Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 1 | /* |
| 2 | * A driver for the AverMedia MR 800 USB FM radio. This device plugs |
| 3 | * into both the USB and an analog audio input, so this thing |
| 4 | * only deals with initialization and frequency setting, the |
| 5 | * audio data has to be handled by a sound driver. |
| 6 | * |
| 7 | * Copyright (c) 2008 Alexey Klimov <klimov.linux@gmail.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | /* |
Alexey Klimov | 71f07d9 | 2009-02-05 08:58:31 -0300 | [diff] [blame] | 25 | * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 26 | * |
| 27 | * When work was looked pretty good, i discover this: |
| 28 | * http://av-usbradio.sourceforge.net/index.php |
| 29 | * http://sourceforge.net/projects/av-usbradio/ |
| 30 | * Latest release of theirs project was in 2005. |
| 31 | * Probably, this driver could be improved trough using their |
| 32 | * achievements (specifications given). |
Alexey Klimov | 71f07d9 | 2009-02-05 08:58:31 -0300 | [diff] [blame] | 33 | * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio |
| 34 | * in 2007. He allowed to use his driver to improve current mr800 radio driver. |
| 35 | * http://kerneltrap.org/mailarchive/linux-usb-devel/2007/10/11/342492 |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 36 | * |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 37 | * Version 0.01: First working version. |
| 38 | * It's required to blacklist AverMedia USB Radio |
| 39 | * in usbhid/hid-quirks.c |
Alexey Klimov | 71f07d9 | 2009-02-05 08:58:31 -0300 | [diff] [blame] | 40 | * Version 0.10: A lot of cleanups and fixes: unpluging the device, |
| 41 | * few mutex locks were added, codinstyle issues, etc. |
| 42 | * Added stereo support. Thanks to |
| 43 | * Douglas Schilling Landgraf <dougsland@gmail.com> and |
| 44 | * David Ellingsworth <david@identd.dyndns.org> |
| 45 | * for discussion, help and support. |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 46 | * Version 0.11: Converted to v4l2_device. |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 47 | * |
| 48 | * Many things to do: |
| 49 | * - Correct power managment of device (suspend & resume) |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 50 | * - Add code for scanning and smooth tuning |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 51 | * - Add code for sensitivity value |
| 52 | * - Correct mistakes |
| 53 | * - In Japan another FREQ_MIN and FREQ_MAX |
| 54 | */ |
| 55 | |
| 56 | /* kernel includes */ |
| 57 | #include <linux/kernel.h> |
| 58 | #include <linux/module.h> |
| 59 | #include <linux/init.h> |
| 60 | #include <linux/slab.h> |
| 61 | #include <linux/input.h> |
| 62 | #include <linux/videodev2.h> |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 63 | #include <media/v4l2-device.h> |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 64 | #include <media/v4l2-ioctl.h> |
| 65 | #include <linux/usb.h> |
| 66 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
Alessio Igor Bogani | 24c44d8 | 2009-05-12 17:39:27 -0300 | [diff] [blame] | 67 | #include <linux/mutex.h> |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 68 | |
| 69 | /* driver and module definitions */ |
| 70 | #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" |
| 71 | #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 72 | #define DRIVER_VERSION "0.11" |
| 73 | #define RADIO_VERSION KERNEL_VERSION(0, 1, 1) |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 74 | |
| 75 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 76 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 77 | MODULE_LICENSE("GPL"); |
| 78 | |
| 79 | #define USB_AMRADIO_VENDOR 0x07ca |
| 80 | #define USB_AMRADIO_PRODUCT 0xb800 |
| 81 | |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 82 | /* dev_warn macro with driver name */ |
| 83 | #define MR800_DRIVER_NAME "radio-mr800" |
| 84 | #define amradio_dev_warn(dev, fmt, arg...) \ |
| 85 | dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) |
| 86 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 87 | /* Probably USB_TIMEOUT should be modified in module parameter */ |
| 88 | #define BUFFER_LENGTH 8 |
| 89 | #define USB_TIMEOUT 500 |
| 90 | |
| 91 | /* Frequency limits in MHz -- these are European values. For Japanese |
| 92 | devices, that would be 76 and 91. */ |
| 93 | #define FREQ_MIN 87.5 |
| 94 | #define FREQ_MAX 108.0 |
| 95 | #define FREQ_MUL 16000 |
| 96 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 97 | /* |
| 98 | * Commands that device should understand |
| 99 | * List isnt full and will be updated with implementation of new functions |
| 100 | */ |
Alexey Klimov | f7c1a38 | 2009-02-05 08:54:17 -0300 | [diff] [blame] | 101 | #define AMRADIO_SET_FREQ 0xa4 |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 102 | #define AMRADIO_SET_MUTE 0xab |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 103 | #define AMRADIO_SET_MONO 0xae |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 104 | |
| 105 | /* Comfortable defines for amradio_set_mute */ |
| 106 | #define AMRADIO_START 0x00 |
| 107 | #define AMRADIO_STOP 0x01 |
| 108 | |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 109 | /* Comfortable defines for amradio_set_stereo */ |
| 110 | #define WANT_STEREO 0x00 |
| 111 | #define WANT_MONO 0x01 |
| 112 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 113 | /* module parameter */ |
| 114 | static int radio_nr = -1; |
| 115 | module_param(radio_nr, int, 0); |
| 116 | MODULE_PARM_DESC(radio_nr, "Radio Nr"); |
| 117 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 118 | static int usb_amradio_probe(struct usb_interface *intf, |
| 119 | const struct usb_device_id *id); |
| 120 | static void usb_amradio_disconnect(struct usb_interface *intf); |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 121 | static int usb_amradio_open(struct file *file); |
| 122 | static int usb_amradio_close(struct file *file); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 123 | static int usb_amradio_suspend(struct usb_interface *intf, |
| 124 | pm_message_t message); |
| 125 | static int usb_amradio_resume(struct usb_interface *intf); |
| 126 | |
| 127 | /* Data for one (physical) device */ |
| 128 | struct amradio_device { |
| 129 | /* reference to USB and video device */ |
| 130 | struct usb_device *usbdev; |
| 131 | struct video_device *videodev; |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 132 | struct v4l2_device v4l2_dev; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 133 | |
| 134 | unsigned char *buffer; |
| 135 | struct mutex lock; /* buffer locking */ |
| 136 | int curfreq; |
| 137 | int stereo; |
| 138 | int users; |
| 139 | int removed; |
| 140 | int muted; |
| 141 | }; |
| 142 | |
| 143 | /* USB Device ID List */ |
| 144 | static struct usb_device_id usb_amradio_device_table[] = { |
| 145 | {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, |
| 146 | USB_CLASS_HID, 0, 0) }, |
| 147 | { } /* Terminating entry */ |
| 148 | }; |
| 149 | |
| 150 | MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); |
| 151 | |
| 152 | /* USB subsystem interface */ |
| 153 | static struct usb_driver usb_amradio_driver = { |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 154 | .name = MR800_DRIVER_NAME, |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 155 | .probe = usb_amradio_probe, |
| 156 | .disconnect = usb_amradio_disconnect, |
| 157 | .suspend = usb_amradio_suspend, |
| 158 | .resume = usb_amradio_resume, |
| 159 | .reset_resume = usb_amradio_resume, |
| 160 | .id_table = usb_amradio_device_table, |
Alexey Klimov | f2ce917 | 2008-12-27 21:31:49 -0300 | [diff] [blame] | 161 | .supports_autosuspend = 0, |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 162 | }; |
| 163 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 164 | /* switch on/off the radio. Send 8 bytes to device */ |
| 165 | static int amradio_set_mute(struct amradio_device *radio, char argument) |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 166 | { |
| 167 | int retval; |
| 168 | int size; |
| 169 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 170 | /* safety check */ |
| 171 | if (radio->removed) |
| 172 | return -EIO; |
| 173 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 174 | mutex_lock(&radio->lock); |
| 175 | |
| 176 | radio->buffer[0] = 0x00; |
| 177 | radio->buffer[1] = 0x55; |
| 178 | radio->buffer[2] = 0xaa; |
| 179 | radio->buffer[3] = 0x00; |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 180 | radio->buffer[4] = AMRADIO_SET_MUTE; |
| 181 | radio->buffer[5] = argument; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 182 | radio->buffer[6] = 0x00; |
| 183 | radio->buffer[7] = 0x00; |
| 184 | |
| 185 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), |
| 186 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); |
| 187 | |
Alexey Klimov | e57458d | 2009-02-05 09:00:03 -0300 | [diff] [blame] | 188 | if (retval < 0 || size != BUFFER_LENGTH) { |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 189 | mutex_unlock(&radio->lock); |
| 190 | return retval; |
| 191 | } |
| 192 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 193 | radio->muted = argument; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 194 | |
Alexey Klimov | 7f03a58 | 2009-01-25 20:07:28 -0300 | [diff] [blame] | 195 | mutex_unlock(&radio->lock); |
| 196 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 197 | return retval; |
| 198 | } |
| 199 | |
| 200 | /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ |
| 201 | static int amradio_setfreq(struct amradio_device *radio, int freq) |
| 202 | { |
| 203 | int retval; |
| 204 | int size; |
Alexey Klimov | f7c1a38 | 2009-02-05 08:54:17 -0300 | [diff] [blame] | 205 | unsigned short freq_send = 0x10 + (freq >> 3) / 25; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 206 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 207 | /* safety check */ |
| 208 | if (radio->removed) |
| 209 | return -EIO; |
| 210 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 211 | mutex_lock(&radio->lock); |
| 212 | |
| 213 | radio->buffer[0] = 0x00; |
| 214 | radio->buffer[1] = 0x55; |
| 215 | radio->buffer[2] = 0xaa; |
| 216 | radio->buffer[3] = 0x03; |
Alexey Klimov | f7c1a38 | 2009-02-05 08:54:17 -0300 | [diff] [blame] | 217 | radio->buffer[4] = AMRADIO_SET_FREQ; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 218 | radio->buffer[5] = 0x00; |
| 219 | radio->buffer[6] = 0x00; |
| 220 | radio->buffer[7] = 0x08; |
| 221 | |
| 222 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), |
| 223 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); |
| 224 | |
Alexey Klimov | e57458d | 2009-02-05 09:00:03 -0300 | [diff] [blame] | 225 | if (retval < 0 || size != BUFFER_LENGTH) { |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 226 | mutex_unlock(&radio->lock); |
| 227 | return retval; |
| 228 | } |
| 229 | |
| 230 | /* frequency is calculated from freq_send and placed in first 2 bytes */ |
| 231 | radio->buffer[0] = (freq_send >> 8) & 0xff; |
| 232 | radio->buffer[1] = freq_send & 0xff; |
| 233 | radio->buffer[2] = 0x01; |
| 234 | radio->buffer[3] = 0x00; |
| 235 | radio->buffer[4] = 0x00; |
| 236 | /* 5 and 6 bytes of buffer already = 0x00 */ |
| 237 | radio->buffer[7] = 0x00; |
| 238 | |
| 239 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), |
| 240 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); |
| 241 | |
Alexey Klimov | e57458d | 2009-02-05 09:00:03 -0300 | [diff] [blame] | 242 | if (retval < 0 || size != BUFFER_LENGTH) { |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 243 | mutex_unlock(&radio->lock); |
| 244 | return retval; |
| 245 | } |
| 246 | |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 247 | mutex_unlock(&radio->lock); |
| 248 | |
| 249 | return retval; |
| 250 | } |
| 251 | |
| 252 | static int amradio_set_stereo(struct amradio_device *radio, char argument) |
| 253 | { |
| 254 | int retval; |
| 255 | int size; |
| 256 | |
| 257 | /* safety check */ |
| 258 | if (radio->removed) |
| 259 | return -EIO; |
| 260 | |
| 261 | mutex_lock(&radio->lock); |
| 262 | |
| 263 | radio->buffer[0] = 0x00; |
| 264 | radio->buffer[1] = 0x55; |
| 265 | radio->buffer[2] = 0xaa; |
| 266 | radio->buffer[3] = 0x00; |
| 267 | radio->buffer[4] = AMRADIO_SET_MONO; |
| 268 | radio->buffer[5] = argument; |
| 269 | radio->buffer[6] = 0x00; |
| 270 | radio->buffer[7] = 0x00; |
| 271 | |
| 272 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), |
| 273 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); |
| 274 | |
| 275 | if (retval < 0 || size != BUFFER_LENGTH) { |
| 276 | radio->stereo = -1; |
| 277 | mutex_unlock(&radio->lock); |
| 278 | return retval; |
| 279 | } |
| 280 | |
| 281 | radio->stereo = 1; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 282 | |
Alexey Klimov | 7f03a58 | 2009-01-25 20:07:28 -0300 | [diff] [blame] | 283 | mutex_unlock(&radio->lock); |
| 284 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 285 | return retval; |
| 286 | } |
| 287 | |
Alexey Klimov | 71f07d9 | 2009-02-05 08:58:31 -0300 | [diff] [blame] | 288 | /* Handle unplugging the device. |
| 289 | * We call video_unregister_device in any case. |
| 290 | * The last function called in this procedure is |
| 291 | * usb_amradio_device_release. |
| 292 | */ |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 293 | static void usb_amradio_disconnect(struct usb_interface *intf) |
| 294 | { |
| 295 | struct amradio_device *radio = usb_get_intfdata(intf); |
| 296 | |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 297 | mutex_lock(&radio->lock); |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 298 | radio->removed = 1; |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 299 | mutex_unlock(&radio->lock); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 300 | |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 301 | usb_set_intfdata(intf, NULL); |
| 302 | video_unregister_device(radio->videodev); |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 303 | v4l2_device_disconnect(&radio->v4l2_dev); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | /* vidioc_querycap - query device capabilities */ |
| 307 | static int vidioc_querycap(struct file *file, void *priv, |
| 308 | struct v4l2_capability *v) |
| 309 | { |
Alexey Klimov | c7181cf | 2009-01-25 20:05:58 -0300 | [diff] [blame] | 310 | struct amradio_device *radio = video_drvdata(file); |
| 311 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 312 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); |
| 313 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); |
Alexey Klimov | c7181cf | 2009-01-25 20:05:58 -0300 | [diff] [blame] | 314 | usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 315 | v->version = RADIO_VERSION; |
| 316 | v->capabilities = V4L2_CAP_TUNER; |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | /* vidioc_g_tuner - get tuner attributes */ |
| 321 | static int vidioc_g_tuner(struct file *file, void *priv, |
| 322 | struct v4l2_tuner *v) |
| 323 | { |
| 324 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 325 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 326 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 327 | /* safety check */ |
| 328 | if (radio->removed) |
| 329 | return -EIO; |
| 330 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 331 | if (v->index > 0) |
| 332 | return -EINVAL; |
| 333 | |
| 334 | /* TODO: Add function which look is signal stereo or not |
| 335 | * amradio_getstat(radio); |
| 336 | */ |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 337 | |
| 338 | /* we call amradio_set_stereo to set radio->stereo |
| 339 | * Honestly, amradio_getstat should cover this in future and |
| 340 | * amradio_set_stereo shouldn't be here |
| 341 | */ |
| 342 | retval = amradio_set_stereo(radio, WANT_STEREO); |
| 343 | if (retval < 0) |
| 344 | amradio_dev_warn(&radio->videodev->dev, |
| 345 | "set stereo failed\n"); |
| 346 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 347 | strcpy(v->name, "FM"); |
| 348 | v->type = V4L2_TUNER_RADIO; |
| 349 | v->rangelow = FREQ_MIN * FREQ_MUL; |
| 350 | v->rangehigh = FREQ_MAX * FREQ_MUL; |
| 351 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; |
| 352 | v->capability = V4L2_TUNER_CAP_LOW; |
| 353 | if (radio->stereo) |
| 354 | v->audmode = V4L2_TUNER_MODE_STEREO; |
| 355 | else |
| 356 | v->audmode = V4L2_TUNER_MODE_MONO; |
| 357 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ |
| 358 | v->afc = 0; /* Don't know what is this */ |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | /* vidioc_s_tuner - set tuner attributes */ |
| 363 | static int vidioc_s_tuner(struct file *file, void *priv, |
| 364 | struct v4l2_tuner *v) |
| 365 | { |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 366 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 367 | int retval; |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 368 | |
| 369 | /* safety check */ |
| 370 | if (radio->removed) |
| 371 | return -EIO; |
| 372 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 373 | if (v->index > 0) |
| 374 | return -EINVAL; |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 375 | |
| 376 | /* mono/stereo selector */ |
| 377 | switch (v->audmode) { |
| 378 | case V4L2_TUNER_MODE_MONO: |
| 379 | retval = amradio_set_stereo(radio, WANT_MONO); |
| 380 | if (retval < 0) |
| 381 | amradio_dev_warn(&radio->videodev->dev, |
| 382 | "set mono failed\n"); |
| 383 | break; |
| 384 | case V4L2_TUNER_MODE_STEREO: |
| 385 | retval = amradio_set_stereo(radio, WANT_STEREO); |
| 386 | if (retval < 0) |
| 387 | amradio_dev_warn(&radio->videodev->dev, |
| 388 | "set stereo failed\n"); |
| 389 | break; |
| 390 | default: |
| 391 | return -EINVAL; |
| 392 | } |
| 393 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | /* vidioc_s_frequency - set tuner radio frequency */ |
| 398 | static int vidioc_s_frequency(struct file *file, void *priv, |
| 399 | struct v4l2_frequency *f) |
| 400 | { |
| 401 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 402 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 403 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 404 | /* safety check */ |
| 405 | if (radio->removed) |
| 406 | return -EIO; |
| 407 | |
Alexey Klimov | 52433bb | 2009-02-05 08:57:19 -0300 | [diff] [blame] | 408 | mutex_lock(&radio->lock); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 409 | radio->curfreq = f->frequency; |
Alexey Klimov | 52433bb | 2009-02-05 08:57:19 -0300 | [diff] [blame] | 410 | mutex_unlock(&radio->lock); |
| 411 | |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 412 | retval = amradio_setfreq(radio, radio->curfreq); |
| 413 | if (retval < 0) |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 414 | amradio_dev_warn(&radio->videodev->dev, |
| 415 | "set frequency failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | /* vidioc_g_frequency - get tuner radio frequency */ |
| 420 | static int vidioc_g_frequency(struct file *file, void *priv, |
| 421 | struct v4l2_frequency *f) |
| 422 | { |
| 423 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
| 424 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 425 | /* safety check */ |
| 426 | if (radio->removed) |
| 427 | return -EIO; |
| 428 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 429 | f->type = V4L2_TUNER_RADIO; |
| 430 | f->frequency = radio->curfreq; |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | /* vidioc_queryctrl - enumerate control items */ |
| 435 | static int vidioc_queryctrl(struct file *file, void *priv, |
| 436 | struct v4l2_queryctrl *qc) |
| 437 | { |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 438 | switch (qc->id) { |
| 439 | case V4L2_CID_AUDIO_MUTE: |
| 440 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 441 | } |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 442 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | /* vidioc_g_ctrl - get the value of a control */ |
| 447 | static int vidioc_g_ctrl(struct file *file, void *priv, |
| 448 | struct v4l2_control *ctrl) |
| 449 | { |
| 450 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
| 451 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 452 | /* safety check */ |
| 453 | if (radio->removed) |
| 454 | return -EIO; |
| 455 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 456 | switch (ctrl->id) { |
| 457 | case V4L2_CID_AUDIO_MUTE: |
| 458 | ctrl->value = radio->muted; |
| 459 | return 0; |
| 460 | } |
| 461 | return -EINVAL; |
| 462 | } |
| 463 | |
| 464 | /* vidioc_s_ctrl - set the value of a control */ |
| 465 | static int vidioc_s_ctrl(struct file *file, void *priv, |
| 466 | struct v4l2_control *ctrl) |
| 467 | { |
| 468 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 469 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 470 | |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 471 | /* safety check */ |
| 472 | if (radio->removed) |
| 473 | return -EIO; |
| 474 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 475 | switch (ctrl->id) { |
| 476 | case V4L2_CID_AUDIO_MUTE: |
| 477 | if (ctrl->value) { |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 478 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 479 | if (retval < 0) { |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 480 | amradio_dev_warn(&radio->videodev->dev, |
| 481 | "amradio_stop failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 482 | return -1; |
| 483 | } |
| 484 | } else { |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 485 | retval = amradio_set_mute(radio, AMRADIO_START); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 486 | if (retval < 0) { |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 487 | amradio_dev_warn(&radio->videodev->dev, |
| 488 | "amradio_start failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 489 | return -1; |
| 490 | } |
| 491 | } |
| 492 | return 0; |
| 493 | } |
| 494 | return -EINVAL; |
| 495 | } |
| 496 | |
| 497 | /* vidioc_g_audio - get audio attributes */ |
| 498 | static int vidioc_g_audio(struct file *file, void *priv, |
| 499 | struct v4l2_audio *a) |
| 500 | { |
| 501 | if (a->index > 1) |
| 502 | return -EINVAL; |
| 503 | |
| 504 | strcpy(a->name, "Radio"); |
| 505 | a->capability = V4L2_AUDCAP_STEREO; |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | /* vidioc_s_audio - set audio attributes */ |
| 510 | static int vidioc_s_audio(struct file *file, void *priv, |
| 511 | struct v4l2_audio *a) |
| 512 | { |
| 513 | if (a->index != 0) |
| 514 | return -EINVAL; |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | /* vidioc_g_input - get input */ |
| 519 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
| 520 | { |
| 521 | *i = 0; |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | /* vidioc_s_input - set input */ |
| 526 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
| 527 | { |
| 528 | if (i != 0) |
| 529 | return -EINVAL; |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | /* open device - amradio_start() and amradio_setfreq() */ |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 534 | static int usb_amradio_open(struct file *file) |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 535 | { |
| 536 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 537 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 538 | |
Alexey Klimov | 0fabb78 | 2008-10-19 23:56:23 -0300 | [diff] [blame] | 539 | lock_kernel(); |
| 540 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 541 | radio->users = 1; |
| 542 | radio->muted = 1; |
| 543 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 544 | retval = amradio_set_mute(radio, AMRADIO_START); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 545 | if (retval < 0) { |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 546 | amradio_dev_warn(&radio->videodev->dev, |
| 547 | "radio did not start up properly\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 548 | radio->users = 0; |
Alexey Klimov | 0fabb78 | 2008-10-19 23:56:23 -0300 | [diff] [blame] | 549 | unlock_kernel(); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 550 | return -EIO; |
| 551 | } |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 552 | |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 553 | retval = amradio_set_stereo(radio, WANT_STEREO); |
| 554 | if (retval < 0) |
| 555 | amradio_dev_warn(&radio->videodev->dev, |
| 556 | "set stereo failed\n"); |
| 557 | |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 558 | retval = amradio_setfreq(radio, radio->curfreq); |
| 559 | if (retval < 0) |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 560 | amradio_dev_warn(&radio->videodev->dev, |
| 561 | "set frequency failed\n"); |
Alexey Klimov | 0fabb78 | 2008-10-19 23:56:23 -0300 | [diff] [blame] | 562 | |
| 563 | unlock_kernel(); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 564 | return 0; |
| 565 | } |
| 566 | |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 567 | /*close device */ |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 568 | static int usb_amradio_close(struct file *file) |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 569 | { |
| 570 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 571 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 572 | |
| 573 | if (!radio) |
| 574 | return -ENODEV; |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 575 | |
Alexey Klimov | 52433bb | 2009-02-05 08:57:19 -0300 | [diff] [blame] | 576 | mutex_lock(&radio->lock); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 577 | radio->users = 0; |
Alexey Klimov | 52433bb | 2009-02-05 08:57:19 -0300 | [diff] [blame] | 578 | mutex_unlock(&radio->lock); |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 579 | |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 580 | if (!radio->removed) { |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 581 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 582 | if (retval < 0) |
| 583 | amradio_dev_warn(&radio->videodev->dev, |
| 584 | "amradio_stop failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 585 | } |
Alexey Klimov | 3480130 | 2008-11-19 00:36:29 -0300 | [diff] [blame] | 586 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | /* Suspend device - stop device. Need to be checked and fixed */ |
| 591 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) |
| 592 | { |
| 593 | struct amradio_device *radio = usb_get_intfdata(intf); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 594 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 595 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 596 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 597 | if (retval < 0) |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 598 | dev_warn(&intf->dev, "amradio_stop failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 599 | |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 600 | dev_info(&intf->dev, "going into suspend..\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 601 | |
| 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | /* Resume device - start device. Need to be checked and fixed */ |
| 606 | static int usb_amradio_resume(struct usb_interface *intf) |
| 607 | { |
| 608 | struct amradio_device *radio = usb_get_intfdata(intf); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 609 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 610 | |
Alexey Klimov | db82180 | 2009-02-05 08:53:02 -0300 | [diff] [blame] | 611 | retval = amradio_set_mute(radio, AMRADIO_START); |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 612 | if (retval < 0) |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 613 | dev_warn(&intf->dev, "amradio_start failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 614 | |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 615 | dev_info(&intf->dev, "coming out of suspend..\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | /* File system interface */ |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 621 | static const struct v4l2_file_operations usb_amradio_fops = { |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 622 | .owner = THIS_MODULE, |
| 623 | .open = usb_amradio_open, |
| 624 | .release = usb_amradio_close, |
| 625 | .ioctl = video_ioctl2, |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 626 | }; |
| 627 | |
| 628 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { |
| 629 | .vidioc_querycap = vidioc_querycap, |
| 630 | .vidioc_g_tuner = vidioc_g_tuner, |
| 631 | .vidioc_s_tuner = vidioc_s_tuner, |
| 632 | .vidioc_g_frequency = vidioc_g_frequency, |
| 633 | .vidioc_s_frequency = vidioc_s_frequency, |
| 634 | .vidioc_queryctrl = vidioc_queryctrl, |
| 635 | .vidioc_g_ctrl = vidioc_g_ctrl, |
| 636 | .vidioc_s_ctrl = vidioc_s_ctrl, |
| 637 | .vidioc_g_audio = vidioc_g_audio, |
| 638 | .vidioc_s_audio = vidioc_s_audio, |
| 639 | .vidioc_g_input = vidioc_g_input, |
| 640 | .vidioc_s_input = vidioc_s_input, |
| 641 | }; |
| 642 | |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 643 | static void usb_amradio_video_device_release(struct video_device *videodev) |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 644 | { |
| 645 | struct amradio_device *radio = video_get_drvdata(videodev); |
| 646 | |
| 647 | /* we call v4l to free radio->videodev */ |
| 648 | video_device_release(videodev); |
| 649 | |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 650 | v4l2_device_unregister(&radio->v4l2_dev); |
| 651 | |
Alexey Klimov | f4e9043 | 2008-12-27 21:30:34 -0300 | [diff] [blame] | 652 | /* free rest memory */ |
| 653 | kfree(radio->buffer); |
| 654 | kfree(radio); |
| 655 | } |
| 656 | |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 657 | /* check if the device is present and register with v4l and usb if it is */ |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 658 | static int usb_amradio_probe(struct usb_interface *intf, |
| 659 | const struct usb_device_id *id) |
| 660 | { |
| 661 | struct amradio_device *radio; |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 662 | struct v4l2_device *v4l2_dev; |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 663 | int retval; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 664 | |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 665 | radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 666 | |
Alexey Klimov | 8edafcc | 2009-02-05 08:51:51 -0300 | [diff] [blame] | 667 | if (!radio) { |
| 668 | dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 669 | return -ENOMEM; |
Alexey Klimov | 8edafcc | 2009-02-05 08:51:51 -0300 | [diff] [blame] | 670 | } |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 671 | |
| 672 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); |
| 673 | |
Alexey Klimov | 8edafcc | 2009-02-05 08:51:51 -0300 | [diff] [blame] | 674 | if (!radio->buffer) { |
| 675 | dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 676 | kfree(radio); |
| 677 | return -ENOMEM; |
| 678 | } |
| 679 | |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 680 | v4l2_dev = &radio->v4l2_dev; |
| 681 | retval = v4l2_device_register(&intf->dev, v4l2_dev); |
| 682 | if (retval < 0) { |
| 683 | dev_err(&intf->dev, "couldn't register v4l2_device\n"); |
| 684 | kfree(radio->buffer); |
| 685 | kfree(radio); |
| 686 | return retval; |
| 687 | } |
| 688 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 689 | radio->videodev = video_device_alloc(); |
| 690 | |
Alexey Klimov | 8edafcc | 2009-02-05 08:51:51 -0300 | [diff] [blame] | 691 | if (!radio->videodev) { |
| 692 | dev_err(&intf->dev, "video_device_alloc failed\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 693 | kfree(radio->buffer); |
| 694 | kfree(radio); |
| 695 | return -ENOMEM; |
| 696 | } |
| 697 | |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 698 | strlcpy(radio->videodev->name, v4l2_dev->name, sizeof(radio->videodev->name)); |
| 699 | radio->videodev->v4l2_dev = v4l2_dev; |
| 700 | radio->videodev->fops = &usb_amradio_fops; |
| 701 | radio->videodev->ioctl_ops = &usb_amradio_ioctl_ops; |
| 702 | radio->videodev->release = usb_amradio_video_device_release; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 703 | |
| 704 | radio->removed = 0; |
| 705 | radio->users = 0; |
| 706 | radio->usbdev = interface_to_usbdev(intf); |
| 707 | radio->curfreq = 95.16 * FREQ_MUL; |
Alexey Klimov | 1bb16d7 | 2009-02-05 08:56:07 -0300 | [diff] [blame] | 708 | radio->stereo = -1; |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 709 | |
| 710 | mutex_init(&radio->lock); |
| 711 | |
| 712 | video_set_drvdata(radio->videodev, radio); |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 713 | |
Alexey Klimov | a5d6947 | 2009-02-05 08:48:43 -0300 | [diff] [blame] | 714 | retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
| 715 | if (retval < 0) { |
Alexey Klimov | 65c51dc | 2009-02-05 08:49:58 -0300 | [diff] [blame] | 716 | dev_err(&intf->dev, "could not register video device\n"); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 717 | video_device_release(radio->videodev); |
Alexey Klimov | b466248 | 2009-04-03 18:45:27 -0300 | [diff] [blame] | 718 | v4l2_device_unregister(v4l2_dev); |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 719 | kfree(radio->buffer); |
| 720 | kfree(radio); |
| 721 | return -EIO; |
| 722 | } |
| 723 | |
| 724 | usb_set_intfdata(intf, radio); |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | static int __init amradio_init(void) |
| 729 | { |
| 730 | int retval = usb_register(&usb_amradio_driver); |
| 731 | |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 732 | pr_info(KBUILD_MODNAME |
| 733 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); |
| 734 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 735 | if (retval) |
Alexey Klimov | e60b022 | 2008-11-04 15:02:36 -0300 | [diff] [blame] | 736 | pr_err(KBUILD_MODNAME |
| 737 | ": usb_register failed. Error number %d\n", retval); |
| 738 | |
Alexey Klimov | 2aa72f3 | 2008-10-01 09:40:59 -0300 | [diff] [blame] | 739 | return retval; |
| 740 | } |
| 741 | |
| 742 | static void __exit amradio_exit(void) |
| 743 | { |
| 744 | usb_deregister(&usb_amradio_driver); |
| 745 | } |
| 746 | |
| 747 | module_init(amradio_init); |
| 748 | module_exit(amradio_exit); |
| 749 | |