Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 1 | /* |
| 2 | * drivers/media/radio/radio-si4713.c |
| 3 | * |
| 4 | * Platform Driver for Silicon Labs Si4713 FM Radio Transmitter: |
| 5 | * |
| 6 | * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT |
| 7 | * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/i2c.h> |
| 29 | #include <linux/videodev2.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 31 | #include <media/v4l2-device.h> |
| 32 | #include <media/v4l2-common.h> |
| 33 | #include <media/v4l2-ioctl.h> |
| 34 | #include <media/radio-si4713.h> |
| 35 | |
| 36 | /* module parameters */ |
| 37 | static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */ |
| 38 | module_param(radio_nr, int, 0); |
| 39 | MODULE_PARM_DESC(radio_nr, |
| 40 | "Minor number for radio device (-1 ==> auto assign)"); |
| 41 | |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>"); |
| 44 | MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter"); |
| 45 | MODULE_VERSION("0.0.1"); |
| 46 | |
| 47 | /* Driver state struct */ |
| 48 | struct radio_si4713_device { |
| 49 | struct v4l2_device v4l2_dev; |
| 50 | struct video_device *radio_dev; |
| 51 | }; |
| 52 | |
| 53 | /* radio_si4713_fops - file operations interface */ |
| 54 | static const struct v4l2_file_operations radio_si4713_fops = { |
| 55 | .owner = THIS_MODULE, |
| 56 | .ioctl = video_ioctl2, |
| 57 | }; |
| 58 | |
| 59 | /* Video4Linux Interface */ |
| 60 | static int radio_si4713_fill_audout(struct v4l2_audioout *vao) |
| 61 | { |
| 62 | /* TODO: check presence of audio output */ |
| 63 | strlcpy(vao->name, "FM Modulator Audio Out", 32); |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | static int radio_si4713_enumaudout(struct file *file, void *priv, |
| 69 | struct v4l2_audioout *vao) |
| 70 | { |
| 71 | return radio_si4713_fill_audout(vao); |
| 72 | } |
| 73 | |
| 74 | static int radio_si4713_g_audout(struct file *file, void *priv, |
| 75 | struct v4l2_audioout *vao) |
| 76 | { |
| 77 | int rval = radio_si4713_fill_audout(vao); |
| 78 | |
| 79 | vao->index = 0; |
| 80 | |
| 81 | return rval; |
| 82 | } |
| 83 | |
| 84 | static int radio_si4713_s_audout(struct file *file, void *priv, |
| 85 | struct v4l2_audioout *vao) |
| 86 | { |
| 87 | return vao->index ? -EINVAL : 0; |
| 88 | } |
| 89 | |
| 90 | /* radio_si4713_querycap - query device capabilities */ |
| 91 | static int radio_si4713_querycap(struct file *file, void *priv, |
| 92 | struct v4l2_capability *capability) |
| 93 | { |
| 94 | struct radio_si4713_device *rsdev; |
| 95 | |
| 96 | rsdev = video_get_drvdata(video_devdata(file)); |
| 97 | |
| 98 | strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver)); |
| 99 | strlcpy(capability->card, "Silicon Labs Si4713 Modulator", |
| 100 | sizeof(capability->card)); |
| 101 | capability->capabilities = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT; |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /* radio_si4713_queryctrl - enumerate control items */ |
| 107 | static int radio_si4713_queryctrl(struct file *file, void *priv, |
| 108 | struct v4l2_queryctrl *qc) |
| 109 | { |
| 110 | /* Must be sorted from low to high control ID! */ |
| 111 | static const u32 user_ctrls[] = { |
| 112 | V4L2_CID_USER_CLASS, |
| 113 | V4L2_CID_AUDIO_MUTE, |
| 114 | 0 |
| 115 | }; |
| 116 | |
| 117 | /* Must be sorted from low to high control ID! */ |
| 118 | static const u32 fmtx_ctrls[] = { |
| 119 | V4L2_CID_FM_TX_CLASS, |
| 120 | V4L2_CID_RDS_TX_DEVIATION, |
| 121 | V4L2_CID_RDS_TX_PI, |
| 122 | V4L2_CID_RDS_TX_PTY, |
| 123 | V4L2_CID_RDS_TX_PS_NAME, |
| 124 | V4L2_CID_RDS_TX_RADIO_TEXT, |
| 125 | V4L2_CID_AUDIO_LIMITER_ENABLED, |
| 126 | V4L2_CID_AUDIO_LIMITER_RELEASE_TIME, |
| 127 | V4L2_CID_AUDIO_LIMITER_DEVIATION, |
| 128 | V4L2_CID_AUDIO_COMPRESSION_ENABLED, |
| 129 | V4L2_CID_AUDIO_COMPRESSION_GAIN, |
| 130 | V4L2_CID_AUDIO_COMPRESSION_THRESHOLD, |
| 131 | V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME, |
| 132 | V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME, |
| 133 | V4L2_CID_PILOT_TONE_ENABLED, |
| 134 | V4L2_CID_PILOT_TONE_DEVIATION, |
| 135 | V4L2_CID_PILOT_TONE_FREQUENCY, |
| 136 | V4L2_CID_TUNE_PREEMPHASIS, |
| 137 | V4L2_CID_TUNE_POWER_LEVEL, |
| 138 | V4L2_CID_TUNE_ANTENNA_CAPACITOR, |
| 139 | 0 |
| 140 | }; |
| 141 | static const u32 *ctrl_classes[] = { |
| 142 | user_ctrls, |
| 143 | fmtx_ctrls, |
| 144 | NULL |
| 145 | }; |
| 146 | struct radio_si4713_device *rsdev; |
| 147 | |
| 148 | rsdev = video_get_drvdata(video_devdata(file)); |
| 149 | |
| 150 | qc->id = v4l2_ctrl_next(ctrl_classes, qc->id); |
| 151 | if (qc->id == 0) |
| 152 | return -EINVAL; |
| 153 | |
| 154 | if (qc->id == V4L2_CID_USER_CLASS || qc->id == V4L2_CID_FM_TX_CLASS) |
| 155 | return v4l2_ctrl_query_fill(qc, 0, 0, 0, 0); |
| 156 | |
| 157 | return v4l2_device_call_until_err(&rsdev->v4l2_dev, 0, core, |
| 158 | queryctrl, qc); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * v4l2 ioctl call backs. |
| 163 | * we are just a wrapper for v4l2_sub_devs. |
| 164 | */ |
| 165 | static inline struct v4l2_device *get_v4l2_dev(struct file *file) |
| 166 | { |
| 167 | return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev; |
| 168 | } |
| 169 | |
| 170 | static int radio_si4713_g_ext_ctrls(struct file *file, void *p, |
| 171 | struct v4l2_ext_controls *vecs) |
| 172 | { |
| 173 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
| 174 | g_ext_ctrls, vecs); |
| 175 | } |
| 176 | |
| 177 | static int radio_si4713_s_ext_ctrls(struct file *file, void *p, |
| 178 | struct v4l2_ext_controls *vecs) |
| 179 | { |
| 180 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
| 181 | s_ext_ctrls, vecs); |
| 182 | } |
| 183 | |
| 184 | static int radio_si4713_g_ctrl(struct file *file, void *p, |
| 185 | struct v4l2_control *vc) |
| 186 | { |
| 187 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
| 188 | g_ctrl, vc); |
| 189 | } |
| 190 | |
| 191 | static int radio_si4713_s_ctrl(struct file *file, void *p, |
| 192 | struct v4l2_control *vc) |
| 193 | { |
| 194 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
| 195 | s_ctrl, vc); |
| 196 | } |
| 197 | |
| 198 | static int radio_si4713_g_modulator(struct file *file, void *p, |
| 199 | struct v4l2_modulator *vm) |
| 200 | { |
| 201 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
| 202 | g_modulator, vm); |
| 203 | } |
| 204 | |
| 205 | static int radio_si4713_s_modulator(struct file *file, void *p, |
| 206 | struct v4l2_modulator *vm) |
| 207 | { |
| 208 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
| 209 | s_modulator, vm); |
| 210 | } |
| 211 | |
| 212 | static int radio_si4713_g_frequency(struct file *file, void *p, |
| 213 | struct v4l2_frequency *vf) |
| 214 | { |
| 215 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
| 216 | g_frequency, vf); |
| 217 | } |
| 218 | |
| 219 | static int radio_si4713_s_frequency(struct file *file, void *p, |
| 220 | struct v4l2_frequency *vf) |
| 221 | { |
| 222 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
| 223 | s_frequency, vf); |
| 224 | } |
| 225 | |
| 226 | static long radio_si4713_default(struct file *file, void *p, int cmd, void *arg) |
| 227 | { |
| 228 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
| 229 | ioctl, cmd, arg); |
| 230 | } |
| 231 | |
| 232 | static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = { |
| 233 | .vidioc_enumaudout = radio_si4713_enumaudout, |
| 234 | .vidioc_g_audout = radio_si4713_g_audout, |
| 235 | .vidioc_s_audout = radio_si4713_s_audout, |
| 236 | .vidioc_querycap = radio_si4713_querycap, |
| 237 | .vidioc_queryctrl = radio_si4713_queryctrl, |
| 238 | .vidioc_g_ext_ctrls = radio_si4713_g_ext_ctrls, |
| 239 | .vidioc_s_ext_ctrls = radio_si4713_s_ext_ctrls, |
| 240 | .vidioc_g_ctrl = radio_si4713_g_ctrl, |
| 241 | .vidioc_s_ctrl = radio_si4713_s_ctrl, |
| 242 | .vidioc_g_modulator = radio_si4713_g_modulator, |
| 243 | .vidioc_s_modulator = radio_si4713_s_modulator, |
| 244 | .vidioc_g_frequency = radio_si4713_g_frequency, |
| 245 | .vidioc_s_frequency = radio_si4713_s_frequency, |
| 246 | .vidioc_default = radio_si4713_default, |
| 247 | }; |
| 248 | |
| 249 | /* radio_si4713_vdev_template - video device interface */ |
| 250 | static struct video_device radio_si4713_vdev_template = { |
| 251 | .fops = &radio_si4713_fops, |
| 252 | .name = "radio-si4713", |
| 253 | .release = video_device_release, |
| 254 | .ioctl_ops = &radio_si4713_ioctl_ops, |
| 255 | }; |
| 256 | |
| 257 | /* Platform driver interface */ |
| 258 | /* radio_si4713_pdriver_probe - probe for the device */ |
| 259 | static int radio_si4713_pdriver_probe(struct platform_device *pdev) |
| 260 | { |
| 261 | struct radio_si4713_platform_data *pdata = pdev->dev.platform_data; |
| 262 | struct radio_si4713_device *rsdev; |
| 263 | struct i2c_adapter *adapter; |
| 264 | struct v4l2_subdev *sd; |
| 265 | int rval = 0; |
| 266 | |
| 267 | if (!pdata) { |
| 268 | dev_err(&pdev->dev, "Cannot proceed without platform data.\n"); |
| 269 | rval = -EINVAL; |
| 270 | goto exit; |
| 271 | } |
| 272 | |
| 273 | rsdev = kzalloc(sizeof *rsdev, GFP_KERNEL); |
| 274 | if (!rsdev) { |
| 275 | dev_err(&pdev->dev, "Failed to alloc video device.\n"); |
| 276 | rval = -ENOMEM; |
| 277 | goto exit; |
| 278 | } |
| 279 | |
| 280 | rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev); |
| 281 | if (rval) { |
| 282 | dev_err(&pdev->dev, "Failed to register v4l2 device.\n"); |
| 283 | goto free_rsdev; |
| 284 | } |
| 285 | |
| 286 | adapter = i2c_get_adapter(pdata->i2c_bus); |
| 287 | if (!adapter) { |
| 288 | dev_err(&pdev->dev, "Cannot get i2c adapter %d\n", |
| 289 | pdata->i2c_bus); |
| 290 | rval = -ENODEV; |
| 291 | goto unregister_v4l2_dev; |
| 292 | } |
| 293 | |
| 294 | sd = v4l2_i2c_new_subdev_board(&rsdev->v4l2_dev, adapter, "si4713_i2c", |
| 295 | pdata->subdev_board_info, NULL); |
| 296 | if (!sd) { |
| 297 | dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n"); |
| 298 | rval = -ENODEV; |
| 299 | goto unregister_v4l2_dev; |
| 300 | } |
| 301 | |
| 302 | rsdev->radio_dev = video_device_alloc(); |
| 303 | if (!rsdev->radio_dev) { |
| 304 | dev_err(&pdev->dev, "Failed to alloc video device.\n"); |
| 305 | rval = -ENOMEM; |
| 306 | goto unregister_v4l2_dev; |
| 307 | } |
| 308 | |
| 309 | memcpy(rsdev->radio_dev, &radio_si4713_vdev_template, |
| 310 | sizeof(radio_si4713_vdev_template)); |
| 311 | video_set_drvdata(rsdev->radio_dev, rsdev); |
| 312 | if (video_register_device(rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) { |
| 313 | dev_err(&pdev->dev, "Could not register video device.\n"); |
| 314 | rval = -EIO; |
| 315 | goto free_vdev; |
| 316 | } |
| 317 | dev_info(&pdev->dev, "New device successfully probed\n"); |
| 318 | |
| 319 | goto exit; |
| 320 | |
| 321 | free_vdev: |
| 322 | video_device_release(rsdev->radio_dev); |
| 323 | unregister_v4l2_dev: |
| 324 | v4l2_device_unregister(&rsdev->v4l2_dev); |
| 325 | free_rsdev: |
| 326 | kfree(rsdev); |
| 327 | exit: |
| 328 | return rval; |
| 329 | } |
| 330 | |
| 331 | /* radio_si4713_pdriver_remove - remove the device */ |
| 332 | static int __exit radio_si4713_pdriver_remove(struct platform_device *pdev) |
| 333 | { |
| 334 | struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); |
| 335 | struct radio_si4713_device *rsdev = container_of(v4l2_dev, |
| 336 | struct radio_si4713_device, |
| 337 | v4l2_dev); |
| 338 | |
| 339 | video_unregister_device(rsdev->radio_dev); |
| 340 | v4l2_device_unregister(&rsdev->v4l2_dev); |
| 341 | kfree(rsdev); |
| 342 | |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | static struct platform_driver radio_si4713_pdriver = { |
| 347 | .driver = { |
| 348 | .name = "radio-si4713", |
| 349 | }, |
| 350 | .probe = radio_si4713_pdriver_probe, |
| 351 | .remove = __exit_p(radio_si4713_pdriver_remove), |
| 352 | }; |
| 353 | |
| 354 | /* Module Interface */ |
| 355 | static int __init radio_si4713_module_init(void) |
| 356 | { |
| 357 | return platform_driver_register(&radio_si4713_pdriver); |
| 358 | } |
| 359 | |
| 360 | static void __exit radio_si4713_module_exit(void) |
| 361 | { |
| 362 | platform_driver_unregister(&radio_si4713_pdriver); |
| 363 | } |
| 364 | |
| 365 | module_init(radio_si4713_module_init); |
| 366 | module_exit(radio_si4713_module_exit); |
| 367 | |