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remarkable-linux/sound/isa/galaxy/galaxy.c
David Howells e992ef5705 Annotate hardware config module parameters in sound/isa/ 
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/isa/.

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: alsa-devel@alsa-project.org
2017-04-20 12:02:32 +01:00

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/*
* Aztech AZT1605/AZT2316 Driver
* Copyright (C) 2007,2010 Rene Herman
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/isa.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/processor.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/wss.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
MODULE_DESCRIPTION(CRD_NAME);
MODULE_AUTHOR("Rene Herman");
MODULE_LICENSE("GPL");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
module_param_hw_array(port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
module_param_hw_array(wss_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(wss_port, "WSS port # for " CRD_NAME " driver.");
module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
module_param_hw_array(fm_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM port # for " CRD_NAME " driver.");
module_param_hw_array(irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
module_param_hw_array(dma1, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma1, "Playback DMA # for " CRD_NAME " driver.");
module_param_hw_array(dma2, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma2, "Capture DMA # for " CRD_NAME " driver.");
/*
* Generic SB DSP support routines
*/
#define DSP_PORT_RESET 0x6
#define DSP_PORT_READ 0xa
#define DSP_PORT_COMMAND 0xc
#define DSP_PORT_STATUS 0xc
#define DSP_PORT_DATA_AVAIL 0xe
#define DSP_SIGNATURE 0xaa
#define DSP_COMMAND_GET_VERSION 0xe1
static int dsp_get_byte(void __iomem *port, u8 *val)
{
int loops = 1000;
while (!(ioread8(port + DSP_PORT_DATA_AVAIL) & 0x80)) {
if (!loops--)
return -EIO;
cpu_relax();
}
*val = ioread8(port + DSP_PORT_READ);
return 0;
}
static int dsp_reset(void __iomem *port)
{
u8 val;
iowrite8(1, port + DSP_PORT_RESET);
udelay(10);
iowrite8(0, port + DSP_PORT_RESET);
if (dsp_get_byte(port, &val) < 0 || val != DSP_SIGNATURE)
return -ENODEV;
return 0;
}
static int dsp_command(void __iomem *port, u8 cmd)
{
int loops = 1000;
while (ioread8(port + DSP_PORT_STATUS) & 0x80) {
if (!loops--)
return -EIO;
cpu_relax();
}
iowrite8(cmd, port + DSP_PORT_COMMAND);
return 0;
}
static int dsp_get_version(void __iomem *port, u8 *major, u8 *minor)
{
int err;
err = dsp_command(port, DSP_COMMAND_GET_VERSION);
if (err < 0)
return err;
err = dsp_get_byte(port, major);
if (err < 0)
return err;
err = dsp_get_byte(port, minor);
if (err < 0)
return err;
return 0;
}
/*
* Generic WSS support routines
*/
#define WSS_CONFIG_DMA_0 (1 << 0)
#define WSS_CONFIG_DMA_1 (2 << 0)
#define WSS_CONFIG_DMA_3 (3 << 0)
#define WSS_CONFIG_DUPLEX (1 << 2)
#define WSS_CONFIG_IRQ_7 (1 << 3)
#define WSS_CONFIG_IRQ_9 (2 << 3)
#define WSS_CONFIG_IRQ_10 (3 << 3)
#define WSS_CONFIG_IRQ_11 (4 << 3)
#define WSS_PORT_CONFIG 0
#define WSS_PORT_SIGNATURE 3
#define WSS_SIGNATURE 4
static int wss_detect(void __iomem *wss_port)
{
if ((ioread8(wss_port + WSS_PORT_SIGNATURE) & 0x3f) != WSS_SIGNATURE)
return -ENODEV;
return 0;
}
static void wss_set_config(void __iomem *wss_port, u8 wss_config)
{
iowrite8(wss_config, wss_port + WSS_PORT_CONFIG);
}
/*
* Aztech Sound Galaxy specifics
*/
#define GALAXY_PORT_CONFIG 1024
#define CONFIG_PORT_SET 4
#define DSP_COMMAND_GALAXY_8 8
#define GALAXY_COMMAND_GET_TYPE 5
#define DSP_COMMAND_GALAXY_9 9
#define GALAXY_COMMAND_WSSMODE 0
#define GALAXY_COMMAND_SB8MODE 1
#define GALAXY_MODE_WSS GALAXY_COMMAND_WSSMODE
#define GALAXY_MODE_SB8 GALAXY_COMMAND_SB8MODE
struct snd_galaxy {
void __iomem *port;
void __iomem *config_port;
void __iomem *wss_port;
u32 config;
struct resource *res_port;
struct resource *res_config_port;
struct resource *res_wss_port;
};
static u32 config[SNDRV_CARDS];
static u8 wss_config[SNDRV_CARDS];
static int snd_galaxy_match(struct device *dev, unsigned int n)
{
if (!enable[n])
return 0;
switch (port[n]) {
case SNDRV_AUTO_PORT:
dev_err(dev, "please specify port\n");
return 0;
case 0x220:
config[n] |= GALAXY_CONFIG_SBA_220;
break;
case 0x240:
config[n] |= GALAXY_CONFIG_SBA_240;
break;
case 0x260:
config[n] |= GALAXY_CONFIG_SBA_260;
break;
case 0x280:
config[n] |= GALAXY_CONFIG_SBA_280;
break;
default:
dev_err(dev, "invalid port %#lx\n", port[n]);
return 0;
}
switch (wss_port[n]) {
case SNDRV_AUTO_PORT:
dev_err(dev, "please specify wss_port\n");
return 0;
case 0x530:
config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_530;
break;
case 0x604:
config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_604;
break;
case 0xe80:
config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_E80;
break;
case 0xf40:
config[n] |= GALAXY_CONFIG_WSS_ENABLE | GALAXY_CONFIG_WSSA_F40;
break;
default:
dev_err(dev, "invalid WSS port %#lx\n", wss_port[n]);
return 0;
}
switch (irq[n]) {
case SNDRV_AUTO_IRQ:
dev_err(dev, "please specify irq\n");
return 0;
case 7:
wss_config[n] |= WSS_CONFIG_IRQ_7;
break;
case 2:
irq[n] = 9;
case 9:
wss_config[n] |= WSS_CONFIG_IRQ_9;
break;
case 10:
wss_config[n] |= WSS_CONFIG_IRQ_10;
break;
case 11:
wss_config[n] |= WSS_CONFIG_IRQ_11;
break;
default:
dev_err(dev, "invalid IRQ %d\n", irq[n]);
return 0;
}
switch (dma1[n]) {
case SNDRV_AUTO_DMA:
dev_err(dev, "please specify dma1\n");
return 0;
case 0:
wss_config[n] |= WSS_CONFIG_DMA_0;
break;
case 1:
wss_config[n] |= WSS_CONFIG_DMA_1;
break;
case 3:
wss_config[n] |= WSS_CONFIG_DMA_3;
break;
default:
dev_err(dev, "invalid playback DMA %d\n", dma1[n]);
return 0;
}
if (dma2[n] == SNDRV_AUTO_DMA || dma2[n] == dma1[n]) {
dma2[n] = -1;
goto mpu;
}
wss_config[n] |= WSS_CONFIG_DUPLEX;
switch (dma2[n]) {
case 0:
break;
case 1:
if (dma1[n] == 0)
break;
default:
dev_err(dev, "invalid capture DMA %d\n", dma2[n]);
return 0;
}
mpu:
switch (mpu_port[n]) {
case SNDRV_AUTO_PORT:
dev_warn(dev, "mpu_port not specified; not using MPU-401\n");
mpu_port[n] = -1;
goto fm;
case 0x300:
config[n] |= GALAXY_CONFIG_MPU_ENABLE | GALAXY_CONFIG_MPUA_300;
break;
case 0x330:
config[n] |= GALAXY_CONFIG_MPU_ENABLE | GALAXY_CONFIG_MPUA_330;
break;
default:
dev_err(dev, "invalid MPU port %#lx\n", mpu_port[n]);
return 0;
}
switch (mpu_irq[n]) {
case SNDRV_AUTO_IRQ:
dev_warn(dev, "mpu_irq not specified: using polling mode\n");
mpu_irq[n] = -1;
break;
case 2:
mpu_irq[n] = 9;
case 9:
config[n] |= GALAXY_CONFIG_MPUIRQ_2;
break;
#ifdef AZT1605
case 3:
config[n] |= GALAXY_CONFIG_MPUIRQ_3;
break;
#endif
case 5:
config[n] |= GALAXY_CONFIG_MPUIRQ_5;
break;
case 7:
config[n] |= GALAXY_CONFIG_MPUIRQ_7;
break;
#ifdef AZT2316
case 10:
config[n] |= GALAXY_CONFIG_MPUIRQ_10;
break;
#endif
default:
dev_err(dev, "invalid MPU IRQ %d\n", mpu_irq[n]);
return 0;
}
if (mpu_irq[n] == irq[n]) {
dev_err(dev, "cannot share IRQ between WSS and MPU-401\n");
return 0;
}
fm:
switch (fm_port[n]) {
case SNDRV_AUTO_PORT:
dev_warn(dev, "fm_port not specified: not using OPL3\n");
fm_port[n] = -1;
break;
case 0x388:
break;
default:
dev_err(dev, "illegal FM port %#lx\n", fm_port[n]);
return 0;
}
config[n] |= GALAXY_CONFIG_GAME_ENABLE;
return 1;
}
static int galaxy_init(struct snd_galaxy *galaxy, u8 *type)
{
u8 major;
u8 minor;
int err;
err = dsp_reset(galaxy->port);
if (err < 0)
return err;
err = dsp_get_version(galaxy->port, &major, &minor);
if (err < 0)
return err;
if (major != GALAXY_DSP_MAJOR || minor != GALAXY_DSP_MINOR)
return -ENODEV;
err = dsp_command(galaxy->port, DSP_COMMAND_GALAXY_8);
if (err < 0)
return err;
err = dsp_command(galaxy->port, GALAXY_COMMAND_GET_TYPE);
if (err < 0)
return err;
err = dsp_get_byte(galaxy->port, type);
if (err < 0)
return err;
return 0;
}
static int galaxy_set_mode(struct snd_galaxy *galaxy, u8 mode)
{
int err;
err = dsp_command(galaxy->port, DSP_COMMAND_GALAXY_9);
if (err < 0)
return err;
err = dsp_command(galaxy->port, mode);
if (err < 0)
return err;
#ifdef AZT1605
/*
* Needed for MPU IRQ on AZT1605, but AZT2316 loses WSS again
*/
err = dsp_reset(galaxy->port);
if (err < 0)
return err;
#endif
return 0;
}
static void galaxy_set_config(struct snd_galaxy *galaxy, u32 config)
{
u8 tmp = ioread8(galaxy->config_port + CONFIG_PORT_SET);
int i;
iowrite8(tmp | 0x80, galaxy->config_port + CONFIG_PORT_SET);
for (i = 0; i < GALAXY_CONFIG_SIZE; i++) {
iowrite8(config, galaxy->config_port + i);
config >>= 8;
}
iowrite8(tmp & 0x7f, galaxy->config_port + CONFIG_PORT_SET);
msleep(10);
}
static void galaxy_config(struct snd_galaxy *galaxy, u32 config)
{
int i;
for (i = GALAXY_CONFIG_SIZE; i; i--) {
u8 tmp = ioread8(galaxy->config_port + i - 1);
galaxy->config = (galaxy->config << 8) | tmp;
}
config |= galaxy->config & GALAXY_CONFIG_MASK;
galaxy_set_config(galaxy, config);
}
static int galaxy_wss_config(struct snd_galaxy *galaxy, u8 wss_config)
{
int err;
err = wss_detect(galaxy->wss_port);
if (err < 0)
return err;
wss_set_config(galaxy->wss_port, wss_config);
err = galaxy_set_mode(galaxy, GALAXY_MODE_WSS);
if (err < 0)
return err;
return 0;
}
static void snd_galaxy_free(struct snd_card *card)
{
struct snd_galaxy *galaxy = card->private_data;
if (galaxy->wss_port) {
wss_set_config(galaxy->wss_port, 0);
ioport_unmap(galaxy->wss_port);
release_and_free_resource(galaxy->res_wss_port);
}
if (galaxy->config_port) {
galaxy_set_config(galaxy, galaxy->config);
ioport_unmap(galaxy->config_port);
release_and_free_resource(galaxy->res_config_port);
}
if (galaxy->port) {
ioport_unmap(galaxy->port);
release_and_free_resource(galaxy->res_port);
}
}
static int snd_galaxy_probe(struct device *dev, unsigned int n)
{
struct snd_galaxy *galaxy;
struct snd_wss *chip;
struct snd_card *card;
u8 type;
int err;
err = snd_card_new(dev, index[n], id[n], THIS_MODULE,
sizeof(*galaxy), &card);
if (err < 0)
return err;
card->private_free = snd_galaxy_free;
galaxy = card->private_data;
galaxy->res_port = request_region(port[n], 16, DRV_NAME);
if (!galaxy->res_port) {
dev_err(dev, "could not grab ports %#lx-%#lx\n", port[n],
port[n] + 15);
err = -EBUSY;
goto error;
}
galaxy->port = ioport_map(port[n], 16);
err = galaxy_init(galaxy, &type);
if (err < 0) {
dev_err(dev, "did not find a Sound Galaxy at %#lx\n", port[n]);
goto error;
}
dev_info(dev, "Sound Galaxy (type %d) found at %#lx\n", type, port[n]);
galaxy->res_config_port = request_region(port[n] + GALAXY_PORT_CONFIG,
16, DRV_NAME);
if (!galaxy->res_config_port) {
dev_err(dev, "could not grab ports %#lx-%#lx\n",
port[n] + GALAXY_PORT_CONFIG,
port[n] + GALAXY_PORT_CONFIG + 15);
err = -EBUSY;
goto error;
}
galaxy->config_port = ioport_map(port[n] + GALAXY_PORT_CONFIG, 16);
galaxy_config(galaxy, config[n]);
galaxy->res_wss_port = request_region(wss_port[n], 4, DRV_NAME);
if (!galaxy->res_wss_port) {
dev_err(dev, "could not grab ports %#lx-%#lx\n", wss_port[n],
wss_port[n] + 3);
err = -EBUSY;
goto error;
}
galaxy->wss_port = ioport_map(wss_port[n], 4);
err = galaxy_wss_config(galaxy, wss_config[n]);
if (err < 0) {
dev_err(dev, "could not configure WSS\n");
goto error;
}
strcpy(card->driver, DRV_NAME);
strcpy(card->shortname, DRV_NAME);
sprintf(card->longname, "%s at %#lx/%#lx, irq %d, dma %d/%d",
card->shortname, port[n], wss_port[n], irq[n], dma1[n],
dma2[n]);
err = snd_wss_create(card, wss_port[n] + 4, -1, irq[n], dma1[n],
dma2[n], WSS_HW_DETECT, 0, &chip);
if (err < 0)
goto error;
err = snd_wss_pcm(chip, 0);
if (err < 0)
goto error;
err = snd_wss_mixer(chip);
if (err < 0)
goto error;
err = snd_wss_timer(chip, 0);
if (err < 0)
goto error;
if (mpu_port[n] >= 0) {
err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
mpu_port[n], 0, mpu_irq[n], NULL);
if (err < 0)
goto error;
}
if (fm_port[n] >= 0) {
struct snd_opl3 *opl3;
err = snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
OPL3_HW_AUTO, 0, &opl3);
if (err < 0) {
dev_err(dev, "no OPL device at %#lx\n", fm_port[n]);
goto error;
}
err = snd_opl3_timer_new(opl3, 1, 2);
if (err < 0)
goto error;
err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
if (err < 0)
goto error;
}
err = snd_card_register(card);
if (err < 0)
goto error;
dev_set_drvdata(dev, card);
return 0;
error:
snd_card_free(card);
return err;
}
static int snd_galaxy_remove(struct device *dev, unsigned int n)
{
snd_card_free(dev_get_drvdata(dev));
return 0;
}
static struct isa_driver snd_galaxy_driver = {
.match = snd_galaxy_match,
.probe = snd_galaxy_probe,
.remove = snd_galaxy_remove,
.driver = {
.name = DEV_NAME
}
};
module_isa_driver(snd_galaxy_driver, SNDRV_CARDS);
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