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/io.h>
  20 #include <media/v4l2-ioctl.h>
  21 #include <media/v4l2-device.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/slab.h>
  25 #include <linux/i2c.h>
  26 #include <linux/module.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->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
  48         return 0;
  49 }
  50
  51 static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
  52         struct v4l2_tuner *v)
  53 {
  54         struct timbradio *tr = video_drvdata(file);
  55         return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
  56 }
  57
  58 static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
  59         struct v4l2_tuner *v)
  60 {
  61         struct timbradio *tr = video_drvdata(file);
  62         return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
  63 }
  64
  65 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
  66         unsigned int *i)
  67 {
  68         *i = 0;
  69         return 0;
  70 }
  71
  72 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
  73         unsigned int i)
  74 {
  75         return i ? -EINVAL : 0;
  76 }
  77
  78 static int timbradio_vidioc_g_audio(struct file *file, void *priv,
  79         struct v4l2_audio *a)
  80 {
  81         a->index = 0;
  82         strlcpy(a->name, "Radio", sizeof(a->name));
  83         a->capability = V4L2_AUDCAP_STEREO;
  84         return 0;
  85 }
  86
  87 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
  88         struct v4l2_audio *a)
  89 {
  90         return a->index ? -EINVAL : 0;
  91 }
  92
  93 static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
  94         struct v4l2_frequency *f)
  95 {
  96         struct timbradio *tr = video_drvdata(file);
  97         return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
  98 }
  99
 100 static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
 101         struct v4l2_frequency *f)
 102 {
 103         struct timbradio *tr = video_drvdata(file);
 104         return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
 105 }
 106
 107 static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
 108         struct v4l2_queryctrl *qc)
 109 {
 110         struct timbradio *tr = video_drvdata(file);
 111         return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
 112 }
 113
 114 static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
 115         struct v4l2_control *ctrl)
 116 {
 117         struct timbradio *tr = video_drvdata(file);
 118         return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
 119 }
 120
 121 static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
 122         struct v4l2_control *ctrl)
 123 {
 124         struct timbradio *tr = video_drvdata(file);
 125         return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
 126 }
 127
 128 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
 129         .vidioc_querycap        = timbradio_vidioc_querycap,
 130         .vidioc_g_tuner         = timbradio_vidioc_g_tuner,
 131         .vidioc_s_tuner         = timbradio_vidioc_s_tuner,
 132         .vidioc_g_frequency     = timbradio_vidioc_g_frequency,
 133         .vidioc_s_frequency     = timbradio_vidioc_s_frequency,
 134         .vidioc_g_input         = timbradio_vidioc_g_input,
 135         .vidioc_s_input         = timbradio_vidioc_s_input,
 136         .vidioc_g_audio         = timbradio_vidioc_g_audio,
 137         .vidioc_s_audio         = timbradio_vidioc_s_audio,
 138         .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
 139         .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
 140         .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
 141 };
 142
 143 static const struct v4l2_file_operations timbradio_fops = {
 144         .owner          = THIS_MODULE,
 145         .unlocked_ioctl = video_ioctl2,
 146 };
 147
 148 static int __devinit timbradio_probe(struct platform_device *pdev)
 149 {
 150         struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
 151         struct timbradio *tr;
 152         int err;
 153
 154         if (!pdata) {
 155                 dev_err(&pdev->dev, "Platform data missing\n");
 156                 err = -EINVAL;
 157                 goto err;
 158         }
 159
 160         tr = kzalloc(sizeof(*tr), GFP_KERNEL);
 161         if (!tr) {
 162                 err = -ENOMEM;
 163                 goto err;
 164         }
 165
 166         tr->pdata = *pdata;
 167         mutex_init(&tr->lock);
 168
 169         strlcpy(tr->video_dev.name, "Timberdale Radio",
 170                 sizeof(tr->video_dev.name));
 171         tr->video_dev.fops = &timbradio_fops;
 172         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
 173         tr->video_dev.release = video_device_release_empty;
 174         tr->video_dev.minor = -1;
 175         tr->video_dev.lock = &tr->lock;
 176
 177         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
 178         err = v4l2_device_register(NULL, &tr->v4l2_dev);
 179         if (err)
 180                 goto err_v4l2_dev;
 181
 182         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
 183
 184         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
 185         if (err) {
 186                 dev_err(&pdev->dev, "Error reg video\n");
 187                 goto err_video_req;
 188         }
 189
 190         video_set_drvdata(&tr->video_dev, tr);
 191
 192         platform_set_drvdata(pdev, tr);
 193         return 0;
 194
 195 err_video_req:
 196         video_device_release_empty(&tr->video_dev);
 197         v4l2_device_unregister(&tr->v4l2_dev);
 198 err_v4l2_dev:
 199         kfree(tr);
 200 err:
 201         dev_err(&pdev->dev, "Failed to register: %d\n", err);
 202
 203         return err;
 204 }
 205
 206 static int __devexit timbradio_remove(struct platform_device *pdev)
 207 {
 208         struct timbradio *tr = platform_get_drvdata(pdev);
 209
 210         video_unregister_device(&tr->video_dev);
 211         video_device_release_empty(&tr->video_dev);
 212
 213         v4l2_device_unregister(&tr->v4l2_dev);
 214
 215         kfree(tr);
 216
 217         return 0;
 218 }
 219
 220 static struct platform_driver timbradio_platform_driver = {
 221         .driver = {
 222                 .name   = DRIVER_NAME,
 223                 .owner  = THIS_MODULE,
 224         },
 225         .probe          = timbradio_probe,
 226         .remove         = timbradio_remove,
 227 };
 228
 229 module_platform_driver(timbradio_platform_driver);
 230
 231 MODULE_DESCRIPTION("Timberdale Radio driver");
 232 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 233 MODULE_LICENSE("GPL v2");
 234 MODULE_VERSION("0.0.2");
 235 MODULE_ALIAS("platform:"DRIVER_NAME);