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