2 * Rafael Micro R820T driver
4 * Copyright (C) 2013 Mauro Carvalho Chehab <mchehab@redhat.com>
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
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.
18 * After locking, the original driver seems to have some routines to
19 * improve reception. This was not implemented here yet.
21 * RF Gain set/get is not implemented.
23 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation; either version 2 of the License, or
26 * (at your option) any later version.
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 * GNU General Public License for more details.
35 #include <linux/videodev2.h>
36 #include <linux/mutex.h>
37 #include <linux/slab.h>
38 #include <linux/bitrev.h>
40 #include "tuner-i2c.h"
44 * FIXME: I think that there are only 32 registers, but better safe than
45 * sorry. After finishing the driver, we may review it.
47 #define REG_SHADOW_START 5
55 module_param(debug, int, 0644);
56 MODULE_PARM_DESC(debug, "enable verbose debug messages");
58 static int no_imr_cal;
59 module_param(no_imr_cal, int, 0444);
60 MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init");
64 * enums and structures
75 struct r820t_sect_type {
82 struct list_head hybrid_tuner_instance_list;
83 const struct r820t_config *cfg;
84 struct tuner_i2c_props i2c_props;
89 enum xtal_cap_value xtal_cap_sel;
96 struct r820t_sect_type imr_data[NUM_IMR];
98 /* Store current mode */
100 enum v4l2_tuner_type type;
105 struct r820t_freq_range {
113 u8 imr_mem; /* Not used, currently */
116 #define VCO_POWER_REF 0x02
117 #define DIP_FREQ 32000000
123 static LIST_HEAD(hybrid_tuner_instance_list);
124 static DEFINE_MUTEX(r820t_list_mutex);
126 /* Those initial values start from REG_SHADOW_START */
127 static const u8 r820t_init_array[NUM_REGS] = {
128 0x83, 0x32, 0x75, /* 05 to 07 */
129 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
130 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
131 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
132 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
133 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
134 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
137 /* Tuner frequency ranges */
138 static const struct r820t_freq_range freq_ranges[] = {
141 .open_d = 0x08, /* low */
142 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
143 .tf_c = 0xdf, /* R27[7:0] band2,band0 */
144 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
149 .freq = 50, /* Start freq, in MHz */
150 .open_d = 0x08, /* low */
151 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
152 .tf_c = 0xbe, /* R27[7:0] band4,band1 */
153 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
158 .freq = 55, /* Start freq, in MHz */
159 .open_d = 0x08, /* low */
160 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
161 .tf_c = 0x8b, /* R27[7:0] band7,band4 */
162 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
167 .freq = 60, /* Start freq, in MHz */
168 .open_d = 0x08, /* low */
169 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
170 .tf_c = 0x7b, /* R27[7:0] band8,band4 */
171 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
176 .freq = 65, /* Start freq, in MHz */
177 .open_d = 0x08, /* low */
178 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
179 .tf_c = 0x69, /* R27[7:0] band9,band6 */
180 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
185 .freq = 70, /* Start freq, in MHz */
186 .open_d = 0x08, /* low */
187 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
188 .tf_c = 0x58, /* R27[7:0] band10,band7 */
189 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
194 .freq = 75, /* Start freq, in MHz */
195 .open_d = 0x00, /* high */
196 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
197 .tf_c = 0x44, /* R27[7:0] band11,band11 */
198 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
203 .freq = 80, /* Start freq, in MHz */
204 .open_d = 0x00, /* high */
205 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
206 .tf_c = 0x44, /* R27[7:0] band11,band11 */
207 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
212 .freq = 90, /* Start freq, in MHz */
213 .open_d = 0x00, /* high */
214 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
215 .tf_c = 0x34, /* R27[7:0] band12,band11 */
216 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
221 .freq = 100, /* Start freq, in MHz */
222 .open_d = 0x00, /* high */
223 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
224 .tf_c = 0x34, /* R27[7:0] band12,band11 */
225 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
230 .freq = 110, /* Start freq, in MHz */
231 .open_d = 0x00, /* high */
232 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
233 .tf_c = 0x24, /* R27[7:0] band13,band11 */
234 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
239 .freq = 120, /* Start freq, in MHz */
240 .open_d = 0x00, /* high */
241 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
242 .tf_c = 0x24, /* R27[7:0] band13,band11 */
243 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
248 .freq = 140, /* Start freq, in MHz */
249 .open_d = 0x00, /* high */
250 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
251 .tf_c = 0x14, /* R27[7:0] band14,band11 */
252 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
257 .freq = 180, /* Start freq, in MHz */
258 .open_d = 0x00, /* high */
259 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
260 .tf_c = 0x13, /* R27[7:0] band14,band12 */
261 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
266 .freq = 220, /* Start freq, in MHz */
267 .open_d = 0x00, /* high */
268 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
269 .tf_c = 0x13, /* R27[7:0] band14,band12 */
270 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
275 .freq = 250, /* Start freq, in MHz */
276 .open_d = 0x00, /* high */
277 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
278 .tf_c = 0x11, /* R27[7:0] highest,highest */
279 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
284 .freq = 280, /* Start freq, in MHz */
285 .open_d = 0x00, /* high */
286 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
287 .tf_c = 0x00, /* R27[7:0] highest,highest */
288 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
293 .freq = 310, /* Start freq, in MHz */
294 .open_d = 0x00, /* high */
295 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
296 .tf_c = 0x00, /* R27[7:0] highest,highest */
297 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
302 .freq = 450, /* Start freq, in MHz */
303 .open_d = 0x00, /* high */
304 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
305 .tf_c = 0x00, /* R27[7:0] highest,highest */
306 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
311 .freq = 588, /* Start freq, in MHz */
312 .open_d = 0x00, /* high */
313 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
314 .tf_c = 0x00, /* R27[7:0] highest,highest */
315 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
320 .freq = 650, /* Start freq, in MHz */
321 .open_d = 0x00, /* high */
322 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
323 .tf_c = 0x00, /* R27[7:0] highest,highest */
324 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
331 static int r820t_xtal_capacitor[][2] = {
332 { 0x0b, XTAL_LOW_CAP_30P },
333 { 0x02, XTAL_LOW_CAP_20P },
334 { 0x01, XTAL_LOW_CAP_10P },
335 { 0x00, XTAL_LOW_CAP_0P },
336 { 0x10, XTAL_HIGH_CAP_0P },
340 * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
341 * input power, for raw results see:
342 * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
345 static const int r820t_lna_gain_steps[] = {
346 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
349 static const int r820t_mixer_gain_steps[] = {
350 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
354 * I2C read/write code and shadow registers logic
356 static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
359 int r = reg - REG_SHADOW_START;
370 tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n",
371 __func__, r + REG_SHADOW_START, len, len, val);
373 memcpy(&priv->regs[r], val, len);
376 static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val,
379 int rc, size, pos = 0;
381 /* Store the shadow registers */
382 shadow_store(priv, reg, val, len);
385 if (len > priv->cfg->max_i2c_msg_len - 1)
386 size = priv->cfg->max_i2c_msg_len - 1;
390 /* Fill I2C buffer */
392 memcpy(&priv->buf[1], &val[pos], size);
394 rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1);
395 if (rc != size + 1) {
396 tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n",
397 __func__, rc, reg, size, size, &priv->buf[1]);
402 tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n",
403 __func__, reg, size, size, &priv->buf[1]);
413 static int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val)
415 return r820t_write(priv, reg, &val, 1);
418 static int r820t_read_cache_reg(struct r820t_priv *priv, int reg)
420 reg -= REG_SHADOW_START;
422 if (reg >= 0 && reg < NUM_REGS)
423 return priv->regs[reg];
428 static int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
431 int rc = r820t_read_cache_reg(priv, reg);
436 val = (rc & ~bit_mask) | (val & bit_mask);
438 return r820t_write(priv, reg, &val, 1);
441 static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
444 u8 *p = &priv->buf[1];
448 rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len);
450 tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n",
451 __func__, rc, reg, len, len, p);
457 /* Copy data to the output buffer */
458 for (i = 0; i < len; i++)
459 val[i] = bitrev8(p[i]);
461 tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
462 __func__, reg, len, len, val);
471 static int r820t_set_mux(struct r820t_priv *priv, u32 freq)
473 const struct r820t_freq_range *range;
475 u8 val, reg08, reg09;
477 /* Get the proper frequency range */
478 freq = freq / 1000000;
479 for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
480 if (freq < freq_ranges[i + 1].freq)
483 range = &freq_ranges[i];
485 tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq);
488 rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08);
493 rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
498 rc = r820t_write_reg(priv, 0x1b, range->tf_c);
502 /* XTAL CAP & Drive */
503 switch (priv->xtal_cap_sel) {
504 case XTAL_LOW_CAP_30P:
505 case XTAL_LOW_CAP_20P:
506 val = range->xtal_cap20p | 0x08;
508 case XTAL_LOW_CAP_10P:
509 val = range->xtal_cap10p | 0x08;
511 case XTAL_HIGH_CAP_0P:
512 val = range->xtal_cap0p | 0x00;
515 case XTAL_LOW_CAP_0P:
516 val = range->xtal_cap0p | 0x08;
519 rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b);
523 if (priv->imr_done) {
524 reg08 = priv->imr_data[range->imr_mem].gain_x;
525 reg09 = priv->imr_data[range->imr_mem].phase_y;
530 rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f);
534 rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f);
539 static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type,
544 unsigned sleep_time = 10000;
545 u32 vco_fra; /* VCO contribution by SDM (kHz) */
546 u32 vco_min = 1770000;
547 u32 vco_max = vco_min * 2;
555 u8 ni, si, nint, vco_fine_tune, val;
558 /* Frequency in kHz */
560 pll_ref = priv->cfg->xtal / 1000;
563 /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */
564 if ((priv->cfg->rafael_chip == CHIP_R620D) ||
565 (priv->cfg->rafael_chip == CHIP_R828D) ||
566 (priv->cfg->rafael_chip == CHIP_R828)) {
567 /* ref set refdiv2, reffreq = Xtal/2 on ATV application */
568 if (type != V4L2_TUNER_DIGITAL_TV) {
574 if (priv->cfg->xtal > 24000000) {
581 rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10);
585 /* set pll autotune = 128kHz */
586 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
590 /* set VCO current = 100 */
591 rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0);
595 /* Calculate divider */
596 while (mix_div <= 64) {
597 if (((freq * mix_div) >= vco_min) &&
598 ((freq * mix_div) < vco_max)) {
600 while (div_buf > 2) {
601 div_buf = div_buf >> 1;
606 mix_div = mix_div << 1;
609 rc = r820t_read(priv, 0x00, data, sizeof(data));
613 vco_fine_tune = (data[4] & 0x30) >> 4;
615 if (vco_fine_tune > VCO_POWER_REF)
616 div_num = div_num - 1;
617 else if (vco_fine_tune < VCO_POWER_REF)
618 div_num = div_num + 1;
620 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
624 vco_freq = freq * mix_div;
625 nint = vco_freq / (2 * pll_ref);
626 vco_fra = vco_freq - 2 * pll_ref * nint;
628 /* boundary spur prevention */
629 if (vco_fra < pll_ref / 64) {
631 } else if (vco_fra > pll_ref * 127 / 64) {
634 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
635 vco_fra = pll_ref * 127 / 128;
636 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
637 vco_fra = pll_ref * 129 / 128;
641 tuner_info("No valid PLL values for %u kHz!\n", freq);
645 ni = (nint - 13) / 4;
646 si = nint - 4 * ni - 13;
648 rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
658 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
663 while (vco_fra > 1) {
664 if (vco_fra > (2 * pll_ref / n_sdm)) {
665 sdm = sdm + 32768 / (n_sdm / 2);
666 vco_fra = vco_fra - 2 * pll_ref / n_sdm;
673 tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n",
674 freq, pll_ref, refdiv2 ? " / 2" : "", sdm);
676 rc = r820t_write_reg(priv, 0x16, sdm >> 8);
679 rc = r820t_write_reg(priv, 0x15, sdm & 0xff);
683 for (i = 0; i < 2; i++) {
684 usleep_range(sleep_time, sleep_time + 1000);
686 /* Check if PLL has locked */
687 rc = r820t_read(priv, 0x00, data, 3);
694 /* Didn't lock. Increase VCO current */
695 rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0);
701 if (!(data[2] & 0x40)) {
702 priv->has_lock = false;
706 priv->has_lock = true;
707 tuner_dbg("tuner has lock at frequency %d kHz\n", freq);
709 /* set pll autotune = 8kHz */
710 rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08);
715 static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
716 enum v4l2_tuner_type type,
721 u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
722 u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
724 tuner_dbg("adjusting tuner parameters for the standard\n");
728 if ((freq == 506000000) || (freq == 666000000) ||
729 (freq == 818000000)) {
730 mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
731 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
732 cp_cur = 0x28; /* 101, 0.2 */
733 div_buf_cur = 0x20; /* 10, 200u */
735 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
736 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
737 cp_cur = 0x38; /* 111, auto */
738 div_buf_cur = 0x30; /* 11, 150u */
740 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
741 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
742 air_cable1_in = 0x00;
746 filter_cur = 0x40; /* 10, low */
749 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
750 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
751 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
752 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
753 air_cable1_in = 0x00;
757 cp_cur = 0x38; /* 111, auto */
758 div_buf_cur = 0x30; /* 11, 150u */
759 filter_cur = 0x40; /* 10, low */
762 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
763 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
764 lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
765 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
766 air_cable1_in = 0x00;
770 cp_cur = 0x38; /* 111, auto */
771 div_buf_cur = 0x30; /* 11, 150u */
772 filter_cur = 0x40; /* 10, low */
774 default: /* DVB-T 8M */
775 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
776 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
777 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
778 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
779 air_cable1_in = 0x00;
783 cp_cur = 0x38; /* 111, auto */
784 div_buf_cur = 0x30; /* 11, 150u */
785 filter_cur = 0x40; /* 10, low */
789 if (priv->cfg->use_diplexer &&
790 ((priv->cfg->rafael_chip == CHIP_R820T) ||
791 (priv->cfg->rafael_chip == CHIP_R828S) ||
792 (priv->cfg->rafael_chip == CHIP_R820C))) {
794 air_cable1_in = 0x00;
796 air_cable1_in = 0x60;
800 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
803 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
806 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
809 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
813 /* Air-IN only for Astrometa */
814 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
817 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
821 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
824 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
827 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
831 * Original driver initializes regs 0x05 and 0x06 with the
832 * same value again on this point. Probably, it is just an
840 tuner_dbg("adjusting LNA parameters\n");
841 if (type != V4L2_TUNER_ANALOG_TV) {
842 /* LNA TOP: lowest */
843 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
848 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
852 /* 0: PRE_DECT off */
853 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
858 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
864 /* write LNA TOP = 3 */
865 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
870 * write discharge mode
871 * FIXME: IMHO, the mask here is wrong, but it matches
872 * what's there at the original driver
874 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
878 /* LNA discharge current */
879 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
884 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
889 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
894 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
899 * write discharge mode
900 * FIXME: IMHO, the mask here is wrong, but it matches
901 * what's there at the original driver
903 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
907 /* LNA discharge current */
908 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
912 /* agc clk 1Khz, external det1 cap 1u */
913 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
917 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
924 static int r820t_set_tv_standard(struct r820t_priv *priv,
926 enum v4l2_tuner_type type,
927 v4l2_std_id std, u32 delsys)
931 u32 if_khz, filt_cal_lo;
933 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
934 u8 lt_att, flt_ext_widest, polyfil_cur;
935 bool need_calibration;
937 tuner_dbg("selecting the delivery system\n");
939 if (delsys == SYS_ISDBT) {
942 filt_gain = 0x10; /* +3db, 6mhz on */
943 img_r = 0x00; /* image negative */
944 filt_q = 0x10; /* r10[4]:low q(1'b1) */
945 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
946 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
947 loop_through = 0x00; /* r5[7], lt on */
948 lt_att = 0x00; /* r31[7], lt att enable */
949 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
950 polyfil_cur = 0x60; /* r25[6:5]:min */
954 filt_cal_lo = 56000; /* 52000->56000 */
955 filt_gain = 0x10; /* +3db, 6mhz on */
956 img_r = 0x00; /* image negative */
957 filt_q = 0x10; /* r10[4]:low q(1'b1) */
958 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
959 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
960 loop_through = 0x00; /* r5[7], lt on */
961 lt_att = 0x00; /* r31[7], lt att enable */
962 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
963 polyfil_cur = 0x60; /* r25[6:5]:min */
964 } else if (bw == 7) {
967 * There are two 7 MHz tables defined on the original
968 * driver, but just the second one seems to be visible
969 * by rtl2832. Keep this one here commented, as it
970 * might be needed in the future
975 filt_gain = 0x10; /* +3db, 6mhz on */
976 img_r = 0x00; /* image negative */
977 filt_q = 0x10; /* r10[4]:low q(1'b1) */
978 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
979 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
980 loop_through = 0x00; /* r5[7], lt on */
981 lt_att = 0x00; /* r31[7], lt att enable */
982 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
983 polyfil_cur = 0x60; /* r25[6:5]:min */
985 /* 7 MHz, second table */
988 filt_gain = 0x10; /* +3db, 6mhz on */
989 img_r = 0x00; /* image negative */
990 filt_q = 0x10; /* r10[4]:low q(1'b1) */
991 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
992 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
993 loop_through = 0x00; /* r5[7], lt on */
994 lt_att = 0x00; /* r31[7], lt att enable */
995 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
996 polyfil_cur = 0x60; /* r25[6:5]:min */
1000 filt_gain = 0x10; /* +3db, 6mhz on */
1001 img_r = 0x00; /* image negative */
1002 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1003 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1004 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1005 loop_through = 0x00; /* r5[7], lt on */
1006 lt_att = 0x00; /* r31[7], lt att enable */
1007 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1008 polyfil_cur = 0x60; /* r25[6:5]:min */
1012 /* Initialize the shadow registers */
1013 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1015 /* Init Flag & Xtal_check Result */
1017 val = 1 | priv->xtal_cap_sel << 1;
1020 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1025 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1029 /* for LT Gain test */
1030 if (type != V4L2_TUNER_ANALOG_TV) {
1031 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1034 usleep_range(1000, 2000);
1036 priv->int_freq = if_khz * 1000;
1038 /* Check if standard changed. If so, filter calibration is needed */
1039 if (type != priv->type)
1040 need_calibration = true;
1041 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1042 need_calibration = true;
1043 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1044 ((delsys != priv->delsys) || bw != priv->bw))
1045 need_calibration = true;
1047 need_calibration = false;
1049 if (need_calibration) {
1050 tuner_dbg("calibrating the tuner\n");
1051 for (i = 0; i < 2; i++) {
1053 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1057 /* set cali clk =on */
1058 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1062 /* X'tal cap 0pF for PLL */
1063 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1067 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
1068 if (rc < 0 || !priv->has_lock)
1072 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1076 usleep_range(1000, 2000);
1079 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1083 /* set cali clk =off */
1084 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1088 /* Check if calibration worked */
1089 rc = r820t_read(priv, 0x00, data, sizeof(data));
1093 priv->fil_cal_code = data[4] & 0x0f;
1094 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1098 if (priv->fil_cal_code == 0x0f)
1099 priv->fil_cal_code = 0;
1102 rc = r820t_write_reg_mask(priv, 0x0a,
1103 filt_q | priv->fil_cal_code, 0x1f);
1107 /* Set BW, Filter_gain, & HP corner */
1108 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
1114 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1118 /* Set filt_3dB, V6MHz */
1119 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1123 /* channel filter extension */
1124 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1129 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1133 /* Loop through attenuation */
1134 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1138 /* filter extension widest */
1139 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1143 /* RF poly filter current */
1144 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1148 /* Store current standard. If it changes, re-calibrate the tuner */
1149 priv->delsys = delsys;
1157 static int r820t_read_gain(struct r820t_priv *priv)
1162 rc = r820t_read(priv, 0x00, data, sizeof(data));
1166 return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
1170 /* FIXME: This routine requires more testing */
1171 static int r820t_set_gain_mode(struct r820t_priv *priv,
1172 bool set_manual_gain,
1177 if (set_manual_gain) {
1178 int i, total_gain = 0;
1179 uint8_t mix_index = 0, lna_index = 0;
1183 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1187 /* Mixer auto off */
1188 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1192 rc = r820t_read(priv, 0x00, data, sizeof(data));
1196 /* set fixed VGA gain for now (16.3 dB) */
1197 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1201 for (i = 0; i < 15; i++) {
1202 if (total_gain >= gain)
1205 total_gain += r820t_lna_gain_steps[++lna_index];
1207 if (total_gain >= gain)
1210 total_gain += r820t_mixer_gain_steps[++mix_index];
1214 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1218 /* set Mixer gain */
1219 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1224 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
1229 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
1233 /* set fixed VGA gain for now (26.5 dB) */
1234 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1243 static int generic_set_freq(struct dvb_frontend *fe,
1244 u32 freq /* in HZ */,
1246 enum v4l2_tuner_type type,
1247 v4l2_std_id std, u32 delsys)
1249 struct r820t_priv *priv = fe->tuner_priv;
1253 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1256 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1260 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1261 lo_freq = freq - priv->int_freq;
1263 lo_freq = freq + priv->int_freq;
1265 rc = r820t_set_mux(priv, lo_freq);
1269 rc = r820t_set_pll(priv, type, lo_freq);
1270 if (rc < 0 || !priv->has_lock)
1273 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1277 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1278 __func__, freq, r820t_read_gain(priv));
1283 tuner_dbg("%s: failed=%d\n", __func__, rc);
1288 * r820t standby logic
1291 static int r820t_standby(struct r820t_priv *priv)
1295 /* If device was not initialized yet, don't need to standby */
1296 if (!priv->init_done)
1299 rc = r820t_write_reg(priv, 0x06, 0xb1);
1302 rc = r820t_write_reg(priv, 0x05, 0x03);
1305 rc = r820t_write_reg(priv, 0x07, 0x3a);
1308 rc = r820t_write_reg(priv, 0x08, 0x40);
1311 rc = r820t_write_reg(priv, 0x09, 0xc0);
1314 rc = r820t_write_reg(priv, 0x0a, 0x36);
1317 rc = r820t_write_reg(priv, 0x0c, 0x35);
1320 rc = r820t_write_reg(priv, 0x0f, 0x68);
1323 rc = r820t_write_reg(priv, 0x11, 0x03);
1326 rc = r820t_write_reg(priv, 0x17, 0xf4);
1329 rc = r820t_write_reg(priv, 0x19, 0x0c);
1331 /* Force initial calibration */
1338 * r820t device init logic
1341 static int r820t_xtal_check(struct r820t_priv *priv)
1346 /* Initialize the shadow registers */
1347 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1349 /* cap 30pF & Drive Low */
1350 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1354 /* set pll autotune = 128kHz */
1355 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1359 /* set manual initial reg = 111111; */
1360 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1365 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1369 /* Try several xtal capacitor alternatives */
1370 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1371 rc = r820t_write_reg_mask(priv, 0x10,
1372 r820t_xtal_capacitor[i][0], 0x1b);
1376 usleep_range(5000, 6000);
1378 rc = r820t_read(priv, 0x00, data, sizeof(data));
1381 if ((!data[2]) & 0x40)
1384 val = data[2] & 0x3f;
1386 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1393 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1396 return r820t_xtal_capacitor[i][1];
1399 static int r820t_imr_prepare(struct r820t_priv *priv)
1403 /* Initialize the shadow registers */
1404 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1406 /* lna off (air-in off) */
1407 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1411 /* mixer gain mode = manual */
1412 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1416 /* filter corner = lowest */
1417 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1421 /* filter bw=+2cap, hp=5M */
1422 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1426 /* adc=on, vga code mode, gain = 26.5dB */
1427 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1432 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1436 /* ring power = on */
1437 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1441 /* from ring = ring pll in */
1442 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1446 /* sw_pdect = det3 */
1447 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1452 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1457 static int r820t_multi_read(struct r820t_priv *priv)
1460 u8 data[2], min = 0, max = 255, sum = 0;
1462 usleep_range(5000, 6000);
1464 for (i = 0; i < 6; i++) {
1465 rc = r820t_read(priv, 0x00, data, sizeof(data));
1477 rc = sum - max - min;
1482 static int r820t_imr_cross(struct r820t_priv *priv,
1483 struct r820t_sect_type iq_point[3],
1486 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1487 struct r820t_sect_type tmp;
1491 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1492 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1498 for (i = 0; i < 5; i++) {
1501 cross[i].gain_x = reg08;
1502 cross[i].phase_y = reg09;
1505 cross[i].gain_x = reg08; /* 0 */
1506 cross[i].phase_y = reg09 + 1; /* Q-1 */
1509 cross[i].gain_x = reg08; /* 0 */
1510 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1513 cross[i].gain_x = reg08 + 1; /* Q-1 */
1514 cross[i].phase_y = reg09;
1517 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1518 cross[i].phase_y = reg09;
1521 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1525 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1529 rc = r820t_multi_read(priv);
1533 cross[i].value = rc;
1535 if (cross[i].value < tmp.value)
1536 memcpy(&tmp, &cross[i], sizeof(tmp));
1539 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1542 iq_point[0] = cross[0];
1543 iq_point[1] = cross[1];
1544 iq_point[2] = cross[2];
1545 } else { /* (0,0) or x-direction */
1548 iq_point[0] = cross[0];
1549 iq_point[1] = cross[3];
1550 iq_point[2] = cross[4];
1555 static void r820t_compre_cor(struct r820t_sect_type iq[3])
1559 for (i = 3; i > 0; i--) {
1560 if (iq[0].value > iq[i - 1].value)
1561 swap(iq[0], iq[i - 1]);
1565 static int r820t_compre_step(struct r820t_priv *priv,
1566 struct r820t_sect_type iq[3], u8 reg)
1569 struct r820t_sect_type tmp;
1572 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1574 * new < min => update to min and continue
1578 /* min value already saved in iq[0] */
1579 tmp.phase_y = iq[0].phase_y;
1580 tmp.gain_x = iq[0].gain_x;
1582 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1583 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1589 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1593 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1597 rc = r820t_multi_read(priv);
1602 if (tmp.value <= iq[0].value) {
1603 iq[0].gain_x = tmp.gain_x;
1604 iq[0].phase_y = tmp.phase_y;
1605 iq[0].value = tmp.value;
1615 static int r820t_iq_tree(struct r820t_priv *priv,
1616 struct r820t_sect_type iq[3],
1617 u8 fix_val, u8 var_val, u8 fix_reg)
1623 * record IMC results by input gain/phase location then adjust
1624 * gain or phase positive 1 step and negtive 1 step,
1625 * both record results
1628 if (fix_reg == 0x08)
1633 for (i = 0; i < 3; i++) {
1634 rc = r820t_write_reg(priv, fix_reg, fix_val);
1638 rc = r820t_write_reg(priv, var_reg, var_val);
1642 rc = r820t_multi_read(priv);
1647 if (fix_reg == 0x08) {
1648 iq[i].gain_x = fix_val;
1649 iq[i].phase_y = var_val;
1651 iq[i].phase_y = fix_val;
1652 iq[i].gain_x = var_val;
1655 if (i == 0) { /* try right-side point */
1657 } else if (i == 1) { /* try left-side point */
1658 /* if absolute location is 1, change I/Q direction */
1659 if ((var_val & 0x1f) < 0x02) {
1660 tmp = 2 - (var_val & 0x1f);
1662 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1663 if (var_val & 0x20) {
1667 var_val |= 0x20 | tmp;
1678 static int r820t_section(struct r820t_priv *priv,
1679 struct r820t_sect_type *iq_point)
1682 struct r820t_sect_type compare_iq[3], compare_bet[3];
1684 /* Try X-1 column and save min result to compare_bet[0] */
1685 if (!(iq_point->gain_x & 0x1f))
1686 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1688 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1689 compare_iq[0].phase_y = iq_point->phase_y;
1692 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1693 compare_iq[0].phase_y, 0x08);
1697 r820t_compre_cor(compare_iq);
1699 compare_bet[0] = compare_iq[0];
1701 /* Try X column and save min result to compare_bet[1] */
1702 compare_iq[0].gain_x = iq_point->gain_x;
1703 compare_iq[0].phase_y = iq_point->phase_y;
1705 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1706 compare_iq[0].phase_y, 0x08);
1710 r820t_compre_cor(compare_iq);
1712 compare_bet[1] = compare_iq[0];
1714 /* Try X+1 column and save min result to compare_bet[2] */
1715 if ((iq_point->gain_x & 0x1f) == 0x00)
1716 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1718 compare_iq[0].gain_x = iq_point->gain_x + 1;
1719 compare_iq[0].phase_y = iq_point->phase_y;
1721 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1722 compare_iq[0].phase_y, 0x08);
1726 r820t_compre_cor(compare_iq);
1728 compare_bet[2] = compare_iq[0];
1730 r820t_compre_cor(compare_bet);
1732 *iq_point = compare_bet[0];
1737 static int r820t_vga_adjust(struct r820t_priv *priv)
1742 /* increase vga power to let image significant */
1743 for (vga_count = 12; vga_count < 16; vga_count++) {
1744 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1748 usleep_range(10000, 11000);
1750 rc = r820t_multi_read(priv);
1761 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1763 struct r820t_sect_type compare_iq[3];
1765 u8 x_direction = 0; /* 1:x, 0:y */
1766 u8 dir_reg, other_reg;
1768 r820t_vga_adjust(priv);
1770 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1774 if (x_direction == 1) {
1782 /* compare and find min of 3 points. determine i/q direction */
1783 r820t_compre_cor(compare_iq);
1785 /* increase step to find min value of this direction */
1786 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1790 /* the other direction */
1791 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1792 compare_iq[0].phase_y, dir_reg);
1796 /* compare and find min of 3 points. determine i/q direction */
1797 r820t_compre_cor(compare_iq);
1799 /* increase step to find min value on this direction */
1800 rc = r820t_compre_step(priv, compare_iq, other_reg);
1804 /* check 3 points again */
1805 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1806 compare_iq[0].phase_y, other_reg);
1810 r820t_compre_cor(compare_iq);
1812 /* section-9 check */
1813 rc = r820t_section(priv, compare_iq);
1815 *iq_pont = compare_iq[0];
1817 /* reset gain/phase control setting */
1818 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1822 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1827 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1831 r820t_vga_adjust(priv);
1834 * search surrounding points from previous point
1835 * try (x-1), (x), (x+1) columns, and find min IMR result point
1837 rc = r820t_section(priv, iq_pont);
1844 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1846 struct r820t_sect_type imr_point;
1848 u32 ring_vco, ring_freq, ring_ref;
1850 int reg18, reg19, reg1f;
1852 if (priv->cfg->xtal > 24000000)
1853 ring_ref = priv->cfg->xtal / 2;
1855 ring_ref = priv->cfg->xtal;
1857 for (n = 0; n < 16; n++) {
1858 if ((16 + n) * 8 * ring_ref >= 3100000) {
1863 /* n_ring not found */
1868 reg18 = r820t_read_cache_reg(priv, 0x18);
1869 reg19 = r820t_read_cache_reg(priv, 0x19);
1870 reg1f = r820t_read_cache_reg(priv, 0x1f);
1872 reg18 &= 0xf0; /* set ring[3:0] */
1875 ring_vco = (16 + n_ring) * 8 * ring_ref;
1877 reg18 &= 0xdf; /* clear ring_se23 */
1878 reg19 &= 0xfc; /* clear ring_seldiv */
1879 reg1f &= 0xfc; /* clear ring_att */
1883 ring_freq = ring_vco / 48;
1884 reg18 |= 0x20; /* ring_se23 = 1 */
1885 reg19 |= 0x03; /* ring_seldiv = 3 */
1886 reg1f |= 0x02; /* ring_att 10 */
1889 ring_freq = ring_vco / 16;
1890 reg18 |= 0x00; /* ring_se23 = 0 */
1891 reg19 |= 0x02; /* ring_seldiv = 2 */
1892 reg1f |= 0x00; /* pw_ring 00 */
1895 ring_freq = ring_vco / 8;
1896 reg18 |= 0x00; /* ring_se23 = 0 */
1897 reg19 |= 0x01; /* ring_seldiv = 1 */
1898 reg1f |= 0x03; /* pw_ring 11 */
1901 ring_freq = ring_vco / 6;
1902 reg18 |= 0x20; /* ring_se23 = 1 */
1903 reg19 |= 0x00; /* ring_seldiv = 0 */
1904 reg1f |= 0x03; /* pw_ring 11 */
1907 ring_freq = ring_vco / 4;
1908 reg18 |= 0x00; /* ring_se23 = 0 */
1909 reg19 |= 0x00; /* ring_seldiv = 0 */
1910 reg1f |= 0x01; /* pw_ring 01 */
1913 ring_freq = ring_vco / 4;
1914 reg18 |= 0x00; /* ring_se23 = 0 */
1915 reg19 |= 0x00; /* ring_seldiv = 0 */
1916 reg1f |= 0x01; /* pw_ring 01 */
1921 /* write pw_ring, n_ring, ringdiv2 registers */
1923 /* n_ring, ring_se23 */
1924 rc = r820t_write_reg(priv, 0x18, reg18);
1929 rc = r820t_write_reg(priv, 0x19, reg19);
1934 rc = r820t_write_reg(priv, 0x1f, reg1f);
1938 /* mux input freq ~ rf_in freq */
1939 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1943 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1944 (ring_freq - 5300) * 1000);
1945 if (!priv->has_lock)
1951 rc = r820t_iq(priv, &imr_point);
1953 imr_point.gain_x = priv->imr_data[3].gain_x;
1954 imr_point.phase_y = priv->imr_data[3].phase_y;
1955 imr_point.value = priv->imr_data[3].value;
1957 rc = r820t_f_imr(priv, &imr_point);
1962 /* save IMR value */
1965 priv->imr_data[0].gain_x = imr_point.gain_x;
1966 priv->imr_data[0].phase_y = imr_point.phase_y;
1967 priv->imr_data[0].value = imr_point.value;
1970 priv->imr_data[1].gain_x = imr_point.gain_x;
1971 priv->imr_data[1].phase_y = imr_point.phase_y;
1972 priv->imr_data[1].value = imr_point.value;
1975 priv->imr_data[2].gain_x = imr_point.gain_x;
1976 priv->imr_data[2].phase_y = imr_point.phase_y;
1977 priv->imr_data[2].value = imr_point.value;
1980 priv->imr_data[3].gain_x = imr_point.gain_x;
1981 priv->imr_data[3].phase_y = imr_point.phase_y;
1982 priv->imr_data[3].value = imr_point.value;
1985 priv->imr_data[4].gain_x = imr_point.gain_x;
1986 priv->imr_data[4].phase_y = imr_point.phase_y;
1987 priv->imr_data[4].value = imr_point.value;
1990 priv->imr_data[4].gain_x = imr_point.gain_x;
1991 priv->imr_data[4].phase_y = imr_point.phase_y;
1992 priv->imr_data[4].value = imr_point.value;
1999 static int r820t_imr_callibrate(struct r820t_priv *priv)
2004 if (priv->init_done)
2007 /* Detect Xtal capacitance */
2008 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2009 (priv->cfg->rafael_chip == CHIP_R828S) ||
2010 (priv->cfg->rafael_chip == CHIP_R820C)) {
2011 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2013 /* Initialize registers */
2014 rc = r820t_write(priv, 0x05,
2015 r820t_init_array, sizeof(r820t_init_array));
2018 for (i = 0; i < 3; i++) {
2019 rc = r820t_xtal_check(priv);
2022 if (!i || rc > xtal_cap)
2025 priv->xtal_cap_sel = xtal_cap;
2029 * Disables IMR callibration. That emulates the same behaviour
2030 * as what is done by rtl-sdr userspace library. Useful for testing
2033 priv->init_done = true;
2038 /* Initialize registers */
2039 rc = r820t_write(priv, 0x05,
2040 r820t_init_array, sizeof(r820t_init_array));
2044 rc = r820t_imr_prepare(priv);
2048 rc = r820t_imr(priv, 3, true);
2051 rc = r820t_imr(priv, 1, false);
2054 rc = r820t_imr(priv, 0, false);
2057 rc = r820t_imr(priv, 2, false);
2060 rc = r820t_imr(priv, 4, false);
2064 priv->init_done = true;
2065 priv->imr_done = true;
2071 /* Not used, for now */
2072 static int r820t_gpio(struct r820t_priv *priv, bool enable)
2074 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2079 * r820t frontend operations and tuner attach code
2081 * All driver locks and i2c control are only in this part of the code
2084 static int r820t_init(struct dvb_frontend *fe)
2086 struct r820t_priv *priv = fe->tuner_priv;
2089 tuner_dbg("%s:\n", __func__);
2091 mutex_lock(&priv->lock);
2092 if (fe->ops.i2c_gate_ctrl)
2093 fe->ops.i2c_gate_ctrl(fe, 1);
2095 rc = r820t_imr_callibrate(priv);
2099 /* Initialize registers */
2100 rc = r820t_write(priv, 0x05,
2101 r820t_init_array, sizeof(r820t_init_array));
2104 if (fe->ops.i2c_gate_ctrl)
2105 fe->ops.i2c_gate_ctrl(fe, 0);
2106 mutex_unlock(&priv->lock);
2109 tuner_dbg("%s: failed=%d\n", __func__, rc);
2113 static int r820t_sleep(struct dvb_frontend *fe)
2115 struct r820t_priv *priv = fe->tuner_priv;
2118 tuner_dbg("%s:\n", __func__);
2120 mutex_lock(&priv->lock);
2121 if (fe->ops.i2c_gate_ctrl)
2122 fe->ops.i2c_gate_ctrl(fe, 1);
2124 rc = r820t_standby(priv);
2126 if (fe->ops.i2c_gate_ctrl)
2127 fe->ops.i2c_gate_ctrl(fe, 0);
2128 mutex_unlock(&priv->lock);
2130 tuner_dbg("%s: failed=%d\n", __func__, rc);
2134 static int r820t_set_analog_freq(struct dvb_frontend *fe,
2135 struct analog_parameters *p)
2137 struct r820t_priv *priv = fe->tuner_priv;
2141 tuner_dbg("%s called\n", __func__);
2143 /* if std is not defined, choose one */
2145 p->std = V4L2_STD_MN;
2147 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2152 mutex_lock(&priv->lock);
2153 if (fe->ops.i2c_gate_ctrl)
2154 fe->ops.i2c_gate_ctrl(fe, 1);
2156 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2157 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2159 if (fe->ops.i2c_gate_ctrl)
2160 fe->ops.i2c_gate_ctrl(fe, 0);
2161 mutex_unlock(&priv->lock);
2166 static int r820t_set_params(struct dvb_frontend *fe)
2168 struct r820t_priv *priv = fe->tuner_priv;
2169 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2173 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2174 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2176 mutex_lock(&priv->lock);
2177 if (fe->ops.i2c_gate_ctrl)
2178 fe->ops.i2c_gate_ctrl(fe, 1);
2180 bw = (c->bandwidth_hz + 500000) / 1000000;
2184 rc = generic_set_freq(fe, c->frequency, bw,
2185 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2187 if (fe->ops.i2c_gate_ctrl)
2188 fe->ops.i2c_gate_ctrl(fe, 0);
2189 mutex_unlock(&priv->lock);
2192 tuner_dbg("%s: failed=%d\n", __func__, rc);
2196 static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2198 struct r820t_priv *priv = fe->tuner_priv;
2201 mutex_lock(&priv->lock);
2202 if (fe->ops.i2c_gate_ctrl)
2203 fe->ops.i2c_gate_ctrl(fe, 1);
2205 if (priv->has_lock) {
2206 rc = r820t_read_gain(priv);
2210 /* A higher gain at LNA means a lower signal strength */
2211 *strength = (45 - rc) << 4 | 0xff;
2212 if (*strength == 0xff)
2219 if (fe->ops.i2c_gate_ctrl)
2220 fe->ops.i2c_gate_ctrl(fe, 0);
2221 mutex_unlock(&priv->lock);
2223 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2225 priv->has_lock ? "PLL locked" : "no signal",
2231 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2233 struct r820t_priv *priv = fe->tuner_priv;
2235 tuner_dbg("%s:\n", __func__);
2237 *frequency = priv->int_freq;
2242 static int r820t_release(struct dvb_frontend *fe)
2244 struct r820t_priv *priv = fe->tuner_priv;
2246 tuner_dbg("%s:\n", __func__);
2248 mutex_lock(&r820t_list_mutex);
2251 hybrid_tuner_release_state(priv);
2253 mutex_unlock(&r820t_list_mutex);
2255 fe->tuner_priv = NULL;
2257 kfree(fe->tuner_priv);
2262 static const struct dvb_tuner_ops r820t_tuner_ops = {
2264 .name = "Rafael Micro R820T",
2265 .frequency_min = 42000000,
2266 .frequency_max = 1002000000,
2269 .release = r820t_release,
2270 .sleep = r820t_sleep,
2271 .set_params = r820t_set_params,
2272 .set_analog_params = r820t_set_analog_freq,
2273 .get_if_frequency = r820t_get_if_frequency,
2274 .get_rf_strength = r820t_signal,
2277 struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
2278 struct i2c_adapter *i2c,
2279 const struct r820t_config *cfg)
2281 struct r820t_priv *priv;
2286 mutex_lock(&r820t_list_mutex);
2288 instance = hybrid_tuner_request_state(struct r820t_priv, priv,
2289 hybrid_tuner_instance_list,
2294 /* memory allocation failure */
2298 /* new tuner instance */
2301 mutex_init(&priv->lock);
2303 fe->tuner_priv = priv;
2306 /* existing tuner instance */
2307 fe->tuner_priv = priv;
2311 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, sizeof(r820t_tuner_ops));
2313 if (fe->ops.i2c_gate_ctrl)
2314 fe->ops.i2c_gate_ctrl(fe, 1);
2316 /* check if the tuner is there */
2317 rc = r820t_read(priv, 0x00, data, sizeof(data));
2321 rc = r820t_sleep(fe);
2325 tuner_info("Rafael Micro r820t successfully identified\n");
2327 fe->tuner_priv = priv;
2328 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2329 sizeof(struct dvb_tuner_ops));
2331 if (fe->ops.i2c_gate_ctrl)
2332 fe->ops.i2c_gate_ctrl(fe, 0);
2334 mutex_unlock(&r820t_list_mutex);
2338 if (fe->ops.i2c_gate_ctrl)
2339 fe->ops.i2c_gate_ctrl(fe, 0);
2342 mutex_unlock(&r820t_list_mutex);
2344 tuner_info("%s: failed=%d\n", __func__, rc);
2348 EXPORT_SYMBOL_GPL(r820t_attach);
2350 MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
2351 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
2352 MODULE_LICENSE("GPL");