2 * Driver for Zarlink zl10036 DVB-S silicon tuner
4 * Copyright (C) 2006 Tino Reichardt
5 * Copyright (C) 2007-2009 Matthias Schwarzott <zzam@gentoo.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License Version 2, as
9 * published by the Free Software Foundation.
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.
21 * The data sheet for this tuner can be found at:
22 * http://www.mcmilk.de/projects/dvb-card/datasheets/ZL10036.pdf
24 * This one is working: (at my Avermedia DVB-S Pro)
25 * - zl10036 (40pin, FTA)
27 * A driver for zl10038 should be very similar.
30 #include <linux/module.h>
31 #include <linux/dvb/frontend.h>
32 #include <asm/types.h>
36 static int zl10036_debug;
37 #define dprintk(level, args...) \
38 do { if (zl10036_debug & level) printk(KERN_DEBUG "zl10036: " args); \
41 #define deb_info(args...) dprintk(0x01, args)
42 #define deb_i2c(args...) dprintk(0x02, args)
44 struct zl10036_state {
45 struct i2c_adapter *i2c;
46 const struct zl10036_config *config;
52 /* This driver assumes the tuner is driven by a 10.111MHz Cristal */
55 /* Some of the possible dividers:
56 * 64, (write 0x05 to reg), freq step size 158kHz
57 * 10, (write 0x0a to reg), freq step size 1.011kHz (used here)
58 * 5, (write 0x09 to reg), freq step size 2.022kHz
62 #define _RDIV_REG 0x0a
63 #define _FR (_XTAL/_RDIV)
65 #define STATUS_POR 0x80 /* Power on Reset */
66 #define STATUS_FL 0x40 /* Frequency & Phase Lock */
68 /* read/write for zl10036 and zl10038 */
70 static int zl10036_read_status_reg(struct zl10036_state *state)
73 struct i2c_msg msg[1] = {
74 { .addr = state->config->tuner_address, .flags = I2C_M_RD,
75 .buf = &status, .len = sizeof(status) },
78 if (i2c_transfer(state->i2c, msg, 1) != 1) {
79 printk(KERN_ERR "%s: i2c read failed at addr=%02x\n",
80 __func__, state->config->tuner_address);
84 deb_i2c("R(status): %02x [FL=%d]\n", status,
85 (status & STATUS_FL) ? 1 : 0);
86 if (status & STATUS_POR)
87 deb_info("%s: Power-On-Reset bit enabled - "
88 "need to initialize the tuner\n", __func__);
93 static int zl10036_write(struct zl10036_state *state, u8 buf[], u8 count)
95 struct i2c_msg msg[1] = {
96 { .addr = state->config->tuner_address, .flags = 0,
97 .buf = buf, .len = count },
102 if (zl10036_debug & 0x02) {
103 /* every 8bit-value satisifes this!
104 * so only check for debug log */
105 if ((buf[0] & 0x80) == 0x00)
107 else if ((buf[0] & 0xc0) == 0x80)
109 else if ((buf[0] & 0xf0) == 0xc0)
111 else if ((buf[0] & 0xf0) == 0xd0)
113 else if ((buf[0] & 0xf0) == 0xe0)
115 else if ((buf[0] & 0xf0) == 0xf0)
118 deb_i2c("W(%d):", reg);
121 for (i = 0; i < count; i++)
122 printk(KERN_CONT " %02x", buf[i]);
123 printk(KERN_CONT "\n");
127 ret = i2c_transfer(state->i2c, msg, 1);
129 printk(KERN_ERR "%s: i2c error, ret=%d\n", __func__, ret);
136 static int zl10036_release(struct dvb_frontend *fe)
138 struct zl10036_state *state = fe->tuner_priv;
140 fe->tuner_priv = NULL;
146 static int zl10036_sleep(struct dvb_frontend *fe)
148 struct zl10036_state *state = fe->tuner_priv;
149 u8 buf[] = { 0xf0, 0x80 }; /* regs 12/13 */
152 deb_info("%s\n", __func__);
154 if (fe->ops.i2c_gate_ctrl)
155 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
157 ret = zl10036_write(state, buf, sizeof(buf));
159 if (fe->ops.i2c_gate_ctrl)
160 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
166 * register map of the ZL10036/ZL10038
168 * reg[default] content
169 * 2[0x00]: 0 | N14 | N13 | N12 | N11 | N10 | N9 | N8
170 * 3[0x00]: N7 | N6 | N5 | N4 | N3 | N2 | N1 | N0
171 * 4[0x80]: 1 | 0 | RFG | BA1 | BA0 | BG1 | BG0 | LEN
172 * 5[0x00]: P0 | C1 | C0 | R4 | R3 | R2 | R1 | R0
173 * 6[0xc0]: 1 | 1 | 0 | 0 | RSD | 0 | 0 | 0
174 * 7[0x20]: P1 | BF6 | BF5 | BF4 | BF3 | BF2 | BF1 | 0
175 * 8[0xdb]: 1 | 1 | 0 | 1 | 0 | CC | 1 | 1
176 * 9[0x30]: VSD | V2 | V1 | V0 | S3 | S2 | S1 | S0
177 * 10[0xe1]: 1 | 1 | 1 | 0 | 0 | LS2 | LS1 | LS0
178 * 11[0xf5]: WS | WH2 | WH1 | WH0 | WL2 | WL1 | WL0 | WRE
179 * 12[0xf0]: 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0
180 * 13[0x28]: PD | BR4 | BR3 | BR2 | BR1 | BR0 | CLR | TL
183 static int zl10036_set_frequency(struct zl10036_state *state, u32 frequency)
188 div = (frequency + _FR/2) / _FR;
189 state->frequency = div * _FR;
191 foffset = frequency - state->frequency;
193 buf[0] = (div >> 8) & 0x7f;
194 buf[1] = (div >> 0) & 0xff;
196 deb_info("%s: ftodo=%u fpriv=%u ferr=%d div=%u\n", __func__,
197 frequency, state->frequency, foffset, div);
199 return zl10036_write(state, buf, sizeof(buf));
202 static int zl10036_set_bandwidth(struct zl10036_state *state, u32 fbw)
204 /* fbw is measured in kHz */
208 0xc0, 0x00, /* 6/7: rsd=0 bf=0 */
211 0xf0, 0x00, /* 12/13: br=0xa clr=0 tl=0*/
213 u8 zl10036_rsd_off[] = { 0xc8 }; /* set RSD=1 */
215 /* ensure correct values */
221 #define _BR_MAXIMUM (_XTAL/575) /* _XTAL / 575kHz = 17 */
228 * f(bw)=34,6MHz f(xtal)=10.111MHz
229 * br = (10111/34600) * 63 * 1/K = 14;
231 br = ((_XTAL * 21 * 1000) / (fbw * 419));
234 /* ensure correct values */
237 if (br > _BR_MAXIMUM)
242 * bf = fbw/_XTAL * br * k - 1 */
244 bf = (fbw * br * 1257) / (_XTAL * 1000) - 1;
246 /* ensure correct values */
250 buf_bf[1] = (bf << 1) & 0x7e;
251 buf_br[1] = (br << 2) & 0x7c;
252 deb_info("%s: BW=%d br=%u bf=%u\n", __func__, fbw, br, bf);
254 if (br != state->br) {
255 ret = zl10036_write(state, buf_br, sizeof(buf_br));
260 if (bf != state->bf) {
261 ret = zl10036_write(state, buf_bf, sizeof(buf_bf));
265 /* time = br/(32* fxtal) */
266 /* minimal sleep time to be calculated
267 * maximum br is 63 -> max time = 2 /10 MHz = 2e-7 */
270 ret = zl10036_write(state, zl10036_rsd_off,
271 sizeof(zl10036_rsd_off));
282 static int zl10036_set_gain_params(struct zl10036_state *state,
289 rfg = 0; /* enable when using an lna */
294 buf[0] = 0x80 | ((rfg << 5) & 0x20)
295 | ((ba << 3) & 0x18) | ((bg << 1) & 0x06);
297 if (!state->config->rf_loop_enable)
301 buf[1] = _RDIV_REG | ((c << 5) & 0x60);
303 deb_info("%s: c=%u rfg=%u ba=%u bg=%u\n", __func__, c, rfg, ba, bg);
304 return zl10036_write(state, buf, sizeof(buf));
307 static int zl10036_set_params(struct dvb_frontend *fe,
308 struct dvb_frontend_parameters *params)
310 struct zl10036_state *state = fe->tuner_priv;
312 u32 frequency = params->frequency;
317 /* ensure correct values
318 * maybe redundant as core already checks this */
319 if ((frequency < fe->ops.info.frequency_min)
320 || (frequency > fe->ops.info.frequency_max))
324 * alpha = 1.35 for dvb-s
325 * fBW = (alpha*symbolrate)/(2*0.8)
326 * 1.35 / (2*0.8) = 27 / 32
328 fbw = (27 * params->u.qpsk.symbol_rate) / 32;
333 /* Add safe margin of 3MHz */
336 /* setting the charge pump - guessed values */
337 if (frequency < 950000)
339 else if (frequency < 1250000)
341 else if (frequency < 1750000)
343 else if (frequency < 2175000)
348 if (fe->ops.i2c_gate_ctrl)
349 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
351 ret = zl10036_set_gain_params(state, c);
355 ret = zl10036_set_frequency(state, params->frequency);
359 ret = zl10036_set_bandwidth(state, fbw);
363 /* wait for tuner lock - no idea if this is really needed */
364 for (i = 0; i < 20; i++) {
365 ret = zl10036_read_status_reg(state);
369 /* check Frequency & Phase Lock Bit */
377 if (fe->ops.i2c_gate_ctrl)
378 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
383 static int zl10036_get_frequency(struct dvb_frontend *fe, u32 *frequency)
385 struct zl10036_state *state = fe->tuner_priv;
387 *frequency = state->frequency;
392 static int zl10036_init_regs(struct zl10036_state *state)
397 /* could also be one block from reg 2 to 13 and additional 10/11 */
398 u8 zl10036_init_tab[][2] = {
399 { 0x04, 0x00 }, /* 2/3: div=0x400 - arbitrary value */
400 { 0x8b, _RDIV_REG }, /* 4/5: rfg=0 ba=1 bg=1 len=? */
401 /* p0=0 c=0 r=_RDIV_REG */
402 { 0xc0, 0x20 }, /* 6/7: rsd=0 bf=0x10 */
403 { 0xd3, 0x40 }, /* 8/9: from datasheet */
404 { 0xe3, 0x5b }, /* 10/11: lock window level */
405 { 0xf0, 0x28 }, /* 12/13: br=0xa clr=0 tl=0*/
406 { 0xe3, 0xf9 }, /* 10/11: unlock window level */
409 /* invalid values to trigger writing */
413 if (!state->config->rf_loop_enable)
414 zl10036_init_tab[1][2] |= 0x01;
416 deb_info("%s\n", __func__);
418 for (i = 0; i < ARRAY_SIZE(zl10036_init_tab); i++) {
419 ret = zl10036_write(state, zl10036_init_tab[i], 2);
427 static int zl10036_init(struct dvb_frontend *fe)
429 struct zl10036_state *state = fe->tuner_priv;
432 if (fe->ops.i2c_gate_ctrl)
433 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
435 ret = zl10036_read_status_reg(state);
439 /* Only init if Power-on-Reset bit is set? */
440 ret = zl10036_init_regs(state);
442 if (fe->ops.i2c_gate_ctrl)
443 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
448 static struct dvb_tuner_ops zl10036_tuner_ops = {
450 .name = "Zarlink ZL10036",
451 .frequency_min = 950000,
452 .frequency_max = 2175000
454 .init = zl10036_init,
455 .release = zl10036_release,
456 .sleep = zl10036_sleep,
457 .set_params = zl10036_set_params,
458 .get_frequency = zl10036_get_frequency,
461 struct dvb_frontend *zl10036_attach(struct dvb_frontend *fe,
462 const struct zl10036_config *config,
463 struct i2c_adapter *i2c)
465 struct zl10036_state *state = NULL;
468 if (NULL == config) {
469 printk(KERN_ERR "%s: no config specified", __func__);
473 state = kzalloc(sizeof(struct zl10036_state), GFP_KERNEL);
477 state->config = config;
480 if (fe->ops.i2c_gate_ctrl)
481 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
483 ret = zl10036_read_status_reg(state);
485 printk(KERN_ERR "%s: No zl10036 found\n", __func__);
489 ret = zl10036_init_regs(state);
491 printk(KERN_ERR "%s: tuner initialization failed\n",
496 if (fe->ops.i2c_gate_ctrl)
497 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
499 fe->tuner_priv = state;
501 memcpy(&fe->ops.tuner_ops, &zl10036_tuner_ops,
502 sizeof(struct dvb_tuner_ops));
503 printk(KERN_INFO "%s: tuner initialization (%s addr=0x%02x) ok\n",
504 __func__, fe->ops.tuner_ops.info.name, config->tuner_address);
512 EXPORT_SYMBOL(zl10036_attach);
514 module_param_named(debug, zl10036_debug, int, 0644);
515 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
516 MODULE_DESCRIPTION("DVB ZL10036 driver");
517 MODULE_AUTHOR("Tino Reichardt");
518 MODULE_AUTHOR("Matthias Schwarzott");
519 MODULE_LICENSE("GPL");