Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 236 insertions, 0 deletions

diff --git a/sound/isa/gus/gus_dma.c b/sound/isa/gus/gus_dma.c
new file mode 100644
index 0000000000..6d664dd8dd
--- /dev/null
+++ b/sound/isa/gus/gus_dma.c
@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Routines for GF1 DMA control
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <asm/dma.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/gus.h>
+
+static void snd_gf1_dma_ack(struct snd_gus_card * gus)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&gus->reg_lock, flags);
+	snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, 0x00);
+	snd_gf1_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL);
+	spin_unlock_irqrestore(&gus->reg_lock, flags);
+}
+
+static void snd_gf1_dma_program(struct snd_gus_card * gus,
+				unsigned int addr,
+				unsigned long buf_addr,
+				unsigned int count,
+				unsigned int cmd)
+{
+	unsigned long flags;
+	unsigned int address;
+	unsigned char dma_cmd;
+	unsigned int address_high;
+
+	snd_printdd("dma_transfer: addr=0x%x, buf=0x%lx, count=0x%x\n",
+		    addr, buf_addr, count);
+
+	if (gus->gf1.dma1 > 3) {
+		if (gus->gf1.enh_mode) {
+			address = addr >> 1;
+		} else {
+			if (addr & 0x1f) {
+				snd_printd("snd_gf1_dma_transfer: unaligned address (0x%x)?\n", addr);
+				return;
+			}
+			address = (addr & 0x000c0000) | ((addr & 0x0003ffff) >> 1);
+		}
+	} else {
+		address = addr;
+	}
+
+	dma_cmd = SNDRV_GF1_DMA_ENABLE | (unsigned short) cmd;
+#if 0
+	dma_cmd |= 0x08;
+#endif
+	if (dma_cmd & SNDRV_GF1_DMA_16BIT) {
+		count++;
+		count &= ~1;	/* align */
+	}
+	if (gus->gf1.dma1 > 3) {
+		dma_cmd |= SNDRV_GF1_DMA_WIDTH16;
+		count++;
+		count &= ~1;	/* align */
+	}
+	snd_gf1_dma_ack(gus);
+	snd_dma_program(gus->gf1.dma1, buf_addr, count, dma_cmd & SNDRV_GF1_DMA_READ ? DMA_MODE_READ : DMA_MODE_WRITE);
+#if 0
+	snd_printk(KERN_DEBUG "address = 0x%x, count = 0x%x, dma_cmd = 0x%x\n",
+		   address << 1, count, dma_cmd);
+#endif
+	spin_lock_irqsave(&gus->reg_lock, flags);
+	if (gus->gf1.enh_mode) {
+		address_high = ((address >> 16) & 0x000000f0) | (address & 0x0000000f);
+		snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));
+		snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_HIGH, (unsigned char) address_high);
+	} else
+		snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));
+	snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, dma_cmd);
+	spin_unlock_irqrestore(&gus->reg_lock, flags);
+}
+
+static struct snd_gf1_dma_block *snd_gf1_dma_next_block(struct snd_gus_card * gus)
+{
+	struct snd_gf1_dma_block *block;
+
+	/* PCM block have bigger priority than synthesizer one */
+	if (gus->gf1.dma_data_pcm) {
+		block = gus->gf1.dma_data_pcm;
+		if (gus->gf1.dma_data_pcm_last == block) {
+			gus->gf1.dma_data_pcm =
+			gus->gf1.dma_data_pcm_last = NULL;
+		} else {
+			gus->gf1.dma_data_pcm = block->next;
+		}
+	} else if (gus->gf1.dma_data_synth) {
+		block = gus->gf1.dma_data_synth;
+		if (gus->gf1.dma_data_synth_last == block) {
+			gus->gf1.dma_data_synth =
+			gus->gf1.dma_data_synth_last = NULL;
+		} else {
+			gus->gf1.dma_data_synth = block->next;
+		}
+	} else {
+		block = NULL;
+	}
+	if (block) {
+		gus->gf1.dma_ack = block->ack;
+		gus->gf1.dma_private_data = block->private_data;
+	}
+	return block;
+}
+
+
+static void snd_gf1_dma_interrupt(struct snd_gus_card * gus)
+{
+	struct snd_gf1_dma_block *block;
+
+	snd_gf1_dma_ack(gus);
+	if (gus->gf1.dma_ack)
+		gus->gf1.dma_ack(gus, gus->gf1.dma_private_data);
+	spin_lock(&gus->dma_lock);
+	if (gus->gf1.dma_data_pcm == NULL &&
+	    gus->gf1.dma_data_synth == NULL) {
+	    	gus->gf1.dma_ack = NULL;
+		gus->gf1.dma_flags &= ~SNDRV_GF1_DMA_TRIGGER;
+		spin_unlock(&gus->dma_lock);
+		return;
+	}
+	block = snd_gf1_dma_next_block(gus);
+	spin_unlock(&gus->dma_lock);
+	if (!block)
+		return;
+	snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);
+	kfree(block);
+#if 0
+	snd_printd(KERN_DEBUG "program dma (IRQ) - "
+		   "addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
+		   block->addr, block->buf_addr, block->count, block->cmd);
+#endif
+}
+
+int snd_gf1_dma_init(struct snd_gus_card * gus)
+{
+	mutex_lock(&gus->dma_mutex);
+	gus->gf1.dma_shared++;
+	if (gus->gf1.dma_shared > 1) {
+		mutex_unlock(&gus->dma_mutex);
+		return 0;
+	}
+	gus->gf1.interrupt_handler_dma_write = snd_gf1_dma_interrupt;
+	gus->gf1.dma_data_pcm = 
+	gus->gf1.dma_data_pcm_last =
+	gus->gf1.dma_data_synth = 
+	gus->gf1.dma_data_synth_last = NULL;
+	mutex_unlock(&gus->dma_mutex);
+	return 0;
+}
+
+int snd_gf1_dma_done(struct snd_gus_card * gus)
+{
+	struct snd_gf1_dma_block *block;
+
+	mutex_lock(&gus->dma_mutex);
+	gus->gf1.dma_shared--;
+	if (!gus->gf1.dma_shared) {
+		snd_dma_disable(gus->gf1.dma1);
+		snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_WRITE);
+		snd_gf1_dma_ack(gus);
+		while ((block = gus->gf1.dma_data_pcm)) {
+			gus->gf1.dma_data_pcm = block->next;
+			kfree(block);
+		}
+		while ((block = gus->gf1.dma_data_synth)) {
+			gus->gf1.dma_data_synth = block->next;
+			kfree(block);
+		}
+		gus->gf1.dma_data_pcm_last =
+		gus->gf1.dma_data_synth_last = NULL;
+	}
+	mutex_unlock(&gus->dma_mutex);
+	return 0;
+}
+
+int snd_gf1_dma_transfer_block(struct snd_gus_card * gus,
+			       struct snd_gf1_dma_block * __block,
+			       int atomic,
+			       int synth)
+{
+	unsigned long flags;
+	struct snd_gf1_dma_block *block;
+
+	block = kmalloc(sizeof(*block), atomic ? GFP_ATOMIC : GFP_KERNEL);
+	if (!block)
+		return -ENOMEM;
+
+	*block = *__block;
+	block->next = NULL;
+
+	snd_printdd("addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
+		    block->addr, (long) block->buffer, block->count,
+		    block->cmd);
+
+	snd_printdd("gus->gf1.dma_data_pcm_last = 0x%lx\n",
+		    (long)gus->gf1.dma_data_pcm_last);
+	snd_printdd("gus->gf1.dma_data_pcm = 0x%lx\n",
+		    (long)gus->gf1.dma_data_pcm);
+
+	spin_lock_irqsave(&gus->dma_lock, flags);
+	if (synth) {
+		if (gus->gf1.dma_data_synth_last) {
+			gus->gf1.dma_data_synth_last->next = block;
+			gus->gf1.dma_data_synth_last = block;
+		} else {
+			gus->gf1.dma_data_synth = 
+			gus->gf1.dma_data_synth_last = block;
+		}
+	} else {
+		if (gus->gf1.dma_data_pcm_last) {
+			gus->gf1.dma_data_pcm_last->next = block;
+			gus->gf1.dma_data_pcm_last = block;
+		} else {
+			gus->gf1.dma_data_pcm = 
+			gus->gf1.dma_data_pcm_last = block;
+		}
+	}
+	if (!(gus->gf1.dma_flags & SNDRV_GF1_DMA_TRIGGER)) {
+		gus->gf1.dma_flags |= SNDRV_GF1_DMA_TRIGGER;
+		block = snd_gf1_dma_next_block(gus);
+		spin_unlock_irqrestore(&gus->dma_lock, flags);
+		if (block == NULL)
+			return 0;
+		snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);
+		kfree(block);
+		return 0;
+	}
+	spin_unlock_irqrestore(&gus->dma_lock, flags);
+	return 0;
+}