projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[media] rtl2832_sdr: do not use dynamic stack allocation
[deliverable/linux.git] / drivers / staging / media / rtl2832u_sdr / rtl2832_sdr.c
1 /*
2 * Realtek RTL2832U SDR driver
3 *
4 * Copyright (C) 2013 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 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * GNU Radio plugin "gr-kernel" for device usage will be on:
21 * http://git.linuxtv.org/anttip/gr-kernel.git
22 *
23 */
24
25 #include "dvb_frontend.h"
26 #include "rtl2832_sdr.h"
27 #include "dvb_usb.h"
28
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-event.h>
33 #include <media/videobuf2-vmalloc.h>
34
35 #include <linux/jiffies.h>
36 #include <linux/math64.h>
37
38 #define MAX_BULK_BUFS (10)
39 #define BULK_BUFFER_SIZE (128 * 512)
40
41 static const struct v4l2_frequency_band bands_adc[] = {
42 {
43 .tuner = 0,
44 .type = V4L2_TUNER_ADC,
45 .index = 0,
46 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
47 .rangelow = 300000,
48 .rangehigh = 300000,
49 },
50 {
51 .tuner = 0,
52 .type = V4L2_TUNER_ADC,
53 .index = 1,
54 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
55 .rangelow = 900001,
56 .rangehigh = 2800000,
57 },
58 {
59 .tuner = 0,
60 .type = V4L2_TUNER_ADC,
61 .index = 2,
62 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
63 .rangelow = 3200000,
64 .rangehigh = 3200000,
65 },
66 };
67
68 static const struct v4l2_frequency_band bands_fm[] = {
69 {
70 .tuner = 1,
71 .type = V4L2_TUNER_RF,
72 .index = 0,
73 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
74 .rangelow = 50000000,
75 .rangehigh = 2000000000,
76 },
77 };
78
79 /* stream formats */
80 struct rtl2832_sdr_format {
81 char *name;
82 u32 pixelformat;
83 };
84
85 static struct rtl2832_sdr_format formats[] = {
86 {
87 .name = "IQ U8",
88 .pixelformat = V4L2_SDR_FMT_CU8,
89 }, {
90 .name = "IQ U16LE (emulated)",
91 .pixelformat = V4L2_SDR_FMT_CU16LE,
92 },
93 };
94
95 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
96
97 /* intermediate buffers with raw data from the USB device */
98 struct rtl2832_sdr_frame_buf {
99 struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
100 struct list_head list;
101 };
102
103 struct rtl2832_sdr_state {
104 #define POWER_ON (1 << 1)
105 #define URB_BUF (1 << 2)
106 unsigned long flags;
107
108 const struct rtl2832_config *cfg;
109 struct dvb_frontend *fe;
110 struct dvb_usb_device *d;
111 struct i2c_adapter *i2c;
112 u8 bank;
113
114 struct video_device vdev;
115 struct v4l2_device v4l2_dev;
116
117 /* videobuf2 queue and queued buffers list */
118 struct vb2_queue vb_queue;
119 struct list_head queued_bufs;
120 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
121 unsigned sequence; /* buffer sequence counter */
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 /* Pointer to our usb_device, will be NULL after unplug */
128 struct usb_device *udev; /* Both mutexes most be hold when setting! */
129
130 unsigned int vb_full; /* vb is full and packets dropped */
131
132 struct urb *urb_list[MAX_BULK_BUFS];
133 int buf_num;
134 unsigned long buf_size;
135 u8 *buf_list[MAX_BULK_BUFS];
136 dma_addr_t dma_addr[MAX_BULK_BUFS];
137 int urbs_initialized;
138 int urbs_submitted;
139
140 unsigned int f_adc, f_tuner;
141 u32 pixelformat;
142
143 /* Controls */
144 struct v4l2_ctrl_handler hdl;
145 struct v4l2_ctrl *bandwidth_auto;
146 struct v4l2_ctrl *bandwidth;
147
148 /* for sample rate calc */
149 unsigned int sample;
150 unsigned int sample_measured;
151 unsigned long jiffies_next;
152 };
153
154 /* write multiple hardware registers */
155 static int rtl2832_sdr_wr(struct rtl2832_sdr_state *s, u8 reg, const u8 *val,
156 int len)
157 {
158 int ret;
159 #define MAX_WR_LEN 24
160 #define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
161 u8 buf[MAX_WR_XFER_LEN];
162 struct i2c_msg msg[1] = {
163 {
164 .addr = s->cfg->i2c_addr,
165 .flags = 0,
166 .len = 1 + len,
167 .buf = buf,
168 }
169 };
170
171 if (WARN_ON(len > MAX_WR_LEN))
172 return -EINVAL;
173
174 buf[0] = reg;
175 memcpy(&buf[1], val, len);
176
177 ret = i2c_transfer(s->i2c, msg, 1);
178 if (ret == 1) {
179 ret = 0;
180 } else {
181 dev_err(&s->i2c->dev,
182 "%s: I2C wr failed=%d reg=%02x len=%d\n",
183 KBUILD_MODNAME, ret, reg, len);
184 ret = -EREMOTEIO;
185 }
186 return ret;
187 }
188
189 /* read multiple hardware registers */
190 static int rtl2832_sdr_rd(struct rtl2832_sdr_state *s, u8 reg, u8 *val, int len)
191 {
192 int ret;
193 struct i2c_msg msg[2] = {
194 {
195 .addr = s->cfg->i2c_addr,
196 .flags = 0,
197 .len = 1,
198 .buf = &reg,
199 }, {
200 .addr = s->cfg->i2c_addr,
201 .flags = I2C_M_RD,
202 .len = len,
203 .buf = val,
204 }
205 };
206
207 ret = i2c_transfer(s->i2c, msg, 2);
208 if (ret == 2) {
209 ret = 0;
210 } else {
211 dev_err(&s->i2c->dev,
212 "%s: I2C rd failed=%d reg=%02x len=%d\n",
213 KBUILD_MODNAME, ret, reg, len);
214 ret = -EREMOTEIO;
215 }
216 return ret;
217 }
218
219 /* write multiple registers */
220 static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_state *s, u16 reg,
221 const u8 *val, int len)
222 {
223 int ret;
224 u8 reg2 = (reg >> 0) & 0xff;
225 u8 bank = (reg >> 8) & 0xff;
226
227 /* switch bank if needed */
228 if (bank != s->bank) {
229 ret = rtl2832_sdr_wr(s, 0x00, &bank, 1);
230 if (ret)
231 return ret;
232
233 s->bank = bank;
234 }
235
236 return rtl2832_sdr_wr(s, reg2, val, len);
237 }
238
239 /* read multiple registers */
240 static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_state *s, u16 reg, u8 *val,
241 int len)
242 {
243 int ret;
244 u8 reg2 = (reg >> 0) & 0xff;
245 u8 bank = (reg >> 8) & 0xff;
246
247 /* switch bank if needed */
248 if (bank != s->bank) {
249 ret = rtl2832_sdr_wr(s, 0x00, &bank, 1);
250 if (ret)
251 return ret;
252
253 s->bank = bank;
254 }
255
256 return rtl2832_sdr_rd(s, reg2, val, len);
257 }
258
259 /* write single register */
260 static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_state *s, u16 reg, u8 val)
261 {
262 return rtl2832_sdr_wr_regs(s, reg, &val, 1);
263 }
264
265 #if 0
266 /* read single register */
267 static int rtl2832_sdr_rd_reg(struct rtl2832_sdr_state *s, u16 reg, u8 *val)
268 {
269 return rtl2832_sdr_rd_regs(s, reg, val, 1);
270 }
271 #endif
272
273 /* write single register with mask */
274 static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_state *s, u16 reg,
275 u8 val, u8 mask)
276 {
277 int ret;
278 u8 tmp;
279
280 /* no need for read if whole reg is written */
281 if (mask != 0xff) {
282 ret = rtl2832_sdr_rd_regs(s, reg, &tmp, 1);
283 if (ret)
284 return ret;
285
286 val &= mask;
287 tmp &= ~mask;
288 val |= tmp;
289 }
290
291 return rtl2832_sdr_wr_regs(s, reg, &val, 1);
292 }
293
294 #if 0
295 /* read single register with mask */
296 static int rtl2832_sdr_rd_reg_mask(struct rtl2832_sdr_state *s, u16 reg,
297 u8 *val, u8 mask)
298 {
299 int ret, i;
300 u8 tmp;
301
302 ret = rtl2832_sdr_rd_regs(s, reg, &tmp, 1);
303 if (ret)
304 return ret;
305
306 tmp &= mask;
307
308 /* find position of the first bit */
309 for (i = 0; i < 8; i++) {
310 if ((mask >> i) & 0x01)
311 break;
312 }
313 *val = tmp >> i;
314
315 return 0;
316 }
317 #endif
318
319 /* Private functions */
320 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
321 struct rtl2832_sdr_state *s)
322 {
323 unsigned long flags = 0;
324 struct rtl2832_sdr_frame_buf *buf = NULL;
325
326 spin_lock_irqsave(&s->queued_bufs_lock, flags);
327 if (list_empty(&s->queued_bufs))
328 goto leave;
329
330 buf = list_entry(s->queued_bufs.next,
331 struct rtl2832_sdr_frame_buf, list);
332 list_del(&buf->list);
333 leave:
334 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
335 return buf;
336 }
337
338 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_state *s,
339 void *dst, const u8 *src, unsigned int src_len)
340 {
341 unsigned int dst_len;
342
343 if (s->pixelformat == V4L2_SDR_FMT_CU8) {
344 /* native stream, no need to convert */
345 memcpy(dst, src, src_len);
346 dst_len = src_len;
347 } else if (s->pixelformat == V4L2_SDR_FMT_CU16LE) {
348 /* convert u8 to u16 */
349 unsigned int i;
350 u16 *u16dst = dst;
351 for (i = 0; i < src_len; i++)
352 *u16dst++ = (src[i] << 8) | (src[i] >> 0);
353 dst_len = 2 * src_len;
354 } else {
355 dst_len = 0;
356 }
357
358 /* calculate samping rate and output it in 10 seconds intervals */
359 if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
360 #define MSECS 10000UL
361 unsigned int samples = s->sample - s->sample_measured;
362 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
363 s->sample_measured = s->sample;
364 dev_dbg(&s->udev->dev,
365 "slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
366 src_len, samples, MSECS,
367 samples * 1000UL / MSECS);
368 }
369
370 /* total number of I+Q pairs */
371 s->sample += src_len / 2;
372
373 return dst_len;
374 }
375
376 /*
377 * This gets called for the bulk stream pipe. This is done in interrupt
378 * time, so it has to be fast, not crash, and not stall. Neat.
379 */
380 static void rtl2832_sdr_urb_complete(struct urb *urb)
381 {
382 struct rtl2832_sdr_state *s = urb->context;
383 struct rtl2832_sdr_frame_buf *fbuf;
384
385 dev_dbg_ratelimited(&s->udev->dev,
386 "%s: status=%d length=%d/%d errors=%d\n",
387 __func__, urb->status, urb->actual_length,
388 urb->transfer_buffer_length, urb->error_count);
389
390 switch (urb->status) {
391 case 0: /* success */
392 case -ETIMEDOUT: /* NAK */
393 break;
394 case -ECONNRESET: /* kill */
395 case -ENOENT:
396 case -ESHUTDOWN:
397 return;
398 default: /* error */
399 dev_err_ratelimited(&s->udev->dev, "urb failed=%d\n",
400 urb->status);
401 break;
402 }
403
404 if (likely(urb->actual_length > 0)) {
405 void *ptr;
406 unsigned int len;
407 /* get free framebuffer */
408 fbuf = rtl2832_sdr_get_next_fill_buf(s);
409 if (unlikely(fbuf == NULL)) {
410 s->vb_full++;
411 dev_notice_ratelimited(&s->udev->dev,
412 "videobuf is full, %d packets dropped\n",
413 s->vb_full);
414 goto skip;
415 }
416
417 /* fill framebuffer */
418 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
419 len = rtl2832_sdr_convert_stream(s, ptr, urb->transfer_buffer,
420 urb->actual_length);
421 vb2_set_plane_payload(&fbuf->vb, 0, len);
422 v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
423 fbuf->vb.v4l2_buf.sequence = s->sequence++;
424 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
425 }
426 skip:
427 usb_submit_urb(urb, GFP_ATOMIC);
428 }
429
430 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_state *s)
431 {
432 int i;
433
434 for (i = s->urbs_submitted - 1; i >= 0; i--) {
435 dev_dbg(&s->udev->dev, "%s: kill urb=%d\n", __func__, i);
436 /* stop the URB */
437 usb_kill_urb(s->urb_list[i]);
438 }
439 s->urbs_submitted = 0;
440
441 return 0;
442 }
443
444 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_state *s)
445 {
446 int i, ret;
447
448 for (i = 0; i < s->urbs_initialized; i++) {
449 dev_dbg(&s->udev->dev, "%s: submit urb=%d\n", __func__, i);
450 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
451 if (ret) {
452 dev_err(&s->udev->dev,
453 "Could not submit urb no. %d - get them all back\n",
454 i);
455 rtl2832_sdr_kill_urbs(s);
456 return ret;
457 }
458 s->urbs_submitted++;
459 }
460
461 return 0;
462 }
463
464 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_state *s)
465 {
466 if (s->flags & USB_STATE_URB_BUF) {
467 while (s->buf_num) {
468 s->buf_num--;
469 dev_dbg(&s->udev->dev, "%s: free buf=%d\n",
470 __func__, s->buf_num);
471 usb_free_coherent(s->udev, s->buf_size,
472 s->buf_list[s->buf_num],
473 s->dma_addr[s->buf_num]);
474 }
475 }
476 s->flags &= ~USB_STATE_URB_BUF;
477
478 return 0;
479 }
480
481 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_state *s)
482 {
483 s->buf_num = 0;
484 s->buf_size = BULK_BUFFER_SIZE;
485
486 dev_dbg(&s->udev->dev,
487 "%s: all in all I will use %u bytes for streaming\n",
488 __func__, MAX_BULK_BUFS * BULK_BUFFER_SIZE);
489
490 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
491 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
492 BULK_BUFFER_SIZE, GFP_ATOMIC,
493 &s->dma_addr[s->buf_num]);
494 if (!s->buf_list[s->buf_num]) {
495 dev_dbg(&s->udev->dev, "%s: alloc buf=%d failed\n",
496 __func__, s->buf_num);
497 rtl2832_sdr_free_stream_bufs(s);
498 return -ENOMEM;
499 }
500
501 dev_dbg(&s->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
502 __func__, s->buf_num,
503 s->buf_list[s->buf_num],
504 (long long)s->dma_addr[s->buf_num]);
505 s->flags |= USB_STATE_URB_BUF;
506 }
507
508 return 0;
509 }
510
511 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_state *s)
512 {
513 int i;
514
515 rtl2832_sdr_kill_urbs(s);
516
517 for (i = s->urbs_initialized - 1; i >= 0; i--) {
518 if (s->urb_list[i]) {
519 dev_dbg(&s->udev->dev, "%s: free urb=%d\n",
520 __func__, i);
521 /* free the URBs */
522 usb_free_urb(s->urb_list[i]);
523 }
524 }
525 s->urbs_initialized = 0;
526
527 return 0;
528 }
529
530 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_state *s)
531 {
532 int i, j;
533
534 /* allocate the URBs */
535 for (i = 0; i < MAX_BULK_BUFS; i++) {
536 dev_dbg(&s->udev->dev, "%s: alloc urb=%d\n", __func__, i);
537 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
538 if (!s->urb_list[i]) {
539 dev_dbg(&s->udev->dev, "%s: failed\n", __func__);
540 for (j = 0; j < i; j++)
541 usb_free_urb(s->urb_list[j]);
542 return -ENOMEM;
543 }
544 usb_fill_bulk_urb(s->urb_list[i],
545 s->udev,
546 usb_rcvbulkpipe(s->udev, 0x81),
547 s->buf_list[i],
548 BULK_BUFFER_SIZE,
549 rtl2832_sdr_urb_complete, s);
550
551 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
552 s->urb_list[i]->transfer_dma = s->dma_addr[i];
553 s->urbs_initialized++;
554 }
555
556 return 0;
557 }
558
559 /* Must be called with vb_queue_lock hold */
560 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_state *s)
561 {
562 unsigned long flags = 0;
563 dev_dbg(&s->udev->dev, "%s:\n", __func__);
564
565 spin_lock_irqsave(&s->queued_bufs_lock, flags);
566 while (!list_empty(&s->queued_bufs)) {
567 struct rtl2832_sdr_frame_buf *buf;
568 buf = list_entry(s->queued_bufs.next,
569 struct rtl2832_sdr_frame_buf, list);
570 list_del(&buf->list);
571 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
572 }
573 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
574 }
575
576 /* The user yanked out the cable... */
577 static void rtl2832_sdr_release_sec(struct dvb_frontend *fe)
578 {
579 struct rtl2832_sdr_state *s = fe->sec_priv;
580 dev_dbg(&s->udev->dev, "%s:\n", __func__);
581
582 mutex_lock(&s->vb_queue_lock);
583 mutex_lock(&s->v4l2_lock);
584 /* No need to keep the urbs around after disconnection */
585 s->udev = NULL;
586
587 v4l2_device_disconnect(&s->v4l2_dev);
588 video_unregister_device(&s->vdev);
589 mutex_unlock(&s->v4l2_lock);
590 mutex_unlock(&s->vb_queue_lock);
591
592 v4l2_device_put(&s->v4l2_dev);
593
594 fe->sec_priv = NULL;
595 }
596
597 static int rtl2832_sdr_querycap(struct file *file, void *fh,
598 struct v4l2_capability *cap)
599 {
600 struct rtl2832_sdr_state *s = video_drvdata(file);
601 dev_dbg(&s->udev->dev, "%s:\n", __func__);
602
603 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
604 strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
605 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
606 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
607 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
608 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
609 return 0;
610 }
611
612 /* Videobuf2 operations */
613 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
614 const struct v4l2_format *fmt, unsigned int *nbuffers,
615 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
616 {
617 struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
618 dev_dbg(&s->udev->dev, "%s: *nbuffers=%d\n", __func__, *nbuffers);
619
620 /* Need at least 8 buffers */
621 if (vq->num_buffers + *nbuffers < 8)
622 *nbuffers = 8 - vq->num_buffers;
623 *nplanes = 1;
624 /* 2 = max 16-bit sample returned */
625 sizes[0] = PAGE_ALIGN(BULK_BUFFER_SIZE * 2);
626 dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
627 __func__, *nbuffers, sizes[0]);
628 return 0;
629 }
630
631 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
632 {
633 struct rtl2832_sdr_state *s = vb2_get_drv_priv(vb->vb2_queue);
634
635 /* Don't allow queing new buffers after device disconnection */
636 if (!s->udev)
637 return -ENODEV;
638
639 return 0;
640 }
641
642 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
643 {
644 struct rtl2832_sdr_state *s = vb2_get_drv_priv(vb->vb2_queue);
645 struct rtl2832_sdr_frame_buf *buf =
646 container_of(vb, struct rtl2832_sdr_frame_buf, vb);
647 unsigned long flags = 0;
648
649 /* Check the device has not disconnected between prep and queuing */
650 if (!s->udev) {
651 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
652 return;
653 }
654
655 spin_lock_irqsave(&s->queued_bufs_lock, flags);
656 list_add_tail(&buf->list, &s->queued_bufs);
657 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
658 }
659
660 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_state *s)
661 {
662 struct dvb_frontend *fe = s->fe;
663 int ret;
664 unsigned int f_sr, f_if;
665 u8 buf[4], u8tmp1, u8tmp2;
666 u64 u64tmp;
667 u32 u32tmp;
668 dev_dbg(&s->udev->dev, "%s: f_adc=%u\n", __func__, s->f_adc);
669
670 if (!test_bit(POWER_ON, &s->flags))
671 return 0;
672
673 if (s->f_adc == 0)
674 return 0;
675
676 f_sr = s->f_adc;
677
678 ret = rtl2832_sdr_wr_regs(s, 0x13e, "\x00\x00", 2);
679 if (ret)
680 goto err;
681
682 ret = rtl2832_sdr_wr_regs(s, 0x115, "\x00\x00\x00\x00", 4);
683 if (ret)
684 goto err;
685
686 /* get IF from tuner */
687 if (fe->ops.tuner_ops.get_if_frequency)
688 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
689 else
690 ret = -EINVAL;
691
692 if (ret)
693 goto err;
694
695 /* program IF */
696 u64tmp = f_if % s->cfg->xtal;
697 u64tmp *= 0x400000;
698 u64tmp = div_u64(u64tmp, s->cfg->xtal);
699 u64tmp = -u64tmp;
700 u32tmp = u64tmp & 0x3fffff;
701
702 dev_dbg(&s->udev->dev, "%s: f_if=%u if_ctl=%08x\n",
703 __func__, f_if, u32tmp);
704
705 buf[0] = (u32tmp >> 16) & 0xff;
706 buf[1] = (u32tmp >> 8) & 0xff;
707 buf[2] = (u32tmp >> 0) & 0xff;
708
709 ret = rtl2832_sdr_wr_regs(s, 0x119, buf, 3);
710 if (ret)
711 goto err;
712
713 /* BB / IF mode */
714 /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
715 if (f_if) {
716 u8tmp1 = 0x1a; /* disable Zero-IF */
717 u8tmp2 = 0x8d; /* enable ADC I */
718 } else {
719 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
720 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
721 }
722
723 ret = rtl2832_sdr_wr_reg(s, 0x1b1, u8tmp1);
724 if (ret)
725 goto err;
726
727 ret = rtl2832_sdr_wr_reg(s, 0x008, u8tmp2);
728 if (ret)
729 goto err;
730
731 ret = rtl2832_sdr_wr_reg(s, 0x006, 0x80);
732 if (ret)
733 goto err;
734
735 /* program sampling rate (resampling down) */
736 u32tmp = div_u64(s->cfg->xtal * 0x400000ULL, f_sr * 4U);
737 u32tmp <<= 2;
738 buf[0] = (u32tmp >> 24) & 0xff;
739 buf[1] = (u32tmp >> 16) & 0xff;
740 buf[2] = (u32tmp >> 8) & 0xff;
741 buf[3] = (u32tmp >> 0) & 0xff;
742 ret = rtl2832_sdr_wr_regs(s, 0x19f, buf, 4);
743 if (ret)
744 goto err;
745
746 /* low-pass filter */
747 ret = rtl2832_sdr_wr_regs(s, 0x11c,
748 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
749 20);
750 if (ret)
751 goto err;
752
753 ret = rtl2832_sdr_wr_regs(s, 0x017, "\x11\x10", 2);
754 if (ret)
755 goto err;
756
757 /* mode */
758 ret = rtl2832_sdr_wr_regs(s, 0x019, "\x05", 1);
759 if (ret)
760 goto err;
761
762 ret = rtl2832_sdr_wr_regs(s, 0x01a, "\x1b\x16\x0d\x06\x01\xff", 6);
763 if (ret)
764 goto err;
765
766 /* FSM */
767 ret = rtl2832_sdr_wr_regs(s, 0x192, "\x00\xf0\x0f", 3);
768 if (ret)
769 goto err;
770
771 /* PID filter */
772 ret = rtl2832_sdr_wr_regs(s, 0x061, "\x60", 1);
773 if (ret)
774 goto err;
775
776 /* used RF tuner based settings */
777 switch (s->cfg->tuner) {
778 case RTL2832_TUNER_E4000:
779 ret = rtl2832_sdr_wr_regs(s, 0x112, "\x5a", 1);
780 ret = rtl2832_sdr_wr_regs(s, 0x102, "\x40", 1);
781 ret = rtl2832_sdr_wr_regs(s, 0x103, "\x5a", 1);
782 ret = rtl2832_sdr_wr_regs(s, 0x1c7, "\x30", 1);
783 ret = rtl2832_sdr_wr_regs(s, 0x104, "\xd0", 1);
784 ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1);
785 ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x18", 1);
786 ret = rtl2832_sdr_wr_regs(s, 0x106, "\x35", 1);
787 ret = rtl2832_sdr_wr_regs(s, 0x1c9, "\x21", 1);
788 ret = rtl2832_sdr_wr_regs(s, 0x1ca, "\x21", 1);
789 ret = rtl2832_sdr_wr_regs(s, 0x1cb, "\x00", 1);
790 ret = rtl2832_sdr_wr_regs(s, 0x107, "\x40", 1);
791 ret = rtl2832_sdr_wr_regs(s, 0x1cd, "\x10", 1);
792 ret = rtl2832_sdr_wr_regs(s, 0x1ce, "\x10", 1);
793 ret = rtl2832_sdr_wr_regs(s, 0x108, "\x80", 1);
794 ret = rtl2832_sdr_wr_regs(s, 0x109, "\x7f", 1);
795 ret = rtl2832_sdr_wr_regs(s, 0x10a, "\x80", 1);
796 ret = rtl2832_sdr_wr_regs(s, 0x10b, "\x7f", 1);
797 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
798 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
799 ret = rtl2832_sdr_wr_regs(s, 0x011, "\xd4", 1);
800 ret = rtl2832_sdr_wr_regs(s, 0x1e5, "\xf0", 1);
801 ret = rtl2832_sdr_wr_regs(s, 0x1d9, "\x00", 1);
802 ret = rtl2832_sdr_wr_regs(s, 0x1db, "\x00", 1);
803 ret = rtl2832_sdr_wr_regs(s, 0x1dd, "\x14", 1);
804 ret = rtl2832_sdr_wr_regs(s, 0x1de, "\xec", 1);
805 ret = rtl2832_sdr_wr_regs(s, 0x1d8, "\x0c", 1);
806 ret = rtl2832_sdr_wr_regs(s, 0x1e6, "\x02", 1);
807 ret = rtl2832_sdr_wr_regs(s, 0x1d7, "\x09", 1);
808 ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x83", 1);
809 ret = rtl2832_sdr_wr_regs(s, 0x010, "\x49", 1);
810 ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x87", 1);
811 ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x85", 1);
812 ret = rtl2832_sdr_wr_regs(s, 0x013, "\x02", 1);
813 break;
814 case RTL2832_TUNER_FC0012:
815 case RTL2832_TUNER_FC0013:
816 ret = rtl2832_sdr_wr_regs(s, 0x112, "\x5a", 1);
817 ret = rtl2832_sdr_wr_regs(s, 0x102, "\x40", 1);
818 ret = rtl2832_sdr_wr_regs(s, 0x103, "\x5a", 1);
819 ret = rtl2832_sdr_wr_regs(s, 0x1c7, "\x2c", 1);
820 ret = rtl2832_sdr_wr_regs(s, 0x104, "\xcc", 1);
821 ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1);
822 ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x16", 1);
823 ret = rtl2832_sdr_wr_regs(s, 0x106, "\x35", 1);
824 ret = rtl2832_sdr_wr_regs(s, 0x1c9, "\x21", 1);
825 ret = rtl2832_sdr_wr_regs(s, 0x1ca, "\x21", 1);
826 ret = rtl2832_sdr_wr_regs(s, 0x1cb, "\x00", 1);
827 ret = rtl2832_sdr_wr_regs(s, 0x107, "\x40", 1);
828 ret = rtl2832_sdr_wr_regs(s, 0x1cd, "\x10", 1);
829 ret = rtl2832_sdr_wr_regs(s, 0x1ce, "\x10", 1);
830 ret = rtl2832_sdr_wr_regs(s, 0x108, "\x80", 1);
831 ret = rtl2832_sdr_wr_regs(s, 0x109, "\x7f", 1);
832 ret = rtl2832_sdr_wr_regs(s, 0x10a, "\x80", 1);
833 ret = rtl2832_sdr_wr_regs(s, 0x10b, "\x7f", 1);
834 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
835 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
836 ret = rtl2832_sdr_wr_regs(s, 0x011, "\xe9\xbf", 2);
837 ret = rtl2832_sdr_wr_regs(s, 0x1e5, "\xf0", 1);
838 ret = rtl2832_sdr_wr_regs(s, 0x1d9, "\x00", 1);
839 ret = rtl2832_sdr_wr_regs(s, 0x1db, "\x00", 1);
840 ret = rtl2832_sdr_wr_regs(s, 0x1dd, "\x11", 1);
841 ret = rtl2832_sdr_wr_regs(s, 0x1de, "\xef", 1);
842 ret = rtl2832_sdr_wr_regs(s, 0x1d8, "\x0c", 1);
843 ret = rtl2832_sdr_wr_regs(s, 0x1e6, "\x02", 1);
844 ret = rtl2832_sdr_wr_regs(s, 0x1d7, "\x09", 1);
845 break;
846 case RTL2832_TUNER_R820T:
847 ret = rtl2832_sdr_wr_regs(s, 0x112, "\x5a", 1);
848 ret = rtl2832_sdr_wr_regs(s, 0x102, "\x40", 1);
849 ret = rtl2832_sdr_wr_regs(s, 0x115, "\x01", 1);
850 ret = rtl2832_sdr_wr_regs(s, 0x103, "\x80", 1);
851 ret = rtl2832_sdr_wr_regs(s, 0x1c7, "\x24", 1);
852 ret = rtl2832_sdr_wr_regs(s, 0x104, "\xcc", 1);
853 ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1);
854 ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x14", 1);
855 ret = rtl2832_sdr_wr_regs(s, 0x106, "\x35", 1);
856 ret = rtl2832_sdr_wr_regs(s, 0x1c9, "\x21", 1);
857 ret = rtl2832_sdr_wr_regs(s, 0x1ca, "\x21", 1);
858 ret = rtl2832_sdr_wr_regs(s, 0x1cb, "\x00", 1);
859 ret = rtl2832_sdr_wr_regs(s, 0x107, "\x40", 1);
860 ret = rtl2832_sdr_wr_regs(s, 0x1cd, "\x10", 1);
861 ret = rtl2832_sdr_wr_regs(s, 0x1ce, "\x10", 1);
862 ret = rtl2832_sdr_wr_regs(s, 0x108, "\x80", 1);
863 ret = rtl2832_sdr_wr_regs(s, 0x109, "\x7f", 1);
864 ret = rtl2832_sdr_wr_regs(s, 0x10a, "\x80", 1);
865 ret = rtl2832_sdr_wr_regs(s, 0x10b, "\x7f", 1);
866 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
867 ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
868 ret = rtl2832_sdr_wr_regs(s, 0x011, "\xf4", 1);
869 break;
870 default:
871 dev_notice(&s->udev->dev, "Unsupported tuner\n");
872 }
873
874 /* software reset */
875 ret = rtl2832_sdr_wr_reg_mask(s, 0x101, 0x04, 0x04);
876 if (ret)
877 goto err;
878
879 ret = rtl2832_sdr_wr_reg_mask(s, 0x101, 0x00, 0x04);
880 if (ret)
881 goto err;
882 err:
883 return ret;
884 };
885
886 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_state *s)
887 {
888 int ret;
889
890 dev_dbg(&s->udev->dev, "%s:\n", __func__);
891
892 /* PID filter */
893 ret = rtl2832_sdr_wr_regs(s, 0x061, "\xe0", 1);
894 if (ret)
895 goto err;
896
897 /* mode */
898 ret = rtl2832_sdr_wr_regs(s, 0x019, "\x20", 1);
899 if (ret)
900 goto err;
901
902 ret = rtl2832_sdr_wr_regs(s, 0x017, "\x11\x10", 2);
903 if (ret)
904 goto err;
905
906 /* FSM */
907 ret = rtl2832_sdr_wr_regs(s, 0x192, "\x00\x0f\xff", 3);
908 if (ret)
909 goto err;
910
911 ret = rtl2832_sdr_wr_regs(s, 0x13e, "\x40\x00", 2);
912 if (ret)
913 goto err;
914
915 ret = rtl2832_sdr_wr_regs(s, 0x115, "\x06\x3f\xce\xcc", 4);
916 if (ret)
917 goto err;
918 err:
919 return;
920 };
921
922 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_state *s)
923 {
924 struct dvb_frontend *fe = s->fe;
925 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
926 struct v4l2_ctrl *bandwidth_auto;
927 struct v4l2_ctrl *bandwidth;
928
929 /*
930 * tuner RF (Hz)
931 */
932 if (s->f_tuner == 0)
933 return 0;
934
935 /*
936 * bandwidth (Hz)
937 */
938 bandwidth_auto = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
939 bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
940 if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
941 c->bandwidth_hz = s->f_adc;
942 v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);
943 } else {
944 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
945 }
946
947 c->frequency = s->f_tuner;
948 c->delivery_system = SYS_DVBT;
949
950 dev_dbg(&s->udev->dev, "%s: frequency=%u bandwidth=%d\n",
951 __func__, c->frequency, c->bandwidth_hz);
952
953 if (!test_bit(POWER_ON, &s->flags))
954 return 0;
955
956 if (fe->ops.tuner_ops.set_params)
957 fe->ops.tuner_ops.set_params(fe);
958
959 return 0;
960 };
961
962 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_state *s)
963 {
964 struct dvb_frontend *fe = s->fe;
965
966 dev_dbg(&s->udev->dev, "%s:\n", __func__);
967
968 if (fe->ops.tuner_ops.init)
969 fe->ops.tuner_ops.init(fe);
970
971 return 0;
972 };
973
974 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_state *s)
975 {
976 struct dvb_frontend *fe = s->fe;
977
978 dev_dbg(&s->udev->dev, "%s:\n", __func__);
979
980 if (fe->ops.tuner_ops.sleep)
981 fe->ops.tuner_ops.sleep(fe);
982
983 return;
984 };
985
986 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
987 {
988 struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
989 int ret;
990 dev_dbg(&s->udev->dev, "%s:\n", __func__);
991
992 if (!s->udev)
993 return -ENODEV;
994
995 if (mutex_lock_interruptible(&s->v4l2_lock))
996 return -ERESTARTSYS;
997
998 if (s->d->props->power_ctrl)
999 s->d->props->power_ctrl(s->d, 1);
1000
1001 set_bit(POWER_ON, &s->flags);
1002
1003 ret = rtl2832_sdr_set_tuner(s);
1004 if (ret)
1005 goto err;
1006
1007 ret = rtl2832_sdr_set_tuner_freq(s);
1008 if (ret)
1009 goto err;
1010
1011 ret = rtl2832_sdr_set_adc(s);
1012 if (ret)
1013 goto err;
1014
1015 ret = rtl2832_sdr_alloc_stream_bufs(s);
1016 if (ret)
1017 goto err;
1018
1019 ret = rtl2832_sdr_alloc_urbs(s);
1020 if (ret)
1021 goto err;
1022
1023 s->sequence = 0;
1024
1025 ret = rtl2832_sdr_submit_urbs(s);
1026 if (ret)
1027 goto err;
1028
1029 err:
1030 mutex_unlock(&s->v4l2_lock);
1031
1032 return ret;
1033 }
1034
1035 static int rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
1036 {
1037 struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
1038 dev_dbg(&s->udev->dev, "%s:\n", __func__);
1039
1040 if (mutex_lock_interruptible(&s->v4l2_lock))
1041 return -ERESTARTSYS;
1042
1043 rtl2832_sdr_kill_urbs(s);
1044 rtl2832_sdr_free_urbs(s);
1045 rtl2832_sdr_free_stream_bufs(s);
1046 rtl2832_sdr_cleanup_queued_bufs(s);
1047 rtl2832_sdr_unset_adc(s);
1048 rtl2832_sdr_unset_tuner(s);
1049
1050 clear_bit(POWER_ON, &s->flags);
1051
1052 if (s->d->props->power_ctrl)
1053 s->d->props->power_ctrl(s->d, 0);
1054
1055 mutex_unlock(&s->v4l2_lock);
1056
1057 return 0;
1058 }
1059
1060 static struct vb2_ops rtl2832_sdr_vb2_ops = {
1061 .queue_setup = rtl2832_sdr_queue_setup,
1062 .buf_prepare = rtl2832_sdr_buf_prepare,
1063 .buf_queue = rtl2832_sdr_buf_queue,
1064 .start_streaming = rtl2832_sdr_start_streaming,
1065 .stop_streaming = rtl2832_sdr_stop_streaming,
1066 .wait_prepare = vb2_ops_wait_prepare,
1067 .wait_finish = vb2_ops_wait_finish,
1068 };
1069
1070 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
1071 struct v4l2_tuner *v)
1072 {
1073 struct rtl2832_sdr_state *s = video_drvdata(file);
1074 dev_dbg(&s->udev->dev, "%s: index=%d type=%d\n",
1075 __func__, v->index, v->type);
1076
1077 if (v->index == 0) {
1078 strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
1079 v->type = V4L2_TUNER_ADC;
1080 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1081 v->rangelow = 300000;
1082 v->rangehigh = 3200000;
1083 } else if (v->index == 1) {
1084 strlcpy(v->name, "RF: <unknown>", sizeof(v->name));
1085 v->type = V4L2_TUNER_RF;
1086 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1087 v->rangelow = 50000000;
1088 v->rangehigh = 2000000000;
1089 } else {
1090 return -EINVAL;
1091 }
1092
1093 return 0;
1094 }
1095
1096 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
1097 const struct v4l2_tuner *v)
1098 {
1099 struct rtl2832_sdr_state *s = video_drvdata(file);
1100 dev_dbg(&s->udev->dev, "%s:\n", __func__);
1101
1102 if (v->index > 1)
1103 return -EINVAL;
1104 return 0;
1105 }
1106
1107 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1108 struct v4l2_frequency_band *band)
1109 {
1110 struct rtl2832_sdr_state *s = video_drvdata(file);
1111 dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n",
1112 __func__, band->tuner, band->type, band->index);
1113
1114 if (band->tuner == 0) {
1115 if (band->index >= ARRAY_SIZE(bands_adc))
1116 return -EINVAL;
1117
1118 *band = bands_adc[band->index];
1119 } else if (band->tuner == 1) {
1120 if (band->index >= ARRAY_SIZE(bands_fm))
1121 return -EINVAL;
1122
1123 *band = bands_fm[band->index];
1124 } else {
1125 return -EINVAL;
1126 }
1127
1128 return 0;
1129 }
1130
1131 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1132 struct v4l2_frequency *f)
1133 {
1134 struct rtl2832_sdr_state *s = video_drvdata(file);
1135 int ret = 0;
1136 dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n",
1137 __func__, f->tuner, f->type);
1138
1139 if (f->tuner == 0) {
1140 f->frequency = s->f_adc;
1141 f->type = V4L2_TUNER_ADC;
1142 } else if (f->tuner == 1) {
1143 f->frequency = s->f_tuner;
1144 f->type = V4L2_TUNER_RF;
1145 } else {
1146 return -EINVAL;
1147 }
1148
1149 return ret;
1150 }
1151
1152 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1153 const struct v4l2_frequency *f)
1154 {
1155 struct rtl2832_sdr_state *s = video_drvdata(file);
1156 int ret, band;
1157
1158 dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n",
1159 __func__, f->tuner, f->type, f->frequency);
1160
1161 /* ADC band midpoints */
1162 #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1163 #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1164
1165 if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1166 if (f->frequency < BAND_ADC_0)
1167 band = 0;
1168 else if (f->frequency < BAND_ADC_1)
1169 band = 1;
1170 else
1171 band = 2;
1172
1173 s->f_adc = clamp_t(unsigned int, f->frequency,
1174 bands_adc[band].rangelow,
1175 bands_adc[band].rangehigh);
1176
1177 dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n",
1178 __func__, s->f_adc);
1179 ret = rtl2832_sdr_set_adc(s);
1180 } else if (f->tuner == 1) {
1181 s->f_tuner = clamp_t(unsigned int, f->frequency,
1182 bands_fm[0].rangelow,
1183 bands_fm[0].rangehigh);
1184 dev_dbg(&s->udev->dev, "%s: RF frequency=%u Hz\n",
1185 __func__, f->frequency);
1186
1187 ret = rtl2832_sdr_set_tuner_freq(s);
1188 } else {
1189 ret = -EINVAL;
1190 }
1191
1192 return ret;
1193 }
1194
1195 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1196 struct v4l2_fmtdesc *f)
1197 {
1198 struct rtl2832_sdr_state *s = video_drvdata(file);
1199 dev_dbg(&s->udev->dev, "%s:\n", __func__);
1200
1201 if (f->index >= NUM_FORMATS)
1202 return -EINVAL;
1203
1204 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
1205 f->pixelformat = formats[f->index].pixelformat;
1206
1207 return 0;
1208 }
1209
1210 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1211 struct v4l2_format *f)
1212 {
1213 struct rtl2832_sdr_state *s = video_drvdata(file);
1214 dev_dbg(&s->udev->dev, "%s:\n", __func__);
1215
1216 f->fmt.sdr.pixelformat = s->pixelformat;
1217 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1218
1219 return 0;
1220 }
1221
1222 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1223 struct v4l2_format *f)
1224 {
1225 struct rtl2832_sdr_state *s = video_drvdata(file);
1226 struct vb2_queue *q = &s->vb_queue;
1227 int i;
1228 dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
1229 (char *)&f->fmt.sdr.pixelformat);
1230
1231 if (vb2_is_busy(q))
1232 return -EBUSY;
1233
1234 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1235 for (i = 0; i < NUM_FORMATS; i++) {
1236 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1237 s->pixelformat = f->fmt.sdr.pixelformat;
1238 return 0;
1239 }
1240 }
1241
1242 f->fmt.sdr.pixelformat = formats[0].pixelformat;
1243 s->pixelformat = formats[0].pixelformat;
1244
1245 return 0;
1246 }
1247
1248 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1249 struct v4l2_format *f)
1250 {
1251 struct rtl2832_sdr_state *s = video_drvdata(file);
1252 int i;
1253 dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
1254 (char *)&f->fmt.sdr.pixelformat);
1255
1256 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1257 for (i = 0; i < NUM_FORMATS; i++) {
1258 if (formats[i].pixelformat == f->fmt.sdr.pixelformat)
1259 return 0;
1260 }
1261
1262 f->fmt.sdr.pixelformat = formats[0].pixelformat;
1263
1264 return 0;
1265 }
1266
1267 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1268 .vidioc_querycap = rtl2832_sdr_querycap,
1269
1270 .vidioc_enum_fmt_sdr_cap = rtl2832_sdr_enum_fmt_sdr_cap,
1271 .vidioc_g_fmt_sdr_cap = rtl2832_sdr_g_fmt_sdr_cap,
1272 .vidioc_s_fmt_sdr_cap = rtl2832_sdr_s_fmt_sdr_cap,
1273 .vidioc_try_fmt_sdr_cap = rtl2832_sdr_try_fmt_sdr_cap,
1274
1275 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1276 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1277 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1278 .vidioc_querybuf = vb2_ioctl_querybuf,
1279 .vidioc_qbuf = vb2_ioctl_qbuf,
1280 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1281
1282 .vidioc_streamon = vb2_ioctl_streamon,
1283 .vidioc_streamoff = vb2_ioctl_streamoff,
1284
1285 .vidioc_g_tuner = rtl2832_sdr_g_tuner,
1286 .vidioc_s_tuner = rtl2832_sdr_s_tuner,
1287
1288 .vidioc_enum_freq_bands = rtl2832_sdr_enum_freq_bands,
1289 .vidioc_g_frequency = rtl2832_sdr_g_frequency,
1290 .vidioc_s_frequency = rtl2832_sdr_s_frequency,
1291
1292 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1293 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1294 .vidioc_log_status = v4l2_ctrl_log_status,
1295 };
1296
1297 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1298 .owner = THIS_MODULE,
1299 .open = v4l2_fh_open,
1300 .release = vb2_fop_release,
1301 .read = vb2_fop_read,
1302 .poll = vb2_fop_poll,
1303 .mmap = vb2_fop_mmap,
1304 .unlocked_ioctl = video_ioctl2,
1305 };
1306
1307 static struct video_device rtl2832_sdr_template = {
1308 .name = "Realtek RTL2832 SDR",
1309 .release = video_device_release_empty,
1310 .fops = &rtl2832_sdr_fops,
1311 .ioctl_ops = &rtl2832_sdr_ioctl_ops,
1312 };
1313
1314 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1315 {
1316 struct rtl2832_sdr_state *s =
1317 container_of(ctrl->handler, struct rtl2832_sdr_state,
1318 hdl);
1319 struct dvb_frontend *fe = s->fe;
1320 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1321 int ret;
1322 dev_dbg(&s->udev->dev,
1323 "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
1324 __func__, ctrl->id, ctrl->name, ctrl->val,
1325 ctrl->minimum, ctrl->maximum, ctrl->step);
1326
1327 switch (ctrl->id) {
1328 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1329 case V4L2_CID_RF_TUNER_BANDWIDTH:
1330 /* TODO: these controls should be moved to tuner drivers */
1331 if (s->bandwidth_auto->val) {
1332 /* Round towards the closest legal value */
1333 s32 val = s->f_adc + s->bandwidth->step / 2;
1334 u32 offset;
1335 val = clamp(val, s->bandwidth->minimum, s->bandwidth->maximum);
1336 offset = val - s->bandwidth->minimum;
1337 offset = s->bandwidth->step * (offset / s->bandwidth->step);
1338 s->bandwidth->val = s->bandwidth->minimum + offset;
1339 }
1340
1341 c->bandwidth_hz = s->bandwidth->val;
1342
1343 if (!test_bit(POWER_ON, &s->flags))
1344 return 0;
1345
1346 if (fe->ops.tuner_ops.set_params)
1347 ret = fe->ops.tuner_ops.set_params(fe);
1348 else
1349 ret = 0;
1350 break;
1351 default:
1352 ret = -EINVAL;
1353 }
1354
1355 return ret;
1356 }
1357
1358 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1359 .s_ctrl = rtl2832_sdr_s_ctrl,
1360 };
1361
1362 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1363 {
1364 struct rtl2832_sdr_state *s =
1365 container_of(v, struct rtl2832_sdr_state, v4l2_dev);
1366
1367 v4l2_ctrl_handler_free(&s->hdl);
1368 v4l2_device_unregister(&s->v4l2_dev);
1369 kfree(s);
1370 }
1371
1372 struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
1373 struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
1374 struct v4l2_subdev *sd)
1375 {
1376 int ret;
1377 struct rtl2832_sdr_state *s;
1378 const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1379 struct dvb_usb_device *d = i2c_get_adapdata(i2c);
1380
1381 s = kzalloc(sizeof(struct rtl2832_sdr_state), GFP_KERNEL);
1382 if (s == NULL) {
1383 dev_err(&d->udev->dev,
1384 "Could not allocate memory for rtl2832_sdr_state\n");
1385 return NULL;
1386 }
1387
1388 /* setup the state */
1389 s->fe = fe;
1390 s->d = d;
1391 s->udev = d->udev;
1392 s->i2c = i2c;
1393 s->cfg = cfg;
1394 s->f_adc = bands_adc[0].rangelow;
1395 s->f_tuner = bands_fm[0].rangelow;
1396 s->pixelformat = V4L2_SDR_FMT_CU8;
1397
1398 mutex_init(&s->v4l2_lock);
1399 mutex_init(&s->vb_queue_lock);
1400 spin_lock_init(&s->queued_bufs_lock);
1401 INIT_LIST_HEAD(&s->queued_bufs);
1402
1403 /* Init videobuf2 queue structure */
1404 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1405 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1406 s->vb_queue.drv_priv = s;
1407 s->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1408 s->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1409 s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1410 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1411 ret = vb2_queue_init(&s->vb_queue);
1412 if (ret) {
1413 dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
1414 goto err_free_mem;
1415 }
1416
1417 /* Register controls */
1418 switch (s->cfg->tuner) {
1419 case RTL2832_TUNER_E4000:
1420 v4l2_ctrl_handler_init(&s->hdl, 9);
1421 if (sd)
1422 v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL);
1423 break;
1424 case RTL2832_TUNER_R820T:
1425 v4l2_ctrl_handler_init(&s->hdl, 2);
1426 s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
1427 s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_RF_TUNER_BANDWIDTH, 0, 8000000, 100000, 0);
1428 v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
1429 break;
1430 case RTL2832_TUNER_FC0012:
1431 case RTL2832_TUNER_FC0013:
1432 v4l2_ctrl_handler_init(&s->hdl, 2);
1433 s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
1434 s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_RF_TUNER_BANDWIDTH, 6000000, 8000000, 1000000, 6000000);
1435 v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
1436 break;
1437 default:
1438 v4l2_ctrl_handler_init(&s->hdl, 0);
1439 dev_notice(&s->udev->dev, "%s: Unsupported tuner\n",
1440 KBUILD_MODNAME);
1441 goto err_free_controls;
1442 }
1443
1444 if (s->hdl.error) {
1445 ret = s->hdl.error;
1446 dev_err(&s->udev->dev, "Could not initialize controls\n");
1447 goto err_free_controls;
1448 }
1449
1450 /* Init video_device structure */
1451 s->vdev = rtl2832_sdr_template;
1452 s->vdev.queue = &s->vb_queue;
1453 s->vdev.queue->lock = &s->vb_queue_lock;
1454 set_bit(V4L2_FL_USE_FH_PRIO, &s->vdev.flags);
1455 video_set_drvdata(&s->vdev, s);
1456
1457 /* Register the v4l2_device structure */
1458 s->v4l2_dev.release = rtl2832_sdr_video_release;
1459 ret = v4l2_device_register(&s->udev->dev, &s->v4l2_dev);
1460 if (ret) {
1461 dev_err(&s->udev->dev,
1462 "Failed to register v4l2-device (%d)\n", ret);
1463 goto err_free_controls;
1464 }
1465
1466 s->v4l2_dev.ctrl_handler = &s->hdl;
1467 s->vdev.v4l2_dev = &s->v4l2_dev;
1468 s->vdev.lock = &s->v4l2_lock;
1469 s->vdev.vfl_dir = VFL_DIR_RX;
1470
1471 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1472 if (ret) {
1473 dev_err(&s->udev->dev,
1474 "Failed to register as video device (%d)\n",
1475 ret);
1476 goto err_unregister_v4l2_dev;
1477 }
1478 dev_info(&s->udev->dev, "Registered as %s\n",
1479 video_device_node_name(&s->vdev));
1480
1481 fe->sec_priv = s;
1482 fe->ops.release_sec = rtl2832_sdr_release_sec;
1483
1484 dev_info(&s->i2c->dev, "%s: Realtek RTL2832 SDR attached\n",
1485 KBUILD_MODNAME);
1486 return fe;
1487
1488 err_unregister_v4l2_dev:
1489 v4l2_device_unregister(&s->v4l2_dev);
1490 err_free_controls:
1491 v4l2_ctrl_handler_free(&s->hdl);
1492 err_free_mem:
1493 kfree(s);
1494 return NULL;
1495 }
1496 EXPORT_SYMBOL(rtl2832_sdr_attach);
1497
1498 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1499 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1500 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.066961 seconds and 5 git commands to generate.