@@ -241,4 +241,11 @@ config MEDIA_TUNER_TUA9001
default m if !MEDIA_SUBDRV_AUTOSELECT
help
Infineon TUA 9001 silicon tuner driver.
+
+config MEDIA_TUNER_R820T
+ tristate "Rafael Micro R820T silicon tuner"
+ depends on MEDIA_SUPPORT && I2C
+ default m if !MEDIA_SUBDRV_AUTOSELECT
+ help
+ Rafael Micro R820T silicon tuner driver.
endmenu
@@ -34,6 +34,7 @@ obj-$(CONFIG_MEDIA_TUNER_TUA9001) += tua9001.o
obj-$(CONFIG_MEDIA_TUNER_FC0011) += fc0011.o
obj-$(CONFIG_MEDIA_TUNER_FC0012) += fc0012.o
obj-$(CONFIG_MEDIA_TUNER_FC0013) += fc0013.o
+obj-$(CONFIG_MEDIA_TUNER_R820T) += r820t.o
ccflags-y += -I$(srctree)/drivers/media/dvb-core
ccflags-y += -I$(srctree)/drivers/media/dvb-frontends
new file mode 100644
@@ -0,0 +1,1486 @@
+/*
+ * 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 "tuner-i2c.h"
+#include <asm/div64.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 VER_NUM 49
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+/*
+ * 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_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;
+
+ /* Store current mode */
+ u32 delsys;
+ enum v4l2_tuner_type type;
+ v4l2_std_id std;
+ u32 bw; /* in MHz */
+
+ bool has_lock;
+};
+
+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
+
+/*
+ * 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 },
+};
+
+/*
+ * 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_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
+ u8 bit_mask)
+{
+ int r = reg - REG_SHADOW_START;
+
+ if (r >= 0 && r < NUM_REGS)
+ val = (priv->regs[r] & ~bit_mask) | (val & bit_mask);
+ else
+ return -EINVAL;
+
+ return r820t_write(priv, reg, &val, 1);
+}
+
+static int r820_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
+{
+ int rc;
+ 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;
+ }
+ tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
+ __func__, reg, len, len, p);
+
+ /* Copy data to the output buffer */
+ memcpy(val, p, len);
+
+ 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;
+
+ /* 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;
+
+ /*
+ * FIXME: the original driver has a logic there with preserves
+ * gain/phase from registers 8 and 9 reading the data from the
+ * registers before writing, if "IMF done". That code was sort of
+ * commented there, as the flag is always false.
+ */
+ 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_set_pll(struct r820t_priv *priv, u32 freq)
+{
+ u64 tmp64, vco_freq;
+ int rc, i;
+ 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 ni, si, nint, vco_fine_tune, val;
+ u8 data[5];
+
+ freq = freq / 1000; /* Frequency in kHz */
+
+ pll_ref = priv->cfg->xtal / 1000;
+
+ tuner_dbg("set r820t pll for frequency %d kHz = %d\n", freq, pll_ref);
+
+ /* FIXME: this seems to be a hack - probably it can be removed */
+ rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x00);
+ 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 = r820_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 = (u64)(freq * (u64)mix_div);
+
+ tmp64 = vco_freq;
+ do_div(tmp64, 2 * pll_ref);
+ nint = (u8)tmp64;
+
+ tmp64 = vco_freq - ((u64)2) * pll_ref * nint;
+ do_div(tmp64, 1000);
+ vco_fra = (u16)(tmp64);
+
+ pll_ref /= 1000;
+
+ /* 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;
+ }
+
+ rc = r820t_write_reg_mask(priv, 0x16, sdm >> 8, 0x08);
+ if (rc < 0)
+ return rc;
+ rc = r820t_write_reg_mask(priv, 0x15, sdm & 0xff, 0x08);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0; i < 2; i++) {
+ /*
+ * FIXME: Rafael chips R620D, R828D and R828 seems to
+ * need 20 ms for analog TV
+ */
+ msleep(10);
+
+ /* Check if PLL has locked */
+ rc = r820_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;
+ }
+
+ 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_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 */
+#if 0 /* 7 MHz type 2 - nor sure why/where this is used - Perhaps Australia? */
+ 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 */
+#endif
+ } 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;
+ msleep(1);
+ }
+ priv->int_freq = if_khz;
+
+ /* 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, filt_cal_lo);
+ if (rc < 0 || !priv->has_lock)
+ return rc;
+
+ /* Start Trigger */
+ rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
+ if (rc < 0)
+ return rc;
+
+ msleep(1);
+
+ /* 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 = r820_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, 0x10);
+ 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 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);
+
+ mutex_lock(&priv->lock);
+
+ 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_tv_standard(priv, bw, type, std, delsys);
+ if (rc < 0)
+ goto err;
+
+ rc = r820t_set_mux(priv, lo_freq);
+ if (rc < 0)
+ goto err;
+ rc = r820t_set_pll(priv, lo_freq);
+ if (rc < 0 || !priv->has_lock)
+ goto err;
+
+ rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
+err:
+ mutex_unlock(&priv->lock);
+
+ 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;
+
+ 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;
+
+ msleep(5);
+
+ rc = r820_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];
+}
+
+/*
+ * r820t frontend operations and tuner attach code
+ */
+
+static int r820t_init(struct dvb_frontend *fe)
+{
+ struct r820t_priv *priv = fe->tuner_priv;
+ int rc, i;
+ int xtal_cap = 0;
+
+ tuner_dbg("%s:\n", __func__);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ mutex_lock(&priv->lock);
+
+ 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 {
+ for (i = 0; i < 3; i++) {
+ rc = r820t_xtal_check(priv);
+ if (rc < 0)
+ goto err;
+ if (!i || rc > xtal_cap)
+ xtal_cap = rc;
+ }
+ priv->xtal_cap_sel = xtal_cap;
+ }
+
+ /* Initialize registers */
+ rc = r820t_write(priv, 0x05,
+ r820t_init_array, sizeof(r820t_init_array));
+
+ mutex_unlock(&priv->lock);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ return rc;
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 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__);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ mutex_lock(&priv->lock);
+ rc = r820t_standby(priv);
+ mutex_unlock(&priv->lock);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ 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;
+
+ 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;
+
+ return generic_set_freq(fe, 62500l * p->frequency, bw,
+ V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
+}
+
+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);
+
+ 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);
+
+ 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;
+
+ if (priv->has_lock)
+ *strength = 0xffff;
+ else
+ *strength = 0;
+
+ 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);
+
+ fe->tuner_priv = NULL;
+
+ kfree(fe->tuner_priv);
+
+ 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 = r820_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");
new file mode 100644
@@ -0,0 +1,55 @@
+/*
+ * Elonics R820T silicon tuner driver
+ *
+ * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef R820T_H
+#define R820T_H
+
+#include <linux/kconfig.h>
+#include "dvb_frontend.h"
+
+enum r820t_chip {
+ CHIP_R820T,
+ CHIP_R828S,
+ CHIP_R820C,
+};
+
+struct r820t_config {
+ u8 i2c_addr; /* 0x34 */
+
+ u32 xtal;
+ enum r820t_chip rafael_chip;
+ unsigned max_i2c_msg_len;
+};
+
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_R820T)
+struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c,
+ const struct r820t_config *cfg);
+#else
+static inline struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c,
+ const struct r820t_config *cfg)
+{
+ pr_warn("%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif
+
+#endif
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 http://cgit.osmocom.org/rtl-sdr/plain/src/tuner_r820t.c (there are also other variants of it out there) 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. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com> --- drivers/media/tuners/Kconfig | 7 + drivers/media/tuners/Makefile | 1 + drivers/media/tuners/r820t.c | 1486 +++++++++++++++++++++++++++++++++++++++++ drivers/media/tuners/r820t.h | 55 ++ 4 files changed, 1549 insertions(+) create mode 100644 drivers/media/tuners/r820t.c create mode 100644 drivers/media/tuners/r820t.h