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linux/include/sound/sb.h
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

367 lines
11 KiB
C
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#ifndef __SOUND_SB_H
#define __SOUND_SB_H
/*
* Header file for SoundBlaster cards
* Copyright (c) by Jaroslav Kysela <perex@suse.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 "pcm.h"
#include "rawmidi.h"
#include <linux/interrupt.h>
#include <asm/io.h>
enum sb_hw_type {
SB_HW_AUTO,
SB_HW_10,
SB_HW_20,
SB_HW_201,
SB_HW_PRO,
SB_HW_16,
SB_HW_16CSP, /* SB16 with CSP chip */
SB_HW_ALS100, /* Avance Logic ALS100 chip */
SB_HW_ALS4000, /* Avance Logic ALS4000 chip */
SB_HW_DT019X, /* Diamond Tech. DT-019X / Avance Logic ALS-007 */
};
#define SB_OPEN_PCM 0x01
#define SB_OPEN_MIDI_INPUT 0x02
#define SB_OPEN_MIDI_OUTPUT 0x04
#define SB_OPEN_MIDI_INPUT_TRIGGER 0x08
#define SB_OPEN_MIDI_OUTPUT_TRIGGER 0x10
#define SB_MODE_HALT 0x00
#define SB_MODE_PLAYBACK_8 0x01
#define SB_MODE_PLAYBACK_16 0x02
#define SB_MODE_PLAYBACK (SB_MODE_PLAYBACK_8 | SB_MODE_PLAYBACK_16)
#define SB_MODE_CAPTURE_8 0x04
#define SB_MODE_CAPTURE_16 0x08
#define SB_MODE_CAPTURE (SB_MODE_CAPTURE_8 | SB_MODE_CAPTURE_16)
#define SB_RATE_LOCK_PLAYBACK 0x10
#define SB_RATE_LOCK_CAPTURE 0x20
#define SB_RATE_LOCK (SB_RATE_LOCK_PLAYBACK | SB_RATE_LOCK_CAPTURE)
#define SB_MPU_INPUT 1
struct snd_sb {
unsigned long port; /* base port of DSP chip */
struct resource *res_port;
unsigned long mpu_port; /* MPU port for SB DSP 4.0+ */
int irq; /* IRQ number of DSP chip */
int dma8; /* 8-bit DMA */
int dma16; /* 16-bit DMA */
unsigned short version; /* version of DSP chip */
enum sb_hw_type hardware; /* see to SB_HW_XXXX */
unsigned long alt_port; /* alternate port (ALS4000) */
struct pci_dev *pci; /* ALS4000 */
unsigned int open; /* see to SB_OPEN_XXXX for sb8 */
/* also SNDRV_SB_CSP_MODE_XXX for sb16_csp */
unsigned int mode; /* current mode of stream */
unsigned int force_mode16; /* force 16-bit mode of streams */
unsigned int locked_rate; /* sb16 duplex */
unsigned int playback_format;
unsigned int capture_format;
struct timer_list midi_timer;
unsigned int p_dma_size;
unsigned int p_period_size;
unsigned int c_dma_size;
unsigned int c_period_size;
spinlock_t mixer_lock;
char name[32];
void *csp; /* used only when CONFIG_SND_SB16_CSP is set */
struct snd_card *card;
struct snd_pcm *pcm;
struct snd_pcm_substream *playback_substream;
struct snd_pcm_substream *capture_substream;
struct snd_rawmidi *rmidi;
struct snd_rawmidi_substream *midi_substream_input;
struct snd_rawmidi_substream *midi_substream_output;
irq_handler_t rmidi_callback;
spinlock_t reg_lock;
spinlock_t open_lock;
spinlock_t midi_input_lock;
struct snd_info_entry *proc_entry;
#ifdef CONFIG_PM
unsigned char saved_regs[0x20];
#endif
};
/* I/O ports */
#define SBP(chip, x) ((chip)->port + s_b_SB_##x)
#define SBP1(port, x) ((port) + s_b_SB_##x)
#define s_b_SB_RESET 0x6
#define s_b_SB_READ 0xa
#define s_b_SB_WRITE 0xc
#define s_b_SB_COMMAND 0xc
#define s_b_SB_STATUS 0xc
#define s_b_SB_DATA_AVAIL 0xe
#define s_b_SB_DATA_AVAIL_16 0xf
#define s_b_SB_MIXER_ADDR 0x4
#define s_b_SB_MIXER_DATA 0x5
#define s_b_SB_OPL3_LEFT 0x0
#define s_b_SB_OPL3_RIGHT 0x2
#define s_b_SB_OPL3_BOTH 0x8
#define SB_DSP_OUTPUT 0x14
#define SB_DSP_INPUT 0x24
#define SB_DSP_BLOCK_SIZE 0x48
#define SB_DSP_HI_OUTPUT 0x91
#define SB_DSP_HI_INPUT 0x99
#define SB_DSP_LO_OUTPUT_AUTO 0x1c
#define SB_DSP_LO_INPUT_AUTO 0x2c
#define SB_DSP_HI_OUTPUT_AUTO 0x90
#define SB_DSP_HI_INPUT_AUTO 0x98
#define SB_DSP_IMMED_INT 0xf2
#define SB_DSP_GET_VERSION 0xe1
#define SB_DSP_SPEAKER_ON 0xd1
#define SB_DSP_SPEAKER_OFF 0xd3
#define SB_DSP_DMA8_OFF 0xd0
#define SB_DSP_DMA8_ON 0xd4
#define SB_DSP_DMA8_EXIT 0xda
#define SB_DSP_DMA16_OFF 0xd5
#define SB_DSP_DMA16_ON 0xd6
#define SB_DSP_DMA16_EXIT 0xd9
#define SB_DSP_SAMPLE_RATE 0x40
#define SB_DSP_SAMPLE_RATE_OUT 0x41
#define SB_DSP_SAMPLE_RATE_IN 0x42
#define SB_DSP_MONO_8BIT 0xa0
#define SB_DSP_MONO_16BIT 0xa4
#define SB_DSP_STEREO_8BIT 0xa8
#define SB_DSP_STEREO_16BIT 0xac
#define SB_DSP_MIDI_INPUT_IRQ 0x31
#define SB_DSP_MIDI_UART_IRQ 0x35
#define SB_DSP_MIDI_OUTPUT 0x38
#define SB_DSP4_OUT8_AI 0xc6
#define SB_DSP4_IN8_AI 0xce
#define SB_DSP4_OUT16_AI 0xb6
#define SB_DSP4_IN16_AI 0xbe
#define SB_DSP4_MODE_UNS_MONO 0x00
#define SB_DSP4_MODE_SIGN_MONO 0x10
#define SB_DSP4_MODE_UNS_STEREO 0x20
#define SB_DSP4_MODE_SIGN_STEREO 0x30
#define SB_DSP4_OUTPUT 0x3c
#define SB_DSP4_INPUT_LEFT 0x3d
#define SB_DSP4_INPUT_RIGHT 0x3e
/* registers for SB 2.0 mixer */
#define SB_DSP20_MASTER_DEV 0x02
#define SB_DSP20_PCM_DEV 0x0A
#define SB_DSP20_CD_DEV 0x08
#define SB_DSP20_FM_DEV 0x06
/* registers for SB PRO mixer */
#define SB_DSP_MASTER_DEV 0x22
#define SB_DSP_PCM_DEV 0x04
#define SB_DSP_LINE_DEV 0x2e
#define SB_DSP_CD_DEV 0x28
#define SB_DSP_FM_DEV 0x26
#define SB_DSP_MIC_DEV 0x0a
#define SB_DSP_CAPTURE_SOURCE 0x0c
#define SB_DSP_CAPTURE_FILT 0x0c
#define SB_DSP_PLAYBACK_FILT 0x0e
#define SB_DSP_STEREO_SW 0x0e
#define SB_DSP_MIXS_MIC0 0x00 /* same as MIC */
#define SB_DSP_MIXS_CD 0x01
#define SB_DSP_MIXS_MIC 0x02
#define SB_DSP_MIXS_LINE 0x03
/* registers (only for left channel) for SB 16 mixer */
#define SB_DSP4_MASTER_DEV 0x30
#define SB_DSP4_BASS_DEV 0x46
#define SB_DSP4_TREBLE_DEV 0x44
#define SB_DSP4_SYNTH_DEV 0x34
#define SB_DSP4_PCM_DEV 0x32
#define SB_DSP4_SPEAKER_DEV 0x3b
#define SB_DSP4_LINE_DEV 0x38
#define SB_DSP4_MIC_DEV 0x3a
#define SB_DSP4_OUTPUT_SW 0x3c
#define SB_DSP4_CD_DEV 0x36
#define SB_DSP4_IGAIN_DEV 0x3f
#define SB_DSP4_OGAIN_DEV 0x41
#define SB_DSP4_MIC_AGC 0x43
/* additional registers for SB 16 mixer */
#define SB_DSP4_IRQSETUP 0x80
#define SB_DSP4_DMASETUP 0x81
#define SB_DSP4_IRQSTATUS 0x82
#define SB_DSP4_MPUSETUP 0x84
#define SB_DSP4_3DSE 0x90
/* Registers for DT-019x / ALS-007 mixer */
#define SB_DT019X_MASTER_DEV 0x62
#define SB_DT019X_PCM_DEV 0x64
#define SB_DT019X_SYNTH_DEV 0x66
#define SB_DT019X_CD_DEV 0x68
#define SB_DT019X_MIC_DEV 0x6a
#define SB_DT019X_SPKR_DEV 0x6a
#define SB_DT019X_LINE_DEV 0x6e
#define SB_DT019X_OUTPUT_SW2 0x4c
#define SB_DT019X_CAPTURE_SW 0x6c
#define SB_DT019X_CAP_CD 0x02
#define SB_DT019X_CAP_MIC 0x04
#define SB_DT019X_CAP_LINE 0x06
#define SB_DT019X_CAP_SYNTH 0x07
#define SB_DT019X_CAP_MAIN 0x07
#define SB_ALS4000_MONO_IO_CTRL 0x4b
#define SB_ALS4000_MIC_IN_GAIN 0x4d
#define SB_ALS4000_FMDAC 0x4f
#define SB_ALS4000_3D_SND_FX 0x50
#define SB_ALS4000_3D_TIME_DELAY 0x51
#define SB_ALS4000_3D_AUTO_MUTE 0x52
#define SB_ALS4000_QSOUND 0xdb
/* IRQ setting bitmap */
#define SB_IRQSETUP_IRQ9 0x01
#define SB_IRQSETUP_IRQ5 0x02
#define SB_IRQSETUP_IRQ7 0x04
#define SB_IRQSETUP_IRQ10 0x08
/* IRQ types */
#define SB_IRQTYPE_8BIT 0x01
#define SB_IRQTYPE_16BIT 0x02
#define SB_IRQTYPE_MPUIN 0x04
/* DMA setting bitmap */
#define SB_DMASETUP_DMA0 0x01
#define SB_DMASETUP_DMA1 0x02
#define SB_DMASETUP_DMA3 0x08
#define SB_DMASETUP_DMA5 0x20
#define SB_DMASETUP_DMA6 0x40
#define SB_DMASETUP_DMA7 0x80
/*
*
*/
static inline void snd_sb_ack_8bit(struct snd_sb *chip)
{
inb(SBP(chip, DATA_AVAIL));
}
static inline void snd_sb_ack_16bit(struct snd_sb *chip)
{
inb(SBP(chip, DATA_AVAIL_16));
}
/* sb_common.c */
int snd_sbdsp_command(struct snd_sb *chip, unsigned char val);
int snd_sbdsp_get_byte(struct snd_sb *chip);
int snd_sbdsp_reset(struct snd_sb *chip);
int snd_sbdsp_create(struct snd_card *card,
unsigned long port,
int irq,
irq_handler_t irq_handler,
int dma8, int dma16,
unsigned short hardware,
struct snd_sb **r_chip);
/* sb_mixer.c */
void snd_sbmixer_write(struct snd_sb *chip, unsigned char reg, unsigned char data);
unsigned char snd_sbmixer_read(struct snd_sb *chip, unsigned char reg);
int snd_sbmixer_new(struct snd_sb *chip);
#ifdef CONFIG_PM
void snd_sbmixer_suspend(struct snd_sb *chip);
void snd_sbmixer_resume(struct snd_sb *chip);
#endif
/* sb8_init.c */
int snd_sb8dsp_pcm(struct snd_sb *chip, int device, struct snd_pcm ** rpcm);
/* sb8.c */
irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip);
int snd_sb8_playback_open(struct snd_pcm_substream *substream);
int snd_sb8_capture_open(struct snd_pcm_substream *substream);
int snd_sb8_playback_close(struct snd_pcm_substream *substream);
int snd_sb8_capture_close(struct snd_pcm_substream *substream);
/* midi8.c */
irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb *chip);
int snd_sb8dsp_midi(struct snd_sb *chip, int device, struct snd_rawmidi ** rrawmidi);
/* sb16_init.c */
int snd_sb16dsp_pcm(struct snd_sb *chip, int device, struct snd_pcm ** rpcm);
const struct snd_pcm_ops *snd_sb16dsp_get_pcm_ops(int direction);
int snd_sb16dsp_configure(struct snd_sb *chip);
/* sb16.c */
irqreturn_t snd_sb16dsp_interrupt(int irq, void *dev_id);
/* exported mixer stuffs */
enum {
SB_MIX_SINGLE,
SB_MIX_DOUBLE,
SB_MIX_INPUT_SW,
SB_MIX_CAPTURE_PRO,
SB_MIX_CAPTURE_DT019X
};
#define SB_MIXVAL_DOUBLE(left_reg, right_reg, left_shift, right_shift, mask) \
((left_reg) | ((right_reg) << 8) | ((left_shift) << 16) | ((right_shift) << 19) | ((mask) << 24))
#define SB_MIXVAL_SINGLE(reg, shift, mask) \
((reg) | ((shift) << 16) | ((mask) << 24))
#define SB_MIXVAL_INPUT_SW(reg1, reg2, left_shift, right_shift) \
((reg1) | ((reg2) << 8) | ((left_shift) << 16) | ((right_shift) << 24))
int snd_sbmixer_add_ctl(struct snd_sb *chip, const char *name, int index, int type, unsigned long value);
/* for ease of use */
struct sbmix_elem {
const char *name;
int type;
unsigned long private_value;
};
#define SB_SINGLE(xname, reg, shift, mask) \
{ .name = xname, \
.type = SB_MIX_SINGLE, \
.private_value = SB_MIXVAL_SINGLE(reg, shift, mask) }
#define SB_DOUBLE(xname, left_reg, right_reg, left_shift, right_shift, mask) \
{ .name = xname, \
.type = SB_MIX_DOUBLE, \
.private_value = SB_MIXVAL_DOUBLE(left_reg, right_reg, left_shift, right_shift, mask) }
#define SB16_INPUT_SW(xname, reg1, reg2, left_shift, right_shift) \
{ .name = xname, \
.type = SB_MIX_INPUT_SW, \
.private_value = SB_MIXVAL_INPUT_SW(reg1, reg2, left_shift, right_shift) }
static inline int snd_sbmixer_add_ctl_elem(struct snd_sb *chip, const struct sbmix_elem *c)
{
return snd_sbmixer_add_ctl(chip, c->name, 0, c->type, c->private_value);
}
#endif /* __SOUND_SB_H */
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