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