Add basic ipmi support
Implements support code for talking to IPMI hardware that uses a KCS style interface. Change-Id: I9895cc1bf29676115b167081b63b8a430e23eee5 Signed-off-by: Sven Schnelle <svens@stackframe.org> Reviewed-on: http://review.coreboot.org/1190 Tested-by: build bot (Jenkins)
This commit is contained in:
Sven Schnelle
parent
f5062437dc
commit
7435baa5c5
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@ -27,3 +27,4 @@ source src/drivers/sil/Kconfig
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source src/drivers/trident/Kconfig
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source src/drivers/ics/Kconfig
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source src/drivers/spi/Kconfig
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source src/drivers/ipmi/Kconfig
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@ -27,4 +27,5 @@ subdirs-y += sil
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subdirs-y += trident
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subdirs-y += ics
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subdirs-y += spi
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subdirs-y += ipmi
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subdirs-$(CONFIG_ARCH_X86) += pc80
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@ -0,0 +1,3 @@
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config IPMI_KCS
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bool
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default n
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@ -0,0 +1 @@
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driver-$(CONFIG_IPMI_KCS) += ipmi_kcs.c
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@ -0,0 +1,232 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 Sven Schnelle <svens@stackframe.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <console/console.h>
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#include <device/device.h>
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#include <arch/io.h>
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#include <string.h>
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#include <delay.h>
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#include "ipmi_kcs.h"
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#define IPMI_KCS_STATE(_x) ((_x) >> 6)
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#define IPMI_KCS_GET_STATUS_ABORT
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#define IPMI_KCS_START_WRITE 0x61
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#define IPMI_KCS_END_WRITE 0x62
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#define IPMI_KCS_READ_BYTE 0x68
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#define IPMI_KCS_OBF 0x01
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#define IPMI_KCS_IBF 0x02
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#define IPMI_KCS_ATN 0x04
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#define IPMI_KCS_STATE_IDLE 0x00
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#define IPMI_KCS_STATE_READ 0x01
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#define IPMI_KCS_STATE_WRITE 0x02
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#define IPMI_KCS_STATE_ERROR 0x03
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#define IPMI_CMD(_x) ((_x) + 1)
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#define IPMI_DATA(_x) ((_x))
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#define IPMI_STAT(_x) ((_x) + 1)
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static unsigned char ipmi_kcs_status(int port)
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{
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unsigned char status = inb(IPMI_STAT(port));
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printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, status);
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return status;
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}
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static int wait_ibf_timeout(int port)
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{
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int timeout = 1000;
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do {
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if (!(ipmi_kcs_status(port) & IPMI_KCS_IBF))
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return 0;
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udelay(100);
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} while(timeout--);
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printk(BIOS_ERR, "wait_ibf timeout!\n");
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return timeout;
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}
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static int wait_obf_timeout(int port)
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{
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int timeout = 1000;
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do {
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if ((ipmi_kcs_status(port) & IPMI_KCS_OBF))
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return 0;
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udelay(100);
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} while(timeout--);
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printk(BIOS_ERR, "wait_obf timeout!\n");
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return timeout;
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}
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static int ipmi_kcs_send_data_byte(int port, const unsigned char byte)
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{
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unsigned char status;
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printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte);
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outb(byte, IPMI_DATA(port));
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if (wait_ibf_timeout(port))
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return 1;
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status = ipmi_kcs_status(port);
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if ((status & IPMI_KCS_OBF) &&
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IPMI_KCS_STATE(status) != IPMI_KCS_STATE_WRITE) {
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printk(BIOS_ERR, "%s: status %02x\n", __func__, status);
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return 1;
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}
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if (ipmi_kcs_status(port) & IPMI_KCS_OBF)
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inb(IPMI_DATA(port));
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return 0;
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}
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static int ipmi_kcs_send_last_data_byte(int port, const unsigned char byte)
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{
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unsigned char status;
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printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte);
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if (wait_ibf_timeout(port))
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return 1;
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status = ipmi_kcs_status(port);
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if ((status & IPMI_KCS_OBF) &&
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IPMI_KCS_STATE(status) != IPMI_KCS_STATE_WRITE) {
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printk(BIOS_ERR, "%s: status %02x\n", __func__, status);
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return 1;
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}
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if (ipmi_kcs_status(port) & IPMI_KCS_OBF)
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inb(IPMI_DATA(port));
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outb(byte, IPMI_DATA(port));
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return 0;
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}
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static int ipmi_kcs_send_cmd_byte(int port, const unsigned char byte)
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{
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printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, byte);
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if (wait_ibf_timeout(port))
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return 1;
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if (ipmi_kcs_status(port) & IPMI_KCS_OBF)
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inb(IPMI_DATA(port));
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outb(byte, IPMI_CMD(port));
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if (wait_ibf_timeout(port))
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return 1;
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if (ipmi_kcs_status(port) & IPMI_KCS_OBF)
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inb(IPMI_DATA(port));
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return 0;
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}
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static int ipmi_kcs_send_message(int port, int netfn, int lun, int cmd,
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const unsigned char *msg, int len)
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{
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int ret;
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if ((ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_START_WRITE))) {
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printk(BIOS_ERR, "IPMI START WRITE failed\n");
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return ret;
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}
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if ((ret = ipmi_kcs_send_data_byte(port, (netfn << 2) | (lun & 3)))) {
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printk(BIOS_ERR, "IPMI NETFN failed\n");
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return ret;
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}
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if ((ret = ipmi_kcs_send_data_byte(port, cmd))) {
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printk(BIOS_ERR, "IPMI CMD failed\n");
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return ret;
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}
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while(len-- > 1) {
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if ((ret = ipmi_kcs_send_data_byte(port, *msg++))) {
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printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
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return ret;
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}
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}
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if ((ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_END_WRITE))) {
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printk(BIOS_ERR, "IPMI END WRITE failed\n");
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return ret;
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}
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if ((ret = ipmi_kcs_send_last_data_byte(port, *msg++))) {
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printk(BIOS_ERR, "IPMI BYTE WRITE failed\n");
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return ret;
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}
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return 0;
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}
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static int ipmi_kcs_read_message(int port, unsigned char *msg, int len)
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{
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int status, ret = 0;
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if (!msg)
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return 0;
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if (wait_ibf_timeout(port))
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return 1;
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for(;;) {
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status = ipmi_kcs_status(port);
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if (IPMI_KCS_STATE(status) == IPMI_KCS_STATE_IDLE)
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return ret;
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if (IPMI_KCS_STATE(status) != IPMI_KCS_STATE_READ) {
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printk(BIOS_ERR, "%s: wrong state: 0x%02x\n", __func__, status);
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return -1;
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}
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if (wait_obf_timeout(port))
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return -1;
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*msg++ = inb(IPMI_DATA(port));
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ret++;
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if (wait_ibf_timeout(port))
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return -1;
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outb(IPMI_KCS_READ_BYTE, IPMI_DATA(port));
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}
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return ret;
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}
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int ipmi_kcs_message(int port, int netfn, int lun, int cmd,
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const unsigned char *inmsg, int inlen,
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unsigned char *outmsg, int outlen)
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{
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if (ipmi_kcs_send_message(port, netfn, lun, cmd, inmsg, inlen)) {
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printk(BIOS_ERR, "ipmi_kcs_send_message failed\n");
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return -1;
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}
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return ipmi_kcs_read_message(port, outmsg, outlen);
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}
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@ -0,0 +1,37 @@
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#ifndef __IPMI_KCS_H
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#define __IPMI_KCS_H
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 Sven Schnelle <svens@stackframe.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#define IPMI_NETFN_CHASSIS 0x00
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#define IPMI_NETFN_BRIDGE 0x02
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#define IPMI_NETFN_SENSOREVENT 0x04
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#define IPMI_NETFN_APPLICATION 0x06
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#define IPMI_NETFN_FIRMWARE 0x08
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#define IPMI_NETFN_STORAGE 0x0a
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#define IPMI_NETFN_TRANSPORT 0x0c
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#define IPMI_CMD_ACPI_POWERON 0x06
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extern int ipmi_kcs_message(int port, int netfn, int lun, int cmd,
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const unsigned char *inmsg, int inlen,
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unsigned char *outmsg, int outlen);
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#endif
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