Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1 | /* |
| 2 | * AirSpy SDR driver |
| 3 | * |
| 4 | * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/usb.h> |
| 20 | #include <media/v4l2-device.h> |
| 21 | #include <media/v4l2-ioctl.h> |
| 22 | #include <media/v4l2-ctrls.h> |
| 23 | #include <media/v4l2-event.h> |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 24 | #include <media/videobuf2-v4l2.h> |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 25 | #include <media/videobuf2-vmalloc.h> |
| 26 | |
| 27 | /* AirSpy USB API commands (from AirSpy Library) */ |
| 28 | enum { |
| 29 | CMD_INVALID = 0x00, |
| 30 | CMD_RECEIVER_MODE = 0x01, |
| 31 | CMD_SI5351C_WRITE = 0x02, |
| 32 | CMD_SI5351C_READ = 0x03, |
| 33 | CMD_R820T_WRITE = 0x04, |
| 34 | CMD_R820T_READ = 0x05, |
| 35 | CMD_SPIFLASH_ERASE = 0x06, |
| 36 | CMD_SPIFLASH_WRITE = 0x07, |
| 37 | CMD_SPIFLASH_READ = 0x08, |
| 38 | CMD_BOARD_ID_READ = 0x09, |
| 39 | CMD_VERSION_STRING_READ = 0x0a, |
| 40 | CMD_BOARD_PARTID_SERIALNO_READ = 0x0b, |
| 41 | CMD_SET_SAMPLE_RATE = 0x0c, |
| 42 | CMD_SET_FREQ = 0x0d, |
| 43 | CMD_SET_LNA_GAIN = 0x0e, |
| 44 | CMD_SET_MIXER_GAIN = 0x0f, |
| 45 | CMD_SET_VGA_GAIN = 0x10, |
| 46 | CMD_SET_LNA_AGC = 0x11, |
| 47 | CMD_SET_MIXER_AGC = 0x12, |
| 48 | CMD_SET_PACKING = 0x13, |
| 49 | }; |
| 50 | |
| 51 | /* |
| 52 | * bEndpointAddress 0x81 EP 1 IN |
| 53 | * Transfer Type Bulk |
| 54 | * wMaxPacketSize 0x0200 1x 512 bytes |
| 55 | */ |
| 56 | #define MAX_BULK_BUFS (6) |
| 57 | #define BULK_BUFFER_SIZE (128 * 512) |
| 58 | |
| 59 | static const struct v4l2_frequency_band bands[] = { |
| 60 | { |
| 61 | .tuner = 0, |
| 62 | .type = V4L2_TUNER_ADC, |
| 63 | .index = 0, |
| 64 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 65 | .rangelow = 20000000, |
Antti Palosaari | eb83eab | 2014-07-17 21:15:11 -0300 | [diff] [blame] | 66 | .rangehigh = 20000000, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 67 | }, |
| 68 | }; |
| 69 | |
| 70 | static const struct v4l2_frequency_band bands_rf[] = { |
| 71 | { |
| 72 | .tuner = 1, |
| 73 | .type = V4L2_TUNER_RF, |
| 74 | .index = 0, |
| 75 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 76 | .rangelow = 24000000, |
| 77 | .rangehigh = 1750000000, |
| 78 | }, |
| 79 | }; |
| 80 | |
| 81 | /* stream formats */ |
| 82 | struct airspy_format { |
| 83 | char *name; |
| 84 | u32 pixelformat; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 85 | u32 buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | /* format descriptions for capture and preview */ |
| 89 | static struct airspy_format formats[] = { |
| 90 | { |
| 91 | .name = "Real U12LE", |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 92 | .pixelformat = V4L2_SDR_FMT_RU12LE, |
| 93 | .buffersize = BULK_BUFFER_SIZE, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 94 | }, |
| 95 | }; |
| 96 | |
| 97 | static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); |
| 98 | |
| 99 | /* intermediate buffers with raw data from the USB device */ |
| 100 | struct airspy_frame_buf { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 101 | /* common v4l buffer stuff -- must be first */ |
| 102 | struct vb2_v4l2_buffer vb; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 103 | struct list_head list; |
| 104 | }; |
| 105 | |
| 106 | struct airspy { |
Mauro Carvalho Chehab | f6f7b58 | 2016-02-27 07:51:07 -0300 | [diff] [blame] | 107 | #define POWER_ON 1 |
| 108 | #define USB_STATE_URB_BUF 2 |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 109 | unsigned long flags; |
| 110 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 111 | struct device *dev; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 112 | struct usb_device *udev; |
| 113 | struct video_device vdev; |
| 114 | struct v4l2_device v4l2_dev; |
| 115 | |
| 116 | /* videobuf2 queue and queued buffers list */ |
| 117 | struct vb2_queue vb_queue; |
| 118 | struct list_head queued_bufs; |
| 119 | spinlock_t queued_bufs_lock; /* Protects queued_bufs */ |
| 120 | unsigned sequence; /* Buffer sequence counter */ |
| 121 | unsigned int vb_full; /* vb is full and packets dropped */ |
| 122 | |
| 123 | /* Note if taking both locks v4l2_lock must always be locked first! */ |
| 124 | struct mutex v4l2_lock; /* Protects everything else */ |
| 125 | struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */ |
| 126 | |
| 127 | struct urb *urb_list[MAX_BULK_BUFS]; |
| 128 | int buf_num; |
| 129 | unsigned long buf_size; |
| 130 | u8 *buf_list[MAX_BULK_BUFS]; |
| 131 | dma_addr_t dma_addr[MAX_BULK_BUFS]; |
| 132 | int urbs_initialized; |
| 133 | int urbs_submitted; |
| 134 | |
| 135 | /* USB control message buffer */ |
Antti Palosaari | aa0850e | 2015-10-26 18:58:14 -0200 | [diff] [blame] | 136 | #define BUF_SIZE 128 |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 137 | u8 buf[BUF_SIZE]; |
| 138 | |
| 139 | /* Current configuration */ |
| 140 | unsigned int f_adc; |
| 141 | unsigned int f_rf; |
| 142 | u32 pixelformat; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 143 | u32 buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 144 | |
| 145 | /* Controls */ |
| 146 | struct v4l2_ctrl_handler hdl; |
| 147 | struct v4l2_ctrl *lna_gain_auto; |
| 148 | struct v4l2_ctrl *lna_gain; |
| 149 | struct v4l2_ctrl *mixer_gain_auto; |
| 150 | struct v4l2_ctrl *mixer_gain; |
| 151 | struct v4l2_ctrl *if_gain; |
| 152 | |
| 153 | /* Sample rate calc */ |
| 154 | unsigned long jiffies_next; |
| 155 | unsigned int sample; |
| 156 | unsigned int sample_measured; |
| 157 | }; |
| 158 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 159 | #define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \ |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 160 | char *_direction; \ |
| 161 | if (_t & USB_DIR_IN) \ |
| 162 | _direction = "<<<"; \ |
| 163 | else \ |
| 164 | _direction = ">>>"; \ |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 165 | dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \ |
| 166 | _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \ |
| 167 | _l & 0xff, _l >> 8, _direction, _l, _b); \ |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | /* execute firmware command */ |
| 171 | static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index, |
| 172 | u8 *data, u16 size) |
| 173 | { |
| 174 | int ret; |
| 175 | unsigned int pipe; |
| 176 | u8 requesttype; |
| 177 | |
| 178 | switch (request) { |
| 179 | case CMD_RECEIVER_MODE: |
| 180 | case CMD_SET_FREQ: |
| 181 | pipe = usb_sndctrlpipe(s->udev, 0); |
| 182 | requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT); |
| 183 | break; |
| 184 | case CMD_BOARD_ID_READ: |
| 185 | case CMD_VERSION_STRING_READ: |
| 186 | case CMD_BOARD_PARTID_SERIALNO_READ: |
| 187 | case CMD_SET_LNA_GAIN: |
| 188 | case CMD_SET_MIXER_GAIN: |
| 189 | case CMD_SET_VGA_GAIN: |
| 190 | case CMD_SET_LNA_AGC: |
| 191 | case CMD_SET_MIXER_AGC: |
| 192 | pipe = usb_rcvctrlpipe(s->udev, 0); |
| 193 | requesttype = (USB_TYPE_VENDOR | USB_DIR_IN); |
| 194 | break; |
| 195 | default: |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 196 | dev_err(s->dev, "Unknown command %02x\n", request); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 197 | ret = -EINVAL; |
| 198 | goto err; |
| 199 | } |
| 200 | |
| 201 | /* write request */ |
| 202 | if (!(requesttype & USB_DIR_IN)) |
| 203 | memcpy(s->buf, data, size); |
| 204 | |
| 205 | ret = usb_control_msg(s->udev, pipe, request, requesttype, value, |
| 206 | index, s->buf, size, 1000); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 207 | airspy_dbg_usb_control_msg(s->dev, request, requesttype, value, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 208 | index, s->buf, size); |
| 209 | if (ret < 0) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 210 | dev_err(s->dev, "usb_control_msg() failed %d request %02x\n", |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 211 | ret, request); |
| 212 | goto err; |
| 213 | } |
| 214 | |
| 215 | /* read request */ |
| 216 | if (requesttype & USB_DIR_IN) |
| 217 | memcpy(data, s->buf, size); |
| 218 | |
| 219 | return 0; |
| 220 | err: |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | /* Private functions */ |
| 225 | static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s) |
| 226 | { |
Antti Palosaari | 8880f2c | 2014-08-24 19:27:43 -0300 | [diff] [blame] | 227 | unsigned long flags; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 228 | struct airspy_frame_buf *buf = NULL; |
| 229 | |
| 230 | spin_lock_irqsave(&s->queued_bufs_lock, flags); |
| 231 | if (list_empty(&s->queued_bufs)) |
| 232 | goto leave; |
| 233 | |
| 234 | buf = list_entry(s->queued_bufs.next, |
| 235 | struct airspy_frame_buf, list); |
| 236 | list_del(&buf->list); |
| 237 | leave: |
| 238 | spin_unlock_irqrestore(&s->queued_bufs_lock, flags); |
| 239 | return buf; |
| 240 | } |
| 241 | |
| 242 | static unsigned int airspy_convert_stream(struct airspy *s, |
| 243 | void *dst, void *src, unsigned int src_len) |
| 244 | { |
| 245 | unsigned int dst_len; |
| 246 | |
| 247 | if (s->pixelformat == V4L2_SDR_FMT_RU12LE) { |
| 248 | memcpy(dst, src, src_len); |
| 249 | dst_len = src_len; |
| 250 | } else { |
| 251 | dst_len = 0; |
| 252 | } |
| 253 | |
Antti Palosaari | b8843c7 | 2014-08-24 20:11:27 -0300 | [diff] [blame] | 254 | /* calculate sample rate and output it in 10 seconds intervals */ |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 255 | if (unlikely(time_is_before_jiffies(s->jiffies_next))) { |
| 256 | #define MSECS 10000UL |
Antti Palosaari | b8843c7 | 2014-08-24 20:11:27 -0300 | [diff] [blame] | 257 | unsigned int msecs = jiffies_to_msecs(jiffies - |
| 258 | s->jiffies_next + msecs_to_jiffies(MSECS)); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 259 | unsigned int samples = s->sample - s->sample_measured; |
Antti Palosaari | 7057005 | 2014-08-24 18:31:52 -0300 | [diff] [blame] | 260 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 261 | s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); |
| 262 | s->sample_measured = s->sample; |
Antti Palosaari | b8843c7 | 2014-08-24 20:11:27 -0300 | [diff] [blame] | 263 | dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", |
| 264 | src_len, samples, msecs, |
| 265 | samples * 1000UL / msecs); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | /* total number of samples */ |
| 269 | s->sample += src_len / 2; |
| 270 | |
| 271 | return dst_len; |
| 272 | } |
| 273 | |
| 274 | /* |
| 275 | * This gets called for the bulk stream pipe. This is done in interrupt |
| 276 | * time, so it has to be fast, not crash, and not stall. Neat. |
| 277 | */ |
| 278 | static void airspy_urb_complete(struct urb *urb) |
| 279 | { |
| 280 | struct airspy *s = urb->context; |
| 281 | struct airspy_frame_buf *fbuf; |
| 282 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 283 | dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n", |
| 284 | urb->status, urb->actual_length, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 285 | urb->transfer_buffer_length, urb->error_count); |
| 286 | |
| 287 | switch (urb->status) { |
| 288 | case 0: /* success */ |
| 289 | case -ETIMEDOUT: /* NAK */ |
| 290 | break; |
| 291 | case -ECONNRESET: /* kill */ |
| 292 | case -ENOENT: |
| 293 | case -ESHUTDOWN: |
| 294 | return; |
| 295 | default: /* error */ |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 296 | dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 297 | break; |
| 298 | } |
| 299 | |
| 300 | if (likely(urb->actual_length > 0)) { |
| 301 | void *ptr; |
| 302 | unsigned int len; |
| 303 | /* get free framebuffer */ |
| 304 | fbuf = airspy_get_next_fill_buf(s); |
| 305 | if (unlikely(fbuf == NULL)) { |
| 306 | s->vb_full++; |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 307 | dev_notice_ratelimited(s->dev, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 308 | "videobuf is full, %d packets dropped\n", |
| 309 | s->vb_full); |
| 310 | goto skip; |
| 311 | } |
| 312 | |
| 313 | /* fill framebuffer */ |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 314 | ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 315 | len = airspy_convert_stream(s, ptr, urb->transfer_buffer, |
| 316 | urb->actual_length); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 317 | vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len); |
Junghak Sung | d6dd645 | 2015-11-03 08:16:37 -0200 | [diff] [blame] | 318 | fbuf->vb.vb2_buf.timestamp = ktime_get_ns(); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 319 | fbuf->vb.sequence = s->sequence++; |
| 320 | vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 321 | } |
| 322 | skip: |
| 323 | usb_submit_urb(urb, GFP_ATOMIC); |
| 324 | } |
| 325 | |
| 326 | static int airspy_kill_urbs(struct airspy *s) |
| 327 | { |
| 328 | int i; |
| 329 | |
| 330 | for (i = s->urbs_submitted - 1; i >= 0; i--) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 331 | dev_dbg(s->dev, "kill urb=%d\n", i); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 332 | /* stop the URB */ |
| 333 | usb_kill_urb(s->urb_list[i]); |
| 334 | } |
| 335 | s->urbs_submitted = 0; |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static int airspy_submit_urbs(struct airspy *s) |
| 341 | { |
| 342 | int i, ret; |
| 343 | |
| 344 | for (i = 0; i < s->urbs_initialized; i++) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 345 | dev_dbg(s->dev, "submit urb=%d\n", i); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 346 | ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC); |
| 347 | if (ret) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 348 | dev_err(s->dev, "Could not submit URB no. %d - get them all back\n", |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 349 | i); |
| 350 | airspy_kill_urbs(s); |
| 351 | return ret; |
| 352 | } |
| 353 | s->urbs_submitted++; |
| 354 | } |
| 355 | |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static int airspy_free_stream_bufs(struct airspy *s) |
| 360 | { |
Mauro Carvalho Chehab | f6f7b58 | 2016-02-27 07:51:07 -0300 | [diff] [blame] | 361 | if (test_bit(USB_STATE_URB_BUF, &s->flags)) { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 362 | while (s->buf_num) { |
| 363 | s->buf_num--; |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 364 | dev_dbg(s->dev, "free buf=%d\n", s->buf_num); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 365 | usb_free_coherent(s->udev, s->buf_size, |
| 366 | s->buf_list[s->buf_num], |
| 367 | s->dma_addr[s->buf_num]); |
| 368 | } |
| 369 | } |
Mauro Carvalho Chehab | f6f7b58 | 2016-02-27 07:51:07 -0300 | [diff] [blame] | 370 | clear_bit(USB_STATE_URB_BUF, &s->flags); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | static int airspy_alloc_stream_bufs(struct airspy *s) |
| 376 | { |
| 377 | s->buf_num = 0; |
| 378 | s->buf_size = BULK_BUFFER_SIZE; |
| 379 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 380 | dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n", |
| 381 | MAX_BULK_BUFS * BULK_BUFFER_SIZE); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 382 | |
| 383 | for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) { |
| 384 | s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev, |
| 385 | BULK_BUFFER_SIZE, GFP_ATOMIC, |
| 386 | &s->dma_addr[s->buf_num]); |
| 387 | if (!s->buf_list[s->buf_num]) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 388 | dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 389 | airspy_free_stream_bufs(s); |
| 390 | return -ENOMEM; |
| 391 | } |
| 392 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 393 | dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num, |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 394 | s->buf_list[s->buf_num], |
| 395 | (long long)s->dma_addr[s->buf_num]); |
Mauro Carvalho Chehab | f6f7b58 | 2016-02-27 07:51:07 -0300 | [diff] [blame] | 396 | set_bit(USB_STATE_URB_BUF, &s->flags); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | static int airspy_free_urbs(struct airspy *s) |
| 403 | { |
| 404 | int i; |
| 405 | |
| 406 | airspy_kill_urbs(s); |
| 407 | |
| 408 | for (i = s->urbs_initialized - 1; i >= 0; i--) { |
| 409 | if (s->urb_list[i]) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 410 | dev_dbg(s->dev, "free urb=%d\n", i); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 411 | /* free the URBs */ |
| 412 | usb_free_urb(s->urb_list[i]); |
| 413 | } |
| 414 | } |
| 415 | s->urbs_initialized = 0; |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static int airspy_alloc_urbs(struct airspy *s) |
| 421 | { |
| 422 | int i, j; |
| 423 | |
| 424 | /* allocate the URBs */ |
| 425 | for (i = 0; i < MAX_BULK_BUFS; i++) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 426 | dev_dbg(s->dev, "alloc urb=%d\n", i); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 427 | s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); |
| 428 | if (!s->urb_list[i]) { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 429 | for (j = 0; j < i; j++) |
| 430 | usb_free_urb(s->urb_list[j]); |
| 431 | return -ENOMEM; |
| 432 | } |
| 433 | usb_fill_bulk_urb(s->urb_list[i], |
| 434 | s->udev, |
| 435 | usb_rcvbulkpipe(s->udev, 0x81), |
| 436 | s->buf_list[i], |
| 437 | BULK_BUFFER_SIZE, |
| 438 | airspy_urb_complete, s); |
| 439 | |
| 440 | s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
| 441 | s->urb_list[i]->transfer_dma = s->dma_addr[i]; |
| 442 | s->urbs_initialized++; |
| 443 | } |
| 444 | |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | /* Must be called with vb_queue_lock hold */ |
| 449 | static void airspy_cleanup_queued_bufs(struct airspy *s) |
| 450 | { |
Antti Palosaari | 8880f2c | 2014-08-24 19:27:43 -0300 | [diff] [blame] | 451 | unsigned long flags; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 452 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 453 | dev_dbg(s->dev, "\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 454 | |
| 455 | spin_lock_irqsave(&s->queued_bufs_lock, flags); |
| 456 | while (!list_empty(&s->queued_bufs)) { |
| 457 | struct airspy_frame_buf *buf; |
Antti Palosaari | 7057005 | 2014-08-24 18:31:52 -0300 | [diff] [blame] | 458 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 459 | buf = list_entry(s->queued_bufs.next, |
| 460 | struct airspy_frame_buf, list); |
| 461 | list_del(&buf->list); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 462 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 463 | } |
| 464 | spin_unlock_irqrestore(&s->queued_bufs_lock, flags); |
| 465 | } |
| 466 | |
| 467 | /* The user yanked out the cable... */ |
| 468 | static void airspy_disconnect(struct usb_interface *intf) |
| 469 | { |
| 470 | struct v4l2_device *v = usb_get_intfdata(intf); |
| 471 | struct airspy *s = container_of(v, struct airspy, v4l2_dev); |
| 472 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 473 | dev_dbg(s->dev, "\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 474 | |
| 475 | mutex_lock(&s->vb_queue_lock); |
| 476 | mutex_lock(&s->v4l2_lock); |
| 477 | /* No need to keep the urbs around after disconnection */ |
| 478 | s->udev = NULL; |
| 479 | v4l2_device_disconnect(&s->v4l2_dev); |
| 480 | video_unregister_device(&s->vdev); |
| 481 | mutex_unlock(&s->v4l2_lock); |
| 482 | mutex_unlock(&s->vb_queue_lock); |
| 483 | |
| 484 | v4l2_device_put(&s->v4l2_dev); |
| 485 | } |
| 486 | |
| 487 | /* Videobuf2 operations */ |
| 488 | static int airspy_queue_setup(struct vb2_queue *vq, |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 489 | unsigned int *nbuffers, |
Hans Verkuil | 36c0f8b | 2016-04-15 09:15:05 -0300 | [diff] [blame] | 490 | unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 491 | { |
| 492 | struct airspy *s = vb2_get_drv_priv(vq); |
| 493 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 494 | dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 495 | |
| 496 | /* Need at least 8 buffers */ |
| 497 | if (vq->num_buffers + *nbuffers < 8) |
| 498 | *nbuffers = 8 - vq->num_buffers; |
| 499 | *nplanes = 1; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 500 | sizes[0] = PAGE_ALIGN(s->buffersize); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 501 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 502 | dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static void airspy_buf_queue(struct vb2_buffer *vb) |
| 507 | { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 508 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 509 | struct airspy *s = vb2_get_drv_priv(vb->vb2_queue); |
| 510 | struct airspy_frame_buf *buf = |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 511 | container_of(vbuf, struct airspy_frame_buf, vb); |
Antti Palosaari | 8880f2c | 2014-08-24 19:27:43 -0300 | [diff] [blame] | 512 | unsigned long flags; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 513 | |
| 514 | /* Check the device has not disconnected between prep and queuing */ |
| 515 | if (unlikely(!s->udev)) { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 516 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 517 | return; |
| 518 | } |
| 519 | |
| 520 | spin_lock_irqsave(&s->queued_bufs_lock, flags); |
| 521 | list_add_tail(&buf->list, &s->queued_bufs); |
| 522 | spin_unlock_irqrestore(&s->queued_bufs_lock, flags); |
| 523 | } |
| 524 | |
| 525 | static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count) |
| 526 | { |
| 527 | struct airspy *s = vb2_get_drv_priv(vq); |
| 528 | int ret; |
| 529 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 530 | dev_dbg(s->dev, "\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 531 | |
| 532 | if (!s->udev) |
| 533 | return -ENODEV; |
| 534 | |
| 535 | mutex_lock(&s->v4l2_lock); |
| 536 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 537 | s->sequence = 0; |
| 538 | |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 539 | set_bit(POWER_ON, &s->flags); |
| 540 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 541 | ret = airspy_alloc_stream_bufs(s); |
| 542 | if (ret) |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 543 | goto err_clear_bit; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 544 | |
| 545 | ret = airspy_alloc_urbs(s); |
| 546 | if (ret) |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 547 | goto err_free_stream_bufs; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 548 | |
| 549 | ret = airspy_submit_urbs(s); |
| 550 | if (ret) |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 551 | goto err_free_urbs; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 552 | |
| 553 | /* start hardware streaming */ |
| 554 | ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0); |
| 555 | if (ret) |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 556 | goto err_kill_urbs; |
| 557 | |
| 558 | goto exit_mutex_unlock; |
| 559 | |
| 560 | err_kill_urbs: |
| 561 | airspy_kill_urbs(s); |
| 562 | err_free_urbs: |
| 563 | airspy_free_urbs(s); |
| 564 | err_free_stream_bufs: |
| 565 | airspy_free_stream_bufs(s); |
| 566 | err_clear_bit: |
| 567 | clear_bit(POWER_ON, &s->flags); |
| 568 | |
| 569 | /* return all queued buffers to vb2 */ |
| 570 | { |
| 571 | struct airspy_frame_buf *buf, *tmp; |
| 572 | |
| 573 | list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) { |
| 574 | list_del(&buf->list); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 575 | vb2_buffer_done(&buf->vb.vb2_buf, |
| 576 | VB2_BUF_STATE_QUEUED); |
Antti Palosaari | 6b831d7 | 2014-08-24 21:59:36 -0300 | [diff] [blame] | 577 | } |
| 578 | } |
| 579 | |
| 580 | exit_mutex_unlock: |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 581 | mutex_unlock(&s->v4l2_lock); |
| 582 | |
| 583 | return ret; |
| 584 | } |
| 585 | |
| 586 | static void airspy_stop_streaming(struct vb2_queue *vq) |
| 587 | { |
| 588 | struct airspy *s = vb2_get_drv_priv(vq); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 589 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 590 | dev_dbg(s->dev, "\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 591 | |
| 592 | mutex_lock(&s->v4l2_lock); |
| 593 | |
| 594 | /* stop hardware streaming */ |
Mauro Carvalho Chehab | d9d889d | 2014-07-21 20:29:54 -0300 | [diff] [blame] | 595 | airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 596 | |
| 597 | airspy_kill_urbs(s); |
| 598 | airspy_free_urbs(s); |
| 599 | airspy_free_stream_bufs(s); |
| 600 | |
| 601 | airspy_cleanup_queued_bufs(s); |
| 602 | |
| 603 | clear_bit(POWER_ON, &s->flags); |
| 604 | |
| 605 | mutex_unlock(&s->v4l2_lock); |
| 606 | } |
| 607 | |
| 608 | static struct vb2_ops airspy_vb2_ops = { |
| 609 | .queue_setup = airspy_queue_setup, |
| 610 | .buf_queue = airspy_buf_queue, |
| 611 | .start_streaming = airspy_start_streaming, |
| 612 | .stop_streaming = airspy_stop_streaming, |
| 613 | .wait_prepare = vb2_ops_wait_prepare, |
| 614 | .wait_finish = vb2_ops_wait_finish, |
| 615 | }; |
| 616 | |
| 617 | static int airspy_querycap(struct file *file, void *fh, |
| 618 | struct v4l2_capability *cap) |
| 619 | { |
| 620 | struct airspy *s = video_drvdata(file); |
| 621 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 622 | strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); |
| 623 | strlcpy(cap->card, s->vdev.name, sizeof(cap->card)); |
| 624 | usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info)); |
| 625 | cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING | |
| 626 | V4L2_CAP_READWRITE | V4L2_CAP_TUNER; |
| 627 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv, |
| 633 | struct v4l2_fmtdesc *f) |
| 634 | { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 635 | if (f->index >= NUM_FORMATS) |
| 636 | return -EINVAL; |
| 637 | |
| 638 | strlcpy(f->description, formats[f->index].name, sizeof(f->description)); |
| 639 | f->pixelformat = formats[f->index].pixelformat; |
| 640 | |
| 641 | return 0; |
| 642 | } |
| 643 | |
| 644 | static int airspy_g_fmt_sdr_cap(struct file *file, void *priv, |
| 645 | struct v4l2_format *f) |
| 646 | { |
| 647 | struct airspy *s = video_drvdata(file); |
| 648 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 649 | f->fmt.sdr.pixelformat = s->pixelformat; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 650 | f->fmt.sdr.buffersize = s->buffersize; |
| 651 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 652 | |
| 653 | return 0; |
| 654 | } |
| 655 | |
| 656 | static int airspy_s_fmt_sdr_cap(struct file *file, void *priv, |
| 657 | struct v4l2_format *f) |
| 658 | { |
| 659 | struct airspy *s = video_drvdata(file); |
| 660 | struct vb2_queue *q = &s->vb_queue; |
| 661 | int i; |
| 662 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 663 | if (vb2_is_busy(q)) |
| 664 | return -EBUSY; |
| 665 | |
| 666 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
| 667 | for (i = 0; i < NUM_FORMATS; i++) { |
| 668 | if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 669 | s->pixelformat = formats[i].pixelformat; |
| 670 | s->buffersize = formats[i].buffersize; |
| 671 | f->fmt.sdr.buffersize = formats[i].buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 672 | return 0; |
| 673 | } |
| 674 | } |
| 675 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 676 | s->pixelformat = formats[0].pixelformat; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 677 | s->buffersize = formats[0].buffersize; |
| 678 | f->fmt.sdr.pixelformat = formats[0].pixelformat; |
| 679 | f->fmt.sdr.buffersize = formats[0].buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | static int airspy_try_fmt_sdr_cap(struct file *file, void *priv, |
| 685 | struct v4l2_format *f) |
| 686 | { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 687 | int i; |
| 688 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 689 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
| 690 | for (i = 0; i < NUM_FORMATS; i++) { |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 691 | if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { |
| 692 | f->fmt.sdr.buffersize = formats[i].buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 693 | return 0; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 694 | } |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | f->fmt.sdr.pixelformat = formats[0].pixelformat; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 698 | f->fmt.sdr.buffersize = formats[0].buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 699 | |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | static int airspy_s_tuner(struct file *file, void *priv, |
| 704 | const struct v4l2_tuner *v) |
| 705 | { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 706 | int ret; |
| 707 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 708 | if (v->index == 0) |
| 709 | ret = 0; |
| 710 | else if (v->index == 1) |
| 711 | ret = 0; |
| 712 | else |
| 713 | ret = -EINVAL; |
| 714 | |
| 715 | return ret; |
| 716 | } |
| 717 | |
| 718 | static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) |
| 719 | { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 720 | int ret; |
| 721 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 722 | if (v->index == 0) { |
| 723 | strlcpy(v->name, "AirSpy ADC", sizeof(v->name)); |
| 724 | v->type = V4L2_TUNER_ADC; |
| 725 | v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; |
| 726 | v->rangelow = bands[0].rangelow; |
| 727 | v->rangehigh = bands[0].rangehigh; |
| 728 | ret = 0; |
| 729 | } else if (v->index == 1) { |
| 730 | strlcpy(v->name, "AirSpy RF", sizeof(v->name)); |
| 731 | v->type = V4L2_TUNER_RF; |
| 732 | v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; |
| 733 | v->rangelow = bands_rf[0].rangelow; |
| 734 | v->rangehigh = bands_rf[0].rangehigh; |
| 735 | ret = 0; |
| 736 | } else { |
| 737 | ret = -EINVAL; |
| 738 | } |
| 739 | |
| 740 | return ret; |
| 741 | } |
| 742 | |
| 743 | static int airspy_g_frequency(struct file *file, void *priv, |
| 744 | struct v4l2_frequency *f) |
| 745 | { |
| 746 | struct airspy *s = video_drvdata(file); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 747 | int ret; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 748 | |
| 749 | if (f->tuner == 0) { |
| 750 | f->type = V4L2_TUNER_ADC; |
| 751 | f->frequency = s->f_adc; |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 752 | dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 753 | ret = 0; |
| 754 | } else if (f->tuner == 1) { |
| 755 | f->type = V4L2_TUNER_RF; |
| 756 | f->frequency = s->f_rf; |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 757 | dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); |
| 758 | ret = 0; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 759 | } else { |
| 760 | ret = -EINVAL; |
| 761 | } |
| 762 | |
| 763 | return ret; |
| 764 | } |
| 765 | |
| 766 | static int airspy_s_frequency(struct file *file, void *priv, |
| 767 | const struct v4l2_frequency *f) |
| 768 | { |
| 769 | struct airspy *s = video_drvdata(file); |
| 770 | int ret; |
| 771 | u8 buf[4]; |
| 772 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 773 | if (f->tuner == 0) { |
| 774 | s->f_adc = clamp_t(unsigned int, f->frequency, |
| 775 | bands[0].rangelow, |
| 776 | bands[0].rangehigh); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 777 | dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 778 | ret = 0; |
| 779 | } else if (f->tuner == 1) { |
| 780 | s->f_rf = clamp_t(unsigned int, f->frequency, |
| 781 | bands_rf[0].rangelow, |
| 782 | bands_rf[0].rangehigh); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 783 | dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 784 | buf[0] = (s->f_rf >> 0) & 0xff; |
| 785 | buf[1] = (s->f_rf >> 8) & 0xff; |
| 786 | buf[2] = (s->f_rf >> 16) & 0xff; |
| 787 | buf[3] = (s->f_rf >> 24) & 0xff; |
| 788 | ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4); |
| 789 | } else { |
| 790 | ret = -EINVAL; |
| 791 | } |
| 792 | |
| 793 | return ret; |
| 794 | } |
| 795 | |
| 796 | static int airspy_enum_freq_bands(struct file *file, void *priv, |
| 797 | struct v4l2_frequency_band *band) |
| 798 | { |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 799 | int ret; |
Antti Palosaari | 7057005 | 2014-08-24 18:31:52 -0300 | [diff] [blame] | 800 | |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 801 | if (band->tuner == 0) { |
| 802 | if (band->index >= ARRAY_SIZE(bands)) { |
| 803 | ret = -EINVAL; |
| 804 | } else { |
| 805 | *band = bands[band->index]; |
| 806 | ret = 0; |
| 807 | } |
| 808 | } else if (band->tuner == 1) { |
| 809 | if (band->index >= ARRAY_SIZE(bands_rf)) { |
| 810 | ret = -EINVAL; |
| 811 | } else { |
| 812 | *band = bands_rf[band->index]; |
| 813 | ret = 0; |
| 814 | } |
| 815 | } else { |
| 816 | ret = -EINVAL; |
| 817 | } |
| 818 | |
| 819 | return ret; |
| 820 | } |
| 821 | |
| 822 | static const struct v4l2_ioctl_ops airspy_ioctl_ops = { |
| 823 | .vidioc_querycap = airspy_querycap, |
| 824 | |
| 825 | .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap, |
| 826 | .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap, |
| 827 | .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap, |
| 828 | .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap, |
| 829 | |
| 830 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| 831 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| 832 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| 833 | .vidioc_querybuf = vb2_ioctl_querybuf, |
| 834 | .vidioc_qbuf = vb2_ioctl_qbuf, |
| 835 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| 836 | |
| 837 | .vidioc_streamon = vb2_ioctl_streamon, |
| 838 | .vidioc_streamoff = vb2_ioctl_streamoff, |
| 839 | |
| 840 | .vidioc_g_tuner = airspy_g_tuner, |
| 841 | .vidioc_s_tuner = airspy_s_tuner, |
| 842 | |
| 843 | .vidioc_g_frequency = airspy_g_frequency, |
| 844 | .vidioc_s_frequency = airspy_s_frequency, |
| 845 | .vidioc_enum_freq_bands = airspy_enum_freq_bands, |
| 846 | |
| 847 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| 848 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| 849 | .vidioc_log_status = v4l2_ctrl_log_status, |
| 850 | }; |
| 851 | |
| 852 | static const struct v4l2_file_operations airspy_fops = { |
| 853 | .owner = THIS_MODULE, |
| 854 | .open = v4l2_fh_open, |
| 855 | .release = vb2_fop_release, |
| 856 | .read = vb2_fop_read, |
| 857 | .poll = vb2_fop_poll, |
| 858 | .mmap = vb2_fop_mmap, |
| 859 | .unlocked_ioctl = video_ioctl2, |
| 860 | }; |
| 861 | |
| 862 | static struct video_device airspy_template = { |
| 863 | .name = "AirSpy SDR", |
| 864 | .release = video_device_release_empty, |
| 865 | .fops = &airspy_fops, |
| 866 | .ioctl_ops = &airspy_ioctl_ops, |
| 867 | }; |
| 868 | |
| 869 | static void airspy_video_release(struct v4l2_device *v) |
| 870 | { |
| 871 | struct airspy *s = container_of(v, struct airspy, v4l2_dev); |
| 872 | |
| 873 | v4l2_ctrl_handler_free(&s->hdl); |
| 874 | v4l2_device_unregister(&s->v4l2_dev); |
| 875 | kfree(s); |
| 876 | } |
| 877 | |
| 878 | static int airspy_set_lna_gain(struct airspy *s) |
| 879 | { |
| 880 | int ret; |
| 881 | u8 u8tmp; |
| 882 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 883 | dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n", |
| 884 | s->lna_gain_auto->cur.val, s->lna_gain_auto->val, |
| 885 | s->lna_gain->cur.val, s->lna_gain->val); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 886 | |
| 887 | ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val, |
| 888 | &u8tmp, 1); |
| 889 | if (ret) |
| 890 | goto err; |
| 891 | |
| 892 | if (s->lna_gain_auto->val == false) { |
| 893 | ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val, |
| 894 | &u8tmp, 1); |
| 895 | if (ret) |
| 896 | goto err; |
| 897 | } |
| 898 | err: |
| 899 | if (ret) |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 900 | dev_dbg(s->dev, "failed=%d\n", ret); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 901 | |
| 902 | return ret; |
| 903 | } |
| 904 | |
| 905 | static int airspy_set_mixer_gain(struct airspy *s) |
| 906 | { |
| 907 | int ret; |
| 908 | u8 u8tmp; |
| 909 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 910 | dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n", |
| 911 | s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val, |
| 912 | s->mixer_gain->cur.val, s->mixer_gain->val); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 913 | |
| 914 | ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val, |
| 915 | &u8tmp, 1); |
| 916 | if (ret) |
| 917 | goto err; |
| 918 | |
| 919 | if (s->mixer_gain_auto->val == false) { |
| 920 | ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0, |
| 921 | s->mixer_gain->val, &u8tmp, 1); |
| 922 | if (ret) |
| 923 | goto err; |
| 924 | } |
| 925 | err: |
| 926 | if (ret) |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 927 | dev_dbg(s->dev, "failed=%d\n", ret); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 928 | |
| 929 | return ret; |
| 930 | } |
| 931 | |
| 932 | static int airspy_set_if_gain(struct airspy *s) |
| 933 | { |
| 934 | int ret; |
| 935 | u8 u8tmp; |
| 936 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 937 | dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 938 | |
| 939 | ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val, |
| 940 | &u8tmp, 1); |
| 941 | if (ret) |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 942 | dev_dbg(s->dev, "failed=%d\n", ret); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 943 | |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | static int airspy_s_ctrl(struct v4l2_ctrl *ctrl) |
| 948 | { |
| 949 | struct airspy *s = container_of(ctrl->handler, struct airspy, hdl); |
| 950 | int ret; |
| 951 | |
| 952 | switch (ctrl->id) { |
| 953 | case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: |
| 954 | case V4L2_CID_RF_TUNER_LNA_GAIN: |
| 955 | ret = airspy_set_lna_gain(s); |
| 956 | break; |
| 957 | case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: |
| 958 | case V4L2_CID_RF_TUNER_MIXER_GAIN: |
| 959 | ret = airspy_set_mixer_gain(s); |
| 960 | break; |
| 961 | case V4L2_CID_RF_TUNER_IF_GAIN: |
| 962 | ret = airspy_set_if_gain(s); |
| 963 | break; |
| 964 | default: |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 965 | dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n", |
| 966 | ctrl->id, ctrl->name); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 967 | ret = -EINVAL; |
| 968 | } |
| 969 | |
| 970 | return ret; |
| 971 | } |
| 972 | |
| 973 | static const struct v4l2_ctrl_ops airspy_ctrl_ops = { |
| 974 | .s_ctrl = airspy_s_ctrl, |
| 975 | }; |
| 976 | |
| 977 | static int airspy_probe(struct usb_interface *intf, |
| 978 | const struct usb_device_id *id) |
| 979 | { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 980 | struct airspy *s; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 981 | int ret; |
| 982 | u8 u8tmp, buf[BUF_SIZE]; |
| 983 | |
| 984 | s = kzalloc(sizeof(struct airspy), GFP_KERNEL); |
| 985 | if (s == NULL) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 986 | dev_err(&intf->dev, "Could not allocate memory for state\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 987 | return -ENOMEM; |
| 988 | } |
| 989 | |
| 990 | mutex_init(&s->v4l2_lock); |
| 991 | mutex_init(&s->vb_queue_lock); |
| 992 | spin_lock_init(&s->queued_bufs_lock); |
| 993 | INIT_LIST_HEAD(&s->queued_bufs); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 994 | s->dev = &intf->dev; |
| 995 | s->udev = interface_to_usbdev(intf); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 996 | s->f_adc = bands[0].rangelow; |
| 997 | s->f_rf = bands_rf[0].rangelow; |
Antti Palosaari | 1b303e1 | 2014-07-18 21:22:08 -0300 | [diff] [blame] | 998 | s->pixelformat = formats[0].pixelformat; |
| 999 | s->buffersize = formats[0].buffersize; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1000 | |
| 1001 | /* Detect device */ |
| 1002 | ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); |
| 1003 | if (ret == 0) |
| 1004 | ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0, |
| 1005 | buf, BUF_SIZE); |
| 1006 | if (ret) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1007 | dev_err(s->dev, "Could not detect board\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1008 | goto err_free_mem; |
| 1009 | } |
| 1010 | |
| 1011 | buf[BUF_SIZE - 1] = '\0'; |
| 1012 | |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1013 | dev_info(s->dev, "Board ID: %02x\n", u8tmp); |
| 1014 | dev_info(s->dev, "Firmware version: %s\n", buf); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1015 | |
| 1016 | /* Init videobuf2 queue structure */ |
| 1017 | s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; |
| 1018 | s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; |
| 1019 | s->vb_queue.drv_priv = s; |
| 1020 | s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf); |
| 1021 | s->vb_queue.ops = &airspy_vb2_ops; |
| 1022 | s->vb_queue.mem_ops = &vb2_vmalloc_memops; |
| 1023 | s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| 1024 | ret = vb2_queue_init(&s->vb_queue); |
| 1025 | if (ret) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1026 | dev_err(s->dev, "Could not initialize vb2 queue\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1027 | goto err_free_mem; |
| 1028 | } |
| 1029 | |
| 1030 | /* Init video_device structure */ |
| 1031 | s->vdev = airspy_template; |
| 1032 | s->vdev.queue = &s->vb_queue; |
| 1033 | s->vdev.queue->lock = &s->vb_queue_lock; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1034 | video_set_drvdata(&s->vdev, s); |
| 1035 | |
| 1036 | /* Register the v4l2_device structure */ |
| 1037 | s->v4l2_dev.release = airspy_video_release; |
| 1038 | ret = v4l2_device_register(&intf->dev, &s->v4l2_dev); |
| 1039 | if (ret) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1040 | dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1041 | goto err_free_mem; |
| 1042 | } |
| 1043 | |
| 1044 | /* Register controls */ |
| 1045 | v4l2_ctrl_handler_init(&s->hdl, 5); |
| 1046 | s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, |
| 1047 | V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0); |
| 1048 | s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, |
| 1049 | V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8); |
| 1050 | v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false); |
| 1051 | s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, |
| 1052 | V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0); |
| 1053 | s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, |
| 1054 | V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8); |
| 1055 | v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false); |
| 1056 | s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, |
| 1057 | V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0); |
| 1058 | if (s->hdl.error) { |
| 1059 | ret = s->hdl.error; |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1060 | dev_err(s->dev, "Could not initialize controls\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1061 | goto err_free_controls; |
| 1062 | } |
| 1063 | |
| 1064 | v4l2_ctrl_handler_setup(&s->hdl); |
| 1065 | |
| 1066 | s->v4l2_dev.ctrl_handler = &s->hdl; |
| 1067 | s->vdev.v4l2_dev = &s->v4l2_dev; |
| 1068 | s->vdev.lock = &s->v4l2_lock; |
| 1069 | |
| 1070 | ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1); |
| 1071 | if (ret) { |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1072 | dev_err(s->dev, "Failed to register as video device (%d)\n", |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1073 | ret); |
James Patrick-Evans | aa93d1f | 2016-07-15 16:40:45 +0100 | [diff] [blame] | 1074 | goto err_free_controls; |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1075 | } |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1076 | dev_info(s->dev, "Registered as %s\n", |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1077 | video_device_node_name(&s->vdev)); |
Antti Palosaari | 617123a | 2014-08-24 19:14:32 -0300 | [diff] [blame] | 1078 | dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1079 | return 0; |
| 1080 | |
| 1081 | err_free_controls: |
| 1082 | v4l2_ctrl_handler_free(&s->hdl); |
Antti Palosaari | 634fe50 | 2014-06-27 21:30:55 -0300 | [diff] [blame] | 1083 | v4l2_device_unregister(&s->v4l2_dev); |
| 1084 | err_free_mem: |
| 1085 | kfree(s); |
| 1086 | return ret; |
| 1087 | } |
| 1088 | |
| 1089 | /* USB device ID list */ |
| 1090 | static struct usb_device_id airspy_id_table[] = { |
| 1091 | { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */ |
| 1092 | { } |
| 1093 | }; |
| 1094 | MODULE_DEVICE_TABLE(usb, airspy_id_table); |
| 1095 | |
| 1096 | /* USB subsystem interface */ |
| 1097 | static struct usb_driver airspy_driver = { |
| 1098 | .name = KBUILD_MODNAME, |
| 1099 | .probe = airspy_probe, |
| 1100 | .disconnect = airspy_disconnect, |
| 1101 | .id_table = airspy_id_table, |
| 1102 | }; |
| 1103 | |
| 1104 | module_usb_driver(airspy_driver); |
| 1105 | |
| 1106 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| 1107 | MODULE_DESCRIPTION("AirSpy SDR"); |
| 1108 | MODULE_LICENSE("GPL"); |