mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
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>
149 lines
2.9 KiB
C
149 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 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 <dm.h>
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#include <errno.h>
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#include <linux/libfdt.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <regmap.h>
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#include <asm/io.h>
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#include <dm/of_addr.h>
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#include <linux/ioport.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct regmap *regmap_alloc_count(int count)
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{
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struct regmap *map;
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map = malloc(sizeof(struct regmap));
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if (!map)
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return NULL;
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if (count <= 1) {
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map->range = &map->base_range;
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} else {
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map->range = malloc(count * sizeof(struct regmap_range));
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if (!map->range) {
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free(map);
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return NULL;
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}
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}
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map->range_count = count;
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return map;
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}
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#if CONFIG_IS_ENABLED(OF_PLATDATA)
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int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
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struct regmap **mapp)
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{
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struct regmap_range *range;
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struct regmap *map;
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map = regmap_alloc_count(count);
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if (!map)
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return -ENOMEM;
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map->base = *reg;
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for (range = map->range; count > 0; reg += 2, range++, count--) {
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range->start = *reg;
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range->size = reg[1];
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}
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*mapp = map;
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return 0;
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}
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#else
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int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
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{
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struct regmap_range *range;
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struct regmap *map;
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int count;
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int addr_len, size_len, both_len;
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int len;
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int index;
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ofnode node = dev_ofnode(dev);
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struct resource r;
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addr_len = dev_read_simple_addr_cells(dev->parent);
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size_len = dev_read_simple_size_cells(dev->parent);
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both_len = addr_len + size_len;
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len = dev_read_size(dev, "reg");
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if (len < 0)
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return len;
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len /= sizeof(fdt32_t);
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count = len / both_len;
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if (!count)
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return -EINVAL;
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map = regmap_alloc_count(count);
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if (!map)
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return -ENOMEM;
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for (range = map->range, index = 0; count > 0;
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count--, range++, index++) {
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fdt_size_t sz;
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if (of_live_active()) {
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of_address_to_resource(ofnode_to_np(node), index, &r);
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range->start = r.start;
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range->size = r.end - r.start + 1;
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} else {
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range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob,
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dev_of_offset(dev), "reg", index,
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addr_len, size_len, &sz, true);
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range->size = sz;
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}
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}
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map->base = map->range[0].start;
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*mapp = map;
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return 0;
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}
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#endif
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void *regmap_get_range(struct regmap *map, unsigned int range_num)
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{
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struct regmap_range *range;
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if (range_num >= map->range_count)
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return NULL;
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range = &map->range[range_num];
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return map_sysmem(range->start, range->size);
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}
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int regmap_uninit(struct regmap *map)
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{
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if (map->range_count > 1)
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free(map->range);
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free(map);
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return 0;
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}
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int regmap_read(struct regmap *map, uint offset, uint *valp)
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{
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uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
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*valp = le32_to_cpu(readl(ptr));
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return 0;
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}
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int regmap_write(struct regmap *map, uint offset, uint val)
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{
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uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE);
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writel(cpu_to_le32(val), ptr);
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return 0;
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}
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