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/*
* linux/drivers/mmc/core/sdio_cis.c
*
* Author: Nicolas Pitre
* Created: June 11, 2007
* Copyright: MontaVista Software Inc.
*
* 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/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)
{
/* TPLMID_MANF */
func->vendor = buf[0] | (buf[1] << 8);
/* TPLMID_CARD */
func->device = buf[2] | (buf[3] << 8);
return 0;
}
struct cis_tpl {
unsigned char code;
unsigned char min_size;
int (*parse)(struct sdio_func *, const unsigned char *buf, unsigned size);
};
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 */ },
};
int sdio_read_cis(struct sdio_func *func)
{
int ret;
unsigned char *buf;
unsigned i, ptr = 0;
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);
if (ret)
return ret;
ptr |= x << (i * 8);
}
buf = kmalloc(256, GFP_KERNEL);
if (!buf)
return -ENOMEM;
do {
unsigned char tpl_code, tpl_link;
const struct cis_tpl *tpl;
ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_code);
if (ret)
break;
/* 0xff means we're done */
if (tpl_code == 0xff)
break;
ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_link);
if (ret)
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)) {
printk(KERN_WARNING
"%s: unknown CIS tuple 0x%02x of length %u\n",
sdio_func_id(func), tpl_code, tpl_link);
ptr += tpl_link;
continue;
}
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);
ret = -EINVAL;
break;
}
for (i = 0; i < tpl_link; i++) {
ret = mmc_io_rw_direct(func->card, 0, 0, ptr + i, 0, &buf[i]);
if (ret)
break;
}
if (ret)
break;
ptr += tpl_link;
if (tpl->parse)
ret = tpl->parse(func, buf, tpl_link);
} while (!ret);
kfree(buf);
return ret;
}
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