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cmi8328.c
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cmi8328.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for C-Media CMI8328-based soundcards, such as AudioExcel AV500
* Copyright (c) 2012 Ondrej Zary
*
* AudioExcel AV500 card consists of:
* - CMI8328 - main chip (SB Pro emulation, gameport, OPL3, MPU401, CD-ROM)
* - CS4231A - WSS codec
* - Dream SAM9233+GMS950400+RAM+ROM: Wavetable MIDI, connected to MPU401
*/
#include <linux/init.h>
#include <linux/isa.h>
#include <linux/module.h>
#include <linux/gameport.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/wss.h>
#include <sound/opl3.h>
#include <sound/mpu401.h>
#define SNDRV_LEGACY_FIND_FREE_IOPORT
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>
MODULE_AUTHOR("Ondrej Zary <[email protected]>");
MODULE_DESCRIPTION("C-Media CMI8328");
MODULE_LICENSE("GPL");
#if IS_ENABLED(CONFIG_GAMEPORT)
#define SUPPORT_JOYSTICK 1
#endif
/* I/O port is configured by jumpers on the card to one of these */
static const int cmi8328_ports[] = { 0x530, 0xe80, 0xf40, 0x604 };
#define CMI8328_MAX ARRAY_SIZE(cmi8328_ports)
static int index[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = -1};
static char *id[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = NULL};
static long port[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_PORT};
static int irq[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_IRQ};
static int dma1[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_DMA};
static int dma2[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_DMA};
static long mpuport[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_PORT};
static int mpuirq[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_IRQ};
#ifdef SUPPORT_JOYSTICK
static bool gameport[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = true};
#endif
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for CMI8328 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for CMI8328 soundcard.");
module_param_hw_array(port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for CMI8328 driver.");
module_param_hw_array(irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for CMI8328 driver.");
module_param_hw_array(dma1, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 for CMI8328 driver.");
module_param_hw_array(dma2, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 for CMI8328 driver.");
module_param_hw_array(mpuport, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mpuport, "MPU-401 port # for CMI8328 driver.");
module_param_hw_array(mpuirq, int, irq, NULL, 0444);
MODULE_PARM_DESC(mpuirq, "IRQ # for CMI8328 MPU-401 port.");
#ifdef SUPPORT_JOYSTICK
module_param_array(gameport, bool, NULL, 0444);
MODULE_PARM_DESC(gameport, "Enable gameport.");
#endif
struct snd_cmi8328 {
u16 port;
u8 cfg[3];
u8 wss_cfg;
struct snd_card *card;
struct snd_wss *wss;
#ifdef SUPPORT_JOYSTICK
struct gameport *gameport;
#endif
};
/* CMI8328 configuration registers */
#define CFG1 0x61
#define CFG1_SB_DISABLE (1 << 0)
#define CFG1_GAMEPORT (1 << 1)
/*
* bit 0: SB: 0=enabled, 1=disabled
* bit 1: gameport: 0=disabled, 1=enabled
* bits 2-4: SB IRQ: 001=3, 010=5, 011=7, 100=9, 101=10, 110=11
* bits 5-6: SB DMA: 00=disabled (when SB disabled), 01=DMA0, 10=DMA1, 11=DMA3
* bit 7: SB port: 0=0x220, 1=0x240
*/
#define CFG2 0x62
#define CFG2_MPU_ENABLE (1 << 2)
/*
* bits 0-1: CD-ROM mode: 00=disabled, 01=Panasonic, 10=Sony/Mitsumi/Wearnes,
11=IDE
* bit 2: MPU401: 0=disabled, 1=enabled
* bits 3-4: MPU401 IRQ: 00=3, 01=5, 10=7, 11=9,
* bits 5-7: MPU401 port: 000=0x300, 001=0x310, 010=0x320, 011=0x330, 100=0x332,
101=0x334, 110=0x336
*/
#define CFG3 0x63
/*
* bits 0-2: CD-ROM IRQ: 000=disabled, 001=3, 010=5, 011=7, 100=9, 101=10,
110=11
* bits 3-4: CD-ROM DMA: 00=disabled, 01=DMA0, 10=DMA1, 11=DMA3
* bits 5-7: CD-ROM port: 000=0x300, 001=0x310, 010=0x320, 011=0x330, 100=0x340,
101=0x350, 110=0x360, 111=0x370
*/
static u8 snd_cmi8328_cfg_read(u16 port, u8 reg)
{
outb(0x43, port + 3);
outb(0x21, port + 3);
outb(reg, port + 3);
return inb(port);
}
static void snd_cmi8328_cfg_write(u16 port, u8 reg, u8 val)
{
outb(0x43, port + 3);
outb(0x21, port + 3);
outb(reg, port + 3);
outb(val, port + 3); /* yes, value goes to the same port as index */
}
#ifdef CONFIG_PM
static void snd_cmi8328_cfg_save(u16 port, u8 cfg[])
{
cfg[0] = snd_cmi8328_cfg_read(port, CFG1);
cfg[1] = snd_cmi8328_cfg_read(port, CFG2);
cfg[2] = snd_cmi8328_cfg_read(port, CFG3);
}
static void snd_cmi8328_cfg_restore(u16 port, u8 cfg[])
{
snd_cmi8328_cfg_write(port, CFG1, cfg[0]);
snd_cmi8328_cfg_write(port, CFG2, cfg[1]);
snd_cmi8328_cfg_write(port, CFG3, cfg[2]);
}
#endif /* CONFIG_PM */
static int snd_cmi8328_mixer(struct snd_wss *chip)
{
struct snd_card *card;
struct snd_ctl_elem_id id1, id2;
int err;
card = chip->card;
memset(&id1, 0, sizeof(id1));
memset(&id2, 0, sizeof(id2));
id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
/* rename AUX0 switch to CD */
strcpy(id1.name, "Aux Playback Switch");
strcpy(id2.name, "CD Playback Switch");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0) {
snd_printk(KERN_ERR "error renaming control\n");
return err;
}
/* rename AUX0 volume to CD */
strcpy(id1.name, "Aux Playback Volume");
strcpy(id2.name, "CD Playback Volume");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0) {
snd_printk(KERN_ERR "error renaming control\n");
return err;
}
/* rename AUX1 switch to Synth */
strcpy(id1.name, "Aux Playback Switch");
id1.index = 1;
strcpy(id2.name, "Synth Playback Switch");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0) {
snd_printk(KERN_ERR "error renaming control\n");
return err;
}
/* rename AUX1 volume to Synth */
strcpy(id1.name, "Aux Playback Volume");
id1.index = 1;
strcpy(id2.name, "Synth Playback Volume");
err = snd_ctl_rename_id(card, &id1, &id2);
if (err < 0) {
snd_printk(KERN_ERR "error renaming control\n");
return err;
}
return 0;
}
/* find index of an item in "-1"-ended array */
static int array_find(const int array[], int item)
{
int i;
for (i = 0; array[i] != -1; i++)
if (array[i] == item)
return i;
return -1;
}
/* the same for long */
static int array_find_l(const long array[], long item)
{
int i;
for (i = 0; array[i] != -1; i++)
if (array[i] == item)
return i;
return -1;
}
static int snd_cmi8328_probe(struct device *pdev, unsigned int ndev)
{
struct snd_card *card;
struct snd_opl3 *opl3;
struct snd_cmi8328 *cmi;
#ifdef SUPPORT_JOYSTICK
struct resource *res;
#endif
int err, pos;
static const long mpu_ports[] = { 0x330, 0x300, 0x310, 0x320, 0x332, 0x334,
0x336, -1 };
static const u8 mpu_port_bits[] = { 3, 0, 1, 2, 4, 5, 6 };
static const int mpu_irqs[] = { 9, 7, 5, 3, -1 };
static const u8 mpu_irq_bits[] = { 3, 2, 1, 0 };
static const int irqs[] = { 9, 10, 11, 7, -1 };
static const u8 irq_bits[] = { 2, 3, 4, 1 };
static const int dma1s[] = { 3, 1, 0, -1 };
static const u8 dma_bits[] = { 3, 2, 1 };
static const int dma2s[][2] = { {1, -1}, {0, -1}, {-1, -1}, {0, -1} };
u16 port = cmi8328_ports[ndev];
u8 val;
/* 0xff is invalid configuration (but settable - hope it isn't set) */
if (snd_cmi8328_cfg_read(port, CFG1) == 0xff)
return -ENODEV;
/* the SB disable bit must NEVER EVER be cleared or the WSS dies */
snd_cmi8328_cfg_write(port, CFG1, CFG1_SB_DISABLE);
if (snd_cmi8328_cfg_read(port, CFG1) != CFG1_SB_DISABLE)
return -ENODEV;
/* disable everything first */
snd_cmi8328_cfg_write(port, CFG2, 0); /* disable CDROM and MPU401 */
snd_cmi8328_cfg_write(port, CFG3, 0); /* disable CDROM IRQ and DMA */
if (irq[ndev] == SNDRV_AUTO_IRQ) {
irq[ndev] = snd_legacy_find_free_irq(irqs);
if (irq[ndev] < 0) {
snd_printk(KERN_ERR "unable to find a free IRQ\n");
return -EBUSY;
}
}
if (dma1[ndev] == SNDRV_AUTO_DMA) {
dma1[ndev] = snd_legacy_find_free_dma(dma1s);
if (dma1[ndev] < 0) {
snd_printk(KERN_ERR "unable to find a free DMA1\n");
return -EBUSY;
}
}
if (dma2[ndev] == SNDRV_AUTO_DMA) {
dma2[ndev] = snd_legacy_find_free_dma(dma2s[dma1[ndev] % 4]);
if (dma2[ndev] < 0) {
snd_printk(KERN_WARNING "unable to find a free DMA2, full-duplex will not work\n");
dma2[ndev] = -1;
}
}
/* configure WSS IRQ... */
pos = array_find(irqs, irq[ndev]);
if (pos < 0) {
snd_printk(KERN_ERR "invalid IRQ %d\n", irq[ndev]);
return -EINVAL;
}
val = irq_bits[pos] << 3;
/* ...and DMA... */
pos = array_find(dma1s, dma1[ndev]);
if (pos < 0) {
snd_printk(KERN_ERR "invalid DMA1 %d\n", dma1[ndev]);
return -EINVAL;
}
val |= dma_bits[pos];
/* ...and DMA2 */
if (dma2[ndev] >= 0 && dma1[ndev] != dma2[ndev]) {
pos = array_find(dma2s[dma1[ndev]], dma2[ndev]);
if (pos < 0) {
snd_printk(KERN_ERR "invalid DMA2 %d\n", dma2[ndev]);
return -EINVAL;
}
val |= 0x04; /* enable separate capture DMA */
}
outb(val, port);
err = snd_card_new(pdev, index[ndev], id[ndev], THIS_MODULE,
sizeof(struct snd_cmi8328), &card);
if (err < 0)
return err;
cmi = card->private_data;
cmi->card = card;
cmi->port = port;
cmi->wss_cfg = val;
err = snd_wss_create(card, port + 4, -1, irq[ndev], dma1[ndev],
dma2[ndev], WSS_HW_DETECT, 0, &cmi->wss);
if (err < 0)
goto error;
err = snd_wss_pcm(cmi->wss, 0);
if (err < 0)
goto error;
err = snd_wss_mixer(cmi->wss);
if (err < 0)
goto error;
err = snd_cmi8328_mixer(cmi->wss);
if (err < 0)
goto error;
if (snd_wss_timer(cmi->wss, 0) < 0)
snd_printk(KERN_WARNING "error initializing WSS timer\n");
if (mpuport[ndev] == SNDRV_AUTO_PORT) {
mpuport[ndev] = snd_legacy_find_free_ioport(mpu_ports, 2);
if (mpuport[ndev] < 0)
snd_printk(KERN_ERR "unable to find a free MPU401 port\n");
}
if (mpuirq[ndev] == SNDRV_AUTO_IRQ) {
mpuirq[ndev] = snd_legacy_find_free_irq(mpu_irqs);
if (mpuirq[ndev] < 0)
snd_printk(KERN_ERR "unable to find a free MPU401 IRQ\n");
}
/* enable and configure MPU401 */
if (mpuport[ndev] > 0 && mpuirq[ndev] > 0) {
val = CFG2_MPU_ENABLE;
pos = array_find_l(mpu_ports, mpuport[ndev]);
if (pos < 0)
snd_printk(KERN_WARNING "invalid MPU401 port 0x%lx\n",
mpuport[ndev]);
else {
val |= mpu_port_bits[pos] << 5;
pos = array_find(mpu_irqs, mpuirq[ndev]);
if (pos < 0)
snd_printk(KERN_WARNING "invalid MPU401 IRQ %d\n",
mpuirq[ndev]);
else {
val |= mpu_irq_bits[pos] << 3;
snd_cmi8328_cfg_write(port, CFG2, val);
if (snd_mpu401_uart_new(card, 0,
MPU401_HW_MPU401, mpuport[ndev],
0, mpuirq[ndev], NULL) < 0)
snd_printk(KERN_ERR "error initializing MPU401\n");
}
}
}
/* OPL3 is hardwired to 0x388 and cannot be disabled */
if (snd_opl3_create(card, 0x388, 0x38a, OPL3_HW_AUTO, 0, &opl3) < 0)
snd_printk(KERN_ERR "error initializing OPL3\n");
else
if (snd_opl3_hwdep_new(opl3, 0, 1, NULL) < 0)
snd_printk(KERN_WARNING "error initializing OPL3 hwdep\n");
strcpy(card->driver, "CMI8328");
strcpy(card->shortname, "C-Media CMI8328");
sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d,%d",
card->shortname, cmi->wss->port, irq[ndev], dma1[ndev],
(dma2[ndev] >= 0) ? dma2[ndev] : dma1[ndev]);
dev_set_drvdata(pdev, card);
err = snd_card_register(card);
if (err < 0)
goto error;
#ifdef SUPPORT_JOYSTICK
if (!gameport[ndev])
return 0;
/* gameport is hardwired to 0x200 */
res = request_region(0x200, 8, "CMI8328 gameport");
if (!res)
snd_printk(KERN_WARNING "unable to allocate gameport I/O port\n");
else {
struct gameport *gp = cmi->gameport = gameport_allocate_port();
if (!cmi->gameport)
release_and_free_resource(res);
else {
gameport_set_name(gp, "CMI8328 Gameport");
gameport_set_phys(gp, "%s/gameport0", dev_name(pdev));
gameport_set_dev_parent(gp, pdev);
gp->io = 0x200;
gameport_set_port_data(gp, res);
/* Enable gameport */
snd_cmi8328_cfg_write(port, CFG1,
CFG1_SB_DISABLE | CFG1_GAMEPORT);
gameport_register_port(gp);
}
}
#endif
return 0;
error:
snd_card_free(card);
return err;
}
static int snd_cmi8328_remove(struct device *pdev, unsigned int dev)
{
struct snd_card *card = dev_get_drvdata(pdev);
struct snd_cmi8328 *cmi = card->private_data;
#ifdef SUPPORT_JOYSTICK
if (cmi->gameport) {
struct resource *res = gameport_get_port_data(cmi->gameport);
gameport_unregister_port(cmi->gameport);
release_and_free_resource(res);
}
#endif
/* disable everything */
snd_cmi8328_cfg_write(cmi->port, CFG1, CFG1_SB_DISABLE);
snd_cmi8328_cfg_write(cmi->port, CFG2, 0);
snd_cmi8328_cfg_write(cmi->port, CFG3, 0);
snd_card_free(card);
return 0;
}
#ifdef CONFIG_PM
static int snd_cmi8328_suspend(struct device *pdev, unsigned int n,
pm_message_t state)
{
struct snd_card *card = dev_get_drvdata(pdev);
struct snd_cmi8328 *cmi;
if (!card) /* ignore absent devices */
return 0;
cmi = card->private_data;
snd_cmi8328_cfg_save(cmi->port, cmi->cfg);
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
cmi->wss->suspend(cmi->wss);
return 0;
}
static int snd_cmi8328_resume(struct device *pdev, unsigned int n)
{
struct snd_card *card = dev_get_drvdata(pdev);
struct snd_cmi8328 *cmi;
if (!card) /* ignore absent devices */
return 0;
cmi = card->private_data;
snd_cmi8328_cfg_restore(cmi->port, cmi->cfg);
outb(cmi->wss_cfg, cmi->port);
cmi->wss->resume(cmi->wss);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif
static struct isa_driver snd_cmi8328_driver = {
.probe = snd_cmi8328_probe,
.remove = snd_cmi8328_remove,
#ifdef CONFIG_PM
.suspend = snd_cmi8328_suspend,
.resume = snd_cmi8328_resume,
#endif
.driver = {
.name = "cmi8328"
},
};
module_isa_driver(snd_cmi8328_driver, CMI8328_MAX);