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authorJames Courtier-Dutton <James@superbug.co.uk>2005-12-21 09:06:08 -0500
committerJaroslav Kysela <perex@suse.cz>2006-01-03 06:31:01 -0500
commit27fe864ec9e61041fc0b6f680207ae84f359b502 (patch)
tree19392d34e5f076e47192f8a9acf877ef50adc881 /sound/pci/emu10k1/io.c
parenta5875159dd6cec0ec743971343aee8dceac281d7 (diff)
[ALSA] snd-emu10k1: Removes some distortion from Audigy 2 ZS Notebook.
Modules: EMU10K1/EMU10K2 driver Description: Part way to fix ALSA bug#927 Add support for the SPI interface on the CA0108 chip. This is used to control the registers on the DAC. Headphone output tested. Other outputs and Capture not tested yet. Note: The red LED does not come on, but sound is still OK. Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
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 5d116dd7403b..7d0cb9db4280 100644
--- a/sound/pci/emu10k1/io.c
+++ b/sound/pci/emu10k1/io.c
@@ -29,6 +29,7 @@
29#include <linux/time.h> 29#include <linux/time.h>
30#include <sound/core.h> 30#include <sound/core.h>
31#include <sound/emu10k1.h> 31#include <sound/emu10k1.h>
32#include <linux/delay.h>
32 33
33unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, unsigned int chn) 34unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, unsigned int chn)
34{ 35{
@@ -123,6 +124,41 @@ void snd_emu10k1_ptr20_write(struct snd_emu10k1 *emu,
123 spin_unlock_irqrestore(&emu->emu_lock, flags); 124 spin_unlock_irqrestore(&emu->emu_lock, flags);
124} 125}
125 126
127int snd_emu10k1_spi_write(struct snd_emu10k1 * emu,
128 unsigned int data)
129{
130 unsigned int reset, set;
131 unsigned int reg, tmp;
132 int n, result;
133 if (emu->card_capabilities->ca0108_chip) {
134 reg=0x3c; /* PTR20, reg 0x3c */
135 } else {
136 return 1; /* For other cards types the SPI register is currently unknown. */
137 }
138 if (data > 0xffff) return 1; /* Only 16bit values allowed */
139
140 tmp = snd_emu10k1_ptr20_read(emu, reg, 0);
141 reset = (tmp & ~0x3ffff) | 0x20000; /* Set xxx20000 */
142 set = reset | 0x10000; /* Set xxx1xxxx */
143 snd_emu10k1_ptr20_write(emu, reg, 0, reset | data);
144 tmp = snd_emu10k1_ptr20_read(emu, reg, 0); /* write post */
145 snd_emu10k1_ptr20_write(emu, reg, 0, set | data);
146 result = 1;
147 /* Wait for status bit to return to 0 */
148 for (n=0;n<100;n++) {
149 udelay(10);
150 tmp = snd_emu10k1_ptr20_read(emu, reg, 0);
151 if (!(tmp & 0x10000)) {
152 result=0;
153 break;
154 }
155 }
156 if (result) return 1; /* Timed out */
157 snd_emu10k1_ptr20_write(emu, reg, 0, reset | data);
158 tmp = snd_emu10k1_ptr20_read(emu, reg, 0); /* Write post */
159 return 0;
160}
161
126void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb) 162void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb)
127{ 163{
128 unsigned long flags; 164 unsigned long flags;