2 Auvitek AU8522 QAM/8VSB demodulator driver
4 Copyright (C) 2008 Steven Toth <stoth@hauppauge.com>
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.
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.
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.
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/string.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include "dvb_frontend.h"
34 struct i2c_adapter *i2c;
36 /* configuration settings */
37 const struct au8522_config *config;
39 struct dvb_frontend frontend;
41 u32 current_frequency;
42 fe_modulation_t current_modulation;
47 #define dprintk if (debug) printk
49 /* 16 bit registers, 8 bit values */
50 static int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)
53 u8 buf [] = { reg >> 8, reg & 0xff, data };
55 struct i2c_msg msg = { .addr = state->config->demod_address,
56 .flags = 0, .buf = buf, .len = 3 };
58 ret = i2c_transfer(state->i2c, &msg, 1);
61 printk("%s: writereg error (reg == 0x%02x, val == 0x%04x, "
62 "ret == %i)\n", __func__, reg, data, ret);
64 return (ret != 1) ? -1 : 0;
67 static u8 au8522_readreg(struct au8522_state *state, u16 reg)
70 u8 b0 [] = { reg >> 8, reg & 0xff };
73 struct i2c_msg msg [] = {
74 { .addr = state->config->demod_address, .flags = 0,
75 .buf = b0, .len = 2 },
76 { .addr = state->config->demod_address, .flags = I2C_M_RD,
77 .buf = b1, .len = 1 } };
79 ret = i2c_transfer(state->i2c, msg, 2);
82 printk(KERN_ERR "%s: readreg error (ret == %i)\n",
87 static int au8522_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
89 struct au8522_state *state = fe->demodulator_priv;
91 dprintk("%s(%d)\n", __func__, enable);
94 return au8522_writereg(state, 0x106, 1);
96 return au8522_writereg(state, 0x106, 0);
99 static int au8522_enable_modulation(struct dvb_frontend *fe,
102 struct au8522_state *state = fe->demodulator_priv;
104 dprintk("%s(0x%08x)\n", __func__, m);
108 dprintk("%s() VSB_8\n", __func__);
110 //au8522_writereg(state, 0x410b, 0x84); // Serial
112 //au8522_writereg(state, 0x8090, 0x82);
113 au8522_writereg(state, 0x8090, 0x84);
114 au8522_writereg(state, 0x4092, 0x11);
115 au8522_writereg(state, 0x2005, 0x00);
116 au8522_writereg(state, 0x8091, 0x80);
118 au8522_writereg(state, 0x80a3, 0x0c);
119 au8522_writereg(state, 0x80a4, 0xe8);
120 au8522_writereg(state, 0x8081, 0xc4);
121 au8522_writereg(state, 0x80a5, 0x40);
122 au8522_writereg(state, 0x80a7, 0x40);
123 au8522_writereg(state, 0x80a6, 0x67);
124 au8522_writereg(state, 0x8262, 0x20);
125 au8522_writereg(state, 0x821c, 0x30);
126 au8522_writereg(state, 0x80d8, 0x1a);
127 au8522_writereg(state, 0x8227, 0xa0);
128 au8522_writereg(state, 0x8121, 0xff);
129 au8522_writereg(state, 0x80a8, 0xf0);
130 au8522_writereg(state, 0x80a9, 0x05);
131 au8522_writereg(state, 0x80aa, 0x77);
132 au8522_writereg(state, 0x80ab, 0xf0);
133 au8522_writereg(state, 0x80ac, 0x05);
134 au8522_writereg(state, 0x80ad, 0x77);
135 au8522_writereg(state, 0x80ae, 0x41);
136 au8522_writereg(state, 0x80af, 0x66);
137 au8522_writereg(state, 0x821b, 0xcc);
138 au8522_writereg(state, 0x821d, 0x80);
139 au8522_writereg(state, 0x80b5, 0xfb);
140 au8522_writereg(state, 0x80b6, 0x8e);
141 au8522_writereg(state, 0x80b7, 0x39);
142 au8522_writereg(state, 0x80a4, 0xe8);
143 au8522_writereg(state, 0x8231, 0x13);
147 au8522_writereg(state, 0x80a3, 0x09);
148 au8522_writereg(state, 0x80a4, 0x00);
149 au8522_writereg(state, 0x8081, 0xc4);
150 au8522_writereg(state, 0x80a5, 0x40);
151 au8522_writereg(state, 0x80b5, 0xfb);
152 au8522_writereg(state, 0x80b6, 0x8e);
153 au8522_writereg(state, 0x80b7, 0x39);
154 au8522_writereg(state, 0x80aa, 0x77);
155 au8522_writereg(state, 0x80ad, 0x77);
156 au8522_writereg(state, 0x80a6, 0x67);
157 au8522_writereg(state, 0x8262, 0x20);
158 au8522_writereg(state, 0x821c, 0x30);
159 au8522_writereg(state, 0x80b8, 0x3e);
160 au8522_writereg(state, 0x80b9, 0xf0);
161 au8522_writereg(state, 0x80ba, 0x01);
162 au8522_writereg(state, 0x80bb, 0x18);
163 au8522_writereg(state, 0x80bc, 0x50);
164 au8522_writereg(state, 0x80bd, 0x00);
165 au8522_writereg(state, 0x80be, 0xea);
166 au8522_writereg(state, 0x80bf, 0xef);
167 au8522_writereg(state, 0x80c0, 0xfc);
168 au8522_writereg(state, 0x80c1, 0xbd);
169 au8522_writereg(state, 0x80c2, 0x1f);
170 au8522_writereg(state, 0x80c3, 0xfc);
171 au8522_writereg(state, 0x80c4, 0xdd);
172 au8522_writereg(state, 0x80c5, 0xaf);
173 au8522_writereg(state, 0x80c6, 0x00);
174 au8522_writereg(state, 0x80c7, 0x38);
175 au8522_writereg(state, 0x80c8, 0x30);
176 au8522_writereg(state, 0x80c9, 0x05);
177 au8522_writereg(state, 0x80ca, 0x4a);
178 au8522_writereg(state, 0x80cb, 0xd0);
179 au8522_writereg(state, 0x80cc, 0x01);
180 au8522_writereg(state, 0x80cd, 0xd9);
181 au8522_writereg(state, 0x80ce, 0x6f);
182 au8522_writereg(state, 0x80cf, 0xf9);
183 au8522_writereg(state, 0x80d0, 0x70);
184 au8522_writereg(state, 0x80d1, 0xdf);
185 au8522_writereg(state, 0x80d2, 0xf7);
186 au8522_writereg(state, 0x80d3, 0xc2);
187 au8522_writereg(state, 0x80d4, 0xdf);
188 au8522_writereg(state, 0x80d5, 0x02);
189 au8522_writereg(state, 0x80d6, 0x9a);
190 au8522_writereg(state, 0x80d7, 0xd0);
191 au8522_writereg(state, 0x8250, 0x0d);
192 au8522_writereg(state, 0x8251, 0xcd);
193 au8522_writereg(state, 0x8252, 0xe0);
194 au8522_writereg(state, 0x8253, 0x05);
195 au8522_writereg(state, 0x8254, 0xa7);
196 au8522_writereg(state, 0x8255, 0xff);
197 au8522_writereg(state, 0x8256, 0xed);
198 au8522_writereg(state, 0x8257, 0x5b);
199 au8522_writereg(state, 0x8258, 0xae);
200 au8522_writereg(state, 0x8259, 0xe6);
201 au8522_writereg(state, 0x825a, 0x3d);
202 au8522_writereg(state, 0x825b, 0x0f);
203 au8522_writereg(state, 0x825c, 0x0d);
204 au8522_writereg(state, 0x825d, 0xea);
205 au8522_writereg(state, 0x825e, 0xf2);
206 au8522_writereg(state, 0x825f, 0x51);
207 au8522_writereg(state, 0x8260, 0xf5);
208 au8522_writereg(state, 0x8261, 0x06);
209 au8522_writereg(state, 0x821a, 0x00);
210 au8522_writereg(state, 0x8546, 0x40);
211 au8522_writereg(state, 0x8210, 0x26);
212 au8522_writereg(state, 0x8211, 0xf6);
213 au8522_writereg(state, 0x8212, 0x84);
214 au8522_writereg(state, 0x8213, 0x02);
215 au8522_writereg(state, 0x8502, 0x01);
216 au8522_writereg(state, 0x8121, 0x04);
217 au8522_writereg(state, 0x8122, 0x04);
218 au8522_writereg(state, 0x852e, 0x10);
219 au8522_writereg(state, 0x80a4, 0xca);
220 au8522_writereg(state, 0x80a7, 0x40);
221 au8522_writereg(state, 0x8526, 0x01);
224 dprintk("%s() Invalid modulation\n", __func__);
228 state->current_modulation = m;
233 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
234 static int au8522_set_frontend(struct dvb_frontend *fe,
235 struct dvb_frontend_parameters *p)
237 struct au8522_state *state = fe->demodulator_priv;
239 dprintk("%s(frequency=%d)\n", __func__, p->frequency);
241 state->current_frequency = p->frequency;
243 au8522_enable_modulation(fe, p->u.vsb.modulation);
245 /* Allow the demod to settle */
248 if (fe->ops.tuner_ops.set_params) {
249 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1);
250 fe->ops.tuner_ops.set_params(fe, p);
251 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
257 /* Reset the demod hardware and reset all of the configuration registers
258 to a default state. */
259 static int au8522_init(struct dvb_frontend *fe)
261 struct au8522_state *state = fe->demodulator_priv;
262 dprintk("%s()\n", __func__);
264 au8522_writereg(state, 0xa4, 1 << 5);
266 au8522_i2c_gate_ctrl(fe, 1);
271 static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status)
273 struct au8522_state *state = fe->demodulator_priv;
275 u32 tuner_status = 0;
279 if (state->current_modulation == VSB_8) {
280 dprintk("%s() Checking VSB_8\n", __func__);
281 //au8522_writereg(state, 0x80a4, 0x20);
282 reg = au8522_readreg(state, 0x4088);
284 *status |= FE_HAS_VITERBI;
286 *status |= FE_HAS_LOCK | FE_HAS_SYNC;
288 dprintk("%s() Checking QAM\n", __func__);
289 reg = au8522_readreg(state, 0x4541);
291 *status |= FE_HAS_VITERBI;
293 *status |= FE_HAS_LOCK | FE_HAS_SYNC;
296 switch(state->config->status_mode) {
297 case AU8522_DEMODLOCKING:
298 dprintk("%s() DEMODLOCKING\n", __func__);
299 if (*status & FE_HAS_VITERBI)
300 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
302 case AU8522_TUNERLOCKING:
303 /* Get the tuner status */
304 dprintk("%s() TUNERLOCKING\n", __func__);
305 if (fe->ops.tuner_ops.get_status) {
306 if (fe->ops.i2c_gate_ctrl)
307 fe->ops.i2c_gate_ctrl(fe, 1);
309 fe->ops.tuner_ops.get_status(fe, &tuner_status);
311 if (fe->ops.i2c_gate_ctrl)
312 fe->ops.i2c_gate_ctrl(fe, 0);
315 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
319 dprintk("%s() status 0x%08x\n", __func__, *status);
324 static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr)
326 dprintk("%s()\n", __func__);
333 static int au8522_read_signal_strength(struct dvb_frontend *fe,
334 u16 *signal_strength)
336 return au8522_read_snr(fe, signal_strength);
339 static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
341 struct au8522_state *state = fe->demodulator_priv;
343 *ucblocks = au8522_readreg(state, 0x4087);
348 static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber)
350 return au8522_read_ucblocks(fe, ber);
353 static int au8522_get_frontend(struct dvb_frontend *fe,
354 struct dvb_frontend_parameters *p)
356 struct au8522_state *state = fe->demodulator_priv;
358 p->frequency = state->current_frequency;
359 p->u.vsb.modulation = state->current_modulation;
364 static int au8522_get_tune_settings(struct dvb_frontend *fe,
365 struct dvb_frontend_tune_settings *tune)
367 tune->min_delay_ms = 1000;
371 static void au8522_release(struct dvb_frontend *fe)
373 struct au8522_state *state = fe->demodulator_priv;
377 static struct dvb_frontend_ops au8522_ops;
379 struct dvb_frontend *au8522_attach(const struct au8522_config *config,
380 struct i2c_adapter *i2c)
382 struct au8522_state *state = NULL;
384 /* allocate memory for the internal state */
385 state = kmalloc(sizeof(struct au8522_state), GFP_KERNEL);
389 /* setup the state */
390 state->config = config;
392 /* create dvb_frontend */
393 memcpy(&state->frontend.ops, &au8522_ops,
394 sizeof(struct dvb_frontend_ops));
395 state->frontend.demodulator_priv = state;
397 if (au8522_init(&state->frontend) != 0) {
398 printk(KERN_ERR "%s: Failed to initialize correctly\n",
403 /* Note: Leaving the I2C gate open here. */
404 au8522_i2c_gate_ctrl(&state->frontend, 1);
406 return &state->frontend;
413 static struct dvb_frontend_ops au8522_ops = {
416 .name = "Auvitek AU8522 QAM/8VSB Frontend",
418 .frequency_min = 54000000,
419 .frequency_max = 858000000,
420 .frequency_stepsize = 62500,
421 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
425 .i2c_gate_ctrl = au8522_i2c_gate_ctrl,
426 .set_frontend = au8522_set_frontend,
427 .get_frontend = au8522_get_frontend,
428 .get_tune_settings = au8522_get_tune_settings,
429 .read_status = au8522_read_status,
430 .read_ber = au8522_read_ber,
431 .read_signal_strength = au8522_read_signal_strength,
432 .read_snr = au8522_read_snr,
433 .read_ucblocks = au8522_read_ucblocks,
434 .release = au8522_release,
437 module_param(debug, int, 0644);
438 MODULE_PARM_DESC(debug, "Enable verbose debug messages");
440 MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver");
441 MODULE_AUTHOR("Steven Toth");
442 MODULE_LICENSE("GPL");
444 EXPORT_SYMBOL(au8522_attach);