1/* Simple code to turn various tables in an ELF file into alias definitions.
2 * This deals with kernel datastructures where they should be
3 * dealt with: in the kernel source.
4 *
5 * Copyright 2002-2003  Rusty Russell, IBM Corporation
6 *           2003       Kai Germaschewski
7 *
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 */
12
13#include "modpost.h"
14#include "devicetable-offsets.h"
15
16/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
17 * use either stdint.h or inttypes.h for the rest. */
18#if KERNEL_ELFCLASS == ELFCLASS32
19typedef Elf32_Addr	kernel_ulong_t;
20#define BITS_PER_LONG 32
21#else
22typedef Elf64_Addr	kernel_ulong_t;
23#define BITS_PER_LONG 64
24#endif
25#ifdef __sun__
26#include <inttypes.h>
27#else
28#include <stdint.h>
29#endif
30
31#include <ctype.h>
32#include <stdbool.h>
33
34typedef uint32_t	__u32;
35typedef uint16_t	__u16;
36typedef unsigned char	__u8;
37
38/* Big exception to the "don't include kernel headers into userspace, which
39 * even potentially has different endianness and word sizes, since
40 * we handle those differences explicitly below */
41#include "../../include/linux/mod_devicetable.h"
42
43/* This array collects all instances that use the generic do_table */
44struct devtable {
45	const char *device_id; /* name of table, __mod_<name>__*_device_table. */
46	unsigned long id_size;
47	void *function;
48};
49
50#define ___cat(a,b) a ## b
51#define __cat(a,b) ___cat(a,b)
52
53/* we need some special handling for this host tool running eventually on
54 * Darwin. The Mach-O section handling is a bit different than ELF section
55 * handling. The differnces in detail are:
56 *  a) we have segments which have sections
57 *  b) we need a API call to get the respective section symbols */
58#if defined(__MACH__)
59#include <mach-o/getsect.h>
60
61#define INIT_SECTION(name)  do {					\
62		unsigned long name ## _len;				\
63		char *__cat(pstart_,name) = getsectdata("__TEXT",	\
64			#name, &__cat(name,_len));			\
65		char *__cat(pstop_,name) = __cat(pstart_,name) +	\
66			__cat(name, _len);				\
67		__cat(__start_,name) = (void *)__cat(pstart_,name);	\
68		__cat(__stop_,name) = (void *)__cat(pstop_,name);	\
69	} while (0)
70#define SECTION(name)   __attribute__((section("__TEXT, " #name)))
71
72struct devtable **__start___devtable, **__stop___devtable;
73#else
74#define INIT_SECTION(name) /* no-op for ELF */
75#define SECTION(name)   __attribute__((section(#name)))
76
77/* We construct a table of pointers in an ELF section (pointers generally
78 * go unpadded by gcc).  ld creates boundary syms for us. */
79extern struct devtable *__start___devtable[], *__stop___devtable[];
80#endif /* __MACH__ */
81
82#if !defined(__used)
83# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
84#  define __used			__attribute__((__unused__))
85# else
86#  define __used			__attribute__((__used__))
87# endif
88#endif
89
90/* Define a variable f that holds the value of field f of struct devid
91 * based at address m.
92 */
93#define DEF_FIELD(m, devid, f) \
94	typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
95/* Define a variable f that holds the address of field f of struct devid
96 * based at address m.  Due to the way typeof works, for a field of type
97 * T[N] the variable has type T(*)[N], _not_ T*.
98 */
99#define DEF_FIELD_ADDR(m, devid, f) \
100	typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
101
102/* Add a table entry.  We test function type matches while we're here. */
103#define ADD_TO_DEVTABLE(device_id, type, function) \
104	static struct devtable __cat(devtable,__LINE__) = {	\
105		device_id + 0*sizeof((function)((const char *)NULL,	\
106						(void *)NULL,		\
107						(char *)NULL)),		\
108		SIZE_##type, (function) };				\
109	static struct devtable *SECTION(__devtable) __used \
110		__cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
111
112#define ADD(str, sep, cond, field)                              \
113do {                                                            \
114        strcat(str, sep);                                       \
115        if (cond)                                               \
116                sprintf(str + strlen(str),                      \
117                        sizeof(field) == 1 ? "%02X" :           \
118                        sizeof(field) == 2 ? "%04X" :           \
119                        sizeof(field) == 4 ? "%08X" : "",       \
120                        field);                                 \
121        else                                                    \
122                sprintf(str + strlen(str), "*");                \
123} while(0)
124
125/* Always end in a wildcard, for future extension */
126static inline void add_wildcard(char *str)
127{
128	int len = strlen(str);
129
130	if (str[len - 1] != '*')
131		strcat(str + len, "*");
132}
133
134/**
135 * Check that sizeof(device_id type) are consistent with size of section
136 * in .o file. If in-consistent then userspace and kernel does not agree
137 * on actual size which is a bug.
138 * Also verify that the final entry in the table is all zeros.
139 * Ignore both checks if build host differ from target host and size differs.
140 **/
141static void device_id_check(const char *modname, const char *device_id,
142			    unsigned long size, unsigned long id_size,
143			    void *symval)
144{
145	int i;
146
147	if (size % id_size || size < id_size) {
148		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
149		      "of the size of "
150		      "section __mod_%s__<identifier>_device_table=%lu.\n"
151		      "Fix definition of struct %s_device_id "
152		      "in mod_devicetable.h\n",
153		      modname, device_id, id_size, device_id, size, device_id);
154	}
155	/* Verify last one is a terminator */
156	for (i = 0; i < id_size; i++ ) {
157		if (*(uint8_t*)(symval+size-id_size+i)) {
158			fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
159				"The last of %lu is:\n",
160				modname, device_id, id_size, size / id_size);
161			for (i = 0; i < id_size; i++ )
162				fprintf(stderr,"0x%02x ",
163					*(uint8_t*)(symval+size-id_size+i) );
164			fprintf(stderr,"\n");
165			fatal("%s: struct %s_device_id is not terminated "
166				"with a NULL entry!\n", modname, device_id);
167		}
168	}
169}
170
171/* USB is special because the bcdDevice can be matched against a numeric range */
172/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
173static void do_usb_entry(void *symval,
174			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
175			 unsigned char range_lo, unsigned char range_hi,
176			 unsigned char max, struct module *mod)
177{
178	char alias[500];
179	DEF_FIELD(symval, usb_device_id, match_flags);
180	DEF_FIELD(symval, usb_device_id, idVendor);
181	DEF_FIELD(symval, usb_device_id, idProduct);
182	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
183	DEF_FIELD(symval, usb_device_id, bDeviceClass);
184	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
185	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
186	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
187	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
188	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
189	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
190
191	strcpy(alias, "usb:");
192	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
193	    idVendor);
194	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
195	    idProduct);
196
197	strcat(alias, "d");
198	if (bcdDevice_initial_digits)
199		sprintf(alias + strlen(alias), "%0*X",
200			bcdDevice_initial_digits, bcdDevice_initial);
201	if (range_lo == range_hi)
202		sprintf(alias + strlen(alias), "%X", range_lo);
203	else if (range_lo > 0 || range_hi < max) {
204		if (range_lo > 0x9 || range_hi < 0xA)
205			sprintf(alias + strlen(alias),
206				"[%X-%X]",
207				range_lo,
208				range_hi);
209		else {
210			sprintf(alias + strlen(alias),
211				range_lo < 0x9 ? "[%X-9" : "[%X",
212				range_lo);
213			sprintf(alias + strlen(alias),
214				range_hi > 0xA ? "A-%X]" : "%X]",
215				range_hi);
216		}
217	}
218	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
219		strcat(alias, "*");
220
221	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
222	    bDeviceClass);
223	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
224	    bDeviceSubClass);
225	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
226	    bDeviceProtocol);
227	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
228	    bInterfaceClass);
229	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
230	    bInterfaceSubClass);
231	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
232	    bInterfaceProtocol);
233	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
234	    bInterfaceNumber);
235
236	add_wildcard(alias);
237	buf_printf(&mod->dev_table_buf,
238		   "MODULE_ALIAS(\"%s\");\n", alias);
239}
240
241/* Handles increment/decrement of BCD formatted integers */
242/* Returns the previous value, so it works like i++ or i-- */
243static unsigned int incbcd(unsigned int *bcd,
244			   int inc,
245			   unsigned char max,
246			   size_t chars)
247{
248	unsigned int init = *bcd, i, j;
249	unsigned long long c, dec = 0;
250
251	/* If bcd is not in BCD format, just increment */
252	if (max > 0x9) {
253		*bcd += inc;
254		return init;
255	}
256
257	/* Convert BCD to Decimal */
258	for (i=0 ; i < chars ; i++) {
259		c = (*bcd >> (i << 2)) & 0xf;
260		c = c > 9 ? 9 : c; /* force to bcd just in case */
261		for (j=0 ; j < i ; j++)
262			c = c * 10;
263		dec += c;
264	}
265
266	/* Do our increment/decrement */
267	dec += inc;
268	*bcd  = 0;
269
270	/* Convert back to BCD */
271	for (i=0 ; i < chars ; i++) {
272		for (c=1,j=0 ; j < i ; j++)
273			c = c * 10;
274		c = (dec / c) % 10;
275		*bcd += c << (i << 2);
276	}
277	return init;
278}
279
280static void do_usb_entry_multi(void *symval, struct module *mod)
281{
282	unsigned int devlo, devhi;
283	unsigned char chi, clo, max;
284	int ndigits;
285
286	DEF_FIELD(symval, usb_device_id, match_flags);
287	DEF_FIELD(symval, usb_device_id, idVendor);
288	DEF_FIELD(symval, usb_device_id, idProduct);
289	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
290	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
291	DEF_FIELD(symval, usb_device_id, bDeviceClass);
292	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
293
294	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
295		bcdDevice_lo : 0x0U;
296	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
297		bcdDevice_hi : ~0x0U;
298
299	/* Figure out if this entry is in bcd or hex format */
300	max = 0x9; /* Default to decimal format */
301	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
302		clo = (devlo >> (ndigits << 2)) & 0xf;
303		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
304		if (clo > max || chi > max) {
305			max = 0xf;
306			break;
307		}
308	}
309
310	/*
311	 * Some modules (visor) have empty slots as placeholder for
312	 * run-time specification that results in catch-all alias
313	 */
314	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
315		return;
316
317	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
318	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
319		clo = devlo & 0xf;
320		chi = devhi & 0xf;
321		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
322			chi = max;
323		devlo >>= 4;
324		devhi >>= 4;
325
326		if (devlo == devhi || !ndigits) {
327			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
328			break;
329		}
330
331		if (clo > 0x0)
332			do_usb_entry(symval,
333				     incbcd(&devlo, 1, max,
334					    sizeof(bcdDevice_lo) * 2),
335				     ndigits, clo, max, max, mod);
336
337		if (chi < max)
338			do_usb_entry(symval,
339				     incbcd(&devhi, -1, max,
340					    sizeof(bcdDevice_lo) * 2),
341				     ndigits, 0x0, chi, max, mod);
342	}
343}
344
345static void do_usb_table(void *symval, unsigned long size,
346			 struct module *mod)
347{
348	unsigned int i;
349	const unsigned long id_size = SIZE_usb_device_id;
350
351	device_id_check(mod->name, "usb", size, id_size, symval);
352
353	/* Leave last one: it's the terminator. */
354	size -= id_size;
355
356	for (i = 0; i < size; i += id_size)
357		do_usb_entry_multi(symval + i, mod);
358}
359
360/* Looks like: hid:bNvNpN */
361static int do_hid_entry(const char *filename,
362			     void *symval, char *alias)
363{
364	DEF_FIELD(symval, hid_device_id, bus);
365	DEF_FIELD(symval, hid_device_id, group);
366	DEF_FIELD(symval, hid_device_id, vendor);
367	DEF_FIELD(symval, hid_device_id, product);
368
369	sprintf(alias, "hid:");
370	ADD(alias, "b", bus != HID_BUS_ANY, bus);
371	ADD(alias, "g", group != HID_GROUP_ANY, group);
372	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
373	ADD(alias, "p", product != HID_ANY_ID, product);
374
375	return 1;
376}
377ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
378
379/* Looks like: ieee1394:venNmoNspNverN */
380static int do_ieee1394_entry(const char *filename,
381			     void *symval, char *alias)
382{
383	DEF_FIELD(symval, ieee1394_device_id, match_flags);
384	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
385	DEF_FIELD(symval, ieee1394_device_id, model_id);
386	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
387	DEF_FIELD(symval, ieee1394_device_id, version);
388
389	strcpy(alias, "ieee1394:");
390	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
391	    vendor_id);
392	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
393	    model_id);
394	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
395	    specifier_id);
396	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
397	    version);
398
399	add_wildcard(alias);
400	return 1;
401}
402ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
403
404/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
405static int do_pci_entry(const char *filename,
406			void *symval, char *alias)
407{
408	/* Class field can be divided into these three. */
409	unsigned char baseclass, subclass, interface,
410		baseclass_mask, subclass_mask, interface_mask;
411
412	DEF_FIELD(symval, pci_device_id, vendor);
413	DEF_FIELD(symval, pci_device_id, device);
414	DEF_FIELD(symval, pci_device_id, subvendor);
415	DEF_FIELD(symval, pci_device_id, subdevice);
416	DEF_FIELD(symval, pci_device_id, class);
417	DEF_FIELD(symval, pci_device_id, class_mask);
418
419	strcpy(alias, "pci:");
420	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
421	ADD(alias, "d", device != PCI_ANY_ID, device);
422	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
423	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
424
425	baseclass = (class) >> 16;
426	baseclass_mask = (class_mask) >> 16;
427	subclass = (class) >> 8;
428	subclass_mask = (class_mask) >> 8;
429	interface = class;
430	interface_mask = class_mask;
431
432	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
433	    || (subclass_mask != 0 && subclass_mask != 0xFF)
434	    || (interface_mask != 0 && interface_mask != 0xFF)) {
435		warn("Can't handle masks in %s:%04X\n",
436		     filename, class_mask);
437		return 0;
438	}
439
440	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
441	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
442	ADD(alias, "i", interface_mask == 0xFF, interface);
443	add_wildcard(alias);
444	return 1;
445}
446ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
447
448/* looks like: "ccw:tNmNdtNdmN" */
449static int do_ccw_entry(const char *filename,
450			void *symval, char *alias)
451{
452	DEF_FIELD(symval, ccw_device_id, match_flags);
453	DEF_FIELD(symval, ccw_device_id, cu_type);
454	DEF_FIELD(symval, ccw_device_id, cu_model);
455	DEF_FIELD(symval, ccw_device_id, dev_type);
456	DEF_FIELD(symval, ccw_device_id, dev_model);
457
458	strcpy(alias, "ccw:");
459	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
460	    cu_type);
461	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
462	    cu_model);
463	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
464	    dev_type);
465	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
466	    dev_model);
467	add_wildcard(alias);
468	return 1;
469}
470ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
471
472/* looks like: "ap:tN" */
473static int do_ap_entry(const char *filename,
474		       void *symval, char *alias)
475{
476	DEF_FIELD(symval, ap_device_id, dev_type);
477
478	sprintf(alias, "ap:t%02X*", dev_type);
479	return 1;
480}
481ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
482
483/* looks like: "css:tN" */
484static int do_css_entry(const char *filename,
485			void *symval, char *alias)
486{
487	DEF_FIELD(symval, css_device_id, type);
488
489	sprintf(alias, "css:t%01X", type);
490	return 1;
491}
492ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
493
494/* Looks like: "serio:tyNprNidNexN" */
495static int do_serio_entry(const char *filename,
496			  void *symval, char *alias)
497{
498	DEF_FIELD(symval, serio_device_id, type);
499	DEF_FIELD(symval, serio_device_id, proto);
500	DEF_FIELD(symval, serio_device_id, id);
501	DEF_FIELD(symval, serio_device_id, extra);
502
503	strcpy(alias, "serio:");
504	ADD(alias, "ty", type != SERIO_ANY, type);
505	ADD(alias, "pr", proto != SERIO_ANY, proto);
506	ADD(alias, "id", id != SERIO_ANY, id);
507	ADD(alias, "ex", extra != SERIO_ANY, extra);
508
509	add_wildcard(alias);
510	return 1;
511}
512ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
513
514/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
515static int do_acpi_entry(const char *filename,
516			void *symval, char *alias)
517{
518	DEF_FIELD_ADDR(symval, acpi_device_id, id);
519	sprintf(alias, "acpi*:%s:*", *id);
520	return 1;
521}
522ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
523
524/* looks like: "pnp:dD" */
525static void do_pnp_device_entry(void *symval, unsigned long size,
526				struct module *mod)
527{
528	const unsigned long id_size = SIZE_pnp_device_id;
529	const unsigned int count = (size / id_size)-1;
530	unsigned int i;
531
532	device_id_check(mod->name, "pnp", size, id_size, symval);
533
534	for (i = 0; i < count; i++) {
535		DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
536		char acpi_id[sizeof(*id)];
537		int j;
538
539		buf_printf(&mod->dev_table_buf,
540			   "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
541
542		/* fix broken pnp bus lowercasing */
543		for (j = 0; j < sizeof(acpi_id); j++)
544			acpi_id[j] = toupper((*id)[j]);
545		buf_printf(&mod->dev_table_buf,
546			   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
547	}
548}
549
550/* looks like: "pnp:dD" for every device of the card */
551static void do_pnp_card_entries(void *symval, unsigned long size,
552				struct module *mod)
553{
554	const unsigned long id_size = SIZE_pnp_card_device_id;
555	const unsigned int count = (size / id_size)-1;
556	unsigned int i;
557
558	device_id_check(mod->name, "pnp", size, id_size, symval);
559
560	for (i = 0; i < count; i++) {
561		unsigned int j;
562		DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);
563
564		for (j = 0; j < PNP_MAX_DEVICES; j++) {
565			const char *id = (char *)(*devs)[j].id;
566			int i2, j2;
567			int dup = 0;
568
569			if (!id[0])
570				break;
571
572			/* find duplicate, already added value */
573			for (i2 = 0; i2 < i && !dup; i2++) {
574				DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
575
576				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
577					const char *id2 = (char *)(*devs)[j2].id;
578
579					if (!id2[0])
580						break;
581
582					if (!strcmp(id, id2)) {
583						dup = 1;
584						break;
585					}
586				}
587			}
588
589			/* add an individual alias for every device entry */
590			if (!dup) {
591				char acpi_id[PNP_ID_LEN];
592				int k;
593
594				buf_printf(&mod->dev_table_buf,
595					   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
596
597				/* fix broken pnp bus lowercasing */
598				for (k = 0; k < sizeof(acpi_id); k++)
599					acpi_id[k] = toupper(id[k]);
600				buf_printf(&mod->dev_table_buf,
601					   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
602			}
603		}
604	}
605}
606
607/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
608static int do_pcmcia_entry(const char *filename,
609			   void *symval, char *alias)
610{
611	unsigned int i;
612	DEF_FIELD(symval, pcmcia_device_id, match_flags);
613	DEF_FIELD(symval, pcmcia_device_id, manf_id);
614	DEF_FIELD(symval, pcmcia_device_id, card_id);
615	DEF_FIELD(symval, pcmcia_device_id, func_id);
616	DEF_FIELD(symval, pcmcia_device_id, function);
617	DEF_FIELD(symval, pcmcia_device_id, device_no);
618	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
619
620	for (i=0; i<4; i++) {
621		(*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
622	}
623
624	strcpy(alias, "pcmcia:");
625	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
626	    manf_id);
627	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
628	    card_id);
629	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
630	    func_id);
631	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
632	    function);
633	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
634	    device_no);
635	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
636	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
637	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
638	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
639
640	add_wildcard(alias);
641	return 1;
642}
643ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
644
645static int do_of_entry (const char *filename, void *symval, char *alias)
646{
647	int len;
648	char *tmp;
649	DEF_FIELD_ADDR(symval, of_device_id, name);
650	DEF_FIELD_ADDR(symval, of_device_id, type);
651	DEF_FIELD_ADDR(symval, of_device_id, compatible);
652
653	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
654		      (*type)[0] ? *type : "*");
655
656	if ((*compatible)[0])
657		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
658			*compatible);
659
660	/* Replace all whitespace with underscores */
661	for (tmp = alias; tmp && *tmp; tmp++)
662		if (isspace (*tmp))
663			*tmp = '_';
664
665	add_wildcard(alias);
666	return 1;
667}
668ADD_TO_DEVTABLE("of", of_device_id, do_of_entry);
669
670static int do_vio_entry(const char *filename, void *symval,
671		char *alias)
672{
673	char *tmp;
674	DEF_FIELD_ADDR(symval, vio_device_id, type);
675	DEF_FIELD_ADDR(symval, vio_device_id, compat);
676
677	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
678			(*compat)[0] ? *compat : "*");
679
680	/* Replace all whitespace with underscores */
681	for (tmp = alias; tmp && *tmp; tmp++)
682		if (isspace (*tmp))
683			*tmp = '_';
684
685	add_wildcard(alias);
686	return 1;
687}
688ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
689
690#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
691
692static void do_input(char *alias,
693		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
694{
695	unsigned int i;
696
697	for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
698		arr[i] = TO_NATIVE(arr[i]);
699	for (i = min; i < max; i++)
700		if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
701			sprintf(alias + strlen(alias), "%X,*", i);
702}
703
704/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
705static int do_input_entry(const char *filename, void *symval,
706			  char *alias)
707{
708	DEF_FIELD(symval, input_device_id, flags);
709	DEF_FIELD(symval, input_device_id, bustype);
710	DEF_FIELD(symval, input_device_id, vendor);
711	DEF_FIELD(symval, input_device_id, product);
712	DEF_FIELD(symval, input_device_id, version);
713	DEF_FIELD_ADDR(symval, input_device_id, evbit);
714	DEF_FIELD_ADDR(symval, input_device_id, keybit);
715	DEF_FIELD_ADDR(symval, input_device_id, relbit);
716	DEF_FIELD_ADDR(symval, input_device_id, absbit);
717	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
718	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
719	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
720	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
721	DEF_FIELD_ADDR(symval, input_device_id, swbit);
722
723	sprintf(alias, "input:");
724
725	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
726	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
727	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
728	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
729
730	sprintf(alias + strlen(alias), "-e*");
731	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
732		do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
733	sprintf(alias + strlen(alias), "k*");
734	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
735		do_input(alias, *keybit,
736			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
737			 INPUT_DEVICE_ID_KEY_MAX);
738	sprintf(alias + strlen(alias), "r*");
739	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
740		do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
741	sprintf(alias + strlen(alias), "a*");
742	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
743		do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
744	sprintf(alias + strlen(alias), "m*");
745	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
746		do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
747	sprintf(alias + strlen(alias), "l*");
748	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
749		do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
750	sprintf(alias + strlen(alias), "s*");
751	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
752		do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
753	sprintf(alias + strlen(alias), "f*");
754	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
755		do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
756	sprintf(alias + strlen(alias), "w*");
757	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
758		do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
759	return 1;
760}
761ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
762
763static int do_eisa_entry(const char *filename, void *symval,
764		char *alias)
765{
766	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
767	if (sig[0])
768		sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
769	else
770		strcat(alias, "*");
771	return 1;
772}
773ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
774
775/* Looks like: parisc:tNhvNrevNsvN */
776static int do_parisc_entry(const char *filename, void *symval,
777		char *alias)
778{
779	DEF_FIELD(symval, parisc_device_id, hw_type);
780	DEF_FIELD(symval, parisc_device_id, hversion);
781	DEF_FIELD(symval, parisc_device_id, hversion_rev);
782	DEF_FIELD(symval, parisc_device_id, sversion);
783
784	strcpy(alias, "parisc:");
785	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
786	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
787	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
788	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
789
790	add_wildcard(alias);
791	return 1;
792}
793ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
794
795/* Looks like: sdio:cNvNdN. */
796static int do_sdio_entry(const char *filename,
797			void *symval, char *alias)
798{
799	DEF_FIELD(symval, sdio_device_id, class);
800	DEF_FIELD(symval, sdio_device_id, vendor);
801	DEF_FIELD(symval, sdio_device_id, device);
802
803	strcpy(alias, "sdio:");
804	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
805	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
806	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
807	add_wildcard(alias);
808	return 1;
809}
810ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
811
812/* Looks like: ssb:vNidNrevN. */
813static int do_ssb_entry(const char *filename,
814			void *symval, char *alias)
815{
816	DEF_FIELD(symval, ssb_device_id, vendor);
817	DEF_FIELD(symval, ssb_device_id, coreid);
818	DEF_FIELD(symval, ssb_device_id, revision);
819
820	strcpy(alias, "ssb:");
821	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
822	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
823	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
824	add_wildcard(alias);
825	return 1;
826}
827ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
828
829/* Looks like: bcma:mNidNrevNclN. */
830static int do_bcma_entry(const char *filename,
831			 void *symval, char *alias)
832{
833	DEF_FIELD(symval, bcma_device_id, manuf);
834	DEF_FIELD(symval, bcma_device_id, id);
835	DEF_FIELD(symval, bcma_device_id, rev);
836	DEF_FIELD(symval, bcma_device_id, class);
837
838	strcpy(alias, "bcma:");
839	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
840	ADD(alias, "id", id != BCMA_ANY_ID, id);
841	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
842	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
843	add_wildcard(alias);
844	return 1;
845}
846ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
847
848/* Looks like: virtio:dNvN */
849static int do_virtio_entry(const char *filename, void *symval,
850			   char *alias)
851{
852	DEF_FIELD(symval, virtio_device_id, device);
853	DEF_FIELD(symval, virtio_device_id, vendor);
854
855	strcpy(alias, "virtio:");
856	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
857	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
858
859	add_wildcard(alias);
860	return 1;
861}
862ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
863
864/*
865 * Looks like: vmbus:guid
866 * Each byte of the guid will be represented by two hex characters
867 * in the name.
868 */
869
870static int do_vmbus_entry(const char *filename, void *symval,
871			  char *alias)
872{
873	int i;
874	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
875	char guid_name[(sizeof(*guid) + 1) * 2];
876
877	for (i = 0; i < (sizeof(*guid) * 2); i += 2)
878		sprintf(&guid_name[i], "%02x", TO_NATIVE((*guid)[i/2]));
879
880	strcpy(alias, "vmbus:");
881	strcat(alias, guid_name);
882
883	return 1;
884}
885ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
886
887/* Looks like: i2c:S */
888static int do_i2c_entry(const char *filename, void *symval,
889			char *alias)
890{
891	DEF_FIELD_ADDR(symval, i2c_device_id, name);
892	sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
893
894	return 1;
895}
896ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
897
898/* Looks like: spi:S */
899static int do_spi_entry(const char *filename, void *symval,
900			char *alias)
901{
902	DEF_FIELD_ADDR(symval, spi_device_id, name);
903	sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
904
905	return 1;
906}
907ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
908
909static const struct dmifield {
910	const char *prefix;
911	int field;
912} dmi_fields[] = {
913	{ "bvn", DMI_BIOS_VENDOR },
914	{ "bvr", DMI_BIOS_VERSION },
915	{ "bd",  DMI_BIOS_DATE },
916	{ "svn", DMI_SYS_VENDOR },
917	{ "pn",  DMI_PRODUCT_NAME },
918	{ "pvr", DMI_PRODUCT_VERSION },
919	{ "rvn", DMI_BOARD_VENDOR },
920	{ "rn",  DMI_BOARD_NAME },
921	{ "rvr", DMI_BOARD_VERSION },
922	{ "cvn", DMI_CHASSIS_VENDOR },
923	{ "ct",  DMI_CHASSIS_TYPE },
924	{ "cvr", DMI_CHASSIS_VERSION },
925	{ NULL,  DMI_NONE }
926};
927
928static void dmi_ascii_filter(char *d, const char *s)
929{
930	/* Filter out characters we don't want to see in the modalias string */
931	for (; *s; s++)
932		if (*s > ' ' && *s < 127 && *s != ':')
933			*(d++) = *s;
934
935	*d = 0;
936}
937
938
939static int do_dmi_entry(const char *filename, void *symval,
940			char *alias)
941{
942	int i, j;
943	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
944	sprintf(alias, "dmi*");
945
946	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
947		for (j = 0; j < 4; j++) {
948			if ((*matches)[j].slot &&
949			    (*matches)[j].slot == dmi_fields[i].field) {
950				sprintf(alias + strlen(alias), ":%s*",
951					dmi_fields[i].prefix);
952				dmi_ascii_filter(alias + strlen(alias),
953						 (*matches)[j].substr);
954				strcat(alias, "*");
955			}
956		}
957	}
958
959	strcat(alias, ":");
960	return 1;
961}
962ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
963
964static int do_platform_entry(const char *filename,
965			     void *symval, char *alias)
966{
967	DEF_FIELD_ADDR(symval, platform_device_id, name);
968	sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
969	return 1;
970}
971ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
972
973static int do_mdio_entry(const char *filename,
974			 void *symval, char *alias)
975{
976	int i;
977	DEF_FIELD(symval, mdio_device_id, phy_id);
978	DEF_FIELD(symval, mdio_device_id, phy_id_mask);
979
980	alias += sprintf(alias, MDIO_MODULE_PREFIX);
981
982	for (i = 0; i < 32; i++) {
983		if (!((phy_id_mask >> (31-i)) & 1))
984			*(alias++) = '?';
985		else if ((phy_id >> (31-i)) & 1)
986			*(alias++) = '1';
987		else
988			*(alias++) = '0';
989	}
990
991	/* Terminate the string */
992	*alias = 0;
993
994	return 1;
995}
996ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
997
998/* Looks like: zorro:iN. */
999static int do_zorro_entry(const char *filename, void *symval,
1000			  char *alias)
1001{
1002	DEF_FIELD(symval, zorro_device_id, id);
1003	strcpy(alias, "zorro:");
1004	ADD(alias, "i", id != ZORRO_WILDCARD, id);
1005	return 1;
1006}
1007ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
1008
1009/* looks like: "pnp:dD" */
1010static int do_isapnp_entry(const char *filename,
1011			   void *symval, char *alias)
1012{
1013	DEF_FIELD(symval, isapnp_device_id, vendor);
1014	DEF_FIELD(symval, isapnp_device_id, function);
1015	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1016		'A' + ((vendor >> 2) & 0x3f) - 1,
1017		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1018		'A' + ((vendor >> 8) & 0x1f) - 1,
1019		(function >> 4) & 0x0f, function & 0x0f,
1020		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
1021	return 1;
1022}
1023ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
1024
1025/* Looks like: "ipack:fNvNdN". */
1026static int do_ipack_entry(const char *filename,
1027			  void *symval, char *alias)
1028{
1029	DEF_FIELD(symval, ipack_device_id, format);
1030	DEF_FIELD(symval, ipack_device_id, vendor);
1031	DEF_FIELD(symval, ipack_device_id, device);
1032	strcpy(alias, "ipack:");
1033	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1034	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1035	ADD(alias, "d", device != IPACK_ANY_ID, device);
1036	add_wildcard(alias);
1037	return 1;
1038}
1039ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
1040
1041/*
1042 * Append a match expression for a single masked hex digit.
1043 * outp points to a pointer to the character at which to append.
1044 *	*outp is updated on return to point just after the appended text,
1045 *	to facilitate further appending.
1046 */
1047static void append_nibble_mask(char **outp,
1048			       unsigned int nibble, unsigned int mask)
1049{
1050	char *p = *outp;
1051	unsigned int i;
1052
1053	switch (mask) {
1054	case 0:
1055		*p++ = '?';
1056		break;
1057
1058	case 0xf:
1059		p += sprintf(p, "%X",  nibble);
1060		break;
1061
1062	default:
1063		/*
1064		 * Dumbly emit a match pattern for all possible matching
1065		 * digits.  This could be improved in some cases using ranges,
1066		 * but it has the advantage of being trivially correct, and is
1067		 * often optimal.
1068		 */
1069		*p++ = '[';
1070		for (i = 0; i < 0x10; i++)
1071			if ((i & mask) == nibble)
1072				p += sprintf(p, "%X", i);
1073		*p++ = ']';
1074	}
1075
1076	/* Ensure that the string remains NUL-terminated: */
1077	*p = '\0';
1078
1079	/* Advance the caller's end-of-string pointer: */
1080	*outp = p;
1081}
1082
1083/*
1084 * looks like: "amba:dN"
1085 *
1086 * N is exactly 8 digits, where each is an upper-case hex digit, or
1087 *	a ? or [] pattern matching exactly one digit.
1088 */
1089static int do_amba_entry(const char *filename,
1090			 void *symval, char *alias)
1091{
1092	unsigned int digit;
1093	char *p = alias;
1094	DEF_FIELD(symval, amba_id, id);
1095	DEF_FIELD(symval, amba_id, mask);
1096
1097	if ((id & mask) != id)
1098		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1099		      "id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1100		      filename, id, mask);
1101
1102	p += sprintf(alias, "amba:d");
1103	for (digit = 0; digit < 8; digit++)
1104		append_nibble_mask(&p,
1105				   (id >> (4 * (7 - digit))) & 0xf,
1106				   (mask >> (4 * (7 - digit))) & 0xf);
1107
1108	return 1;
1109}
1110ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
1111
1112/*
1113 * looks like: "mipscdmm:tN"
1114 *
1115 * N is exactly 2 digits, where each is an upper-case hex digit, or
1116 *	a ? or [] pattern matching exactly one digit.
1117 */
1118static int do_mips_cdmm_entry(const char *filename,
1119			      void *symval, char *alias)
1120{
1121	DEF_FIELD(symval, mips_cdmm_device_id, type);
1122
1123	sprintf(alias, "mipscdmm:t%02X*", type);
1124	return 1;
1125}
1126ADD_TO_DEVTABLE("mipscdmm", mips_cdmm_device_id, do_mips_cdmm_entry);
1127
1128/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1129 * All fields are numbers. It would be nicer to use strings for vendor
1130 * and feature, but getting those out of the build system here is too
1131 * complicated.
1132 */
1133
1134static int do_x86cpu_entry(const char *filename, void *symval,
1135			   char *alias)
1136{
1137	DEF_FIELD(symval, x86_cpu_id, feature);
1138	DEF_FIELD(symval, x86_cpu_id, family);
1139	DEF_FIELD(symval, x86_cpu_id, model);
1140	DEF_FIELD(symval, x86_cpu_id, vendor);
1141
1142	strcpy(alias, "cpu:type:x86,");
1143	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1144	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1145	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1146	strcat(alias, ":feature:*");
1147	if (feature != X86_FEATURE_ANY)
1148		sprintf(alias + strlen(alias), "%04X*", feature);
1149	return 1;
1150}
1151ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
1152
1153/* LOOKS like cpu:type:*:feature:*FEAT* */
1154static int do_cpu_entry(const char *filename, void *symval, char *alias)
1155{
1156	DEF_FIELD(symval, cpu_feature, feature);
1157
1158	sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1159	return 1;
1160}
1161ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);
1162
1163/* Looks like: mei:S */
1164static int do_mei_entry(const char *filename, void *symval,
1165			char *alias)
1166{
1167	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1168
1169	sprintf(alias, MEI_CL_MODULE_PREFIX "%s", *name);
1170
1171	return 1;
1172}
1173ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
1174
1175/* Looks like: rapidio:vNdNavNadN */
1176static int do_rio_entry(const char *filename,
1177			void *symval, char *alias)
1178{
1179	DEF_FIELD(symval, rio_device_id, did);
1180	DEF_FIELD(symval, rio_device_id, vid);
1181	DEF_FIELD(symval, rio_device_id, asm_did);
1182	DEF_FIELD(symval, rio_device_id, asm_vid);
1183
1184	strcpy(alias, "rapidio:");
1185	ADD(alias, "v", vid != RIO_ANY_ID, vid);
1186	ADD(alias, "d", did != RIO_ANY_ID, did);
1187	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1188	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1189
1190	add_wildcard(alias);
1191	return 1;
1192}
1193ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
1194
1195/* Does namelen bytes of name exactly match the symbol? */
1196static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1197{
1198	if (namelen != strlen(symbol))
1199		return false;
1200
1201	return memcmp(name, symbol, namelen) == 0;
1202}
1203
1204static void do_table(void *symval, unsigned long size,
1205		     unsigned long id_size,
1206		     const char *device_id,
1207		     void *function,
1208		     struct module *mod)
1209{
1210	unsigned int i;
1211	char alias[500];
1212	int (*do_entry)(const char *, void *entry, char *alias) = function;
1213
1214	device_id_check(mod->name, device_id, size, id_size, symval);
1215	/* Leave last one: it's the terminator. */
1216	size -= id_size;
1217
1218	for (i = 0; i < size; i += id_size) {
1219		if (do_entry(mod->name, symval+i, alias)) {
1220			buf_printf(&mod->dev_table_buf,
1221				   "MODULE_ALIAS(\"%s\");\n", alias);
1222		}
1223	}
1224}
1225
1226/* Create MODULE_ALIAS() statements.
1227 * At this time, we cannot write the actual output C source yet,
1228 * so we write into the mod->dev_table_buf buffer. */
1229void handle_moddevtable(struct module *mod, struct elf_info *info,
1230			Elf_Sym *sym, const char *symname)
1231{
1232	void *symval;
1233	char *zeros = NULL;
1234	const char *name, *identifier;
1235	unsigned int namelen;
1236
1237	/* We're looking for a section relative symbol */
1238	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1239		return;
1240
1241	/* We're looking for an object */
1242	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1243		return;
1244
1245	/* All our symbols are of form <prefix>__mod_<name>__<identifier>_device_table. */
1246	name = strstr(symname, "__mod_");
1247	if (!name)
1248		return;
1249	name += strlen("__mod_");
1250	namelen = strlen(name);
1251	if (namelen < strlen("_device_table"))
1252		return;
1253	if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1254		return;
1255	identifier = strstr(name, "__");
1256	if (!identifier)
1257		return;
1258	namelen = identifier - name;
1259
1260	/* Handle all-NULL symbols allocated into .bss */
1261	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1262		zeros = calloc(1, sym->st_size);
1263		symval = zeros;
1264	} else {
1265		symval = (void *)info->hdr
1266			+ info->sechdrs[get_secindex(info, sym)].sh_offset
1267			+ sym->st_value;
1268	}
1269
1270	/* First handle the "special" cases */
1271	if (sym_is(name, namelen, "usb"))
1272		do_usb_table(symval, sym->st_size, mod);
1273	else if (sym_is(name, namelen, "pnp"))
1274		do_pnp_device_entry(symval, sym->st_size, mod);
1275	else if (sym_is(name, namelen, "pnp_card"))
1276		do_pnp_card_entries(symval, sym->st_size, mod);
1277	else {
1278		struct devtable **p;
1279		INIT_SECTION(__devtable);
1280
1281		for (p = __start___devtable; p < __stop___devtable; p++) {
1282			if (sym_is(name, namelen, (*p)->device_id)) {
1283				do_table(symval, sym->st_size, (*p)->id_size,
1284					 (*p)->device_id, (*p)->function, mod);
1285				break;
1286			}
1287		}
1288	}
1289	free(zeros);
1290}
1291
1292/* Now add out buffered information to the generated C source */
1293void add_moddevtable(struct buffer *buf, struct module *mod)
1294{
1295	buf_printf(buf, "\n");
1296	buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1297	free(mod->dev_table_buf.p);
1298}
1299