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-rw-r--r--sound/oss/sb_audio.c1098
1 files changed, 1098 insertions, 0 deletions
diff --git a/sound/oss/sb_audio.c b/sound/oss/sb_audio.c
new file mode 100644
index 000000000000..75e54f6f638a
--- /dev/null
+++ b/sound/oss/sb_audio.c
@@ -0,0 +1,1098 @@
+/*
+ * sound/sb_audio.c
+ *
+ * Audio routines for Sound Blaster compatible cards.
+ *
+ *
+ * Copyright (C) by Hannu Savolainen 1993-1997
+ *
+ * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
+ * Version 2 (June 1991). See the "COPYING" file distributed with this software
+ * for more info.
+ *
+ * Changes
+ * Alan Cox : Formatting and clean ups
+ *
+ * Status
+ * Mostly working. Weird uart bug causing irq storms
+ *
+ * Daniel J. Rodriksson: Changes to make sb16 work full duplex.
+ * Maybe other 16 bit cards in this code could behave
+ * the same.
+ * Chris Rankin: Use spinlocks instead of CLI/STI
+ */
+
+#include <linux/spinlock.h>
+
+#include "sound_config.h"
+
+#include "sb_mixer.h"
+#include "sb.h"
+
+#include "sb_ess.h"
+
+int sb_audio_open(int dev, int mode)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long flags;
+
+ if (devc == NULL)
+ {
+ printk(KERN_ERR "Sound Blaster: incomplete initialization.\n");
+ return -ENXIO;
+ }
+ if (devc->caps & SB_NO_RECORDING && mode & OPEN_READ)
+ {
+ if (mode == OPEN_READ)
+ return -EPERM;
+ }
+ spin_lock_irqsave(&devc->lock, flags);
+ if (devc->opened)
+ {
+ spin_unlock_irqrestore(&devc->lock, flags);
+ return -EBUSY;
+ }
+ if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex)
+ {
+ if (sound_open_dma(devc->dma16, "Sound Blaster 16 bit"))
+ {
+ spin_unlock_irqrestore(&devc->lock, flags);
+ return -EBUSY;
+ }
+ }
+ devc->opened = mode;
+ spin_unlock_irqrestore(&devc->lock, flags);
+
+ devc->irq_mode = IMODE_NONE;
+ devc->irq_mode_16 = IMODE_NONE;
+ devc->fullduplex = devc->duplex &&
+ ((mode & OPEN_READ) && (mode & OPEN_WRITE));
+ sb_dsp_reset(devc);
+
+ /* At first glance this check isn't enough, some ESS chips might not
+ * have a RECLEV. However if they don't common_mixer_set will refuse
+ * cause devc->iomap has no register mapping for RECLEV
+ */
+ if (devc->model == MDL_ESS) ess_mixer_reload (devc, SOUND_MIXER_RECLEV);
+
+ /* The ALS007 seems to require that the DSP be removed from the output */
+ /* in order for recording to be activated properly. This is done by */
+ /* setting the appropriate bits of the output control register 4ch to */
+ /* zero. This code assumes that the output control registers are not */
+ /* used anywhere else and therefore the DSP bits are *always* ON for */
+ /* output and OFF for sampling. */
+
+ if (devc->submodel == SUBMDL_ALS007)
+ {
+ if (mode & OPEN_READ)
+ sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
+ sb_getmixer(devc,ALS007_OUTPUT_CTRL2) & 0xf9);
+ else
+ sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
+ sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
+ }
+ return 0;
+}
+
+void sb_audio_close(int dev)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ /* fix things if mmap turned off fullduplex */
+ if(devc->duplex
+ && !devc->fullduplex
+ && (devc->opened & OPEN_READ) && (devc->opened & OPEN_WRITE))
+ {
+ struct dma_buffparms *dmap_temp;
+ dmap_temp = audio_devs[dev]->dmap_out;
+ audio_devs[dev]->dmap_out = audio_devs[dev]->dmap_in;
+ audio_devs[dev]->dmap_in = dmap_temp;
+ }
+ audio_devs[dev]->dmap_out->dma = devc->dma8;
+ audio_devs[dev]->dmap_in->dma = ( devc->duplex ) ?
+ devc->dma16 : devc->dma8;
+
+ if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex)
+ sound_close_dma(devc->dma16);
+
+ /* For ALS007, turn DSP output back on if closing the device for read */
+
+ if ((devc->submodel == SUBMDL_ALS007) && (devc->opened & OPEN_READ))
+ {
+ sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
+ sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
+ }
+ devc->opened = 0;
+}
+
+static void sb_set_output_parms(int dev, unsigned long buf, int nr_bytes,
+ int intrflag)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (!devc->fullduplex || devc->bits == AFMT_S16_LE)
+ {
+ devc->trg_buf = buf;
+ devc->trg_bytes = nr_bytes;
+ devc->trg_intrflag = intrflag;
+ devc->irq_mode = IMODE_OUTPUT;
+ }
+ else
+ {
+ devc->trg_buf_16 = buf;
+ devc->trg_bytes_16 = nr_bytes;
+ devc->trg_intrflag_16 = intrflag;
+ devc->irq_mode_16 = IMODE_OUTPUT;
+ }
+}
+
+static void sb_set_input_parms(int dev, unsigned long buf, int count, int intrflag)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (!devc->fullduplex || devc->bits != AFMT_S16_LE)
+ {
+ devc->trg_buf = buf;
+ devc->trg_bytes = count;
+ devc->trg_intrflag = intrflag;
+ devc->irq_mode = IMODE_INPUT;
+ }
+ else
+ {
+ devc->trg_buf_16 = buf;
+ devc->trg_bytes_16 = count;
+ devc->trg_intrflag_16 = intrflag;
+ devc->irq_mode_16 = IMODE_INPUT;
+ }
+}
+
+/*
+ * SB1.x compatible routines
+ */
+
+static void sb1_audio_output_block(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+ unsigned long flags;
+ int count = nr_bytes;
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
+
+ if (audio_devs[dev]->dmap_out->dma > 3)
+ count >>= 1;
+ count--;
+
+ devc->irq_mode = IMODE_OUTPUT;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x14)) /* 8 bit DAC using DMA */
+ {
+ sb_dsp_command(devc, (unsigned char) (count & 0xff));
+ sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
+ }
+ else
+ printk(KERN_WARNING "Sound Blaster: unable to start DAC.\n");
+ spin_unlock_irqrestore(&devc->lock, flags);
+ devc->intr_active = 1;
+}
+
+static void sb1_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+ unsigned long flags;
+ int count = nr_bytes;
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ /*
+ * Start a DMA input to the buffer pointed by dmaqtail
+ */
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
+
+ if (audio_devs[dev]->dmap_out->dma > 3)
+ count >>= 1;
+ count--;
+
+ devc->irq_mode = IMODE_INPUT;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x24)) /* 8 bit ADC using DMA */
+ {
+ sb_dsp_command(devc, (unsigned char) (count & 0xff));
+ sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
+ }
+ else
+ printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
+ spin_unlock_irqrestore(&devc->lock, flags);
+
+ devc->intr_active = 1;
+}
+
+static void sb1_audio_trigger(int dev, int bits)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ bits &= devc->irq_mode;
+
+ if (!bits)
+ sb_dsp_command(devc, 0xd0); /* Halt DMA */
+ else
+ {
+ switch (devc->irq_mode)
+ {
+ case IMODE_INPUT:
+ sb1_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+
+ case IMODE_OUTPUT:
+ sb1_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+ }
+ }
+ devc->trigger_bits = bits;
+}
+
+static int sb1_audio_prepare_for_input(int dev, int bsize, int bcount)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x40))
+ sb_dsp_command(devc, devc->tconst);
+ sb_dsp_command(devc, DSP_CMD_SPKOFF);
+ spin_unlock_irqrestore(&devc->lock, flags);
+
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static int sb1_audio_prepare_for_output(int dev, int bsize, int bcount)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x40))
+ sb_dsp_command(devc, devc->tconst);
+ sb_dsp_command(devc, DSP_CMD_SPKON);
+ spin_unlock_irqrestore(&devc->lock, flags);
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static int sb1_audio_set_speed(int dev, int speed)
+{
+ int max_speed = 23000;
+ sb_devc *devc = audio_devs[dev]->devc;
+ int tmp;
+
+ if (devc->opened & OPEN_READ)
+ max_speed = 13000;
+
+ if (speed > 0)
+ {
+ if (speed < 4000)
+ speed = 4000;
+
+ if (speed > max_speed)
+ speed = max_speed;
+
+ devc->tconst = (256 - ((1000000 + speed / 2) / speed)) & 0xff;
+ tmp = 256 - devc->tconst;
+ speed = (1000000 + tmp / 2) / tmp;
+
+ devc->speed = speed;
+ }
+ return devc->speed;
+}
+
+static short sb1_audio_set_channels(int dev, short channels)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ return devc->channels = 1;
+}
+
+static unsigned int sb1_audio_set_bits(int dev, unsigned int bits)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ return devc->bits = 8;
+}
+
+static void sb1_audio_halt_xfer(int dev)
+{
+ unsigned long flags;
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ sb_dsp_reset(devc);
+ spin_unlock_irqrestore(&devc->lock, flags);
+}
+
+/*
+ * SB 2.0 and SB 2.01 compatible routines
+ */
+
+static void sb20_audio_output_block(int dev, unsigned long buf, int nr_bytes,
+ int intrflag)
+{
+ unsigned long flags;
+ int count = nr_bytes;
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned char cmd;
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
+
+ if (audio_devs[dev]->dmap_out->dma > 3)
+ count >>= 1;
+ count--;
+
+ devc->irq_mode = IMODE_OUTPUT;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
+ {
+ sb_dsp_command(devc, (unsigned char) (count & 0xff));
+ sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
+
+ if (devc->speed * devc->channels <= 23000)
+ cmd = 0x1c; /* 8 bit PCM output */
+ else
+ cmd = 0x90; /* 8 bit high speed PCM output (SB2.01/Pro) */
+
+ if (!sb_dsp_command(devc, cmd))
+ printk(KERN_ERR "Sound Blaster: unable to start DAC.\n");
+ }
+ else
+ printk(KERN_ERR "Sound Blaster: unable to start DAC.\n");
+ spin_unlock_irqrestore(&devc->lock, flags);
+ devc->intr_active = 1;
+}
+
+static void sb20_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+ unsigned long flags;
+ int count = nr_bytes;
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned char cmd;
+
+ /*
+ * Start a DMA input to the buffer pointed by dmaqtail
+ */
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
+
+ if (audio_devs[dev]->dmap_out->dma > 3)
+ count >>= 1;
+ count--;
+
+ devc->irq_mode = IMODE_INPUT;
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
+ {
+ sb_dsp_command(devc, (unsigned char) (count & 0xff));
+ sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
+
+ if (devc->speed * devc->channels <= (devc->major == 3 ? 23000 : 13000))
+ cmd = 0x2c; /* 8 bit PCM input */
+ else
+ cmd = 0x98; /* 8 bit high speed PCM input (SB2.01/Pro) */
+
+ if (!sb_dsp_command(devc, cmd))
+ printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
+ }
+ else
+ printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
+ spin_unlock_irqrestore(&devc->lock, flags);
+ devc->intr_active = 1;
+}
+
+static void sb20_audio_trigger(int dev, int bits)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ bits &= devc->irq_mode;
+
+ if (!bits)
+ sb_dsp_command(devc, 0xd0); /* Halt DMA */
+ else
+ {
+ switch (devc->irq_mode)
+ {
+ case IMODE_INPUT:
+ sb20_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+
+ case IMODE_OUTPUT:
+ sb20_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+ }
+ }
+ devc->trigger_bits = bits;
+}
+
+/*
+ * SB2.01 specific speed setup
+ */
+
+static int sb201_audio_set_speed(int dev, int speed)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ int tmp;
+ int s = speed * devc->channels;
+
+ if (speed > 0)
+ {
+ if (speed < 4000)
+ speed = 4000;
+ if (speed > 44100)
+ speed = 44100;
+ if (devc->opened & OPEN_READ && speed > 15000)
+ speed = 15000;
+ devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
+ tmp = 256 - devc->tconst;
+ speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
+
+ devc->speed = speed;
+ }
+ return devc->speed;
+}
+
+/*
+ * SB Pro specific routines
+ */
+
+static int sbpro_audio_prepare_for_input(int dev, int bsize, int bcount)
+{ /* For SB Pro and Jazz16 */
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long flags;
+ unsigned char bits = 0;
+
+ if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
+ audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma =
+ devc->bits == 16 ? devc->dma16 : devc->dma8;
+
+ if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
+ if (devc->bits == AFMT_S16_LE)
+ bits = 0x04; /* 16 bit mode */
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x40))
+ sb_dsp_command(devc, devc->tconst);
+ sb_dsp_command(devc, DSP_CMD_SPKOFF);
+ if (devc->channels == 1)
+ sb_dsp_command(devc, 0xa0 | bits); /* Mono input */
+ else
+ sb_dsp_command(devc, 0xa8 | bits); /* Stereo input */
+ spin_unlock_irqrestore(&devc->lock, flags);
+
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static int sbpro_audio_prepare_for_output(int dev, int bsize, int bcount)
+{ /* For SB Pro and Jazz16 */
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long flags;
+ unsigned char tmp;
+ unsigned char bits = 0;
+
+ if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
+ audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma = devc->bits == 16 ? devc->dma16 : devc->dma8;
+ if (devc->model == MDL_SBPRO)
+ sb_mixer_set_stereo(devc, devc->channels == 2);
+
+ spin_lock_irqsave(&devc->lock, flags);
+ if (sb_dsp_command(devc, 0x40))
+ sb_dsp_command(devc, devc->tconst);
+ sb_dsp_command(devc, DSP_CMD_SPKON);
+
+ if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
+ {
+ if (devc->bits == AFMT_S16_LE)
+ bits = 0x04; /* 16 bit mode */
+
+ if (devc->channels == 1)
+ sb_dsp_command(devc, 0xa0 | bits); /* Mono output */
+ else
+ sb_dsp_command(devc, 0xa8 | bits); /* Stereo output */
+ spin_unlock_irqrestore(&devc->lock, flags);
+ }
+ else
+ {
+ spin_unlock_irqrestore(&devc->lock, flags);
+ tmp = sb_getmixer(devc, 0x0e);
+ if (devc->channels == 1)
+ tmp &= ~0x02;
+ else
+ tmp |= 0x02;
+ sb_setmixer(devc, 0x0e, tmp);
+ }
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static int sbpro_audio_set_speed(int dev, int speed)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (speed > 0)
+ {
+ if (speed < 4000)
+ speed = 4000;
+ if (speed > 44100)
+ speed = 44100;
+ if (devc->channels > 1 && speed > 22050)
+ speed = 22050;
+ sb201_audio_set_speed(dev, speed);
+ }
+ return devc->speed;
+}
+
+static short sbpro_audio_set_channels(int dev, short channels)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (channels == 1 || channels == 2)
+ {
+ if (channels != devc->channels)
+ {
+ devc->channels = channels;
+ if (devc->model == MDL_SBPRO && devc->channels == 2)
+ sbpro_audio_set_speed(dev, devc->speed);
+ }
+ }
+ return devc->channels;
+}
+
+static int jazz16_audio_set_speed(int dev, int speed)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (speed > 0)
+ {
+ int tmp;
+ int s = speed * devc->channels;
+
+ if (speed < 5000)
+ speed = 5000;
+ if (speed > 44100)
+ speed = 44100;
+
+ devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
+
+ tmp = 256 - devc->tconst;
+ speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
+
+ devc->speed = speed;
+ }
+ return devc->speed;
+}
+
+/*
+ * SB16 specific routines
+ */
+
+static int sb16_audio_set_speed(int dev, int speed)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ int max_speed = devc->submodel == SUBMDL_ALS100 ? 48000 : 44100;
+
+ if (speed > 0)
+ {
+ if (speed < 5000)
+ speed = 5000;
+
+ if (speed > max_speed)
+ speed = max_speed;
+
+ devc->speed = speed;
+ }
+ return devc->speed;
+}
+
+static unsigned int sb16_audio_set_bits(int dev, unsigned int bits)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (bits != 0)
+ {
+ if (bits == AFMT_U8 || bits == AFMT_S16_LE)
+ devc->bits = bits;
+ else
+ devc->bits = AFMT_U8;
+ }
+
+ return devc->bits;
+}
+
+static int sb16_audio_prepare_for_input(int dev, int bsize, int bcount)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (!devc->fullduplex)
+ {
+ audio_devs[dev]->dmap_out->dma =
+ audio_devs[dev]->dmap_in->dma =
+ devc->bits == AFMT_S16_LE ?
+ devc->dma16 : devc->dma8;
+ }
+ else if (devc->bits == AFMT_S16_LE)
+ {
+ audio_devs[dev]->dmap_out->dma = devc->dma8;
+ audio_devs[dev]->dmap_in->dma = devc->dma16;
+ }
+ else
+ {
+ audio_devs[dev]->dmap_out->dma = devc->dma16;
+ audio_devs[dev]->dmap_in->dma = devc->dma8;
+ }
+
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static int sb16_audio_prepare_for_output(int dev, int bsize, int bcount)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (!devc->fullduplex)
+ {
+ audio_devs[dev]->dmap_out->dma =
+ audio_devs[dev]->dmap_in->dma =
+ devc->bits == AFMT_S16_LE ?
+ devc->dma16 : devc->dma8;
+ }
+ else if (devc->bits == AFMT_S16_LE)
+ {
+ audio_devs[dev]->dmap_out->dma = devc->dma8;
+ audio_devs[dev]->dmap_in->dma = devc->dma16;
+ }
+ else
+ {
+ audio_devs[dev]->dmap_out->dma = devc->dma16;
+ audio_devs[dev]->dmap_in->dma = devc->dma8;
+ }
+
+ devc->trigger_bits = 0;
+ return 0;
+}
+
+static void sb16_audio_output_block(int dev, unsigned long buf, int count,
+ int intrflag)
+{
+ unsigned long flags, cnt;
+ sb_devc *devc = audio_devs[dev]->devc;
+ unsigned long bits;
+
+ if (!devc->fullduplex || devc->bits == AFMT_S16_LE)
+ {
+ devc->irq_mode = IMODE_OUTPUT;
+ devc->intr_active = 1;
+ }
+ else
+ {
+ devc->irq_mode_16 = IMODE_OUTPUT;
+ devc->intr_active_16 = 1;
+ }
+
+ /* save value */
+ spin_lock_irqsave(&devc->lock, flags);
+ bits = devc->bits;
+ if (devc->fullduplex)
+ devc->bits = (devc->bits == AFMT_S16_LE) ?
+ AFMT_U8 : AFMT_S16_LE;
+ spin_unlock_irqrestore(&devc->lock, flags);
+
+ cnt = count;
+ if (devc->bits == AFMT_S16_LE)
+ cnt >>= 1;
+ cnt--;
+
+ spin_lock_irqsave(&devc->lock, flags);
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
+
+ sb_dsp_command(devc, 0x41);
+ sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
+ sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
+
+ sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xb6 : 0xc6));
+ sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
+ (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
+ sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
+ sb_dsp_command(devc, (unsigned char) (cnt >> 8));
+
+ /* restore real value after all programming */
+ devc->bits = bits;
+ spin_unlock_irqrestore(&devc->lock, flags);
+}
+
+
+/*
+ * This fails on the Cyrix MediaGX. If you don't have the DMA enabled
+ * before the first sample arrives it locks up. However even if you
+ * do enable the DMA in time you just get DMA timeouts and missing
+ * interrupts and stuff, so for now I've not bothered fixing this either.
+ */
+
+static void sb16_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
+{
+ unsigned long flags, cnt;
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ if (!devc->fullduplex || devc->bits != AFMT_S16_LE)
+ {
+ devc->irq_mode = IMODE_INPUT;
+ devc->intr_active = 1;
+ }
+ else
+ {
+ devc->irq_mode_16 = IMODE_INPUT;
+ devc->intr_active_16 = 1;
+ }
+
+ cnt = count;
+ if (devc->bits == AFMT_S16_LE)
+ cnt >>= 1;
+ cnt--;
+
+ spin_lock_irqsave(&devc->lock, flags);
+
+ /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
+
+ sb_dsp_command(devc, 0x42);
+ sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
+ sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
+
+ sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xbe : 0xce));
+ sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
+ (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
+ sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
+ sb_dsp_command(devc, (unsigned char) (cnt >> 8));
+
+ spin_unlock_irqrestore(&devc->lock, flags);
+}
+
+static void sb16_audio_trigger(int dev, int bits)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+
+ int bits_16 = bits & devc->irq_mode_16;
+ bits &= devc->irq_mode;
+
+ if (!bits && !bits_16)
+ sb_dsp_command(devc, 0xd0); /* Halt DMA */
+ else
+ {
+ if (bits)
+ {
+ switch (devc->irq_mode)
+ {
+ case IMODE_INPUT:
+ sb16_audio_start_input(dev,
+ devc->trg_buf,
+ devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+
+ case IMODE_OUTPUT:
+ sb16_audio_output_block(dev,
+ devc->trg_buf,
+ devc->trg_bytes,
+ devc->trg_intrflag);
+ break;
+ }
+ }
+ if (bits_16)
+ {
+ switch (devc->irq_mode_16)
+ {
+ case IMODE_INPUT:
+ sb16_audio_start_input(dev,
+ devc->trg_buf_16,
+ devc->trg_bytes_16,
+ devc->trg_intrflag_16);
+ break;
+
+ case IMODE_OUTPUT:
+ sb16_audio_output_block(dev,
+ devc->trg_buf_16,
+ devc->trg_bytes_16,
+ devc->trg_intrflag_16);
+ break;
+ }
+ }
+ }
+
+ devc->trigger_bits = bits | bits_16;
+}
+
+static unsigned char lbuf8[2048];
+static signed short *lbuf16 = (signed short *)lbuf8;
+#define LBUFCOPYSIZE 1024
+static void
+sb16_copy_from_user(int dev,
+ char *localbuf, int localoffs,
+ const char __user *userbuf, int useroffs,
+ int max_in, int max_out,
+ int *used, int *returned,
+ int len)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ int i, c, p, locallen;
+ unsigned char *buf8;
+ signed short *buf16;
+
+ /* if not duplex no conversion */
+ if (!devc->fullduplex)
+ {
+ if (copy_from_user(localbuf + localoffs,
+ userbuf + useroffs, len))
+ return;
+ *used = len;
+ *returned = len;
+ }
+ else if (devc->bits == AFMT_S16_LE)
+ {
+ /* 16 -> 8 */
+ /* max_in >> 1, max number of samples in ( 16 bits ) */
+ /* max_out, max number of samples out ( 8 bits ) */
+ /* len, number of samples that will be taken ( 16 bits )*/
+ /* c, count of samples remaining in buffer ( 16 bits )*/
+ /* p, count of samples already processed ( 16 bits )*/
+ len = ( (max_in >> 1) > max_out) ? max_out : (max_in >> 1);
+ c = len;
+ p = 0;
+ buf8 = (unsigned char *)(localbuf + localoffs);
+ while (c)
+ {
+ locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
+ /* << 1 in order to get 16 bit samples */
+ if (copy_from_user(lbuf16,
+ userbuf + useroffs + (p << 1),
+ locallen << 1))
+ return;
+ for (i = 0; i < locallen; i++)
+ {
+ buf8[p+i] = ~((lbuf16[i] >> 8) & 0xff) ^ 0x80;
+ }
+ c -= locallen; p += locallen;
+ }
+ /* used = ( samples * 16 bits size ) */
+ *used = max_in > ( max_out << 1) ? (max_out << 1) : max_in;
+ /* returned = ( samples * 8 bits size ) */
+ *returned = len;
+ }
+ else
+ {
+ /* 8 -> 16 */
+ /* max_in, max number of samples in ( 8 bits ) */
+ /* max_out >> 1, max number of samples out ( 16 bits ) */
+ /* len, number of samples that will be taken ( 8 bits )*/
+ /* c, count of samples remaining in buffer ( 8 bits )*/
+ /* p, count of samples already processed ( 8 bits )*/
+ len = max_in > (max_out >> 1) ? (max_out >> 1) : max_in;
+ c = len;
+ p = 0;
+ buf16 = (signed short *)(localbuf + localoffs);
+ while (c)
+ {
+ locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
+ if (copy_from_user(lbuf8,
+ userbuf+useroffs + p,
+ locallen))
+ return;
+ for (i = 0; i < locallen; i++)
+ {
+ buf16[p+i] = (~lbuf8[i] ^ 0x80) << 8;
+ }
+ c -= locallen; p += locallen;
+ }
+ /* used = ( samples * 8 bits size ) */
+ *used = len;
+ /* returned = ( samples * 16 bits size ) */
+ *returned = len << 1;
+ }
+}
+
+static void
+sb16_audio_mmap(int dev)
+{
+ sb_devc *devc = audio_devs[dev]->devc;
+ devc->fullduplex = 0;
+}
+
+static struct audio_driver sb1_audio_driver = /* SB1.x */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sb1_audio_prepare_for_input,
+ .prepare_for_output = sb1_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .trigger = sb1_audio_trigger,
+ .set_speed = sb1_audio_set_speed,
+ .set_bits = sb1_audio_set_bits,
+ .set_channels = sb1_audio_set_channels
+};
+
+static struct audio_driver sb20_audio_driver = /* SB2.0 */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sb1_audio_prepare_for_input,
+ .prepare_for_output = sb1_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .trigger = sb20_audio_trigger,
+ .set_speed = sb1_audio_set_speed,
+ .set_bits = sb1_audio_set_bits,
+ .set_channels = sb1_audio_set_channels
+};
+
+static struct audio_driver sb201_audio_driver = /* SB2.01 */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sb1_audio_prepare_for_input,
+ .prepare_for_output = sb1_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .trigger = sb20_audio_trigger,
+ .set_speed = sb201_audio_set_speed,
+ .set_bits = sb1_audio_set_bits,
+ .set_channels = sb1_audio_set_channels
+};
+
+static struct audio_driver sbpro_audio_driver = /* SB Pro */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sbpro_audio_prepare_for_input,
+ .prepare_for_output = sbpro_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .trigger = sb20_audio_trigger,
+ .set_speed = sbpro_audio_set_speed,
+ .set_bits = sb1_audio_set_bits,
+ .set_channels = sbpro_audio_set_channels
+};
+
+static struct audio_driver jazz16_audio_driver = /* Jazz16 and SM Wave */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sbpro_audio_prepare_for_input,
+ .prepare_for_output = sbpro_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .trigger = sb20_audio_trigger,
+ .set_speed = jazz16_audio_set_speed,
+ .set_bits = sb16_audio_set_bits,
+ .set_channels = sbpro_audio_set_channels
+};
+
+static struct audio_driver sb16_audio_driver = /* SB16 */
+{
+ .owner = THIS_MODULE,
+ .open = sb_audio_open,
+ .close = sb_audio_close,
+ .output_block = sb_set_output_parms,
+ .start_input = sb_set_input_parms,
+ .prepare_for_input = sb16_audio_prepare_for_input,
+ .prepare_for_output = sb16_audio_prepare_for_output,
+ .halt_io = sb1_audio_halt_xfer,
+ .copy_user = sb16_copy_from_user,
+ .trigger = sb16_audio_trigger,
+ .set_speed = sb16_audio_set_speed,
+ .set_bits = sb16_audio_set_bits,
+ .set_channels = sbpro_audio_set_channels,
+ .mmap = sb16_audio_mmap
+};
+
+void sb_audio_init(sb_devc * devc, char *name, struct module *owner)
+{
+ int audio_flags = 0;
+ int format_mask = AFMT_U8;
+
+ struct audio_driver *driver = &sb1_audio_driver;
+
+ switch (devc->model)
+ {
+ case MDL_SB1: /* SB1.0 or SB 1.5 */
+ DDB(printk("Will use standard SB1.x driver\n"));
+ audio_flags = DMA_HARDSTOP;
+ break;
+
+ case MDL_SB2:
+ DDB(printk("Will use SB2.0 driver\n"));
+ audio_flags = DMA_AUTOMODE;
+ driver = &sb20_audio_driver;
+ break;
+
+ case MDL_SB201:
+ DDB(printk("Will use SB2.01 (high speed) driver\n"));
+ audio_flags = DMA_AUTOMODE;
+ driver = &sb201_audio_driver;
+ break;
+
+ case MDL_JAZZ:
+ case MDL_SMW:
+ DDB(printk("Will use Jazz16 driver\n"));
+ audio_flags = DMA_AUTOMODE;
+ format_mask |= AFMT_S16_LE;
+ driver = &jazz16_audio_driver;
+ break;
+
+ case MDL_ESS:
+ DDB(printk("Will use ESS ES688/1688 driver\n"));
+ driver = ess_audio_init (devc, &audio_flags, &format_mask);
+ break;
+
+ case MDL_SB16:
+ DDB(printk("Will use SB16 driver\n"));
+ audio_flags = DMA_AUTOMODE;
+ format_mask |= AFMT_S16_LE;
+ if (devc->dma8 != devc->dma16 && devc->dma16 != -1)
+ {
+ audio_flags |= DMA_DUPLEX;
+ devc->duplex = 1;
+ }
+ driver = &sb16_audio_driver;
+ break;
+
+ default:
+ DDB(printk("Will use SB Pro driver\n"));
+ audio_flags = DMA_AUTOMODE;
+ driver = &sbpro_audio_driver;
+ }
+
+ if (owner)
+ driver->owner = owner;
+
+ if ((devc->dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
+ name,driver, sizeof(struct audio_driver),
+ audio_flags, format_mask, devc,
+ devc->dma8,
+ devc->duplex ? devc->dma16 : devc->dma8)) < 0)
+ {
+ printk(KERN_ERR "Sound Blaster: unable to install audio.\n");
+ return;
+ }
+ audio_devs[devc->dev]->mixer_dev = devc->my_mixerdev;
+ audio_devs[devc->dev]->min_fragment = 5;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-26 05:28:25 +0000