1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
|
/*
* Driver for Zarlink DVB-T ZL10353 demodulator
*
* Copyright (C) 2006 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "zl10353_priv.h"
#include "zl10353.h"
struct zl10353_state {
struct i2c_adapter *i2c;
struct dvb_frontend frontend;
struct dvb_frontend_ops ops;
struct zl10353_config config;
};
static int debug_regs = 0;
static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 buf[2] = { reg, val };
struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
.buf = buf, .len = 2 };
int err = i2c_transfer(state->i2c, &msg, 1);
if (err != 1) {
printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
return err;
}
return 0;
}
int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen)
{
int err, i;
for (i = 0; i < ilen - 1; i++)
if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
return err;
return 0;
}
static int zl10353_read_register(struct zl10353_state *state, u8 reg)
{
int ret;
u8 b0[1] = { reg };
u8 b1[1] = { 0 };
struct i2c_msg msg[2] = { { .addr = state->config.demod_address,
.flags = 0,
.buf = b0, .len = 1 },
{ .addr = state->config.demod_address,
.flags = I2C_M_RD,
.buf = b1, .len = 1 } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2) {
printk("%s: readreg error (reg=%d, ret==%i)\n",
__FUNCTION__, reg, ret);
return ret;
}
return b1[0];
}
static void zl10353_dump_regs(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
char buf[52], buf2[4];
int ret;
u8 reg;
/* Dump all registers. */
for (reg = 0; ; reg++) {
if (reg % 16 == 0) {
if (reg)
printk(KERN_DEBUG "%s\n", buf);
sprintf(buf, "%02x: ", reg);
}
ret = zl10353_read_register(state, reg);
if (ret >= 0)
sprintf(buf2, "%02x ", (u8)ret);
else
strcpy(buf2, "-- ");
strcat(buf, buf2);
if (reg == 0xff)
break;
}
printk(KERN_DEBUG "%s\n", buf);
}
static int zl10353_sleep(struct dvb_frontend *fe)
{
static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
return 0;
}
static int zl10353_set_parameters(struct dvb_frontend *fe,
struct dvb_frontend_parameters *param)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 pllbuf[6] = { 0x67 };
/* These settings set "auto-everything" and start the FSM. */
zl10353_single_write(fe, 0x55, 0x80);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x01);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x00);
zl10353_single_write(fe, 0x56, 0x28);
zl10353_single_write(fe, 0x89, 0x20);
zl10353_single_write(fe, 0x5E, 0x00);
zl10353_single_write(fe, 0x65, 0x5A);
zl10353_single_write(fe, 0x66, 0xE9);
zl10353_single_write(fe, 0x62, 0x0A);
// if there is no attached secondary tuner, we call set_params to program
// a potential tuner attached somewhere else
if (state->config.no_tuner) {
if (fe->ops->tuner_ops.set_params) {
fe->ops->tuner_ops.set_params(fe, param);
if (fe->ops->i2c_gate_ctrl) fe->ops->i2c_gate_ctrl(fe, 0);
}
}
// if pllbuf is defined, retrieve the settings
if (fe->ops->tuner_ops.pllbuf) {
fe->ops->tuner_ops.pllbuf(fe, param, pllbuf+1, 5);
pllbuf[1] <<= 1;
} else {
// fake pllbuf settings
pllbuf[1] = 0x61 << 1;
pllbuf[2] = 0;
pllbuf[3] = 0;
pllbuf[3] = 0;
pllbuf[4] = 0;
}
// there is no call to _just_ start decoding, so we send the pllbuf anyway
// even if there isn't a PLL attached to the secondary bus
zl10353_write(fe, pllbuf, sizeof(pllbuf));
zl10353_single_write(fe, 0x70, 0x01);
udelay(250);
zl10353_single_write(fe, 0xE4, 0x00);
zl10353_single_write(fe, 0xE5, 0x2A);
zl10353_single_write(fe, 0xE9, 0x02);
zl10353_single_write(fe, 0xE7, 0x40);
zl10353_single_write(fe, 0xE8, 0x10);
return 0;
}
static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct zl10353_state *state = fe->demodulator_priv;
int s6, s7, s8;
if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
return -EREMOTEIO;
if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
return -EREMOTEIO;
if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
return -EREMOTEIO;
*status = 0;
if (s6 & (1 << 2))
*status |= FE_HAS_CARRIER;
if (s6 & (1 << 1))
*status |= FE_HAS_VITERBI;
if (s6 & (1 << 5))
*status |= FE_HAS_LOCK;
if (s7 & (1 << 4))
*status |= FE_HAS_SYNC;
if (s8 & (1 << 6))
*status |= FE_HAS_SIGNAL;
if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
*status &= ~FE_HAS_LOCK;
return 0;
}
static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 _snr;
if (debug_regs)
zl10353_dump_regs(fe);
_snr = zl10353_read_register(state, SNR);
*snr = (_snr << 8) | _snr;
return 0;
}
static int zl10353_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings
*fe_tune_settings)
{
fe_tune_settings->min_delay_ms = 1000;
fe_tune_settings->step_size = 0;
fe_tune_settings->max_drift = 0;
return 0;
}
static int zl10353_init(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
int rc = 0;
if (debug_regs)
zl10353_dump_regs(fe);
/* Do a "hard" reset if not already done */
if (zl10353_read_register(state, 0x50) != 0x03) {
rc = zl10353_write(fe, zl10353_reset_attach,
sizeof(zl10353_reset_attach));
if (debug_regs)
zl10353_dump_regs(fe);
}
return 0;
}
static void zl10353_release(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops zl10353_ops;
struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
struct i2c_adapter *i2c)
{
struct zl10353_state *state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->i2c = i2c;
memcpy(&state->config, config, sizeof(struct zl10353_config));
memcpy(&state->ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
/* check if the demod is there */
if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353)
goto error;
/* create dvb_frontend */
state->frontend.ops = &state->ops;
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static struct dvb_frontend_ops zl10353_ops = {
.info = {
.name = "Zarlink ZL10353 DVB-T",
.type = FE_OFDM,
.frequency_min = 174000000,
.frequency_max = 862000000,
.frequency_stepsize = 166667,
.frequency_tolerance = 0,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
FE_CAN_MUTE_TS
},
.release = zl10353_release,
.init = zl10353_init,
.sleep = zl10353_sleep,
.set_frontend = zl10353_set_parameters,
.get_tune_settings = zl10353_get_tune_settings,
.read_status = zl10353_read_status,
.read_snr = zl10353_read_snr,
};
module_param(debug_regs, int, 0644);
MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
MODULE_AUTHOR("Chris Pascoe");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(zl10353_attach);
EXPORT_SYMBOL(zl10353_write);
|
