u-boot/drivers/block/blk_legacy.c
Simon Glass 8149b1500d blk: Rename if_type to uclass_id
Use the word 'uclass' instead of 'if_type' to complete the conversion.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-09-25 08:30:05 -06:00

264 lines
5.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <blk.h>
#include <part.h>
#include <linux/err.h>
struct blk_driver *blk_driver_lookup_type(int uclass_id)
{
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 (uclass_id == entry->uclass_id)
return entry;
}
/* Not found */
return NULL;
}
static struct blk_driver *blk_driver_lookup_typename(const char *uclass_idname)
{
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(uclass_idname, entry->uclass_idname))
return entry;
}
/* Not found */
return NULL;
}
const char *blk_get_uclass_name(enum uclass_id uclass_id)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
return drv ? drv->uclass_idname : 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);
}
int blk_list_part(enum uclass_id uclass_id)
{
struct blk_driver *drv;
struct blk_desc *desc;
int devnum, ok;
bool first = true;
drv = blk_driver_lookup_type(uclass_id);
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 uclass_id uclass_id, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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 uclass_id uclass_id)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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 uclass_id uclass_id, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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->uclass_idname, devnum);
dev_print(desc);
return 0;
}
int blk_show_device(enum uclass_id uclass_id, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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;
}
struct blk_desc *blk_get_devnum_by_uclass_id(enum uclass_id uclass_id, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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->uclass_id);
if (!drv)
return -ENOSYS;
if (drv->select_hwpart)
return drv->select_hwpart(desc, hwpart);
return 0;
}
struct blk_desc *blk_get_devnum_by_uclass_idname(const char *uclass_idname, int devnum)
{
struct blk_driver *drv = blk_driver_lookup_typename(uclass_idname);
struct blk_desc *desc;
if (!drv)
return NULL;
if (get_desc(drv, devnum, &desc))
return NULL;
return desc;
}
ulong blk_read_devnum(enum uclass_id uclass_id, int devnum, lbaint_t start,
lbaint_t blkcnt, void *buffer)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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 uclass_id uclass_id, int devnum, lbaint_t start,
lbaint_t blkcnt, const void *buffer)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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 uclass_id uclass_id, int devnum, int hwpart)
{
struct blk_driver *drv = blk_driver_lookup_type(uclass_id);
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);
}