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/* $OpenBSD: sdmmc_cis.c,v 1.6 2016/01/11 07:32:38 kettenis Exp $ */
/*
* Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* Routines to decode the Card Information Structure of SD I/O cards */
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <dev/sdmmc/sdmmc_ioreg.h>
#include <dev/sdmmc/sdmmcdevs.h>
#include <dev/sdmmc/sdmmcvar.h>
u_int32_t sdmmc_cisptr(struct sdmmc_function *);
#ifdef SDMMC_DEBUG
#define DPRINTF(s) printf s
#else
#define DPRINTF(s) /**/
#endif
u_int32_t
sdmmc_cisptr(struct sdmmc_function *sf)
{
u_int32_t cisptr = 0;
rw_assert_wrlock(&sf->sc->sc_lock);
/* XXX where is the per-function CIS pointer register? */
if (sf->number != 0)
return SD_IO_CIS_START;
/* XXX is the CIS pointer stored in little-endian format? */
cisptr |= sdmmc_io_read_1(sf, SD_IO_CCCR_CISPTR+0) << 0;
cisptr |= sdmmc_io_read_1(sf, SD_IO_CCCR_CISPTR+1) << 8;
cisptr |= sdmmc_io_read_1(sf, SD_IO_CCCR_CISPTR+2) << 16;
return cisptr;
}
int
sdmmc_read_cis(struct sdmmc_function *sf, struct sdmmc_cis *cis)
{
int reg;
u_int8_t tplcode;
u_int8_t tpllen;
rw_assert_wrlock(&sf->sc->sc_lock);
bzero(cis, sizeof *cis);
/* XXX read per-function CIS */
if (sf->number != 0)
return 1;
reg = (int)sdmmc_cisptr(sf);
if (reg < SD_IO_CIS_START ||
reg >= (SD_IO_CIS_START+SD_IO_CIS_SIZE-16)) {
printf("%s: bad CIS ptr %#x\n", DEVNAME(sf->sc), reg);
return 1;
}
for (;;) {
tplcode = sdmmc_io_read_1(sf, reg++);
if (tplcode == SD_IO_CISTPL_END)
break;
if (tplcode == SD_IO_CISTPL_NULL)
continue;
tpllen = sdmmc_io_read_1(sf, reg++);
if (tpllen == 0) {
printf("%s: CIS parse error at %d, "
"tuple code %#x, length %d\n",
DEVNAME(sf->sc), reg, tplcode, tpllen);
break;
}
switch (tplcode) {
case SD_IO_CISTPL_FUNCID:
if (tpllen < 2) {
printf("%s: bad CISTPL_FUNCID length\n",
DEVNAME(sf->sc));
reg += tpllen;
break;
}
cis->function = sdmmc_io_read_1(sf, reg);
reg += tpllen;
break;
case SD_IO_CISTPL_MANFID:
if (tpllen < 4) {
printf("%s: bad CISTPL_MANFID length\n",
DEVNAME(sf->sc));
reg += tpllen;
break;
}
cis->manufacturer = sdmmc_io_read_1(sf, reg++);
cis->manufacturer |= sdmmc_io_read_1(sf, reg++) << 8;
cis->product = sdmmc_io_read_1(sf, reg++);
cis->product |= sdmmc_io_read_1(sf, reg++) << 8;
break;
case SD_IO_CISTPL_VERS_1:
if (tpllen < 2) {
printf("%s: CISTPL_VERS_1 too short\n",
DEVNAME(sf->sc));
reg += tpllen;
break;
}
{
int start, i, ch, count;
cis->cis1_major = sdmmc_io_read_1(sf, reg++);
cis->cis1_minor = sdmmc_io_read_1(sf, reg++);
for (count = 0, start = 0, i = 0;
(count < 4) && ((i + 4) < 256); i++) {
ch = sdmmc_io_read_1(sf, reg + i);
if (ch == 0xff)
break;
cis->cis1_info_buf[i] = ch;
if (ch == 0) {
cis->cis1_info[count] =
cis->cis1_info_buf + start;
start = i + 1;
count++;
}
}
reg += tpllen - 2;
}
break;
default:
DPRINTF(("%s: unknown tuple code %#x, length %d\n",
DEVNAME(sf->sc), tplcode, tpllen));
reg += tpllen;
break;
}
}
return 0;
}
void
sdmmc_print_cis(struct sdmmc_function *sf)
{
struct sdmmc_cis *cis = &sf->cis;
int i;
printf("%s: CIS version %d.%d\n", DEVNAME(sf->sc),
cis->cis1_major, cis->cis1_minor);
printf("%s: CIS info: ", DEVNAME(sf->sc));
for (i = 0; i < 4; i++) {
if (cis->cis1_info[i] == NULL)
break;
if (i)
printf(", ");
printf("%s", cis->cis1_info[i]);
}
printf("\n");
printf("%s: Manufacturer code 0x%x, product 0x%x\n",
DEVNAME(sf->sc), cis->manufacturer, cis->product);
printf("%s: function %d: ", DEVNAME(sf->sc), sf->number);
switch (sf->cis.function) {
case SDMMC_FUNCTION_WLAN:
printf("wireless network adapter");
break;
default:
printf("unknown (%d)", sf->cis.function);
break;
}
printf("\n");
}
void
sdmmc_check_cis_quirks(struct sdmmc_function *sf)
{
if (sf->cis.manufacturer == SDMMC_VENDOR_SPECTEC &&
sf->cis.product == SDMMC_PRODUCT_SPECTEC_SDW820) {
/* This card lacks the VERS_1 tuple. */
sf->cis.cis1_major = 0x01;
sf->cis.cis1_minor = 0x00;
sf->cis.cis1_info[0] = "Spectec";
sf->cis.cis1_info[1] = "SDIO WLAN Card";
sf->cis.cis1_info[2] = "SDW-820";
sf->cis.cis1_info[3] = "";
}
}
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