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Diffstat (limited to 'sound/isa/sb/sb_common.c')
-rw-r--r--sound/isa/sb/sb_common.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/sound/isa/sb/sb_common.c b/sound/isa/sb/sb_common.c
new file mode 100644
index 000000000000..5b6bde213ea0
--- /dev/null
+++ b/sound/isa/sb/sb_common.c
@@ -0,0 +1,313 @@
+/*
+ * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Uros Bizjak <uros@kss-loka.si>
+ *
+ * Lowlevel routines for control of Sound Blaster cards
+ *
+ * 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/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <sound/core.h>
+#include <sound/sb.h>
+#include <sound/initval.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
+MODULE_LICENSE("GPL");
+
+#define BUSY_LOOPS 100000
+
+#undef IO_DEBUG
+
+int snd_sbdsp_command(sb_t *chip, unsigned char val)
+{
+ int i;
+#ifdef IO_DEBUG
+ snd_printk("command 0x%x\n", val);
+#endif
+ for (i = BUSY_LOOPS; i; i--)
+ if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
+ outb(val, SBP(chip, COMMAND));
+ return 1;
+ }
+ snd_printd("%s [0x%lx]: timeout (0x%x)\n", __FUNCTION__, chip->port, val);
+ return 0;
+}
+
+int snd_sbdsp_get_byte(sb_t *chip)
+{
+ int val;
+ int i;
+ for (i = BUSY_LOOPS; i; i--) {
+ if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
+ val = inb(SBP(chip, READ));
+#ifdef IO_DEBUG
+ snd_printk("get_byte 0x%x\n", val);
+#endif
+ return val;
+ }
+ }
+ snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port);
+ return -ENODEV;
+}
+
+int snd_sbdsp_reset(sb_t *chip)
+{
+ int i;
+
+ outb(1, SBP(chip, RESET));
+ udelay(10);
+ outb(0, SBP(chip, RESET));
+ udelay(30);
+ for (i = BUSY_LOOPS; i; i--)
+ if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
+ if (inb(SBP(chip, READ)) == 0xaa)
+ return 0;
+ else
+ break;
+ }
+ snd_printdd("%s [0x%lx] failed...\n", __FUNCTION__, chip->port);
+ return -ENODEV;
+}
+
+static int snd_sbdsp_version(sb_t * chip)
+{
+ unsigned int result = -ENODEV;
+
+ snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
+ result = (short) snd_sbdsp_get_byte(chip) << 8;
+ result |= (short) snd_sbdsp_get_byte(chip);
+ return result;
+}
+
+static int snd_sbdsp_probe(sb_t * chip)
+{
+ int version;
+ int major, minor;
+ char *str;
+ unsigned long flags;
+
+ /*
+ * initialization sequence
+ */
+
+ spin_lock_irqsave(&chip->reg_lock, flags);
+ if (snd_sbdsp_reset(chip) < 0) {
+ spin_unlock_irqrestore(&chip->reg_lock, flags);
+ return -ENODEV;
+ }
+ version = snd_sbdsp_version(chip);
+ if (version < 0) {
+ spin_unlock_irqrestore(&chip->reg_lock, flags);
+ return -ENODEV;
+ }
+ spin_unlock_irqrestore(&chip->reg_lock, flags);
+ major = version >> 8;
+ minor = version & 0xff;
+ snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
+ chip->port, major, minor);
+
+ switch (chip->hardware) {
+ case SB_HW_AUTO:
+ switch (major) {
+ case 1:
+ chip->hardware = SB_HW_10;
+ str = "1.0";
+ break;
+ case 2:
+ if (minor) {
+ chip->hardware = SB_HW_201;
+ str = "2.01+";
+ } else {
+ chip->hardware = SB_HW_20;
+ str = "2.0";
+ }
+ break;
+ case 3:
+ chip->hardware = SB_HW_PRO;
+ str = "Pro";
+ break;
+ case 4:
+ chip->hardware = SB_HW_16;
+ str = "16";
+ break;
+ default:
+ snd_printk("SB [0x%lx]: unknown DSP chip version %i.%i\n",
+ chip->port, major, minor);
+ return -ENODEV;
+ }
+ break;
+ case SB_HW_ALS100:
+ str = "16 (ALS-100)";
+ break;
+ case SB_HW_ALS4000:
+ str = "16 (ALS-4000)";
+ break;
+ case SB_HW_DT019X:
+ str = "(DT019X/ALS007)";
+ break;
+ default:
+ return -ENODEV;
+ }
+ sprintf(chip->name, "Sound Blaster %s", str);
+ chip->version = (major << 8) | minor;
+ return 0;
+}
+
+static int snd_sbdsp_free(sb_t *chip)
+{
+ if (chip->res_port) {
+ release_resource(chip->res_port);
+ kfree_nocheck(chip->res_port);
+ }
+ if (chip->irq >= 0)
+ free_irq(chip->irq, (void *) chip);
+#ifdef CONFIG_ISA
+ if (chip->dma8 >= 0) {
+ disable_dma(chip->dma8);
+ free_dma(chip->dma8);
+ }
+ if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
+ disable_dma(chip->dma16);
+ free_dma(chip->dma16);
+ }
+#endif
+ kfree(chip);
+ return 0;
+}
+
+static int snd_sbdsp_dev_free(snd_device_t *device)
+{
+ sb_t *chip = device->device_data;
+ return snd_sbdsp_free(chip);
+}
+
+int snd_sbdsp_create(snd_card_t *card,
+ unsigned long port,
+ int irq,
+ irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
+ int dma8,
+ int dma16,
+ unsigned short hardware,
+ sb_t **r_chip)
+{
+ sb_t *chip;
+ int err;
+ static snd_device_ops_t ops = {
+ .dev_free = snd_sbdsp_dev_free,
+ };
+
+ snd_assert(r_chip != NULL, return -EINVAL);
+ *r_chip = NULL;
+ chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL)
+ return -ENOMEM;
+ spin_lock_init(&chip->reg_lock);
+ spin_lock_init(&chip->open_lock);
+ spin_lock_init(&chip->midi_input_lock);
+ spin_lock_init(&chip->mixer_lock);
+ chip->irq = -1;
+ chip->dma8 = -1;
+ chip->dma16 = -1;
+ chip->port = port;
+
+ if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
+ SA_INTERRUPT | SA_SHIRQ : SA_INTERRUPT,
+ "SoundBlaster", (void *) chip)) {
+ snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
+ snd_sbdsp_free(chip);
+ return -EBUSY;
+ }
+ chip->irq = irq;
+
+ if (hardware == SB_HW_ALS4000)
+ goto __skip_allocation;
+
+ if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
+ snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
+ snd_sbdsp_free(chip);
+ return -EBUSY;
+ }
+
+#ifdef CONFIG_ISA
+ if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
+ snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
+ snd_sbdsp_free(chip);
+ return -EBUSY;
+ }
+ chip->dma8 = dma8;
+ if (dma16 >= 0) {
+ if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
+ /* no duplex */
+ dma16 = -1;
+ } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
+ snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
+ snd_sbdsp_free(chip);
+ return -EBUSY;
+ }
+ }
+ chip->dma16 = dma16;
+#endif
+
+ __skip_allocation:
+ chip->card = card;
+ chip->hardware = hardware;
+ if ((err = snd_sbdsp_probe(chip)) < 0) {
+ snd_sbdsp_free(chip);
+ return err;
+ }
+ if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+ snd_sbdsp_free(chip);
+ return err;
+ }
+ *r_chip = chip;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_sbdsp_command);
+EXPORT_SYMBOL(snd_sbdsp_get_byte);
+EXPORT_SYMBOL(snd_sbdsp_reset);
+EXPORT_SYMBOL(snd_sbdsp_create);
+/* sb_mixer.c */
+EXPORT_SYMBOL(snd_sbmixer_write);
+EXPORT_SYMBOL(snd_sbmixer_read);
+EXPORT_SYMBOL(snd_sbmixer_new);
+EXPORT_SYMBOL(snd_sbmixer_add_ctl);
+
+/*
+ * INIT part
+ */
+
+static int __init alsa_sb_common_init(void)
+{
+ return 0;
+}
+
+static void __exit alsa_sb_common_exit(void)
+{
+}
+
+module_init(alsa_sb_common_init)
+module_exit(alsa_sb_common_exit)
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-19 22:47:10 +0000