| /* |
| * (C) Copyright 2007 |
| * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com |
| * |
| * Copyright 2010-2011 Freescale Semiconductor, Inc. |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <inttypes.h> |
| #include <stdio_dev.h> |
| #include <linux/ctype.h> |
| #include <linux/types.h> |
| #include <asm/global_data.h> |
| #include <libfdt.h> |
| #include <fdt_support.h> |
| #include <exports.h> |
| |
| /** |
| * fdt_getprop_u32_default_node - Return a node's property or a default |
| * |
| * @fdt: ptr to device tree |
| * @off: offset of node |
| * @cell: cell offset in property |
| * @prop: property name |
| * @dflt: default value if the property isn't found |
| * |
| * Convenience function to return a node's property or a default value if |
| * the property doesn't exist. |
| */ |
| u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, |
| const char *prop, const u32 dflt) |
| { |
| const fdt32_t *val; |
| int len; |
| |
| val = fdt_getprop(fdt, off, prop, &len); |
| |
| /* Check if property exists */ |
| if (!val) |
| return dflt; |
| |
| /* Check if property is long enough */ |
| if (len < ((cell + 1) * sizeof(uint32_t))) |
| return dflt; |
| |
| return fdt32_to_cpu(*val); |
| } |
| |
| /** |
| * fdt_getprop_u32_default - Find a node and return it's property or a default |
| * |
| * @fdt: ptr to device tree |
| * @path: path of node |
| * @prop: property name |
| * @dflt: default value if the property isn't found |
| * |
| * Convenience function to find a node and return it's property or a |
| * default value if it doesn't exist. |
| */ |
| u32 fdt_getprop_u32_default(const void *fdt, const char *path, |
| const char *prop, const u32 dflt) |
| { |
| int off; |
| |
| off = fdt_path_offset(fdt, path); |
| if (off < 0) |
| return dflt; |
| |
| return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); |
| } |
| |
| /** |
| * fdt_find_and_setprop: Find a node and set it's property |
| * |
| * @fdt: ptr to device tree |
| * @node: path of node |
| * @prop: property name |
| * @val: ptr to new value |
| * @len: length of new property value |
| * @create: flag to create the property if it doesn't exist |
| * |
| * Convenience function to directly set a property given the path to the node. |
| */ |
| int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, |
| const void *val, int len, int create) |
| { |
| int nodeoff = fdt_path_offset(fdt, node); |
| |
| if (nodeoff < 0) |
| return nodeoff; |
| |
| if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) |
| return 0; /* create flag not set; so exit quietly */ |
| |
| return fdt_setprop(fdt, nodeoff, prop, val, len); |
| } |
| |
| /** |
| * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node |
| * |
| * @fdt: pointer to the device tree blob |
| * @parentoffset: structure block offset of a node |
| * @name: name of the subnode to locate |
| * |
| * fdt_subnode_offset() finds a subnode of the node with a given name. |
| * If the subnode does not exist, it will be created. |
| */ |
| int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) |
| { |
| int offset; |
| |
| offset = fdt_subnode_offset(fdt, parentoffset, name); |
| |
| if (offset == -FDT_ERR_NOTFOUND) |
| offset = fdt_add_subnode(fdt, parentoffset, name); |
| |
| if (offset < 0) |
| printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); |
| |
| return offset; |
| } |
| |
| /* rename to CONFIG_OF_STDOUT_PATH ? */ |
| #if defined(OF_STDOUT_PATH) |
| static int fdt_fixup_stdout(void *fdt, int chosenoff) |
| { |
| return fdt_setprop(fdt, chosenoff, "linux,stdout-path", |
| OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); |
| } |
| #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) |
| static void fdt_fill_multisername(char *sername, size_t maxlen) |
| { |
| const char *outname = stdio_devices[stdout]->name; |
| |
| if (strcmp(outname, "serial") > 0) |
| strncpy(sername, outname, maxlen); |
| |
| /* eserial? */ |
| if (strcmp(outname + 1, "serial") > 0) |
| strncpy(sername, outname + 1, maxlen); |
| } |
| |
| static int fdt_fixup_stdout(void *fdt, int chosenoff) |
| { |
| int err; |
| int aliasoff; |
| char sername[9] = { 0 }; |
| const void *path; |
| int len; |
| char tmp[256]; /* long enough */ |
| |
| fdt_fill_multisername(sername, sizeof(sername) - 1); |
| if (!sername[0]) |
| sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); |
| |
| aliasoff = fdt_path_offset(fdt, "/aliases"); |
| if (aliasoff < 0) { |
| err = aliasoff; |
| goto error; |
| } |
| |
| path = fdt_getprop(fdt, aliasoff, sername, &len); |
| if (!path) { |
| err = len; |
| goto error; |
| } |
| |
| /* fdt_setprop may break "path" so we copy it to tmp buffer */ |
| memcpy(tmp, path, len); |
| |
| err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); |
| error: |
| if (err < 0) |
| printf("WARNING: could not set linux,stdout-path %s.\n", |
| fdt_strerror(err)); |
| |
| return err; |
| } |
| #else |
| static int fdt_fixup_stdout(void *fdt, int chosenoff) |
| { |
| return 0; |
| } |
| #endif |
| |
| static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, |
| uint64_t val, int is_u64) |
| { |
| if (is_u64) |
| return fdt_setprop_u64(fdt, nodeoffset, name, val); |
| else |
| return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); |
| } |
| |
| |
| int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) |
| { |
| int nodeoffset; |
| int err, j, total; |
| int is_u64; |
| uint64_t addr, size; |
| |
| /* just return if the size of initrd is zero */ |
| if (initrd_start == initrd_end) |
| return 0; |
| |
| /* find or create "/chosen" node. */ |
| nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); |
| if (nodeoffset < 0) |
| return nodeoffset; |
| |
| total = fdt_num_mem_rsv(fdt); |
| |
| /* |
| * Look for an existing entry and update it. If we don't find |
| * the entry, we will j be the next available slot. |
| */ |
| for (j = 0; j < total; j++) { |
| err = fdt_get_mem_rsv(fdt, j, &addr, &size); |
| if (addr == initrd_start) { |
| fdt_del_mem_rsv(fdt, j); |
| break; |
| } |
| } |
| |
| err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); |
| if (err < 0) { |
| printf("fdt_initrd: %s\n", fdt_strerror(err)); |
| return err; |
| } |
| |
| is_u64 = (fdt_address_cells(fdt, 0) == 2); |
| |
| err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", |
| (uint64_t)initrd_start, is_u64); |
| |
| if (err < 0) { |
| printf("WARNING: could not set linux,initrd-start %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", |
| (uint64_t)initrd_end, is_u64); |
| |
| if (err < 0) { |
| printf("WARNING: could not set linux,initrd-end %s.\n", |
| fdt_strerror(err)); |
| |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_INSTABOOT |
| #include <amlogic/instaboot.h> |
| |
| int fdt_instaboot(void *fdt) |
| { |
| int nodeoffset; |
| struct instaboot_info ib_info; |
| int err; |
| u32 tmp; |
| /* Find the "chosen" node. */ |
| nodeoffset = fdt_path_offset (fdt, "/chosen"); |
| |
| /* If there is no "chosen" node in the blob return */ |
| if (nodeoffset < 0) { |
| printf("fdt_instaboot: %s\n", fdt_strerror(nodeoffset)); |
| return nodeoffset; |
| } |
| |
| err = get_instaboot_header(&ib_info); |
| if (err < 0) { |
| printf("fdt_instaboot: no instaboot image\n"); |
| return err; |
| } |
| |
| err = fdt_setprop(fdt, nodeoffset, |
| "instaboot,sysname", ib_info.uts.sysname, |
| strlen(ib_info.uts.sysname)+1); |
| if (err < 0) { |
| printf("WARNING: could not set instaboot,sysname %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| err = fdt_setprop(fdt, nodeoffset, |
| "instaboot,release", ib_info.uts.release, |
| strlen(ib_info.uts.release)+1); |
| if (err < 0) { |
| printf("WARNING: could not set instaboot,release %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| err = fdt_setprop(fdt, nodeoffset, |
| "instaboot,version", ib_info.uts.version, |
| strlen(ib_info.uts.version)+1); |
| if (err < 0) { |
| printf("WARNING: could not set instaboot,version %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| err = fdt_setprop(fdt, nodeoffset, |
| "instaboot,machine", ib_info.uts.machine, |
| strlen(ib_info.uts.machine)+1); |
| if (err < 0) { |
| printf("WARNING: could not set instaboot,machine %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| tmp = __cpu_to_be32(ib_info.version_code); |
| err = fdt_setprop(fdt, nodeoffset, |
| "instaboot,version_code", &tmp, sizeof(tmp)); |
| if (err < 0) { |
| printf("WARNING: could not set instaboot,version_code %s.\n", |
| fdt_strerror(err)); |
| |
| return err; |
| } |
| return 0; |
| } |
| |
| #endif /* CONFIG_INSTABOOT */ |
| |
| int fdt_chosen(void *fdt) |
| { |
| int nodeoffset; |
| int err; |
| char *str; /* used to set string properties */ |
| |
| err = fdt_check_header(fdt); |
| if (err < 0) { |
| printf("fdt_chosen: %s\n", fdt_strerror(err)); |
| return err; |
| } |
| |
| /* find or create "/chosen" node. */ |
| nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); |
| if (nodeoffset < 0) |
| return nodeoffset; |
| |
| str = getenv("bootargs"); |
| if (str) { |
| err = fdt_setprop(fdt, nodeoffset, "bootargs", str, |
| strlen(str) + 1); |
| if (err < 0) { |
| printf("WARNING: could not set bootargs %s.\n", |
| fdt_strerror(err)); |
| return err; |
| } |
| } |
| |
| return fdt_fixup_stdout(fdt, nodeoffset); |
| } |
| |
| void do_fixup_by_path(void *fdt, const char *path, const char *prop, |
| const void *val, int len, int create) |
| { |
| #if defined(DEBUG) |
| int i; |
| debug("Updating property '%s/%s' = ", path, prop); |
| for (i = 0; i < len; i++) |
| debug(" %.2x", *(u8*)(val+i)); |
| debug("\n"); |
| #endif |
| int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); |
| if (rc) |
| printf("Unable to update property %s:%s, err=%s\n", |
| path, prop, fdt_strerror(rc)); |
| } |
| |
| void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, |
| u32 val, int create) |
| { |
| fdt32_t tmp = cpu_to_fdt32(val); |
| do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); |
| } |
| |
| void do_fixup_by_prop(void *fdt, |
| const char *pname, const void *pval, int plen, |
| const char *prop, const void *val, int len, |
| int create) |
| { |
| int off; |
| #if defined(DEBUG) |
| int i; |
| debug("Updating property '%s' = ", prop); |
| for (i = 0; i < len; i++) |
| debug(" %.2x", *(u8*)(val+i)); |
| debug("\n"); |
| #endif |
| off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); |
| while (off != -FDT_ERR_NOTFOUND) { |
| if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
| fdt_setprop(fdt, off, prop, val, len); |
| off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); |
| } |
| } |
| |
| void do_fixup_by_prop_u32(void *fdt, |
| const char *pname, const void *pval, int plen, |
| const char *prop, u32 val, int create) |
| { |
| fdt32_t tmp = cpu_to_fdt32(val); |
| do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); |
| } |
| |
| void do_fixup_by_compat(void *fdt, const char *compat, |
| const char *prop, const void *val, int len, int create) |
| { |
| int off = -1; |
| #if defined(DEBUG) |
| int i; |
| debug("Updating property '%s' = ", prop); |
| for (i = 0; i < len; i++) |
| debug(" %.2x", *(u8*)(val+i)); |
| debug("\n"); |
| #endif |
| off = fdt_node_offset_by_compatible(fdt, -1, compat); |
| while (off != -FDT_ERR_NOTFOUND) { |
| if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
| fdt_setprop(fdt, off, prop, val, len); |
| off = fdt_node_offset_by_compatible(fdt, off, compat); |
| } |
| } |
| |
| void do_fixup_by_compat_u32(void *fdt, const char *compat, |
| const char *prop, u32 val, int create) |
| { |
| fdt32_t tmp = cpu_to_fdt32(val); |
| do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); |
| } |
| |
| /* |
| * fdt_pack_reg - pack address and size array into the "reg"-suitable stream |
| */ |
| static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, |
| int n) |
| { |
| int i; |
| int address_cells = fdt_address_cells(fdt, 0); |
| int size_cells = fdt_size_cells(fdt, 0); |
| char *p = buf; |
| |
| for (i = 0; i < n; i++) { |
| if (address_cells == 2) |
| *(fdt64_t *)p = cpu_to_fdt64(address[i]); |
| else |
| *(fdt32_t *)p = cpu_to_fdt32(address[i]); |
| p += 4 * address_cells; |
| |
| if (size_cells == 2) |
| *(fdt64_t *)p = cpu_to_fdt64(size[i]); |
| else |
| *(fdt32_t *)p = cpu_to_fdt32(size[i]); |
| p += 4 * size_cells; |
| } |
| |
| return p - (char *)buf; |
| } |
| |
| #ifdef CONFIG_NR_DRAM_BANKS |
| #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS |
| #else |
| #define MEMORY_BANKS_MAX 4 |
| #endif |
| int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) |
| { |
| int err, nodeoffset; |
| int len; |
| u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ |
| |
| if (banks > MEMORY_BANKS_MAX) { |
| printf("%s: num banks %d exceeds hardcoded limit %d." |
| " Recompile with higher MEMORY_BANKS_MAX?\n", |
| __FUNCTION__, banks, MEMORY_BANKS_MAX); |
| return -1; |
| } |
| |
| err = fdt_check_header(blob); |
| if (err < 0) { |
| printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); |
| return err; |
| } |
| |
| /* find or create "/memory" node. */ |
| nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); |
| if (nodeoffset < 0) |
| return nodeoffset; |
| |
| err = fdt_setprop(blob, nodeoffset, "device_type", "memory", |
| sizeof("memory")); |
| if (err < 0) { |
| printf("WARNING: could not set %s %s.\n", "device_type", |
| fdt_strerror(err)); |
| return err; |
| } |
| |
| len = fdt_pack_reg(blob, tmp, start, size, banks); |
| |
| err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); |
| if (err < 0) { |
| printf("WARNING: could not set %s %s.\n", |
| "reg", fdt_strerror(err)); |
| return err; |
| } |
| return 0; |
| } |
| |
| int fdt_fixup_memory(void *blob, u64 start, u64 size) |
| { |
| return fdt_fixup_memory_banks(blob, &start, &size, 1); |
| } |
| |
| void fdt_fixup_ethernet(void *fdt) |
| { |
| int node, i, j; |
| char enet[16], *tmp, *end; |
| char mac[16]; |
| const char *path; |
| unsigned char mac_addr[6]; |
| |
| node = fdt_path_offset(fdt, "/aliases"); |
| if (node < 0) |
| return; |
| |
| if (!getenv("ethaddr")) { |
| if (getenv("usbethaddr")) { |
| strcpy(mac, "usbethaddr"); |
| } else { |
| debug("No ethernet MAC Address defined\n"); |
| return; |
| } |
| } else { |
| strcpy(mac, "ethaddr"); |
| } |
| |
| i = 0; |
| while ((tmp = getenv(mac)) != NULL) { |
| sprintf(enet, "ethernet%d", i); |
| path = fdt_getprop(fdt, node, enet, NULL); |
| if (!path) { |
| debug("No alias for %s\n", enet); |
| sprintf(mac, "eth%daddr", ++i); |
| continue; |
| } |
| |
| for (j = 0; j < 6; j++) { |
| mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; |
| if (tmp) |
| tmp = (*end) ? end+1 : end; |
| } |
| |
| do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); |
| do_fixup_by_path(fdt, path, "local-mac-address", |
| &mac_addr, 6, 1); |
| |
| sprintf(mac, "eth%daddr", ++i); |
| } |
| } |
| |
| /* Resize the fdt to its actual size + a bit of padding */ |
| int fdt_shrink_to_minimum(void *blob) |
| { |
| int i; |
| uint64_t addr, size; |
| int total, ret; |
| uint actualsize; |
| |
| if (!blob) |
| return 0; |
| |
| total = fdt_num_mem_rsv(blob); |
| for (i = 0; i < total; i++) { |
| fdt_get_mem_rsv(blob, i, &addr, &size); |
| if (addr == (uintptr_t)blob) { |
| fdt_del_mem_rsv(blob, i); |
| break; |
| } |
| } |
| |
| /* |
| * Calculate the actual size of the fdt |
| * plus the size needed for 5 fdt_add_mem_rsv, one |
| * for the fdt itself and 4 for a possible initrd |
| * ((initrd-start + initrd-end) * 2 (name & value)) |
| */ |
| actualsize = fdt_off_dt_strings(blob) + |
| fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); |
| |
| /* Make it so the fdt ends on a page boundary */ |
| actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); |
| actualsize = actualsize - ((uintptr_t)blob & 0xfff); |
| |
| /* Change the fdt header to reflect the correct size */ |
| fdt_set_totalsize(blob, actualsize); |
| |
| /* Add the new reservation */ |
| ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); |
| if (ret < 0) |
| return ret; |
| |
| return actualsize; |
| } |
| |
| #ifdef CONFIG_PCI |
| #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 |
| |
| #define FDT_PCI_PREFETCH (0x40000000) |
| #define FDT_PCI_MEM32 (0x02000000) |
| #define FDT_PCI_IO (0x01000000) |
| #define FDT_PCI_MEM64 (0x03000000) |
| |
| int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { |
| |
| int addrcell, sizecell, len, r; |
| u32 *dma_range; |
| /* sized based on pci addr cells, size-cells, & address-cells */ |
| u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; |
| |
| addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); |
| sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); |
| |
| dma_range = &dma_ranges[0]; |
| for (r = 0; r < hose->region_count; r++) { |
| u64 bus_start, phys_start, size; |
| |
| /* skip if !PCI_REGION_SYS_MEMORY */ |
| if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) |
| continue; |
| |
| bus_start = (u64)hose->regions[r].bus_start; |
| phys_start = (u64)hose->regions[r].phys_start; |
| size = (u64)hose->regions[r].size; |
| |
| dma_range[0] = 0; |
| if (size >= 0x100000000ull) |
| dma_range[0] |= FDT_PCI_MEM64; |
| else |
| dma_range[0] |= FDT_PCI_MEM32; |
| if (hose->regions[r].flags & PCI_REGION_PREFETCH) |
| dma_range[0] |= FDT_PCI_PREFETCH; |
| #ifdef CONFIG_SYS_PCI_64BIT |
| dma_range[1] = bus_start >> 32; |
| #else |
| dma_range[1] = 0; |
| #endif |
| dma_range[2] = bus_start & 0xffffffff; |
| |
| if (addrcell == 2) { |
| dma_range[3] = phys_start >> 32; |
| dma_range[4] = phys_start & 0xffffffff; |
| } else { |
| dma_range[3] = phys_start & 0xffffffff; |
| } |
| |
| if (sizecell == 2) { |
| dma_range[3 + addrcell + 0] = size >> 32; |
| dma_range[3 + addrcell + 1] = size & 0xffffffff; |
| } else { |
| dma_range[3 + addrcell + 0] = size & 0xffffffff; |
| } |
| |
| dma_range += (3 + addrcell + sizecell); |
| } |
| |
| len = dma_range - &dma_ranges[0]; |
| if (len) |
| fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); |
| |
| return 0; |
| } |
| #endif |
| |
| #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE |
| /* |
| * Provide a weak default function to return the flash bank size. |
| * There might be multiple non-identical flash chips connected to one |
| * chip-select, so we need to pass an index as well. |
| */ |
| u32 __flash_get_bank_size(int cs, int idx) |
| { |
| extern flash_info_t flash_info[]; |
| |
| /* |
| * As default, a simple 1:1 mapping is provided. Boards with |
| * a different mapping need to supply a board specific mapping |
| * routine. |
| */ |
| return flash_info[cs].size; |
| } |
| u32 flash_get_bank_size(int cs, int idx) |
| __attribute__((weak, alias("__flash_get_bank_size"))); |
| |
| /* |
| * This function can be used to update the size in the "reg" property |
| * of all NOR FLASH device nodes. This is necessary for boards with |
| * non-fixed NOR FLASH sizes. |
| */ |
| int fdt_fixup_nor_flash_size(void *blob) |
| { |
| char compat[][16] = { "cfi-flash", "jedec-flash" }; |
| int off; |
| int len; |
| struct fdt_property *prop; |
| u32 *reg, *reg2; |
| int i; |
| |
| for (i = 0; i < 2; i++) { |
| off = fdt_node_offset_by_compatible(blob, -1, compat[i]); |
| while (off != -FDT_ERR_NOTFOUND) { |
| int idx; |
| |
| /* |
| * Found one compatible node, so fixup the size |
| * int its reg properties |
| */ |
| prop = fdt_get_property_w(blob, off, "reg", &len); |
| if (prop) { |
| int tuple_size = 3 * sizeof(reg); |
| |
| /* |
| * There might be multiple reg-tuples, |
| * so loop through them all |
| */ |
| reg = reg2 = (u32 *)&prop->data[0]; |
| for (idx = 0; idx < (len / tuple_size); idx++) { |
| /* |
| * Update size in reg property |
| */ |
| reg[2] = flash_get_bank_size(reg[0], |
| idx); |
| |
| /* |
| * Point to next reg tuple |
| */ |
| reg += 3; |
| } |
| |
| fdt_setprop(blob, off, "reg", reg2, len); |
| } |
| |
| /* Move to next compatible node */ |
| off = fdt_node_offset_by_compatible(blob, off, |
| compat[i]); |
| } |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| int fdt_increase_size(void *fdt, int add_len) |
| { |
| int newlen; |
| |
| newlen = fdt_totalsize(fdt) + add_len; |
| |
| /* Open in place with a new len */ |
| return fdt_open_into(fdt, fdt, newlen); |
| } |
| |
| #ifdef CONFIG_FDT_FIXUP_PARTITIONS |
| #include <jffs2/load_kernel.h> |
| #include <mtd_node.h> |
| |
| struct reg_cell { |
| unsigned int r0; |
| unsigned int r1; |
| }; |
| |
| int fdt_del_subnodes(const void *blob, int parent_offset) |
| { |
| int off, ndepth; |
| int ret; |
| |
| for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); |
| (off >= 0) && (ndepth > 0); |
| off = fdt_next_node(blob, off, &ndepth)) { |
| if (ndepth == 1) { |
| debug("delete %s: offset: %x\n", |
| fdt_get_name(blob, off, 0), off); |
| ret = fdt_del_node((void *)blob, off); |
| if (ret < 0) { |
| printf("Can't delete node: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } else { |
| ndepth = 0; |
| off = parent_offset; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| int fdt_del_partitions(void *blob, int parent_offset) |
| { |
| const void *prop; |
| int ndepth = 0; |
| int off; |
| int ret; |
| |
| off = fdt_next_node(blob, parent_offset, &ndepth); |
| if (off > 0 && ndepth == 1) { |
| prop = fdt_getprop(blob, off, "label", NULL); |
| if (prop == NULL) { |
| /* |
| * Could not find label property, nand {}; node? |
| * Check subnode, delete partitions there if any. |
| */ |
| return fdt_del_partitions(blob, off); |
| } else { |
| ret = fdt_del_subnodes(blob, parent_offset); |
| if (ret < 0) { |
| printf("Can't remove subnodes: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| int fdt_node_set_part_info(void *blob, int parent_offset, |
| struct mtd_device *dev) |
| { |
| struct list_head *pentry; |
| struct part_info *part; |
| struct reg_cell cell; |
| int off, ndepth = 0; |
| int part_num, ret; |
| char buf[64]; |
| |
| ret = fdt_del_partitions(blob, parent_offset); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Check if it is nand {}; subnode, adjust |
| * the offset in this case |
| */ |
| off = fdt_next_node(blob, parent_offset, &ndepth); |
| if (off > 0 && ndepth == 1) |
| parent_offset = off; |
| |
| part_num = 0; |
| list_for_each_prev(pentry, &dev->parts) { |
| int newoff; |
| |
| part = list_entry(pentry, struct part_info, link); |
| |
| debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", |
| part_num, part->name, part->size, |
| part->offset, part->mask_flags); |
| |
| sprintf(buf, "partition@%llx", part->offset); |
| add_sub: |
| ret = fdt_add_subnode(blob, parent_offset, buf); |
| if (ret == -FDT_ERR_NOSPACE) { |
| ret = fdt_increase_size(blob, 512); |
| if (!ret) |
| goto add_sub; |
| else |
| goto err_size; |
| } else if (ret < 0) { |
| printf("Can't add partition node: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| newoff = ret; |
| |
| /* Check MTD_WRITEABLE_CMD flag */ |
| if (part->mask_flags & 1) { |
| add_ro: |
| ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); |
| if (ret == -FDT_ERR_NOSPACE) { |
| ret = fdt_increase_size(blob, 512); |
| if (!ret) |
| goto add_ro; |
| else |
| goto err_size; |
| } else if (ret < 0) |
| goto err_prop; |
| } |
| |
| cell.r0 = cpu_to_fdt32(part->offset); |
| cell.r1 = cpu_to_fdt32(part->size); |
| add_reg: |
| ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); |
| if (ret == -FDT_ERR_NOSPACE) { |
| ret = fdt_increase_size(blob, 512); |
| if (!ret) |
| goto add_reg; |
| else |
| goto err_size; |
| } else if (ret < 0) |
| goto err_prop; |
| |
| add_label: |
| ret = fdt_setprop_string(blob, newoff, "label", part->name); |
| if (ret == -FDT_ERR_NOSPACE) { |
| ret = fdt_increase_size(blob, 512); |
| if (!ret) |
| goto add_label; |
| else |
| goto err_size; |
| } else if (ret < 0) |
| goto err_prop; |
| |
| part_num++; |
| } |
| return 0; |
| err_size: |
| printf("Can't increase blob size: %s\n", fdt_strerror(ret)); |
| return ret; |
| err_prop: |
| printf("Can't add property: %s\n", fdt_strerror(ret)); |
| return ret; |
| } |
| |
| /* |
| * Update partitions in nor/nand nodes using info from |
| * mtdparts environment variable. The nodes to update are |
| * specified by node_info structure which contains mtd device |
| * type and compatible string: E. g. the board code in |
| * ft_board_setup() could use: |
| * |
| * struct node_info nodes[] = { |
| * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, |
| * { "cfi-flash", MTD_DEV_TYPE_NOR, }, |
| * }; |
| * |
| * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); |
| */ |
| void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) |
| { |
| struct node_info *ni = node_info; |
| struct mtd_device *dev; |
| char *parts; |
| int i, idx; |
| int noff; |
| |
| parts = getenv("mtdparts"); |
| if (!parts) |
| return; |
| |
| if (mtdparts_init() != 0) |
| return; |
| |
| for (i = 0; i < node_info_size; i++) { |
| idx = 0; |
| noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); |
| while (noff != -FDT_ERR_NOTFOUND) { |
| debug("%s: %s, mtd dev type %d\n", |
| fdt_get_name(blob, noff, 0), |
| ni[i].compat, ni[i].type); |
| dev = device_find(ni[i].type, idx++); |
| if (dev) { |
| if (fdt_node_set_part_info(blob, noff, dev)) |
| return; /* return on error */ |
| } |
| |
| /* Jump to next flash node */ |
| noff = fdt_node_offset_by_compatible(blob, noff, |
| ni[i].compat); |
| } |
| } |
| } |
| #endif |
| |
| void fdt_del_node_and_alias(void *blob, const char *alias) |
| { |
| int off = fdt_path_offset(blob, alias); |
| |
| if (off < 0) |
| return; |
| |
| fdt_del_node(blob, off); |
| |
| off = fdt_path_offset(blob, "/aliases"); |
| fdt_delprop(blob, off, alias); |
| } |
| |
| /* Max address size we deal with */ |
| #define OF_MAX_ADDR_CELLS 4 |
| #define OF_BAD_ADDR ((u64)-1) |
| #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ |
| (ns) > 0) |
| |
| /* Debug utility */ |
| #ifdef DEBUG |
| static void of_dump_addr(const char *s, const fdt32_t *addr, int na) |
| { |
| printf("%s", s); |
| while(na--) |
| printf(" %08x", *(addr++)); |
| printf("\n"); |
| } |
| #else |
| static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } |
| #endif |
| |
| /* Callbacks for bus specific translators */ |
| struct of_bus { |
| const char *name; |
| const char *addresses; |
| void (*count_cells)(void *blob, int parentoffset, |
| int *addrc, int *sizec); |
| u64 (*map)(fdt32_t *addr, const fdt32_t *range, |
| int na, int ns, int pna); |
| int (*translate)(fdt32_t *addr, u64 offset, int na); |
| }; |
| |
| /* Default translator (generic bus) */ |
| void of_bus_default_count_cells(void *blob, int parentoffset, |
| int *addrc, int *sizec) |
| { |
| const fdt32_t *prop; |
| |
| if (addrc) |
| *addrc = fdt_address_cells(blob, parentoffset); |
| |
| if (sizec) { |
| prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); |
| if (prop) |
| *sizec = be32_to_cpup(prop); |
| else |
| *sizec = 1; |
| } |
| } |
| |
| static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, |
| int na, int ns, int pna) |
| { |
| u64 cp, s, da; |
| |
| cp = of_read_number(range, na); |
| s = of_read_number(range + na + pna, ns); |
| da = of_read_number(addr, na); |
| |
| debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 |
| ", da=%" PRIu64 "\n", cp, s, da); |
| |
| if (da < cp || da >= (cp + s)) |
| return OF_BAD_ADDR; |
| return da - cp; |
| } |
| |
| static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) |
| { |
| u64 a = of_read_number(addr, na); |
| memset(addr, 0, na * 4); |
| a += offset; |
| if (na > 1) |
| addr[na - 2] = cpu_to_fdt32(a >> 32); |
| addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); |
| |
| return 0; |
| } |
| |
| /* Array of bus specific translators */ |
| static struct of_bus of_busses[] = { |
| /* Default */ |
| { |
| .name = "default", |
| .addresses = "reg", |
| .count_cells = of_bus_default_count_cells, |
| .map = of_bus_default_map, |
| .translate = of_bus_default_translate, |
| }, |
| }; |
| |
| static int of_translate_one(void * blob, int parent, struct of_bus *bus, |
| struct of_bus *pbus, fdt32_t *addr, |
| int na, int ns, int pna, const char *rprop) |
| { |
| const fdt32_t *ranges; |
| int rlen; |
| int rone; |
| u64 offset = OF_BAD_ADDR; |
| |
| /* Normally, an absence of a "ranges" property means we are |
| * crossing a non-translatable boundary, and thus the addresses |
| * below the current not cannot be converted to CPU physical ones. |
| * Unfortunately, while this is very clear in the spec, it's not |
| * what Apple understood, and they do have things like /uni-n or |
| * /ht nodes with no "ranges" property and a lot of perfectly |
| * useable mapped devices below them. Thus we treat the absence of |
| * "ranges" as equivalent to an empty "ranges" property which means |
| * a 1:1 translation at that level. It's up to the caller not to try |
| * to translate addresses that aren't supposed to be translated in |
| * the first place. --BenH. |
| */ |
| ranges = fdt_getprop(blob, parent, rprop, &rlen); |
| if (ranges == NULL || rlen == 0) { |
| offset = of_read_number(addr, na); |
| memset(addr, 0, pna * 4); |
| debug("OF: no ranges, 1:1 translation\n"); |
| goto finish; |
| } |
| |
| debug("OF: walking ranges...\n"); |
| |
| /* Now walk through the ranges */ |
| rlen /= 4; |
| rone = na + pna + ns; |
| for (; rlen >= rone; rlen -= rone, ranges += rone) { |
| offset = bus->map(addr, ranges, na, ns, pna); |
| if (offset != OF_BAD_ADDR) |
| break; |
| } |
| if (offset == OF_BAD_ADDR) { |
| debug("OF: not found !\n"); |
| return 1; |
| } |
| memcpy(addr, ranges + na, 4 * pna); |
| |
| finish: |
| of_dump_addr("OF: parent translation for:", addr, pna); |
| debug("OF: with offset: %" PRIu64 "\n", offset); |
| |
| /* Translate it into parent bus space */ |
| return pbus->translate(addr, offset, pna); |
| } |
| |
| /* |
| * Translate an address from the device-tree into a CPU physical address, |
| * this walks up the tree and applies the various bus mappings on the |
| * way. |
| * |
| * Note: We consider that crossing any level with #size-cells == 0 to mean |
| * that translation is impossible (that is we are not dealing with a value |
| * that can be mapped to a cpu physical address). This is not really specified |
| * that way, but this is traditionally the way IBM at least do things |
| */ |
| static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, |
| const char *rprop) |
| { |
| int parent; |
| struct of_bus *bus, *pbus; |
| fdt32_t addr[OF_MAX_ADDR_CELLS]; |
| int na, ns, pna, pns; |
| u64 result = OF_BAD_ADDR; |
| |
| debug("OF: ** translation for device %s **\n", |
| fdt_get_name(blob, node_offset, NULL)); |
| |
| /* Get parent & match bus type */ |
| parent = fdt_parent_offset(blob, node_offset); |
| if (parent < 0) |
| goto bail; |
| bus = &of_busses[0]; |
| |
| /* Cound address cells & copy address locally */ |
| bus->count_cells(blob, parent, &na, &ns); |
| if (!OF_CHECK_COUNTS(na, ns)) { |
| printf("%s: Bad cell count for %s\n", __FUNCTION__, |
| fdt_get_name(blob, node_offset, NULL)); |
| goto bail; |
| } |
| memcpy(addr, in_addr, na * 4); |
| |
| debug("OF: bus is %s (na=%d, ns=%d) on %s\n", |
| bus->name, na, ns, fdt_get_name(blob, parent, NULL)); |
| of_dump_addr("OF: translating address:", addr, na); |
| |
| /* Translate */ |
| for (;;) { |
| /* Switch to parent bus */ |
| node_offset = parent; |
| parent = fdt_parent_offset(blob, node_offset); |
| |
| /* If root, we have finished */ |
| if (parent < 0) { |
| debug("OF: reached root node\n"); |
| result = of_read_number(addr, na); |
| break; |
| } |
| |
| /* Get new parent bus and counts */ |
| pbus = &of_busses[0]; |
| pbus->count_cells(blob, parent, &pna, &pns); |
| if (!OF_CHECK_COUNTS(pna, pns)) { |
| printf("%s: Bad cell count for %s\n", __FUNCTION__, |
| fdt_get_name(blob, node_offset, NULL)); |
| break; |
| } |
| |
| debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", |
| pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); |
| |
| /* Apply bus translation */ |
| if (of_translate_one(blob, node_offset, bus, pbus, |
| addr, na, ns, pna, rprop)) |
| break; |
| |
| /* Complete the move up one level */ |
| na = pna; |
| ns = pns; |
| bus = pbus; |
| |
| of_dump_addr("OF: one level translation:", addr, na); |
| } |
| bail: |
| |
| return result; |
| } |
| |
| u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) |
| { |
| return __of_translate_address(blob, node_offset, in_addr, "ranges"); |
| } |
| |
| /** |
| * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and |
| * who's reg property matches a physical cpu address |
| * |
| * @blob: ptr to device tree |
| * @compat: compatiable string to match |
| * @compat_off: property name |
| * |
| */ |
| int fdt_node_offset_by_compat_reg(void *blob, const char *compat, |
| phys_addr_t compat_off) |
| { |
| int len, off = fdt_node_offset_by_compatible(blob, -1, compat); |
| while (off != -FDT_ERR_NOTFOUND) { |
| const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); |
| if (reg) { |
| if (compat_off == fdt_translate_address(blob, off, reg)) |
| return off; |
| } |
| off = fdt_node_offset_by_compatible(blob, off, compat); |
| } |
| |
| return -FDT_ERR_NOTFOUND; |
| } |
| |
| /** |
| * fdt_alloc_phandle: Return next free phandle value |
| * |
| * @blob: ptr to device tree |
| */ |
| int fdt_alloc_phandle(void *blob) |
| { |
| int offset; |
| uint32_t phandle = 0; |
| |
| for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; |
| offset = fdt_next_node(blob, offset, NULL)) { |
| phandle = max(phandle, fdt_get_phandle(blob, offset)); |
| } |
| |
| return phandle + 1; |
| } |
| |
| /* |
| * fdt_set_phandle: Create a phandle property for the given node |
| * |
| * @fdt: ptr to device tree |
| * @nodeoffset: node to update |
| * @phandle: phandle value to set (must be unique) |
| */ |
| int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) |
| { |
| int ret; |
| |
| #ifdef DEBUG |
| int off = fdt_node_offset_by_phandle(fdt, phandle); |
| |
| if ((off >= 0) && (off != nodeoffset)) { |
| char buf[64]; |
| |
| fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); |
| printf("Trying to update node %s with phandle %u ", |
| buf, phandle); |
| |
| fdt_get_path(fdt, off, buf, sizeof(buf)); |
| printf("that already exists in node %s.\n", buf); |
| return -FDT_ERR_BADPHANDLE; |
| } |
| #endif |
| |
| ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * For now, also set the deprecated "linux,phandle" property, so that we |
| * don't break older kernels. |
| */ |
| ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); |
| |
| return ret; |
| } |
| |
| /* |
| * fdt_create_phandle: Create a phandle property for the given node |
| * |
| * @fdt: ptr to device tree |
| * @nodeoffset: node to update |
| */ |
| unsigned int fdt_create_phandle(void *fdt, int nodeoffset) |
| { |
| /* see if there is a phandle already */ |
| int phandle = fdt_get_phandle(fdt, nodeoffset); |
| |
| /* if we got 0, means no phandle so create one */ |
| if (phandle == 0) { |
| int ret; |
| |
| phandle = fdt_alloc_phandle(fdt); |
| ret = fdt_set_phandle(fdt, nodeoffset, phandle); |
| if (ret < 0) { |
| printf("Can't set phandle %u: %s\n", phandle, |
| fdt_strerror(ret)); |
| return 0; |
| } |
| } |
| |
| return phandle; |
| } |
| |
| /* |
| * fdt_set_node_status: Set status for the given node |
| * |
| * @fdt: ptr to device tree |
| * @nodeoffset: node to update |
| * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, |
| * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE |
| * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE |
| */ |
| int fdt_set_node_status(void *fdt, int nodeoffset, |
| enum fdt_status status, unsigned int error_code) |
| { |
| char buf[16]; |
| int ret = 0; |
| |
| if (nodeoffset < 0) |
| return nodeoffset; |
| |
| switch (status) { |
| case FDT_STATUS_OKAY: |
| ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); |
| break; |
| case FDT_STATUS_DISABLED: |
| ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); |
| break; |
| case FDT_STATUS_FAIL: |
| ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); |
| break; |
| case FDT_STATUS_FAIL_ERROR_CODE: |
| sprintf(buf, "fail-%d", error_code); |
| ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); |
| break; |
| default: |
| printf("Invalid fdt status: %x\n", status); |
| ret = -1; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * fdt_set_status_by_alias: Set status for the given node given an alias |
| * |
| * @fdt: ptr to device tree |
| * @alias: alias of node to update |
| * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, |
| * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE |
| * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE |
| */ |
| int fdt_set_status_by_alias(void *fdt, const char* alias, |
| enum fdt_status status, unsigned int error_code) |
| { |
| int offset = fdt_path_offset(fdt, alias); |
| |
| return fdt_set_node_status(fdt, offset, status, error_code); |
| } |
| |
| #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) |
| int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) |
| { |
| int noff; |
| int ret; |
| |
| noff = fdt_node_offset_by_compatible(blob, -1, compat); |
| if (noff != -FDT_ERR_NOTFOUND) { |
| debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); |
| add_edid: |
| ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); |
| if (ret == -FDT_ERR_NOSPACE) { |
| ret = fdt_increase_size(blob, 512); |
| if (!ret) |
| goto add_edid; |
| else |
| goto err_size; |
| } else if (ret < 0) { |
| printf("Can't add property: %s\n", fdt_strerror(ret)); |
| return ret; |
| } |
| } |
| return 0; |
| err_size: |
| printf("Can't increase blob size: %s\n", fdt_strerror(ret)); |
| return ret; |
| } |
| #endif |
| |
| /* |
| * Verify the physical address of device tree node for a given alias |
| * |
| * This function locates the device tree node of a given alias, and then |
| * verifies that the physical address of that device matches the given |
| * parameter. It displays a message if there is a mismatch. |
| * |
| * Returns 1 on success, 0 on failure |
| */ |
| int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) |
| { |
| const char *path; |
| const fdt32_t *reg; |
| int node, len; |
| u64 dt_addr; |
| |
| path = fdt_getprop(fdt, anode, alias, NULL); |
| if (!path) { |
| /* If there's no such alias, then it's not a failure */ |
| return 1; |
| } |
| |
| node = fdt_path_offset(fdt, path); |
| if (node < 0) { |
| printf("Warning: device tree alias '%s' points to invalid " |
| "node %s.\n", alias, path); |
| return 0; |
| } |
| |
| reg = fdt_getprop(fdt, node, "reg", &len); |
| if (!reg) { |
| printf("Warning: device tree node '%s' has no address.\n", |
| path); |
| return 0; |
| } |
| |
| dt_addr = fdt_translate_address(fdt, node, reg); |
| if (addr != dt_addr) { |
| printf("Warning: U-Boot configured device %s at address %" |
| PRIx64 ",\n but the device tree has it address %" |
| PRIx64 ".\n", alias, addr, dt_addr); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* |
| * Returns the base address of an SOC or PCI node |
| */ |
| u64 fdt_get_base_address(void *fdt, int node) |
| { |
| int size; |
| u32 naddr; |
| const fdt32_t *prop; |
| |
| naddr = fdt_address_cells(fdt, node); |
| |
| prop = fdt_getprop(fdt, node, "ranges", &size); |
| |
| return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; |
| } |
| |
| /* |
| * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. |
| */ |
| static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, |
| uint64_t *val, int cells) |
| { |
| const fdt32_t *prop32 = &prop[cell_off]; |
| const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; |
| |
| if ((cell_off + cells) > prop_len) |
| return -FDT_ERR_NOSPACE; |
| |
| switch (cells) { |
| case 1: |
| *val = fdt32_to_cpu(*prop32); |
| break; |
| case 2: |
| *val = fdt64_to_cpu(*prop64); |
| break; |
| default: |
| return -FDT_ERR_NOSPACE; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * fdt_read_range - Read a node's n'th range property |
| * |
| * @fdt: ptr to device tree |
| * @node: offset of node |
| * @n: range index |
| * @child_addr: pointer to storage for the "child address" field |
| * @addr: pointer to storage for the CPU view translated physical start |
| * @len: pointer to storage for the range length |
| * |
| * Convenience function that reads and interprets a specific range out of |
| * a number of the "ranges" property array. |
| */ |
| int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, |
| uint64_t *addr, uint64_t *len) |
| { |
| int pnode = fdt_parent_offset(fdt, node); |
| const fdt32_t *ranges; |
| int pacells; |
| int acells; |
| int scells; |
| int ranges_len; |
| int cell = 0; |
| int r = 0; |
| |
| /* |
| * The "ranges" property is an array of |
| * { <child address> <parent address> <size in child address space> } |
| * |
| * All 3 elements can span a diffent number of cells. Fetch their size. |
| */ |
| pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); |
| acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); |
| scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); |
| |
| /* Now try to get the ranges property */ |
| ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); |
| if (!ranges) |
| return -FDT_ERR_NOTFOUND; |
| ranges_len /= sizeof(uint32_t); |
| |
| /* Jump to the n'th entry */ |
| cell = n * (pacells + acells + scells); |
| |
| /* Read <child address> */ |
| if (child_addr) { |
| r = fdt_read_prop(ranges, ranges_len, cell, child_addr, |
| acells); |
| if (r) |
| return r; |
| } |
| cell += acells; |
| |
| /* Read <parent address> */ |
| if (addr) |
| *addr = fdt_translate_address(fdt, node, ranges + cell); |
| cell += pacells; |
| |
| /* Read <size in child address space> */ |
| if (len) { |
| r = fdt_read_prop(ranges, ranges_len, cell, len, scells); |
| if (r) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * fdt_setup_simplefb_node - Fill and enable a simplefb node |
| * |
| * @fdt: ptr to device tree |
| * @node: offset of the simplefb node |
| * @base_address: framebuffer base address |
| * @width: width in pixels |
| * @height: height in pixels |
| * @stride: bytes per line |
| * @format: pixel format string |
| * |
| * Convenience function to fill and enable a simplefb node. |
| */ |
| int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, |
| u32 height, u32 stride, const char *format) |
| { |
| char name[32]; |
| fdt32_t cells[4]; |
| int i, addrc, sizec, ret; |
| |
| of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node), |
| &addrc, &sizec); |
| i = 0; |
| if (addrc == 2) |
| cells[i++] = cpu_to_fdt32(base_address >> 32); |
| cells[i++] = cpu_to_fdt32(base_address); |
| if (sizec == 2) |
| cells[i++] = 0; |
| cells[i++] = cpu_to_fdt32(height * stride); |
| |
| ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); |
| if (ret < 0) |
| return ret; |
| |
| snprintf(name, sizeof(name), "framebuffer@%llx", base_address); |
| ret = fdt_set_name(fdt, node, name); |
| if (ret < 0) |
| return ret; |
| |
| ret = fdt_setprop_u32(fdt, node, "width", width); |
| if (ret < 0) |
| return ret; |
| |
| ret = fdt_setprop_u32(fdt, node, "height", height); |
| if (ret < 0) |
| return ret; |
| |
| ret = fdt_setprop_u32(fdt, node, "stride", stride); |
| if (ret < 0) |
| return ret; |
| |
| ret = fdt_setprop_string(fdt, node, "format", format); |
| if (ret < 0) |
| return ret; |
| |
| ret = fdt_setprop_string(fdt, node, "status", "okay"); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |