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linux/sound/isa/sc6000.c
Lars-Peter Clausen fa60c06569 ALSA: wss: Remove (almost) always NULL parameters 
Most callers of snd_wss_pcm(), snd_wss_timer() and snd_cs4236_pcm() pass
NULL as the last parameter, some callers pass a pointer but never use it
after the function has been called and only a few callers pass a pointer and
actually use it. The later is only the case for snd_wss_pcm() for
snd_cs4236_pcm() and it is possible to get the same PCM object by accessing
the pcm field of the snd_wss struct that was passed as the first parameter.

This function removes the last parameters from the functions mentioned above
and updates the callers which used it to use chip->pcm instead. This allows
us to slightly simplify the functions since they don't have to check and set
the last parameter anymore which makes the code slightly shorter and
cleaner.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-01-02 16:30:08 +01:00

726 lines
18 KiB
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/*
* Driver for Gallant SC-6000 soundcard. This card is also known as
* Audio Excel DSP 16 or Zoltrix AV302.
* These cards use CompuMedia ASC-9308 chip + AD1848 codec.
* SC-6600 and SC-7000 cards are also supported. They are based on
* CompuMedia ASC-9408 chip and CS4231 codec.
*
* Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
*
* I don't have documentation for this card. I used the driver
* for OSS/Free included in the kernel source as reference.
*
* 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 <linux/module.h>
#include <linux/delay.h>
#include <linux/isa.h>
#include <linux/io.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/wss.h>
#include <sound/opl3.h>
#include <sound/mpu401.h>
#include <sound/control.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>
MODULE_AUTHOR("Krzysztof Helt");
MODULE_DESCRIPTION("Gallant SC-6000");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Gallant, SC-6000},"
"{AudioExcel, Audio Excel DSP 16},"
"{Zoltrix, AV302}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220, 0x240 */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5, 7, 9, 10, 11 */
static long mss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x530, 0xe80 */
static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
/* 0x300, 0x310, 0x320, 0x330 */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5, 7, 9, 10, 0 */
static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0, 1, 3 */
static bool joystick[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = false };
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for sc-6000 based soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for sc-6000 based soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable sc-6000 based soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for sc-6000 driver.");
module_param_array(mss_port, long, NULL, 0444);
MODULE_PARM_DESC(mss_port, "MSS Port # for sc-6000 driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for sc-6000 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for sc-6000 driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for sc-6000 driver.");
module_param_array(dma, int, NULL, 0444);
MODULE_PARM_DESC(dma, "DMA # for sc-6000 driver.");
module_param_array(joystick, bool, NULL, 0444);
MODULE_PARM_DESC(joystick, "Enable gameport.");
/*
* Commands of SC6000's DSP (SBPRO+special).
* Some of them are COMMAND_xx, in the future they may change.
*/
#define WRITE_MDIRQ_CFG 0x50 /* Set M&I&DRQ mask (the real config) */
#define COMMAND_52 0x52 /* */
#define READ_HARD_CFG 0x58 /* Read Hardware Config (I/O base etc) */
#define COMMAND_5C 0x5c /* */
#define COMMAND_60 0x60 /* */
#define COMMAND_66 0x66 /* */
#define COMMAND_6C 0x6c /* */
#define COMMAND_6E 0x6e /* */
#define COMMAND_88 0x88 /* Unknown command */
#define DSP_INIT_MSS 0x8c /* Enable Microsoft Sound System mode */
#define COMMAND_C5 0xc5 /* */
#define GET_DSP_VERSION 0xe1 /* Get DSP Version */
#define GET_DSP_COPYRIGHT 0xe3 /* Get DSP Copyright */
/*
* Offsets of SC6000 DSP I/O ports. The offset is added to base I/O port
* to have the actual I/O port.
* Register permissions are:
* (wo) == Write Only
* (ro) == Read Only
* (w-) == Write
* (r-) == Read
*/
#define DSP_RESET 0x06 /* offset of DSP RESET (wo) */
#define DSP_READ 0x0a /* offset of DSP READ (ro) */
#define DSP_WRITE 0x0c /* offset of DSP WRITE (w-) */
#define DSP_COMMAND 0x0c /* offset of DSP COMMAND (w-) */
#define DSP_STATUS 0x0c /* offset of DSP STATUS (r-) */
#define DSP_DATAVAIL 0x0e /* offset of DSP DATA AVAILABLE (ro) */
#define PFX "sc6000: "
#define DRV_NAME "SC-6000"
/* hardware dependent functions */
/*
* sc6000_irq_to_softcfg - Decode irq number into cfg code.
*/
static unsigned char sc6000_irq_to_softcfg(int irq)
{
unsigned char val = 0;
switch (irq) {
case 5:
val = 0x28;
break;
case 7:
val = 0x8;
break;
case 9:
val = 0x10;
break;
case 10:
val = 0x18;
break;
case 11:
val = 0x20;
break;
default:
break;
}
return val;
}
/*
* sc6000_dma_to_softcfg - Decode dma number into cfg code.
*/
static unsigned char sc6000_dma_to_softcfg(int dma)
{
unsigned char val = 0;
switch (dma) {
case 0:
val = 1;
break;
case 1:
val = 2;
break;
case 3:
val = 3;
break;
default:
break;
}
return val;
}
/*
* sc6000_mpu_irq_to_softcfg - Decode MPU-401 irq number into cfg code.
*/
static unsigned char sc6000_mpu_irq_to_softcfg(int mpu_irq)
{
unsigned char val = 0;
switch (mpu_irq) {
case 5:
val = 4;
break;
case 7:
val = 0x44;
break;
case 9:
val = 0x84;
break;
case 10:
val = 0xc4;
break;
default:
break;
}
return val;
}
static int sc6000_wait_data(char __iomem *vport)
{
int loop = 1000;
unsigned char val = 0;
do {
val = ioread8(vport + DSP_DATAVAIL);
if (val & 0x80)
return 0;
cpu_relax();
} while (loop--);
return -EAGAIN;
}
static int sc6000_read(char __iomem *vport)
{
if (sc6000_wait_data(vport))
return -EBUSY;
return ioread8(vport + DSP_READ);
}
static int sc6000_write(char __iomem *vport, int cmd)
{
unsigned char val;
int loop = 500000;
do {
val = ioread8(vport + DSP_STATUS);
/*
* DSP ready to receive data if bit 7 of val == 0
*/
if (!(val & 0x80)) {
iowrite8(cmd, vport + DSP_COMMAND);
return 0;
}
cpu_relax();
} while (loop--);
snd_printk(KERN_ERR "DSP Command (0x%x) timeout.\n", cmd);
return -EIO;
}
static int sc6000_dsp_get_answer(char __iomem *vport, int command,
char *data, int data_len)
{
int len = 0;
if (sc6000_write(vport, command)) {
snd_printk(KERN_ERR "CMD 0x%x: failed!\n", command);
return -EIO;
}
do {
int val = sc6000_read(vport);
if (val < 0)
break;
data[len++] = val;
} while (len < data_len);
/*
* If no more data available, return to the caller, no error if len>0.
* We have no other way to know when the string is finished.
*/
return len ? len : -EIO;
}
static int sc6000_dsp_reset(char __iomem *vport)
{
iowrite8(1, vport + DSP_RESET);
udelay(10);
iowrite8(0, vport + DSP_RESET);
udelay(20);
if (sc6000_read(vport) == 0xaa)
return 0;
return -ENODEV;
}
/* detection and initialization */
static int sc6000_hw_cfg_write(char __iomem *vport, const int *cfg)
{
if (sc6000_write(vport, COMMAND_6C) < 0) {
snd_printk(KERN_WARNING "CMD 0x%x: failed!\n", COMMAND_6C);
return -EIO;
}
if (sc6000_write(vport, COMMAND_5C) < 0) {
snd_printk(KERN_ERR "CMD 0x%x: failed!\n", COMMAND_5C);
return -EIO;
}
if (sc6000_write(vport, cfg[0]) < 0) {
snd_printk(KERN_ERR "DATA 0x%x: failed!\n", cfg[0]);
return -EIO;
}
if (sc6000_write(vport, cfg[1]) < 0) {
snd_printk(KERN_ERR "DATA 0x%x: failed!\n", cfg[1]);
return -EIO;
}
if (sc6000_write(vport, COMMAND_C5) < 0) {
snd_printk(KERN_ERR "CMD 0x%x: failed!\n", COMMAND_C5);
return -EIO;
}
return 0;
}
static int sc6000_cfg_write(char __iomem *vport, unsigned char softcfg)
{
if (sc6000_write(vport, WRITE_MDIRQ_CFG)) {
snd_printk(KERN_ERR "CMD 0x%x: failed!\n", WRITE_MDIRQ_CFG);
return -EIO;
}
if (sc6000_write(vport, softcfg)) {
snd_printk(KERN_ERR "sc6000_cfg_write: failed!\n");
return -EIO;
}
return 0;
}
static int sc6000_setup_board(char __iomem *vport, int config)
{
int loop = 10;
do {
if (sc6000_write(vport, COMMAND_88)) {
snd_printk(KERN_ERR "CMD 0x%x: failed!\n",
COMMAND_88);
return -EIO;
}
} while ((sc6000_wait_data(vport) < 0) && loop--);
if (sc6000_read(vport) < 0) {
snd_printk(KERN_ERR "sc6000_read after CMD 0x%x: failed\n",
COMMAND_88);
return -EIO;
}
if (sc6000_cfg_write(vport, config))
return -ENODEV;
return 0;
}
static int sc6000_init_mss(char __iomem *vport, int config,
char __iomem *vmss_port, int mss_config)
{
if (sc6000_write(vport, DSP_INIT_MSS)) {
snd_printk(KERN_ERR "sc6000_init_mss [0x%x]: failed!\n",
DSP_INIT_MSS);
return -EIO;
}
msleep(10);
if (sc6000_cfg_write(vport, config))
return -EIO;
iowrite8(mss_config, vmss_port);
return 0;
}
static void sc6000_hw_cfg_encode(char __iomem *vport, int *cfg,
long xport, long xmpu,
long xmss_port, int joystick)
{
cfg[0] = 0;
cfg[1] = 0;
if (xport == 0x240)
cfg[0] |= 1;
if (xmpu != SNDRV_AUTO_PORT) {
cfg[0] |= (xmpu & 0x30) >> 2;
cfg[1] |= 0x20;
}
if (xmss_port == 0xe80)
cfg[0] |= 0x10;
cfg[0] |= 0x40; /* always set */
if (!joystick)
cfg[0] |= 0x02;
cfg[1] |= 0x80; /* enable WSS system */
cfg[1] &= ~0x40; /* disable IDE */
snd_printd("hw cfg %x, %x\n", cfg[0], cfg[1]);
}
static int sc6000_init_board(char __iomem *vport,
char __iomem *vmss_port, int dev)
{
char answer[15];
char version[2];
int mss_config = sc6000_irq_to_softcfg(irq[dev]) |
sc6000_dma_to_softcfg(dma[dev]);
int config = mss_config |
sc6000_mpu_irq_to_softcfg(mpu_irq[dev]);
int err;
int old = 0;
err = sc6000_dsp_reset(vport);
if (err < 0) {
snd_printk(KERN_ERR "sc6000_dsp_reset: failed!\n");
return err;
}
memset(answer, 0, sizeof(answer));
err = sc6000_dsp_get_answer(vport, GET_DSP_COPYRIGHT, answer, 15);
if (err <= 0) {
snd_printk(KERN_ERR "sc6000_dsp_copyright: failed!\n");
return -ENODEV;
}
/*
* My SC-6000 card return "SC-6000" in DSPCopyright, so
* if we have something different, we have to be warned.
*/
if (strncmp("SC-6000", answer, 7))
snd_printk(KERN_WARNING "Warning: non SC-6000 audio card!\n");
if (sc6000_dsp_get_answer(vport, GET_DSP_VERSION, version, 2) < 2) {
snd_printk(KERN_ERR "sc6000_dsp_version: failed!\n");
return -ENODEV;
}
printk(KERN_INFO PFX "Detected model: %s, DSP version %d.%d\n",
answer, version[0], version[1]);
/* set configuration */
sc6000_write(vport, COMMAND_5C);
if (sc6000_read(vport) < 0)
old = 1;
if (!old) {
int cfg[2];
sc6000_hw_cfg_encode(vport, &cfg[0], port[dev], mpu_port[dev],
mss_port[dev], joystick[dev]);
if (sc6000_hw_cfg_write(vport, cfg) < 0) {
snd_printk(KERN_ERR "sc6000_hw_cfg_write: failed!\n");
return -EIO;
}
}
err = sc6000_setup_board(vport, config);
if (err < 0) {
snd_printk(KERN_ERR "sc6000_setup_board: failed!\n");
return -ENODEV;
}
sc6000_dsp_reset(vport);
if (!old) {
sc6000_write(vport, COMMAND_60);
sc6000_write(vport, 0x02);
sc6000_dsp_reset(vport);
}
err = sc6000_setup_board(vport, config);
if (err < 0) {
snd_printk(KERN_ERR "sc6000_setup_board: failed!\n");
return -ENODEV;
}
err = sc6000_init_mss(vport, config, vmss_port, mss_config);
if (err < 0) {
snd_printk(KERN_ERR "Cannot initialize "
"Microsoft Sound System mode.\n");
return -ENODEV;
}
return 0;
}
static int snd_sc6000_mixer(struct snd_wss *chip)
{
struct snd_card *card = chip->card;
struct snd_ctl_elem_id id1, id2;
int err;
memset(&id1, 0, sizeof(id1));
memset(&id2, 0, sizeof(id2));
id1.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
/* reassign AUX0 to FM */
strcpy(id1.name, "Aux Playback Switch");
strcpy(id2.name, "FM Playback Switch");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0)
return err;
strcpy(id1.name, "Aux Playback Volume");
strcpy(id2.name, "FM Playback Volume");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0)
return err;
/* reassign AUX1 to CD */
strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
strcpy(id2.name, "CD Playback Switch");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0)
return err;
strcpy(id1.name, "Aux Playback Volume");
strcpy(id2.name, "CD Playback Volume");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0)
return err;
return 0;
}
static int snd_sc6000_match(struct device *devptr, unsigned int dev)
{
if (!enable[dev])
return 0;
if (port[dev] == SNDRV_AUTO_PORT) {
printk(KERN_ERR PFX "specify IO port\n");
return 0;
}
if (mss_port[dev] == SNDRV_AUTO_PORT) {
printk(KERN_ERR PFX "specify MSS port\n");
return 0;
}
if (port[dev] != 0x220 && port[dev] != 0x240) {
printk(KERN_ERR PFX "Port must be 0x220 or 0x240\n");
return 0;
}
if (mss_port[dev] != 0x530 && mss_port[dev] != 0xe80) {
printk(KERN_ERR PFX "MSS port must be 0x530 or 0xe80\n");
return 0;
}
if (irq[dev] != SNDRV_AUTO_IRQ && !sc6000_irq_to_softcfg(irq[dev])) {
printk(KERN_ERR PFX "invalid IRQ %d\n", irq[dev]);
return 0;
}
if (dma[dev] != SNDRV_AUTO_DMA && !sc6000_dma_to_softcfg(dma[dev])) {
printk(KERN_ERR PFX "invalid DMA %d\n", dma[dev]);
return 0;
}
if (mpu_port[dev] != SNDRV_AUTO_PORT &&
(mpu_port[dev] & ~0x30L) != 0x300) {
printk(KERN_ERR PFX "invalid MPU-401 port %lx\n",
mpu_port[dev]);
return 0;
}
if (mpu_port[dev] != SNDRV_AUTO_PORT &&
mpu_irq[dev] != SNDRV_AUTO_IRQ && mpu_irq[dev] != 0 &&
!sc6000_mpu_irq_to_softcfg(mpu_irq[dev])) {
printk(KERN_ERR PFX "invalid MPU-401 IRQ %d\n", mpu_irq[dev]);
return 0;
}
return 1;
}
static int snd_sc6000_probe(struct device *devptr, unsigned int dev)
{
static int possible_irqs[] = { 5, 7, 9, 10, 11, -1 };
static int possible_dmas[] = { 1, 3, 0, -1 };
int err;
int xirq = irq[dev];
int xdma = dma[dev];
struct snd_card *card;
struct snd_wss *chip;
struct snd_opl3 *opl3;
char __iomem **vport;
char __iomem *vmss_port;
err = snd_card_new(devptr, index[dev], id[dev], THIS_MODULE,
sizeof(vport), &card);
if (err < 0)
return err;
vport = card->private_data;
if (xirq == SNDRV_AUTO_IRQ) {
xirq = snd_legacy_find_free_irq(possible_irqs);
if (xirq < 0) {
snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
err = -EBUSY;
goto err_exit;
}
}
if (xdma == SNDRV_AUTO_DMA) {
xdma = snd_legacy_find_free_dma(possible_dmas);
if (xdma < 0) {
snd_printk(KERN_ERR PFX "unable to find a free DMA\n");
err = -EBUSY;
goto err_exit;
}
}
if (!request_region(port[dev], 0x10, DRV_NAME)) {
snd_printk(KERN_ERR PFX
"I/O port region is already in use.\n");
err = -EBUSY;
goto err_exit;
}
*vport = devm_ioport_map(devptr, port[dev], 0x10);
if (*vport == NULL) {
snd_printk(KERN_ERR PFX
"I/O port cannot be iomaped.\n");
err = -EBUSY;
goto err_unmap1;
}
/* to make it marked as used */
if (!request_region(mss_port[dev], 4, DRV_NAME)) {
snd_printk(KERN_ERR PFX
"SC-6000 port I/O port region is already in use.\n");
err = -EBUSY;
goto err_unmap1;
}
vmss_port = devm_ioport_map(devptr, mss_port[dev], 4);
if (!vmss_port) {
snd_printk(KERN_ERR PFX
"MSS port I/O cannot be iomaped.\n");
err = -EBUSY;
goto err_unmap2;
}
snd_printd("Initializing BASE[0x%lx] IRQ[%d] DMA[%d] MIRQ[%d]\n",
port[dev], xirq, xdma,
mpu_irq[dev] == SNDRV_AUTO_IRQ ? 0 : mpu_irq[dev]);
err = sc6000_init_board(*vport, vmss_port, dev);
if (err < 0)
goto err_unmap2;
err = snd_wss_create(card, mss_port[dev] + 4, -1, xirq, xdma, -1,
WSS_HW_DETECT, 0, &chip);
if (err < 0)
goto err_unmap2;
err = snd_wss_pcm(chip, 0);
if (err < 0) {
snd_printk(KERN_ERR PFX
"error creating new WSS PCM device\n");
goto err_unmap2;
}
err = snd_wss_mixer(chip);
if (err < 0) {
snd_printk(KERN_ERR PFX "error creating new WSS mixer\n");
goto err_unmap2;
}
err = snd_sc6000_mixer(chip);
if (err < 0) {
snd_printk(KERN_ERR PFX "the mixer rewrite failed\n");
goto err_unmap2;
}
if (snd_opl3_create(card,
0x388, 0x388 + 2,
OPL3_HW_AUTO, 0, &opl3) < 0) {
snd_printk(KERN_ERR PFX "no OPL device at 0x%x-0x%x ?\n",
0x388, 0x388 + 2);
} else {
err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
if (err < 0)
goto err_unmap2;
}
if (mpu_port[dev] != SNDRV_AUTO_PORT) {
if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
mpu_irq[dev] = -1;
if (snd_mpu401_uart_new(card, 0,
MPU401_HW_MPU401,
mpu_port[dev], 0,
mpu_irq[dev], NULL) < 0)
snd_printk(KERN_ERR "no MPU-401 device at 0x%lx ?\n",
mpu_port[dev]);
}
strcpy(card->driver, DRV_NAME);
strcpy(card->shortname, "SC-6000");
sprintf(card->longname, "Gallant SC-6000 at 0x%lx, irq %d, dma %d",
mss_port[dev], xirq, xdma);
err = snd_card_register(card);
if (err < 0)
goto err_unmap2;
dev_set_drvdata(devptr, card);
return 0;
err_unmap2:
sc6000_setup_board(*vport, 0);
release_region(mss_port[dev], 4);
err_unmap1:
release_region(port[dev], 0x10);
err_exit:
snd_card_free(card);
return err;
}
static int snd_sc6000_remove(struct device *devptr, unsigned int dev)
{
struct snd_card *card = dev_get_drvdata(devptr);
char __iomem **vport = card->private_data;
if (sc6000_setup_board(*vport, 0) < 0)
snd_printk(KERN_WARNING "sc6000_setup_board failed on exit!\n");
release_region(port[dev], 0x10);
release_region(mss_port[dev], 4);
snd_card_free(card);
return 0;
}
static struct isa_driver snd_sc6000_driver = {
.match = snd_sc6000_match,
.probe = snd_sc6000_probe,
.remove = snd_sc6000_remove,
/* FIXME: suspend/resume */
.driver = {
.name = DRV_NAME,
},
};
static int __init alsa_card_sc6000_init(void)
{
return isa_register_driver(&snd_sc6000_driver, SNDRV_CARDS);
}
static void __exit alsa_card_sc6000_exit(void)
{
isa_unregister_driver(&snd_sc6000_driver);
}
module_init(alsa_card_sc6000_init)
module_exit(alsa_card_sc6000_exit)
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