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linux/sound/pcmcia/pdaudiocf/pdaudiocf_irq.c
Takashi Iwai 3b73cfe559 ALSA: pdaudiocf: Use nonatomic PCM ops 
Like other fixes, convert the tasklet to a threaded irq and replace
spinlock with mutex appropriately.  ak4117_lock remains as spinlock
since it's called in another spinlock context from ak4117 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-15 15:52:38 +02:00

327 lines
9.0 KiB
C
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/*
* Driver for Sound Core PDAudioCF soundcard
*
* Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
*
* 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/core.h>
#include "pdaudiocf.h"
#include <sound/initval.h>
#include <asm/irq_regs.h>
/*
*
*/
irqreturn_t pdacf_interrupt(int irq, void *dev)
{
struct snd_pdacf *chip = dev;
unsigned short stat;
bool wake_thread = false;
if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|
PDAUDIOCF_STAT_IS_CONFIGURED|
PDAUDIOCF_STAT_IS_SUSPENDED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
return IRQ_HANDLED; /* IRQ_NONE here? */
stat = inw(chip->port + PDAUDIOCF_REG_ISR);
if (stat & (PDAUDIOCF_IRQLVL|PDAUDIOCF_IRQOVR)) {
if (stat & PDAUDIOCF_IRQOVR) /* should never happen */
snd_printk(KERN_ERR "PDAUDIOCF SRAM buffer overrun detected!\n");
if (chip->pcm_substream)
wake_thread = true;
if (!(stat & PDAUDIOCF_IRQAKM))
stat |= PDAUDIOCF_IRQAKM; /* check rate */
}
if (get_irq_regs() != NULL)
snd_ak4117_check_rate_and_errors(chip->ak4117, 0);
return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
}
static inline void pdacf_transfer_mono16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
while (size-- > 0) {
*dst++ = inw(rdp_port) ^ xor;
inw(rdp_port);
}
}
static inline void pdacf_transfer_mono32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
inw(rdp_port);
*dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
}
}
static inline void pdacf_transfer_stereo16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
while (size-- > 0) {
*dst++ = inw(rdp_port) ^ xor;
*dst++ = inw(rdp_port) ^ xor;
}
}
static inline void pdacf_transfer_stereo32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2, val3;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
val3 = inw(rdp_port);
*dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
*dst++ = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
}
}
static inline void pdacf_transfer_mono16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
while (size-- > 0) {
*dst++ = swab16(inw(rdp_port) ^ xor);
inw(rdp_port);
}
}
static inline void pdacf_transfer_mono32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
inw(rdp_port);
*dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
}
}
static inline void pdacf_transfer_stereo16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
while (size-- > 0) {
*dst++ = swab16(inw(rdp_port) ^ xor);
*dst++ = swab16(inw(rdp_port) ^ xor);
}
}
static inline void pdacf_transfer_stereo32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2, val3;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
val3 = inw(rdp_port);
*dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
*dst++ = swab32((((u32)val3 << 16) | (val2 & 0xff00)) ^ xor);
}
}
static inline void pdacf_transfer_mono24le(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2;
register u32 xval1;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
inw(rdp_port);
xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
*dst++ = (u8)(xval1 >> 8);
*dst++ = (u8)(xval1 >> 16);
*dst++ = (u8)(xval1 >> 24);
}
}
static inline void pdacf_transfer_mono24be(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2;
register u32 xval1;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
inw(rdp_port);
xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
*dst++ = (u8)(xval1 >> 24);
*dst++ = (u8)(xval1 >> 16);
*dst++ = (u8)(xval1 >> 8);
}
}
static inline void pdacf_transfer_stereo24le(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2, val3;
register u32 xval1, xval2;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
val3 = inw(rdp_port);
xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
*dst++ = (u8)(xval1 >> 8);
*dst++ = (u8)(xval1 >> 16);
*dst++ = (u8)(xval1 >> 24);
*dst++ = (u8)(xval2 >> 8);
*dst++ = (u8)(xval2 >> 16);
*dst++ = (u8)(xval2 >> 24);
}
}
static inline void pdacf_transfer_stereo24be(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
{
register u16 val1, val2, val3;
register u32 xval1, xval2;
while (size-- > 0) {
val1 = inw(rdp_port);
val2 = inw(rdp_port);
val3 = inw(rdp_port);
xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
*dst++ = (u8)(xval1 >> 24);
*dst++ = (u8)(xval1 >> 16);
*dst++ = (u8)(xval1 >> 8);
*dst++ = (u8)(xval2 >> 24);
*dst++ = (u8)(xval2 >> 16);
*dst++ = (u8)(xval2 >> 8);
}
}
static void pdacf_transfer(struct snd_pdacf *chip, unsigned int size, unsigned int off)
{
unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
unsigned int xor = chip->pcm_xor;
if (chip->pcm_sample == 3) {
if (chip->pcm_little) {
if (chip->pcm_channels == 1) {
pdacf_transfer_mono24le((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
} else {
pdacf_transfer_stereo24le((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
}
} else {
if (chip->pcm_channels == 1) {
pdacf_transfer_mono24be((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
} else {
pdacf_transfer_stereo24be((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
}
}
return;
}
if (chip->pcm_swab == 0) {
if (chip->pcm_channels == 1) {
if (chip->pcm_frame == 2) {
pdacf_transfer_mono16((u16 *)chip->pcm_area + off, xor, size, rdp_port);
} else {
pdacf_transfer_mono32((u32 *)chip->pcm_area + off, xor, size, rdp_port);
}
} else {
if (chip->pcm_frame == 2) {
pdacf_transfer_stereo16((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
} else {
pdacf_transfer_stereo32((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
}
}
} else {
if (chip->pcm_channels == 1) {
if (chip->pcm_frame == 2) {
pdacf_transfer_mono16sw((u16 *)chip->pcm_area + off, xor, size, rdp_port);
} else {
pdacf_transfer_mono32sw((u32 *)chip->pcm_area + off, xor, size, rdp_port);
}
} else {
if (chip->pcm_frame == 2) {
pdacf_transfer_stereo16sw((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
} else {
pdacf_transfer_stereo32sw((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
}
}
}
}
irqreturn_t pdacf_threaded_irq(int irq, void *dev)
{
struct snd_pdacf *chip = dev;
int size, off, cont, rdp, wdp;
if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|PDAUDIOCF_STAT_IS_CONFIGURED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
return IRQ_HANDLED;
if (chip->pcm_substream == NULL || chip->pcm_substream->runtime == NULL || !snd_pcm_running(chip->pcm_substream))
return IRQ_HANDLED;
rdp = inw(chip->port + PDAUDIOCF_REG_RDP);
wdp = inw(chip->port + PDAUDIOCF_REG_WDP);
/* printk(KERN_DEBUG "TASKLET: rdp = %x, wdp = %x\n", rdp, wdp); */
size = wdp - rdp;
if (size < 0)
size += 0x10000;
if (size == 0)
size = 0x10000;
size /= chip->pcm_frame;
if (size > 64)
size -= 32;
#if 0
chip->pcm_hwptr += size;
chip->pcm_hwptr %= chip->pcm_size;
chip->pcm_tdone += size;
if (chip->pcm_frame == 2) {
unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
while (size-- > 0) {
inw(rdp_port);
inw(rdp_port);
}
} else {
unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
while (size-- > 0) {
inw(rdp_port);
inw(rdp_port);
inw(rdp_port);
}
}
#else
off = chip->pcm_hwptr + chip->pcm_tdone;
off %= chip->pcm_size;
chip->pcm_tdone += size;
while (size > 0) {
cont = chip->pcm_size - off;
if (cont > size)
cont = size;
pdacf_transfer(chip, cont, off);
off += cont;
off %= chip->pcm_size;
size -= cont;
}
#endif
mutex_lock(&chip->reg_lock);
while (chip->pcm_tdone >= chip->pcm_period) {
chip->pcm_hwptr += chip->pcm_period;
chip->pcm_hwptr %= chip->pcm_size;
chip->pcm_tdone -= chip->pcm_period;
mutex_unlock(&chip->reg_lock);
snd_pcm_period_elapsed(chip->pcm_substream);
mutex_lock(&chip->reg_lock);
}
mutex_unlock(&chip->reg_lock);
return IRQ_HANDLED;
}
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