Commit 40830813 authored by Dylan Reid's avatar Dylan Reid Committed by Takashi Iwai
Browse files

ALSA: hda - Allow different ops to read/write registers 



The forthcoming platform hda driver needs to override the way
registers are read and written.  In preparation for that, introduce a
reg_ops struct that can be implemented differently by the new driver.
Change the existing macros to use the new structure, and move them to
hda_priv.h where they will be accessible to both PCI and platform
drivers.

Start with register access, but later commits will add more ops that
differ between PCI and platform.

Signed-off-by: default avatarDylan Reid <dgreid@chromium.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 2538a4f5

sound/pci/hda/hda_intel.c

+94 −70
Original line number Diff line number Diff line
@@ -293,35 +293,6 @@ static char *driver_short_names[] = { 
	[AZX_DRIVER_GENERIC] = "HD-Audio Generic",

};



/*

 * macros for easy use

 */

#define azx_writel(chip,reg,value) \

	writel(value, (chip)->remap_addr + ICH6_REG_##reg)

#define azx_readl(chip,reg) \

	readl((chip)->remap_addr + ICH6_REG_##reg)

#define azx_writew(chip,reg,value) \

	writew(value, (chip)->remap_addr + ICH6_REG_##reg)

#define azx_readw(chip,reg) \

	readw((chip)->remap_addr + ICH6_REG_##reg)

#define azx_writeb(chip,reg,value) \

	writeb(value, (chip)->remap_addr + ICH6_REG_##reg)

#define azx_readb(chip,reg) \

	readb((chip)->remap_addr + ICH6_REG_##reg)



#define azx_sd_writel(dev,reg,value) \

	writel(value, (dev)->sd_addr + ICH6_REG_##reg)

#define azx_sd_readl(dev,reg) \

	readl((dev)->sd_addr + ICH6_REG_##reg)

#define azx_sd_writew(dev,reg,value) \

	writew(value, (dev)->sd_addr + ICH6_REG_##reg)

#define azx_sd_readw(dev,reg) \

	readw((dev)->sd_addr + ICH6_REG_##reg)

#define azx_sd_writeb(dev,reg,value) \

	writeb(value, (dev)->sd_addr + ICH6_REG_##reg)

#define azx_sd_readb(dev,reg) \

	readb((dev)->sd_addr + ICH6_REG_##reg)



/* for pcm support */

#define get_azx_dev(substream) (substream->runtime->private_data)
@@ -876,8 +847,9 @@ static void azx_int_disable(struct azx *chip) 
	/* disable interrupts in stream descriptor */

	for (i = 0; i < chip->num_streams; i++) {

		struct azx_dev *azx_dev = &chip->azx_dev[i];

		azx_sd_writeb(azx_dev, SD_CTL,

			      azx_sd_readb(azx_dev, SD_CTL) & ~SD_INT_MASK);

		azx_sd_writeb(chip, azx_dev, SD_CTL,

			      azx_sd_readb(chip, azx_dev, SD_CTL) &

					~SD_INT_MASK);

	}



	/* disable SIE for all streams */
@@ -896,7 +868,7 @@ static void azx_int_clear(struct azx *chip) 
	/* clear stream status */

	for (i = 0; i < chip->num_streams; i++) {

		struct azx_dev *azx_dev = &chip->azx_dev[i];

		azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK);

		azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK);

	}



	/* clear STATESTS */
@@ -921,16 +893,18 @@ static void azx_stream_start(struct azx *chip, struct azx_dev *azx_dev) 
	azx_writel(chip, INTCTL,

		   azx_readl(chip, INTCTL) | (1 << azx_dev->index));

	/* set DMA start and interrupt mask */

	azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) |

	azx_sd_writeb(chip, azx_dev, SD_CTL,

		      azx_sd_readb(chip, azx_dev, SD_CTL) |

		      SD_CTL_DMA_START | SD_INT_MASK);

}



/* stop DMA */

static void azx_stream_clear(struct azx *chip, struct azx_dev *azx_dev)

{

	azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) &

	azx_sd_writeb(chip, azx_dev, SD_CTL,

		      azx_sd_readb(chip, azx_dev, SD_CTL) &

		      ~(SD_CTL_DMA_START | SD_INT_MASK));

	azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK); /* to be sure */

	azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK); /* to be sure */

}



/* stop a stream */
@@ -1078,8 +1052,8 @@ static irqreturn_t azx_interrupt(int irq, void *dev_id) 
	for (i = 0; i < chip->num_streams; i++) {

		azx_dev = &chip->azx_dev[i];

		if (status & azx_dev->sd_int_sta_mask) {

			sd_status = azx_sd_readb(azx_dev, SD_STS);

			azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK);

			sd_status = azx_sd_readb(chip, azx_dev, SD_STS);

			azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK);

			if (!azx_dev->substream || !azx_dev->running ||

			    !(sd_status & SD_INT_COMPLETE))

				continue;
@@ -1176,8 +1150,8 @@ static int azx_setup_periods(struct azx *chip, 
	int pos_adj;



	/* reset BDL address */

	azx_sd_writel(azx_dev, SD_BDLPL, 0);

	azx_sd_writel(azx_dev, SD_BDLPU, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPL, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPU, 0);



	period_bytes = azx_dev->period_bytes;

	periods = azx_dev->bufsize / period_bytes;
@@ -1239,21 +1213,22 @@ static void azx_stream_reset(struct azx *chip, struct azx_dev *azx_dev) 


	azx_stream_clear(chip, azx_dev);



	azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) |

	azx_sd_writeb(chip, azx_dev, SD_CTL,

		      azx_sd_readb(chip, azx_dev, SD_CTL) |

		      SD_CTL_STREAM_RESET);

	udelay(3);

	timeout = 300;

	while (!((val = azx_sd_readb(azx_dev, SD_CTL)) & SD_CTL_STREAM_RESET) &&

	       --timeout)

	while (!((val = azx_sd_readb(chip, azx_dev, SD_CTL)) &

		 SD_CTL_STREAM_RESET) && --timeout)

		;

	val &= ~SD_CTL_STREAM_RESET;

	azx_sd_writeb(azx_dev, SD_CTL, val);

	azx_sd_writeb(chip, azx_dev, SD_CTL, val);

	udelay(3);



	timeout = 300;

	/* waiting for hardware to report that the stream is out of reset */

	while (((val = azx_sd_readb(azx_dev, SD_CTL)) & SD_CTL_STREAM_RESET) &&

	       --timeout)

	while (((val = azx_sd_readb(chip, azx_dev, SD_CTL)) &

		SD_CTL_STREAM_RESET) && --timeout)

		;



	/* reset first position - may not be synced with hw at this time */
@@ -1269,28 +1244,29 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev) 
	/* make sure the run bit is zero for SD */

	azx_stream_clear(chip, azx_dev);

	/* program the stream_tag */

	val = azx_sd_readl(azx_dev, SD_CTL);

	val = azx_sd_readl(chip, azx_dev, SD_CTL);

	val = (val & ~SD_CTL_STREAM_TAG_MASK) |

		(azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT);

	if (!azx_snoop(chip))

		val |= SD_CTL_TRAFFIC_PRIO;

	azx_sd_writel(azx_dev, SD_CTL, val);

	azx_sd_writel(chip, azx_dev, SD_CTL, val);



	/* program the length of samples in cyclic buffer */

	azx_sd_writel(azx_dev, SD_CBL, azx_dev->bufsize);

	azx_sd_writel(chip, azx_dev, SD_CBL, azx_dev->bufsize);



	/* program the stream format */

	/* this value needs to be the same as the one programmed */

	azx_sd_writew(azx_dev, SD_FORMAT, azx_dev->format_val);

	azx_sd_writew(chip, azx_dev, SD_FORMAT, azx_dev->format_val);



	/* program the stream LVI (last valid index) of the BDL */

	azx_sd_writew(azx_dev, SD_LVI, azx_dev->frags - 1);

	azx_sd_writew(chip, azx_dev, SD_LVI, azx_dev->frags - 1);



	/* program the BDL address */

	/* lower BDL address */

	azx_sd_writel(azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr);

	azx_sd_writel(chip, azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr);

	/* upper BDL address */

	azx_sd_writel(azx_dev, SD_BDLPU, upper_32_bits(azx_dev->bdl.addr));

	azx_sd_writel(chip, azx_dev, SD_BDLPU,

		      upper_32_bits(azx_dev->bdl.addr));



	/* enable the position buffer */

	if (chip->position_fix[0] != POS_FIX_LPIB ||
@@ -1301,8 +1277,8 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev) 
	}



	/* set the interrupt enable bits in the descriptor control register */

	azx_sd_writel(azx_dev, SD_CTL,

		      azx_sd_readl(azx_dev, SD_CTL) | SD_INT_MASK);

	azx_sd_writel(chip, azx_dev, SD_CTL,

		      azx_sd_readl(chip, azx_dev, SD_CTL) | SD_INT_MASK);



	return 0;

}
@@ -1776,9 +1752,9 @@ static int azx_pcm_hw_free(struct snd_pcm_substream *substream) 
	/* reset BDL address */

	dsp_lock(azx_dev);

	if (!dsp_is_locked(azx_dev)) {

		azx_sd_writel(azx_dev, SD_BDLPL, 0);

		azx_sd_writel(azx_dev, SD_BDLPU, 0);

		azx_sd_writel(azx_dev, SD_CTL, 0);

		azx_sd_writel(chip, azx_dev, SD_BDLPL, 0);

		azx_sd_writel(chip, azx_dev, SD_BDLPU, 0);

		azx_sd_writel(chip, azx_dev, SD_CTL, 0);

		azx_dev->bufsize = 0;

		azx_dev->period_bytes = 0;

		azx_dev->format_val = 0;
@@ -1858,7 +1834,8 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream) 
						runtime->rate) * 1000);

	azx_setup_controller(chip, azx_dev);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

		azx_dev->fifo_size = azx_sd_readw(azx_dev, SD_FIFOSIZE) + 1;

		azx_dev->fifo_size =

			azx_sd_readw(chip, azx_dev, SD_FIFOSIZE) + 1;

	else

		azx_dev->fifo_size = 0;
@@ -1950,7 +1927,7 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 
				if (s->pcm->card != substream->pcm->card)

					continue;

				azx_dev = get_azx_dev(s);

				if (!(azx_sd_readb(azx_dev, SD_STS) &

				if (!(azx_sd_readb(chip, azx_dev, SD_STS) &

				      SD_STS_FIFO_READY))

					nwait++;

			}
@@ -1966,7 +1943,7 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 
				if (s->pcm->card != substream->pcm->card)

					continue;

				azx_dev = get_azx_dev(s);

				if (azx_sd_readb(azx_dev, SD_CTL) &

				if (azx_sd_readb(chip, azx_dev, SD_CTL) &

				    SD_CTL_DMA_START)

					nwait++;

			}
@@ -2010,7 +1987,7 @@ static unsigned int azx_via_get_position(struct azx *chip, 
	unsigned int mod_link_pos, mod_dma_pos, mod_mini_pos;

	unsigned int fifo_size;



	link_pos = azx_sd_readl(azx_dev, SD_LPIB);

	link_pos = azx_sd_readl(chip, azx_dev, SD_LPIB);

	if (azx_dev->substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		/* Playback, no problem using link position */

		return link_pos;
@@ -2072,7 +2049,7 @@ static unsigned int azx_get_position(struct azx *chip, 
	switch (chip->position_fix[stream]) {

	case POS_FIX_LPIB:

		/* read LPIB */

		pos = azx_sd_readl(azx_dev, SD_LPIB);

		pos = azx_sd_readl(chip, azx_dev, SD_LPIB);

		break;

	case POS_FIX_VIACOMBO:

		pos = azx_via_get_position(chip, azx_dev);
@@ -2085,7 +2062,7 @@ static unsigned int azx_get_position(struct azx *chip, 
				dev_info(chip->card->dev,

					 "Invalid position buffer, using LPIB read method instead.\n");

				chip->position_fix[stream] = POS_FIX_LPIB;

				pos = azx_sd_readl(azx_dev, SD_LPIB);

				pos = azx_sd_readl(chip, azx_dev, SD_LPIB);

			} else

				chip->position_fix[stream] = POS_FIX_POSBUF;

		}
@@ -2099,7 +2076,7 @@ static unsigned int azx_get_position(struct azx *chip, 
	if (substream->runtime &&

	    chip->position_fix[stream] == POS_FIX_POSBUF &&

	    (chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)) {

		unsigned int lpib_pos = azx_sd_readl(azx_dev, SD_LPIB);

		unsigned int lpib_pos = azx_sd_readl(chip, azx_dev, SD_LPIB);

		if (stream == SNDRV_PCM_STREAM_PLAYBACK)

			delay = pos - lpib_pos;

		else
@@ -2438,8 +2415,8 @@ static int azx_load_dsp_prepare(struct hda_bus *bus, unsigned int format, 
	azx_stream_reset(chip, azx_dev);



	/* reset BDL address */

	azx_sd_writel(azx_dev, SD_BDLPL, 0);

	azx_sd_writel(azx_dev, SD_BDLPU, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPL, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPU, 0);



	azx_dev->frags = 0;

	bdl = (u32 *)azx_dev->bdl.area;
@@ -2488,9 +2465,9 @@ static void azx_load_dsp_cleanup(struct hda_bus *bus, 


	dsp_lock(azx_dev);

	/* reset BDL address */

	azx_sd_writel(azx_dev, SD_BDLPL, 0);

	azx_sd_writel(azx_dev, SD_BDLPU, 0);

	azx_sd_writel(azx_dev, SD_CTL, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPL, 0);

	azx_sd_writel(chip, azx_dev, SD_BDLPU, 0);

	azx_sd_writel(chip, azx_dev, SD_CTL, 0);

	azx_dev->bufsize = 0;

	azx_dev->period_bytes = 0;

	azx_dev->format_val = 0;
@@ -3167,6 +3144,7 @@ static void azx_probe_work(struct work_struct *work) 
 */

static int azx_create(struct snd_card *card, struct pci_dev *pci,

		      int dev, unsigned int driver_caps,

		      const struct hda_controller_ops *hda_ops,

		      struct azx **rchip)

{

	static struct snd_device_ops ops = {
@@ -3192,6 +3170,7 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci, 
	mutex_init(&chip->open_mutex);

	chip->card = card;

	chip->pci = pci;

	chip->ops = hda_ops;

	chip->irq = -1;

	chip->driver_caps = driver_caps;

	chip->driver_type = driver_caps & 0xff;
@@ -3450,6 +3429,50 @@ static void azx_firmware_cb(const struct firmware *fw, void *context) 
}

#endif



/*

 * HDA controller ops.

 */



/* PCI register access. */

static void pci_azx_writel(u32 value, u32 *addr)

{

	writel(value, addr);

}



static u32 pci_azx_readl(u32 *addr)

{

	return readl(addr);

}



static void pci_azx_writew(u16 value, u16 *addr)

{

	writew(value, addr);

}



static u16 pci_azx_readw(u16 *addr)

{

	return readw(addr);

}



static void pci_azx_writeb(u8 value, u8 *addr)

{

	writeb(value, addr);

}



static u8 pci_azx_readb(u8 *addr)

{

	return readb(addr);

}



static const struct hda_controller_ops pci_hda_ops = {

	.writel = pci_azx_writel,

	.readl = pci_azx_readl,

	.writew = pci_azx_writew,

	.readw = pci_azx_readw,

	.writeb = pci_azx_writeb,

	.readb = pci_azx_readb,

};



static int azx_probe(struct pci_dev *pci,

		     const struct pci_device_id *pci_id)

{
@@ -3473,7 +3496,8 @@ static int azx_probe(struct pci_dev *pci, 
		return err;

	}



	err = azx_create(card, pci, dev, pci_id->driver_data, &chip);

	err = azx_create(card, pci, dev, pci_id->driver_data,

			 &pci_hda_ops, &chip);

	if (err < 0)

		goto out_free;

	card->private_data = chip;

sound/pci/hda/hda_priv.h

+44 −0
Original line number Diff line number Diff line
@@ -285,6 +285,17 @@ struct azx_rb { 
	u32 res[AZX_MAX_CODECS];	/* last read value */

};



/* Functions to read/write to hda registers. */

struct hda_controller_ops {

	/* Register Access */

	void (*writel)(u32 value, u32 *addr);

	u32 (*readl)(u32 *addr);

	void (*writew)(u16 value, u16 *addr);

	u16 (*readw)(u16 *addr);

	void (*writeb)(u8 value, u8 *addr);

	u8 (*readb)(u8 *addr);

};



struct azx_pcm {

	struct azx *chip;

	struct snd_pcm *pcm;
@@ -307,6 +318,9 @@ struct azx { 
	int capture_index_offset;

	int num_streams;



	/* Register interaction. */

	const struct hda_controller_ops *ops;



	/* pci resources */

	unsigned long addr;

	void __iomem *remap_addr;
@@ -395,4 +409,34 @@ struct azx { 
#define azx_snoop(chip)		true

#endif



/*

 * macros for easy use

 */



#define azx_writel(chip, reg, value) \

	((chip)->ops->writel(value, (chip)->remap_addr + ICH6_REG_##reg))

#define azx_readl(chip, reg) \

	((chip)->ops->readl((chip)->remap_addr + ICH6_REG_##reg))

#define azx_writew(chip, reg, value) \

	((chip)->ops->writew(value, (chip)->remap_addr + ICH6_REG_##reg))

#define azx_readw(chip, reg) \

	((chip)->ops->readw((chip)->remap_addr + ICH6_REG_##reg))

#define azx_writeb(chip, reg, value) \

	((chip)->ops->writeb(value, (chip)->remap_addr + ICH6_REG_##reg))

#define azx_readb(chip, reg) \

	((chip)->ops->readb((chip)->remap_addr + ICH6_REG_##reg))



#define azx_sd_writel(chip, dev, reg, value) \

	((chip)->ops->writel(value, (dev)->sd_addr + ICH6_REG_##reg))

#define azx_sd_readl(chip, dev, reg) \

	((chip)->ops->readl((dev)->sd_addr + ICH6_REG_##reg))

#define azx_sd_writew(chip, dev, reg, value) \

	((chip)->ops->writew(value, (dev)->sd_addr + ICH6_REG_##reg))

#define azx_sd_readw(chip, dev, reg) \

	((chip)->ops->readw((dev)->sd_addr + ICH6_REG_##reg))

#define azx_sd_writeb(chip, dev, reg, value) \

	((chip)->ops->writeb(value, (dev)->sd_addr + ICH6_REG_##reg))

#define azx_sd_readb(chip, dev, reg) \

	((chip)->ops->readb((dev)->sd_addr + ICH6_REG_##reg))



#endif /* __SOUND_HDA_PRIV_H */

CRA Git | Maintained and supported by SUSTech CRA and CCSE