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linux-pinenote/sound/oss/pas2_card.c
Asim Kadav dc30a43690 sound: oss/pas2: Fix possible access out of array 
Added a fix for hardware dependence bug where a sound card failure
should not result in reading beyond array memory index.

Signed-off-by: Asim Kadav <kadav@cs.wisc.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-01-04 10:38:27 +01:00

460 lines
9.5 KiB
C
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/*
* sound/oss/pas2_card.c
*
* Detection routine for the Pro Audio Spectrum cards.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include "sound_config.h"
#include "pas2.h"
#include "sb.h"
static unsigned char dma_bits[] = {
4, 1, 2, 3, 0, 5, 6, 7
};
static unsigned char irq_bits[] = {
0, 0, 1, 2, 3, 4, 5, 6, 0, 1, 7, 8, 9, 0, 10, 11
};
static unsigned char sb_irq_bits[] = {
0x00, 0x00, 0x08, 0x10, 0x00, 0x18, 0x00, 0x20,
0x00, 0x08, 0x28, 0x30, 0x38, 0, 0
};
static unsigned char sb_dma_bits[] = {
0x00, 0x40, 0x80, 0xC0, 0, 0, 0, 0
};
/*
* The Address Translation code is used to convert I/O register addresses to
* be relative to the given base -register
*/
int pas_translate_code = 0;
static int pas_intr_mask;
static int pas_irq;
static int pas_sb_base;
DEFINE_SPINLOCK(pas_lock);
#ifndef CONFIG_PAS_JOYSTICK
static bool joystick;
#else
static bool joystick = 1;
#endif
#ifdef SYMPHONY_PAS
static bool symphony = 1;
#else
static bool symphony;
#endif
#ifdef BROKEN_BUS_CLOCK
static bool broken_bus_clock = 1;
#else
static bool broken_bus_clock;
#endif
static struct address_info cfg;
static struct address_info cfg2;
char pas_model = 0;
static char *pas_model_names[] = {
"",
"Pro AudioSpectrum+",
"CDPC",
"Pro AudioSpectrum 16",
"Pro AudioSpectrum 16D"
};
/*
* pas_read() and pas_write() are equivalents of inb and outb
* These routines perform the I/O address translation required
* to support other than the default base address
*/
extern void mix_write(unsigned char data, int ioaddr);
unsigned char pas_read(int ioaddr)
{
return inb(ioaddr + pas_translate_code);
}
void pas_write(unsigned char data, int ioaddr)
{
outb((data), ioaddr + pas_translate_code);
}
/******************* Begin of the Interrupt Handler ********************/
static irqreturn_t pasintr(int irq, void *dev_id)
{
int status;
status = pas_read(0x0B89);
pas_write(status, 0x0B89); /* Clear interrupt */
if (status & 0x08)
{
pas_pcm_interrupt(status, 1);
status &= ~0x08;
}
if (status & 0x10)
{
pas_midi_interrupt();
status &= ~0x10;
}
return IRQ_HANDLED;
}
int pas_set_intr(int mask)
{
if (!mask)
return 0;
pas_intr_mask |= mask;
pas_write(pas_intr_mask, 0x0B8B);
return 0;
}
int pas_remove_intr(int mask)
{
if (!mask)
return 0;
pas_intr_mask &= ~mask;
pas_write(pas_intr_mask, 0x0B8B);
return 0;
}
/******************* End of the Interrupt handler **********************/
/******************* Begin of the Initialization Code ******************/
static int __init config_pas_hw(struct address_info *hw_config)
{
char ok = 1;
unsigned int_ptrs; /* scsi/sound interrupt pointers */
pas_irq = hw_config->irq;
pas_write(0x00, 0x0B8B);
pas_write(0x36, 0x138B);
pas_write(0x36, 0x1388);
pas_write(0, 0x1388);
pas_write(0x74, 0x138B);
pas_write(0x74, 0x1389);
pas_write(0, 0x1389);
pas_write(0x80 | 0x40 | 0x20 | 1, 0x0B8A);
pas_write(0x80 | 0x20 | 0x10 | 0x08 | 0x01, 0xF8A);
pas_write(0x01 | 0x02 | 0x04 | 0x10 /*
* |
* 0x80
*/ , 0xB88);
pas_write(0x80 | (joystick ? 0x40 : 0), 0xF388);
if (pas_irq < 0 || pas_irq > 15)
{
printk(KERN_ERR "PAS16: Invalid IRQ %d", pas_irq);
hw_config->irq=-1;
ok = 0;
}
else
{
int_ptrs = pas_read(0xF38A);
int_ptrs = (int_ptrs & 0xf0) | irq_bits[pas_irq];
pas_write(int_ptrs, 0xF38A);
if (!irq_bits[pas_irq])
{
printk(KERN_ERR "PAS16: Invalid IRQ %d", pas_irq);
hw_config->irq=-1;
ok = 0;
}
else
{
if (request_irq(pas_irq, pasintr, 0, "PAS16",hw_config) < 0) {
printk(KERN_ERR "PAS16: Cannot allocate IRQ %d\n",pas_irq);
hw_config->irq=-1;
ok = 0;
}
}
}
if (hw_config->dma < 0 || hw_config->dma > 7)
{
printk(KERN_ERR "PAS16: Invalid DMA selection %d", hw_config->dma);
hw_config->dma=-1;
ok = 0;
}
else
{
pas_write(dma_bits[hw_config->dma], 0xF389);
if (!dma_bits[hw_config->dma])
{
printk(KERN_ERR "PAS16: Invalid DMA selection %d", hw_config->dma);
hw_config->dma=-1;
ok = 0;
}
else
{
if (sound_alloc_dma(hw_config->dma, "PAS16"))
{
printk(KERN_ERR "pas2_card.c: Can't allocate DMA channel\n");
hw_config->dma=-1;
ok = 0;
}
}
}
/*
* This fixes the timing problems of the PAS due to the Symphony chipset
* as per Media Vision. Only define this if your PAS doesn't work correctly.
*/
if(symphony)
{
outb((0x05), 0xa8);
outb((0x60), 0xa9);
}
if(broken_bus_clock)
pas_write(0x01 | 0x10 | 0x20 | 0x04, 0x8388);
else
/*
* pas_write(0x01, 0x8388);
*/
pas_write(0x01 | 0x10 | 0x20, 0x8388);
pas_write(0x18, 0x838A); /* ??? */
pas_write(0x20 | 0x01, 0x0B8A); /* Mute off, filter = 17.897 kHz */
pas_write(8, 0xBF8A);
mix_write(0x80 | 5, 0x078B);
mix_write(5, 0x078B);
{
struct address_info *sb_config;
sb_config = &cfg2;
if (sb_config->io_base)
{
unsigned char irq_dma;
/*
* Turn on Sound Blaster compatibility
* bit 1 = SB emulation
* bit 0 = MPU401 emulation (CDPC only :-( )
*/
pas_write(0x02, 0xF788);
/*
* "Emulation address"
*/
pas_write((sb_config->io_base >> 4) & 0x0f, 0xF789);
pas_sb_base = sb_config->io_base;
if (!sb_dma_bits[sb_config->dma])
printk(KERN_ERR "PAS16 Warning: Invalid SB DMA %d\n\n", sb_config->dma);
if (!sb_irq_bits[sb_config->irq])
printk(KERN_ERR "PAS16 Warning: Invalid SB IRQ %d\n\n", sb_config->irq);
irq_dma = sb_dma_bits[sb_config->dma] |
sb_irq_bits[sb_config->irq];
pas_write(irq_dma, 0xFB8A);
}
else
pas_write(0x00, 0xF788);
}
if (!ok)
printk(KERN_WARNING "PAS16: Driver not enabled\n");
return ok;
}
static int __init detect_pas_hw(struct address_info *hw_config)
{
unsigned char board_id, foo;
/*
* WARNING: Setting an option like W:1 or so that disables warm boot reset
* of the card will screw up this detect code something fierce. Adding code
* to handle this means possibly interfering with other cards on the bus if
* you have something on base port 0x388. SO be forewarned.
*/
outb((0xBC), 0x9A01); /* Activate first board */
outb((hw_config->io_base >> 2), 0x9A01); /* Set base address */
pas_translate_code = hw_config->io_base - 0x388;
pas_write(1, 0xBF88); /* Select one wait states */
board_id = pas_read(0x0B8B);
if (board_id == 0xff)
return 0;
/*
* We probably have a PAS-series board, now check for a PAS16-series board
* by trying to change the board revision bits. PAS16-series hardware won't
* let you do this - the bits are read-only.
*/
foo = board_id ^ 0xe0;
pas_write(foo, 0x0B8B);
foo = pas_read(0x0B8B);
pas_write(board_id, 0x0B8B);
if (board_id != foo)
return 0;
pas_model = pas_read(0xFF88);
return pas_model;
}
static void __init attach_pas_card(struct address_info *hw_config)
{
pas_irq = hw_config->irq;
if (detect_pas_hw(hw_config))
{
if ((pas_model = pas_read(0xFF88)))
{
char temp[100];
if (pas_model < 0 ||
pas_model >= ARRAY_SIZE(pas_model_names)) {
printk(KERN_ERR "pas2 unrecognized model.\n");
return;
}
sprintf(temp,
"%s rev %d", pas_model_names[(int) pas_model],
pas_read(0x2789));
conf_printf(temp, hw_config);
}
if (config_pas_hw(hw_config))
{
pas_pcm_init(hw_config);
pas_midi_init();
pas_init_mixer();
}
}
}
static inline int __init probe_pas(struct address_info *hw_config)
{
return detect_pas_hw(hw_config);
}
static void __exit unload_pas(struct address_info *hw_config)
{
extern int pas_audiodev;
extern int pas2_mididev;
if (hw_config->dma>0)
sound_free_dma(hw_config->dma);
if (hw_config->irq>0)
free_irq(hw_config->irq, hw_config);
if(pas_audiodev!=-1)
sound_unload_mixerdev(audio_devs[pas_audiodev]->mixer_dev);
if(pas2_mididev!=-1)
sound_unload_mididev(pas2_mididev);
if(pas_audiodev!=-1)
sound_unload_audiodev(pas_audiodev);
}
static int __initdata io = -1;
static int __initdata irq = -1;
static int __initdata dma = -1;
static int __initdata dma16 = -1; /* Set this for modules that need it */
static int __initdata sb_io = 0;
static int __initdata sb_irq = -1;
static int __initdata sb_dma = -1;
static int __initdata sb_dma16 = -1;
module_param(io, int, 0);
module_param(irq, int, 0);
module_param(dma, int, 0);
module_param(dma16, int, 0);
module_param(sb_io, int, 0);
module_param(sb_irq, int, 0);
module_param(sb_dma, int, 0);
module_param(sb_dma16, int, 0);
module_param(joystick, bool, 0);
module_param(symphony, bool, 0);
module_param(broken_bus_clock, bool, 0);
MODULE_LICENSE("GPL");
static int __init init_pas2(void)
{
printk(KERN_INFO "Pro Audio Spectrum driver Copyright (C) by Hannu Savolainen 1993-1996\n");
cfg.io_base = io;
cfg.irq = irq;
cfg.dma = dma;
cfg.dma2 = dma16;
cfg2.io_base = sb_io;
cfg2.irq = sb_irq;
cfg2.dma = sb_dma;
cfg2.dma2 = sb_dma16;
if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
printk(KERN_INFO "I/O, IRQ, DMA and type are mandatory\n");
return -EINVAL;
}
if (!probe_pas(&cfg))
return -ENODEV;
attach_pas_card(&cfg);
return 0;
}
static void __exit cleanup_pas2(void)
{
unload_pas(&cfg);
}
module_init(init_pas2);
module_exit(cleanup_pas2);
#ifndef MODULE
static int __init setup_pas2(char *str)
{
/* io, irq, dma, dma2, sb_io, sb_irq, sb_dma, sb_dma2 */
int ints[9];
str = get_options(str, ARRAY_SIZE(ints), ints);
io = ints[1];
irq = ints[2];
dma = ints[3];
dma16 = ints[4];
sb_io = ints[5];
sb_irq = ints[6];
sb_dma = ints[7];
sb_dma16 = ints[8];
return 1;
}
__setup("pas2=", setup_pas2);
#endif
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