cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

amp.c (2077B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
      4 *
      5 *   Lowlevel functions for Advanced Micro Peripherals Ltd AUDIO2000
      6 *
      7 *	Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
      8 */      
      9
     10#include <linux/delay.h>
     11#include <linux/interrupt.h>
     12#include <linux/init.h>
     13#include <sound/core.h>
     14
     15#include "ice1712.h"
     16#include "envy24ht.h"
     17#include "amp.h"
     18
     19static void wm_put(struct snd_ice1712 *ice, int reg, unsigned short val)
     20{
     21	unsigned short cval;
     22	cval = (reg << 9) | val;
     23	snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
     24}
     25
     26static int snd_vt1724_amp_init(struct snd_ice1712 *ice)
     27{
     28	static const unsigned short wm_inits[] = {
     29		WM_ATTEN_L,	0x0000,	/* 0 db */
     30		WM_ATTEN_R,	0x0000,	/* 0 db */
     31		WM_DAC_CTRL,	0x0008,	/* 24bit I2S */
     32		WM_INT_CTRL,	0x0001, /* 24bit I2S */	
     33	};
     34
     35	unsigned int i;
     36
     37	/* only use basic functionality for now */
     38
     39	/* VT1616 6ch codec connected to PSDOUT0 using packed mode */
     40	ice->num_total_dacs = 6;
     41	ice->num_total_adcs = 2;
     42
     43	/* Chaintech AV-710 has another WM8728 codec connected to PSDOUT4
     44	   (shared with the SPDIF output). Mixer control for this codec
     45	   is not yet supported. */
     46	if (ice->eeprom.subvendor == VT1724_SUBDEVICE_AV710) {
     47		for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
     48			wm_put(ice, wm_inits[i], wm_inits[i+1]);
     49	}
     50
     51	return 0;
     52}
     53
     54static int snd_vt1724_amp_add_controls(struct snd_ice1712 *ice)
     55{
     56	if (ice->ac97)
     57		/* we use pins 39 and 41 of the VT1616 for left and right
     58		read outputs */
     59		snd_ac97_write_cache(ice->ac97, 0x5a,
     60			snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
     61	return 0;
     62}
     63
     64
     65/* entry point */
     66struct snd_ice1712_card_info snd_vt1724_amp_cards[] = {
     67	{
     68		.subvendor = VT1724_SUBDEVICE_AV710,
     69		.name = "Chaintech AV-710",
     70		.model = "av710",
     71		.chip_init = snd_vt1724_amp_init,
     72		.build_controls = snd_vt1724_amp_add_controls,
     73	},
     74	{
     75		.subvendor = VT1724_SUBDEVICE_AUDIO2000,
     76		.name = "AMP Ltd AUDIO2000",
     77		.model = "amp2000",
     78		.chip_init = snd_vt1724_amp_init,
     79		.build_controls = snd_vt1724_amp_add_controls,
     80	},
     81	{ } /* terminator */
     82};
     83