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https://github.com/edk2-porting/linux-next.git
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e7848163aa
Cards with identical PCI ids but no AC97 config in EEPROM do not have the ac97 field initialized. We must check for this case to avoid kernel oops. Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/*
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* ALSA driver for ICEnsemble VT1724 (Envy24HT)
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*
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* Lowlevel functions for Advanced Micro Peripherals Ltd AUDIO2000
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*
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* Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <asm/io.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <sound/core.h>
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#include "ice1712.h"
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#include "envy24ht.h"
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#include "amp.h"
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static void wm_put(struct snd_ice1712 *ice, int reg, unsigned short val)
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{
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unsigned short cval;
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cval = (reg << 9) | val;
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snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
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}
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static int __devinit snd_vt1724_amp_init(struct snd_ice1712 *ice)
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{
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static const unsigned short wm_inits[] = {
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WM_ATTEN_L, 0x0000, /* 0 db */
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WM_ATTEN_R, 0x0000, /* 0 db */
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WM_DAC_CTRL, 0x0008, /* 24bit I2S */
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WM_INT_CTRL, 0x0001, /* 24bit I2S */
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};
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unsigned int i;
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/* only use basic functionality for now */
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/* VT1616 6ch codec connected to PSDOUT0 using packed mode */
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ice->num_total_dacs = 6;
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ice->num_total_adcs = 2;
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/* Chaintech AV-710 has another WM8728 codec connected to PSDOUT4
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(shared with the SPDIF output). Mixer control for this codec
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is not yet supported. */
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if (ice->eeprom.subvendor == VT1724_SUBDEVICE_AV710) {
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for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
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wm_put(ice, wm_inits[i], wm_inits[i+1]);
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}
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return 0;
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}
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static int __devinit snd_vt1724_amp_add_controls(struct snd_ice1712 *ice)
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{
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if (ice->ac97)
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/* we use pins 39 and 41 of the VT1616 for left and right
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read outputs */
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snd_ac97_write_cache(ice->ac97, 0x5a,
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snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
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return 0;
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}
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/* entry point */
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struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
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{
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.subvendor = VT1724_SUBDEVICE_AV710,
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.name = "Chaintech AV-710",
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.model = "av710",
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.chip_init = snd_vt1724_amp_init,
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.build_controls = snd_vt1724_amp_add_controls,
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},
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{
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.subvendor = VT1724_SUBDEVICE_AUDIO2000,
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.name = "AMP Ltd AUDIO2000",
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.model = "amp2000",
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.chip_init = snd_vt1724_amp_init,
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.build_controls = snd_vt1724_amp_add_controls,
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},
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{ } /* terminator */
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};
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