pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / misc / ibmasm / module.c
blob4f9d4a9da983ddfaa58c3c2f99b57e5da9119e4e
2 /*
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>
23 * This driver is based on code originally written by Pete Reynolds
24 * and others.
29 * The ASM device driver does the following things:
31 * 1) When loaded it sends a message to the service processor,
32 * indicating that an OS is * running. This causes the service processor
33 * to send periodic heartbeats to the OS.
35 * 2) Answers the periodic heartbeats sent by the service processor.
36 * Failure to do so would result in system reboot.
38 * 3) Acts as a pass through for dot commands sent from user applications.
39 * The interface for this is the ibmasmfs file system.
41 * 4) Allows user applications to register for event notification. Events
42 * are sent to the driver through interrupts. They can be read from user
43 * space through the ibmasmfs file system.
45 * 5) Allows user space applications to send heartbeats to the service
46 * processor (aka reverse heartbeats). Again this happens through ibmasmfs.
48 * 6) Handles remote mouse and keyboard event interrupts and makes them
49 * available to user applications through ibmasmfs.
53 #include <linux/pci.h>
54 #include <linux/init.h>
55 #include "ibmasm.h"
56 #include "lowlevel.h"
57 #include "remote.h"
59 int ibmasm_debug = 0;
60 module_param(ibmasm_debug, int , S_IRUGO | S_IWUSR);
61 MODULE_PARM_DESC(ibmasm_debug, " Set debug mode on or off");
64 static int __devinit ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
66 int result;
67 struct service_processor *sp;
69 if ((result = pci_enable_device(pdev))) {
70 dev_err(&pdev->dev, "Failed to enable PCI device\n");
71 return result;
73 if ((result = pci_request_regions(pdev, DRIVER_NAME))) {
74 dev_err(&pdev->dev, "Failed to allocate PCI resources\n");
75 goto error_resources;
77 /* vnc client won't work without bus-mastering */
78 pci_set_master(pdev);
80 sp = kzalloc(sizeof(struct service_processor), GFP_KERNEL);
81 if (sp == NULL) {
82 dev_err(&pdev->dev, "Failed to allocate memory\n");
83 result = -ENOMEM;
84 goto error_kmalloc;
87 spin_lock_init(&sp->lock);
88 INIT_LIST_HEAD(&sp->command_queue);
90 pci_set_drvdata(pdev, (void *)sp);
91 sp->dev = &pdev->dev;
92 sp->number = pdev->bus->number;
93 snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
94 snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
96 if (ibmasm_event_buffer_init(sp)) {
97 dev_err(sp->dev, "Failed to allocate event buffer\n");
98 goto error_eventbuffer;
101 if (ibmasm_heartbeat_init(sp)) {
102 dev_err(sp->dev, "Failed to allocate heartbeat command\n");
103 goto error_heartbeat;
106 sp->irq = pdev->irq;
107 sp->base_address = ioremap(pci_resource_start(pdev, 0),
108 pci_resource_len(pdev, 0));
109 if (sp->base_address == 0) {
110 dev_err(sp->dev, "Failed to ioremap pci memory\n");
111 result = -ENODEV;
112 goto error_ioremap;
115 result = request_irq(sp->irq, ibmasm_interrupt_handler, IRQF_SHARED, sp->devname, (void*)sp);
116 if (result) {
117 dev_err(sp->dev, "Failed to register interrupt handler\n");
118 goto error_request_irq;
121 enable_sp_interrupts(sp->base_address);
123 result = ibmasm_init_remote_input_dev(sp);
124 if (result) {
125 dev_err(sp->dev, "Failed to initialize remote queue\n");
126 goto error_send_message;
129 result = ibmasm_send_driver_vpd(sp);
130 if (result) {
131 dev_err(sp->dev, "Failed to send driver VPD to service processor\n");
132 goto error_send_message;
134 result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP);
135 if (result) {
136 dev_err(sp->dev, "Failed to send OS state to service processor\n");
137 goto error_send_message;
139 ibmasmfs_add_sp(sp);
141 ibmasm_register_uart(sp);
143 return 0;
145 error_send_message:
146 disable_sp_interrupts(sp->base_address);
147 ibmasm_free_remote_input_dev(sp);
148 free_irq(sp->irq, (void *)sp);
149 error_request_irq:
150 iounmap(sp->base_address);
151 error_ioremap:
152 ibmasm_heartbeat_exit(sp);
153 error_heartbeat:
154 ibmasm_event_buffer_exit(sp);
155 error_eventbuffer:
156 pci_set_drvdata(pdev, NULL);
157 kfree(sp);
158 error_kmalloc:
159 pci_release_regions(pdev);
160 error_resources:
161 pci_disable_device(pdev);
163 return result;
166 static void __devexit ibmasm_remove_one(struct pci_dev *pdev)
168 struct service_processor *sp = (struct service_processor *)pci_get_drvdata(pdev);
170 dbg("Unregistering UART\n");
171 ibmasm_unregister_uart(sp);
172 dbg("Sending OS down message\n");
173 if (ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN))
174 err("failed to get repsonse to 'Send OS State' command\n");
175 dbg("Disabling heartbeats\n");
176 ibmasm_heartbeat_exit(sp);
177 dbg("Disabling interrupts\n");
178 disable_sp_interrupts(sp->base_address);
179 dbg("Freeing SP irq\n");
180 free_irq(sp->irq, (void *)sp);
181 dbg("Cleaning up\n");
182 ibmasm_free_remote_input_dev(sp);
183 iounmap(sp->base_address);
184 ibmasm_event_buffer_exit(sp);
185 pci_set_drvdata(pdev, NULL);
186 kfree(sp);
187 pci_release_regions(pdev);
188 pci_disable_device(pdev);
191 static struct pci_device_id ibmasm_pci_table[] =
193 { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
197 static struct pci_driver ibmasm_driver = {
198 .name = DRIVER_NAME,
199 .id_table = ibmasm_pci_table,
200 .probe = ibmasm_init_one,
201 .remove = __devexit_p(ibmasm_remove_one),
204 static void __exit ibmasm_exit (void)
206 ibmasm_unregister_panic_notifier();
207 ibmasmfs_unregister();
208 pci_unregister_driver(&ibmasm_driver);
209 info(DRIVER_DESC " version " DRIVER_VERSION " unloaded");
212 static int __init ibmasm_init(void)
214 int result;
216 result = ibmasmfs_register();
217 if (result) {
218 err("Failed to register ibmasmfs file system");
219 return result;
221 result = pci_register_driver(&ibmasm_driver);
222 if (result) {
223 ibmasmfs_unregister();
224 return result;
226 ibmasm_register_panic_notifier();
227 info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
228 return 0;
231 module_init(ibmasm_init);
232 module_exit(ibmasm_exit);
234 MODULE_AUTHOR(DRIVER_AUTHOR);
235 MODULE_DESCRIPTION(DRIVER_DESC);
236 MODULE_LICENSE("GPL");
237 MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);