// SPDX-License-Identifier: GPL-2.0
/*
* Maxim Integrated MAX2175 RF to Bits tuner driver
*
* This driver & most of the hard coded values are based on the reference
* application delivered by Maxim for this device.
*
* Copyright (C) 2016 Maxim Integrated Products
* Copyright (C) 2017 Renesas Electronics Corporation
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/max2175.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include "max2175.h"
#define DRIVER_NAME "max2175"
#define mxm_dbg(ctx, fmt, arg...) dev_dbg(&ctx->client->dev, fmt, ## arg)
#define mxm_err(ctx, fmt, arg...) dev_err(&ctx->client->dev, fmt, ## arg)
/* Rx mode */
struct max2175_rxmode {
enum max2175_band band; /* Associated band */
u32 freq; /* Default freq in Hz */
u8 i2s_word_size; /* Bit value */
};
/* Register map to define preset values */
struct max2175_reg_map {
u8 idx; /* Register index */
u8 val; /* Register value */
};
static const struct max2175_rxmode eu_rx_modes[] = {
/* EU modes */
[MAX2175_EU_FM_1_2] = { MAX2175_BAND_FM, 98256000 , 1 },
[MAX2175_DAB_1_2] = { MAX2175_BAND_VHF, 182640000 , 0 },
};
static const struct max2175_rxmode na_rx_modes[] = {
/* NA modes */
[MAX2175_NA_FM_1_0] = { MAX2175_BAND_FM, 98255520 , 1 },
[MAX2175_NA_FM_2_0] = { MAX2175_BAND_FM, 98255520 , 6 },
};
/*
* Preset values:
* Based on Maxim MAX2175 Register Table revision: 130p10
*/
static const u8 full_fm_eu_1p0[] = {
0 x15, 0 x04, 0 xb8, 0 xe3, 0 x35, 0 x18, 0 x7c, 0 x00,
0 x00, 0 x7d, 0 x40, 0 x08, 0 x70, 0 x7a, 0 x88, 0 x91,
0 x61, 0 x61, 0 x61, 0 x61, 0 x5a, 0 x0f, 0 x34, 0 x1c,
0 x14, 0 x88, 0 x33, 0 x02, 0 x00, 0 x09, 0 x00, 0 x65,
0 x9f, 0 x2b, 0 x80, 0 x00, 0 x95, 0 x05, 0 x2c, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x40,
0 x4a, 0 x08, 0 xa8, 0 x0e, 0 x0e, 0 x2f, 0 x7e, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 xab, 0 x5e, 0 xa9,
0 xae, 0 xbb, 0 x57, 0 x18, 0 x3b, 0 x03, 0 x3b, 0 x64,
0 x40, 0 x60, 0 x00, 0 x2a, 0 xbf, 0 x3f, 0 xff, 0 x9f,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x0a, 0 x00,
0 xff, 0 xfc, 0 xef, 0 x1c, 0 x40, 0 x00, 0 x00, 0 x02,
0 x00, 0 x00, 0 xe0, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 xac, 0 x40, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x75, 0 x00, 0 x00,
0 x00, 0 x47, 0 x00, 0 x00, 0 x11, 0 x3f, 0 x22, 0 x00,
0 xf1, 0 x00, 0 x41, 0 x03, 0 xb0, 0 x00, 0 x00, 0 x00,
0 x1b,
};
static const u8 full_fm_na_1p0[] = {
0 x13, 0 x08, 0 x8d, 0 xc0, 0 x35, 0 x18, 0 x7d, 0 x3f,
0 x7d, 0 x75, 0 x40, 0 x08, 0 x70, 0 x7a, 0 x88, 0 x91,
0 x61, 0 x61, 0 x61, 0 x61, 0 x5c, 0 x0f, 0 x34, 0 x1c,
0 x14, 0 x88, 0 x33, 0 x02, 0 x00, 0 x01, 0 x00, 0 x65,
0 x9f, 0 x2b, 0 x80, 0 x00, 0 x95, 0 x05, 0 x2c, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x40,
0 x4a, 0 x08, 0 xa8, 0 x0e, 0 x0e, 0 xaf, 0 x7e, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 xab, 0 x5e, 0 xa9,
0 xae, 0 xbb, 0 x57, 0 x18, 0 x3b, 0 x03, 0 x3b, 0 x64,
0 x40, 0 x60, 0 x00, 0 x2a, 0 xbf, 0 x3f, 0 xff, 0 x9f,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x0a, 0 x00,
0 xff, 0 xfc, 0 xef, 0 x1c, 0 x40, 0 x00, 0 x00, 0 x02,
0 x00, 0 x00, 0 xe0, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 xa6, 0 x40, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x75, 0 x00, 0 x00,
0 x00, 0 x35, 0 x00, 0 x00, 0 x11, 0 x3f, 0 x22, 0 x00,
0 xf1, 0 x00, 0 x41, 0 x03, 0 xb0, 0 x00, 0 x00, 0 x00,
0 x1b,
};
/* DAB1.2 settings */
static const struct max2175_reg_map dab12_map[] = {
{ 0 x01, 0 x13 }, { 0 x02, 0 x0d }, { 0 x03, 0 x15 }, { 0 x04, 0 x55 },
{ 0 x05, 0 x0a }, { 0 x06, 0 xa0 }, { 0 x07, 0 x40 }, { 0 x08, 0 x00 },
{ 0 x09, 0 x00 }, { 0 x0a, 0 x7d }, { 0 x0b, 0 x4a }, { 0 x0c, 0 x28 },
{ 0 x0e, 0 x43 }, { 0 x0f, 0 xb5 }, { 0 x10, 0 x31 }, { 0 x11, 0 x9e },
{ 0 x12, 0 x68 }, { 0 x13, 0 x9e }, { 0 x14, 0 x68 }, { 0 x15, 0 x58 },
{ 0 x16, 0 x2f }, { 0 x17, 0 x3f }, { 0 x18, 0 x40 }, { 0 x1a, 0 x88 },
{ 0 x1b, 0 xaa }, { 0 x1c, 0 x9a }, { 0 x1d, 0 x00 }, { 0 x1e, 0 x00 },
{ 0 x23, 0 x80 }, { 0 x24, 0 x00 }, { 0 x25, 0 x00 }, { 0 x26, 0 x00 },
{ 0 x27, 0 x00 }, { 0 x32, 0 x08 }, { 0 x33, 0 xf8 }, { 0 x36, 0 x2d },
{ 0 x37, 0 x7e }, { 0 x55, 0 xaf }, { 0 x56, 0 x3f }, { 0 x57, 0 xf8 },
{ 0 x58, 0 x99 }, { 0 x76, 0 x00 }, { 0 x77, 0 x00 }, { 0 x78, 0 x02 },
{ 0 x79, 0 x40 }, { 0 x82, 0 x00 }, { 0 x83, 0 x00 }, { 0 x85, 0 x00 },
{ 0 x86, 0 x20 },
};
/* EU FM 1.2 settings */
static const struct max2175_reg_map fmeu1p2_map[] = {
{ 0 x01, 0 x15 }, { 0 x02, 0 x04 }, { 0 x03, 0 xb8 }, { 0 x04, 0 xe3 },
{ 0 x05, 0 x35 }, { 0 x06, 0 x18 }, { 0 x07, 0 x7c }, { 0 x08, 0 x00 },
{ 0 x09, 0 x00 }, { 0 x0a, 0 x73 }, { 0 x0b, 0 x40 }, { 0 x0c, 0 x08 },
{ 0 x0e, 0 x7a }, { 0 x0f, 0 x88 }, { 0 x10, 0 x91 }, { 0 x11, 0 x61 },
{ 0 x12, 0 x61 }, { 0 x13, 0 x61 }, { 0 x14, 0 x61 }, { 0 x15, 0 x5a },
{ 0 x16, 0 x0f }, { 0 x17, 0 x34 }, { 0 x18, 0 x1c }, { 0 x1a, 0 x88 },
{ 0 x1b, 0 x33 }, { 0 x1c, 0 x02 }, { 0 x1d, 0 x00 }, { 0 x1e, 0 x01 },
{ 0 x23, 0 x80 }, { 0 x24, 0 x00 }, { 0 x25, 0 x95 }, { 0 x26, 0 x05 },
{ 0 x27, 0 x2c }, { 0 x32, 0 x08 }, { 0 x33, 0 xa8 }, { 0 x36, 0 x2f },
{ 0 x37, 0 x7e }, { 0 x55, 0 xbf }, { 0 x56, 0 x3f }, { 0 x57, 0 xff },
{ 0 x58, 0 x9f }, { 0 x76, 0 xac }, { 0 x77, 0 x40 }, { 0 x78, 0 x00 },
{ 0 x79, 0 x00 }, { 0 x82, 0 x47 }, { 0 x83, 0 x00 }, { 0 x85, 0 x11 },
{ 0 x86, 0 x3f },
};
/* FM NA 1.0 settings */
static const struct max2175_reg_map fmna1p0_map[] = {
{ 0 x01, 0 x13 }, { 0 x02, 0 x08 }, { 0 x03, 0 x8d }, { 0 x04, 0 xc0 },
{ 0 x05, 0 x35 }, { 0 x06, 0 x18 }, { 0 x07, 0 x7d }, { 0 x08, 0 x3f },
{ 0 x09, 0 x7d }, { 0 x0a, 0 x75 }, { 0 x0b, 0 x40 }, { 0 x0c, 0 x08 },
{ 0 x0e, 0 x7a }, { 0 x0f, 0 x88 }, { 0 x10, 0 x91 }, { 0 x11, 0 x61 },
{ 0 x12, 0 x61 }, { 0 x13, 0 x61 }, { 0 x14, 0 x61 }, { 0 x15, 0 x5c },
{ 0 x16, 0 x0f }, { 0 x17, 0 x34 }, { 0 x18, 0 x1c }, { 0 x1a, 0 x88 },
{ 0 x1b, 0 x33 }, { 0 x1c, 0 x02 }, { 0 x1d, 0 x00 }, { 0 x1e, 0 x01 },
{ 0 x23, 0 x80 }, { 0 x24, 0 x00 }, { 0 x25, 0 x95 }, { 0 x26, 0 x05 },
{ 0 x27, 0 x2c }, { 0 x32, 0 x08 }, { 0 x33, 0 xa8 }, { 0 x36, 0 xaf },
{ 0 x37, 0 x7e }, { 0 x55, 0 xbf }, { 0 x56, 0 x3f }, { 0 x57, 0 xff },
{ 0 x58, 0 x9f }, { 0 x76, 0 xa6 }, { 0 x77, 0 x40 }, { 0 x78, 0 x00 },
{ 0 x79, 0 x00 }, { 0 x82, 0 x35 }, { 0 x83, 0 x00 }, { 0 x85, 0 x11 },
{ 0 x86, 0 x3f },
};
/* FM NA 2.0 settings */
static const struct max2175_reg_map fmna2p0_map[] = {
{ 0 x01, 0 x13 }, { 0 x02, 0 x08 }, { 0 x03, 0 x8d }, { 0 x04, 0 xc0 },
{ 0 x05, 0 x35 }, { 0 x06, 0 x18 }, { 0 x07, 0 x7c }, { 0 x08, 0 x54 },
{ 0 x09, 0 xa7 }, { 0 x0a, 0 x55 }, { 0 x0b, 0 x42 }, { 0 x0c, 0 x48 },
{ 0 x0e, 0 x7a }, { 0 x0f, 0 x88 }, { 0 x10, 0 x91 }, { 0 x11, 0 x61 },
{ 0 x12, 0 x61 }, { 0 x13, 0 x61 }, { 0 x14, 0 x61 }, { 0 x15, 0 x5c },
{ 0 x16, 0 x0f }, { 0 x17, 0 x34 }, { 0 x18, 0 x1c }, { 0 x1a, 0 x88 },
{ 0 x1b, 0 x33 }, { 0 x1c, 0 x02 }, { 0 x1d, 0 x00 }, { 0 x1e, 0 x01 },
{ 0 x23, 0 x80 }, { 0 x24, 0 x00 }, { 0 x25, 0 x95 }, { 0 x26, 0 x05 },
{ 0 x27, 0 x2c }, { 0 x32, 0 x08 }, { 0 x33, 0 xa8 }, { 0 x36, 0 xaf },
{ 0 x37, 0 x7e }, { 0 x55, 0 xbf }, { 0 x56, 0 x3f }, { 0 x57, 0 xff },
{ 0 x58, 0 x9f }, { 0 x76, 0 xac }, { 0 x77, 0 xc0 }, { 0 x78, 0 x00 },
{ 0 x79, 0 x00 }, { 0 x82, 0 x6b }, { 0 x83, 0 x00 }, { 0 x85, 0 x11 },
{ 0 x86, 0 x3f },
};
static const u16 ch_coeff_dab1[] = {
0 x001c, 0 x0007, 0 xffcd, 0 x0056, 0 xffa4, 0 x0033, 0 x0027, 0 xff61,
0 x010e, 0 xfec0, 0 x0106, 0 xffb8, 0 xff1c, 0 x023c, 0 xfcb2, 0 x039b,
0 xfd4e, 0 x0055, 0 x036a, 0 xf7de, 0 x0d21, 0 xee72, 0 x1499, 0 x6a51,
};
static const u16 ch_coeff_fmeu[] = {
0 x0000, 0 xffff, 0 x0001, 0 x0002, 0 xfffa, 0 xffff, 0 x0015, 0 xffec,
0 xffde, 0 x0054, 0 xfff9, 0 xff52, 0 x00b8, 0 x00a2, 0 xfe0a, 0 x00af,
0 x02e3, 0 xfc14, 0 xfe89, 0 x089d, 0 xfa2e, 0 xf30f, 0 x25be, 0 x4eb6,
};
static const u16 eq_coeff_fmeu1_ra02_m6db[] = {
0 x0040, 0 xffc6, 0 xfffa, 0 x002c, 0 x000d, 0 xff90, 0 x0037, 0 x006e,
0 xffc0, 0 xff5b, 0 x006a, 0 x00f0, 0 xff57, 0 xfe94, 0 x0112, 0 x0252,
0 xfe0c, 0 xfc6a, 0 x0385, 0 x0553, 0 xfa49, 0 xf789, 0 x0b91, 0 x1a10,
};
static const u16 ch_coeff_fmna[] = {
0 x0001, 0 x0003, 0 xfffe, 0 xfff4, 0 x0000, 0 x001f, 0 x000c, 0 xffbc,
0 xffd3, 0 x007d, 0 x0075, 0 xff33, 0 xff01, 0 x0131, 0 x01ef, 0 xfe60,
0 xfc7a, 0 x020e, 0 x0656, 0 xfd94, 0 xf395, 0 x02ab, 0 x2857, 0 x3d3f,
};
static const u16 eq_coeff_fmna1_ra02_m6db[] = {
0 xfff1, 0 xffe1, 0 xffef, 0 x000e, 0 x0030, 0 x002f, 0 xfff6, 0 xffa7,
0 xff9d, 0 x000a, 0 x00a2, 0 x00b5, 0 xffea, 0 xfed9, 0 xfec5, 0 x003d,
0 x0217, 0 x021b, 0 xff5a, 0 xfc2b, 0 xfcbd, 0 x02c4, 0 x0ac3, 0 x0e85,
};
static const u8 adc_presets[2 ][23 ] = {
{
0 x83, 0 x00, 0 xcf, 0 xb4, 0 x0f, 0 x2c, 0 x0c, 0 x49,
0 x00, 0 x00, 0 x00, 0 x8c, 0 x02, 0 x02, 0 x00, 0 x04,
0 xec, 0 x82, 0 x4b, 0 xcc, 0 x01, 0 x88, 0 x0c,
},
{
0 x83, 0 x00, 0 xcf, 0 xb4, 0 x0f, 0 x2c, 0 x0c, 0 x49,
0 x00, 0 x00, 0 x00, 0 x8c, 0 x02, 0 x20, 0 x33, 0 x8c,
0 x57, 0 xd7, 0 x59, 0 xb7, 0 x65, 0 x0e, 0 x0c,
},
};
/* Tuner bands */
static const struct v4l2_frequency_band eu_bands_rf = {
.tuner = 0 ,
.type = V4L2_TUNER_RF,
.index = 0 ,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 65000000 ,
.rangehigh = 240000000 ,
};
static const struct v4l2_frequency_band na_bands_rf = {
.tuner = 0 ,
.type = V4L2_TUNER_RF,
.index = 0 ,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 65000000 ,
.rangehigh = 108000000 ,
};
/* Regmap settings */
static const struct regmap_range max2175_regmap_volatile_range[] = {
regmap_reg_range(0 x30, 0 x35),
regmap_reg_range(0 x3a, 0 x45),
regmap_reg_range(0 x59, 0 x5e),
regmap_reg_range(0 x73, 0 x75),
};
static const struct regmap_access_table max2175_volatile_regs = {
.yes_ranges = max2175_regmap_volatile_range,
.n_yes_ranges = ARRAY_SIZE(max2175_regmap_volatile_range),
};
static const struct reg_default max2175_reg_defaults[] = {
{ 0 x00, 0 x07},
};
static const struct regmap_config max2175_regmap_config = {
.reg_bits = 8 ,
.val_bits = 8 ,
.max_register = 0 xff,
.reg_defaults = max2175_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(max2175_reg_defaults),
.volatile_table = &max2175_volatile_regs,
.cache_type = REGCACHE_MAPLE,
};
struct max2175 {
struct v4l2_subdev sd; /* Sub-device */
struct i2c_client *client; /* I2C client */
/* Controls */
struct v4l2_ctrl_handler ctrl_hdl;
struct v4l2_ctrl *lna_gain; /* LNA gain value */
struct v4l2_ctrl *if_gain; /* I/F gain value */
struct v4l2_ctrl *pll_lock; /* PLL lock */
struct v4l2_ctrl *i2s_en; /* I2S output enable */
struct v4l2_ctrl *hsls; /* High-side/Low-side polarity */
struct v4l2_ctrl *rx_mode; /* Receive mode */
/* Regmap */
struct regmap *regmap;
/* Cached configuration */
u32 freq; /* Tuned freq In Hz */
const struct max2175_rxmode *rx_modes; /* EU or NA modes */
const struct v4l2_frequency_band *bands_rf; /* EU or NA bands */
/* Device settings */
unsigned long xtal_freq; /* Ref Oscillator freq in Hz */
u32 decim_ratio;
bool master; /* Master/Slave */
bool am_hiz; /* AM Hi-Z filter */
/* ROM values */
u8 rom_bbf_bw_am;
u8 rom_bbf_bw_fm;
u8 rom_bbf_bw_dab;
/* Driver private variables */
bool mode_resolved; /* Flag to sanity check settings */
};
static inline struct max2175 *max2175_from_sd(struct v4l2_subdev *sd)
{
return container_of(sd, struct max2175, sd);
}
static inline struct max2175 *max2175_from_ctrl_hdl(struct v4l2_ctrl_handler *h)
{
return container_of(h, struct max2175, ctrl_hdl);
}
/* Get bitval of a given val */
static inline u8 max2175_get_bitval(u8 val, u8 msb, u8 lsb)
{
return (val & GENMASK(msb, lsb)) >> lsb;
}
/* Read/Write bit(s) on top of regmap */
static int max2175_read(struct max2175 *ctx, u8 idx, u8 *val)
{
u32 regval;
int ret;
ret = regmap_read(ctx->regmap, idx, ®val);
if (ret)
mxm_err(ctx, "read ret(%d): idx 0x%02x\n" , ret, idx);
else
*val = regval;
return ret;
}
static int max2175_write(struct max2175 *ctx, u8 idx, u8 val)
{
int ret;
ret = regmap_write(ctx->regmap, idx, val);
if (ret)
mxm_err(ctx, "write ret(%d): idx 0x%02x val 0x%02x\n" ,
ret, idx, val);
return ret;
}
static u8 max2175_read_bits(struct max2175 *ctx, u8 idx, u8 msb, u8 lsb)
{
u8 val;
if (max2175_read(ctx, idx, &val))
return 0 ;
return max2175_get_bitval(val, msb, lsb);
}
static int max2175_write_bits(struct max2175 *ctx, u8 idx,
u8 msb, u8 lsb, u8 newval)
{
int ret = regmap_update_bits(ctx->regmap, idx, GENMASK(msb, lsb),
newval << lsb);
if (ret)
mxm_err(ctx, "wbits ret(%d): idx 0x%02x\n" , ret, idx);
return ret;
}
static int max2175_write_bit(struct max2175 *ctx, u8 idx, u8 bit, u8 newval)
{
return max2175_write_bits(ctx, idx, bit, bit, newval);
}
/* Checks expected pattern every msec until timeout */
static int max2175_poll_timeout(struct max2175 *ctx, u8 idx, u8 msb, u8 lsb,
u8 exp_bitval, u32 timeout_us)
{
unsigned int val;
return regmap_read_poll_timeout(ctx->regmap, idx, val,
(max2175_get_bitval(val, msb, lsb) == exp_bitval),
1000 , timeout_us);
}
static int max2175_poll_csm_ready(struct max2175 *ctx)
{
int ret;
ret = max2175_poll_timeout(ctx, 69 , 1 , 1 , 0 , 50000 );
if (ret)
mxm_err(ctx, "csm not ready\n" );
return ret;
}
#define MAX2175_IS_BAND_AM(ctx) \
(max2175_read_bits(ctx, 5 , 1 , 0 ) == MAX2175_BAND_AM)
#define MAX2175_IS_BAND_VHF(ctx) \
(max2175_read_bits(ctx, 5 , 1 , 0 ) == MAX2175_BAND_VHF)
#define MAX2175_IS_FM_MODE(ctx) \
(max2175_read_bits(ctx, 12 , 5 , 4 ) == 0 )
#define MAX2175_IS_FMHD_MODE(ctx) \
(max2175_read_bits(ctx, 12 , 5 , 4 ) == 1 )
#define MAX2175_IS_DAB_MODE(ctx) \
(max2175_read_bits(ctx, 12 , 5 , 4 ) == 2 )
static int max2175_band_from_freq(u32 freq)
{
if (freq >= 144000 && freq <= 26100000 )
return MAX2175_BAND_AM;
else if (freq >= 65000000 && freq <= 108000000 )
return MAX2175_BAND_FM;
return MAX2175_BAND_VHF;
}
static void max2175_i2s_enable(struct max2175 *ctx, bool enable)
{
if (enable)
/* Stuff bits are zeroed */
max2175_write_bits(ctx, 104 , 3 , 0 , 2 );
else
/* Keep SCK alive */
max2175_write_bits(ctx, 104 , 3 , 0 , 9 );
mxm_dbg(ctx, "i2s %sabled\n" , enable ? "en" : "dis" );
}
static void max2175_set_filter_coeffs(struct max2175 *ctx, u8 m_sel,
u8 bank, const u16 *coeffs)
{
unsigned int i;
u8 coeff_addr, upper_address = 24 ;
mxm_dbg(ctx, "set_filter_coeffs: m_sel %d bank %d\n" , m_sel, bank);
max2175_write_bits(ctx, 114 , 5 , 4 , m_sel);
if (m_sel == 2 )
upper_address = 12 ;
for (i = 0 ; i < upper_address; i++) {
coeff_addr = i + bank * 24 ;
max2175_write(ctx, 115 , coeffs[i] >> 8 );
max2175_write(ctx, 116 , coeffs[i]);
max2175_write(ctx, 117 , coeff_addr | 1 << 7 );
}
max2175_write_bit(ctx, 117 , 7 , 0 );
}
static void max2175_load_fmeu_1p2(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(fmeu1p2_map); i++)
max2175_write(ctx, fmeu1p2_map[i].idx, fmeu1p2_map[i].val);
ctx->decim_ratio = 36 ;
/* Load the Channel Filter Coefficients into channel filter bank #2 */
max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0 , ch_coeff_fmeu);
max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0 ,
eq_coeff_fmeu1_ra02_m6db);
}
static void max2175_load_dab_1p2(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(dab12_map); i++)
max2175_write(ctx, dab12_map[i].idx, dab12_map[i].val);
ctx->decim_ratio = 1 ;
/* Load the Channel Filter Coefficients into channel filter bank #2 */
max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 2 , ch_coeff_dab1);
}
static void max2175_load_fmna_1p0(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(fmna1p0_map); i++)
max2175_write(ctx, fmna1p0_map[i].idx, fmna1p0_map[i].val);
}
static void max2175_load_fmna_2p0(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(fmna2p0_map); i++)
max2175_write(ctx, fmna2p0_map[i].idx, fmna2p0_map[i].val);
}
static void max2175_set_bbfilter(struct max2175 *ctx)
{
if (MAX2175_IS_BAND_AM(ctx)) {
max2175_write_bits(ctx, 12 , 3 , 0 , ctx->rom_bbf_bw_am);
mxm_dbg(ctx, "set_bbfilter AM: rom %d\n" , ctx->rom_bbf_bw_am);
} else if (MAX2175_IS_DAB_MODE(ctx)) {
max2175_write_bits(ctx, 12 , 3 , 0 , ctx->rom_bbf_bw_dab);
mxm_dbg(ctx, "set_bbfilter DAB: rom %d\n" , ctx->rom_bbf_bw_dab);
} else {
max2175_write_bits(ctx, 12 , 3 , 0 , ctx->rom_bbf_bw_fm);
mxm_dbg(ctx, "set_bbfilter FM: rom %d\n" , ctx->rom_bbf_bw_fm);
}
}
static int max2175_set_csm_mode(struct max2175 *ctx,
enum max2175_csm_mode new_mode)
{
int ret = max2175_poll_csm_ready(ctx);
if (ret)
return ret;
max2175_write_bits(ctx, 0 , 2 , 0 , new_mode);
mxm_dbg(ctx, "set csm new mode %d\n" , new_mode);
/* Wait for a fixed settle down time depending on new mode */
switch (new_mode) {
case MAX2175_PRESET_TUNE:
usleep_range(51100 , 51500 ); /* 51.1ms */
break ;
/*
* Other mode switches need different sleep values depending on band &
* mode
*/
default :
break ;
}
return max2175_poll_csm_ready(ctx);
}
static int max2175_csm_action(struct max2175 *ctx,
enum max2175_csm_mode action)
{
int ret;
mxm_dbg(ctx, "csm_action: %d\n" , action);
/* Other actions can be added in future when needed */
ret = max2175_set_csm_mode(ctx, MAX2175_LOAD_TO_BUFFER);
if (ret)
return ret;
return max2175_set_csm_mode(ctx, MAX2175_PRESET_TUNE);
}
static int max2175_set_lo_freq(struct max2175 *ctx, u32 lo_freq)
{
u8 lo_mult, loband_bits = 0 , vcodiv_bits = 0 ;
u32 int_desired, frac_desired;
enum max2175_band band;
int ret;
band = max2175_read_bits(ctx, 5 , 1 , 0 );
switch (band) {
case MAX2175_BAND_AM:
lo_mult = 16 ;
break ;
case MAX2175_BAND_FM:
if (lo_freq <= 74700000 ) {
lo_mult = 16 ;
} else if (lo_freq > 74700000 && lo_freq <= 110000000 ) {
loband_bits = 1 ;
lo_mult = 8 ;
} else {
loband_bits = 1 ;
vcodiv_bits = 3 ;
lo_mult = 8 ;
}
break ;
case MAX2175_BAND_VHF:
if (lo_freq <= 210000000 )
vcodiv_bits = 2 ;
else
vcodiv_bits = 1 ;
loband_bits = 2 ;
lo_mult = 4 ;
break ;
default :
loband_bits = 3 ;
vcodiv_bits = 2 ;
lo_mult = 2 ;
break ;
}
if (band == MAX2175_BAND_L)
lo_freq /= lo_mult;
else
lo_freq *= lo_mult;
int_desired = lo_freq / ctx->xtal_freq;
frac_desired = div64_ul((u64)(lo_freq % ctx->xtal_freq) << 20 ,
ctx->xtal_freq);
/* Check CSM is not busy */
ret = max2175_poll_csm_ready(ctx);
if (ret)
return ret;
mxm_dbg(ctx, "lo_mult %u int %u frac %u\n" ,
lo_mult, int_desired, frac_desired);
/* Write the calculated values to the appropriate registers */
max2175_write(ctx, 1 , int_desired);
max2175_write_bits(ctx, 2 , 3 , 0 , (frac_desired >> 16 ) & 0 xf);
max2175_write(ctx, 3 , frac_desired >> 8 );
max2175_write(ctx, 4 , frac_desired);
max2175_write_bits(ctx, 5 , 3 , 2 , loband_bits);
max2175_write_bits(ctx, 6 , 7 , 6 , vcodiv_bits);
return ret;
}
/*
* Helper similar to DIV_ROUND_CLOSEST but an inline function that accepts s64
* dividend and s32 divisor
*/
static inline s64 max2175_round_closest(s64 dividend, s32 divisor)
{
if ((dividend > 0 && divisor > 0 ) || (dividend < 0 && divisor < 0 ))
return div_s64(dividend + divisor / 2 , divisor);
return div_s64(dividend - divisor / 2 , divisor);
}
static int max2175_set_nco_freq(struct max2175 *ctx, s32 nco_freq)
{
s32 clock_rate = ctx->xtal_freq / ctx->decim_ratio;
u32 nco_reg, abs_nco_freq = abs(nco_freq);
s64 nco_val_desired;
int ret;
if (abs_nco_freq < clock_rate / 2 ) {
nco_val_desired = 2 * nco_freq;
} else {
nco_val_desired = 2 LL * (clock_rate - abs_nco_freq);
if (nco_freq < 0 )
nco_val_desired = -nco_val_desired;
}
nco_reg = max2175_round_closest(nco_val_desired << 20 , clock_rate);
if (nco_freq < 0 )
nco_reg += 0 x200000;
/* Check CSM is not busy */
ret = max2175_poll_csm_ready(ctx);
if (ret)
return ret;
mxm_dbg(ctx, "freq %d desired %lld reg %u\n" ,
nco_freq, nco_val_desired, nco_reg);
/* Write the calculated values to the appropriate registers */
max2175_write_bits(ctx, 7 , 4 , 0 , (nco_reg >> 16 ) & 0 x1f);
max2175_write(ctx, 8 , nco_reg >> 8 );
max2175_write(ctx, 9 , nco_reg);
return ret;
}
static int max2175_set_rf_freq_non_am_bands(struct max2175 *ctx, u64 freq,
u32 lo_pos)
{
s64 adj_freq, low_if_freq;
int ret;
mxm_dbg(ctx, "rf_freq: non AM bands\n" );
if (MAX2175_IS_FM_MODE(ctx))
low_if_freq = 128000 ;
else if (MAX2175_IS_FMHD_MODE(ctx))
low_if_freq = 228000 ;
else
return max2175_set_lo_freq(ctx, freq);
if (MAX2175_IS_BAND_VHF(ctx) == (lo_pos == MAX2175_LO_ABOVE_DESIRED))
adj_freq = freq + low_if_freq;
else
adj_freq = freq - low_if_freq;
ret = max2175_set_lo_freq(ctx, adj_freq);
if (ret)
return ret;
return max2175_set_nco_freq(ctx, -low_if_freq);
}
static int max2175_set_rf_freq(struct max2175 *ctx, u64 freq, u32 lo_pos)
{
int ret;
if (MAX2175_IS_BAND_AM(ctx))
ret = max2175_set_nco_freq(ctx, freq);
else
ret = max2175_set_rf_freq_non_am_bands(ctx, freq, lo_pos);
mxm_dbg(ctx, "set_rf_freq: ret %d freq %llu\n" , ret, freq);
return ret;
}
static int max2175_tune_rf_freq(struct max2175 *ctx, u64 freq, u32 hsls)
{
int ret;
ret = max2175_set_rf_freq(ctx, freq, hsls);
if (ret)
return ret;
ret = max2175_csm_action(ctx, MAX2175_BUFFER_PLUS_PRESET_TUNE);
if (ret)
return ret;
mxm_dbg(ctx, "tune_rf_freq: old %u new %llu\n" , ctx->freq, freq);
ctx->freq = freq;
return ret;
}
static void max2175_set_hsls(struct max2175 *ctx, u32 lo_pos)
{
mxm_dbg(ctx, "set_hsls: lo_pos %u\n" , lo_pos);
if ((lo_pos == MAX2175_LO_BELOW_DESIRED) == MAX2175_IS_BAND_VHF(ctx))
max2175_write_bit(ctx, 5 , 4 , 1 );
else
max2175_write_bit(ctx, 5 , 4 , 0 );
}
static void max2175_set_eu_rx_mode(struct max2175 *ctx, u32 rx_mode)
{
switch (rx_mode) {
case MAX2175_EU_FM_1_2:
max2175_load_fmeu_1p2(ctx);
break ;
case MAX2175_DAB_1_2:
max2175_load_dab_1p2(ctx);
break ;
}
/* Master is the default setting */
if (!ctx->master)
max2175_write_bit(ctx, 30 , 7 , 1 );
}
static void max2175_set_na_rx_mode(struct max2175 *ctx, u32 rx_mode)
{
switch (rx_mode) {
case MAX2175_NA_FM_1_0:
max2175_load_fmna_1p0(ctx);
break ;
case MAX2175_NA_FM_2_0:
max2175_load_fmna_2p0(ctx);
break ;
}
/* Master is the default setting */
if (!ctx->master)
max2175_write_bit(ctx, 30 , 7 , 1 );
ctx->decim_ratio = 27 ;
/* Load the Channel Filter Coefficients into channel filter bank #2 */
max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0 , ch_coeff_fmna);
max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0 ,
eq_coeff_fmna1_ra02_m6db);
}
static int max2175_set_rx_mode(struct max2175 *ctx, u32 rx_mode)
{
mxm_dbg(ctx, "set_rx_mode: %u am_hiz %u\n" , rx_mode, ctx->am_hiz);
if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ)
max2175_set_eu_rx_mode(ctx, rx_mode);
else
max2175_set_na_rx_mode(ctx, rx_mode);
if (ctx->am_hiz) {
mxm_dbg(ctx, "setting AM HiZ related config\n" );
max2175_write_bit(ctx, 50 , 5 , 1 );
max2175_write_bit(ctx, 90 , 7 , 1 );
max2175_write_bits(ctx, 73 , 1 , 0 , 2 );
max2175_write_bits(ctx, 80 , 5 , 0 , 33 );
}
/* Load BB filter trim values saved in ROM */
max2175_set_bbfilter(ctx);
/* Set HSLS */
max2175_set_hsls(ctx, ctx->hsls->cur.val);
/* Use i2s enable settings */
max2175_i2s_enable(ctx, ctx->i2s_en->cur.val);
ctx->mode_resolved = true ;
return 0 ;
}
static int max2175_rx_mode_from_freq(struct max2175 *ctx, u32 freq, u32 *mode)
{
unsigned int i;
int band = max2175_band_from_freq(freq);
/* Pick the first match always */
for (i = 0 ; i <= ctx->rx_mode->maximum; i++) {
if (ctx->rx_modes[i].band == band) {
*mode = i;
mxm_dbg(ctx, "rx_mode_from_freq: freq %u mode %d\n" ,
freq, *mode);
return 0 ;
}
}
return -EINVAL;
}
static bool max2175_freq_rx_mode_valid(struct max2175 *ctx,
u32 mode, u32 freq)
{
int band = max2175_band_from_freq(freq);
return (ctx->rx_modes[mode].band == band);
}
static void max2175_load_adc_presets(struct max2175 *ctx)
{
unsigned int i, j;
for (i = 0 ; i < ARRAY_SIZE(adc_presets); i++)
for (j = 0 ; j < ARRAY_SIZE(adc_presets[0 ]); j++)
max2175_write(ctx, 146 + j + i * 55 , adc_presets[i][j]);
}
static int max2175_init_power_manager(struct max2175 *ctx)
{
int ret;
/* Execute on-chip power-up/calibration */
max2175_write_bit(ctx, 99 , 2 , 0 );
usleep_range(1000 , 1500 );
max2175_write_bit(ctx, 99 , 2 , 1 );
/* Wait for the power manager to finish. */
ret = max2175_poll_timeout(ctx, 69 , 7 , 7 , 1 , 50000 );
if (ret)
mxm_err(ctx, "init pm failed\n" );
return ret;
}
static int max2175_recalibrate_adc(struct max2175 *ctx)
{
int ret;
/* ADC Re-calibration */
max2175_write(ctx, 150 , 0 xff);
max2175_write(ctx, 205 , 0 xff);
max2175_write(ctx, 147 , 0 x20);
max2175_write(ctx, 147 , 0 x00);
max2175_write(ctx, 202 , 0 x20);
max2175_write(ctx, 202 , 0 x00);
ret = max2175_poll_timeout(ctx, 69 , 4 , 3 , 3 , 50000 );
if (ret)
mxm_err(ctx, "adc recalibration failed\n" );
return ret;
}
static u8 max2175_read_rom(struct max2175 *ctx, u8 row)
{
u8 data = 0 ;
max2175_write_bit(ctx, 56 , 4 , 0 );
max2175_write_bits(ctx, 56 , 3 , 0 , row);
usleep_range(2000 , 2500 );
max2175_read(ctx, 58 , &data);
max2175_write_bits(ctx, 56 , 3 , 0 , 0 );
mxm_dbg(ctx, "read_rom: row %d data 0x%02x\n" , row, data);
return data;
}
static void max2175_load_from_rom(struct max2175 *ctx)
{
u8 data = 0 ;
data = max2175_read_rom(ctx, 0 );
ctx->rom_bbf_bw_am = data & 0 x0f;
max2175_write_bits(ctx, 81 , 3 , 0 , data >> 4 );
data = max2175_read_rom(ctx, 1 );
ctx->rom_bbf_bw_fm = data & 0 x0f;
ctx->rom_bbf_bw_dab = data >> 4 ;
data = max2175_read_rom(ctx, 2 );
max2175_write_bits(ctx, 82 , 4 , 0 , data & 0 x1f);
max2175_write_bits(ctx, 82 , 7 , 5 , data >> 5 );
data = max2175_read_rom(ctx, 3 );
if (ctx->am_hiz) {
data &= 0 x0f;
data |= (max2175_read_rom(ctx, 7 ) & 0 x40) >> 2 ;
if (!data)
data |= 2 ;
} else {
data = (data & 0 xf0) >> 4 ;
data |= (max2175_read_rom(ctx, 7 ) & 0 x80) >> 3 ;
if (!data)
data |= 30 ;
}
max2175_write_bits(ctx, 80 , 5 , 0 , data + 31 );
data = max2175_read_rom(ctx, 6 );
max2175_write_bits(ctx, 81 , 7 , 6 , data >> 6 );
}
static void max2175_load_full_fm_eu_1p0(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(full_fm_eu_1p0); i++)
max2175_write(ctx, i + 1 , full_fm_eu_1p0[i]);
usleep_range(5000 , 5500 );
ctx->decim_ratio = 36 ;
}
static void max2175_load_full_fm_na_1p0(struct max2175 *ctx)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(full_fm_na_1p0); i++)
max2175_write(ctx, i + 1 , full_fm_na_1p0[i]);
usleep_range(5000 , 5500 );
ctx->decim_ratio = 27 ;
}
static int max2175_core_init(struct max2175 *ctx, u32 refout_bits)
{
int ret;
/* MAX2175 uses 36.864MHz clock for EU & 40.154MHz for NA region */
if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ)
max2175_load_full_fm_eu_1p0(ctx);
else
max2175_load_full_fm_na_1p0(ctx);
/* The default settings assume master */
if (!ctx->master)
max2175_write_bit(ctx, 30 , 7 , 1 );
mxm_dbg(ctx, "refout_bits %u\n" , refout_bits);
/* Set REFOUT */
max2175_write_bits(ctx, 56 , 7 , 5 , refout_bits);
/* ADC Reset */
max2175_write_bit(ctx, 99 , 1 , 0 );
usleep_range(1000 , 1500 );
max2175_write_bit(ctx, 99 , 1 , 1 );
/* Load ADC preset values */
max2175_load_adc_presets(ctx);
/* Initialize the power management state machine */
ret = max2175_init_power_manager(ctx);
if (ret)
return ret;
/* Recalibrate ADC */
ret = max2175_recalibrate_adc(ctx);
if (ret)
return ret;
/* Load ROM values to appropriate registers */
max2175_load_from_rom(ctx);
if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ) {
/* Load FIR coefficients into bank 0 */
max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0 ,
ch_coeff_fmeu);
max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0 ,
eq_coeff_fmeu1_ra02_m6db);
} else {
/* Load FIR coefficients into bank 0 */
max2175_set_filter_coeffs(ctx, MAX2175_CH_MSEL, 0 ,
ch_coeff_fmna);
max2175_set_filter_coeffs(ctx, MAX2175_EQ_MSEL, 0 ,
eq_coeff_fmna1_ra02_m6db);
}
mxm_dbg(ctx, "core initialized\n" );
return 0 ;
}
static void max2175_s_ctrl_rx_mode(struct max2175 *ctx, u32 rx_mode)
{
/* Load mode. Range check already done */
max2175_set_rx_mode(ctx, rx_mode);
mxm_dbg(ctx, "s_ctrl_rx_mode: %u curr freq %u\n" , rx_mode, ctx->freq);
/* Check if current freq valid for mode & update */
if (max2175_freq_rx_mode_valid(ctx, rx_mode, ctx->freq))
max2175_tune_rf_freq(ctx, ctx->freq, ctx->hsls->cur.val);
else
/* Use default freq of mode if current freq is not valid */
max2175_tune_rf_freq(ctx, ctx->rx_modes[rx_mode].freq,
ctx->hsls->cur.val);
}
static int max2175_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct max2175 *ctx = max2175_from_ctrl_hdl(ctrl->handler);
mxm_dbg(ctx, "s_ctrl: id 0x%x, val %u\n" , ctrl->id, ctrl->val);
switch (ctrl->id) {
case V4L2_CID_MAX2175_I2S_ENABLE:
max2175_i2s_enable(ctx, ctrl->val);
break ;
case V4L2_CID_MAX2175_HSLS:
max2175_set_hsls(ctx, ctrl->val);
break ;
case V4L2_CID_MAX2175_RX_MODE:
max2175_s_ctrl_rx_mode(ctx, ctrl->val);
break ;
}
return 0 ;
}
static u32 max2175_get_lna_gain(struct max2175 *ctx)
{
enum max2175_band band = max2175_read_bits(ctx, 5 , 1 , 0 );
switch (band) {
case MAX2175_BAND_AM:
return max2175_read_bits(ctx, 51 , 3 , 0 );
case MAX2175_BAND_FM:
return max2175_read_bits(ctx, 50 , 3 , 0 );
case MAX2175_BAND_VHF:
return max2175_read_bits(ctx, 52 , 5 , 0 );
default :
return 0 ;
}
}
static int max2175_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct max2175 *ctx = max2175_from_ctrl_hdl(ctrl->handler);
switch (ctrl->id) {
case V4L2_CID_RF_TUNER_LNA_GAIN:
ctrl->val = max2175_get_lna_gain(ctx);
break ;
case V4L2_CID_RF_TUNER_IF_GAIN:
ctrl->val = max2175_read_bits(ctx, 49 , 4 , 0 );
break ;
case V4L2_CID_RF_TUNER_PLL_LOCK:
ctrl->val = (max2175_read_bits(ctx, 60 , 7 , 6 ) == 3 );
break ;
}
return 0 ;
};
static int max2175_set_freq_and_mode(struct max2175 *ctx, u32 freq)
{
u32 rx_mode;
int ret;
/* Get band from frequency */
ret = max2175_rx_mode_from_freq(ctx, freq, &rx_mode);
if (ret)
return ret;
mxm_dbg(ctx, "set_freq_and_mode: freq %u rx_mode %d\n" , freq, rx_mode);
/* Load mode */
max2175_set_rx_mode(ctx, rx_mode);
ctx->rx_mode->cur.val = rx_mode;
/* Tune to the new freq given */
return max2175_tune_rf_freq(ctx, freq, ctx->hsls->cur.val);
}
static int max2175_s_frequency(struct v4l2_subdev *sd,
const struct v4l2_frequency *vf)
{
struct max2175 *ctx = max2175_from_sd(sd);
u32 freq;
int ret = 0 ;
mxm_dbg(ctx, "s_freq: new %u curr %u, mode_resolved %d\n" ,
vf->frequency, ctx->freq, ctx->mode_resolved);
if (vf->tuner != 0 )
return -EINVAL;
freq = clamp(vf->frequency, ctx->bands_rf->rangelow,
ctx->bands_rf->rangehigh);
/* Check new freq valid for rx_mode if already resolved */
if (ctx->mode_resolved &&
max2175_freq_rx_mode_valid(ctx, ctx->rx_mode->cur.val, freq))
ret = max2175_tune_rf_freq(ctx, freq, ctx->hsls->cur.val);
else
/* Find default rx_mode for freq and tune to it */
ret = max2175_set_freq_and_mode(ctx, freq);
mxm_dbg(ctx, "s_freq: ret %d curr %u mode_resolved %d mode %u\n" ,
ret, ctx->freq, ctx->mode_resolved, ctx->rx_mode->cur.val);
return ret;
}
static int max2175_g_frequency(struct v4l2_subdev *sd,
struct v4l2_frequency *vf)
{
struct max2175 *ctx = max2175_from_sd(sd);
if (vf->tuner != 0 )
return -EINVAL;
/* RF freq */
vf->type = V4L2_TUNER_RF;
vf->frequency = ctx->freq;
return 0 ;
}
static int max2175_enum_freq_bands(struct v4l2_subdev *sd,
struct v4l2_frequency_band *band)
{
struct max2175 *ctx = max2175_from_sd(sd);
if (band->tuner != 0 || band->index != 0 )
return -EINVAL;
*band = *ctx->bands_rf;
return 0 ;
}
static int max2175_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct max2175 *ctx = max2175_from_sd(sd);
if (vt->index > 0 )
return -EINVAL;
strscpy(vt->name, "RF" , sizeof (vt->name));
vt->type = V4L2_TUNER_RF;
vt->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
vt->rangelow = ctx->bands_rf->rangelow;
vt->rangehigh = ctx->bands_rf->rangehigh;
return 0 ;
}
static int max2175_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
{
/* Check tuner index is valid */
if (vt->index > 0 )
return -EINVAL;
return 0 ;
}
static const struct v4l2_subdev_tuner_ops max2175_tuner_ops = {
.s_frequency = max2175_s_frequency,
.g_frequency = max2175_g_frequency,
.enum_freq_bands = max2175_enum_freq_bands,
.g_tuner = max2175_g_tuner,
.s_tuner = max2175_s_tuner,
};
static const struct v4l2_subdev_ops max2175_ops = {
.tuner = &max2175_tuner_ops,
};
static const struct v4l2_ctrl_ops max2175_ctrl_ops = {
.s_ctrl = max2175_s_ctrl,
.g_volatile_ctrl = max2175_g_volatile_ctrl,
};
/*
* I2S output enable/disable configuration. This is a private control.
* Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
*/
static const struct v4l2_ctrl_config max2175_i2s_en = {
.ops = &max2175_ctrl_ops,
.id = V4L2_CID_MAX2175_I2S_ENABLE,
.name = "I2S Enable" ,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.min = 0 ,
.max = 1 ,
.step = 1 ,
.def = 1 ,
.is_private = 1 ,
};
/*
* HSLS value control LO freq adjacent location configuration.
* Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
*/
static const struct v4l2_ctrl_config max2175_hsls = {
.ops = &max2175_ctrl_ops,
.id = V4L2_CID_MAX2175_HSLS,
.name = "HSLS Above/Below Desired" ,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.min = 0 ,
.max = 1 ,
.step = 1 ,
.def = 1 ,
};
/*
* Rx modes below are a set of preset configurations that decides the tuner's
* sck and sample rate of transmission. They are separate for EU & NA regions.
* Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
*/
static const char * const max2175_ctrl_eu_rx_modes[] = {
[MAX2175_EU_FM_1_2] = "EU FM 1.2" ,
[MAX2175_DAB_1_2] = "DAB 1.2" ,
};
static const char * const max2175_ctrl_na_rx_modes[] = {
[MAX2175_NA_FM_1_0] = "NA FM 1.0" ,
[MAX2175_NA_FM_2_0] = "NA FM 2.0" ,
};
static const struct v4l2_ctrl_config max2175_eu_rx_mode = {
.ops = &max2175_ctrl_ops,
.id = V4L2_CID_MAX2175_RX_MODE,
.name = "RX Mode" ,
.type = V4L2_CTRL_TYPE_MENU,
.max = ARRAY_SIZE(max2175_ctrl_eu_rx_modes) - 1 ,
.def = 0 ,
.qmenu = max2175_ctrl_eu_rx_modes,
};
static const struct v4l2_ctrl_config max2175_na_rx_mode = {
.ops = &max2175_ctrl_ops,
.id = V4L2_CID_MAX2175_RX_MODE,
.name = "RX Mode" ,
.type = V4L2_CTRL_TYPE_MENU,
.max = ARRAY_SIZE(max2175_ctrl_na_rx_modes) - 1 ,
.def = 0 ,
.qmenu = max2175_ctrl_na_rx_modes,
};
static int max2175_refout_load_to_bits(struct i2c_client *client, u32 load,
u32 *bits)
{
if (load <= 40 )
*bits = load / 10 ;
else if (load >= 60 && load <= 70 )
*bits = load / 10 - 1 ;
else
return -EINVAL;
return 0 ;
}
static int max2175_probe(struct i2c_client *client)
{
bool master = true , am_hiz = false ;
u32 refout_load, refout_bits = 0 ; /* REFOUT disabled */
struct v4l2_ctrl_handler *hdl;
struct fwnode_handle *fwnode;
struct device_node *np;
struct v4l2_subdev *sd;
struct regmap *regmap;
struct max2175 *ctx;
struct clk *clk;
int ret;
/* Parse DT properties */
np = of_parse_phandle(client->dev.of_node, "maxim,master" , 0 );
if (np) {
master = false ; /* Slave tuner */
of_node_put(np);
}
fwnode = of_fwnode_handle(client->dev.of_node);
if (fwnode_property_present(fwnode, "maxim,am-hiz-filter" ))
am_hiz = true ;
if (!fwnode_property_read_u32(fwnode, "maxim,refout-load" ,
&refout_load)) {
ret = max2175_refout_load_to_bits(client, refout_load,
&refout_bits);
if (ret) {
dev_err(&client->dev, "invalid refout_load %u\n" ,
refout_load);
return -EINVAL;
}
}
clk = devm_clk_get(&client->dev, NULL);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
dev_err(&client->dev, "cannot get clock %d\n" , ret);
return ret;
}
regmap = devm_regmap_init_i2c(client, &max2175_regmap_config);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(&client->dev, "regmap init failed %d\n" , ret);
return -ENODEV;
}
/* Alloc tuner context */
ctx = devm_kzalloc(&client->dev, sizeof (*ctx), GFP_KERNEL);
if (ctx == NULL)
return -ENOMEM;
sd = &ctx->sd;
ctx->master = master;
ctx->am_hiz = am_hiz;
ctx->mode_resolved = false ;
ctx->regmap = regmap;
ctx->xtal_freq = clk_get_rate(clk);
dev_info(&client->dev, "xtal freq %luHz\n" , ctx->xtal_freq);
v4l2_i2c_subdev_init(sd, client, &max2175_ops);
ctx->client = client;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
/* Controls */
hdl = &ctx->ctrl_hdl;
ret = v4l2_ctrl_handler_init(hdl, 7 );
if (ret)
return ret;
ctx->lna_gain = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops,
V4L2_CID_RF_TUNER_LNA_GAIN,
0 , 63 , 1 , 0 );
ctx->lna_gain->flags |= (V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY);
ctx->if_gain = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops,
V4L2_CID_RF_TUNER_IF_GAIN,
0 , 31 , 1 , 0 );
ctx->if_gain->flags |= (V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY);
ctx->pll_lock = v4l2_ctrl_new_std(hdl, &max2175_ctrl_ops,
V4L2_CID_RF_TUNER_PLL_LOCK,
0 , 1 , 1 , 0 );
ctx->pll_lock->flags |= (V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY);
ctx->i2s_en = v4l2_ctrl_new_custom(hdl, &max2175_i2s_en, NULL);
ctx->hsls = v4l2_ctrl_new_custom(hdl, &max2175_hsls, NULL);
if (ctx->xtal_freq == MAX2175_EU_XTAL_FREQ) {
ctx->rx_mode = v4l2_ctrl_new_custom(hdl,
&max2175_eu_rx_mode, NULL);
ctx->rx_modes = eu_rx_modes;
ctx->bands_rf = &eu_bands_rf;
} else {
ctx->rx_mode = v4l2_ctrl_new_custom(hdl,
&max2175_na_rx_mode, NULL);
ctx->rx_modes = na_rx_modes;
ctx->bands_rf = &na_bands_rf;
}
ctx->sd.ctrl_handler = &ctx->ctrl_hdl;
/* Set the defaults */
ctx->freq = ctx->bands_rf->rangelow;
/* Register subdev */
ret = v4l2_async_register_subdev(sd);
if (ret) {
dev_err(&client->dev, "register subdev failed\n" );
goto err_reg;
}
/* Initialize device */
ret = max2175_core_init(ctx, refout_bits);
if (ret)
goto err_init;
ret = v4l2_ctrl_handler_setup(hdl);
if (ret)
goto err_init;
return 0 ;
err_init:
v4l2_async_unregister_subdev(sd);
err_reg:
v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
return ret;
}
static void max2175_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct max2175 *ctx = max2175_from_sd(sd);
v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
v4l2_async_unregister_subdev(sd);
}
static const struct i2c_device_id max2175_id[] = {
{ DRIVER_NAME },
{}
};
MODULE_DEVICE_TABLE(i2c, max2175_id);
static const struct of_device_id max2175_of_ids[] = {
{ .compatible = "maxim,max2175" , },
{ }
};
MODULE_DEVICE_TABLE(of, max2175_of_ids);
static struct i2c_driver max2175_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = max2175_of_ids,
},
.probe = max2175_probe,
.remove = max2175_remove,
.id_table = max2175_id,
};
module_i2c_driver(max2175_driver);
MODULE_DESCRIPTION("Maxim MAX2175 RF to Bits tuner driver" );
MODULE_LICENSE("GPL v2" );
MODULE_AUTHOR("Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>" );
Messung V0.5 in Prozent C=95 H=94 G=94
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-06-08)
¤
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