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initial checkin IPMI/BMC support
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1593 7894878c-1315-0410-8ee3-d5d059ff63e0
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Mark D. Studebaker committed
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@@ -25,6 +25,9 @@ KERNELBUSSESDIR := $(MODULE_DIR)
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# defined value verbatim into the command-list of rules...
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# These targets are NOT included in 'mkpatch' ...
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KERNELBUSSESTARGETS :=
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ifeq ($(shell if grep -q '^CONFIG_IPMI_HANDLER=' $(LINUX)/.config; then echo 1; fi),1)
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KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-ipmi.o
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endif
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KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-sis630.o
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KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-sis645.o
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@@ -0,0 +1,259 @@
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/*
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i2c-bmc.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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This implements an
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*/
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/ipmi.h>
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#include "version.h"
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static void bmc_inc_use(struct i2c_adapter *adapter);
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static void bmc_dec_use(struct i2c_adapter *adapter);
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static u32 bmc_func(struct i2c_adapter *adapter);
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#ifdef MODULE
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static
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#else
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extern
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#endif
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int __init i2c_bmc_init(void);
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static int __init bmc_cleanup(void);
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#ifdef MODULE
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extern int init_module(void);
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extern int cleanup_module(void);
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#endif /* MODULE */
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/* I2C Data */
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/* This is the actual algorithm we define */
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static struct i2c_algorithm bmc_algorithm = {
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/* name */ "IPMI algorithm",
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/* id */ I2C_ALGO_IPMI,
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/* master_xfer */ NULL,
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/* smbus_access */ NULL,
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/* slave_send */ NULL,
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/* slave_rcv */ NULL,
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/* algo_control */ NULL,
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/* functionality */ &bmc_func,
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};
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static struct i2c_adapter bmc_adapter = {
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/* name */ "IPMI adapter",
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/* id */ I2C_ALGO_IPMI | I2C_HW_IPMI,
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/* algorithm */ &bmc_algorithm,
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/* algo_data */ NULL,
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/* inc_use */ &bmc_inc_use,
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/* dec_use */ &bmc_dec_use,
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/* data */ NULL,
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/* Other fields not initialized */
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};
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/* IPMI Data */
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static ipmi_user_t i2c_bmc_user;
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static ipmi_user_t i2c_ipmi_user;
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static unsigned char ipmi_version_major;
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static unsigned char ipmi_version_minor;
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static const char msgdata[IPMI_MAX_ADDR_SIZE]; /* ?? */
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static struct ipmi_addr address = {
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IPMI_SYSTEM_INTERFACE_ADDR_TYPE,
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IPMI_BMC_CHANNEL,
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NULL
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}; /* send address */
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static struct ipmi_msg message; /* send message */
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static long msgid; /* message ID */
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static int interfaces;
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static int (*rcv_callback)(struct i2c_client *client,unsigned int cmd, void *arg);
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/* Used in bmc_init/cleanup */
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/*
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static int __initdata bmc_initialized;
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*/
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void bmc_inc_use(struct i2c_adapter *adapter)
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{
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#ifdef MODULE
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MOD_INC_USE_COUNT;
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#endif
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}
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void bmc_dec_use(struct i2c_adapter *adapter)
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{
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#ifdef MODULE
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MOD_DEC_USE_COUNT;
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#endif
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}
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/* We can't do a thing... */
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static u32 bmc_func(struct i2c_adapter *adapter)
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{
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return 0;
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}
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/*-----------------------------------*/
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void bmc_i2c_send_message(int id, struct ipmi_msg * msg)
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{
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ipmi_request(i2c_bmc_user, &address, id, msg, 0);
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}
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void bmcclient_i2c_send_message(struct i2c_client *client, int id, struct ipmi_msg * msg)
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{
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id = (id & 0xffff) | 0x10000;
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rcv_callback = client->driver->command;
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bmc_i2c_send_message(id, msg);
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}
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static void ipmi_i2c_msg_handler(struct ipmi_recv_msg *msg,
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void *handler_data)
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{
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int rcvid = msg->msgid & 0xffff;
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int client = (msg->msgid >> 16) & 0xf;
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if (msg->msg.data[0] != 0) {
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printk(KERN_ERR "IPMI BMC response: Error 0x%x on cmd 0x%x\n",
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msg->msg.data[0],
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msg->msg.cmd);
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} else {
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/*
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printk(KERN_INFO "IPMI BMC response: No error on cmd 0x%x\n",
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msg->msg.cmd);
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*/
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}
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if(client == 1 && rcv_callback != NULL)
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(*rcv_callback)(NULL, client, msg);
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else
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ipmi_free_recv_msg(msg);
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}
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static struct ipmi_user_hndl ipmi_hndlrs =
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{
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.ipmi_recv_hndl = ipmi_i2c_msg_handler,
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};
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/* callback for each BMC found */
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static void ipmi_register_bmc(int ipmi_intf)
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{
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unsigned long flags;
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int rv = -EBUSY;
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if(interfaces > 0) { /* 1 max for now */
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printk(KERN_INFO
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"i2c-bmc.o: Additional IPMI interface %d not supported\n",
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ipmi_intf);
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return;
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}
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rv = ipmi_create_user(ipmi_intf, &ipmi_hndlrs, NULL, &i2c_bmc_user);
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if (rv < 0) {
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printk(KERN_ERR "i2c-bmc.o: Unable to register with ipmi\n");
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return;
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}
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ipmi_get_version(i2c_bmc_user,
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&ipmi_version_major,
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&ipmi_version_minor);
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if ((rv = i2c_add_adapter(&bmc_adapter))) {
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printk(KERN_ERR "i2c-bmc.o: Adapter registration failed, "
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"module i2c-bmc.o is not inserted\n.");
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return;
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}
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printk(KERN_INFO
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"i2c-bmc.o: Registered IPMI interface %d with version %d.%d\n",
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ipmi_intf, ipmi_version_major, ipmi_version_minor);
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interfaces++;
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}
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static void ipmi_new_smi(int if_num)
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{
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ipmi_register_bmc(if_num);
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}
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static void ipmi_smi_gone(int if_num)
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{
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/* TBD */
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}
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static struct ipmi_smi_watcher smi_watcher =
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{
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.new_smi = ipmi_new_smi,
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.smi_gone = ipmi_smi_gone
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};
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int __init i2c_bmc_init(void)
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{
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int rv;
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printk(KERN_INFO "i2c-bmc.o version %s (%s)\n", LM_VERSION, LM_DATE);
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rv = ipmi_smi_watcher_register(&smi_watcher);
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if (rv) {
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printk(KERN_WARNING
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"ipmi_watchdog: can't register smi watcher\n");
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return rv;
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}
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printk(KERN_INFO "i2c-bmc.o: BMC access for i2c modules initialized.\n");
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return 0;
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}
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int __init bmc_cleanup(void)
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{
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ipmi_smi_watcher_unregister(&smi_watcher);
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if (interfaces >= 1) {
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i2c_del_adapter(&bmc_adapter);
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ipmi_destroy_user(i2c_bmc_user);
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interfaces--;
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}
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return 0;
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}
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#ifdef MODULE
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EXPORT_SYMBOL(bmcclient_i2c_send_message);
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MODULE_AUTHOR("M. D. Studebaker <mdsxyz123@yahoo.com>");
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MODULE_DESCRIPTION("BMC bus access through i2c");
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#ifdef MODULE_LICENSE
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MODULE_LICENSE("GPL");
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#endif
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int init_module(void)
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{
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return i2c_bmc_init();
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}
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int cleanup_module(void)
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{
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return bmc_cleanup();
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}
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#endif /* MODULE */
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