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atiixp.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA driver for ATI IXP 150/200/250/300 AC97 controllers
*
* Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
*/
#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/module.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("ATI IXP AC97 controller");
MODULE_LICENSE("GPL");
static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
static int ac97_clock = 48000;
static char *ac97_quirk;
static bool spdif_aclink = 1;
static int ac97_codec = -1;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
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(ac97_codec, int, 0444);
MODULE_PARM_DESC(ac97_codec, "Specify codec instead of probing.");
module_param(spdif_aclink, bool, 0444);
MODULE_PARM_DESC(spdif_aclink, "S/PDIF over AC-link.");
/* just for backward compatibility */
static bool enable;
module_param(enable, bool, 0444);
/*
*/
#define ATI_REG_ISR 0x00 /* interrupt source */
#define ATI_REG_ISR_IN_XRUN (1U<<0)
#define ATI_REG_ISR_IN_STATUS (1U<<1)
#define ATI_REG_ISR_OUT_XRUN (1U<<2)
#define ATI_REG_ISR_OUT_STATUS (1U<<3)
#define ATI_REG_ISR_SPDF_XRUN (1U<<4)
#define ATI_REG_ISR_SPDF_STATUS (1U<<5)
#define ATI_REG_ISR_PHYS_INTR (1U<<8)
#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
#define ATI_REG_ISR_NEW_FRAME (1U<<13)
#define ATI_REG_IER 0x04 /* interrupt enable */
#define ATI_REG_IER_IN_XRUN_EN (1U<<0)
#define ATI_REG_IER_IO_STATUS_EN (1U<<1)
#define ATI_REG_IER_OUT_XRUN_EN (1U<<2)
#define ATI_REG_IER_OUT_XRUN_COND (1U<<3)
#define ATI_REG_IER_SPDF_XRUN_EN (1U<<4)
#define ATI_REG_IER_SPDF_STATUS_EN (1U<<5)
#define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
#define ATI_REG_IER_SET_BUS_BUSY (1U<<14) /* (WO) audio is running */
#define ATI_REG_CMD 0x08 /* command */
#define ATI_REG_CMD_POWERDOWN (1U<<0)
#define ATI_REG_CMD_RECEIVE_EN (1U<<1)
#define ATI_REG_CMD_SEND_EN (1U<<2)
#define ATI_REG_CMD_STATUS_MEM (1U<<3)
#define ATI_REG_CMD_SPDF_OUT_EN (1U<<4)
#define ATI_REG_CMD_SPDF_STATUS_MEM (1U<<5)
#define ATI_REG_CMD_SPDF_THRESHOLD (3U<<6)
#define ATI_REG_CMD_SPDF_THRESHOLD_SHIFT 6
#define ATI_REG_CMD_IN_DMA_EN (1U<<8)
#define ATI_REG_CMD_OUT_DMA_EN (1U<<9)
#define ATI_REG_CMD_SPDF_DMA_EN (1U<<10)
#define ATI_REG_CMD_SPDF_OUT_STOPPED (1U<<11)
#define ATI_REG_CMD_SPDF_CONFIG_MASK (7U<<12)
#define ATI_REG_CMD_SPDF_CONFIG_34 (1U<<12)
#define ATI_REG_CMD_SPDF_CONFIG_78 (2U<<12)
#define ATI_REG_CMD_SPDF_CONFIG_69 (3U<<12)
#define ATI_REG_CMD_SPDF_CONFIG_01 (4U<<12)
#define ATI_REG_CMD_INTERLEAVE_SPDF (1U<<16)
#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
#define ATI_REG_CMD_INTERLEAVE_IN (1U<<21)
#define ATI_REG_CMD_INTERLEAVE_OUT (1U<<22)
#define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
#define ATI_REG_CMD_PACKED_DIS (1U<<24)
#define ATI_REG_CMD_BURST_EN (1U<<25)
#define ATI_REG_CMD_PANIC_EN (1U<<26)
#define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
#define ATI_REG_CMD_AC_SYNC (1U<<30)
#define ATI_REG_CMD_AC_RESET (1U<<31)
#define ATI_REG_PHYS_OUT_ADDR 0x0c
#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
#define ATI_REG_PHYS_OUT_RW (1U<<2)
#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
#define ATI_REG_PHYS_OUT_DATA_SHIFT 16
#define ATI_REG_PHYS_IN_ADDR 0x10
#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
#define ATI_REG_PHYS_IN_ADDR_SHIFT 9
#define ATI_REG_PHYS_IN_DATA_SHIFT 16
#define ATI_REG_SLOTREQ 0x14
#define ATI_REG_COUNTER 0x18
#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
#define ATI_REG_COUNTER_BITCLOCK (31U<<8)
#define ATI_REG_IN_FIFO_THRESHOLD 0x1c
#define ATI_REG_IN_DMA_LINKPTR 0x20
#define ATI_REG_IN_DMA_DT_START 0x24 /* RO */
#define ATI_REG_IN_DMA_DT_NEXT 0x28 /* RO */
#define ATI_REG_IN_DMA_DT_CUR 0x2c /* RO */
#define ATI_REG_IN_DMA_DT_SIZE 0x30
#define ATI_REG_OUT_DMA_SLOT 0x34
#define ATI_REG_OUT_DMA_SLOT_BIT(x) (1U << ((x) - 3))
#define ATI_REG_OUT_DMA_SLOT_MASK 0x1ff
#define ATI_REG_OUT_DMA_THRESHOLD_MASK 0xf800
#define ATI_REG_OUT_DMA_THRESHOLD_SHIFT 11
#define ATI_REG_OUT_DMA_LINKPTR 0x38
#define ATI_REG_OUT_DMA_DT_START 0x3c /* RO */
#define ATI_REG_OUT_DMA_DT_NEXT 0x40 /* RO */
#define ATI_REG_OUT_DMA_DT_CUR 0x44 /* RO */
#define ATI_REG_OUT_DMA_DT_SIZE 0x48
#define ATI_REG_SPDF_CMD 0x4c
#define ATI_REG_SPDF_CMD_LFSR (1U<<4)
#define ATI_REG_SPDF_CMD_SINGLE_CH (1U<<5)
#define ATI_REG_SPDF_CMD_LFSR_ACC (0xff<<8) /* RO */
#define ATI_REG_SPDF_DMA_LINKPTR 0x50
#define ATI_REG_SPDF_DMA_DT_START 0x54 /* RO */
#define ATI_REG_SPDF_DMA_DT_NEXT 0x58 /* RO */
#define ATI_REG_SPDF_DMA_DT_CUR 0x5c /* RO */
#define ATI_REG_SPDF_DMA_DT_SIZE 0x60
#define ATI_REG_MODEM_MIRROR 0x7c
#define ATI_REG_AUDIO_MIRROR 0x80
#define ATI_REG_6CH_REORDER 0x84 /* reorder slots for 6ch */
#define ATI_REG_6CH_REORDER_EN (1U<<0) /* 3,4,7,8,6,9 -> 3,4,6,9,7,8 */
#define ATI_REG_FIFO_FLUSH 0x88
#define ATI_REG_FIFO_OUT_FLUSH (1U<<0)
#define ATI_REG_FIFO_IN_FLUSH (1U<<1)
/* LINKPTR */
#define ATI_REG_LINKPTR_EN (1U<<0)
/* [INT|OUT|SPDIF]_DMA_DT_SIZE */
#define ATI_REG_DMA_DT_SIZE (0xffffU<<0)
#define ATI_REG_DMA_FIFO_USED (0x1fU<<16)
#define ATI_REG_DMA_FIFO_FREE (0x1fU<<21)
#define ATI_REG_DMA_STATE (7U<<26)
#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
struct atiixp;
/*
* DMA packate descriptor
*/
struct atiixp_dma_desc {
__le32 addr; /* DMA buffer address */
u16 status; /* status bits */
u16 size; /* size of the packet in dwords */
__le32 next; /* address of the next packet descriptor */
};
/*
* stream enum
*/
enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, ATI_DMA_SPDIF, NUM_ATI_DMAS }; /* DMAs */
enum { ATI_PCM_OUT, ATI_PCM_IN, ATI_PCM_SPDIF, NUM_ATI_PCMS }; /* AC97 pcm slots */
enum { ATI_PCMDEV_ANALOG, ATI_PCMDEV_DIGITAL, NUM_ATI_PCMDEVS }; /* pcm devices */
#define NUM_ATI_CODECS 3
/*
* constants and callbacks for each DMA type
*/
struct atiixp_dma_ops {
int type; /* ATI_DMA_XXX */
unsigned int llp_offset; /* LINKPTR offset */
unsigned int dt_cur; /* DT_CUR offset */
/* called from open callback */
void (*enable_dma)(struct atiixp *chip, int on);
/* called from trigger (START/STOP) */
void (*enable_transfer)(struct atiixp *chip, int on);
/* called from trigger (STOP only) */
void (*flush_dma)(struct atiixp *chip);
};
/*
* DMA stream
*/
struct atiixp_dma {
const struct atiixp_dma_ops *ops;
struct snd_dma_buffer desc_buf;
struct snd_pcm_substream *substream; /* assigned PCM substream */
unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
unsigned int period_bytes, periods;
int opened;
int running;
int suspended;
int pcm_open_flag;
int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
unsigned int saved_curptr;
};
/*
* ATI IXP chip
*/
struct atiixp {
struct snd_card *card;
struct pci_dev *pci;
unsigned long addr;
void __iomem *remap_addr;
int irq;
struct snd_ac97_bus *ac97_bus;
struct snd_ac97 *ac97[NUM_ATI_CODECS];
spinlock_t reg_lock;
struct atiixp_dma dmas[NUM_ATI_DMAS];
struct ac97_pcm *pcms[NUM_ATI_PCMS];
struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
int max_channels; /* max. channels for PCM out */
unsigned int codec_not_ready_bits; /* for codec detection */
int spdif_over_aclink; /* passed from the module option */
struct mutex open_mutex; /* playback open mutex */
};
/*
*/
static const struct pci_device_id snd_atiixp_ids[] = {
{ PCI_VDEVICE(ATI, 0x4341), 0 }, /* SB200 */
{ PCI_VDEVICE(ATI, 0x4361), 0 }, /* SB300 */
{ PCI_VDEVICE(ATI, 0x4370), 0 }, /* SB400 */
{ PCI_VDEVICE(ATI, 0x4382), 0 }, /* SB600 */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
static const struct snd_pci_quirk atiixp_quirks[] = {
SND_PCI_QUIRK(0x105b, 0x0c81, "Foxconn RC4107MA-RS2", 0),
SND_PCI_QUIRK(0x15bd, 0x3100, "DFI RS482", 0),
{ } /* terminator */
};
/*
* lowlevel functions
*/
/*
* update the bits of the given register.
* return 1 if the bits changed.
*/
static int snd_atiixp_update_bits(struct atiixp *chip, unsigned int reg,
unsigned int mask, unsigned int value)
{
void __iomem *addr = chip->remap_addr + reg;
unsigned int data, old_data;
old_data = data = readl(addr);
data &= ~mask;
data |= value;
if (old_data == data)
return 0;
writel(data, addr);
return 1;
}
/*
* macros for easy use
*/
#define atiixp_write(chip,reg,value) \
writel(value, chip->remap_addr + ATI_REG_##reg)
#define atiixp_read(chip,reg) \
readl(chip->remap_addr + ATI_REG_##reg)
#define atiixp_update(chip,reg,mask,val) \
snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
/*
* handling DMA packets
*
* we allocate a linear buffer for the DMA, and split it to each packet.
* in a future version, a scatter-gather buffer should be implemented.
*/
#define ATI_DESC_LIST_SIZE \
PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
/*
* build packets ring for the given buffer size.
*
* IXP handles the buffer descriptors, which are connected as a linked
* list. although we can change the list dynamically, in this version,
* a static RING of buffer descriptors is used.
*
* the ring is built in this function, and is set up to the hardware.
*/
static int atiixp_build_dma_packets(struct atiixp *chip, struct atiixp_dma *dma,
struct snd_pcm_substream *substream,
unsigned int periods,
unsigned int period_bytes)
{
unsigned int i;
u32 addr, desc_addr;
unsigned long flags;
if (periods > ATI_MAX_DESCRIPTORS)
return -ENOMEM;
if (dma->desc_buf.area == NULL) {
if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
&chip->pci->dev,
ATI_DESC_LIST_SIZE,
&dma->desc_buf) < 0)
return -ENOMEM;
dma->period_bytes = dma->periods = 0; /* clear */
}
if (dma->periods == periods && dma->period_bytes == period_bytes)
return 0;
/* reset DMA before changing the descriptor table */
spin_lock_irqsave(&chip->reg_lock, flags);
writel(0, chip->remap_addr + dma->ops->llp_offset);
dma->ops->enable_dma(chip, 0);
dma->ops->enable_dma(chip, 1);
spin_unlock_irqrestore(&chip->reg_lock, flags);
/* fill the entries */
addr = (u32)substream->runtime->dma_addr;
desc_addr = (u32)dma->desc_buf.addr;
for (i = 0; i < periods; i++) {
struct atiixp_dma_desc *desc;
desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
desc->addr = cpu_to_le32(addr);
desc->status = 0;
desc->size = period_bytes >> 2; /* in dwords */
desc_addr += sizeof(struct atiixp_dma_desc);
if (i == periods - 1)
desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
else
desc->next = cpu_to_le32(desc_addr);
addr += period_bytes;
}
writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
chip->remap_addr + dma->ops->llp_offset);
dma->period_bytes = period_bytes;
dma->periods = periods;
return 0;
}
/*
* remove the ring buffer and release it if assigned
*/
static void atiixp_clear_dma_packets(struct atiixp *chip, struct atiixp_dma *dma,
struct snd_pcm_substream *substream)
{
if (dma->desc_buf.area) {
writel(0, chip->remap_addr + dma->ops->llp_offset);
snd_dma_free_pages(&dma->desc_buf);
dma->desc_buf.area = NULL;
}
}
/*
* AC97 interface
*/
static int snd_atiixp_acquire_codec(struct atiixp *chip)
{
int timeout = 1000;
while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
if (! timeout--) {
dev_warn(chip->card->dev, "codec acquire timeout\n");
return -EBUSY;
}
udelay(1);
}
return 0;
}
static unsigned short snd_atiixp_codec_read(struct atiixp *chip, unsigned short codec, unsigned short reg)
{
unsigned int data;
int timeout;
if (snd_atiixp_acquire_codec(chip) < 0)
return 0xffff;
data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
ATI_REG_PHYS_OUT_ADDR_EN |
ATI_REG_PHYS_OUT_RW |
codec;
atiixp_write(chip, PHYS_OUT_ADDR, data);
if (snd_atiixp_acquire_codec(chip) < 0)
return 0xffff;
timeout = 1000;
do {
data = atiixp_read(chip, PHYS_IN_ADDR);
if (data & ATI_REG_PHYS_IN_READ_FLAG)
return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
udelay(1);
} while (--timeout);
/* time out may happen during reset */
if (reg < 0x7c)
dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
return 0xffff;
}
static void snd_atiixp_codec_write(struct atiixp *chip, unsigned short codec,
unsigned short reg, unsigned short val)
{
unsigned int data;
if (snd_atiixp_acquire_codec(chip) < 0)
return;
data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
ATI_REG_PHYS_OUT_ADDR_EN | codec;
atiixp_write(chip, PHYS_OUT_ADDR, data);
}
static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
struct atiixp *chip = ac97->private_data;
return snd_atiixp_codec_read(chip, ac97->num, reg);
}
static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
struct atiixp *chip = ac97->private_data;
snd_atiixp_codec_write(chip, ac97->num, reg, val);
}
/*
* reset AC link
*/
static int snd_atiixp_aclink_reset(struct atiixp *chip)
{
int timeout;
/* reset powerdoewn */
if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
udelay(10);
/* perform a software reset */
atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
atiixp_read(chip, CMD);
udelay(10);
atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
timeout = 10;
while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
/* do a hard reset */
atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
ATI_REG_CMD_AC_SYNC);
atiixp_read(chip, CMD);
mdelay(1);
atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
if (!--timeout) {
dev_err(chip->card->dev, "codec reset timeout\n");
break;
}
}
/* deassert RESET and assert SYNC to make sure */
atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
return 0;
}
static int snd_atiixp_aclink_down(struct atiixp *chip)
{
// if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
// return -EBUSY;
atiixp_update(chip, CMD,
ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
ATI_REG_CMD_POWERDOWN);
return 0;
}
/*
* auto-detection of codecs
*
* the IXP chip can generate interrupts for the non-existing codecs.
* NEW_FRAME interrupt is used to make sure that the interrupt is generated
* even if all three codecs are connected.
*/
#define ALL_CODEC_NOT_READY \
(ATI_REG_ISR_CODEC0_NOT_READY |\
ATI_REG_ISR_CODEC1_NOT_READY |\
ATI_REG_ISR_CODEC2_NOT_READY)
#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
static int ac97_probing_bugs(struct pci_dev *pci)
{
const struct snd_pci_quirk *q;
q = snd_pci_quirk_lookup(pci, atiixp_quirks);
if (q) {
dev_dbg(&pci->dev, "atiixp quirk for %s. Forcing codec %d\n",
snd_pci_quirk_name(q), q->value);
return q->value;
}
/* this hardware doesn't need workarounds. Probe for codec */
return -1;
}
static int snd_atiixp_codec_detect(struct atiixp *chip)
{
int timeout;
chip->codec_not_ready_bits = 0;
if (ac97_codec == -1)
ac97_codec = ac97_probing_bugs(chip->pci);
if (ac97_codec >= 0) {
chip->codec_not_ready_bits |=
CODEC_CHECK_BITS ^ (1 << (ac97_codec + 10));
return 0;
}
atiixp_write(chip, IER, CODEC_CHECK_BITS);
/* wait for the interrupts */
timeout = 50;
while (timeout-- > 0) {
mdelay(1);
if (chip->codec_not_ready_bits)
break;
}
atiixp_write(chip, IER, 0); /* disable irqs */
if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
dev_err(chip->card->dev, "no codec detected!\n");
return -ENXIO;
}
return 0;
}
/*
* enable DMA and irqs
*/
static int snd_atiixp_chip_start(struct atiixp *chip)
{
unsigned int reg;
/* set up spdif, enable burst mode */
reg = atiixp_read(chip, CMD);
reg |= 0x02 << ATI_REG_CMD_SPDF_THRESHOLD_SHIFT;
reg |= ATI_REG_CMD_BURST_EN;
atiixp_write(chip, CMD, reg);
reg = atiixp_read(chip, SPDF_CMD);
reg &= ~(ATI_REG_SPDF_CMD_LFSR|ATI_REG_SPDF_CMD_SINGLE_CH);
atiixp_write(chip, SPDF_CMD, reg);
/* clear all interrupt source */
atiixp_write(chip, ISR, 0xffffffff);
/* enable irqs */
atiixp_write(chip, IER,
ATI_REG_IER_IO_STATUS_EN |
ATI_REG_IER_IN_XRUN_EN |
ATI_REG_IER_OUT_XRUN_EN |
ATI_REG_IER_SPDF_XRUN_EN |
ATI_REG_IER_SPDF_STATUS_EN);
return 0;
}
/*
* disable DMA and IRQs
*/
static int snd_atiixp_chip_stop(struct atiixp *chip)
{
/* clear interrupt source */
atiixp_write(chip, ISR, atiixp_read(chip, ISR));
/* disable irqs */
atiixp_write(chip, IER, 0);
return 0;
}
/*
* PCM section
*/
/*
* pointer callback simplly reads XXX_DMA_DT_CUR register as the current
* position. when SG-buffer is implemented, the offset must be calculated
* correctly...
*/
static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct atiixp_dma *dma = runtime->private_data;
unsigned int curptr;
int timeout = 1000;
while (timeout--) {
curptr = readl(chip->remap_addr + dma->ops->dt_cur);
if (curptr < dma->buf_addr)
continue;
curptr -= dma->buf_addr;
if (curptr >= dma->buf_bytes)
continue;
return bytes_to_frames(runtime, curptr);
}
dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
return 0;
}
/*
* XRUN detected, and stop the PCM substream
*/
static void snd_atiixp_xrun_dma(struct atiixp *chip, struct atiixp_dma *dma)
{
if (! dma->substream || ! dma->running)
return;
dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
snd_pcm_stop_xrun(dma->substream);
}
/*
* the period ack. update the substream.
*/
static void snd_atiixp_update_dma(struct atiixp *chip, struct atiixp_dma *dma)
{
if (! dma->substream || ! dma->running)
return;
snd_pcm_period_elapsed(dma->substream);
}
/* set BUS_BUSY interrupt bit if any DMA is running */
/* call with spinlock held */
static void snd_atiixp_check_bus_busy(struct atiixp *chip)
{
unsigned int bus_busy;
if (atiixp_read(chip, CMD) & (ATI_REG_CMD_SEND_EN |
ATI_REG_CMD_RECEIVE_EN |
ATI_REG_CMD_SPDF_OUT_EN))
bus_busy = ATI_REG_IER_SET_BUS_BUSY;
else
bus_busy = 0;
atiixp_update(chip, IER, ATI_REG_IER_SET_BUS_BUSY, bus_busy);
}
/* common trigger callback
* calling the lowlevel callbacks in it
*/
static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
struct atiixp_dma *dma = substream->runtime->private_data;
int err = 0;
if (snd_BUG_ON(!dma->ops->enable_transfer ||
!dma->ops->flush_dma))
return -EINVAL;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
if (dma->running && dma->suspended &&
cmd == SNDRV_PCM_TRIGGER_RESUME)
writel(dma->saved_curptr, chip->remap_addr +
dma->ops->dt_cur);
dma->ops->enable_transfer(chip, 1);
dma->running = 1;
dma->suspended = 0;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
dma->suspended = cmd == SNDRV_PCM_TRIGGER_SUSPEND;
if (dma->running && dma->suspended)
dma->saved_curptr = readl(chip->remap_addr +
dma->ops->dt_cur);
dma->ops->enable_transfer(chip, 0);
dma->running = 0;
break;
default:
err = -EINVAL;
break;
}
if (! err) {
snd_atiixp_check_bus_busy(chip);
if (cmd == SNDRV_PCM_TRIGGER_STOP) {
dma->ops->flush_dma(chip);
snd_atiixp_check_bus_busy(chip);
}
}
spin_unlock(&chip->reg_lock);
return err;
}
/*
* lowlevel callbacks for each DMA type
*
* every callback is supposed to be called in chip->reg_lock spinlock
*/
/* flush FIFO of analog OUT DMA */
static void atiixp_out_flush_dma(struct atiixp *chip)
{
atiixp_write(chip, FIFO_FLUSH, ATI_REG_FIFO_OUT_FLUSH);
}
/* enable/disable analog OUT DMA */
static void atiixp_out_enable_dma(struct atiixp *chip, int on)
{
unsigned int data;
data = atiixp_read(chip, CMD);
if (on) {
if (data & ATI_REG_CMD_OUT_DMA_EN)
return;
atiixp_out_flush_dma(chip);
data |= ATI_REG_CMD_OUT_DMA_EN;
} else
data &= ~ATI_REG_CMD_OUT_DMA_EN;
atiixp_write(chip, CMD, data);
}
/* start/stop transfer over OUT DMA */
static void atiixp_out_enable_transfer(struct atiixp *chip, int on)
{
atiixp_update(chip, CMD, ATI_REG_CMD_SEND_EN,
on ? ATI_REG_CMD_SEND_EN : 0);
}
/* enable/disable analog IN DMA */
static void atiixp_in_enable_dma(struct atiixp *chip, int on)
{
atiixp_update(chip, CMD, ATI_REG_CMD_IN_DMA_EN,
on ? ATI_REG_CMD_IN_DMA_EN : 0);
}
/* start/stop analog IN DMA */
static void atiixp_in_enable_transfer(struct atiixp *chip, int on)
{
if (on) {
unsigned int data = atiixp_read(chip, CMD);
if (! (data & ATI_REG_CMD_RECEIVE_EN)) {
data |= ATI_REG_CMD_RECEIVE_EN;
#if 0 /* FIXME: this causes the endless loop */
/* wait until slot 3/4 are finished */
while ((atiixp_read(chip, COUNTER) &
ATI_REG_COUNTER_SLOT) != 5)
;
#endif
atiixp_write(chip, CMD, data);
}
} else
atiixp_update(chip, CMD, ATI_REG_CMD_RECEIVE_EN, 0);
}
/* flush FIFO of analog IN DMA */
static void atiixp_in_flush_dma(struct atiixp *chip)
{
atiixp_write(chip, FIFO_FLUSH, ATI_REG_FIFO_IN_FLUSH);
}
/* enable/disable SPDIF OUT DMA */
static void atiixp_spdif_enable_dma(struct atiixp *chip, int on)
{
atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_DMA_EN,
on ? ATI_REG_CMD_SPDF_DMA_EN : 0);
}
/* start/stop SPDIF OUT DMA */
static void atiixp_spdif_enable_transfer(struct atiixp *chip, int on)
{
unsigned int data;
data = atiixp_read(chip, CMD);
if (on)
data |= ATI_REG_CMD_SPDF_OUT_EN;
else
data &= ~ATI_REG_CMD_SPDF_OUT_EN;
atiixp_write(chip, CMD, data);
}
/* flush FIFO of SPDIF OUT DMA */
static void atiixp_spdif_flush_dma(struct atiixp *chip)
{
int timeout;
/* DMA off, transfer on */
atiixp_spdif_enable_dma(chip, 0);
atiixp_spdif_enable_transfer(chip, 1);
timeout = 100;
do {
if (! (atiixp_read(chip, SPDF_DMA_DT_SIZE) & ATI_REG_DMA_FIFO_USED))
break;
udelay(1);
} while (timeout-- > 0);
atiixp_spdif_enable_transfer(chip, 0);
}
/* set up slots and formats for SPDIF OUT */
static int snd_atiixp_spdif_prepare(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
spin_lock_irq(&chip->reg_lock);
if (chip->spdif_over_aclink) {
unsigned int data;
/* enable slots 10/11 */
atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_CONFIG_MASK,
ATI_REG_CMD_SPDF_CONFIG_01);
data = atiixp_read(chip, OUT_DMA_SLOT) & ~ATI_REG_OUT_DMA_SLOT_MASK;
data |= ATI_REG_OUT_DMA_SLOT_BIT(10) |
ATI_REG_OUT_DMA_SLOT_BIT(11);
data |= 0x04 << ATI_REG_OUT_DMA_THRESHOLD_SHIFT;
atiixp_write(chip, OUT_DMA_SLOT, data);
atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_OUT,
substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
ATI_REG_CMD_INTERLEAVE_OUT : 0);
} else {
atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_CONFIG_MASK, 0);
atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_SPDF, 0);
}
spin_unlock_irq(&chip->reg_lock);
return 0;
}
/* set up slots and formats for analog OUT */
static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
unsigned int data;
spin_lock_irq(&chip->reg_lock);
data = atiixp_read(chip, OUT_DMA_SLOT) & ~ATI_REG_OUT_DMA_SLOT_MASK;
switch (substream->runtime->channels) {
case 8:
data |= ATI_REG_OUT_DMA_SLOT_BIT(10) |
ATI_REG_OUT_DMA_SLOT_BIT(11);
fallthrough;
case 6:
data |= ATI_REG_OUT_DMA_SLOT_BIT(7) |
ATI_REG_OUT_DMA_SLOT_BIT(8);
fallthrough;
case 4:
data |= ATI_REG_OUT_DMA_SLOT_BIT(6) |
ATI_REG_OUT_DMA_SLOT_BIT(9);
fallthrough;
default:
data |= ATI_REG_OUT_DMA_SLOT_BIT(3) |
ATI_REG_OUT_DMA_SLOT_BIT(4);
break;
}
/* set output threshold */
data |= 0x04 << ATI_REG_OUT_DMA_THRESHOLD_SHIFT;
atiixp_write(chip, OUT_DMA_SLOT, data);
atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_OUT,
substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
ATI_REG_CMD_INTERLEAVE_OUT : 0);
/*
* enable 6 channel re-ordering bit if needed
*/
atiixp_update(chip, 6CH_REORDER, ATI_REG_6CH_REORDER_EN,
substream->runtime->channels >= 6 ? ATI_REG_6CH_REORDER_EN: 0);
spin_unlock_irq(&chip->reg_lock);
return 0;
}
/* set up slots and formats for analog IN */
static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
spin_lock_irq(&chip->reg_lock);
atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_IN,
substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
ATI_REG_CMD_INTERLEAVE_IN : 0);
spin_unlock_irq(&chip->reg_lock);
return 0;
}
/*
* hw_params - allocate the buffer and set up buffer descriptors
*/
static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
struct atiixp_dma *dma = substream->runtime->private_data;
int err;
dma->buf_addr = substream->runtime->dma_addr;
dma->buf_bytes = params_buffer_bytes(hw_params);
err = atiixp_build_dma_packets(chip, dma, substream,
params_periods(hw_params),
params_period_bytes(hw_params));
if (err < 0)
return err;
if (dma->ac97_pcm_type >= 0) {
struct ac97_pcm *pcm = chip->pcms[dma->ac97_pcm_type];
/* PCM is bound to AC97 codec(s)
* set up the AC97 codecs
*/
if (dma->pcm_open_flag) {
snd_ac97_pcm_close(pcm);
dma->pcm_open_flag = 0;
}
err = snd_ac97_pcm_open(pcm, params_rate(hw_params),
params_channels(hw_params),
pcm->r[0].slots);
if (err >= 0)
dma->pcm_open_flag = 1;
}
return err;
}
static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
struct atiixp_dma *dma = substream->runtime->private_data;
if (dma->pcm_open_flag) {
struct ac97_pcm *pcm = chip->pcms[dma->ac97_pcm_type];
snd_ac97_pcm_close(pcm);
dma->pcm_open_flag = 0;
}
atiixp_clear_dma_packets(chip, dma, substream);
return 0;
}
/*
* pcm hardware definition, identical for all DMA types
*/
static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |