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linux/drivers/mmc/card/mmc_test.c

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mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
/*
* linux/drivers/mmc/card/mmc_test.c
*
mmc_test: only bind to supported cards We can only perform the tests on MMC and SD cards, so avoid binding to any other type. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-06-28 17:51:27 +02:00
* Copyright 2007-2008 Pierre Ossman
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
*
* 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/mmc/core.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/scatterlist.h>
#define RESULT_OK 0
#define RESULT_FAIL 1
#define RESULT_UNSUP_HOST 2
#define RESULT_UNSUP_CARD 3
#define BUFFER_SIZE (PAGE_SIZE * 4)
struct mmc_test_card {
struct mmc_card *card;
u8 *buffer;
};
/*******************************************************************/
/* Helper functions */
/*******************************************************************/
static int mmc_test_set_blksize(struct mmc_test_card *test, unsigned size)
{
struct mmc_command cmd;
int ret;
cmd.opcode = MMC_SET_BLOCKLEN;
cmd.arg = size;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
ret = mmc_wait_for_cmd(test->card->host, &cmd, 0);
if (ret)
return ret;
return 0;
}
static int __mmc_test_transfer(struct mmc_test_card *test, int write,
unsigned broken_xfer, u8 *buffer, unsigned addr,
unsigned blocks, unsigned blksz)
{
int ret, busy;
struct mmc_request mrq;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_data data;
struct scatterlist sg;
memset(&mrq, 0, sizeof(struct mmc_request));
mrq.cmd = &cmd;
mrq.data = &data;
memset(&cmd, 0, sizeof(struct mmc_command));
if (broken_xfer) {
if (blocks > 1) {
cmd.opcode = write ?
MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
} else {
cmd.opcode = MMC_SEND_STATUS;
}
} else {
if (blocks > 1) {
cmd.opcode = write ?
MMC_WRITE_MULTIPLE_BLOCK : MMC_READ_MULTIPLE_BLOCK;
} else {
cmd.opcode = write ?
MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
}
}
if (broken_xfer && blocks == 1)
cmd.arg = test->card->rca << 16;
else
cmd.arg = addr;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
memset(&stop, 0, sizeof(struct mmc_command));
if (!broken_xfer && (blocks > 1)) {
stop.opcode = MMC_STOP_TRANSMISSION;
stop.arg = 0;
stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
mrq.stop = &stop;
}
memset(&data, 0, sizeof(struct mmc_data));
data.blksz = blksz;
data.blocks = blocks;
data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, buffer, blocks * blksz);
mmc_set_data_timeout(&data, test->card);
mmc_wait_for_req(test->card->host, &mrq);
ret = 0;
if (broken_xfer) {
if (!ret && cmd.error)
ret = cmd.error;
if (!ret && data.error == 0)
ret = RESULT_FAIL;
if (!ret && data.error != -ETIMEDOUT)
ret = data.error;
if (!ret && stop.error)
ret = stop.error;
if (blocks > 1) {
if (!ret && data.bytes_xfered > blksz)
ret = RESULT_FAIL;
} else {
if (!ret && data.bytes_xfered > 0)
ret = RESULT_FAIL;
}
} else {
if (!ret && cmd.error)
ret = cmd.error;
if (!ret && data.error)
ret = data.error;
if (!ret && stop.error)
ret = stop.error;
if (!ret && data.bytes_xfered != blocks * blksz)
ret = RESULT_FAIL;
}
if (ret == -EINVAL)
ret = RESULT_UNSUP_HOST;
busy = 0;
do {
int ret2;
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_SEND_STATUS;
cmd.arg = test->card->rca << 16;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
ret2 = mmc_wait_for_cmd(test->card->host, &cmd, 0);
if (ret2)
break;
if (!busy && !(cmd.resp[0] & R1_READY_FOR_DATA)) {
busy = 1;
printk(KERN_INFO "%s: Warning: Host did not "
"wait for busy state to end.\n",
mmc_hostname(test->card->host));
}
} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
return ret;
}
static int mmc_test_transfer(struct mmc_test_card *test, int write,
u8 *buffer, unsigned addr, unsigned blocks, unsigned blksz)
{
return __mmc_test_transfer(test, write, 0, buffer,
addr, blocks, blksz);
}
static int mmc_test_prepare_verify(struct mmc_test_card *test, int write)
{
int ret, i;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
if (write)
memset(test->buffer, 0xDF, BUFFER_SIZE);
else {
for (i = 0;i < BUFFER_SIZE;i++)
test->buffer[i] = i;
}
for (i = 0;i < BUFFER_SIZE / 512;i++) {
ret = mmc_test_transfer(test, 1, test->buffer + i * 512,
i * 512, 1, 512);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_prepare_verify_write(struct mmc_test_card *test)
{
return mmc_test_prepare_verify(test, 1);
}
static int mmc_test_prepare_verify_read(struct mmc_test_card *test)
{
return mmc_test_prepare_verify(test, 0);
}
static int mmc_test_verified_transfer(struct mmc_test_card *test, int write,
u8 *buffer, unsigned addr, unsigned blocks, unsigned blksz)
{
int ret, i, sectors;
/*
* It is assumed that the above preparation has been done.
*/
memset(test->buffer, 0, BUFFER_SIZE);
if (write) {
for (i = 0;i < blocks * blksz;i++)
buffer[i] = i;
}
ret = mmc_test_set_blksize(test, blksz);
if (ret)
return ret;
ret = mmc_test_transfer(test, write, buffer, addr, blocks, blksz);
if (ret)
return ret;
if (write) {
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
sectors = (blocks * blksz + 511) / 512;
if ((sectors * 512) == (blocks * blksz))
sectors++;
if ((sectors * 512) > BUFFER_SIZE)
return -EINVAL;
memset(test->buffer, 0, sectors * 512);
for (i = 0;i < sectors;i++) {
ret = mmc_test_transfer(test, 0,
test->buffer + i * 512,
addr + i * 512, 1, 512);
if (ret)
return ret;
}
for (i = 0;i < blocks * blksz;i++) {
if (test->buffer[i] != (u8)i)
return RESULT_FAIL;
}
for (;i < sectors * 512;i++) {
if (test->buffer[i] != 0xDF)
return RESULT_FAIL;
}
} else {
for (i = 0;i < blocks * blksz;i++) {
if (buffer[i] != (u8)i)
return RESULT_FAIL;
}
}
return 0;
}
static int mmc_test_cleanup_verify(struct mmc_test_card *test)
{
int ret, i;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
memset(test->buffer, 0, BUFFER_SIZE);
for (i = 0;i < BUFFER_SIZE / 512;i++) {
ret = mmc_test_transfer(test, 1, test->buffer + i * 512,
i * 512, 1, 512);
if (ret)
return ret;
}
return 0;
}
/*******************************************************************/
/* Tests */
/*******************************************************************/
struct mmc_test_case {
const char *name;
int (*prepare)(struct mmc_test_card *);
int (*run)(struct mmc_test_card *);
int (*cleanup)(struct mmc_test_card *);
};
static int mmc_test_basic_write(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = mmc_test_transfer(test, 1, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_basic_read(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = mmc_test_transfer(test, 0, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_verify_write(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_verified_transfer(test, 1, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_verify_read(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_verified_transfer(test, 0, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_multi_write(struct mmc_test_card *test)
{
int ret;
unsigned int size;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
if (size < 1024)
return RESULT_UNSUP_HOST;
ret = mmc_test_verified_transfer(test, 1, test->buffer, 0,
size / 512, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_multi_read(struct mmc_test_card *test)
{
int ret;
unsigned int size;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
if (size < 1024)
return RESULT_UNSUP_HOST;
ret = mmc_test_verified_transfer(test, 0, test->buffer, 0,
size / 512, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_pow2_write(struct mmc_test_card *test)
{
int ret, i;
if (!test->card->csd.write_partial)
return RESULT_UNSUP_CARD;
for (i = 1; i < 512;i <<= 1) {
ret = mmc_test_verified_transfer(test, 1,
test->buffer, 0, 1, i);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_pow2_read(struct mmc_test_card *test)
{
int ret, i;
if (!test->card->csd.read_partial)
return RESULT_UNSUP_CARD;
for (i = 1; i < 512;i <<= 1) {
ret = mmc_test_verified_transfer(test, 0,
test->buffer, 0, 1, i);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_weird_write(struct mmc_test_card *test)
{
int ret, i;
if (!test->card->csd.write_partial)
return RESULT_UNSUP_CARD;
for (i = 3; i < 512;i += 7) {
ret = mmc_test_verified_transfer(test, 1,
test->buffer, 0, 1, i);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_weird_read(struct mmc_test_card *test)
{
int ret, i;
if (!test->card->csd.read_partial)
return RESULT_UNSUP_CARD;
for (i = 3; i < 512;i += 7) {
ret = mmc_test_verified_transfer(test, 0,
test->buffer, 0, 1, i);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_align_write(struct mmc_test_card *test)
{
int ret, i;
for (i = 1;i < 4;i++) {
ret = mmc_test_verified_transfer(test, 1, test->buffer + i,
0, 1, 512);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_align_read(struct mmc_test_card *test)
{
int ret, i;
for (i = 1;i < 4;i++) {
ret = mmc_test_verified_transfer(test, 0, test->buffer + i,
0, 1, 512);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_align_multi_write(struct mmc_test_card *test)
{
int ret, i;
unsigned int size;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
if (size < 1024)
return RESULT_UNSUP_HOST;
for (i = 1;i < 4;i++) {
ret = mmc_test_verified_transfer(test, 1, test->buffer + i,
0, size / 512, 512);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_align_multi_read(struct mmc_test_card *test)
{
int ret, i;
unsigned int size;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
if (size < 1024)
return RESULT_UNSUP_HOST;
for (i = 1;i < 4;i++) {
ret = mmc_test_verified_transfer(test, 0, test->buffer + i,
0, size / 512, 512);
if (ret)
return ret;
}
return 0;
}
static int mmc_test_xfersize_write(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = __mmc_test_transfer(test, 1, 1, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_xfersize_read(struct mmc_test_card *test)
{
int ret;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = __mmc_test_transfer(test, 0, 1, test->buffer, 0, 1, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_multi_xfersize_write(struct mmc_test_card *test)
{
int ret;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = __mmc_test_transfer(test, 1, 1, test->buffer, 0, 2, 512);
if (ret)
return ret;
return 0;
}
static int mmc_test_multi_xfersize_read(struct mmc_test_card *test)
{
int ret;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
ret = mmc_test_set_blksize(test, 512);
if (ret)
return ret;
ret = __mmc_test_transfer(test, 0, 1, test->buffer, 0, 2, 512);
if (ret)
return ret;
return 0;
}
static const struct mmc_test_case mmc_test_cases[] = {
{
.name = "Basic write (no data verification)",
.run = mmc_test_basic_write,
},
{
.name = "Basic read (no data verification)",
.run = mmc_test_basic_read,
},
{
.name = "Basic write (with data verification)",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_verify_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Basic read (with data verification)",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_verify_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Multi-block write",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_multi_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Multi-block read",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_multi_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Power of two block writes",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_pow2_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Power of two block reads",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_pow2_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Weird sized block writes",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_weird_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Weird sized block reads",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_weird_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Badly aligned write",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_align_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Badly aligned read",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_align_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Badly aligned multi-block write",
.prepare = mmc_test_prepare_verify_write,
.run = mmc_test_align_multi_write,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Badly aligned multi-block read",
.prepare = mmc_test_prepare_verify_read,
.run = mmc_test_align_multi_read,
.cleanup = mmc_test_cleanup_verify,
},
{
.name = "Correct xfer_size at write (start failure)",
.run = mmc_test_xfersize_write,
},
{
.name = "Correct xfer_size at read (start failure)",
.run = mmc_test_xfersize_read,
},
{
.name = "Correct xfer_size at write (midway failure)",
.run = mmc_test_multi_xfersize_write,
},
{
.name = "Correct xfer_size at read (midway failure)",
.run = mmc_test_multi_xfersize_read,
},
};
static struct mutex mmc_test_lock;
mmc_test: add test case control Add the ability to run just a single test case by writing the test case number into the sysfs "test" file. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-24 22:36:31 +02:00
static void mmc_test_run(struct mmc_test_card *test, int testcase)
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
{
int i, ret;
printk(KERN_INFO "%s: Starting tests of card %s...\n",
mmc_hostname(test->card->host), mmc_card_id(test->card));
mmc_claim_host(test->card->host);
for (i = 0;i < ARRAY_SIZE(mmc_test_cases);i++) {
mmc_test: add test case control Add the ability to run just a single test case by writing the test case number into the sysfs "test" file. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-24 22:36:31 +02:00
if (testcase && ((i + 1) != testcase))
continue;
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
printk(KERN_INFO "%s: Test case %d. %s...\n",
mmc_hostname(test->card->host), i + 1,
mmc_test_cases[i].name);
if (mmc_test_cases[i].prepare) {
ret = mmc_test_cases[i].prepare(test);
if (ret) {
printk(KERN_INFO "%s: Result: Prepare "
"stage failed! (%d)\n",
mmc_hostname(test->card->host),
ret);
continue;
}
}
ret = mmc_test_cases[i].run(test);
switch (ret) {
case RESULT_OK:
printk(KERN_INFO "%s: Result: OK\n",
mmc_hostname(test->card->host));
break;
case RESULT_FAIL:
printk(KERN_INFO "%s: Result: FAILED\n",
mmc_hostname(test->card->host));
break;
case RESULT_UNSUP_HOST:
printk(KERN_INFO "%s: Result: UNSUPPORTED "
"(by host)\n",
mmc_hostname(test->card->host));
break;
case RESULT_UNSUP_CARD:
printk(KERN_INFO "%s: Result: UNSUPPORTED "
"(by card)\n",
mmc_hostname(test->card->host));
break;
default:
printk(KERN_INFO "%s: Result: ERROR (%d)\n",
mmc_hostname(test->card->host), ret);
}
if (mmc_test_cases[i].cleanup) {
ret = mmc_test_cases[i].cleanup(test);
if (ret) {
printk(KERN_INFO "%s: Warning: Cleanup "
"stage failed! (%d)\n",
mmc_hostname(test->card->host),
ret);
}
}
}
mmc_release_host(test->card->host);
printk(KERN_INFO "%s: Tests completed.\n",
mmc_hostname(test->card->host));
}
static ssize_t mmc_test_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
mutex_lock(&mmc_test_lock);
mutex_unlock(&mmc_test_lock);
return 0;
}
static ssize_t mmc_test_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct mmc_card *card;
struct mmc_test_card *test;
mmc_test: add test case control Add the ability to run just a single test case by writing the test case number into the sysfs "test" file. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-24 22:36:31 +02:00
int testcase;
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
card = container_of(dev, struct mmc_card, dev);
mmc_test: add test case control Add the ability to run just a single test case by writing the test case number into the sysfs "test" file. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-24 22:36:31 +02:00
testcase = simple_strtol(buf, NULL, 10);
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
test = kzalloc(sizeof(struct mmc_test_card), GFP_KERNEL);
if (!test)
return -ENOMEM;
test->card = card;
test->buffer = kzalloc(BUFFER_SIZE, GFP_KERNEL);
if (test->buffer) {
mutex_lock(&mmc_test_lock);
mmc_test: add test case control Add the ability to run just a single test case by writing the test case number into the sysfs "test" file. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-05-24 22:36:31 +02:00
mmc_test_run(test, testcase);
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
mutex_unlock(&mmc_test_lock);
}
kfree(test->buffer);
kfree(test);
return count;
}
static DEVICE_ATTR(test, S_IWUSR | S_IRUGO, mmc_test_show, mmc_test_store);
static int mmc_test_probe(struct mmc_card *card)
{
int ret;
mmc_test: only bind to supported cards We can only perform the tests on MMC and SD cards, so avoid binding to any other type. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-06-28 17:51:27 +02:00
if ((card->type != MMC_TYPE_MMC) && (card->type != MMC_TYPE_SD))
return -ENODEV;
mmc: mmc host test driver A dummy driver that performs a series of requests that are often mis- handled by host drivers. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-12 14:23:50 +02:00
mutex_init(&mmc_test_lock);
ret = device_create_file(&card->dev, &dev_attr_test);
if (ret)
return ret;
return 0;
}
static void mmc_test_remove(struct mmc_card *card)
{
device_remove_file(&card->dev, &dev_attr_test);
}
static struct mmc_driver mmc_driver = {
.drv = {
.name = "mmc_test",
},
.probe = mmc_test_probe,
.remove = mmc_test_remove,
};
static int __init mmc_test_init(void)
{
return mmc_register_driver(&mmc_driver);
}
static void __exit mmc_test_exit(void)
{
mmc_unregister_driver(&mmc_driver);
}
module_init(mmc_test_init);
module_exit(mmc_test_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Multimedia Card (MMC) host test driver");
MODULE_AUTHOR("Pierre Ossman");
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