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linux/sound/isa/sc6000.c
Takashi Iwai f976e8a941 ALSA: sc6000: Use explicit cast for __iomem pointer 
The recent optimization to store an iomem pointer in card's
private_data field caused sparse warnings.  Although they are
practically harmless, add the explicit cast for avoiding the spurious
warnings.

Fixes: 9b7843d1e1 ("ALSA: sc6000: Assign vport directly on card's private_data")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202107210511.SnFqlZMa-lkp@intel.com
Link: https://lore.kernel.org/r/20210720224902.7169-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-07-21 00:49:46 +02:00

676 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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.
*/
#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");
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_hw_array(port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for sc-6000 driver.");
module_param_hw_array(mss_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mss_port, "MSS Port # for sc-6000 driver.");
module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for sc-6000 driver.");
module_param_hw_array(irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for sc-6000 driver.");
module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for sc-6000 driver.");
module_param_hw_array(dma, int, dma, 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 void snd_sc6000_free(struct snd_card *card)
{
char __iomem *vport = (char __force __iomem *)card->private_data;
if (vport)
sc6000_setup_board(vport, 0);
}
static int snd_sc6000_probe(struct device *devptr, unsigned int dev)
{
static const int possible_irqs[] = { 5, 7, 9, 10, 11, -1 };
static const 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_devm_card_new(devptr, index[dev], id[dev], THIS_MODULE,
0, &card);
if (err < 0)
return err;
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");
return -EBUSY;
}
}
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");
return -EBUSY;
}
}
if (!devm_request_region(devptr, port[dev], 0x10, DRV_NAME)) {
snd_printk(KERN_ERR PFX
"I/O port region is already in use.\n");
return -EBUSY;
}
vport = devm_ioport_map(devptr, port[dev], 0x10);
if (!vport) {
snd_printk(KERN_ERR PFX
"I/O port cannot be iomapped.\n");
return -EBUSY;
}
card->private_data = (void __force *)vport;
/* to make it marked as used */
if (!devm_request_region(devptr, mss_port[dev], 4, DRV_NAME)) {
snd_printk(KERN_ERR PFX
"SC-6000 port I/O port region is already in use.\n");
return -EBUSY;
}
vmss_port = devm_ioport_map(devptr, mss_port[dev], 4);
if (!vmss_port) {
snd_printk(KERN_ERR PFX
"MSS port I/O cannot be iomapped.\n");
return -EBUSY;
}
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)
return err;
card->private_free = snd_sc6000_free;
err = snd_wss_create(card, mss_port[dev] + 4, -1, xirq, xdma, -1,
WSS_HW_DETECT, 0, &chip);
if (err < 0)
return err;
err = snd_wss_pcm(chip, 0);
if (err < 0) {
snd_printk(KERN_ERR PFX
"error creating new WSS PCM device\n");
return err;
}
err = snd_wss_mixer(chip);
if (err < 0) {
snd_printk(KERN_ERR PFX "error creating new WSS mixer\n");
return err;
}
err = snd_sc6000_mixer(chip);
if (err < 0) {
snd_printk(KERN_ERR PFX "the mixer rewrite failed\n");
return err;
}
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)
return err;
}
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)
return err;
dev_set_drvdata(devptr, card);
return 0;
}
static struct isa_driver snd_sc6000_driver = {
.match = snd_sc6000_match,
.probe = snd_sc6000_probe,
/* FIXME: suspend/resume */
.driver = {
.name = DRV_NAME,
},
};
module_isa_driver(snd_sc6000_driver, SNDRV_CARDS);
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