Peng Fan | 9f779fa | 2019-08-26 08:11:56 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright 2019 NXP |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <asm/arch/sci/sci.h> |
| 8 | #include <dm/ofnode.h> |
| 9 | #include <fdt_support.h> |
| 10 | |
| 11 | DECLARE_GLOBAL_DATA_PTR; |
| 12 | |
| 13 | static bool check_owned_resource(sc_rsrc_t rsrc_id) |
| 14 | { |
| 15 | bool owned; |
| 16 | |
| 17 | owned = sc_rm_is_resource_owned(-1, rsrc_id); |
| 18 | |
| 19 | return owned; |
| 20 | } |
| 21 | |
| 22 | static int disable_fdt_node(void *blob, int nodeoffset) |
| 23 | { |
| 24 | int rc, ret; |
| 25 | const char *status = "disabled"; |
| 26 | |
| 27 | do { |
| 28 | rc = fdt_setprop(blob, nodeoffset, "status", status, |
| 29 | strlen(status) + 1); |
| 30 | if (rc) { |
| 31 | if (rc == -FDT_ERR_NOSPACE) { |
| 32 | ret = fdt_increase_size(blob, 512); |
| 33 | if (ret) |
| 34 | return ret; |
| 35 | } |
| 36 | } |
| 37 | } while (rc == -FDT_ERR_NOSPACE); |
| 38 | |
| 39 | return rc; |
| 40 | } |
| 41 | |
| 42 | static void update_fdt_with_owned_resources(void *blob) |
| 43 | { |
| 44 | /* |
| 45 | * Traverses the fdt nodes, check its power domain and use |
| 46 | * the resource id in the power domain for checking whether |
| 47 | * it is owned by current partition |
| 48 | */ |
| 49 | struct fdtdec_phandle_args args; |
| 50 | int offset = 0, depth = 0; |
| 51 | u32 rsrc_id; |
| 52 | int rc, i; |
| 53 | |
| 54 | for (offset = fdt_next_node(blob, offset, &depth); offset > 0; |
| 55 | offset = fdt_next_node(blob, offset, &depth)) { |
| 56 | debug("Node name: %s, depth %d\n", |
| 57 | fdt_get_name(blob, offset, NULL), depth); |
| 58 | |
| 59 | if (!fdt_get_property(blob, offset, "power-domains", NULL)) { |
| 60 | debug(" - ignoring node %s\n", |
| 61 | fdt_get_name(blob, offset, NULL)); |
| 62 | continue; |
| 63 | } |
| 64 | |
| 65 | if (!fdtdec_get_is_enabled(blob, offset)) { |
| 66 | debug(" - ignoring node %s\n", |
| 67 | fdt_get_name(blob, offset, NULL)); |
| 68 | continue; |
| 69 | } |
| 70 | |
| 71 | i = 0; |
| 72 | while (true) { |
| 73 | rc = fdtdec_parse_phandle_with_args(blob, offset, |
| 74 | "power-domains", |
| 75 | "#power-domain-cells", |
| 76 | 0, i++, &args); |
| 77 | if (rc == -ENOENT) { |
| 78 | break; |
| 79 | } else if (rc) { |
| 80 | printf("Parse power-domains of %s wrong: %d\n", |
| 81 | fdt_get_name(blob, offset, NULL), rc); |
| 82 | continue; |
| 83 | } |
| 84 | |
| 85 | rsrc_id = args.args[0]; |
| 86 | |
| 87 | if (!check_owned_resource(rsrc_id)) { |
| 88 | rc = disable_fdt_node(blob, offset); |
| 89 | if (!rc) { |
| 90 | printf("Disable %s rsrc %u not owned\n", |
| 91 | fdt_get_name(blob, offset, NULL), |
| 92 | rsrc_id); |
| 93 | } else { |
| 94 | printf("Unable to disable %s, err=%s\n", |
| 95 | fdt_get_name(blob, offset, NULL), |
| 96 | fdt_strerror(rc)); |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | int ft_system_setup(void *blob, bd_t *bd) |
| 104 | { |
| 105 | update_fdt_with_owned_resources(blob); |
| 106 | |
| 107 | return 0; |
| 108 | } |