1 /* 2 * (C) Copyright 2012-2013,2015 Stephen Warren 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 #include <inttypes.h> 9 #include <config.h> 10 #include <dm.h> 11 #include <fdt_support.h> 12 #include <fdt_simplefb.h> 13 #include <lcd.h> 14 #include <memalign.h> 15 #include <mmc.h> 16 #include <asm/gpio.h> 17 #include <asm/arch/mbox.h> 18 #include <asm/arch/sdhci.h> 19 #include <asm/global_data.h> 20 #include <dm/platform_data/serial_pl01x.h> 21 22 DECLARE_GLOBAL_DATA_PTR; 23 24 static const struct bcm2835_gpio_platdata gpio_platdata = { 25 .base = BCM2835_GPIO_BASE, 26 }; 27 28 U_BOOT_DEVICE(bcm2835_gpios) = { 29 .name = "gpio_bcm2835", 30 .platdata = &gpio_platdata, 31 }; 32 33 static const struct pl01x_serial_platdata serial_platdata = { 34 #ifndef CONFIG_BCM2835 35 .base = 0x3f201000, 36 #else 37 .base = 0x20201000, 38 #endif 39 .type = TYPE_PL011, 40 .skip_init = true, 41 }; 42 43 U_BOOT_DEVICE(bcm2835_serials) = { 44 .name = "serial_pl01x", 45 .platdata = &serial_platdata, 46 }; 47 48 struct msg_get_arm_mem { 49 struct bcm2835_mbox_hdr hdr; 50 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 51 u32 end_tag; 52 }; 53 54 struct msg_get_board_rev { 55 struct bcm2835_mbox_hdr hdr; 56 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 57 u32 end_tag; 58 }; 59 60 struct msg_get_board_serial { 61 struct bcm2835_mbox_hdr hdr; 62 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 63 u32 end_tag; 64 }; 65 66 struct msg_get_mac_address { 67 struct bcm2835_mbox_hdr hdr; 68 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 69 u32 end_tag; 70 }; 71 72 struct msg_set_power_state { 73 struct bcm2835_mbox_hdr hdr; 74 struct bcm2835_mbox_tag_set_power_state set_power_state; 75 u32 end_tag; 76 }; 77 78 struct msg_get_clock_rate { 79 struct bcm2835_mbox_hdr hdr; 80 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 81 u32 end_tag; 82 }; 83 84 /* 85 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 86 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 87 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 88 * 89 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 90 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 91 * Foundation stated that the following source was accurate: 92 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 93 */ 94 struct rpi_model { 95 const char *name; 96 const char *fdtfile; 97 bool has_onboard_eth; 98 }; 99 100 static const struct rpi_model rpi_model_unknown = { 101 "Unknown model", 102 "bcm283x-rpi-other.dtb", 103 false, 104 }; 105 106 static const struct rpi_model rpi_models_new_scheme[] = { 107 [0x4] = { 108 "2 Model B", 109 "bcm2836-rpi-2-b.dtb", 110 true, 111 }, 112 [0x8] = { 113 "3 Model B", 114 "bcm2837-rpi-3-b.dtb", 115 true, 116 }, 117 [0x9] = { 118 "Zero", 119 "bcm2835-rpi-zero.dtb", 120 false, 121 }, 122 }; 123 124 static const struct rpi_model rpi_models_old_scheme[] = { 125 [0x2] = { 126 "Model B", 127 "bcm2835-rpi-b.dtb", 128 true, 129 }, 130 [0x3] = { 131 "Model B", 132 "bcm2835-rpi-b.dtb", 133 true, 134 }, 135 [0x4] = { 136 "Model B rev2", 137 "bcm2835-rpi-b-rev2.dtb", 138 true, 139 }, 140 [0x5] = { 141 "Model B rev2", 142 "bcm2835-rpi-b-rev2.dtb", 143 true, 144 }, 145 [0x6] = { 146 "Model B rev2", 147 "bcm2835-rpi-b-rev2.dtb", 148 true, 149 }, 150 [0x7] = { 151 "Model A", 152 "bcm2835-rpi-a.dtb", 153 false, 154 }, 155 [0x8] = { 156 "Model A", 157 "bcm2835-rpi-a.dtb", 158 false, 159 }, 160 [0x9] = { 161 "Model A", 162 "bcm2835-rpi-a.dtb", 163 false, 164 }, 165 [0xd] = { 166 "Model B rev2", 167 "bcm2835-rpi-b-rev2.dtb", 168 true, 169 }, 170 [0xe] = { 171 "Model B rev2", 172 "bcm2835-rpi-b-rev2.dtb", 173 true, 174 }, 175 [0xf] = { 176 "Model B rev2", 177 "bcm2835-rpi-b-rev2.dtb", 178 true, 179 }, 180 [0x10] = { 181 "Model B+", 182 "bcm2835-rpi-b-plus.dtb", 183 true, 184 }, 185 [0x11] = { 186 "Compute Module", 187 "bcm2835-rpi-cm.dtb", 188 false, 189 }, 190 [0x12] = { 191 "Model A+", 192 "bcm2835-rpi-a-plus.dtb", 193 false, 194 }, 195 [0x13] = { 196 "Model B+", 197 "bcm2835-rpi-b-plus.dtb", 198 true, 199 }, 200 [0x14] = { 201 "Compute Module", 202 "bcm2835-rpi-cm.dtb", 203 false, 204 }, 205 [0x15] = { 206 "Model A+", 207 "bcm2835-rpi-a-plus.dtb", 208 false, 209 }, 210 }; 211 212 static uint32_t revision; 213 static uint32_t rev_scheme; 214 static uint32_t rev_type; 215 static const struct rpi_model *model; 216 217 int dram_init(void) 218 { 219 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 220 int ret; 221 222 BCM2835_MBOX_INIT_HDR(msg); 223 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 224 225 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 226 if (ret) { 227 printf("bcm2835: Could not query ARM memory size\n"); 228 return -1; 229 } 230 231 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 232 233 return 0; 234 } 235 236 static void set_fdtfile(void) 237 { 238 const char *fdtfile; 239 240 if (getenv("fdtfile")) 241 return; 242 243 fdtfile = model->fdtfile; 244 setenv("fdtfile", fdtfile); 245 } 246 247 static void set_usbethaddr(void) 248 { 249 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 250 int ret; 251 252 if (!model->has_onboard_eth) 253 return; 254 255 if (getenv("usbethaddr")) 256 return; 257 258 BCM2835_MBOX_INIT_HDR(msg); 259 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 260 261 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 262 if (ret) { 263 printf("bcm2835: Could not query MAC address\n"); 264 /* Ignore error; not critical */ 265 return; 266 } 267 268 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 269 270 if (!getenv("ethaddr")) 271 setenv("ethaddr", getenv("usbethaddr")); 272 273 return; 274 } 275 276 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 277 static void set_board_info(void) 278 { 279 char s[11]; 280 281 snprintf(s, sizeof(s), "0x%X", revision); 282 setenv("board_revision", s); 283 snprintf(s, sizeof(s), "%d", rev_scheme); 284 setenv("board_rev_scheme", s); 285 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 286 snprintf(s, sizeof(s), "0x%X", rev_type); 287 setenv("board_rev", s); 288 setenv("board_name", model->name); 289 } 290 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 291 292 static void set_serial_number(void) 293 { 294 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 295 int ret; 296 char serial_string[17] = { 0 }; 297 298 if (getenv("serial#")) 299 return; 300 301 BCM2835_MBOX_INIT_HDR(msg); 302 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 303 304 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 305 if (ret) { 306 printf("bcm2835: Could not query board serial\n"); 307 /* Ignore error; not critical */ 308 return; 309 } 310 311 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 312 msg->get_board_serial.body.resp.serial); 313 setenv("serial#", serial_string); 314 } 315 316 int misc_init_r(void) 317 { 318 set_fdtfile(); 319 set_usbethaddr(); 320 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 321 set_board_info(); 322 #endif 323 set_serial_number(); 324 325 return 0; 326 } 327 328 static int power_on_module(u32 module) 329 { 330 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 331 int ret; 332 333 BCM2835_MBOX_INIT_HDR(msg_pwr); 334 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 335 SET_POWER_STATE); 336 msg_pwr->set_power_state.body.req.device_id = module; 337 msg_pwr->set_power_state.body.req.state = 338 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 339 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 340 341 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 342 &msg_pwr->hdr); 343 if (ret) { 344 printf("bcm2835: Could not set module %u power state\n", 345 module); 346 return -1; 347 } 348 349 return 0; 350 } 351 352 static void get_board_rev(void) 353 { 354 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 355 int ret; 356 const struct rpi_model *models; 357 uint32_t models_count; 358 359 BCM2835_MBOX_INIT_HDR(msg); 360 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 361 362 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 363 if (ret) { 364 printf("bcm2835: Could not query board revision\n"); 365 /* Ignore error; not critical */ 366 return; 367 } 368 369 /* 370 * For details of old-vs-new scheme, see: 371 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 372 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 373 * (a few posts down) 374 * 375 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 376 * lower byte to use as the board rev: 377 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 378 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 379 */ 380 revision = msg->get_board_rev.body.resp.rev; 381 if (revision & 0x800000) { 382 rev_scheme = 1; 383 rev_type = (revision >> 4) & 0xff; 384 models = rpi_models_new_scheme; 385 models_count = ARRAY_SIZE(rpi_models_new_scheme); 386 } else { 387 rev_scheme = 0; 388 rev_type = revision & 0xff; 389 models = rpi_models_old_scheme; 390 models_count = ARRAY_SIZE(rpi_models_old_scheme); 391 } 392 if (rev_type >= models_count) { 393 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 394 model = &rpi_model_unknown; 395 } else if (!models[rev_type].name) { 396 printf("RPI: Board rev 0x%x unknown\n", rev_type); 397 model = &rpi_model_unknown; 398 } else { 399 model = &models[rev_type]; 400 } 401 402 printf("RPI %s (0x%x)\n", model->name, revision); 403 } 404 405 int board_init(void) 406 { 407 get_board_rev(); 408 409 gd->bd->bi_boot_params = 0x100; 410 411 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 412 } 413 414 int board_mmc_init(bd_t *bis) 415 { 416 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 417 int ret; 418 419 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 420 421 BCM2835_MBOX_INIT_HDR(msg_clk); 422 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 423 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 424 425 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 426 if (ret) { 427 printf("bcm2835: Could not query eMMC clock rate\n"); 428 return -1; 429 } 430 431 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 432 msg_clk->get_clock_rate.body.resp.rate_hz); 433 } 434 435 int ft_board_setup(void *blob, bd_t *bd) 436 { 437 /* 438 * For now, we simply always add the simplefb DT node. Later, we 439 * should be more intelligent, and e.g. only do this if no enabled DT 440 * node exists for the "real" graphics driver. 441 */ 442 lcd_dt_simplefb_add_node(blob); 443 444 return 0; 445 } 446