/*
   * 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"
  
  /**
   * Dispatch an incoming message to the specific handler for the message.
   * Called from interrupt context.
   */
  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
  ");
  	}
  }
  
  
  #define INIT_BUFFER_SIZE 32
  
  
  /**
   * send the 4.3.5.10 dot command (driver VPD) to the service processor
   */
  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;
  };
  
  /**
   * send the 4.3.6 dot command (os state) to the service processor
   * During driver init this function is called with os state "up".
   * This causes the service processor to start sending heartbeats the
   * driver.

   * During driver exit the function is called with os state "down",

   * causing the service processor to stop the heartbeats.
   */
  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;
  }