120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
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/*
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* linux/drivers/mmc/core/sdio_cis.c
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*
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* Author: Nicolas Pitre
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* Created: June 11, 2007
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* Copyright: MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sdio.h>
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#include <linux/mmc/sdio_func.h>
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#include "sdio_cis.h"
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#include "sdio_ops.h"
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static int cistpl_manfid(struct sdio_func *func,
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const unsigned char *buf,
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unsigned size)
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{
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/* TPLMID_MANF */
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func->vendor = buf[0] | (buf[1] << 8);
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/* TPLMID_CARD */
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func->device = buf[2] | (buf[3] << 8);
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return 0;
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}
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struct cis_tpl {
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unsigned char code;
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unsigned char min_size;
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int (*parse)(struct sdio_func *, const unsigned char *buf, unsigned size);
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};
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static const struct cis_tpl cis_tpl_list[] = {
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{ 0x15, 3, /* cistpl_vers_1 */ },
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{ 0x20, 4, cistpl_manfid },
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{ 0x21, 2, /* cistpl_funcid */ },
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{ 0x22, 0, /* cistpl_funce */ },
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};
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int sdio_read_cis(struct sdio_func *func)
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{
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int ret;
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unsigned char *buf;
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unsigned i, ptr = 0;
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for (i = 0; i < 3; i++) {
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unsigned char x;
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ret = mmc_io_rw_direct(func->card, 0, 0,
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func->num * 0x100 + SDIO_FBR_CIS + i, 0, &x);
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if (ret)
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return ret;
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ptr |= x << (i * 8);
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}
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buf = kmalloc(256, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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do {
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unsigned char tpl_code, tpl_link;
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const struct cis_tpl *tpl;
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ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_code);
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if (ret)
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break;
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/* 0xff means we're done */
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if (tpl_code == 0xff)
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break;
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ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_link);
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if (ret)
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break;
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for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
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if (cis_tpl_list[i].code == tpl_code)
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break;
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if (i >= ARRAY_SIZE(cis_tpl_list)) {
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printk(KERN_WARNING
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"%s: unknown CIS tuple 0x%02x of length %u\n",
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sdio_func_id(func), tpl_code, tpl_link);
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ptr += tpl_link;
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continue;
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}
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tpl = cis_tpl_list + i;
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if (tpl_link < tpl->min_size) {
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printk(KERN_ERR
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"%s: bad CIS tuple 0x%02x (length = %u, expected >= %u\n",
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sdio_func_id(func), tpl_code, tpl_link, tpl->min_size);
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ret = -EINVAL;
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break;
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}
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for (i = 0; i < tpl_link; i++) {
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ret = mmc_io_rw_direct(func->card, 0, 0, ptr + i, 0, &buf[i]);
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if (ret)
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break;
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}
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if (ret)
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break;
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ptr += tpl_link;
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if (tpl->parse)
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ret = tpl->parse(func, buf, tpl_link);
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} while (!ret);
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kfree(buf);
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return ret;
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}
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