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- /*
- * 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
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * 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/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[] = {
- 0x15, 0x04, 0xb8, 0xe3, 0x35, 0x18, 0x7c, 0x00,
- 0x00, 0x7d, 0x40, 0x08, 0x70, 0x7a, 0x88, 0x91,
- 0x61, 0x61, 0x61, 0x61, 0x5a, 0x0f, 0x34, 0x1c,
- 0x14, 0x88, 0x33, 0x02, 0x00, 0x09, 0x00, 0x65,
- 0x9f, 0x2b, 0x80, 0x00, 0x95, 0x05, 0x2c, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
- 0x4a, 0x08, 0xa8, 0x0e, 0x0e, 0x2f, 0x7e, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0xab, 0x5e, 0xa9,
- 0xae, 0xbb, 0x57, 0x18, 0x3b, 0x03, 0x3b, 0x64,
- 0x40, 0x60, 0x00, 0x2a, 0xbf, 0x3f, 0xff, 0x9f,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00,
- 0xff, 0xfc, 0xef, 0x1c, 0x40, 0x00, 0x00, 0x02,
- 0x00, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0xac, 0x40, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00,
- 0x00, 0x47, 0x00, 0x00, 0x11, 0x3f, 0x22, 0x00,
- 0xf1, 0x00, 0x41, 0x03, 0xb0, 0x00, 0x00, 0x00,
- 0x1b,
- };
- static const u8 full_fm_na_1p0[] = {
- 0x13, 0x08, 0x8d, 0xc0, 0x35, 0x18, 0x7d, 0x3f,
- 0x7d, 0x75, 0x40, 0x08, 0x70, 0x7a, 0x88, 0x91,
- 0x61, 0x61, 0x61, 0x61, 0x5c, 0x0f, 0x34, 0x1c,
- 0x14, 0x88, 0x33, 0x02, 0x00, 0x01, 0x00, 0x65,
- 0x9f, 0x2b, 0x80, 0x00, 0x95, 0x05, 0x2c, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
- 0x4a, 0x08, 0xa8, 0x0e, 0x0e, 0xaf, 0x7e, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0xab, 0x5e, 0xa9,
- 0xae, 0xbb, 0x57, 0x18, 0x3b, 0x03, 0x3b, 0x64,
- 0x40, 0x60, 0x00, 0x2a, 0xbf, 0x3f, 0xff, 0x9f,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00,
- 0xff, 0xfc, 0xef, 0x1c, 0x40, 0x00, 0x00, 0x02,
- 0x00, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0xa6, 0x40, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00,
- 0x00, 0x35, 0x00, 0x00, 0x11, 0x3f, 0x22, 0x00,
- 0xf1, 0x00, 0x41, 0x03, 0xb0, 0x00, 0x00, 0x00,
- 0x1b,
- };
- /* DAB1.2 settings */
- static const struct max2175_reg_map dab12_map[] = {
- { 0x01, 0x13 }, { 0x02, 0x0d }, { 0x03, 0x15 }, { 0x04, 0x55 },
- { 0x05, 0x0a }, { 0x06, 0xa0 }, { 0x07, 0x40 }, { 0x08, 0x00 },
- { 0x09, 0x00 }, { 0x0a, 0x7d }, { 0x0b, 0x4a }, { 0x0c, 0x28 },
- { 0x0e, 0x43 }, { 0x0f, 0xb5 }, { 0x10, 0x31 }, { 0x11, 0x9e },
- { 0x12, 0x68 }, { 0x13, 0x9e }, { 0x14, 0x68 }, { 0x15, 0x58 },
- { 0x16, 0x2f }, { 0x17, 0x3f }, { 0x18, 0x40 }, { 0x1a, 0x88 },
- { 0x1b, 0xaa }, { 0x1c, 0x9a }, { 0x1d, 0x00 }, { 0x1e, 0x00 },
- { 0x23, 0x80 }, { 0x24, 0x00 }, { 0x25, 0x00 }, { 0x26, 0x00 },
- { 0x27, 0x00 }, { 0x32, 0x08 }, { 0x33, 0xf8 }, { 0x36, 0x2d },
- { 0x37, 0x7e }, { 0x55, 0xaf }, { 0x56, 0x3f }, { 0x57, 0xf8 },
- { 0x58, 0x99 }, { 0x76, 0x00 }, { 0x77, 0x00 }, { 0x78, 0x02 },
- { 0x79, 0x40 }, { 0x82, 0x00 }, { 0x83, 0x00 }, { 0x85, 0x00 },
- { 0x86, 0x20 },
- };
- /* EU FM 1.2 settings */
- static const struct max2175_reg_map fmeu1p2_map[] = {
- { 0x01, 0x15 }, { 0x02, 0x04 }, { 0x03, 0xb8 }, { 0x04, 0xe3 },
- { 0x05, 0x35 }, { 0x06, 0x18 }, { 0x07, 0x7c }, { 0x08, 0x00 },
- { 0x09, 0x00 }, { 0x0a, 0x73 }, { 0x0b, 0x40 }, { 0x0c, 0x08 },
- { 0x0e, 0x7a }, { 0x0f, 0x88 }, { 0x10, 0x91 }, { 0x11, 0x61 },
- { 0x12, 0x61 }, { 0x13, 0x61 }, { 0x14, 0x61 }, { 0x15, 0x5a },
- { 0x16, 0x0f }, { 0x17, 0x34 }, { 0x18, 0x1c }, { 0x1a, 0x88 },
- { 0x1b, 0x33 }, { 0x1c, 0x02 }, { 0x1d, 0x00 }, { 0x1e, 0x01 },
- { 0x23, 0x80 }, { 0x24, 0x00 }, { 0x25, 0x95 }, { 0x26, 0x05 },
- { 0x27, 0x2c }, { 0x32, 0x08 }, { 0x33, 0xa8 }, { 0x36, 0x2f },
- { 0x37, 0x7e }, { 0x55, 0xbf }, { 0x56, 0x3f }, { 0x57, 0xff },
- { 0x58, 0x9f }, { 0x76, 0xac }, { 0x77, 0x40 }, { 0x78, 0x00 },
- { 0x79, 0x00 }, { 0x82, 0x47 }, { 0x83, 0x00 }, { 0x85, 0x11 },
- { 0x86, 0x3f },
- };
- /* FM NA 1.0 settings */
- static const struct max2175_reg_map fmna1p0_map[] = {
- { 0x01, 0x13 }, { 0x02, 0x08 }, { 0x03, 0x8d }, { 0x04, 0xc0 },
- { 0x05, 0x35 }, { 0x06, 0x18 }, { 0x07, 0x7d }, { 0x08, 0x3f },
- { 0x09, 0x7d }, { 0x0a, 0x75 }, { 0x0b, 0x40 }, { 0x0c, 0x08 },
- { 0x0e, 0x7a }, { 0x0f, 0x88 }, { 0x10, 0x91 }, { 0x11, 0x61 },
- { 0x12, 0x61 }, { 0x13, 0x61 }, { 0x14, 0x61 }, { 0x15, 0x5c },
- { 0x16, 0x0f }, { 0x17, 0x34 }, { 0x18, 0x1c }, { 0x1a, 0x88 },
- { 0x1b, 0x33 }, { 0x1c, 0x02 }, { 0x1d, 0x00 }, { 0x1e, 0x01 },
- { 0x23, 0x80 }, { 0x24, 0x00 }, { 0x25, 0x95 }, { 0x26, 0x05 },
- { 0x27, 0x2c }, { 0x32, 0x08 }, { 0x33, 0xa8 }, { 0x36, 0xaf },
- { 0x37, 0x7e }, { 0x55, 0xbf }, { 0x56, 0x3f }, { 0x57, 0xff },
- { 0x58, 0x9f }, { 0x76, 0xa6 }, { 0x77, 0x40 }, { 0x78, 0x00 },
- { 0x79, 0x00 }, { 0x82, 0x35 }, { 0x83, 0x00 }, { 0x85, 0x11 },
- { 0x86, 0x3f },
- };
- /* FM NA 2.0 settings */
- static const struct max2175_reg_map fmna2p0_map[] = {
- { 0x01, 0x13 }, { 0x02, 0x08 }, { 0x03, 0x8d }, { 0x04, 0xc0 },
- { 0x05, 0x35 }, { 0x06, 0x18 }, { 0x07, 0x7c }, { 0x08, 0x54 },
- { 0x09, 0xa7 }, { 0x0a, 0x55 }, { 0x0b, 0x42 }, { 0x0c, 0x48 },
- { 0x0e, 0x7a }, { 0x0f, 0x88 }, { 0x10, 0x91 }, { 0x11, 0x61 },
- { 0x12, 0x61 }, { 0x13, 0x61 }, { 0x14, 0x61 }, { 0x15, 0x5c },
- { 0x16, 0x0f }, { 0x17, 0x34 }, { 0x18, 0x1c }, { 0x1a, 0x88 },
- { 0x1b, 0x33 }, { 0x1c, 0x02 }, { 0x1d, 0x00 }, { 0x1e, 0x01 },
- { 0x23, 0x80 }, { 0x24, 0x00 }, { 0x25, 0x95 }, { 0x26, 0x05 },
- { 0x27, 0x2c }, { 0x32, 0x08 }, { 0x33, 0xa8 }, { 0x36, 0xaf },
- { 0x37, 0x7e }, { 0x55, 0xbf }, { 0x56, 0x3f }, { 0x57, 0xff },
- { 0x58, 0x9f }, { 0x76, 0xac }, { 0x77, 0xc0 }, { 0x78, 0x00 },
- { 0x79, 0x00 }, { 0x82, 0x6b }, { 0x83, 0x00 }, { 0x85, 0x11 },
- { 0x86, 0x3f },
- };
- static const u16 ch_coeff_dab1[] = {
- 0x001c, 0x0007, 0xffcd, 0x0056, 0xffa4, 0x0033, 0x0027, 0xff61,
- 0x010e, 0xfec0, 0x0106, 0xffb8, 0xff1c, 0x023c, 0xfcb2, 0x039b,
- 0xfd4e, 0x0055, 0x036a, 0xf7de, 0x0d21, 0xee72, 0x1499, 0x6a51,
- };
- static const u16 ch_coeff_fmeu[] = {
- 0x0000, 0xffff, 0x0001, 0x0002, 0xfffa, 0xffff, 0x0015, 0xffec,
- 0xffde, 0x0054, 0xfff9, 0xff52, 0x00b8, 0x00a2, 0xfe0a, 0x00af,
- 0x02e3, 0xfc14, 0xfe89, 0x089d, 0xfa2e, 0xf30f, 0x25be, 0x4eb6,
- };
- static const u16 eq_coeff_fmeu1_ra02_m6db[] = {
- 0x0040, 0xffc6, 0xfffa, 0x002c, 0x000d, 0xff90, 0x0037, 0x006e,
- 0xffc0, 0xff5b, 0x006a, 0x00f0, 0xff57, 0xfe94, 0x0112, 0x0252,
- 0xfe0c, 0xfc6a, 0x0385, 0x0553, 0xfa49, 0xf789, 0x0b91, 0x1a10,
- };
- static const u16 ch_coeff_fmna[] = {
- 0x0001, 0x0003, 0xfffe, 0xfff4, 0x0000, 0x001f, 0x000c, 0xffbc,
- 0xffd3, 0x007d, 0x0075, 0xff33, 0xff01, 0x0131, 0x01ef, 0xfe60,
- 0xfc7a, 0x020e, 0x0656, 0xfd94, 0xf395, 0x02ab, 0x2857, 0x3d3f,
- };
- static const u16 eq_coeff_fmna1_ra02_m6db[] = {
- 0xfff1, 0xffe1, 0xffef, 0x000e, 0x0030, 0x002f, 0xfff6, 0xffa7,
- 0xff9d, 0x000a, 0x00a2, 0x00b5, 0xffea, 0xfed9, 0xfec5, 0x003d,
- 0x0217, 0x021b, 0xff5a, 0xfc2b, 0xfcbd, 0x02c4, 0x0ac3, 0x0e85,
- };
- static const u8 adc_presets[2][23] = {
- {
- 0x83, 0x00, 0xcf, 0xb4, 0x0f, 0x2c, 0x0c, 0x49,
- 0x00, 0x00, 0x00, 0x8c, 0x02, 0x02, 0x00, 0x04,
- 0xec, 0x82, 0x4b, 0xcc, 0x01, 0x88, 0x0c,
- },
- {
- 0x83, 0x00, 0xcf, 0xb4, 0x0f, 0x2c, 0x0c, 0x49,
- 0x00, 0x00, 0x00, 0x8c, 0x02, 0x20, 0x33, 0x8c,
- 0x57, 0xd7, 0x59, 0xb7, 0x65, 0x0e, 0x0c,
- },
- };
- /* 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(0x30, 0x35),
- regmap_reg_range(0x3a, 0x45),
- regmap_reg_range(0x59, 0x5e),
- regmap_reg_range(0x73, 0x75),
- };
- 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[] = {
- { 0x00, 0x07},
- };
- static const struct regmap_config max2175_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = 0xff,
- .reg_defaults = max2175_reg_defaults,
- .num_reg_defaults = ARRAY_SIZE(max2175_reg_defaults),
- .volatile_table = &max2175_volatile_regs,
- .cache_type = REGCACHE_FLAT,
- };
- 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 = div_u64((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) & 0xf);
- 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 = 2LL * (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 += 0x200000;
- /* 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) & 0x1f);
- 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, 0xff);
- max2175_write(ctx, 205, 0xff);
- max2175_write(ctx, 147, 0x20);
- max2175_write(ctx, 147, 0x00);
- max2175_write(ctx, 202, 0x20);
- max2175_write(ctx, 202, 0x00);
- 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 & 0x0f;
- max2175_write_bits(ctx, 81, 3, 0, data >> 4);
- data = max2175_read_rom(ctx, 1);
- ctx->rom_bbf_bw_fm = data & 0x0f;
- ctx->rom_bbf_bw_dab = data >> 4;
- data = max2175_read_rom(ctx, 2);
- max2175_write_bits(ctx, 82, 4, 0, data & 0x1f);
- max2175_write_bits(ctx, 82, 7, 5, data >> 5);
- data = max2175_read_rom(ctx, 3);
- if (ctx->am_hiz) {
- data &= 0x0f;
- data |= (max2175_read_rom(ctx, 7) & 0x40) >> 2;
- if (!data)
- data |= 2;
- } else {
- data = (data & 0xf0) >> 4;
- data |= (max2175_read_rom(ctx, 7) & 0x80) >> 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);
- int ret = 0;
- if (vf->tuner != 0)
- return -EINVAL;
- /* RF freq */
- vf->type = V4L2_TUNER_RF;
- vf->frequency = ctx->freq;
- return ret;
- }
- 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;
- strlcpy(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/media/v4l-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/media/v4l-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/media/v4l-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,
- const struct i2c_device_id *id)
- {
- 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 int 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);
- return 0;
- }
- static const struct i2c_device_id max2175_id[] = {
- { DRIVER_NAME, 0},
- {},
- };
- 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>");
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