![David Vrabel](/assets/img/avatar_default.png)
The PC Card 8.0 specification (vol. 4, section 3.2.10) says the TPLLV1_INFO field of the CISTPL_VERS_1 tuple must contain 4 strings. Some cards don't have all 4 so just parse as many as we can. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Vrabel <david.vrabel@csr.com> Tested-by: Jonathan Cameron <jic23@cam.ac.uk> Tested-by: Bing Zhao <bzhao@marvell.com> Cc: Roel Kluin <roel.kluin@gmail.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
393 lines
8.4 KiB
C
393 lines
8.4 KiB
C
/*
|
|
* linux/drivers/mmc/core/sdio_cis.c
|
|
*
|
|
* Author: Nicolas Pitre
|
|
* Created: June 11, 2007
|
|
* Copyright: MontaVista Software Inc.
|
|
*
|
|
* Copyright 2007 Pierre Ossman
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mmc/card.h>
|
|
#include <linux/mmc/sdio.h>
|
|
#include <linux/mmc/sdio_func.h>
|
|
|
|
#include "sdio_cis.h"
|
|
#include "sdio_ops.h"
|
|
|
|
static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
|
|
const unsigned char *buf, unsigned size)
|
|
{
|
|
unsigned i, nr_strings;
|
|
char **buffer, *string;
|
|
|
|
/* Find all null-terminated (including zero length) strings in
|
|
the TPLLV1_INFO field. Trailing garbage is ignored. */
|
|
buf += 2;
|
|
size -= 2;
|
|
|
|
nr_strings = 0;
|
|
for (i = 0; i < size; i++) {
|
|
if (buf[i] == 0xff)
|
|
break;
|
|
if (buf[i] == 0)
|
|
nr_strings++;
|
|
}
|
|
if (nr_strings == 0)
|
|
return 0;
|
|
|
|
size = i;
|
|
|
|
buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
string = (char*)(buffer + nr_strings);
|
|
|
|
for (i = 0; i < nr_strings; i++) {
|
|
buffer[i] = string;
|
|
strcpy(string, buf);
|
|
string += strlen(string) + 1;
|
|
buf += strlen(buf) + 1;
|
|
}
|
|
|
|
if (func) {
|
|
func->num_info = nr_strings;
|
|
func->info = (const char**)buffer;
|
|
} else {
|
|
card->num_info = nr_strings;
|
|
card->info = (const char**)buffer;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
|
|
const unsigned char *buf, unsigned size)
|
|
{
|
|
unsigned int vendor, device;
|
|
|
|
/* TPLMID_MANF */
|
|
vendor = buf[0] | (buf[1] << 8);
|
|
|
|
/* TPLMID_CARD */
|
|
device = buf[2] | (buf[3] << 8);
|
|
|
|
if (func) {
|
|
func->vendor = vendor;
|
|
func->device = device;
|
|
} else {
|
|
card->cis.vendor = vendor;
|
|
card->cis.device = device;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const unsigned char speed_val[16] =
|
|
{ 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
|
|
static const unsigned int speed_unit[8] =
|
|
{ 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
|
|
|
|
/* FUNCE tuples with these types get passed to SDIO drivers */
|
|
static const unsigned char funce_type_whitelist[] = {
|
|
4 /* CISTPL_FUNCE_LAN_NODE_ID used in Broadcom cards */
|
|
};
|
|
|
|
static int cistpl_funce_whitelisted(unsigned char type)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(funce_type_whitelist); i++) {
|
|
if (funce_type_whitelist[i] == type)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cistpl_funce_common(struct mmc_card *card,
|
|
const unsigned char *buf, unsigned size)
|
|
{
|
|
if (size < 0x04 || buf[0] != 0)
|
|
return -EINVAL;
|
|
|
|
/* TPLFE_FN0_BLK_SIZE */
|
|
card->cis.blksize = buf[1] | (buf[2] << 8);
|
|
|
|
/* TPLFE_MAX_TRAN_SPEED */
|
|
card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
|
|
speed_unit[buf[3] & 7];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cistpl_funce_func(struct sdio_func *func,
|
|
const unsigned char *buf, unsigned size)
|
|
{
|
|
unsigned vsn;
|
|
unsigned min_size;
|
|
|
|
/* let SDIO drivers take care of whitelisted FUNCE tuples */
|
|
if (cistpl_funce_whitelisted(buf[0]))
|
|
return -EILSEQ;
|
|
|
|
vsn = func->card->cccr.sdio_vsn;
|
|
min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
|
|
|
|
if (size < min_size || buf[0] != 1)
|
|
return -EINVAL;
|
|
|
|
/* TPLFE_MAX_BLK_SIZE */
|
|
func->max_blksize = buf[12] | (buf[13] << 8);
|
|
|
|
/* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
|
|
if (vsn > SDIO_SDIO_REV_1_00)
|
|
func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
|
|
else
|
|
func->enable_timeout = jiffies_to_msecs(HZ);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
|
|
const unsigned char *buf, unsigned size)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* There should be two versions of the CISTPL_FUNCE tuple,
|
|
* one for the common CIS (function 0) and a version used by
|
|
* the individual function's CIS (1-7). Yet, the later has a
|
|
* different length depending on the SDIO spec version.
|
|
*/
|
|
if (func)
|
|
ret = cistpl_funce_func(func, buf, size);
|
|
else
|
|
ret = cistpl_funce_common(card, buf, size);
|
|
|
|
if (ret && ret != -EILSEQ) {
|
|
printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u "
|
|
"type %u\n", mmc_hostname(card->host), size, buf[0]);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
|
|
const unsigned char *, unsigned);
|
|
|
|
struct cis_tpl {
|
|
unsigned char code;
|
|
unsigned char min_size;
|
|
tpl_parse_t *parse;
|
|
};
|
|
|
|
static const struct cis_tpl cis_tpl_list[] = {
|
|
{ 0x15, 3, cistpl_vers_1 },
|
|
{ 0x20, 4, cistpl_manfid },
|
|
{ 0x21, 2, /* cistpl_funcid */ },
|
|
{ 0x22, 0, cistpl_funce },
|
|
};
|
|
|
|
static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
|
|
{
|
|
int ret;
|
|
struct sdio_func_tuple *this, **prev;
|
|
unsigned i, ptr = 0;
|
|
|
|
/*
|
|
* Note that this works for the common CIS (function number 0) as
|
|
* well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
|
|
* have the same offset.
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
unsigned char x, fn;
|
|
|
|
if (func)
|
|
fn = func->num;
|
|
else
|
|
fn = 0;
|
|
|
|
ret = mmc_io_rw_direct(card, 0, 0,
|
|
SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
|
|
if (ret)
|
|
return ret;
|
|
ptr |= x << (i * 8);
|
|
}
|
|
|
|
if (func)
|
|
prev = &func->tuples;
|
|
else
|
|
prev = &card->tuples;
|
|
|
|
BUG_ON(*prev);
|
|
|
|
do {
|
|
unsigned char tpl_code, tpl_link;
|
|
|
|
ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
|
|
if (ret)
|
|
break;
|
|
|
|
/* 0xff means we're done */
|
|
if (tpl_code == 0xff)
|
|
break;
|
|
|
|
/* null entries have no link field or data */
|
|
if (tpl_code == 0x00)
|
|
continue;
|
|
|
|
ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
|
|
if (ret)
|
|
break;
|
|
|
|
/* a size of 0xff also means we're done */
|
|
if (tpl_link == 0xff)
|
|
break;
|
|
|
|
this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
|
|
if (!this)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < tpl_link; i++) {
|
|
ret = mmc_io_rw_direct(card, 0, 0,
|
|
ptr + i, 0, &this->data[i]);
|
|
if (ret)
|
|
break;
|
|
}
|
|
if (ret) {
|
|
kfree(this);
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
|
|
if (cis_tpl_list[i].code == tpl_code)
|
|
break;
|
|
if (i < ARRAY_SIZE(cis_tpl_list)) {
|
|
const struct cis_tpl *tpl = cis_tpl_list + i;
|
|
if (tpl_link < tpl->min_size) {
|
|
printk(KERN_ERR
|
|
"%s: bad CIS tuple 0x%02x"
|
|
" (length = %u, expected >= %u)\n",
|
|
mmc_hostname(card->host),
|
|
tpl_code, tpl_link, tpl->min_size);
|
|
ret = -EINVAL;
|
|
} else if (tpl->parse) {
|
|
ret = tpl->parse(card, func,
|
|
this->data, tpl_link);
|
|
}
|
|
/*
|
|
* We don't need the tuple anymore if it was
|
|
* successfully parsed by the SDIO core or if it is
|
|
* not going to be parsed by SDIO drivers.
|
|
*/
|
|
if (!ret || ret != -EILSEQ)
|
|
kfree(this);
|
|
} else {
|
|
/* unknown tuple */
|
|
ret = -EILSEQ;
|
|
}
|
|
|
|
if (ret == -EILSEQ) {
|
|
/* this tuple is unknown to the core or whitelisted */
|
|
this->next = NULL;
|
|
this->code = tpl_code;
|
|
this->size = tpl_link;
|
|
*prev = this;
|
|
prev = &this->next;
|
|
printk(KERN_DEBUG
|
|
"%s: queuing CIS tuple 0x%02x length %u\n",
|
|
mmc_hostname(card->host), tpl_code, tpl_link);
|
|
/* keep on analyzing tuples */
|
|
ret = 0;
|
|
}
|
|
|
|
ptr += tpl_link;
|
|
} while (!ret);
|
|
|
|
/*
|
|
* Link in all unknown tuples found in the common CIS so that
|
|
* drivers don't have to go digging in two places.
|
|
*/
|
|
if (func)
|
|
*prev = card->tuples;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int sdio_read_common_cis(struct mmc_card *card)
|
|
{
|
|
return sdio_read_cis(card, NULL);
|
|
}
|
|
|
|
void sdio_free_common_cis(struct mmc_card *card)
|
|
{
|
|
struct sdio_func_tuple *tuple, *victim;
|
|
|
|
tuple = card->tuples;
|
|
|
|
while (tuple) {
|
|
victim = tuple;
|
|
tuple = tuple->next;
|
|
kfree(victim);
|
|
}
|
|
|
|
card->tuples = NULL;
|
|
}
|
|
|
|
int sdio_read_func_cis(struct sdio_func *func)
|
|
{
|
|
int ret;
|
|
|
|
ret = sdio_read_cis(func->card, func);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Since we've linked to tuples in the card structure,
|
|
* we must make sure we have a reference to it.
|
|
*/
|
|
get_device(&func->card->dev);
|
|
|
|
/*
|
|
* Vendor/device id is optional for function CIS, so
|
|
* copy it from the card structure as needed.
|
|
*/
|
|
if (func->vendor == 0) {
|
|
func->vendor = func->card->cis.vendor;
|
|
func->device = func->card->cis.device;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void sdio_free_func_cis(struct sdio_func *func)
|
|
{
|
|
struct sdio_func_tuple *tuple, *victim;
|
|
|
|
tuple = func->tuples;
|
|
|
|
while (tuple && tuple != func->card->tuples) {
|
|
victim = tuple;
|
|
tuple = tuple->next;
|
|
kfree(victim);
|
|
}
|
|
|
|
func->tuples = NULL;
|
|
|
|
/*
|
|
* We have now removed the link to the tuples in the
|
|
* card structure, so remove the reference.
|
|
*/
|
|
put_device(&func->card->dev);
|
|
}
|
|
|