linux_dsm_epyc7002/sound/oss/dmasound/dmasound_paula.c

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/*
* linux/sound/oss/dmasound/dmasound_paula.c
*
* Amiga `Paula' DMA Sound Driver
*
* See linux/sound/oss/dmasound/dmasound_core.c for copyright and credits
* prior to 28/01/2001
*
* 28/01/2001 [0.1] Iain Sandoe
* - added versioning
* - put in and populated the hardware_afmts field.
* [0.2] - put in SNDCTL_DSP_GETCAPS value.
* [0.3] - put in constraint on state buffer usage.
* [0.4] - put in default hard/soft settings
*/
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/soundcard.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <asm/setup.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/machdep.h>
#include "dmasound.h"
#define DMASOUND_PAULA_REVISION 0
#define DMASOUND_PAULA_EDITION 4
#define custom amiga_custom
/*
* The minimum period for audio depends on htotal (for OCS/ECS/AGA)
* (Imported from arch/m68k/amiga/amisound.c)
*/
extern volatile u_short amiga_audio_min_period;
/*
* amiga_mksound() should be able to restore the period after beeping
* (Imported from arch/m68k/amiga/amisound.c)
*/
extern u_short amiga_audio_period;
/*
* Audio DMA masks
*/
#define AMI_AUDIO_OFF (DMAF_AUD0 | DMAF_AUD1 | DMAF_AUD2 | DMAF_AUD3)
#define AMI_AUDIO_8 (DMAF_SETCLR | DMAF_MASTER | DMAF_AUD0 | DMAF_AUD1)
#define AMI_AUDIO_14 (AMI_AUDIO_8 | DMAF_AUD2 | DMAF_AUD3)
/*
* Helper pointers for 16(14)-bit sound
*/
static int write_sq_block_size_half, write_sq_block_size_quarter;
/*** Low level stuff *********************************************************/
static void *AmiAlloc(unsigned int size, gfp_t flags);
static void AmiFree(void *obj, unsigned int size);
static int AmiIrqInit(void);
#ifdef MODULE
static void AmiIrqCleanUp(void);
#endif
static void AmiSilence(void);
static void AmiInit(void);
static int AmiSetFormat(int format);
static int AmiSetVolume(int volume);
static int AmiSetTreble(int treble);
static void AmiPlayNextFrame(int index);
static void AmiPlay(void);
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 20:55:46 +07:00
static irqreturn_t AmiInterrupt(int irq, void *dummy);
#ifdef CONFIG_HEARTBEAT
/*
* Heartbeat interferes with sound since the 7 kHz low-pass filter and the
* power LED are controlled by the same line.
*/
static void (*saved_heartbeat)(int) = NULL;
static inline void disable_heartbeat(void)
{
if (mach_heartbeat) {
saved_heartbeat = mach_heartbeat;
mach_heartbeat = NULL;
}
AmiSetTreble(dmasound.treble);
}
static inline void enable_heartbeat(void)
{
if (saved_heartbeat)
mach_heartbeat = saved_heartbeat;
}
#else /* !CONFIG_HEARTBEAT */
#define disable_heartbeat() do { } while (0)
#define enable_heartbeat() do { } while (0)
#endif /* !CONFIG_HEARTBEAT */
/*** Mid level stuff *********************************************************/
static void AmiMixerInit(void);
static int AmiMixerIoctl(u_int cmd, u_long arg);
static int AmiWriteSqSetup(void);
static int AmiStateInfo(char *buffer, size_t space);
/*** Translations ************************************************************/
/* ++TeSche: radically changed for new expanding purposes...
*
* These two routines now deal with copying/expanding/translating the samples
* from user space into our buffer at the right frequency. They take care about
* how much data there's actually to read, how much buffer space there is and
* to convert samples into the right frequency/encoding. They will only work on
* complete samples so it may happen they leave some bytes in the input stream
* if the user didn't write a multiple of the current sample size. They both
* return the number of bytes they've used from both streams so you may detect
* such a situation. Luckily all programs should be able to cope with that.
*
* I think I've optimized anything as far as one can do in plain C, all
* variables should fit in registers and the loops are really short. There's
* one loop for every possible situation. Writing a more generalized and thus
* parameterized loop would only produce slower code. Feel free to optimize
* this in assembler if you like. :)
*
* I think these routines belong here because they're not yet really hardware
* independent, especially the fact that the Falcon can play 16bit samples
* only in stereo is hardcoded in both of them!
*
* ++geert: split in even more functions (one per format)
*/
/*
* Native format
*/
static ssize_t ami_ct_s8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed, ssize_t frameLeft)
{
ssize_t count, used;
if (!dmasound.soft.stereo) {
void *p = &frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft) & ~1;
used = count;
if (copy_from_user(p, userPtr, count))
return -EFAULT;
} else {
u_char *left = &frame[*frameUsed>>1];
u_char *right = left+write_sq_block_size_half;
count = min_t(unsigned long, userCount, frameLeft)>>1 & ~1;
used = count*2;
while (count > 0) {
if (get_user(*left++, userPtr++)
|| get_user(*right++, userPtr++))
return -EFAULT;
count--;
}
}
*frameUsed += used;
return used;
}
/*
* Copy and convert 8 bit data
*/
#define GENERATE_AMI_CT8(funcname, convsample) \
static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \
u_char frame[], ssize_t *frameUsed, \
ssize_t frameLeft) \
{ \
ssize_t count, used; \
\
if (!dmasound.soft.stereo) { \
u_char *p = &frame[*frameUsed]; \
count = min_t(size_t, userCount, frameLeft) & ~1; \
used = count; \
while (count > 0) { \
u_char data; \
if (get_user(data, userPtr++)) \
return -EFAULT; \
*p++ = convsample(data); \
count--; \
} \
} else { \
u_char *left = &frame[*frameUsed>>1]; \
u_char *right = left+write_sq_block_size_half; \
count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \
used = count*2; \
while (count > 0) { \
u_char data; \
if (get_user(data, userPtr++)) \
return -EFAULT; \
*left++ = convsample(data); \
if (get_user(data, userPtr++)) \
return -EFAULT; \
*right++ = convsample(data); \
count--; \
} \
} \
*frameUsed += used; \
return used; \
}
#define AMI_CT_ULAW(x) (dmasound_ulaw2dma8[(x)])
#define AMI_CT_ALAW(x) (dmasound_alaw2dma8[(x)])
#define AMI_CT_U8(x) ((x) ^ 0x80)
GENERATE_AMI_CT8(ami_ct_ulaw, AMI_CT_ULAW)
GENERATE_AMI_CT8(ami_ct_alaw, AMI_CT_ALAW)
GENERATE_AMI_CT8(ami_ct_u8, AMI_CT_U8)
/*
* Copy and convert 16 bit data
*/
#define GENERATE_AMI_CT_16(funcname, convsample) \
static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \
u_char frame[], ssize_t *frameUsed, \
ssize_t frameLeft) \
{ \
const u_short __user *ptr = (const u_short __user *)userPtr; \
ssize_t count, used; \
u_short data; \
\
if (!dmasound.soft.stereo) { \
u_char *high = &frame[*frameUsed>>1]; \
u_char *low = high+write_sq_block_size_half; \
count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \
used = count*2; \
while (count > 0) { \
if (get_user(data, ptr++)) \
return -EFAULT; \
data = convsample(data); \
*high++ = data>>8; \
*low++ = (data>>2) & 0x3f; \
count--; \
} \
} else { \
u_char *lefth = &frame[*frameUsed>>2]; \
u_char *leftl = lefth+write_sq_block_size_quarter; \
u_char *righth = lefth+write_sq_block_size_half; \
u_char *rightl = righth+write_sq_block_size_quarter; \
count = min_t(size_t, userCount, frameLeft)>>2 & ~1; \
used = count*4; \
while (count > 0) { \
if (get_user(data, ptr++)) \
return -EFAULT; \
data = convsample(data); \
*lefth++ = data>>8; \
*leftl++ = (data>>2) & 0x3f; \
if (get_user(data, ptr++)) \
return -EFAULT; \
data = convsample(data); \
*righth++ = data>>8; \
*rightl++ = (data>>2) & 0x3f; \
count--; \
} \
} \
*frameUsed += used; \
return used; \
}
#define AMI_CT_S16BE(x) (x)
#define AMI_CT_U16BE(x) ((x) ^ 0x8000)
#define AMI_CT_S16LE(x) (le2be16((x)))
#define AMI_CT_U16LE(x) (le2be16((x)) ^ 0x8000)
GENERATE_AMI_CT_16(ami_ct_s16be, AMI_CT_S16BE)
GENERATE_AMI_CT_16(ami_ct_u16be, AMI_CT_U16BE)
GENERATE_AMI_CT_16(ami_ct_s16le, AMI_CT_S16LE)
GENERATE_AMI_CT_16(ami_ct_u16le, AMI_CT_U16LE)
static TRANS transAmiga = {
.ct_ulaw = ami_ct_ulaw,
.ct_alaw = ami_ct_alaw,
.ct_s8 = ami_ct_s8,
.ct_u8 = ami_ct_u8,
.ct_s16be = ami_ct_s16be,
.ct_u16be = ami_ct_u16be,
.ct_s16le = ami_ct_s16le,
.ct_u16le = ami_ct_u16le,
};
/*** Low level stuff *********************************************************/
static inline void StopDMA(void)
{
custom.aud[0].audvol = custom.aud[1].audvol = 0;
custom.aud[2].audvol = custom.aud[3].audvol = 0;
custom.dmacon = AMI_AUDIO_OFF;
enable_heartbeat();
}
static void *AmiAlloc(unsigned int size, gfp_t flags)
{
return amiga_chip_alloc((long)size, "dmasound [Paula]");
}
static void AmiFree(void *obj, unsigned int size)
{
amiga_chip_free (obj);
}
static int __init AmiIrqInit(void)
{
/* turn off DMA for audio channels */
StopDMA();
/* Register interrupt handler. */
if (request_irq(IRQ_AMIGA_AUD0, AmiInterrupt, 0, "DMA sound",
AmiInterrupt))
return 0;
return 1;
}
#ifdef MODULE
static void AmiIrqCleanUp(void)
{
/* turn off DMA for audio channels */
StopDMA();
/* release the interrupt */
free_irq(IRQ_AMIGA_AUD0, AmiInterrupt);
}
#endif /* MODULE */
static void AmiSilence(void)
{
/* turn off DMA for audio channels */
StopDMA();
}
static void AmiInit(void)
{
int period, i;
AmiSilence();
if (dmasound.soft.speed)
period = amiga_colorclock/dmasound.soft.speed-1;
else
period = amiga_audio_min_period;
dmasound.hard = dmasound.soft;
dmasound.trans_write = &transAmiga;
if (period < amiga_audio_min_period) {
/* we would need to squeeze the sound, but we won't do that */
period = amiga_audio_min_period;
} else if (period > 65535) {
period = 65535;
}
dmasound.hard.speed = amiga_colorclock/(period+1);
for (i = 0; i < 4; i++)
custom.aud[i].audper = period;
amiga_audio_period = period;
}
static int AmiSetFormat(int format)
{
int size;
/* Amiga sound DMA supports 8bit and 16bit (pseudo 14 bit) modes */
switch (format) {
case AFMT_QUERY:
return dmasound.soft.format;
case AFMT_MU_LAW:
case AFMT_A_LAW:
case AFMT_U8:
case AFMT_S8:
size = 8;
break;
case AFMT_S16_BE:
case AFMT_U16_BE:
case AFMT_S16_LE:
case AFMT_U16_LE:
size = 16;
break;
default: /* :-) */
size = 8;
format = AFMT_S8;
}
dmasound.soft.format = format;
dmasound.soft.size = size;
if (dmasound.minDev == SND_DEV_DSP) {
dmasound.dsp.format = format;
dmasound.dsp.size = dmasound.soft.size;
}
AmiInit();
return format;
}
#define VOLUME_VOXWARE_TO_AMI(v) \
(((v) < 0) ? 0 : ((v) > 100) ? 64 : ((v) * 64)/100)
#define VOLUME_AMI_TO_VOXWARE(v) ((v)*100/64)
static int AmiSetVolume(int volume)
{
dmasound.volume_left = VOLUME_VOXWARE_TO_AMI(volume & 0xff);
custom.aud[0].audvol = dmasound.volume_left;
dmasound.volume_right = VOLUME_VOXWARE_TO_AMI((volume & 0xff00) >> 8);
custom.aud[1].audvol = dmasound.volume_right;
if (dmasound.hard.size == 16) {
if (dmasound.volume_left == 64 && dmasound.volume_right == 64) {
custom.aud[2].audvol = 1;
custom.aud[3].audvol = 1;
} else {
custom.aud[2].audvol = 0;
custom.aud[3].audvol = 0;
}
}
return VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) |
(VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8);
}
static int AmiSetTreble(int treble)
{
dmasound.treble = treble;
if (treble < 50)
ciaa.pra &= ~0x02;
else
ciaa.pra |= 0x02;
return treble;
}
#define AMI_PLAY_LOADED 1
#define AMI_PLAY_PLAYING 2
#define AMI_PLAY_MASK 3
static void AmiPlayNextFrame(int index)
{
u_char *start, *ch0, *ch1, *ch2, *ch3;
u_long size;
/* used by AmiPlay() if all doubts whether there really is something
* to be played are already wiped out.
*/
start = write_sq.buffers[write_sq.front];
size = (write_sq.count == index ? write_sq.rear_size
: write_sq.block_size)>>1;
if (dmasound.hard.stereo) {
ch0 = start;
ch1 = start+write_sq_block_size_half;
size >>= 1;
} else {
ch0 = start;
ch1 = start;
}
disable_heartbeat();
custom.aud[0].audvol = dmasound.volume_left;
custom.aud[1].audvol = dmasound.volume_right;
if (dmasound.hard.size == 8) {
custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0);
custom.aud[0].audlen = size;
custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1);
custom.aud[1].audlen = size;
custom.dmacon = AMI_AUDIO_8;
} else {
size >>= 1;
custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0);
custom.aud[0].audlen = size;
custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1);
custom.aud[1].audlen = size;
if (dmasound.volume_left == 64 && dmasound.volume_right == 64) {
/* We can play pseudo 14-bit only with the maximum volume */
ch3 = ch0+write_sq_block_size_quarter;
ch2 = ch1+write_sq_block_size_quarter;
custom.aud[2].audvol = 1; /* we are being affected by the beeps */
custom.aud[3].audvol = 1; /* restoring volume here helps a bit */
custom.aud[2].audlc = (u_short *)ZTWO_PADDR(ch2);
custom.aud[2].audlen = size;
custom.aud[3].audlc = (u_short *)ZTWO_PADDR(ch3);
custom.aud[3].audlen = size;
custom.dmacon = AMI_AUDIO_14;
} else {
custom.aud[2].audvol = 0;
custom.aud[3].audvol = 0;
custom.dmacon = AMI_AUDIO_8;
}
}
write_sq.front = (write_sq.front+1) % write_sq.max_count;
write_sq.active |= AMI_PLAY_LOADED;
}
static void AmiPlay(void)
{
int minframes = 1;
custom.intena = IF_AUD0;
if (write_sq.active & AMI_PLAY_LOADED) {
/* There's already a frame loaded */
custom.intena = IF_SETCLR | IF_AUD0;
return;
}
if (write_sq.active & AMI_PLAY_PLAYING)
/* Increase threshold: frame 1 is already being played */
minframes = 2;
if (write_sq.count < minframes) {
/* Nothing to do */
custom.intena = IF_SETCLR | IF_AUD0;
return;
}
if (write_sq.count <= minframes &&
write_sq.rear_size < write_sq.block_size && !write_sq.syncing) {
/* hmmm, the only existing frame is not
* yet filled and we're not syncing?
*/
custom.intena = IF_SETCLR | IF_AUD0;
return;
}
AmiPlayNextFrame(minframes);
custom.intena = IF_SETCLR | IF_AUD0;
}
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 20:55:46 +07:00
static irqreturn_t AmiInterrupt(int irq, void *dummy)
{
int minframes = 1;
custom.intena = IF_AUD0;
if (!write_sq.active) {
/* Playing was interrupted and sq_reset() has already cleared
* the sq variables, so better don't do anything here.
*/
WAKE_UP(write_sq.sync_queue);
return IRQ_HANDLED;
}
if (write_sq.active & AMI_PLAY_PLAYING) {
/* We've just finished a frame */
write_sq.count--;
WAKE_UP(write_sq.action_queue);
}
if (write_sq.active & AMI_PLAY_LOADED)
/* Increase threshold: frame 1 is already being played */
minframes = 2;
/* Shift the flags */
write_sq.active = (write_sq.active<<1) & AMI_PLAY_MASK;
if (!write_sq.active)
/* No frame is playing, disable audio DMA */
StopDMA();
custom.intena = IF_SETCLR | IF_AUD0;
if (write_sq.count >= minframes)
/* Try to play the next frame */
AmiPlay();
if (!write_sq.active)
/* Nothing to play anymore.
Wake up a process waiting for audio output to drain. */
WAKE_UP(write_sq.sync_queue);
return IRQ_HANDLED;
}
/*** Mid level stuff *********************************************************/
/*
* /dev/mixer abstraction
*/
static void __init AmiMixerInit(void)
{
dmasound.volume_left = 64;
dmasound.volume_right = 64;
custom.aud[0].audvol = dmasound.volume_left;
custom.aud[3].audvol = 1; /* For pseudo 14bit */
custom.aud[1].audvol = dmasound.volume_right;
custom.aud[2].audvol = 1; /* For pseudo 14bit */
dmasound.treble = 50;
}
static int AmiMixerIoctl(u_int cmd, u_long arg)
{
int data;
switch (cmd) {
case SOUND_MIXER_READ_DEVMASK:
return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_TREBLE);
case SOUND_MIXER_READ_RECMASK:
return IOCTL_OUT(arg, 0);
case SOUND_MIXER_READ_STEREODEVS:
return IOCTL_OUT(arg, SOUND_MASK_VOLUME);
case SOUND_MIXER_READ_VOLUME:
return IOCTL_OUT(arg,
VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) |
VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8);
case SOUND_MIXER_WRITE_VOLUME:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_volume(data));
case SOUND_MIXER_READ_TREBLE:
return IOCTL_OUT(arg, dmasound.treble);
case SOUND_MIXER_WRITE_TREBLE:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_treble(data));
}
return -EINVAL;
}
static int AmiWriteSqSetup(void)
{
write_sq_block_size_half = write_sq.block_size>>1;
write_sq_block_size_quarter = write_sq_block_size_half>>1;
return 0;
}
static int AmiStateInfo(char *buffer, size_t space)
{
int len = 0;
len += sprintf(buffer+len, "\tsound.volume_left = %d [0...64]\n",
dmasound.volume_left);
len += sprintf(buffer+len, "\tsound.volume_right = %d [0...64]\n",
dmasound.volume_right);
if (len >= space) {
printk(KERN_ERR "dmasound_paula: overflowed state buffer alloc.\n") ;
len = space ;
}
return len;
}
/*** Machine definitions *****************************************************/
static SETTINGS def_hard = {
.format = AFMT_S8,
.stereo = 0,
.size = 8,
.speed = 8000
} ;
static SETTINGS def_soft = {
.format = AFMT_U8,
.stereo = 0,
.size = 8,
.speed = 8000
} ;
static MACHINE machAmiga = {
.name = "Amiga",
.name2 = "AMIGA",
.owner = THIS_MODULE,
.dma_alloc = AmiAlloc,
.dma_free = AmiFree,
.irqinit = AmiIrqInit,
#ifdef MODULE
.irqcleanup = AmiIrqCleanUp,
#endif /* MODULE */
.init = AmiInit,
.silence = AmiSilence,
.setFormat = AmiSetFormat,
.setVolume = AmiSetVolume,
.setTreble = AmiSetTreble,
.play = AmiPlay,
.mixer_init = AmiMixerInit,
.mixer_ioctl = AmiMixerIoctl,
.write_sq_setup = AmiWriteSqSetup,
.state_info = AmiStateInfo,
.min_dsp_speed = 8000,
.version = ((DMASOUND_PAULA_REVISION<<8) | DMASOUND_PAULA_EDITION),
.hardware_afmts = (AFMT_S8 | AFMT_S16_BE), /* h'ware-supported formats *only* here */
.capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */
};
/*** Config & Setup **********************************************************/
static int __init amiga_audio_probe(struct platform_device *pdev)
{
dmasound.mach = machAmiga;
dmasound.mach.default_hard = def_hard ;
dmasound.mach.default_soft = def_soft ;
return dmasound_init();
}
static int __exit amiga_audio_remove(struct platform_device *pdev)
{
dmasound_deinit();
return 0;
}
static struct platform_driver amiga_audio_driver = {
.remove = __exit_p(amiga_audio_remove),
.driver = {
.name = "amiga-audio",
},
};
module_platform_driver_probe(amiga_audio_driver, amiga_audio_probe);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:amiga-audio");