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 const 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 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 = devm_kzalloc(&pdev->dev, 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; 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: 199 dev_err(&pdev->dev, "Failed to register: %d\n", err); 200 201 return err; 202 } 203 204 static int timbradio_remove(struct platform_device *pdev) 205 { 206 struct timbradio *tr = platform_get_drvdata(pdev); 207 208 video_unregister_device(&tr->video_dev); 209 video_device_release_empty(&tr->video_dev); 210 211 v4l2_device_unregister(&tr->v4l2_dev); 212 213 return 0; 214 } 215 216 static struct platform_driver timbradio_platform_driver = { 217 .driver = { 218 .name = DRIVER_NAME, 219 .owner = THIS_MODULE, 220 }, 221 .probe = timbradio_probe, 222 .remove = timbradio_remove, 223 }; 224 225 module_platform_driver(timbradio_platform_driver); 226 227 MODULE_DESCRIPTION("Timberdale Radio driver"); 228 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 229 MODULE_LICENSE("GPL v2"); 230 MODULE_VERSION("0.0.2"); 231 MODULE_ALIAS("platform:"DRIVER_NAME); 232