![Hans Verkuil](/assets/img/avatar_default.png)
Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
215 lines
5.5 KiB
C
215 lines
5.5 KiB
C
/*
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* vp27smpx - driver version 0.0.1
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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*
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* Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com>
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* and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp>
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*
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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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*
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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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*
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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/types.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv.h>
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MODULE_DESCRIPTION("vp27smpx driver");
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MODULE_AUTHOR("Hans Verkuil");
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MODULE_LICENSE("GPL");
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/* ----------------------------------------------------------------------- */
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struct vp27smpx_state {
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struct v4l2_subdev sd;
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int radio;
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u32 audmode;
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};
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static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct vp27smpx_state, sd);
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}
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static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode)
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{
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struct vp27smpx_state *state = to_state(sd);
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 data[3] = { 0x00, 0x00, 0x04 };
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switch (audmode) {
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case V4L2_TUNER_MODE_MONO:
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case V4L2_TUNER_MODE_LANG1:
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break;
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case V4L2_TUNER_MODE_STEREO:
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case V4L2_TUNER_MODE_LANG1_LANG2:
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data[1] = 0x01;
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break;
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case V4L2_TUNER_MODE_LANG2:
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data[1] = 0x02;
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break;
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}
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if (i2c_master_send(client, data, sizeof(data)) != sizeof(data))
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v4l2_err(sd, "I/O error setting audmode\n");
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else
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state->audmode = audmode;
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}
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static int vp27smpx_s_radio(struct v4l2_subdev *sd)
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{
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struct vp27smpx_state *state = to_state(sd);
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state->radio = 1;
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return 0;
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}
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static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
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{
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struct vp27smpx_state *state = to_state(sd);
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state->radio = 0;
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return 0;
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}
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static int vp27smpx_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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{
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struct vp27smpx_state *state = to_state(sd);
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if (!state->radio)
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vp27smpx_set_audmode(sd, vt->audmode);
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return 0;
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}
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static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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{
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struct vp27smpx_state *state = to_state(sd);
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if (state->radio)
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return 0;
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vt->audmode = state->audmode;
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vt->capability = V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
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vt->rxsubchans = V4L2_TUNER_SUB_MONO;
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return 0;
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}
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static int vp27smpx_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_VP27SMPX, 0);
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}
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static int vp27smpx_log_status(struct v4l2_subdev *sd)
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{
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struct vp27smpx_state *state = to_state(sd);
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v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode,
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state->radio ? " (Radio)" : "");
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return 0;
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}
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static int vp27smpx_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 vp27smpx_core_ops = {
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.log_status = vp27smpx_log_status,
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.g_chip_ident = vp27smpx_g_chip_ident,
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};
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static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = {
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.s_radio = vp27smpx_s_radio,
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.s_std = vp27smpx_s_std,
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.s_tuner = vp27smpx_s_tuner,
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.g_tuner = vp27smpx_g_tuner,
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};
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static const struct v4l2_subdev_ops vp27smpx_ops = {
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.core = &vp27smpx_core_ops,
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.tuner = &vp27smpx_tuner_ops,
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};
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int vp27smpx_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct vp27smpx_state *state;
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struct v4l2_subdev *sd;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_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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state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops);
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state->audmode = V4L2_TUNER_MODE_STEREO;
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/* initialize vp27smpx */
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vp27smpx_set_audmode(sd, state->audmode);
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return 0;
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}
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static int vp27smpx_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(to_state(sd));
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id vp27smpx_id[] = {
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{ "vp27smpx", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, vp27smpx_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "vp27smpx",
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.driverid = I2C_DRIVERID_VP27SMPX,
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.command = vp27smpx_command,
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.probe = vp27smpx_probe,
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.remove = vp27smpx_remove,
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.id_table = vp27smpx_id,
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};
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