i2c mux support

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1809 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 68 insertions, 0 deletions

diff --git a/src/drivers/i2c/adm1026/adm1026.c b/src/drivers/i2c/adm1026/adm1026.c
new file mode 100644
index 0000000000..f1d61b4039
--- /dev/null
+++ b/src/drivers/i2c/adm1026/adm1026.c
@@ -0,0 +1,68 @@
+#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 <part/hard_reset.h>
+#include <cpu/x86/msr.h>
+#include "chip.h"
+
+#define ADM1026_DEVICE 0x2c /* 0x2e or 0x2d */
+#define ADM1026_REG_CONFIG1 0x00
+#define CFG1_MONITOR     0x01
+#define CFG1_INT_ENABLE  0x02
+#define CFG1_INT_CLEAR   0x04
+#define CFG1_AIN8_9      0x08
+#define CFG1_THERM_HOT   0x10
+#define CFT1_DAC_AFC     0x20
+#define CFG1_PWM_AFC     0x40
+#define CFG1_RESET       0x80
+#define ADM1026_REG_CONFIG2 0x01
+#define ADM1026_REG_CONFIG3 0x07
+
+static void adm1026_init(device_t dev)
+{
+	if (dev->enabled && dev->path.type == DEVICE_PATH_I2C)
+	{
+		if(ops_smbus_bus(get_pbus_smbus(dev))) {
+			if( dev->bus->dev->path.type == DEVICE_PATH_I2C) smbus_set_link(dev); // it is under mux 
+			adm1026_enable_monitoring(dev);
+		}
+		
+	}
+
+}
+static void adm1026_enable_monitoring(device_t dev)
+{
+        int result;
+        result = smbus_read_byte(dev, ADM1026_REG_CONFIG1);
+
+        result = (result | CFG1_MONITOR) & ~(CFG1_INT_CLEAR | CFG1_RESET);
+        result = smbus_write_byte(dev, ADM1026_REG_CONFIG1, result);
+
+        result = smbus_read_byte(dev, ADM1026_REG_CONFIG1);
+        if (!(result & CFG1_MONITOR)) {
+                printk_debug("ADM1026: monitoring would not enable");
+        }
+}
+static void adm1026_noop(device_t dummy)
+{
+}
+
+static struct device_operations adm1026_operations = {
+        .read_resources   = adm1026_noop,
+        .set_resources    = adm1026_noop,
+        .enable_resources = adm1026_noop,
+        .init             = adm1026_init,
+};
+
+static void enable_dev(struct device *dev)
+{
+	dev->ops = &adm1026_operations;
+}
+
+struct chip_operations drivers_i2c_adm1026_ops = {
+	CHIP_NAME("adm1026")
+	.enable_dev = enable_dev, 
+};