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* [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver
@ 2018-05-15  0:37 Katsuhiro Suzuki
  2018-05-15  4:23 ` kbuild test robot
  2018-05-15  7:49 ` kbuild test robot
  0 siblings, 2 replies; 3+ messages in thread
From: Katsuhiro Suzuki @ 2018-05-15  0:37 UTC (permalink / raw)
  To: Mauro Carvalho Chehab, linux-media
  Cc: Masami Hiramatsu, Jassi Brar, linux-arm-kernel, linux-kernel,
	Katsuhiro Suzuki

This patch adds a frontend driver for the Socionext SC1501A series
and Socionext MN88443x ISDB-S/T demodulators.

Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
---
 drivers/media/dvb-frontends/Kconfig   |  10 +
 drivers/media/dvb-frontends/Makefile  |   1 +
 drivers/media/dvb-frontends/sc1501a.c | 802 ++++++++++++++++++++++++++
 drivers/media/dvb-frontends/sc1501a.h |  27 +
 4 files changed, 840 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 55e36a4f5215..e9d2c94b290e 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, MN884433 and MN884434
+	  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..6460d7f95b35
--- /dev/null
+++ b/drivers/media/dvb-frontends/sc1501a.c
@@ -0,0 +1,802 @@
+// 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(211243671486, 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 = (nco << 24) / adckt;
+	ad_t = (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 SC1501",
+		.frequency_min = 90000000,
+		.frequency_max = 2100000000,
+		.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@socionext.com>");
+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 */
-- 
2.17.0

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver
  2018-05-15  0:37 [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver Katsuhiro Suzuki
@ 2018-05-15  4:23 ` kbuild test robot
  2018-05-15  7:49 ` kbuild test robot
  1 sibling, 0 replies; 3+ messages in thread
From: kbuild test robot @ 2018-05-15  4:23 UTC (permalink / raw)
  To: Katsuhiro Suzuki
  Cc: kbuild-all, Mauro Carvalho Chehab, linux-media, Masami Hiramatsu,
	Jassi Brar, linux-arm-kernel, linux-kernel, Katsuhiro Suzuki

Hi Katsuhiro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v4.17-rc5 next-20180514]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Katsuhiro-Suzuki/media-dvb-frontends-add-Socionext-SC1501A-ISDB-S-T-demodulator-driver/20180515-091453
base:   git://linuxtv.org/media_tree.git master
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/media/dvb-frontends/sc1501a.c:313:47: sparse: constant 211243671486 is so big it is long

vim +313 drivers/media/dvb-frontends/sc1501a.c

   258	
   259	static int sc1501a_s_read_status(struct sc1501a_priv *chip,
   260					 struct dtv_frontend_properties *c,
   261					 enum fe_status *status)
   262	{
   263		struct regmap *r_s = chip->regmap_s;
   264		u32 cpmon, tmpu, tmpl, flg;
   265		u64 tmp;
   266	
   267		/* Sync detection */
   268		regmap_read(r_s, CPMON1_S, &cpmon);
   269	
   270		*status = 0;
   271		if (cpmon & CPMON1_S_FSYNC)
   272			*status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
   273		if (cpmon & CPMON1_S_W2LOCK)
   274			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
   275	
   276		/* Signal strength */
   277		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
   278	
   279		if (*status & FE_HAS_SIGNAL) {
   280			u32 agc;
   281	
   282			regmap_read(r_s, AGCREAD_S, &tmpu);
   283			agc = tmpu << 8;
   284	
   285			c->strength.len = 1;
   286			c->strength.stat[0].scale = FE_SCALE_RELATIVE;
   287			c->strength.stat[0].uvalue = agc;
   288		}
   289	
   290		/* C/N rate */
   291		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
   292	
   293		if (*status & FE_HAS_VITERBI) {
   294			u32 cnr = 0, x, y, d;
   295			u64 d_3 = 0;
   296	
   297			regmap_read(r_s, CNRDXU_S, &tmpu);
   298			regmap_read(r_s, CNRDXL_S, &tmpl);
   299			x = (tmpu << 8) | tmpl;
   300			regmap_read(r_s, CNRDYU_S, &tmpu);
   301			regmap_read(r_s, CNRDYL_S, &tmpl);
   302			y = (tmpu << 8) | tmpl;
   303	
   304			/* CNR[dB]: 10 * log10(D) - 30.74 / D^3 - 3 */
   305			/*   D = x^2 / (2^15 * y - x^2) */
   306			d = (y << 15) - x * x;
   307			if (d > 0) {
   308				/* (2^4 * D)^3 = 2^12 * D^3 */
   309				/* 3.074 * 2^(12 + 24) = 211243671486 */
   310				d_3 = div_u64(16 * x * x, d);
   311				d_3 = d_3 * d_3 * d_3;
   312				if (d_3)
 > 313					d_3 = div_u64(211243671486, d_3);
   314			}
   315	
   316			if (d_3) {
   317				/* 0.3 * 2^24 = 5033164 */
   318				tmp = (s64)2 * intlog10(x) - intlog10(abs(d)) - d_3
   319					- 5033164;
   320				cnr = div_u64(tmp * 10000, 1 << 24);
   321			}
   322	
   323			if (cnr) {
   324				c->cnr.len = 1;
   325				c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
   326				c->cnr.stat[0].uvalue = cnr;
   327			}
   328		}
   329	
   330		/* BER */
   331		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
   332		c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
   333	
   334		regmap_read(r_s, BERCNFLG_S, &flg);
   335	
   336		if ((*status & FE_HAS_VITERBI) && (flg & BERCNFLG_S_BERVRDY)) {
   337			u32 bit_err, bit_cnt;
   338	
   339			regmap_read(r_s, BERVRDU_S, &tmpu);
   340			regmap_read(r_s, BERVRDL_S, &tmpl);
   341			bit_err = (tmpu << 8) | tmpl;
   342			bit_cnt = (1 << 13) * 204;
   343	
   344			if (bit_cnt) {
   345				c->post_bit_error.len = 1;
   346				c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
   347				c->post_bit_error.stat[0].uvalue = bit_err;
   348				c->post_bit_count.len = 1;
   349				c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
   350				c->post_bit_count.stat[0].uvalue = bit_cnt;
   351			}
   352		}
   353	
   354		return 0;
   355	}
   356	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver
  2018-05-15  0:37 [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver Katsuhiro Suzuki
  2018-05-15  4:23 ` kbuild test robot
@ 2018-05-15  7:49 ` kbuild test robot
  1 sibling, 0 replies; 3+ messages in thread
From: kbuild test robot @ 2018-05-15  7:49 UTC (permalink / raw)
  To: Katsuhiro Suzuki
  Cc: kbuild-all, Mauro Carvalho Chehab, linux-media, Masami Hiramatsu,
	Jassi Brar, linux-arm-kernel, linux-kernel, Katsuhiro Suzuki

[-- Attachment #1: Type: text/plain, Size: 1042 bytes --]

Hi Katsuhiro,

I love your patch! Yet something to improve:

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.17-rc5 next-20180514]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Katsuhiro-Suzuki/media-dvb-frontends-add-Socionext-SC1501A-ISDB-S-T-demodulator-driver/20180515-091453
base:   git://linuxtv.org/media_tree.git master
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/media/dvb-frontends/sc1501a.o: In function `sc1501a_set_frontend':
>> sc1501a.c:(.text+0xbe0): undefined reference to `__divdi3'
   sc1501a.c:(.text+0xc01): undefined reference to `__divdi3'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 62660 bytes --]

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-05-15  7:49 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-15  0:37 [PATCH] media: dvb-frontends: add Socionext SC1501A ISDB-S/T demodulator driver Katsuhiro Suzuki
2018-05-15  4:23 ` kbuild test robot
2018-05-15  7:49 ` kbuild test robot

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