Sven Schnelle (svens@stackframe.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1190
-gerrit
commit 74f763f19e2fc582b4ab064e66a9c82bec0e65e2 Author: Sven Schnelle svens@stackframe.org Date: Sun Jul 8 18:32:23 2012 +0200
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 --- src/drivers/Kconfig | 1 + src/drivers/Makefile.inc | 1 + src/drivers/ipmi/Kconfig | 3 + src/drivers/ipmi/Makefile.inc | 1 + src/drivers/ipmi/ipmi_kcs.c | 232 +++++++++++++++++++++++++++++++++++++++++ src/drivers/ipmi/ipmi_kcs.h | 37 +++++++ 6 files changed, 275 insertions(+), 0 deletions(-)
diff --git a/src/drivers/Kconfig b/src/drivers/Kconfig index 60e5b65..89cdf6a 100644 --- a/src/drivers/Kconfig +++ b/src/drivers/Kconfig @@ -27,3 +27,4 @@ source src/drivers/sil/Kconfig source src/drivers/trident/Kconfig source src/drivers/ics/Kconfig source src/drivers/spi/Kconfig +source src/drivers/ipmi/Kconfig diff --git a/src/drivers/Makefile.inc b/src/drivers/Makefile.inc index 851a4df..6c63a6a 100644 --- a/src/drivers/Makefile.inc +++ b/src/drivers/Makefile.inc @@ -27,4 +27,5 @@ subdirs-y += sil subdirs-y += trident subdirs-y += ics subdirs-y += spi +subdirs-y += ipmi subdirs-$(CONFIG_ARCH_X86) += pc80 diff --git a/src/drivers/ipmi/Kconfig b/src/drivers/ipmi/Kconfig new file mode 100644 index 0000000..55c85ea --- /dev/null +++ b/src/drivers/ipmi/Kconfig @@ -0,0 +1,3 @@ +config IPMI_KCS + bool + default n diff --git a/src/drivers/ipmi/Makefile.inc b/src/drivers/ipmi/Makefile.inc new file mode 100644 index 0000000..ecee28f --- /dev/null +++ b/src/drivers/ipmi/Makefile.inc @@ -0,0 +1 @@ +driver-$(CONFIG_IPMI_KCS) += ipmi_kcs.c diff --git a/src/drivers/ipmi/ipmi_kcs.c b/src/drivers/ipmi/ipmi_kcs.c new file mode 100644 index 0000000..9be1433 --- /dev/null +++ b/src/drivers/ipmi/ipmi_kcs.c @@ -0,0 +1,232 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Sven Schnelle svens@stackframe.org + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <console/console.h> +#include <device/device.h> +#include <arch/io.h> +#include <string.h> +#include <delay.h> +#include "ipmi_kcs.h" + +#define IPMI_KCS_STATE(_x) ((_x) >> 6) + +#define IPMI_KCS_GET_STATUS_ABORT +#define IPMI_KCS_START_WRITE 0x61 +#define IPMI_KCS_END_WRITE 0x62 +#define IPMI_KCS_READ_BYTE 0x68 + +#define IPMI_KCS_OBF 0x01 +#define IPMI_KCS_IBF 0x02 +#define IPMI_KCS_ATN 0x04 + +#define IPMI_KCS_STATE_IDLE 0x00 +#define IPMI_KCS_STATE_READ 0x01 +#define IPMI_KCS_STATE_WRITE 0x02 +#define IPMI_KCS_STATE_ERROR 0x03 + +#define IPMI_CMD(_x) ((_x) + 1) +#define IPMI_DATA(_x) ((_x)) +#define IPMI_STAT(_x) ((_x) + 1) + +static unsigned char ipmi_kcs_status(int port) +{ + unsigned char status = inb(IPMI_STAT(port)); + printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, status); + return status; +} + +static int wait_ibf_timeout(int port) +{ + int timeout = 1000; + do { + if (!(ipmi_kcs_status(port) & IPMI_KCS_IBF)) + return 0; + udelay(100); + } while(timeout--); + printk(BIOS_ERR, "wait_ibf timeout!\n"); + return timeout; +} + +static int wait_obf_timeout(int port) +{ + int timeout = 1000; + do { + if ((ipmi_kcs_status(port) & IPMI_KCS_OBF)) + return 0; + udelay(100); + } while(timeout--); + + printk(BIOS_ERR, "wait_obf timeout!\n"); + return timeout; +} + + +static int ipmi_kcs_send_data_byte(int port, const unsigned char byte) +{ + unsigned char status; + + printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte); + + outb(byte, IPMI_DATA(port)); + + if (wait_ibf_timeout(port)) + return 1; + + status = ipmi_kcs_status(port); + if ((status & IPMI_KCS_OBF) && + IPMI_KCS_STATE(status) != IPMI_KCS_STATE_WRITE) { + printk(BIOS_ERR, "%s: status %02x\n", __func__, status); + return 1; + } + + if (ipmi_kcs_status(port) & IPMI_KCS_OBF) + inb(IPMI_DATA(port)); + return 0; +} + +static int ipmi_kcs_send_last_data_byte(int port, const unsigned char byte) +{ + unsigned char status; + + printk(BIOS_DEBUG, "%s: %02x\n", __func__, byte); + + if (wait_ibf_timeout(port)) + return 1; + + status = ipmi_kcs_status(port); + if ((status & IPMI_KCS_OBF) && + IPMI_KCS_STATE(status) != IPMI_KCS_STATE_WRITE) { + printk(BIOS_ERR, "%s: status %02x\n", __func__, status); + return 1; + } + + if (ipmi_kcs_status(port) & IPMI_KCS_OBF) + inb(IPMI_DATA(port)); + + outb(byte, IPMI_DATA(port)); + return 0; +} + +static int ipmi_kcs_send_cmd_byte(int port, const unsigned char byte) +{ + printk(BIOS_DEBUG, "%s: 0x%02x\n", __func__, byte); + + if (wait_ibf_timeout(port)) + return 1; + + if (ipmi_kcs_status(port) & IPMI_KCS_OBF) + inb(IPMI_DATA(port)); + outb(byte, IPMI_CMD(port)); + + if (wait_ibf_timeout(port)) + return 1; + + if (ipmi_kcs_status(port) & IPMI_KCS_OBF) + inb(IPMI_DATA(port)); + + return 0; +} + +static int ipmi_kcs_send_message(int port, int netfn, int lun, int cmd, + const unsigned char *msg, int len) +{ + int ret; + + if ((ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_START_WRITE))) { + printk(BIOS_ERR, "IPMI START WRITE failed\n"); + return ret; + } + + if ((ret = ipmi_kcs_send_data_byte(port, (netfn << 2) | (lun & 3)))) { + printk(BIOS_ERR, "IPMI NETFN failed\n"); + return ret; + } + + if ((ret = ipmi_kcs_send_data_byte(port, cmd))) { + printk(BIOS_ERR, "IPMI CMD failed\n"); + return ret; + } + + while(len-- > 1) { + if ((ret = ipmi_kcs_send_data_byte(port, *msg++))) { + printk(BIOS_ERR, "IPMI BYTE WRITE failed\n"); + return ret; + } + } + + if ((ret = ipmi_kcs_send_cmd_byte(port, IPMI_KCS_END_WRITE))) { + printk(BIOS_ERR, "IPMI END WRITE failed\n"); + return ret; + } + + if ((ret = ipmi_kcs_send_last_data_byte(port, *msg++))) { + printk(BIOS_ERR, "IPMI BYTE WRITE failed\n"); + return ret; + } + return 0; +} + +static int ipmi_kcs_read_message(int port, unsigned char *msg, int len) +{ + int status, ret = 0; + + if (!msg) + return 0; + + if (wait_ibf_timeout(port)) + return 1; + + for(;;) { + status = ipmi_kcs_status(port); + + if (IPMI_KCS_STATE(status) == IPMI_KCS_STATE_IDLE) + return ret; + + if (IPMI_KCS_STATE(status) != IPMI_KCS_STATE_READ) { + printk(BIOS_ERR, "%s: wrong state: 0x%02x\n", __func__, status); + return -1; + } + + if (wait_obf_timeout(port)) + return -1; + + *msg++ = inb(IPMI_DATA(port)); + ret++; + + if (wait_ibf_timeout(port)) + return -1; + + outb(IPMI_KCS_READ_BYTE, IPMI_DATA(port)); + } + return ret; +} + +int ipmi_kcs_message(int port, int netfn, int lun, int cmd, + const unsigned char *inmsg, int inlen, + unsigned char *outmsg, int outlen) +{ + if (ipmi_kcs_send_message(port, netfn, lun, cmd, inmsg, inlen)) { + printk(BIOS_ERR, "ipmi_kcs_send_message failed\n"); + return -1; + } + + return ipmi_kcs_read_message(port, outmsg, outlen); +} diff --git a/src/drivers/ipmi/ipmi_kcs.h b/src/drivers/ipmi/ipmi_kcs.h new file mode 100644 index 0000000..cc4156a --- /dev/null +++ b/src/drivers/ipmi/ipmi_kcs.h @@ -0,0 +1,37 @@ +#ifndef __IPMI_KCS_H +#define __IPMI_KCS_H +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Sven Schnelle svens@stackframe.org + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#define IPMI_NETFN_CHASSIS 0x00 +#define IPMI_NETFN_BRIDGE 0x02 +#define IPMI_NETFN_SENSOREVENT 0x04 +#define IPMI_NETFN_APPLICATION 0x06 +#define IPMI_NETFN_FIRMWARE 0x08 +#define IPMI_NETFN_STORAGE 0x0a +#define IPMI_NETFN_TRANSPORT 0x0c + +#define IPMI_CMD_ACPI_POWERON 0x06 + +extern int ipmi_kcs_message(int port, int netfn, int lun, int cmd, + const unsigned char *inmsg, int inlen, + unsigned char *outmsg, int outlen); +#endif