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831eb7ef7e
We can switch to LDN 0x11 and read the IO base address for the PM1 legacy port rather than hardcoding data and command ports.
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
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* Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "config.h"
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#include <sys/errno.h>
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#include <unistd.h>
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#include "fu-superio-common.h"
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gboolean
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fu_superio_outb (gint fd, guint16 port, guint8 data, GError **error)
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{
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if (pwrite (fd, &data, 1, (goffset) port) != 1) {
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_FAILED,
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"failed to write to port %04x: %s",
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(guint) port,
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strerror (errno));
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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fu_superio_inb (gint fd, guint16 port, guint8 *data, GError **error)
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{
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if (pread (fd, data, 1, (goffset) port) != 1) {
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_FAILED,
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"failed to read from port %04x: %s",
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(guint) port,
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strerror (errno));
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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fu_superio_regval (gint fd, guint16 port, guint8 addr,
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guint8 *data, GError **error)
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{
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if (!fu_superio_outb (fd, port, addr, error))
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return FALSE;
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if (!fu_superio_inb (fd, port + 1, data, error))
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return FALSE;
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return TRUE;
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}
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gboolean
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fu_superio_regval16 (gint fd, guint16 port, guint8 addr,
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guint16 *data, GError **error)
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{
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guint8 msb;
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guint8 lsb;
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if (!fu_superio_regval (fd, port, addr, &msb, error))
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return FALSE;
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if (!fu_superio_regval (fd, port, addr + 1, &lsb, error))
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return FALSE;
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*data = ((guint16) msb << 8) | (guint16) lsb;
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return TRUE;
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}
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gboolean
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fu_superio_regwrite (gint fd, guint16 port, guint8 addr,
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guint8 data, GError **error)
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{
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if (!fu_superio_outb (fd, port, addr, error))
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return FALSE;
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if (!fu_superio_outb (fd, port + 1, data, error))
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return FALSE;
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return TRUE;
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}
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gboolean
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fu_superio_set_ldn (gint fd, guint16 port, guint8 ldn, GError **error)
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{
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return fu_superio_regwrite (fd, port, LDN_SEL, ldn, error);
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}
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gboolean
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fu_superio_regdump (gint fd, guint16 port, guint8 ldn, GError **error)
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{
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g_autofree gchar *title = NULL;
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guint8 buf[0xff] = { 0x00 };
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/* set LDN */
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if (!fu_superio_set_ldn (fd, port, ldn, error))
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return FALSE;
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for (guint i = 0x00; i < 0xff; i++) {
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if (!fu_superio_regval (fd, port, i, &buf[i], error))
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return FALSE;
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}
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title = g_strdup_printf ("PORT:0x%04x LDN:0x%02x", port, ldn);
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fu_common_dump_raw (G_LOG_DOMAIN, title, buf, 0x100);
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return TRUE;
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}
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