blob: 2b95e8b6cd3973dd8613f3edbe47e97c5b4871f4 [file] [log] [blame]
Chris Pascoe780dfef2006-02-28 08:34:59 -03001/*
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
34struct zl10353_state {
35 struct i2c_adapter *i2c;
36 struct dvb_frontend frontend;
Chris Pascoe780dfef2006-02-28 08:34:59 -030037
38 struct zl10353_config config;
39};
40
41static int debug_regs = 0;
42
43static 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
57int 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
67static 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
Adrian Bunkc04e89b2006-03-15 16:17:11 -030090static void zl10353_dump_regs(struct dvb_frontend *fe)
Chris Pascoe780dfef2006-02-28 08:34:59 -030091{
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
116static 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
124static int zl10353_set_parameters(struct dvb_frontend *fe,
125 struct dvb_frontend_parameters *param)
126{
Andrew de Quincey8dec0732006-04-18 17:47:12 -0300127 struct zl10353_state *state = fe->demodulator_priv;
128
Chris Pascoe780dfef2006-02-28 08:34:59 -0300129 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
Andrew de Quincey8dec0732006-04-18 17:47:12 -0300145 // 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) {
Patrick Boettcherdea74862006-05-14 05:01:31 -0300148 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);
Andrew de Quincey8dec0732006-04-18 17:47:12 -0300151 }
152 }
153
154 // if pllbuf is defined, retrieve the settings
Patrick Boettcherdea74862006-05-14 05:01:31 -0300155 if (fe->ops.tuner_ops.calc_regs) {
156 fe->ops.tuner_ops.calc_regs(fe, param, pllbuf+1, 5);
Andrew de Quinceye994b8d2006-04-18 17:47:11 -0300157 pllbuf[1] <<= 1;
Andrew de Quincey8dec0732006-04-18 17:47:12 -0300158 } 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;
Andrew de Quinceye994b8d2006-04-18 17:47:11 -0300165 }
Chris Pascoe780dfef2006-02-28 08:34:59 -0300166
Andrew de Quincey8dec0732006-04-18 17:47:12 -0300167 // 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
Chris Pascoe780dfef2006-02-28 08:34:59 -0300171 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
182static 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
213static 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
227static 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
238static 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
258static void zl10353_release(struct dvb_frontend *fe)
259{
260 struct zl10353_state *state = fe->demodulator_priv;
261
262 kfree(state);
263}
264
265static struct dvb_frontend_ops zl10353_ops;
266
267struct 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));
Chris Pascoe780dfef2006-02-28 08:34:59 -0300280
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 */
Patrick Boettcherdea74862006-05-14 05:01:31 -0300286 memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
Chris Pascoe780dfef2006-02-28 08:34:59 -0300287 state->frontend.demodulator_priv = state;
288
289 return &state->frontend;
290error:
291 kfree(state);
292 return NULL;
293}
294
295static 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
325module_param(debug_regs, int, 0644);
326MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
327
328MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
329MODULE_AUTHOR("Chris Pascoe");
330MODULE_LICENSE("GPL");
331
332EXPORT_SYMBOL(zl10353_attach);
333EXPORT_SYMBOL(zl10353_write);