3 * IBM ASM Service Processor Device Driver
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 * Copyright (C) IBM Corporation, 2004
21 * Author: Max Asböck <amax@us.ibm.com>
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/errno.h>
28 #include <linux/list.h>
29 #include <linux/wait.h>
30 #include <linux/spinlock.h>
31 #include <linux/slab.h>
32 #include <linux/config.h>
33 #include <linux/module.h>
34 #include <linux/version.h>
35 #include <linux/interrupt.h>
36 #include <linux/device.h>
37 #include <linux/input.h>
39 /* Driver identification */
40 #define DRIVER_NAME "ibmasm"
41 #define DRIVER_VERSION "1.0"
42 #define DRIVER_AUTHOR "Max Asbock <masbock@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
43 #define DRIVER_DESC "IBM ASM Service Processor Driver"
45 #define err(msg) printk(KERN_ERR "%s: " msg "\n", DRIVER_NAME)
46 #define info(msg) printk(KERN_INFO "%s: " msg "\n", DRIVER_NAME)
48 extern int ibmasm_debug;
49 #define dbg(STR, ARGS...) \
52 printk(KERN_DEBUG STR , ##ARGS); \
55 static inline char *get_timestamp(char *buf)
58 do_gettimeofday(&now);
59 sprintf(buf, "%lu.%lu", now.tv_sec, now.tv_usec);
63 #define IBMASM_CMD_PENDING 0
64 #define IBMASM_CMD_COMPLETE 1
65 #define IBMASM_CMD_FAILED 2
67 #define IBMASM_CMD_TIMEOUT_NORMAL 45
68 #define IBMASM_CMD_TIMEOUT_EXTRA 240
70 #define IBMASM_CMD_MAX_BUFFER_SIZE 0x8000
72 #define REVERSE_HEARTBEAT_TIMEOUT 120
74 #define HEARTBEAT_BUFFER_SIZE 0x400
77 #define IBMASM_DRIVER_VPD "Lin64 6.08 "
79 #define IBMASM_DRIVER_VPD "Lin32 6.08 "
82 #define SYSTEM_STATE_OS_UP 5
83 #define SYSTEM_STATE_OS_DOWN 4
85 #define IBMASM_NAME_SIZE 16
87 #define IBMASM_NUM_EVENTS 10
88 #define IBMASM_EVENT_MAX_SIZE 2048u
92 struct list_head queue_node;
93 wait_queue_head_t wait;
94 unsigned char *buffer;
100 #define to_command(c) container_of(c, struct command, kobj)
102 static inline void command_put(struct command *cmd)
106 spin_lock_irqsave(cmd->lock, flags);
107 kobject_put(&cmd->kobj);
108 spin_unlock_irqrestore(cmd->lock, flags);
111 static inline void command_get(struct command *cmd)
113 kobject_get(&cmd->kobj);
117 struct ibmasm_event {
118 unsigned int serial_number;
119 unsigned int data_size;
120 unsigned char data[IBMASM_EVENT_MAX_SIZE];
123 struct event_buffer {
124 struct ibmasm_event events[IBMASM_NUM_EVENTS];
125 unsigned int next_serial_number;
126 unsigned int next_index;
127 struct list_head readers;
130 struct event_reader {
132 unsigned int next_serial_number;
133 wait_queue_head_t wait;
134 struct list_head node;
135 unsigned int data_size;
136 unsigned char data[IBMASM_EVENT_MAX_SIZE];
139 struct reverse_heartbeat {
140 wait_queue_head_t wait;
141 unsigned int stopped;
144 struct ibmasm_remote {
145 struct input_dev keybd_dev;
146 struct input_dev mouse_dev;
149 struct service_processor {
150 struct list_head node;
152 void __iomem *base_address;
154 struct command *current_command;
155 struct command *heartbeat;
156 struct list_head command_queue;
157 struct event_buffer *event_buffer;
158 char dirname[IBMASM_NAME_SIZE];
159 char devname[IBMASM_NAME_SIZE];
161 struct ibmasm_remote *remote;
166 /* command processing */
167 extern struct command *ibmasm_new_command(struct service_processor *sp, size_t buffer_size);
168 extern void ibmasm_exec_command(struct service_processor *sp, struct command *cmd);
169 extern void ibmasm_wait_for_response(struct command *cmd, int timeout);
170 extern void ibmasm_receive_command_response(struct service_processor *sp, void *response, size_t size);
172 /* event processing */
173 extern int ibmasm_event_buffer_init(struct service_processor *sp);
174 extern void ibmasm_event_buffer_exit(struct service_processor *sp);
175 extern void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size);
176 extern void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader);
177 extern void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader);
178 extern int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader);
179 extern void ibmasm_cancel_next_event(struct event_reader *reader);
181 /* heartbeat - from SP to OS */
182 extern void ibmasm_register_panic_notifier(void);
183 extern void ibmasm_unregister_panic_notifier(void);
184 extern int ibmasm_heartbeat_init(struct service_processor *sp);
185 extern void ibmasm_heartbeat_exit(struct service_processor *sp);
186 extern void ibmasm_receive_heartbeat(struct service_processor *sp, void *message, size_t size);
188 /* reverse heartbeat - from OS to SP */
189 extern void ibmasm_init_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
190 extern int ibmasm_start_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
191 extern void ibmasm_stop_reverse_heartbeat(struct reverse_heartbeat *rhb);
194 extern void ibmasm_receive_message(struct service_processor *sp, void *data, int data_size);
195 extern int ibmasm_send_driver_vpd(struct service_processor *sp);
196 extern int ibmasm_send_os_state(struct service_processor *sp, int os_state);
198 /* low level message processing */
199 extern int ibmasm_send_i2o_message(struct service_processor *sp);
200 extern irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id, struct pt_regs *regs);
203 extern void ibmasm_handle_mouse_interrupt(struct service_processor *sp, struct pt_regs *regs);
204 extern int ibmasm_init_remote_input_dev(struct service_processor *sp);
205 extern void ibmasm_free_remote_input_dev(struct service_processor *sp);
208 extern int ibmasmfs_register(void);
209 extern void ibmasmfs_unregister(void);
210 extern void ibmasmfs_add_sp(struct service_processor *sp);
213 #ifdef CONFIG_SERIAL_8250
214 extern void ibmasm_register_uart(struct service_processor *sp);
215 extern void ibmasm_unregister_uart(struct service_processor *sp);
217 #define ibmasm_register_uart(sp) do { } while(0)
218 #define ibmasm_unregister_uart(sp) do { } while(0)