diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-13 22:13:41 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-13 22:13:41 -0400 |
commit | 9a0bf528b4d66b605f02634236da085595c22101 (patch) | |
tree | e9ff008ff15c3ee5add6d41173ee5e61939480dd /drivers/media/dvb-frontends/lgdt330x.c | |
parent | 3d6c2bc08ac4f75bf3597740357c98f2207ca412 (diff) |
[media] move the dvb/frontends to drivers/media/dvb-frontends
Raise the DVB frontends one level up, as the intention is to remove
the drivers/media/dvb directory.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb-frontends/lgdt330x.c')
-rw-r--r-- | drivers/media/dvb-frontends/lgdt330x.c | 831 |
1 files changed, 831 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/lgdt330x.c b/drivers/media/dvb-frontends/lgdt330x.c new file mode 100644 index 000000000000..e046622df0e4 --- /dev/null +++ b/drivers/media/dvb-frontends/lgdt330x.c | |||
@@ -0,0 +1,831 @@ | |||
1 | /* | ||
2 | * Support for LGDT3302 and LGDT3303 - VSB/QAM | ||
3 | * | ||
4 | * Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net> | ||
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 | ||
17 | * along with this program; if not, write to the Free Software | ||
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
19 | * | ||
20 | */ | ||
21 | |||
22 | /* | ||
23 | * NOTES ABOUT THIS DRIVER | ||
24 | * | ||
25 | * This Linux driver supports: | ||
26 | * DViCO FusionHDTV 3 Gold-Q | ||
27 | * DViCO FusionHDTV 3 Gold-T | ||
28 | * DViCO FusionHDTV 5 Gold | ||
29 | * DViCO FusionHDTV 5 Lite | ||
30 | * DViCO FusionHDTV 5 USB Gold | ||
31 | * Air2PC/AirStar 2 ATSC 3rd generation (HD5000) | ||
32 | * pcHDTV HD5500 | ||
33 | * | ||
34 | */ | ||
35 | |||
36 | #include <linux/kernel.h> | ||
37 | #include <linux/module.h> | ||
38 | #include <linux/init.h> | ||
39 | #include <linux/delay.h> | ||
40 | #include <linux/string.h> | ||
41 | #include <linux/slab.h> | ||
42 | #include <asm/byteorder.h> | ||
43 | |||
44 | #include "dvb_frontend.h" | ||
45 | #include "dvb_math.h" | ||
46 | #include "lgdt330x_priv.h" | ||
47 | #include "lgdt330x.h" | ||
48 | |||
49 | /* Use Equalizer Mean Squared Error instead of Phaser Tracker MSE */ | ||
50 | /* #define USE_EQMSE */ | ||
51 | |||
52 | static int debug; | ||
53 | module_param(debug, int, 0644); | ||
54 | MODULE_PARM_DESC(debug,"Turn on/off lgdt330x frontend debugging (default:off)."); | ||
55 | #define dprintk(args...) \ | ||
56 | do { \ | ||
57 | if (debug) printk(KERN_DEBUG "lgdt330x: " args); \ | ||
58 | } while (0) | ||
59 | |||
60 | struct lgdt330x_state | ||
61 | { | ||
62 | struct i2c_adapter* i2c; | ||
63 | |||
64 | /* Configuration settings */ | ||
65 | const struct lgdt330x_config* config; | ||
66 | |||
67 | struct dvb_frontend frontend; | ||
68 | |||
69 | /* Demodulator private data */ | ||
70 | fe_modulation_t current_modulation; | ||
71 | u32 snr; /* Result of last SNR calculation */ | ||
72 | |||
73 | /* Tuner private data */ | ||
74 | u32 current_frequency; | ||
75 | }; | ||
76 | |||
77 | static int i2c_write_demod_bytes (struct lgdt330x_state* state, | ||
78 | u8 *buf, /* data bytes to send */ | ||
79 | int len /* number of bytes to send */ ) | ||
80 | { | ||
81 | struct i2c_msg msg = | ||
82 | { .addr = state->config->demod_address, | ||
83 | .flags = 0, | ||
84 | .buf = buf, | ||
85 | .len = 2 }; | ||
86 | int i; | ||
87 | int err; | ||
88 | |||
89 | for (i=0; i<len-1; i+=2){ | ||
90 | if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { | ||
91 | printk(KERN_WARNING "lgdt330x: %s error (addr %02x <- %02x, err = %i)\n", __func__, msg.buf[0], msg.buf[1], err); | ||
92 | if (err < 0) | ||
93 | return err; | ||
94 | else | ||
95 | return -EREMOTEIO; | ||
96 | } | ||
97 | msg.buf += 2; | ||
98 | } | ||
99 | return 0; | ||
100 | } | ||
101 | |||
102 | /* | ||
103 | * This routine writes the register (reg) to the demod bus | ||
104 | * then reads the data returned for (len) bytes. | ||
105 | */ | ||
106 | |||
107 | static int i2c_read_demod_bytes(struct lgdt330x_state *state, | ||
108 | enum I2C_REG reg, u8 *buf, int len) | ||
109 | { | ||
110 | u8 wr [] = { reg }; | ||
111 | struct i2c_msg msg [] = { | ||
112 | { .addr = state->config->demod_address, | ||
113 | .flags = 0, .buf = wr, .len = 1 }, | ||
114 | { .addr = state->config->demod_address, | ||
115 | .flags = I2C_M_RD, .buf = buf, .len = len }, | ||
116 | }; | ||
117 | int ret; | ||
118 | ret = i2c_transfer(state->i2c, msg, 2); | ||
119 | if (ret != 2) { | ||
120 | printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __func__, state->config->demod_address, reg, ret); | ||
121 | if (ret >= 0) | ||
122 | ret = -EIO; | ||
123 | } else { | ||
124 | ret = 0; | ||
125 | } | ||
126 | return ret; | ||
127 | } | ||
128 | |||
129 | /* Software reset */ | ||
130 | static int lgdt3302_SwReset(struct lgdt330x_state* state) | ||
131 | { | ||
132 | u8 ret; | ||
133 | u8 reset[] = { | ||
134 | IRQ_MASK, | ||
135 | 0x00 /* bit 6 is active low software reset | ||
136 | * bits 5-0 are 1 to mask interrupts */ | ||
137 | }; | ||
138 | |||
139 | ret = i2c_write_demod_bytes(state, | ||
140 | reset, sizeof(reset)); | ||
141 | if (ret == 0) { | ||
142 | |||
143 | /* force reset high (inactive) and unmask interrupts */ | ||
144 | reset[1] = 0x7f; | ||
145 | ret = i2c_write_demod_bytes(state, | ||
146 | reset, sizeof(reset)); | ||
147 | } | ||
148 | return ret; | ||
149 | } | ||
150 | |||
151 | static int lgdt3303_SwReset(struct lgdt330x_state* state) | ||
152 | { | ||
153 | u8 ret; | ||
154 | u8 reset[] = { | ||
155 | 0x02, | ||
156 | 0x00 /* bit 0 is active low software reset */ | ||
157 | }; | ||
158 | |||
159 | ret = i2c_write_demod_bytes(state, | ||
160 | reset, sizeof(reset)); | ||
161 | if (ret == 0) { | ||
162 | |||
163 | /* force reset high (inactive) */ | ||
164 | reset[1] = 0x01; | ||
165 | ret = i2c_write_demod_bytes(state, | ||
166 | reset, sizeof(reset)); | ||
167 | } | ||
168 | return ret; | ||
169 | } | ||
170 | |||
171 | static int lgdt330x_SwReset(struct lgdt330x_state* state) | ||
172 | { | ||
173 | switch (state->config->demod_chip) { | ||
174 | case LGDT3302: | ||
175 | return lgdt3302_SwReset(state); | ||
176 | case LGDT3303: | ||
177 | return lgdt3303_SwReset(state); | ||
178 | default: | ||
179 | return -ENODEV; | ||
180 | } | ||
181 | } | ||
182 | |||
183 | static int lgdt330x_init(struct dvb_frontend* fe) | ||
184 | { | ||
185 | /* Hardware reset is done using gpio[0] of cx23880x chip. | ||
186 | * I'd like to do it here, but don't know how to find chip address. | ||
187 | * cx88-cards.c arranges for the reset bit to be inactive (high). | ||
188 | * Maybe there needs to be a callable function in cx88-core or | ||
189 | * the caller of this function needs to do it. */ | ||
190 | |||
191 | /* | ||
192 | * Array of byte pairs <address, value> | ||
193 | * to initialize each different chip | ||
194 | */ | ||
195 | static u8 lgdt3302_init_data[] = { | ||
196 | /* Use 50MHz parameter values from spec sheet since xtal is 50 */ | ||
197 | /* Change the value of NCOCTFV[25:0] of carrier | ||
198 | recovery center frequency register */ | ||
199 | VSB_CARRIER_FREQ0, 0x00, | ||
200 | VSB_CARRIER_FREQ1, 0x87, | ||
201 | VSB_CARRIER_FREQ2, 0x8e, | ||
202 | VSB_CARRIER_FREQ3, 0x01, | ||
203 | /* Change the TPCLK pin polarity | ||
204 | data is valid on falling clock */ | ||
205 | DEMUX_CONTROL, 0xfb, | ||
206 | /* Change the value of IFBW[11:0] of | ||
207 | AGC IF/RF loop filter bandwidth register */ | ||
208 | AGC_RF_BANDWIDTH0, 0x40, | ||
209 | AGC_RF_BANDWIDTH1, 0x93, | ||
210 | AGC_RF_BANDWIDTH2, 0x00, | ||
211 | /* Change the value of bit 6, 'nINAGCBY' and | ||
212 | 'NSSEL[1:0] of ACG function control register 2 */ | ||
213 | AGC_FUNC_CTRL2, 0xc6, | ||
214 | /* Change the value of bit 6 'RFFIX' | ||
215 | of AGC function control register 3 */ | ||
216 | AGC_FUNC_CTRL3, 0x40, | ||
217 | /* Set the value of 'INLVTHD' register 0x2a/0x2c | ||
218 | to 0x7fe */ | ||
219 | AGC_DELAY0, 0x07, | ||
220 | AGC_DELAY2, 0xfe, | ||
221 | /* Change the value of IAGCBW[15:8] | ||
222 | of inner AGC loop filter bandwidth */ | ||
223 | AGC_LOOP_BANDWIDTH0, 0x08, | ||
224 | AGC_LOOP_BANDWIDTH1, 0x9a | ||
225 | }; | ||
226 | |||
227 | static u8 lgdt3303_init_data[] = { | ||
228 | 0x4c, 0x14 | ||
229 | }; | ||
230 | |||
231 | static u8 flip_1_lgdt3303_init_data[] = { | ||
232 | 0x4c, 0x14, | ||
233 | 0x87, 0xf3 | ||
234 | }; | ||
235 | |||
236 | static u8 flip_2_lgdt3303_init_data[] = { | ||
237 | 0x4c, 0x14, | ||
238 | 0x87, 0xda | ||
239 | }; | ||
240 | |||
241 | struct lgdt330x_state* state = fe->demodulator_priv; | ||
242 | char *chip_name; | ||
243 | int err; | ||
244 | |||
245 | switch (state->config->demod_chip) { | ||
246 | case LGDT3302: | ||
247 | chip_name = "LGDT3302"; | ||
248 | err = i2c_write_demod_bytes(state, lgdt3302_init_data, | ||
249 | sizeof(lgdt3302_init_data)); | ||
250 | break; | ||
251 | case LGDT3303: | ||
252 | chip_name = "LGDT3303"; | ||
253 | switch (state->config->clock_polarity_flip) { | ||
254 | case 2: | ||
255 | err = i2c_write_demod_bytes(state, | ||
256 | flip_2_lgdt3303_init_data, | ||
257 | sizeof(flip_2_lgdt3303_init_data)); | ||
258 | break; | ||
259 | case 1: | ||
260 | err = i2c_write_demod_bytes(state, | ||
261 | flip_1_lgdt3303_init_data, | ||
262 | sizeof(flip_1_lgdt3303_init_data)); | ||
263 | break; | ||
264 | case 0: | ||
265 | default: | ||
266 | err = i2c_write_demod_bytes(state, lgdt3303_init_data, | ||
267 | sizeof(lgdt3303_init_data)); | ||
268 | } | ||
269 | break; | ||
270 | default: | ||
271 | chip_name = "undefined"; | ||
272 | printk (KERN_WARNING "Only LGDT3302 and LGDT3303 are supported chips.\n"); | ||
273 | err = -ENODEV; | ||
274 | } | ||
275 | dprintk("%s entered as %s\n", __func__, chip_name); | ||
276 | if (err < 0) | ||
277 | return err; | ||
278 | return lgdt330x_SwReset(state); | ||
279 | } | ||
280 | |||
281 | static int lgdt330x_read_ber(struct dvb_frontend* fe, u32* ber) | ||
282 | { | ||
283 | *ber = 0; /* Not supplied by the demod chips */ | ||
284 | return 0; | ||
285 | } | ||
286 | |||
287 | static int lgdt330x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) | ||
288 | { | ||
289 | struct lgdt330x_state* state = fe->demodulator_priv; | ||
290 | int err; | ||
291 | u8 buf[2]; | ||
292 | |||
293 | *ucblocks = 0; | ||
294 | |||
295 | switch (state->config->demod_chip) { | ||
296 | case LGDT3302: | ||
297 | err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1, | ||
298 | buf, sizeof(buf)); | ||
299 | break; | ||
300 | case LGDT3303: | ||
301 | err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1, | ||
302 | buf, sizeof(buf)); | ||
303 | break; | ||
304 | default: | ||
305 | printk(KERN_WARNING | ||
306 | "Only LGDT3302 and LGDT3303 are supported chips.\n"); | ||
307 | err = -ENODEV; | ||
308 | } | ||
309 | if (err < 0) | ||
310 | return err; | ||
311 | |||
312 | *ucblocks = (buf[0] << 8) | buf[1]; | ||
313 | return 0; | ||
314 | } | ||
315 | |||
316 | static int lgdt330x_set_parameters(struct dvb_frontend *fe) | ||
317 | { | ||
318 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; | ||
319 | /* | ||
320 | * Array of byte pairs <address, value> | ||
321 | * to initialize 8VSB for lgdt3303 chip 50 MHz IF | ||
322 | */ | ||
323 | static u8 lgdt3303_8vsb_44_data[] = { | ||
324 | 0x04, 0x00, | ||
325 | 0x0d, 0x40, | ||
326 | 0x0e, 0x87, | ||
327 | 0x0f, 0x8e, | ||
328 | 0x10, 0x01, | ||
329 | 0x47, 0x8b }; | ||
330 | |||
331 | /* | ||
332 | * Array of byte pairs <address, value> | ||
333 | * to initialize QAM for lgdt3303 chip | ||
334 | */ | ||
335 | static u8 lgdt3303_qam_data[] = { | ||
336 | 0x04, 0x00, | ||
337 | 0x0d, 0x00, | ||
338 | 0x0e, 0x00, | ||
339 | 0x0f, 0x00, | ||
340 | 0x10, 0x00, | ||
341 | 0x51, 0x63, | ||
342 | 0x47, 0x66, | ||
343 | 0x48, 0x66, | ||
344 | 0x4d, 0x1a, | ||
345 | 0x49, 0x08, | ||
346 | 0x4a, 0x9b }; | ||
347 | |||
348 | struct lgdt330x_state* state = fe->demodulator_priv; | ||
349 | |||
350 | static u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 }; | ||
351 | |||
352 | int err = 0; | ||
353 | /* Change only if we are actually changing the modulation */ | ||
354 | if (state->current_modulation != p->modulation) { | ||
355 | switch (p->modulation) { | ||
356 | case VSB_8: | ||
357 | dprintk("%s: VSB_8 MODE\n", __func__); | ||
358 | |||
359 | /* Select VSB mode */ | ||
360 | top_ctrl_cfg[1] = 0x03; | ||
361 | |||
362 | /* Select ANT connector if supported by card */ | ||
363 | if (state->config->pll_rf_set) | ||
364 | state->config->pll_rf_set(fe, 1); | ||
365 | |||
366 | if (state->config->demod_chip == LGDT3303) { | ||
367 | err = i2c_write_demod_bytes(state, lgdt3303_8vsb_44_data, | ||
368 | sizeof(lgdt3303_8vsb_44_data)); | ||
369 | } | ||
370 | break; | ||
371 | |||
372 | case QAM_64: | ||
373 | dprintk("%s: QAM_64 MODE\n", __func__); | ||
374 | |||
375 | /* Select QAM_64 mode */ | ||
376 | top_ctrl_cfg[1] = 0x00; | ||
377 | |||
378 | /* Select CABLE connector if supported by card */ | ||
379 | if (state->config->pll_rf_set) | ||
380 | state->config->pll_rf_set(fe, 0); | ||
381 | |||
382 | if (state->config->demod_chip == LGDT3303) { | ||
383 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, | ||
384 | sizeof(lgdt3303_qam_data)); | ||
385 | } | ||
386 | break; | ||
387 | |||
388 | case QAM_256: | ||
389 | dprintk("%s: QAM_256 MODE\n", __func__); | ||
390 | |||
391 | /* Select QAM_256 mode */ | ||
392 | top_ctrl_cfg[1] = 0x01; | ||
393 | |||
394 | /* Select CABLE connector if supported by card */ | ||
395 | if (state->config->pll_rf_set) | ||
396 | state->config->pll_rf_set(fe, 0); | ||
397 | |||
398 | if (state->config->demod_chip == LGDT3303) { | ||
399 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, | ||
400 | sizeof(lgdt3303_qam_data)); | ||
401 | } | ||
402 | break; | ||
403 | default: | ||
404 | printk(KERN_WARNING "lgdt330x: %s: Modulation type(%d) UNSUPPORTED\n", __func__, p->modulation); | ||
405 | return -1; | ||
406 | } | ||
407 | if (err < 0) | ||
408 | printk(KERN_WARNING "lgdt330x: %s: error blasting " | ||
409 | "bytes to lgdt3303 for modulation type(%d)\n", | ||
410 | __func__, p->modulation); | ||
411 | |||
412 | /* | ||
413 | * select serial or parallel MPEG harware interface | ||
414 | * Serial: 0x04 for LGDT3302 or 0x40 for LGDT3303 | ||
415 | * Parallel: 0x00 | ||
416 | */ | ||
417 | top_ctrl_cfg[1] |= state->config->serial_mpeg; | ||
418 | |||
419 | /* Select the requested mode */ | ||
420 | i2c_write_demod_bytes(state, top_ctrl_cfg, | ||
421 | sizeof(top_ctrl_cfg)); | ||
422 | if (state->config->set_ts_params) | ||
423 | state->config->set_ts_params(fe, 0); | ||
424 | state->current_modulation = p->modulation; | ||
425 | } | ||
426 | |||
427 | /* Tune to the specified frequency */ | ||
428 | if (fe->ops.tuner_ops.set_params) { | ||
429 | fe->ops.tuner_ops.set_params(fe); | ||
430 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); | ||
431 | } | ||
432 | |||
433 | /* Keep track of the new frequency */ | ||
434 | /* FIXME this is the wrong way to do this... */ | ||
435 | /* The tuner is shared with the video4linux analog API */ | ||
436 | state->current_frequency = p->frequency; | ||
437 | |||
438 | lgdt330x_SwReset(state); | ||
439 | return 0; | ||
440 | } | ||
441 | |||
442 | static int lgdt330x_get_frontend(struct dvb_frontend *fe) | ||
443 | { | ||
444 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; | ||
445 | struct lgdt330x_state *state = fe->demodulator_priv; | ||
446 | p->frequency = state->current_frequency; | ||
447 | return 0; | ||
448 | } | ||
449 | |||
450 | static int lgdt3302_read_status(struct dvb_frontend* fe, fe_status_t* status) | ||
451 | { | ||
452 | struct lgdt330x_state* state = fe->demodulator_priv; | ||
453 | u8 buf[3]; | ||
454 | |||
455 | *status = 0; /* Reset status result */ | ||
456 | |||
457 | /* AGC status register */ | ||
458 | i2c_read_demod_bytes(state, AGC_STATUS, buf, 1); | ||
459 | dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]); | ||
460 | if ((buf[0] & 0x0c) == 0x8){ | ||
461 | /* Test signal does not exist flag */ | ||
462 | /* as well as the AGC lock flag. */ | ||
463 | *status |= FE_HAS_SIGNAL; | ||
464 | } | ||
465 | |||
466 | /* | ||
467 | * You must set the Mask bits to 1 in the IRQ_MASK in order | ||
468 | * to see that status bit in the IRQ_STATUS register. | ||
469 | * This is done in SwReset(); | ||
470 | */ | ||
471 | /* signal status */ | ||
472 | i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf)); | ||
473 | dprintk("%s: TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", __func__, buf[0], buf[1], buf[2]); | ||
474 | |||
475 | |||
476 | /* sync status */ | ||
477 | if ((buf[2] & 0x03) == 0x01) { | ||
478 | *status |= FE_HAS_SYNC; | ||
479 | } | ||
480 | |||
481 | /* FEC error status */ | ||
482 | if ((buf[2] & 0x0c) == 0x08) { | ||
483 | *status |= FE_HAS_LOCK; | ||
484 | *status |= FE_HAS_VITERBI; | ||
485 | } | ||
486 | |||
487 | /* Carrier Recovery Lock Status Register */ | ||
488 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); | ||
489 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]); | ||
490 | switch (state->current_modulation) { | ||
491 | case QAM_256: | ||
492 | case QAM_64: | ||
493 | /* Need to understand why there are 3 lock levels here */ | ||
494 | if ((buf[0] & 0x07) == 0x07) | ||
495 | *status |= FE_HAS_CARRIER; | ||
496 | break; | ||
497 | case VSB_8: | ||
498 | if ((buf[0] & 0x80) == 0x80) | ||
499 | *status |= FE_HAS_CARRIER; | ||
500 | break; | ||
501 | default: | ||
502 | printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__); | ||
503 | } | ||
504 | |||
505 | return 0; | ||
506 | } | ||
507 | |||
508 | static int lgdt3303_read_status(struct dvb_frontend* fe, fe_status_t* status) | ||
509 | { | ||
510 | struct lgdt330x_state* state = fe->demodulator_priv; | ||
511 | int err; | ||
512 | u8 buf[3]; | ||
513 | |||
514 | *status = 0; /* Reset status result */ | ||
515 | |||
516 | /* lgdt3303 AGC status register */ | ||
517 | err = i2c_read_demod_bytes(state, 0x58, buf, 1); | ||
518 | if (err < 0) | ||
519 | return err; | ||
520 | |||
521 | dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]); | ||
522 | if ((buf[0] & 0x21) == 0x01){ | ||
523 | /* Test input signal does not exist flag */ | ||
524 | /* as well as the AGC lock flag. */ | ||
525 | *status |= FE_HAS_SIGNAL; | ||
526 | } | ||
527 | |||
528 | /* Carrier Recovery Lock Status Register */ | ||
529 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); | ||
530 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]); | ||
531 | switch (state->current_modulation) { | ||
532 | case QAM_256: | ||
533 | case QAM_64: | ||
534 | /* Need to understand why there are 3 lock levels here */ | ||
535 | if ((buf[0] & 0x07) == 0x07) | ||
536 | *status |= FE_HAS_CARRIER; | ||
537 | else | ||
538 | break; | ||
539 | i2c_read_demod_bytes(state, 0x8a, buf, 1); | ||
540 | if ((buf[0] & 0x04) == 0x04) | ||
541 | *status |= FE_HAS_SYNC; | ||
542 | if ((buf[0] & 0x01) == 0x01) | ||
543 | *status |= FE_HAS_LOCK; | ||
544 | if ((buf[0] & 0x08) == 0x08) | ||
545 | *status |= FE_HAS_VITERBI; | ||
546 | break; | ||
547 | case VSB_8: | ||
548 | if ((buf[0] & 0x80) == 0x80) | ||
549 | *status |= FE_HAS_CARRIER; | ||
550 | else | ||
551 | break; | ||
552 | i2c_read_demod_bytes(state, 0x38, buf, 1); | ||
553 | if ((buf[0] & 0x02) == 0x00) | ||
554 | *status |= FE_HAS_SYNC; | ||
555 | if ((buf[0] & 0x01) == 0x01) { | ||
556 | *status |= FE_HAS_LOCK; | ||
557 | *status |= FE_HAS_VITERBI; | ||
558 | } | ||
559 | break; | ||
560 | default: | ||
561 | printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__); | ||
562 | } | ||
563 | return 0; | ||
564 | } | ||
565 | |||
566 | /* Calculate SNR estimation (scaled by 2^24) | ||
567 | |||
568 | 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM | ||
569 | equations from LGDT3303 datasheet. VSB is the same between the '02 | ||
570 | and '03, so maybe QAM is too? Perhaps someone with a newer datasheet | ||
571 | that has QAM information could verify? | ||
572 | |||
573 | For 8-VSB: (two ways, take your pick) | ||
574 | LGDT3302: | ||
575 | SNR_EQ = 10 * log10(25 * 24^2 / EQ_MSE) | ||
576 | LGDT3303: | ||
577 | SNR_EQ = 10 * log10(25 * 32^2 / EQ_MSE) | ||
578 | LGDT3302 & LGDT3303: | ||
579 | SNR_PT = 10 * log10(25 * 32^2 / PT_MSE) (we use this one) | ||
580 | For 64-QAM: | ||
581 | SNR = 10 * log10( 688128 / MSEQAM) | ||
582 | For 256-QAM: | ||
583 | SNR = 10 * log10( 696320 / MSEQAM) | ||
584 | |||
585 | We re-write the snr equation as: | ||
586 | SNR * 2^24 = 10*(c - intlog10(MSE)) | ||
587 | Where for 256-QAM, c = log10(696320) * 2^24, and so on. */ | ||
588 | |||
589 | static u32 calculate_snr(u32 mse, u32 c) | ||
590 | { | ||
591 | if (mse == 0) /* No signal */ | ||
592 | return 0; | ||
593 | |||
594 | mse = intlog10(mse); | ||
595 | if (mse > c) { | ||
596 | /* Negative SNR, which is possible, but realisticly the | ||
597 | demod will lose lock before the signal gets this bad. The | ||
598 | API only allows for unsigned values, so just return 0 */ | ||
599 | return 0; | ||
600 | } | ||
601 | return 10*(c - mse); | ||
602 | } | ||
603 | |||
604 | static int lgdt3302_read_snr(struct dvb_frontend* fe, u16* snr) | ||
605 | { | ||
606 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; | ||
607 | u8 buf[5]; /* read data buffer */ | ||
608 | u32 noise; /* noise value */ | ||
609 | u32 c; /* per-modulation SNR calculation constant */ | ||
610 | |||
611 | switch(state->current_modulation) { | ||
612 | case VSB_8: | ||
613 | i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5); | ||
614 | #ifdef USE_EQMSE | ||
615 | /* Use Equalizer Mean-Square Error Register */ | ||
616 | /* SNR for ranges from -15.61 to +41.58 */ | ||
617 | noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2]; | ||
618 | c = 69765745; /* log10(25*24^2)*2^24 */ | ||
619 | #else | ||
620 | /* Use Phase Tracker Mean-Square Error Register */ | ||
621 | /* SNR for ranges from -13.11 to +44.08 */ | ||
622 | noise = ((buf[0] & 7<<3) << 13) | (buf[3] << 8) | buf[4]; | ||
623 | c = 73957994; /* log10(25*32^2)*2^24 */ | ||
624 | #endif | ||
625 | break; | ||
626 | case QAM_64: | ||
627 | case QAM_256: | ||
628 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); | ||
629 | noise = ((buf[0] & 3) << 8) | buf[1]; | ||
630 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; | ||
631 | /* log10(688128)*2^24 and log10(696320)*2^24 */ | ||
632 | break; | ||
633 | default: | ||
634 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", | ||
635 | __func__); | ||
636 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ | ||
637 | } | ||
638 | |||
639 | state->snr = calculate_snr(noise, c); | ||
640 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ | ||
641 | |||
642 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, | ||
643 | state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); | ||
644 | |||
645 | return 0; | ||
646 | } | ||
647 | |||
648 | static int lgdt3303_read_snr(struct dvb_frontend* fe, u16* snr) | ||
649 | { | ||
650 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; | ||
651 | u8 buf[5]; /* read data buffer */ | ||
652 | u32 noise; /* noise value */ | ||
653 | u32 c; /* per-modulation SNR calculation constant */ | ||
654 | |||
655 | switch(state->current_modulation) { | ||
656 | case VSB_8: | ||
657 | i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5); | ||
658 | #ifdef USE_EQMSE | ||
659 | /* Use Equalizer Mean-Square Error Register */ | ||
660 | /* SNR for ranges from -16.12 to +44.08 */ | ||
661 | noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2]; | ||
662 | c = 73957994; /* log10(25*32^2)*2^24 */ | ||
663 | #else | ||
664 | /* Use Phase Tracker Mean-Square Error Register */ | ||
665 | /* SNR for ranges from -13.11 to +44.08 */ | ||
666 | noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4]; | ||
667 | c = 73957994; /* log10(25*32^2)*2^24 */ | ||
668 | #endif | ||
669 | break; | ||
670 | case QAM_64: | ||
671 | case QAM_256: | ||
672 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); | ||
673 | noise = (buf[0] << 8) | buf[1]; | ||
674 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; | ||
675 | /* log10(688128)*2^24 and log10(696320)*2^24 */ | ||
676 | break; | ||
677 | default: | ||
678 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", | ||
679 | __func__); | ||
680 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ | ||
681 | } | ||
682 | |||
683 | state->snr = calculate_snr(noise, c); | ||
684 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ | ||
685 | |||
686 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, | ||
687 | state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); | ||
688 | |||
689 | return 0; | ||
690 | } | ||
691 | |||
692 | static int lgdt330x_read_signal_strength(struct dvb_frontend* fe, u16* strength) | ||
693 | { | ||
694 | /* Calculate Strength from SNR up to 35dB */ | ||
695 | /* Even though the SNR can go higher than 35dB, there is some comfort */ | ||
696 | /* factor in having a range of strong signals that can show at 100% */ | ||
697 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; | ||
698 | u16 snr; | ||
699 | int ret; | ||
700 | |||
701 | ret = fe->ops.read_snr(fe, &snr); | ||
702 | if (ret != 0) | ||
703 | return ret; | ||
704 | /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ | ||
705 | /* scale the range 0 - 35*2^24 into 0 - 65535 */ | ||
706 | if (state->snr >= 8960 * 0x10000) | ||
707 | *strength = 0xffff; | ||
708 | else | ||
709 | *strength = state->snr / 8960; | ||
710 | |||
711 | return 0; | ||
712 | } | ||
713 | |||
714 | static int lgdt330x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) | ||
715 | { | ||
716 | /* I have no idea about this - it may not be needed */ | ||
717 | fe_tune_settings->min_delay_ms = 500; | ||
718 | fe_tune_settings->step_size = 0; | ||
719 | fe_tune_settings->max_drift = 0; | ||
720 | return 0; | ||
721 | } | ||
722 | |||
723 | static void lgdt330x_release(struct dvb_frontend* fe) | ||
724 | { | ||
725 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; | ||
726 | kfree(state); | ||
727 | } | ||
728 | |||
729 | static struct dvb_frontend_ops lgdt3302_ops; | ||
730 | static struct dvb_frontend_ops lgdt3303_ops; | ||
731 | |||
732 | struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config, | ||
733 | struct i2c_adapter* i2c) | ||
734 | { | ||
735 | struct lgdt330x_state* state = NULL; | ||
736 | u8 buf[1]; | ||
737 | |||
738 | /* Allocate memory for the internal state */ | ||
739 | state = kzalloc(sizeof(struct lgdt330x_state), GFP_KERNEL); | ||
740 | if (state == NULL) | ||
741 | goto error; | ||
742 | |||
743 | /* Setup the state */ | ||
744 | state->config = config; | ||
745 | state->i2c = i2c; | ||
746 | |||
747 | /* Create dvb_frontend */ | ||
748 | switch (config->demod_chip) { | ||
749 | case LGDT3302: | ||
750 | memcpy(&state->frontend.ops, &lgdt3302_ops, sizeof(struct dvb_frontend_ops)); | ||
751 | break; | ||
752 | case LGDT3303: | ||
753 | memcpy(&state->frontend.ops, &lgdt3303_ops, sizeof(struct dvb_frontend_ops)); | ||
754 | break; | ||
755 | default: | ||
756 | goto error; | ||
757 | } | ||
758 | state->frontend.demodulator_priv = state; | ||
759 | |||
760 | /* Verify communication with demod chip */ | ||
761 | if (i2c_read_demod_bytes(state, 2, buf, 1)) | ||
762 | goto error; | ||
763 | |||
764 | state->current_frequency = -1; | ||
765 | state->current_modulation = -1; | ||
766 | |||
767 | return &state->frontend; | ||
768 | |||
769 | error: | ||
770 | kfree(state); | ||
771 | dprintk("%s: ERROR\n",__func__); | ||
772 | return NULL; | ||
773 | } | ||
774 | |||
775 | static struct dvb_frontend_ops lgdt3302_ops = { | ||
776 | .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, | ||
777 | .info = { | ||
778 | .name= "LG Electronics LGDT3302 VSB/QAM Frontend", | ||
779 | .frequency_min= 54000000, | ||
780 | .frequency_max= 858000000, | ||
781 | .frequency_stepsize= 62500, | ||
782 | .symbol_rate_min = 5056941, /* QAM 64 */ | ||
783 | .symbol_rate_max = 10762000, /* VSB 8 */ | ||
784 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB | ||
785 | }, | ||
786 | .init = lgdt330x_init, | ||
787 | .set_frontend = lgdt330x_set_parameters, | ||
788 | .get_frontend = lgdt330x_get_frontend, | ||
789 | .get_tune_settings = lgdt330x_get_tune_settings, | ||
790 | .read_status = lgdt3302_read_status, | ||
791 | .read_ber = lgdt330x_read_ber, | ||
792 | .read_signal_strength = lgdt330x_read_signal_strength, | ||
793 | .read_snr = lgdt3302_read_snr, | ||
794 | .read_ucblocks = lgdt330x_read_ucblocks, | ||
795 | .release = lgdt330x_release, | ||
796 | }; | ||
797 | |||
798 | static struct dvb_frontend_ops lgdt3303_ops = { | ||
799 | .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, | ||
800 | .info = { | ||
801 | .name= "LG Electronics LGDT3303 VSB/QAM Frontend", | ||
802 | .frequency_min= 54000000, | ||
803 | .frequency_max= 858000000, | ||
804 | .frequency_stepsize= 62500, | ||
805 | .symbol_rate_min = 5056941, /* QAM 64 */ | ||
806 | .symbol_rate_max = 10762000, /* VSB 8 */ | ||
807 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB | ||
808 | }, | ||
809 | .init = lgdt330x_init, | ||
810 | .set_frontend = lgdt330x_set_parameters, | ||
811 | .get_frontend = lgdt330x_get_frontend, | ||
812 | .get_tune_settings = lgdt330x_get_tune_settings, | ||
813 | .read_status = lgdt3303_read_status, | ||
814 | .read_ber = lgdt330x_read_ber, | ||
815 | .read_signal_strength = lgdt330x_read_signal_strength, | ||
816 | .read_snr = lgdt3303_read_snr, | ||
817 | .read_ucblocks = lgdt330x_read_ucblocks, | ||
818 | .release = lgdt330x_release, | ||
819 | }; | ||
820 | |||
821 | MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver"); | ||
822 | MODULE_AUTHOR("Wilson Michaels"); | ||
823 | MODULE_LICENSE("GPL"); | ||
824 | |||
825 | EXPORT_SYMBOL(lgdt330x_attach); | ||
826 | |||
827 | /* | ||
828 | * Local variables: | ||
829 | * c-basic-offset: 8 | ||
830 | * End: | ||
831 | */ | ||