cistpl.c
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- /*======================================================================
- PCMCIA Card Information Structure parser
- cistpl.c 1.97 2001/10/04 03:33:49
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
- The initial developer of the original code is David A. Hinds
- <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
- are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
- Alternatively, the contents of this file may be used under the
- terms of the GNU General Public License version 2 (the "GPL"), in
- which case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
- ======================================================================*/
- #define __NO_VERSION__
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/major.h>
- #include <linux/errno.h>
- #include <linux/timer.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/pci.h>
- #include <linux/ioport.h>
- #include <asm/io.h>
- #include <asm/byteorder.h>
- #include <pcmcia/cs_types.h>
- #include <pcmcia/bus_ops.h>
- #include <pcmcia/ss.h>
- #include <pcmcia/cs.h>
- #include <pcmcia/bulkmem.h>
- #include <pcmcia/cisreg.h>
- #include <pcmcia/cistpl.h>
- #include "cs_internal.h"
- static const u_char mantissa[] = {
- 10, 12, 13, 15, 20, 25, 30, 35,
- 40, 45, 50, 55, 60, 70, 80, 90
- };
- static const u_int exponent[] = {
- 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
- };
- /* Convert an extended speed byte to a time in nanoseconds */
- #define SPEED_CVT(v)
- (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
- /* Convert a power byte to a current in 0.1 microamps */
- #define POWER_CVT(v)
- (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
- #define POWER_SCALE(v) (exponent[(v)&7])
- /* Upper limit on reasonable # of tuples */
- #define MAX_TUPLES 200
- /*====================================================================*/
- /* Parameters that can be set with 'insmod' */
- #define INT_MODULE_PARM(n, v) static int n = v; MODULE_PARM(n, "i")
- INT_MODULE_PARM(cis_width, 0); /* 16-bit CIS? */
- /*======================================================================
- Low-level functions to read and write CIS memory. I think the
- write routine is only useful for writing one-byte registers.
-
- ======================================================================*/
- /* Bits in attr field */
- #define IS_ATTR 1
- #define IS_INDIRECT 8
- static int setup_cis_mem(socket_info_t *s);
- static void set_cis_map(socket_info_t *s, pccard_mem_map *mem)
- {
- s->ss_entry->set_mem_map(s->sock, mem);
- if (s->cap.features & SS_CAP_STATIC_MAP) {
- if (s->cis_virt)
- bus_iounmap(s->cap.bus, s->cis_virt);
- s->cis_virt = bus_ioremap(s->cap.bus, mem->sys_start,
- s->cap.map_size);
- }
- }
- void read_cis_mem(socket_info_t *s, int attr, u_int addr,
- u_int len, void *ptr)
- {
- pccard_mem_map *mem = &s->cis_mem;
- u_char *sys, *buf = ptr;
-
- DEBUG(3, "cs: read_cis_mem(%d, %#x, %u)n", attr, addr, len);
- if (setup_cis_mem(s) != 0) {
- memset(ptr, 0xff, len);
- return;
- }
- mem->flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
- if (attr & IS_INDIRECT) {
- /* Indirect accesses use a bunch of special registers at fixed
- locations in common memory */
- u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
- if (attr & IS_ATTR) { addr *= 2; flags = ICTRL0_AUTOINC; }
- mem->card_start = 0; mem->flags = MAP_ACTIVE;
- set_cis_map(s, mem);
- sys = s->cis_virt;
- bus_writeb(s->cap.bus, flags, sys+CISREG_ICTRL0);
- bus_writeb(s->cap.bus, addr & 0xff, sys+CISREG_IADDR0);
- bus_writeb(s->cap.bus, (addr>>8) & 0xff, sys+CISREG_IADDR1);
- bus_writeb(s->cap.bus, (addr>>16) & 0xff, sys+CISREG_IADDR2);
- bus_writeb(s->cap.bus, (addr>>24) & 0xff, sys+CISREG_IADDR3);
- for ( ; len > 0; len--, buf++)
- *buf = bus_readb(s->cap.bus, sys+CISREG_IDATA0);
- } else {
- u_int inc = 1;
- if (attr) { mem->flags |= MAP_ATTRIB; inc++; addr *= 2; }
- sys += (addr & (s->cap.map_size-1));
- mem->card_start = addr & ~(s->cap.map_size-1);
- while (len) {
- set_cis_map(s, mem);
- sys = s->cis_virt + (addr & (s->cap.map_size-1));
- for ( ; len > 0; len--, buf++, sys += inc) {
- if (sys == s->cis_virt+s->cap.map_size) break;
- *buf = bus_readb(s->cap.bus, sys);
- }
- mem->card_start += s->cap.map_size;
- addr = 0;
- }
- }
- DEBUG(3, "cs: %#2.2x %#2.2x %#2.2x %#2.2x ...n",
- *(u_char *)(ptr+0), *(u_char *)(ptr+1),
- *(u_char *)(ptr+2), *(u_char *)(ptr+3));
- }
- void write_cis_mem(socket_info_t *s, int attr, u_int addr,
- u_int len, void *ptr)
- {
- pccard_mem_map *mem = &s->cis_mem;
- u_char *sys, *buf = ptr;
-
- DEBUG(3, "cs: write_cis_mem(%d, %#x, %u)n", attr, addr, len);
- if (setup_cis_mem(s) != 0) return;
- mem->flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
- if (attr & IS_INDIRECT) {
- /* Indirect accesses use a bunch of special registers at fixed
- locations in common memory */
- u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
- if (attr & IS_ATTR) { addr *= 2; flags = ICTRL0_AUTOINC; }
- mem->card_start = 0; mem->flags = MAP_ACTIVE;
- set_cis_map(s, mem);
- sys = s->cis_virt;
- bus_writeb(s->cap.bus, flags, sys+CISREG_ICTRL0);
- bus_writeb(s->cap.bus, addr & 0xff, sys+CISREG_IADDR0);
- bus_writeb(s->cap.bus, (addr>>8) & 0xff, sys+CISREG_IADDR1);
- bus_writeb(s->cap.bus, (addr>>16) & 0xff, sys+CISREG_IADDR2);
- bus_writeb(s->cap.bus, (addr>>24) & 0xff, sys+CISREG_IADDR3);
- for ( ; len > 0; len--, buf++)
- bus_writeb(s->cap.bus, *buf, sys+CISREG_IDATA0);
- } else {
- int inc = 1;
- if (attr & IS_ATTR) { mem->flags |= MAP_ATTRIB; inc++; addr *= 2; }
- mem->card_start = addr & ~(s->cap.map_size-1);
- while (len) {
- set_cis_map(s, mem);
- sys = s->cis_virt + (addr & (s->cap.map_size-1));
- for ( ; len > 0; len--, buf++, sys += inc) {
- if (sys == s->cis_virt+s->cap.map_size) break;
- bus_writeb(s->cap.bus, *buf, sys);
- }
- mem->card_start += s->cap.map_size;
- addr = 0;
- }
- }
- }
- /*======================================================================
- This is tricky... when we set up CIS memory, we try to validate
- the memory window space allocations.
-
- ======================================================================*/
- /* Scratch pointer to the socket we use for validation */
- static socket_info_t *vs = NULL;
- /* Validation function for cards with a valid CIS */
- static int cis_readable(u_long base)
- {
- cisinfo_t info1, info2;
- int ret;
- vs->cis_mem.sys_start = base;
- vs->cis_mem.sys_stop = base+vs->cap.map_size-1;
- vs->cis_virt = bus_ioremap(vs->cap.bus, base, vs->cap.map_size);
- ret = pcmcia_validate_cis(vs->clients, &info1);
- /* invalidate mapping and CIS cache */
- bus_iounmap(vs->cap.bus, vs->cis_virt); vs->cis_used = 0;
- if ((ret != 0) || (info1.Chains == 0))
- return 0;
- vs->cis_mem.sys_start = base+vs->cap.map_size;
- vs->cis_mem.sys_stop = base+2*vs->cap.map_size-1;
- vs->cis_virt = bus_ioremap(vs->cap.bus, base+vs->cap.map_size,
- vs->cap.map_size);
- ret = pcmcia_validate_cis(vs->clients, &info2);
- bus_iounmap(vs->cap.bus, vs->cis_virt); vs->cis_used = 0;
- return ((ret == 0) && (info1.Chains == info2.Chains));
- }
- /* Validation function for simple memory cards */
- static int checksum(u_long base)
- {
- int i, a, b, d;
- vs->cis_mem.sys_start = base;
- vs->cis_mem.sys_stop = base+vs->cap.map_size-1;
- vs->cis_virt = bus_ioremap(vs->cap.bus, base, vs->cap.map_size);
- vs->cis_mem.card_start = 0;
- vs->cis_mem.flags = MAP_ACTIVE;
- vs->ss_entry->set_mem_map(vs->sock, &vs->cis_mem);
- /* Don't bother checking every word... */
- a = 0; b = -1;
- for (i = 0; i < vs->cap.map_size; i += 44) {
- d = bus_readl(vs->cap.bus, vs->cis_virt+i);
- a += d; b &= d;
- }
- bus_iounmap(vs->cap.bus, vs->cis_virt);
- return (b == -1) ? -1 : (a>>1);
- }
- static int checksum_match(u_long base)
- {
- int a = checksum(base), b = checksum(base+vs->cap.map_size);
- return ((a == b) && (a >= 0));
- }
- static int setup_cis_mem(socket_info_t *s)
- {
- if (!(s->cap.features & SS_CAP_STATIC_MAP) &&
- (s->cis_mem.sys_start == 0)) {
- int low = !(s->cap.features & SS_CAP_PAGE_REGS);
- vs = s;
- validate_mem(cis_readable, checksum_match, low, s);
- s->cis_mem.sys_start = 0;
- vs = NULL;
- if (find_mem_region(&s->cis_mem.sys_start, s->cap.map_size,
- s->cap.map_size, low, "card services", s)) {
- printk(KERN_NOTICE "cs: unable to map card memory!n");
- return CS_OUT_OF_RESOURCE;
- }
- s->cis_mem.sys_stop = s->cis_mem.sys_start+s->cap.map_size-1;
- s->cis_virt = bus_ioremap(s->cap.bus, s->cis_mem.sys_start,
- s->cap.map_size);
- }
- return 0;
- }
- void release_cis_mem(socket_info_t *s)
- {
- if (s->cis_mem.sys_start != 0) {
- s->cis_mem.flags &= ~MAP_ACTIVE;
- s->ss_entry->set_mem_map(s->sock, &s->cis_mem);
- if (!(s->cap.features & SS_CAP_STATIC_MAP))
- release_mem_resource(s->cis_mem.sys_start, s->cap.map_size);
- bus_iounmap(s->cap.bus, s->cis_virt);
- s->cis_mem.sys_start = 0;
- s->cis_virt = NULL;
- }
- }
- /*======================================================================
- This is a wrapper around read_cis_mem, with the same interface,
- but which caches information, for cards whose CIS may not be
- readable all the time.
-
- ======================================================================*/
- static void read_cis_cache(socket_info_t *s, int attr, u_int addr,
- u_int len, void *ptr)
- {
- int i;
- char *caddr;
- if (s->fake_cis) {
- if (s->fake_cis_len > addr+len)
- memcpy(ptr, s->fake_cis+addr, len);
- else
- memset(ptr, 0xff, len);
- return;
- }
- caddr = s->cis_cache;
- for (i = 0; i < s->cis_used; i++) {
- if ((s->cis_table[i].addr == addr) &&
- (s->cis_table[i].len == len) &&
- (s->cis_table[i].attr == attr)) break;
- caddr += s->cis_table[i].len;
- }
- if (i < s->cis_used) {
- memcpy(ptr, caddr, len);
- return;
- }
- #ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS)
- read_cb_mem(s, 0, attr, addr, len, ptr);
- else
- #endif
- read_cis_mem(s, attr, addr, len, ptr);
- /* Copy data into the cache, if there is room */
- if ((i < MAX_CIS_TABLE) &&
- (caddr+len < s->cis_cache+MAX_CIS_DATA)) {
- s->cis_table[i].addr = addr;
- s->cis_table[i].len = len;
- s->cis_table[i].attr = attr;
- s->cis_used++;
- memcpy(caddr, ptr, len);
- }
- }
- /*======================================================================
- This verifies if the CIS of a card matches what is in the CIS
- cache.
-
- ======================================================================*/
- int verify_cis_cache(socket_info_t *s)
- {
- char buf[256], *caddr;
- int i;
-
- caddr = s->cis_cache;
- for (i = 0; i < s->cis_used; i++) {
- #ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS)
- read_cb_mem(s, 0, s->cis_table[i].attr, s->cis_table[i].addr,
- s->cis_table[i].len, buf);
- else
- #endif
- read_cis_mem(s, s->cis_table[i].attr, s->cis_table[i].addr,
- s->cis_table[i].len, buf);
- if (memcmp(buf, caddr, s->cis_table[i].len) != 0)
- break;
- caddr += s->cis_table[i].len;
- }
- return (i < s->cis_used);
- }
- /*======================================================================
- For really bad cards, we provide a facility for uploading a
- replacement CIS.
-
- ======================================================================*/
- int pcmcia_replace_cis(client_handle_t handle, cisdump_t *cis)
- {
- socket_info_t *s;
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
- s = SOCKET(handle);
- if (s->fake_cis != NULL) {
- kfree(s->fake_cis);
- s->fake_cis = NULL;
- }
- if (cis->Length > CISTPL_MAX_CIS_SIZE)
- return CS_BAD_SIZE;
- s->fake_cis = kmalloc(cis->Length, GFP_KERNEL);
- if (s->fake_cis == NULL)
- return CS_OUT_OF_RESOURCE;
- s->fake_cis_len = cis->Length;
- memcpy(s->fake_cis, cis->Data, cis->Length);
- return CS_SUCCESS;
- }
- /*======================================================================
- The high-level CIS tuple services
-
- ======================================================================*/
- typedef struct tuple_flags {
- u_int link_space:4;
- u_int has_link:1;
- u_int mfc_fn:3;
- u_int space:4;
- } tuple_flags;
- #define LINK_SPACE(f) (((tuple_flags *)(&(f)))->link_space)
- #define HAS_LINK(f) (((tuple_flags *)(&(f)))->has_link)
- #define MFC_FN(f) (((tuple_flags *)(&(f)))->mfc_fn)
- #define SPACE(f) (((tuple_flags *)(&(f)))->space)
- int pcmcia_get_next_tuple(client_handle_t handle, tuple_t *tuple);
- int pcmcia_get_first_tuple(client_handle_t handle, tuple_t *tuple)
- {
- socket_info_t *s;
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
- s = SOCKET(handle);
- if (!(s->state & SOCKET_PRESENT))
- return CS_NO_CARD;
- tuple->TupleLink = tuple->Flags = 0;
- #ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS) {
- u_int ptr;
- pcibios_read_config_dword(s->cap.cb_dev->subordinate->number, 0, 0x28, &ptr);
- tuple->CISOffset = ptr & ~7;
- SPACE(tuple->Flags) = (ptr & 7);
- } else
- #endif
- {
- /* Assume presence of a LONGLINK_C to address 0 */
- tuple->CISOffset = tuple->LinkOffset = 0;
- SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
- }
- if (!(s->state & SOCKET_CARDBUS) && (s->functions > 1) &&
- !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
- cisdata_t req = tuple->DesiredTuple;
- tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
- if (pcmcia_get_next_tuple(handle, tuple) == CS_SUCCESS) {
- tuple->DesiredTuple = CISTPL_LINKTARGET;
- if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
- return CS_NO_MORE_ITEMS;
- } else
- tuple->CISOffset = tuple->TupleLink = 0;
- tuple->DesiredTuple = req;
- }
- return pcmcia_get_next_tuple(handle, tuple);
- }
- static int follow_link(socket_info_t *s, tuple_t *tuple)
- {
- u_char link[5];
- u_int ofs;
- if (MFC_FN(tuple->Flags)) {
- /* Get indirect link from the MFC tuple */
- read_cis_cache(s, LINK_SPACE(tuple->Flags),
- tuple->LinkOffset, 5, link);
- ofs = le32_to_cpu(*(u_int *)(link+1));
- SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
- /* Move to the next indirect link */
- tuple->LinkOffset += 5;
- MFC_FN(tuple->Flags)--;
- } else if (HAS_LINK(tuple->Flags)) {
- ofs = tuple->LinkOffset;
- SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
- HAS_LINK(tuple->Flags) = 0;
- } else {
- return -1;
- }
- if (!(s->state & SOCKET_CARDBUS) && SPACE(tuple->Flags)) {
- /* This is ugly, but a common CIS error is to code the long
- link offset incorrectly, so we check the right spot... */
- read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
- if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
- (strncmp(link+2, "CIS", 3) == 0))
- return ofs;
- /* Then, we try the wrong spot... */
- ofs = ofs >> 1;
- }
- read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
- if ((link[0] != CISTPL_LINKTARGET) || (link[1] < 3) ||
- (strncmp(link+2, "CIS", 3) != 0))
- return -1;
- return ofs;
- }
- int pcmcia_get_next_tuple(client_handle_t handle, tuple_t *tuple)
- {
- socket_info_t *s;
- u_char link[2], tmp;
- int ofs, i, attr;
-
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
- s = SOCKET(handle);
- if (!(s->state & SOCKET_PRESENT))
- return CS_NO_CARD;
- link[1] = tuple->TupleLink;
- ofs = tuple->CISOffset + tuple->TupleLink;
- attr = SPACE(tuple->Flags);
- for (i = 0; i < MAX_TUPLES; i++) {
- if (link[1] == 0xff) {
- link[0] = CISTPL_END;
- } else {
- read_cis_cache(s, attr, ofs, 2, link);
- if (link[0] == CISTPL_NULL) {
- ofs++; continue;
- }
- }
-
- /* End of chain? Follow long link if possible */
- if (link[0] == CISTPL_END) {
- if ((ofs = follow_link(s, tuple)) < 0)
- return CS_NO_MORE_ITEMS;
- attr = SPACE(tuple->Flags);
- read_cis_cache(s, attr, ofs, 2, link);
- }
- /* Is this a link tuple? Make a note of it */
- if ((link[0] == CISTPL_LONGLINK_A) ||
- (link[0] == CISTPL_LONGLINK_C) ||
- (link[0] == CISTPL_LONGLINK_MFC) ||
- (link[0] == CISTPL_LINKTARGET) ||
- (link[0] == CISTPL_INDIRECT) ||
- (link[0] == CISTPL_NO_LINK)) {
- switch (link[0]) {
- case CISTPL_LONGLINK_A:
- HAS_LINK(tuple->Flags) = 1;
- LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
- read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
- break;
- case CISTPL_LONGLINK_C:
- HAS_LINK(tuple->Flags) = 1;
- LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
- read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
- break;
- case CISTPL_INDIRECT:
- HAS_LINK(tuple->Flags) = 1;
- LINK_SPACE(tuple->Flags) = IS_ATTR | IS_INDIRECT;
- tuple->LinkOffset = 0;
- break;
- case CISTPL_LONGLINK_MFC:
- tuple->LinkOffset = ofs + 3;
- LINK_SPACE(tuple->Flags) = attr;
- if (handle->Function == BIND_FN_ALL) {
- /* Follow all the MFC links */
- read_cis_cache(s, attr, ofs+2, 1, &tmp);
- MFC_FN(tuple->Flags) = tmp;
- } else {
- /* Follow exactly one of the links */
- MFC_FN(tuple->Flags) = 1;
- tuple->LinkOffset += handle->Function * 5;
- }
- break;
- case CISTPL_NO_LINK:
- HAS_LINK(tuple->Flags) = 0;
- break;
- }
- if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
- (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
- break;
- } else
- if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
- break;
-
- if (link[0] == tuple->DesiredTuple)
- break;
- ofs += link[1] + 2;
- }
- if (i == MAX_TUPLES) {
- DEBUG(1, "cs: overrun in pcmcia_get_next_tuple for socket %dn",
- handle->Socket);
- return CS_NO_MORE_ITEMS;
- }
-
- tuple->TupleCode = link[0];
- tuple->TupleLink = link[1];
- tuple->CISOffset = ofs + 2;
- return CS_SUCCESS;
- }
- /*====================================================================*/
- #define _MIN(a, b) (((a) < (b)) ? (a) : (b))
- int pcmcia_get_tuple_data(client_handle_t handle, tuple_t *tuple)
- {
- socket_info_t *s;
- u_int len;
-
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
- s = SOCKET(handle);
- if (tuple->TupleLink < tuple->TupleOffset)
- return CS_NO_MORE_ITEMS;
- len = tuple->TupleLink - tuple->TupleOffset;
- tuple->TupleDataLen = tuple->TupleLink;
- if (len == 0)
- return CS_SUCCESS;
- read_cis_cache(s, SPACE(tuple->Flags),
- tuple->CISOffset + tuple->TupleOffset,
- _MIN(len, tuple->TupleDataMax), tuple->TupleData);
- return CS_SUCCESS;
- }
- /*======================================================================
- Parsing routines for individual tuples
-
- ======================================================================*/
- static int parse_device(tuple_t *tuple, cistpl_device_t *device)
- {
- int i;
- u_char scale;
- u_char *p, *q;
- p = (u_char *)tuple->TupleData;
- q = p + tuple->TupleDataLen;
- device->ndev = 0;
- for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
-
- if (*p == 0xff) break;
- device->dev[i].type = (*p >> 4);
- device->dev[i].wp = (*p & 0x08) ? 1 : 0;
- switch (*p & 0x07) {
- case 0: device->dev[i].speed = 0; break;
- case 1: device->dev[i].speed = 250; break;
- case 2: device->dev[i].speed = 200; break;
- case 3: device->dev[i].speed = 150; break;
- case 4: device->dev[i].speed = 100; break;
- case 7:
- if (++p == q) return CS_BAD_TUPLE;
- device->dev[i].speed = SPEED_CVT(*p);
- while (*p & 0x80)
- if (++p == q) return CS_BAD_TUPLE;
- break;
- default:
- return CS_BAD_TUPLE;
- }
- if (++p == q) return CS_BAD_TUPLE;
- if (*p == 0xff) break;
- scale = *p & 7;
- if (scale == 7) return CS_BAD_TUPLE;
- device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
- device->ndev++;
- if (++p == q) break;
- }
-
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
- {
- u_char *p;
- if (tuple->TupleDataLen < 5)
- return CS_BAD_TUPLE;
- p = (u_char *)tuple->TupleData;
- csum->addr = tuple->CISOffset+(short)le16_to_cpu(*(u_short *)p)-2;
- csum->len = le16_to_cpu(*(u_short *)(p + 2));
- csum->sum = *(p+4);
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
- {
- if (tuple->TupleDataLen < 4)
- return CS_BAD_TUPLE;
- link->addr = le32_to_cpu(*(u_int *)tuple->TupleData);
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_longlink_mfc(tuple_t *tuple,
- cistpl_longlink_mfc_t *link)
- {
- u_char *p;
- int i;
-
- p = (u_char *)tuple->TupleData;
-
- link->nfn = *p; p++;
- if (tuple->TupleDataLen <= link->nfn*5)
- return CS_BAD_TUPLE;
- for (i = 0; i < link->nfn; i++) {
- link->fn[i].space = *p; p++;
- link->fn[i].addr = le32_to_cpu(*(u_int *)p); p += 4;
- }
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_strings(u_char *p, u_char *q, int max,
- char *s, u_char *ofs, u_char *found)
- {
- int i, j, ns;
- if (p == q) return CS_BAD_TUPLE;
- ns = 0; j = 0;
- for (i = 0; i < max; i++) {
- if (*p == 0xff) break;
- ofs[i] = j;
- ns++;
- for (;;) {
- s[j++] = (*p == 0xff) ? ' ' : *p;
- if ((*p == ' ') || (*p == 0xff)) break;
- if (++p == q) return CS_BAD_TUPLE;
- }
- if ((*p == 0xff) || (++p == q)) break;
- }
- if (found) {
- *found = ns;
- return CS_SUCCESS;
- } else {
- return (ns == max) ? CS_SUCCESS : CS_BAD_TUPLE;
- }
- }
- /*====================================================================*/
- static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
- {
- u_char *p, *q;
-
- p = (u_char *)tuple->TupleData;
- q = p + tuple->TupleDataLen;
-
- vers_1->major = *p; p++;
- vers_1->minor = *p; p++;
- if (p >= q) return CS_BAD_TUPLE;
- return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
- vers_1->str, vers_1->ofs, &vers_1->ns);
- }
- /*====================================================================*/
- static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
- {
- u_char *p, *q;
-
- p = (u_char *)tuple->TupleData;
- q = p + tuple->TupleDataLen;
-
- return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
- altstr->str, altstr->ofs, &altstr->ns);
- }
- /*====================================================================*/
- static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
- {
- u_char *p, *q;
- int nid;
- p = (u_char *)tuple->TupleData;
- q = p + tuple->TupleDataLen;
- for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
- if (p > q-2) break;
- jedec->id[nid].mfr = p[0];
- jedec->id[nid].info = p[1];
- p += 2;
- }
- jedec->nid = nid;
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
- {
- u_short *p;
- if (tuple->TupleDataLen < 4)
- return CS_BAD_TUPLE;
- p = (u_short *)tuple->TupleData;
- m->manf = le16_to_cpu(p[0]);
- m->card = le16_to_cpu(p[1]);
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
- {
- u_char *p;
- if (tuple->TupleDataLen < 2)
- return CS_BAD_TUPLE;
- p = (u_char *)tuple->TupleData;
- f->func = p[0];
- f->sysinit = p[1];
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
- {
- u_char *p;
- int i;
- if (tuple->TupleDataLen < 1)
- return CS_BAD_TUPLE;
- p = (u_char *)tuple->TupleData;
- f->type = p[0];
- for (i = 1; i < tuple->TupleDataLen; i++)
- f->data[i-1] = p[i];
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_config(tuple_t *tuple, cistpl_config_t *config)
- {
- int rasz, rmsz, i;
- u_char *p;
- p = (u_char *)tuple->TupleData;
- rasz = *p & 0x03;
- rmsz = (*p & 0x3c) >> 2;
- if (tuple->TupleDataLen < rasz+rmsz+4)
- return CS_BAD_TUPLE;
- config->last_idx = *(++p);
- p++;
- config->base = 0;
- for (i = 0; i <= rasz; i++)
- config->base += p[i] << (8*i);
- p += rasz+1;
- for (i = 0; i < 4; i++)
- config->rmask[i] = 0;
- for (i = 0; i <= rmsz; i++)
- config->rmask[i>>2] += p[i] << (8*(i%4));
- config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
- return CS_SUCCESS;
- }
- /*======================================================================
- The following routines are all used to parse the nightmarish
- config table entries.
-
- ======================================================================*/
- static u_char *parse_power(u_char *p, u_char *q,
- cistpl_power_t *pwr)
- {
- int i;
- u_int scale;
- if (p == q) return NULL;
- pwr->present = *p;
- pwr->flags = 0;
- p++;
- for (i = 0; i < 7; i++)
- if (pwr->present & (1<<i)) {
- if (p == q) return NULL;
- pwr->param[i] = POWER_CVT(*p);
- scale = POWER_SCALE(*p);
- while (*p & 0x80) {
- if (++p == q) return NULL;
- if ((*p & 0x7f) < 100)
- pwr->param[i] += (*p & 0x7f) * scale / 100;
- else if (*p == 0x7d)
- pwr->flags |= CISTPL_POWER_HIGHZ_OK;
- else if (*p == 0x7e)
- pwr->param[i] = 0;
- else if (*p == 0x7f)
- pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
- else
- return NULL;
- }
- p++;
- }
- return p;
- }
- /*====================================================================*/
- static u_char *parse_timing(u_char *p, u_char *q,
- cistpl_timing_t *timing)
- {
- u_char scale;
- if (p == q) return NULL;
- scale = *p;
- if ((scale & 3) != 3) {
- if (++p == q) return NULL;
- timing->wait = SPEED_CVT(*p);
- timing->waitscale = exponent[scale & 3];
- } else
- timing->wait = 0;
- scale >>= 2;
- if ((scale & 7) != 7) {
- if (++p == q) return NULL;
- timing->ready = SPEED_CVT(*p);
- timing->rdyscale = exponent[scale & 7];
- } else
- timing->ready = 0;
- scale >>= 3;
- if (scale != 7) {
- if (++p == q) return NULL;
- timing->reserved = SPEED_CVT(*p);
- timing->rsvscale = exponent[scale];
- } else
- timing->reserved = 0;
- p++;
- return p;
- }
- /*====================================================================*/
- static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
- {
- int i, j, bsz, lsz;
- if (p == q) return NULL;
- io->flags = *p;
- if (!(*p & 0x80)) {
- io->nwin = 1;
- io->win[0].base = 0;
- io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
- return p+1;
- }
-
- if (++p == q) return NULL;
- io->nwin = (*p & 0x0f) + 1;
- bsz = (*p & 0x30) >> 4;
- if (bsz == 3) bsz++;
- lsz = (*p & 0xc0) >> 6;
- if (lsz == 3) lsz++;
- p++;
-
- for (i = 0; i < io->nwin; i++) {
- io->win[i].base = 0;
- io->win[i].len = 1;
- for (j = 0; j < bsz; j++, p++) {
- if (p == q) return NULL;
- io->win[i].base += *p << (j*8);
- }
- for (j = 0; j < lsz; j++, p++) {
- if (p == q) return NULL;
- io->win[i].len += *p << (j*8);
- }
- }
- return p;
- }
- /*====================================================================*/
- static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
- {
- int i, j, asz, lsz, has_ha;
- u_int len, ca, ha;
- if (p == q) return NULL;
- mem->nwin = (*p & 0x07) + 1;
- lsz = (*p & 0x18) >> 3;
- asz = (*p & 0x60) >> 5;
- has_ha = (*p & 0x80);
- if (++p == q) return NULL;
-
- for (i = 0; i < mem->nwin; i++) {
- len = ca = ha = 0;
- for (j = 0; j < lsz; j++, p++) {
- if (p == q) return NULL;
- len += *p << (j*8);
- }
- for (j = 0; j < asz; j++, p++) {
- if (p == q) return NULL;
- ca += *p << (j*8);
- }
- if (has_ha)
- for (j = 0; j < asz; j++, p++) {
- if (p == q) return NULL;
- ha += *p << (j*8);
- }
- mem->win[i].len = len << 8;
- mem->win[i].card_addr = ca << 8;
- mem->win[i].host_addr = ha << 8;
- }
- return p;
- }
- /*====================================================================*/
- static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
- {
- if (p == q) return NULL;
- irq->IRQInfo1 = *p; p++;
- if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
- if (p+2 > q) return NULL;
- irq->IRQInfo2 = (p[1]<<8) + p[0];
- p += 2;
- }
- return p;
- }
- /*====================================================================*/
- static int parse_cftable_entry(tuple_t *tuple,
- cistpl_cftable_entry_t *entry)
- {
- u_char *p, *q, features;
- p = tuple->TupleData;
- q = p + tuple->TupleDataLen;
- entry->index = *p & 0x3f;
- entry->flags = 0;
- if (*p & 0x40)
- entry->flags |= CISTPL_CFTABLE_DEFAULT;
- if (*p & 0x80) {
- if (++p == q) return CS_BAD_TUPLE;
- if (*p & 0x10)
- entry->flags |= CISTPL_CFTABLE_BVDS;
- if (*p & 0x20)
- entry->flags |= CISTPL_CFTABLE_WP;
- if (*p & 0x40)
- entry->flags |= CISTPL_CFTABLE_RDYBSY;
- if (*p & 0x80)
- entry->flags |= CISTPL_CFTABLE_MWAIT;
- entry->interface = *p & 0x0f;
- } else
- entry->interface = 0;
- /* Process optional features */
- if (++p == q) return CS_BAD_TUPLE;
- features = *p; p++;
- /* Power options */
- if ((features & 3) > 0) {
- p = parse_power(p, q, &entry->vcc);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vcc.present = 0;
- if ((features & 3) > 1) {
- p = parse_power(p, q, &entry->vpp1);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vpp1.present = 0;
- if ((features & 3) > 2) {
- p = parse_power(p, q, &entry->vpp2);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vpp2.present = 0;
- /* Timing options */
- if (features & 0x04) {
- p = parse_timing(p, q, &entry->timing);
- if (p == NULL) return CS_BAD_TUPLE;
- } else {
- entry->timing.wait = 0;
- entry->timing.ready = 0;
- entry->timing.reserved = 0;
- }
-
- /* I/O window options */
- if (features & 0x08) {
- p = parse_io(p, q, &entry->io);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->io.nwin = 0;
-
- /* Interrupt options */
- if (features & 0x10) {
- p = parse_irq(p, q, &entry->irq);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->irq.IRQInfo1 = 0;
- switch (features & 0x60) {
- case 0x00:
- entry->mem.nwin = 0;
- break;
- case 0x20:
- entry->mem.nwin = 1;
- entry->mem.win[0].len = le16_to_cpu(*(u_short *)p) << 8;
- entry->mem.win[0].card_addr = 0;
- entry->mem.win[0].host_addr = 0;
- p += 2;
- if (p > q) return CS_BAD_TUPLE;
- break;
- case 0x40:
- entry->mem.nwin = 1;
- entry->mem.win[0].len = le16_to_cpu(*(u_short *)p) << 8;
- entry->mem.win[0].card_addr =
- le16_to_cpu(*(u_short *)(p+2)) << 8;
- entry->mem.win[0].host_addr = 0;
- p += 4;
- if (p > q) return CS_BAD_TUPLE;
- break;
- case 0x60:
- p = parse_mem(p, q, &entry->mem);
- if (p == NULL) return CS_BAD_TUPLE;
- break;
- }
- /* Misc features */
- if (features & 0x80) {
- if (p == q) return CS_BAD_TUPLE;
- entry->flags |= (*p << 8);
- while (*p & 0x80)
- if (++p == q) return CS_BAD_TUPLE;
- p++;
- }
- entry->subtuples = q-p;
-
- return CS_SUCCESS;
- }
- /*====================================================================*/
- #ifdef CONFIG_CARDBUS
- static int parse_bar(tuple_t *tuple, cistpl_bar_t *bar)
- {
- u_char *p;
- if (tuple->TupleDataLen < 6)
- return CS_BAD_TUPLE;
- p = (u_char *)tuple->TupleData;
- bar->attr = *p;
- p += 2;
- bar->size = le32_to_cpu(*(u_int *)p);
- return CS_SUCCESS;
- }
- static int parse_config_cb(tuple_t *tuple, cistpl_config_t *config)
- {
- u_char *p;
-
- p = (u_char *)tuple->TupleData;
- if ((*p != 3) || (tuple->TupleDataLen < 6))
- return CS_BAD_TUPLE;
- config->last_idx = *(++p);
- p++;
- config->base = le32_to_cpu(*(u_int *)p);
- config->subtuples = tuple->TupleDataLen - 6;
- return CS_SUCCESS;
- }
- static int parse_cftable_entry_cb(tuple_t *tuple,
- cistpl_cftable_entry_cb_t *entry)
- {
- u_char *p, *q, features;
- p = tuple->TupleData;
- q = p + tuple->TupleDataLen;
- entry->index = *p & 0x3f;
- entry->flags = 0;
- if (*p & 0x40)
- entry->flags |= CISTPL_CFTABLE_DEFAULT;
- /* Process optional features */
- if (++p == q) return CS_BAD_TUPLE;
- features = *p; p++;
- /* Power options */
- if ((features & 3) > 0) {
- p = parse_power(p, q, &entry->vcc);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vcc.present = 0;
- if ((features & 3) > 1) {
- p = parse_power(p, q, &entry->vpp1);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vpp1.present = 0;
- if ((features & 3) > 2) {
- p = parse_power(p, q, &entry->vpp2);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->vpp2.present = 0;
- /* I/O window options */
- if (features & 0x08) {
- if (p == q) return CS_BAD_TUPLE;
- entry->io = *p; p++;
- } else
- entry->io = 0;
-
- /* Interrupt options */
- if (features & 0x10) {
- p = parse_irq(p, q, &entry->irq);
- if (p == NULL) return CS_BAD_TUPLE;
- } else
- entry->irq.IRQInfo1 = 0;
- if (features & 0x20) {
- if (p == q) return CS_BAD_TUPLE;
- entry->mem = *p; p++;
- } else
- entry->mem = 0;
- /* Misc features */
- if (features & 0x80) {
- if (p == q) return CS_BAD_TUPLE;
- entry->flags |= (*p << 8);
- if (*p & 0x80) {
- if (++p == q) return CS_BAD_TUPLE;
- entry->flags |= (*p << 16);
- }
- while (*p & 0x80)
- if (++p == q) return CS_BAD_TUPLE;
- p++;
- }
- entry->subtuples = q-p;
-
- return CS_SUCCESS;
- }
- #endif
- /*====================================================================*/
- static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
- {
- u_char *p, *q;
- int n;
- p = (u_char *)tuple->TupleData;
- q = p + tuple->TupleDataLen;
- for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
- if (p > q-6) break;
- geo->geo[n].buswidth = p[0];
- geo->geo[n].erase_block = 1 << (p[1]-1);
- geo->geo[n].read_block = 1 << (p[2]-1);
- geo->geo[n].write_block = 1 << (p[3]-1);
- geo->geo[n].partition = 1 << (p[4]-1);
- geo->geo[n].interleave = 1 << (p[5]-1);
- p += 6;
- }
- geo->ngeo = n;
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
- {
- u_char *p, *q;
- if (tuple->TupleDataLen < 10)
- return CS_BAD_TUPLE;
-
- p = tuple->TupleData;
- q = p + tuple->TupleDataLen;
- v2->vers = p[0];
- v2->comply = p[1];
- v2->dindex = le16_to_cpu(*(u_short *)(p+2));
- v2->vspec8 = p[6];
- v2->vspec9 = p[7];
- v2->nhdr = p[8];
- p += 9;
- return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
- }
- /*====================================================================*/
- static int parse_org(tuple_t *tuple, cistpl_org_t *org)
- {
- u_char *p, *q;
- int i;
-
- p = tuple->TupleData;
- q = p + tuple->TupleDataLen;
- if (p == q) return CS_BAD_TUPLE;
- org->data_org = *p;
- if (++p == q) return CS_BAD_TUPLE;
- for (i = 0; i < 30; i++) {
- org->desc[i] = *p;
- if (*p == ' ') break;
- if (++p == q) return CS_BAD_TUPLE;
- }
- return CS_SUCCESS;
- }
- /*====================================================================*/
- static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
- {
- u_char *p;
- if (tuple->TupleDataLen < 10)
- return CS_BAD_TUPLE;
- p = tuple->TupleData;
- fmt->type = p[0];
- fmt->edc = p[1];
- fmt->offset = le32_to_cpu(*(u_int *)(p+2));
- fmt->length = le32_to_cpu(*(u_int *)(p+6));
- return CS_SUCCESS;
- }
- /*====================================================================*/
- int pcmcia_parse_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
- {
- int ret = CS_SUCCESS;
-
- if (tuple->TupleDataLen > tuple->TupleDataMax)
- return CS_BAD_TUPLE;
- switch (tuple->TupleCode) {
- case CISTPL_DEVICE:
- case CISTPL_DEVICE_A:
- ret = parse_device(tuple, &parse->device);
- break;
- #ifdef CONFIG_CARDBUS
- case CISTPL_BAR:
- ret = parse_bar(tuple, &parse->bar);
- break;
- case CISTPL_CONFIG_CB:
- ret = parse_config_cb(tuple, &parse->config);
- break;
- case CISTPL_CFTABLE_ENTRY_CB:
- ret = parse_cftable_entry_cb(tuple, &parse->cftable_entry_cb);
- break;
- #endif
- case CISTPL_CHECKSUM:
- ret = parse_checksum(tuple, &parse->checksum);
- break;
- case CISTPL_LONGLINK_A:
- case CISTPL_LONGLINK_C:
- ret = parse_longlink(tuple, &parse->longlink);
- break;
- case CISTPL_LONGLINK_MFC:
- ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
- break;
- case CISTPL_VERS_1:
- ret = parse_vers_1(tuple, &parse->version_1);
- break;
- case CISTPL_ALTSTR:
- ret = parse_altstr(tuple, &parse->altstr);
- break;
- case CISTPL_JEDEC_A:
- case CISTPL_JEDEC_C:
- ret = parse_jedec(tuple, &parse->jedec);
- break;
- case CISTPL_MANFID:
- ret = parse_manfid(tuple, &parse->manfid);
- break;
- case CISTPL_FUNCID:
- ret = parse_funcid(tuple, &parse->funcid);
- break;
- case CISTPL_FUNCE:
- ret = parse_funce(tuple, &parse->funce);
- break;
- case CISTPL_CONFIG:
- ret = parse_config(tuple, &parse->config);
- break;
- case CISTPL_CFTABLE_ENTRY:
- ret = parse_cftable_entry(tuple, &parse->cftable_entry);
- break;
- case CISTPL_DEVICE_GEO:
- case CISTPL_DEVICE_GEO_A:
- ret = parse_device_geo(tuple, &parse->device_geo);
- break;
- case CISTPL_VERS_2:
- ret = parse_vers_2(tuple, &parse->vers_2);
- break;
- case CISTPL_ORG:
- ret = parse_org(tuple, &parse->org);
- break;
- case CISTPL_FORMAT:
- case CISTPL_FORMAT_A:
- ret = parse_format(tuple, &parse->format);
- break;
- case CISTPL_NO_LINK:
- case CISTPL_LINKTARGET:
- ret = CS_SUCCESS;
- break;
- default:
- ret = CS_UNSUPPORTED_FUNCTION;
- break;
- }
- return ret;
- }
- /*======================================================================
- This is used internally by Card Services to look up CIS stuff.
-
- ======================================================================*/
- int read_tuple(client_handle_t handle, cisdata_t code, void *parse)
- {
- tuple_t tuple;
- cisdata_t buf[255];
- int ret;
-
- tuple.DesiredTuple = code;
- tuple.Attributes = TUPLE_RETURN_COMMON;
- ret = pcmcia_get_first_tuple(handle, &tuple);
- if (ret != CS_SUCCESS) return ret;
- tuple.TupleData = buf;
- tuple.TupleOffset = 0;
- tuple.TupleDataMax = sizeof(buf);
- ret = pcmcia_get_tuple_data(handle, &tuple);
- if (ret != CS_SUCCESS) return ret;
- ret = pcmcia_parse_tuple(handle, &tuple, parse);
- return ret;
- }
- /*======================================================================
- This tries to determine if a card has a sensible CIS. It returns
- the number of tuples in the CIS, or 0 if the CIS looks bad. The
- checks include making sure several critical tuples are present and
- valid; seeing if the total number of tuples is reasonable; and
- looking for tuples that use reserved codes.
-
- ======================================================================*/
- int pcmcia_validate_cis(client_handle_t handle, cisinfo_t *info)
- {
- tuple_t tuple;
- cisparse_t p;
- int ret, reserved, dev_ok = 0, ident_ok = 0;
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
- info->Chains = reserved = 0;
- tuple.DesiredTuple = RETURN_FIRST_TUPLE;
- tuple.Attributes = TUPLE_RETURN_COMMON;
- ret = pcmcia_get_first_tuple(handle, &tuple);
- if (ret != CS_SUCCESS)
- return CS_SUCCESS;
- /* First tuple should be DEVICE; we should really have either that
- or a CFTABLE_ENTRY of some sort */
- if ((tuple.TupleCode == CISTPL_DEVICE) ||
- (read_tuple(handle, CISTPL_CFTABLE_ENTRY, &p) == CS_SUCCESS) ||
- (read_tuple(handle, CISTPL_CFTABLE_ENTRY_CB, &p) == CS_SUCCESS))
- dev_ok++;
- /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
- tuple, for card identification. Certain old D-Link and Linksys
- cards have only a broken VERS_2 tuple; hence the bogus test. */
- if ((read_tuple(handle, CISTPL_MANFID, &p) == CS_SUCCESS) ||
- (read_tuple(handle, CISTPL_VERS_1, &p) == CS_SUCCESS) ||
- (read_tuple(handle, CISTPL_VERS_2, &p) != CS_NO_MORE_ITEMS))
- ident_ok++;
- if (!dev_ok && !ident_ok)
- return CS_SUCCESS;
- for (info->Chains = 1; info->Chains < MAX_TUPLES; info->Chains++) {
- ret = pcmcia_get_next_tuple(handle, &tuple);
- if (ret != CS_SUCCESS) break;
- if (((tuple.TupleCode > 0x23) && (tuple.TupleCode < 0x40)) ||
- ((tuple.TupleCode > 0x47) && (tuple.TupleCode < 0x80)) ||
- ((tuple.TupleCode > 0x90) && (tuple.TupleCode < 0xff)))
- reserved++;
- }
- if ((info->Chains == MAX_TUPLES) || (reserved > 5) ||
- ((!dev_ok || !ident_ok) && (info->Chains > 10)))
- info->Chains = 0;
- return CS_SUCCESS;
- }