Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 1 | /* |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <assert.h> |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 8 | #include <errno.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 9 | |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 10 | #include <libfdt.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 11 | |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 12 | #include <platform_def.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 13 | |
| 14 | #include <common/debug.h> |
| 15 | #include <drivers/st/stm32_gpio.h> |
| 16 | #include <drivers/st/stm32mp1_clk.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 17 | #include <drivers/st/stm32mp1_ddr.h> |
| 18 | #include <drivers/st/stm32mp1_ram.h> |
| 19 | |
Yann Gautier | ee8f542 | 2019-02-14 11:13:25 +0100 | [diff] [blame] | 20 | #include <stm32mp_dt.h> |
| 21 | |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 22 | static int fdt_checked; |
| 23 | |
Yann Gautier | a2e2a30 | 2019-02-14 11:13:39 +0100 | [diff] [blame^] | 24 | static void *fdt = (void *)(uintptr_t)STM32MP_DTB_BASE; |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 25 | |
| 26 | /******************************************************************************* |
| 27 | * This function checks device tree file with its header. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 28 | * Returns 0 on success and a negative FDT error code on failure. |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 29 | ******************************************************************************/ |
| 30 | int dt_open_and_check(void) |
| 31 | { |
| 32 | int ret = fdt_check_header(fdt); |
| 33 | |
| 34 | if (ret == 0) { |
| 35 | fdt_checked = 1; |
| 36 | } |
| 37 | |
| 38 | return ret; |
| 39 | } |
| 40 | |
| 41 | /******************************************************************************* |
| 42 | * This function gets the address of the DT. |
| 43 | * If DT is OK, fdt_addr is filled with DT address. |
| 44 | * Returns 1 if success, 0 otherwise. |
| 45 | ******************************************************************************/ |
| 46 | int fdt_get_address(void **fdt_addr) |
| 47 | { |
| 48 | if (fdt_checked == 1) { |
| 49 | *fdt_addr = fdt; |
| 50 | } |
| 51 | |
| 52 | return fdt_checked; |
| 53 | } |
| 54 | |
| 55 | /******************************************************************************* |
| 56 | * This function check the presence of a node (generic use of fdt library). |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 57 | * Returns true if present, else return false. |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 58 | ******************************************************************************/ |
| 59 | bool fdt_check_node(int node) |
| 60 | { |
| 61 | int len; |
| 62 | const char *cchar; |
| 63 | |
| 64 | cchar = fdt_get_name(fdt, node, &len); |
| 65 | |
| 66 | return (cchar != NULL) && (len >= 0); |
| 67 | } |
| 68 | |
| 69 | /******************************************************************************* |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 70 | * This function return global node status (generic use of fdt library). |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 71 | ******************************************************************************/ |
Yann Gautier | ee8f542 | 2019-02-14 11:13:25 +0100 | [diff] [blame] | 72 | uint8_t fdt_get_status(int node) |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 73 | { |
Yann Gautier | ee8f542 | 2019-02-14 11:13:25 +0100 | [diff] [blame] | 74 | uint8_t status = DT_DISABLED; |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 75 | int len; |
| 76 | const char *cchar; |
| 77 | |
| 78 | cchar = fdt_getprop(fdt, node, "status", &len); |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 79 | if ((cchar == NULL) || |
| 80 | (strncmp(cchar, "okay", (size_t)len) == 0)) { |
| 81 | status |= DT_NON_SECURE; |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 82 | } |
| 83 | |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 84 | cchar = fdt_getprop(fdt, node, "secure-status", &len); |
| 85 | if (cchar == NULL) { |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 86 | if (status == DT_NON_SECURE) { |
| 87 | status |= DT_SECURE; |
| 88 | } |
| 89 | } else if (strncmp(cchar, "okay", (size_t)len) == 0) { |
| 90 | status |= DT_SECURE; |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 91 | } |
| 92 | |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 93 | return status; |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /******************************************************************************* |
| 97 | * This function reads a value of a node property (generic use of fdt |
| 98 | * library). |
| 99 | * Returns value if success, and a default value if property not found. |
| 100 | * Default value is passed as parameter. |
| 101 | ******************************************************************************/ |
| 102 | uint32_t fdt_read_uint32_default(int node, const char *prop_name, |
| 103 | uint32_t dflt_value) |
| 104 | { |
| 105 | const fdt32_t *cuint; |
| 106 | int lenp; |
| 107 | |
| 108 | cuint = fdt_getprop(fdt, node, prop_name, &lenp); |
| 109 | if (cuint == NULL) { |
| 110 | return dflt_value; |
| 111 | } |
| 112 | |
| 113 | return fdt32_to_cpu(*cuint); |
| 114 | } |
| 115 | |
| 116 | /******************************************************************************* |
| 117 | * This function reads a series of parameters in a node property |
| 118 | * (generic use of fdt library). |
| 119 | * It reads the values inside the device tree, from property name and node. |
| 120 | * The number of parameters is also indicated as entry parameter. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 121 | * Returns 0 on success and a negative FDT error code on failure. |
Yann Gautier | 9aea69e | 2018-07-24 17:13:36 +0200 | [diff] [blame] | 122 | * If success, values are stored at the third parameter address. |
| 123 | ******************************************************************************/ |
| 124 | int fdt_read_uint32_array(int node, const char *prop_name, uint32_t *array, |
| 125 | uint32_t count) |
| 126 | { |
| 127 | const fdt32_t *cuint; |
| 128 | int len; |
| 129 | uint32_t i; |
| 130 | |
| 131 | cuint = fdt_getprop(fdt, node, prop_name, &len); |
| 132 | if (cuint == NULL) { |
| 133 | return -FDT_ERR_NOTFOUND; |
| 134 | } |
| 135 | |
| 136 | if ((uint32_t)len != (count * sizeof(uint32_t))) { |
| 137 | return -FDT_ERR_BADLAYOUT; |
| 138 | } |
| 139 | |
| 140 | for (i = 0; i < ((uint32_t)len / sizeof(uint32_t)); i++) { |
| 141 | *array = fdt32_to_cpu(*cuint); |
| 142 | array++; |
| 143 | cuint++; |
| 144 | } |
| 145 | |
| 146 | return 0; |
| 147 | } |
Yann Gautier | d0ca7f4 | 2018-07-13 21:33:09 +0200 | [diff] [blame] | 148 | |
| 149 | /******************************************************************************* |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 150 | * This function gets the stdout pin configuration information from the DT. |
| 151 | * And then calls the sub-function to treat it and set GPIO registers. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 152 | * Returns 0 on success and a negative FDT error code on failure. |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 153 | ******************************************************************************/ |
| 154 | int dt_set_stdout_pinctrl(void) |
| 155 | { |
| 156 | int node; |
| 157 | |
| 158 | node = dt_get_stdout_node_offset(); |
| 159 | if (node < 0) { |
| 160 | return -FDT_ERR_NOTFOUND; |
| 161 | } |
| 162 | |
| 163 | return dt_set_pinctrl_config(node); |
| 164 | } |
| 165 | |
| 166 | /******************************************************************************* |
| 167 | * This function fills the generic information from a given node. |
| 168 | ******************************************************************************/ |
| 169 | void dt_fill_device_info(struct dt_node_info *info, int node) |
| 170 | { |
| 171 | const fdt32_t *cuint; |
| 172 | |
| 173 | cuint = fdt_getprop(fdt, node, "reg", NULL); |
| 174 | if (cuint != NULL) { |
| 175 | info->base = fdt32_to_cpu(*cuint); |
| 176 | } else { |
| 177 | info->base = 0; |
| 178 | } |
| 179 | |
| 180 | cuint = fdt_getprop(fdt, node, "clocks", NULL); |
| 181 | if (cuint != NULL) { |
| 182 | cuint++; |
| 183 | info->clock = (int)fdt32_to_cpu(*cuint); |
| 184 | } else { |
| 185 | info->clock = -1; |
| 186 | } |
| 187 | |
| 188 | cuint = fdt_getprop(fdt, node, "resets", NULL); |
| 189 | if (cuint != NULL) { |
| 190 | cuint++; |
| 191 | info->reset = (int)fdt32_to_cpu(*cuint); |
| 192 | } else { |
| 193 | info->reset = -1; |
| 194 | } |
| 195 | |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 196 | info->status = fdt_get_status(node); |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | /******************************************************************************* |
| 200 | * This function retrieve the generic information from DT. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 201 | * Returns node on success and a negative FDT error code on failure. |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 202 | ******************************************************************************/ |
| 203 | int dt_get_node(struct dt_node_info *info, int offset, const char *compat) |
| 204 | { |
| 205 | int node; |
| 206 | |
| 207 | node = fdt_node_offset_by_compatible(fdt, offset, compat); |
| 208 | if (node < 0) { |
| 209 | return -FDT_ERR_NOTFOUND; |
| 210 | } |
| 211 | |
| 212 | dt_fill_device_info(info, node); |
| 213 | |
| 214 | return node; |
| 215 | } |
| 216 | |
| 217 | /******************************************************************************* |
| 218 | * This function gets the UART instance info of stdout from the DT. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 219 | * Returns node on success and a negative FDT error code on failure. |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 220 | ******************************************************************************/ |
| 221 | int dt_get_stdout_uart_info(struct dt_node_info *info) |
| 222 | { |
| 223 | int node; |
| 224 | |
| 225 | node = dt_get_stdout_node_offset(); |
| 226 | if (node < 0) { |
| 227 | return -FDT_ERR_NOTFOUND; |
| 228 | } |
| 229 | |
| 230 | dt_fill_device_info(info, node); |
| 231 | |
| 232 | return node; |
| 233 | } |
| 234 | |
| 235 | /******************************************************************************* |
| 236 | * This function gets the stdout path node. |
| 237 | * It reads the value indicated inside the device tree. |
| 238 | * Returns node if success, and a negative value else. |
| 239 | ******************************************************************************/ |
| 240 | int dt_get_stdout_node_offset(void) |
| 241 | { |
| 242 | int node; |
| 243 | const char *cchar; |
| 244 | |
| 245 | node = fdt_path_offset(fdt, "/chosen"); |
| 246 | if (node < 0) { |
| 247 | return -FDT_ERR_NOTFOUND; |
| 248 | } |
| 249 | |
| 250 | cchar = fdt_getprop(fdt, node, "stdout-path", NULL); |
| 251 | if (cchar == NULL) { |
| 252 | return -FDT_ERR_NOTFOUND; |
| 253 | } |
| 254 | |
| 255 | node = -FDT_ERR_NOTFOUND; |
| 256 | if (strchr(cchar, (int)':') != NULL) { |
| 257 | const char *name; |
| 258 | char *str = (char *)cchar; |
| 259 | int len = 0; |
| 260 | |
| 261 | while (strncmp(":", str, 1)) { |
| 262 | len++; |
| 263 | str++; |
| 264 | } |
| 265 | |
| 266 | name = fdt_get_alias_namelen(fdt, cchar, len); |
| 267 | |
| 268 | if (name != NULL) { |
| 269 | node = fdt_path_offset(fdt, name); |
| 270 | } |
| 271 | } else { |
| 272 | node = fdt_path_offset(fdt, cchar); |
| 273 | } |
| 274 | |
| 275 | return node; |
| 276 | } |
| 277 | |
| 278 | /******************************************************************************* |
Yann Gautier | caf575b | 2018-07-24 17:18:19 +0200 | [diff] [blame] | 279 | * This function gets DDR size information from the DT. |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 280 | * Returns value in bytes on success, and 0 on failure. |
Yann Gautier | caf575b | 2018-07-24 17:18:19 +0200 | [diff] [blame] | 281 | ******************************************************************************/ |
| 282 | uint32_t dt_get_ddr_size(void) |
| 283 | { |
| 284 | int node; |
| 285 | |
| 286 | node = fdt_node_offset_by_compatible(fdt, -1, DT_DDR_COMPAT); |
| 287 | if (node < 0) { |
| 288 | INFO("%s: Cannot read DDR node in DT\n", __func__); |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 289 | return 0; |
Yann Gautier | caf575b | 2018-07-24 17:18:19 +0200 | [diff] [blame] | 290 | } |
| 291 | |
Yann Gautier | 038bff2 | 2019-01-17 19:17:47 +0100 | [diff] [blame] | 292 | return fdt_read_uint32_default(node, "st,mem-size", 0); |
Yann Gautier | caf575b | 2018-07-24 17:18:19 +0200 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | /******************************************************************************* |
Yann Gautier | 69035a8 | 2018-07-05 16:48:16 +0200 | [diff] [blame] | 296 | * This function retrieves board model from DT |
| 297 | * Returns string taken from model node, NULL otherwise |
| 298 | ******************************************************************************/ |
| 299 | const char *dt_get_board_model(void) |
| 300 | { |
| 301 | int node = fdt_path_offset(fdt, "/"); |
| 302 | |
| 303 | if (node < 0) { |
| 304 | return NULL; |
| 305 | } |
| 306 | |
| 307 | return (const char *)fdt_getprop(fdt, node, "model", NULL); |
| 308 | } |