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5eca4823 AT |
1 | /* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver. |
2 | * | |
3 | * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp> | |
4 | * | |
5 | * This module is based off the the gl861 and vp702x modules. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the Free | |
9 | * Software Foundation, version 2. | |
10 | * | |
11 | * see Documentation/dvb/README.dvb-usb for more information | |
12 | */ | |
13 | #include <linux/init.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/slab.h> | |
16 | ||
17 | #include "friio.h" | |
18 | ||
19 | struct jdvbt90502_state { | |
20 | struct i2c_adapter *i2c; | |
21 | struct dvb_frontend frontend; | |
22 | struct jdvbt90502_config config; | |
23 | }; | |
24 | ||
25 | /* NOTE: TC90502 has 16bit register-address? */ | |
26 | /* register 0x0100 is used for reading PLL status, so reg is u16 here */ | |
27 | static int jdvbt90502_reg_read(struct jdvbt90502_state *state, | |
28 | const u16 reg, u8 *buf, const size_t count) | |
29 | { | |
30 | int ret; | |
31 | u8 wbuf[3]; | |
32 | struct i2c_msg msg[2]; | |
33 | ||
34 | wbuf[0] = reg & 0xFF; | |
35 | wbuf[1] = 0; | |
36 | wbuf[2] = reg >> 8; | |
37 | ||
38 | msg[0].addr = state->config.demod_address; | |
39 | msg[0].flags = 0; | |
40 | msg[0].buf = wbuf; | |
41 | msg[0].len = sizeof(wbuf); | |
42 | ||
43 | msg[1].addr = msg[0].addr; | |
44 | msg[1].flags = I2C_M_RD; | |
45 | msg[1].buf = buf; | |
46 | msg[1].len = count; | |
47 | ||
48 | ret = i2c_transfer(state->i2c, msg, 2); | |
49 | if (ret != 2) { | |
50 | deb_fe(" reg read failed.\n"); | |
51 | return -EREMOTEIO; | |
52 | } | |
53 | return 0; | |
54 | } | |
55 | ||
56 | /* currently 16bit register-address is not used, so reg is u8 here */ | |
57 | static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state, | |
58 | const u8 reg, const u8 val) | |
59 | { | |
60 | struct i2c_msg msg; | |
61 | u8 wbuf[2]; | |
62 | ||
63 | wbuf[0] = reg; | |
64 | wbuf[1] = val; | |
65 | ||
66 | msg.addr = state->config.demod_address; | |
67 | msg.flags = 0; | |
68 | msg.buf = wbuf; | |
69 | msg.len = sizeof(wbuf); | |
70 | ||
71 | if (i2c_transfer(state->i2c, &msg, 1) != 1) { | |
72 | deb_fe(" reg write failed."); | |
73 | return -EREMOTEIO; | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | ||
2e4e98e7 | 78 | static int _jdvbt90502_write(struct dvb_frontend *fe, const u8 buf[], int len) |
5eca4823 AT |
79 | { |
80 | struct jdvbt90502_state *state = fe->demodulator_priv; | |
81 | int err, i; | |
82 | for (i = 0; i < len - 1; i++) { | |
83 | err = jdvbt90502_single_reg_write(state, | |
84 | buf[0] + i, buf[i + 1]); | |
85 | if (err) | |
86 | return err; | |
87 | } | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | /* read pll status byte via the demodulator's I2C register */ | |
93 | /* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */ | |
94 | static int jdvbt90502_pll_read(struct jdvbt90502_state *state, u8 *result) | |
95 | { | |
96 | int ret; | |
97 | ||
98 | /* +1 for reading */ | |
99 | u8 pll_addr_byte = (state->config.pll_address << 1) + 1; | |
100 | ||
101 | *result = 0; | |
102 | ||
103 | ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG, | |
104 | pll_addr_byte); | |
105 | if (ret) | |
106 | goto error; | |
107 | ||
108 | ret = jdvbt90502_reg_read(state, 0x0100, result, 1); | |
109 | if (ret) | |
110 | goto error; | |
111 | ||
112 | deb_fe("PLL read val:%02x\n", *result); | |
113 | return 0; | |
114 | ||
115 | error: | |
116 | deb_fe("%s:ret == %d\n", __func__, ret); | |
117 | return -EREMOTEIO; | |
118 | } | |
119 | ||
120 | ||
121 | /* set pll frequency via the demodulator's I2C register */ | |
122 | static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq) | |
123 | { | |
124 | int ret; | |
125 | int retry; | |
126 | u8 res1; | |
127 | u8 res2[9]; | |
128 | ||
129 | u8 pll_freq_cmd[PLL_CMD_LEN]; | |
130 | u8 pll_agc_cmd[PLL_CMD_LEN]; | |
131 | struct i2c_msg msg[2]; | |
132 | u32 f; | |
133 | ||
134 | deb_fe("%s: freq=%d, step=%d\n", __func__, freq, | |
135 | state->frontend.ops.info.frequency_stepsize); | |
136 | /* freq -> oscilator frequency conversion. */ | |
0e2f0d34 | 137 | /* freq: 473,000,000 + n*6,000,000 [+ 142857 (center freq. shift)] */ |
5eca4823 | 138 | f = freq / state->frontend.ops.info.frequency_stepsize; |
0e2f0d34 AT |
139 | /* add 399[1/7 MHZ] = 57MHz for the IF */ |
140 | f += 399; | |
141 | /* add center frequency shift if necessary */ | |
142 | if (f % 7 == 0) | |
143 | f++; | |
5eca4823 AT |
144 | pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */ |
145 | pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1; | |
146 | pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F; | |
147 | pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF; | |
148 | pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */ | |
149 | pll_freq_cmd[BANDSWITCH_BYTE] = 0x08; /* UHF band */ | |
150 | ||
151 | msg[0].addr = state->config.demod_address; | |
152 | msg[0].flags = 0; | |
153 | msg[0].buf = pll_freq_cmd; | |
154 | msg[0].len = sizeof(pll_freq_cmd); | |
155 | ||
156 | ret = i2c_transfer(state->i2c, &msg[0], 1); | |
157 | if (ret != 1) | |
158 | goto error; | |
159 | ||
160 | udelay(50); | |
161 | ||
162 | pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG]; | |
163 | pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE]; | |
164 | pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1]; | |
165 | pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2]; | |
166 | pll_agc_cmd[CONTROL_BYTE] = 0x9A; /* AGC_CTRL instead of BANDSWITCH */ | |
167 | pll_agc_cmd[AGC_CTRL_BYTE] = 0x50; | |
168 | /* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */ | |
169 | ||
170 | msg[1].addr = msg[0].addr; | |
171 | msg[1].flags = 0; | |
172 | msg[1].buf = pll_agc_cmd; | |
173 | msg[1].len = sizeof(pll_agc_cmd); | |
174 | ||
175 | ret = i2c_transfer(state->i2c, &msg[1], 1); | |
176 | if (ret != 1) | |
177 | goto error; | |
178 | ||
179 | /* I don't know what these cmds are for, */ | |
180 | /* but the USB log on a windows box contains them */ | |
181 | ret = jdvbt90502_single_reg_write(state, 0x01, 0x40); | |
182 | ret |= jdvbt90502_single_reg_write(state, 0x01, 0x00); | |
183 | if (ret) | |
184 | goto error; | |
185 | udelay(100); | |
186 | ||
187 | /* wait for the demod to be ready? */ | |
188 | #define RETRY_COUNT 5 | |
189 | for (retry = 0; retry < RETRY_COUNT; retry++) { | |
190 | ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1); | |
191 | if (ret) | |
192 | goto error; | |
193 | /* if (res1 != 0x00) goto error; */ | |
194 | ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2)); | |
195 | if (ret) | |
196 | goto error; | |
197 | if (res2[0] >= 0xA7) | |
198 | break; | |
199 | msleep(100); | |
200 | } | |
201 | if (retry >= RETRY_COUNT) { | |
202 | deb_fe("%s: FE does not get ready after freq setting.\n", | |
203 | __func__); | |
204 | return -EREMOTEIO; | |
205 | } | |
206 | ||
207 | return 0; | |
208 | error: | |
209 | deb_fe("%s:ret == %d\n", __func__, ret); | |
210 | return -EREMOTEIO; | |
211 | } | |
212 | ||
213 | static int jdvbt90502_read_status(struct dvb_frontend *fe, fe_status_t *state) | |
214 | { | |
215 | u8 result; | |
216 | int ret; | |
217 | ||
218 | *state = FE_HAS_SIGNAL; | |
219 | ||
220 | ret = jdvbt90502_pll_read(fe->demodulator_priv, &result); | |
221 | if (ret) { | |
222 | deb_fe("%s:ret == %d\n", __func__, ret); | |
223 | return -EREMOTEIO; | |
224 | } | |
225 | ||
226 | *state = FE_HAS_SIGNAL | |
227 | | FE_HAS_CARRIER | |
228 | | FE_HAS_VITERBI | |
229 | | FE_HAS_SYNC; | |
230 | ||
231 | if (result & PLL_STATUS_LOCKED) | |
232 | *state |= FE_HAS_LOCK; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
5eca4823 AT |
237 | static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe, |
238 | u16 *strength) | |
239 | { | |
240 | int ret; | |
241 | u8 rbuf[37]; | |
242 | ||
243 | *strength = 0; | |
244 | ||
245 | /* status register (incl. signal strength) : 0x89 */ | |
246 | /* TODO: read just the necessary registers [0x8B..0x8D]? */ | |
247 | ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089, | |
248 | rbuf, sizeof(rbuf)); | |
249 | ||
250 | if (ret) { | |
251 | deb_fe("%s:ret == %d\n", __func__, ret); | |
252 | return -EREMOTEIO; | |
253 | } | |
254 | ||
255 | /* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */ | |
256 | *strength = (rbuf[3] << 8) + rbuf[4]; | |
257 | if (rbuf[2]) | |
258 | *strength = 0xffff; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
5eca4823 | 263 | |
ad12f07b AT |
264 | /* filter out un-supported properties to notify users */ |
265 | static int jdvbt90502_set_property(struct dvb_frontend *fe, | |
266 | struct dtv_property *tvp) | |
267 | { | |
268 | int r = 0; | |
269 | ||
270 | switch (tvp->cmd) { | |
271 | case DTV_DELIVERY_SYSTEM: | |
272 | if (tvp->u.data != SYS_ISDBT) | |
273 | r = -EINVAL; | |
274 | break; | |
275 | case DTV_CLEAR: | |
276 | case DTV_TUNE: | |
277 | case DTV_FREQUENCY: | |
278 | break; | |
279 | default: | |
280 | r = -EINVAL; | |
281 | } | |
282 | return r; | |
283 | } | |
284 | ||
7c61d80a | 285 | static int jdvbt90502_get_frontend(struct dvb_frontend *fe) |
5eca4823 | 286 | { |
7c61d80a | 287 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
5eca4823 | 288 | p->inversion = INVERSION_AUTO; |
955c41c0 MCC |
289 | p->bandwidth_hz = 6000000; |
290 | p->code_rate_HP = FEC_AUTO; | |
291 | p->code_rate_LP = FEC_AUTO; | |
292 | p->modulation = QAM_64; | |
293 | p->transmission_mode = TRANSMISSION_MODE_AUTO; | |
294 | p->guard_interval = GUARD_INTERVAL_AUTO; | |
295 | p->hierarchy = HIERARCHY_AUTO; | |
5eca4823 AT |
296 | return 0; |
297 | } | |
298 | ||
955c41c0 | 299 | static int jdvbt90502_set_frontend(struct dvb_frontend *fe) |
5eca4823 | 300 | { |
955c41c0 MCC |
301 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
302 | ||
5eca4823 | 303 | /** |
88393161 | 304 | * NOTE: ignore all the parameters except frequency. |
5eca4823 AT |
305 | * others should be fixed to the proper value for ISDB-T, |
306 | * but don't check here. | |
307 | */ | |
308 | ||
309 | struct jdvbt90502_state *state = fe->demodulator_priv; | |
310 | int ret; | |
311 | ||
312 | deb_fe("%s: Freq:%d\n", __func__, p->frequency); | |
313 | ||
ad12f07b AT |
314 | /* for recovery from DTV_CLEAN */ |
315 | fe->dtv_property_cache.delivery_system = SYS_ISDBT; | |
316 | ||
5eca4823 AT |
317 | ret = jdvbt90502_pll_set_freq(state, p->frequency); |
318 | if (ret) { | |
319 | deb_fe("%s:ret == %d\n", __func__, ret); | |
320 | return -EREMOTEIO; | |
321 | } | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
5eca4823 AT |
326 | |
327 | /** | |
328 | * (reg, val) commad list to initialize this module. | |
329 | * captured on a Windows box. | |
330 | */ | |
331 | static u8 init_code[][2] = { | |
332 | {0x01, 0x40}, | |
333 | {0x04, 0x38}, | |
334 | {0x05, 0x40}, | |
335 | {0x07, 0x40}, | |
336 | {0x0F, 0x4F}, | |
337 | {0x11, 0x21}, | |
338 | {0x12, 0x0B}, | |
339 | {0x13, 0x2F}, | |
340 | {0x14, 0x31}, | |
341 | {0x16, 0x02}, | |
342 | {0x21, 0xC4}, | |
343 | {0x22, 0x20}, | |
344 | {0x2C, 0x79}, | |
345 | {0x2D, 0x34}, | |
346 | {0x2F, 0x00}, | |
347 | {0x30, 0x28}, | |
348 | {0x31, 0x31}, | |
349 | {0x32, 0xDF}, | |
350 | {0x38, 0x01}, | |
351 | {0x39, 0x78}, | |
352 | {0x3B, 0x33}, | |
353 | {0x3C, 0x33}, | |
354 | {0x48, 0x90}, | |
355 | {0x51, 0x68}, | |
356 | {0x5E, 0x38}, | |
357 | {0x71, 0x00}, | |
358 | {0x72, 0x08}, | |
359 | {0x77, 0x00}, | |
360 | {0xC0, 0x21}, | |
361 | {0xC1, 0x10}, | |
362 | {0xE4, 0x1A}, | |
363 | {0xEA, 0x1F}, | |
364 | {0x77, 0x00}, | |
365 | {0x71, 0x00}, | |
366 | {0x71, 0x00}, | |
367 | {0x76, 0x0C}, | |
368 | }; | |
369 | ||
7b2d3983 | 370 | static const int init_code_len = sizeof(init_code) / sizeof(u8[2]); |
5eca4823 AT |
371 | |
372 | static int jdvbt90502_init(struct dvb_frontend *fe) | |
373 | { | |
374 | int i = -1; | |
375 | int ret; | |
376 | struct i2c_msg msg; | |
377 | ||
378 | struct jdvbt90502_state *state = fe->demodulator_priv; | |
379 | ||
380 | deb_fe("%s called.\n", __func__); | |
381 | ||
382 | msg.addr = state->config.demod_address; | |
383 | msg.flags = 0; | |
384 | msg.len = 2; | |
385 | for (i = 0; i < init_code_len; i++) { | |
386 | msg.buf = init_code[i]; | |
387 | ret = i2c_transfer(state->i2c, &msg, 1); | |
388 | if (ret != 1) | |
389 | goto error; | |
390 | } | |
ad12f07b | 391 | fe->dtv_property_cache.delivery_system = SYS_ISDBT; |
5eca4823 AT |
392 | msleep(100); |
393 | ||
394 | return 0; | |
395 | ||
396 | error: | |
397 | deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret); | |
398 | return -EREMOTEIO; | |
399 | } | |
400 | ||
401 | ||
402 | static void jdvbt90502_release(struct dvb_frontend *fe) | |
403 | { | |
404 | struct jdvbt90502_state *state = fe->demodulator_priv; | |
405 | kfree(state); | |
406 | } | |
407 | ||
408 | ||
409 | static struct dvb_frontend_ops jdvbt90502_ops; | |
410 | ||
411 | struct dvb_frontend *jdvbt90502_attach(struct dvb_usb_device *d) | |
412 | { | |
413 | struct jdvbt90502_state *state = NULL; | |
414 | ||
415 | deb_info("%s called.\n", __func__); | |
416 | ||
417 | /* allocate memory for the internal state */ | |
418 | state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL); | |
419 | if (state == NULL) | |
420 | goto error; | |
421 | ||
422 | /* setup the state */ | |
423 | state->i2c = &d->i2c_adap; | |
424 | memcpy(&state->config, &friio_fe_config, sizeof(friio_fe_config)); | |
425 | ||
426 | /* create dvb_frontend */ | |
427 | memcpy(&state->frontend.ops, &jdvbt90502_ops, | |
428 | sizeof(jdvbt90502_ops)); | |
429 | state->frontend.demodulator_priv = state; | |
430 | ||
431 | if (jdvbt90502_init(&state->frontend) < 0) | |
432 | goto error; | |
433 | ||
434 | return &state->frontend; | |
435 | ||
436 | error: | |
437 | kfree(state); | |
438 | return NULL; | |
439 | } | |
440 | ||
441 | static struct dvb_frontend_ops jdvbt90502_ops = { | |
955c41c0 | 442 | .delsys = { SYS_ISDBT }, |
5eca4823 AT |
443 | .info = { |
444 | .name = "Comtech JDVBT90502 ISDB-T", | |
5eca4823 AT |
445 | .frequency_min = 473000000, /* UHF 13ch, center */ |
446 | .frequency_max = 767142857, /* UHF 62ch, center */ | |
955c41c0 | 447 | .frequency_stepsize = JDVBT90502_PLL_CLK / JDVBT90502_PLL_DIVIDER, |
5eca4823 AT |
448 | .frequency_tolerance = 0, |
449 | ||
450 | /* NOTE: this driver ignores all parameters but frequency. */ | |
451 | .caps = FE_CAN_INVERSION_AUTO | | |
452 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | | |
453 | FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | | |
454 | FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO | | |
455 | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | | |
456 | FE_CAN_TRANSMISSION_MODE_AUTO | | |
457 | FE_CAN_GUARD_INTERVAL_AUTO | | |
458 | FE_CAN_HIERARCHY_AUTO, | |
459 | }, | |
460 | ||
461 | .release = jdvbt90502_release, | |
462 | ||
463 | .init = jdvbt90502_init, | |
5eca4823 AT |
464 | .write = _jdvbt90502_write, |
465 | ||
ad12f07b AT |
466 | .set_property = jdvbt90502_set_property, |
467 | ||
955c41c0 MCC |
468 | .set_frontend = jdvbt90502_set_frontend, |
469 | .get_frontend = jdvbt90502_get_frontend, | |
5eca4823 AT |
470 | |
471 | .read_status = jdvbt90502_read_status, | |
5eca4823 | 472 | .read_signal_strength = jdvbt90502_read_signal_strength, |
5eca4823 | 473 | }; |