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Linux 3.12.39
[linux/fpc-iii.git] / drivers / media / dvb-frontends / itd1000.c
blobcadcae4cff89122dbf90cad2d02cfa9fa13854b4
1 /*
2 * Driver for the Integrant ITD1000 "Zero-IF Tuner IC for Direct Broadcast Satellite"
3 *
4 * Copyright (c) 2007-8 Patrick Boettcher <pb@linuxtv.org>
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/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/delay.h>
25 #include <linux/dvb/frontend.h>
26 #include <linux/i2c.h>
27 #include <linux/slab.h>
28
29 #include "dvb_frontend.h"
30
31 #include "itd1000.h"
32 #include "itd1000_priv.h"
33
34 /* Max transfer size done by I2C transfer functions */
35 #define MAX_XFER_SIZE 64
36
37 static int debug;
38 module_param(debug, int, 0644);
39 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
40
41 #define itd_dbg(args...) do { \
42 if (debug) { \
43 printk(KERN_DEBUG "ITD1000: " args);\
44 } \
45 } while (0)
46
47 #define itd_warn(args...) do { \
48 printk(KERN_WARNING "ITD1000: " args); \
49 } while (0)
50
51 #define itd_info(args...) do { \
52 printk(KERN_INFO "ITD1000: " args); \
53 } while (0)
54
55 /* don't write more than one byte with flexcop behind */
56 static int itd1000_write_regs(struct itd1000_state *state, u8 reg, u8 v[], u8 len)
57 {
58 u8 buf[MAX_XFER_SIZE];
59 struct i2c_msg msg = {
60 .addr = state->cfg->i2c_address, .flags = 0, .buf = buf, .len = len+1
61 };
62
63 if (1 + len > sizeof(buf)) {
64 printk(KERN_WARNING
65 "itd1000: i2c wr reg=%04x: len=%d is too big!\n",
66 reg, len);
67 return -EINVAL;
68 }
69
70 buf[0] = reg;
71 memcpy(&buf[1], v, len);
72
73 /* itd_dbg("wr %02x: %02x\n", reg, v[0]); */
74
75 if (i2c_transfer(state->i2c, &msg, 1) != 1) {
76 printk(KERN_WARNING "itd1000 I2C write failed\n");
77 return -EREMOTEIO;
78 }
79 return 0;
80 }
81
82 static int itd1000_read_reg(struct itd1000_state *state, u8 reg)
83 {
84 u8 val;
85 struct i2c_msg msg[2] = {
86 { .addr = state->cfg->i2c_address, .flags = 0, .buf = &reg, .len = 1 },
87 { .addr = state->cfg->i2c_address, .flags = I2C_M_RD, .buf = &val, .len = 1 },
88 };
89
90 /* ugly flexcop workaround */
91 itd1000_write_regs(state, (reg - 1) & 0xff, &state->shadow[(reg - 1) & 0xff], 1);
92
93 if (i2c_transfer(state->i2c, msg, 2) != 2) {
94 itd_warn("itd1000 I2C read failed\n");
95 return -EREMOTEIO;
96 }
97 return val;
98 }
99
100 static inline int itd1000_write_reg(struct itd1000_state *state, u8 r, u8 v)
101 {
102 int ret = itd1000_write_regs(state, r, &v, 1);
103 state->shadow[r] = v;
104 return ret;
105 }
106
107
108 static struct {
109 u32 symbol_rate;
110 u8 pgaext : 4; /* PLLFH */
111 u8 bbgvmin : 4; /* BBGVMIN */
112 } itd1000_lpf_pga[] = {
113 { 0, 0x8, 0x3 },
114 { 5200000, 0x8, 0x3 },
115 { 12200000, 0x4, 0x3 },
116 { 15400000, 0x2, 0x3 },
117 { 19800000, 0x2, 0x3 },
118 { 21500000, 0x2, 0x3 },
119 { 24500000, 0x2, 0x3 },
120 { 28400000, 0x2, 0x3 },
121 { 33400000, 0x2, 0x3 },
122 { 34400000, 0x1, 0x4 },
123 { 34400000, 0x1, 0x4 },
124 { 38400000, 0x1, 0x4 },
125 { 38400000, 0x1, 0x4 },
126 { 40400000, 0x1, 0x4 },
127 { 45400000, 0x1, 0x4 },
128 };
129
130 static void itd1000_set_lpf_bw(struct itd1000_state *state, u32 symbol_rate)
131 {
132 u8 i;
133 u8 con1 = itd1000_read_reg(state, CON1) & 0xfd;
134 u8 pllfh = itd1000_read_reg(state, PLLFH) & 0x0f;
135 u8 bbgvmin = itd1000_read_reg(state, BBGVMIN) & 0xf0;
136 u8 bw = itd1000_read_reg(state, BW) & 0xf0;
137
138 itd_dbg("symbol_rate = %d\n", symbol_rate);
139
140 /* not sure what is that ? - starting to download the table */
141 itd1000_write_reg(state, CON1, con1 | (1 << 1));
142
143 for (i = 0; i < ARRAY_SIZE(itd1000_lpf_pga); i++)
144 if (symbol_rate < itd1000_lpf_pga[i].symbol_rate) {
145 itd_dbg("symrate: index: %d pgaext: %x, bbgvmin: %x\n", i, itd1000_lpf_pga[i].pgaext, itd1000_lpf_pga[i].bbgvmin);
146 itd1000_write_reg(state, PLLFH, pllfh | (itd1000_lpf_pga[i].pgaext << 4));
147 itd1000_write_reg(state, BBGVMIN, bbgvmin | (itd1000_lpf_pga[i].bbgvmin));
148 itd1000_write_reg(state, BW, bw | (i & 0x0f));
149 break;
150 }
151
152 itd1000_write_reg(state, CON1, con1 | (0 << 1));
153 }
154
155 static struct {
156 u8 vcorg;
157 u32 fmax_rg;
158 } itd1000_vcorg[] = {
159 { 1, 920000 },
160 { 2, 971000 },
161 { 3, 1031000 },
162 { 4, 1091000 },
163 { 5, 1171000 },
164 { 6, 1281000 },
165 { 7, 1381000 },
166 { 8, 500000 }, /* this is intentional. */
167 { 9, 1451000 },
168 { 10, 1531000 },
169 { 11, 1631000 },
170 { 12, 1741000 },
171 { 13, 1891000 },
172 { 14, 2071000 },
173 { 15, 2250000 },
174 };
175
176 static void itd1000_set_vco(struct itd1000_state *state, u32 freq_khz)
177 {
178 u8 i;
179 u8 gvbb_i2c = itd1000_read_reg(state, GVBB_I2C) & 0xbf;
180 u8 vco_chp1_i2c = itd1000_read_reg(state, VCO_CHP1_I2C) & 0x0f;
181 u8 adcout;
182
183 /* reserved bit again (reset ?) */
184 itd1000_write_reg(state, GVBB_I2C, gvbb_i2c | (1 << 6));
185
186 for (i = 0; i < ARRAY_SIZE(itd1000_vcorg); i++) {
187 if (freq_khz < itd1000_vcorg[i].fmax_rg) {
188 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | (itd1000_vcorg[i].vcorg << 4));
189 msleep(1);
190
191 adcout = itd1000_read_reg(state, PLLLOCK) & 0x0f;
192
193 itd_dbg("VCO: %dkHz: %d -> ADCOUT: %d %02x\n", freq_khz, itd1000_vcorg[i].vcorg, adcout, vco_chp1_i2c);
194
195 if (adcout > 13) {
196 if (!(itd1000_vcorg[i].vcorg == 7 || itd1000_vcorg[i].vcorg == 15))
197 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg + 1) << 4));
198 } else if (adcout < 2) {
199 if (!(itd1000_vcorg[i].vcorg == 1 || itd1000_vcorg[i].vcorg == 9))
200 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg - 1) << 4));
201 }
202 break;
203 }
204 }
205 }
206
207 static const struct {
208 u32 freq;
209 u8 values[10]; /* RFTR, RFST1 - RFST9 */
210 } itd1000_fre_values[] = {
211 { 1075000, { 0x59, 0x1d, 0x1c, 0x17, 0x16, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
212 { 1250000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
213 { 1450000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
214 { 1650000, { 0x69, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
215 { 1750000, { 0x69, 0x1e, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
216 { 1850000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } },
217 { 1900000, { 0x69, 0x1d, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } },
218 { 1950000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0d, 0x0b, 0x0a } },
219 { 2050000, { 0x69, 0x1e, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0b, 0x0a } },
220 { 2150000, { 0x69, 0x1d, 0x1c, 0x17, 0x15, 0x14, 0x13, 0x0f, 0x0e, 0x0b } }
221 };
222
223
224 #define FREF 16
225
226 static void itd1000_set_lo(struct itd1000_state *state, u32 freq_khz)
227 {
228 int i, j;
229 u32 plln, pllf;
230 u64 tmp;
231
232 plln = (freq_khz * 1000) / 2 / FREF;
233
234 /* Compute the factional part times 1000 */
235 tmp = plln % 1000000;
236 plln /= 1000000;
237
238 tmp *= 1048576;
239 do_div(tmp, 1000000);
240 pllf = (u32) tmp;
241
242 state->frequency = ((plln * 1000) + (pllf * 1000)/1048576) * 2*FREF;
243 itd_dbg("frequency: %dkHz (wanted) %dkHz (set), PLLF = %d, PLLN = %d\n", freq_khz, state->frequency, pllf, plln);
244
245 itd1000_write_reg(state, PLLNH, 0x80); /* PLLNH */
246 itd1000_write_reg(state, PLLNL, plln & 0xff);
247 itd1000_write_reg(state, PLLFH, (itd1000_read_reg(state, PLLFH) & 0xf0) | ((pllf >> 16) & 0x0f));
248 itd1000_write_reg(state, PLLFM, (pllf >> 8) & 0xff);
249 itd1000_write_reg(state, PLLFL, (pllf >> 0) & 0xff);
250
251 for (i = 0; i < ARRAY_SIZE(itd1000_fre_values); i++) {
252 if (freq_khz <= itd1000_fre_values[i].freq) {
253 itd_dbg("fre_values: %d\n", i);
254 itd1000_write_reg(state, RFTR, itd1000_fre_values[i].values[0]);
255 for (j = 0; j < 9; j++)
256 itd1000_write_reg(state, RFST1+j, itd1000_fre_values[i].values[j+1]);
257 break;
258 }
259 }
260
261 itd1000_set_vco(state, freq_khz);
262 }
263
264 static int itd1000_set_parameters(struct dvb_frontend *fe)
265 {
266 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
267 struct itd1000_state *state = fe->tuner_priv;
268 u8 pllcon1;
269
270 itd1000_set_lo(state, c->frequency);
271 itd1000_set_lpf_bw(state, c->symbol_rate);
272
273 pllcon1 = itd1000_read_reg(state, PLLCON1) & 0x7f;
274 itd1000_write_reg(state, PLLCON1, pllcon1 | (1 << 7));
275 itd1000_write_reg(state, PLLCON1, pllcon1);
276
277 return 0;
278 }
279
280 static int itd1000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
281 {
282 struct itd1000_state *state = fe->tuner_priv;
283 *frequency = state->frequency;
284 return 0;
285 }
286
287 static int itd1000_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
288 {
289 return 0;
290 }
291
292 static u8 itd1000_init_tab[][2] = {
293 { PLLCON1, 0x65 }, /* Register does not change */
294 { PLLNH, 0x80 }, /* Bits [7:6] do not change */
295 { RESERVED_0X6D, 0x3b },
296 { VCO_CHP2_I2C, 0x12 },
297 { 0x72, 0xf9 }, /* No such regsister defined */
298 { RESERVED_0X73, 0xff },
299 { RESERVED_0X74, 0xb2 },
300 { RESERVED_0X75, 0xc7 },
301 { EXTGVBBRF, 0xf0 },
302 { DIVAGCCK, 0x80 },
303 { BBTR, 0xa0 },
304 { RESERVED_0X7E, 0x4f },
305 { 0x82, 0x88 }, /* No such regsister defined */
306 { 0x83, 0x80 }, /* No such regsister defined */
307 { 0x84, 0x80 }, /* No such regsister defined */
308 { RESERVED_0X85, 0x74 },
309 { RESERVED_0X86, 0xff },
310 { RESERVED_0X88, 0x02 },
311 { RESERVED_0X89, 0x16 },
312 { RFST0, 0x1f },
313 { RESERVED_0X94, 0x66 },
314 { RESERVED_0X95, 0x66 },
315 { RESERVED_0X96, 0x77 },
316 { RESERVED_0X97, 0x99 },
317 { RESERVED_0X98, 0xff },
318 { RESERVED_0X99, 0xfc },
319 { RESERVED_0X9A, 0xba },
320 { RESERVED_0X9B, 0xaa },
321 };
322
323 static u8 itd1000_reinit_tab[][2] = {
324 { VCO_CHP1_I2C, 0x8a },
325 { BW, 0x87 },
326 { GVBB_I2C, 0x03 },
327 { BBGVMIN, 0x03 },
328 { CON1, 0x2e },
329 };
330
331
332 static int itd1000_init(struct dvb_frontend *fe)
333 {
334 struct itd1000_state *state = fe->tuner_priv;
335 int i;
336
337 for (i = 0; i < ARRAY_SIZE(itd1000_init_tab); i++)
338 itd1000_write_reg(state, itd1000_init_tab[i][0], itd1000_init_tab[i][1]);
339
340 for (i = 0; i < ARRAY_SIZE(itd1000_reinit_tab); i++)
341 itd1000_write_reg(state, itd1000_reinit_tab[i][0], itd1000_reinit_tab[i][1]);
342
343 return 0;
344 }
345
346 static int itd1000_sleep(struct dvb_frontend *fe)
347 {
348 return 0;
349 }
350
351 static int itd1000_release(struct dvb_frontend *fe)
352 {
353 kfree(fe->tuner_priv);
354 fe->tuner_priv = NULL;
355 return 0;
356 }
357
358 static const struct dvb_tuner_ops itd1000_tuner_ops = {
359 .info = {
360 .name = "Integrant ITD1000",
361 .frequency_min = 950000,
362 .frequency_max = 2150000,
363 .frequency_step = 125, /* kHz for QPSK frontends */
364 },
365
366 .release = itd1000_release,
367
368 .init = itd1000_init,
369 .sleep = itd1000_sleep,
370
371 .set_params = itd1000_set_parameters,
372 .get_frequency = itd1000_get_frequency,
373 .get_bandwidth = itd1000_get_bandwidth
374 };
375
376
377 struct dvb_frontend *itd1000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct itd1000_config *cfg)
378 {
379 struct itd1000_state *state = NULL;
380 u8 i = 0;
381
382 state = kzalloc(sizeof(struct itd1000_state), GFP_KERNEL);
383 if (state == NULL)
384 return NULL;
385
386 state->cfg = cfg;
387 state->i2c = i2c;
388
389 i = itd1000_read_reg(state, 0);
390 if (i != 0) {
391 kfree(state);
392 return NULL;
393 }
394 itd_info("successfully identified (ID: %d)\n", i);
395
396 memset(state->shadow, 0xff, sizeof(state->shadow));
397 for (i = 0x65; i < 0x9c; i++)
398 state->shadow[i] = itd1000_read_reg(state, i);
399
400 memcpy(&fe->ops.tuner_ops, &itd1000_tuner_ops, sizeof(struct dvb_tuner_ops));
401
402 fe->tuner_priv = state;
403
404 return fe;
405 }
406 EXPORT_SYMBOL(itd1000_attach);
407
408 MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>");
409 MODULE_DESCRIPTION("Integrant ITD1000 driver");
410 MODULE_LICENSE("GPL");
Linux with added FPC-III support