drivers/media/pci/cx88/cx88-tvaudio.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * cx88x-audio.c - Conexant CX23880/23881 audio downstream driver driver
 *
 *  (c) 2001 Michael Eskin, Tom Zakrajsek [Windows version]
 *  (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
 *  (c) 2003 Gerd Knorr <kraxel@bytesex.org>
 *
 * -----------------------------------------------------------------------
 *
 * Lot of voodoo here.  Even the data sheet doesn't help to
 * understand what is going on here, the documentation for the audio
 * part of the cx2388x chip is *very* bad.
 *
 * Some of this comes from party done linux driver sources I got from
 * [undocumented].
 *
 * Some comes from the dscaler sources, one of the dscaler driver guy works
 * for Conexant ...
 *
 * -----------------------------------------------------------------------
 */

#include "cx88.h"

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/freezer.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/poll.h>
#include <linux/signal.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/kthread.h>

static unsigned int audio_debug;
module_param(audio_debug, int, 0644);
MODULE_PARM_DESC(audio_debug, "enable debug messages [audio]");

static unsigned int always_analog;
module_param(always_analog, int, 0644);
MODULE_PARM_DESC(always_analog, "force analog audio out");

static unsigned int radio_deemphasis;
module_param(radio_deemphasis, int, 0644);
MODULE_PARM_DESC(radio_deemphasis,
		 "Radio deemphasis time constant, 0=None, 1=50us (elsewhere), 2=75us (USA)");

#define dprintk(fmt, arg...) do {				\
	if (audio_debug)						\
		printk(KERN_DEBUG pr_fmt("%s: tvaudio:" fmt),		\
			__func__, ##arg);				\
} while (0)
/* ----------------------------------------------------------- */

static const char * const aud_ctl_names[64] = {
	[EN_BTSC_FORCE_MONO] = "BTSC_FORCE_MONO",
	[EN_BTSC_FORCE_STEREO] = "BTSC_FORCE_STEREO",
	[EN_BTSC_FORCE_SAP] = "BTSC_FORCE_SAP",
	[EN_BTSC_AUTO_STEREO] = "BTSC_AUTO_STEREO",
	[EN_BTSC_AUTO_SAP] = "BTSC_AUTO_SAP",
	[EN_A2_FORCE_MONO1] = "A2_FORCE_MONO1",
	[EN_A2_FORCE_MONO2] = "A2_FORCE_MONO2",
	[EN_A2_FORCE_STEREO] = "A2_FORCE_STEREO",
	[EN_A2_AUTO_MONO2] = "A2_AUTO_MONO2",
	[EN_A2_AUTO_STEREO] = "A2_AUTO_STEREO",
	[EN_EIAJ_FORCE_MONO1] = "EIAJ_FORCE_MONO1",
	[EN_EIAJ_FORCE_MONO2] = "EIAJ_FORCE_MONO2",
	[EN_EIAJ_FORCE_STEREO] = "EIAJ_FORCE_STEREO",
	[EN_EIAJ_AUTO_MONO2] = "EIAJ_AUTO_MONO2",
	[EN_EIAJ_AUTO_STEREO] = "EIAJ_AUTO_STEREO",
	[EN_NICAM_FORCE_MONO1] = "NICAM_FORCE_MONO1",
	[EN_NICAM_FORCE_MONO2] = "NICAM_FORCE_MONO2",
	[EN_NICAM_FORCE_STEREO] = "NICAM_FORCE_STEREO",
	[EN_NICAM_AUTO_MONO2] = "NICAM_AUTO_MONO2",
	[EN_NICAM_AUTO_STEREO] = "NICAM_AUTO_STEREO",
	[EN_FMRADIO_FORCE_MONO] = "FMRADIO_FORCE_MONO",
	[EN_FMRADIO_FORCE_STEREO] = "FMRADIO_FORCE_STEREO",
	[EN_FMRADIO_AUTO_STEREO] = "FMRADIO_AUTO_STEREO",
};

struct rlist {
	u32 reg;
	u32 val;
};

static void set_audio_registers(struct cx88_core *core, const struct rlist *l)
{
	int i;

	for (i = 0; l[i].reg; i++) {
		switch (l[i].reg) {
		case AUD_PDF_DDS_CNST_BYTE2:
		case AUD_PDF_DDS_CNST_BYTE1:
		case AUD_PDF_DDS_CNST_BYTE0:
		case AUD_QAM_MODE:
		case AUD_PHACC_FREQ_8MSB:
		case AUD_PHACC_FREQ_8LSB:
			cx_writeb(l[i].reg, l[i].val);
			break;
		default:
			cx_write(l[i].reg, l[i].val);
			break;
		}
	}
}

static void set_audio_start(struct cx88_core *core, u32 mode)
{
	/* mute */
	cx_write(AUD_VOL_CTL, (1 << 6));

	/* start programming */
	cx_write(AUD_INIT, mode);
	cx_write(AUD_INIT_LD, 0x0001);
	cx_write(AUD_SOFT_RESET, 0x0001);
}

static void set_audio_finish(struct cx88_core *core, u32 ctl)
{
	u32 volume;

	/* restart dma; This avoids buzz in NICAM and is good in others  */
	cx88_stop_audio_dma(core);
	cx_write(AUD_RATE_THRES_DMD, 0x000000C0);
	cx88_start_audio_dma(core);

	if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
		cx_write(AUD_I2SINPUTCNTL, 4);
		cx_write(AUD_BAUDRATE, 1);
		/*
		 * 'pass-thru mode': this enables the i2s
		 * output to the mpeg encoder
		 */
		cx_set(AUD_CTL, EN_I2SOUT_ENABLE);
		cx_write(AUD_I2SOUTPUTCNTL, 1);
		cx_write(AUD_I2SCNTL, 0);
		/* cx_write(AUD_APB_IN_RATE_ADJ, 0); */
	}
	if ((always_analog) || (!(core->board.mpeg & CX88_MPEG_BLACKBIRD))) {
		ctl |= EN_DAC_ENABLE;
		cx_write(AUD_CTL, ctl);
	}

	/* finish programming */
	cx_write(AUD_SOFT_RESET, 0x0000);

	/* unmute */
	volume = cx_sread(SHADOW_AUD_VOL_CTL);
	cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, volume);

	core->last_change = jiffies;
}

/* ----------------------------------------------------------- */

static void set_audio_standard_BTSC(struct cx88_core *core, unsigned int sap,
				    u32 mode)
{
	static const struct rlist btsc[] = {
		{AUD_AFE_12DB_EN, 0x00000001},
		{AUD_OUT1_SEL, 0x00000013},
		{AUD_OUT1_SHIFT, 0x00000000},
		{AUD_POLY0_DDS_CONSTANT, 0x0012010c},
		{AUD_DMD_RA_DDS, 0x00c3e7aa},
		{AUD_DBX_IN_GAIN, 0x00004734},
		{AUD_DBX_WBE_GAIN, 0x00004640},
		{AUD_DBX_SE_GAIN, 0x00008d31},
		{AUD_DCOC_0_SRC, 0x0000001a},
		{AUD_IIR1_4_SEL, 0x00000021},
		{AUD_DCOC_PASS_IN, 0x00000003},
		{AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_0_SHIFT_IN1, 0x00000008},
		{AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_1_SHIFT_IN1, 0x00000008},
		{AUD_DN0_FREQ, 0x0000283b},
		{AUD_DN2_SRC_SEL, 0x00000008},
		{AUD_DN2_FREQ, 0x00003000},
		{AUD_DN2_AFC, 0x00000002},
		{AUD_DN2_SHFT, 0x00000000},
		{AUD_IIR2_2_SEL, 0x00000020},
		{AUD_IIR2_2_SHIFT, 0x00000000},
		{AUD_IIR2_3_SEL, 0x0000001f},
		{AUD_IIR2_3_SHIFT, 0x00000000},
		{AUD_CRDC1_SRC_SEL, 0x000003ce},
		{AUD_CRDC1_SHIFT, 0x00000000},
		{AUD_CORDIC_SHIFT_1, 0x00000007},
		{AUD_DCOC_1_SRC, 0x0000001b},
		{AUD_DCOC1_SHIFT, 0x00000000},
		{AUD_RDSI_SEL, 0x00000008},
		{AUD_RDSQ_SEL, 0x00000008},
		{AUD_RDSI_SHIFT, 0x00000000},
		{AUD_RDSQ_SHIFT, 0x00000000},
		{AUD_POLYPH80SCALEFAC, 0x00000003},
		{ /* end of list */ },
	};
	static const struct rlist btsc_sap[] = {
		{AUD_AFE_12DB_EN, 0x00000001},
		{AUD_DBX_IN_GAIN, 0x00007200},
		{AUD_DBX_WBE_GAIN, 0x00006200},
		{AUD_DBX_SE_GAIN, 0x00006200},
		{AUD_IIR1_1_SEL, 0x00000000},
		{AUD_IIR1_3_SEL, 0x00000001},
		{AUD_DN1_SRC_SEL, 0x00000007},
		{AUD_IIR1_4_SHIFT, 0x00000006},
		{AUD_IIR2_1_SHIFT, 0x00000000},
		{AUD_IIR2_2_SHIFT, 0x00000000},
		{AUD_IIR3_0_SHIFT, 0x00000000},
		{AUD_IIR3_1_SHIFT, 0x00000000},
		{AUD_IIR3_0_SEL, 0x0000000d},
		{AUD_IIR3_1_SEL, 0x0000000e},
		{AUD_DEEMPH1_SRC_SEL, 0x00000014},
		{AUD_DEEMPH1_SHIFT, 0x00000000},
		{AUD_DEEMPH1_G0, 0x00004000},
		{AUD_DEEMPH1_A0, 0x00000000},
		{AUD_DEEMPH1_B0, 0x00000000},
		{AUD_DEEMPH1_A1, 0x00000000},
		{AUD_DEEMPH1_B1, 0x00000000},
		{AUD_OUT0_SEL, 0x0000003f},
		{AUD_OUT1_SEL, 0x0000003f},
		{AUD_DN1_AFC, 0x00000002},
		{AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_0_SHIFT_IN1, 0x00000008},
		{AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_1_SHIFT_IN1, 0x00000008},
		{AUD_IIR1_0_SEL, 0x0000001d},
		{AUD_IIR1_2_SEL, 0x0000001e},
		{AUD_IIR2_1_SEL, 0x00000002},
		{AUD_IIR2_2_SEL, 0x00000004},
		{AUD_IIR3_2_SEL, 0x0000000f},
		{AUD_DCOC2_SHIFT, 0x00000001},
		{AUD_IIR3_2_SHIFT, 0x00000001},
		{AUD_DEEMPH0_SRC_SEL, 0x00000014},
		{AUD_CORDIC_SHIFT_1, 0x00000006},
		{AUD_POLY0_DDS_CONSTANT, 0x000e4db2},
		{AUD_DMD_RA_DDS, 0x00f696e6},
		{AUD_IIR2_3_SEL, 0x00000025},
		{AUD_IIR1_4_SEL, 0x00000021},
		{AUD_DN1_FREQ, 0x0000c965},
		{AUD_DCOC_PASS_IN, 0x00000003},
		{AUD_DCOC_0_SRC, 0x0000001a},
		{AUD_DCOC_1_SRC, 0x0000001b},
		{AUD_DCOC1_SHIFT, 0x00000000},
		{AUD_RDSI_SEL, 0x00000009},
		{AUD_RDSQ_SEL, 0x00000009},
		{AUD_RDSI_SHIFT, 0x00000000},
		{AUD_RDSQ_SHIFT, 0x00000000},
		{AUD_POLYPH80SCALEFAC, 0x00000003},
		{ /* end of list */ },
	};

	mode |= EN_FMRADIO_EN_RDS;

	if (sap) {
		dprintk("%s SAP (status: unknown)\n", __func__);
		set_audio_start(core, SEL_SAP);
		set_audio_registers(core, btsc_sap);
		set_audio_finish(core, mode);
	} else {
		dprintk("%s (status: known-good)\n", __func__);
		set_audio_start(core, SEL_BTSC);
		set_audio_registers(core, btsc);
		set_audio_finish(core, mode);
	}
}

static void set_audio_standard_NICAM(struct cx88_core *core, u32 mode)
{
	static const struct rlist nicam_l[] = {
		{AUD_AFE_12DB_EN, 0x00000001},
		{AUD_RATE_ADJ1, 0x00000060},
		{AUD_RATE_ADJ2, 0x000000F9},
		{AUD_RATE_ADJ3, 0x000001CC},
		{AUD_RATE_ADJ4, 0x000002B3},
		{AUD_RATE_ADJ5, 0x00000726},
		{AUD_DEEMPHDENOM1_R, 0x0000F3D0},
		{AUD_DEEMPHDENOM2_R, 0x00000000},
		{AUD_ERRLOGPERIOD_R, 0x00000064},
		{AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
		{AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
		{AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
		{AUD_POLYPH80SCALEFAC, 0x00000003},
		{AUD_DMD_RA_DDS, 0x00C00000},
		{AUD_PLL_INT, 0x0000001E},
		{AUD_PLL_DDS, 0x00000000},
		{AUD_PLL_FRAC, 0x0000E542},
		{AUD_START_TIMER, 0x00000000},
		{AUD_DEEMPHNUMER1_R, 0x000353DE},
		{AUD_DEEMPHNUMER2_R, 0x000001B1},
		{AUD_PDF_DDS_CNST_BYTE2, 0x06},
		{AUD_PDF_DDS_CNST_BYTE1, 0x82},
		{AUD_PDF_DDS_CNST_BYTE0, 0x12},
		{AUD_QAM_MODE, 0x05},
		{AUD_PHACC_FREQ_8MSB, 0x34},
		{AUD_PHACC_FREQ_8LSB, 0x4C},
		{AUD_DEEMPHGAIN_R, 0x00006680},
		{AUD_RATE_THRES_DMD, 0x000000C0},
		{ /* end of list */ },
	};

	static const struct rlist nicam_bgdki_common[] = {
		{AUD_AFE_12DB_EN, 0x00000001},
		{AUD_RATE_ADJ1, 0x00000010},
		{AUD_RATE_ADJ2, 0x00000040},
		{AUD_RATE_ADJ3, 0x00000100},
		{AUD_RATE_ADJ4, 0x00000400},
		{AUD_RATE_ADJ5, 0x00001000},
		{AUD_ERRLOGPERIOD_R, 0x00000fff},
		{AUD_ERRINTRPTTHSHLD1_R, 0x000003ff},
		{AUD_ERRINTRPTTHSHLD2_R, 0x000000ff},
		{AUD_ERRINTRPTTHSHLD3_R, 0x0000003f},
		{AUD_POLYPH80SCALEFAC, 0x00000003},
		{AUD_DEEMPHGAIN_R, 0x000023c2},
		{AUD_DEEMPHNUMER1_R, 0x0002a7bc},
		{AUD_DEEMPHNUMER2_R, 0x0003023e},
		{AUD_DEEMPHDENOM1_R, 0x0000f3d0},
		{AUD_DEEMPHDENOM2_R, 0x00000000},
		{AUD_PDF_DDS_CNST_BYTE2, 0x06},
		{AUD_PDF_DDS_CNST_BYTE1, 0x82},
		{AUD_QAM_MODE, 0x05},
		{ /* end of list */ },
	};

	static const struct rlist nicam_i[] = {
		{AUD_PDF_DDS_CNST_BYTE0, 0x12},
		{AUD_PHACC_FREQ_8MSB, 0x3a},
		{AUD_PHACC_FREQ_8LSB, 0x93},
		{ /* end of list */ },
	};

	static const struct rlist nicam_default[] = {
		{AUD_PDF_DDS_CNST_BYTE0, 0x16},
		{AUD_PHACC_FREQ_8MSB, 0x34},
		{AUD_PHACC_FREQ_8LSB, 0x4c},
		{ /* end of list */ },
	};

	set_audio_start(core, SEL_NICAM);
	switch (core->tvaudio) {
	case WW_L:
		dprintk("%s SECAM-L NICAM (status: devel)\n", __func__);
		set_audio_registers(core, nicam_l);
		break;
	case WW_I:
		dprintk("%s PAL-I NICAM (status: known-good)\n", __func__);
		set_audio_registers(core, nicam_bgdki_common);
		set_audio_registers(core, nicam_i);
		break;
	case WW_NONE:
	case WW_BTSC:
	case WW_BG:
	case WW_DK:
	case WW_EIAJ:
	case WW_I2SPT:
	case WW_FM:
	case WW_I2SADC:
	case WW_M:
		dprintk("%s PAL-BGDK NICAM (status: known-good)\n", __func__);
		set_audio_registers(core, nicam_bgdki_common);
		set_audio_registers(core, nicam_default);
		break;
	}

	mode |= EN_DMTRX_LR | EN_DMTRX_BYPASS;
	set_audio_finish(core, mode);
}

static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
{
	static const struct rlist a2_bgdk_common[] = {
		{AUD_ERRLOGPERIOD_R, 0x00000064},
		{AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
		{AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
		{AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
		{AUD_PDF_DDS_CNST_BYTE2, 0x06},
		{AUD_PDF_DDS_CNST_BYTE1, 0x82},
		{AUD_PDF_DDS_CNST_BYTE0, 0x12},
		{AUD_QAM_MODE, 0x05},
		{AUD_PHACC_FREQ_8MSB, 0x34},
		{AUD_PHACC_FREQ_8LSB, 0x4c},
		{AUD_RATE_ADJ1, 0x00000100},
		{AUD_RATE_ADJ2, 0x00000200},
		{AUD_RATE_ADJ3, 0x00000300},
		{AUD_RATE_ADJ4, 0x00000400},
		{AUD_RATE_ADJ5, 0x00000500},
		{AUD_THR_FR, 0x00000000},
		{AAGC_HYST, 0x0000001a},
		{AUD_PILOT_BQD_1_K0, 0x0000755b},
		{AUD_PILOT_BQD_1_K1, 0x00551340},
		{AUD_PILOT_BQD_1_K2, 0x006d30be},
		{AUD_PILOT_BQD_1_K3, 0xffd394af},
		{AUD_PILOT_BQD_1_K4, 0x00400000},
		{AUD_PILOT_BQD_2_K0, 0x00040000},
		{AUD_PILOT_BQD_2_K1, 0x002a4841},
		{AUD_PILOT_BQD_2_K2, 0x00400000},
		{AUD_PILOT_BQD_2_K3, 0x00000000},
		{AUD_PILOT_BQD_2_K4, 0x00000000},
		{AUD_MODE_CHG_TIMER, 0x00000040},
		{AUD_AFE_12DB_EN, 0x00000001},
		{AUD_CORDIC_SHIFT_0, 0x00000007},
		{AUD_CORDIC_SHIFT_1, 0x00000007},
		{AUD_DEEMPH0_G0, 0x00000380},
		{AUD_DEEMPH1_G0, 0x00000380},
		{AUD_DCOC_0_SRC, 0x0000001a},
		{AUD_DCOC0_SHIFT, 0x00000000},
		{AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_0_SHIFT_IN1, 0x00000008},
		{AUD_DCOC_PASS_IN, 0x00000003},
		{AUD_IIR3_0_SEL, 0x00000021},
		{AUD_DN2_AFC, 0x00000002},
		{AUD_DCOC_1_SRC, 0x0000001b},
		{AUD_DCOC1_SHIFT, 0x00000000},
		{AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_1_SHIFT_IN1, 0x00000008},
		{AUD_IIR3_1_SEL, 0x00000023},
		{AUD_RDSI_SEL, 0x00000017},
		{AUD_RDSI_SHIFT, 0x00000000},
		{AUD_RDSQ_SEL, 0x00000017},
		{AUD_RDSQ_SHIFT, 0x00000000},
		{AUD_PLL_INT, 0x0000001e},
		{AUD_PLL_DDS, 0x00000000},
		{AUD_PLL_FRAC, 0x0000e542},
		{AUD_POLYPH80SCALEFAC, 0x00000001},
		{AUD_START_TIMER, 0x00000000},
		{ /* end of list */ },
	};

	static const struct rlist a2_bg[] = {
		{AUD_DMD_RA_DDS, 0x002a4f2f},
		{AUD_C1_UP_THR, 0x00007000},
		{AUD_C1_LO_THR, 0x00005400},
		{AUD_C2_UP_THR, 0x00005400},
		{AUD_C2_LO_THR, 0x00003000},
		{ /* end of list */ },
	};

	static const struct rlist a2_dk[] = {
		{AUD_DMD_RA_DDS, 0x002a4f2f},
		{AUD_C1_UP_THR, 0x00007000},
		{AUD_C1_LO_THR, 0x00005400},
		{AUD_C2_UP_THR, 0x00005400},
		{AUD_C2_LO_THR, 0x00003000},
		{AUD_DN0_FREQ, 0x00003a1c},
		{AUD_DN2_FREQ, 0x0000d2e0},
		{ /* end of list */ },
	};

	static const struct rlist a1_i[] = {
		{AUD_ERRLOGPERIOD_R, 0x00000064},
		{AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
		{AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
		{AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
		{AUD_PDF_DDS_CNST_BYTE2, 0x06},
		{AUD_PDF_DDS_CNST_BYTE1, 0x82},
		{AUD_PDF_DDS_CNST_BYTE0, 0x12},
		{AUD_QAM_MODE, 0x05},
		{AUD_PHACC_FREQ_8MSB, 0x3a},
		{AUD_PHACC_FREQ_8LSB, 0x93},
		{AUD_DMD_RA_DDS, 0x002a4f2f},
		{AUD_PLL_INT, 0x0000001e},
		{AUD_PLL_DDS, 0x00000004},
		{AUD_PLL_FRAC, 0x0000e542},
		{AUD_RATE_ADJ1, 0x00000100},
		{AUD_RATE_ADJ2, 0x00000200},
		{AUD_RATE_ADJ3, 0x00000300},
		{AUD_RATE_ADJ4, 0x00000400},
		{AUD_RATE_ADJ5, 0x00000500},
		{AUD_THR_FR, 0x00000000},
		{AUD_PILOT_BQD_1_K0, 0x0000755b},
		{AUD_PILOT_BQD_1_K1, 0x00551340},
		{AUD_PILOT_BQD_1_K2, 0x006d30be},
		{AUD_PILOT_BQD_1_K3, 0xffd394af},
		{AUD_PILOT_BQD_1_K4, 0x00400000},
		{AUD_PILOT_BQD_2_K0, 0x00040000},
		{AUD_PILOT_BQD_2_K1, 0x002a4841},
		{AUD_PILOT_BQD_2_K2, 0x00400000},
		{AUD_PILOT_BQD_2_K3, 0x00000000},
		{AUD_PILOT_BQD_2_K4, 0x00000000},
		{AUD_MODE_CHG_TIMER, 0x00000060},
		{AUD_AFE_12DB_EN, 0x00000001},
		{AAGC_HYST, 0x0000000a},
		{AUD_CORDIC_SHIFT_0, 0x00000007},
		{AUD_CORDIC_SHIFT_1, 0x00000007},
		{AUD_C1_UP_THR, 0x00007000},
		{AUD_C1_LO_THR, 0x00005400},
		{AUD_C2_UP_THR, 0x00005400},
		{AUD_C2_LO_THR, 0x00003000},
		{AUD_DCOC_0_SRC, 0x0000001a},
		{AUD_DCOC0_SHIFT, 0x00000000},
		{AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_0_SHIFT_IN1, 0x00000008},
		{AUD_DCOC_PASS_IN, 0x00000003},
		{AUD_IIR3_0_SEL, 0x00000021},
		{AUD_DN2_AFC, 0x00000002},
		{AUD_DCOC_1_SRC, 0x0000001b},
		{AUD_DCOC1_SHIFT, 0x00000000},
		{AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
		{AUD_DCOC_1_SHIFT_IN1, 0x00000008},
		{AUD_IIR3_1_SEL, 0x00000023},
		{AUD_DN0_FREQ, 0x000035a3},
		{AUD_DN2_FREQ, 0x000029c7},
		{AUD_CRDC0_SRC_SEL, 0x00000511},
		{AUD_IIR1_0_SEL, 0x00000001},
		{AUD_IIR1_1_SEL, 0x00000000},
		{AUD_IIR3_2_SEL, 0x00000003},
		{AUD_IIR3_2_SHIFT, 0x00000000},
		{AUD_IIR3_0_SEL, 0x00000002},
		{AUD_IIR2_0_SEL, 0x00000021},
		{AUD_IIR2_0_SHIFT, 0x00000002},
		{AUD_DEEMPH0_SRC_SEL, 0x0000000b},
		{AUD_DEEMPH1_SRC_SEL, 0x0000000b},
		{AUD_POLYPH80SCALEFAC, 0x00000001},
		{AUD_START_TIMER, 0x00000000},
		{ /* end of list */ },
	};

	static const struct rlist am_l[] = {
		{AUD_ERRLOGPERIOD_R, 0x00000064},
		{AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
		{AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
		{AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
		{AUD_PDF_DDS_CNST_BYTE2, 0x48},
		{AUD_PDF_DDS_CNST_BYTE1, 0x3D},
		{AUD_QAM_MODE, 0x00},
		{AUD_PDF_DDS_CNST_BYTE0, 0xf5},
		{AUD_PHACC_FREQ_8MSB, 0x3a},
		{AUD_PHACC_FREQ_8LSB, 0x4a},
		{AUD_DEEMPHGAIN_R, 0x00006680},
		{AUD_DEEMPHNUMER1_R, 0x000353DE},
		{AUD_DEEMPHNUMER2_R, 0x000001B1},
		{AUD_DEEMPHDENOM1_R, 0x0000F3D0},
		{AUD_DEEMPHDENOM2_R, 0x00000000},
		{AUD_FM_MODE_ENABLE, 0x00000007},
		{AUD_POLYPH80SCALEFAC, 0x00000003},
		{AUD_AFE_12DB_EN, 0x00000001},
		{AAGC_GAIN, 0x00000000},
		{AAGC_HYST, 0x00000018},
		{AAGC_DEF, 0x00000020},
		{AUD_DN0_FREQ, 0x00000000},
		{AUD_POLY0_DDS_CONSTANT, 0x000E4DB2},
		{AUD_DCOC_0_SRC, 0x00000021},
		{AUD_IIR1_0_SEL, 0x00000000},
		{AUD_IIR1_0_SHIFT, 0x00000007},
		{AUD_IIR1_1_SEL, 0x00000002},
		{AUD_IIR1_1_SHIFT, 0x00000000},
		{AUD_DCOC_1_SRC, 0x00000003},
		{AUD_DCOC1_SHIFT, 0x00000000},
		{AUD_DCOC_PASS_IN, 0x00000000},
		{AUD_IIR1_2_SEL, 0x00000023},
		{AUD_IIR1_2_SHIFT, 0x00000000},
		{AUD_IIR1_3_SEL, 0x00000004},
		{AUD_IIR1_3_SHIFT, 0x00000007},
		{AUD_IIR1_4_SEL, 0x00000005},
		{AUD_IIR1_4_SHIFT, 0x00000007},
		{AUD_IIR3_0_SEL, 0x00000007},
		{AUD_IIR3_0_SHIFT, 0x00000000},
		{AUD_DEEMPH0_SRC_SEL, 0x00000011},
		{AUD_DEEMPH0_SHIFT, 0x00000000},
		{AUD_DEEMPH0_G0, 0x00007000},
		{AUD_DEEMPH0_A0, 0x00000000},
		{AUD_DEEMPH0_B0, 0x00000000},
		{AUD_DEEMPH0_A1, 0x00000000},
		{AUD_DEEMPH0_B1, 0x00000000},
		{AUD_DEEMPH1_SRC_SEL, 0x00000011},
		{AUD_DEEMPH1_SHIFT, 0x00000000},
		{AUD_DEEMPH1_G0, 0x00007000},
		{AUD_DEEMPH1_A0, 0x00000000},
		{AUD_DEEMPH1_B0, 0x00000000},
		{AUD_DEEMPH1_A1, 0x00000000},
		{AUD_DEEMPH1_B1, 0x00000000},
		{AUD_OUT0_SEL, 0x0000003F},
		{AUD_OUT1_SEL, 0x0000003F},
		{AUD_DMD_RA_DDS, 0x00F5C285},
		{AUD_PLL_INT, 0x0000001E},
		{AUD_PLL_DDS, 0x00000000},
		{AUD_PLL_FRAC, 0x0000E542},
		{AUD_RATE_ADJ1, 0x00000100},
		{AUD_RATE_ADJ2, 0x00000200},
		{AUD_RATE_ADJ3, 0x00000300},
		{AUD_RATE_ADJ4, 0x00000400},
		{AUD_RATE_ADJ5, 0x00000500},
		{AUD_RATE_THRES_DMD, 0x000000C0},
		{ /* end of list */ },
	};

	static const struct rlist a2_deemph50[] = {
		{AUD_DEEMPH0_G0, 0x00000380},
		{AUD_DEEMPH1_G0, 0x00000380},
		{AUD_DEEMPHGAIN_R, 0x000011e1},
		{AUD_DEEMPHNUMER1_R, 0x0002a7bc},
		{AUD_DEEMPHNUMER2_R, 0x0003023c},
		{ /* end of list */ },
	};

	set_audio_start(core, SEL_A2);
	switch (core->tvaudio) {
	case WW_BG:
		dprintk("%s PAL-BG A1/2 (status: known-good)\n", __func__);
		set_audio_registers(core, a2_bgdk_common);
		set_audio_registers(core, a2_bg);
		set_audio_registers(core, a2_deemph50);
		break;
	case WW_DK:
		dprintk("%s PAL-DK A1/2 (status: known-good)\n", __func__);
		set_audio_registers(core, a2_bgdk_common);
		set_audio_registers(core, a2_dk);
		set_audio_registers(core, a2_deemph50);
		break;
	case WW_I:
		dprintk("%s PAL-I A1 (status: known-good)\n", __func__);
		set_audio_registers(core, a1_i);
		set_audio_registers(core, a2_deemph50);
		break;
	case WW_L:
		dprintk("%s AM-L (status: devel)\n", __func__);
		set_audio_registers(core, am_l);
		break;
	case WW_NONE:
	case WW_BTSC:
	case WW_EIAJ:
	case WW_I2SPT:
	case WW_FM:
	case WW_I2SADC:
	case WW_M:
		dprintk("%s Warning: wrong value\n", __func__);
		return;
	}

	mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
	set_audio_finish(core, mode);
}

static void set_audio_standard_EIAJ(struct cx88_core *core)
{
	static const struct rlist eiaj[] = {
		/* TODO: eiaj register settings are not there yet ... */

		{ /* end of list */ },
	};
	dprintk("%s (status: unknown)\n", __func__);

	set_audio_start(core, SEL_EIAJ);
	set_audio_registers(core, eiaj);
	set_audio_finish(core, EN_EIAJ_AUTO_STEREO);
}

static void set_audio_standard_FM(struct cx88_core *core,
				  enum cx88_deemph_type deemph)
{
	static const struct rlist fm_deemph_50[] = {
		{AUD_DEEMPH0_G0, 0x0C45},
		{AUD_DEEMPH0_A0, 0x6262},
		{AUD_DEEMPH0_B0, 0x1C29},
		{AUD_DEEMPH0_A1, 0x3FC66},
		{AUD_DEEMPH0_B1, 0x399A},

		{AUD_DEEMPH1_G0, 0x0D80},
		{AUD_DEEMPH1_A0, 0x6262},
		{AUD_DEEMPH1_B0, 0x1C29},
		{AUD_DEEMPH1_A1, 0x3FC66},
		{AUD_DEEMPH1_B1, 0x399A},

		{AUD_POLYPH80SCALEFAC, 0x0003},
		{ /* end of list */ },
	};
	static const struct rlist fm_deemph_75[] = {
		{AUD_DEEMPH0_G0, 0x091B},
		{AUD_DEEMPH0_A0, 0x6B68},
		{AUD_DEEMPH0_B0, 0x11EC},
		{AUD_DEEMPH0_A1, 0x3FC66},
		{AUD_DEEMPH0_B1, 0x399A},

		{AUD_DEEMPH1_G0, 0x0AA0},
		{AUD_DEEMPH1_A0, 0x6B68},
		{AUD_DEEMPH1_B0, 0x11EC},
		{AUD_DEEMPH1_A1, 0x3FC66},
		{AUD_DEEMPH1_B1, 0x399A},

		{AUD_POLYPH80SCALEFAC, 0x0003},
		{ /* end of list */ },
	};

	/*
	 * It is enough to leave default values?
	 *
	 * No, it's not!  The deemphasis registers are reset to the 75us
	 * values by default.  Analyzing the spectrum of the decoded audio
	 * reveals that "no deemphasis" is the same as 75 us, while the 50 us
	 * setting results in less deemphasis.
	 */
	static const struct rlist fm_no_deemph[] = {
		{AUD_POLYPH80SCALEFAC, 0x0003},
		{ /* end of list */ },
	};

	dprintk("%s (status: unknown)\n", __func__);
	set_audio_start(core, SEL_FMRADIO);

	switch (deemph) {
	default:
	case FM_NO_DEEMPH:
		set_audio_registers(core, fm_no_deemph);
		break;

	case FM_DEEMPH_50:
		set_audio_registers(core, fm_deemph_50);
		break;

	case FM_DEEMPH_75:
		set_audio_registers(core, fm_deemph_75);
		break;
	}

	set_audio_finish(core, EN_FMRADIO_AUTO_STEREO);
}

/* ----------------------------------------------------------- */

static int cx88_detect_nicam(struct cx88_core *core)
{
	int i, j = 0;

	dprintk("start nicam autodetect.\n");

	for (i = 0; i < 6; i++) {
		/* if bit1=1 then nicam is detected */
		j += ((cx_read(AUD_NICAM_STATUS2) & 0x02) >> 1);

		if (j == 1) {
			dprintk("nicam is detected.\n");
			return 1;
		}

		/* wait a little bit for next reading status */
		usleep_range(10000, 20000);
	}

	dprintk("nicam is not detected.\n");
	return 0;
}

void cx88_set_tvaudio(struct cx88_core *core)
{
	switch (core->tvaudio) {
	case WW_BTSC:
		set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
		break;
	case WW_BG:
	case WW_DK:
	case WW_M:
	case WW_I:
	case WW_L:
		/* prepare all dsp registers */
		set_audio_standard_A2(core, EN_A2_FORCE_MONO1);

		/*
		 * set nicam mode - otherwise
		 * AUD_NICAM_STATUS2 contains wrong values
		 */
		set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
		if (cx88_detect_nicam(core) == 0) {
			/* fall back to fm / am mono */
			set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
			core->audiomode_current = V4L2_TUNER_MODE_MONO;
			core->use_nicam = 0;
		} else {
			core->use_nicam = 1;
		}
		break;
	case WW_EIAJ:
		set_audio_standard_EIAJ(core);
		break;
	case WW_FM:
		set_audio_standard_FM(core, radio_deemphasis);
		break;
	case WW_I2SADC:
		set_audio_start(core, 0x01);
		/*
		 * Slave/Philips/Autobaud
		 * NB on Nova-S bit1 NPhilipsSony appears to be inverted:
		 *	0= Sony, 1=Philips
		 */
		cx_write(AUD_I2SINPUTCNTL, core->board.i2sinputcntl);
		/* Switch to "I2S ADC mode" */
		cx_write(AUD_I2SCNTL, 0x1);
		set_audio_finish(core, EN_I2SIN_ENABLE);
		break;
	case WW_NONE:
	case WW_I2SPT:
		pr_info("unknown tv audio mode [%d]\n", core->tvaudio);
		break;
	}
}
EXPORT_SYMBOL(cx88_set_tvaudio);

void cx88_newstation(struct cx88_core *core)
{
	core->audiomode_manual = UNSET;
	core->last_change = jiffies;
}
EXPORT_SYMBOL(cx88_newstation);

void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
{
	static const char * const m[] = { "stereo", "dual mono",
					  "mono",   "sap" };
	static const char * const p[] = { "no pilot", "pilot c1",
					  "pilot c2", "?" };
	u32 reg, mode, pilot;

	reg = cx_read(AUD_STATUS);
	mode = reg & 0x03;
	pilot = (reg >> 2) & 0x03;

	if (core->astat != reg)
		dprintk("AUD_STATUS: 0x%x [%s/%s] ctl=%s\n",
			reg, m[mode], p[pilot],
			aud_ctl_names[cx_read(AUD_CTL) & 63]);
	core->astat = reg;

	t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP |
	    V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
	t->rxsubchans = UNSET;
	t->audmode = V4L2_TUNER_MODE_MONO;

	switch (mode) {
	case 0:
		t->audmode = V4L2_TUNER_MODE_STEREO;
		break;
	case 1:
		t->audmode = V4L2_TUNER_MODE_LANG2;
		break;
	case 2:
		t->audmode = V4L2_TUNER_MODE_MONO;
		break;
	case 3:
		t->audmode = V4L2_TUNER_MODE_SAP;
		break;
	}

	switch (core->tvaudio) {
	case WW_BTSC:
	case WW_BG:
	case WW_DK:
	case WW_M:
	case WW_EIAJ:
		if (!core->use_nicam) {
			t->rxsubchans = cx88_dsp_detect_stereo_sap(core);
			break;
		}
		break;
	case WW_NONE:
	case WW_I:
	case WW_L:
	case WW_I2SPT:
	case WW_FM:
	case WW_I2SADC:
		/* nothing */
		break;
	}

	/* If software stereo detection is not supported... */
	if (t->rxsubchans == UNSET) {
		t->rxsubchans = V4L2_TUNER_SUB_MONO;
		/*
		 * If the hardware itself detected stereo, also return
		 * stereo as an available subchannel
		 */
		if (t->audmode == V4L2_TUNER_MODE_STEREO)
			t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
	}
}
EXPORT_SYMBOL(cx88_get_stereo);


void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
{
	u32 ctl = UNSET;
	u32 mask = UNSET;

	if (manual) {
		core->audiomode_manual = mode;
	} else {
		if (core->audiomode_manual != UNSET)
			return;
	}
	core->audiomode_current = mode;

	switch (core->tvaudio) {
	case WW_BTSC:
		switch (mode) {
		case V4L2_TUNER_MODE_MONO:
			set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_MONO);
			break;
		case V4L2_TUNER_MODE_LANG1:
			set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
			break;
		case V4L2_TUNER_MODE_LANG2:
			set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
			break;
		case V4L2_TUNER_MODE_STEREO:
		case V4L2_TUNER_MODE_LANG1_LANG2:
			set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
			break;
		}
		break;
	case WW_BG:
	case WW_DK:
	case WW_M:
	case WW_I:
	case WW_L:
		if (core->use_nicam == 1) {
			switch (mode) {
			case V4L2_TUNER_MODE_MONO:
			case V4L2_TUNER_MODE_LANG1:
				set_audio_standard_NICAM(core,
							 EN_NICAM_FORCE_MONO1);
				break;
			case V4L2_TUNER_MODE_LANG2:
				set_audio_standard_NICAM(core,
							 EN_NICAM_FORCE_MONO2);
				break;
			case V4L2_TUNER_MODE_STEREO:
			case V4L2_TUNER_MODE_LANG1_LANG2:
				set_audio_standard_NICAM(core,
							 EN_NICAM_FORCE_STEREO);
				break;
			}
		} else {
			if ((core->tvaudio == WW_I) ||
			    (core->tvaudio == WW_L)) {
				/* fall back to fm / am mono */
				set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
			} else {
				/* TODO: Add A2 autodection */
				mask = 0x3f;
				switch (mode) {
				case V4L2_TUNER_MODE_MONO:
				case V4L2_TUNER_MODE_LANG1:
					ctl = EN_A2_FORCE_MONO1;
					break;
				case V4L2_TUNER_MODE_LANG2:
					ctl = EN_A2_FORCE_MONO2;
					break;
				case V4L2_TUNER_MODE_STEREO:
				case V4L2_TUNER_MODE_LANG1_LANG2:
					ctl = EN_A2_FORCE_STEREO;
					break;
				}
			}
		}
		break;
	case WW_FM:
		switch (mode) {
		case V4L2_TUNER_MODE_MONO:
			ctl = EN_FMRADIO_FORCE_MONO;
			mask = 0x3f;
			break;
		case V4L2_TUNER_MODE_STEREO:
			ctl = EN_FMRADIO_AUTO_STEREO;
			mask = 0x3f;
			break;
		}
		break;
	case WW_I2SADC:
	case WW_NONE:
	case WW_EIAJ:
	case WW_I2SPT:
		/* DO NOTHING */
		break;
	}

	if (ctl != UNSET) {
		dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x [status=0x%x,ctl=0x%x,vol=0x%x]\n",
			mask, ctl, cx_read(AUD_STATUS),
			cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
		cx_andor(AUD_CTL, mask, ctl);
	}
}
EXPORT_SYMBOL(cx88_set_stereo);

int cx88_audio_thread(void *data)
{
	struct cx88_core *core = data;
	struct v4l2_tuner t;
	u32 mode = 0;

	dprintk("cx88: tvaudio thread started\n");
	set_freezable();
	for (;;) {
		msleep_interruptible(1000);
		if (kthread_should_stop())
			break;
		try_to_freeze();

		switch (core->tvaudio) {
		case WW_BG:
		case WW_DK:
		case WW_M:
		case WW_I:
		case WW_L:
			if (core->use_nicam)
				goto hw_autodetect;

			/* just monitor the audio status for now ... */
			memset(&t, 0, sizeof(t));
			cx88_get_stereo(core, &t);

			if (core->audiomode_manual != UNSET)
				/* manually set, don't do anything. */
				continue;

			/* monitor signal and set stereo if available */
			if (t.rxsubchans & V4L2_TUNER_SUB_STEREO)
				mode = V4L2_TUNER_MODE_STEREO;
			else
				mode = V4L2_TUNER_MODE_MONO;
			if (mode == core->audiomode_current)
				continue;
			/* automatically switch to best available mode */
			cx88_set_stereo(core, mode, 0);
			break;
		case WW_NONE:
		case WW_BTSC:
		case WW_EIAJ:
		case WW_I2SPT:
		case WW_FM:
		case WW_I2SADC:
hw_autodetect:
			/*
			 * stereo autodetection is supported by hardware so
			 * we don't need to do it manually. Do nothing.
			 */
			break;
		}
	}

	dprintk("cx88: tvaudio thread exiting\n");
	return 0;
}
EXPORT_SYMBOL(cx88_audio_thread);