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 <media/v4l2-ctrls.h> 23 #include <media/v4l2-event.h> 24 #include <linux/platform_device.h> 25 #include <linux/interrupt.h> 26 #include <linux/slab.h> 27 #include <linux/i2c.h> 28 #include <linux/module.h> 29 #include <media/timb_radio.h> 30 31 #define DRIVER_NAME "timb-radio" 32 33 struct timbradio { 34 struct timb_radio_platform_data pdata; 35 struct v4l2_subdev *sd_tuner; 36 struct v4l2_subdev *sd_dsp; 37 struct video_device video_dev; 38 struct v4l2_device v4l2_dev; 39 struct mutex lock; 40 }; 41 42 43 static int timbradio_vidioc_querycap(struct file *file, void *priv, 44 struct v4l2_capability *v) 45 { 46 strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver)); 47 strlcpy(v->card, "Timberdale Radio", sizeof(v->card)); 48 snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME); 49 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 50 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; 51 return 0; 52 } 53 54 static int timbradio_vidioc_g_tuner(struct file *file, void *priv, 55 struct v4l2_tuner *v) 56 { 57 struct timbradio *tr = video_drvdata(file); 58 return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v); 59 } 60 61 static int timbradio_vidioc_s_tuner(struct file *file, void *priv, 62 const struct v4l2_tuner *v) 63 { 64 struct timbradio *tr = video_drvdata(file); 65 return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v); 66 } 67 68 static int timbradio_vidioc_s_frequency(struct file *file, void *priv, 69 const struct v4l2_frequency *f) 70 { 71 struct timbradio *tr = video_drvdata(file); 72 return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f); 73 } 74 75 static int timbradio_vidioc_g_frequency(struct file *file, void *priv, 76 struct v4l2_frequency *f) 77 { 78 struct timbradio *tr = video_drvdata(file); 79 return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f); 80 } 81 82 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = { 83 .vidioc_querycap = timbradio_vidioc_querycap, 84 .vidioc_g_tuner = timbradio_vidioc_g_tuner, 85 .vidioc_s_tuner = timbradio_vidioc_s_tuner, 86 .vidioc_g_frequency = timbradio_vidioc_g_frequency, 87 .vidioc_s_frequency = timbradio_vidioc_s_frequency, 88 .vidioc_log_status = v4l2_ctrl_log_status, 89 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 90 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 91 }; 92 93 static const struct v4l2_file_operations timbradio_fops = { 94 .owner = THIS_MODULE, 95 .open = v4l2_fh_open, 96 .release = v4l2_fh_release, 97 .poll = v4l2_ctrl_poll, 98 .unlocked_ioctl = video_ioctl2, 99 }; 100 101 static int timbradio_probe(struct platform_device *pdev) 102 { 103 struct timb_radio_platform_data *pdata = pdev->dev.platform_data; 104 struct timbradio *tr; 105 int err; 106 107 if (!pdata) { 108 dev_err(&pdev->dev, "Platform data missing\n"); 109 err = -EINVAL; 110 goto err; 111 } 112 113 tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL); 114 if (!tr) { 115 err = -ENOMEM; 116 goto err; 117 } 118 119 tr->pdata = *pdata; 120 mutex_init(&tr->lock); 121 122 strlcpy(tr->video_dev.name, "Timberdale Radio", 123 sizeof(tr->video_dev.name)); 124 tr->video_dev.fops = &timbradio_fops; 125 tr->video_dev.ioctl_ops = &timbradio_ioctl_ops; 126 tr->video_dev.release = video_device_release_empty; 127 tr->video_dev.minor = -1; 128 tr->video_dev.lock = &tr->lock; 129 set_bit(V4L2_FL_USE_FH_PRIO, &tr->video_dev.flags); 130 131 strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name)); 132 err = v4l2_device_register(NULL, &tr->v4l2_dev); 133 if (err) 134 goto err; 135 136 tr->video_dev.v4l2_dev = &tr->v4l2_dev; 137 138 tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, 139 i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL); 140 tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, 141 i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL); 142 if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) 143 goto err_video_req; 144 145 tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler; 146 147 err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1); 148 if (err) { 149 dev_err(&pdev->dev, "Error reg video\n"); 150 goto err_video_req; 151 } 152 153 video_set_drvdata(&tr->video_dev, tr); 154 155 platform_set_drvdata(pdev, tr); 156 return 0; 157 158 err_video_req: 159 v4l2_device_unregister(&tr->v4l2_dev); 160 err: 161 dev_err(&pdev->dev, "Failed to register: %d\n", err); 162 163 return err; 164 } 165 166 static int timbradio_remove(struct platform_device *pdev) 167 { 168 struct timbradio *tr = platform_get_drvdata(pdev); 169 170 video_unregister_device(&tr->video_dev); 171 v4l2_device_unregister(&tr->v4l2_dev); 172 return 0; 173 } 174 175 static struct platform_driver timbradio_platform_driver = { 176 .driver = { 177 .name = DRIVER_NAME, 178 .owner = THIS_MODULE, 179 }, 180 .probe = timbradio_probe, 181 .remove = timbradio_remove, 182 }; 183 184 module_platform_driver(timbradio_platform_driver); 185 186 MODULE_DESCRIPTION("Timberdale Radio driver"); 187 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 188 MODULE_LICENSE("GPL v2"); 189 MODULE_VERSION("0.0.2"); 190 MODULE_ALIAS("platform:"DRIVER_NAME); 191