dot_command.c

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/*
 * IBM ASM Service Processor Device Driver
 *
 * 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright (C) IBM Corporation, 2004
 *
 * Author: Max Asböck <amax@us.ibm.com>
 *
 */

#include "ibmasm.h"
#include "dot_command.h"

void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size)
{
    u32 size;
    struct dot_command_header *header = (struct dot_command_header *)message;

    if (message_size == 0)
        return;

    size = get_dot_command_size(message);
    if (size == 0)
        return;

    if (size > message_size)
        size = message_size;

    switch (header->type) {
    case sp_event:
        ibmasm_receive_event(sp, message, size);
        break;
    case sp_command_response:
        ibmasm_receive_command_response(sp, message, size);
        break;
    case sp_heartbeat:
        ibmasm_receive_heartbeat(sp, message, size);
        break;
    default:
        dev_err(sp->dev, "Received unknown message from service processor\n");
    }
}


#define INIT_BUFFER_SIZE 32


int ibmasm_send_driver_vpd(struct service_processor *sp)
{
    struct command *command;
    struct dot_command_header *header;
    u8 *vpd_command;
    u8 *vpd_data;
    int result = 0;

    command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);
    if (command == NULL)
        return -ENOMEM;

    header = (struct dot_command_header *)command->buffer;
    header->type                = sp_write;
    header->command_size        = 4;
    header->data_size           = 16;
    header->status              = 0;
    header->reserved            = 0;

    vpd_command = command->buffer + sizeof(struct dot_command_header);
    vpd_command[0] = 0x4;
    vpd_command[1] = 0x3;
    vpd_command[2] = 0x5;
    vpd_command[3] = 0xa;

    vpd_data = vpd_command + header->command_size;
    vpd_data[0] = 0;
    strcat(vpd_data, IBMASM_DRIVER_VPD);
    vpd_data[10] = 0;
    vpd_data[15] = 0;

    ibmasm_exec_command(sp, command);
    ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL);

    if (command->status != IBMASM_CMD_COMPLETE)
        result = -ENODEV;

    command_put(command);

    return result;
}

struct os_state_command {
    struct dot_command_header   header;
    unsigned char           command[3];
    unsigned char           data;
};

int ibmasm_send_os_state(struct service_processor *sp, int os_state)
{
    struct command *cmd;
    struct os_state_command *os_state_cmd;
    int result = 0;

    cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));
    if (cmd == NULL)
        return -ENOMEM;

    os_state_cmd = (struct os_state_command *)cmd->buffer;
    os_state_cmd->header.type       = sp_write;
    os_state_cmd->header.command_size   = 3;
    os_state_cmd->header.data_size      = 1;
    os_state_cmd->header.status     = 0;
    os_state_cmd->command[0]        = 4;
    os_state_cmd->command[1]        = 3;
    os_state_cmd->command[2]        = 6;
    os_state_cmd->data          = os_state;

    ibmasm_exec_command(sp, cmd);
    ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL);

    if (cmd->status != IBMASM_CMD_COMPLETE)
        result = -ENODEV;

    command_put(cmd);
    return result;
}