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/*
* Copyright (C) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
int blk_first_device(int if_type, struct udevice **devp)
{
struct blk_desc *desc;
int ret;
ret = uclass_first_device(UCLASS_BLK, devp);
if (ret)
return ret;
if (!*devp)
return -ENODEV;
do {
desc = dev_get_uclass_platdata(*devp);
if (desc->if_type == if_type)
return 0;
ret = uclass_next_device(devp);
if (ret)
return ret;
} while (*devp);
return -ENODEV;
}
int blk_next_device(struct udevice **devp)
{
struct blk_desc *desc;
int ret, if_type;
desc = dev_get_uclass_platdata(*devp);
if_type = desc->if_type;
do {
ret = uclass_next_device(devp);
if (ret)
return ret;
if (!*devp)
return -ENODEV;
desc = dev_get_uclass_platdata(*devp);
if (desc->if_type == if_type)
return 0;
} while (1);
}
int blk_get_device(int if_type, int devnum, struct udevice **devp)
{
struct uclass *uc;
struct udevice *dev;
int ret;
ret = uclass_get(UCLASS_BLK, &uc);
if (ret)
return ret;
uclass_foreach_dev(dev, uc) {
struct blk_desc *desc = dev_get_uclass_platdata(dev);
debug("%s: if_type=%d, devnum=%d: %s, %d, %d\n", __func__,
if_type, devnum, dev->name, desc->if_type, desc->devnum);
if (desc->if_type == if_type && desc->devnum == devnum) {
*devp = dev;
return device_probe(dev);
}
}
return -ENODEV;
}
unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
lbaint_t blkcnt, void *buffer)
{
struct udevice *dev = block_dev->bdev;
const struct blk_ops *ops = blk_get_ops(dev);
ulong blks_read;
if (!ops->read)
return -ENOSYS;
if (blkcache_read(block_dev->if_type, block_dev->devnum,
start, blkcnt, block_dev->blksz, buffer))
return blkcnt;
blks_read = ops->read(dev, start, blkcnt, buffer);
if (blks_read == blkcnt)
blkcache_fill(block_dev->if_type, block_dev->devnum,
start, blkcnt, block_dev->blksz, buffer);
return blks_read;
}
unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
lbaint_t blkcnt, const void *buffer)
{
struct udevice *dev = block_dev->bdev;
const struct blk_ops *ops = blk_get_ops(dev);
if (!ops->write)
return -ENOSYS;
blkcache_invalidate(block_dev->if_type, block_dev->devnum);
return ops->write(dev, start, blkcnt, buffer);
}
unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
lbaint_t blkcnt)
{
struct udevice *dev = block_dev->bdev;
const struct blk_ops *ops = blk_get_ops(dev);
if (!ops->erase)
return -ENOSYS;
blkcache_invalidate(block_dev->if_type, block_dev->devnum);
return ops->erase(dev, start, blkcnt);
}
int blk_prepare_device(struct udevice *dev)
{
struct blk_desc *desc = dev_get_uclass_platdata(dev);
part_init(desc);
return 0;
}
int blk_create_device(struct udevice *parent, const char *drv_name,
const char *name, int if_type, int devnum, int blksz,
lbaint_t size, struct udevice **devp)
{
struct blk_desc *desc;
struct udevice *dev;
int ret;
ret = device_bind_driver(parent, drv_name, name, &dev);
if (ret)
return ret;
desc = dev_get_uclass_platdata(dev);
desc->if_type = if_type;
desc->blksz = blksz;
desc->lba = size / blksz;
desc->part_type = PART_TYPE_UNKNOWN;
desc->bdev = dev;
desc->devnum = devnum;
*devp = dev;
return 0;
}
int blk_unbind_all(int if_type)
{
struct uclass *uc;
struct udevice *dev, *next;
int ret;
ret = uclass_get(UCLASS_BLK, &uc);
if (ret)
return ret;
uclass_foreach_dev_safe(dev, next, uc) {
struct blk_desc *desc = dev_get_uclass_platdata(dev);
if (desc->if_type == if_type) {
ret = device_remove(dev);
if (ret)
return ret;
ret = device_unbind(dev);
if (ret)
return ret;
}
}
return 0;
}
UCLASS_DRIVER(blk) = {
.id = UCLASS_BLK,
.name = "blk",
.per_device_platdata_auto_alloc_size = sizeof(struct blk_desc),
};
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