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191 lines
4.4 KiB
191 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* vp27smpx - driver version 0.0.1 |
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* |
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* Copyright (C) 2007 Hans Verkuil <[email protected]> |
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* |
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* Based on a tvaudio patch from Takahiro Adachi <[email protected]> |
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* and Kazuhiko Kawakami <[email protected]> |
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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/slab.h> |
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#include <linux/ioctl.h> |
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#include <linux/uaccess.h> |
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#include <linux/i2c.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.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, const 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_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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/* ----------------------------------------------------------------------- */ |
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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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}; |
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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_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_video_ops vp27smpx_video_ops = { |
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.s_std = vp27smpx_s_std, |
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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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.video = &vp27smpx_video_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 = devm_kzalloc(&client->dev, sizeof(*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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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 i2c_driver vp27smpx_driver = { |
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.driver = { |
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.name = "vp27smpx", |
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}, |
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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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module_i2c_driver(vp27smpx_driver);
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