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/i2c.h>
  26 #include <media/timb_radio.h>
  27
  28 #define DRIVER_NAME "timb-radio"
  29
  30 struct timbradio {
  31         struct timb_radio_platform_data pdata;
  32         struct v4l2_subdev      *sd_tuner;
  33         struct v4l2_subdev      *sd_dsp;
  34         struct video_device     video_dev;
  35         struct v4l2_device      v4l2_dev;
  36 };
  37
  38
  39 static int timbradio_vidioc_querycap(struct file *file, void  *priv,
  40         struct v4l2_capability *v)
  41 {
  42         strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
  43         strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
  44         snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
  45         v->version = KERNEL_VERSION(0, 0, 1);
  46         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
  47         return 0;
  48 }
  49
  50 static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
  51         struct v4l2_tuner *v)
  52 {
  53         struct timbradio *tr = video_drvdata(file);
  54         return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
  55 }
  56
  57 static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
  58         struct v4l2_tuner *v)
  59 {
  60         struct timbradio *tr = video_drvdata(file);
  61         return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
  62 }
  63
  64 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
  65         unsigned int *i)
  66 {
  67         *i = 0;
  68         return 0;
  69 }
  70
  71 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
  72         unsigned int i)
  73 {
  74         return i ? -EINVAL : 0;
  75 }
  76
  77 static int timbradio_vidioc_g_audio(struct file *file, void *priv,
  78         struct v4l2_audio *a)
  79 {
  80         a->index = 0;
  81         strlcpy(a->name, "Radio", sizeof(a->name));
  82         a->capability = V4L2_AUDCAP_STEREO;
  83         return 0;
  84 }
  85
  86 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
  87         struct v4l2_audio *a)
  88 {
  89         return a->index ? -EINVAL : 0;
  90 }
  91
  92 static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
  93         struct v4l2_frequency *f)
  94 {
  95         struct timbradio *tr = video_drvdata(file);
  96         return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
  97 }
  98
  99 static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
 100         struct v4l2_frequency *f)
 101 {
 102         struct timbradio *tr = video_drvdata(file);
 103         return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
 104 }
 105
 106 static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
 107         struct v4l2_queryctrl *qc)
 108 {
 109         struct timbradio *tr = video_drvdata(file);
 110         return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
 111 }
 112
 113 static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
 114         struct v4l2_control *ctrl)
 115 {
 116         struct timbradio *tr = video_drvdata(file);
 117         return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
 118 }
 119
 120 static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
 121         struct v4l2_control *ctrl)
 122 {
 123         struct timbradio *tr = video_drvdata(file);
 124         return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
 125 }
 126
 127 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
 128         .vidioc_querycap        = timbradio_vidioc_querycap,
 129         .vidioc_g_tuner         = timbradio_vidioc_g_tuner,
 130         .vidioc_s_tuner         = timbradio_vidioc_s_tuner,
 131         .vidioc_g_frequency     = timbradio_vidioc_g_frequency,
 132         .vidioc_s_frequency     = timbradio_vidioc_s_frequency,
 133         .vidioc_g_input         = timbradio_vidioc_g_input,
 134         .vidioc_s_input         = timbradio_vidioc_s_input,
 135         .vidioc_g_audio         = timbradio_vidioc_g_audio,
 136         .vidioc_s_audio         = timbradio_vidioc_s_audio,
 137         .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
 138         .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
 139         .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
 140 };
 141
 142 static const struct v4l2_file_operations timbradio_fops = {
 143         .owner          = THIS_MODULE,
 144         .ioctl          = video_ioctl2,
 145 };
 146
 147 static int __devinit timbradio_probe(struct platform_device *pdev)
 148 {
 149         struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
 150         struct timbradio *tr;
 151         int err;
 152
 153         if (!pdata) {
 154                 dev_err(&pdev->dev, "Platform data missing\n");
 155                 err = -EINVAL;
 156                 goto err;
 157         }
 158
 159         tr = kzalloc(sizeof(*tr), GFP_KERNEL);
 160         if (!tr) {
 161                 err = -ENOMEM;
 162                 goto err;
 163         }
 164
 165         tr->pdata = *pdata;
 166
 167         strlcpy(tr->video_dev.name, "Timberdale Radio",
 168                 sizeof(tr->video_dev.name));
 169         tr->video_dev.fops = &timbradio_fops;
 170         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
 171         tr->video_dev.release = video_device_release_empty;
 172         tr->video_dev.minor = -1;
 173
 174         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
 175         err = v4l2_device_register(NULL, &tr->v4l2_dev);
 176         if (err)
 177                 goto err_v4l2_dev;
 178
 179         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
 180
 181         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
 182         if (err) {
 183                 dev_err(&pdev->dev, "Error reg video\n");
 184                 goto err_video_req;
 185         }
 186
 187         video_set_drvdata(&tr->video_dev, tr);
 188
 189         platform_set_drvdata(pdev, tr);
 190         return 0;
 191
 192 err_video_req:
 193         video_device_release_empty(&tr->video_dev);
 194         v4l2_device_unregister(&tr->v4l2_dev);
 195 err_v4l2_dev:
 196         kfree(tr);
 197 err:
 198         dev_err(&pdev->dev, "Failed to register: %d\n", err);
 199
 200         return err;
 201 }
 202
 203 static int __devexit timbradio_remove(struct platform_device *pdev)
 204 {
 205         struct timbradio *tr = platform_get_drvdata(pdev);
 206
 207         video_unregister_device(&tr->video_dev);
 208         video_device_release_empty(&tr->video_dev);
 209
 210         v4l2_device_unregister(&tr->v4l2_dev);
 211
 212         kfree(tr);
 213
 214         return 0;
 215 }
 216
 217 static struct platform_driver timbradio_platform_driver = {
 218         .driver = {
 219                 .name   = DRIVER_NAME,
 220                 .owner  = THIS_MODULE,
 221         },
 222         .probe          = timbradio_probe,
 223         .remove         = timbradio_remove,
 224 };
 225
 226 /*--------------------------------------------------------------------------*/
 227
 228 static int __init timbradio_init(void)
 229 {
 230         return platform_driver_register(&timbradio_platform_driver);
 231 }
 232
 233 static void __exit timbradio_exit(void)
 234 {
 235         platform_driver_unregister(&timbradio_platform_driver);
 236 }
 237
 238 module_init(timbradio_init);
 239 module_exit(timbradio_exit);
 240
 241 MODULE_DESCRIPTION("Timberdale Radio driver");
 242 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 243 MODULE_LICENSE("GPL v2");
 244 MODULE_ALIAS("platform:"DRIVER_NAME);