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kernel-fxtec-pro1x/sound/oss/trix.c
David Howells 232b0b0829 Annotate hardware config module parameters in sound/oss/ 
When the kernel is running in secure boot mode, we lock down the kernel to
prevent userspace from modifying the running kernel image.  Whilst this
includes prohibiting access to things like /dev/mem, it must also prevent
access by means of configuring driver modules in such a way as to cause a
device to access or modify the kernel image.

To this end, annotate module_param* statements that refer to hardware
configuration and indicate for future reference what type of parameter they
specify.  The parameter parser in the core sees this information and can
skip such parameters with an error message if the kernel is locked down.
The module initialisation then runs as normal, but just sees whatever the
default values for those parameters is.

Note that we do still need to do the module initialisation because some
drivers have viable defaults set in case parameters aren't specified and
some drivers support automatic configuration (e.g. PNP or PCI) in addition
to manually coded parameters.

This patch annotates drivers in sound/oss/.

Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jaroslav Kysela <perex@perex.cz>
cc: Takashi Iwai <tiwai@suse.com>
cc: Andrew Veliath <andrewtv@usa.net>
cc: alsa-devel@alsa-project.org
2017-04-20 12:02:32 +01:00

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/*
* sound/oss/trix.c
*
* Low level driver for the MediaTrix AudioTrix Pro
* (MT-0002-PC Control Chip)
*
*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*
* Changes
* Alan Cox Modularisation, cleanup.
* Christoph Hellwig Adapted to module_init/module_exit
* Arnaldo C. de Melo Got rid of attach_uart401
*/
#include <linux/init.h>
#include <linux/module.h>
#include "sound_config.h"
#include "sb.h"
#include "sound_firmware.h"
#include "ad1848.h"
#include "mpu401.h"
#include "trix_boot.h"
static int mpu;
static bool joystick;
static unsigned char trix_read(int addr)
{
outb(((unsigned char) addr), 0x390); /* MT-0002-PC ASIC address */
return inb(0x391); /* MT-0002-PC ASIC data */
}
static void trix_write(int addr, int data)
{
outb(((unsigned char) addr), 0x390); /* MT-0002-PC ASIC address */
outb(((unsigned char) data), 0x391); /* MT-0002-PC ASIC data */
}
static void download_boot(int base)
{
int i = 0, n = trix_boot_len;
if (trix_boot_len == 0)
return;
trix_write(0xf8, 0x00); /* ??????? */
outb((0x01), base + 6); /* Clear the internal data pointer */
outb((0x00), base + 6); /* Restart */
/*
* Write the boot code to the RAM upload/download register.
* Each write increments the internal data pointer.
*/
outb((0x01), base + 6); /* Clear the internal data pointer */
outb((0x1A), 0x390); /* Select RAM download/upload port */
for (i = 0; i < n; i++)
outb((trix_boot[i]), 0x391);
for (i = n; i < 10016; i++) /* Clear up to first 16 bytes of data RAM */
outb((0x00), 0x391);
outb((0x00), base + 6); /* Reset */
outb((0x50), 0x390); /* ?????? */
}
static int trix_set_wss_port(struct address_info *hw_config)
{
unsigned char addr_bits;
if (trix_read(0x15) != 0x71) /* No ASIC signature */
{
MDB(printk(KERN_ERR "No AudioTrix ASIC signature found\n"));
return 0;
}
/*
* Reset some registers.
*/
trix_write(0x13, 0);
trix_write(0x14, 0);
/*
* Configure the ASIC to place the codec to the proper I/O location
*/
switch (hw_config->io_base)
{
case 0x530:
addr_bits = 0;
break;
case 0x604:
addr_bits = 1;
break;
case 0xE80:
addr_bits = 2;
break;
case 0xF40:
addr_bits = 3;
break;
default:
return 0;
}
trix_write(0x19, (trix_read(0x19) & 0x03) | addr_bits);
return 1;
}
/*
* Probe and attach routines for the Windows Sound System mode of
* AudioTrix Pro
*/
static int __init init_trix_wss(struct address_info *hw_config)
{
static unsigned char dma_bits[4] = {
1, 2, 0, 3
};
struct resource *ports;
int config_port = hw_config->io_base + 0;
int dma1 = hw_config->dma, dma2 = hw_config->dma2;
int old_num_mixers = num_mixers;
u8 config, bits;
int ret;
switch(hw_config->irq) {
case 7:
bits = 8;
break;
case 9:
bits = 0x10;
break;
case 10:
bits = 0x18;
break;
case 11:
bits = 0x20;
break;
default:
printk(KERN_ERR "AudioTrix: Bad WSS IRQ %d\n", hw_config->irq);
return 0;
}
switch (dma1) {
case 0:
case 1:
case 3:
break;
default:
printk(KERN_ERR "AudioTrix: Bad WSS DMA %d\n", dma1);
return 0;
}
switch (dma2) {
case -1:
case 0:
case 1:
case 3:
break;
default:
printk(KERN_ERR "AudioTrix: Bad capture DMA %d\n", dma2);
return 0;
}
/*
* Check if the IO port returns valid signature. The original MS Sound
* system returns 0x04 while some cards (AudioTrix Pro for example)
* return 0x00.
*/
ports = request_region(hw_config->io_base + 4, 4, "ad1848");
if (!ports) {
printk(KERN_ERR "AudioTrix: MSS I/O port conflict (%x)\n", hw_config->io_base);
return 0;
}
if (!request_region(hw_config->io_base, 4, "MSS config")) {
printk(KERN_ERR "AudioTrix: MSS I/O port conflict (%x)\n", hw_config->io_base);
release_region(hw_config->io_base + 4, 4);
return 0;
}
if (!trix_set_wss_port(hw_config))
goto fail;
config = inb(hw_config->io_base + 3);
if ((config & 0x3f) != 0x00)
{
MDB(printk(KERN_ERR "No MSS signature detected on port 0x%x\n", hw_config->io_base));
goto fail;
}
/*
* Check that DMA0 is not in use with a 8 bit board.
*/
if (dma1 == 0 && config & 0x80)
{
printk(KERN_ERR "AudioTrix: Can't use DMA0 with a 8 bit card slot\n");
goto fail;
}
if (hw_config->irq > 9 && config & 0x80)
{
printk(KERN_ERR "AudioTrix: Can't use IRQ%d with a 8 bit card slot\n", hw_config->irq);
goto fail;
}
ret = ad1848_detect(ports, NULL, hw_config->osp);
if (!ret)
goto fail;
if (joystick==1)
trix_write(0x15, 0x80);
/*
* Set the IRQ and DMA addresses.
*/
outb((bits | 0x40), config_port);
if (dma2 == -1 || dma2 == dma1)
{
bits |= dma_bits[dma1];
dma2 = dma1;
}
else
{
unsigned char tmp;
tmp = trix_read(0x13) & ~30;
trix_write(0x13, tmp | 0x80 | (dma1 << 4));
tmp = trix_read(0x14) & ~30;
trix_write(0x14, tmp | 0x80 | (dma2 << 4));
}
outb((bits), config_port); /* Write IRQ+DMA setup */
hw_config->slots[0] = ad1848_init("AudioTrix Pro", ports,
hw_config->irq,
dma1,
dma2,
0,
hw_config->osp,
THIS_MODULE);
if (num_mixers > old_num_mixers) /* Mixer got installed */
{
AD1848_REROUTE(SOUND_MIXER_LINE1, SOUND_MIXER_LINE); /* Line in */
AD1848_REROUTE(SOUND_MIXER_LINE2, SOUND_MIXER_CD);
AD1848_REROUTE(SOUND_MIXER_LINE3, SOUND_MIXER_SYNTH); /* OPL4 */
AD1848_REROUTE(SOUND_MIXER_SPEAKER, SOUND_MIXER_ALTPCM); /* SB */
}
return 1;
fail:
release_region(hw_config->io_base, 4);
release_region(hw_config->io_base + 4, 4);
return 0;
}
static int __init probe_trix_sb(struct address_info *hw_config)
{
int tmp;
unsigned char conf;
extern int sb_be_quiet;
int old_quiet;
static signed char irq_translate[] = {
-1, -1, -1, 0, 1, 2, -1, 3
};
if (trix_boot_len == 0)
return 0; /* No boot code -> no fun */
if ((hw_config->io_base & 0xffffff8f) != 0x200)
return 0;
tmp = hw_config->irq;
if (tmp > 7)
return 0;
if (irq_translate[tmp] == -1)
return 0;
tmp = hw_config->dma;
if (tmp != 1 && tmp != 3)
return 0;
if (!request_region(hw_config->io_base, 16, "soundblaster")) {
printk(KERN_ERR "AudioTrix: SB I/O port conflict (%x)\n", hw_config->io_base);
return 0;
}
conf = 0x84; /* DMA and IRQ enable */
conf |= hw_config->io_base & 0x70; /* I/O address bits */
conf |= irq_translate[hw_config->irq];
if (hw_config->dma == 3)
conf |= 0x08;
trix_write(0x1b, conf);
download_boot(hw_config->io_base);
hw_config->name = "AudioTrix SB";
if (!sb_dsp_detect(hw_config, 0, 0, NULL)) {
release_region(hw_config->io_base, 16);
return 0;
}
hw_config->driver_use_1 = SB_NO_MIDI | SB_NO_MIXER | SB_NO_RECORDING;
/* Prevent false alarms */
old_quiet = sb_be_quiet;
sb_be_quiet = 1;
sb_dsp_init(hw_config, THIS_MODULE);
sb_be_quiet = old_quiet;
return 1;
}
static int __init probe_trix_mpu(struct address_info *hw_config)
{
unsigned char conf;
static int irq_bits[] = {
-1, -1, -1, 1, 2, 3, -1, 4, -1, 5
};
if (hw_config->irq > 9)
{
printk(KERN_ERR "AudioTrix: Bad MPU IRQ %d\n", hw_config->irq);
return 0;
}
if (irq_bits[hw_config->irq] == -1)
{
printk(KERN_ERR "AudioTrix: Bad MPU IRQ %d\n", hw_config->irq);
return 0;
}
switch (hw_config->io_base)
{
case 0x330:
conf = 0x00;
break;
case 0x370:
conf = 0x04;
break;
case 0x3b0:
conf = 0x08;
break;
case 0x3f0:
conf = 0x0c;
break;
default:
return 0; /* Invalid port */
}
conf |= irq_bits[hw_config->irq] << 4;
trix_write(0x19, (trix_read(0x19) & 0x83) | conf);
hw_config->name = "AudioTrix Pro";
return probe_uart401(hw_config, THIS_MODULE);
}
static void __exit unload_trix_wss(struct address_info *hw_config)
{
int dma2 = hw_config->dma2;
if (dma2 == -1)
dma2 = hw_config->dma;
release_region(0x390, 2);
release_region(hw_config->io_base, 4);
ad1848_unload(hw_config->io_base + 4,
hw_config->irq,
hw_config->dma,
dma2,
0);
sound_unload_audiodev(hw_config->slots[0]);
}
static inline void __exit unload_trix_mpu(struct address_info *hw_config)
{
unload_uart401(hw_config);
}
static inline void __exit unload_trix_sb(struct address_info *hw_config)
{
sb_dsp_unload(hw_config, mpu);
}
static struct address_info cfg;
static struct address_info cfg2;
static struct address_info cfg_mpu;
static int sb;
static int fw_load;
static int __initdata io = -1;
static int __initdata irq = -1;
static int __initdata dma = -1;
static int __initdata dma2 = -1; /* Set this for modules that need it */
static int __initdata sb_io = -1;
static int __initdata sb_dma = -1;
static int __initdata sb_irq = -1;
static int __initdata mpu_io = -1;
static int __initdata mpu_irq = -1;
module_param_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param_hw(dma, int, dma, 0);
module_param_hw(dma2, int, dma, 0);
module_param_hw(sb_io, int, ioport, 0);
module_param_hw(sb_dma, int, dma, 0);
module_param_hw(sb_irq, int, irq, 0);
module_param_hw(mpu_io, int, ioport, 0);
module_param_hw(mpu_irq, int, irq, 0);
module_param(joystick, bool, 0);
static int __init init_trix(void)
{
printk(KERN_INFO "MediaTrix audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
cfg.io_base = io;
cfg.irq = irq;
cfg.dma = dma;
cfg.dma2 = dma2;
cfg2.io_base = sb_io;
cfg2.irq = sb_irq;
cfg2.dma = sb_dma;
cfg_mpu.io_base = mpu_io;
cfg_mpu.irq = mpu_irq;
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 (cfg2.io_base != -1 && (cfg2.irq == -1 || cfg2.dma == -1)) {
printk(KERN_INFO "CONFIG_SB_IRQ and CONFIG_SB_DMA must be specified if SB_IO is set.\n");
return -EINVAL;
}
if (cfg_mpu.io_base != -1 && cfg_mpu.irq == -1) {
printk(KERN_INFO "CONFIG_MPU_IRQ must be specified if MPU_IO is set.\n");
return -EINVAL;
}
if (!trix_boot)
{
fw_load = 1;
trix_boot_len = mod_firmware_load("/etc/sound/trxpro.bin",
(char **) &trix_boot);
}
if (!request_region(0x390, 2, "AudioTrix")) {
printk(KERN_ERR "AudioTrix: Config port I/O conflict\n");
return -ENODEV;
}
if (!init_trix_wss(&cfg)) {
release_region(0x390, 2);
return -ENODEV;
}
/*
* We must attach in the right order to get the firmware
* loaded up in time.
*/
if (cfg2.io_base != -1) {
sb = probe_trix_sb(&cfg2);
}
if (cfg_mpu.io_base != -1)
mpu = probe_trix_mpu(&cfg_mpu);
return 0;
}
static void __exit cleanup_trix(void)
{
if (fw_load)
vfree(trix_boot);
if (sb)
unload_trix_sb(&cfg2);
if (mpu)
unload_trix_mpu(&cfg_mpu);
unload_trix_wss(&cfg);
}
module_init(init_trix);
module_exit(cleanup_trix);
#ifndef MODULE
static int __init setup_trix (char *str)
{
/* io, irq, dma, dma2, sb_io, sb_irq, sb_dma, mpu_io, mpu_irq */
int ints[9];
str = get_options(str, ARRAY_SIZE(ints), ints);
io = ints[1];
irq = ints[2];
dma = ints[3];
dma2 = ints[4];
sb_io = ints[5];
sb_irq = ints[6];
sb_dma = ints[6];
mpu_io = ints[7];
mpu_irq = ints[8];
return 1;
}
__setup("trix=", setup_trix);
#endif
MODULE_LICENSE("GPL");
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