1 /* -*- mode: c; c-basic-offset: 8 -*- */
2
3 /*
4 * MCA bus support functions for the proc fs.
5 *
6 * NOTE: this code *requires* the legacy MCA api.
7 *
8 * Legacy API means the API that operates in terms of MCA slot number
9 *
10 * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com>
11 *
12 **-----------------------------------------------------------------------------
13 **
14 ** This program is free software; you can redistribute it and/or modify
15 ** it under the terms of the GNU General Public License as published by
16 ** the Free Software Foundation; either version 2 of the License, or
17 ** (at your option) any later version.
18 **
19 ** This program is distributed in the hope that it will be useful,
20 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ** GNU General Public License for more details.
23 **
24 ** You should have received a copy of the GNU General Public License
25 ** along with this program; if not, write to the Free Software
26 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 **
28 **-----------------------------------------------------------------------------
29 */
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/proc_fs.h>
33 #include <linux/mca.h>
34
35 static int get_mca_info_helper(struct mca_device *mca_dev, char *page, int len)
36 {
37 int j;
38
39 for(j=0; j<8; j++)
40 len += sprintf(page+len, "%02x ",
41 mca_dev ? mca_dev->pos[j] : 0xff);
42 len += sprintf(page+len, " %s\n", mca_dev ? mca_dev->name : "");
43 return len;
44 }
45
46 static int get_mca_info(char *page, char **start, off_t off,
47 int count, int *eof, void *data)
48 {
49 int i, len = 0;
50
51 if(MCA_bus) {
52 struct mca_device *mca_dev;
53 /* Format POS registers of eight MCA slots */
54
55 for(i=0; i<MCA_MAX_SLOT_NR; i++) {
56 mca_dev = mca_find_device_by_slot(i);
57
58 len += sprintf(page+len, "Slot %d: ", i+1);
59 len = get_mca_info_helper(mca_dev, page, len);
60 }
61
62 /* Format POS registers of integrated video subsystem */
63
64 mca_dev = mca_find_device_by_slot(MCA_INTEGVIDEO);
65 len += sprintf(page+len, "Video : ");
66 len = get_mca_info_helper(mca_dev, page, len);
67
68 /* Format POS registers of integrated SCSI subsystem */
69
70 mca_dev = mca_find_device_by_slot(MCA_INTEGSCSI);
71 len += sprintf(page+len, "SCSI : ");
72 len = get_mca_info_helper(mca_dev, page, len);
73
74 /* Format POS registers of motherboard */
75
76 mca_dev = mca_find_device_by_slot(MCA_MOTHERBOARD);
77 len += sprintf(page+len, "Planar: ");
78 len = get_mca_info_helper(mca_dev, page, len);
79 } else {
80 /* Leave it empty if MCA not detected - this should *never*
81 * happen!
82 */
83 }
84
85 if (len <= off+count) *eof = 1;
86 *start = page + off;
87 len -= off;
88 if (len>count) len = count;
89 if (len<0) len = 0;
90 return len;
91 }
92
93 /*--------------------------------------------------------------------*/
94
95 static int mca_default_procfn(char* buf, struct mca_device *mca_dev)
96 {
97 int len = 0, i;
98 int slot = mca_dev->slot;
99
100 /* Print out the basic information */
101
102 if(slot < MCA_MAX_SLOT_NR) {
103 len += sprintf(buf+len, "Slot: %d\n", slot+1);
104 } else if(slot == MCA_INTEGSCSI) {
105 len += sprintf(buf+len, "Integrated SCSI Adapter\n");
106 } else if(slot == MCA_INTEGVIDEO) {
107 len += sprintf(buf+len, "Integrated Video Adapter\n");
108 } else if(slot == MCA_MOTHERBOARD) {
109 len += sprintf(buf+len, "Motherboard\n");
110 }
111 if (mca_dev->name[0]) {
112
113 /* Drivers might register a name without /proc handler... */
114
115 len += sprintf(buf+len, "Adapter Name: %s\n",
116 mca_dev->name);
117 } else {
118 len += sprintf(buf+len, "Adapter Name: Unknown\n");
119 }
120 len += sprintf(buf+len, "Id: %02x%02x\n",
121 mca_dev->pos[1], mca_dev->pos[0]);
122 len += sprintf(buf+len, "Enabled: %s\nPOS: ",
123 mca_device_status(mca_dev) == MCA_ADAPTER_NORMAL ?
124 "Yes" : "No");
125 for(i=0; i<8; i++) {
126 len += sprintf(buf+len, "%02x ", mca_dev->pos[i]);
127 }
128 len += sprintf(buf+len, "\nDriver Installed: %s",
129 mca_device_claimed(mca_dev) ? "Yes" : "No");
130 buf[len++] = '\n';
131 buf[len] = 0;
132
133 return len;
134 } /* mca_default_procfn() */
135
136 static int get_mca_machine_info(char* page, char **start, off_t off,
137 int count, int *eof, void *data)
138 {
139 int len = 0;
140
141 len += sprintf(page+len, "Model Id: 0x%x\n", machine_id);
142 len += sprintf(page+len, "Submodel Id: 0x%x\n", machine_submodel_id);
143 len += sprintf(page+len, "BIOS Revision: 0x%x\n", BIOS_revision);
144
145 if (len <= off+count) *eof = 1;
146 *start = page + off;
147 len -= off;
148 if (len>count) len = count;
149 if (len<0) len = 0;
150 return len;
151 }
152
153 static int mca_read_proc(char *page, char **start, off_t off,
154 int count, int *eof, void *data)
155 {
156 struct mca_device *mca_dev = (struct mca_device *)data;
157 int len = 0;
158
159 /* Get the standard info */
160
161 len = mca_default_procfn(page, mca_dev);
162
163 /* Do any device-specific processing, if there is any */
164
165 if(mca_dev->procfn) {
166 len += mca_dev->procfn(page+len, mca_dev->slot,
167 mca_dev->proc_dev);
168 }
169 if (len <= off+count) *eof = 1;
170 *start = page + off;
171 len -= off;
172 if (len>count) len = count;
173 if (len<0) len = 0;
174 return len;
175 } /* mca_read_proc() */
176
177 /*--------------------------------------------------------------------*/
178
179 void __init mca_do_proc_init(void)
180 {
181 int i;
182 struct proc_dir_entry *proc_mca;
183 struct proc_dir_entry* node = NULL;
184 struct mca_device *mca_dev;
185
186 proc_mca = proc_mkdir("mca", NULL);
187 create_proc_read_entry("pos",0,proc_mca,get_mca_info,NULL);
188 create_proc_read_entry("machine",0,proc_mca,get_mca_machine_info,NULL);
189
190 /* Initialize /proc/mca entries for existing adapters */
191
192 for(i = 0; i < MCA_NUMADAPTERS; i++) {
193 enum MCA_AdapterStatus status;
194 mca_dev = mca_find_device_by_slot(i);
195 if(!mca_dev)
196 continue;
197
198 mca_dev->procfn = NULL;
199
200 if(i < MCA_MAX_SLOT_NR) sprintf(mca_dev->procname,"slot%d", i+1);
201 else if(i == MCA_INTEGVIDEO) sprintf(mca_dev->procname,"video");
202 else if(i == MCA_INTEGSCSI) sprintf(mca_dev->procname,"scsi");
203 else if(i == MCA_MOTHERBOARD) sprintf(mca_dev->procname,"planar");
204
205 status = mca_device_status(mca_dev);
206 if (status != MCA_ADAPTER_NORMAL &&
207 status != MCA_ADAPTER_DISABLED)
208 continue;
209
210 node = create_proc_read_entry(mca_dev->procname, 0, proc_mca,
211 mca_read_proc, (void *)mca_dev);
212
213 if(node == NULL) {
214 printk("Failed to allocate memory for MCA proc-entries!");
215 return;
216 }
217 }
218
219 } /* mca_do_proc_init() */
220
221 /**
222 * mca_set_adapter_procfn - Set the /proc callback
223 * @slot: slot to configure
224 * @procfn: callback function to call for /proc
225 * @dev: device information passed to the callback
226 *
227 * This sets up an information callback for /proc/mca/slot?. The
228 * function is called with the buffer, slot, and device pointer (or
229 * some equally informative context information, or nothing, if you
230 * prefer), and is expected to put useful information into the
231 * buffer. The adapter name, ID, and POS registers get printed
232 * before this is called though, so don't do it again.
233 *
234 * This should be called with a %NULL @procfn when a module
235 * unregisters, thus preventing kernel crashes and other such
236 * nastiness.
237 */
238
239 void mca_set_adapter_procfn(int slot, MCA_ProcFn procfn, void* proc_dev)
240 {
241 struct mca_device *mca_dev = mca_find_device_by_slot(slot);
242
243 if(!mca_dev)
244 return;
245
246 mca_dev->procfn = procfn;
247 mca_dev->proc_dev = proc_dev;
248 }
249 EXPORT_SYMBOL(mca_set_adapter_procfn);
250
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