• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2007
4  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5  */
6 
7 #ifndef __FDT_SUPPORT_H
8 #define __FDT_SUPPORT_H
9 
10 #ifdef CONFIG_OF_LIBFDT
11 
12 #include <linux/libfdt.h>
13 
14 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
15 				const char *prop, const u32 dflt);
16 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
17 				const char *prop, const u32 dflt);
18 
19 /**
20  * Add data to the root of the FDT before booting the OS.
21  *
22  * See doc/device-tree-bindings/root.txt
23  *
24  * @param fdt		FDT address in memory
25  * @return 0 if ok, or -FDT_ERR_... on error
26  */
27 int fdt_root(void *fdt);
28 
29 /**
30  * Add chosen data the FDT before booting the OS.
31  *
32  * In particular, this adds the kernel command line (bootargs) to the FDT.
33  *
34  * @param fdt		FDT address in memory
35  * @return 0 if ok, or -FDT_ERR_... on error
36  */
37 int fdt_chosen(void *fdt);
38 
39 /**
40  * Add initrd information to the FDT before booting the OS.
41  *
42  * @param fdt		FDT address in memory
43  * @return 0 if ok, or -FDT_ERR_... on error
44  */
45 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
46 
47 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
48 		      const void *val, int len, int create);
49 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
50 			  u32 val, int create);
51 
do_fixup_by_path_string(void * fdt,const char * path,const char * prop,const char * status)52 static inline void do_fixup_by_path_string(void *fdt, const char *path,
53 					   const char *prop, const char *status)
54 {
55 	do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
56 }
57 
58 void do_fixup_by_prop(void *fdt,
59 		      const char *pname, const void *pval, int plen,
60 		      const char *prop, const void *val, int len,
61 		      int create);
62 void do_fixup_by_prop_u32(void *fdt,
63 			  const char *pname, const void *pval, int plen,
64 			  const char *prop, u32 val, int create);
65 void do_fixup_by_compat(void *fdt, const char *compat,
66 			const char *prop, const void *val, int len, int create);
67 void do_fixup_by_compat_u32(void *fdt, const char *compat,
68 			    const char *prop, u32 val, int create);
69 /**
70  * Setup the memory node in the DT. Creates one if none was existing before.
71  * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
72  * whole memory.
73  *
74  * @param blob		FDT blob to update
75  * @param start		Begin of DRAM mapping in physical memory
76  * @param size		Size of the single memory bank
77  * @return 0 if ok, or -1 or -FDT_ERR_... on error
78  */
79 int fdt_fixup_memory(void *blob, u64 start, u64 size);
80 
81 /**
82  * Fill the DT memory node with multiple memory banks.
83  * Creates the node if none was existing before.
84  * If banks is 0, it will not touch the existing reg property. This allows
85  * boards to not mess with the existing DT setup, which may have been
86  * filled in properly before.
87  *
88  * @param blob		FDT blob to update
89  * @param start		Array of size <banks> to hold the start addresses.
90  * @param size		Array of size <banks> to hold the size of each region.
91  * @param banks		Number of memory banks to create. If 0, the reg
92  *			property will be left untouched.
93  * @return 0 if ok, or -1 or -FDT_ERR_... on error
94  */
95 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
96 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
97 #else
fdt_fixup_memory_banks(void * blob,u64 start[],u64 size[],int banks)98 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
99 					 int banks)
100 {
101 	return 0;
102 }
103 #endif
104 
105 void fdt_fixup_ethernet(void *fdt);
106 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
107 			 const void *val, int len, int create);
108 void fdt_fixup_qe_firmware(void *fdt);
109 
110 /**
111  * Update native-mode property of display-timings node to the phandle
112  * of the timings matching a display by name (case insensitive).
113  *
114  * see kernel Documentation/devicetree/bindings/video/display-timing.txt
115  *
116  * @param blob		FDT blob to update
117  * @param path		path within dt
118  * @param display	name of display timing to match
119  * @return 0 if ok, or -FDT_ERR_... on error
120  */
121 int fdt_fixup_display(void *blob, const char *path, const char *display);
122 
123 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
124 void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd);
125 #else
fsl_fdt_fixup_dr_usb(void * blob,bd_t * bd)126 static inline void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
127 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
128 
129 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
130 void fdt_fixup_crypto_node(void *blob, int sec_rev);
131 #else
fdt_fixup_crypto_node(void * blob,int sec_rev)132 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
133 #endif
134 
135 /**
136  * Record information about a processed loadable in /fit-images (creating
137  * /fit-images if necessary).
138  *
139  * @param blob		FDT blob to update
140  * @param index	        index of this loadable
141  * @param name          name of the loadable
142  * @param load_addr     address the loadable was loaded to
143  * @param size          number of bytes loaded
144  * @param entry_point   entry point (if specified, otherwise pass -1)
145  * @param type          type (if specified, otherwise pass NULL)
146  * @param os            os-type (if specified, otherwise pass NULL)
147  * @return 0 if ok, or -1 or -FDT_ERR_... on error
148  */
149 int fdt_record_loadable(void *blob, u32 index, const char *name,
150 			uintptr_t load_addr, u32 size, uintptr_t entry_point,
151 			const char *type, const char *os);
152 
153 #ifdef CONFIG_PCI
154 #include <pci.h>
155 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
156 #endif
157 
158 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
159 
160 /**
161  * Add board-specific data to the FDT before booting the OS.
162  *
163  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
164  * This function is called if CONFIG_OF_BOARD_SETUP is defined
165  *
166  * @param blob		FDT blob to update
167  * @param bd_t		Pointer to board data
168  * @return 0 if ok, or -FDT_ERR_... on error
169  */
170 int ft_board_setup(void *blob, bd_t *bd);
171 
172 /*
173  * The keystone2 SOC requires all 32 bit aliased addresses to be converted
174  * to their 36 physical format. This has to happen after all fdt nodes
175  * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
176  * called at the end of the image_setup_libfdt() is to do that convertion.
177  */
178 void ft_board_setup_ex(void *blob, bd_t *bd);
179 void ft_cpu_setup(void *blob, bd_t *bd);
180 void ft_pci_setup(void *blob, bd_t *bd);
181 
182 /**
183  * Add system-specific data to the FDT before booting the OS.
184  *
185  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
186  * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
187  *
188  * @param blob		FDT blob to update
189  * @param bd_t		Pointer to board data
190  * @return 0 if ok, or -FDT_ERR_... on error
191  */
192 int ft_system_setup(void *blob, bd_t *bd);
193 
194 void set_working_fdt_addr(ulong addr);
195 
196 /**
197  * shrink down the given blob to minimum size + some extrasize if required
198  *
199  * @param blob		FDT blob to update
200  * @param extrasize	additional bytes needed
201  * @return 0 if ok, or -FDT_ERR_... on error
202  */
203 int fdt_shrink_to_minimum(void *blob, uint extrasize);
204 int fdt_increase_size(void *fdt, int add_len);
205 
206 int fdt_fixup_nor_flash_size(void *blob);
207 
208 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
209 void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size);
210 #else
fdt_fixup_mtdparts(void * fdt,void * node_info,int node_info_size)211 static inline void fdt_fixup_mtdparts(void *fdt, void *node_info,
212 					int node_info_size) {}
213 #endif
214 
215 void fdt_del_node_and_alias(void *blob, const char *alias);
216 u64 fdt_translate_address(const void *blob, int node_offset,
217 			  const __be32 *in_addr);
218 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
219 					phys_addr_t compat_off);
220 int fdt_alloc_phandle(void *blob);
221 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
222 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
223 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
224 
225 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
226 			      u64 addr);
227 u64 fdt_get_base_address(const void *fdt, int node);
228 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
229 		   uint64_t *addr, uint64_t *len);
230 
231 enum fdt_status {
232 	FDT_STATUS_OKAY,
233 	FDT_STATUS_DISABLED,
234 	FDT_STATUS_FAIL,
235 	FDT_STATUS_FAIL_ERROR_CODE,
236 };
237 int fdt_set_node_status(void *fdt, int nodeoffset,
238 			enum fdt_status status, unsigned int error_code);
fdt_status_okay(void * fdt,int nodeoffset)239 static inline int fdt_status_okay(void *fdt, int nodeoffset)
240 {
241 	return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
242 }
fdt_status_disabled(void * fdt,int nodeoffset)243 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
244 {
245 	return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
246 }
fdt_status_fail(void * fdt,int nodeoffset)247 static inline int fdt_status_fail(void *fdt, int nodeoffset)
248 {
249 	return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
250 }
251 
252 int fdt_set_status_by_alias(void *fdt, const char *alias,
253 			    enum fdt_status status, unsigned int error_code);
fdt_status_okay_by_alias(void * fdt,const char * alias)254 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
255 {
256 	return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
257 }
fdt_status_disabled_by_alias(void * fdt,const char * alias)258 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
259 {
260 	return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
261 }
fdt_status_fail_by_alias(void * fdt,const char * alias)262 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
263 {
264 	return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
265 }
266 
267 /* Helper to read a big number; size is in cells (not bytes) */
fdt_read_number(const fdt32_t * cell,int size)268 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
269 {
270 	u64 r = 0;
271 	while (size--)
272 		r = (r << 32) | fdt32_to_cpu(*(cell++));
273 	return r;
274 }
275 
276 void fdt_support_default_count_cells(const void *blob, int parentoffset,
277 					int *addrc, int *sizec);
278 int ft_verify_fdt(void *fdt);
279 int arch_fixup_memory_node(void *blob);
280 
281 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
282 			    u32 height, u32 stride, const char *format);
283 
284 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
285 
286 #endif /* ifdef CONFIG_OF_LIBFDT */
287 
288 #ifdef USE_HOSTCC
289 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
290 		int default_val);
291 #endif
292 #ifdef CONFIG_FMAN_ENET
293 int fdt_update_ethernet_dt(void *blob);
294 #endif
295 #ifdef CONFIG_FSL_MC_ENET
296 void fdt_fixup_board_enet(void *blob);
297 #endif
298 #endif /* ifndef __FDT_SUPPORT_H */
299