sdio: initial CIS parsing code (b7261261) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/mmc/core/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -10,5 +10,5 @@ obj-$(CONFIG_MMC) += mmc_core.o
		mmc_core-y := core.o sysfs.o bus.o host.o \
		mmc.o mmc_ops.o sd.o sd_ops.o \
		sdio.o sdio_ops.o sdio_bus.o \
		sdio_io.o
		sdio_cis.o sdio_io.o

drivers/mmc/core/sdio.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@
		#include "mmc_ops.h"
		#include "sd_ops.h"
		#include "sdio_ops.h"
		#include "sdio_cis.h"

		static int sdio_read_fbr(struct sdio_func *func)
		{
		@@ -65,6 +66,10 @@ static int sdio_init_func(struct mmc_card *card, unsigned int fn)
		if (ret)
		goto fail;

		ret = sdio_read_cis(func);
		if (ret)
		goto fail;

		card->sdio_func[fn - 1] = func;

		return 0;

drivers/mmc/core/sdio_cis.c

0 → 100644

+119 −0

Original line number	Diff line number	Diff line
		/*
		* 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;
		}

drivers/mmc/core/sdio_cis.h

0 → 100644

+19 −0

Original line number	Diff line number	Diff line
		/*
		* linux/drivers/mmc/core/sdio_cis.h
		*
		* 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.
		*/

		#ifndef _MMC_SDIO_CIS_H
		#define _MMC_SDIO_CIS_H

		int sdio_read_cis(struct sdio_func *func);

		#endif