/*
+ * This file is part of the coreboot project.
+ *
* Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software; you can redistribute it and/or modify
#include "it8671f.h"
/* The base address is 0x3f0, 0x3bd, or 0x370, depending on config bytes. */
-#define SIO_BASE 0x3f0
-#define SIO_INDEX SIO_BASE
-#define SIO_DATA SIO_BASE+1
+#define SIO_BASE 0x3f0
+#define SIO_INDEX SIO_BASE
+#define SIO_DATA (SIO_BASE + 1)
-/* Global Configuration Registers. */
+/* Global configuration registers. */
#define IT8671F_CONFIG_REG_CC 0x02 /* Configure Control (write-only). */
#define IT8671F_CONFIG_REG_LDN 0x07 /* Logical Device Number. */
#define IT8671F_CONFIG_REG_LDE 0x23 /* PnP Logical Device Enable. */
#define IT8671F_CONFIG_REG_SWSUSP 0x24 /* Software Suspend. */
#define IT8671F_CONFIGURATION_PORT 0x0279 /* Write-only. */
-#define IT8671F_WRITE_DATA_PORT 0x0A79 /* Write-only. */
-/* Special values used for entering MB PnP mode. The first four bytes of
- * each line determine the address port, the last four are data. */
-static const uint8_t init_values[] = {
+/*
+ * Special values used for entering MB PnP mode. The first four bytes of
+ * each line determine the address port, the last four are data.
+ */
+static const u8 init_values[] = {
0x6a, 0xb5, 0xda, 0xed, /**/ 0xf6, 0xfb, 0x7d, 0xbe,
0xdf, 0x6f, 0x37, 0x1b, /**/ 0x0d, 0x86, 0xc3, 0x61,
0xb0, 0x58, 0x2c, 0x16, /**/ 0x8b, 0x45, 0xa2, 0xd1,
0xe8, 0x74, 0x3a, 0x9d, /**/ 0xce, 0xe7, 0x73, 0x39,
};
-/* The content of IT8671F_CONFIG_REG_LDN (index 0x07) must be set to the
- * LDN the register belongs to, before you can access the register. */
-static void it8671f_sio_write(uint8_t ldn, uint8_t index, uint8_t value)
+static void it8671f_sio_write(u8 ldn, u8 index, u8 value)
{
outb(IT8671F_CONFIG_REG_LDN, SIO_BASE);
outb(ldn, SIO_DATA);
outb(value, SIO_DATA);
}
-/* Enable the peripheral devices on the IT8671F Super IO chip. */
-static void it8671f_enable_serial(device_t dev, unsigned iobase)
+/* Enter the configuration state (MB PnP mode). */
+static void it8671f_enter_conf(void)
{
- uint8_t i;
-
- /* (1) Enter the configuration state (MB PnP mode). */
+ int i;
/* Perform MB PnP setup to put the SIO chip at 0x3f0. */
/* Base address 0x3f0: 0x86 0x80 0x55 0x55. */
outb(0x55, IT8671F_CONFIGURATION_PORT);
/* Sequentially write the 32 special values. */
- for (i = 0; i < 32; i++) {
+ for (i = 0; i < 32; i++)
outb(init_values[i], SIO_BASE);
- }
+}
+
+/* Exit the configuration state (MB PnP mode). */
+static void it8671f_exit_conf(void)
+{
+ it8671f_sio_write(0x00, IT8671F_CONFIG_REG_CC, 0x02);
+}
- /* (2) Modify the data of configuration registers. */
+/* Select 48MHz CLKIN (24MHz is the default). */
+void it8671f_48mhz_clkin(void)
+{
+ it8671f_enter_conf();
+ it8671f_sio_write(0x00, IT8671F_CONFIG_REG_SWSUSP, (1 << 6));
+ it8671f_exit_conf();
+}
- /* Allow all devices to be enabled. Bits: FDC (0), Com1 (1), Com2 (2),
- PP (3), Reserved (4), KBCK (5), KBCM (6), Reserved (7). */
- it8671f_sio_write(0x00, IT8671F_CONFIG_REG_LDE, 0x6f);
+/* Enable the serial port(s). */
+static void it8671f_enable_serial(device_t dev, u16 iobase)
+{
+ it8671f_enter_conf();
- /* Activate all devices. */
- it8671f_sio_write(IT8671F_FDC, 0x30, 0x01); /* Floppy */
- it8671f_sio_write(IT8671F_SP1, 0x30, 0x01); /* Serial port 1 */
- it8671f_sio_write(IT8671F_SP2, 0x30, 0x01); /* Serial port 2 */
- it8671f_sio_write(IT8671F_PP, 0x30, 0x01); /* Parallel port */
- it8671f_sio_write(IT8671F_KBCK, 0x30, 0x01); /* Keyboard */
- it8671f_sio_write(IT8671F_KBCM, 0x30, 0x01); /* Mouse */
+ /*
+ * Allow all devices to be enabled. Bits: FDC (0), Com1 (1), Com2 (2),
+ * PP (3), Reserved (4), KBCK (5), KBCM (6), Reserved (7).
+ */
+ it8671f_sio_write(0x00, IT8671F_CONFIG_REG_LDE, 0x6f);
- /* Select 24MHz CLKIN (clear bit 6) and clear software suspend
- mode (clear bit 0). */
- it8671f_sio_write(0x00, IT8671F_CONFIG_REG_SWSUSP, 0x00);
+ /* Enable serial port(s). */
+ it8671f_sio_write(IT8671F_SP1, 0x30, 0x01); /* Serial port 1 */
+ it8671f_sio_write(IT8671F_SP2, 0x30, 0x01); /* Serial port 2 */
- /* (3) Exit the configuration state (MB PnP mode). */
- it8671f_sio_write(0x00, IT8671F_CONFIG_REG_CC, 0x02);
+ it8671f_exit_conf();
}
-