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linux/sound/pci/atiixp_modem.c
Takashi Iwai 48e8adde8d ALSA: atiixp: Fix the missing snd_card_free() call at probe error 
The previous cleanup with devres may lead to the incorrect release
orders at the probe error handling due to the devres's nature.  Until
we register the card, snd_card_free() has to be called at first for
releasing the stuff properly when the driver tries to manage and
release the stuff via card->private_free().

This patch fixes it by calling snd_card_free() on the error from the
probe callback using a new helper function.

Fixes: 86bde74dbf ("ALSA: atiixp: Allocate resources with device-managed APIs")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-04-12 17:58:20 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA driver for ATI IXP 150/200/250 AC97 modem 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 MC97 controller");
MODULE_LICENSE("GPL");
static int index = -2; /* Exclude the first card */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
static int ac97_clock = 48000;
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).");
/* just for backward compatibility */
static bool enable;
module_param(enable, bool, 0444);
/*
*/
#define ATI_REG_ISR 0x00 /* interrupt source */
#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
#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_ISR_MODEM_GPIO_DATA (1U<<14)
#define ATI_REG_IER 0x04 /* interrupt enable */
#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
#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_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
#define ATI_REG_CMD 0x08 /* command */
#define ATI_REG_CMD_POWERDOWN (1U<<0)
#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
#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_MODEM_IN_DMA_LINKPTR 0x20
#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
#define ATI_REG_MODEM_OUT_FIFO_USED 0x70
#define ATI_REG_MODEM_OUT_GPIO 0x74
#define ATI_REG_MODEM_OUT_GPIO_EN 1
#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
#define ATI_REG_MODEM_IN_GPIO 0x78
#define ATI_REG_MODEM_MIRROR 0x7c
#define ATI_REG_AUDIO_MIRROR 0x80
#define ATI_REG_MODEM_FIFO_FLUSH 0x88
#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
/* LINKPTR */
#define ATI_REG_LINKPTR_EN (1U<<0)
#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
struct atiixp_modem;
/*
* 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, NUM_ATI_DMAS }; /* DMAs */
enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
enum { ATI_PCMDEV_ANALOG, 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_modem *chip, int on);
/* called from trigger (START/STOP) */
void (*enable_transfer)(struct atiixp_modem *chip, int on);
/* called from trigger (STOP only) */
void (*flush_dma)(struct atiixp_modem *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 pcm_open_flag;
int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
};
/*
* ATI IXP chip
*/
struct atiixp_modem {
struct snd_card *card;
struct pci_dev *pci;
struct resource *res; /* memory i/o */
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, 0x434d), 0 }, /* SB200 */
{ PCI_VDEVICE(ATI, 0x4378), 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_modem *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_modem *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_modem *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_modem *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_modem *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_modem *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_modem *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_modem *chip = ac97->private_data;
if (reg == AC97_GPIO_STATUS) {
atiixp_write(chip, MODEM_OUT_GPIO,
(val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
return;
}
snd_atiixp_codec_write(chip, ac97->num, reg, val);
}
/*
* reset AC link
*/
static int snd_atiixp_aclink_reset(struct atiixp_modem *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);
msleep(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;
}
#ifdef CONFIG_PM_SLEEP
static int snd_atiixp_aclink_down(struct atiixp_modem *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_modem *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) {
msleep(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_modem *chip)
{
unsigned int reg;
/* set up spdif, enable burst mode */
reg = atiixp_read(chip, CMD);
reg |= ATI_REG_CMD_BURST_EN;
if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
reg |= ATI_REG_CMD_MODEM_PRESENT;
atiixp_write(chip, CMD, reg);
/* clear all interrupt source */
atiixp_write(chip, ISR, 0xffffffff);
/* enable irqs */
atiixp_write(chip, IER,
ATI_REG_IER_MODEM_STATUS_EN |
ATI_REG_IER_MODEM_IN_XRUN_EN |
ATI_REG_IER_MODEM_OUT1_XRUN_EN);
return 0;
}
/*
* disable DMA and IRQs
*/
static int snd_atiixp_chip_stop(struct atiixp_modem *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_modem *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_modem *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_modem *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_modem *chip)
{
unsigned int bus_busy;
if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
ATI_REG_CMD_MODEM_RECEIVE_EN))
bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
else
bus_busy = 0;
atiixp_update(chip, IER, ATI_REG_IER_MODEM_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_modem *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:
dma->ops->enable_transfer(chip, 1);
dma->running = 1;
break;
case SNDRV_PCM_TRIGGER_STOP:
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_modem *chip)
{
atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
}
/* enable/disable analog OUT DMA */
static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
{
unsigned int data;
data = atiixp_read(chip, CMD);
if (on) {
if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
return;
atiixp_out_flush_dma(chip);
data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
} else
data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
atiixp_write(chip, CMD, data);
}
/* start/stop transfer over OUT DMA */
static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
{
atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
}
/* enable/disable analog IN DMA */
static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
{
atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
}
/* start/stop analog IN DMA */
static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
{
if (on) {
unsigned int data = atiixp_read(chip, CMD);
if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
atiixp_write(chip, CMD, data);
}
} else
atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
}
/* flush FIFO of analog IN DMA */
static void atiixp_in_flush_dma(struct atiixp_modem *chip)
{
atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
}
/* set up slots and formats for analog OUT */
static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
{
struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
unsigned int data;
spin_lock_irq(&chip->reg_lock);
/* set output threshold */
data = atiixp_read(chip, MODEM_OUT_FIFO);
data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
atiixp_write(chip, MODEM_OUT_FIFO, data);
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)
{
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_modem *chip = snd_pcm_substream_chip(substream);
struct atiixp_dma *dma = substream->runtime->private_data;
int err;
int i;
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;
/* set up modem rate */
for (i = 0; i < NUM_ATI_CODECS; i++) {
if (! chip->ac97[i])
continue;
snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
}
return err;
}
static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
struct atiixp_dma *dma = substream->runtime->private_data;
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 |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = (SNDRV_PCM_RATE_8000 |
SNDRV_PCM_RATE_16000 |
SNDRV_PCM_RATE_KNOT),
.rate_min = 8000,
.rate_max = 16000,
.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_modem *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
.count = ARRAY_SIZE(rates),
.list = rates,
.mask = 0,
};
if (snd_BUG_ON(!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;
err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
&hw_constraints_rates);
if (err < 0)
return err;
err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
if (err < 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_modem *chip = snd_pcm_substream_chip(substream);
/* disable DMA bits */
if (snd_BUG_ON(!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_modem *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;
return 0;
}
static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
{
struct atiixp_modem *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_modem *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_modem *chip = snd_pcm_substream_chip(substream);
return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
}
/* AC97 playback */
static const struct snd_pcm_ops snd_atiixp_playback_ops = {
.open = snd_atiixp_playback_open,
.close = snd_atiixp_playback_close,
.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 const struct snd_pcm_ops snd_atiixp_capture_ops = {
.open = snd_atiixp_capture_open,
.close = snd_atiixp_capture_close,
.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,
};
static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
.type = ATI_DMA_PLAYBACK,
.llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
.dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
.enable_dma = atiixp_out_enable_dma,
.enable_transfer = atiixp_out_enable_transfer,
.flush_dma = atiixp_out_flush_dma,
};
static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
.type = ATI_DMA_CAPTURE,
.llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
.dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
.enable_dma = atiixp_in_enable_dma,
.enable_transfer = atiixp_in_enable_transfer,
.flush_dma = atiixp_in_flush_dma,
};
static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
{
struct snd_pcm *pcm;
int err;
/* initialize constants */
chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
/* PCM #0: analog I/O */
err = snd_pcm_new(chip->card, "ATI IXP MC97", 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->dev_class = SNDRV_PCM_CLASS_MODEM;
pcm->private_data = chip;
strcpy(pcm->name, "ATI IXP MC97");
chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
&chip->pci->dev, 64*1024, 128*1024);
return 0;
}
/*
* interrupt handler
*/
static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
{
struct atiixp_modem *chip = dev_id;
unsigned int status;
status = atiixp_read(chip, ISR);
if (! status)
return IRQ_NONE;
/* process audio DMA */
if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
if (status & ATI_REG_ISR_MODEM_IN_XRUN)
snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
/* 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 int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
{
struct snd_ac97_bus *pbus;
struct snd_ac97_template ac97;
int i, err;
int codec_count;
static const struct snd_ac97_bus_ops ops = {
.write = snd_atiixp_ac97_write,
.read = snd_atiixp_ac97_read,
};
static const 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;
err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus);
if (err < 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_AUDIO | AC97_SCAP_POWER_SAVE;
err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i]);
if (err < 0) {
chip->ac97[i] = NULL; /* to be sure */
dev_dbg(chip->card->dev,
"codec %d not available for modem\n", i);
continue;
}
codec_count++;
}
if (! codec_count) {
dev_err(chip->card->dev, "no codec available\n");
return -ENODEV;
}
/* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
return 0;
}
#ifdef CONFIG_PM_SLEEP
/*
* power management
*/
static int snd_atiixp_suspend(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct atiixp_modem *chip = card->private_data;
int i;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
for (i = 0; i < NUM_ATI_CODECS; i++)
snd_ac97_suspend(chip->ac97[i]);
snd_atiixp_aclink_down(chip);
snd_atiixp_chip_stop(chip);
return 0;
}
static int snd_atiixp_resume(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct atiixp_modem *chip = card->private_data;
int i;
snd_atiixp_aclink_reset(chip);
snd_atiixp_chip_start(chip);
for (i = 0; i < NUM_ATI_CODECS; i++)
snd_ac97_resume(chip->ac97[i]);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
#define SND_ATIIXP_PM_OPS &snd_atiixp_pm
#else
#define SND_ATIIXP_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
/*
* proc interface for register dump
*/
static void snd_atiixp_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct atiixp_modem *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 snd_atiixp_proc_init(struct atiixp_modem *chip)
{
snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,
snd_atiixp_proc_read);
}
/*
* destructor
*/
static void snd_atiixp_free(struct snd_card *card)
{
snd_atiixp_chip_stop(card->private_data);
}
/*
* constructor for chip instance
*/
static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci)
{
struct atiixp_modem *chip = card->private_data;
int err;
err = pcim_enable_device(pci);
if (err < 0)
return err;
spin_lock_init(&chip->reg_lock);
mutex_init(&chip->open_mutex);
chip->card = card;
chip->pci = pci;
chip->irq = -1;
err = pcim_iomap_regions(pci, 1 << 0, "ATI IXP MC97");
if (err < 0)
return err;
chip->addr = pci_resource_start(pci, 0);
chip->remap_addr = pcim_iomap_table(pci)[0];
if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_interrupt,
IRQF_SHARED, KBUILD_MODNAME, chip)) {
dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
return -EBUSY;
}
chip->irq = pci->irq;
card->sync_irq = chip->irq;
card->private_free = snd_atiixp_free;
pci_set_master(pci);
return 0;
}
static int __snd_atiixp_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
struct snd_card *card;
struct atiixp_modem *chip;
int err;
err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
sizeof(*chip), &card);
if (err < 0)
return err;
chip = card->private_data;
strcpy(card->driver, "ATIIXP-MODEM");
strcpy(card->shortname, "ATI IXP Modem");
err = snd_atiixp_init(card, pci);
if (err < 0)
return err;
err = snd_atiixp_aclink_reset(chip);
if (err < 0)
return err;
err = snd_atiixp_mixer_new(chip, ac97_clock);
if (err < 0)
return err;
err = snd_atiixp_pcm_new(chip);
if (err < 0)
return err;
snd_atiixp_proc_init(chip);
snd_atiixp_chip_start(chip);
sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
card->shortname, pci->revision, chip->addr, chip->irq);
err = snd_card_register(card);
if (err < 0)
return err;
pci_set_drvdata(pci, card);
return 0;
}
static int snd_atiixp_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
return snd_card_free_on_error(&pci->dev, __snd_atiixp_probe(pci, pci_id));
}
static struct pci_driver atiixp_modem_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_atiixp_ids,
.probe = snd_atiixp_probe,
.driver = {
.pm = SND_ATIIXP_PM_OPS,
},
};
module_pci_driver(atiixp_modem_driver);
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