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via82xx.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA driver for VIA VT82xx (South Bridge)
*
* VT82C686A/B/C, VT8233A/C, VT8235
*
* Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
* Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
* 2002 Takashi Iwai <tiwai@suse.de>
*/
/*
* Changes:
*
* Dec. 19, 2002 Takashi Iwai <tiwai@suse.de>
* - use the DSX channels for the first pcm playback.
* (on VIA8233, 8233C and 8235 only)
* this will allow you play simultaneously up to 4 streams.
* multi-channel playback is assigned to the second device
* on these chips.
* - support the secondary capture (on VIA8233/C,8235)
* - SPDIF support
* the DSX3 channel can be used for SPDIF output.
* on VIA8233A, this channel is assigned to the second pcm
* playback.
* the card config of alsa-lib will assign the correct
* device for applications.
* - clean up the code, separate low-level initialization
* routines for each chipset.
*
* Sep. 26, 2005 Karsten Wiese <annabellesgarden@yahoo.de>
* - Optimize position calculation for the 823x chips.
*/
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/tlv.h>
#include <sound/ac97_codec.h>
#include <sound/mpu401.h>
#include <sound/initval.h>
#if 0
#define POINTER_DEBUG
#endif
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("VIA VT82xx audio");
MODULE_LICENSE("GPL");
#if IS_REACHABLE(CONFIG_GAMEPORT)
#define SUPPORT_JOYSTICK 1
#endif
static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
static long mpu_port;
#ifdef SUPPORT_JOYSTICK
static bool joystick;
#endif
static int ac97_clock = 48000;
static char *ac97_quirk;
static int dxs_support;
static int dxs_init_volume = 31;
static int nodelay;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
module_param_hw(mpu_port, long, ioport, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port. (VT82C686x only)");
#ifdef SUPPORT_JOYSTICK
module_param(joystick, bool, 0444);
MODULE_PARM_DESC(joystick, "Enable joystick. (VT82C686x only)");
#endif
module_param(ac97_clock, int, 0444);
MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
module_param(ac97_quirk, charp, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
module_param(dxs_support, int, 0444);
MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA, 5 = enable any sample rate)");
module_param(dxs_init_volume, int, 0644);
MODULE_PARM_DESC(dxs_init_volume, "initial DXS volume (0-31)");
module_param(nodelay, int, 0444);
MODULE_PARM_DESC(nodelay, "Disable 500ms init delay");
/* just for backward compatibility */
static bool enable;
module_param(enable, bool, 0444);
/* revision numbers for via686 */
#define VIA_REV_686_A 0x10
#define VIA_REV_686_B 0x11
#define VIA_REV_686_C 0x12
#define VIA_REV_686_D 0x13
#define VIA_REV_686_E 0x14
#define VIA_REV_686_H 0x20
/* revision numbers for via8233 */
#define VIA_REV_PRE_8233 0x10 /* not in market */
#define VIA_REV_8233C 0x20 /* 2 rec, 4 pb, 1 multi-pb */
#define VIA_REV_8233 0x30 /* 2 rec, 4 pb, 1 multi-pb, spdif */
#define VIA_REV_8233A 0x40 /* 1 rec, 1 multi-pb, spdf */
#define VIA_REV_8235 0x50 /* 2 rec, 4 pb, 1 multi-pb, spdif */
#define VIA_REV_8237 0x60
#define VIA_REV_8251 0x70
/*
* Direct registers
*/
#define VIAREG(via, x) ((via)->port + VIA_REG_##x)
#define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
/* common offsets */
#define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
#define VIA_REG_STAT_ACTIVE 0x80 /* RO */
#define VIA8233_SHADOW_STAT_ACTIVE 0x08 /* RO */
#define VIA_REG_STAT_PAUSED 0x40 /* RO */
#define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
#define VIA_REG_STAT_STOPPED 0x04 /* RWC */
#define VIA_REG_STAT_EOL 0x02 /* RWC */
#define VIA_REG_STAT_FLAG 0x01 /* RWC */
#define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
#define VIA_REG_CTRL_START 0x80 /* WO */
#define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
#define VIA_REG_CTRL_AUTOSTART 0x20
#define VIA_REG_CTRL_PAUSE 0x08 /* RW */
#define VIA_REG_CTRL_INT_STOP 0x04
#define VIA_REG_CTRL_INT_EOL 0x02
#define VIA_REG_CTRL_INT_FLAG 0x01
#define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
#define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
#define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
#define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
#define VIA_REG_TYPE_16BIT 0x20 /* RW */
#define VIA_REG_TYPE_STEREO 0x10 /* RW */
#define VIA_REG_TYPE_INT_LLINE 0x00
#define VIA_REG_TYPE_INT_LSAMPLE 0x04
#define VIA_REG_TYPE_INT_LESSONE 0x08
#define VIA_REG_TYPE_INT_MASK 0x0c
#define VIA_REG_TYPE_INT_EOL 0x02
#define VIA_REG_TYPE_INT_FLAG 0x01
#define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
#define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
#define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
#define VIA8233_REG_TYPE_16BIT 0x00200000 /* RW */
#define VIA8233_REG_TYPE_STEREO 0x00100000 /* RW */
#define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
#define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
#define DEFINE_VIA_REGSET(name,val) \
enum {\
VIA_REG_##name##_STATUS = (val),\
VIA_REG_##name##_CONTROL = (val) + 0x01,\
VIA_REG_##name##_TYPE = (val) + 0x02,\
VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
}
/* playback block */
DEFINE_VIA_REGSET(PLAYBACK, 0x00);
DEFINE_VIA_REGSET(CAPTURE, 0x10);
DEFINE_VIA_REGSET(FM, 0x20);
/* AC'97 */
#define VIA_REG_AC97 0x80 /* dword */
#define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
#define VIA_REG_AC97_CODEC_ID_SHIFT 30
#define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
#define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
#define VIA_REG_AC97_SECONDARY_VALID (1<<27)
#define VIA_REG_AC97_PRIMARY_VALID (1<<25)
#define VIA_REG_AC97_BUSY (1<<24)
#define VIA_REG_AC97_READ (1<<23)
#define VIA_REG_AC97_CMD_SHIFT 16
#define VIA_REG_AC97_CMD_MASK 0x7e
#define VIA_REG_AC97_DATA_SHIFT 0
#define VIA_REG_AC97_DATA_MASK 0xffff
#define VIA_REG_SGD_SHADOW 0x84 /* dword */
/* via686 */
#define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
#define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
#define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
#define VIA_REG_SGD_STAT_PB_EOL (1<<4)
#define VIA_REG_SGD_STAT_CP_EOL (1<<5)
#define VIA_REG_SGD_STAT_FM_EOL (1<<6)
#define VIA_REG_SGD_STAT_PB_STOP (1<<8)
#define VIA_REG_SGD_STAT_CP_STOP (1<<9)
#define VIA_REG_SGD_STAT_FM_STOP (1<<10)
#define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
#define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
#define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
/* via8233 */
#define VIA8233_REG_SGD_STAT_FLAG (1<<0)
#define VIA8233_REG_SGD_STAT_EOL (1<<1)
#define VIA8233_REG_SGD_STAT_STOP (1<<2)
#define VIA8233_REG_SGD_STAT_ACTIVE (1<<3)
#define VIA8233_INTR_MASK(chan) ((VIA8233_REG_SGD_STAT_FLAG|VIA8233_REG_SGD_STAT_EOL) << ((chan) * 4))
#define VIA8233_REG_SGD_CHAN_SDX 0
#define VIA8233_REG_SGD_CHAN_MULTI 4
#define VIA8233_REG_SGD_CHAN_REC 6
#define VIA8233_REG_SGD_CHAN_REC1 7
#define VIA_REG_GPI_STATUS 0x88
#define VIA_REG_GPI_INTR 0x8c
/* multi-channel and capture registers for via8233 */
DEFINE_VIA_REGSET(MULTPLAY, 0x40);
DEFINE_VIA_REGSET(CAPTURE_8233, 0x60);
/* via8233-specific registers */
#define VIA_REG_OFS_PLAYBACK_VOLUME_L 0x02 /* byte */
#define VIA_REG_OFS_PLAYBACK_VOLUME_R 0x03 /* byte */
#define VIA_REG_OFS_MULTPLAY_FORMAT 0x02 /* byte - format and channels */
#define VIA_REG_MULTPLAY_FMT_8BIT 0x00
#define VIA_REG_MULTPLAY_FMT_16BIT 0x80
#define VIA_REG_MULTPLAY_FMT_CH_MASK 0x70 /* # channels << 4 (valid = 1,2,4,6) */
#define VIA_REG_OFS_CAPTURE_FIFO 0x02 /* byte - bit 6 = fifo enable */
#define VIA_REG_CAPTURE_FIFO_ENABLE 0x40
#define VIA_DXS_MAX_VOLUME 31 /* max. volume (attenuation) of reg 0x32/33 */
#define VIA_REG_CAPTURE_CHANNEL 0x63 /* byte - input select */
#define VIA_REG_CAPTURE_CHANNEL_MIC 0x4
#define VIA_REG_CAPTURE_CHANNEL_LINE 0
#define VIA_REG_CAPTURE_SELECT_CODEC 0x03 /* recording source codec (0 = primary) */
#define VIA_TBL_BIT_FLAG 0x40000000
#define VIA_TBL_BIT_EOL 0x80000000
/* pci space */
#define VIA_ACLINK_STAT 0x40
#define VIA_ACLINK_C11_READY 0x20
#define VIA_ACLINK_C10_READY 0x10
#define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
#define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
#define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
#define VIA_ACLINK_CTRL 0x41
#define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
#define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
#define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
#define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
#define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
#define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
#define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
#define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
#define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
VIA_ACLINK_CTRL_RESET|\
VIA_ACLINK_CTRL_PCM|\
VIA_ACLINK_CTRL_VRA)
#define VIA_FUNC_ENABLE 0x42
#define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
#define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
#define VIA_FUNC_RX2C_WRITE 0x20
#define VIA_FUNC_SB_FIFO_EMPTY 0x10
#define VIA_FUNC_ENABLE_GAME 0x08
#define VIA_FUNC_ENABLE_FM 0x04
#define VIA_FUNC_ENABLE_MIDI 0x02
#define VIA_FUNC_ENABLE_SB 0x01
#define VIA_PNP_CONTROL 0x43
#define VIA_FM_NMI_CTRL 0x48
#define VIA8233_VOLCHG_CTRL 0x48
#define VIA8233_SPDIF_CTRL 0x49
#define VIA8233_SPDIF_DX3 0x08
#define VIA8233_SPDIF_SLOT_MASK 0x03
#define VIA8233_SPDIF_SLOT_1011 0x00
#define VIA8233_SPDIF_SLOT_34 0x01
#define VIA8233_SPDIF_SLOT_78 0x02
#define VIA8233_SPDIF_SLOT_69 0x03
/*
*/
#define VIA_DXS_AUTO 0
#define VIA_DXS_ENABLE 1
#define VIA_DXS_DISABLE 2
#define VIA_DXS_48K 3
#define VIA_DXS_NO_VRA 4
#define VIA_DXS_SRC 5
/*
* pcm stream
*/
struct snd_via_sg_table {
unsigned int offset;
unsigned int size;
} ;
#define VIA_TABLE_SIZE 255
#define VIA_MAX_BUFSIZE (1<<24)
struct viadev {
unsigned int reg_offset;
unsigned long port;
int direction; /* playback = 0, capture = 1 */
struct snd_pcm_substream *substream;
int running;
unsigned int tbl_entries; /* # descriptors */
struct snd_dma_buffer table;
struct snd_via_sg_table *idx_table;
/* for recovery from the unexpected pointer */
unsigned int lastpos;
unsigned int fragsize;
unsigned int bufsize;
unsigned int bufsize2;
int hwptr_done; /* processed frame position in the buffer */
int in_interrupt;
int shadow_shift;
};
enum { TYPE_CARD_VIA686 = 1, TYPE_CARD_VIA8233 };
enum { TYPE_VIA686, TYPE_VIA8233, TYPE_VIA8233A };
#define VIA_MAX_DEVS 7 /* 4 playback, 1 multi, 2 capture */
struct via_rate_lock {
spinlock_t lock;
int rate;
int used;
};
struct via82xx {
int irq;
unsigned long port;
struct resource *mpu_res;
int chip_type;
unsigned char revision;
unsigned char old_legacy;
unsigned char old_legacy_cfg;
unsigned char legacy_saved;
unsigned char legacy_cfg_saved;
unsigned char spdif_ctrl_saved;
unsigned char capture_src_saved[2];
unsigned int mpu_port_saved;
unsigned char playback_volume[4][2]; /* for VIA8233/C/8235; default = 0 */
unsigned char playback_volume_c[2]; /* for VIA8233/C/8235; default = 0 */
unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
struct pci_dev *pci;
struct snd_card *card;
unsigned int num_devs;
unsigned int playback_devno, multi_devno, capture_devno;
struct viadev devs[VIA_MAX_DEVS];
struct via_rate_lock rates[2]; /* playback and capture */
unsigned int dxs_fixed: 1; /* DXS channel accepts only 48kHz */
unsigned int no_vra: 1; /* no need to set VRA on DXS channels */
unsigned int dxs_src: 1; /* use full SRC capabilities of DXS */
unsigned int spdif_on: 1; /* only spdif rates work to external DACs */
struct snd_pcm *pcms[2];
struct snd_rawmidi *rmidi;
struct snd_kcontrol *dxs_controls[4];
struct snd_ac97_bus *ac97_bus;
struct snd_ac97 *ac97;
unsigned int ac97_clock;
unsigned int ac97_secondary; /* secondary AC'97 codec is present */
spinlock_t reg_lock;
struct snd_info_entry *proc_entry;
#ifdef SUPPORT_JOYSTICK
struct gameport *gameport;
#endif
};
static const struct pci_device_id snd_via82xx_ids[] = {
/* 0x1106, 0x3058 */
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C686_5), TYPE_CARD_VIA686, }, /* 686A */
/* 0x1106, 0x3059 */
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_8233_5), TYPE_CARD_VIA8233, }, /* VT8233 */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_via82xx_ids);
/*
*/
/*
* allocate and initialize the descriptor buffers
* periods = number of periods
* fragsize = period size in bytes
*/
static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
struct pci_dev *pci,
unsigned int periods, unsigned int fragsize)
{
unsigned int i, idx, ofs, rest;
struct via82xx *chip = snd_pcm_substream_chip(substream);
__le32 *pgtbl;
if (dev->table.area == NULL) {
/* the start of each lists must be aligned to 8 bytes,
* but the kernel pages are much bigger, so we don't care
*/
if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
&dev->table) < 0)
return -ENOMEM;
}
if (! dev->idx_table) {
dev->idx_table = kmalloc_array(VIA_TABLE_SIZE,
sizeof(*dev->idx_table),
GFP_KERNEL);
if (! dev->idx_table)
return -ENOMEM;
}
/* fill the entries */
idx = 0;
ofs = 0;
pgtbl = (__le32 *)dev->table.area;
for (i = 0; i < periods; i++) {
rest = fragsize;
/* fill descriptors for a period.
* a period can be split to several descriptors if it's
* over page boundary.
*/
do {
unsigned int r;
unsigned int flag;
unsigned int addr;
if (idx >= VIA_TABLE_SIZE) {
dev_err(&pci->dev, "too much table size!\n");
return -EINVAL;
}
addr = snd_pcm_sgbuf_get_addr(substream, ofs);
pgtbl[idx << 1] = cpu_to_le32(addr);
r = snd_pcm_sgbuf_get_chunk_size(substream, ofs, rest);
rest -= r;
if (! rest) {
if (i == periods - 1)
flag = VIA_TBL_BIT_EOL; /* buffer boundary */
else
flag = VIA_TBL_BIT_FLAG; /* period boundary */
} else
flag = 0; /* period continues to the next */
/*
dev_dbg(&pci->dev,
"tbl %d: at %d size %d (rest %d)\n",
idx, ofs, r, rest);
*/
pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag);
dev->idx_table[idx].offset = ofs;
dev->idx_table[idx].size = r;
ofs += r;
idx++;
} while (rest > 0);
}
dev->tbl_entries = idx;
dev->bufsize = periods * fragsize;
dev->bufsize2 = dev->bufsize / 2;
dev->fragsize = fragsize;
return 0;
}
static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
struct pci_dev *pci)
{
if (dev->table.area) {
snd_dma_free_pages(&dev->table);
dev->table.area = NULL;
}
kfree(dev->idx_table);
dev->idx_table = NULL;
return 0;
}
/*
* Basic I/O
*/
static inline unsigned int snd_via82xx_codec_xread(struct via82xx *chip)
{
return inl(VIAREG(chip, AC97));
}
static inline void snd_via82xx_codec_xwrite(struct via82xx *chip, unsigned int val)
{
outl(val, VIAREG(chip, AC97));
}
static int snd_via82xx_codec_ready(struct via82xx *chip, int secondary)
{
unsigned int timeout = 1000; /* 1ms */
unsigned int val;
while (timeout-- > 0) {
udelay(1);
val = snd_via82xx_codec_xread(chip);
if (!(val & VIA_REG_AC97_BUSY))
return val & 0xffff;
}
dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
secondary, snd_via82xx_codec_xread(chip));
return -EIO;
}
static int snd_via82xx_codec_valid(struct via82xx *chip, int secondary)
{
unsigned int timeout = 1000; /* 1ms */
unsigned int val, val1;
unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
VIA_REG_AC97_SECONDARY_VALID;
while (timeout-- > 0) {
val = snd_via82xx_codec_xread(chip);
val1 = val & (VIA_REG_AC97_BUSY | stat);
if (val1 == stat)
return val & 0xffff;
udelay(1);
}
return -EIO;
}
static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
{
struct via82xx *chip = ac97->private_data;
__always_unused int err;
err = snd_via82xx_codec_ready(chip, ac97->num);
/* here we need to wait fairly for long time.. */
if (!nodelay)
msleep(500);
}
static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
unsigned short reg,
unsigned short val)
{
struct via82xx *chip = ac97->private_data;
unsigned int xval;
xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
xval |= reg << VIA_REG_AC97_CMD_SHIFT;
xval |= val << VIA_REG_AC97_DATA_SHIFT;
snd_via82xx_codec_xwrite(chip, xval);
snd_via82xx_codec_ready(chip, ac97->num);
}
static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
{
struct via82xx *chip = ac97->private_data;
unsigned int xval, val = 0xffff;
int again = 0;
xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
xval |= VIA_REG_AC97_READ;
xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
while (1) {
if (again++ > 3) {
dev_err(chip->card->dev,
"codec_read: codec %i is not valid [0x%x]\n",
ac97->num, snd_via82xx_codec_xread(chip));
return 0xffff;
}
snd_via82xx_codec_xwrite(chip, xval);
udelay (20);
if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
udelay(25);
val = snd_via82xx_codec_xread(chip);
break;
}
}
return val & 0xffff;
}
static void snd_via82xx_channel_reset(struct via82xx *chip, struct viadev *viadev)
{
outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
VIADEV_REG(viadev, OFFSET_CONTROL));
inb(VIADEV_REG(viadev, OFFSET_CONTROL));
udelay(50);
/* disable interrupts */
outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
/* clear interrupts */
outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
// outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
viadev->lastpos = 0;
viadev->hwptr_done = 0;
}
/*
* Interrupt handler
* Used for 686 and 8233A
*/
static irqreturn_t snd_via686_interrupt(int irq, void *dev_id)
{
struct via82xx *chip = dev_id;
unsigned int status;
unsigned int i;
status = inl(VIAREG(chip, SGD_SHADOW));
if (! (status & chip->intr_mask)) {
if (chip->rmidi)
/* check mpu401 interrupt */
return snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
return IRQ_NONE;
}
/* check status for each stream */
spin_lock(&chip->reg_lock);
for (i = 0; i < chip->num_devs; i++) {
struct viadev *viadev = &chip->devs[i];
unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
if (! (c_status & (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED)))
continue;
if (viadev->substream && viadev->running) {
/*
* Update hwptr_done based on 'period elapsed'
* interrupts. We'll use it, when the chip returns 0
* for OFFSET_CURR_COUNT.
*/
if (c_status & VIA_REG_STAT_EOL)
viadev->hwptr_done = 0;
else
viadev->hwptr_done += viadev->fragsize;
viadev->in_interrupt = c_status;
spin_unlock(&chip->reg_lock);
snd_pcm_period_elapsed(viadev->substream);
spin_lock(&chip->reg_lock);
viadev->in_interrupt = 0;
}
outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
}
spin_unlock(&chip->reg_lock);
return IRQ_HANDLED;
}
/*
* Interrupt handler
*/
static irqreturn_t snd_via8233_interrupt(int irq, void *dev_id)
{
struct via82xx *chip = dev_id;
unsigned int status;
unsigned int i;
int irqreturn = 0;
/* check status for each stream */
spin_lock(&chip->reg_lock);
status = inl(VIAREG(chip, SGD_SHADOW));
for (i = 0; i < chip->num_devs; i++) {
struct viadev *viadev = &chip->devs[i];
struct snd_pcm_substream *substream;
unsigned char c_status, shadow_status;
shadow_status = (status >> viadev->shadow_shift) &
(VIA8233_SHADOW_STAT_ACTIVE|VIA_REG_STAT_EOL|
VIA_REG_STAT_FLAG);
c_status = shadow_status & (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG);
if (!c_status)
continue;
substream = viadev->substream;
if (substream && viadev->running) {
/*
* Update hwptr_done based on 'period elapsed'
* interrupts. We'll use it, when the chip returns 0
* for OFFSET_CURR_COUNT.
*/
if (c_status & VIA_REG_STAT_EOL)
viadev->hwptr_done = 0;
else
viadev->hwptr_done += viadev->fragsize;
viadev->in_interrupt = c_status;
if (shadow_status & VIA8233_SHADOW_STAT_ACTIVE)
viadev->in_interrupt |= VIA_REG_STAT_ACTIVE;
spin_unlock(&chip->reg_lock);
snd_pcm_period_elapsed(substream);
spin_lock(&chip->reg_lock);
viadev->in_interrupt = 0;
}
outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
irqreturn = 1;
}
spin_unlock(&chip->reg_lock);
return IRQ_RETVAL(irqreturn);
}
/*
* PCM callbacks
*/
/*
* trigger callback
*/
static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
unsigned char val;
if (chip->chip_type != TYPE_VIA686)
val = VIA_REG_CTRL_INT;
else
val = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
val |= VIA_REG_CTRL_START;
viadev->running = 1;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
val = VIA_REG_CTRL_TERMINATE;
viadev->running = 0;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
val |= VIA_REG_CTRL_PAUSE;
viadev->running = 0;
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
viadev->running = 1;
break;
default:
return -EINVAL;
}
outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
if (cmd == SNDRV_PCM_TRIGGER_STOP)
snd_via82xx_channel_reset(chip, viadev);
return 0;
}
/*
* pointer callbacks
*/
/*
* calculate the linear position at the given sg-buffer index and the rest count
*/
#define check_invalid_pos(viadev,pos) \
((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
viadev->lastpos < viadev->bufsize2))
static inline unsigned int calc_linear_pos(struct via82xx *chip,
struct viadev *viadev,
unsigned int idx,
unsigned int count)
{
unsigned int size, base, res;
size = viadev->idx_table[idx].size;
base = viadev->idx_table[idx].offset;
res = base + size - count;
if (res >= viadev->bufsize)
res -= viadev->bufsize;
/* check the validity of the calculated position */
if (size < count) {
dev_dbg(chip->card->dev,
"invalid via82xx_cur_ptr (size = %d, count = %d)\n",
(int)size, (int)count);
res = viadev->lastpos;
} else {
if (! count) {
/* Some mobos report count = 0 on the DMA boundary,
* i.e. count = size indeed.
* Let's check whether this step is above the expected size.
*/
int delta = res - viadev->lastpos;
if (delta < 0)
delta += viadev->bufsize;
if ((unsigned int)delta > viadev->fragsize)
res = base;
}
if (check_invalid_pos(viadev, res)) {
#ifdef POINTER_DEBUG
dev_dbg(chip->card->dev,
"fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
idx, viadev->tbl_entries,
viadev->lastpos, viadev->bufsize2,
viadev->idx_table[idx].offset,
viadev->idx_table[idx].size, count);
#endif
/* count register returns full size when end of buffer is reached */
res = base + size;
if (check_invalid_pos(viadev, res)) {
dev_dbg(chip->card->dev,
"invalid via82xx_cur_ptr (2), using last valid pointer\n");
res = viadev->lastpos;
}
}
}
return res;
}
/*
* get the current pointer on via686
*/
static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
unsigned int idx, ptr, count, res;
if (snd_BUG_ON(!viadev->tbl_entries))
return 0;
if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
return 0;
spin_lock(&chip->reg_lock);
count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
/* The via686a does not have the current index register,
* so we need to calculate the index from CURR_PTR.
*/
ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
if (ptr <= (unsigned int)viadev->table.addr)
idx = 0;
else /* CURR_PTR holds the address + 8 */
idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
res = calc_linear_pos(chip, viadev, idx, count);
viadev->lastpos = res; /* remember the last position */
spin_unlock(&chip->reg_lock);
return bytes_to_frames(substream->runtime, res);
}
/*
* get the current pointer on via823x
*/
static snd_pcm_uframes_t snd_via8233_pcm_pointer(struct snd_pcm_substream *substream)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
unsigned int idx, count, res;
int status;
if (snd_BUG_ON(!viadev->tbl_entries))
return 0;
spin_lock(&chip->reg_lock);
count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT));
status = viadev->in_interrupt;
if (!status)
status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
/* An apparent bug in the 8251 is worked around by sending a
* REG_CTRL_START. */
if (chip->revision == VIA_REV_8251 && (status & VIA_REG_STAT_EOL))
snd_via82xx_pcm_trigger(substream, SNDRV_PCM_TRIGGER_START);
if (!(status & VIA_REG_STAT_ACTIVE)) {
res = 0;
goto unlock;
}
if (count & 0xffffff) {
idx = count >> 24;
if (idx >= viadev->tbl_entries) {
#ifdef POINTER_DEBUG
dev_dbg(chip->card->dev,
"fail: invalid idx = %i/%i\n", idx,
viadev->tbl_entries);
#endif
res = viadev->lastpos;
} else {
count &= 0xffffff;
res = calc_linear_pos(chip, viadev, idx, count);
}
} else {
res = viadev->hwptr_done;
if (!viadev->in_interrupt) {
if (status & VIA_REG_STAT_EOL) {
res = 0;
} else
if (status & VIA_REG_STAT_FLAG) {
res += viadev->fragsize;
}
}
}
unlock:
viadev->lastpos = res;
spin_unlock(&chip->reg_lock);
return bytes_to_frames(substream->runtime, res);
}
/*
* hw_params callback:
* allocate the buffer and build up the buffer description table
*/
static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
return build_via_table(viadev, substream, chip->pci,
params_periods(hw_params),
params_period_bytes(hw_params));
}
/*
* hw_free callback:
* clean up the buffer description table and release the buffer
*/
static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
clean_via_table(viadev, substream, chip->pci);
return 0;
}
/*
* set up the table pointer
*/
static void snd_via82xx_set_table_ptr(struct via82xx *chip, struct viadev *viadev)
{
snd_via82xx_codec_ready(chip, 0);
outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
udelay(20);
snd_via82xx_codec_ready(chip, 0);
}
/*
* prepare callback for playback and capture on via686
*/
static void via686_setup_format(struct via82xx *chip, struct viadev *viadev,
struct snd_pcm_runtime *runtime)
{
snd_via82xx_channel_reset(chip, viadev);
/* this must be set after channel_reset */
snd_via82xx_set_table_ptr(chip, viadev);
outb(VIA_REG_TYPE_AUTOSTART |
(runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA_REG_TYPE_16BIT : 0) |
(runtime->channels > 1 ? VIA_REG_TYPE_STEREO : 0) |
((viadev->reg_offset & 0x10) == 0 ? VIA_REG_TYPE_INT_LSAMPLE : 0) |
VIA_REG_TYPE_INT_EOL |
VIA_REG_TYPE_INT_FLAG, VIADEV_REG(viadev, OFFSET_TYPE));
}
static int snd_via686_playback_prepare(struct snd_pcm_substream *substream)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
via686_setup_format(chip, viadev, runtime);
return 0;
}
static int snd_via686_capture_prepare(struct snd_pcm_substream *substream)
{
struct via82xx *chip = snd_pcm_substream_chip(substream);
struct viadev *viadev = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
via686_setup_format(chip, viadev, runtime);
return 0;
}
/*
* lock the current rate
*/
static int via_lock_rate(struct via_rate_lock *rec, int rate)
{
int changed = 0;
spin_lock_irq(&rec->lock);