Re: [PATCH v4] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver

From: Katsuhiro Suzuki
Date: Mon Jul 23 2018 - 04:51:24 EST

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Hello Mauro,

I found big mistake in this patch...

This driver is written and tested for Socionext MN88443x. It works fine.
But not tested for Socionext SC1501A series, since I don't have EVB for it.

I misunderstood spec of SC1501A. SC1501A has not compatibility with MN88443x.
So I will remove support of SC1501A from this driver and send v5 patch.

Regards,
--
Katsuhiro Suzuki

> -----Original Message-----
> From: Katsuhiro Suzuki <suzuki.katsuhiro@xxxxxxxxxxxxx>
> Sent: Wednesday, July 18, 2018 10:06 AM
> To: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>;
> linux-media@xxxxxxxxxxxxxxx
> Cc: Masami Hiramatsu <masami.hiramatsu@xxxxxxxxxx>; Jassi Brar
> <jaswinder.singh@xxxxxxxxxx>; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx; Suzuki, Katsuhiro/鈴木勝博
> <suzuki.katsuhiro@xxxxxxxxxxxxx>
> Subject: [PATCH v4] media: dvb-frontends: add Socionext SC1501A ISDB-S/T
> demodulator driver
>
> This patch adds a frontend driver for the Socionext SC1501A series
> and Socionext MN88443x ISDB-S/T demodulators.
>
> The maximum and minimum frequency of Socionext SC1501A comes from
> ISDB-S and ISDB-T so frequency range is the following:
> - ISDB-S (BS/CS110 IF frequency, Local freq 10.678GHz)
> - Min: BS-1: 1032MHz
> - Max: ND24: 2070MHz
> - ISDB-T
> - Min: ch13: 470MHz
> - Max: ch62: 770MHz
>
> Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@xxxxxxxxxxxxx>
>
> ---
>
> Changes since v3:
> - Add symbol rate for ISDB-S
> - Describe max/min frequency in Hz (not kHz)
> - Depends on Mauro's DVB core fixes
> https://patchwork.linuxtv.org/patch/50886/
> https://patchwork.linuxtv.org/patch/50887/
> https://patchwork.linuxtv.org/patch/50888/
>
> Changes since v2:
> - Fix frequency max and min
>
> Changes since v1:
> - Fix sparse warning about type of constant
> - Use div_s64() instead of divide operator
> ---
> drivers/media/dvb-frontends/Kconfig | 10 +
> drivers/media/dvb-frontends/Makefile | 1 +
> drivers/media/dvb-frontends/sc1501a.c | 804 ++++++++++++++++++++++++++
> drivers/media/dvb-frontends/sc1501a.h | 27 +
> 4 files changed, 842 insertions(+)
> create mode 100644 drivers/media/dvb-frontends/sc1501a.c
> create mode 100644 drivers/media/dvb-frontends/sc1501a.h
>
> diff --git a/drivers/media/dvb-frontends/Kconfig
> b/drivers/media/dvb-frontends/Kconfig
> index 9ecaa9d0744a..097ae3c834f2 100644
> --- a/drivers/media/dvb-frontends/Kconfig
> +++ b/drivers/media/dvb-frontends/Kconfig
> @@ -739,6 +739,16 @@ config DVB_TC90522
> Toshiba TC90522 2xISDB-S 8PSK + 2xISDB-T OFDM demodulator.
> Say Y when you want to support this frontend.
>
> +config DVB_SC1501A
> + tristate "Socionext SC1501A"
> + depends on DVB_CORE && I2C
> + select REGMAP_I2C
> + default m if !MEDIA_SUBDRV_AUTOSELECT
> + help
> + A driver for Socionext SC1501A and Panasonic MN88443x
> + ISDB-S + ISDB-T demodulator.
> + Say Y when you want to support this frontend.
> +
> comment "Digital terrestrial only tuners/PLL"
> depends on DVB_CORE
>
> diff --git a/drivers/media/dvb-frontends/Makefile
> b/drivers/media/dvb-frontends/Makefile
> index 67a783fd5ed0..e204502347ed 100644
> --- a/drivers/media/dvb-frontends/Makefile
> +++ b/drivers/media/dvb-frontends/Makefile
> @@ -125,6 +125,7 @@ obj-$(CONFIG_DVB_AF9033) += af9033.o
> obj-$(CONFIG_DVB_AS102_FE) += as102_fe.o
> obj-$(CONFIG_DVB_GP8PSK_FE) += gp8psk-fe.o
> obj-$(CONFIG_DVB_TC90522) += tc90522.o
> +obj-$(CONFIG_DVB_SC1501A) += sc1501a.o
> obj-$(CONFIG_DVB_HORUS3A) += horus3a.o
> obj-$(CONFIG_DVB_ASCOT2E) += ascot2e.o
> obj-$(CONFIG_DVB_HELENE) += helene.o
> diff --git a/drivers/media/dvb-frontends/sc1501a.c
> b/drivers/media/dvb-frontends/sc1501a.c
> new file mode 100644
> index 000000000000..4c29c0267921
> --- /dev/null
> +++ b/drivers/media/dvb-frontends/sc1501a.c
> @@ -0,0 +1,804 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Socionext SC1501A series demodulator driver for ISDB-S/ISDB-T.
> +//
> +// Copyright (c) 2018 Socionext Inc.
> +
> +#include <linux/bitfield.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <media/dvb_math.h>
> +
> +#include "sc1501a.h"
> +
> +/* ISDB-S registers */
> +#define ATSIDU_S 0x2f
> +#define ATSIDL_S 0x30
> +#define TSSET_S 0x31
> +#define AGCREAD_S 0x5a
> +#define CPMON1_S 0x5e
> +#define CPMON1_S_FSYNC BIT(5)
> +#define CPMON1_S_ERRMON BIT(4)
> +#define CPMON1_S_SIGOFF BIT(3)
> +#define CPMON1_S_W2LOCK BIT(2)
> +#define CPMON1_S_W1LOCK BIT(1)
> +#define CPMON1_S_DW1LOCK BIT(0)
> +#define TRMON_S 0x60
> +#define BERCNFLG_S 0x68
> +#define BERCNFLG_S_BERVRDY BIT(5)
> +#define BERCNFLG_S_BERVCHK BIT(4)
> +#define BERCNFLG_S_BERDRDY BIT(3)
> +#define BERCNFLG_S_BERDCHK BIT(2)
> +#define CNRDXU_S 0x69
> +#define CNRDXL_S 0x6a
> +#define CNRDYU_S 0x6b
> +#define CNRDYL_S 0x6c
> +#define BERVRDU_S 0x71
> +#define BERVRDL_S 0x72
> +#define DOSET1_S 0x73
> +
> +/* Primary ISDB-T */
> +#define PLLASET1 0x00
> +#define PLLASET2 0x01
> +#define PLLBSET1 0x02
> +#define PLLBSET2 0x03
> +#define PLLSET 0x04
> +#define OUTCSET 0x08
> +#define OUTCSET_CHDRV_8MA 0xff
> +#define OUTCSET_CHDRV_4MA 0x00
> +#define PLDWSET 0x09
> +#define PLDWSET_NORMAL 0x00
> +#define PLDWSET_PULLDOWN 0xff
> +#define HIZSET1 0x0a
> +#define HIZSET2 0x0b
> +
> +/* Secondary ISDB-T (for MN884434 only) */
> +#define RCVSET 0x00
> +#define TSSET1_M 0x01
> +#define TSSET2_M 0x02
> +#define TSSET3_M 0x03
> +#define INTACSET 0x08
> +#define HIZSET3 0x0b
> +
> +/* ISDB-T registers */
> +#define TSSET1 0x05
> +#define TSSET1_TSASEL_MASK GENMASK(4, 3)
> +#define TSSET1_TSASEL_ISDBT (0x0 << 3)
> +#define TSSET1_TSASEL_ISDBS (0x1 << 3)
> +#define TSSET1_TSASEL_NONE (0x2 << 3)
> +#define TSSET1_TSBSEL_MASK GENMASK(2, 1)
> +#define TSSET1_TSBSEL_ISDBS (0x0 << 1)
> +#define TSSET1_TSBSEL_ISDBT (0x1 << 1)
> +#define TSSET1_TSBSEL_NONE (0x2 << 1)
> +#define TSSET2 0x06
> +#define TSSET3 0x07
> +#define TSSET3_INTASEL_MASK GENMASK(7, 6)
> +#define TSSET3_INTASEL_T (0x0 << 6)
> +#define TSSET3_INTASEL_S (0x1 << 6)
> +#define TSSET3_INTASEL_NONE (0x2 << 6)
> +#define TSSET3_INTBSEL_MASK GENMASK(5, 4)
> +#define TSSET3_INTBSEL_S (0x0 << 4)
> +#define TSSET3_INTBSEL_T (0x1 << 4)
> +#define TSSET3_INTBSEL_NONE (0x2 << 4)
> +#define OUTSET2 0x0d
> +#define PWDSET 0x0f
> +#define PWDSET_OFDMPD_MASK GENMASK(3, 2)
> +#define PWDSET_OFDMPD_DOWN BIT(3)
> +#define PWDSET_PSKPD_MASK GENMASK(1, 0)
> +#define PWDSET_PSKPD_DOWN BIT(1)
> +#define CLKSET1_T 0x11
> +#define MDSET_T 0x13
> +#define MDSET_T_MDAUTO_MASK GENMASK(7, 4)
> +#define MDSET_T_MDAUTO_AUTO (0xf << 4)
> +#define MDSET_T_MDAUTO_MANUAL (0x0 << 4)
> +#define MDSET_T_FFTS_MASK GENMASK(3, 2)
> +#define MDSET_T_FFTS_MODE1 (0x0 << 2)
> +#define MDSET_T_FFTS_MODE2 (0x1 << 2)
> +#define MDSET_T_FFTS_MODE3 (0x2 << 2)
> +#define MDSET_T_GI_MASK GENMASK(1, 0)
> +#define MDSET_T_GI_1_32 (0x0 << 0)
> +#define MDSET_T_GI_1_16 (0x1 << 0)
> +#define MDSET_T_GI_1_8 (0x2 << 0)
> +#define MDSET_T_GI_1_4 (0x3 << 0)
> +#define MDASET_T 0x14
> +#define ADCSET1_T 0x20
> +#define ADCSET1_T_REFSEL_MASK GENMASK(1, 0)
> +#define ADCSET1_T_REFSEL_2V (0x3 << 0)
> +#define ADCSET1_T_REFSEL_1_5V (0x2 << 0)
> +#define ADCSET1_T_REFSEL_1V (0x1 << 0)
> +#define NCOFREQU_T 0x24
> +#define NCOFREQM_T 0x25
> +#define NCOFREQL_T 0x26
> +#define FADU_T 0x27
> +#define FADM_T 0x28
> +#define FADL_T 0x29
> +#define AGCSET2_T 0x2c
> +#define AGCSET2_T_IFPOLINV_INC BIT(0)
> +#define AGCSET2_T_RFPOLINV_INC BIT(1)
> +#define AGCV3_T 0x3e
> +#define MDRD_T 0xa2
> +#define MDRD_T_SEGID_MASK GENMASK(5, 4)
> +#define MDRD_T_SEGID_13 (0x0 << 4)
> +#define MDRD_T_SEGID_1 (0x1 << 4)
> +#define MDRD_T_SEGID_3 (0x2 << 4)
> +#define MDRD_T_FFTS_MASK GENMASK(3, 2)
> +#define MDRD_T_FFTS_MODE1 (0x0 << 2)
> +#define MDRD_T_FFTS_MODE2 (0x1 << 2)
> +#define MDRD_T_FFTS_MODE3 (0x2 << 2)
> +#define MDRD_T_GI_MASK GENMASK(1, 0)
> +#define MDRD_T_GI_1_32 (0x0 << 0)
> +#define MDRD_T_GI_1_16 (0x1 << 0)
> +#define MDRD_T_GI_1_8 (0x2 << 0)
> +#define MDRD_T_GI_1_4 (0x3 << 0)
> +#define SSEQRD_T 0xa3
> +#define SSEQRD_T_SSEQSTRD_MASK GENMASK(3, 0)
> +#define SSEQRD_T_SSEQSTRD_RESET (0x0 << 0)
> +#define SSEQRD_T_SSEQSTRD_TUNING (0x1 << 0)
> +#define SSEQRD_T_SSEQSTRD_AGC (0x2 << 0)
> +#define SSEQRD_T_SSEQSTRD_SEARCH (0x3 << 0)
> +#define SSEQRD_T_SSEQSTRD_CLOCK_SYNC (0x4 << 0)
> +#define SSEQRD_T_SSEQSTRD_FREQ_SYNC (0x8 << 0)
> +#define SSEQRD_T_SSEQSTRD_FRAME_SYNC (0x9 << 0)
> +#define SSEQRD_T_SSEQSTRD_SYNC (0xa << 0)
> +#define SSEQRD_T_SSEQSTRD_LOCK (0xb << 0)
> +#define AGCRDU_T 0xa8
> +#define AGCRDL_T 0xa9
> +#define CNRDU_T 0xbe
> +#define CNRDL_T 0xbf
> +#define BERFLG_T 0xc0
> +#define BERFLG_T_BERDRDY BIT(7)
> +#define BERFLG_T_BERDCHK BIT(6)
> +#define BERFLG_T_BERVRDYA BIT(5)
> +#define BERFLG_T_BERVCHKA BIT(4)
> +#define BERFLG_T_BERVRDYB BIT(3)
> +#define BERFLG_T_BERVCHKB BIT(2)
> +#define BERFLG_T_BERVRDYC BIT(1)
> +#define BERFLG_T_BERVCHKC BIT(0)
> +#define BERRDU_T 0xc1
> +#define BERRDM_T 0xc2
> +#define BERRDL_T 0xc3
> +#define BERLENRDU_T 0xc4
> +#define BERLENRDL_T 0xc5
> +#define ERRFLG_T 0xc6
> +#define ERRFLG_T_BERDOVF BIT(7)
> +#define ERRFLG_T_BERVOVFA BIT(6)
> +#define ERRFLG_T_BERVOVFB BIT(5)
> +#define ERRFLG_T_BERVOVFC BIT(4)
> +#define ERRFLG_T_NERRFA BIT(3)
> +#define ERRFLG_T_NERRFB BIT(2)
> +#define ERRFLG_T_NERRFC BIT(1)
> +#define ERRFLG_T_NERRF BIT(0)
> +#define DOSET1_T 0xcf
> +
> +#define CLK_LOW 4000000
> +#define CLK_DIRECT 20200000
> +#define CLK_MAX 25410000
> +
> +#define S_T_FREQ 8126984 /* 512 / 63 MHz */
> +
> +struct sc1501a_spec {
> + bool primary;
> +};
> +
> +struct sc1501a_priv {
> + const struct sc1501a_spec *spec;
> +
> + struct dvb_frontend fe;
> + struct clk *mclk;
> + struct gpio_desc *reset_gpio;
> + u32 clk_freq;
> + u32 if_freq;
> +
> + /* Common */
> + bool use_clkbuf;
> +
> + /* ISDB-S */
> + struct i2c_client *client_s;
> + struct regmap *regmap_s;
> +
> + /* ISDB-T */
> + struct i2c_client *client_t;
> + struct regmap *regmap_t;
> +};
> +
> +static void sc1501a_cmn_power_on(struct sc1501a_priv *chip)
> +{
> + struct regmap *r_t = chip->regmap_t;
> +
> + clk_prepare_enable(chip->mclk);
> +
> + gpiod_set_value_cansleep(chip->reset_gpio, 1);
> + usleep_range(100, 1000);
> + gpiod_set_value_cansleep(chip->reset_gpio, 0);
> +
> + if (chip->spec->primary) {
> + regmap_write(r_t, OUTCSET, OUTCSET_CHDRV_8MA);
> + regmap_write(r_t, PLDWSET, PLDWSET_NORMAL);
> + regmap_write(r_t, HIZSET1, 0x80);
> + regmap_write(r_t, HIZSET2, 0xe0);
> + } else {
> + regmap_write(r_t, HIZSET3, 0x8f);
> + }
> +}
> +
> +static void sc1501a_cmn_power_off(struct sc1501a_priv *chip)
> +{
> + gpiod_set_value_cansleep(chip->reset_gpio, 1);
> +
> + clk_disable_unprepare(chip->mclk);
> +}
> +
> +static void sc1501a_s_sleep(struct sc1501a_priv *chip)
> +{
> + struct regmap *r_t = chip->regmap_t;
> +
> + regmap_update_bits(r_t, PWDSET, PWDSET_PSKPD_MASK,
> + PWDSET_PSKPD_DOWN);
> +}
> +
> +static void sc1501a_s_wake(struct sc1501a_priv *chip)
> +{
> + struct regmap *r_t = chip->regmap_t;
> +
> + regmap_update_bits(r_t, PWDSET, PWDSET_PSKPD_MASK, 0);
> +}
> +
> +static void sc1501a_s_tune(struct sc1501a_priv *chip,
> + struct dtv_frontend_properties *c)
> +{
> + struct regmap *r_s = chip->regmap_s;
> +
> + regmap_write(r_s, ATSIDU_S, c->stream_id >> 8);
> + regmap_write(r_s, ATSIDL_S, c->stream_id);
> + regmap_write(r_s, TSSET_S, 0);
> +}
> +
> +static int sc1501a_s_read_status(struct sc1501a_priv *chip,
> + struct dtv_frontend_properties *c,
> + enum fe_status *status)
> +{
> + struct regmap *r_s = chip->regmap_s;
> + u32 cpmon, tmpu, tmpl, flg;
> + u64 tmp;
> +
> + /* Sync detection */
> + regmap_read(r_s, CPMON1_S, &cpmon);
> +
> + *status = 0;
> + if (cpmon & CPMON1_S_FSYNC)
> + *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
> + if (cpmon & CPMON1_S_W2LOCK)
> + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
> +
> + /* Signal strength */
> + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + if (*status & FE_HAS_SIGNAL) {
> + u32 agc;
> +
> + regmap_read(r_s, AGCREAD_S, &tmpu);
> + agc = tmpu << 8;
> +
> + c->strength.len = 1;
> + c->strength.stat[0].scale = FE_SCALE_RELATIVE;
> + c->strength.stat[0].uvalue = agc;
> + }
> +
> + /* C/N rate */
> + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + if (*status & FE_HAS_VITERBI) {
> + u32 cnr = 0, x, y, d;
> + u64 d_3 = 0;
> +
> + regmap_read(r_s, CNRDXU_S, &tmpu);
> + regmap_read(r_s, CNRDXL_S, &tmpl);
> + x = (tmpu << 8) | tmpl;
> + regmap_read(r_s, CNRDYU_S, &tmpu);
> + regmap_read(r_s, CNRDYL_S, &tmpl);
> + y = (tmpu << 8) | tmpl;
> +
> + /* CNR[dB]: 10 * log10(D) - 30.74 / D^3 - 3 */
> + /* D = x^2 / (2^15 * y - x^2) */
> + d = (y << 15) - x * x;
> + if (d > 0) {
> + /* (2^4 * D)^3 = 2^12 * D^3 */
> + /* 3.074 * 2^(12 + 24) = 211243671486 */
> + d_3 = div_u64(16 * x * x, d);
> + d_3 = d_3 * d_3 * d_3;
> + if (d_3)
> + d_3 = div_u64(211243671486ULL, d_3);
> + }
> +
> + if (d_3) {
> + /* 0.3 * 2^24 = 5033164 */
> + tmp = (s64)2 * intlog10(x) - intlog10(abs(d)) - d_3
> + - 5033164;
> + cnr = div_u64(tmp * 10000, 1 << 24);
> + }
> +
> + if (cnr) {
> + c->cnr.len = 1;
> + c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
> + c->cnr.stat[0].uvalue = cnr;
> + }
> + }
> +
> + /* BER */
> + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + regmap_read(r_s, BERCNFLG_S, &flg);
> +
> + if ((*status & FE_HAS_VITERBI) && (flg & BERCNFLG_S_BERVRDY)) {
> + u32 bit_err, bit_cnt;
> +
> + regmap_read(r_s, BERVRDU_S, &tmpu);
> + regmap_read(r_s, BERVRDL_S, &tmpl);
> + bit_err = (tmpu << 8) | tmpl;
> + bit_cnt = (1 << 13) * 204;
> +
> + if (bit_cnt) {
> + c->post_bit_error.len = 1;
> + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
> + c->post_bit_error.stat[0].uvalue = bit_err;
> + c->post_bit_count.len = 1;
> + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
> + c->post_bit_count.stat[0].uvalue = bit_cnt;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static void sc1501a_t_sleep(struct sc1501a_priv *chip)
> +{
> + struct regmap *r_t = chip->regmap_t;
> +
> + regmap_update_bits(r_t, PWDSET, PWDSET_OFDMPD_MASK,
> + PWDSET_OFDMPD_DOWN);
> +}
> +
> +static void sc1501a_t_wake(struct sc1501a_priv *chip)
> +{
> + struct regmap *r_t = chip->regmap_t;
> +
> + regmap_update_bits(r_t, PWDSET, PWDSET_OFDMPD_MASK, 0);
> +}
> +
> +static bool sc1501a_t_is_valid_clk(u32 adckt, u32 if_freq)
> +{
> + if (if_freq == DIRECT_IF_57MHZ) {
> + if (adckt >= CLK_DIRECT && adckt <= 21000000)
> + return true;
> + if (adckt >= 25300000 && adckt <= CLK_MAX)
> + return true;
> + } else if (if_freq == DIRECT_IF_44MHZ) {
> + if (adckt >= 25000000 && adckt <= CLK_MAX)
> + return true;
> + } else if (if_freq >= LOW_IF_4MHZ && if_freq < DIRECT_IF_44MHZ) {
> + if (adckt >= CLK_DIRECT && adckt <= CLK_MAX)
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static int sc1501a_t_set_freq(struct sc1501a_priv *chip)
> +{
> + struct device *dev = &chip->client_s->dev;
> + struct regmap *r_t = chip->regmap_t;
> + s64 adckt, nco, ad_t;
> + u32 m, v;
> +
> + /* Clock buffer (but not supported) or XTAL */
> + if (chip->clk_freq >= CLK_LOW && chip->clk_freq < CLK_DIRECT) {
> + chip->use_clkbuf = true;
> + regmap_write(r_t, CLKSET1_T, 0x07);
> +
> + adckt = 0;
> + } else {
> + chip->use_clkbuf = false;
> + regmap_write(r_t, CLKSET1_T, 0x00);
> +
> + adckt = chip->clk_freq;
> + }
> + if (!sc1501a_t_is_valid_clk(adckt, chip->if_freq)) {
> + dev_err(dev, "Invalid clock, CLK:%d, ADCKT:%lld, IF:%d\n",
> + chip->clk_freq, adckt, chip->if_freq);
> + return -EINVAL;
> + }
> +
> + /* Direct IF or Low IF */
> + if (chip->if_freq == DIRECT_IF_57MHZ ||
> + chip->if_freq == DIRECT_IF_44MHZ)
> + nco = adckt * 2 - chip->if_freq;
> + else
> + nco = -((s64)chip->if_freq);
> + nco = div_s64(nco << 24, adckt);
> + ad_t = div_s64(adckt << 22, S_T_FREQ);
> +
> + regmap_write(r_t, NCOFREQU_T, nco >> 16);
> + regmap_write(r_t, NCOFREQM_T, nco >> 8);
> + regmap_write(r_t, NCOFREQL_T, nco);
> + regmap_write(r_t, FADU_T, ad_t >> 16);
> + regmap_write(r_t, FADM_T, ad_t >> 8);
> + regmap_write(r_t, FADL_T, ad_t);
> +
> + /* Level of IF */
> + m = ADCSET1_T_REFSEL_MASK;
> + v = ADCSET1_T_REFSEL_1_5V;
> + regmap_update_bits(r_t, ADCSET1_T, m, v);
> +
> + /* Polarity of AGC */
> + v = AGCSET2_T_IFPOLINV_INC | AGCSET2_T_RFPOLINV_INC;
> + regmap_update_bits(r_t, AGCSET2_T, v, v);
> +
> + /* Lower output level of AGC */
> + regmap_write(r_t, AGCV3_T, 0x00);
> +
> + regmap_write(r_t, MDSET_T, 0xfa);
> +
> + return 0;
> +}
> +
> +static void sc1501a_t_tune(struct sc1501a_priv *chip,
> + struct dtv_frontend_properties *c)
> +{
> + struct regmap *r_t = chip->regmap_t;
> + u32 m, v;
> +
> + m = MDSET_T_MDAUTO_MASK | MDSET_T_FFTS_MASK | MDSET_T_GI_MASK;
> + v = MDSET_T_MDAUTO_AUTO | MDSET_T_FFTS_MODE3 | MDSET_T_GI_1_8;
> + regmap_update_bits(r_t, MDSET_T, m, v);
> +
> + regmap_write(r_t, MDASET_T, 0);
> +}
> +
> +static int sc1501a_t_read_status(struct sc1501a_priv *chip,
> + struct dtv_frontend_properties *c,
> + enum fe_status *status)
> +{
> + struct regmap *r_t = chip->regmap_t;
> + u32 seqrd, st, flg, tmpu, tmpm, tmpl;
> + u64 tmp;
> +
> + /* Sync detection */
> + regmap_read(r_t, SSEQRD_T, &seqrd);
> + st = seqrd & SSEQRD_T_SSEQSTRD_MASK;
> +
> + *status = 0;
> + if (st >= SSEQRD_T_SSEQSTRD_SYNC)
> + *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
> + if (st >= SSEQRD_T_SSEQSTRD_FRAME_SYNC)
> + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
> +
> + /* Signal strength */
> + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + if (*status & FE_HAS_SIGNAL) {
> + u32 agc;
> +
> + regmap_read(r_t, AGCRDU_T, &tmpu);
> + regmap_read(r_t, AGCRDL_T, &tmpl);
> + agc = (tmpu << 8) | tmpl;
> +
> + c->strength.len = 1;
> + c->strength.stat[0].scale = FE_SCALE_RELATIVE;
> + c->strength.stat[0].uvalue = agc;
> + }
> +
> + /* C/N rate */
> + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + if (*status & FE_HAS_VITERBI) {
> + u32 cnr;
> +
> + regmap_read(r_t, CNRDU_T, &tmpu);
> + regmap_read(r_t, CNRDL_T, &tmpl);
> +
> + if (tmpu || tmpl) {
> + /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
> + /* intlog10(65536) = 80807124, 0.2 * 2^24 = 3355443 */
> + tmp = (u64)80807124 - intlog10((tmpu << 8) | tmpl)
> + + 3355443;
> + cnr = div_u64(tmp * 10000, 1 << 24);
> + } else {
> + cnr = 0;
> + }
> +
> + c->cnr.len = 1;
> + c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
> + c->cnr.stat[0].uvalue = cnr;
> + }
> +
> + /* BER */
> + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
> +
> + regmap_read(r_t, BERFLG_T, &flg);
> +
> + if ((*status & FE_HAS_VITERBI) && (flg & BERFLG_T_BERVRDYA)) {
> + u32 bit_err, bit_cnt;
> +
> + regmap_read(r_t, BERRDU_T, &tmpu);
> + regmap_read(r_t, BERRDM_T, &tmpm);
> + regmap_read(r_t, BERRDL_T, &tmpl);
> + bit_err = (tmpu << 16) | (tmpm << 8) | tmpl;
> +
> + regmap_read(r_t, BERLENRDU_T, &tmpu);
> + regmap_read(r_t, BERLENRDL_T, &tmpl);
> + bit_cnt = ((tmpu << 8) | tmpl) * 203 * 8;
> +
> + if (bit_cnt) {
> + c->post_bit_error.len = 1;
> + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
> + c->post_bit_error.stat[0].uvalue = bit_err;
> + c->post_bit_count.len = 1;
> + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
> + c->post_bit_count.stat[0].uvalue = bit_cnt;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int sc1501a_sleep(struct dvb_frontend *fe)
> +{
> + struct sc1501a_priv *chip = fe->demodulator_priv;
> +
> + sc1501a_s_sleep(chip);
> + sc1501a_t_sleep(chip);
> +
> + return 0;
> +}
> +
> +static int sc1501a_set_frontend(struct dvb_frontend *fe)
> +{
> + struct sc1501a_priv *chip = fe->demodulator_priv;
> + struct dtv_frontend_properties *c = &fe->dtv_property_cache;
> + struct regmap *r_s = chip->regmap_s;
> + struct regmap *r_t = chip->regmap_t;
> + u8 tssel = 0, intsel = 0;
> +
> + if (c->delivery_system == SYS_ISDBS) {
> + sc1501a_s_wake(chip);
> + sc1501a_t_sleep(chip);
> +
> + tssel = TSSET1_TSASEL_ISDBS;
> + intsel = TSSET3_INTASEL_S;
> + } else if (c->delivery_system == SYS_ISDBT) {
> + sc1501a_s_sleep(chip);
> + sc1501a_t_wake(chip);
> +
> + sc1501a_t_set_freq(chip);
> +
> + tssel = TSSET1_TSASEL_ISDBT;
> + intsel = TSSET3_INTASEL_T;
> + }
> +
> + regmap_update_bits(r_t, TSSET1,
> + TSSET1_TSASEL_MASK | TSSET1_TSBSEL_MASK,
> + tssel | TSSET1_TSBSEL_NONE);
> + regmap_write(r_t, TSSET2, 0);
> + regmap_update_bits(r_t, TSSET3,
> + TSSET3_INTASEL_MASK | TSSET3_INTBSEL_MASK,
> + intsel | TSSET3_INTBSEL_NONE);
> +
> + regmap_write(r_t, DOSET1_T, 0x95);
> + regmap_write(r_s, DOSET1_S, 0x80);
> +
> + if (c->delivery_system == SYS_ISDBS)
> + sc1501a_s_tune(chip, c);
> + else if (c->delivery_system == SYS_ISDBT)
> + sc1501a_t_tune(chip, c);
> +
> + if (fe->ops.tuner_ops.set_params) {
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 1);
> + fe->ops.tuner_ops.set_params(fe);
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 0);
> + }
> +
> + return 0;
> +}
> +
> +static int sc1501a_get_tune_settings(struct dvb_frontend *fe,
> + struct dvb_frontend_tune_settings *s)
> +{
> + struct dtv_frontend_properties *c = &fe->dtv_property_cache;
> +
> + s->min_delay_ms = 850;
> +
> + if (c->delivery_system == SYS_ISDBS) {
> + s->max_drift = 30000 * 2 + 1;
> + s->step_size = 30000;
> + } else if (c->delivery_system == SYS_ISDBT) {
> + s->max_drift = 142857 * 2 + 1;
> + s->step_size = 142857 * 2;
> + }
> +
> + return 0;
> +}
> +
> +static int sc1501a_read_status(struct dvb_frontend *fe, enum fe_status
*status)
> +{
> + struct sc1501a_priv *chip = fe->demodulator_priv;
> + struct dtv_frontend_properties *c = &fe->dtv_property_cache;
> +
> + if (c->delivery_system == SYS_ISDBS)
> + return sc1501a_s_read_status(chip, c, status);
> +
> + if (c->delivery_system == SYS_ISDBT)
> + return sc1501a_t_read_status(chip, c, status);
> +
> + return -EINVAL;
> +}
> +
> +static const struct dvb_frontend_ops sc1501a_ops = {
> + .delsys = { SYS_ISDBS, SYS_ISDBT },
> + .info = {
> + .name = "Socionext SC1501A",
> + .frequency_min_hz = 470 * MHz,
> + .frequency_max_hz = 2071 * MHz,
> + .symbol_rate_min = 28860000,
> + .symbol_rate_max = 28860000,
> + .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
> + FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
> + FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
> + },
> +
> + .sleep = sc1501a_sleep,
> + .set_frontend = sc1501a_set_frontend,
> + .get_tune_settings = sc1501a_get_tune_settings,
> + .read_status = sc1501a_read_status,
> +};
> +
> +static const struct regmap_config regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .cache_type = REGCACHE_NONE,
> +};
> +
> +static int sc1501a_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct sc1501a_config *conf = client->dev.platform_data;
> + struct sc1501a_priv *chip;
> + struct device *dev = &client->dev;
> + int ret;
> +
> + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
> + if (!chip)
> + return -ENOMEM;
> +
> + if (dev->of_node)
> + chip->spec = of_device_get_match_data(dev);
> + else
> + chip->spec = (struct sc1501a_spec *)id->driver_data;
> + if (!chip->spec)
> + return -EINVAL;
> +
> + chip->mclk = devm_clk_get(dev, "mclk");
> + if (IS_ERR(chip->mclk) && !conf) {
> + dev_err(dev, "Failed to request mclk: %ld\n",
> + PTR_ERR(chip->mclk));
> + return PTR_ERR(chip->mclk);
> + }
> +
> + ret = of_property_read_u32(dev->of_node, "if-frequency",
> + &chip->if_freq);
> + if (ret && !conf) {
> + dev_err(dev, "Failed to load IF frequency: %d.\n", ret);
> + return ret;
> + }
> +
> + chip->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(chip->reset_gpio)) {
> + dev_err(dev, "Failed to request reset_gpio: %ld\n",
> + PTR_ERR(chip->reset_gpio));
> + return PTR_ERR(chip->reset_gpio);
> + }
> +
> + if (conf) {
> + chip->mclk = conf->mclk;
> + chip->if_freq = conf->if_freq;
> + chip->reset_gpio = conf->reset_gpio;
> +
> + *conf->fe = &chip->fe;
> + }
> +
> + chip->client_s = client;
> + chip->regmap_s = devm_regmap_init_i2c(chip->client_s, &regmap_config);
> + if (IS_ERR(chip->regmap_s))
> + return PTR_ERR(chip->regmap_s);
> +
> + /*
> + * Chip has two I2C addresses for each satellite/terrestrial system.
> + * ISDB-T uses address ISDB-S + 4, so we register a dummy client.
> + */
> + chip->client_t = i2c_new_dummy(client->adapter, client->addr + 4);
> + if (!chip->client_t)
> + return -ENODEV;
> +
> + chip->regmap_t = devm_regmap_init_i2c(chip->client_t, &regmap_config);
> + if (IS_ERR(chip->regmap_t)) {
> + ret = PTR_ERR(chip->regmap_t);
> + goto err_i2c_t;
> + }
> +
> + chip->clk_freq = clk_get_rate(chip->mclk);
> +
> + memcpy(&chip->fe.ops, &sc1501a_ops, sizeof(sc1501a_ops));
> + chip->fe.demodulator_priv = chip;
> + i2c_set_clientdata(client, chip);
> +
> + sc1501a_cmn_power_on(chip);
> + sc1501a_s_sleep(chip);
> + sc1501a_t_sleep(chip);
> +
> + return 0;
> +
> +err_i2c_t:
> + i2c_unregister_device(chip->client_t);
> +
> + return ret;
> +}
> +
> +static int sc1501a_remove(struct i2c_client *client)
> +{
> + struct sc1501a_priv *chip = i2c_get_clientdata(client);
> +
> + sc1501a_cmn_power_off(chip);
> +
> + i2c_unregister_device(chip->client_t);
> +
> + return 0;
> +}
> +
> +static const struct sc1501a_spec sc1501a_spec_pri = {
> + .primary = true,
> +};
> +
> +static const struct sc1501a_spec sc1501a_spec_sec = {
> + .primary = false,
> +};
> +
> +static const struct of_device_id sc1501a_of_match[] = {
> + { .compatible = "socionext,mn884433", .data = &sc1501a_spec_pri, },
> + { .compatible = "socionext,mn884434-0", .data = &sc1501a_spec_pri, },
> + { .compatible = "socionext,mn884434-1", .data = &sc1501a_spec_sec, },
> + { .compatible = "socionext,sc1501a", .data = &sc1501a_spec_pri, },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, sc1501a_of_match);
> +
> +static const struct i2c_device_id sc1501a_i2c_id[] = {
> + { "mn884433", (kernel_ulong_t)&sc1501a_spec_pri },
> + { "mn884434-0", (kernel_ulong_t)&sc1501a_spec_pri },
> + { "mn884434-1", (kernel_ulong_t)&sc1501a_spec_sec },
> + { "sc1501a", (kernel_ulong_t)&sc1501a_spec_pri },
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, sc1501a_i2c_id);
> +
> +static struct i2c_driver sc1501a_driver = {
> + .driver = {
> + .name = "sc1501a",
> + .of_match_table = of_match_ptr(sc1501a_of_match),
> + },
> + .probe = sc1501a_probe,
> + .remove = sc1501a_remove,
> + .id_table = sc1501a_i2c_id,
> +};
> +
> +module_i2c_driver(sc1501a_driver);
> +
> +MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@xxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Socionext SC1501A series demodulator driver.");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/media/dvb-frontends/sc1501a.h
> b/drivers/media/dvb-frontends/sc1501a.h
> new file mode 100644
> index 000000000000..7e247d44e4ac
> --- /dev/null
> +++ b/drivers/media/dvb-frontends/sc1501a.h
> @@ -0,0 +1,27 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Socionext SC1501A series demodulator driver for ISDB-S/ISDB-T.
> + *
> + * Copyright (c) 2018 Socionext Inc.
> + */
> +
> +#ifndef SC1501A_H
> +#define SC1501A_H
> +
> +#include <media/dvb_frontend.h>
> +
> +/* ISDB-T IF frequency */
> +#define DIRECT_IF_57MHZ 57000000
> +#define DIRECT_IF_44MHZ 44000000
> +#define LOW_IF_4MHZ 4000000
> +
> +struct sc1501a_config {
> + struct clk *mclk;
> + u32 if_freq;
> + struct gpio_desc *reset_gpio;
> +
> + /* Everything after that is returned by the driver. */
> + struct dvb_frontend **fe;
> +};
> +
> +#endif /* SC1501A_H */
> --
> 2.18.0

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