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android_kernel_xiaomi_sm8350/sound/isa/gus/gusmax.c
Jeff Garzik c7bec5aba5 Various drivers' irq handlers: kill dead code, needless casts 
- Eliminate casts to/from void*

- Eliminate checks for conditions that never occur.  These typically
  fall into two classes:

	1) Checking for 'dev_id == NULL', then it is never called with
	NULL as an argument.

	2) Checking for invalid irq number, when the only caller (the
	system) guarantees the irq handler is called with the proper
	'irq' number argument.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-06 15:00:58 -04:00

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/*
* Driver for Gravis UltraSound MAX soundcard
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
*
*
* 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 <sound/driver.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/cs4231.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Gravis UltraSound MAX");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound MAX}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220,0x230,0x240,0x250,0x260 */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 2,3,5,9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 1,3,5,6,7 */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 1,3,5,6,7 */
static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
/* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for GUS MAX soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for GUS MAX soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable GUS MAX soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for GUS MAX driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for GUS MAX driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for GUS MAX driver.");
module_param_array(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 # for GUS MAX driver.");
module_param_array(joystick_dac, int, NULL, 0444);
MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver.");
module_param_array(channels, int, NULL, 0444);
MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
module_param_array(pcm_channels, int, NULL, 0444);
MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");
static struct platform_device *devices[SNDRV_CARDS];
struct snd_gusmax {
int irq;
struct snd_card *card;
struct snd_gus_card *gus;
struct snd_cs4231 *cs4231;
unsigned short gus_status_reg;
unsigned short pcm_status_reg;
};
#define PFX "gusmax: "
static int __init snd_gusmax_detect(struct snd_gus_card * gus)
{
unsigned char d;
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0); /* reset GF1 */
if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
snd_printdd("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
return -ENODEV;
}
udelay(160);
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* release reset */
udelay(160);
if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
snd_printdd("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
return -ENODEV;
}
return 0;
}
static irqreturn_t snd_gusmax_interrupt(int irq, void *dev_id)
{
struct snd_gusmax *maxcard = dev_id;
int loop, max = 5;
int handled = 0;
do {
loop = 0;
if (inb(maxcard->gus_status_reg)) {
handled = 1;
snd_gus_interrupt(irq, maxcard->gus);
loop++;
}
if (inb(maxcard->pcm_status_reg) & 0x01) { /* IRQ bit is set? */
handled = 1;
snd_cs4231_interrupt(irq, maxcard->cs4231);
loop++;
}
} while (loop && --max > 0);
return IRQ_RETVAL(handled);
}
static void __init snd_gusmax_init(int dev, struct snd_card *card, struct snd_gus_card * gus)
{
gus->equal_irq = 1;
gus->codec_flag = 1;
gus->joystick_dac = joystick_dac[dev];
/* init control register */
gus->max_cntrl_val = (gus->gf1.port >> 4) & 0x0f;
if (gus->gf1.dma1 > 3)
gus->max_cntrl_val |= 0x10;
if (gus->gf1.dma2 > 3)
gus->max_cntrl_val |= 0x20;
gus->max_cntrl_val |= 0x40;
outb(gus->max_cntrl_val, GUSP(gus, MAXCNTRLPORT));
}
#define CS4231_PRIVATE( left, right, shift, mute ) \
((left << 24)|(right << 16)|(shift<<8)|mute)
static int __init snd_gusmax_mixer(struct snd_cs4231 *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 = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
/* reassign AUXA to SYNTHESIZER */
strcpy(id1.name, "Aux Playback Switch");
strcpy(id2.name, "Synth Playback Switch");
if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
return err;
strcpy(id1.name, "Aux Playback Volume");
strcpy(id2.name, "Synth Playback Volume");
if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
return err;
/* reassign AUXB to CD */
strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
strcpy(id2.name, "CD Playback Switch");
if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
return err;
strcpy(id1.name, "Aux Playback Volume");
strcpy(id2.name, "CD Playback Volume");
if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
return err;
#if 0
/* reassign Mono Input to MIC */
if (snd_mixer_group_rename(mixer,
SNDRV_MIXER_IN_MONO, 0,
SNDRV_MIXER_IN_MIC, 0) < 0)
goto __error;
if (snd_mixer_elem_rename(mixer,
SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_ETYPE_INPUT,
SNDRV_MIXER_IN_MIC, 0) < 0)
goto __error;
if (snd_mixer_elem_rename(mixer,
"Mono Capture Volume", 0, SNDRV_MIXER_ETYPE_VOLUME1,
"Mic Capture Volume", 0) < 0)
goto __error;
if (snd_mixer_elem_rename(mixer,
"Mono Capture Switch", 0, SNDRV_MIXER_ETYPE_SWITCH1,
"Mic Capture Switch", 0) < 0)
goto __error;
#endif
return 0;
}
static void snd_gusmax_free(struct snd_card *card)
{
struct snd_gusmax *maxcard = (struct snd_gusmax *)card->private_data;
if (maxcard == NULL)
return;
if (maxcard->irq >= 0)
free_irq(maxcard->irq, (void *)maxcard);
}
static int __init snd_gusmax_probe(struct platform_device *pdev)
{
int dev = pdev->id;
static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
static int possible_dmas[] = {5, 6, 7, 1, 3, -1};
int xirq, xdma1, xdma2, err;
struct snd_card *card;
struct snd_gus_card *gus = NULL;
struct snd_cs4231 *cs4231;
struct snd_gusmax *maxcard;
card = snd_card_new(index[dev], id[dev], THIS_MODULE,
sizeof(struct snd_gusmax));
if (card == NULL)
return -ENOMEM;
card->private_free = snd_gusmax_free;
maxcard = (struct snd_gusmax *)card->private_data;
maxcard->card = card;
maxcard->irq = -1;
xirq = irq[dev];
if (xirq == SNDRV_AUTO_IRQ) {
if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
err = -EBUSY;
goto _err;
}
}
xdma1 = dma1[dev];
if (xdma1 == SNDRV_AUTO_DMA) {
if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
snd_printk(KERN_ERR PFX "unable to find a free DMA1\n");
err = -EBUSY;
goto _err;
}
}
xdma2 = dma2[dev];
if (xdma2 == SNDRV_AUTO_DMA) {
if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
snd_printk(KERN_ERR PFX "unable to find a free DMA2\n");
err = -EBUSY;
goto _err;
}
}
if (port[dev] != SNDRV_AUTO_PORT) {
err = snd_gus_create(card,
port[dev],
-xirq, xdma1, xdma2,
0, channels[dev],
pcm_channels[dev],
0, &gus);
} else {
static unsigned long possible_ports[] = {
0x220, 0x230, 0x240, 0x250, 0x260
};
int i;
for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
err = snd_gus_create(card,
possible_ports[i],
-xirq, xdma1, xdma2,
0, channels[dev],
pcm_channels[dev],
0, &gus);
if (err >= 0) {
port[dev] = possible_ports[i];
break;
}
}
}
if (err < 0)
goto _err;
if ((err = snd_gusmax_detect(gus)) < 0)
goto _err;
maxcard->gus_status_reg = gus->gf1.reg_irqstat;
maxcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;
snd_gusmax_init(dev, card, gus);
if ((err = snd_gus_initialize(gus)) < 0)
goto _err;
if (!gus->max_flag) {
snd_printk(KERN_ERR PFX "GUS MAX soundcard was not detected at 0x%lx\n", gus->gf1.port);
err = -ENODEV;
goto _err;
}
if (request_irq(xirq, snd_gusmax_interrupt, IRQF_DISABLED, "GUS MAX", (void *)maxcard)) {
snd_printk(KERN_ERR PFX "unable to grab IRQ %d\n", xirq);
err = -EBUSY;
goto _err;
}
maxcard->irq = xirq;
if ((err = snd_cs4231_create(card,
gus->gf1.port + 0x10c, -1, xirq,
xdma2 < 0 ? xdma1 : xdma2, xdma1,
CS4231_HW_DETECT,
CS4231_HWSHARE_IRQ |
CS4231_HWSHARE_DMA1 |
CS4231_HWSHARE_DMA2,
&cs4231)) < 0)
goto _err;
if ((err = snd_cs4231_pcm(cs4231, 0, NULL)) < 0)
goto _err;
if ((err = snd_cs4231_mixer(cs4231)) < 0)
goto _err;
if ((err = snd_cs4231_timer(cs4231, 2, NULL)) < 0)
goto _err;
if (pcm_channels[dev] > 0) {
if ((err = snd_gf1_pcm_new(gus, 1, 1, NULL)) < 0)
goto _err;
}
if ((err = snd_gusmax_mixer(cs4231)) < 0)
goto _err;
if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0)
goto _err;
sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %i, dma %i", gus->gf1.port, xirq, xdma1);
if (xdma2 >= 0)
sprintf(card->longname + strlen(card->longname), "&%i", xdma2);
snd_card_set_dev(card, &pdev->dev);
if ((err = snd_card_register(card)) < 0)
goto _err;
maxcard->gus = gus;
maxcard->cs4231 = cs4231;
platform_set_drvdata(pdev, card);
return 0;
_err:
snd_card_free(card);
return err;
}
static int snd_gusmax_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
platform_set_drvdata(devptr, NULL);
return 0;
}
#define GUSMAX_DRIVER "snd_gusmax"
static struct platform_driver snd_gusmax_driver = {
.probe = snd_gusmax_probe,
.remove = snd_gusmax_remove,
/* FIXME: suspend/resume */
.driver = {
.name = GUSMAX_DRIVER
},
};
static void __init_or_module snd_gusmax_unregister_all(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(devices); ++i)
platform_device_unregister(devices[i]);
platform_driver_unregister(&snd_gusmax_driver);
}
static int __init alsa_card_gusmax_init(void)
{
int i, cards, err;
err = platform_driver_register(&snd_gusmax_driver);
if (err < 0)
return err;
cards = 0;
for (i = 0; i < SNDRV_CARDS; i++) {
struct platform_device *device;
if (! enable[i])
continue;
device = platform_device_register_simple(GUSMAX_DRIVER,
i, NULL, 0);
if (IS_ERR(device))
continue;
if (!platform_get_drvdata(device)) {
platform_device_unregister(device);
continue;
}
devices[i] = device;
cards++;
}
if (!cards) {
#ifdef MODULE
printk(KERN_ERR "GUS MAX soundcard not found or device busy\n");
#endif
snd_gusmax_unregister_all();
return -ENODEV;
}
return 0;
}
static void __exit alsa_card_gusmax_exit(void)
{
snd_gusmax_unregister_all();
}
module_init(alsa_card_gusmax_init)
module_exit(alsa_card_gusmax_exit)
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