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author | Stefano Babic <sbabic@denx.de> | 2014-01-26 12:11:54 +0100 |
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committer | Stefano Babic <sbabic@denx.de> | 2014-01-26 12:11:54 +0100 |
commit | 707acd01ded3c60a4e277f7c5432d397897b4dfd (patch) | |
tree | 5730e1e1f0bac6c1aeddc261cb412fc3d5f220fd /drivers/block/sandbox.c | |
parent | be2a3bb39adf1fdd274fc427e30ef62eb86441a1 (diff) | |
parent | c71b4dd2da0dcddabd7c29e6c3dc8a495d4bd928 (diff) | |
download | u-boot-imx-707acd01ded3c60a4e277f7c5432d397897b4dfd.zip u-boot-imx-707acd01ded3c60a4e277f7c5432d397897b4dfd.tar.gz u-boot-imx-707acd01ded3c60a4e277f7c5432d397897b4dfd.tar.bz2 |
Merge branch 'master' of git://git.denx.de/u-boot-arm
Diffstat (limited to 'drivers/block/sandbox.c')
-rw-r--r-- | drivers/block/sandbox.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/block/sandbox.c b/drivers/block/sandbox.c new file mode 100644 index 0000000..73f4c4a --- /dev/null +++ b/drivers/block/sandbox.c @@ -0,0 +1,124 @@ +/* + * Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <common.h> +#include <part.h> +#include <os.h> +#include <malloc.h> +#include <sandboxblockdev.h> +#include <asm/errno.h> + +static struct host_block_dev host_devices[CONFIG_HOST_MAX_DEVICES]; + +static struct host_block_dev *find_host_device(int dev) +{ + if (dev >= 0 && dev < CONFIG_HOST_MAX_DEVICES) + return &host_devices[dev]; + + return NULL; +} + +static unsigned long host_block_read(int dev, unsigned long start, + lbaint_t blkcnt, void *buffer) +{ + struct host_block_dev *host_dev = find_host_device(dev); + + if (!host_dev) + return -1; + if (os_lseek(host_dev->fd, + start * host_dev->blk_dev.blksz, + OS_SEEK_SET) == -1) { + printf("ERROR: Invalid position\n"); + return -1; + } + ssize_t len = os_read(host_dev->fd, buffer, + blkcnt * host_dev->blk_dev.blksz); + if (len >= 0) + return len / host_dev->blk_dev.blksz; + return -1; +} + +static unsigned long host_block_write(int dev, unsigned long start, + lbaint_t blkcnt, const void *buffer) +{ + struct host_block_dev *host_dev = find_host_device(dev); + if (os_lseek(host_dev->fd, + start * host_dev->blk_dev.blksz, + OS_SEEK_SET) == -1) { + printf("ERROR: Invalid position\n"); + return -1; + } + ssize_t len = os_write(host_dev->fd, buffer, blkcnt * + host_dev->blk_dev.blksz); + if (len >= 0) + return len / host_dev->blk_dev.blksz; + return -1; +} + +int host_dev_bind(int dev, char *filename) +{ + struct host_block_dev *host_dev = find_host_device(dev); + + if (!host_dev) + return -1; + if (host_dev->blk_dev.priv) { + os_close(host_dev->fd); + host_dev->blk_dev.priv = NULL; + } + if (host_dev->filename) + free(host_dev->filename); + if (filename && *filename) { + host_dev->filename = strdup(filename); + } else { + host_dev->filename = NULL; + return 0; + } + + host_dev->fd = os_open(host_dev->filename, OS_O_RDWR); + if (host_dev->fd == -1) { + printf("Failed to access host backing file '%s'\n", + host_dev->filename); + return 1; + } + + block_dev_desc_t *blk_dev = &host_dev->blk_dev; + blk_dev->if_type = IF_TYPE_HOST; + blk_dev->priv = host_dev; + blk_dev->blksz = 512; + blk_dev->lba = os_lseek(host_dev->fd, 0, OS_SEEK_END) / blk_dev->blksz; + blk_dev->block_read = host_block_read; + blk_dev->block_write = host_block_write; + blk_dev->dev = dev; + blk_dev->part_type = PART_TYPE_UNKNOWN; + init_part(blk_dev); + + return 0; +} + +int host_get_dev_err(int dev, block_dev_desc_t **blk_devp) +{ + struct host_block_dev *host_dev = find_host_device(dev); + + if (!host_dev) + return -ENODEV; + + if (!host_dev->blk_dev.priv) + return -ENOENT; + + *blk_devp = &host_dev->blk_dev; + return 0; +} + +block_dev_desc_t *host_get_dev(int dev) +{ + block_dev_desc_t *blk_dev; + + if (host_get_dev_err(dev, &blk_dev)) + return NULL; + + return blk_dev; +} |