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a821c4af79
These support the flat device tree. We want to use the dev_read_..() prefix for functions that support both flat tree and live tree. So rename the existing functions to avoid confusion. In the end we will have: 1. dev_read_addr...() - works on devices, supports flat/live tree 2. devfdt_get_addr...() - current functions, flat tree only 3. of_get_address() etc. - new functions, live tree only All drivers will be written to use 1. That function will in turn call either 2 or 3 depending on whether the flat or live tree is in use. Note this involves changing some dead code - the imx_lpi2c.c file. Signed-off-by: Simon Glass <sjg@chromium.org>
144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/*
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* Device addresses
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*
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* Copyright (c) 2017 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <fdt_support.h>
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#include <asm/io.h>
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#include <dm/device-internal.h>
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DECLARE_GLOBAL_DATA_PTR;
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fdt_addr_t devfdt_get_addr_index(struct udevice *dev, int index)
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{
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#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
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fdt_addr_t addr;
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if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
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const fdt32_t *reg;
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int len = 0;
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int na, ns;
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na = fdt_address_cells(gd->fdt_blob,
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dev_of_offset(dev->parent));
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if (na < 1) {
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debug("bad #address-cells\n");
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return FDT_ADDR_T_NONE;
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}
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ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
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if (ns < 0) {
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debug("bad #size-cells\n");
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return FDT_ADDR_T_NONE;
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}
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reg = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "reg",
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&len);
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if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
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debug("Req index out of range\n");
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return FDT_ADDR_T_NONE;
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}
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reg += index * (na + ns);
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/*
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* Use the full-fledged translate function for complex
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* bus setups.
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*/
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addr = fdt_translate_address((void *)gd->fdt_blob,
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dev_of_offset(dev), reg);
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} else {
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/*
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* Use the "simple" translate function for less complex
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* bus setups.
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*/
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addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
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dev_of_offset(dev->parent), dev_of_offset(dev),
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"reg", index, NULL, false);
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if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
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if (device_get_uclass_id(dev->parent) ==
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UCLASS_SIMPLE_BUS)
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addr = simple_bus_translate(dev->parent, addr);
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}
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}
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/*
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* Some platforms need a special address translation. Those
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* platforms (e.g. mvebu in SPL) can configure a translation
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* offset in the DM by calling dm_set_translation_offset() that
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* will get added to all addresses returned by devfdt_get_addr().
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*/
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addr += dm_get_translation_offset();
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return addr;
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#else
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return FDT_ADDR_T_NONE;
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#endif
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}
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fdt_addr_t devfdt_get_addr_size_index(struct udevice *dev, int index,
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fdt_size_t *size)
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{
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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/*
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* Only get the size in this first call. We'll get the addr in the
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* next call to the exisiting dev_get_xxx function which handles
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* all config options.
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*/
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fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev),
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"reg", index, size, false);
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/*
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* Get the base address via the existing function which handles
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* all Kconfig cases
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*/
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return devfdt_get_addr_index(dev, index);
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#else
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return FDT_ADDR_T_NONE;
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#endif
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}
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fdt_addr_t devfdt_get_addr_name(struct udevice *dev, const char *name)
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{
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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int index;
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index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
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"reg-names", name);
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if (index < 0)
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return index;
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return devfdt_get_addr_index(dev, index);
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#else
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return FDT_ADDR_T_NONE;
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#endif
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}
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fdt_addr_t devfdt_get_addr(struct udevice *dev)
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{
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return devfdt_get_addr_index(dev, 0);
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}
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void *devfdt_get_addr_ptr(struct udevice *dev)
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{
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return (void *)(uintptr_t)devfdt_get_addr_index(dev, 0);
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}
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void *devfdt_map_physmem(struct udevice *dev, unsigned long size)
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{
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fdt_addr_t addr = devfdt_get_addr(dev);
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if (addr == FDT_ADDR_T_NONE)
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return NULL;
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return map_physmem(addr, size, MAP_NOCACHE);
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}
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