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authorDave Airlie <airlied@redhat.com>2009-03-28 20:22:18 -0400
committerDave Airlie <airlied@redhat.com>2009-03-28 20:22:18 -0400
commit90f959bcb386da2c71613dcefc6a285e054a539e (patch)
treeee3e9dd4111d4aad12e579cb0c2c159114dff263 /sound/pci/oxygen/oxygen_io.c
parent41f13fe81dd1b08723ab9f3fc3c7f29cfa81f1a5 (diff)
parent07d43ba98621f08e252a48c96b258b4d572b0257 (diff)
drm: merge Linux master into HEAD
Conflicts: drivers/gpu/drm/drm_info.c drivers/gpu/drm/drm_proc.c drivers/gpu/drm/i915/i915_gem_debugfs.c
Diffstat (limited to 'sound/pci/oxygen/oxygen_io.c')
-rw-r--r--sound/pci/oxygen/oxygen_io.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c
index 3126c4b403dd..c1eb923f2ac9 100644
--- a/sound/pci/oxygen/oxygen_io.c
+++ b/sound/pci/oxygen/oxygen_io.c
@@ -254,3 +254,34 @@ void oxygen_write_uart(struct oxygen *chip, u8 data)
_write_uart(chip, 0, data);
}
EXPORT_SYMBOL(oxygen_write_uart);
+
+u16 oxygen_read_eeprom(struct oxygen *chip, unsigned int index)
+{
+ unsigned int timeout;
+
+ oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,
+ index | OXYGEN_EEPROM_DIR_READ);
+ for (timeout = 0; timeout < 100; ++timeout) {
+ udelay(1);
+ if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)
+ & OXYGEN_EEPROM_BUSY))
+ break;
+ }
+ return oxygen_read16(chip, OXYGEN_EEPROM_DATA);
+}
+
+void oxygen_write_eeprom(struct oxygen *chip, unsigned int index, u16 value)
+{
+ unsigned int timeout;
+
+ oxygen_write16(chip, OXYGEN_EEPROM_DATA, value);
+ oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,
+ index | OXYGEN_EEPROM_DIR_WRITE);
+ for (timeout = 0; timeout < 10; ++timeout) {
+ msleep(1);
+ if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)
+ & OXYGEN_EEPROM_BUSY))
+ return;
+ }
+ snd_printk(KERN_ERR "EEPROM write timeout\n");
+}