u-boot/drivers/block/blk_legacy.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

264 lines
5.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <linux/err.h>
struct blk_driver *blk_driver_lookup_type(int if_type)
{
struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);
const int n_ents = ll_entry_count(struct blk_driver, blk_driver);
struct blk_driver *entry;
for (entry = drv; entry != drv + n_ents; entry++) {
if (if_type == entry->if_type)
return entry;
}
/* Not found */
return NULL;
}
static struct blk_driver *blk_driver_lookup_typename(const char *if_typename)
{
struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);
const int n_ents = ll_entry_count(struct blk_driver, blk_driver);
struct blk_driver *entry;
for (entry = drv; entry != drv + n_ents; entry++) {
if (!strcmp(if_typename, entry->if_typename))
return entry;
}
/* Not found */
return NULL;
}
const char *blk_get_if_type_name(enum if_type if_type)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
return drv ? drv->if_typename : NULL;
}
/**
* get_desc() - Get the block device descriptor for the given device number
*
* @drv: Legacy block driver
* @devnum: Device number (0 = first)
* @descp: Returns block device descriptor on success
* @return 0 on success, -ENODEV if there is no such device, -ENOSYS if the
* driver does not provide a way to find a device, or other -ve on other
* error.
*/
static int get_desc(struct blk_driver *drv, int devnum, struct blk_desc **descp)
{
if (drv->desc) {
if (devnum < 0 || devnum >= drv->max_devs)
return -ENODEV;
*descp = &drv->desc[devnum];
return 0;
}
if (!drv->get_dev)
return -ENOSYS;
return drv->get_dev(devnum, descp);
}
#ifdef CONFIG_HAVE_BLOCK_DEVICE
int blk_list_part(enum if_type if_type)
{
struct blk_driver *drv;
struct blk_desc *desc;
int devnum, ok;
bool first = true;
drv = blk_driver_lookup_type(if_type);
if (!drv)
return -ENOSYS;
for (ok = 0, devnum = 0; devnum < drv->max_devs; ++devnum) {
if (get_desc(drv, devnum, &desc))
continue;
if (desc->part_type != PART_TYPE_UNKNOWN) {
++ok;
if (!first)
putc('\n');
part_print(desc);
first = false;
}
}
if (!ok)
return -ENODEV;
return 0;
}
int blk_print_part_devnum(enum if_type if_type, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int ret;
if (!drv)
return -ENOSYS;
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
if (desc->type == DEV_TYPE_UNKNOWN)
return -ENOENT;
part_print(desc);
return 0;
}
void blk_list_devices(enum if_type if_type)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int i;
if (!drv)
return;
for (i = 0; i < drv->max_devs; ++i) {
if (get_desc(drv, i, &desc))
continue;
if (desc->type == DEV_TYPE_UNKNOWN)
continue; /* list only known devices */
printf("Device %d: ", i);
dev_print(desc);
}
}
int blk_print_device_num(enum if_type if_type, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int ret;
if (!drv)
return -ENOSYS;
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
printf("\n%s device %d: ", drv->if_typename, devnum);
dev_print(desc);
return 0;
}
int blk_show_device(enum if_type if_type, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int ret;
if (!drv)
return -ENOSYS;
printf("\nDevice %d: ", devnum);
if (devnum >= drv->max_devs) {
puts("unknown device\n");
return -ENODEV;
}
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
dev_print(desc);
if (desc->type == DEV_TYPE_UNKNOWN)
return -ENOENT;
return 0;
}
#endif /* CONFIG_HAVE_BLOCK_DEVICE */
struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
if (!drv)
return NULL;
if (get_desc(drv, devnum, &desc))
return NULL;
return desc;
}
int blk_dselect_hwpart(struct blk_desc *desc, int hwpart)
{
struct blk_driver *drv = blk_driver_lookup_type(desc->if_type);
if (!drv)
return -ENOSYS;
if (drv->select_hwpart)
return drv->select_hwpart(desc, hwpart);
return 0;
}
struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_typename(if_typename);
struct blk_desc *desc;
if (!drv)
return NULL;
if (get_desc(drv, devnum, &desc))
return NULL;
return desc;
}
ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
lbaint_t blkcnt, void *buffer)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
ulong n;
int ret;
if (!drv)
return -ENOSYS;
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
n = desc->block_read(desc, start, blkcnt, buffer);
if (IS_ERR_VALUE(n))
return n;
return n;
}
ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
lbaint_t blkcnt, const void *buffer)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int ret;
if (!drv)
return -ENOSYS;
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
return desc->block_write(desc, start, blkcnt, buffer);
}
int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
{
struct blk_driver *drv = blk_driver_lookup_type(if_type);
struct blk_desc *desc;
int ret;
if (!drv)
return -ENOSYS;
ret = get_desc(drv, devnum, &desc);
if (ret)
return ret;
return drv->select_hwpart(desc, hwpart);
}