drivers/media/radio/radio-timb.c

   1 /*
   2  * radio-timb.c Timberdale FPGA Radio driver
   3  * Copyright (c) 2009 Intel Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <linux/version.h>
  20 #include <linux/io.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-device.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/slab.h>
  26 #include <linux/i2c.h>
  27 #include <media/timb_radio.h>
  28
  29 #define DRIVER_NAME "timb-radio"
  30
  31 struct timbradio {
  32         struct timb_radio_platform_data pdata;
  33         struct v4l2_subdev      *sd_tuner;
  34         struct v4l2_subdev      *sd_dsp;
  35         struct video_device     video_dev;
  36         struct v4l2_device      v4l2_dev;
  37         struct mutex            lock;
  38 };
  39
  40
  41 static int timbradio_vidioc_querycap(struct file *file, void  *priv,
  42         struct v4l2_capability *v)
  43 {
  44         strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
  45         strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
  46         snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
  47         v->version = KERNEL_VERSION(0, 0, 1);
  48         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
  49         return 0;
  50 }
  51
  52 static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
  53         struct v4l2_tuner *v)
  54 {
  55         struct timbradio *tr = video_drvdata(file);
  56         return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
  57 }
  58
  59 static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
  60         struct v4l2_tuner *v)
  61 {
  62         struct timbradio *tr = video_drvdata(file);
  63         return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
  64 }
  65
  66 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
  67         unsigned int *i)
  68 {
  69         *i = 0;
  70         return 0;
  71 }
  72
  73 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
  74         unsigned int i)
  75 {
  76         return i ? -EINVAL : 0;
  77 }
  78
  79 static int timbradio_vidioc_g_audio(struct file *file, void *priv,
  80         struct v4l2_audio *a)
  81 {
  82         a->index = 0;
  83         strlcpy(a->name, "Radio", sizeof(a->name));
  84         a->capability = V4L2_AUDCAP_STEREO;
  85         return 0;
  86 }
  87
  88 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
  89         struct v4l2_audio *a)
  90 {
  91         return a->index ? -EINVAL : 0;
  92 }
  93
  94 static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
  95         struct v4l2_frequency *f)
  96 {
  97         struct timbradio *tr = video_drvdata(file);
  98         return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
  99 }
 100
 101 static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
 102         struct v4l2_frequency *f)
 103 {
 104         struct timbradio *tr = video_drvdata(file);
 105         return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
 106 }
 107
 108 static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
 109         struct v4l2_queryctrl *qc)
 110 {
 111         struct timbradio *tr = video_drvdata(file);
 112         return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
 113 }
 114
 115 static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
 116         struct v4l2_control *ctrl)
 117 {
 118         struct timbradio *tr = video_drvdata(file);
 119         return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
 120 }
 121
 122 static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
 123         struct v4l2_control *ctrl)
 124 {
 125         struct timbradio *tr = video_drvdata(file);
 126         return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
 127 }
 128
 129 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
 130         .vidioc_querycap        = timbradio_vidioc_querycap,
 131         .vidioc_g_tuner         = timbradio_vidioc_g_tuner,
 132         .vidioc_s_tuner         = timbradio_vidioc_s_tuner,
 133         .vidioc_g_frequency     = timbradio_vidioc_g_frequency,
 134         .vidioc_s_frequency     = timbradio_vidioc_s_frequency,
 135         .vidioc_g_input         = timbradio_vidioc_g_input,
 136         .vidioc_s_input         = timbradio_vidioc_s_input,
 137         .vidioc_g_audio         = timbradio_vidioc_g_audio,
 138         .vidioc_s_audio         = timbradio_vidioc_s_audio,
 139         .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
 140         .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
 141         .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
 142 };
 143
 144 static const struct v4l2_file_operations timbradio_fops = {
 145         .owner          = THIS_MODULE,
 146         .unlocked_ioctl = video_ioctl2,
 147 };
 148
 149 static int __devinit timbradio_probe(struct platform_device *pdev)
 150 {
 151         struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
 152         struct timbradio *tr;
 153         int err;
 154
 155         if (!pdata) {
 156                 dev_err(&pdev->dev, "Platform data missing\n");
 157                 err = -EINVAL;
 158                 goto err;
 159         }
 160
 161         tr = kzalloc(sizeof(*tr), GFP_KERNEL);
 162         if (!tr) {
 163                 err = -ENOMEM;
 164                 goto err;
 165         }
 166
 167         tr->pdata = *pdata;
 168         mutex_init(&tr->lock);
 169
 170         strlcpy(tr->video_dev.name, "Timberdale Radio",
 171                 sizeof(tr->video_dev.name));
 172         tr->video_dev.fops = &timbradio_fops;
 173         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
 174         tr->video_dev.release = video_device_release_empty;
 175         tr->video_dev.minor = -1;
 176         tr->video_dev.lock = &tr->lock;
 177
 178         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
 179         err = v4l2_device_register(NULL, &tr->v4l2_dev);
 180         if (err)
 181                 goto err_v4l2_dev;
 182
 183         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
 184
 185         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
 186         if (err) {
 187                 dev_err(&pdev->dev, "Error reg video\n");
 188                 goto err_video_req;
 189         }
 190
 191         video_set_drvdata(&tr->video_dev, tr);
 192
 193         platform_set_drvdata(pdev, tr);
 194         return 0;
 195
 196 err_video_req:
 197         video_device_release_empty(&tr->video_dev);
 198         v4l2_device_unregister(&tr->v4l2_dev);
 199 err_v4l2_dev:
 200         kfree(tr);
 201 err:
 202         dev_err(&pdev->dev, "Failed to register: %d\n", err);
 203
 204         return err;
 205 }
 206
 207 static int __devexit timbradio_remove(struct platform_device *pdev)
 208 {
 209         struct timbradio *tr = platform_get_drvdata(pdev);
 210
 211         video_unregister_device(&tr->video_dev);
 212         video_device_release_empty(&tr->video_dev);
 213
 214         v4l2_device_unregister(&tr->v4l2_dev);
 215
 216         kfree(tr);
 217
 218         return 0;
 219 }
 220
 221 static struct platform_driver timbradio_platform_driver = {
 222         .driver = {
 223                 .name   = DRIVER_NAME,
 224                 .owner  = THIS_MODULE,
 225         },
 226         .probe          = timbradio_probe,
 227         .remove         = timbradio_remove,
 228 };
 229
 230 /*--------------------------------------------------------------------------*/
 231
 232 static int __init timbradio_init(void)
 233 {
 234         return platform_driver_register(&timbradio_platform_driver);
 235 }
 236
 237 static void __exit timbradio_exit(void)
 238 {
 239         platform_driver_unregister(&timbradio_platform_driver);
 240 }
 241
 242 module_init(timbradio_init);
 243 module_exit(timbradio_exit);
 244
 245 MODULE_DESCRIPTION("Timberdale Radio driver");
 246 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 247 MODULE_LICENSE("GPL v2");
 248 MODULE_ALIAS("platform:"DRIVER_NAME);