summaryrefslogtreecommitdiff
path: root/src/drivers/i2c/nct7802y/nct7802y.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/drivers/i2c/nct7802y/nct7802y.h')
-rw-r--r--src/drivers/i2c/nct7802y/nct7802y.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/drivers/i2c/nct7802y/nct7802y.h b/src/drivers/i2c/nct7802y/nct7802y.h
new file mode 100644
index 0000000000..16a16840f3
--- /dev/null
+++ b/src/drivers/i2c/nct7802y/nct7802y.h
@@ -0,0 +1,104 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 secunet Security Networks AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef DRIVERS_I2C_NCT7802Y_H
+#define DRIVERS_I2C_NCT7802Y_H
+
+#include <types.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/i2c_bus.h>
+
+#define BANK_SELECT 0x00
+
+/* Bank 0 */
+
+#define PECI_ENABLE 0x23
+#define PECI_ENABLE_AGENTx(x) (1 << (x))
+
+#define FAN_ENABLE 0x24
+#define FANx_ENABLE(fan) (1 << (fan))
+
+#define FAN_CTRL(fan) (0x60 + (fan))
+
+#define CLOSE_LOOP_FAN_RPM_CTRL 0x63
+#define CLOSE_LOOP_FANx_EN(fan) (1 << ((fan) + 5))
+#define CLOSE_LOOP_FANx_HIGH_RPM(fan) (1 << ((fan) + 2))
+#define CLOSE_LOOP_FAN_PECI_ERR_MASK (3 << 0)
+#define CLOSE_LOOP_FAN_PECI_ERR_CURR (0 << 0)
+#define CLOSE_LOOP_FAN_PECI_ERR_VALUE (1 << 0)
+#define CLOSE_LOOP_FAN_PECI_ERR_MAX (2 << 0)
+
+#define TEMP_SHIFT(temp) (((temp) % 2) * 4)
+#define TEMP_TO_FAN_MAP(temp) (0x64 + (temp) / 2)
+#define TEMPx_TO_FAN_MAP_MASK(temp) (7 << TEMP_SHIFT(temp))
+#define TEMPx_TO_FANy_MAP(temp, fan) (1 << (TEMP_SHIFT(temp) + (fan)))
+
+#define FAN_CTRL_TEMP_SRC(temp) (0x68 + (temp) / 2)
+#define FAN_CTRL_TEMPx_SRC_MASK(temp) (7 << TEMP_SHIFT(temp))
+#define FAN_CTRL_TEMPx_SRCy(temp, src) ((src) << TEMP_SHIFT(temp))
+
+#define FAN_DUTY_ON_PECI_ERROR 0x7a
+
+#define TABLEx_TEMP_POINTy(fan, pt) (0x80 + (0x10 * (fan)) + (pt))
+#define TABLEx_TARGET_POINTy(fan, pt) (0x85 + (0x10 * (fan)) + (pt))
+
+/* Bank 1 */
+
+#define PECI_CTRL_1 0x01
+#define PECI_CTRL_1_EN (1 << 7)
+#define PECI_CTRL_1_MANUAL_EN (1 << 1)
+#define PECI_CTRL_1_ROUTINE_EN (1 << 0)
+
+#define PECI_CTRL_3 0x03
+#define PECI_CTRL_3_EN_AGENTx(x) (1 << ((x) + 4))
+#define PECI_CTRL_3_HAS_DOM1_AGENTx(x) (1 << (x))
+
+#define PECI_REPORT_TEMP_STYLE 0x04
+#define PECI_TEMP_STYLE_DOM0_AGENTx(x) (0 << ((x) + 1))
+#define PECI_TEMP_STYLE_DOM1_AGENTx(x) (1 << ((x) + 1))
+#define PECI_TEMP_STYLE_SINGLE (0 << 0)
+#define PECI_TEMP_STYLE_HIGHEST (1 << 0)
+
+#define PECI_BASE_TEMP_AGENT(x) (0x09 + (x))
+#define PECI_BASE_TEMP_MAX (0x7f << 0)
+
+static inline int nct7802y_select_bank(struct device *const dev, const u8 bank)
+{
+ const int ret = i2c_dev_writeb_at(dev, BANK_SELECT, bank);
+ if (ret != CB_SUCCESS)
+ printk(BIOS_NOTICE, "nct7802y: Select bank failed: %d\n", ret);
+ return ret;
+}
+
+static inline int nct7802y_write(struct device *const dev,
+ const u8 reg, const u8 value)
+{
+ return i2c_dev_writeb_at(dev, reg, value);
+}
+
+static inline int nct7802y_update(struct device *const dev, const u8 reg,
+ const u8 clear_mask, const u8 set_mask)
+{
+ const int val = i2c_dev_readb_at(dev, reg);
+ if (val < 0)
+ return val;
+ return i2c_dev_writeb_at(dev, reg, (val & ~clear_mask) | set_mask);
+}
+
+void nct7802y_init_fan(struct device *dev);
+void nct7802y_init_peci(struct device *dev);
+
+#endif /* DRIVERS_I2C_NCT7802Y_H */