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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | // SPDX-License-Identifier: GPL-2.0-or-later /* * vp27smpx - driver version 0.0.1 * * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> * * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com> * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp> */ #include <linux/module.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/ioctl.h> #include <linux/uaccess.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> MODULE_DESCRIPTION("vp27smpx driver"); MODULE_AUTHOR("Hans Verkuil"); MODULE_LICENSE("GPL"); /* ----------------------------------------------------------------------- */ struct vp27smpx_state { struct v4l2_subdev sd; int radio; u32 audmode; }; static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct vp27smpx_state, sd); } static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode) { struct vp27smpx_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); u8 data[3] = { 0x00, 0x00, 0x04 }; switch (audmode) { case V4L2_TUNER_MODE_MONO: case V4L2_TUNER_MODE_LANG1: break; case V4L2_TUNER_MODE_STEREO: case V4L2_TUNER_MODE_LANG1_LANG2: data[1] = 0x01; break; case V4L2_TUNER_MODE_LANG2: data[1] = 0x02; break; } if (i2c_master_send(client, data, sizeof(data)) != sizeof(data)) v4l2_err(sd, "I/O error setting audmode\n"); else state->audmode = audmode; } static int vp27smpx_s_radio(struct v4l2_subdev *sd) { struct vp27smpx_state *state = to_state(sd); state->radio = 1; return 0; } static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) { struct vp27smpx_state *state = to_state(sd); state->radio = 0; return 0; } static int vp27smpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt) { struct vp27smpx_state *state = to_state(sd); if (!state->radio) vp27smpx_set_audmode(sd, vt->audmode); return 0; } static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) { struct vp27smpx_state *state = to_state(sd); if (state->radio) return 0; vt->audmode = state->audmode; vt->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2; vt->rxsubchans = V4L2_TUNER_SUB_MONO; return 0; } static int vp27smpx_log_status(struct v4l2_subdev *sd) { struct vp27smpx_state *state = to_state(sd); v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode, state->radio ? " (Radio)" : ""); return 0; } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops vp27smpx_core_ops = { .log_status = vp27smpx_log_status, }; static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = { .s_radio = vp27smpx_s_radio, .s_tuner = vp27smpx_s_tuner, .g_tuner = vp27smpx_g_tuner, }; static const struct v4l2_subdev_video_ops vp27smpx_video_ops = { .s_std = vp27smpx_s_std, }; static const struct v4l2_subdev_ops vp27smpx_ops = { .core = &vp27smpx_core_ops, .tuner = &vp27smpx_tuner_ops, .video = &vp27smpx_video_ops, }; /* ----------------------------------------------------------------------- */ /* i2c implementation */ /* * Generic i2c probe * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' */ static int vp27smpx_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct vp27smpx_state *state; struct v4l2_subdev *sd; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); if (state == NULL) return -ENOMEM; sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops); state->audmode = V4L2_TUNER_MODE_STEREO; /* initialize vp27smpx */ vp27smpx_set_audmode(sd, state->audmode); return 0; } static int vp27smpx_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); return 0; } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id vp27smpx_id[] = { { "vp27smpx", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, vp27smpx_id); static struct i2c_driver vp27smpx_driver = { .driver = { .name = "vp27smpx", }, .probe = vp27smpx_probe, .remove = vp27smpx_remove, .id_table = vp27smpx_id, }; module_i2c_driver(vp27smpx_driver); |