sdio: split up common and function CIS parsing

Add a more clean separation between global, common CIS information
and the function specific one as we need the common information in
places where no specific function is specified.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2007-07-30 15:15:30 +02:00
parent b1538bcf75
commit 1a632f8cdc
7 changed files with 206 additions and 27 deletions

View file

@ -19,6 +19,7 @@
#include "sysfs.h"
#include "core.h"
#include "sdio_cis.h"
#include "bus.h"
#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
@ -181,6 +182,8 @@ static void mmc_release_card(struct device *dev)
{
struct mmc_card *card = dev_to_mmc_card(dev);
sdio_free_common_cis(card);
kfree(card);
}

View file

@ -66,7 +66,7 @@ static int sdio_init_func(struct mmc_card *card, unsigned int fn)
if (ret)
goto fail;
ret = sdio_read_cis(func);
ret = sdio_read_func_cis(func);
if (ret)
goto fail;
@ -286,6 +286,13 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
if (err)
goto remove;
/*
* Read the common CIS tuples.
*/
err = sdio_read_common_cis(card);
if (err)
goto remove;
/*
* Initialize (but don't add) all present functions.
*/

View file

@ -95,7 +95,7 @@ static void sdio_release_func(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
sdio_free_cis(func);
sdio_free_func_cis(func);
kfree(func);
}

View file

@ -16,60 +16,152 @@
#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_manfid(struct sdio_func *func,
const unsigned char *buf,
unsigned size)
static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
const unsigned char *buf, unsigned size)
{
unsigned int vendor, device;
/* TPLMID_MANF */
func->vendor = buf[0] | (buf[1] << 8);
vendor = buf[0] | (buf[1] << 8);
/* TPLMID_CARD */
func->device = buf[2] | (buf[3] << 8);
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 };
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;
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->blksize = buf[12] | (buf[13] << 8);
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) {
printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u "
"type %u\n", mmc_hostname(card->host), size, buf[0]);
return ret;
}
return 0;
}
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;
int (*parse)(struct sdio_func *, const unsigned char *buf, unsigned 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 */ },
{ 0x22, 0, cistpl_funce },
};
int sdio_read_cis(struct sdio_func *func)
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;
ret = mmc_io_rw_direct(func->card, 0, 0,
func->num * 0x100 + SDIO_FBR_CIS + i, 0, &x);
unsigned char x, fn;
if (func)
fn = func->num;
else
fn = 0;
ret = mmc_io_rw_direct(card, 0, 0,
fn * 0x100 + SDIO_FBR_CIS + i, 0, &x);
if (ret)
return ret;
ptr |= x << (i * 8);
}
/* find the list tail */
for (prev = &func->tuples; *prev; prev = &(*prev)->next);
if (func)
prev = &func->tuples;
else
prev = &card->tuples;
BUG_ON(*prev);
do {
unsigned char tpl_code, tpl_link;
ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_code);
ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
if (ret)
break;
@ -77,7 +169,7 @@ int sdio_read_cis(struct sdio_func *func)
if (tpl_code == 0xff)
break;
ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_link);
ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
if (ret)
break;
@ -86,7 +178,7 @@ int sdio_read_cis(struct sdio_func *func)
return -ENOMEM;
for (i = 0; i < tpl_link; i++) {
ret = mmc_io_rw_direct(func->card, 0, 0,
ret = mmc_io_rw_direct(card, 0, 0,
ptr + i, 0, &this->data[i]);
if (ret)
break;
@ -108,30 +200,45 @@ int sdio_read_cis(struct sdio_func *func)
prev = &this->next;
printk(KERN_DEBUG
"%s: queuing CIS tuple 0x%02x length %u\n",
sdio_func_id(func), tpl_code, tpl_link);
mmc_hostname(card->host), tpl_code, tpl_link);
} else {
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",
sdio_func_id(func), tpl_code, tpl_link, tpl->min_size);
mmc_hostname(card->host),
tpl_code, tpl_link, tpl->min_size);
ret = -EINVAL;
} else if (tpl->parse)
ret = tpl->parse(func, this->data, tpl_link);
} else if (tpl->parse) {
ret = tpl->parse(card, func,
this->data, tpl_link);
}
kfree(this);
}
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;
}
void sdio_free_cis(struct sdio_func *func)
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 = func->tuples;
tuple = card->tuples;
while (tuple) {
victim = tuple;
@ -139,6 +246,53 @@ void sdio_free_cis(struct sdio_func *func)
kfree(victim);
}
func->tuples = NULL;
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);
}

View file

@ -14,7 +14,10 @@
#ifndef _MMC_SDIO_CIS_H
#define _MMC_SDIO_CIS_H
int sdio_read_cis(struct sdio_func *func);
void sdio_free_cis(struct sdio_func *func);
int sdio_read_common_cis(struct mmc_card *card);
void sdio_free_common_cis(struct mmc_card *card);
int sdio_read_func_cis(struct sdio_func *func);
void sdio_free_func_cis(struct sdio_func *func);
#endif

View file

@ -65,8 +65,16 @@ struct sdio_cccr {
high_speed:1;
};
struct sdio_cis {
unsigned short vendor;
unsigned short device;
unsigned short blksize;
unsigned int max_dtr;
};
struct mmc_host;
struct sdio_func;
struct sdio_func_tuple;
#define SDIO_MAX_FUNCS 7
@ -98,7 +106,9 @@ struct mmc_card {
unsigned int sdio_funcs; /* number of SDIO functions */
struct sdio_cccr cccr; /* common card info */
struct sdio_cis cis; /* common tuple info */
struct sdio_func *sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */
struct sdio_func_tuple *tuples; /* unknown common tuples */
};
#define mmc_card_mmc(c) ((c)->type == MMC_TYPE_MMC)

View file

@ -36,6 +36,8 @@ struct sdio_func {
unsigned short vendor; /* vendor id */
unsigned short device; /* device id */
unsigned short blksize; /* maximum block size */
unsigned int state; /* function state */
#define SDIO_STATE_PRESENT (1<<0) /* present in sysfs */