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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> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/slab.h> | |
29 | ||
30 | #include "dvb_frontend.h" | |
31 | #include "zl10353_priv.h" | |
32 | #include "zl10353.h" | |
33 | ||
34 | struct zl10353_state { | |
35 | struct i2c_adapter *i2c; | |
36 | struct dvb_frontend frontend; | |
780dfef3 CP |
37 | |
38 | struct zl10353_config config; | |
39 | }; | |
40 | ||
41 | static int debug_regs = 0; | |
42 | ||
43 | static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val) | |
44 | { | |
45 | struct zl10353_state *state = fe->demodulator_priv; | |
46 | u8 buf[2] = { reg, val }; | |
47 | struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0, | |
48 | .buf = buf, .len = 2 }; | |
49 | int err = i2c_transfer(state->i2c, &msg, 1); | |
50 | if (err != 1) { | |
51 | printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err); | |
52 | return err; | |
53 | } | |
54 | return 0; | |
55 | } | |
56 | ||
57 | int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen) | |
58 | { | |
59 | int err, i; | |
60 | for (i = 0; i < ilen - 1; i++) | |
61 | if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1]))) | |
62 | return err; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | static int zl10353_read_register(struct zl10353_state *state, u8 reg) | |
68 | { | |
69 | int ret; | |
70 | u8 b0[1] = { reg }; | |
71 | u8 b1[1] = { 0 }; | |
72 | struct i2c_msg msg[2] = { { .addr = state->config.demod_address, | |
73 | .flags = 0, | |
74 | .buf = b0, .len = 1 }, | |
75 | { .addr = state->config.demod_address, | |
76 | .flags = I2C_M_RD, | |
77 | .buf = b1, .len = 1 } }; | |
78 | ||
79 | ret = i2c_transfer(state->i2c, msg, 2); | |
80 | ||
81 | if (ret != 2) { | |
82 | printk("%s: readreg error (reg=%d, ret==%i)\n", | |
83 | __FUNCTION__, reg, ret); | |
84 | return ret; | |
85 | } | |
86 | ||
87 | return b1[0]; | |
88 | } | |
89 | ||
c04e89b1 | 90 | static void zl10353_dump_regs(struct dvb_frontend *fe) |
780dfef3 CP |
91 | { |
92 | struct zl10353_state *state = fe->demodulator_priv; | |
93 | char buf[52], buf2[4]; | |
94 | int ret; | |
95 | u8 reg; | |
96 | ||
97 | /* Dump all registers. */ | |
98 | for (reg = 0; ; reg++) { | |
99 | if (reg % 16 == 0) { | |
100 | if (reg) | |
101 | printk(KERN_DEBUG "%s\n", buf); | |
102 | sprintf(buf, "%02x: ", reg); | |
103 | } | |
104 | ret = zl10353_read_register(state, reg); | |
105 | if (ret >= 0) | |
106 | sprintf(buf2, "%02x ", (u8)ret); | |
107 | else | |
108 | strcpy(buf2, "-- "); | |
109 | strcat(buf, buf2); | |
110 | if (reg == 0xff) | |
111 | break; | |
112 | } | |
113 | printk(KERN_DEBUG "%s\n", buf); | |
114 | } | |
115 | ||
116 | static int zl10353_sleep(struct dvb_frontend *fe) | |
117 | { | |
118 | static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 }; | |
119 | ||
120 | zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown)); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int zl10353_set_parameters(struct dvb_frontend *fe, | |
125 | struct dvb_frontend_parameters *param) | |
126 | { | |
8dec0732 AQ |
127 | struct zl10353_state *state = fe->demodulator_priv; |
128 | ||
780dfef3 CP |
129 | u8 pllbuf[6] = { 0x67 }; |
130 | ||
131 | /* These settings set "auto-everything" and start the FSM. */ | |
132 | zl10353_single_write(fe, 0x55, 0x80); | |
133 | udelay(200); | |
134 | zl10353_single_write(fe, 0xEA, 0x01); | |
135 | udelay(200); | |
136 | zl10353_single_write(fe, 0xEA, 0x00); | |
137 | ||
138 | zl10353_single_write(fe, 0x56, 0x28); | |
139 | zl10353_single_write(fe, 0x89, 0x20); | |
140 | zl10353_single_write(fe, 0x5E, 0x00); | |
141 | zl10353_single_write(fe, 0x65, 0x5A); | |
142 | zl10353_single_write(fe, 0x66, 0xE9); | |
143 | zl10353_single_write(fe, 0x62, 0x0A); | |
144 | ||
8dec0732 AQ |
145 | // if there is no attached secondary tuner, we call set_params to program |
146 | // a potential tuner attached somewhere else | |
147 | if (state->config.no_tuner) { | |
dea74869 PB |
148 | if (fe->ops.tuner_ops.set_params) { |
149 | fe->ops.tuner_ops.set_params(fe, param); | |
150 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); | |
8dec0732 AQ |
151 | } |
152 | } | |
153 | ||
154 | // if pllbuf is defined, retrieve the settings | |
dea74869 PB |
155 | if (fe->ops.tuner_ops.calc_regs) { |
156 | fe->ops.tuner_ops.calc_regs(fe, param, pllbuf+1, 5); | |
e994b8d9 | 157 | pllbuf[1] <<= 1; |
8dec0732 AQ |
158 | } else { |
159 | // fake pllbuf settings | |
160 | pllbuf[1] = 0x61 << 1; | |
161 | pllbuf[2] = 0; | |
162 | pllbuf[3] = 0; | |
163 | pllbuf[3] = 0; | |
164 | pllbuf[4] = 0; | |
e994b8d9 | 165 | } |
780dfef3 | 166 | |
8dec0732 AQ |
167 | // there is no call to _just_ start decoding, so we send the pllbuf anyway |
168 | // even if there isn't a PLL attached to the secondary bus | |
169 | zl10353_write(fe, pllbuf, sizeof(pllbuf)); | |
170 | ||
780dfef3 CP |
171 | zl10353_single_write(fe, 0x70, 0x01); |
172 | udelay(250); | |
173 | zl10353_single_write(fe, 0xE4, 0x00); | |
174 | zl10353_single_write(fe, 0xE5, 0x2A); | |
175 | zl10353_single_write(fe, 0xE9, 0x02); | |
176 | zl10353_single_write(fe, 0xE7, 0x40); | |
177 | zl10353_single_write(fe, 0xE8, 0x10); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status) | |
183 | { | |
184 | struct zl10353_state *state = fe->demodulator_priv; | |
185 | int s6, s7, s8; | |
186 | ||
187 | if ((s6 = zl10353_read_register(state, STATUS_6)) < 0) | |
188 | return -EREMOTEIO; | |
189 | if ((s7 = zl10353_read_register(state, STATUS_7)) < 0) | |
190 | return -EREMOTEIO; | |
191 | if ((s8 = zl10353_read_register(state, STATUS_8)) < 0) | |
192 | return -EREMOTEIO; | |
193 | ||
194 | *status = 0; | |
195 | if (s6 & (1 << 2)) | |
196 | *status |= FE_HAS_CARRIER; | |
197 | if (s6 & (1 << 1)) | |
198 | *status |= FE_HAS_VITERBI; | |
199 | if (s6 & (1 << 5)) | |
200 | *status |= FE_HAS_LOCK; | |
201 | if (s7 & (1 << 4)) | |
202 | *status |= FE_HAS_SYNC; | |
203 | if (s8 & (1 << 6)) | |
204 | *status |= FE_HAS_SIGNAL; | |
205 | ||
206 | if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != | |
207 | (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) | |
208 | *status &= ~FE_HAS_LOCK; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr) | |
214 | { | |
215 | struct zl10353_state *state = fe->demodulator_priv; | |
216 | u8 _snr; | |
217 | ||
218 | if (debug_regs) | |
219 | zl10353_dump_regs(fe); | |
220 | ||
221 | _snr = zl10353_read_register(state, SNR); | |
222 | *snr = (_snr << 8) | _snr; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int zl10353_get_tune_settings(struct dvb_frontend *fe, | |
228 | struct dvb_frontend_tune_settings | |
229 | *fe_tune_settings) | |
230 | { | |
231 | fe_tune_settings->min_delay_ms = 1000; | |
232 | fe_tune_settings->step_size = 0; | |
233 | fe_tune_settings->max_drift = 0; | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int zl10353_init(struct dvb_frontend *fe) | |
239 | { | |
240 | struct zl10353_state *state = fe->demodulator_priv; | |
241 | u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F }; | |
242 | int rc = 0; | |
243 | ||
244 | if (debug_regs) | |
245 | zl10353_dump_regs(fe); | |
246 | ||
247 | /* Do a "hard" reset if not already done */ | |
248 | if (zl10353_read_register(state, 0x50) != 0x03) { | |
249 | rc = zl10353_write(fe, zl10353_reset_attach, | |
250 | sizeof(zl10353_reset_attach)); | |
251 | if (debug_regs) | |
252 | zl10353_dump_regs(fe); | |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static void zl10353_release(struct dvb_frontend *fe) | |
259 | { | |
260 | struct zl10353_state *state = fe->demodulator_priv; | |
261 | ||
262 | kfree(state); | |
263 | } | |
264 | ||
265 | static struct dvb_frontend_ops zl10353_ops; | |
266 | ||
267 | struct dvb_frontend *zl10353_attach(const struct zl10353_config *config, | |
268 | struct i2c_adapter *i2c) | |
269 | { | |
270 | struct zl10353_state *state = NULL; | |
271 | ||
272 | /* allocate memory for the internal state */ | |
273 | state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL); | |
274 | if (state == NULL) | |
275 | goto error; | |
276 | ||
277 | /* setup the state */ | |
278 | state->i2c = i2c; | |
279 | memcpy(&state->config, config, sizeof(struct zl10353_config)); | |
780dfef3 CP |
280 | |
281 | /* check if the demod is there */ | |
282 | if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353) | |
283 | goto error; | |
284 | ||
285 | /* create dvb_frontend */ | |
dea74869 | 286 | memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops)); |
780dfef3 CP |
287 | state->frontend.demodulator_priv = state; |
288 | ||
289 | return &state->frontend; | |
290 | error: | |
291 | kfree(state); | |
292 | return NULL; | |
293 | } | |
294 | ||
295 | static struct dvb_frontend_ops zl10353_ops = { | |
296 | ||
297 | .info = { | |
298 | .name = "Zarlink ZL10353 DVB-T", | |
299 | .type = FE_OFDM, | |
300 | .frequency_min = 174000000, | |
301 | .frequency_max = 862000000, | |
302 | .frequency_stepsize = 166667, | |
303 | .frequency_tolerance = 0, | |
304 | .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | | |
305 | FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | | |
306 | FE_CAN_FEC_AUTO | | |
307 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | | |
308 | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | | |
309 | FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER | | |
310 | FE_CAN_MUTE_TS | |
311 | }, | |
312 | ||
313 | .release = zl10353_release, | |
314 | ||
315 | .init = zl10353_init, | |
316 | .sleep = zl10353_sleep, | |
317 | ||
318 | .set_frontend = zl10353_set_parameters, | |
319 | .get_tune_settings = zl10353_get_tune_settings, | |
320 | ||
321 | .read_status = zl10353_read_status, | |
322 | .read_snr = zl10353_read_snr, | |
323 | }; | |
324 | ||
325 | module_param(debug_regs, int, 0644); | |
326 | MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off)."); | |
327 | ||
328 | MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver"); | |
329 | MODULE_AUTHOR("Chris Pascoe"); | |
330 | MODULE_LICENSE("GPL"); | |
331 | ||
332 | EXPORT_SYMBOL(zl10353_attach); | |
333 | EXPORT_SYMBOL(zl10353_write); |