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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
4 */
5
6#include <blk.h>
7#include <dm.h>
8#include <fdtdec.h>
9#include <part.h>
10#include <os.h>
11#include <malloc.h>
12#include <sandbox_host.h>
13#include <asm/global_data.h>
14#include <dm/device_compat.h>
15#include <dm/device-internal.h>
16#include <linux/errno.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20static unsigned long host_block_read(struct udevice *dev,
21 unsigned long start, lbaint_t blkcnt,
22 void *buffer)
23{
24 struct blk_desc *desc = dev_get_uclass_plat(dev);
25 struct udevice *host_dev = dev_get_parent(dev);
26 struct host_sb_plat *plat = dev_get_plat(host_dev);
27
28 if (os_lseek(plat->fd, start * desc->blksz, OS_SEEK_SET) < 0) {
29 printf("ERROR: Invalid block %lx\n", start);
30 return -1;
31 }
32 ssize_t len = os_read(plat->fd, buffer, blkcnt * desc->blksz);
33 if (len >= 0)
34 return len / desc->blksz;
35
36 return -EIO;
37}
38
39static unsigned long host_block_write(struct udevice *dev,
40 unsigned long start, lbaint_t blkcnt,
41 const void *buffer)
42{
43 struct blk_desc *desc = dev_get_uclass_plat(dev);
44 struct udevice *host_dev = dev_get_parent(dev);
45 struct host_sb_plat *plat = dev_get_plat(host_dev);
46
47 if (os_lseek(plat->fd, start * desc->blksz, OS_SEEK_SET) < 0) {
48 printf("ERROR: Invalid block %lx\n", start);
49 return -1;
50 }
51 ssize_t len = os_write(plat->fd, buffer, blkcnt * desc->blksz);
52 if (len >= 0)
53 return len / desc->blksz;
54
55 return -EIO;
56}
57
58static const struct blk_ops sandbox_host_blk_ops = {
59 .read = host_block_read,
60 .write = host_block_write,
61};
62
63U_BOOT_DRIVER(sandbox_host_blk) = {
64 .name = "sandbox_host_blk",
65 .id = UCLASS_BLK,
66 .ops = &sandbox_host_blk_ops,
67};