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/mfd/core.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/slab.h>
  27 #include <linux/i2c.h>
  28 #include <media/timb_radio.h>
  29
  30 #define DRIVER_NAME "timb-radio"
  31
  32 struct timbradio {
  33         struct timb_radio_platform_data pdata;
  34         struct v4l2_subdev      *sd_tuner;
  35         struct v4l2_subdev      *sd_dsp;
  36         struct video_device     video_dev;
  37         struct v4l2_device      v4l2_dev;
  38         struct mutex            lock;
  39 };
  40
  41
  42 static int timbradio_vidioc_querycap(struct file *file, void  *priv,
  43         struct v4l2_capability *v)
  44 {
  45         strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
  46         strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
  47         snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
  48         v->version = KERNEL_VERSION(0, 0, 1);
  49         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
  50         return 0;
  51 }
  52
  53 static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
  54         struct v4l2_tuner *v)
  55 {
  56         struct timbradio *tr = video_drvdata(file);
  57         return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
  58 }
  59
  60 static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
  61         struct v4l2_tuner *v)
  62 {
  63         struct timbradio *tr = video_drvdata(file);
  64         return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
  65 }
  66
  67 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
  68         unsigned int *i)
  69 {
  70         *i = 0;
  71         return 0;
  72 }
  73
  74 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
  75         unsigned int i)
  76 {
  77         return i ? -EINVAL : 0;
  78 }
  79
  80 static int timbradio_vidioc_g_audio(struct file *file, void *priv,
  81         struct v4l2_audio *a)
  82 {
  83         a->index = 0;
  84         strlcpy(a->name, "Radio", sizeof(a->name));
  85         a->capability = V4L2_AUDCAP_STEREO;
  86         return 0;
  87 }
  88
  89 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
  90         struct v4l2_audio *a)
  91 {
  92         return a->index ? -EINVAL : 0;
  93 }
  94
  95 static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
  96         struct v4l2_frequency *f)
  97 {
  98         struct timbradio *tr = video_drvdata(file);
  99         return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
 100 }
 101
 102 static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
 103         struct v4l2_frequency *f)
 104 {
 105         struct timbradio *tr = video_drvdata(file);
 106         return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
 107 }
 108
 109 static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
 110         struct v4l2_queryctrl *qc)
 111 {
 112         struct timbradio *tr = video_drvdata(file);
 113         return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
 114 }
 115
 116 static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
 117         struct v4l2_control *ctrl)
 118 {
 119         struct timbradio *tr = video_drvdata(file);
 120         return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
 121 }
 122
 123 static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
 124         struct v4l2_control *ctrl)
 125 {
 126         struct timbradio *tr = video_drvdata(file);
 127         return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
 128 }
 129
 130 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
 131         .vidioc_querycap        = timbradio_vidioc_querycap,
 132         .vidioc_g_tuner         = timbradio_vidioc_g_tuner,
 133         .vidioc_s_tuner         = timbradio_vidioc_s_tuner,
 134         .vidioc_g_frequency     = timbradio_vidioc_g_frequency,
 135         .vidioc_s_frequency     = timbradio_vidioc_s_frequency,
 136         .vidioc_g_input         = timbradio_vidioc_g_input,
 137         .vidioc_s_input         = timbradio_vidioc_s_input,
 138         .vidioc_g_audio         = timbradio_vidioc_g_audio,
 139         .vidioc_s_audio         = timbradio_vidioc_s_audio,
 140         .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
 141         .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
 142         .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
 143 };
 144
 145 static const struct v4l2_file_operations timbradio_fops = {
 146         .owner          = THIS_MODULE,
 147         .unlocked_ioctl = video_ioctl2,
 148 };
 149
 150 static int __devinit timbradio_probe(struct platform_device *pdev)
 151 {
 152         struct timb_radio_platform_data *pdata = mfd_get_data(pdev);
 153         struct timbradio *tr;
 154         int err;
 155
 156         if (!pdata) {
 157                 dev_err(&pdev->dev, "Platform data missing\n");
 158                 err = -EINVAL;
 159                 goto err;
 160         }
 161
 162         tr = kzalloc(sizeof(*tr), GFP_KERNEL);
 163         if (!tr) {
 164                 err = -ENOMEM;
 165                 goto err;
 166         }
 167
 168         tr->pdata = *pdata;
 169         mutex_init(&tr->lock);
 170
 171         strlcpy(tr->video_dev.name, "Timberdale Radio",
 172                 sizeof(tr->video_dev.name));
 173         tr->video_dev.fops = &timbradio_fops;
 174         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
 175         tr->video_dev.release = video_device_release_empty;
 176         tr->video_dev.minor = -1;
 177         tr->video_dev.lock = &tr->lock;
 178
 179         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
 180         err = v4l2_device_register(NULL, &tr->v4l2_dev);
 181         if (err)
 182                 goto err_v4l2_dev;
 183
 184         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
 185
 186         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
 187         if (err) {
 188                 dev_err(&pdev->dev, "Error reg video\n");
 189                 goto err_video_req;
 190         }
 191
 192         video_set_drvdata(&tr->video_dev, tr);
 193
 194         platform_set_drvdata(pdev, tr);
 195         return 0;
 196
 197 err_video_req:
 198         video_device_release_empty(&tr->video_dev);
 199         v4l2_device_unregister(&tr->v4l2_dev);
 200 err_v4l2_dev:
 201         kfree(tr);
 202 err:
 203         dev_err(&pdev->dev, "Failed to register: %d\n", err);
 204
 205         return err;
 206 }
 207
 208 static int __devexit timbradio_remove(struct platform_device *pdev)
 209 {
 210         struct timbradio *tr = platform_get_drvdata(pdev);
 211
 212         video_unregister_device(&tr->video_dev);
 213         video_device_release_empty(&tr->video_dev);
 214
 215         v4l2_device_unregister(&tr->v4l2_dev);
 216
 217         kfree(tr);
 218
 219         return 0;
 220 }
 221
 222 static struct platform_driver timbradio_platform_driver = {
 223         .driver = {
 224                 .name   = DRIVER_NAME,
 225                 .owner  = THIS_MODULE,
 226         },
 227         .probe          = timbradio_probe,
 228         .remove         = timbradio_remove,
 229 };
 230
 231 /*--------------------------------------------------------------------------*/
 232
 233 static int __init timbradio_init(void)
 234 {
 235         return platform_driver_register(&timbradio_platform_driver);
 236 }
 237
 238 static void __exit timbradio_exit(void)
 239 {
 240         platform_driver_unregister(&timbradio_platform_driver);
 241 }
 242
 243 module_init(timbradio_init);
 244 module_exit(timbradio_exit);
 245
 246 MODULE_DESCRIPTION("Timberdale Radio driver");
 247 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 248 MODULE_LICENSE("GPL v2");
 249 MODULE_ALIAS("platform:"DRIVER_NAME);