1 /* 2 * (C) Copyright 2012-2016 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 #include <dm/platform_data/serial_bcm283x_mu.h> 22 23 DECLARE_GLOBAL_DATA_PTR; 24 25 static const struct bcm2835_gpio_platdata gpio_platdata = { 26 .base = BCM2835_GPIO_BASE, 27 }; 28 29 U_BOOT_DEVICE(bcm2835_gpios) = { 30 .name = "gpio_bcm2835", 31 .platdata = &gpio_platdata, 32 }; 33 34 #ifdef CONFIG_PL01X_SERIAL 35 static const struct pl01x_serial_platdata serial_platdata = { 36 #ifndef CONFIG_BCM2835 37 .base = 0x3f201000, 38 #else 39 .base = 0x20201000, 40 #endif 41 .type = TYPE_PL011, 42 .skip_init = true, 43 }; 44 45 U_BOOT_DEVICE(bcm2835_serials) = { 46 .name = "serial_pl01x", 47 .platdata = &serial_platdata, 48 }; 49 #else 50 static const struct bcm283x_mu_serial_platdata serial_platdata = { 51 .base = 0x3f215040, 52 .clock = 250000000, 53 .skip_init = true, 54 }; 55 56 U_BOOT_DEVICE(bcm2837_serials) = { 57 .name = "serial_bcm283x_mu", 58 .platdata = &serial_platdata, 59 }; 60 #endif 61 62 struct msg_get_arm_mem { 63 struct bcm2835_mbox_hdr hdr; 64 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 65 u32 end_tag; 66 }; 67 68 struct msg_get_board_rev { 69 struct bcm2835_mbox_hdr hdr; 70 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 71 u32 end_tag; 72 }; 73 74 struct msg_get_board_serial { 75 struct bcm2835_mbox_hdr hdr; 76 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 77 u32 end_tag; 78 }; 79 80 struct msg_get_mac_address { 81 struct bcm2835_mbox_hdr hdr; 82 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 83 u32 end_tag; 84 }; 85 86 struct msg_set_power_state { 87 struct bcm2835_mbox_hdr hdr; 88 struct bcm2835_mbox_tag_set_power_state set_power_state; 89 u32 end_tag; 90 }; 91 92 struct msg_get_clock_rate { 93 struct bcm2835_mbox_hdr hdr; 94 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 95 u32 end_tag; 96 }; 97 98 /* 99 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 100 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 101 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 102 * 103 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 104 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 105 * Foundation stated that the following source was accurate: 106 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 107 */ 108 struct rpi_model { 109 const char *name; 110 const char *fdtfile; 111 bool has_onboard_eth; 112 }; 113 114 static const struct rpi_model rpi_model_unknown = { 115 "Unknown model", 116 "bcm283x-rpi-other.dtb", 117 false, 118 }; 119 120 static const struct rpi_model rpi_models_new_scheme[] = { 121 [0x4] = { 122 "2 Model B", 123 "bcm2836-rpi-2-b.dtb", 124 true, 125 }, 126 [0x8] = { 127 "3 Model B", 128 "bcm2837-rpi-3-b.dtb", 129 true, 130 }, 131 [0x9] = { 132 "Zero", 133 "bcm2835-rpi-zero.dtb", 134 false, 135 }, 136 }; 137 138 static const struct rpi_model rpi_models_old_scheme[] = { 139 [0x2] = { 140 "Model B", 141 "bcm2835-rpi-b.dtb", 142 true, 143 }, 144 [0x3] = { 145 "Model B", 146 "bcm2835-rpi-b.dtb", 147 true, 148 }, 149 [0x4] = { 150 "Model B rev2", 151 "bcm2835-rpi-b-rev2.dtb", 152 true, 153 }, 154 [0x5] = { 155 "Model B rev2", 156 "bcm2835-rpi-b-rev2.dtb", 157 true, 158 }, 159 [0x6] = { 160 "Model B rev2", 161 "bcm2835-rpi-b-rev2.dtb", 162 true, 163 }, 164 [0x7] = { 165 "Model A", 166 "bcm2835-rpi-a.dtb", 167 false, 168 }, 169 [0x8] = { 170 "Model A", 171 "bcm2835-rpi-a.dtb", 172 false, 173 }, 174 [0x9] = { 175 "Model A", 176 "bcm2835-rpi-a.dtb", 177 false, 178 }, 179 [0xd] = { 180 "Model B rev2", 181 "bcm2835-rpi-b-rev2.dtb", 182 true, 183 }, 184 [0xe] = { 185 "Model B rev2", 186 "bcm2835-rpi-b-rev2.dtb", 187 true, 188 }, 189 [0xf] = { 190 "Model B rev2", 191 "bcm2835-rpi-b-rev2.dtb", 192 true, 193 }, 194 [0x10] = { 195 "Model B+", 196 "bcm2835-rpi-b-plus.dtb", 197 true, 198 }, 199 [0x11] = { 200 "Compute Module", 201 "bcm2835-rpi-cm.dtb", 202 false, 203 }, 204 [0x12] = { 205 "Model A+", 206 "bcm2835-rpi-a-plus.dtb", 207 false, 208 }, 209 [0x13] = { 210 "Model B+", 211 "bcm2835-rpi-b-plus.dtb", 212 true, 213 }, 214 [0x14] = { 215 "Compute Module", 216 "bcm2835-rpi-cm.dtb", 217 false, 218 }, 219 [0x15] = { 220 "Model A+", 221 "bcm2835-rpi-a-plus.dtb", 222 false, 223 }, 224 }; 225 226 static uint32_t revision; 227 static uint32_t rev_scheme; 228 static uint32_t rev_type; 229 static const struct rpi_model *model; 230 231 int dram_init(void) 232 { 233 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 234 int ret; 235 236 BCM2835_MBOX_INIT_HDR(msg); 237 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 238 239 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 240 if (ret) { 241 printf("bcm2835: Could not query ARM memory size\n"); 242 return -1; 243 } 244 245 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 246 247 return 0; 248 } 249 250 static void set_fdtfile(void) 251 { 252 const char *fdtfile; 253 254 if (getenv("fdtfile")) 255 return; 256 257 fdtfile = model->fdtfile; 258 setenv("fdtfile", fdtfile); 259 } 260 261 static void set_usbethaddr(void) 262 { 263 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 264 int ret; 265 266 if (!model->has_onboard_eth) 267 return; 268 269 if (getenv("usbethaddr")) 270 return; 271 272 BCM2835_MBOX_INIT_HDR(msg); 273 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 274 275 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 276 if (ret) { 277 printf("bcm2835: Could not query MAC address\n"); 278 /* Ignore error; not critical */ 279 return; 280 } 281 282 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 283 284 if (!getenv("ethaddr")) 285 setenv("ethaddr", getenv("usbethaddr")); 286 287 return; 288 } 289 290 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 291 static void set_board_info(void) 292 { 293 char s[11]; 294 295 snprintf(s, sizeof(s), "0x%X", revision); 296 setenv("board_revision", s); 297 snprintf(s, sizeof(s), "%d", rev_scheme); 298 setenv("board_rev_scheme", s); 299 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 300 snprintf(s, sizeof(s), "0x%X", rev_type); 301 setenv("board_rev", s); 302 setenv("board_name", model->name); 303 } 304 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 305 306 static void set_serial_number(void) 307 { 308 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 309 int ret; 310 char serial_string[17] = { 0 }; 311 312 if (getenv("serial#")) 313 return; 314 315 BCM2835_MBOX_INIT_HDR(msg); 316 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 317 318 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 319 if (ret) { 320 printf("bcm2835: Could not query board serial\n"); 321 /* Ignore error; not critical */ 322 return; 323 } 324 325 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 326 msg->get_board_serial.body.resp.serial); 327 setenv("serial#", serial_string); 328 } 329 330 int misc_init_r(void) 331 { 332 set_fdtfile(); 333 set_usbethaddr(); 334 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 335 set_board_info(); 336 #endif 337 set_serial_number(); 338 339 return 0; 340 } 341 342 static int power_on_module(u32 module) 343 { 344 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 345 int ret; 346 347 BCM2835_MBOX_INIT_HDR(msg_pwr); 348 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 349 SET_POWER_STATE); 350 msg_pwr->set_power_state.body.req.device_id = module; 351 msg_pwr->set_power_state.body.req.state = 352 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 353 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 354 355 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 356 &msg_pwr->hdr); 357 if (ret) { 358 printf("bcm2835: Could not set module %u power state\n", 359 module); 360 return -1; 361 } 362 363 return 0; 364 } 365 366 static void get_board_rev(void) 367 { 368 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 369 int ret; 370 const struct rpi_model *models; 371 uint32_t models_count; 372 373 BCM2835_MBOX_INIT_HDR(msg); 374 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 375 376 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 377 if (ret) { 378 printf("bcm2835: Could not query board revision\n"); 379 /* Ignore error; not critical */ 380 return; 381 } 382 383 /* 384 * For details of old-vs-new scheme, see: 385 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 386 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 387 * (a few posts down) 388 * 389 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 390 * lower byte to use as the board rev: 391 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 392 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 393 */ 394 revision = msg->get_board_rev.body.resp.rev; 395 if (revision & 0x800000) { 396 rev_scheme = 1; 397 rev_type = (revision >> 4) & 0xff; 398 models = rpi_models_new_scheme; 399 models_count = ARRAY_SIZE(rpi_models_new_scheme); 400 } else { 401 rev_scheme = 0; 402 rev_type = revision & 0xff; 403 models = rpi_models_old_scheme; 404 models_count = ARRAY_SIZE(rpi_models_old_scheme); 405 } 406 if (rev_type >= models_count) { 407 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 408 model = &rpi_model_unknown; 409 } else if (!models[rev_type].name) { 410 printf("RPI: Board rev 0x%x unknown\n", rev_type); 411 model = &rpi_model_unknown; 412 } else { 413 model = &models[rev_type]; 414 } 415 416 printf("RPI %s (0x%x)\n", model->name, revision); 417 } 418 419 int board_init(void) 420 { 421 get_board_rev(); 422 423 gd->bd->bi_boot_params = 0x100; 424 425 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 426 } 427 428 int board_mmc_init(bd_t *bis) 429 { 430 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 431 int ret; 432 433 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 434 435 BCM2835_MBOX_INIT_HDR(msg_clk); 436 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 437 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 438 439 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 440 if (ret) { 441 printf("bcm2835: Could not query eMMC clock rate\n"); 442 return -1; 443 } 444 445 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 446 msg_clk->get_clock_rate.body.resp.rate_hz); 447 } 448 449 int ft_board_setup(void *blob, bd_t *bd) 450 { 451 /* 452 * For now, we simply always add the simplefb DT node. Later, we 453 * should be more intelligent, and e.g. only do this if no enabled DT 454 * node exists for the "real" graphics driver. 455 */ 456 lcd_dt_simplefb_add_node(blob); 457 458 return 0; 459 } 460