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-rw-r--r--src/superio/nuvoton/npcd378/npcd378.h44
-rw-r--r--src/superio/nuvoton/npcd378/superio.c64
2 files changed, 107 insertions, 1 deletions
diff --git a/src/superio/nuvoton/npcd378/npcd378.h b/src/superio/nuvoton/npcd378/npcd378.h
index 732dd000f3..53541a9efb 100644
--- a/src/superio/nuvoton/npcd378/npcd378.h
+++ b/src/superio/nuvoton/npcd378/npcd378.h
@@ -17,6 +17,50 @@
#ifndef SUPERIO_NUVOTON_NPCD378_H
#define SUPERIO_NUVOTON_NPCD378_H
+/* HWM at LDN8 */
+#define NPCD837_HWM_WRITE_LOCK_CTRL 0x4
+#define NPCD837_HWM_WRITE_LOCK_BIT 0x1
+
+#define NPCD378_HWM_PSU_FAN_MIN 0x17
+#define NPCD378_HWM_PSU_FAN_MAX 0xf8
+#define NPCD378_HWM_PSU_FAN_PWM_CTRL 0x198
+
+/*
+ * Read HWM register at specific page and offset.
+ *
+ * @param iobase IOBASE address of LDN8
+ * @param reg MSB is page, LSB sets the offset in selected page
+ *
+ * @return Byte read from HWM
+ */
+uint8_t npcd378_hwm_read(const uint16_t iobase, const uint16_t reg);
+
+/*
+ * Write to HWM register at specific page and offset.
+ *
+ * @param iobase IOBASE address of LDN8
+ * @param reg MSB is page, LSB sets the offset in selected page
+ * @param val The value to write to HWM register
+ */
+void npcd378_hwm_write(const uint16_t iobase, const uint16_t reg,
+ const uint8_t val);
+
+/*
+ * Notify SuperIO a host-to-device transfer is ongoing.
+ * Has to be called before any register in HWM is written to.
+ *
+ * @param iobase IOBASE address of LDN8
+ */
+void npcd378_hwm_write_start(const uint16_t iobase);
+
+/*
+ * Notify SuperIO a host-to-device transfer has finished.
+ * Has to be called after any register in HWM was written to.
+ *
+ * @param iobase IOBASE address of LDN8
+ */
+void npcd378_hwm_write_finished(const uint16_t iobase);
+
/* Logical Device Numbers (LDN). */
/* Default Nuvoton hardware: */
#define NPCD378_FDC 0x00 /* Floppy */
diff --git a/src/superio/nuvoton/npcd378/superio.c b/src/superio/nuvoton/npcd378/superio.c
index d468884c82..013225de32 100644
--- a/src/superio/nuvoton/npcd378/superio.c
+++ b/src/superio/nuvoton/npcd378/superio.c
@@ -18,24 +18,86 @@
*/
#include <arch/io.h>
+#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
+#include <option.h>
#include <pc80/keyboard.h>
#include <stdlib.h>
#include <superio/conf_mode.h>
#include "npcd378.h"
+uint8_t npcd378_hwm_read(const uint16_t iobase, const uint16_t reg)
+{
+ outb((reg >> 8) & 0xf, iobase + 0xff);
+ uint8_t reg8 = inb(iobase + (reg & 0xff));
+ if (reg8 == 0xff)
+ reg8 = inb(iobase + (reg & 0xff));
+
+ outb(0, iobase + 0xff);
+ return reg8;
+}
+
+void npcd378_hwm_write(const uint16_t iobase, const uint16_t reg,
+ const uint8_t val)
+{
+ outb((reg >> 8) & 0xf, iobase + 0xff);
+ outb(val, iobase + (reg & 0xff));
+
+ outb(0, iobase + 0xff);
+}
+
+void npcd378_hwm_write_start(const uint16_t iobase)
+{
+ u8 reg8 = npcd378_hwm_read(iobase, NPCD837_HWM_WRITE_LOCK_CTRL);
+ reg8 &= ~NPCD837_HWM_WRITE_LOCK_BIT;
+ npcd378_hwm_write(iobase, NPCD837_HWM_WRITE_LOCK_CTRL, reg8);
+}
+
+void npcd378_hwm_write_finished(const uint16_t iobase)
+{
+ u8 reg8 = npcd378_hwm_read(iobase, NPCD837_HWM_WRITE_LOCK_CTRL);
+ reg8 |= NPCD837_HWM_WRITE_LOCK_BIT;
+ npcd378_hwm_write(iobase, NPCD837_HWM_WRITE_LOCK_CTRL, reg8);
+}
+
static void npcd378_init(struct device *dev)
{
+ struct resource *res;
+ uint8_t pwm, fan_lvl;
+
if (!dev->enabled)
return;
switch (dev->path.pnp.device) {
- /* TODO: Might potentially need code for HWM or FDC etc. */
+ /* TODO: Might potentially need code for FDC etc. */
case NPCD378_KBC:
pc_keyboard_init(PROBE_AUX_DEVICE);
break;
+ case NPCD378_HWM:
+ res = find_resource(dev, PNP_IDX_IO0);
+ if (!res || !res->base) {
+ printk(BIOS_ERR, "NPCD378: LDN%u IOBASE not set.\n",
+ NPCD378_HWM);
+ break;
+ }
+
+ npcd378_hwm_write_start(res->base);
+
+ if (!get_option(&fan_lvl, "psu_fan_lvl") || fan_lvl > 7)
+ fan_lvl = 3;
+
+ pwm = NPCD378_HWM_PSU_FAN_MIN +
+ (NPCD378_HWM_PSU_FAN_MAX - NPCD378_HWM_PSU_FAN_MIN) *
+ fan_lvl / 7;
+
+ /* Set PSU fan PWM lvl */
+ npcd378_hwm_write(res->base, NPCD378_HWM_PSU_FAN_PWM_CTRL, pwm);
+ printk(BIOS_INFO, "NPCD378: PSU fan PWM 0x%02x\n", pwm);
+
+ npcd378_hwm_write_finished(res->base);
+ break;
}
}