1/* $NetBSD: emdtv_dtv.c,v 1.12 2016/04/23 10:15:31 skrll Exp $ */
2
3/*-
4 * Copyright (c) 2008, 2011 Jared D. McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: emdtv_dtv.c,v 1.12 2016/04/23 10:15:31 skrll Exp $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/device.h>
35#include <sys/lwp.h>
36#include <sys/conf.h>
37
38#include <dev/usb/usb.h>
39#include <dev/usb/usbdi.h>
40#include <dev/usb/usbdi_util.h>
41#include <dev/usb/usbdivar.h>
42#include <dev/usb/usbdevs.h>
43
44#include <dev/i2c/i2cvar.h>
45
46#include <dev/usb/emdtvvar.h>
47#include <dev/usb/emdtvreg.h>
48
49static void emdtv_dtv_get_devinfo(void *,
50 struct dvb_frontend_info *);
51static int emdtv_dtv_open(void *, int);
52static void emdtv_dtv_close(void *);
53static int emdtv_dtv_set_tuner(void *,
54 const struct dvb_frontend_parameters *);
55static fe_status_t emdtv_dtv_get_status(void *);
56static uint16_t emdtv_dtv_get_signal_strength(void *);
57static uint16_t emdtv_dtv_get_snr(void *);
58static int emdtv_dtv_start_transfer(void *,
59 void (*)(void *, const struct dtv_payload *),
60 void *);
61static int emdtv_dtv_stop_transfer(void *);
62
63static int emdtv_dtv_tuner_reset(void *);
64
65static void emdtv_dtv_isoc_startall(struct emdtv_softc *);
66static int emdtv_dtv_isoc_start(struct emdtv_softc *,
67 struct emdtv_isoc_xfer *);
68static void emdtv_dtv_isoc(struct usbd_xfer *, void *,
69 usbd_status);
70
71static const struct dtv_hw_if emdtv_dtv_if = {
72 .get_devinfo = emdtv_dtv_get_devinfo,
73 .open = emdtv_dtv_open,
74 .close = emdtv_dtv_close,
75 .set_tuner = emdtv_dtv_set_tuner,
76 .get_status = emdtv_dtv_get_status,
77 .get_signal_strength = emdtv_dtv_get_signal_strength,
78 .get_snr = emdtv_dtv_get_snr,
79 .start_transfer = emdtv_dtv_start_transfer,
80 .stop_transfer = emdtv_dtv_stop_transfer,
81};
82
83void
84emdtv_dtv_attach(struct emdtv_softc *sc)
85{
86 usb_endpoint_descriptor_t *ed;
87 usbd_status status;
88 int i;
89
90 for (i = 0; i < EMDTV_NXFERS; i++) {
91 sc->sc_ix[i].ix_altix = (i & 1) ?
92 &sc->sc_ix[i - 1] : &sc->sc_ix[i + 1];
93 sc->sc_ix[i].ix_sc = sc;
94 }
95
96 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 3);
97 if (ed == NULL) {
98 aprint_error_dev(sc->sc_dev, "couldn't find endpoint 3\n");
99 return;
100 }
101 sc->sc_isoc_maxpacketsize = UGETW(ed->wMaxPacketSize);
102 sc->sc_isoc_buflen = sc->sc_isoc_maxpacketsize * EMDTV_NFRAMES;
103
104 aprint_debug_dev(sc->sc_dev, "calling usbd_open_pipe, ep 0x%02x\n",
105 ed->bEndpointAddress);
106 status = usbd_open_pipe(sc->sc_iface,
107 ed->bEndpointAddress, USBD_EXCLUSIVE_USE|USBD_MPSAFE,
108 &sc->sc_isoc_pipe);
109 if (status != USBD_NORMAL_COMPLETION) {
110 aprint_error_dev(sc->sc_dev, "couldn't open isoc pipe\n");
111 usbd_set_interface(sc->sc_iface, 0);
112 return;
113 }
114
115 emdtv_write_1(sc, UR_GET_STATUS, 0x48, 0x00);
116 emdtv_write_1(sc, UR_GET_STATUS, 0x12, 0x77);
117 usbd_delay_ms(sc->sc_udev, 6);
118
119 emdtv_gpio_ctl(sc, EMDTV_GPIO_ANALOG_ON, false);
120 emdtv_gpio_ctl(sc, EMDTV_GPIO_TS1_ON, true);
121 emdtv_gpio_ctl(sc, EMDTV_GPIO_TUNER1_ON, true);
122 emdtv_gpio_ctl(sc, EMDTV_GPIO_DEMOD1_RESET, true);
123 usbd_delay_ms(sc->sc_udev, 100);
124
125 emdtv_dtv_rescan(sc, NULL, NULL);
126}
127
128static void
129emdtv_dtv_free_xfers(struct emdtv_softc *sc)
130{
131
132 for (size_t i = 0; i < EMDTV_NXFERS; i++)
133 if (sc->sc_ix[i].ix_xfer) {
134 usbd_destroy_xfer(sc->sc_ix[i].ix_xfer);
135 sc->sc_ix[i].ix_xfer = NULL;
136 sc->sc_ix[i].ix_buf = NULL;
137 }
138
139 return;
140}
141
142void
143emdtv_dtv_detach(struct emdtv_softc *sc, int flags)
144{
145 sc->sc_streaming = false;
146
147 if (sc->sc_dtvdev != NULL) {
148 config_detach(sc->sc_dtvdev, flags);
149 sc->sc_dtvdev = NULL;
150 }
151
152 if (sc->sc_xc3028)
153 xc3028_close(sc->sc_xc3028);
154 if (sc->sc_lg3303)
155 lg3303_close(sc->sc_lg3303);
156
157 if (sc->sc_isoc_pipe) {
158 usbd_abort_pipe(sc->sc_isoc_pipe);
159 emdtv_dtv_free_xfers(sc);
160 usbd_close_pipe(sc->sc_isoc_pipe);
161 sc->sc_isoc_pipe = NULL;
162 }
163}
164
165void
166emdtv_dtv_rescan(struct emdtv_softc *sc, const char *ifattr, const int *locs)
167{
168 struct dtv_attach_args daa;
169
170 daa.hw = &emdtv_dtv_if;
171 daa.priv = sc;
172
173 if (ifattr_match(ifattr, "dtvbus") && sc->sc_dtvdev == NULL)
174 sc->sc_dtvdev = config_found_ia(sc->sc_dev, "dtvbus",
175 &daa, dtv_print);
176}
177
178static void
179emdtv_dtv_get_devinfo(void *priv, struct dvb_frontend_info *info)
180{
181 struct emdtv_softc *sc = priv;
182
183 memset(info, 0, sizeof(*info));
184 strlcpy(info->name, sc->sc_board->eb_name, sizeof(info->name));
185 info->type = FE_ATSC;
186 info->frequency_min = 54000000;
187 info->frequency_max = 858000000;
188 info->frequency_stepsize = 62500;
189 info->caps = FE_CAN_8VSB;
190}
191
192static int
193emdtv_dtv_open(void *priv, int flags)
194{
195 struct emdtv_softc *sc = priv;
196
197 if (sc->sc_dying)
198 return ENXIO;
199
200 aprint_debug_dev(sc->sc_dev, "allocating isoc xfers (pktsz %d)\n",
201 sc->sc_isoc_maxpacketsize);
202
203 for (size_t i = 0; i < EMDTV_NXFERS; i++) {
204 int error = usbd_create_xfer(sc->sc_isoc_pipe,
205 sc->sc_isoc_buflen, USBD_SHORT_XFER_OK, EMDTV_NFRAMES,
206 &sc->sc_ix[i].ix_xfer);
207 if (error)
208 return error;
209 sc->sc_ix[i].ix_buf = usbd_get_buffer(sc->sc_ix[i].ix_xfer);
210 aprint_debug_dev(sc->sc_dev, " ix[%zu] xfer %p buf %p\n",
211 i, sc->sc_ix[i].ix_xfer, sc->sc_ix[i].ix_buf);
212 }
213
214 switch (sc->sc_board->eb_tuner) {
215 case EMDTV_TUNER_XC3028:
216 if (sc->sc_xc3028 == NULL) {
217 sc->sc_xc3028 = xc3028_open(sc->sc_dev,
218 &sc->sc_i2c, 0x61 << 1, emdtv_dtv_tuner_reset, sc,
219 XC3028);
220 }
221 if (sc->sc_xc3028 == NULL) {
222 aprint_error_dev(sc->sc_dev, "couldn't open xc3028\n");
223 return ENXIO;
224 }
225 break;
226 case EMDTV_TUNER_XC3028L:
227 if (sc->sc_xc3028 == NULL) {
228 sc->sc_xc3028 = xc3028_open(sc->sc_dev,
229 &sc->sc_i2c, 0x61 << 1, emdtv_dtv_tuner_reset, sc,
230 XC3028L);
231 }
232 if (sc->sc_xc3028 == NULL) {
233 aprint_error_dev(sc->sc_dev, "couldn't open xc3028l\n");
234 return ENXIO;
235 }
236 break;
237 default:
238 aprint_error_dev(sc->sc_dev, "unsupported tuner (%d)\n",
239 sc->sc_board->eb_tuner);
240 return EIO;
241 }
242
243 switch (sc->sc_board->eb_demod) {
244 case EMDTV_DEMOD_LG3303:
245 if (sc->sc_lg3303 == NULL) {
246 sc->sc_lg3303 = lg3303_open(sc->sc_dev,
247 &sc->sc_i2c, 0x1c, 0);
248 }
249 if (sc->sc_lg3303 == NULL) {
250 aprint_error_dev(sc->sc_dev, "couldn't open lg3303\n");
251 return ENXIO;
252 }
253 break;
254 default:
255 aprint_error_dev(sc->sc_dev, "unsupported demod (%d)\n",
256 sc->sc_board->eb_demod);
257 return EIO;
258 }
259
260 return 0;
261}
262
263static void
264emdtv_dtv_close(void *priv)
265{
266 struct emdtv_softc *sc = priv;
267
268 emdtv_dtv_free_xfers(sc);
269}
270
271static int
272emdtv_dtv_set_tuner(void *priv, const struct dvb_frontend_parameters *params)
273{
274 struct emdtv_softc *sc = priv;
275 int error;
276
277 /* Setup demod */
278 error = ENXIO;
279 if (sc->sc_lg3303)
280 error = lg3303_set_modulation(sc->sc_lg3303,
281 params->u.vsb.modulation);
282 if (error)
283 return error;
284
285 /* Setup tuner */
286 error = ENXIO;
287 if (sc->sc_xc3028)
288 error = xc3028_tune_dtv(sc->sc_xc3028, params);
289
290 return error;
291}
292
293static fe_status_t
294emdtv_dtv_get_status(void *priv)
295{
296 struct emdtv_softc *sc = priv;
297
298 if (sc->sc_lg3303)
299 return lg3303_get_dtv_status(sc->sc_lg3303);
300
301 return 0;
302}
303
304uint16_t
305emdtv_dtv_get_signal_strength(void *priv)
306{
307 struct emdtv_softc *sc = priv;
308
309 if (sc->sc_lg3303)
310 return lg3303_get_signal_strength(sc->sc_lg3303);
311
312 return 0;
313}
314
315uint16_t
316emdtv_dtv_get_snr(void *priv)
317{
318 struct emdtv_softc *sc = priv;
319
320 if (sc->sc_lg3303)
321 return lg3303_get_snr(sc->sc_lg3303);
322
323 return 0;
324}
325
326static int
327emdtv_dtv_start_transfer(void *priv,
328 void (*cb)(void *, const struct dtv_payload *), void *arg)
329{
330 struct emdtv_softc *sc = priv;
331 int s;
332
333 s = splusb();
334
335 sc->sc_streaming = true;
336 sc->sc_dtvsubmitcb = cb;
337 sc->sc_dtvsubmitarg = arg;
338
339 aprint_debug_dev(sc->sc_dev, "starting isoc transactions\n");
340
341 emdtv_dtv_isoc_startall(sc);
342 splx(s);
343
344 return 0;
345}
346
347static int
348emdtv_dtv_stop_transfer(void *priv)
349{
350 struct emdtv_softc *sc = priv;
351
352 aprint_debug_dev(sc->sc_dev, "stopping stream\n");
353
354 sc->sc_streaming = false;
355
356 KERNEL_LOCK(1, curlwp);
357 if (sc->sc_isoc_pipe != NULL)
358 usbd_abort_pipe(sc->sc_isoc_pipe);
359 KERNEL_UNLOCK_ONE(curlwp);
360
361 sc->sc_dtvsubmitcb = NULL;
362 sc->sc_dtvsubmitarg = NULL;
363
364 return 0;
365}
366
367static void
368emdtv_dtv_isoc_startall(struct emdtv_softc *sc)
369{
370 int i;
371
372 if (sc->sc_streaming == false || sc->sc_dying == true)
373 return;
374
375 for (i = 0; i < EMDTV_NXFERS; i += 2)
376 emdtv_dtv_isoc_start(sc, &sc->sc_ix[i]);
377}
378
379static int
380emdtv_dtv_isoc_start(struct emdtv_softc *sc, struct emdtv_isoc_xfer *ix)
381{
382 int i;
383
384 if (sc->sc_isoc_pipe == NULL)
385 return EIO;
386
387 for (i = 0; i < EMDTV_NFRAMES; i++)
388 ix->ix_frlengths[i] = sc->sc_isoc_maxpacketsize;
389
390 usbd_setup_isoc_xfer(ix->ix_xfer,
391 ix,
392 ix->ix_frlengths,
393 EMDTV_NFRAMES,
394 USBD_SHORT_XFER_OK,
395 emdtv_dtv_isoc);
396
397 KERNEL_LOCK(1, curlwp);
398 usbd_transfer(ix->ix_xfer);
399 KERNEL_UNLOCK_ONE(curlwp);
400
401 return 0;
402}
403
404static void
405emdtv_dtv_isoc(struct usbd_xfer *xfer, void * priv,
406 usbd_status err)
407{
408 struct emdtv_isoc_xfer *ix = priv;
409 struct emdtv_softc *sc = ix->ix_sc;
410 struct dtv_payload payload;
411 struct usbd_pipe *isoc = sc->sc_isoc_pipe;
412 uint32_t len;
413 uint8_t *buf;
414 int i;
415
416 KASSERT(xfer == ix->ix_xfer);
417
418 if (sc->sc_dying || sc->sc_dtvsubmitcb == NULL)
419 return;
420
421 if (err) {
422 if (err == USBD_STALLED) {
423 usbd_clear_endpoint_stall_async(isoc);
424 goto resched;
425 }
426 return;
427 }
428
429 usbd_get_xfer_status(xfer, NULL, NULL, &len, NULL);
430
431 if (len == 0)
432 goto resched;
433
434 buf = usbd_get_buffer(xfer);
435 if (buf == NULL)
436 goto resched;
437
438 for (i = 0; i < EMDTV_NFRAMES; i++, buf += sc->sc_isoc_maxpacketsize) {
439 if (ix->ix_frlengths[i] == 0)
440 continue;
441 payload.data = buf;
442 payload.size = ix->ix_frlengths[i];
443 sc->sc_dtvsubmitcb(sc->sc_dtvsubmitarg, &payload);
444 }
445
446resched:
447 emdtv_dtv_isoc_start(sc, ix->ix_altix);
448}
449
450static int
451emdtv_dtv_tuner_reset(void *opaque)
452{
453 struct emdtv_softc *sc = opaque;
454 emdtv_gpio_ctl(sc, EMDTV_GPIO_TUNER1_RESET, true);
455 return 0;
456}
457