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Diffstat (limited to 'sound/pci/emu10k1/io.c')
-rw-r--r--sound/pci/emu10k1/io.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c
index 5d116dd..7d0cb9d 100644
--- a/sound/pci/emu10k1/io.c
+++ b/sound/pci/emu10k1/io.c
@@ -29,6 +29,7 @@
#include <linux/time.h>
#include <sound/core.h>
#include <sound/emu10k1.h>
+#include <linux/delay.h>
unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, unsigned int chn)
{
@@ -123,6 +124,41 @@ void snd_emu10k1_ptr20_write(struct snd_emu10k1 *emu,
spin_unlock_irqrestore(&emu->emu_lock, flags);
}
+int snd_emu10k1_spi_write(struct snd_emu10k1 * emu,
+ unsigned int data)
+{
+ unsigned int reset, set;
+ unsigned int reg, tmp;
+ int n, result;
+ if (emu->card_capabilities->ca0108_chip) {
+ reg=0x3c; /* PTR20, reg 0x3c */
+ } else {
+ return 1; /* For other cards types the SPI register is currently unknown. */
+ }
+ if (data > 0xffff) return 1; /* Only 16bit values allowed */
+
+ tmp = snd_emu10k1_ptr20_read(emu, reg, 0);
+ reset = (tmp & ~0x3ffff) | 0x20000; /* Set xxx20000 */
+ set = reset | 0x10000; /* Set xxx1xxxx */
+ snd_emu10k1_ptr20_write(emu, reg, 0, reset | data);
+ tmp = snd_emu10k1_ptr20_read(emu, reg, 0); /* write post */
+ snd_emu10k1_ptr20_write(emu, reg, 0, set | data);
+ result = 1;
+ /* Wait for status bit to return to 0 */
+ for (n=0;n<100;n++) {
+ udelay(10);
+ tmp = snd_emu10k1_ptr20_read(emu, reg, 0);
+ if (!(tmp & 0x10000)) {
+ result=0;
+ break;
+ }
+ }
+ if (result) return 1; /* Timed out */
+ snd_emu10k1_ptr20_write(emu, reg, 0, reset | data);
+ tmp = snd_emu10k1_ptr20_read(emu, reg, 0); /* Write post */
+ return 0;
+}
+
void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb)
{
unsigned long flags;
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