1/*
2 * IBM ASM Service Processor Device Driver
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * Copyright (C) IBM Corporation, 2004
19 *
20 * Author: Max Asböck <amax@us.ibm.com>
21 *
22 */
23
24#include "ibmasm.h"
25#include "dot_command.h"
26
27/**
28 * Dispatch an incoming message to the specific handler for the message.
29 * Called from interrupt context.
30 */
31void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size)
32{
33	u32 size;
34	struct dot_command_header *header = (struct dot_command_header *)message;
35
36	if (message_size == 0)
37		return;
38
39	size = get_dot_command_size(message);
40	if (size == 0)
41		return;
42
43	if (size > message_size)
44		size = message_size;
45
46	switch (header->type) {
47	case sp_event:
48		ibmasm_receive_event(sp, message, size);
49		break;
50	case sp_command_response:
51		ibmasm_receive_command_response(sp, message, size);
52		break;
53	case sp_heartbeat:
54		ibmasm_receive_heartbeat(sp, message, size);
55		break;
56	default:
57		dev_err(sp->dev, "Received unknown message from service processor\n");
58	}
59}
60
61
62#define INIT_BUFFER_SIZE 32
63
64
65/**
66 * send the 4.3.5.10 dot command (driver VPD) to the service processor
67 */
68int ibmasm_send_driver_vpd(struct service_processor *sp)
69{
70	struct command *command;
71	struct dot_command_header *header;
72	u8 *vpd_command;
73	u8 *vpd_data;
74	int result = 0;
75
76	command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);
77	if (command == NULL)
78		return -ENOMEM;
79
80	header = (struct dot_command_header *)command->buffer;
81	header->type                = sp_write;
82	header->command_size        = 4;
83	header->data_size           = 16;
84	header->status              = 0;
85	header->reserved            = 0;
86
87	vpd_command = command->buffer + sizeof(struct dot_command_header);
88	vpd_command[0] = 0x4;
89	vpd_command[1] = 0x3;
90	vpd_command[2] = 0x5;
91	vpd_command[3] = 0xa;
92
93	vpd_data = vpd_command + header->command_size;
94	vpd_data[0] = 0;
95	strcat(vpd_data, IBMASM_DRIVER_VPD);
96	vpd_data[10] = 0;
97	vpd_data[15] = 0;
98
99	ibmasm_exec_command(sp, command);
100	ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL);
101
102	if (command->status != IBMASM_CMD_COMPLETE)
103		result = -ENODEV;
104
105	command_put(command);
106
107	return result;
108}
109
110struct os_state_command {
111	struct dot_command_header	header;
112	unsigned char			command[3];
113	unsigned char			data;
114};
115
116/**
117 * send the 4.3.6 dot command (os state) to the service processor
118 * During driver init this function is called with os state "up".
119 * This causes the service processor to start sending heartbeats the
120 * driver.
121 * During driver exit the function is called with os state "down",
122 * causing the service processor to stop the heartbeats.
123 */
124int ibmasm_send_os_state(struct service_processor *sp, int os_state)
125{
126	struct command *cmd;
127	struct os_state_command *os_state_cmd;
128	int result = 0;
129
130	cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));
131	if (cmd == NULL)
132		return -ENOMEM;
133
134	os_state_cmd = (struct os_state_command *)cmd->buffer;
135	os_state_cmd->header.type		= sp_write;
136	os_state_cmd->header.command_size	= 3;
137	os_state_cmd->header.data_size		= 1;
138	os_state_cmd->header.status		= 0;
139	os_state_cmd->command[0]		= 4;
140	os_state_cmd->command[1]		= 3;
141	os_state_cmd->command[2]		= 6;
142	os_state_cmd->data			= os_state;
143
144	ibmasm_exec_command(sp, cmd);
145	ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL);
146
147	if (cmd->status != IBMASM_CMD_COMPLETE)
148		result = -ENODEV;
149
150	command_put(cmd);
151	return result;
152}
153