1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Rafael Micro R820T driver |
3 | // |
4 | // Copyright (C) 2013 Mauro Carvalho Chehab |
5 | // |
6 | // This driver was written from scratch, based on an existing driver |
7 | // that it is part of rtl-sdr git tree, released under GPLv2: |
8 | // https://groups.google.com/forum/#!topic/ultra-cheap-sdr/Y3rBEOFtHug |
9 | // https://github.com/n1gp/gr-baz |
10 | // |
11 | // From what I understood from the threads, the original driver was converted |
12 | // to userspace from a Realtek tree. I couldn't find the original tree. |
13 | // However, the original driver look awkward on my eyes. So, I decided to |
14 | // write a new version from it from the scratch, while trying to reproduce |
15 | // everything found there. |
16 | // |
17 | // TODO: |
18 | // After locking, the original driver seems to have some routines to |
19 | // improve reception. This was not implemented here yet. |
20 | // |
21 | // RF Gain set/get is not implemented. |
22 | |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | |
25 | #include <linux/videodev2.h> |
26 | #include <linux/mutex.h> |
27 | #include <linux/slab.h> |
28 | #include <linux/bitrev.h> |
29 | |
30 | #include "tuner-i2c.h" |
31 | #include "r820t.h" |
32 | |
33 | /* |
34 | * FIXME: I think that there are only 32 registers, but better safe than |
35 | * sorry. After finishing the driver, we may review it. |
36 | */ |
37 | #define REG_SHADOW_START 5 |
38 | #define NUM_REGS 27 |
39 | #define NUM_IMR 5 |
40 | #define IMR_TRIAL 9 |
41 | |
42 | #define VER_NUM 49 |
43 | |
44 | static int debug; |
45 | module_param(debug, int, 0644); |
46 | MODULE_PARM_DESC(debug, "enable verbose debug messages" ); |
47 | |
48 | static int no_imr_cal; |
49 | module_param(no_imr_cal, int, 0444); |
50 | MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init" ); |
51 | |
52 | |
53 | /* |
54 | * enums and structures |
55 | */ |
56 | |
57 | enum xtal_cap_value { |
58 | XTAL_LOW_CAP_30P = 0, |
59 | XTAL_LOW_CAP_20P, |
60 | XTAL_LOW_CAP_10P, |
61 | XTAL_LOW_CAP_0P, |
62 | XTAL_HIGH_CAP_0P |
63 | }; |
64 | |
65 | struct r820t_sect_type { |
66 | u8 phase_y; |
67 | u8 gain_x; |
68 | u16 value; |
69 | }; |
70 | |
71 | struct r820t_priv { |
72 | struct list_head hybrid_tuner_instance_list; |
73 | const struct r820t_config *cfg; |
74 | struct tuner_i2c_props i2c_props; |
75 | struct mutex lock; |
76 | |
77 | u8 regs[NUM_REGS]; |
78 | u8 buf[NUM_REGS + 1]; |
79 | enum xtal_cap_value xtal_cap_sel; |
80 | u16 pll; /* kHz */ |
81 | u32 int_freq; |
82 | u8 fil_cal_code; |
83 | bool imr_done; |
84 | bool has_lock; |
85 | bool init_done; |
86 | struct r820t_sect_type imr_data[NUM_IMR]; |
87 | |
88 | /* Store current mode */ |
89 | u32 delsys; |
90 | enum v4l2_tuner_type type; |
91 | v4l2_std_id std; |
92 | u32 bw; /* in MHz */ |
93 | }; |
94 | |
95 | struct r820t_freq_range { |
96 | u32 freq; |
97 | u8 open_d; |
98 | u8 rf_mux_ploy; |
99 | u8 tf_c; |
100 | u8 xtal_cap20p; |
101 | u8 xtal_cap10p; |
102 | u8 xtal_cap0p; |
103 | u8 imr_mem; /* Not used, currently */ |
104 | }; |
105 | |
106 | #define VCO_POWER_REF 0x02 |
107 | #define DIP_FREQ 32000000 |
108 | |
109 | /* |
110 | * Static constants |
111 | */ |
112 | |
113 | static LIST_HEAD(hybrid_tuner_instance_list); |
114 | static DEFINE_MUTEX(r820t_list_mutex); |
115 | |
116 | /* Those initial values start from REG_SHADOW_START */ |
117 | static const u8 r820t_init_array[NUM_REGS] = { |
118 | 0x83, 0x32, 0x75, /* 05 to 07 */ |
119 | 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */ |
120 | 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */ |
121 | 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */ |
122 | 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */ |
123 | 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */ |
124 | 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */ |
125 | }; |
126 | |
127 | /* Tuner frequency ranges */ |
128 | static const struct r820t_freq_range freq_ranges[] = { |
129 | { |
130 | .freq = 0, |
131 | .open_d = 0x08, /* low */ |
132 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
133 | .tf_c = 0xdf, /* R27[7:0] band2,band0 */ |
134 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
135 | .xtal_cap10p = 0x01, |
136 | .xtal_cap0p = 0x00, |
137 | .imr_mem = 0, |
138 | }, { |
139 | .freq = 50, /* Start freq, in MHz */ |
140 | .open_d = 0x08, /* low */ |
141 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
142 | .tf_c = 0xbe, /* R27[7:0] band4,band1 */ |
143 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
144 | .xtal_cap10p = 0x01, |
145 | .xtal_cap0p = 0x00, |
146 | .imr_mem = 0, |
147 | }, { |
148 | .freq = 55, /* Start freq, in MHz */ |
149 | .open_d = 0x08, /* low */ |
150 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
151 | .tf_c = 0x8b, /* R27[7:0] band7,band4 */ |
152 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
153 | .xtal_cap10p = 0x01, |
154 | .xtal_cap0p = 0x00, |
155 | .imr_mem = 0, |
156 | }, { |
157 | .freq = 60, /* Start freq, in MHz */ |
158 | .open_d = 0x08, /* low */ |
159 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
160 | .tf_c = 0x7b, /* R27[7:0] band8,band4 */ |
161 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
162 | .xtal_cap10p = 0x01, |
163 | .xtal_cap0p = 0x00, |
164 | .imr_mem = 0, |
165 | }, { |
166 | .freq = 65, /* Start freq, in MHz */ |
167 | .open_d = 0x08, /* low */ |
168 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
169 | .tf_c = 0x69, /* R27[7:0] band9,band6 */ |
170 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
171 | .xtal_cap10p = 0x01, |
172 | .xtal_cap0p = 0x00, |
173 | .imr_mem = 0, |
174 | }, { |
175 | .freq = 70, /* Start freq, in MHz */ |
176 | .open_d = 0x08, /* low */ |
177 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
178 | .tf_c = 0x58, /* R27[7:0] band10,band7 */ |
179 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
180 | .xtal_cap10p = 0x01, |
181 | .xtal_cap0p = 0x00, |
182 | .imr_mem = 0, |
183 | }, { |
184 | .freq = 75, /* Start freq, in MHz */ |
185 | .open_d = 0x00, /* high */ |
186 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
187 | .tf_c = 0x44, /* R27[7:0] band11,band11 */ |
188 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
189 | .xtal_cap10p = 0x01, |
190 | .xtal_cap0p = 0x00, |
191 | .imr_mem = 0, |
192 | }, { |
193 | .freq = 80, /* Start freq, in MHz */ |
194 | .open_d = 0x00, /* high */ |
195 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
196 | .tf_c = 0x44, /* R27[7:0] band11,band11 */ |
197 | .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ |
198 | .xtal_cap10p = 0x01, |
199 | .xtal_cap0p = 0x00, |
200 | .imr_mem = 0, |
201 | }, { |
202 | .freq = 90, /* Start freq, in MHz */ |
203 | .open_d = 0x00, /* high */ |
204 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
205 | .tf_c = 0x34, /* R27[7:0] band12,band11 */ |
206 | .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ |
207 | .xtal_cap10p = 0x01, |
208 | .xtal_cap0p = 0x00, |
209 | .imr_mem = 0, |
210 | }, { |
211 | .freq = 100, /* Start freq, in MHz */ |
212 | .open_d = 0x00, /* high */ |
213 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
214 | .tf_c = 0x34, /* R27[7:0] band12,band11 */ |
215 | .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ |
216 | .xtal_cap10p = 0x01, |
217 | .xtal_cap0p = 0x00, |
218 | .imr_mem = 0, |
219 | }, { |
220 | .freq = 110, /* Start freq, in MHz */ |
221 | .open_d = 0x00, /* high */ |
222 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
223 | .tf_c = 0x24, /* R27[7:0] band13,band11 */ |
224 | .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ |
225 | .xtal_cap10p = 0x01, |
226 | .xtal_cap0p = 0x00, |
227 | .imr_mem = 1, |
228 | }, { |
229 | .freq = 120, /* Start freq, in MHz */ |
230 | .open_d = 0x00, /* high */ |
231 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
232 | .tf_c = 0x24, /* R27[7:0] band13,band11 */ |
233 | .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ |
234 | .xtal_cap10p = 0x01, |
235 | .xtal_cap0p = 0x00, |
236 | .imr_mem = 1, |
237 | }, { |
238 | .freq = 140, /* Start freq, in MHz */ |
239 | .open_d = 0x00, /* high */ |
240 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
241 | .tf_c = 0x14, /* R27[7:0] band14,band11 */ |
242 | .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ |
243 | .xtal_cap10p = 0x01, |
244 | .xtal_cap0p = 0x00, |
245 | .imr_mem = 1, |
246 | }, { |
247 | .freq = 180, /* Start freq, in MHz */ |
248 | .open_d = 0x00, /* high */ |
249 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
250 | .tf_c = 0x13, /* R27[7:0] band14,band12 */ |
251 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
252 | .xtal_cap10p = 0x00, |
253 | .xtal_cap0p = 0x00, |
254 | .imr_mem = 1, |
255 | }, { |
256 | .freq = 220, /* Start freq, in MHz */ |
257 | .open_d = 0x00, /* high */ |
258 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
259 | .tf_c = 0x13, /* R27[7:0] band14,band12 */ |
260 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
261 | .xtal_cap10p = 0x00, |
262 | .xtal_cap0p = 0x00, |
263 | .imr_mem = 2, |
264 | }, { |
265 | .freq = 250, /* Start freq, in MHz */ |
266 | .open_d = 0x00, /* high */ |
267 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
268 | .tf_c = 0x11, /* R27[7:0] highest,highest */ |
269 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
270 | .xtal_cap10p = 0x00, |
271 | .xtal_cap0p = 0x00, |
272 | .imr_mem = 2, |
273 | }, { |
274 | .freq = 280, /* Start freq, in MHz */ |
275 | .open_d = 0x00, /* high */ |
276 | .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ |
277 | .tf_c = 0x00, /* R27[7:0] highest,highest */ |
278 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
279 | .xtal_cap10p = 0x00, |
280 | .xtal_cap0p = 0x00, |
281 | .imr_mem = 2, |
282 | }, { |
283 | .freq = 310, /* Start freq, in MHz */ |
284 | .open_d = 0x00, /* high */ |
285 | .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */ |
286 | .tf_c = 0x00, /* R27[7:0] highest,highest */ |
287 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
288 | .xtal_cap10p = 0x00, |
289 | .xtal_cap0p = 0x00, |
290 | .imr_mem = 2, |
291 | }, { |
292 | .freq = 450, /* Start freq, in MHz */ |
293 | .open_d = 0x00, /* high */ |
294 | .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */ |
295 | .tf_c = 0x00, /* R27[7:0] highest,highest */ |
296 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
297 | .xtal_cap10p = 0x00, |
298 | .xtal_cap0p = 0x00, |
299 | .imr_mem = 3, |
300 | }, { |
301 | .freq = 588, /* Start freq, in MHz */ |
302 | .open_d = 0x00, /* high */ |
303 | .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */ |
304 | .tf_c = 0x00, /* R27[7:0] highest,highest */ |
305 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
306 | .xtal_cap10p = 0x00, |
307 | .xtal_cap0p = 0x00, |
308 | .imr_mem = 3, |
309 | }, { |
310 | .freq = 650, /* Start freq, in MHz */ |
311 | .open_d = 0x00, /* high */ |
312 | .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */ |
313 | .tf_c = 0x00, /* R27[7:0] highest,highest */ |
314 | .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ |
315 | .xtal_cap10p = 0x00, |
316 | .xtal_cap0p = 0x00, |
317 | .imr_mem = 4, |
318 | } |
319 | }; |
320 | |
321 | static int r820t_xtal_capacitor[][2] = { |
322 | { 0x0b, XTAL_LOW_CAP_30P }, |
323 | { 0x02, XTAL_LOW_CAP_20P }, |
324 | { 0x01, XTAL_LOW_CAP_10P }, |
325 | { 0x00, XTAL_LOW_CAP_0P }, |
326 | { 0x10, XTAL_HIGH_CAP_0P }, |
327 | }; |
328 | |
329 | /* |
330 | * I2C read/write code and shadow registers logic |
331 | */ |
332 | static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val, |
333 | int len) |
334 | { |
335 | int r = reg - REG_SHADOW_START; |
336 | |
337 | if (r < 0) { |
338 | len += r; |
339 | r = 0; |
340 | } |
341 | if (len <= 0) |
342 | return; |
343 | if (len > NUM_REGS - r) |
344 | len = NUM_REGS - r; |
345 | |
346 | tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n" , |
347 | __func__, r + REG_SHADOW_START, len, len, val); |
348 | |
349 | memcpy(&priv->regs[r], val, len); |
350 | } |
351 | |
352 | static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val, |
353 | int len) |
354 | { |
355 | int rc, size, pos = 0; |
356 | |
357 | /* Store the shadow registers */ |
358 | shadow_store(priv, reg, val, len); |
359 | |
360 | do { |
361 | if (len > priv->cfg->max_i2c_msg_len - 1) |
362 | size = priv->cfg->max_i2c_msg_len - 1; |
363 | else |
364 | size = len; |
365 | |
366 | /* Fill I2C buffer */ |
367 | priv->buf[0] = reg; |
368 | memcpy(&priv->buf[1], &val[pos], size); |
369 | |
370 | rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1); |
371 | if (rc != size + 1) { |
372 | tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n" , |
373 | __func__, rc, reg, size, size, &priv->buf[1]); |
374 | if (rc < 0) |
375 | return rc; |
376 | return -EREMOTEIO; |
377 | } |
378 | tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n" , |
379 | __func__, reg, size, size, &priv->buf[1]); |
380 | |
381 | reg += size; |
382 | len -= size; |
383 | pos += size; |
384 | } while (len > 0); |
385 | |
386 | return 0; |
387 | } |
388 | |
389 | static inline int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val) |
390 | { |
391 | u8 tmp = val; /* work around GCC PR81715 with asan-stack=1 */ |
392 | |
393 | return r820t_write(priv, reg, &tmp, 1); |
394 | } |
395 | |
396 | static int r820t_read_cache_reg(struct r820t_priv *priv, int reg) |
397 | { |
398 | reg -= REG_SHADOW_START; |
399 | |
400 | if (reg >= 0 && reg < NUM_REGS) |
401 | return priv->regs[reg]; |
402 | else |
403 | return -EINVAL; |
404 | } |
405 | |
406 | static inline int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val, |
407 | u8 bit_mask) |
408 | { |
409 | u8 tmp = val; |
410 | int rc = r820t_read_cache_reg(priv, reg); |
411 | |
412 | if (rc < 0) |
413 | return rc; |
414 | |
415 | tmp = (rc & ~bit_mask) | (tmp & bit_mask); |
416 | |
417 | return r820t_write(priv, reg, &tmp, 1); |
418 | } |
419 | |
420 | static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len) |
421 | { |
422 | int rc, i; |
423 | u8 *p = &priv->buf[1]; |
424 | |
425 | priv->buf[0] = reg; |
426 | |
427 | rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len); |
428 | if (rc != len) { |
429 | tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n" , |
430 | __func__, rc, reg, len, len, p); |
431 | if (rc < 0) |
432 | return rc; |
433 | return -EREMOTEIO; |
434 | } |
435 | |
436 | /* Copy data to the output buffer */ |
437 | for (i = 0; i < len; i++) |
438 | val[i] = bitrev8(p[i]); |
439 | |
440 | tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n" , |
441 | __func__, reg, len, len, val); |
442 | |
443 | return 0; |
444 | } |
445 | |
446 | /* |
447 | * r820t tuning logic |
448 | */ |
449 | |
450 | static int r820t_set_mux(struct r820t_priv *priv, u32 freq) |
451 | { |
452 | const struct r820t_freq_range *range; |
453 | int i, rc; |
454 | u8 val, reg08, reg09; |
455 | |
456 | /* Get the proper frequency range */ |
457 | freq = freq / 1000000; |
458 | for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) { |
459 | if (freq < freq_ranges[i + 1].freq) |
460 | break; |
461 | } |
462 | range = &freq_ranges[i]; |
463 | |
464 | tuner_dbg("set r820t range#%d for frequency %d MHz\n" , i, freq); |
465 | |
466 | /* Open Drain */ |
467 | rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08); |
468 | if (rc < 0) |
469 | return rc; |
470 | |
471 | /* RF_MUX,Polymux */ |
472 | rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3); |
473 | if (rc < 0) |
474 | return rc; |
475 | |
476 | /* TF BAND */ |
477 | rc = r820t_write_reg(priv, 0x1b, range->tf_c); |
478 | if (rc < 0) |
479 | return rc; |
480 | |
481 | /* XTAL CAP & Drive */ |
482 | switch (priv->xtal_cap_sel) { |
483 | case XTAL_LOW_CAP_30P: |
484 | case XTAL_LOW_CAP_20P: |
485 | val = range->xtal_cap20p | 0x08; |
486 | break; |
487 | case XTAL_LOW_CAP_10P: |
488 | val = range->xtal_cap10p | 0x08; |
489 | break; |
490 | case XTAL_HIGH_CAP_0P: |
491 | val = range->xtal_cap0p | 0x00; |
492 | break; |
493 | default: |
494 | case XTAL_LOW_CAP_0P: |
495 | val = range->xtal_cap0p | 0x08; |
496 | break; |
497 | } |
498 | rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b); |
499 | if (rc < 0) |
500 | return rc; |
501 | |
502 | if (priv->imr_done) { |
503 | reg08 = priv->imr_data[range->imr_mem].gain_x; |
504 | reg09 = priv->imr_data[range->imr_mem].phase_y; |
505 | } else { |
506 | reg08 = 0; |
507 | reg09 = 0; |
508 | } |
509 | rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f); |
510 | if (rc < 0) |
511 | return rc; |
512 | |
513 | rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f); |
514 | |
515 | return rc; |
516 | } |
517 | |
518 | static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, |
519 | u32 freq) |
520 | { |
521 | u32 vco_freq; |
522 | int rc, i; |
523 | unsigned sleep_time = 10000; |
524 | u32 vco_fra; /* VCO contribution by SDM (kHz) */ |
525 | u32 vco_min = 1770000; |
526 | u32 vco_max = vco_min * 2; |
527 | u32 pll_ref; |
528 | u16 n_sdm = 2; |
529 | u16 sdm = 0; |
530 | u8 mix_div = 2; |
531 | u8 div_buf = 0; |
532 | u8 div_num = 0; |
533 | u8 refdiv2 = 0; |
534 | u8 ni, si, nint, vco_fine_tune, val; |
535 | u8 data[5]; |
536 | |
537 | /* Frequency in kHz */ |
538 | freq = freq / 1000; |
539 | pll_ref = priv->cfg->xtal / 1000; |
540 | |
541 | #if 0 |
542 | /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */ |
543 | if ((priv->cfg->rafael_chip == CHIP_R620D) || |
544 | (priv->cfg->rafael_chip == CHIP_R828D) || |
545 | (priv->cfg->rafael_chip == CHIP_R828)) { |
546 | /* ref set refdiv2, reffreq = Xtal/2 on ATV application */ |
547 | if (type != V4L2_TUNER_DIGITAL_TV) { |
548 | pll_ref /= 2; |
549 | refdiv2 = 0x10; |
550 | sleep_time = 20000; |
551 | } |
552 | } else { |
553 | if (priv->cfg->xtal > 24000000) { |
554 | pll_ref /= 2; |
555 | refdiv2 = 0x10; |
556 | } |
557 | } |
558 | #endif |
559 | |
560 | rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10); |
561 | if (rc < 0) |
562 | return rc; |
563 | |
564 | /* set pll autotune = 128kHz */ |
565 | rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c); |
566 | if (rc < 0) |
567 | return rc; |
568 | |
569 | /* set VCO current = 100 */ |
570 | rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0); |
571 | if (rc < 0) |
572 | return rc; |
573 | |
574 | /* Calculate divider */ |
575 | while (mix_div <= 64) { |
576 | if (((freq * mix_div) >= vco_min) && |
577 | ((freq * mix_div) < vco_max)) { |
578 | div_buf = mix_div; |
579 | while (div_buf > 2) { |
580 | div_buf = div_buf >> 1; |
581 | div_num++; |
582 | } |
583 | break; |
584 | } |
585 | mix_div = mix_div << 1; |
586 | } |
587 | |
588 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
589 | if (rc < 0) |
590 | return rc; |
591 | |
592 | vco_fine_tune = (data[4] & 0x30) >> 4; |
593 | |
594 | tuner_dbg("mix_div=%d div_num=%d vco_fine_tune=%d\n" , |
595 | mix_div, div_num, vco_fine_tune); |
596 | |
597 | /* |
598 | * XXX: R828D/16MHz seems to have always vco_fine_tune=1. |
599 | * Due to that, this calculation goes wrong. |
600 | */ |
601 | if (priv->cfg->rafael_chip != CHIP_R828D) { |
602 | if (vco_fine_tune > VCO_POWER_REF) |
603 | div_num = div_num - 1; |
604 | else if (vco_fine_tune < VCO_POWER_REF) |
605 | div_num = div_num + 1; |
606 | } |
607 | |
608 | rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0); |
609 | if (rc < 0) |
610 | return rc; |
611 | |
612 | vco_freq = freq * mix_div; |
613 | nint = vco_freq / (2 * pll_ref); |
614 | vco_fra = vco_freq - 2 * pll_ref * nint; |
615 | |
616 | /* boundary spur prevention */ |
617 | if (vco_fra < pll_ref / 64) { |
618 | vco_fra = 0; |
619 | } else if (vco_fra > pll_ref * 127 / 64) { |
620 | vco_fra = 0; |
621 | nint++; |
622 | } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) { |
623 | vco_fra = pll_ref * 127 / 128; |
624 | } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) { |
625 | vco_fra = pll_ref * 129 / 128; |
626 | } |
627 | |
628 | ni = (nint - 13) / 4; |
629 | si = nint - 4 * ni - 13; |
630 | |
631 | rc = r820t_write_reg(priv, 0x14, ni + (si << 6)); |
632 | if (rc < 0) |
633 | return rc; |
634 | |
635 | /* pw_sdm */ |
636 | if (!vco_fra) |
637 | val = 0x08; |
638 | else |
639 | val = 0x00; |
640 | |
641 | rc = r820t_write_reg_mask(priv, 0x12, val, 0x08); |
642 | if (rc < 0) |
643 | return rc; |
644 | |
645 | /* sdm calculator */ |
646 | while (vco_fra > 1) { |
647 | if (vco_fra > (2 * pll_ref / n_sdm)) { |
648 | sdm = sdm + 32768 / (n_sdm / 2); |
649 | vco_fra = vco_fra - 2 * pll_ref / n_sdm; |
650 | if (n_sdm >= 0x8000) |
651 | break; |
652 | } |
653 | n_sdm = n_sdm << 1; |
654 | } |
655 | |
656 | tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n" , |
657 | freq, pll_ref, refdiv2 ? " / 2" : "" , sdm); |
658 | |
659 | rc = r820t_write_reg(priv, 0x16, sdm >> 8); |
660 | if (rc < 0) |
661 | return rc; |
662 | rc = r820t_write_reg(priv, 0x15, sdm & 0xff); |
663 | if (rc < 0) |
664 | return rc; |
665 | |
666 | for (i = 0; i < 2; i++) { |
667 | usleep_range(sleep_time, sleep_time + 1000); |
668 | |
669 | /* Check if PLL has locked */ |
670 | rc = r820t_read(priv, 0x00, data, 3); |
671 | if (rc < 0) |
672 | return rc; |
673 | if (data[2] & 0x40) |
674 | break; |
675 | |
676 | if (!i) { |
677 | /* Didn't lock. Increase VCO current */ |
678 | rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0); |
679 | if (rc < 0) |
680 | return rc; |
681 | } |
682 | } |
683 | |
684 | if (!(data[2] & 0x40)) { |
685 | priv->has_lock = false; |
686 | return 0; |
687 | } |
688 | |
689 | priv->has_lock = true; |
690 | tuner_dbg("tuner has lock at frequency %d kHz\n" , freq); |
691 | |
692 | /* set pll autotune = 8kHz */ |
693 | rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08); |
694 | |
695 | return rc; |
696 | } |
697 | |
698 | static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq, |
699 | enum v4l2_tuner_type type, |
700 | v4l2_std_id std, |
701 | u32 delsys) |
702 | { |
703 | int rc; |
704 | u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l; |
705 | u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur; |
706 | |
707 | tuner_dbg("adjusting tuner parameters for the standard\n" ); |
708 | |
709 | switch (delsys) { |
710 | case SYS_DVBT: |
711 | if ((freq == 506000000) || (freq == 666000000) || |
712 | (freq == 818000000)) { |
713 | mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */ |
714 | lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ |
715 | cp_cur = 0x28; /* 101, 0.2 */ |
716 | div_buf_cur = 0x20; /* 10, 200u */ |
717 | } else { |
718 | mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ |
719 | lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ |
720 | cp_cur = 0x38; /* 111, auto */ |
721 | div_buf_cur = 0x30; /* 11, 150u */ |
722 | } |
723 | lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ |
724 | mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ |
725 | air_cable1_in = 0x00; |
726 | cable2_in = 0x00; |
727 | pre_dect = 0x40; |
728 | lna_discharge = 14; |
729 | filter_cur = 0x40; /* 10, low */ |
730 | break; |
731 | case SYS_DVBT2: |
732 | mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ |
733 | lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ |
734 | lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ |
735 | mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ |
736 | air_cable1_in = 0x00; |
737 | cable2_in = 0x00; |
738 | pre_dect = 0x40; |
739 | lna_discharge = 14; |
740 | cp_cur = 0x38; /* 111, auto */ |
741 | div_buf_cur = 0x30; /* 11, 150u */ |
742 | filter_cur = 0x40; /* 10, low */ |
743 | break; |
744 | case SYS_ISDBT: |
745 | mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ |
746 | lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ |
747 | lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */ |
748 | mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ |
749 | air_cable1_in = 0x00; |
750 | cable2_in = 0x00; |
751 | pre_dect = 0x40; |
752 | lna_discharge = 14; |
753 | cp_cur = 0x38; /* 111, auto */ |
754 | div_buf_cur = 0x30; /* 11, 150u */ |
755 | filter_cur = 0x40; /* 10, low */ |
756 | break; |
757 | case SYS_DVBC_ANNEX_A: |
758 | mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ |
759 | lna_top = 0xe5; |
760 | lna_vth_l = 0x62; |
761 | mixer_vth_l = 0x75; |
762 | air_cable1_in = 0x60; |
763 | cable2_in = 0x00; |
764 | pre_dect = 0x40; |
765 | lna_discharge = 14; |
766 | cp_cur = 0x38; /* 111, auto */ |
767 | div_buf_cur = 0x30; /* 11, 150u */ |
768 | filter_cur = 0x40; /* 10, low */ |
769 | break; |
770 | default: /* DVB-T 8M */ |
771 | mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ |
772 | lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ |
773 | lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ |
774 | mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ |
775 | air_cable1_in = 0x00; |
776 | cable2_in = 0x00; |
777 | pre_dect = 0x40; |
778 | lna_discharge = 14; |
779 | cp_cur = 0x38; /* 111, auto */ |
780 | div_buf_cur = 0x30; /* 11, 150u */ |
781 | filter_cur = 0x40; /* 10, low */ |
782 | break; |
783 | } |
784 | |
785 | if (priv->cfg->use_diplexer && |
786 | ((priv->cfg->rafael_chip == CHIP_R820T) || |
787 | (priv->cfg->rafael_chip == CHIP_R828S) || |
788 | (priv->cfg->rafael_chip == CHIP_R820C))) { |
789 | if (freq > DIP_FREQ) |
790 | air_cable1_in = 0x00; |
791 | else |
792 | air_cable1_in = 0x60; |
793 | cable2_in = 0x00; |
794 | } |
795 | |
796 | |
797 | if (priv->cfg->use_predetect) { |
798 | rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40); |
799 | if (rc < 0) |
800 | return rc; |
801 | } |
802 | |
803 | rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7); |
804 | if (rc < 0) |
805 | return rc; |
806 | rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8); |
807 | if (rc < 0) |
808 | return rc; |
809 | rc = r820t_write_reg(priv, 0x0d, lna_vth_l); |
810 | if (rc < 0) |
811 | return rc; |
812 | rc = r820t_write_reg(priv, 0x0e, mixer_vth_l); |
813 | if (rc < 0) |
814 | return rc; |
815 | |
816 | /* Air-IN only for Astrometa */ |
817 | rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60); |
818 | if (rc < 0) |
819 | return rc; |
820 | rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08); |
821 | if (rc < 0) |
822 | return rc; |
823 | |
824 | rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38); |
825 | if (rc < 0) |
826 | return rc; |
827 | rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30); |
828 | if (rc < 0) |
829 | return rc; |
830 | rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60); |
831 | if (rc < 0) |
832 | return rc; |
833 | /* |
834 | * Original driver initializes regs 0x05 and 0x06 with the |
835 | * same value again on this point. Probably, it is just an |
836 | * error there |
837 | */ |
838 | |
839 | /* |
840 | * Set LNA |
841 | */ |
842 | |
843 | tuner_dbg("adjusting LNA parameters\n" ); |
844 | if (type != V4L2_TUNER_ANALOG_TV) { |
845 | /* LNA TOP: lowest */ |
846 | rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38); |
847 | if (rc < 0) |
848 | return rc; |
849 | |
850 | /* 0: normal mode */ |
851 | rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04); |
852 | if (rc < 0) |
853 | return rc; |
854 | |
855 | /* 0: PRE_DECT off */ |
856 | rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40); |
857 | if (rc < 0) |
858 | return rc; |
859 | |
860 | /* agc clk 250hz */ |
861 | rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30); |
862 | if (rc < 0) |
863 | return rc; |
864 | |
865 | msleep(250); |
866 | |
867 | /* write LNA TOP = 3 */ |
868 | rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38); |
869 | if (rc < 0) |
870 | return rc; |
871 | |
872 | /* |
873 | * write discharge mode |
874 | * FIXME: IMHO, the mask here is wrong, but it matches |
875 | * what's there at the original driver |
876 | */ |
877 | rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04); |
878 | if (rc < 0) |
879 | return rc; |
880 | |
881 | /* LNA discharge current */ |
882 | rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f); |
883 | if (rc < 0) |
884 | return rc; |
885 | |
886 | /* agc clk 60hz */ |
887 | rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30); |
888 | if (rc < 0) |
889 | return rc; |
890 | } else { |
891 | /* PRE_DECT off */ |
892 | rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40); |
893 | if (rc < 0) |
894 | return rc; |
895 | |
896 | /* write LNA TOP */ |
897 | rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38); |
898 | if (rc < 0) |
899 | return rc; |
900 | |
901 | /* |
902 | * write discharge mode |
903 | * FIXME: IMHO, the mask here is wrong, but it matches |
904 | * what's there at the original driver |
905 | */ |
906 | rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04); |
907 | if (rc < 0) |
908 | return rc; |
909 | |
910 | /* LNA discharge current */ |
911 | rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f); |
912 | if (rc < 0) |
913 | return rc; |
914 | |
915 | /* agc clk 1Khz, external det1 cap 1u */ |
916 | rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30); |
917 | if (rc < 0) |
918 | return rc; |
919 | |
920 | rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04); |
921 | if (rc < 0) |
922 | return rc; |
923 | } |
924 | return 0; |
925 | } |
926 | |
927 | static int r820t_set_tv_standard(struct r820t_priv *priv, |
928 | unsigned bw, |
929 | enum v4l2_tuner_type type, |
930 | v4l2_std_id std, u32 delsys) |
931 | |
932 | { |
933 | int rc, i; |
934 | u32 if_khz, filt_cal_lo; |
935 | u8 data[5], val; |
936 | u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through; |
937 | u8 lt_att, flt_ext_widest, polyfil_cur; |
938 | bool need_calibration; |
939 | |
940 | tuner_dbg("selecting the delivery system\n" ); |
941 | |
942 | if (delsys == SYS_ISDBT) { |
943 | if_khz = 4063; |
944 | filt_cal_lo = 59000; |
945 | filt_gain = 0x10; /* +3db, 6mhz on */ |
946 | img_r = 0x00; /* image negative */ |
947 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
948 | hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */ |
949 | ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */ |
950 | loop_through = 0x00; /* r5[7], lt on */ |
951 | lt_att = 0x00; /* r31[7], lt att enable */ |
952 | flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */ |
953 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
954 | } else if (delsys == SYS_DVBC_ANNEX_A) { |
955 | if_khz = 5070; |
956 | filt_cal_lo = 73500; |
957 | filt_gain = 0x10; /* +3db, 6mhz on */ |
958 | img_r = 0x00; /* image negative */ |
959 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
960 | hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */ |
961 | ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
962 | loop_through = 0x00; /* r5[7], lt on */ |
963 | lt_att = 0x00; /* r31[7], lt att enable */ |
964 | flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ |
965 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
966 | } else if (delsys == SYS_DVBC_ANNEX_C) { |
967 | if_khz = 4063; |
968 | filt_cal_lo = 55000; |
969 | filt_gain = 0x10; /* +3db, 6mhz on */ |
970 | img_r = 0x00; /* image negative */ |
971 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
972 | hp_cor = 0x6a; /* 1.7m disable, +0cap, 1.0mhz */ |
973 | ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
974 | loop_through = 0x00; /* r5[7], lt on */ |
975 | lt_att = 0x00; /* r31[7], lt att enable */ |
976 | flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */ |
977 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
978 | } else { |
979 | if (bw <= 6) { |
980 | if_khz = 3570; |
981 | filt_cal_lo = 56000; /* 52000->56000 */ |
982 | filt_gain = 0x10; /* +3db, 6mhz on */ |
983 | img_r = 0x00; /* image negative */ |
984 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
985 | hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */ |
986 | ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
987 | loop_through = 0x00; /* r5[7], lt on */ |
988 | lt_att = 0x00; /* r31[7], lt att enable */ |
989 | flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ |
990 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
991 | } else if (bw == 7) { |
992 | #if 0 |
993 | /* |
994 | * There are two 7 MHz tables defined on the original |
995 | * driver, but just the second one seems to be visible |
996 | * by rtl2832. Keep this one here commented, as it |
997 | * might be needed in the future |
998 | */ |
999 | |
1000 | if_khz = 4070; |
1001 | filt_cal_lo = 60000; |
1002 | filt_gain = 0x10; /* +3db, 6mhz on */ |
1003 | img_r = 0x00; /* image negative */ |
1004 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
1005 | hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */ |
1006 | ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
1007 | loop_through = 0x00; /* r5[7], lt on */ |
1008 | lt_att = 0x00; /* r31[7], lt att enable */ |
1009 | flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ |
1010 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
1011 | #endif |
1012 | /* 7 MHz, second table */ |
1013 | if_khz = 4570; |
1014 | filt_cal_lo = 63000; |
1015 | filt_gain = 0x10; /* +3db, 6mhz on */ |
1016 | img_r = 0x00; /* image negative */ |
1017 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
1018 | hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */ |
1019 | ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
1020 | loop_through = 0x00; /* r5[7], lt on */ |
1021 | lt_att = 0x00; /* r31[7], lt att enable */ |
1022 | flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ |
1023 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
1024 | } else { |
1025 | if_khz = 4570; |
1026 | filt_cal_lo = 68500; |
1027 | filt_gain = 0x10; /* +3db, 6mhz on */ |
1028 | img_r = 0x00; /* image negative */ |
1029 | filt_q = 0x10; /* r10[4]:low q(1'b1) */ |
1030 | hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */ |
1031 | ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ |
1032 | loop_through = 0x00; /* r5[7], lt on */ |
1033 | lt_att = 0x00; /* r31[7], lt att enable */ |
1034 | flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ |
1035 | polyfil_cur = 0x60; /* r25[6:5]:min */ |
1036 | } |
1037 | } |
1038 | |
1039 | /* Initialize the shadow registers */ |
1040 | memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); |
1041 | |
1042 | /* Init Flag & Xtal_check Result */ |
1043 | if (priv->imr_done) |
1044 | val = 1 | priv->xtal_cap_sel << 1; |
1045 | else |
1046 | val = 0; |
1047 | rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f); |
1048 | if (rc < 0) |
1049 | return rc; |
1050 | |
1051 | /* version */ |
1052 | rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f); |
1053 | if (rc < 0) |
1054 | return rc; |
1055 | |
1056 | /* for LT Gain test */ |
1057 | if (type != V4L2_TUNER_ANALOG_TV) { |
1058 | rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38); |
1059 | if (rc < 0) |
1060 | return rc; |
1061 | usleep_range(1000, 2000); |
1062 | } |
1063 | priv->int_freq = if_khz * 1000; |
1064 | |
1065 | /* Check if standard changed. If so, filter calibration is needed */ |
1066 | if (type != priv->type) |
1067 | need_calibration = true; |
1068 | else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std)) |
1069 | need_calibration = true; |
1070 | else if ((type == V4L2_TUNER_DIGITAL_TV) && |
1071 | ((delsys != priv->delsys) || bw != priv->bw)) |
1072 | need_calibration = true; |
1073 | else |
1074 | need_calibration = false; |
1075 | |
1076 | if (need_calibration) { |
1077 | tuner_dbg("calibrating the tuner\n" ); |
1078 | for (i = 0; i < 2; i++) { |
1079 | /* Set filt_cap */ |
1080 | rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60); |
1081 | if (rc < 0) |
1082 | return rc; |
1083 | |
1084 | /* set cali clk =on */ |
1085 | rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04); |
1086 | if (rc < 0) |
1087 | return rc; |
1088 | |
1089 | /* X'tal cap 0pF for PLL */ |
1090 | rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03); |
1091 | if (rc < 0) |
1092 | return rc; |
1093 | |
1094 | rc = r820t_set_pll(priv, type, filt_cal_lo * 1000); |
1095 | if (rc < 0 || !priv->has_lock) |
1096 | return rc; |
1097 | |
1098 | /* Start Trigger */ |
1099 | rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10); |
1100 | if (rc < 0) |
1101 | return rc; |
1102 | |
1103 | usleep_range(1000, 2000); |
1104 | |
1105 | /* Stop Trigger */ |
1106 | rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10); |
1107 | if (rc < 0) |
1108 | return rc; |
1109 | |
1110 | /* set cali clk =off */ |
1111 | rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04); |
1112 | if (rc < 0) |
1113 | return rc; |
1114 | |
1115 | /* Check if calibration worked */ |
1116 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
1117 | if (rc < 0) |
1118 | return rc; |
1119 | |
1120 | priv->fil_cal_code = data[4] & 0x0f; |
1121 | if (priv->fil_cal_code && priv->fil_cal_code != 0x0f) |
1122 | break; |
1123 | } |
1124 | /* narrowest */ |
1125 | if (priv->fil_cal_code == 0x0f) |
1126 | priv->fil_cal_code = 0; |
1127 | } |
1128 | |
1129 | rc = r820t_write_reg_mask(priv, 0x0a, |
1130 | filt_q | priv->fil_cal_code, 0x1f); |
1131 | if (rc < 0) |
1132 | return rc; |
1133 | |
1134 | /* Set BW, Filter_gain, & HP corner */ |
1135 | rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef); |
1136 | if (rc < 0) |
1137 | return rc; |
1138 | |
1139 | |
1140 | /* Set Img_R */ |
1141 | rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80); |
1142 | if (rc < 0) |
1143 | return rc; |
1144 | |
1145 | /* Set filt_3dB, V6MHz */ |
1146 | rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30); |
1147 | if (rc < 0) |
1148 | return rc; |
1149 | |
1150 | /* channel filter extension */ |
1151 | rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60); |
1152 | if (rc < 0) |
1153 | return rc; |
1154 | |
1155 | /* Loop through */ |
1156 | rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80); |
1157 | if (rc < 0) |
1158 | return rc; |
1159 | |
1160 | /* Loop through attenuation */ |
1161 | rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80); |
1162 | if (rc < 0) |
1163 | return rc; |
1164 | |
1165 | /* filter extension widest */ |
1166 | rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80); |
1167 | if (rc < 0) |
1168 | return rc; |
1169 | |
1170 | /* RF poly filter current */ |
1171 | rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60); |
1172 | if (rc < 0) |
1173 | return rc; |
1174 | |
1175 | /* Store current standard. If it changes, re-calibrate the tuner */ |
1176 | priv->delsys = delsys; |
1177 | priv->type = type; |
1178 | priv->std = std; |
1179 | priv->bw = bw; |
1180 | |
1181 | return 0; |
1182 | } |
1183 | |
1184 | static int r820t_read_gain(struct r820t_priv *priv) |
1185 | { |
1186 | u8 data[4]; |
1187 | int rc; |
1188 | |
1189 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
1190 | if (rc < 0) |
1191 | return rc; |
1192 | |
1193 | return ((data[3] & 0x08) << 1) + ((data[3] & 0xf0) >> 4); |
1194 | } |
1195 | |
1196 | #if 0 |
1197 | /* FIXME: This routine requires more testing */ |
1198 | |
1199 | /* |
1200 | * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm |
1201 | * input power, for raw results see: |
1202 | * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/ |
1203 | */ |
1204 | |
1205 | static const int r820t_lna_gain_steps[] = { |
1206 | 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13 |
1207 | }; |
1208 | |
1209 | static const int r820t_mixer_gain_steps[] = { |
1210 | 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8 |
1211 | }; |
1212 | |
1213 | static int r820t_set_gain_mode(struct r820t_priv *priv, |
1214 | bool set_manual_gain, |
1215 | int gain) |
1216 | { |
1217 | int rc; |
1218 | |
1219 | if (set_manual_gain) { |
1220 | int i, total_gain = 0; |
1221 | uint8_t mix_index = 0, lna_index = 0; |
1222 | u8 data[4]; |
1223 | |
1224 | /* LNA auto off */ |
1225 | rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10); |
1226 | if (rc < 0) |
1227 | return rc; |
1228 | |
1229 | /* Mixer auto off */ |
1230 | rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10); |
1231 | if (rc < 0) |
1232 | return rc; |
1233 | |
1234 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
1235 | if (rc < 0) |
1236 | return rc; |
1237 | |
1238 | /* set fixed VGA gain for now (16.3 dB) */ |
1239 | rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f); |
1240 | if (rc < 0) |
1241 | return rc; |
1242 | |
1243 | for (i = 0; i < 15; i++) { |
1244 | if (total_gain >= gain) |
1245 | break; |
1246 | |
1247 | total_gain += r820t_lna_gain_steps[++lna_index]; |
1248 | |
1249 | if (total_gain >= gain) |
1250 | break; |
1251 | |
1252 | total_gain += r820t_mixer_gain_steps[++mix_index]; |
1253 | } |
1254 | |
1255 | /* set LNA gain */ |
1256 | rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f); |
1257 | if (rc < 0) |
1258 | return rc; |
1259 | |
1260 | /* set Mixer gain */ |
1261 | rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f); |
1262 | if (rc < 0) |
1263 | return rc; |
1264 | } else { |
1265 | /* LNA */ |
1266 | rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10); |
1267 | if (rc < 0) |
1268 | return rc; |
1269 | |
1270 | /* Mixer */ |
1271 | rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10); |
1272 | if (rc < 0) |
1273 | return rc; |
1274 | |
1275 | /* set fixed VGA gain for now (26.5 dB) */ |
1276 | rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f); |
1277 | if (rc < 0) |
1278 | return rc; |
1279 | } |
1280 | |
1281 | return 0; |
1282 | } |
1283 | #endif |
1284 | |
1285 | static int generic_set_freq(struct dvb_frontend *fe, |
1286 | u32 freq /* in HZ */, |
1287 | unsigned bw, |
1288 | enum v4l2_tuner_type type, |
1289 | v4l2_std_id std, u32 delsys) |
1290 | { |
1291 | struct r820t_priv *priv = fe->tuner_priv; |
1292 | int rc; |
1293 | u32 lo_freq; |
1294 | |
1295 | tuner_dbg("should set frequency to %d kHz, bw %d MHz\n" , |
1296 | freq / 1000, bw); |
1297 | |
1298 | rc = r820t_set_tv_standard(priv, bw, type, std, delsys); |
1299 | if (rc < 0) |
1300 | goto err; |
1301 | |
1302 | if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC)) |
1303 | lo_freq = freq - priv->int_freq; |
1304 | else |
1305 | lo_freq = freq + priv->int_freq; |
1306 | |
1307 | rc = r820t_set_mux(priv, lo_freq); |
1308 | if (rc < 0) |
1309 | goto err; |
1310 | |
1311 | rc = r820t_set_pll(priv, type, lo_freq); |
1312 | if (rc < 0 || !priv->has_lock) |
1313 | goto err; |
1314 | |
1315 | rc = r820t_sysfreq_sel(priv, freq, type, std, delsys); |
1316 | if (rc < 0) |
1317 | goto err; |
1318 | |
1319 | tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n" , |
1320 | __func__, freq, r820t_read_gain(priv)); |
1321 | |
1322 | err: |
1323 | |
1324 | if (rc < 0) |
1325 | tuner_dbg("%s: failed=%d\n" , __func__, rc); |
1326 | return rc; |
1327 | } |
1328 | |
1329 | /* |
1330 | * r820t standby logic |
1331 | */ |
1332 | |
1333 | static int r820t_standby(struct r820t_priv *priv) |
1334 | { |
1335 | int rc; |
1336 | |
1337 | /* If device was not initialized yet, don't need to standby */ |
1338 | if (!priv->init_done) |
1339 | return 0; |
1340 | |
1341 | rc = r820t_write_reg(priv, 0x06, 0xb1); |
1342 | if (rc < 0) |
1343 | return rc; |
1344 | rc = r820t_write_reg(priv, 0x05, 0x03); |
1345 | if (rc < 0) |
1346 | return rc; |
1347 | rc = r820t_write_reg(priv, 0x07, 0x3a); |
1348 | if (rc < 0) |
1349 | return rc; |
1350 | rc = r820t_write_reg(priv, 0x08, 0x40); |
1351 | if (rc < 0) |
1352 | return rc; |
1353 | rc = r820t_write_reg(priv, 0x09, 0xc0); |
1354 | if (rc < 0) |
1355 | return rc; |
1356 | rc = r820t_write_reg(priv, 0x0a, 0x36); |
1357 | if (rc < 0) |
1358 | return rc; |
1359 | rc = r820t_write_reg(priv, 0x0c, 0x35); |
1360 | if (rc < 0) |
1361 | return rc; |
1362 | rc = r820t_write_reg(priv, 0x0f, 0x68); |
1363 | if (rc < 0) |
1364 | return rc; |
1365 | rc = r820t_write_reg(priv, 0x11, 0x03); |
1366 | if (rc < 0) |
1367 | return rc; |
1368 | rc = r820t_write_reg(priv, 0x17, 0xf4); |
1369 | if (rc < 0) |
1370 | return rc; |
1371 | rc = r820t_write_reg(priv, 0x19, 0x0c); |
1372 | |
1373 | /* Force initial calibration */ |
1374 | priv->type = -1; |
1375 | |
1376 | return rc; |
1377 | } |
1378 | |
1379 | /* |
1380 | * r820t device init logic |
1381 | */ |
1382 | |
1383 | static int r820t_xtal_check(struct r820t_priv *priv) |
1384 | { |
1385 | int rc, i; |
1386 | u8 data[3], val; |
1387 | |
1388 | /* Initialize the shadow registers */ |
1389 | memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); |
1390 | |
1391 | /* cap 30pF & Drive Low */ |
1392 | rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b); |
1393 | if (rc < 0) |
1394 | return rc; |
1395 | |
1396 | /* set pll autotune = 128kHz */ |
1397 | rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c); |
1398 | if (rc < 0) |
1399 | return rc; |
1400 | |
1401 | /* set manual initial reg = 111111; */ |
1402 | rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f); |
1403 | if (rc < 0) |
1404 | return rc; |
1405 | |
1406 | /* set auto */ |
1407 | rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40); |
1408 | if (rc < 0) |
1409 | return rc; |
1410 | |
1411 | /* Try several xtal capacitor alternatives */ |
1412 | for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) { |
1413 | rc = r820t_write_reg_mask(priv, 0x10, |
1414 | r820t_xtal_capacitor[i][0], 0x1b); |
1415 | if (rc < 0) |
1416 | return rc; |
1417 | |
1418 | usleep_range(5000, 6000); |
1419 | |
1420 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
1421 | if (rc < 0) |
1422 | return rc; |
1423 | if (!(data[2] & 0x40)) |
1424 | continue; |
1425 | |
1426 | val = data[2] & 0x3f; |
1427 | |
1428 | if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23)) |
1429 | break; |
1430 | |
1431 | if (val != 0x3f) |
1432 | break; |
1433 | } |
1434 | |
1435 | if (i == ARRAY_SIZE(r820t_xtal_capacitor)) |
1436 | return -EINVAL; |
1437 | |
1438 | return r820t_xtal_capacitor[i][1]; |
1439 | } |
1440 | |
1441 | static int r820t_imr_prepare(struct r820t_priv *priv) |
1442 | { |
1443 | int rc; |
1444 | |
1445 | /* Initialize the shadow registers */ |
1446 | memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); |
1447 | |
1448 | /* lna off (air-in off) */ |
1449 | rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20); |
1450 | if (rc < 0) |
1451 | return rc; |
1452 | |
1453 | /* mixer gain mode = manual */ |
1454 | rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10); |
1455 | if (rc < 0) |
1456 | return rc; |
1457 | |
1458 | /* filter corner = lowest */ |
1459 | rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f); |
1460 | if (rc < 0) |
1461 | return rc; |
1462 | |
1463 | /* filter bw=+2cap, hp=5M */ |
1464 | rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f); |
1465 | if (rc < 0) |
1466 | return rc; |
1467 | |
1468 | /* adc=on, vga code mode, gain = 26.5dB */ |
1469 | rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f); |
1470 | if (rc < 0) |
1471 | return rc; |
1472 | |
1473 | /* ring clk = on */ |
1474 | rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08); |
1475 | if (rc < 0) |
1476 | return rc; |
1477 | |
1478 | /* ring power = on */ |
1479 | rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10); |
1480 | if (rc < 0) |
1481 | return rc; |
1482 | |
1483 | /* from ring = ring pll in */ |
1484 | rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02); |
1485 | if (rc < 0) |
1486 | return rc; |
1487 | |
1488 | /* sw_pdect = det3 */ |
1489 | rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80); |
1490 | if (rc < 0) |
1491 | return rc; |
1492 | |
1493 | /* Set filt_3dB */ |
1494 | rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20); |
1495 | |
1496 | return rc; |
1497 | } |
1498 | |
1499 | static int r820t_multi_read(struct r820t_priv *priv) |
1500 | { |
1501 | int rc, i; |
1502 | u16 sum = 0; |
1503 | u8 data[2], min = 255, max = 0; |
1504 | |
1505 | usleep_range(5000, 6000); |
1506 | |
1507 | for (i = 0; i < 6; i++) { |
1508 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
1509 | if (rc < 0) |
1510 | return rc; |
1511 | |
1512 | sum += data[1]; |
1513 | |
1514 | if (data[1] < min) |
1515 | min = data[1]; |
1516 | |
1517 | if (data[1] > max) |
1518 | max = data[1]; |
1519 | } |
1520 | rc = sum - max - min; |
1521 | |
1522 | return rc; |
1523 | } |
1524 | |
1525 | static int r820t_imr_cross(struct r820t_priv *priv, |
1526 | struct r820t_sect_type iq_point[3], |
1527 | u8 *x_direct) |
1528 | { |
1529 | struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */ |
1530 | struct r820t_sect_type tmp; |
1531 | int i, rc; |
1532 | u8 reg08, reg09; |
1533 | |
1534 | reg08 = r820t_read_cache_reg(priv, 8) & 0xc0; |
1535 | reg09 = r820t_read_cache_reg(priv, 9) & 0xc0; |
1536 | |
1537 | tmp.gain_x = 0; |
1538 | tmp.phase_y = 0; |
1539 | tmp.value = 255; |
1540 | |
1541 | for (i = 0; i < 5; i++) { |
1542 | switch (i) { |
1543 | case 0: |
1544 | cross[i].gain_x = reg08; |
1545 | cross[i].phase_y = reg09; |
1546 | break; |
1547 | case 1: |
1548 | cross[i].gain_x = reg08; /* 0 */ |
1549 | cross[i].phase_y = reg09 + 1; /* Q-1 */ |
1550 | break; |
1551 | case 2: |
1552 | cross[i].gain_x = reg08; /* 0 */ |
1553 | cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */ |
1554 | break; |
1555 | case 3: |
1556 | cross[i].gain_x = reg08 + 1; /* Q-1 */ |
1557 | cross[i].phase_y = reg09; |
1558 | break; |
1559 | default: |
1560 | cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */ |
1561 | cross[i].phase_y = reg09; |
1562 | } |
1563 | |
1564 | rc = r820t_write_reg(priv, 0x08, cross[i].gain_x); |
1565 | if (rc < 0) |
1566 | return rc; |
1567 | |
1568 | rc = r820t_write_reg(priv, 0x09, cross[i].phase_y); |
1569 | if (rc < 0) |
1570 | return rc; |
1571 | |
1572 | rc = r820t_multi_read(priv); |
1573 | if (rc < 0) |
1574 | return rc; |
1575 | |
1576 | cross[i].value = rc; |
1577 | |
1578 | if (cross[i].value < tmp.value) |
1579 | tmp = cross[i]; |
1580 | } |
1581 | |
1582 | if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */ |
1583 | *x_direct = 0; |
1584 | |
1585 | iq_point[0] = cross[0]; |
1586 | iq_point[1] = cross[1]; |
1587 | iq_point[2] = cross[2]; |
1588 | } else { /* (0,0) or x-direction */ |
1589 | *x_direct = 1; |
1590 | |
1591 | iq_point[0] = cross[0]; |
1592 | iq_point[1] = cross[3]; |
1593 | iq_point[2] = cross[4]; |
1594 | } |
1595 | return 0; |
1596 | } |
1597 | |
1598 | static void r820t_compre_cor(struct r820t_sect_type iq[3]) |
1599 | { |
1600 | int i; |
1601 | |
1602 | for (i = 3; i > 0; i--) { |
1603 | if (iq[0].value > iq[i - 1].value) |
1604 | swap(iq[0], iq[i - 1]); |
1605 | } |
1606 | } |
1607 | |
1608 | static int r820t_compre_step(struct r820t_priv *priv, |
1609 | struct r820t_sect_type iq[3], u8 reg) |
1610 | { |
1611 | int rc; |
1612 | struct r820t_sect_type tmp; |
1613 | |
1614 | /* |
1615 | * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare |
1616 | * with min value: |
1617 | * new < min => update to min and continue |
1618 | * new > min => Exit |
1619 | */ |
1620 | |
1621 | /* min value already saved in iq[0] */ |
1622 | tmp.phase_y = iq[0].phase_y; |
1623 | tmp.gain_x = iq[0].gain_x; |
1624 | |
1625 | while (((tmp.gain_x & 0x1f) < IMR_TRIAL) && |
1626 | ((tmp.phase_y & 0x1f) < IMR_TRIAL)) { |
1627 | if (reg == 0x08) |
1628 | tmp.gain_x++; |
1629 | else |
1630 | tmp.phase_y++; |
1631 | |
1632 | rc = r820t_write_reg(priv, 0x08, tmp.gain_x); |
1633 | if (rc < 0) |
1634 | return rc; |
1635 | |
1636 | rc = r820t_write_reg(priv, 0x09, tmp.phase_y); |
1637 | if (rc < 0) |
1638 | return rc; |
1639 | |
1640 | rc = r820t_multi_read(priv); |
1641 | if (rc < 0) |
1642 | return rc; |
1643 | tmp.value = rc; |
1644 | |
1645 | if (tmp.value <= iq[0].value) { |
1646 | iq[0].gain_x = tmp.gain_x; |
1647 | iq[0].phase_y = tmp.phase_y; |
1648 | iq[0].value = tmp.value; |
1649 | } else { |
1650 | return 0; |
1651 | } |
1652 | |
1653 | } |
1654 | |
1655 | return 0; |
1656 | } |
1657 | |
1658 | static int r820t_iq_tree(struct r820t_priv *priv, |
1659 | struct r820t_sect_type iq[3], |
1660 | u8 fix_val, u8 var_val, u8 fix_reg) |
1661 | { |
1662 | int rc, i; |
1663 | u8 tmp, var_reg; |
1664 | |
1665 | /* |
1666 | * record IMC results by input gain/phase location then adjust |
1667 | * gain or phase positive 1 step and negative 1 step, |
1668 | * both record results |
1669 | */ |
1670 | |
1671 | if (fix_reg == 0x08) |
1672 | var_reg = 0x09; |
1673 | else |
1674 | var_reg = 0x08; |
1675 | |
1676 | for (i = 0; i < 3; i++) { |
1677 | rc = r820t_write_reg(priv, fix_reg, fix_val); |
1678 | if (rc < 0) |
1679 | return rc; |
1680 | |
1681 | rc = r820t_write_reg(priv, var_reg, var_val); |
1682 | if (rc < 0) |
1683 | return rc; |
1684 | |
1685 | rc = r820t_multi_read(priv); |
1686 | if (rc < 0) |
1687 | return rc; |
1688 | iq[i].value = rc; |
1689 | |
1690 | if (fix_reg == 0x08) { |
1691 | iq[i].gain_x = fix_val; |
1692 | iq[i].phase_y = var_val; |
1693 | } else { |
1694 | iq[i].phase_y = fix_val; |
1695 | iq[i].gain_x = var_val; |
1696 | } |
1697 | |
1698 | if (i == 0) { /* try right-side point */ |
1699 | var_val++; |
1700 | } else if (i == 1) { /* try left-side point */ |
1701 | /* if absolute location is 1, change I/Q direction */ |
1702 | if ((var_val & 0x1f) < 0x02) { |
1703 | tmp = 2 - (var_val & 0x1f); |
1704 | |
1705 | /* b[5]:I/Q selection. 0:Q-path, 1:I-path */ |
1706 | if (var_val & 0x20) { |
1707 | var_val &= 0xc0; |
1708 | var_val |= tmp; |
1709 | } else { |
1710 | var_val |= 0x20 | tmp; |
1711 | } |
1712 | } else { |
1713 | var_val -= 2; |
1714 | } |
1715 | } |
1716 | } |
1717 | |
1718 | return 0; |
1719 | } |
1720 | |
1721 | static int r820t_section(struct r820t_priv *priv, |
1722 | struct r820t_sect_type *iq_point) |
1723 | { |
1724 | int rc; |
1725 | struct r820t_sect_type compare_iq[3], compare_bet[3]; |
1726 | |
1727 | /* Try X-1 column and save min result to compare_bet[0] */ |
1728 | if (!(iq_point->gain_x & 0x1f)) |
1729 | compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */ |
1730 | else |
1731 | compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */ |
1732 | compare_iq[0].phase_y = iq_point->phase_y; |
1733 | |
1734 | /* y-direction */ |
1735 | rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, |
1736 | compare_iq[0].phase_y, 0x08); |
1737 | if (rc < 0) |
1738 | return rc; |
1739 | |
1740 | r820t_compre_cor(compare_iq); |
1741 | |
1742 | compare_bet[0] = compare_iq[0]; |
1743 | |
1744 | /* Try X column and save min result to compare_bet[1] */ |
1745 | compare_iq[0].gain_x = iq_point->gain_x; |
1746 | compare_iq[0].phase_y = iq_point->phase_y; |
1747 | |
1748 | rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, |
1749 | compare_iq[0].phase_y, 0x08); |
1750 | if (rc < 0) |
1751 | return rc; |
1752 | |
1753 | r820t_compre_cor(compare_iq); |
1754 | |
1755 | compare_bet[1] = compare_iq[0]; |
1756 | |
1757 | /* Try X+1 column and save min result to compare_bet[2] */ |
1758 | if ((iq_point->gain_x & 0x1f) == 0x00) |
1759 | compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */ |
1760 | else |
1761 | compare_iq[0].gain_x = iq_point->gain_x + 1; |
1762 | compare_iq[0].phase_y = iq_point->phase_y; |
1763 | |
1764 | rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, |
1765 | compare_iq[0].phase_y, 0x08); |
1766 | if (rc < 0) |
1767 | return rc; |
1768 | |
1769 | r820t_compre_cor(compare_iq); |
1770 | |
1771 | compare_bet[2] = compare_iq[0]; |
1772 | |
1773 | r820t_compre_cor(compare_bet); |
1774 | |
1775 | *iq_point = compare_bet[0]; |
1776 | |
1777 | return 0; |
1778 | } |
1779 | |
1780 | static int r820t_vga_adjust(struct r820t_priv *priv) |
1781 | { |
1782 | int rc; |
1783 | u8 vga_count; |
1784 | |
1785 | /* increase vga power to let image significant */ |
1786 | for (vga_count = 12; vga_count < 16; vga_count++) { |
1787 | rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f); |
1788 | if (rc < 0) |
1789 | return rc; |
1790 | |
1791 | usleep_range(10000, 11000); |
1792 | |
1793 | rc = r820t_multi_read(priv); |
1794 | if (rc < 0) |
1795 | return rc; |
1796 | |
1797 | if (rc > 40 * 4) |
1798 | break; |
1799 | } |
1800 | |
1801 | return 0; |
1802 | } |
1803 | |
1804 | static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont) |
1805 | { |
1806 | struct r820t_sect_type compare_iq[3]; |
1807 | int rc; |
1808 | u8 x_direction = 0; /* 1:x, 0:y */ |
1809 | u8 dir_reg, other_reg; |
1810 | |
1811 | r820t_vga_adjust(priv); |
1812 | |
1813 | rc = r820t_imr_cross(priv, compare_iq, &x_direction); |
1814 | if (rc < 0) |
1815 | return rc; |
1816 | |
1817 | if (x_direction == 1) { |
1818 | dir_reg = 0x08; |
1819 | other_reg = 0x09; |
1820 | } else { |
1821 | dir_reg = 0x09; |
1822 | other_reg = 0x08; |
1823 | } |
1824 | |
1825 | /* compare and find min of 3 points. determine i/q direction */ |
1826 | r820t_compre_cor(compare_iq); |
1827 | |
1828 | /* increase step to find min value of this direction */ |
1829 | rc = r820t_compre_step(priv, compare_iq, dir_reg); |
1830 | if (rc < 0) |
1831 | return rc; |
1832 | |
1833 | /* the other direction */ |
1834 | rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, |
1835 | compare_iq[0].phase_y, dir_reg); |
1836 | if (rc < 0) |
1837 | return rc; |
1838 | |
1839 | /* compare and find min of 3 points. determine i/q direction */ |
1840 | r820t_compre_cor(compare_iq); |
1841 | |
1842 | /* increase step to find min value on this direction */ |
1843 | rc = r820t_compre_step(priv, compare_iq, other_reg); |
1844 | if (rc < 0) |
1845 | return rc; |
1846 | |
1847 | /* check 3 points again */ |
1848 | rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, |
1849 | compare_iq[0].phase_y, other_reg); |
1850 | if (rc < 0) |
1851 | return rc; |
1852 | |
1853 | r820t_compre_cor(compare_iq); |
1854 | |
1855 | /* section-9 check */ |
1856 | rc = r820t_section(priv, compare_iq); |
1857 | |
1858 | *iq_pont = compare_iq[0]; |
1859 | |
1860 | /* reset gain/phase control setting */ |
1861 | rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f); |
1862 | if (rc < 0) |
1863 | return rc; |
1864 | |
1865 | rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f); |
1866 | |
1867 | return rc; |
1868 | } |
1869 | |
1870 | static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont) |
1871 | { |
1872 | int rc; |
1873 | |
1874 | r820t_vga_adjust(priv); |
1875 | |
1876 | /* |
1877 | * search surrounding points from previous point |
1878 | * try (x-1), (x), (x+1) columns, and find min IMR result point |
1879 | */ |
1880 | rc = r820t_section(priv, iq_pont); |
1881 | if (rc < 0) |
1882 | return rc; |
1883 | |
1884 | return 0; |
1885 | } |
1886 | |
1887 | static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag) |
1888 | { |
1889 | struct r820t_sect_type imr_point; |
1890 | int rc; |
1891 | u32 ring_vco, ring_freq, ring_ref; |
1892 | u8 n_ring, n; |
1893 | int reg18, reg19, reg1f; |
1894 | |
1895 | if (priv->cfg->xtal > 24000000) |
1896 | ring_ref = priv->cfg->xtal / 2000; |
1897 | else |
1898 | ring_ref = priv->cfg->xtal / 1000; |
1899 | |
1900 | n_ring = 15; |
1901 | for (n = 0; n < 16; n++) { |
1902 | if ((16 + n) * 8 * ring_ref >= 3100000) { |
1903 | n_ring = n; |
1904 | break; |
1905 | } |
1906 | } |
1907 | |
1908 | reg18 = r820t_read_cache_reg(priv, 0x18); |
1909 | reg19 = r820t_read_cache_reg(priv, 0x19); |
1910 | reg1f = r820t_read_cache_reg(priv, 0x1f); |
1911 | |
1912 | reg18 &= 0xf0; /* set ring[3:0] */ |
1913 | reg18 |= n_ring; |
1914 | |
1915 | ring_vco = (16 + n_ring) * 8 * ring_ref; |
1916 | |
1917 | reg18 &= 0xdf; /* clear ring_se23 */ |
1918 | reg19 &= 0xfc; /* clear ring_seldiv */ |
1919 | reg1f &= 0xfc; /* clear ring_att */ |
1920 | |
1921 | switch (imr_mem) { |
1922 | case 0: |
1923 | ring_freq = ring_vco / 48; |
1924 | reg18 |= 0x20; /* ring_se23 = 1 */ |
1925 | reg19 |= 0x03; /* ring_seldiv = 3 */ |
1926 | reg1f |= 0x02; /* ring_att 10 */ |
1927 | break; |
1928 | case 1: |
1929 | ring_freq = ring_vco / 16; |
1930 | reg18 |= 0x00; /* ring_se23 = 0 */ |
1931 | reg19 |= 0x02; /* ring_seldiv = 2 */ |
1932 | reg1f |= 0x00; /* pw_ring 00 */ |
1933 | break; |
1934 | case 2: |
1935 | ring_freq = ring_vco / 8; |
1936 | reg18 |= 0x00; /* ring_se23 = 0 */ |
1937 | reg19 |= 0x01; /* ring_seldiv = 1 */ |
1938 | reg1f |= 0x03; /* pw_ring 11 */ |
1939 | break; |
1940 | case 3: |
1941 | ring_freq = ring_vco / 6; |
1942 | reg18 |= 0x20; /* ring_se23 = 1 */ |
1943 | reg19 |= 0x00; /* ring_seldiv = 0 */ |
1944 | reg1f |= 0x03; /* pw_ring 11 */ |
1945 | break; |
1946 | case 4: |
1947 | ring_freq = ring_vco / 4; |
1948 | reg18 |= 0x00; /* ring_se23 = 0 */ |
1949 | reg19 |= 0x00; /* ring_seldiv = 0 */ |
1950 | reg1f |= 0x01; /* pw_ring 01 */ |
1951 | break; |
1952 | default: |
1953 | ring_freq = ring_vco / 4; |
1954 | reg18 |= 0x00; /* ring_se23 = 0 */ |
1955 | reg19 |= 0x00; /* ring_seldiv = 0 */ |
1956 | reg1f |= 0x01; /* pw_ring 01 */ |
1957 | break; |
1958 | } |
1959 | |
1960 | |
1961 | /* write pw_ring, n_ring, ringdiv2 registers */ |
1962 | |
1963 | /* n_ring, ring_se23 */ |
1964 | rc = r820t_write_reg(priv, 0x18, reg18); |
1965 | if (rc < 0) |
1966 | return rc; |
1967 | |
1968 | /* ring_sediv */ |
1969 | rc = r820t_write_reg(priv, 0x19, reg19); |
1970 | if (rc < 0) |
1971 | return rc; |
1972 | |
1973 | /* pw_ring */ |
1974 | rc = r820t_write_reg(priv, 0x1f, reg1f); |
1975 | if (rc < 0) |
1976 | return rc; |
1977 | |
1978 | /* mux input freq ~ rf_in freq */ |
1979 | rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000); |
1980 | if (rc < 0) |
1981 | return rc; |
1982 | |
1983 | rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV, |
1984 | (ring_freq - 5300) * 1000); |
1985 | if (!priv->has_lock) |
1986 | rc = -EINVAL; |
1987 | if (rc < 0) |
1988 | return rc; |
1989 | |
1990 | if (im_flag) { |
1991 | rc = r820t_iq(priv, &imr_point); |
1992 | } else { |
1993 | imr_point.gain_x = priv->imr_data[3].gain_x; |
1994 | imr_point.phase_y = priv->imr_data[3].phase_y; |
1995 | imr_point.value = priv->imr_data[3].value; |
1996 | |
1997 | rc = r820t_f_imr(priv, &imr_point); |
1998 | } |
1999 | if (rc < 0) |
2000 | return rc; |
2001 | |
2002 | /* save IMR value */ |
2003 | switch (imr_mem) { |
2004 | case 0: |
2005 | priv->imr_data[0].gain_x = imr_point.gain_x; |
2006 | priv->imr_data[0].phase_y = imr_point.phase_y; |
2007 | priv->imr_data[0].value = imr_point.value; |
2008 | break; |
2009 | case 1: |
2010 | priv->imr_data[1].gain_x = imr_point.gain_x; |
2011 | priv->imr_data[1].phase_y = imr_point.phase_y; |
2012 | priv->imr_data[1].value = imr_point.value; |
2013 | break; |
2014 | case 2: |
2015 | priv->imr_data[2].gain_x = imr_point.gain_x; |
2016 | priv->imr_data[2].phase_y = imr_point.phase_y; |
2017 | priv->imr_data[2].value = imr_point.value; |
2018 | break; |
2019 | case 3: |
2020 | priv->imr_data[3].gain_x = imr_point.gain_x; |
2021 | priv->imr_data[3].phase_y = imr_point.phase_y; |
2022 | priv->imr_data[3].value = imr_point.value; |
2023 | break; |
2024 | case 4: |
2025 | priv->imr_data[4].gain_x = imr_point.gain_x; |
2026 | priv->imr_data[4].phase_y = imr_point.phase_y; |
2027 | priv->imr_data[4].value = imr_point.value; |
2028 | break; |
2029 | default: |
2030 | priv->imr_data[4].gain_x = imr_point.gain_x; |
2031 | priv->imr_data[4].phase_y = imr_point.phase_y; |
2032 | priv->imr_data[4].value = imr_point.value; |
2033 | break; |
2034 | } |
2035 | |
2036 | return 0; |
2037 | } |
2038 | |
2039 | static int r820t_imr_callibrate(struct r820t_priv *priv) |
2040 | { |
2041 | int rc, i; |
2042 | int xtal_cap = 0; |
2043 | |
2044 | if (priv->init_done) |
2045 | return 0; |
2046 | |
2047 | /* Detect Xtal capacitance */ |
2048 | if ((priv->cfg->rafael_chip == CHIP_R820T) || |
2049 | (priv->cfg->rafael_chip == CHIP_R828S) || |
2050 | (priv->cfg->rafael_chip == CHIP_R820C)) { |
2051 | priv->xtal_cap_sel = XTAL_HIGH_CAP_0P; |
2052 | } else { |
2053 | /* Initialize registers */ |
2054 | rc = r820t_write(priv, 0x05, |
2055 | r820t_init_array, sizeof(r820t_init_array)); |
2056 | if (rc < 0) |
2057 | return rc; |
2058 | for (i = 0; i < 3; i++) { |
2059 | rc = r820t_xtal_check(priv); |
2060 | if (rc < 0) |
2061 | return rc; |
2062 | if (!i || rc > xtal_cap) |
2063 | xtal_cap = rc; |
2064 | } |
2065 | priv->xtal_cap_sel = xtal_cap; |
2066 | } |
2067 | |
2068 | /* |
2069 | * Disables IMR calibration. That emulates the same behaviour |
2070 | * as what is done by rtl-sdr userspace library. Useful for testing |
2071 | */ |
2072 | if (no_imr_cal) { |
2073 | priv->init_done = true; |
2074 | |
2075 | return 0; |
2076 | } |
2077 | |
2078 | /* Initialize registers */ |
2079 | rc = r820t_write(priv, 0x05, |
2080 | r820t_init_array, sizeof(r820t_init_array)); |
2081 | if (rc < 0) |
2082 | return rc; |
2083 | |
2084 | rc = r820t_imr_prepare(priv); |
2085 | if (rc < 0) |
2086 | return rc; |
2087 | |
2088 | rc = r820t_imr(priv, 3, true); |
2089 | if (rc < 0) |
2090 | return rc; |
2091 | rc = r820t_imr(priv, 1, false); |
2092 | if (rc < 0) |
2093 | return rc; |
2094 | rc = r820t_imr(priv, 0, false); |
2095 | if (rc < 0) |
2096 | return rc; |
2097 | rc = r820t_imr(priv, 2, false); |
2098 | if (rc < 0) |
2099 | return rc; |
2100 | rc = r820t_imr(priv, 4, false); |
2101 | if (rc < 0) |
2102 | return rc; |
2103 | |
2104 | priv->init_done = true; |
2105 | priv->imr_done = true; |
2106 | |
2107 | return 0; |
2108 | } |
2109 | |
2110 | #if 0 |
2111 | /* Not used, for now */ |
2112 | static int r820t_gpio(struct r820t_priv *priv, bool enable) |
2113 | { |
2114 | return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01); |
2115 | } |
2116 | #endif |
2117 | |
2118 | /* |
2119 | * r820t frontend operations and tuner attach code |
2120 | * |
2121 | * All driver locks and i2c control are only in this part of the code |
2122 | */ |
2123 | |
2124 | static int r820t_init(struct dvb_frontend *fe) |
2125 | { |
2126 | struct r820t_priv *priv = fe->tuner_priv; |
2127 | int rc; |
2128 | |
2129 | tuner_dbg("%s:\n" , __func__); |
2130 | |
2131 | mutex_lock(&priv->lock); |
2132 | if (fe->ops.i2c_gate_ctrl) |
2133 | fe->ops.i2c_gate_ctrl(fe, 1); |
2134 | |
2135 | rc = r820t_imr_callibrate(priv); |
2136 | if (rc < 0) |
2137 | goto err; |
2138 | |
2139 | /* Initialize registers */ |
2140 | rc = r820t_write(priv, 0x05, |
2141 | r820t_init_array, sizeof(r820t_init_array)); |
2142 | |
2143 | err: |
2144 | if (fe->ops.i2c_gate_ctrl) |
2145 | fe->ops.i2c_gate_ctrl(fe, 0); |
2146 | mutex_unlock(&priv->lock); |
2147 | |
2148 | if (rc < 0) |
2149 | tuner_dbg("%s: failed=%d\n" , __func__, rc); |
2150 | return rc; |
2151 | } |
2152 | |
2153 | static int r820t_sleep(struct dvb_frontend *fe) |
2154 | { |
2155 | struct r820t_priv *priv = fe->tuner_priv; |
2156 | int rc; |
2157 | |
2158 | tuner_dbg("%s:\n" , __func__); |
2159 | |
2160 | mutex_lock(&priv->lock); |
2161 | if (fe->ops.i2c_gate_ctrl) |
2162 | fe->ops.i2c_gate_ctrl(fe, 1); |
2163 | |
2164 | rc = r820t_standby(priv); |
2165 | |
2166 | if (fe->ops.i2c_gate_ctrl) |
2167 | fe->ops.i2c_gate_ctrl(fe, 0); |
2168 | mutex_unlock(&priv->lock); |
2169 | |
2170 | tuner_dbg("%s: failed=%d\n" , __func__, rc); |
2171 | return rc; |
2172 | } |
2173 | |
2174 | static int r820t_set_analog_freq(struct dvb_frontend *fe, |
2175 | struct analog_parameters *p) |
2176 | { |
2177 | struct r820t_priv *priv = fe->tuner_priv; |
2178 | unsigned bw; |
2179 | int rc; |
2180 | |
2181 | tuner_dbg("%s called\n" , __func__); |
2182 | |
2183 | /* if std is not defined, choose one */ |
2184 | if (!p->std) |
2185 | p->std = V4L2_STD_MN; |
2186 | |
2187 | if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC)) |
2188 | bw = 6; |
2189 | else |
2190 | bw = 8; |
2191 | |
2192 | mutex_lock(&priv->lock); |
2193 | if (fe->ops.i2c_gate_ctrl) |
2194 | fe->ops.i2c_gate_ctrl(fe, 1); |
2195 | |
2196 | rc = generic_set_freq(fe, 62500l * p->frequency, bw, |
2197 | V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED); |
2198 | |
2199 | if (fe->ops.i2c_gate_ctrl) |
2200 | fe->ops.i2c_gate_ctrl(fe, 0); |
2201 | mutex_unlock(&priv->lock); |
2202 | |
2203 | return rc; |
2204 | } |
2205 | |
2206 | static int r820t_set_params(struct dvb_frontend *fe) |
2207 | { |
2208 | struct r820t_priv *priv = fe->tuner_priv; |
2209 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
2210 | int rc; |
2211 | unsigned bw; |
2212 | |
2213 | tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n" , |
2214 | __func__, c->delivery_system, c->frequency, c->bandwidth_hz); |
2215 | |
2216 | mutex_lock(&priv->lock); |
2217 | if (fe->ops.i2c_gate_ctrl) |
2218 | fe->ops.i2c_gate_ctrl(fe, 1); |
2219 | |
2220 | bw = (c->bandwidth_hz + 500000) / 1000000; |
2221 | if (!bw) |
2222 | bw = 8; |
2223 | |
2224 | rc = generic_set_freq(fe, c->frequency, bw, |
2225 | V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system); |
2226 | |
2227 | if (fe->ops.i2c_gate_ctrl) |
2228 | fe->ops.i2c_gate_ctrl(fe, 0); |
2229 | mutex_unlock(&priv->lock); |
2230 | |
2231 | if (rc) |
2232 | tuner_dbg("%s: failed=%d\n" , __func__, rc); |
2233 | return rc; |
2234 | } |
2235 | |
2236 | static int r820t_signal(struct dvb_frontend *fe, u16 *strength) |
2237 | { |
2238 | struct r820t_priv *priv = fe->tuner_priv; |
2239 | int rc = 0; |
2240 | |
2241 | mutex_lock(&priv->lock); |
2242 | if (fe->ops.i2c_gate_ctrl) |
2243 | fe->ops.i2c_gate_ctrl(fe, 1); |
2244 | |
2245 | if (priv->has_lock) { |
2246 | rc = r820t_read_gain(priv); |
2247 | if (rc < 0) |
2248 | goto err; |
2249 | |
2250 | /* A higher gain at LNA means a lower signal strength */ |
2251 | *strength = (45 - rc) << 4 | 0xff; |
2252 | if (*strength == 0xff) |
2253 | *strength = 0; |
2254 | } else { |
2255 | *strength = 0; |
2256 | } |
2257 | |
2258 | err: |
2259 | if (fe->ops.i2c_gate_ctrl) |
2260 | fe->ops.i2c_gate_ctrl(fe, 0); |
2261 | mutex_unlock(&priv->lock); |
2262 | |
2263 | tuner_dbg("%s: %s, gain=%d strength=%d\n" , |
2264 | __func__, |
2265 | priv->has_lock ? "PLL locked" : "no signal" , |
2266 | rc, *strength); |
2267 | |
2268 | return 0; |
2269 | } |
2270 | |
2271 | static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
2272 | { |
2273 | struct r820t_priv *priv = fe->tuner_priv; |
2274 | |
2275 | tuner_dbg("%s:\n" , __func__); |
2276 | |
2277 | *frequency = priv->int_freq; |
2278 | |
2279 | return 0; |
2280 | } |
2281 | |
2282 | static void r820t_release(struct dvb_frontend *fe) |
2283 | { |
2284 | struct r820t_priv *priv = fe->tuner_priv; |
2285 | |
2286 | tuner_dbg("%s:\n" , __func__); |
2287 | |
2288 | mutex_lock(&r820t_list_mutex); |
2289 | |
2290 | if (priv) |
2291 | hybrid_tuner_release_state(priv); |
2292 | |
2293 | mutex_unlock(&r820t_list_mutex); |
2294 | |
2295 | fe->tuner_priv = NULL; |
2296 | } |
2297 | |
2298 | static const struct dvb_tuner_ops r820t_tuner_ops = { |
2299 | .info = { |
2300 | .name = "Rafael Micro R820T" , |
2301 | .frequency_min_hz = 42 * MHz, |
2302 | .frequency_max_hz = 1002 * MHz, |
2303 | }, |
2304 | .init = r820t_init, |
2305 | .release = r820t_release, |
2306 | .sleep = r820t_sleep, |
2307 | .set_params = r820t_set_params, |
2308 | .set_analog_params = r820t_set_analog_freq, |
2309 | .get_if_frequency = r820t_get_if_frequency, |
2310 | .get_rf_strength = r820t_signal, |
2311 | }; |
2312 | |
2313 | struct dvb_frontend *r820t_attach(struct dvb_frontend *fe, |
2314 | struct i2c_adapter *i2c, |
2315 | const struct r820t_config *cfg) |
2316 | { |
2317 | struct r820t_priv *priv; |
2318 | int rc = -ENODEV; |
2319 | u8 data[5]; |
2320 | int instance; |
2321 | |
2322 | mutex_lock(&r820t_list_mutex); |
2323 | |
2324 | instance = hybrid_tuner_request_state(struct r820t_priv, priv, |
2325 | hybrid_tuner_instance_list, |
2326 | i2c, cfg->i2c_addr, |
2327 | "r820t" ); |
2328 | switch (instance) { |
2329 | case 0: |
2330 | /* memory allocation failure */ |
2331 | goto err_no_gate; |
2332 | case 1: |
2333 | /* new tuner instance */ |
2334 | priv->cfg = cfg; |
2335 | |
2336 | mutex_init(&priv->lock); |
2337 | |
2338 | fe->tuner_priv = priv; |
2339 | break; |
2340 | case 2: |
2341 | /* existing tuner instance */ |
2342 | fe->tuner_priv = priv; |
2343 | break; |
2344 | } |
2345 | |
2346 | if (fe->ops.i2c_gate_ctrl) |
2347 | fe->ops.i2c_gate_ctrl(fe, 1); |
2348 | |
2349 | /* check if the tuner is there */ |
2350 | rc = r820t_read(priv, 0x00, data, sizeof(data)); |
2351 | if (rc < 0) |
2352 | goto err; |
2353 | |
2354 | rc = r820t_sleep(fe); |
2355 | if (rc < 0) |
2356 | goto err; |
2357 | |
2358 | tuner_info("Rafael Micro r820t successfully identified\n" ); |
2359 | |
2360 | if (fe->ops.i2c_gate_ctrl) |
2361 | fe->ops.i2c_gate_ctrl(fe, 0); |
2362 | |
2363 | mutex_unlock(&r820t_list_mutex); |
2364 | |
2365 | memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, |
2366 | sizeof(struct dvb_tuner_ops)); |
2367 | |
2368 | return fe; |
2369 | err: |
2370 | if (fe->ops.i2c_gate_ctrl) |
2371 | fe->ops.i2c_gate_ctrl(fe, 0); |
2372 | |
2373 | err_no_gate: |
2374 | mutex_unlock(&r820t_list_mutex); |
2375 | |
2376 | pr_info("%s: failed=%d\n" , __func__, rc); |
2377 | r820t_release(fe); |
2378 | return NULL; |
2379 | } |
2380 | EXPORT_SYMBOL_GPL(r820t_attach); |
2381 | |
2382 | MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver" ); |
2383 | MODULE_AUTHOR("Mauro Carvalho Chehab" ); |
2384 | MODULE_LICENSE("GPL v2" ); |
2385 | |