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authorYinghai Lu <yinghailu@gmail.com>2004-12-03 03:39:04 +0000
committerYinghai Lu <yinghailu@gmail.com>2004-12-03 03:39:04 +0000
commit7213d0f513c2a0dbcacbf0a811d01322cd82d25b (patch)
treef40eb3d7e577af50edbc10f0df921fd34de9e075 /src/drivers/i2c/i2cmux
parent57b6786168683e33c1c6c2d8df6a1e8c0246fbde (diff)
downloadcoreboot-7213d0f513c2a0dbcacbf0a811d01322cd82d25b.tar.xz
i2c mux support
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1809 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/drivers/i2c/i2cmux')
-rw-r--r--src/drivers/i2c/i2cmux/Config.lb2
-rw-r--r--src/drivers/i2c/i2cmux/chip.h4
-rw-r--r--src/drivers/i2c/i2cmux/i2cmux.c44
3 files changed, 50 insertions, 0 deletions
diff --git a/src/drivers/i2c/i2cmux/Config.lb b/src/drivers/i2c/i2cmux/Config.lb
new file mode 100644
index 0000000000..6bce919d5d
--- /dev/null
+++ b/src/drivers/i2c/i2cmux/Config.lb
@@ -0,0 +1,2 @@
+config chip.h
+object i2cmux.o
diff --git a/src/drivers/i2c/i2cmux/chip.h b/src/drivers/i2c/i2cmux/chip.h
new file mode 100644
index 0000000000..ffaf87954a
--- /dev/null
+++ b/src/drivers/i2c/i2cmux/chip.h
@@ -0,0 +1,4 @@
+extern struct chip_operations drivers_i2c_i2cmux_ops;
+
+struct drivers_i2c_i2cmux_config {
+};
diff --git a/src/drivers/i2c/i2cmux/i2cmux.c b/src/drivers/i2c/i2cmux/i2cmux.c
new file mode 100644
index 0000000000..512b19f48a
--- /dev/null
+++ b/src/drivers/i2c/i2cmux/i2cmux.c
@@ -0,0 +1,44 @@
+#include <console/console.h>
+#include <device/device.h>
+#include <device/smbus.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <cpu/x86/msr.h>
+#include "chip.h"
+
+static void i2cmux_set_link(device_t dev, unsigned int link)
+{
+ if (dev->enabled && dev->path.type == DEVICE_PATH_I2C)
+ {
+ if(ops_smbus_bus(get_pbus_smbus(dev))) {
+ smbus_write_byte(dev, 0x01, 1<<link); // output value
+ smbus_write_byte(dev, 0x03, 0); // all output
+ }
+
+ }
+
+}
+static void i2cmux_noop(device_t dummy)
+{
+}
+
+static struct device_operations i2cmux_operations = {
+ .read_resources = i2cmux_noop,
+ .set_resources = i2cmux_noop,
+ .enable_resources = i2cmux_noop,
+ .init = i2cmux_noop,
+ .scan_bus = scan_static_bus,
+ .set_link = i2cmux_set_link,
+};
+
+static void enable_dev(struct device *dev)
+{
+ if(dev->links>0)
+ dev->ops = &i2cmux_operations;
+}
+
+struct chip_operations drivers_i2c_i2cmux_ops = {
+ CHIP_NAME("i2cmux")
+ .enable_dev = enable_dev,
+};