524 lines
16 KiB
C
524 lines
16 KiB
C
/* Simple code to turn various tables in an ELF file into alias definitions.
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* This deals with kernel datastructures where they should be
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* dealt with: in the kernel source.
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*
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* Copyright 2002-2003 Rusty Russell, IBM Corporation
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* 2003 Kai Germaschewski
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*
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*/
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#include "modpost.h"
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/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
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* use either stdint.h or inttypes.h for the rest. */
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#if KERNEL_ELFCLASS == ELFCLASS32
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typedef Elf32_Addr kernel_ulong_t;
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#define BITS_PER_LONG 32
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#else
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typedef Elf64_Addr kernel_ulong_t;
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#define BITS_PER_LONG 64
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#endif
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#ifdef __sun__
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#include <inttypes.h>
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#else
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#include <stdint.h>
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#endif
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#include <ctype.h>
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typedef uint32_t __u32;
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typedef uint16_t __u16;
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typedef unsigned char __u8;
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/* Big exception to the "don't include kernel headers into userspace, which
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* even potentially has different endianness and word sizes, since
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* we handle those differences explicitly below */
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#include "../../include/linux/mod_devicetable.h"
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#include "../../include/linux/input.h"
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#define ADD(str, sep, cond, field) \
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do { \
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strcat(str, sep); \
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if (cond) \
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sprintf(str + strlen(str), \
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sizeof(field) == 1 ? "%02X" : \
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sizeof(field) == 2 ? "%04X" : \
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sizeof(field) == 4 ? "%08X" : "", \
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field); \
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else \
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sprintf(str + strlen(str), "*"); \
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} while(0)
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/* USB is special because the bcdDevice can be matched against a numeric range */
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/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
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static void do_usb_entry(struct usb_device_id *id,
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unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
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unsigned char range_lo, unsigned char range_hi,
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struct module *mod)
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{
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char alias[500];
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strcpy(alias, "usb:");
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ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
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id->idVendor);
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ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
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id->idProduct);
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strcat(alias, "d");
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if (bcdDevice_initial_digits)
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sprintf(alias + strlen(alias), "%0*X",
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bcdDevice_initial_digits, bcdDevice_initial);
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if (range_lo == range_hi)
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sprintf(alias + strlen(alias), "%u", range_lo);
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else if (range_lo > 0 || range_hi < 9)
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sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi);
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if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
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strcat(alias, "*");
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ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
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id->bDeviceClass);
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ADD(alias, "dsc",
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id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
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id->bDeviceSubClass);
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ADD(alias, "dp",
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id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
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id->bDeviceProtocol);
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ADD(alias, "ic",
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id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
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id->bInterfaceClass);
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ADD(alias, "isc",
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id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
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id->bInterfaceSubClass);
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ADD(alias, "ip",
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id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
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id->bInterfaceProtocol);
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/* Always end in a wildcard, for future extension */
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if (alias[strlen(alias)-1] != '*')
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strcat(alias, "*");
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buf_printf(&mod->dev_table_buf,
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"MODULE_ALIAS(\"%s\");\n", alias);
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}
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static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
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{
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unsigned int devlo, devhi;
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unsigned char chi, clo;
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int ndigits;
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id->match_flags = TO_NATIVE(id->match_flags);
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id->idVendor = TO_NATIVE(id->idVendor);
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id->idProduct = TO_NATIVE(id->idProduct);
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devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
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TO_NATIVE(id->bcdDevice_lo) : 0x0U;
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devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
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TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
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/*
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* Some modules (visor) have empty slots as placeholder for
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* run-time specification that results in catch-all alias
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*/
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if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
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return;
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/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
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for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
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clo = devlo & 0xf;
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chi = devhi & 0xf;
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if (chi > 9) /* it's bcd not hex */
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chi = 9;
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devlo >>= 4;
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devhi >>= 4;
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if (devlo == devhi || !ndigits) {
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do_usb_entry(id, devlo, ndigits, clo, chi, mod);
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break;
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}
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if (clo > 0)
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do_usb_entry(id, devlo++, ndigits, clo, 9, mod);
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if (chi < 9)
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do_usb_entry(id, devhi--, ndigits, 0, chi, mod);
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}
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}
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static void do_usb_table(void *symval, unsigned long size,
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struct module *mod)
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{
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unsigned int i;
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const unsigned long id_size = sizeof(struct usb_device_id);
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if (size % id_size || size < id_size) {
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warn("%s ids %lu bad size "
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"(each on %lu)\n", mod->name, size, id_size);
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}
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/* Leave last one: it's the terminator. */
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size -= id_size;
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for (i = 0; i < size; i += id_size)
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do_usb_entry_multi(symval + i, mod);
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}
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/* Looks like: ieee1394:venNmoNspNverN */
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static int do_ieee1394_entry(const char *filename,
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struct ieee1394_device_id *id, char *alias)
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{
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id->match_flags = TO_NATIVE(id->match_flags);
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id->vendor_id = TO_NATIVE(id->vendor_id);
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id->model_id = TO_NATIVE(id->model_id);
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id->specifier_id = TO_NATIVE(id->specifier_id);
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id->version = TO_NATIVE(id->version);
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strcpy(alias, "ieee1394:");
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ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
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id->vendor_id);
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ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
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id->model_id);
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ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
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id->specifier_id);
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ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
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id->version);
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return 1;
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}
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/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
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static int do_pci_entry(const char *filename,
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struct pci_device_id *id, char *alias)
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{
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/* Class field can be divided into these three. */
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unsigned char baseclass, subclass, interface,
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baseclass_mask, subclass_mask, interface_mask;
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id->vendor = TO_NATIVE(id->vendor);
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id->device = TO_NATIVE(id->device);
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id->subvendor = TO_NATIVE(id->subvendor);
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id->subdevice = TO_NATIVE(id->subdevice);
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id->class = TO_NATIVE(id->class);
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id->class_mask = TO_NATIVE(id->class_mask);
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strcpy(alias, "pci:");
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ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
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ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
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ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
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ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
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baseclass = (id->class) >> 16;
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baseclass_mask = (id->class_mask) >> 16;
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subclass = (id->class) >> 8;
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subclass_mask = (id->class_mask) >> 8;
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interface = id->class;
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interface_mask = id->class_mask;
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if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
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|| (subclass_mask != 0 && subclass_mask != 0xFF)
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|| (interface_mask != 0 && interface_mask != 0xFF)) {
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warn("Can't handle masks in %s:%04X\n",
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filename, id->class_mask);
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return 0;
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}
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ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
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ADD(alias, "sc", subclass_mask == 0xFF, subclass);
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ADD(alias, "i", interface_mask == 0xFF, interface);
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return 1;
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}
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/* looks like: "ccw:tNmNdtNdmN" */
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static int do_ccw_entry(const char *filename,
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struct ccw_device_id *id, char *alias)
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{
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id->match_flags = TO_NATIVE(id->match_flags);
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id->cu_type = TO_NATIVE(id->cu_type);
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id->cu_model = TO_NATIVE(id->cu_model);
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id->dev_type = TO_NATIVE(id->dev_type);
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id->dev_model = TO_NATIVE(id->dev_model);
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strcpy(alias, "ccw:");
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ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
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id->cu_type);
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ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
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id->cu_model);
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ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
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id->dev_type);
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ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
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id->dev_model);
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return 1;
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}
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/* Looks like: "serio:tyNprNidNexN" */
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static int do_serio_entry(const char *filename,
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struct serio_device_id *id, char *alias)
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{
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id->type = TO_NATIVE(id->type);
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id->proto = TO_NATIVE(id->proto);
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id->id = TO_NATIVE(id->id);
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id->extra = TO_NATIVE(id->extra);
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strcpy(alias, "serio:");
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ADD(alias, "ty", id->type != SERIO_ANY, id->type);
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ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
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ADD(alias, "id", id->id != SERIO_ANY, id->id);
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ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
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return 1;
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}
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/* looks like: "pnp:dD" */
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static int do_pnp_entry(const char *filename,
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struct pnp_device_id *id, char *alias)
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{
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sprintf(alias, "pnp:d%s", id->id);
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return 1;
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}
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/* looks like: "pnp:cCdD..." */
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static int do_pnp_card_entry(const char *filename,
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struct pnp_card_device_id *id, char *alias)
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{
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int i;
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sprintf(alias, "pnp:c%s", id->id);
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for (i = 0; i < PNP_MAX_DEVICES; i++) {
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if (! *id->devs[i].id)
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break;
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sprintf(alias + strlen(alias), "d%s", id->devs[i].id);
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}
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return 1;
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}
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/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
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static int do_pcmcia_entry(const char *filename,
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struct pcmcia_device_id *id, char *alias)
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{
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unsigned int i;
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id->match_flags = TO_NATIVE(id->match_flags);
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id->manf_id = TO_NATIVE(id->manf_id);
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id->card_id = TO_NATIVE(id->card_id);
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id->func_id = TO_NATIVE(id->func_id);
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id->function = TO_NATIVE(id->function);
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id->device_no = TO_NATIVE(id->device_no);
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for (i=0; i<4; i++) {
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id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
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}
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strcpy(alias, "pcmcia:");
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ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
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id->manf_id);
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ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
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id->card_id);
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ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
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id->func_id);
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ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
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id->function);
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ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
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id->device_no);
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ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
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ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
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ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
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ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
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return 1;
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}
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static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
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{
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char *tmp;
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sprintf (alias, "of:N%sT%sC%s",
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of->name[0] ? of->name : "*",
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of->type[0] ? of->type : "*",
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of->compatible[0] ? of->compatible : "*");
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/* Replace all whitespace with underscores */
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for (tmp = alias; tmp && *tmp; tmp++)
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if (isspace (*tmp))
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*tmp = '_';
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return 1;
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}
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static int do_vio_entry(const char *filename, struct vio_device_id *vio,
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char *alias)
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{
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char *tmp;
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sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
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vio->compat[0] ? vio->compat : "*");
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/* Replace all whitespace with underscores */
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for (tmp = alias; tmp && *tmp; tmp++)
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if (isspace (*tmp))
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*tmp = '_';
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return 1;
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}
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static int do_i2c_entry(const char *filename, struct i2c_device_id *i2c, char *alias)
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{
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strcpy(alias, "i2c:");
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ADD(alias, "id", 1, i2c->id);
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return 1;
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}
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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static void do_input(char *alias,
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kernel_ulong_t *arr, unsigned int min, unsigned int max)
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{
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unsigned int i;
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for (i = min; i < max; i++) {
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if (arr[i/BITS_PER_LONG] & (1 << (i%BITS_PER_LONG)))
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sprintf(alias+strlen(alias), "%X,*", i);
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}
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}
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/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
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static int do_input_entry(const char *filename, struct input_device_id *id,
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char *alias)
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{
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sprintf(alias, "input:");
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ADD(alias, "b", id->flags&INPUT_DEVICE_ID_MATCH_BUS, id->id.bustype);
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ADD(alias, "v", id->flags&INPUT_DEVICE_ID_MATCH_VENDOR, id->id.vendor);
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ADD(alias, "p", id->flags&INPUT_DEVICE_ID_MATCH_PRODUCT,
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id->id.product);
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ADD(alias, "e", id->flags&INPUT_DEVICE_ID_MATCH_VERSION,
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id->id.version);
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sprintf(alias + strlen(alias), "-e*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_EVBIT)
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do_input(alias, id->evbit, 0, EV_MAX);
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sprintf(alias + strlen(alias), "k*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_KEYBIT)
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do_input(alias, id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
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sprintf(alias + strlen(alias), "r*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_RELBIT)
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do_input(alias, id->relbit, 0, REL_MAX);
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sprintf(alias + strlen(alias), "a*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_ABSBIT)
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do_input(alias, id->absbit, 0, ABS_MAX);
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sprintf(alias + strlen(alias), "m*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_MSCIT)
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do_input(alias, id->mscbit, 0, MSC_MAX);
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sprintf(alias + strlen(alias), "l*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_LEDBIT)
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do_input(alias, id->ledbit, 0, LED_MAX);
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sprintf(alias + strlen(alias), "s*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_SNDBIT)
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do_input(alias, id->sndbit, 0, SND_MAX);
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sprintf(alias + strlen(alias), "f*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_FFBIT)
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do_input(alias, id->ffbit, 0, FF_MAX);
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sprintf(alias + strlen(alias), "w*");
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if (id->flags&INPUT_DEVICE_ID_MATCH_SWBIT)
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do_input(alias, id->swbit, 0, SW_MAX);
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return 1;
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}
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/* Ignore any prefix, eg. v850 prepends _ */
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static inline int sym_is(const char *symbol, const char *name)
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{
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const char *match;
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match = strstr(symbol, name);
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if (!match)
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return 0;
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return match[strlen(symbol)] == '\0';
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}
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static void do_table(void *symval, unsigned long size,
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unsigned long id_size,
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void *function,
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struct module *mod)
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{
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unsigned int i;
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char alias[500];
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int (*do_entry)(const char *, void *entry, char *alias) = function;
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if (size % id_size || size < id_size) {
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warn("%s ids %lu bad size "
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"(each on %lu)\n", mod->name, size, id_size);
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}
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/* Leave last one: it's the terminator. */
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size -= id_size;
|
|
|
|
for (i = 0; i < size; i += id_size) {
|
|
if (do_entry(mod->name, symval+i, alias)) {
|
|
/* Always end in a wildcard, for future extension */
|
|
if (alias[strlen(alias)-1] != '*')
|
|
strcat(alias, "*");
|
|
buf_printf(&mod->dev_table_buf,
|
|
"MODULE_ALIAS(\"%s\");\n", alias);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Create MODULE_ALIAS() statements.
|
|
* At this time, we cannot write the actual output C source yet,
|
|
* so we write into the mod->dev_table_buf buffer. */
|
|
void handle_moddevtable(struct module *mod, struct elf_info *info,
|
|
Elf_Sym *sym, const char *symname)
|
|
{
|
|
void *symval;
|
|
|
|
/* We're looking for a section relative symbol */
|
|
if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
|
|
return;
|
|
|
|
symval = (void *)info->hdr
|
|
+ info->sechdrs[sym->st_shndx].sh_offset
|
|
+ sym->st_value;
|
|
|
|
if (sym_is(symname, "__mod_pci_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct pci_device_id),
|
|
do_pci_entry, mod);
|
|
else if (sym_is(symname, "__mod_usb_device_table"))
|
|
/* special case to handle bcdDevice ranges */
|
|
do_usb_table(symval, sym->st_size, mod);
|
|
else if (sym_is(symname, "__mod_ieee1394_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct ieee1394_device_id),
|
|
do_ieee1394_entry, mod);
|
|
else if (sym_is(symname, "__mod_ccw_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct ccw_device_id),
|
|
do_ccw_entry, mod);
|
|
else if (sym_is(symname, "__mod_serio_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct serio_device_id),
|
|
do_serio_entry, mod);
|
|
else if (sym_is(symname, "__mod_pnp_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct pnp_device_id),
|
|
do_pnp_entry, mod);
|
|
else if (sym_is(symname, "__mod_pnp_card_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct pnp_card_device_id),
|
|
do_pnp_card_entry, mod);
|
|
else if (sym_is(symname, "__mod_pcmcia_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct pcmcia_device_id),
|
|
do_pcmcia_entry, mod);
|
|
else if (sym_is(symname, "__mod_of_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct of_device_id),
|
|
do_of_entry, mod);
|
|
else if (sym_is(symname, "__mod_vio_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct vio_device_id),
|
|
do_vio_entry, mod);
|
|
else if (sym_is(symname, "__mod_i2c_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct i2c_device_id),
|
|
do_i2c_entry, mod);
|
|
else if (sym_is(symname, "__mod_input_device_table"))
|
|
do_table(symval, sym->st_size, sizeof(struct input_device_id),
|
|
do_input_entry, mod);
|
|
}
|
|
|
|
/* Now add out buffered information to the generated C source */
|
|
void add_moddevtable(struct buffer *buf, struct module *mod)
|
|
{
|
|
buf_printf(buf, "\n");
|
|
buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
|
|
free(mod->dev_table_buf.p);
|
|
}
|