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 */
31 void 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 */
68 int 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
110 struct 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 */
124 int 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
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