Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / char / ipmi / ipmi_smic_sm.c
diff --git a/kernel/drivers/char/ipmi/ipmi_smic_sm.c b/kernel/drivers/char/ipmi/ipmi_smic_sm.c
new file mode 100644 (file)
index 0000000..c8e77af
--- /dev/null
@@ -0,0 +1,600 @@
+/*
+ * ipmi_smic_sm.c
+ *
+ * The state-machine driver for an IPMI SMIC driver
+ *
+ * It started as a copy of Corey Minyard's driver for the KSC interface
+ * and the kernel patch "mmcdev-patch-245" by HP
+ *
+ * modified by:        Hannes Schulz <schulz@schwaar.com>
+ *             ipmi@schwaar.com
+ *
+ *
+ * Corey Minyard's driver for the KSC interface has the following
+ * copyright notice:
+ *   Copyright 2002 MontaVista Software Inc.
+ *
+ * the kernel patch "mmcdev-patch-245" by HP has the following
+ * copyright notice:
+ * (c) Copyright 2001 Grant Grundler (c) Copyright
+ * 2001 Hewlett-Packard Company
+ *
+ *
+ *  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; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <linux/kernel.h> /* For printk. */
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ipmi_msgdefs.h>                /* for completion codes */
+#include "ipmi_si_sm.h"
+
+/* smic_debug is a bit-field
+ *     SMIC_DEBUG_ENABLE -     turned on for now
+ *     SMIC_DEBUG_MSG -        commands and their responses
+ *     SMIC_DEBUG_STATES -     state machine
+*/
+#define SMIC_DEBUG_STATES      4
+#define SMIC_DEBUG_MSG         2
+#define        SMIC_DEBUG_ENABLE       1
+
+static int smic_debug = 1;
+module_param(smic_debug, int, 0644);
+MODULE_PARM_DESC(smic_debug, "debug bitmask, 1=enable, 2=messages, 4=states");
+
+enum smic_states {
+       SMIC_IDLE,
+       SMIC_START_OP,
+       SMIC_OP_OK,
+       SMIC_WRITE_START,
+       SMIC_WRITE_NEXT,
+       SMIC_WRITE_END,
+       SMIC_WRITE2READ,
+       SMIC_READ_START,
+       SMIC_READ_NEXT,
+       SMIC_READ_END,
+       SMIC_HOSED
+};
+
+#define MAX_SMIC_READ_SIZE 80
+#define MAX_SMIC_WRITE_SIZE 80
+#define SMIC_MAX_ERROR_RETRIES 3
+
+/* Timeouts in microseconds. */
+#define SMIC_RETRY_TIMEOUT (2*USEC_PER_SEC)
+
+/* SMIC Flags Register Bits */
+#define SMIC_RX_DATA_READY     0x80
+#define SMIC_TX_DATA_READY     0x40
+
+/*
+ * SMIC_SMI and SMIC_EVM_DATA_AVAIL are only used by
+ * a few systems, and then only by Systems Management
+ * Interrupts, not by the OS.  Always ignore these bits.
+ *
+ */
+#define SMIC_SMI               0x10
+#define SMIC_EVM_DATA_AVAIL    0x08
+#define SMIC_SMS_DATA_AVAIL    0x04
+#define SMIC_FLAG_BSY          0x01
+
+/* SMIC Error Codes */
+#define        EC_NO_ERROR             0x00
+#define        EC_ABORTED              0x01
+#define        EC_ILLEGAL_CONTROL      0x02
+#define        EC_NO_RESPONSE          0x03
+#define        EC_ILLEGAL_COMMAND      0x04
+#define        EC_BUFFER_FULL          0x05
+
+struct si_sm_data {
+       enum smic_states state;
+       struct si_sm_io *io;
+       unsigned char    write_data[MAX_SMIC_WRITE_SIZE];
+       int              write_pos;
+       int              write_count;
+       int              orig_write_count;
+       unsigned char    read_data[MAX_SMIC_READ_SIZE];
+       int              read_pos;
+       int              truncated;
+       unsigned int     error_retries;
+       long             smic_timeout;
+};
+
+static unsigned int init_smic_data(struct si_sm_data *smic,
+                                  struct si_sm_io *io)
+{
+       smic->state = SMIC_IDLE;
+       smic->io = io;
+       smic->write_pos = 0;
+       smic->write_count = 0;
+       smic->orig_write_count = 0;
+       smic->read_pos = 0;
+       smic->error_retries = 0;
+       smic->truncated = 0;
+       smic->smic_timeout = SMIC_RETRY_TIMEOUT;
+
+       /* We use 3 bytes of I/O. */
+       return 3;
+}
+
+static int start_smic_transaction(struct si_sm_data *smic,
+                                 unsigned char *data, unsigned int size)
+{
+       unsigned int i;
+
+       if (size < 2)
+               return IPMI_REQ_LEN_INVALID_ERR;
+       if (size > MAX_SMIC_WRITE_SIZE)
+               return IPMI_REQ_LEN_EXCEEDED_ERR;
+
+       if ((smic->state != SMIC_IDLE) && (smic->state != SMIC_HOSED))
+               return IPMI_NOT_IN_MY_STATE_ERR;
+
+       if (smic_debug & SMIC_DEBUG_MSG) {
+               printk(KERN_DEBUG "start_smic_transaction -");
+               for (i = 0; i < size; i++)
+                       printk(" %02x", (unsigned char) data[i]);
+               printk("\n");
+       }
+       smic->error_retries = 0;
+       memcpy(smic->write_data, data, size);
+       smic->write_count = size;
+       smic->orig_write_count = size;
+       smic->write_pos = 0;
+       smic->read_pos = 0;
+       smic->state = SMIC_START_OP;
+       smic->smic_timeout = SMIC_RETRY_TIMEOUT;
+       return 0;
+}
+
+static int smic_get_result(struct si_sm_data *smic,
+                          unsigned char *data, unsigned int length)
+{
+       int i;
+
+       if (smic_debug & SMIC_DEBUG_MSG) {
+               printk(KERN_DEBUG "smic_get result -");
+               for (i = 0; i < smic->read_pos; i++)
+                       printk(" %02x", smic->read_data[i]);
+               printk("\n");
+       }
+       if (length < smic->read_pos) {
+               smic->read_pos = length;
+               smic->truncated = 1;
+       }
+       memcpy(data, smic->read_data, smic->read_pos);
+
+       if ((length >= 3) && (smic->read_pos < 3)) {
+               data[2] = IPMI_ERR_UNSPECIFIED;
+               smic->read_pos = 3;
+       }
+       if (smic->truncated) {
+               data[2] = IPMI_ERR_MSG_TRUNCATED;
+               smic->truncated = 0;
+       }
+       return smic->read_pos;
+}
+
+static inline unsigned char read_smic_flags(struct si_sm_data *smic)
+{
+       return smic->io->inputb(smic->io, 2);
+}
+
+static inline unsigned char read_smic_status(struct si_sm_data *smic)
+{
+       return smic->io->inputb(smic->io, 1);
+}
+
+static inline unsigned char read_smic_data(struct si_sm_data *smic)
+{
+       return smic->io->inputb(smic->io, 0);
+}
+
+static inline void write_smic_flags(struct si_sm_data *smic,
+                                   unsigned char   flags)
+{
+       smic->io->outputb(smic->io, 2, flags);
+}
+
+static inline void write_smic_control(struct si_sm_data *smic,
+                                     unsigned char   control)
+{
+       smic->io->outputb(smic->io, 1, control);
+}
+
+static inline void write_si_sm_data(struct si_sm_data *smic,
+                                   unsigned char   data)
+{
+       smic->io->outputb(smic->io, 0, data);
+}
+
+static inline void start_error_recovery(struct si_sm_data *smic, char *reason)
+{
+       (smic->error_retries)++;
+       if (smic->error_retries > SMIC_MAX_ERROR_RETRIES) {
+               if (smic_debug & SMIC_DEBUG_ENABLE)
+                       printk(KERN_WARNING
+                              "ipmi_smic_drv: smic hosed: %s\n", reason);
+               smic->state = SMIC_HOSED;
+       } else {
+               smic->write_count = smic->orig_write_count;
+               smic->write_pos = 0;
+               smic->read_pos = 0;
+               smic->state = SMIC_START_OP;
+               smic->smic_timeout = SMIC_RETRY_TIMEOUT;
+       }
+}
+
+static inline void write_next_byte(struct si_sm_data *smic)
+{
+       write_si_sm_data(smic, smic->write_data[smic->write_pos]);
+       (smic->write_pos)++;
+       (smic->write_count)--;
+}
+
+static inline void read_next_byte(struct si_sm_data *smic)
+{
+       if (smic->read_pos >= MAX_SMIC_READ_SIZE) {
+               read_smic_data(smic);
+               smic->truncated = 1;
+       } else {
+               smic->read_data[smic->read_pos] = read_smic_data(smic);
+               smic->read_pos++;
+       }
+}
+
+/*  SMIC Control/Status Code Components */
+#define        SMIC_GET_STATUS         0x00    /* Control form's name */
+#define        SMIC_READY              0x00    /* Status  form's name */
+#define        SMIC_WR_START           0x01    /* Unified Control/Status names... */
+#define        SMIC_WR_NEXT            0x02
+#define        SMIC_WR_END             0x03
+#define        SMIC_RD_START           0x04
+#define        SMIC_RD_NEXT            0x05
+#define        SMIC_RD_END             0x06
+#define        SMIC_CODE_MASK          0x0f
+
+#define        SMIC_CONTROL            0x00
+#define        SMIC_STATUS             0x80
+#define        SMIC_CS_MASK            0x80
+
+#define        SMIC_SMS                0x40
+#define        SMIC_SMM                0x60
+#define        SMIC_STREAM_MASK        0x60
+
+/*  SMIC Control Codes */
+#define        SMIC_CC_SMS_GET_STATUS  (SMIC_CONTROL|SMIC_SMS|SMIC_GET_STATUS)
+#define        SMIC_CC_SMS_WR_START    (SMIC_CONTROL|SMIC_SMS|SMIC_WR_START)
+#define        SMIC_CC_SMS_WR_NEXT     (SMIC_CONTROL|SMIC_SMS|SMIC_WR_NEXT)
+#define        SMIC_CC_SMS_WR_END      (SMIC_CONTROL|SMIC_SMS|SMIC_WR_END)
+#define        SMIC_CC_SMS_RD_START    (SMIC_CONTROL|SMIC_SMS|SMIC_RD_START)
+#define        SMIC_CC_SMS_RD_NEXT     (SMIC_CONTROL|SMIC_SMS|SMIC_RD_NEXT)
+#define        SMIC_CC_SMS_RD_END      (SMIC_CONTROL|SMIC_SMS|SMIC_RD_END)
+
+#define        SMIC_CC_SMM_GET_STATUS  (SMIC_CONTROL|SMIC_SMM|SMIC_GET_STATUS)
+#define        SMIC_CC_SMM_WR_START    (SMIC_CONTROL|SMIC_SMM|SMIC_WR_START)
+#define        SMIC_CC_SMM_WR_NEXT     (SMIC_CONTROL|SMIC_SMM|SMIC_WR_NEXT)
+#define        SMIC_CC_SMM_WR_END      (SMIC_CONTROL|SMIC_SMM|SMIC_WR_END)
+#define        SMIC_CC_SMM_RD_START    (SMIC_CONTROL|SMIC_SMM|SMIC_RD_START)
+#define        SMIC_CC_SMM_RD_NEXT     (SMIC_CONTROL|SMIC_SMM|SMIC_RD_NEXT)
+#define        SMIC_CC_SMM_RD_END      (SMIC_CONTROL|SMIC_SMM|SMIC_RD_END)
+
+/*  SMIC Status Codes */
+#define        SMIC_SC_SMS_READY       (SMIC_STATUS|SMIC_SMS|SMIC_READY)
+#define        SMIC_SC_SMS_WR_START    (SMIC_STATUS|SMIC_SMS|SMIC_WR_START)
+#define        SMIC_SC_SMS_WR_NEXT     (SMIC_STATUS|SMIC_SMS|SMIC_WR_NEXT)
+#define        SMIC_SC_SMS_WR_END      (SMIC_STATUS|SMIC_SMS|SMIC_WR_END)
+#define        SMIC_SC_SMS_RD_START    (SMIC_STATUS|SMIC_SMS|SMIC_RD_START)
+#define        SMIC_SC_SMS_RD_NEXT     (SMIC_STATUS|SMIC_SMS|SMIC_RD_NEXT)
+#define        SMIC_SC_SMS_RD_END      (SMIC_STATUS|SMIC_SMS|SMIC_RD_END)
+
+#define        SMIC_SC_SMM_READY       (SMIC_STATUS|SMIC_SMM|SMIC_READY)
+#define        SMIC_SC_SMM_WR_START    (SMIC_STATUS|SMIC_SMM|SMIC_WR_START)
+#define        SMIC_SC_SMM_WR_NEXT     (SMIC_STATUS|SMIC_SMM|SMIC_WR_NEXT)
+#define        SMIC_SC_SMM_WR_END      (SMIC_STATUS|SMIC_SMM|SMIC_WR_END)
+#define        SMIC_SC_SMM_RD_START    (SMIC_STATUS|SMIC_SMM|SMIC_RD_START)
+#define        SMIC_SC_SMM_RD_NEXT     (SMIC_STATUS|SMIC_SMM|SMIC_RD_NEXT)
+#define        SMIC_SC_SMM_RD_END      (SMIC_STATUS|SMIC_SMM|SMIC_RD_END)
+
+/* these are the control/status codes we actually use
+       SMIC_CC_SMS_GET_STATUS  0x40
+       SMIC_CC_SMS_WR_START    0x41
+       SMIC_CC_SMS_WR_NEXT     0x42
+       SMIC_CC_SMS_WR_END      0x43
+       SMIC_CC_SMS_RD_START    0x44
+       SMIC_CC_SMS_RD_NEXT     0x45
+       SMIC_CC_SMS_RD_END      0x46
+
+       SMIC_SC_SMS_READY       0xC0
+       SMIC_SC_SMS_WR_START    0xC1
+       SMIC_SC_SMS_WR_NEXT     0xC2
+       SMIC_SC_SMS_WR_END      0xC3
+       SMIC_SC_SMS_RD_START    0xC4
+       SMIC_SC_SMS_RD_NEXT     0xC5
+       SMIC_SC_SMS_RD_END      0xC6
+*/
+
+static enum si_sm_result smic_event(struct si_sm_data *smic, long time)
+{
+       unsigned char status;
+       unsigned char flags;
+       unsigned char data;
+
+       if (smic->state == SMIC_HOSED) {
+               init_smic_data(smic, smic->io);
+               return SI_SM_HOSED;
+       }
+       if (smic->state != SMIC_IDLE) {
+               if (smic_debug & SMIC_DEBUG_STATES)
+                       printk(KERN_DEBUG
+                              "smic_event - smic->smic_timeout = %ld,"
+                              " time = %ld\n",
+                              smic->smic_timeout, time);
+               /*
+                * FIXME: smic_event is sometimes called with time >
+                * SMIC_RETRY_TIMEOUT
+                */
+               if (time < SMIC_RETRY_TIMEOUT) {
+                       smic->smic_timeout -= time;
+                       if (smic->smic_timeout < 0) {
+                               start_error_recovery(smic, "smic timed out.");
+                               return SI_SM_CALL_WITH_DELAY;
+                       }
+               }
+       }
+       flags = read_smic_flags(smic);
+       if (flags & SMIC_FLAG_BSY)
+               return SI_SM_CALL_WITH_DELAY;
+
+       status = read_smic_status(smic);
+       if (smic_debug & SMIC_DEBUG_STATES)
+               printk(KERN_DEBUG
+                      "smic_event - state = %d, flags = 0x%02x,"
+                      " status = 0x%02x\n",
+                      smic->state, flags, status);
+
+       switch (smic->state) {
+       case SMIC_IDLE:
+               /* in IDLE we check for available messages */
+               if (flags & SMIC_SMS_DATA_AVAIL)
+                       return SI_SM_ATTN;
+               return SI_SM_IDLE;
+
+       case SMIC_START_OP:
+               /* sanity check whether smic is really idle */
+               write_smic_control(smic, SMIC_CC_SMS_GET_STATUS);
+               write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+               smic->state = SMIC_OP_OK;
+               break;
+
+       case SMIC_OP_OK:
+               if (status != SMIC_SC_SMS_READY) {
+                       /* this should not happen */
+                       start_error_recovery(smic,
+                                            "state = SMIC_OP_OK,"
+                                            " status != SMIC_SC_SMS_READY");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               /* OK so far; smic is idle let us start ... */
+               write_smic_control(smic, SMIC_CC_SMS_WR_START);
+               write_next_byte(smic);
+               write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+               smic->state = SMIC_WRITE_START;
+               break;
+
+       case SMIC_WRITE_START:
+               if (status != SMIC_SC_SMS_WR_START) {
+                       start_error_recovery(smic,
+                                            "state = SMIC_WRITE_START, "
+                                            "status != SMIC_SC_SMS_WR_START");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               /*
+                * we must not issue WR_(NEXT|END) unless
+                * TX_DATA_READY is set
+                * */
+               if (flags & SMIC_TX_DATA_READY) {
+                       if (smic->write_count == 1) {
+                               /* last byte */
+                               write_smic_control(smic, SMIC_CC_SMS_WR_END);
+                               smic->state = SMIC_WRITE_END;
+                       } else {
+                               write_smic_control(smic, SMIC_CC_SMS_WR_NEXT);
+                               smic->state = SMIC_WRITE_NEXT;
+                       }
+                       write_next_byte(smic);
+                       write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+               } else
+                       return SI_SM_CALL_WITH_DELAY;
+               break;
+
+       case SMIC_WRITE_NEXT:
+               if (status != SMIC_SC_SMS_WR_NEXT) {
+                       start_error_recovery(smic,
+                                            "state = SMIC_WRITE_NEXT, "
+                                            "status != SMIC_SC_SMS_WR_NEXT");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               /* this is the same code as in SMIC_WRITE_START */
+               if (flags & SMIC_TX_DATA_READY) {
+                       if (smic->write_count == 1) {
+                               write_smic_control(smic, SMIC_CC_SMS_WR_END);
+                               smic->state = SMIC_WRITE_END;
+                       } else {
+                               write_smic_control(smic, SMIC_CC_SMS_WR_NEXT);
+                               smic->state = SMIC_WRITE_NEXT;
+                       }
+                       write_next_byte(smic);
+                       write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+               } else
+                       return SI_SM_CALL_WITH_DELAY;
+               break;
+
+       case SMIC_WRITE_END:
+               if (status != SMIC_SC_SMS_WR_END) {
+                       start_error_recovery(smic,
+                                            "state = SMIC_WRITE_END, "
+                                            "status != SMIC_SC_SMS_WR_END");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               /* data register holds an error code */
+               data = read_smic_data(smic);
+               if (data != 0) {
+                       if (smic_debug & SMIC_DEBUG_ENABLE)
+                               printk(KERN_DEBUG
+                                      "SMIC_WRITE_END: data = %02x\n", data);
+                       start_error_recovery(smic,
+                                            "state = SMIC_WRITE_END, "
+                                            "data != SUCCESS");
+                       return SI_SM_CALL_WITH_DELAY;
+               } else
+                       smic->state = SMIC_WRITE2READ;
+               break;
+
+       case SMIC_WRITE2READ:
+               /*
+                * we must wait for RX_DATA_READY to be set before we
+                * can continue
+                */
+               if (flags & SMIC_RX_DATA_READY) {
+                       write_smic_control(smic, SMIC_CC_SMS_RD_START);
+                       write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+                       smic->state = SMIC_READ_START;
+               } else
+                       return SI_SM_CALL_WITH_DELAY;
+               break;
+
+       case SMIC_READ_START:
+               if (status != SMIC_SC_SMS_RD_START) {
+                       start_error_recovery(smic,
+                                            "state = SMIC_READ_START, "
+                                            "status != SMIC_SC_SMS_RD_START");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               if (flags & SMIC_RX_DATA_READY) {
+                       read_next_byte(smic);
+                       write_smic_control(smic, SMIC_CC_SMS_RD_NEXT);
+                       write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+                       smic->state = SMIC_READ_NEXT;
+               } else
+                       return SI_SM_CALL_WITH_DELAY;
+               break;
+
+       case SMIC_READ_NEXT:
+               switch (status) {
+               /*
+                * smic tells us that this is the last byte to be read
+                * --> clean up
+                */
+               case SMIC_SC_SMS_RD_END:
+                       read_next_byte(smic);
+                       write_smic_control(smic, SMIC_CC_SMS_RD_END);
+                       write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+                       smic->state = SMIC_READ_END;
+                       break;
+               case SMIC_SC_SMS_RD_NEXT:
+                       if (flags & SMIC_RX_DATA_READY) {
+                               read_next_byte(smic);
+                               write_smic_control(smic, SMIC_CC_SMS_RD_NEXT);
+                               write_smic_flags(smic, flags | SMIC_FLAG_BSY);
+                               smic->state = SMIC_READ_NEXT;
+                       } else
+                               return SI_SM_CALL_WITH_DELAY;
+                       break;
+               default:
+                       start_error_recovery(
+                               smic,
+                               "state = SMIC_READ_NEXT, "
+                               "status != SMIC_SC_SMS_RD_(NEXT|END)");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               break;
+
+       case SMIC_READ_END:
+               if (status != SMIC_SC_SMS_READY) {
+                       start_error_recovery(smic,
+                                            "state = SMIC_READ_END, "
+                                            "status != SMIC_SC_SMS_READY");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+               data = read_smic_data(smic);
+               /* data register holds an error code */
+               if (data != 0) {
+                       if (smic_debug & SMIC_DEBUG_ENABLE)
+                               printk(KERN_DEBUG
+                                      "SMIC_READ_END: data = %02x\n", data);
+                       start_error_recovery(smic,
+                                            "state = SMIC_READ_END, "
+                                            "data != SUCCESS");
+                       return SI_SM_CALL_WITH_DELAY;
+               } else {
+                       smic->state = SMIC_IDLE;
+                       return SI_SM_TRANSACTION_COMPLETE;
+               }
+
+       case SMIC_HOSED:
+               init_smic_data(smic, smic->io);
+               return SI_SM_HOSED;
+
+       default:
+               if (smic_debug & SMIC_DEBUG_ENABLE) {
+                       printk(KERN_DEBUG "smic->state = %d\n", smic->state);
+                       start_error_recovery(smic, "state = UNKNOWN");
+                       return SI_SM_CALL_WITH_DELAY;
+               }
+       }
+       smic->smic_timeout = SMIC_RETRY_TIMEOUT;
+       return SI_SM_CALL_WITHOUT_DELAY;
+}
+
+static int smic_detect(struct si_sm_data *smic)
+{
+       /*
+        * It's impossible for the SMIC fnags register to be all 1's,
+        * (assuming a properly functioning, self-initialized BMC)
+        * but that's what you get from reading a bogus address, so we
+        * test that first.
+        */
+       if (read_smic_flags(smic) == 0xff)
+               return 1;
+
+       return 0;
+}
+
+static void smic_cleanup(struct si_sm_data *kcs)
+{
+}
+
+static int smic_size(void)
+{
+       return sizeof(struct si_sm_data);
+}
+
+struct si_sm_handlers smic_smi_handlers = {
+       .init_data         = init_smic_data,
+       .start_transaction = start_smic_transaction,
+       .get_result        = smic_get_result,
+       .event             = smic_event,
+       .detect            = smic_detect,
+       .cleanup           = smic_cleanup,
+       .size              = smic_size,
+};