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path: root/drivers/media/tuners/r820t.c
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Diffstat (limited to 'drivers/media/tuners/r820t.c')
-rw-r--r--drivers/media/tuners/r820t.c2355
1 files changed, 2355 insertions, 0 deletions
diff --git a/drivers/media/tuners/r820t.c b/drivers/media/tuners/r820t.c
new file mode 100644
index 00000000000..4835021aa3b
--- /dev/null
+++ b/drivers/media/tuners/r820t.c
@@ -0,0 +1,2355 @@
+/*
+ * Rafael Micro R820T driver
+ *
+ * Copyright (C) 2013 Mauro Carvalho Chehab <mchehab@redhat.com>
+ *
+ * This driver was written from scratch, based on an existing driver
+ * that it is part of rtl-sdr git tree, released under GPLv2:
+ * https://groups.google.com/forum/#!topic/ultra-cheap-sdr/Y3rBEOFtHug
+ * https://github.com/n1gp/gr-baz
+ *
+ * From what I understood from the threads, the original driver was converted
+ * to userspace from a Realtek tree. I couldn't find the original tree.
+ * However, the original driver look awkward on my eyes. So, I decided to
+ * write a new version from it from the scratch, while trying to reproduce
+ * everything found there.
+ *
+ * TODO:
+ * After locking, the original driver seems to have some routines to
+ * improve reception. This was not implemented here yet.
+ *
+ * RF Gain set/get is not implemented.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/videodev2.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/bitrev.h>
+
+#include "tuner-i2c.h"
+#include "r820t.h"
+
+/*
+ * FIXME: I think that there are only 32 registers, but better safe than
+ * sorry. After finishing the driver, we may review it.
+ */
+#define REG_SHADOW_START 5
+#define NUM_REGS 27
+#define NUM_IMR 5
+#define IMR_TRIAL 9
+
+#define VER_NUM 49
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+static int no_imr_cal;
+module_param(no_imr_cal, int, 0444);
+MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init");
+
+
+/*
+ * enums and structures
+ */
+
+enum xtal_cap_value {
+ XTAL_LOW_CAP_30P = 0,
+ XTAL_LOW_CAP_20P,
+ XTAL_LOW_CAP_10P,
+ XTAL_LOW_CAP_0P,
+ XTAL_HIGH_CAP_0P
+};
+
+struct r820t_sect_type {
+ u8 phase_y;
+ u8 gain_x;
+ u16 value;
+};
+
+struct r820t_priv {
+ struct list_head hybrid_tuner_instance_list;
+ const struct r820t_config *cfg;
+ struct tuner_i2c_props i2c_props;
+ struct mutex lock;
+
+ u8 regs[NUM_REGS];
+ u8 buf[NUM_REGS + 1];
+ enum xtal_cap_value xtal_cap_sel;
+ u16 pll; /* kHz */
+ u32 int_freq;
+ u8 fil_cal_code;
+ bool imr_done;
+ bool has_lock;
+ bool init_done;
+ struct r820t_sect_type imr_data[NUM_IMR];
+
+ /* Store current mode */
+ u32 delsys;
+ enum v4l2_tuner_type type;
+ v4l2_std_id std;
+ u32 bw; /* in MHz */
+};
+
+struct r820t_freq_range {
+ u32 freq;
+ u8 open_d;
+ u8 rf_mux_ploy;
+ u8 tf_c;
+ u8 xtal_cap20p;
+ u8 xtal_cap10p;
+ u8 xtal_cap0p;
+ u8 imr_mem; /* Not used, currently */
+};
+
+#define VCO_POWER_REF 0x02
+#define DIP_FREQ 32000000
+
+/*
+ * Static constants
+ */
+
+static LIST_HEAD(hybrid_tuner_instance_list);
+static DEFINE_MUTEX(r820t_list_mutex);
+
+/* Those initial values start from REG_SHADOW_START */
+static const u8 r820t_init_array[NUM_REGS] = {
+ 0x83, 0x32, 0x75, /* 05 to 07 */
+ 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
+ 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
+ 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
+ 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
+ 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
+ 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
+};
+
+/* Tuner frequency ranges */
+static const struct r820t_freq_range freq_ranges[] = {
+ {
+ .freq = 0,
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0xdf, /* R27[7:0] band2,band0 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 50, /* Start freq, in MHz */
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0xbe, /* R27[7:0] band4,band1 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 55, /* Start freq, in MHz */
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x8b, /* R27[7:0] band7,band4 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 60, /* Start freq, in MHz */
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x7b, /* R27[7:0] band8,band4 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 65, /* Start freq, in MHz */
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x69, /* R27[7:0] band9,band6 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 70, /* Start freq, in MHz */
+ .open_d = 0x08, /* low */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x58, /* R27[7:0] band10,band7 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 75, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x44, /* R27[7:0] band11,band11 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 80, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x44, /* R27[7:0] band11,band11 */
+ .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 90, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x34, /* R27[7:0] band12,band11 */
+ .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 100, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x34, /* R27[7:0] band12,band11 */
+ .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 0,
+ }, {
+ .freq = 110, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x24, /* R27[7:0] band13,band11 */
+ .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 1,
+ }, {
+ .freq = 120, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x24, /* R27[7:0] band13,band11 */
+ .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 1,
+ }, {
+ .freq = 140, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x14, /* R27[7:0] band14,band11 */
+ .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
+ .xtal_cap10p = 0x01,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 1,
+ }, {
+ .freq = 180, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x13, /* R27[7:0] band14,band12 */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 1,
+ }, {
+ .freq = 220, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x13, /* R27[7:0] band14,band12 */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 2,
+ }, {
+ .freq = 250, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x11, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 2,
+ }, {
+ .freq = 280, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
+ .tf_c = 0x00, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 2,
+ }, {
+ .freq = 310, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
+ .tf_c = 0x00, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 2,
+ }, {
+ .freq = 450, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
+ .tf_c = 0x00, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 3,
+ }, {
+ .freq = 588, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
+ .tf_c = 0x00, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 3,
+ }, {
+ .freq = 650, /* Start freq, in MHz */
+ .open_d = 0x00, /* high */
+ .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
+ .tf_c = 0x00, /* R27[7:0] highest,highest */
+ .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
+ .xtal_cap10p = 0x00,
+ .xtal_cap0p = 0x00,
+ .imr_mem = 4,
+ }
+};
+
+static int r820t_xtal_capacitor[][2] = {
+ { 0x0b, XTAL_LOW_CAP_30P },
+ { 0x02, XTAL_LOW_CAP_20P },
+ { 0x01, XTAL_LOW_CAP_10P },
+ { 0x00, XTAL_LOW_CAP_0P },
+ { 0x10, XTAL_HIGH_CAP_0P },
+};
+
+/*
+ * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
+ * input power, for raw results see:
+ * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
+ */
+
+static const int r820t_lna_gain_steps[] = {
+ 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
+};
+
+static const int r820t_mixer_gain_steps[] = {
+ 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
+};
+
+/*
+ * I2C read/write code and shadow registers logic
+ */
+static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
+ int len)
+{
+ int r = reg - REG_SHADOW_START;
+
+ if (r < 0) {
+ len += r;
+ r = 0;
+ }
+ if (len <= 0)
+ return;
+ if (len > NUM_REGS)
+ len = NUM_REGS;
+
+ tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n",
+ __func__, r + REG_SHADOW_START, len, len, val);
+
+ memcpy(&priv->regs[r], val, len);
+}
+
+static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val,
+ int len)
+{
+ int rc, size, pos = 0;
+
+ /* Store the shadow registers */
+ shadow_store(priv, reg, val, len);
+
+ do {
+ if (len > priv->cfg->max_i2c_msg_len - 1)
+ size = priv->cfg->max_i2c_msg_len - 1;
+ else
+ size = len;
+
+ /* Fill I2C buffer */
+ priv->buf[0] = reg;
+ memcpy(&priv->buf[1], &val[pos], size);
+
+ rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1);
+ if (rc != size + 1) {
+ tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n",
+ __func__, rc, reg, size, size, &priv->buf[1]);
+ if (rc < 0)
+ return rc;
+ return -EREMOTEIO;
+ }
+ tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n",
+ __func__, reg, size, size, &priv->buf[1]);
+
+ reg += size;
+ len -= size;
+ pos += size;
+ } while (len > 0);
+
+ return 0;
+}
+
+static int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val)
+{
+ return r820t_write(priv, reg, &val, 1);
+}
+
+static int r820t_read_cache_reg(struct r820t_priv *priv, int reg)
+{
+ reg -= REG_SHADOW_START;
+
+ if (reg >= 0 && reg < NUM_REGS)
+ return priv->regs[reg];
+ else
+ return -EINVAL;
+}
+
+static int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
+ u8 bit_mask)
+{
+ int rc = r820t_read_cache_reg(priv, reg);
+
+ if (rc < 0)
+ return rc;
+
+ val = (rc & ~bit_mask) | (val & bit_mask);
+
+ return r820t_write(priv, reg, &val, 1);
+}
+
+static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
+{
+ int rc, i;
+ u8 *p = &priv->buf[1];
+
+ priv->buf[0] = reg;
+
+ rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len);
+ if (rc != len) {
+ tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n",
+ __func__, rc, reg, len, len, p);
+ if (rc < 0)
+ return rc;
+ return -EREMOTEIO;
+ }
+
+ /* Copy data to the output buffer */
+ for (i = 0; i < len; i++)
+ val[i] = bitrev8(p[i]);
+
+ tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
+ __func__, reg, len, len, val);
+
+ return 0;
+}
+
+/*
+ * r820t tuning logic
+ */
+
+static int r820t_set_mux(struct r820t_priv *priv, u32 freq)
+{
+ const struct r820t_freq_range *range;
+ int i, rc;
+ u8 val, reg08, reg09;
+
+ /* Get the proper frequency range */
+ freq = freq / 1000000;
+ for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
+ if (freq < freq_ranges[i + 1].freq)
+ break;
+ }
+ range = &freq_ranges[i];
+
+ tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq);
+
+ /* Open Drain */
+ rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08);
+ if (rc < 0)
+ return rc;
+
+ /* RF_MUX,Polymux */
+ rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
+ if (rc < 0)
+ return rc;
+
+ /* TF BAND */
+ rc = r820t_write_reg(priv, 0x1b, range->tf_c);
+ if (rc < 0)
+ return rc;
+
+ /* XTAL CAP & Drive */
+ switch (priv->xtal_cap_sel) {
+ case XTAL_LOW_CAP_30P:
+ case XTAL_LOW_CAP_20P:
+ val = range->xtal_cap20p | 0x08;
+ break;
+ case XTAL_LOW_CAP_10P:
+ val = range->xtal_cap10p | 0x08;
+ break;
+ case XTAL_HIGH_CAP_0P:
+ val = range->xtal_cap0p | 0x00;
+ break;
+ default:
+ case XTAL_LOW_CAP_0P:
+ val = range->xtal_cap0p | 0x08;
+ break;
+ }
+ rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b);
+ if (rc < 0)
+ return rc;
+
+ if (priv->imr_done) {
+ reg08 = priv->imr_data[range->imr_mem].gain_x;
+ reg09 = priv->imr_data[range->imr_mem].phase_y;
+ } else {
+ reg08 = 0;
+ reg09 = 0;
+ }
+ rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f);
+
+ return rc;
+}
+
+static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type,
+ u32 freq)
+{
+ u32 vco_freq;
+ int rc, i;
+ unsigned sleep_time = 10000;
+ u32 vco_fra; /* VCO contribution by SDM (kHz) */
+ u32 vco_min = 1770000;
+ u32 vco_max = vco_min * 2;
+ u32 pll_ref;
+ u16 n_sdm = 2;
+ u16 sdm = 0;
+ u8 mix_div = 2;
+ u8 div_buf = 0;
+ u8 div_num = 0;
+ u8 refdiv2 = 0;
+ u8 ni, si, nint, vco_fine_tune, val;
+ u8 data[5];
+
+ /* Frequency in kHz */
+ freq = freq / 1000;
+ pll_ref = priv->cfg->xtal / 1000;
+
+#if 0
+ /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */
+ if ((priv->cfg->rafael_chip == CHIP_R620D) ||
+ (priv->cfg->rafael_chip == CHIP_R828D) ||
+ (priv->cfg->rafael_chip == CHIP_R828)) {
+ /* ref set refdiv2, reffreq = Xtal/2 on ATV application */
+ if (type != V4L2_TUNER_DIGITAL_TV) {
+ pll_ref /= 2;
+ refdiv2 = 0x10;
+ sleep_time = 20000;
+ }
+ } else {
+ if (priv->cfg->xtal > 24000000) {
+ pll_ref /= 2;
+ refdiv2 = 0x10;
+ }
+ }
+#endif
+
+ rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* set pll autotune = 128kHz */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
+ if (rc < 0)
+ return rc;
+
+ /* set VCO current = 100 */
+ rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0);
+ if (rc < 0)
+ return rc;
+
+ /* Calculate divider */
+ while (mix_div <= 64) {
+ if (((freq * mix_div) >= vco_min) &&
+ ((freq * mix_div) < vco_max)) {
+ div_buf = mix_div;
+ while (div_buf > 2) {
+ div_buf = div_buf >> 1;
+ div_num++;
+ }
+ break;
+ }
+ mix_div = mix_div << 1;
+ }
+
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+
+ vco_fine_tune = (data[4] & 0x30) >> 4;
+
+ if (vco_fine_tune > VCO_POWER_REF)
+ div_num = div_num - 1;
+ else if (vco_fine_tune < VCO_POWER_REF)
+ div_num = div_num + 1;
+
+ rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
+ if (rc < 0)
+ return rc;
+
+ vco_freq = freq * mix_div;
+ nint = vco_freq / (2 * pll_ref);
+ vco_fra = vco_freq - 2 * pll_ref * nint;
+
+ /* boundary spur prevention */
+ if (vco_fra < pll_ref / 64) {
+ vco_fra = 0;
+ } else if (vco_fra > pll_ref * 127 / 64) {
+ vco_fra = 0;
+ nint++;
+ } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
+ vco_fra = pll_ref * 127 / 128;
+ } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
+ vco_fra = pll_ref * 129 / 128;
+ }
+
+ if (nint > 63) {
+ tuner_info("No valid PLL values for %u kHz!\n", freq);
+ return -EINVAL;
+ }
+
+ ni = (nint - 13) / 4;
+ si = nint - 4 * ni - 13;
+
+ rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
+ if (rc < 0)
+ return rc;
+
+ /* pw_sdm */
+ if (!vco_fra)
+ val = 0x08;
+ else
+ val = 0x00;
+
+ rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
+ if (rc < 0)
+ return rc;
+
+ /* sdm calculator */
+ while (vco_fra > 1) {
+ if (vco_fra > (2 * pll_ref / n_sdm)) {
+ sdm = sdm + 32768 / (n_sdm / 2);
+ vco_fra = vco_fra - 2 * pll_ref / n_sdm;
+ if (n_sdm >= 0x8000)
+ break;
+ }
+ n_sdm = n_sdm << 1;
+ }
+
+ tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n",
+ freq, pll_ref, refdiv2 ? " / 2" : "", sdm);
+
+ rc = r820t_write_reg(priv, 0x16, sdm >> 8);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x15, sdm & 0xff);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0; i < 2; i++) {
+ usleep_range(sleep_time, sleep_time + 1000);
+
+ /* Check if PLL has locked */
+ rc = r820t_read(priv, 0x00, data, 3);
+ if (rc < 0)
+ return rc;
+ if (data[2] & 0x40)
+ break;
+
+ if (!i) {
+ /* Didn't lock. Increase VCO current */
+ rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0);
+ if (rc < 0)
+ return rc;
+ }
+ }
+
+ if (!(data[2] & 0x40)) {
+ priv->has_lock = false;
+ return 0;
+ }
+
+ priv->has_lock = true;
+ tuner_dbg("tuner has lock at frequency %d kHz\n", freq);
+
+ /* set pll autotune = 8kHz */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08);
+
+ return rc;
+}
+
+static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
+ enum v4l2_tuner_type type,
+ v4l2_std_id std,
+ u32 delsys)
+{
+ int rc;
+ u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
+ u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
+
+ tuner_dbg("adjusting tuner parameters for the standard\n");
+
+ switch (delsys) {
+ case SYS_DVBT:
+ if ((freq == 506000000) || (freq == 666000000) ||
+ (freq == 818000000)) {
+ mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
+ lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
+ cp_cur = 0x28; /* 101, 0.2 */
+ div_buf_cur = 0x20; /* 10, 200u */
+ } else {
+ mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
+ lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
+ cp_cur = 0x38; /* 111, auto */
+ div_buf_cur = 0x30; /* 11, 150u */
+ }
+ lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
+ mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
+ air_cable1_in = 0x00;
+ cable2_in = 0x00;
+ pre_dect = 0x40;
+ lna_discharge = 14;
+ filter_cur = 0x40; /* 10, low */
+ break;
+ case SYS_DVBT2:
+ mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
+ lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
+ lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
+ mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
+ air_cable1_in = 0x00;
+ cable2_in = 0x00;
+ pre_dect = 0x40;
+ lna_discharge = 14;
+ cp_cur = 0x38; /* 111, auto */
+ div_buf_cur = 0x30; /* 11, 150u */
+ filter_cur = 0x40; /* 10, low */
+ break;
+ case SYS_ISDBT:
+ mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
+ lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
+ lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
+ mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
+ air_cable1_in = 0x00;
+ cable2_in = 0x00;
+ pre_dect = 0x40;
+ lna_discharge = 14;
+ cp_cur = 0x38; /* 111, auto */
+ div_buf_cur = 0x30; /* 11, 150u */
+ filter_cur = 0x40; /* 10, low */
+ break;
+ default: /* DVB-T 8M */
+ mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
+ lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
+ lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
+ mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
+ air_cable1_in = 0x00;
+ cable2_in = 0x00;
+ pre_dect = 0x40;
+ lna_discharge = 14;
+ cp_cur = 0x38; /* 111, auto */
+ div_buf_cur = 0x30; /* 11, 150u */
+ filter_cur = 0x40; /* 10, low */
+ break;
+ }
+
+ if (priv->cfg->use_diplexer &&
+ ((priv->cfg->rafael_chip == CHIP_R820T) ||
+ (priv->cfg->rafael_chip == CHIP_R828S) ||
+ (priv->cfg->rafael_chip == CHIP_R820C))) {
+ if (freq > DIP_FREQ)
+ air_cable1_in = 0x00;
+ else
+ air_cable1_in = 0x60;
+ cable2_in = 0x00;
+ }
+
+
+ if (priv->cfg->use_predetect) {
+ rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40);
+ if (rc < 0)
+ return rc;
+ }
+
+ rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
+ if (rc < 0)
+ return rc;
+
+ /* Air-IN only for Astrometa */
+ rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
+ if (rc < 0)
+ return rc;
+ /*
+ * Original driver initializes regs 0x05 and 0x06 with the
+ * same value again on this point. Probably, it is just an
+ * error there
+ */
+
+ /*
+ * Set LNA
+ */
+
+ tuner_dbg("adjusting LNA parameters\n");
+ if (type != V4L2_TUNER_ANALOG_TV) {
+ /* LNA TOP: lowest */
+ rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
+ if (rc < 0)
+ return rc;
+
+ /* 0: normal mode */
+ rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
+ if (rc < 0)
+ return rc;
+
+ /* 0: PRE_DECT off */
+ rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
+ if (rc < 0)
+ return rc;
+
+ /* agc clk 250hz */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
+ if (rc < 0)
+ return rc;
+
+ msleep(250);
+
+ /* write LNA TOP = 3 */
+ rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
+ if (rc < 0)
+ return rc;
+
+ /*
+ * write discharge mode
+ * FIXME: IMHO, the mask here is wrong, but it matches
+ * what's there at the original driver
+ */
+ rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
+ if (rc < 0)
+ return rc;
+
+ /* LNA discharge current */
+ rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
+ if (rc < 0)
+ return rc;
+
+ /* agc clk 60hz */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
+ if (rc < 0)
+ return rc;
+ } else {
+ /* PRE_DECT off */
+ rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
+ if (rc < 0)
+ return rc;
+
+ /* write LNA TOP */
+ rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
+ if (rc < 0)
+ return rc;
+
+ /*
+ * write discharge mode
+ * FIXME: IMHO, the mask here is wrong, but it matches
+ * what's there at the original driver
+ */
+ rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
+ if (rc < 0)
+ return rc;
+
+ /* LNA discharge current */
+ rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
+ if (rc < 0)
+ return rc;
+
+ /* agc clk 1Khz, external det1 cap 1u */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
+ if (rc < 0)
+ return rc;
+ }
+ return 0;
+}
+
+static int r820t_set_tv_standard(struct r820t_priv *priv,
+ unsigned bw,
+ enum v4l2_tuner_type type,
+ v4l2_std_id std, u32 delsys)
+
+{
+ int rc, i;
+ u32 if_khz, filt_cal_lo;
+ u8 data[5], val;
+ u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
+ u8 lt_att, flt_ext_widest, polyfil_cur;
+ bool need_calibration;
+
+ tuner_dbg("selecting the delivery system\n");
+
+ if (delsys == SYS_ISDBT) {
+ if_khz = 4063;
+ filt_cal_lo = 59000;
+ filt_gain = 0x10; /* +3db, 6mhz on */
+ img_r = 0x00; /* image negative */
+ filt_q = 0x10; /* r10[4]:low q(1'b1) */
+ hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
+ ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
+ loop_through = 0x00; /* r5[7], lt on */
+ lt_att = 0x00; /* r31[7], lt att enable */
+ flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
+ polyfil_cur = 0x60; /* r25[6:5]:min */
+ } else {
+ if (bw <= 6) {
+ if_khz = 3570;
+ filt_cal_lo = 56000; /* 52000->56000 */
+ filt_gain = 0x10; /* +3db, 6mhz on */
+ img_r = 0x00; /* image negative */
+ filt_q = 0x10; /* r10[4]:low q(1'b1) */
+ hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
+ ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
+ loop_through = 0x00; /* r5[7], lt on */
+ lt_att = 0x00; /* r31[7], lt att enable */
+ flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
+ polyfil_cur = 0x60; /* r25[6:5]:min */
+ } else if (bw == 7) {
+#if 0
+ /*
+ * There are two 7 MHz tables defined on the original
+ * driver, but just the second one seems to be visible
+ * by rtl2832. Keep this one here commented, as it
+ * might be needed in the future
+ */
+
+ if_khz = 4070;
+ filt_cal_lo = 60000;
+ filt_gain = 0x10; /* +3db, 6mhz on */
+ img_r = 0x00; /* image negative */
+ filt_q = 0x10; /* r10[4]:low q(1'b1) */
+ hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
+ ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
+ loop_through = 0x00; /* r5[7], lt on */
+ lt_att = 0x00; /* r31[7], lt att enable */
+ flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
+ polyfil_cur = 0x60; /* r25[6:5]:min */
+#endif
+ /* 7 MHz, second table */
+ if_khz = 4570;
+ filt_cal_lo = 63000;
+ filt_gain = 0x10; /* +3db, 6mhz on */
+ img_r = 0x00; /* image negative */
+ filt_q = 0x10; /* r10[4]:low q(1'b1) */
+ hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
+ ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
+ loop_through = 0x00; /* r5[7], lt on */
+ lt_att = 0x00; /* r31[7], lt att enable */
+ flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
+ polyfil_cur = 0x60; /* r25[6:5]:min */
+ } else {
+ if_khz = 4570;
+ filt_cal_lo = 68500;
+ filt_gain = 0x10; /* +3db, 6mhz on */
+ img_r = 0x00; /* image negative */
+ filt_q = 0x10; /* r10[4]:low q(1'b1) */
+ hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
+ ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
+ loop_through = 0x00; /* r5[7], lt on */
+ lt_att = 0x00; /* r31[7], lt att enable */
+ flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
+ polyfil_cur = 0x60; /* r25[6:5]:min */
+ }
+ }
+
+ /* Initialize the shadow registers */
+ memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
+
+ /* Init Flag & Xtal_check Result */
+ if (priv->imr_done)
+ val = 1 | priv->xtal_cap_sel << 1;
+ else
+ val = 0;
+ rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
+ if (rc < 0)
+ return rc;
+
+ /* version */
+ rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
+ if (rc < 0)
+ return rc;
+
+ /* for LT Gain test */
+ if (type != V4L2_TUNER_ANALOG_TV) {
+ rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
+ if (rc < 0)
+ return rc;
+ usleep_range(1000, 2000);
+ }
+ priv->int_freq = if_khz * 1000;
+
+ /* Check if standard changed. If so, filter calibration is needed */
+ if (type != priv->type)
+ need_calibration = true;
+ else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
+ need_calibration = true;
+ else if ((type == V4L2_TUNER_DIGITAL_TV) &&
+ ((delsys != priv->delsys) || bw != priv->bw))
+ need_calibration = true;
+ else
+ need_calibration = false;
+
+ if (need_calibration) {
+ tuner_dbg("calibrating the tuner\n");
+ for (i = 0; i < 2; i++) {
+ /* Set filt_cap */
+ rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
+ if (rc < 0)
+ return rc;
+
+ /* set cali clk =on */
+ rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
+ if (rc < 0)
+ return rc;
+
+ /* X'tal cap 0pF for PLL */
+ rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
+ if (rc < 0 || !priv->has_lock)
+ return rc;
+
+ /* Start Trigger */
+ rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
+ if (rc < 0)
+ return rc;
+
+ usleep_range(1000, 2000);
+
+ /* Stop Trigger */
+ rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* set cali clk =off */
+ rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
+ if (rc < 0)
+ return rc;
+
+ /* Check if calibration worked */
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+
+ priv->fil_cal_code = data[4] & 0x0f;
+ if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
+ break;
+ }
+ /* narrowest */
+ if (priv->fil_cal_code == 0x0f)
+ priv->fil_cal_code = 0;
+ }
+
+ rc = r820t_write_reg_mask(priv, 0x0a,
+ filt_q | priv->fil_cal_code, 0x1f);
+ if (rc < 0)
+ return rc;
+
+ /* Set BW, Filter_gain, & HP corner */
+ rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
+ if (rc < 0)
+ return rc;
+
+
+ /* Set Img_R */
+ rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
+ if (rc < 0)
+ return rc;
+
+ /* Set filt_3dB, V6MHz */
+ rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
+ if (rc < 0)
+ return rc;
+
+ /* channel filter extension */
+ rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
+ if (rc < 0)
+ return rc;
+
+ /* Loop through */
+ rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
+ if (rc < 0)
+ return rc;
+
+ /* Loop through attenuation */
+ rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
+ if (rc < 0)
+ return rc;
+
+ /* filter extension widest */
+ rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
+ if (rc < 0)
+ return rc;
+
+ /* RF poly filter current */
+ rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
+ if (rc < 0)
+ return rc;
+
+ /* Store current standard. If it changes, re-calibrate the tuner */
+ priv->delsys = delsys;
+ priv->type = type;
+ priv->std = std;
+ priv->bw = bw;
+
+ return 0;
+}
+
+static int r820t_read_gain(struct r820t_priv *priv)
+{
+ u8 data[4];
+ int rc;
+
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+
+ return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
+}
+
+#if 0
+/* FIXME: This routine requires more testing */
+static int r820t_set_gain_mode(struct r820t_priv *priv,
+ bool set_manual_gain,
+ int gain)
+{
+ int rc;
+
+ if (set_manual_gain) {
+ int i, total_gain = 0;
+ uint8_t mix_index = 0, lna_index = 0;
+ u8 data[4];
+
+ /* LNA auto off */
+ rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* Mixer auto off */
+ rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+
+ /* set fixed VGA gain for now (16.3 dB) */
+ rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0; i < 15; i++) {
+ if (total_gain >= gain)
+ break;
+
+ total_gain += r820t_lna_gain_steps[++lna_index];
+
+ if (total_gain >= gain)
+ break;
+
+ total_gain += r820t_mixer_gain_steps[++mix_index];
+ }
+
+ /* set LNA gain */
+ rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
+ if (rc < 0)
+ return rc;
+
+ /* set Mixer gain */
+ rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
+ if (rc < 0)
+ return rc;
+ } else {
+ /* LNA */
+ rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* Mixer */
+ rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* set fixed VGA gain for now (26.5 dB) */
+ rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
+ if (rc < 0)
+ return rc;
+ }
+
+ return 0;
+}
+#endif
+
+static int generic_set_freq(struct dvb_frontend *fe,
+ u32 freq /* in HZ */,
+ unsigned bw,
+ enum v4l2_tuner_type type,
+ v4l2_std_id std, u32 delsys)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ int rc = -EINVAL;
+ u32 lo_freq;
+
+ tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
+ freq / 1000, bw);
+
+ rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
+ if (rc < 0)
+ goto err;
+
+ if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
+ lo_freq = freq - priv->int_freq;
+ else
+ lo_freq = freq + priv->int_freq;
+
+ rc = r820t_set_mux(priv, lo_freq);
+ if (rc < 0)
+ goto err;
+
+ rc = r820t_set_pll(priv, type, lo_freq);
+ if (rc < 0 || !priv->has_lock)
+ goto err;
+
+ rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
+ if (rc < 0)
+ goto err;
+
+ tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
+ __func__, freq, r820t_read_gain(priv));
+
+err:
+
+ if (rc < 0)
+ tuner_dbg("%s: failed=%d\n", __func__, rc);
+ return rc;
+}
+
+/*
+ * r820t standby logic
+ */
+
+static int r820t_standby(struct r820t_priv *priv)
+{
+ int rc;
+
+ /* If device was not initialized yet, don't need to standby */
+ if (!priv->init_done)
+ return 0;
+
+ rc = r820t_write_reg(priv, 0x06, 0xb1);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x05, 0x03);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x07, 0x3a);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x08, 0x40);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x09, 0xc0);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x0a, 0x36);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x0c, 0x35);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x0f, 0x68);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x11, 0x03);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x17, 0xf4);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg(priv, 0x19, 0x0c);
+
+ /* Force initial calibration */
+ priv->type = -1;
+
+ return rc;
+}
+
+/*
+ * r820t device init logic
+ */
+
+static int r820t_xtal_check(struct r820t_priv *priv)
+{
+ int rc, i;
+ u8 data[3], val;
+
+ /* Initialize the shadow registers */
+ memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
+
+ /* cap 30pF & Drive Low */
+ rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
+ if (rc < 0)
+ return rc;
+
+ /* set pll autotune = 128kHz */
+ rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
+ if (rc < 0)
+ return rc;
+
+ /* set manual initial reg = 111111; */
+ rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
+ if (rc < 0)
+ return rc;
+
+ /* set auto */
+ rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
+ if (rc < 0)
+ return rc;
+
+ /* Try several xtal capacitor alternatives */
+ for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
+ rc = r820t_write_reg_mask(priv, 0x10,
+ r820t_xtal_capacitor[i][0], 0x1b);
+ if (rc < 0)
+ return rc;
+
+ usleep_range(5000, 6000);
+
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+ if (!(data[2] & 0x40))
+ continue;
+
+ val = data[2] & 0x3f;
+
+ if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
+ break;
+
+ if (val != 0x3f)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(r820t_xtal_capacitor))
+ return -EINVAL;
+
+ return r820t_xtal_capacitor[i][1];
+}
+
+static int r820t_imr_prepare(struct r820t_priv *priv)
+{
+ int rc;
+
+ /* Initialize the shadow registers */
+ memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
+
+ /* lna off (air-in off) */
+ rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
+ if (rc < 0)
+ return rc;
+
+ /* mixer gain mode = manual */
+ rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* filter corner = lowest */
+ rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
+ if (rc < 0)
+ return rc;
+
+ /* filter bw=+2cap, hp=5M */
+ rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
+ if (rc < 0)
+ return rc;
+
+ /* adc=on, vga code mode, gain = 26.5dB */
+ rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
+ if (rc < 0)
+ return rc;
+
+ /* ring clk = on */
+ rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
+ if (rc < 0)
+ return rc;
+
+ /* ring power = on */
+ rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
+ if (rc < 0)
+ return rc;
+
+ /* from ring = ring pll in */
+ rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
+ if (rc < 0)
+ return rc;
+
+ /* sw_pdect = det3 */
+ rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
+ if (rc < 0)
+ return rc;
+
+ /* Set filt_3dB */
+ rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
+
+ return rc;
+}
+
+static int r820t_multi_read(struct r820t_priv *priv)
+{
+ int rc, i;
+ u8 data[2], min = 0, max = 255, sum = 0;
+
+ usleep_range(5000, 6000);
+
+ for (i = 0; i < 6; i++) {
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ return rc;
+
+ sum += data[1];
+
+ if (data[1] < min)
+ min = data[1];
+
+ if (data[1] > max)
+ max = data[1];
+ }
+ rc = sum - max - min;
+
+ return rc;
+}
+
+static int r820t_imr_cross(struct r820t_priv *priv,
+ struct r820t_sect_type iq_point[3],
+ u8 *x_direct)
+{
+ struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
+ struct r820t_sect_type tmp;
+ int i, rc;
+ u8 reg08, reg09;
+
+ reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
+ reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
+
+ tmp.gain_x = 0;
+ tmp.phase_y = 0;
+ tmp.value = 255;
+
+ for (i = 0; i < 5; i++) {
+ switch (i) {
+ case 0:
+ cross[i].gain_x = reg08;
+ cross[i].phase_y = reg09;
+ break;
+ case 1:
+ cross[i].gain_x = reg08; /* 0 */
+ cross[i].phase_y = reg09 + 1; /* Q-1 */
+ break;
+ case 2:
+ cross[i].gain_x = reg08; /* 0 */
+ cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
+ break;
+ case 3:
+ cross[i].gain_x = reg08 + 1; /* Q-1 */
+ cross[i].phase_y = reg09;
+ break;
+ default:
+ cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
+ cross[i].phase_y = reg09;
+ }
+
+ rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_multi_read(priv);
+ if (rc < 0)
+ return rc;
+
+ cross[i].value = rc;
+
+ if (cross[i].value < tmp.value)
+ memcpy(&tmp, &cross[i], sizeof(tmp));
+ }
+
+ if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
+ *x_direct = 0;
+
+ iq_point[0] = cross[0];
+ iq_point[1] = cross[1];
+ iq_point[2] = cross[2];
+ } else { /* (0,0) or x-direction */
+ *x_direct = 1;
+
+ iq_point[0] = cross[0];
+ iq_point[1] = cross[3];
+ iq_point[2] = cross[4];
+ }
+ return 0;
+}
+
+static void r820t_compre_cor(struct r820t_sect_type iq[3])
+{
+ int i;
+
+ for (i = 3; i > 0; i--) {
+ if (iq[0].value > iq[i - 1].value)
+ swap(iq[0], iq[i - 1]);
+ }
+}
+
+static int r820t_compre_step(struct r820t_priv *priv,
+ struct r820t_sect_type iq[3], u8 reg)
+{
+ int rc;
+ struct r820t_sect_type tmp;
+
+ /*
+ * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
+ * with min value:
+ * new < min => update to min and continue
+ * new > min => Exit
+ */
+
+ /* min value already saved in iq[0] */
+ tmp.phase_y = iq[0].phase_y;
+ tmp.gain_x = iq[0].gain_x;
+
+ while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
+ ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
+ if (reg == 0x08)
+ tmp.gain_x++;
+ else
+ tmp.phase_y++;
+
+ rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_multi_read(priv);
+ if (rc < 0)
+ return rc;
+ tmp.value = rc;
+
+ if (tmp.value <= iq[0].value) {
+ iq[0].gain_x = tmp.gain_x;
+ iq[0].phase_y = tmp.phase_y;
+ iq[0].value = tmp.value;
+ } else {
+ return 0;
+ }
+
+ }
+
+ return 0;
+}
+
+static int r820t_iq_tree(struct r820t_priv *priv,
+ struct r820t_sect_type iq[3],
+ u8 fix_val, u8 var_val, u8 fix_reg)
+{
+ int rc, i;
+ u8 tmp, var_reg;
+
+ /*
+ * record IMC results by input gain/phase location then adjust
+ * gain or phase positive 1 step and negtive 1 step,
+ * both record results
+ */
+
+ if (fix_reg == 0x08)
+ var_reg = 0x09;
+ else
+ var_reg = 0x08;
+
+ for (i = 0; i < 3; i++) {
+ rc = r820t_write_reg(priv, fix_reg, fix_val);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg(priv, var_reg, var_val);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_multi_read(priv);
+ if (rc < 0)
+ return rc;
+ iq[i].value = rc;
+
+ if (fix_reg == 0x08) {
+ iq[i].gain_x = fix_val;
+ iq[i].phase_y = var_val;
+ } else {
+ iq[i].phase_y = fix_val;
+ iq[i].gain_x = var_val;
+ }
+
+ if (i == 0) { /* try right-side point */
+ var_val++;
+ } else if (i == 1) { /* try left-side point */
+ /* if absolute location is 1, change I/Q direction */
+ if ((var_val & 0x1f) < 0x02) {
+ tmp = 2 - (var_val & 0x1f);
+
+ /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
+ if (var_val & 0x20) {
+ var_val &= 0xc0;
+ var_val |= tmp;
+ } else {
+ var_val |= 0x20 | tmp;
+ }
+ } else {
+ var_val -= 2;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int r820t_section(struct r820t_priv *priv,
+ struct r820t_sect_type *iq_point)
+{
+ int rc;
+ struct r820t_sect_type compare_iq[3], compare_bet[3];
+
+ /* Try X-1 column and save min result to compare_bet[0] */
+ if (!(iq_point->gain_x & 0x1f))
+ compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
+ else
+ compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
+ compare_iq[0].phase_y = iq_point->phase_y;
+
+ /* y-direction */
+ rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
+ compare_iq[0].phase_y, 0x08);
+ if (rc < 0)
+ return rc;
+
+ r820t_compre_cor(compare_iq);
+
+ compare_bet[0] = compare_iq[0];
+
+ /* Try X column and save min result to compare_bet[1] */
+ compare_iq[0].gain_x = iq_point->gain_x;
+ compare_iq[0].phase_y = iq_point->phase_y;
+
+ rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
+ compare_iq[0].phase_y, 0x08);
+ if (rc < 0)
+ return rc;
+
+ r820t_compre_cor(compare_iq);
+
+ compare_bet[1] = compare_iq[0];
+
+ /* Try X+1 column and save min result to compare_bet[2] */
+ if ((iq_point->gain_x & 0x1f) == 0x00)
+ compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
+ else
+ compare_iq[0].gain_x = iq_point->gain_x + 1;
+ compare_iq[0].phase_y = iq_point->phase_y;
+
+ rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
+ compare_iq[0].phase_y, 0x08);
+ if (rc < 0)
+ return rc;
+
+ r820t_compre_cor(compare_iq);
+
+ compare_bet[2] = compare_iq[0];
+
+ r820t_compre_cor(compare_bet);
+
+ *iq_point = compare_bet[0];
+
+ return 0;
+}
+
+static int r820t_vga_adjust(struct r820t_priv *priv)
+{
+ int rc;
+ u8 vga_count;
+
+ /* increase vga power to let image significant */
+ for (vga_count = 12; vga_count < 16; vga_count++) {
+ rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
+ if (rc < 0)
+ return rc;
+
+ usleep_range(10000, 11000);
+
+ rc = r820t_multi_read(priv);
+ if (rc < 0)
+ return rc;
+
+ if (rc > 40 * 4)
+ break;
+ }
+
+ return 0;
+}
+
+static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
+{
+ struct r820t_sect_type compare_iq[3];
+ int rc;
+ u8 x_direction = 0; /* 1:x, 0:y */
+ u8 dir_reg, other_reg;
+
+ r820t_vga_adjust(priv);
+
+ rc = r820t_imr_cross(priv, compare_iq, &x_direction);
+ if (rc < 0)
+ return rc;
+
+ if (x_direction == 1) {
+ dir_reg = 0x08;
+ other_reg = 0x09;
+ } else {
+ dir_reg = 0x09;
+ other_reg = 0x08;
+ }
+
+ /* compare and find min of 3 points. determine i/q direction */
+ r820t_compre_cor(compare_iq);
+
+ /* increase step to find min value of this direction */
+ rc = r820t_compre_step(priv, compare_iq, dir_reg);
+ if (rc < 0)
+ return rc;
+
+ /* the other direction */
+ rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
+ compare_iq[0].phase_y, dir_reg);
+ if (rc < 0)
+ return rc;
+
+ /* compare and find min of 3 points. determine i/q direction */
+ r820t_compre_cor(compare_iq);
+
+ /* increase step to find min value on this direction */
+ rc = r820t_compre_step(priv, compare_iq, other_reg);
+ if (rc < 0)
+ return rc;
+
+ /* check 3 points again */
+ rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
+ compare_iq[0].phase_y, other_reg);
+ if (rc < 0)
+ return rc;
+
+ r820t_compre_cor(compare_iq);
+
+ /* section-9 check */
+ rc = r820t_section(priv, compare_iq);
+
+ *iq_pont = compare_iq[0];
+
+ /* reset gain/phase control setting */
+ rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
+
+ return rc;
+}
+
+static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
+{
+ int rc;
+
+ r820t_vga_adjust(priv);
+
+ /*
+ * search surrounding points from previous point
+ * try (x-1), (x), (x+1) columns, and find min IMR result point
+ */
+ rc = r820t_section(priv, iq_pont);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
+{
+ struct r820t_sect_type imr_point;
+ int rc;
+ u32 ring_vco, ring_freq, ring_ref;
+ u8 n_ring, n;
+ int reg18, reg19, reg1f;
+
+ if (priv->cfg->xtal > 24000000)
+ ring_ref = priv->cfg->xtal / 2;
+ else
+ ring_ref = priv->cfg->xtal;
+
+ n_ring = 15;
+ for (n = 0; n < 16; n++) {
+ if ((16 + n) * 8 * ring_ref >= 3100000) {
+ n_ring = n;
+ break;
+ }
+ }
+
+ reg18 = r820t_read_cache_reg(priv, 0x18);
+ reg19 = r820t_read_cache_reg(priv, 0x19);
+ reg1f = r820t_read_cache_reg(priv, 0x1f);
+
+ reg18 &= 0xf0; /* set ring[3:0] */
+ reg18 |= n_ring;
+
+ ring_vco = (16 + n_ring) * 8 * ring_ref;
+
+ reg18 &= 0xdf; /* clear ring_se23 */
+ reg19 &= 0xfc; /* clear ring_seldiv */
+ reg1f &= 0xfc; /* clear ring_att */
+
+ switch (imr_mem) {
+ case 0:
+ ring_freq = ring_vco / 48;
+ reg18 |= 0x20; /* ring_se23 = 1 */
+ reg19 |= 0x03; /* ring_seldiv = 3 */
+ reg1f |= 0x02; /* ring_att 10 */
+ break;
+ case 1:
+ ring_freq = ring_vco / 16;
+ reg18 |= 0x00; /* ring_se23 = 0 */
+ reg19 |= 0x02; /* ring_seldiv = 2 */
+ reg1f |= 0x00; /* pw_ring 00 */
+ break;
+ case 2:
+ ring_freq = ring_vco / 8;
+ reg18 |= 0x00; /* ring_se23 = 0 */
+ reg19 |= 0x01; /* ring_seldiv = 1 */
+ reg1f |= 0x03; /* pw_ring 11 */
+ break;
+ case 3:
+ ring_freq = ring_vco / 6;
+ reg18 |= 0x20; /* ring_se23 = 1 */
+ reg19 |= 0x00; /* ring_seldiv = 0 */
+ reg1f |= 0x03; /* pw_ring 11 */
+ break;
+ case 4:
+ ring_freq = ring_vco / 4;
+ reg18 |= 0x00; /* ring_se23 = 0 */
+ reg19 |= 0x00; /* ring_seldiv = 0 */
+ reg1f |= 0x01; /* pw_ring 01 */
+ break;
+ default:
+ ring_freq = ring_vco / 4;
+ reg18 |= 0x00; /* ring_se23 = 0 */
+ reg19 |= 0x00; /* ring_seldiv = 0 */
+ reg1f |= 0x01; /* pw_ring 01 */
+ break;
+ }
+
+
+ /* write pw_ring, n_ring, ringdiv2 registers */
+
+ /* n_ring, ring_se23 */
+ rc = r820t_write_reg(priv, 0x18, reg18);
+ if (rc < 0)
+ return rc;
+
+ /* ring_sediv */
+ rc = r820t_write_reg(priv, 0x19, reg19);
+ if (rc < 0)
+ return rc;
+
+ /* pw_ring */
+ rc = r820t_write_reg(priv, 0x1f, reg1f);
+ if (rc < 0)
+ return rc;
+
+ /* mux input freq ~ rf_in freq */
+ rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
+ (ring_freq - 5300) * 1000);
+ if (!priv->has_lock)
+ rc = -EINVAL;
+ if (rc < 0)
+ return rc;
+
+ if (im_flag) {
+ rc = r820t_iq(priv, &imr_point);
+ } else {
+ imr_point.gain_x = priv->imr_data[3].gain_x;
+ imr_point.phase_y = priv->imr_data[3].phase_y;
+ imr_point.value = priv->imr_data[3].value;
+
+ rc = r820t_f_imr(priv, &imr_point);
+ }
+ if (rc < 0)
+ return rc;
+
+ /* save IMR value */
+ switch (imr_mem) {
+ case 0:
+ priv->imr_data[0].gain_x = imr_point.gain_x;
+ priv->imr_data[0].phase_y = imr_point.phase_y;
+ priv->imr_data[0].value = imr_point.value;
+ break;
+ case 1:
+ priv->imr_data[1].gain_x = imr_point.gain_x;
+ priv->imr_data[1].phase_y = imr_point.phase_y;
+ priv->imr_data[1].value = imr_point.value;
+ break;
+ case 2:
+ priv->imr_data[2].gain_x = imr_point.gain_x;
+ priv->imr_data[2].phase_y = imr_point.phase_y;
+ priv->imr_data[2].value = imr_point.value;
+ break;
+ case 3:
+ priv->imr_data[3].gain_x = imr_point.gain_x;
+ priv->imr_data[3].phase_y = imr_point.phase_y;
+ priv->imr_data[3].value = imr_point.value;
+ break;
+ case 4:
+ priv->imr_data[4].gain_x = imr_point.gain_x;
+ priv->imr_data[4].phase_y = imr_point.phase_y;
+ priv->imr_data[4].value = imr_point.value;
+ break;
+ default:
+ priv->imr_data[4].gain_x = imr_point.gain_x;
+ priv->imr_data[4].phase_y = imr_point.phase_y;
+ priv->imr_data[4].value = imr_point.value;
+ break;
+ }
+
+ return 0;
+}
+
+static int r820t_imr_callibrate(struct r820t_priv *priv)
+{
+ int rc, i;
+ int xtal_cap = 0;
+
+ if (priv->init_done)
+ return 0;
+
+ /* Detect Xtal capacitance */
+ if ((priv->cfg->rafael_chip == CHIP_R820T) ||
+ (priv->cfg->rafael_chip == CHIP_R828S) ||
+ (priv->cfg->rafael_chip == CHIP_R820C)) {
+ priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
+ } else {
+ /* Initialize registers */
+ rc = r820t_write(priv, 0x05,
+ r820t_init_array, sizeof(r820t_init_array));
+ if (rc < 0)
+ return rc;
+ for (i = 0; i < 3; i++) {
+ rc = r820t_xtal_check(priv);
+ if (rc < 0)
+ return rc;
+ if (!i || rc > xtal_cap)
+ xtal_cap = rc;
+ }
+ priv->xtal_cap_sel = xtal_cap;
+ }
+
+ /*
+ * Disables IMR callibration. That emulates the same behaviour
+ * as what is done by rtl-sdr userspace library. Useful for testing
+ */
+ if (no_imr_cal) {
+ priv->init_done = true;
+
+ return 0;
+ }
+
+ /* Initialize registers */
+ rc = r820t_write(priv, 0x05,
+ r820t_init_array, sizeof(r820t_init_array));
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_imr_prepare(priv);
+ if (rc < 0)
+ return rc;
+
+ rc = r820t_imr(priv, 3, true);
+ if (rc < 0)
+ return rc;
+ rc = r820t_imr(priv, 1, false);
+ if (rc < 0)
+ return rc;
+ rc = r820t_imr(priv, 0, false);
+ if (rc < 0)
+ return rc;
+ rc = r820t_imr(priv, 2, false);
+ if (rc < 0)
+ return rc;
+ rc = r820t_imr(priv, 4, false);
+ if (rc < 0)
+ return rc;
+
+ priv->init_done = true;
+ priv->imr_done = true;
+
+ return 0;
+}
+
+#if 0
+/* Not used, for now */
+static int r820t_gpio(struct r820t_priv *priv, bool enable)
+{
+ return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
+}
+#endif
+
+/*
+ * r820t frontend operations and tuner attach code
+ *
+ * All driver locks and i2c control are only in this part of the code
+ */
+
+static int r820t_init(struct dvb_frontend *fe)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ int rc;
+
+ tuner_dbg("%s:\n", __func__);
+
+ mutex_lock(&priv->lock);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ rc = r820t_imr_callibrate(priv);
+ if (rc < 0)
+ goto err;
+
+ /* Initialize registers */
+ rc = r820t_write(priv, 0x05,
+ r820t_init_array, sizeof(r820t_init_array));
+
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ mutex_unlock(&priv->lock);
+
+ if (rc < 0)
+ tuner_dbg("%s: failed=%d\n", __func__, rc);
+ return rc;
+}
+
+static int r820t_sleep(struct dvb_frontend *fe)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ int rc;
+
+ tuner_dbg("%s:\n", __func__);
+
+ mutex_lock(&priv->lock);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ rc = r820t_standby(priv);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ mutex_unlock(&priv->lock);
+
+ tuner_dbg("%s: failed=%d\n", __func__, rc);
+ return rc;
+}
+
+static int r820t_set_analog_freq(struct dvb_frontend *fe,
+ struct analog_parameters *p)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ unsigned bw;
+ int rc;
+
+ tuner_dbg("%s called\n", __func__);
+
+ /* if std is not defined, choose one */
+ if (!p->std)
+ p->std = V4L2_STD_MN;
+
+ if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
+ bw = 6;
+ else
+ bw = 8;
+
+ mutex_lock(&priv->lock);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ rc = generic_set_freq(fe, 62500l * p->frequency, bw,
+ V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ mutex_unlock(&priv->lock);
+
+ return rc;
+}
+
+static int r820t_set_params(struct dvb_frontend *fe)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int rc;
+ unsigned bw;
+
+ tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
+ __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
+
+ mutex_lock(&priv->lock);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ bw = (c->bandwidth_hz + 500000) / 1000000;
+ if (!bw)
+ bw = 8;
+
+ rc = generic_set_freq(fe, c->frequency, bw,
+ V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ mutex_unlock(&priv->lock);
+
+ if (rc)
+ tuner_dbg("%s: failed=%d\n", __func__, rc);
+ return rc;
+}
+
+static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ int rc = 0;
+
+ mutex_lock(&priv->lock);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ if (priv->has_lock) {
+ rc = r820t_read_gain(priv);
+ if (rc < 0)
+ goto err;
+
+ /* A higher gain at LNA means a lower signal strength */
+ *strength = (45 - rc) << 4 | 0xff;
+ if (*strength == 0xff)
+ *strength = 0;
+ } else {
+ *strength = 0;
+ }
+
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ mutex_unlock(&priv->lock);
+
+ tuner_dbg("%s: %s, gain=%d strength=%d\n",
+ __func__,
+ priv->has_lock ? "PLL locked" : "no signal",
+ rc, *strength);
+
+ return 0;
+}
+
+static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+
+ tuner_dbg("%s:\n", __func__);
+
+ *frequency = priv->int_freq;
+
+ return 0;
+}
+
+static int r820t_release(struct dvb_frontend *fe)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+
+ tuner_dbg("%s:\n", __func__);
+
+ mutex_lock(&r820t_list_mutex);
+
+ if (priv)
+ hybrid_tuner_release_state(priv);
+
+ mutex_unlock(&r820t_list_mutex);
+
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+
+ return 0;
+}
+
+static const struct dvb_tuner_ops r820t_tuner_ops = {
+ .info = {
+ .name = "Rafael Micro R820T",
+ .frequency_min = 42000000,
+ .frequency_max = 1002000000,
+ },
+ .init = r820t_init,
+ .release = r820t_release,
+ .sleep = r820t_sleep,
+ .set_params = r820t_set_params,
+ .set_analog_params = r820t_set_analog_freq,
+ .get_if_frequency = r820t_get_if_frequency,
+ .get_rf_strength = r820t_signal,
+};
+
+struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c,
+ const struct r820t_config *cfg)
+{
+ struct r820t_priv *priv;
+ int rc = -ENODEV;
+ u8 data[5];
+ int instance;
+
+ mutex_lock(&r820t_list_mutex);
+
+ instance = hybrid_tuner_request_state(struct r820t_priv, priv,
+ hybrid_tuner_instance_list,
+ i2c, cfg->i2c_addr,
+ "r820t");
+ switch (instance) {
+ case 0:
+ /* memory allocation failure */
+ goto err_no_gate;
+ break;
+ case 1:
+ /* new tuner instance */
+ priv->cfg = cfg;
+
+ mutex_init(&priv->lock);
+
+ fe->tuner_priv = priv;
+ break;
+ case 2:
+ /* existing tuner instance */
+ fe->tuner_priv = priv;
+ break;
+ }
+
+ memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, sizeof(r820t_tuner_ops));
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ /* check if the tuner is there */
+ rc = r820t_read(priv, 0x00, data, sizeof(data));
+ if (rc < 0)
+ goto err;
+
+ rc = r820t_sleep(fe);
+ if (rc < 0)
+ goto err;
+
+ tuner_info("Rafael Micro r820t successfully identified\n");
+
+ fe->tuner_priv = priv;
+ memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ mutex_unlock(&r820t_list_mutex);
+
+ return fe;
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+err_no_gate:
+ mutex_unlock(&r820t_list_mutex);
+
+ tuner_info("%s: failed=%d\n", __func__, rc);
+ r820t_release(fe);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(r820t_attach);
+
+MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
+MODULE_LICENSE("GPL");