Commit | Line | Data |
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780dfef3 CP |
1 | /* |
2 | * Driver for Zarlink DVB-T ZL10353 demodulator | |
3 | * | |
4 | * Copyright (C) 2006 Christopher Pascoe <c.pascoe@itee.uq.edu.au> | |
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 | * | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.= | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
780dfef3 CP |
24 | #include <linux/init.h> |
25 | #include <linux/delay.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/slab.h> | |
28 | ||
29 | #include "dvb_frontend.h" | |
30 | #include "zl10353_priv.h" | |
31 | #include "zl10353.h" | |
32 | ||
33 | struct zl10353_state { | |
34 | struct i2c_adapter *i2c; | |
35 | struct dvb_frontend frontend; | |
780dfef3 CP |
36 | |
37 | struct zl10353_config config; | |
38 | }; | |
39 | ||
f7f57770 AP |
40 | static int debug; |
41 | #define dprintk(args...) \ | |
42 | do { \ | |
43 | if (debug) printk(KERN_DEBUG "zl10353: " args); \ | |
44 | } while (0) | |
45 | ||
780dfef3 CP |
46 | static int debug_regs = 0; |
47 | ||
48 | static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val) | |
49 | { | |
50 | struct zl10353_state *state = fe->demodulator_priv; | |
51 | u8 buf[2] = { reg, val }; | |
52 | struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0, | |
53 | .buf = buf, .len = 2 }; | |
54 | int err = i2c_transfer(state->i2c, &msg, 1); | |
55 | if (err != 1) { | |
56 | printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err); | |
57 | return err; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
34630409 | 62 | static int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen) |
780dfef3 CP |
63 | { |
64 | int err, i; | |
65 | for (i = 0; i < ilen - 1; i++) | |
66 | if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1]))) | |
67 | return err; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static int zl10353_read_register(struct zl10353_state *state, u8 reg) | |
73 | { | |
74 | int ret; | |
75 | u8 b0[1] = { reg }; | |
76 | u8 b1[1] = { 0 }; | |
77 | struct i2c_msg msg[2] = { { .addr = state->config.demod_address, | |
78 | .flags = 0, | |
79 | .buf = b0, .len = 1 }, | |
80 | { .addr = state->config.demod_address, | |
81 | .flags = I2C_M_RD, | |
82 | .buf = b1, .len = 1 } }; | |
83 | ||
84 | ret = i2c_transfer(state->i2c, msg, 2); | |
85 | ||
86 | if (ret != 2) { | |
87 | printk("%s: readreg error (reg=%d, ret==%i)\n", | |
88 | __FUNCTION__, reg, ret); | |
89 | return ret; | |
90 | } | |
91 | ||
92 | return b1[0]; | |
93 | } | |
94 | ||
c04e89b1 | 95 | static void zl10353_dump_regs(struct dvb_frontend *fe) |
780dfef3 CP |
96 | { |
97 | struct zl10353_state *state = fe->demodulator_priv; | |
98 | char buf[52], buf2[4]; | |
99 | int ret; | |
100 | u8 reg; | |
101 | ||
102 | /* Dump all registers. */ | |
103 | for (reg = 0; ; reg++) { | |
104 | if (reg % 16 == 0) { | |
105 | if (reg) | |
106 | printk(KERN_DEBUG "%s\n", buf); | |
107 | sprintf(buf, "%02x: ", reg); | |
108 | } | |
109 | ret = zl10353_read_register(state, reg); | |
110 | if (ret >= 0) | |
111 | sprintf(buf2, "%02x ", (u8)ret); | |
112 | else | |
113 | strcpy(buf2, "-- "); | |
114 | strcat(buf, buf2); | |
115 | if (reg == 0xff) | |
116 | break; | |
117 | } | |
118 | printk(KERN_DEBUG "%s\n", buf); | |
119 | } | |
120 | ||
f7f57770 AP |
121 | static void zl10353_calc_nominal_rate(struct dvb_frontend *fe, |
122 | enum fe_bandwidth bandwidth, | |
123 | u16 *nominal_rate) | |
124 | { | |
78f3b0b6 | 125 | u32 adc_clock = 45056; /* 45.056 MHz */ |
f7f57770 AP |
126 | u8 bw; |
127 | struct zl10353_state *state = fe->demodulator_priv; | |
128 | ||
129 | if (state->config.adc_clock) | |
130 | adc_clock = state->config.adc_clock; | |
131 | ||
132 | switch (bandwidth) { | |
133 | case BANDWIDTH_6_MHZ: | |
134 | bw = 6; | |
135 | break; | |
136 | case BANDWIDTH_7_MHZ: | |
137 | bw = 7; | |
138 | break; | |
139 | case BANDWIDTH_8_MHZ: | |
140 | default: | |
141 | bw = 8; | |
142 | break; | |
143 | } | |
144 | ||
78f3b0b6 | 145 | *nominal_rate = (bw * (1 << 23) / 7 * 125 + adc_clock / 2) / adc_clock; |
f7f57770 AP |
146 | |
147 | dprintk("%s: bw %d, adc_clock %d => 0x%x\n", | |
148 | __FUNCTION__, bw, adc_clock, *nominal_rate); | |
149 | } | |
150 | ||
780dfef3 CP |
151 | static int zl10353_sleep(struct dvb_frontend *fe) |
152 | { | |
153 | static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 }; | |
154 | ||
155 | zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown)); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int zl10353_set_parameters(struct dvb_frontend *fe, | |
160 | struct dvb_frontend_parameters *param) | |
161 | { | |
8dec0732 | 162 | struct zl10353_state *state = fe->demodulator_priv; |
f7f57770 | 163 | u16 nominal_rate; |
780dfef3 CP |
164 | u8 pllbuf[6] = { 0x67 }; |
165 | ||
166 | /* These settings set "auto-everything" and start the FSM. */ | |
167 | zl10353_single_write(fe, 0x55, 0x80); | |
168 | udelay(200); | |
169 | zl10353_single_write(fe, 0xEA, 0x01); | |
170 | udelay(200); | |
171 | zl10353_single_write(fe, 0xEA, 0x00); | |
172 | ||
173 | zl10353_single_write(fe, 0x56, 0x28); | |
174 | zl10353_single_write(fe, 0x89, 0x20); | |
175 | zl10353_single_write(fe, 0x5E, 0x00); | |
f7f57770 AP |
176 | |
177 | zl10353_calc_nominal_rate(fe, param->u.ofdm.bandwidth, &nominal_rate); | |
178 | zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate)); | |
179 | zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate)); | |
180 | ||
fc3398d8 CP |
181 | zl10353_single_write(fe, 0x6C, 0xCD); |
182 | zl10353_single_write(fe, 0x6D, 0x7E); | |
0a11bb86 AP |
183 | if (fe->ops.i2c_gate_ctrl) |
184 | fe->ops.i2c_gate_ctrl(fe, 0); | |
780dfef3 | 185 | |
8dec0732 AQ |
186 | // if there is no attached secondary tuner, we call set_params to program |
187 | // a potential tuner attached somewhere else | |
188 | if (state->config.no_tuner) { | |
dea74869 PB |
189 | if (fe->ops.tuner_ops.set_params) { |
190 | fe->ops.tuner_ops.set_params(fe, param); | |
0a11bb86 AP |
191 | if (fe->ops.i2c_gate_ctrl) |
192 | fe->ops.i2c_gate_ctrl(fe, 0); | |
8dec0732 AQ |
193 | } |
194 | } | |
195 | ||
196 | // if pllbuf is defined, retrieve the settings | |
dea74869 PB |
197 | if (fe->ops.tuner_ops.calc_regs) { |
198 | fe->ops.tuner_ops.calc_regs(fe, param, pllbuf+1, 5); | |
e994b8d9 | 199 | pllbuf[1] <<= 1; |
8dec0732 AQ |
200 | } else { |
201 | // fake pllbuf settings | |
202 | pllbuf[1] = 0x61 << 1; | |
203 | pllbuf[2] = 0; | |
204 | pllbuf[3] = 0; | |
205 | pllbuf[3] = 0; | |
206 | pllbuf[4] = 0; | |
e994b8d9 | 207 | } |
780dfef3 | 208 | |
8dec0732 AQ |
209 | // there is no call to _just_ start decoding, so we send the pllbuf anyway |
210 | // even if there isn't a PLL attached to the secondary bus | |
211 | zl10353_write(fe, pllbuf, sizeof(pllbuf)); | |
212 | ||
fc3398d8 | 213 | zl10353_single_write(fe, 0x5F, 0x13); |
780dfef3 CP |
214 | zl10353_single_write(fe, 0x70, 0x01); |
215 | udelay(250); | |
216 | zl10353_single_write(fe, 0xE4, 0x00); | |
217 | zl10353_single_write(fe, 0xE5, 0x2A); | |
218 | zl10353_single_write(fe, 0xE9, 0x02); | |
219 | zl10353_single_write(fe, 0xE7, 0x40); | |
220 | zl10353_single_write(fe, 0xE8, 0x10); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status) | |
226 | { | |
227 | struct zl10353_state *state = fe->demodulator_priv; | |
228 | int s6, s7, s8; | |
229 | ||
230 | if ((s6 = zl10353_read_register(state, STATUS_6)) < 0) | |
231 | return -EREMOTEIO; | |
232 | if ((s7 = zl10353_read_register(state, STATUS_7)) < 0) | |
233 | return -EREMOTEIO; | |
234 | if ((s8 = zl10353_read_register(state, STATUS_8)) < 0) | |
235 | return -EREMOTEIO; | |
236 | ||
237 | *status = 0; | |
238 | if (s6 & (1 << 2)) | |
239 | *status |= FE_HAS_CARRIER; | |
240 | if (s6 & (1 << 1)) | |
241 | *status |= FE_HAS_VITERBI; | |
242 | if (s6 & (1 << 5)) | |
243 | *status |= FE_HAS_LOCK; | |
244 | if (s7 & (1 << 4)) | |
245 | *status |= FE_HAS_SYNC; | |
246 | if (s8 & (1 << 6)) | |
247 | *status |= FE_HAS_SIGNAL; | |
248 | ||
249 | if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != | |
250 | (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) | |
251 | *status &= ~FE_HAS_LOCK; | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
67b60aad CP |
256 | static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber) |
257 | { | |
258 | struct zl10353_state *state = fe->demodulator_priv; | |
259 | ||
6345f0f6 CP |
260 | *ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 | |
261 | zl10353_read_register(state, RS_ERR_CNT_1) << 8 | | |
262 | zl10353_read_register(state, RS_ERR_CNT_0); | |
67b60aad CP |
263 | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength) | |
268 | { | |
269 | struct zl10353_state *state = fe->demodulator_priv; | |
270 | ||
6345f0f6 CP |
271 | u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 | |
272 | zl10353_read_register(state, AGC_GAIN_0) << 2 | 3; | |
67b60aad CP |
273 | |
274 | *strength = ~signal; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
780dfef3 CP |
279 | static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr) |
280 | { | |
281 | struct zl10353_state *state = fe->demodulator_priv; | |
282 | u8 _snr; | |
283 | ||
284 | if (debug_regs) | |
285 | zl10353_dump_regs(fe); | |
286 | ||
287 | _snr = zl10353_read_register(state, SNR); | |
288 | *snr = (_snr << 8) | _snr; | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
67b60aad CP |
293 | static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
294 | { | |
295 | struct zl10353_state *state = fe->demodulator_priv; | |
296 | ||
6345f0f6 CP |
297 | *ucblocks = zl10353_read_register(state, RS_UBC_1) << 8 | |
298 | zl10353_read_register(state, RS_UBC_0); | |
67b60aad CP |
299 | |
300 | return 0; | |
301 | } | |
302 | ||
780dfef3 CP |
303 | static int zl10353_get_tune_settings(struct dvb_frontend *fe, |
304 | struct dvb_frontend_tune_settings | |
305 | *fe_tune_settings) | |
306 | { | |
307 | fe_tune_settings->min_delay_ms = 1000; | |
308 | fe_tune_settings->step_size = 0; | |
309 | fe_tune_settings->max_drift = 0; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static int zl10353_init(struct dvb_frontend *fe) | |
315 | { | |
316 | struct zl10353_state *state = fe->demodulator_priv; | |
317 | u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F }; | |
318 | int rc = 0; | |
319 | ||
320 | if (debug_regs) | |
321 | zl10353_dump_regs(fe); | |
8fb95784 CP |
322 | if (state->config.parallel_ts) |
323 | zl10353_reset_attach[2] &= ~0x20; | |
780dfef3 CP |
324 | |
325 | /* Do a "hard" reset if not already done */ | |
8fb95784 CP |
326 | if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] || |
327 | zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) { | |
780dfef3 CP |
328 | rc = zl10353_write(fe, zl10353_reset_attach, |
329 | sizeof(zl10353_reset_attach)); | |
330 | if (debug_regs) | |
331 | zl10353_dump_regs(fe); | |
332 | } | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
0a11bb86 AP |
337 | static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) |
338 | { | |
339 | u8 val = 0x0a; | |
340 | ||
341 | if (enable) | |
342 | val |= 0x10; | |
343 | ||
344 | return zl10353_single_write(fe, 0x62, val); | |
345 | } | |
346 | ||
780dfef3 CP |
347 | static void zl10353_release(struct dvb_frontend *fe) |
348 | { | |
349 | struct zl10353_state *state = fe->demodulator_priv; | |
780dfef3 CP |
350 | kfree(state); |
351 | } | |
352 | ||
353 | static struct dvb_frontend_ops zl10353_ops; | |
354 | ||
355 | struct dvb_frontend *zl10353_attach(const struct zl10353_config *config, | |
356 | struct i2c_adapter *i2c) | |
357 | { | |
358 | struct zl10353_state *state = NULL; | |
359 | ||
360 | /* allocate memory for the internal state */ | |
361 | state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL); | |
362 | if (state == NULL) | |
363 | goto error; | |
364 | ||
365 | /* setup the state */ | |
366 | state->i2c = i2c; | |
367 | memcpy(&state->config, config, sizeof(struct zl10353_config)); | |
780dfef3 CP |
368 | |
369 | /* check if the demod is there */ | |
370 | if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353) | |
371 | goto error; | |
372 | ||
373 | /* create dvb_frontend */ | |
dea74869 | 374 | memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops)); |
780dfef3 CP |
375 | state->frontend.demodulator_priv = state; |
376 | ||
377 | return &state->frontend; | |
378 | error: | |
379 | kfree(state); | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | static struct dvb_frontend_ops zl10353_ops = { | |
384 | ||
385 | .info = { | |
386 | .name = "Zarlink ZL10353 DVB-T", | |
387 | .type = FE_OFDM, | |
388 | .frequency_min = 174000000, | |
389 | .frequency_max = 862000000, | |
390 | .frequency_stepsize = 166667, | |
391 | .frequency_tolerance = 0, | |
392 | .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | | |
393 | FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | | |
394 | FE_CAN_FEC_AUTO | | |
395 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | | |
396 | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | | |
397 | FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER | | |
398 | FE_CAN_MUTE_TS | |
399 | }, | |
400 | ||
401 | .release = zl10353_release, | |
402 | ||
403 | .init = zl10353_init, | |
404 | .sleep = zl10353_sleep, | |
0a11bb86 | 405 | .i2c_gate_ctrl = zl10353_i2c_gate_ctrl, |
c10d14d6 | 406 | .write = zl10353_write, |
780dfef3 CP |
407 | |
408 | .set_frontend = zl10353_set_parameters, | |
409 | .get_tune_settings = zl10353_get_tune_settings, | |
410 | ||
411 | .read_status = zl10353_read_status, | |
67b60aad CP |
412 | .read_ber = zl10353_read_ber, |
413 | .read_signal_strength = zl10353_read_signal_strength, | |
780dfef3 | 414 | .read_snr = zl10353_read_snr, |
67b60aad | 415 | .read_ucblocks = zl10353_read_ucblocks, |
780dfef3 CP |
416 | }; |
417 | ||
f7f57770 AP |
418 | module_param(debug, int, 0644); |
419 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
420 | ||
780dfef3 CP |
421 | module_param(debug_regs, int, 0644); |
422 | MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off)."); | |
423 | ||
424 | MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver"); | |
425 | MODULE_AUTHOR("Chris Pascoe"); | |
426 | MODULE_LICENSE("GPL"); | |
427 | ||
428 | EXPORT_SYMBOL(zl10353_attach); |