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-rw-r--r--arch/i386/kernel/mca_32.c470
1 files changed, 0 insertions, 470 deletions
diff --git a/arch/i386/kernel/mca_32.c b/arch/i386/kernel/mca_32.c
deleted file mode 100644
index b83672b89527..000000000000
--- a/arch/i386/kernel/mca_32.c
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1/*
2 * linux/arch/i386/kernel/mca.c
3 * Written by Martin Kolinek, February 1996
4 *
5 * Changes:
6 *
7 * Chris Beauregard July 28th, 1996
8 * - Fixed up integrated SCSI detection
9 *
10 * Chris Beauregard August 3rd, 1996
11 * - Made mca_info local
12 * - Made integrated registers accessible through standard function calls
13 * - Added name field
14 * - More sanity checking
15 *
16 * Chris Beauregard August 9th, 1996
17 * - Rewrote /proc/mca
18 *
19 * Chris Beauregard January 7th, 1997
20 * - Added basic NMI-processing
21 * - Added more information to mca_info structure
22 *
23 * David Weinehall October 12th, 1998
24 * - Made a lot of cleaning up in the source
25 * - Added use of save_flags / restore_flags
26 * - Added the 'driver_loaded' flag in MCA_adapter
27 * - Added an alternative implemention of ZP Gu's mca_find_unused_adapter
28 *
29 * David Weinehall March 24th, 1999
30 * - Fixed the output of 'Driver Installed' in /proc/mca/pos
31 * - Made the Integrated Video & SCSI show up even if they have id 0000
32 *
33 * Alexander Viro November 9th, 1999
34 * - Switched to regular procfs methods
35 *
36 * Alfred Arnold & David Weinehall August 23rd, 2000
37 * - Added support for Planar POS-registers
38 */
39
40#include <linux/module.h>
41#include <linux/types.h>
42#include <linux/errno.h>
43#include <linux/kernel.h>
44#include <linux/mca.h>
45#include <linux/kprobes.h>
46#include <asm/system.h>
47#include <asm/io.h>
48#include <linux/proc_fs.h>
49#include <linux/mman.h>
50#include <linux/mm.h>
51#include <linux/pagemap.h>
52#include <linux/ioport.h>
53#include <asm/uaccess.h>
54#include <linux/init.h>
55#include <asm/arch_hooks.h>
56
57static unsigned char which_scsi = 0;
58
59int MCA_bus = 0;
60EXPORT_SYMBOL(MCA_bus);
61
62/*
63 * Motherboard register spinlock. Untested on SMP at the moment, but
64 * are there any MCA SMP boxes?
65 *
66 * Yes - Alan
67 */
68static DEFINE_SPINLOCK(mca_lock);
69
70/* Build the status info for the adapter */
71
72static void mca_configure_adapter_status(struct mca_device *mca_dev) {
73 mca_dev->status = MCA_ADAPTER_NONE;
74
75 mca_dev->pos_id = mca_dev->pos[0]
76 + (mca_dev->pos[1] << 8);
77
78 if(!mca_dev->pos_id && mca_dev->slot < MCA_MAX_SLOT_NR) {
79
80 /* id = 0x0000 usually indicates hardware failure,
81 * however, ZP Gu (zpg@castle.net> reports that his 9556
82 * has 0x0000 as id and everything still works. There
83 * also seem to be an adapter with id = 0x0000; the
84 * NCR Parallel Bus Memory Card. Until this is confirmed,
85 * however, this code will stay.
86 */
87
88 mca_dev->status = MCA_ADAPTER_ERROR;
89
90 return;
91 } else if(mca_dev->pos_id != 0xffff) {
92
93 /* 0xffff usually indicates that there's no adapter,
94 * however, some integrated adapters may have 0xffff as
95 * their id and still be valid. Examples are on-board
96 * VGA of the 55sx, the integrated SCSI of the 56 & 57,
97 * and possibly also the 95 ULTIMEDIA.
98 */
99
100 mca_dev->status = MCA_ADAPTER_NORMAL;
101 }
102
103 if((mca_dev->pos_id == 0xffff ||
104 mca_dev->pos_id == 0x0000) && mca_dev->slot >= MCA_MAX_SLOT_NR) {
105 int j;
106
107 for(j = 2; j < 8; j++) {
108 if(mca_dev->pos[j] != 0xff) {
109 mca_dev->status = MCA_ADAPTER_NORMAL;
110 break;
111 }
112 }
113 }
114
115 if(!(mca_dev->pos[2] & MCA_ENABLED)) {
116
117 /* enabled bit is in POS 2 */
118
119 mca_dev->status = MCA_ADAPTER_DISABLED;
120 }
121} /* mca_configure_adapter_status */
122
123/*--------------------------------------------------------------------*/
124
125static struct resource mca_standard_resources[] = {
126 { .start = 0x60, .end = 0x60, .name = "system control port B (MCA)" },
127 { .start = 0x90, .end = 0x90, .name = "arbitration (MCA)" },
128 { .start = 0x91, .end = 0x91, .name = "card Select Feedback (MCA)" },
129 { .start = 0x92, .end = 0x92, .name = "system Control port A (MCA)" },
130 { .start = 0x94, .end = 0x94, .name = "system board setup (MCA)" },
131 { .start = 0x96, .end = 0x97, .name = "POS (MCA)" },
132 { .start = 0x100, .end = 0x107, .name = "POS (MCA)" }
133};
134
135#define MCA_STANDARD_RESOURCES ARRAY_SIZE(mca_standard_resources)
136
137/**
138 * mca_read_and_store_pos - read the POS registers into a memory buffer
139 * @pos: a char pointer to 8 bytes, contains the POS register value on
140 * successful return
141 *
142 * Returns 1 if a card actually exists (i.e. the pos isn't
143 * all 0xff) or 0 otherwise
144 */
145static int mca_read_and_store_pos(unsigned char *pos) {
146 int j;
147 int found = 0;
148
149 for(j=0; j<8; j++) {
150 if((pos[j] = inb_p(MCA_POS_REG(j))) != 0xff) {
151 /* 0xff all across means no device. 0x00 means
152 * something's broken, but a device is
153 * probably there. However, if you get 0x00
154 * from a motherboard register it won't matter
155 * what we find. For the record, on the
156 * 57SLC, the integrated SCSI adapter has
157 * 0xffff for the adapter ID, but nonzero for
158 * other registers. */
159
160 found = 1;
161 }
162 }
163 return found;
164}
165
166static unsigned char mca_pc_read_pos(struct mca_device *mca_dev, int reg)
167{
168 unsigned char byte;
169 unsigned long flags;
170
171 if(reg < 0 || reg >= 8)
172 return 0;
173
174 spin_lock_irqsave(&mca_lock, flags);
175 if(mca_dev->pos_register) {
176 /* Disable adapter setup, enable motherboard setup */
177
178 outb_p(0, MCA_ADAPTER_SETUP_REG);
179 outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
180
181 byte = inb_p(MCA_POS_REG(reg));
182 outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
183 } else {
184
185 /* Make sure motherboard setup is off */
186
187 outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
188
189 /* Read the appropriate register */
190
191 outb_p(0x8|(mca_dev->slot & 0xf), MCA_ADAPTER_SETUP_REG);
192 byte = inb_p(MCA_POS_REG(reg));
193 outb_p(0, MCA_ADAPTER_SETUP_REG);
194 }
195 spin_unlock_irqrestore(&mca_lock, flags);
196
197 mca_dev->pos[reg] = byte;
198
199 return byte;
200}
201
202static void mca_pc_write_pos(struct mca_device *mca_dev, int reg,
203 unsigned char byte)
204{
205 unsigned long flags;
206
207 if(reg < 0 || reg >= 8)
208 return;
209
210 spin_lock_irqsave(&mca_lock, flags);
211
212 /* Make sure motherboard setup is off */
213
214 outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
215
216 /* Read in the appropriate register */
217
218 outb_p(0x8|(mca_dev->slot&0xf), MCA_ADAPTER_SETUP_REG);
219 outb_p(byte, MCA_POS_REG(reg));
220 outb_p(0, MCA_ADAPTER_SETUP_REG);
221
222 spin_unlock_irqrestore(&mca_lock, flags);
223
224 /* Update the global register list, while we have the byte */
225
226 mca_dev->pos[reg] = byte;
227
228}
229
230/* for the primary MCA bus, we have identity transforms */
231static int mca_dummy_transform_irq(struct mca_device * mca_dev, int irq)
232{
233 return irq;
234}
235
236static int mca_dummy_transform_ioport(struct mca_device * mca_dev, int port)
237{
238 return port;
239}
240
241static void *mca_dummy_transform_memory(struct mca_device * mca_dev, void *mem)
242{
243 return mem;
244}
245
246
247static int __init mca_init(void)
248{
249 unsigned int i, j;
250 struct mca_device *mca_dev;
251 unsigned char pos[8];
252 short mca_builtin_scsi_ports[] = {0xf7, 0xfd, 0x00};
253 struct mca_bus *bus;
254
255 /* WARNING: Be careful when making changes here. Putting an adapter
256 * and the motherboard simultaneously into setup mode may result in
257 * damage to chips (according to The Indispensible PC Hardware Book
258 * by Hans-Peter Messmer). Also, we disable system interrupts (so
259 * that we are not disturbed in the middle of this).
260 */
261
262 /* Make sure the MCA bus is present */
263
264 if (mca_system_init()) {
265 printk(KERN_ERR "MCA bus system initialisation failed\n");
266 return -ENODEV;
267 }
268
269 if (!MCA_bus)
270 return -ENODEV;
271
272 printk(KERN_INFO "Micro Channel bus detected.\n");
273
274 /* All MCA systems have at least a primary bus */
275 bus = mca_attach_bus(MCA_PRIMARY_BUS);
276 if (!bus)
277 goto out_nomem;
278 bus->default_dma_mask = 0xffffffffLL;
279 bus->f.mca_write_pos = mca_pc_write_pos;
280 bus->f.mca_read_pos = mca_pc_read_pos;
281 bus->f.mca_transform_irq = mca_dummy_transform_irq;
282 bus->f.mca_transform_ioport = mca_dummy_transform_ioport;
283 bus->f.mca_transform_memory = mca_dummy_transform_memory;
284
285 /* get the motherboard device */
286 mca_dev = kzalloc(sizeof(struct mca_device), GFP_KERNEL);
287 if(unlikely(!mca_dev))
288 goto out_nomem;
289
290 /*
291 * We do not expect many MCA interrupts during initialization,
292 * but let us be safe:
293 */
294 spin_lock_irq(&mca_lock);
295
296 /* Make sure adapter setup is off */
297
298 outb_p(0, MCA_ADAPTER_SETUP_REG);
299
300 /* Read motherboard POS registers */
301
302 mca_dev->pos_register = 0x7f;
303 outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
304 mca_dev->name[0] = 0;
305 mca_read_and_store_pos(mca_dev->pos);
306 mca_configure_adapter_status(mca_dev);
307 /* fake POS and slot for a motherboard */
308 mca_dev->pos_id = MCA_MOTHERBOARD_POS;
309 mca_dev->slot = MCA_MOTHERBOARD;
310 mca_register_device(MCA_PRIMARY_BUS, mca_dev);
311
312 mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
313 if(unlikely(!mca_dev))
314 goto out_unlock_nomem;
315
316 /* Put motherboard into video setup mode, read integrated video
317 * POS registers, and turn motherboard setup off.
318 */
319
320 mca_dev->pos_register = 0xdf;
321 outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
322 mca_dev->name[0] = 0;
323 mca_read_and_store_pos(mca_dev->pos);
324 mca_configure_adapter_status(mca_dev);
325 /* fake POS and slot for the integrated video */
326 mca_dev->pos_id = MCA_INTEGVIDEO_POS;
327 mca_dev->slot = MCA_INTEGVIDEO;
328 mca_register_device(MCA_PRIMARY_BUS, mca_dev);
329
330 /* Put motherboard into scsi setup mode, read integrated scsi
331 * POS registers, and turn motherboard setup off.
332 *
333 * It seems there are two possible SCSI registers. Martin says that
334 * for the 56,57, 0xf7 is the one, but fails on the 76.
335 * Alfredo (apena@vnet.ibm.com) says
336 * 0xfd works on his machine. We'll try both of them. I figure it's
337 * a good bet that only one could be valid at a time. This could
338 * screw up though if one is used for something else on the other
339 * machine.
340 */
341
342 for(i = 0; (which_scsi = mca_builtin_scsi_ports[i]) != 0; i++) {
343 outb_p(which_scsi, MCA_MOTHERBOARD_SETUP_REG);
344 if(mca_read_and_store_pos(pos))
345 break;
346 }
347 if(which_scsi) {
348 /* found a scsi card */
349 mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
350 if(unlikely(!mca_dev))
351 goto out_unlock_nomem;
352
353 for(j = 0; j < 8; j++)
354 mca_dev->pos[j] = pos[j];
355
356 mca_configure_adapter_status(mca_dev);
357 /* fake POS and slot for integrated SCSI controller */
358 mca_dev->pos_id = MCA_INTEGSCSI_POS;
359 mca_dev->slot = MCA_INTEGSCSI;
360 mca_dev->pos_register = which_scsi;
361 mca_register_device(MCA_PRIMARY_BUS, mca_dev);
362 }
363
364 /* Turn off motherboard setup */
365
366 outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
367
368 /* Now loop over MCA slots: put each adapter into setup mode, and
369 * read its POS registers. Then put adapter setup off.
370 */
371
372 for(i=0; i<MCA_MAX_SLOT_NR; i++) {
373 outb_p(0x8|(i&0xf), MCA_ADAPTER_SETUP_REG);
374 if(!mca_read_and_store_pos(pos))
375 continue;
376
377 mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
378 if(unlikely(!mca_dev))
379 goto out_unlock_nomem;
380
381 for(j=0; j<8; j++)
382 mca_dev->pos[j]=pos[j];
383
384 mca_dev->driver_loaded = 0;
385 mca_dev->slot = i;
386 mca_dev->pos_register = 0;
387 mca_configure_adapter_status(mca_dev);
388 mca_register_device(MCA_PRIMARY_BUS, mca_dev);
389 }
390 outb_p(0, MCA_ADAPTER_SETUP_REG);
391
392 /* Enable interrupts and return memory start */
393 spin_unlock_irq(&mca_lock);
394
395 for (i = 0; i < MCA_STANDARD_RESOURCES; i++)
396 request_resource(&ioport_resource, mca_standard_resources + i);
397
398 mca_do_proc_init();
399
400 return 0;
401
402 out_unlock_nomem:
403 spin_unlock_irq(&mca_lock);
404 out_nomem:
405 printk(KERN_EMERG "Failed memory allocation in MCA setup!\n");
406 return -ENOMEM;
407}
408
409subsys_initcall(mca_init);
410
411/*--------------------------------------------------------------------*/
412
413static __kprobes void
414mca_handle_nmi_device(struct mca_device *mca_dev, int check_flag)
415{
416 int slot = mca_dev->slot;
417
418 if(slot == MCA_INTEGSCSI) {
419 printk(KERN_CRIT "NMI: caused by MCA integrated SCSI adapter (%s)\n",
420 mca_dev->name);
421 } else if(slot == MCA_INTEGVIDEO) {
422 printk(KERN_CRIT "NMI: caused by MCA integrated video adapter (%s)\n",
423 mca_dev->name);
424 } else if(slot == MCA_MOTHERBOARD) {
425 printk(KERN_CRIT "NMI: caused by motherboard (%s)\n",
426 mca_dev->name);
427 }
428
429 /* More info available in POS 6 and 7? */
430
431 if(check_flag) {
432 unsigned char pos6, pos7;
433
434 pos6 = mca_device_read_pos(mca_dev, 6);
435 pos7 = mca_device_read_pos(mca_dev, 7);
436
437 printk(KERN_CRIT "NMI: POS 6 = 0x%x, POS 7 = 0x%x\n", pos6, pos7);
438 }
439
440} /* mca_handle_nmi_slot */
441
442/*--------------------------------------------------------------------*/
443
444static int __kprobes mca_handle_nmi_callback(struct device *dev, void *data)
445{
446 struct mca_device *mca_dev = to_mca_device(dev);
447 unsigned char pos5;
448
449 pos5 = mca_device_read_pos(mca_dev, 5);
450
451 if(!(pos5 & 0x80)) {
452 /* Bit 7 of POS 5 is reset when this adapter has a hardware
453 * error. Bit 7 it reset if there's error information
454 * available in POS 6 and 7.
455 */
456 mca_handle_nmi_device(mca_dev, !(pos5 & 0x40));
457 return 1;
458 }
459 return 0;
460}
461
462void __kprobes mca_handle_nmi(void)
463{
464 /* First try - scan the various adapters and see if a specific
465 * adapter was responsible for the error.
466 */
467 bus_for_each_dev(&mca_bus_type, NULL, NULL, mca_handle_nmi_callback);
468
469 mca_nmi_hook();
470} /* mca_handle_nmi */
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