patch-2.1.94 linux/drivers/sound/vidc.c

• Lines: 84
• Date: Wed Apr 8 17:24:48 1998
• Orig file: v2.1.93/linux/drivers/sound/vidc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.93/linux/drivers/sound/vidc.c linux/drivers/sound/vidc.c
@@ -0,0 +1,83 @@
+/*
+ *	drivers/sound/vidc.c
+ *
+ *	Detection routine for the VIDC.
+ *
+ *	Copyright (C) 1997 by Russell King <rmk@arm.uk.linux.org>
+ */
+
+#include <linux/config.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include "sound_config.h"
+
+#include "vidc.h"
+
+int vidc_busy;
+
+void vidc_update_filler(int bits, int channels)
+{
+	int filltype;
+
+	filltype = bits + channels;
+	switch (filltype)
+	{
+		default:
+		case 9:
+			vidc_filler = vidc_fill_1x8;
+			break;
+		case 10:
+			vidc_filler = vidc_fill_2x8;
+			break;
+		case 17:
+			vidc_filler = vidc_fill_1x16;
+			break;
+		case 18:
+			vidc_filler = vidc_fill_2x16;
+			break;
+	}
+}
+
+void attach_vidc(struct address_info *hw_config)
+{
+	char name[32];
+	int i;
+
+	sprintf(name, "VIDC %d-bit sound", hw_config->card_subtype);
+	conf_printf(name, hw_config);
+
+	for (i = 0; i < 2; i++)
+	{
+		dma_buf[i] = get_free_page(GFP_KERNEL);
+		dma_pbuf[i] = virt_to_phys(dma_buf[i]);
+	}
+
+	if (sound_alloc_dma(hw_config->dma, "VIDCsound"))
+	{
+		printk(KERN_ERR "VIDCsound: can't allocate virtual DMA channel\n");
+		return;
+	}
+	if (request_irq(hw_config->irq, vidc_sound_dma_irq, 0, "VIDCsound", NULL))
+	{
+		printk(KERN_ERR "VIDCsound: can't allocate DMA interrupt\n");
+		return;
+	}
+	vidc_synth_init(hw_config);
+	vidc_audio_init(hw_config);
+	vidc_mixer_init(hw_config);
+}
+
+int probe_vidc(struct address_info *hw_config)
+{
+	hw_config->irq = IRQ_DMAS0;
+	hw_config->dma = DMA_VIRTUAL_SOUND;
+	hw_config->dma2 = -1;
+	hw_config->card_subtype = 16;
+	return 1;
+}
+
+void unload_vidc(struct address_info *hw_config)
+{
+	free_irq(hw_config->irq, NULL);
+	sound_free_dma(hw_config->dma);
+}