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- /*
- * 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/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;
- struct sdio_func_tuple *this, **prev;
- 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);
- }
- /* find the list tail */
- for (prev = &func->tuples; *prev; prev = &(*prev)->next);
- do {
- unsigned char tpl_code, tpl_link;
- 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;
- this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
- if (!this)
- return -ENOMEM;
- for (i = 0; i < tpl_link; i++) {
- ret = mmc_io_rw_direct(func->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)) {
- /* this tuple is unknown to the core */
- 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",
- sdio_func_id(func), 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);
- ret = -EINVAL;
- } else if (tpl->parse)
- ret = tpl->parse(func, this->data, tpl_link);
- kfree(this);
- }
- ptr += tpl_link;
- } while (!ret);
- return ret;
- }
- void sdio_free_cis(struct sdio_func *func)
- {
- struct sdio_func_tuple *tuple, *victim;
- tuple = func->tuples;
- while (tuple) {
- victim = tuple;
- tuple = tuple->next;
- kfree(victim);
- }
- func->tuples = NULL;
- }
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