kevin/linux
1
Fork 0
Code
456ef1553c
linux/sound/oss/dmasound/dmasound_atari.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

1619 lines
42 KiB
C
Raw Blame History

/*
* linux/sound/oss/dmasound/dmasound_atari.c
*
* Atari TT and Falcon 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.
* 01/02/2001 [0.3] - put in default hard/soft settings.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/soundcard.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <asm/uaccess.h>
#include <asm/atariints.h>
#include <asm/atari_stram.h>
#include "dmasound.h"
#define DMASOUND_ATARI_REVISION 0
#define DMASOUND_ATARI_EDITION 3
extern void atari_microwire_cmd(int cmd);
static int is_falcon;
static int write_sq_ignore_int; /* ++TeSche: used for Falcon */
static int expand_bal; /* Balance factor for expanding (not volume!) */
static int expand_data; /* Data for expanding */
/*** 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)
*/
static ssize_t ata_ct_law(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_s8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_u8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_s16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_u16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_s16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ct_u16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_law(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_s8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_u8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_s16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_u16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_s16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
static ssize_t ata_ctx_u16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft);
/*** Low level stuff *********************************************************/
static void *AtaAlloc(unsigned int size, gfp_t flags);
static void AtaFree(void *, unsigned int size);
static int AtaIrqInit(void);
#ifdef MODULE
static void AtaIrqCleanUp(void);
#endif /* MODULE */
static int AtaSetBass(int bass);
static int AtaSetTreble(int treble);
static void TTSilence(void);
static void TTInit(void);
static int TTSetFormat(int format);
static int TTSetVolume(int volume);
static int TTSetGain(int gain);
static void FalconSilence(void);
static void FalconInit(void);
static int FalconSetFormat(int format);
static int FalconSetVolume(int volume);
static void AtaPlayNextFrame(int index);
static void AtaPlay(void);
static irqreturn_t AtaInterrupt(int irq, void *dummy);
/*** Mid level stuff *********************************************************/
static void TTMixerInit(void);
static void FalconMixerInit(void);
static int AtaMixerIoctl(u_int cmd, u_long arg);
static int TTMixerIoctl(u_int cmd, u_long arg);
static int FalconMixerIoctl(u_int cmd, u_long arg);
static int AtaWriteSqSetup(void);
static int AtaSqOpen(mode_t mode);
static int TTStateInfo(char *buffer, size_t space);
static int FalconStateInfo(char *buffer, size_t space);
/*** Translations ************************************************************/
static ssize_t ata_ct_law(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
char *table = dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8
: dmasound_alaw2dma8;
ssize_t count, used;
u_char *p = &frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft);
if (dmasound.soft.stereo)
count &= ~1;
used = count;
while (count > 0) {
u_char data;
if (get_user(data, userPtr++))
return -EFAULT;
*p++ = table[data];
count--;
}
*frameUsed += used;
return used;
}
static ssize_t ata_ct_s8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
ssize_t count, used;
void *p = &frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft);
if (dmasound.soft.stereo)
count &= ~1;
used = count;
if (copy_from_user(p, userPtr, count))
return -EFAULT;
*frameUsed += used;
return used;
}
static ssize_t ata_ct_u8(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(unsigned long, userCount, frameLeft);
used = count;
while (count > 0) {
u_char data;
if (get_user(data, userPtr++))
return -EFAULT;
*p++ = data ^ 0x80;
count--;
}
} else {
u_short *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>1;
used = count*2;
while (count > 0) {
u_short data;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
*p++ = data ^ 0x8080;
count--;
}
}
*frameUsed += used;
return used;
}
static ssize_t ata_ct_s16be(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_short *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>1;
used = count*2;
while (count > 0) {
u_short data;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
*p++ = data;
*p++ = data;
count--;
}
*frameUsed += used*2;
} else {
void *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft) & ~3;
used = count;
if (copy_from_user(p, userPtr, count))
return -EFAULT;
*frameUsed += used;
}
return used;
}
static ssize_t ata_ct_u16be(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_short *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>1;
used = count*2;
while (count > 0) {
u_short data;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data ^= 0x8000;
*p++ = data;
*p++ = data;
count--;
}
*frameUsed += used*2;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>2;
used = count*4;
while (count > 0) {
u_int data;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
*p++ = data ^ 0x80008000;
count--;
}
*frameUsed += used;
}
return used;
}
static ssize_t ata_ct_s16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
ssize_t count, used;
count = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>1;
used = count*2;
while (count > 0) {
u_short data;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data = le2be16(data);
*p++ = data;
*p++ = data;
count--;
}
*frameUsed += used*2;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>2;
used = count*4;
while (count > 0) {
u_long data;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
data = le2be16dbl(data);
*p++ = data;
count--;
}
*frameUsed += used;
}
return used;
}
static ssize_t ata_ct_u16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
ssize_t count, used;
count = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>1;
used = count*2;
while (count > 0) {
u_short data;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data = le2be16(data) ^ 0x8000;
*p++ = data;
*p++ = data;
}
*frameUsed += used*2;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
count = min_t(unsigned long, userCount, frameLeft)>>2;
used = count;
while (count > 0) {
u_long data;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
data = le2be16dbl(data) ^ 0x80008000;
*p++ = data;
count--;
}
*frameUsed += used;
}
return used;
}
static ssize_t ata_ctx_law(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
char *table = dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8
: dmasound_alaw2dma8;
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_char *p = &frame[*frameUsed];
u_char data = expand_data;
while (frameLeft) {
u_char c;
if (bal < 0) {
if (!userCount)
break;
if (get_user(c, userPtr++))
return -EFAULT;
data = table[c];
userCount--;
bal += hSpeed;
}
*p++ = data;
frameLeft--;
bal -= sSpeed;
}
expand_data = data;
} else {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 2) {
u_char c;
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(c, userPtr++))
return -EFAULT;
data = table[c] << 8;
if (get_user(c, userPtr++))
return -EFAULT;
data |= table[c];
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 2;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_s8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_char *p = &frame[*frameUsed];
u_char data = expand_data;
while (frameLeft) {
if (bal < 0) {
if (!userCount)
break;
if (get_user(data, userPtr++))
return -EFAULT;
userCount--;
bal += hSpeed;
}
*p++ = data;
frameLeft--;
bal -= sSpeed;
}
expand_data = data;
} else {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 2) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 2;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_u8(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_char *p = &frame[*frameUsed];
u_char data = expand_data;
while (frameLeft) {
if (bal < 0) {
if (!userCount)
break;
if (get_user(data, userPtr++))
return -EFAULT;
data ^= 0x80;
userCount--;
bal += hSpeed;
}
*p++ = data;
frameLeft--;
bal -= sSpeed;
}
expand_data = data;
} else {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 2) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data ^= 0x8080;
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 2;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_s16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
u_long data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 4)
break;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
userCount -= 4;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_u16be(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data ^= 0x8000;
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
u_long data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 4)
break;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
data ^= 0x80008000;
userCount -= 4;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_s16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data = le2be16(data);
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
u_long data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 4)
break;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
data = le2be16dbl(data);
userCount -= 4;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static ssize_t ata_ctx_u16le(const u_char __user *userPtr, size_t userCount,
u_char frame[], ssize_t *frameUsed,
ssize_t frameLeft)
{
/* this should help gcc to stuff everything into registers */
long bal = expand_bal;
long hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
ssize_t used, usedf;
used = userCount;
usedf = frameLeft;
if (!dmasound.soft.stereo) {
u_short *p = (u_short *)&frame[*frameUsed];
u_short data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 2)
break;
if (get_user(data, (u_short __user *)userPtr))
return -EFAULT;
userPtr += 2;
data = le2be16(data) ^ 0x8000;
userCount -= 2;
bal += hSpeed;
}
*p++ = data;
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
} else {
u_long *p = (u_long *)&frame[*frameUsed];
u_long data = expand_data;
while (frameLeft >= 4) {
if (bal < 0) {
if (userCount < 4)
break;
if (get_user(data, (u_int __user *)userPtr))
return -EFAULT;
userPtr += 4;
data = le2be16dbl(data) ^ 0x80008000;
userCount -= 4;
bal += hSpeed;
}
*p++ = data;
frameLeft -= 4;
bal -= sSpeed;
}
expand_data = data;
}
expand_bal = bal;
used -= userCount;
*frameUsed += usedf-frameLeft;
return used;
}
static TRANS transTTNormal = {
.ct_ulaw = ata_ct_law,
.ct_alaw = ata_ct_law,
.ct_s8 = ata_ct_s8,
.ct_u8 = ata_ct_u8,
};
static TRANS transTTExpanding = {
.ct_ulaw = ata_ctx_law,
.ct_alaw = ata_ctx_law,
.ct_s8 = ata_ctx_s8,
.ct_u8 = ata_ctx_u8,
};
static TRANS transFalconNormal = {
.ct_ulaw = ata_ct_law,
.ct_alaw = ata_ct_law,
.ct_s8 = ata_ct_s8,
.ct_u8 = ata_ct_u8,
.ct_s16be = ata_ct_s16be,
.ct_u16be = ata_ct_u16be,
.ct_s16le = ata_ct_s16le,
.ct_u16le = ata_ct_u16le
};
static TRANS transFalconExpanding = {
.ct_ulaw = ata_ctx_law,
.ct_alaw = ata_ctx_law,
.ct_s8 = ata_ctx_s8,
.ct_u8 = ata_ctx_u8,
.ct_s16be = ata_ctx_s16be,
.ct_u16be = ata_ctx_u16be,
.ct_s16le = ata_ctx_s16le,
.ct_u16le = ata_ctx_u16le,
};
/*** Low level stuff *********************************************************/
/*
* Atari (TT/Falcon)
*/
static void *AtaAlloc(unsigned int size, gfp_t flags)
{
return atari_stram_alloc(size, "dmasound");
}
static void AtaFree(void *obj, unsigned int size)
{
atari_stram_free( obj );
}
static int __init AtaIrqInit(void)
{
/* Set up timer A. Timer A
will receive a signal upon end of playing from the sound
hardware. Furthermore Timer A is able to count events
and will cause an interrupt after a programmed number
of events. So all we need to keep the music playing is
to provide the sound hardware with new data upon
an interrupt from timer A. */
mfp.tim_ct_a = 0; /* ++roman: Stop timer before programming! */
mfp.tim_dt_a = 1; /* Cause interrupt after first event. */
mfp.tim_ct_a = 8; /* Turn on event counting. */
/* Register interrupt handler. */
request_irq(IRQ_MFP_TIMA, AtaInterrupt, IRQ_TYPE_SLOW, "DMA sound",
AtaInterrupt);
mfp.int_en_a |= 0x20; /* Turn interrupt on. */
mfp.int_mk_a |= 0x20;
return 1;
}
#ifdef MODULE
static void AtaIrqCleanUp(void)
{
mfp.tim_ct_a = 0; /* stop timer */
mfp.int_en_a &= ~0x20; /* turn interrupt off */
free_irq(IRQ_MFP_TIMA, AtaInterrupt);
}
#endif /* MODULE */
#define TONE_VOXWARE_TO_DB(v) \
(((v) < 0) ? -12 : ((v) > 100) ? 12 : ((v) - 50) * 6 / 25)
#define TONE_DB_TO_VOXWARE(v) (((v) * 25 + ((v) > 0 ? 5 : -5)) / 6 + 50)
static int AtaSetBass(int bass)
{
dmasound.bass = TONE_VOXWARE_TO_DB(bass);
atari_microwire_cmd(MW_LM1992_BASS(dmasound.bass));
return TONE_DB_TO_VOXWARE(dmasound.bass);
}
static int AtaSetTreble(int treble)
{
dmasound.treble = TONE_VOXWARE_TO_DB(treble);
atari_microwire_cmd(MW_LM1992_TREBLE(dmasound.treble));
return TONE_DB_TO_VOXWARE(dmasound.treble);
}
/*
* TT
*/
static void TTSilence(void)
{
tt_dmasnd.ctrl = DMASND_CTRL_OFF;
atari_microwire_cmd(MW_LM1992_PSG_HIGH); /* mix in PSG signal 1:1 */
}
static void TTInit(void)
{
int mode, i, idx;
const int freq[4] = {50066, 25033, 12517, 6258};
/* search a frequency that fits into the allowed error range */
idx = -1;
for (i = 0; i < ARRAY_SIZE(freq); i++)
/* this isn't as much useful for a TT than for a Falcon, but
* then it doesn't hurt very much to implement it for a TT too.
*/
if ((100 * abs(dmasound.soft.speed - freq[i]) / freq[i]) < catchRadius)
idx = i;
if (idx > -1) {
dmasound.soft.speed = freq[idx];
dmasound.trans_write = &transTTNormal;
} else
dmasound.trans_write = &transTTExpanding;
TTSilence();
dmasound.hard = dmasound.soft;
if (dmasound.hard.speed > 50066) {
/* we would need to squeeze the sound, but we won't do that */
dmasound.hard.speed = 50066;
mode = DMASND_MODE_50KHZ;
dmasound.trans_write = &transTTNormal;
} else if (dmasound.hard.speed > 25033) {
dmasound.hard.speed = 50066;
mode = DMASND_MODE_50KHZ;
} else if (dmasound.hard.speed > 12517) {
dmasound.hard.speed = 25033;
mode = DMASND_MODE_25KHZ;
} else if (dmasound.hard.speed > 6258) {
dmasound.hard.speed = 12517;
mode = DMASND_MODE_12KHZ;
} else {
dmasound.hard.speed = 6258;
mode = DMASND_MODE_6KHZ;
}
tt_dmasnd.mode = (dmasound.hard.stereo ?
DMASND_MODE_STEREO : DMASND_MODE_MONO) |
DMASND_MODE_8BIT | mode;
expand_bal = -dmasound.soft.speed;
}
static int TTSetFormat(int format)
{
/* TT sound DMA supports only 8bit modes */
switch (format) {
case AFMT_QUERY:
return dmasound.soft.format;
case AFMT_MU_LAW:
case AFMT_A_LAW:
case AFMT_S8:
case AFMT_U8:
break;
default:
format = AFMT_S8;
}
dmasound.soft.format = format;
dmasound.soft.size = 8;
if (dmasound.minDev == SND_DEV_DSP) {
dmasound.dsp.format = format;
dmasound.dsp.size = 8;
}
TTInit();
return format;
}
#define VOLUME_VOXWARE_TO_DB(v) \
(((v) < 0) ? -40 : ((v) > 100) ? 0 : ((v) * 2) / 5 - 40)
#define VOLUME_DB_TO_VOXWARE(v) ((((v) + 40) * 5 + 1) / 2)
static int TTSetVolume(int volume)
{
dmasound.volume_left = VOLUME_VOXWARE_TO_DB(volume & 0xff);
atari_microwire_cmd(MW_LM1992_BALLEFT(dmasound.volume_left));
dmasound.volume_right = VOLUME_VOXWARE_TO_DB((volume & 0xff00) >> 8);
atari_microwire_cmd(MW_LM1992_BALRIGHT(dmasound.volume_right));
return VOLUME_DB_TO_VOXWARE(dmasound.volume_left) |
(VOLUME_DB_TO_VOXWARE(dmasound.volume_right) << 8);
}
#define GAIN_VOXWARE_TO_DB(v) \
(((v) < 0) ? -80 : ((v) > 100) ? 0 : ((v) * 4) / 5 - 80)
#define GAIN_DB_TO_VOXWARE(v) ((((v) + 80) * 5 + 1) / 4)
static int TTSetGain(int gain)
{
dmasound.gain = GAIN_VOXWARE_TO_DB(gain);
atari_microwire_cmd(MW_LM1992_VOLUME(dmasound.gain));
return GAIN_DB_TO_VOXWARE(dmasound.gain);
}
/*
* Falcon
*/
static void FalconSilence(void)
{
/* stop playback, set sample rate 50kHz for PSG sound */
tt_dmasnd.ctrl = DMASND_CTRL_OFF;
tt_dmasnd.mode = DMASND_MODE_50KHZ | DMASND_MODE_STEREO | DMASND_MODE_8BIT;
tt_dmasnd.int_div = 0; /* STE compatible divider */
tt_dmasnd.int_ctrl = 0x0;
tt_dmasnd.cbar_src = 0x0000; /* no matrix inputs */
tt_dmasnd.cbar_dst = 0x0000; /* no matrix outputs */
tt_dmasnd.dac_src = 1; /* connect ADC to DAC, disconnect matrix */
tt_dmasnd.adc_src = 3; /* ADC Input = PSG */
}
static void FalconInit(void)
{
int divider, i, idx;
const int freq[8] = {49170, 32780, 24585, 19668, 16390, 12292, 9834, 8195};
/* search a frequency that fits into the allowed error range */
idx = -1;
for (i = 0; i < ARRAY_SIZE(freq); i++)
/* if we will tolerate 3% error 8000Hz->8195Hz (2.38%) would
* be playable without expanding, but that now a kernel runtime
* option
*/
if ((100 * abs(dmasound.soft.speed - freq[i]) / freq[i]) < catchRadius)
idx = i;
if (idx > -1) {
dmasound.soft.speed = freq[idx];
dmasound.trans_write = &transFalconNormal;
} else
dmasound.trans_write = &transFalconExpanding;
FalconSilence();
dmasound.hard = dmasound.soft;
if (dmasound.hard.size == 16) {
/* the Falcon can play 16bit samples only in stereo */
dmasound.hard.stereo = 1;
}
if (dmasound.hard.speed > 49170) {
/* we would need to squeeze the sound, but we won't do that */
dmasound.hard.speed = 49170;
divider = 1;
dmasound.trans_write = &transFalconNormal;
} else if (dmasound.hard.speed > 32780) {
dmasound.hard.speed = 49170;
divider = 1;
} else if (dmasound.hard.speed > 24585) {
dmasound.hard.speed = 32780;
divider = 2;
} else if (dmasound.hard.speed > 19668) {
dmasound.hard.speed = 24585;
divider = 3;
} else if (dmasound.hard.speed > 16390) {
dmasound.hard.speed = 19668;
divider = 4;
} else if (dmasound.hard.speed > 12292) {
dmasound.hard.speed = 16390;
divider = 5;
} else if (dmasound.hard.speed > 9834) {
dmasound.hard.speed = 12292;
divider = 7;
} else if (dmasound.hard.speed > 8195) {
dmasound.hard.speed = 9834;
divider = 9;
} else {
dmasound.hard.speed = 8195;
divider = 11;
}
tt_dmasnd.int_div = divider;
/* Setup Falcon sound DMA for playback */
tt_dmasnd.int_ctrl = 0x4; /* Timer A int at play end */
tt_dmasnd.track_select = 0x0; /* play 1 track, track 1 */
tt_dmasnd.cbar_src = 0x0001; /* DMA(25MHz) --> DAC */
tt_dmasnd.cbar_dst = 0x0000;
tt_dmasnd.rec_track_select = 0;
tt_dmasnd.dac_src = 2; /* connect matrix to DAC */
tt_dmasnd.adc_src = 0; /* ADC Input = Mic */
tt_dmasnd.mode = (dmasound.hard.stereo ?
DMASND_MODE_STEREO : DMASND_MODE_MONO) |
((dmasound.hard.size == 8) ?
DMASND_MODE_8BIT : DMASND_MODE_16BIT) |
DMASND_MODE_6KHZ;
expand_bal = -dmasound.soft.speed;
}
static int FalconSetFormat(int format)
{
int size;
/* Falcon sound DMA supports 8bit and 16bit 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;
}
FalconInit();
return format;
}
/* This is for the Falcon output *attenuation* in 1.5dB steps,
* i.e. output level from 0 to -22.5dB in -1.5dB steps.
*/
#define VOLUME_VOXWARE_TO_ATT(v) \
((v) < 0 ? 15 : (v) > 100 ? 0 : 15 - (v) * 3 / 20)
#define VOLUME_ATT_TO_VOXWARE(v) (100 - (v) * 20 / 3)
static int FalconSetVolume(int volume)
{
dmasound.volume_left = VOLUME_VOXWARE_TO_ATT(volume & 0xff);
dmasound.volume_right = VOLUME_VOXWARE_TO_ATT((volume & 0xff00) >> 8);
tt_dmasnd.output_atten = dmasound.volume_left << 8 | dmasound.volume_right << 4;
return VOLUME_ATT_TO_VOXWARE(dmasound.volume_left) |
VOLUME_ATT_TO_VOXWARE(dmasound.volume_right) << 8;
}
static void AtaPlayNextFrame(int index)
{
char *start, *end;
/* used by AtaPlay() if all doubts whether there really is something
* to be played are already wiped out.
*/
start = write_sq.buffers[write_sq.front];
end = start+((write_sq.count == index) ? write_sq.rear_size
: write_sq.block_size);
/* end might not be a legal virtual address. */
DMASNDSetEnd(virt_to_phys(end - 1) + 1);
DMASNDSetBase(virt_to_phys(start));
/* Since only an even number of samples per frame can
be played, we might lose one byte here. (TO DO) */
write_sq.front = (write_sq.front+1) % write_sq.max_count;
write_sq.active++;
tt_dmasnd.ctrl = DMASND_CTRL_ON | DMASND_CTRL_REPEAT;
}
static void AtaPlay(void)
{
/* ++TeSche: Note that write_sq.active is no longer just a flag but
* holds the number of frames the DMA is currently programmed for
* instead, may be 0, 1 (currently being played) or 2 (pre-programmed).
*
* Changes done to write_sq.count and write_sq.active are a bit more
* subtle again so now I must admit I also prefer disabling the irq
* here rather than considering all possible situations. But the point
* is that disabling the irq doesn't have any bad influence on this
* version of the driver as we benefit from having pre-programmed the
* DMA wherever possible: There's no need to reload the DMA at the
* exact time of an interrupt but only at some time while the
* pre-programmed frame is playing!
*/
atari_disable_irq(IRQ_MFP_TIMA);
if (write_sq.active == 2 || /* DMA is 'full' */
write_sq.count <= 0) { /* nothing to do */
atari_enable_irq(IRQ_MFP_TIMA);
return;
}
if (write_sq.active == 0) {
/* looks like there's nothing 'in' the DMA yet, so try
* to put two frames into it (at least one is available).
*/
if (write_sq.count == 1 &&
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?
*/
atari_enable_irq(IRQ_MFP_TIMA);
return;
}
AtaPlayNextFrame(1);
if (write_sq.count == 1) {
/* no more frames */
atari_enable_irq(IRQ_MFP_TIMA);
return;
}
if (write_sq.count == 2 &&
write_sq.rear_size < write_sq.block_size &&
!write_sq.syncing) {
/* hmmm, there were two frames, but the second
* one is not yet filled and we're not syncing?
*/
atari_enable_irq(IRQ_MFP_TIMA);
return;
}
AtaPlayNextFrame(2);
} else {
/* there's already a frame being played so we may only stuff
* one new into the DMA, but even if this may be the last
* frame existing the previous one is still on write_sq.count.
*/
if (write_sq.count == 2 &&
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?
*/
atari_enable_irq(IRQ_MFP_TIMA);
return;
}
AtaPlayNextFrame(2);
}
atari_enable_irq(IRQ_MFP_TIMA);
}
static irqreturn_t AtaInterrupt(int irq, void *dummy)
{
#if 0
/* ++TeSche: if you should want to test this... */
static int cnt;
if (write_sq.active == 2)
if (++cnt == 10) {
/* simulate losing an interrupt */
cnt = 0;
return IRQ_HANDLED;
}
#endif
spin_lock(&dmasound.lock);
if (write_sq_ignore_int && is_falcon) {
/* ++TeSche: Falcon only: ignore first irq because it comes
* immediately after starting a frame. after that, irqs come
* (almost) like on the TT.
*/
write_sq_ignore_int = 0;
return IRQ_HANDLED;
}
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;
}
/* Probably ;) one frame is finished. Well, in fact it may be that a
* pre-programmed one is also finished because there has been a long
* delay in interrupt delivery and we've completely lost one, but
* there's no way to detect such a situation. In such a case the last
* frame will be played more than once and the situation will recover
* as soon as the irq gets through.
*/
write_sq.count--;
write_sq.active--;
if (!write_sq.active) {
tt_dmasnd.ctrl = DMASND_CTRL_OFF;
write_sq_ignore_int = 1;
}
WAKE_UP(write_sq.action_queue);
/* At least one block of the queue is free now
so wake up a writing process blocked because
of a full queue. */
if ((write_sq.active != 1) || (write_sq.count != 1))
/* We must be a bit carefully here: write_sq.count indicates the
* number of buffers used and not the number of frames to be
* played. If write_sq.count==1 and write_sq.active==1 that
* means the only remaining frame was already programmed
* earlier (and is currently running) so we mustn't call
* AtaPlay() here, otherwise we'll play one frame too much.
*/
AtaPlay();
if (!write_sq.active) WAKE_UP(write_sq.sync_queue);
/* We are not playing after AtaPlay(), so there
is nothing to play any more. Wake up a process
waiting for audio output to drain. */
spin_unlock(&dmasound.lock);
return IRQ_HANDLED;
}
/*** Mid level stuff *********************************************************/
/*
* /dev/mixer abstraction
*/
#define RECLEVEL_VOXWARE_TO_GAIN(v) \
((v) < 0 ? 0 : (v) > 100 ? 15 : (v) * 3 / 20)
#define RECLEVEL_GAIN_TO_VOXWARE(v) (((v) * 20 + 2) / 3)
static void __init TTMixerInit(void)
{
atari_microwire_cmd(MW_LM1992_VOLUME(0));
dmasound.volume_left = 0;
atari_microwire_cmd(MW_LM1992_BALLEFT(0));
dmasound.volume_right = 0;
atari_microwire_cmd(MW_LM1992_BALRIGHT(0));
atari_microwire_cmd(MW_LM1992_TREBLE(0));
atari_microwire_cmd(MW_LM1992_BASS(0));
}
static void __init FalconMixerInit(void)
{
dmasound.volume_left = (tt_dmasnd.output_atten & 0xf00) >> 8;
dmasound.volume_right = (tt_dmasnd.output_atten & 0xf0) >> 4;
}
static int AtaMixerIoctl(u_int cmd, u_long arg)
{
int data;
unsigned long flags;
switch (cmd) {
case SOUND_MIXER_READ_SPEAKER:
if (is_falcon || MACH_IS_TT) {
int porta;
spin_lock_irqsave(&dmasound.lock, flags);
sound_ym.rd_data_reg_sel = 14;
porta = sound_ym.rd_data_reg_sel;
spin_unlock_irqrestore(&dmasound.lock, flags);
return IOCTL_OUT(arg, porta & 0x40 ? 0 : 100);
}
break;
case SOUND_MIXER_WRITE_VOLUME:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_volume(data));
case SOUND_MIXER_WRITE_SPEAKER:
if (is_falcon || MACH_IS_TT) {
int porta;
IOCTL_IN(arg, data);
spin_lock_irqsave(&dmasound.lock, flags);
sound_ym.rd_data_reg_sel = 14;
porta = (sound_ym.rd_data_reg_sel & ~0x40) |
(data < 50 ? 0x40 : 0);
sound_ym.wd_data = porta;
spin_unlock_irqrestore(&dmasound.lock, flags);
return IOCTL_OUT(arg, porta & 0x40 ? 0 : 100);
}
}
return -EINVAL;
}
static int TTMixerIoctl(u_int cmd, u_long arg)
{
int data;
switch (cmd) {
case SOUND_MIXER_READ_RECMASK:
return IOCTL_OUT(arg, 0);
case SOUND_MIXER_READ_DEVMASK:
return IOCTL_OUT(arg,
SOUND_MASK_VOLUME | SOUND_MASK_TREBLE | SOUND_MASK_BASS |
(MACH_IS_TT ? SOUND_MASK_SPEAKER : 0));
case SOUND_MIXER_READ_STEREODEVS:
return IOCTL_OUT(arg, SOUND_MASK_VOLUME);
case SOUND_MIXER_READ_VOLUME:
return IOCTL_OUT(arg,
VOLUME_DB_TO_VOXWARE(dmasound.volume_left) |
(VOLUME_DB_TO_VOXWARE(dmasound.volume_right) << 8));
case SOUND_MIXER_READ_BASS:
return IOCTL_OUT(arg, TONE_DB_TO_VOXWARE(dmasound.bass));
case SOUND_MIXER_READ_TREBLE:
return IOCTL_OUT(arg, TONE_DB_TO_VOXWARE(dmasound.treble));
case SOUND_MIXER_READ_OGAIN:
return IOCTL_OUT(arg, GAIN_DB_TO_VOXWARE(dmasound.gain));
case SOUND_MIXER_WRITE_BASS:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_bass(data));
case SOUND_MIXER_WRITE_TREBLE:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_treble(data));
case SOUND_MIXER_WRITE_OGAIN:
IOCTL_IN(arg, data);
return IOCTL_OUT(arg, dmasound_set_gain(data));
}
return AtaMixerIoctl(cmd, arg);
}
static int FalconMixerIoctl(u_int cmd, u_long arg)
{
int data;
switch (cmd) {
case SOUND_MIXER_READ_RECMASK:
return IOCTL_OUT(arg, SOUND_MASK_MIC);
case SOUND_MIXER_READ_DEVMASK:
return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_MIC | SOUND_MASK_SPEAKER);
case SOUND_MIXER_READ_STEREODEVS:
return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_MIC);
case SOUND_MIXER_READ_VOLUME:
return IOCTL_OUT(arg,
VOLUME_ATT_TO_VOXWARE(dmasound.volume_left) |
VOLUME_ATT_TO_VOXWARE(dmasound.volume_right) << 8);
case SOUND_MIXER_READ_CAPS:
return IOCTL_OUT(arg, SOUND_CAP_EXCL_INPUT);
case SOUND_MIXER_WRITE_MIC:
IOCTL_IN(arg, data);
tt_dmasnd.input_gain =
RECLEVEL_VOXWARE_TO_GAIN(data & 0xff) << 4 |
RECLEVEL_VOXWARE_TO_GAIN(data >> 8 & 0xff);
/* fall thru, return set value */
case SOUND_MIXER_READ_MIC:
return IOCTL_OUT(arg,
RECLEVEL_GAIN_TO_VOXWARE(tt_dmasnd.input_gain >> 4 & 0xf) |
RECLEVEL_GAIN_TO_VOXWARE(tt_dmasnd.input_gain & 0xf) << 8);
}
return AtaMixerIoctl(cmd, arg);
}
static int AtaWriteSqSetup(void)
{
write_sq_ignore_int = 0;
return 0 ;
}
static int AtaSqOpen(mode_t mode)
{
write_sq_ignore_int = 1;
return 0 ;
}
static int TTStateInfo(char *buffer, size_t space)
{
int len = 0;
len += sprintf(buffer+len, "\tvol left %ddB [-40... 0]\n",
dmasound.volume_left);
len += sprintf(buffer+len, "\tvol right %ddB [-40... 0]\n",
dmasound.volume_right);
len += sprintf(buffer+len, "\tbass %ddB [-12...+12]\n",
dmasound.bass);
len += sprintf(buffer+len, "\ttreble %ddB [-12...+12]\n",
dmasound.treble);
if (len >= space) {
printk(KERN_ERR "dmasound_atari: overflowed state buffer alloc.\n") ;
len = space ;
}
return len;
}
static int FalconStateInfo(char *buffer, size_t space)
{
int len = 0;
len += sprintf(buffer+len, "\tvol left %ddB [-22.5 ... 0]\n",
dmasound.volume_left);
len += sprintf(buffer+len, "\tvol right %ddB [-22.5 ... 0]\n",
dmasound.volume_right);
if (len >= space) {
printk(KERN_ERR "dmasound_atari: overflowed state buffer alloc.\n") ;
len = space ;
}
return len;
}
/*** Machine definitions *****************************************************/
static SETTINGS def_hard_falcon = {
.format = AFMT_S8,
.stereo = 0,
.size = 8,
.speed = 8195
} ;
static SETTINGS def_hard_tt = {
.format = AFMT_S8,
.stereo = 0,
.size = 8,
.speed = 12517
} ;
static SETTINGS def_soft = {
.format = AFMT_U8,
.stereo = 0,
.size = 8,
.speed = 8000
} ;
static MACHINE machTT = {
.name = "Atari",
.name2 = "TT",
.owner = THIS_MODULE,
.dma_alloc = AtaAlloc,
.dma_free = AtaFree,
.irqinit = AtaIrqInit,
#ifdef MODULE
.irqcleanup = AtaIrqCleanUp,
#endif /* MODULE */
.init = TTInit,
.silence = TTSilence,
.setFormat = TTSetFormat,
.setVolume = TTSetVolume,
.setBass = AtaSetBass,
.setTreble = AtaSetTreble,
.setGain = TTSetGain,
.play = AtaPlay,
.mixer_init = TTMixerInit,
.mixer_ioctl = TTMixerIoctl,
.write_sq_setup = AtaWriteSqSetup,
.sq_open = AtaSqOpen,
.state_info = TTStateInfo,
.min_dsp_speed = 6258,
.version = ((DMASOUND_ATARI_REVISION<<8) | DMASOUND_ATARI_EDITION),
.hardware_afmts = AFMT_S8, /* h'ware-supported formats *only* here */
.capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */
};
static MACHINE machFalcon = {
.name = "Atari",
.name2 = "FALCON",
.dma_alloc = AtaAlloc,
.dma_free = AtaFree,
.irqinit = AtaIrqInit,
#ifdef MODULE
.irqcleanup = AtaIrqCleanUp,
#endif /* MODULE */
.init = FalconInit,
.silence = FalconSilence,
.setFormat = FalconSetFormat,
.setVolume = FalconSetVolume,
.setBass = AtaSetBass,
.setTreble = AtaSetTreble,
.play = AtaPlay,
.mixer_init = FalconMixerInit,
.mixer_ioctl = FalconMixerIoctl,
.write_sq_setup = AtaWriteSqSetup,
.sq_open = AtaSqOpen,
.state_info = FalconStateInfo,
.min_dsp_speed = 8195,
.version = ((DMASOUND_ATARI_REVISION<<8) | DMASOUND_ATARI_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 dmasound_atari_init(void)
{
if (MACH_IS_ATARI && ATARIHW_PRESENT(PCM_8BIT)) {
if (ATARIHW_PRESENT(CODEC)) {
dmasound.mach = machFalcon;
dmasound.mach.default_soft = def_soft ;
dmasound.mach.default_hard = def_hard_falcon ;
is_falcon = 1;
} else if (ATARIHW_PRESENT(MICROWIRE)) {
dmasound.mach = machTT;
dmasound.mach.default_soft = def_soft ;
dmasound.mach.default_hard = def_hard_tt ;
is_falcon = 0;
} else
return -ENODEV;
if ((mfp.int_en_a & mfp.int_mk_a & 0x20) == 0)
return dmasound_init();
else {
printk("DMA sound driver: Timer A interrupt already in use\n");
return -EBUSY;
}
}
return -ENODEV;
}
static void __exit dmasound_atari_cleanup(void)
{
dmasound_deinit();
}
module_init(dmasound_atari_init);
module_exit(dmasound_atari_cleanup);
MODULE_LICENSE("GPL");
View Git Blame Copy Permalink