Commit | Line | Data |
---|---|---|
d8667cbb | 1 | /* |
1963c907 | 2 | * Support for LGDT3302 and LGDT3303 - VSB/QAM |
d8667cbb MM |
3 | * |
4 | * Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net> | |
5 | * | |
d8667cbb MM |
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 | * | |
1963c907 MK |
25 | * This Linux driver supports: |
26 | * DViCO FusionHDTV 3 Gold-Q | |
27 | * DViCO FusionHDTV 3 Gold-T | |
28 | * DViCO FusionHDTV 5 Gold | |
3cff00d9 | 29 | * DViCO FusionHDTV 5 Lite |
d8e6acf2 | 30 | * DViCO FusionHDTV 5 USB Gold |
c0b11b91 | 31 | * Air2PC/AirStar 2 ATSC 3rd generation (HD5000) |
20fe4f65 | 32 | * pcHDTV HD5500 |
d8667cbb | 33 | * |
d8667cbb MM |
34 | */ |
35 | ||
d8667cbb MM |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
d8667cbb MM |
38 | #include <linux/init.h> |
39 | #include <linux/delay.h> | |
4e57b681 TS |
40 | #include <linux/string.h> |
41 | #include <linux/slab.h> | |
d8667cbb MM |
42 | #include <asm/byteorder.h> |
43 | ||
44 | #include "dvb_frontend.h" | |
19be685a | 45 | #include "dvb_math.h" |
6ddcc919 MK |
46 | #include "lgdt330x_priv.h" |
47 | #include "lgdt330x.h" | |
d8667cbb | 48 | |
19be685a TP |
49 | /* Use Equalizer Mean Squared Error instead of Phaser Tracker MSE */ |
50 | /* #define USE_EQMSE */ | |
51 | ||
ff699e6b | 52 | static int debug; |
d8667cbb | 53 | module_param(debug, int, 0644); |
6ddcc919 | 54 | MODULE_PARM_DESC(debug,"Turn on/off lgdt330x frontend debugging (default:off)."); |
d8667cbb MM |
55 | #define dprintk(args...) \ |
56 | do { \ | |
6ddcc919 | 57 | if (debug) printk(KERN_DEBUG "lgdt330x: " args); \ |
d8667cbb MM |
58 | } while (0) |
59 | ||
6ddcc919 | 60 | struct lgdt330x_state |
d8667cbb MM |
61 | { |
62 | struct i2c_adapter* i2c; | |
d8667cbb MM |
63 | |
64 | /* Configuration settings */ | |
6ddcc919 | 65 | const struct lgdt330x_config* config; |
d8667cbb MM |
66 | |
67 | struct dvb_frontend frontend; | |
68 | ||
69 | /* Demodulator private data */ | |
70 | fe_modulation_t current_modulation; | |
19be685a | 71 | u32 snr; /* Result of last SNR calculation */ |
d8667cbb MM |
72 | |
73 | /* Tuner private data */ | |
74 | u32 current_frequency; | |
75 | }; | |
76 | ||
1963c907 | 77 | static int i2c_write_demod_bytes (struct lgdt330x_state* state, |
dc9ca2af MK |
78 | u8 *buf, /* data bytes to send */ |
79 | int len /* number of bytes to send */ ) | |
d8667cbb | 80 | { |
b6aef071 | 81 | struct i2c_msg msg = |
1963c907 MK |
82 | { .addr = state->config->demod_address, |
83 | .flags = 0, | |
84 | .buf = buf, | |
85 | .len = 2 }; | |
b6aef071 | 86 | int i; |
1963c907 | 87 | int err; |
d8667cbb | 88 | |
1963c907 | 89 | for (i=0; i<len-1; i+=2){ |
d8667cbb | 90 | if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { |
271ddbf7 | 91 | printk(KERN_WARNING "lgdt330x: %s error (addr %02x <- %02x, err = %i)\n", __func__, msg.buf[0], msg.buf[1], err); |
58ba006b MK |
92 | if (err < 0) |
93 | return err; | |
94 | else | |
95 | return -EREMOTEIO; | |
d8667cbb | 96 | } |
1963c907 | 97 | msg.buf += 2; |
d8667cbb MM |
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 | ||
1963c907 | 107 | static u8 i2c_read_demod_bytes (struct lgdt330x_state* state, |
d8667cbb MM |
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) { | |
271ddbf7 | 120 | printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __func__, state->config->demod_address, reg, ret); |
d8667cbb MM |
121 | } else { |
122 | ret = 0; | |
123 | } | |
124 | return ret; | |
125 | } | |
126 | ||
127 | /* Software reset */ | |
1963c907 | 128 | static int lgdt3302_SwReset(struct lgdt330x_state* state) |
d8667cbb MM |
129 | { |
130 | u8 ret; | |
131 | u8 reset[] = { | |
132 | IRQ_MASK, | |
133 | 0x00 /* bit 6 is active low software reset | |
134 | * bits 5-0 are 1 to mask interrupts */ | |
135 | }; | |
136 | ||
1963c907 | 137 | ret = i2c_write_demod_bytes(state, |
dc9ca2af | 138 | reset, sizeof(reset)); |
d8667cbb | 139 | if (ret == 0) { |
1963c907 MK |
140 | |
141 | /* force reset high (inactive) and unmask interrupts */ | |
142 | reset[1] = 0x7f; | |
143 | ret = i2c_write_demod_bytes(state, | |
dc9ca2af | 144 | reset, sizeof(reset)); |
d8667cbb | 145 | } |
d8667cbb MM |
146 | return ret; |
147 | } | |
148 | ||
1963c907 MK |
149 | static int lgdt3303_SwReset(struct lgdt330x_state* state) |
150 | { | |
151 | u8 ret; | |
152 | u8 reset[] = { | |
153 | 0x02, | |
154 | 0x00 /* bit 0 is active low software reset */ | |
155 | }; | |
156 | ||
157 | ret = i2c_write_demod_bytes(state, | |
dc9ca2af | 158 | reset, sizeof(reset)); |
1963c907 MK |
159 | if (ret == 0) { |
160 | ||
161 | /* force reset high (inactive) */ | |
162 | reset[1] = 0x01; | |
163 | ret = i2c_write_demod_bytes(state, | |
dc9ca2af | 164 | reset, sizeof(reset)); |
1963c907 MK |
165 | } |
166 | return ret; | |
167 | } | |
168 | ||
169 | static int lgdt330x_SwReset(struct lgdt330x_state* state) | |
170 | { | |
171 | switch (state->config->demod_chip) { | |
172 | case LGDT3302: | |
173 | return lgdt3302_SwReset(state); | |
174 | case LGDT3303: | |
175 | return lgdt3303_SwReset(state); | |
176 | default: | |
177 | return -ENODEV; | |
178 | } | |
179 | } | |
180 | ||
6ddcc919 | 181 | static int lgdt330x_init(struct dvb_frontend* fe) |
d8667cbb MM |
182 | { |
183 | /* Hardware reset is done using gpio[0] of cx23880x chip. | |
184 | * I'd like to do it here, but don't know how to find chip address. | |
185 | * cx88-cards.c arranges for the reset bit to be inactive (high). | |
186 | * Maybe there needs to be a callable function in cx88-core or | |
187 | * the caller of this function needs to do it. */ | |
188 | ||
1963c907 MK |
189 | /* |
190 | * Array of byte pairs <address, value> | |
191 | * to initialize each different chip | |
192 | */ | |
193 | static u8 lgdt3302_init_data[] = { | |
194 | /* Use 50MHz parameter values from spec sheet since xtal is 50 */ | |
195 | /* Change the value of NCOCTFV[25:0] of carrier | |
196 | recovery center frequency register */ | |
197 | VSB_CARRIER_FREQ0, 0x00, | |
198 | VSB_CARRIER_FREQ1, 0x87, | |
199 | VSB_CARRIER_FREQ2, 0x8e, | |
200 | VSB_CARRIER_FREQ3, 0x01, | |
201 | /* Change the TPCLK pin polarity | |
202 | data is valid on falling clock */ | |
203 | DEMUX_CONTROL, 0xfb, | |
204 | /* Change the value of IFBW[11:0] of | |
205 | AGC IF/RF loop filter bandwidth register */ | |
206 | AGC_RF_BANDWIDTH0, 0x40, | |
207 | AGC_RF_BANDWIDTH1, 0x93, | |
208 | AGC_RF_BANDWIDTH2, 0x00, | |
209 | /* Change the value of bit 6, 'nINAGCBY' and | |
210 | 'NSSEL[1:0] of ACG function control register 2 */ | |
211 | AGC_FUNC_CTRL2, 0xc6, | |
212 | /* Change the value of bit 6 'RFFIX' | |
213 | of AGC function control register 3 */ | |
214 | AGC_FUNC_CTRL3, 0x40, | |
215 | /* Set the value of 'INLVTHD' register 0x2a/0x2c | |
216 | to 0x7fe */ | |
217 | AGC_DELAY0, 0x07, | |
218 | AGC_DELAY2, 0xfe, | |
219 | /* Change the value of IAGCBW[15:8] | |
9aaeded7 | 220 | of inner AGC loop filter bandwidth */ |
1963c907 MK |
221 | AGC_LOOP_BANDWIDTH0, 0x08, |
222 | AGC_LOOP_BANDWIDTH1, 0x9a | |
223 | }; | |
224 | ||
225 | static u8 lgdt3303_init_data[] = { | |
226 | 0x4c, 0x14 | |
227 | }; | |
228 | ||
c0f4c0ad | 229 | static u8 flip_1_lgdt3303_init_data[] = { |
c0b11b91 MK |
230 | 0x4c, 0x14, |
231 | 0x87, 0xf3 | |
232 | }; | |
233 | ||
c0f4c0ad MK |
234 | static u8 flip_2_lgdt3303_init_data[] = { |
235 | 0x4c, 0x14, | |
236 | 0x87, 0xda | |
237 | }; | |
238 | ||
1963c907 MK |
239 | struct lgdt330x_state* state = fe->demodulator_priv; |
240 | char *chip_name; | |
241 | int err; | |
242 | ||
243 | switch (state->config->demod_chip) { | |
244 | case LGDT3302: | |
245 | chip_name = "LGDT3302"; | |
246 | err = i2c_write_demod_bytes(state, lgdt3302_init_data, | |
dc9ca2af MK |
247 | sizeof(lgdt3302_init_data)); |
248 | break; | |
1963c907 MK |
249 | case LGDT3303: |
250 | chip_name = "LGDT3303"; | |
c0f4c0ad MK |
251 | switch (state->config->clock_polarity_flip) { |
252 | case 2: | |
253 | err = i2c_write_demod_bytes(state, | |
254 | flip_2_lgdt3303_init_data, | |
255 | sizeof(flip_2_lgdt3303_init_data)); | |
256 | break; | |
257 | case 1: | |
258 | err = i2c_write_demod_bytes(state, | |
259 | flip_1_lgdt3303_init_data, | |
260 | sizeof(flip_1_lgdt3303_init_data)); | |
261 | break; | |
262 | case 0: | |
263 | default: | |
c0b11b91 MK |
264 | err = i2c_write_demod_bytes(state, lgdt3303_init_data, |
265 | sizeof(lgdt3303_init_data)); | |
266 | } | |
dc9ca2af | 267 | break; |
1963c907 MK |
268 | default: |
269 | chip_name = "undefined"; | |
270 | printk (KERN_WARNING "Only LGDT3302 and LGDT3303 are supported chips.\n"); | |
271 | err = -ENODEV; | |
272 | } | |
271ddbf7 | 273 | dprintk("%s entered as %s\n", __func__, chip_name); |
1963c907 MK |
274 | if (err < 0) |
275 | return err; | |
276 | return lgdt330x_SwReset(state); | |
d8667cbb MM |
277 | } |
278 | ||
6ddcc919 | 279 | static int lgdt330x_read_ber(struct dvb_frontend* fe, u32* ber) |
d8667cbb | 280 | { |
1963c907 | 281 | *ber = 0; /* Not supplied by the demod chips */ |
d8667cbb MM |
282 | return 0; |
283 | } | |
284 | ||
6ddcc919 | 285 | static int lgdt330x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) |
d8667cbb | 286 | { |
1963c907 MK |
287 | struct lgdt330x_state* state = fe->demodulator_priv; |
288 | int err; | |
d8667cbb MM |
289 | u8 buf[2]; |
290 | ||
1963c907 MK |
291 | switch (state->config->demod_chip) { |
292 | case LGDT3302: | |
293 | err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1, | |
dc9ca2af MK |
294 | buf, sizeof(buf)); |
295 | break; | |
1963c907 MK |
296 | case LGDT3303: |
297 | err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1, | |
dc9ca2af MK |
298 | buf, sizeof(buf)); |
299 | break; | |
1963c907 MK |
300 | default: |
301 | printk(KERN_WARNING | |
dc9ca2af | 302 | "Only LGDT3302 and LGDT3303 are supported chips.\n"); |
1963c907 MK |
303 | err = -ENODEV; |
304 | } | |
d8667cbb MM |
305 | |
306 | *ucblocks = (buf[0] << 8) | buf[1]; | |
307 | return 0; | |
308 | } | |
309 | ||
6ddcc919 | 310 | static int lgdt330x_set_parameters(struct dvb_frontend* fe, |
d8667cbb MM |
311 | struct dvb_frontend_parameters *param) |
312 | { | |
1963c907 MK |
313 | /* |
314 | * Array of byte pairs <address, value> | |
315 | * to initialize 8VSB for lgdt3303 chip 50 MHz IF | |
316 | */ | |
317 | static u8 lgdt3303_8vsb_44_data[] = { | |
318 | 0x04, 0x00, | |
319 | 0x0d, 0x40, | |
0b6389ff MK |
320 | 0x0e, 0x87, |
321 | 0x0f, 0x8e, | |
322 | 0x10, 0x01, | |
323 | 0x47, 0x8b }; | |
1963c907 MK |
324 | |
325 | /* | |
326 | * Array of byte pairs <address, value> | |
327 | * to initialize QAM for lgdt3303 chip | |
328 | */ | |
329 | static u8 lgdt3303_qam_data[] = { | |
330 | 0x04, 0x00, | |
331 | 0x0d, 0x00, | |
332 | 0x0e, 0x00, | |
333 | 0x0f, 0x00, | |
334 | 0x10, 0x00, | |
335 | 0x51, 0x63, | |
336 | 0x47, 0x66, | |
337 | 0x48, 0x66, | |
338 | 0x4d, 0x1a, | |
339 | 0x49, 0x08, | |
340 | 0x4a, 0x9b }; | |
341 | ||
342 | struct lgdt330x_state* state = fe->demodulator_priv; | |
d8667cbb | 343 | |
d8667cbb | 344 | static u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 }; |
d8667cbb | 345 | |
1963c907 | 346 | int err; |
d8667cbb MM |
347 | /* Change only if we are actually changing the modulation */ |
348 | if (state->current_modulation != param->u.vsb.modulation) { | |
349 | switch(param->u.vsb.modulation) { | |
350 | case VSB_8: | |
271ddbf7 | 351 | dprintk("%s: VSB_8 MODE\n", __func__); |
d8667cbb | 352 | |
1963c907 MK |
353 | /* Select VSB mode */ |
354 | top_ctrl_cfg[1] = 0x03; | |
0ccef6db MK |
355 | |
356 | /* Select ANT connector if supported by card */ | |
357 | if (state->config->pll_rf_set) | |
358 | state->config->pll_rf_set(fe, 1); | |
1963c907 MK |
359 | |
360 | if (state->config->demod_chip == LGDT3303) { | |
361 | err = i2c_write_demod_bytes(state, lgdt3303_8vsb_44_data, | |
dc9ca2af | 362 | sizeof(lgdt3303_8vsb_44_data)); |
1963c907 | 363 | } |
d8667cbb MM |
364 | break; |
365 | ||
366 | case QAM_64: | |
271ddbf7 | 367 | dprintk("%s: QAM_64 MODE\n", __func__); |
d8667cbb | 368 | |
1963c907 MK |
369 | /* Select QAM_64 mode */ |
370 | top_ctrl_cfg[1] = 0x00; | |
0ccef6db MK |
371 | |
372 | /* Select CABLE connector if supported by card */ | |
373 | if (state->config->pll_rf_set) | |
374 | state->config->pll_rf_set(fe, 0); | |
1963c907 MK |
375 | |
376 | if (state->config->demod_chip == LGDT3303) { | |
377 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, | |
378 | sizeof(lgdt3303_qam_data)); | |
379 | } | |
d8667cbb MM |
380 | break; |
381 | ||
382 | case QAM_256: | |
271ddbf7 | 383 | dprintk("%s: QAM_256 MODE\n", __func__); |
d8667cbb | 384 | |
1963c907 MK |
385 | /* Select QAM_256 mode */ |
386 | top_ctrl_cfg[1] = 0x01; | |
0ccef6db MK |
387 | |
388 | /* Select CABLE connector if supported by card */ | |
389 | if (state->config->pll_rf_set) | |
390 | state->config->pll_rf_set(fe, 0); | |
1963c907 MK |
391 | |
392 | if (state->config->demod_chip == LGDT3303) { | |
393 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, | |
394 | sizeof(lgdt3303_qam_data)); | |
395 | } | |
d8667cbb MM |
396 | break; |
397 | default: | |
271ddbf7 | 398 | printk(KERN_WARNING "lgdt330x: %s: Modulation type(%d) UNSUPPORTED\n", __func__, param->u.vsb.modulation); |
d8667cbb MM |
399 | return -1; |
400 | } | |
1963c907 MK |
401 | /* |
402 | * select serial or parallel MPEG harware interface | |
403 | * Serial: 0x04 for LGDT3302 or 0x40 for LGDT3303 | |
404 | * Parallel: 0x00 | |
405 | */ | |
406 | top_ctrl_cfg[1] |= state->config->serial_mpeg; | |
d8667cbb MM |
407 | |
408 | /* Select the requested mode */ | |
1963c907 | 409 | i2c_write_demod_bytes(state, top_ctrl_cfg, |
dc9ca2af MK |
410 | sizeof(top_ctrl_cfg)); |
411 | if (state->config->set_ts_params) | |
412 | state->config->set_ts_params(fe, 0); | |
d8667cbb MM |
413 | state->current_modulation = param->u.vsb.modulation; |
414 | } | |
d8667cbb | 415 | |
dc9ca2af | 416 | /* Tune to the specified frequency */ |
dea74869 PB |
417 | if (fe->ops.tuner_ops.set_params) { |
418 | fe->ops.tuner_ops.set_params(fe, param); | |
419 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); | |
02269f37 | 420 | } |
dc9ca2af MK |
421 | |
422 | /* Keep track of the new frequency */ | |
4302c15e MCC |
423 | /* FIXME this is the wrong way to do this... */ |
424 | /* The tuner is shared with the video4linux analog API */ | |
dc9ca2af MK |
425 | state->current_frequency = param->frequency; |
426 | ||
6ddcc919 | 427 | lgdt330x_SwReset(state); |
d8667cbb MM |
428 | return 0; |
429 | } | |
430 | ||
6ddcc919 | 431 | static int lgdt330x_get_frontend(struct dvb_frontend* fe, |
d8667cbb MM |
432 | struct dvb_frontend_parameters* param) |
433 | { | |
6ddcc919 | 434 | struct lgdt330x_state *state = fe->demodulator_priv; |
d8667cbb MM |
435 | param->frequency = state->current_frequency; |
436 | return 0; | |
437 | } | |
438 | ||
1963c907 | 439 | static int lgdt3302_read_status(struct dvb_frontend* fe, fe_status_t* status) |
d8667cbb | 440 | { |
1963c907 | 441 | struct lgdt330x_state* state = fe->demodulator_priv; |
d8667cbb MM |
442 | u8 buf[3]; |
443 | ||
444 | *status = 0; /* Reset status result */ | |
445 | ||
08d80525 | 446 | /* AGC status register */ |
1963c907 | 447 | i2c_read_demod_bytes(state, AGC_STATUS, buf, 1); |
271ddbf7 | 448 | dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]); |
08d80525 MK |
449 | if ((buf[0] & 0x0c) == 0x8){ |
450 | /* Test signal does not exist flag */ | |
451 | /* as well as the AGC lock flag. */ | |
452 | *status |= FE_HAS_SIGNAL; | |
08d80525 MK |
453 | } |
454 | ||
1963c907 MK |
455 | /* |
456 | * You must set the Mask bits to 1 in the IRQ_MASK in order | |
457 | * to see that status bit in the IRQ_STATUS register. | |
458 | * This is done in SwReset(); | |
459 | */ | |
d8667cbb | 460 | /* signal status */ |
1963c907 | 461 | i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf)); |
271ddbf7 | 462 | dprintk("%s: TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", __func__, buf[0], buf[1], buf[2]); |
08d80525 | 463 | |
d8667cbb MM |
464 | |
465 | /* sync status */ | |
466 | if ((buf[2] & 0x03) == 0x01) { | |
467 | *status |= FE_HAS_SYNC; | |
468 | } | |
469 | ||
470 | /* FEC error status */ | |
471 | if ((buf[2] & 0x0c) == 0x08) { | |
472 | *status |= FE_HAS_LOCK; | |
473 | *status |= FE_HAS_VITERBI; | |
474 | } | |
475 | ||
d8667cbb | 476 | /* Carrier Recovery Lock Status Register */ |
1963c907 | 477 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); |
271ddbf7 | 478 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]); |
d8667cbb MM |
479 | switch (state->current_modulation) { |
480 | case QAM_256: | |
481 | case QAM_64: | |
af901ca1 | 482 | /* Need to understand why there are 3 lock levels here */ |
d8667cbb MM |
483 | if ((buf[0] & 0x07) == 0x07) |
484 | *status |= FE_HAS_CARRIER; | |
d8667cbb | 485 | break; |
d8667cbb MM |
486 | case VSB_8: |
487 | if ((buf[0] & 0x80) == 0x80) | |
488 | *status |= FE_HAS_CARRIER; | |
d8667cbb | 489 | break; |
d8667cbb | 490 | default: |
271ddbf7 | 491 | printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__); |
d8667cbb | 492 | } |
d8667cbb MM |
493 | |
494 | return 0; | |
495 | } | |
496 | ||
1963c907 MK |
497 | static int lgdt3303_read_status(struct dvb_frontend* fe, fe_status_t* status) |
498 | { | |
499 | struct lgdt330x_state* state = fe->demodulator_priv; | |
500 | int err; | |
501 | u8 buf[3]; | |
502 | ||
503 | *status = 0; /* Reset status result */ | |
504 | ||
505 | /* lgdt3303 AGC status register */ | |
506 | err = i2c_read_demod_bytes(state, 0x58, buf, 1); | |
507 | if (err < 0) | |
508 | return err; | |
509 | ||
271ddbf7 | 510 | dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]); |
1963c907 MK |
511 | if ((buf[0] & 0x21) == 0x01){ |
512 | /* Test input signal does not exist flag */ | |
513 | /* as well as the AGC lock flag. */ | |
514 | *status |= FE_HAS_SIGNAL; | |
1963c907 MK |
515 | } |
516 | ||
517 | /* Carrier Recovery Lock Status Register */ | |
518 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); | |
271ddbf7 | 519 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]); |
1963c907 MK |
520 | switch (state->current_modulation) { |
521 | case QAM_256: | |
522 | case QAM_64: | |
af901ca1 | 523 | /* Need to understand why there are 3 lock levels here */ |
1963c907 MK |
524 | if ((buf[0] & 0x07) == 0x07) |
525 | *status |= FE_HAS_CARRIER; | |
526 | else | |
527 | break; | |
528 | i2c_read_demod_bytes(state, 0x8a, buf, 1); | |
529 | if ((buf[0] & 0x04) == 0x04) | |
530 | *status |= FE_HAS_SYNC; | |
531 | if ((buf[0] & 0x01) == 0x01) | |
532 | *status |= FE_HAS_LOCK; | |
533 | if ((buf[0] & 0x08) == 0x08) | |
534 | *status |= FE_HAS_VITERBI; | |
535 | break; | |
536 | case VSB_8: | |
537 | if ((buf[0] & 0x80) == 0x80) | |
538 | *status |= FE_HAS_CARRIER; | |
539 | else | |
540 | break; | |
541 | i2c_read_demod_bytes(state, 0x38, buf, 1); | |
542 | if ((buf[0] & 0x02) == 0x00) | |
543 | *status |= FE_HAS_SYNC; | |
544 | if ((buf[0] & 0x01) == 0x01) { | |
545 | *status |= FE_HAS_LOCK; | |
546 | *status |= FE_HAS_VITERBI; | |
547 | } | |
548 | break; | |
549 | default: | |
271ddbf7 | 550 | printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__); |
1963c907 MK |
551 | } |
552 | return 0; | |
553 | } | |
554 | ||
19be685a TP |
555 | /* Calculate SNR estimation (scaled by 2^24) |
556 | ||
557 | 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM | |
558 | equations from LGDT3303 datasheet. VSB is the same between the '02 | |
559 | and '03, so maybe QAM is too? Perhaps someone with a newer datasheet | |
560 | that has QAM information could verify? | |
561 | ||
562 | For 8-VSB: (two ways, take your pick) | |
563 | LGDT3302: | |
564 | SNR_EQ = 10 * log10(25 * 24^2 / EQ_MSE) | |
565 | LGDT3303: | |
566 | SNR_EQ = 10 * log10(25 * 32^2 / EQ_MSE) | |
567 | LGDT3302 & LGDT3303: | |
568 | SNR_PT = 10 * log10(25 * 32^2 / PT_MSE) (we use this one) | |
569 | For 64-QAM: | |
570 | SNR = 10 * log10( 688128 / MSEQAM) | |
571 | For 256-QAM: | |
572 | SNR = 10 * log10( 696320 / MSEQAM) | |
573 | ||
574 | We re-write the snr equation as: | |
575 | SNR * 2^24 = 10*(c - intlog10(MSE)) | |
576 | Where for 256-QAM, c = log10(696320) * 2^24, and so on. */ | |
577 | ||
578 | static u32 calculate_snr(u32 mse, u32 c) | |
d8667cbb | 579 | { |
19be685a TP |
580 | if (mse == 0) /* No signal */ |
581 | return 0; | |
582 | ||
583 | mse = intlog10(mse); | |
584 | if (mse > c) { | |
585 | /* Negative SNR, which is possible, but realisticly the | |
586 | demod will lose lock before the signal gets this bad. The | |
587 | API only allows for unsigned values, so just return 0 */ | |
588 | return 0; | |
589 | } | |
590 | return 10*(c - mse); | |
d8667cbb MM |
591 | } |
592 | ||
1963c907 | 593 | static int lgdt3302_read_snr(struct dvb_frontend* fe, u16* snr) |
d8667cbb | 594 | { |
6ddcc919 | 595 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
19be685a TP |
596 | u8 buf[5]; /* read data buffer */ |
597 | u32 noise; /* noise value */ | |
598 | u32 c; /* per-modulation SNR calculation constant */ | |
d8667cbb | 599 | |
19be685a TP |
600 | switch(state->current_modulation) { |
601 | case VSB_8: | |
602 | i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5); | |
603 | #ifdef USE_EQMSE | |
604 | /* Use Equalizer Mean-Square Error Register */ | |
605 | /* SNR for ranges from -15.61 to +41.58 */ | |
d8667cbb | 606 | noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2]; |
19be685a | 607 | c = 69765745; /* log10(25*24^2)*2^24 */ |
d8667cbb | 608 | #else |
19be685a TP |
609 | /* Use Phase Tracker Mean-Square Error Register */ |
610 | /* SNR for ranges from -13.11 to +44.08 */ | |
d8667cbb | 611 | noise = ((buf[0] & 7<<3) << 13) | (buf[3] << 8) | buf[4]; |
19be685a TP |
612 | c = 73957994; /* log10(25*32^2)*2^24 */ |
613 | #endif | |
614 | break; | |
615 | case QAM_64: | |
616 | case QAM_256: | |
617 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); | |
1963c907 | 618 | noise = ((buf[0] & 3) << 8) | buf[1]; |
19be685a TP |
619 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; |
620 | /* log10(688128)*2^24 and log10(696320)*2^24 */ | |
621 | break; | |
622 | default: | |
623 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", | |
271ddbf7 | 624 | __func__); |
19be685a | 625 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ |
d8667cbb MM |
626 | } |
627 | ||
19be685a TP |
628 | state->snr = calculate_snr(noise, c); |
629 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ | |
d8667cbb | 630 | |
271ddbf7 | 631 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, |
19be685a | 632 | state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); |
d8667cbb MM |
633 | |
634 | return 0; | |
635 | } | |
636 | ||
1963c907 MK |
637 | static int lgdt3303_read_snr(struct dvb_frontend* fe, u16* snr) |
638 | { | |
1963c907 | 639 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
19be685a TP |
640 | u8 buf[5]; /* read data buffer */ |
641 | u32 noise; /* noise value */ | |
642 | u32 c; /* per-modulation SNR calculation constant */ | |
1963c907 | 643 | |
19be685a TP |
644 | switch(state->current_modulation) { |
645 | case VSB_8: | |
646 | i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5); | |
647 | #ifdef USE_EQMSE | |
648 | /* Use Equalizer Mean-Square Error Register */ | |
649 | /* SNR for ranges from -16.12 to +44.08 */ | |
650 | noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2]; | |
651 | c = 73957994; /* log10(25*32^2)*2^24 */ | |
652 | #else | |
653 | /* Use Phase Tracker Mean-Square Error Register */ | |
654 | /* SNR for ranges from -13.11 to +44.08 */ | |
1963c907 | 655 | noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4]; |
19be685a TP |
656 | c = 73957994; /* log10(25*32^2)*2^24 */ |
657 | #endif | |
658 | break; | |
659 | case QAM_64: | |
660 | case QAM_256: | |
661 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); | |
1963c907 | 662 | noise = (buf[0] << 8) | buf[1]; |
19be685a TP |
663 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; |
664 | /* log10(688128)*2^24 and log10(696320)*2^24 */ | |
665 | break; | |
666 | default: | |
667 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", | |
271ddbf7 | 668 | __func__); |
19be685a | 669 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ |
1963c907 MK |
670 | } |
671 | ||
19be685a TP |
672 | state->snr = calculate_snr(noise, c); |
673 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ | |
674 | ||
271ddbf7 | 675 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, |
19be685a TP |
676 | state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static int lgdt330x_read_signal_strength(struct dvb_frontend* fe, u16* strength) | |
682 | { | |
683 | /* Calculate Strength from SNR up to 35dB */ | |
684 | /* Even though the SNR can go higher than 35dB, there is some comfort */ | |
685 | /* factor in having a range of strong signals that can show at 100% */ | |
686 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; | |
687 | u16 snr; | |
688 | int ret; | |
1963c907 | 689 | |
19be685a TP |
690 | ret = fe->ops.read_snr(fe, &snr); |
691 | if (ret != 0) | |
692 | return ret; | |
693 | /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ | |
694 | /* scale the range 0 - 35*2^24 into 0 - 65535 */ | |
695 | if (state->snr >= 8960 * 0x10000) | |
696 | *strength = 0xffff; | |
697 | else | |
698 | *strength = state->snr / 8960; | |
1963c907 MK |
699 | |
700 | return 0; | |
701 | } | |
702 | ||
6ddcc919 | 703 | static int lgdt330x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) |
d8667cbb MM |
704 | { |
705 | /* I have no idea about this - it may not be needed */ | |
706 | fe_tune_settings->min_delay_ms = 500; | |
707 | fe_tune_settings->step_size = 0; | |
708 | fe_tune_settings->max_drift = 0; | |
709 | return 0; | |
710 | } | |
711 | ||
6ddcc919 | 712 | static void lgdt330x_release(struct dvb_frontend* fe) |
d8667cbb | 713 | { |
6ddcc919 | 714 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
d8667cbb MM |
715 | kfree(state); |
716 | } | |
717 | ||
1963c907 MK |
718 | static struct dvb_frontend_ops lgdt3302_ops; |
719 | static struct dvb_frontend_ops lgdt3303_ops; | |
d8667cbb | 720 | |
6ddcc919 | 721 | struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config, |
d8667cbb MM |
722 | struct i2c_adapter* i2c) |
723 | { | |
6ddcc919 | 724 | struct lgdt330x_state* state = NULL; |
d8667cbb MM |
725 | u8 buf[1]; |
726 | ||
727 | /* Allocate memory for the internal state */ | |
7408187d | 728 | state = kzalloc(sizeof(struct lgdt330x_state), GFP_KERNEL); |
d8667cbb MM |
729 | if (state == NULL) |
730 | goto error; | |
d8667cbb MM |
731 | |
732 | /* Setup the state */ | |
733 | state->config = config; | |
734 | state->i2c = i2c; | |
dea74869 PB |
735 | |
736 | /* Create dvb_frontend */ | |
1963c907 MK |
737 | switch (config->demod_chip) { |
738 | case LGDT3302: | |
dea74869 | 739 | memcpy(&state->frontend.ops, &lgdt3302_ops, sizeof(struct dvb_frontend_ops)); |
1963c907 MK |
740 | break; |
741 | case LGDT3303: | |
dea74869 | 742 | memcpy(&state->frontend.ops, &lgdt3303_ops, sizeof(struct dvb_frontend_ops)); |
1963c907 MK |
743 | break; |
744 | default: | |
745 | goto error; | |
746 | } | |
dea74869 | 747 | state->frontend.demodulator_priv = state; |
1963c907 | 748 | |
d8667cbb | 749 | /* Verify communication with demod chip */ |
1963c907 | 750 | if (i2c_read_demod_bytes(state, 2, buf, 1)) |
d8667cbb MM |
751 | goto error; |
752 | ||
753 | state->current_frequency = -1; | |
754 | state->current_modulation = -1; | |
755 | ||
d8667cbb MM |
756 | return &state->frontend; |
757 | ||
758 | error: | |
2ea75330 | 759 | kfree(state); |
271ddbf7 | 760 | dprintk("%s: ERROR\n",__func__); |
d8667cbb MM |
761 | return NULL; |
762 | } | |
763 | ||
1963c907 MK |
764 | static struct dvb_frontend_ops lgdt3302_ops = { |
765 | .info = { | |
e179d8b0 | 766 | .name= "LG Electronics LGDT3302 VSB/QAM Frontend", |
1963c907 MK |
767 | .type = FE_ATSC, |
768 | .frequency_min= 54000000, | |
769 | .frequency_max= 858000000, | |
770 | .frequency_stepsize= 62500, | |
66944e99 MK |
771 | .symbol_rate_min = 5056941, /* QAM 64 */ |
772 | .symbol_rate_max = 10762000, /* VSB 8 */ | |
1963c907 MK |
773 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB |
774 | }, | |
775 | .init = lgdt330x_init, | |
776 | .set_frontend = lgdt330x_set_parameters, | |
777 | .get_frontend = lgdt330x_get_frontend, | |
778 | .get_tune_settings = lgdt330x_get_tune_settings, | |
779 | .read_status = lgdt3302_read_status, | |
780 | .read_ber = lgdt330x_read_ber, | |
781 | .read_signal_strength = lgdt330x_read_signal_strength, | |
782 | .read_snr = lgdt3302_read_snr, | |
783 | .read_ucblocks = lgdt330x_read_ucblocks, | |
784 | .release = lgdt330x_release, | |
785 | }; | |
786 | ||
787 | static struct dvb_frontend_ops lgdt3303_ops = { | |
d8667cbb | 788 | .info = { |
1963c907 | 789 | .name= "LG Electronics LGDT3303 VSB/QAM Frontend", |
d8667cbb MM |
790 | .type = FE_ATSC, |
791 | .frequency_min= 54000000, | |
792 | .frequency_max= 858000000, | |
793 | .frequency_stepsize= 62500, | |
66944e99 MK |
794 | .symbol_rate_min = 5056941, /* QAM 64 */ |
795 | .symbol_rate_max = 10762000, /* VSB 8 */ | |
d8667cbb MM |
796 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB |
797 | }, | |
6ddcc919 MK |
798 | .init = lgdt330x_init, |
799 | .set_frontend = lgdt330x_set_parameters, | |
800 | .get_frontend = lgdt330x_get_frontend, | |
801 | .get_tune_settings = lgdt330x_get_tune_settings, | |
1963c907 | 802 | .read_status = lgdt3303_read_status, |
6ddcc919 MK |
803 | .read_ber = lgdt330x_read_ber, |
804 | .read_signal_strength = lgdt330x_read_signal_strength, | |
1963c907 | 805 | .read_snr = lgdt3303_read_snr, |
6ddcc919 MK |
806 | .read_ucblocks = lgdt330x_read_ucblocks, |
807 | .release = lgdt330x_release, | |
d8667cbb MM |
808 | }; |
809 | ||
1963c907 | 810 | MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver"); |
d8667cbb MM |
811 | MODULE_AUTHOR("Wilson Michaels"); |
812 | MODULE_LICENSE("GPL"); | |
813 | ||
6ddcc919 | 814 | EXPORT_SYMBOL(lgdt330x_attach); |
d8667cbb MM |
815 | |
816 | /* | |
817 | * Local variables: | |
818 | * c-basic-offset: 8 | |
d8667cbb MM |
819 | * End: |
820 | */ |