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a15c7b42 AP |
1 | /* |
2 | * E3C EC100 demodulator driver | |
3 | * | |
4 | * Copyright (C) 2009 Antti Palosaari <crope@iki.fi> | |
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 | #include "dvb_frontend.h" | |
a15c7b42 AP |
23 | #include "ec100.h" |
24 | ||
a15c7b42 AP |
25 | struct ec100_state { |
26 | struct i2c_adapter *i2c; | |
27 | struct dvb_frontend frontend; | |
28 | struct ec100_config config; | |
29 | ||
30 | u16 ber; | |
31 | }; | |
32 | ||
33 | /* write single register */ | |
34 | static int ec100_write_reg(struct ec100_state *state, u8 reg, u8 val) | |
35 | { | |
0d2d6031 | 36 | int ret; |
a15c7b42 | 37 | u8 buf[2] = {reg, val}; |
0d2d6031 AP |
38 | struct i2c_msg msg[1] = { |
39 | { | |
40 | .addr = state->config.demod_address, | |
41 | .flags = 0, | |
42 | .len = sizeof(buf), | |
43 | .buf = buf, | |
44 | } | |
45 | }; | |
a15c7b42 | 46 | |
0d2d6031 AP |
47 | ret = i2c_transfer(state->i2c, msg, 1); |
48 | if (ret == 1) { | |
49 | ret = 0; | |
50 | } else { | |
51 | dev_warn(&state->i2c->dev, "%s: i2c wr failed=%d reg=%02x\n", | |
52 | KBUILD_MODNAME, ret, reg); | |
53 | ret = -EREMOTEIO; | |
a15c7b42 | 54 | } |
0d2d6031 AP |
55 | |
56 | return ret; | |
a15c7b42 AP |
57 | } |
58 | ||
59 | /* read single register */ | |
60 | static int ec100_read_reg(struct ec100_state *state, u8 reg, u8 *val) | |
61 | { | |
0d2d6031 | 62 | int ret; |
a15c7b42 AP |
63 | struct i2c_msg msg[2] = { |
64 | { | |
65 | .addr = state->config.demod_address, | |
66 | .flags = 0, | |
67 | .len = 1, | |
68 | .buf = ® | |
69 | }, { | |
70 | .addr = state->config.demod_address, | |
71 | .flags = I2C_M_RD, | |
72 | .len = 1, | |
73 | .buf = val | |
74 | } | |
75 | }; | |
76 | ||
0d2d6031 AP |
77 | ret = i2c_transfer(state->i2c, msg, 2); |
78 | if (ret == 2) { | |
79 | ret = 0; | |
80 | } else { | |
81 | dev_warn(&state->i2c->dev, "%s: i2c rd failed=%d reg=%02x\n", | |
82 | KBUILD_MODNAME, ret, reg); | |
83 | ret = -EREMOTEIO; | |
a15c7b42 | 84 | } |
0d2d6031 AP |
85 | |
86 | return ret; | |
a15c7b42 AP |
87 | } |
88 | ||
41943eaf | 89 | static int ec100_set_frontend(struct dvb_frontend *fe) |
a15c7b42 | 90 | { |
41943eaf | 91 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
a15c7b42 AP |
92 | struct ec100_state *state = fe->demodulator_priv; |
93 | int ret; | |
94 | u8 tmp, tmp2; | |
95 | ||
20399b3b AP |
96 | dev_dbg(&state->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n", |
97 | __func__, c->frequency, c->bandwidth_hz); | |
a15c7b42 AP |
98 | |
99 | /* program tuner */ | |
100 | if (fe->ops.tuner_ops.set_params) | |
14d24d14 | 101 | fe->ops.tuner_ops.set_params(fe); |
a15c7b42 AP |
102 | |
103 | ret = ec100_write_reg(state, 0x04, 0x06); | |
104 | if (ret) | |
105 | goto error; | |
106 | ret = ec100_write_reg(state, 0x67, 0x58); | |
107 | if (ret) | |
108 | goto error; | |
109 | ret = ec100_write_reg(state, 0x05, 0x18); | |
110 | if (ret) | |
111 | goto error; | |
112 | ||
113 | /* reg/bw | 6 | 7 | 8 | |
114 | -------+------+------+------ | |
115 | A 0x1b | 0xa1 | 0xe7 | 0x2c | |
116 | A 0x1c | 0x55 | 0x63 | 0x72 | |
117 | -------+------+------+------ | |
118 | B 0x1b | 0xb7 | 0x00 | 0x49 | |
119 | B 0x1c | 0x55 | 0x64 | 0x72 */ | |
120 | ||
41943eaf MCC |
121 | switch (c->bandwidth_hz) { |
122 | case 6000000: | |
a15c7b42 AP |
123 | tmp = 0xb7; |
124 | tmp2 = 0x55; | |
125 | break; | |
41943eaf | 126 | case 7000000: |
a15c7b42 AP |
127 | tmp = 0x00; |
128 | tmp2 = 0x64; | |
129 | break; | |
41943eaf | 130 | case 8000000: |
a15c7b42 AP |
131 | default: |
132 | tmp = 0x49; | |
133 | tmp2 = 0x72; | |
134 | } | |
135 | ||
136 | ret = ec100_write_reg(state, 0x1b, tmp); | |
137 | if (ret) | |
138 | goto error; | |
139 | ret = ec100_write_reg(state, 0x1c, tmp2); | |
140 | if (ret) | |
141 | goto error; | |
142 | ||
143 | ret = ec100_write_reg(state, 0x0c, 0xbb); /* if freq */ | |
144 | if (ret) | |
145 | goto error; | |
146 | ret = ec100_write_reg(state, 0x0d, 0x31); /* if freq */ | |
147 | if (ret) | |
148 | goto error; | |
149 | ||
150 | ret = ec100_write_reg(state, 0x08, 0x24); | |
151 | if (ret) | |
152 | goto error; | |
153 | ||
154 | ret = ec100_write_reg(state, 0x00, 0x00); /* go */ | |
155 | if (ret) | |
156 | goto error; | |
157 | ret = ec100_write_reg(state, 0x00, 0x20); /* go */ | |
158 | if (ret) | |
159 | goto error; | |
160 | ||
161 | return ret; | |
162 | error: | |
20399b3b | 163 | dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret); |
a15c7b42 AP |
164 | return ret; |
165 | } | |
166 | ||
167 | static int ec100_get_tune_settings(struct dvb_frontend *fe, | |
168 | struct dvb_frontend_tune_settings *fesettings) | |
169 | { | |
170 | fesettings->min_delay_ms = 300; | |
171 | fesettings->step_size = 0; | |
172 | fesettings->max_drift = 0; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
0df289a2 | 177 | static int ec100_read_status(struct dvb_frontend *fe, enum fe_status *status) |
a15c7b42 AP |
178 | { |
179 | struct ec100_state *state = fe->demodulator_priv; | |
180 | int ret; | |
181 | u8 tmp; | |
182 | *status = 0; | |
183 | ||
184 | ret = ec100_read_reg(state, 0x42, &tmp); | |
185 | if (ret) | |
186 | goto error; | |
187 | ||
188 | if (tmp & 0x80) { | |
189 | /* bit7 set - have lock */ | |
190 | *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | | |
191 | FE_HAS_SYNC | FE_HAS_LOCK; | |
192 | } else { | |
193 | ret = ec100_read_reg(state, 0x01, &tmp); | |
194 | if (ret) | |
195 | goto error; | |
196 | ||
197 | if (tmp & 0x10) { | |
198 | /* bit4 set - have signal */ | |
199 | *status |= FE_HAS_SIGNAL; | |
200 | if (!(tmp & 0x01)) { | |
201 | /* bit0 clear - have ~valid signal */ | |
202 | *status |= FE_HAS_CARRIER | FE_HAS_VITERBI; | |
203 | } | |
204 | } | |
205 | } | |
206 | ||
207 | return ret; | |
208 | error: | |
20399b3b | 209 | dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret); |
a15c7b42 AP |
210 | return ret; |
211 | } | |
212 | ||
213 | static int ec100_read_ber(struct dvb_frontend *fe, u32 *ber) | |
214 | { | |
215 | struct ec100_state *state = fe->demodulator_priv; | |
216 | int ret; | |
217 | u8 tmp, tmp2; | |
218 | u16 ber2; | |
219 | ||
220 | *ber = 0; | |
221 | ||
222 | ret = ec100_read_reg(state, 0x65, &tmp); | |
223 | if (ret) | |
224 | goto error; | |
225 | ret = ec100_read_reg(state, 0x66, &tmp2); | |
226 | if (ret) | |
227 | goto error; | |
228 | ||
229 | ber2 = (tmp2 << 8) | tmp; | |
230 | ||
231 | /* if counter overflow or clear */ | |
232 | if (ber2 < state->ber) | |
233 | *ber = ber2; | |
234 | else | |
235 | *ber = ber2 - state->ber; | |
236 | ||
237 | state->ber = ber2; | |
238 | ||
239 | return ret; | |
240 | error: | |
20399b3b | 241 | dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret); |
a15c7b42 AP |
242 | return ret; |
243 | } | |
244 | ||
245 | static int ec100_read_signal_strength(struct dvb_frontend *fe, u16 *strength) | |
246 | { | |
247 | struct ec100_state *state = fe->demodulator_priv; | |
248 | int ret; | |
249 | u8 tmp; | |
250 | ||
251 | ret = ec100_read_reg(state, 0x24, &tmp); | |
252 | if (ret) { | |
253 | *strength = 0; | |
254 | goto error; | |
255 | } | |
256 | ||
257 | *strength = ((tmp << 8) | tmp); | |
258 | ||
259 | return ret; | |
260 | error: | |
20399b3b | 261 | dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret); |
a15c7b42 AP |
262 | return ret; |
263 | } | |
264 | ||
265 | static int ec100_read_snr(struct dvb_frontend *fe, u16 *snr) | |
266 | { | |
267 | *snr = 0; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int ec100_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) | |
272 | { | |
273 | *ucblocks = 0; | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static void ec100_release(struct dvb_frontend *fe) | |
278 | { | |
279 | struct ec100_state *state = fe->demodulator_priv; | |
280 | kfree(state); | |
281 | } | |
282 | ||
283 | static struct dvb_frontend_ops ec100_ops; | |
284 | ||
285 | struct dvb_frontend *ec100_attach(const struct ec100_config *config, | |
286 | struct i2c_adapter *i2c) | |
287 | { | |
288 | int ret; | |
289 | struct ec100_state *state = NULL; | |
290 | u8 tmp; | |
291 | ||
292 | /* allocate memory for the internal state */ | |
293 | state = kzalloc(sizeof(struct ec100_state), GFP_KERNEL); | |
294 | if (state == NULL) | |
295 | goto error; | |
296 | ||
297 | /* setup the state */ | |
298 | state->i2c = i2c; | |
299 | memcpy(&state->config, config, sizeof(struct ec100_config)); | |
300 | ||
301 | /* check if the demod is there */ | |
302 | ret = ec100_read_reg(state, 0x33, &tmp); | |
303 | if (ret || tmp != 0x0b) | |
304 | goto error; | |
305 | ||
306 | /* create dvb_frontend */ | |
307 | memcpy(&state->frontend.ops, &ec100_ops, | |
308 | sizeof(struct dvb_frontend_ops)); | |
309 | state->frontend.demodulator_priv = state; | |
310 | ||
311 | return &state->frontend; | |
312 | error: | |
313 | kfree(state); | |
314 | return NULL; | |
315 | } | |
316 | EXPORT_SYMBOL(ec100_attach); | |
317 | ||
318 | static struct dvb_frontend_ops ec100_ops = { | |
41943eaf | 319 | .delsys = { SYS_DVBT }, |
a15c7b42 AP |
320 | .info = { |
321 | .name = "E3C EC100 DVB-T", | |
a15c7b42 AP |
322 | .caps = |
323 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | | |
324 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | | |
325 | FE_CAN_QPSK | FE_CAN_QAM_16 | | |
326 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | | |
327 | FE_CAN_TRANSMISSION_MODE_AUTO | | |
328 | FE_CAN_GUARD_INTERVAL_AUTO | | |
329 | FE_CAN_HIERARCHY_AUTO | | |
330 | FE_CAN_MUTE_TS | |
331 | }, | |
332 | ||
333 | .release = ec100_release, | |
41943eaf | 334 | .set_frontend = ec100_set_frontend, |
a15c7b42 AP |
335 | .get_tune_settings = ec100_get_tune_settings, |
336 | .read_status = ec100_read_status, | |
337 | .read_ber = ec100_read_ber, | |
338 | .read_signal_strength = ec100_read_signal_strength, | |
339 | .read_snr = ec100_read_snr, | |
340 | .read_ucblocks = ec100_read_ucblocks, | |
341 | }; | |
342 | ||
343 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); | |
344 | MODULE_DESCRIPTION("E3C EC100 DVB-T demodulator driver"); | |
345 | MODULE_LICENSE("GPL"); |