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>
This commit is contained in:
Pierre Ossman
parent
df48dd0287
commit
88ae600d58
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@ -39,3 +39,15 @@ config SDIO_UART
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SDIO function driver for SDIO cards that implements the UART
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class, as well as the GPS class which appears like a UART.
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config MMC_TEST
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tristate "MMC host test driver"
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default n
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help
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Development driver that performs a series of reads and writes
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to a memory card in order to expose certain well known bugs
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in host controllers. The tests are executed by writing to the
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"test" file in sysfs under each card. Note that whatever is
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on your card will be overwritten by these tests.
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This driver is only of interest to those developing or
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testing a host driver. Most people should say N here.
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@ -8,6 +8,7 @@ endif
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obj-$(CONFIG_MMC_BLOCK) += mmc_block.o
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mmc_block-objs := block.o queue.o
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obj-$(CONFIG_MMC_TEST) += mmc_test.o
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obj-$(CONFIG_SDIO_UART) += sdio_uart.o
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@ -0,0 +1,892 @@
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/*
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* linux/drivers/mmc/card/mmc_test.c
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*
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* Copyright 2007 Pierre Ossman
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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/mmc/core.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/scatterlist.h>
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#define RESULT_OK 0
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#define RESULT_FAIL 1
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#define RESULT_UNSUP_HOST 2
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#define RESULT_UNSUP_CARD 3
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#define BUFFER_SIZE (PAGE_SIZE * 4)
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struct mmc_test_card {
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struct mmc_card *card;
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u8 *buffer;
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};
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/*******************************************************************/
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/* Helper functions */
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/*******************************************************************/
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static int mmc_test_set_blksize(struct mmc_test_card *test, unsigned size)
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{
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struct mmc_command cmd;
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int ret;
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cmd.opcode = MMC_SET_BLOCKLEN;
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cmd.arg = size;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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ret = mmc_wait_for_cmd(test->card->host, &cmd, 0);
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if (ret)
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return ret;
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return 0;
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}
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static int __mmc_test_transfer(struct mmc_test_card *test, int write,
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unsigned broken_xfer, u8 *buffer, unsigned addr,
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unsigned blocks, unsigned blksz)
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{
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int ret, busy;
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struct mmc_request mrq;
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struct mmc_command cmd;
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struct mmc_command stop;
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struct mmc_data data;
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struct scatterlist sg;
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memset(&mrq, 0, sizeof(struct mmc_request));
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mrq.cmd = &cmd;
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mrq.data = &data;
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memset(&cmd, 0, sizeof(struct mmc_command));
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if (broken_xfer) {
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if (blocks > 1) {
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cmd.opcode = write ?
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MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
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} else {
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cmd.opcode = MMC_SEND_STATUS;
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}
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} else {
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if (blocks > 1) {
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cmd.opcode = write ?
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MMC_WRITE_MULTIPLE_BLOCK : MMC_READ_MULTIPLE_BLOCK;
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} else {
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cmd.opcode = write ?
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MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
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}
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}
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if (broken_xfer && blocks == 1)
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cmd.arg = test->card->rca << 16;
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else
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cmd.arg = addr;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
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memset(&stop, 0, sizeof(struct mmc_command));
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if (!broken_xfer && (blocks > 1)) {
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stop.opcode = MMC_STOP_TRANSMISSION;
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stop.arg = 0;
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stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
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mrq.stop = &stop;
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}
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memset(&data, 0, sizeof(struct mmc_data));
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data.blksz = blksz;
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data.blocks = blocks;
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data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
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data.sg = &sg;
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data.sg_len = 1;
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sg_init_one(&sg, buffer, blocks * blksz);
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mmc_set_data_timeout(&data, test->card);
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mmc_wait_for_req(test->card->host, &mrq);
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ret = 0;
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if (broken_xfer) {
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if (!ret && cmd.error)
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ret = cmd.error;
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if (!ret && data.error == 0)
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ret = RESULT_FAIL;
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if (!ret && data.error != -ETIMEDOUT)
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ret = data.error;
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if (!ret && stop.error)
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ret = stop.error;
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if (blocks > 1) {
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if (!ret && data.bytes_xfered > blksz)
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ret = RESULT_FAIL;
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} else {
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if (!ret && data.bytes_xfered > 0)
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ret = RESULT_FAIL;
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}
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} else {
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if (!ret && cmd.error)
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ret = cmd.error;
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if (!ret && data.error)
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ret = data.error;
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if (!ret && stop.error)
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ret = stop.error;
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if (!ret && data.bytes_xfered != blocks * blksz)
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ret = RESULT_FAIL;
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}
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if (ret == -EINVAL)
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ret = RESULT_UNSUP_HOST;
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busy = 0;
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do {
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int ret2;
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memset(&cmd, 0, sizeof(struct mmc_command));
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cmd.opcode = MMC_SEND_STATUS;
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cmd.arg = test->card->rca << 16;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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ret2 = mmc_wait_for_cmd(test->card->host, &cmd, 0);
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if (ret2)
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break;
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if (!busy && !(cmd.resp[0] & R1_READY_FOR_DATA)) {
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busy = 1;
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printk(KERN_INFO "%s: Warning: Host did not "
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"wait for busy state to end.\n",
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mmc_hostname(test->card->host));
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}
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} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
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return ret;
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}
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static int mmc_test_transfer(struct mmc_test_card *test, int write,
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u8 *buffer, unsigned addr, unsigned blocks, unsigned blksz)
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{
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return __mmc_test_transfer(test, write, 0, buffer,
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addr, blocks, blksz);
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}
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static int mmc_test_prepare_verify(struct mmc_test_card *test, int write)
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{
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int ret, i;
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ret = mmc_test_set_blksize(test, 512);
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if (ret)
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return ret;
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if (write)
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memset(test->buffer, 0xDF, BUFFER_SIZE);
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else {
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for (i = 0;i < BUFFER_SIZE;i++)
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test->buffer[i] = i;
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}
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for (i = 0;i < BUFFER_SIZE / 512;i++) {
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ret = mmc_test_transfer(test, 1, test->buffer + i * 512,
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i * 512, 1, 512);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_prepare_verify_write(struct mmc_test_card *test)
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{
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return mmc_test_prepare_verify(test, 1);
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}
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static int mmc_test_prepare_verify_read(struct mmc_test_card *test)
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{
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return mmc_test_prepare_verify(test, 0);
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}
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static int mmc_test_verified_transfer(struct mmc_test_card *test, int write,
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u8 *buffer, unsigned addr, unsigned blocks, unsigned blksz)
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{
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int ret, i, sectors;
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/*
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* It is assumed that the above preparation has been done.
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*/
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memset(test->buffer, 0, BUFFER_SIZE);
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if (write) {
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for (i = 0;i < blocks * blksz;i++)
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buffer[i] = i;
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}
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ret = mmc_test_set_blksize(test, blksz);
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if (ret)
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return ret;
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ret = mmc_test_transfer(test, write, buffer, addr, blocks, blksz);
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if (ret)
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return ret;
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if (write) {
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ret = mmc_test_set_blksize(test, 512);
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if (ret)
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return ret;
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sectors = (blocks * blksz + 511) / 512;
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if ((sectors * 512) == (blocks * blksz))
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sectors++;
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if ((sectors * 512) > BUFFER_SIZE)
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return -EINVAL;
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memset(test->buffer, 0, sectors * 512);
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for (i = 0;i < sectors;i++) {
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ret = mmc_test_transfer(test, 0,
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test->buffer + i * 512,
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addr + i * 512, 1, 512);
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if (ret)
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return ret;
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}
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for (i = 0;i < blocks * blksz;i++) {
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if (test->buffer[i] != (u8)i)
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return RESULT_FAIL;
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}
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for (;i < sectors * 512;i++) {
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if (test->buffer[i] != 0xDF)
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return RESULT_FAIL;
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}
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} else {
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for (i = 0;i < blocks * blksz;i++) {
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if (buffer[i] != (u8)i)
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return RESULT_FAIL;
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}
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}
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return 0;
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}
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static int mmc_test_cleanup_verify(struct mmc_test_card *test)
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{
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int ret, i;
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ret = mmc_test_set_blksize(test, 512);
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if (ret)
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return ret;
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memset(test->buffer, 0, BUFFER_SIZE);
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for (i = 0;i < BUFFER_SIZE / 512;i++) {
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ret = mmc_test_transfer(test, 1, test->buffer + i * 512,
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i * 512, 1, 512);
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if (ret)
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return ret;
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}
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return 0;
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}
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/*******************************************************************/
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/* Tests */
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/*******************************************************************/
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struct mmc_test_case {
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const char *name;
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int (*prepare)(struct mmc_test_card *);
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int (*run)(struct mmc_test_card *);
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int (*cleanup)(struct mmc_test_card *);
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};
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static int mmc_test_basic_write(struct mmc_test_card *test)
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{
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int ret;
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ret = mmc_test_set_blksize(test, 512);
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if (ret)
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return ret;
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ret = mmc_test_transfer(test, 1, test->buffer, 0, 1, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_basic_read(struct mmc_test_card *test)
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{
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int ret;
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ret = mmc_test_set_blksize(test, 512);
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if (ret)
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return ret;
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ret = mmc_test_transfer(test, 0, test->buffer, 0, 1, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_verify_write(struct mmc_test_card *test)
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{
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int ret;
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ret = mmc_test_verified_transfer(test, 1, test->buffer, 0, 1, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_verify_read(struct mmc_test_card *test)
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{
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int ret;
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ret = mmc_test_verified_transfer(test, 0, test->buffer, 0, 1, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_multi_write(struct mmc_test_card *test)
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{
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int ret;
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unsigned int size;
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if (test->card->host->max_blk_count == 1)
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return RESULT_UNSUP_HOST;
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size = PAGE_SIZE * 2;
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size = min(size, test->card->host->max_req_size);
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size = min(size, test->card->host->max_seg_size);
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size = min(size, test->card->host->max_blk_count * 512);
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if (size < 1024)
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return RESULT_UNSUP_HOST;
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ret = mmc_test_verified_transfer(test, 1, test->buffer, 0,
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size / 512, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_multi_read(struct mmc_test_card *test)
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{
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int ret;
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unsigned int size;
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if (test->card->host->max_blk_count == 1)
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return RESULT_UNSUP_HOST;
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size = PAGE_SIZE * 2;
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size = min(size, test->card->host->max_req_size);
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size = min(size, test->card->host->max_seg_size);
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size = min(size, test->card->host->max_blk_count * 512);
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if (size < 1024)
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return RESULT_UNSUP_HOST;
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ret = mmc_test_verified_transfer(test, 0, test->buffer, 0,
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size / 512, 512);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_pow2_write(struct mmc_test_card *test)
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{
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int ret, i;
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if (!test->card->csd.write_partial)
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return RESULT_UNSUP_CARD;
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for (i = 1; i < 512;i <<= 1) {
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ret = mmc_test_verified_transfer(test, 1,
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test->buffer, 0, 1, i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_pow2_read(struct mmc_test_card *test)
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{
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int ret, i;
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if (!test->card->csd.read_partial)
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return RESULT_UNSUP_CARD;
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for (i = 1; i < 512;i <<= 1) {
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ret = mmc_test_verified_transfer(test, 0,
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test->buffer, 0, 1, i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_weird_write(struct mmc_test_card *test)
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{
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int ret, i;
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if (!test->card->csd.write_partial)
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return RESULT_UNSUP_CARD;
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for (i = 3; i < 512;i += 7) {
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ret = mmc_test_verified_transfer(test, 1,
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test->buffer, 0, 1, i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_weird_read(struct mmc_test_card *test)
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{
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int ret, i;
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if (!test->card->csd.read_partial)
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return RESULT_UNSUP_CARD;
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for (i = 3; i < 512;i += 7) {
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ret = mmc_test_verified_transfer(test, 0,
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test->buffer, 0, 1, i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_align_write(struct mmc_test_card *test)
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{
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int ret, i;
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for (i = 1;i < 4;i++) {
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ret = mmc_test_verified_transfer(test, 1, test->buffer + i,
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0, 1, 512);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_test_align_read(struct mmc_test_card *test)
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{
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int ret, i;
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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;
|
||||
|
||||
static void mmc_test_run(struct mmc_test_card *test)
|
||||
{
|
||||
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++) {
|
||||
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;
|
||||
|
||||
card = container_of(dev, struct mmc_card, dev);
|
||||
|
||||
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_run(test);
|
||||
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;
|
||||
|
||||
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");
|
||||
Loading…
Reference in New Issue