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linux_dsm_epyc7002/sound/pci/atiixp.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* ALSA driver for ATI IXP 150/200/250/300 AC97 controllers
*
* Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/driver.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/moduleparam.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");
MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250/300/400}}");
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 int spdif_aclink = 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(spdif_aclink, bool, 0444);
MODULE_PARM_DESC(spdif_aclink, "S/PDIF over AC-link.");
/* just for backward compatibility */
static int 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 {
u32 addr; /* DMA buffer address */
u16 status; /* status bits */
u16 size; /* size of the packet in dwords */
u32 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 struct pci_device_id snd_atiixp_ids[] = {
{ 0x1002, 0x4341, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
{ 0x1002, 0x4361, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB300 */
{ 0x1002, 0x4370, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB400 */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
/*
* 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,
snd_dma_pci_data(chip->pci),
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--) {
snd_printk(KERN_WARNING "atiixp: 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)
snd_printk(KERN_WARNING "atiixp: 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) {
snd_printk(KERN_ERR "atiixp: 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;
}
#ifdef CONFIG_PM
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;
}
#endif
/*
* 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 snd_atiixp_codec_detect(struct atiixp *chip)
{
int timeout;
chip->codec_not_ready_bits = 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) {
snd_printk(KERN_ERR "atiixp: 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);
}
snd_printd("atiixp: 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;
snd_printdd("atiixp: XRUN detected (DMA %d)\n", dma->ops->type);
snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
}
/*
* 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;
snd_assert(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:
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->ops->enable_transfer(chip, 0);
dma->running = 0;
dma->suspended = cmd == SNDRV_PCM_TRIGGER_SUSPEND;
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);
/* fallthru */
case 6:
data |= ATI_REG_OUT_DMA_SLOT_BIT(7) |
ATI_REG_OUT_DMA_SLOT_BIT(8);
/* fallthru */
case 4:
data |= ATI_REG_OUT_DMA_SLOT_BIT(6) |
ATI_REG_OUT_DMA_SLOT_BIT(9);
/* fallthru */
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;
err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
if (err < 0)
return 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);
snd_pcm_lib_free_pages(substream);
return 0;
}
/*
* pcm hardware definition, identical for all DMA types
*/
static struct snd_pcm_hardware snd_atiixp_pcm_hw =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 256 * 1024,
.period_bytes_min = 32,
.period_bytes_max = 128 * 1024,
.periods_min = 2,
.periods_max = ATI_MAX_DESCRIPTORS,
};
static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
struct atiixp_dma *dma, int pcm_type)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
if (dma->opened)
return -EBUSY;
dma->substream = substream;
runtime->hw = snd_atiixp_pcm_hw;
dma->ac97_pcm_type = pcm_type;
if (pcm_type >= 0) {
runtime->hw.rates = chip->pcms[pcm_type]->rates;
snd_pcm_limit_hw_rates(runtime);
} else {
/* direct SPDIF */
runtime->hw.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
}
if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
return err;
runtime->private_data = dma;
/* enable DMA bits */
spin_lock_irq(&chip->reg_lock);
dma->ops->enable_dma(chip, 1);
spin_unlock_irq(&chip->reg_lock);
dma->opened = 1;
return 0;
}
static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
struct atiixp_dma *dma)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
/* disable DMA bits */
snd_assert(dma->ops && dma->ops->enable_dma, return -EINVAL);
spin_lock_irq(&chip->reg_lock);
dma->ops->enable_dma(chip, 0);
spin_unlock_irq(&chip->reg_lock);
dma->substream = NULL;
dma->opened = 0;
return 0;
}
/*
*/
static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
int err;
mutex_lock(&chip->open_mutex);
err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
mutex_unlock(&chip->open_mutex);
if (err < 0)
return err;
substream->runtime->hw.channels_max = chip->max_channels;
if (chip->max_channels > 2)
/* channels must be even */
snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS, 2);
return 0;
}
static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
int err;
mutex_lock(&chip->open_mutex);
err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
mutex_unlock(&chip->open_mutex);
return err;
}
static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
}
static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
}
static int snd_atiixp_spdif_open(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
int err;
mutex_lock(&chip->open_mutex);
if (chip->spdif_over_aclink) /* share DMA_PLAYBACK */
err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 2);
else
err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_SPDIF], -1);
mutex_unlock(&chip->open_mutex);
return err;
}
static int snd_atiixp_spdif_close(struct snd_pcm_substream *substream)
{
struct atiixp *chip = snd_pcm_substream_chip(substream);
int err;
mutex_lock(&chip->open_mutex);
if (chip->spdif_over_aclink)
err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
else
err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_SPDIF]);
mutex_unlock(&chip->open_mutex);
return err;
}
/* AC97 playback */
static struct snd_pcm_ops snd_atiixp_playback_ops = {
.open = snd_atiixp_playback_open,
.close = snd_atiixp_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_atiixp_pcm_hw_params,
.hw_free = snd_atiixp_pcm_hw_free,
.prepare = snd_atiixp_playback_prepare,
.trigger = snd_atiixp_pcm_trigger,
.pointer = snd_atiixp_pcm_pointer,
};
/* AC97 capture */
static struct snd_pcm_ops snd_atiixp_capture_ops = {
.open = snd_atiixp_capture_open,
.close = snd_atiixp_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_atiixp_pcm_hw_params,
.hw_free = snd_atiixp_pcm_hw_free,
.prepare = snd_atiixp_capture_prepare,
.trigger = snd_atiixp_pcm_trigger,
.pointer = snd_atiixp_pcm_pointer,
};
/* SPDIF playback */
static struct snd_pcm_ops snd_atiixp_spdif_ops = {
.open = snd_atiixp_spdif_open,
.close = snd_atiixp_spdif_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_atiixp_pcm_hw_params,
.hw_free = snd_atiixp_pcm_hw_free,
.prepare = snd_atiixp_spdif_prepare,
.trigger = snd_atiixp_pcm_trigger,
.pointer = snd_atiixp_pcm_pointer,
};
static struct ac97_pcm atiixp_pcm_defs[] __devinitdata = {
/* front PCM */
{
.exclusive = 1,
.r = { {
.slots = (1 << AC97_SLOT_PCM_LEFT) |
(1 << AC97_SLOT_PCM_RIGHT) |
(1 << AC97_SLOT_PCM_CENTER) |
(1 << AC97_SLOT_PCM_SLEFT) |
(1 << AC97_SLOT_PCM_SRIGHT) |
(1 << AC97_SLOT_LFE)
}
}
},
/* PCM IN #1 */
{
.stream = 1,
.exclusive = 1,
.r = { {
.slots = (1 << AC97_SLOT_PCM_LEFT) |
(1 << AC97_SLOT_PCM_RIGHT)
}
}
},
/* S/PDIF OUT (optional) */
{
.exclusive = 1,
.spdif = 1,
.r = { {
.slots = (1 << AC97_SLOT_SPDIF_LEFT2) |
(1 << AC97_SLOT_SPDIF_RIGHT2)
}
}
},
};
static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
.type = ATI_DMA_PLAYBACK,
.llp_offset = ATI_REG_OUT_DMA_LINKPTR,
.dt_cur = ATI_REG_OUT_DMA_DT_CUR,
.enable_dma = atiixp_out_enable_dma,
.enable_transfer = atiixp_out_enable_transfer,
.flush_dma = atiixp_out_flush_dma,
};
static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
.type = ATI_DMA_CAPTURE,
.llp_offset = ATI_REG_IN_DMA_LINKPTR,
.dt_cur = ATI_REG_IN_DMA_DT_CUR,
.enable_dma = atiixp_in_enable_dma,
.enable_transfer = atiixp_in_enable_transfer,
.flush_dma = atiixp_in_flush_dma,
};
static struct atiixp_dma_ops snd_atiixp_spdif_dma_ops = {
.type = ATI_DMA_SPDIF,
.llp_offset = ATI_REG_SPDF_DMA_LINKPTR,
.dt_cur = ATI_REG_SPDF_DMA_DT_CUR,
.enable_dma = atiixp_spdif_enable_dma,
.enable_transfer = atiixp_spdif_enable_transfer,
.flush_dma = atiixp_spdif_flush_dma,
};
static int __devinit snd_atiixp_pcm_new(struct atiixp *chip)
{
struct snd_pcm *pcm;
struct snd_ac97_bus *pbus = chip->ac97_bus;
int err, i, num_pcms;
/* initialize constants */
chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
if (! chip->spdif_over_aclink)
chip->dmas[ATI_DMA_SPDIF].ops = &snd_atiixp_spdif_dma_ops;
/* assign AC97 pcm */
if (chip->spdif_over_aclink)
num_pcms = 3;
else
num_pcms = 2;
err = snd_ac97_pcm_assign(pbus, num_pcms, atiixp_pcm_defs);
if (err < 0)
return err;
for (i = 0; i < num_pcms; i++)
chip->pcms[i] = &pbus->pcms[i];
chip->max_channels = 2;
if (pbus->pcms[ATI_PCM_OUT].r[0].slots & (1 << AC97_SLOT_PCM_SLEFT)) {
if (pbus->pcms[ATI_PCM_OUT].r[0].slots & (1 << AC97_SLOT_LFE))
chip->max_channels = 6;
else
chip->max_channels = 4;
}
/* PCM #0: analog I/O */
err = snd_pcm_new(chip->card, "ATI IXP AC97",
ATI_PCMDEV_ANALOG, 1, 1, &pcm);
if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
pcm->private_data = chip;
strcpy(pcm->name, "ATI IXP AC97");
chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci),
64*1024, 128*1024);
/* no SPDIF support on codec? */
if (chip->pcms[ATI_PCM_SPDIF] && ! chip->pcms[ATI_PCM_SPDIF]->rates)
return 0;
/* FIXME: non-48k sample rate doesn't work on my test machine with AD1888 */
if (chip->pcms[ATI_PCM_SPDIF])
chip->pcms[ATI_PCM_SPDIF]->rates = SNDRV_PCM_RATE_48000;
/* PCM #1: spdif playback */
err = snd_pcm_new(chip->card, "ATI IXP IEC958",
ATI_PCMDEV_DIGITAL, 1, 0, &pcm);
if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_spdif_ops);
pcm->private_data = chip;
if (chip->spdif_over_aclink)
strcpy(pcm->name, "ATI IXP IEC958 (AC97)");
else
strcpy(pcm->name, "ATI IXP IEC958 (Direct)");
chip->pcmdevs[ATI_PCMDEV_DIGITAL] = pcm;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci),
64*1024, 128*1024);
/* pre-select AC97 SPDIF slots 10/11 */
for (i = 0; i < NUM_ATI_CODECS; i++) {
if (chip->ac97[i])
snd_ac97_update_bits(chip->ac97[i],
AC97_EXTENDED_STATUS,
0x03 << 4, 0x03 << 4);
}
return 0;
}
/*
* interrupt handler
*/
static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
{
struct atiixp *chip = dev_id;
unsigned int status;
status = atiixp_read(chip, ISR);
if (! status)
return IRQ_NONE;
/* process audio DMA */
if (status & ATI_REG_ISR_OUT_XRUN)
snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
else if (status & ATI_REG_ISR_OUT_STATUS)
snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
if (status & ATI_REG_ISR_IN_XRUN)
snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
else if (status & ATI_REG_ISR_IN_STATUS)
snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
if (! chip->spdif_over_aclink) {
if (status & ATI_REG_ISR_SPDF_XRUN)
snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_SPDIF]);
else if (status & ATI_REG_ISR_SPDF_STATUS)
snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_SPDIF]);
}
/* for codec detection */
if (status & CODEC_CHECK_BITS) {
unsigned int detected;
detected = status & CODEC_CHECK_BITS;
spin_lock(&chip->reg_lock);
chip->codec_not_ready_bits |= detected;
atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
spin_unlock(&chip->reg_lock);
}
/* ack */
atiixp_write(chip, ISR, status);
return IRQ_HANDLED;
}
/*
* ac97 mixer section
*/
static struct ac97_quirk ac97_quirks[] __devinitdata = {
{
.subvendor = 0x103c,
.subdevice = 0x006b,
.name = "HP Pavilion ZV5030US",
.type = AC97_TUNE_MUTE_LED
},
{
.subvendor = 0x103c,
.subdevice = 0x308b,
.name = "HP nx6125",
.type = AC97_TUNE_MUTE_LED
},
{ } /* terminator */
};
static int __devinit snd_atiixp_mixer_new(struct atiixp *chip, int clock,
const char *quirk_override)
{
struct snd_ac97_bus *pbus;
struct snd_ac97_template ac97;
int i, err;
int codec_count;
static struct snd_ac97_bus_ops ops = {
.write = snd_atiixp_ac97_write,
.read = snd_atiixp_ac97_read,
};
static unsigned int codec_skip[NUM_ATI_CODECS] = {
ATI_REG_ISR_CODEC0_NOT_READY,
ATI_REG_ISR_CODEC1_NOT_READY,
ATI_REG_ISR_CODEC2_NOT_READY,
};
if (snd_atiixp_codec_detect(chip) < 0)
return -ENXIO;
if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
return err;
pbus->clock = clock;
chip->ac97_bus = pbus;
codec_count = 0;
for (i = 0; i < NUM_ATI_CODECS; i++) {
if (chip->codec_not_ready_bits & codec_skip[i])
continue;
memset(&ac97, 0, sizeof(ac97));
ac97.private_data = chip;
ac97.pci = chip->pci;
ac97.num = i;
ac97.scaps = AC97_SCAP_SKIP_MODEM;
if (! chip->spdif_over_aclink)
ac97.scaps |= AC97_SCAP_NO_SPDIF;
if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
chip->ac97[i] = NULL; /* to be sure */
snd_printdd("atiixp: codec %d not available for audio\n", i);
continue;
}
codec_count++;
}
if (! codec_count) {
snd_printk(KERN_ERR "atiixp: no codec available\n");
return -ENODEV;
}
snd_ac97_tune_hardware(chip->ac97[0], ac97_quirks, quirk_override);
return 0;
}
#ifdef CONFIG_PM
/*
* power management
*/
static int snd_atiixp_suspend(struct pci_dev *pci, pm_message_t state)
{
struct snd_card *card = pci_get_drvdata(pci);
struct atiixp *chip = card->private_data;
int i;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
for (i = 0; i < NUM_ATI_PCMDEVS; i++)
if (chip->pcmdevs[i]) {
struct atiixp_dma *dma = &chip->dmas[i];
if (dma->substream && dma->running)
dma->saved_curptr = readl(chip->remap_addr +
dma->ops->dt_cur);
snd_pcm_suspend_all(chip->pcmdevs[i]);
}
for (i = 0; i < NUM_ATI_CODECS; i++)
snd_ac97_suspend(chip->ac97[i]);
snd_atiixp_aclink_down(chip);
snd_atiixp_chip_stop(chip);
pci_set_power_state(pci, PCI_D3hot);
pci_disable_device(pci);
pci_save_state(pci);
return 0;
}
static int snd_atiixp_resume(struct pci_dev *pci)
{
struct snd_card *card = pci_get_drvdata(pci);
struct atiixp *chip = card->private_data;
int i;
pci_restore_state(pci);
pci_enable_device(pci);
pci_set_power_state(pci, PCI_D0);
pci_set_master(pci);
snd_atiixp_aclink_reset(chip);
snd_atiixp_chip_start(chip);
for (i = 0; i < NUM_ATI_CODECS; i++)
snd_ac97_resume(chip->ac97[i]);
for (i = 0; i < NUM_ATI_PCMDEVS; i++)
if (chip->pcmdevs[i]) {
struct atiixp_dma *dma = &chip->dmas[i];
if (dma->substream && dma->suspended) {
dma->ops->enable_dma(chip, 1);
dma->substream->ops->prepare(dma->substream);
writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
chip->remap_addr + dma->ops->llp_offset);
writel(dma->saved_curptr, chip->remap_addr +
dma->ops->dt_cur);
}
}
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif /* CONFIG_PM */
#ifdef CONFIG_PROC_FS
/*
* proc interface for register dump
*/
static void snd_atiixp_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct atiixp *chip = entry->private_data;
int i;
for (i = 0; i < 256; i += 4)
snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
}
static void __devinit snd_atiixp_proc_init(struct atiixp *chip)
{
struct snd_info_entry *entry;
if (! snd_card_proc_new(chip->card, "atiixp", &entry))
snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
}
#else /* !CONFIG_PROC_FS */
#define snd_atiixp_proc_init(chip)
#endif
/*
* destructor
*/
static int snd_atiixp_free(struct atiixp *chip)
{
if (chip->irq < 0)
goto __hw_end;
snd_atiixp_chip_stop(chip);
synchronize_irq(chip->irq);
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
if (chip->remap_addr)
iounmap(chip->remap_addr);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
return 0;
}
static int snd_atiixp_dev_free(struct snd_device *device)
{
struct atiixp *chip = device->device_data;
return snd_atiixp_free(chip);
}
/*
* constructor for chip instance
*/
static int __devinit snd_atiixp_create(struct snd_card *card,
struct pci_dev *pci,
struct atiixp **r_chip)
{
static struct snd_device_ops ops = {
.dev_free = snd_atiixp_dev_free,
};
struct atiixp *chip;
int err;
if ((err = pci_enable_device(pci)) < 0)
return err;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL) {
pci_disable_device(pci);
return -ENOMEM;
}
spin_lock_init(&chip->reg_lock);
mutex_init(&chip->open_mutex);
chip->card = card;
chip->pci = pci;
chip->irq = -1;
if ((err = pci_request_regions(pci, "ATI IXP AC97")) < 0) {
pci_disable_device(pci);
kfree(chip);
return err;
}
chip->addr = pci_resource_start(pci, 0);
chip->remap_addr = ioremap_nocache(chip->addr, pci_resource_len(pci, 0));
if (chip->remap_addr == NULL) {
snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
snd_atiixp_free(chip);
return -EIO;
}
if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_DISABLED|IRQF_SHARED,
card->shortname, chip)) {
snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
snd_atiixp_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;
pci_set_master(pci);
synchronize_irq(chip->irq);
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
snd_atiixp_free(chip);
return err;
}
snd_card_set_dev(card, &pci->dev);
*r_chip = chip;
return 0;
}
static int __devinit snd_atiixp_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
struct snd_card *card;
struct atiixp *chip;
unsigned char revision;
int err;
card = snd_card_new(index, id, THIS_MODULE, 0);
if (card == NULL)
return -ENOMEM;
pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
strcpy(card->driver, spdif_aclink ? "ATIIXP" : "ATIIXP-SPDMA");
strcpy(card->shortname, "ATI IXP");
if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
goto __error;
card->private_data = chip;
if ((err = snd_atiixp_aclink_reset(chip)) < 0)
goto __error;
chip->spdif_over_aclink = spdif_aclink;
if ((err = snd_atiixp_mixer_new(chip, ac97_clock, ac97_quirk)) < 0)
goto __error;
if ((err = snd_atiixp_pcm_new(chip)) < 0)
goto __error;
snd_atiixp_proc_init(chip);
snd_atiixp_chip_start(chip);
snprintf(card->longname, sizeof(card->longname),
"%s rev %x with %s at %#lx, irq %i", card->shortname, revision,
chip->ac97[0] ? snd_ac97_get_short_name(chip->ac97[0]) : "?",
chip->addr, chip->irq);
if ((err = snd_card_register(card)) < 0)
goto __error;
pci_set_drvdata(pci, card);
return 0;
__error:
snd_card_free(card);
return err;
}
static void __devexit snd_atiixp_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
static struct pci_driver driver = {
.name = "ATI IXP AC97 controller",
.id_table = snd_atiixp_ids,
.probe = snd_atiixp_probe,
.remove = __devexit_p(snd_atiixp_remove),
#ifdef CONFIG_PM
.suspend = snd_atiixp_suspend,
.resume = snd_atiixp_resume,
#endif
};
static int __init alsa_card_atiixp_init(void)
{
return pci_register_driver(&driver);
}
static void __exit alsa_card_atiixp_exit(void)
{
pci_unregister_driver(&driver);
}
module_init(alsa_card_atiixp_init)
module_exit(alsa_card_atiixp_exit)
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