linux/i2c.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-i2c-drv-legacy.h>
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#include "tda9840.h"
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MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
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MODULE_DESCRIPTION("tda9840 driver");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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#define SWITCH 0x00
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#define LEVEL_ADJUST 0x02
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#define STEREO_ADJUST 0x03
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#define TEST 0x04
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#define TDA9840_SET_MUTE 0x00
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#define TDA9840_SET_MONO 0x10
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#define TDA9840_SET_STEREO 0x2a
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#define TDA9840_SET_LANG1 0x12
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#define TDA9840_SET_LANG2 0x1e
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#define TDA9840_SET_BOTH 0x1a
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#define TDA9840_SET_BOTH_R 0x16
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#define TDA9840_SET_EXTERNAL 0x7a
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/* addresses to scan, found only at 0x42 (7-Bit) */
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static unsigned short normal_i2c[] = { I2C_ADDR_TDA9840, I2C_CLIENT_END };
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/* magic definition of all other variables and things */
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I2C_CLIENT_INSMOD;
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static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (i2c_smbus_write_byte_data(client, reg, val))
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v4l2_dbg(1, debug, sd, "error writing %02x to %02x\n",
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val, reg);
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}
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static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
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{
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int byte;
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if (t->index)
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return -EINVAL;
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switch (t->audmode) {
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case V4L2_TUNER_MODE_STEREO:
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byte = TDA9840_SET_STEREO;
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break;
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case V4L2_TUNER_MODE_LANG1_LANG2:
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byte = TDA9840_SET_BOTH;
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break;
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case V4L2_TUNER_MODE_LANG1:
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byte = TDA9840_SET_LANG1;
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break;
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case V4L2_TUNER_MODE_LANG2:
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byte = TDA9840_SET_LANG2;
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break;
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default:
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byte = TDA9840_SET_MONO;
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break;
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}
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v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte);
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tda9840_write(sd, SWITCH, byte);
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return 0;
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}
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static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 byte;
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t->rxsubchans = V4L2_TUNER_SUB_MONO;
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if (1 != i2c_master_recv(client, &byte, 1)) {
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v4l2_dbg(1, debug, sd,
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"i2c_master_recv() failed\n");
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return -EIO;
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}
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if (byte & 0x80) {
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v4l2_dbg(1, debug, sd,
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"TDA9840_DETECT: register contents invalid\n");
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return -EINVAL;
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}
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v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte);
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switch (byte & 0x60) {
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case 0x00:
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t->rxsubchans = V4L2_TUNER_SUB_MONO;
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break;
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case 0x20:
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t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
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break;
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case 0x40:
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t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
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break;
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default: /* Incorrect detect */
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t->rxsubchans = V4L2_TUNER_MODE_MONO;
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break;
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}
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return 0;
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}
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static long tda9840_ioctl(struct v4l2_subdev *sd, unsigned cmd, void *arg)
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{
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int byte;
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switch (cmd) {
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case TDA9840_LEVEL_ADJUST:
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byte = *(int *)arg;
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v4l2_dbg(1, debug, sd, "TDA9840_LEVEL_ADJUST: %d\n", byte);
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/* check for correct range */
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if (byte > 25 || byte < -20)
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return -EINVAL;
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/* calculate actual value to set, see specs, page 18 */
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byte /= 5;
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if (0 < byte)
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byte += 0x8;
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else
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byte = -byte;
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tda9840_write(sd, LEVEL_ADJUST, byte);
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break;
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case TDA9840_STEREO_ADJUST:
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byte = *(int *)arg;
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v4l2_dbg(1, debug, sd, "TDA9840_STEREO_ADJUST: %d\n", byte);
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/* check for correct range */
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if (byte > 25 || byte < -24)
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return -EINVAL;
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/* calculate actual value to set */
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byte /= 5;
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if (0 < byte)
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byte += 0x20;
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else
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byte = -byte;
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tda9840_write(sd, STEREO_ADJUST, byte);
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break;
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default:
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return -ENOIOCTLCMD;
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}
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return 0;
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}
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static int tda9840_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops tda9840_core_ops = {
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.ioctl = tda9840_ioctl,
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};
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static const struct v4l2_subdev_tuner_ops tda9840_tuner_ops = {
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.s_tuner = tda9840_s_tuner,
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.g_tuner = tda9840_g_tuner,
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};
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static const struct v4l2_subdev_ops tda9840_ops = {
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.core = &tda9840_core_ops,
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.tuner = &tda9840_tuner_ops,
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};
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/* ----------------------------------------------------------------------- */
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static int tda9840_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct v4l2_subdev *sd;
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int result;
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int byte;
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/* let's see whether this adapter can support what we need */
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA |
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I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
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if (sd == NULL)
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return -ENOMEM;
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v4l2_i2c_subdev_init(sd, client, &tda9840_ops);
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/* set initial values for level & stereo - adjustment, mode */
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byte = 0;
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result = tda9840_ioctl(sd, TDA9840_LEVEL_ADJUST, &byte);
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result |= tda9840_ioctl(sd, TDA9840_STEREO_ADJUST, &byte);
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tda9840_write(sd, SWITCH, TDA9840_SET_STEREO);
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if (result) {
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v4l2_dbg(1, debug, sd, "could not initialize tda9840\n");
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kfree(sd);
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return -ENODEV;
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}
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return 0;
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}
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static int tda9840_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(sd);
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return 0;
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}
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static int tda9840_legacy_probe(struct i2c_adapter *adapter)
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{
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/* Let's see whether this is a known adapter we can attach to.
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Prevents conflicts with tvaudio.c. */
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return adapter->id == I2C_HW_SAA7146;
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}
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static const struct i2c_device_id tda9840_id[] = {
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{ "tda9840", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tda9840_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "tda9840",
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.driverid = I2C_DRIVERID_TDA9840,
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.command = tda9840_command,
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.probe = tda9840_probe,
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.remove = tda9840_remove,
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.legacy_probe = tda9840_legacy_probe,
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.id_table = tda9840_id,
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};
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