/**************************************************************************** * examplex/mtdrwb/mtdrwb_main.c * * Copyright (C) 2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_EXAMPLES_MTDRWB /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ #if !defined(CONFIG_MTD_WRBUFFER) && !defined(CONFIG_MTD_READAHEAD) # error CONFIG_MTD_WRBUFFER or CONFIG_MTD_READAHEAD must be selected #endif /* The default is to use the RAM MTD device at drivers/mtd/rammtd.c. But * an architecture-specific MTD driver can be used instead by defining * CONFIG_EXAMPLES_MTDRWB_ARCHINIT. In this case, the initialization logic * will call mtdrwb_archinitialize() to obtain the MTD driver instance. */ #ifndef CONFIG_EXAMPLES_MTDRWB_ARCHINIT /* Make sure that the RAM MTD driver is enabled */ # ifndef CONFIG_RAMMTD # error "CONFIG_RAMMTD is required without CONFIG_EXAMPLES_MTDRWB_ARCHINIT" # endif /* This must exactly match the default configuration in drivers/mtd/rammtd.c */ # ifndef CONFIG_RAMMTD_ERASESIZE # define CONFIG_RAMMTD_ERASESIZE 4096 # endif /* Given the ERASESIZE, CONFIG_EXAMPLES_MTDRWB_NEBLOCKS will determine the * size of the RAM allocation needed. */ # ifndef CONFIG_EXAMPLES_MTDRWB_NEBLOCKS # define CONFIG_EXAMPLES_MTDRWB_NEBLOCKS (32) # endif # undef MTDRWB_BUFSIZE # define MTDRWB_BUFSIZE \ (CONFIG_RAMMTD_ERASESIZE * CONFIG_EXAMPLES_MTDRWB_NEBLOCKS) #endif /**************************************************************************** * Private Types ****************************************************************************/ struct mtdweb_filedesc_s { FAR char *name; bool deleted; size_t len; uint32_t crc; }; /**************************************************************************** * Private Data ****************************************************************************/ /* Pre-allocated simulated flash */ #ifndef CONFIG_EXAMPLES_MTDRWB_ARCHINIT static uint8_t g_simflash[MTDRWB_BUFSIZE]; #endif /**************************************************************************** * External Functions ****************************************************************************/ #ifdef CONFIG_EXAMPLES_MTDRWB_ARCHINIT extern FAR struct mtd_dev_s *mtdrwb_archinitialize(void); #endif /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: mtdrwb_main ****************************************************************************/ int main(int argc, FAR char *argv[]) { FAR struct mtd_dev_s *mtdraw; FAR struct mtd_dev_s *mtdrwb; FAR struct mtd_geometry_s geo; FAR uint32_t *buffer; ssize_t nbytes; off_t nblocks; off_t offset; off_t seekpos; unsigned int blkpererase; int fd; int i; int j; int k; int ret; /* Create and initialize a RAM MTD FLASH driver instance */ #ifdef CONFIG_EXAMPLES_MTDRWB_ARCHINIT mtdraw = mtdrwb_archinitialize(); #else mtdraw = rammtd_initialize(g_simflash, MTDRWB_BUFSIZE); #endif if (!mtdraw) { printf("ERROR: Failed to create RAM MTD instance\n"); fflush(stdout); exit(1); } /* Perform the IOCTL to erase the entire FLASH part */ ret = mtdraw->ioctl(mtdraw, MTDIOC_BULKERASE, 0); if (ret < 0) { printf("ERROR: MTDIOC_BULKERASE ioctl failed: %d\n", ret); } /* Initialize to support buffering on the MTD device */ mtdrwb = mtd_rwb_initialize(mtdraw); if (!mtdrwb) { printf("ERROR: Failed to create RAM MTD R/W buffering\n"); fflush(stdout); exit(2); } /* Initialize to provide an FTL block driver on the MTD FLASH interface. * * NOTE: We could just skip all of this FTL and BCH stuff. We could * instead just use the MTD drivers bwrite and bread to perform this * test. Creating the character drivers, however, makes this test more * interesting. */ ret = ftl_initialize(0, mtdrwb); if (ret < 0) { printf("ERROR: ftl_initialize /dev/mtdblock0 failed: %d\n", ret); fflush(stdout); exit(3); } /* Now create a character device on the block device */ ret = bchdev_register("/dev/mtdblock0", "/dev/mtd0", false); if (ret < 0) { printf("ERROR: bchdev_register /dev/mtd0 failed: %d\n", ret); fflush(stdout); exit(4); } /* Get the geometry of the FLASH device */ ret = mtdrwb->ioctl(mtdrwb, MTDIOC_GEOMETRY, (unsigned long)((uintptr_t)&geo)); if (ret < 0) { ferr("ERROR: mtdrwb->ioctl failed: %d\n", ret); exit(5); } printf("Flash Geometry:\n"); printf(" blocksize: %lu\n", (unsigned long)geo.blocksize); printf(" erasesize: %lu\n", (unsigned long)geo.erasesize); printf(" neraseblocks: %lu\n", (unsigned long)geo.neraseblocks); blkpererase = geo.erasesize / geo.blocksize; printf(" blkpererase: %u\n", blkpererase); nblocks = geo.neraseblocks * blkpererase; printf(" nblocks: %lu\n", (unsigned long)nblocks); /* Allocate a buffer */ buffer = (FAR uint32_t *)malloc(geo.blocksize); if (!buffer) { printf("ERROR: failed to allocate a sector buffer\n"); fflush(stdout); exit(6); } /* Open the MTD FLASH character driver for writing */ fd = open("/dev/mtd0", O_WRONLY); if (fd < 0) { printf("ERROR: open /dev/mtd0 failed: %d\n", errno); fflush(stdout); exit(7); } /* Now write the offset into every block */ printf("Initializing media:\n"); offset = 0; for (i = 0; i < geo.neraseblocks; i++) { for (j = 0; j < blkpererase; j++) { /* Fill the block with the offset */ for (k = 0; k < geo.blocksize / sizeof(uint32_t); k++) { buffer[k] = offset; offset += sizeof(uint32_t); } /* And write it using the character driver */ nbytes = write(fd, buffer, geo.blocksize); if (nbytes < 0) { printf("ERROR: write to /dev/mtd0 failed: %d\n", errno); fflush(stdout); exit(8); } } } close(fd); /* Open the MTD character driver for reading */ fd = open("/dev/mtd0", O_RDONLY); if (fd < 0) { printf("ERROR: open /dev/mtd0 failed: %d\n", errno); fflush(stdout); exit(9); } /* Now verify the offset in every block */ offset = 0; for (j = 0; j < nblocks; j++) { /* Seek to the next read position */ seekpos = lseek(fd, offset, SEEK_SET); if (seekpos != offset) { printf("ERROR: lseek to offset %ld failed: %d\n", (unsigned long)offset, errno); fflush(stdout); exit(10); } /* Read the next block into memory */ nbytes = read(fd, buffer, geo.blocksize); if (nbytes < 0) { printf("ERROR: read from /dev/mtd0 failed: %d\n", errno); fflush(stdout); exit(11); } else if (nbytes == 0) { printf("ERROR: Unexpected end-of file in /dev/mtd0\n"); fflush(stdout); exit(12); } else if (nbytes != geo.blocksize) { printf("ERROR: Unexpected read size from /dev/mtd0 : %ld\n", (unsigned long)nbytes); fflush(stdout); exit(13); } /* Since we forced the size of the partition to be an even number * of erase blocks, we do not expect to encounter the end of file * indication. */ else if (nbytes == 0) { printf("ERROR: Unexpected end of file on /dev/mtd0\n"); fflush(stdout); exit(14); } /* This is not expected at all */ else if (nbytes != geo.blocksize) { printf("ERROR: Short read from /dev/mtd0 failed: %lu\n", (unsigned long)nbytes); fflush(stdout); exit(15); } /* Verify the offsets in the block */ for (k = 0; k < geo.blocksize / sizeof(uint32_t); k++) { if (buffer[k] != offset) { printf("ERROR: Bad offset %lu, expected %lu\n", (long)buffer[k], (long)offset); fflush(stdout); exit(16); } offset += sizeof(uint32_t); } } /* Try reading one more time. We should get the end of file */ nbytes = read(fd, buffer, geo.blocksize); if (nbytes != 0) { printf("ERROR: Expected end-of-file from /dev/mtd0 failed: %d %d\n", nbytes, errno); fflush(stdout); exit(20); } close(fd); /* And exit without bothering to clean up */ printf("PASS: Everything looks good\n"); fflush(stdout); return 0; } #endif /* CONFIG_EXAMPLES_MTDRWB */