xref: /openbmc/u-boot/drivers/core/fdtaddr.c (revision d94604d5)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Device addresses
4  *
5  * Copyright (c) 2017 Google, Inc
6  *
7  * (C) Copyright 2012
8  * Pavel Herrmann <morpheus.ibis@gmail.com>
9  */
10 
11 #include <common.h>
12 #include <dm.h>
13 #include <fdt_support.h>
14 #include <asm/io.h>
15 #include <dm/device-internal.h>
16 
17 DECLARE_GLOBAL_DATA_PTR;
18 
devfdt_get_addr_index(struct udevice * dev,int index)19 fdt_addr_t devfdt_get_addr_index(struct udevice *dev, int index)
20 {
21 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
22 	fdt_addr_t addr;
23 
24 	if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
25 		const fdt32_t *reg;
26 		int len = 0;
27 		int na, ns;
28 
29 		na = fdt_address_cells(gd->fdt_blob,
30 				       dev_of_offset(dev->parent));
31 		if (na < 1) {
32 			debug("bad #address-cells\n");
33 			return FDT_ADDR_T_NONE;
34 		}
35 
36 		ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
37 		if (ns < 0) {
38 			debug("bad #size-cells\n");
39 			return FDT_ADDR_T_NONE;
40 		}
41 
42 		reg = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "reg",
43 				  &len);
44 		if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
45 			debug("Req index out of range\n");
46 			return FDT_ADDR_T_NONE;
47 		}
48 
49 		reg += index * (na + ns);
50 
51 		if (ns) {
52 			/*
53 			 * Use the full-fledged translate function for complex
54 			 * bus setups.
55 			 */
56 			addr = fdt_translate_address((void *)gd->fdt_blob,
57 						     dev_of_offset(dev), reg);
58 		} else {
59 			/* Non translatable if #size-cells == 0 */
60 			addr = fdt_read_number(reg, na);
61 		}
62 	} else {
63 		/*
64 		 * Use the "simple" translate function for less complex
65 		 * bus setups.
66 		 */
67 		addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
68 				dev_of_offset(dev->parent), dev_of_offset(dev),
69 				"reg", index, NULL, false);
70 		if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
71 			if (device_get_uclass_id(dev->parent) ==
72 			    UCLASS_SIMPLE_BUS)
73 				addr = simple_bus_translate(dev->parent, addr);
74 		}
75 	}
76 
77 	/*
78 	 * Some platforms need a special address translation. Those
79 	 * platforms (e.g. mvebu in SPL) can configure a translation
80 	 * offset in the DM by calling dm_set_translation_offset() that
81 	 * will get added to all addresses returned by devfdt_get_addr().
82 	 */
83 	addr += dm_get_translation_offset();
84 
85 	return addr;
86 #else
87 	return FDT_ADDR_T_NONE;
88 #endif
89 }
90 
devfdt_get_addr_size_index(struct udevice * dev,int index,fdt_size_t * size)91 fdt_addr_t devfdt_get_addr_size_index(struct udevice *dev, int index,
92 				   fdt_size_t *size)
93 {
94 #if CONFIG_IS_ENABLED(OF_CONTROL)
95 	/*
96 	 * Only get the size in this first call. We'll get the addr in the
97 	 * next call to the exisiting dev_get_xxx function which handles
98 	 * all config options.
99 	 */
100 	fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev),
101 					   "reg", index, size, false);
102 
103 	/*
104 	 * Get the base address via the existing function which handles
105 	 * all Kconfig cases
106 	 */
107 	return devfdt_get_addr_index(dev, index);
108 #else
109 	return FDT_ADDR_T_NONE;
110 #endif
111 }
112 
devfdt_get_addr_name(struct udevice * dev,const char * name)113 fdt_addr_t devfdt_get_addr_name(struct udevice *dev, const char *name)
114 {
115 #if CONFIG_IS_ENABLED(OF_CONTROL)
116 	int index;
117 
118 	index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
119 				      "reg-names", name);
120 	if (index < 0)
121 		return index;
122 
123 	return devfdt_get_addr_index(dev, index);
124 #else
125 	return FDT_ADDR_T_NONE;
126 #endif
127 }
128 
devfdt_get_addr(struct udevice * dev)129 fdt_addr_t devfdt_get_addr(struct udevice *dev)
130 {
131 	return devfdt_get_addr_index(dev, 0);
132 }
133 
devfdt_get_addr_ptr(struct udevice * dev)134 void *devfdt_get_addr_ptr(struct udevice *dev)
135 {
136 	return (void *)(uintptr_t)devfdt_get_addr_index(dev, 0);
137 }
138 
devfdt_remap_addr_index(struct udevice * dev,int index)139 void *devfdt_remap_addr_index(struct udevice *dev, int index)
140 {
141 	fdt_addr_t addr = devfdt_get_addr_index(dev, index);
142 
143 	if (addr == FDT_ADDR_T_NONE)
144 		return NULL;
145 
146 	return map_physmem(addr, 0, MAP_NOCACHE);
147 }
148 
devfdt_remap_addr_name(struct udevice * dev,const char * name)149 void *devfdt_remap_addr_name(struct udevice *dev, const char *name)
150 {
151 	fdt_addr_t addr = devfdt_get_addr_name(dev, name);
152 
153 	if (addr == FDT_ADDR_T_NONE)
154 		return NULL;
155 
156 	return map_physmem(addr, 0, MAP_NOCACHE);
157 }
158 
devfdt_remap_addr(struct udevice * dev)159 void *devfdt_remap_addr(struct udevice *dev)
160 {
161 	return devfdt_remap_addr_index(dev, 0);
162 }
163 
devfdt_map_physmem(struct udevice * dev,unsigned long size)164 void *devfdt_map_physmem(struct udevice *dev, unsigned long size)
165 {
166 	fdt_addr_t addr = devfdt_get_addr(dev);
167 
168 	if (addr == FDT_ADDR_T_NONE)
169 		return NULL;
170 
171 	return map_physmem(addr, size, MAP_NOCACHE);
172 }
173