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 #ifdef CONFIG_BCM2836 35 .base = 0x3f201000, 36 #else 37 .base = 0x20201000, 38 #endif 39 .type = TYPE_PL011, 40 .clock = 3000000, 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 #ifdef CONFIG_BCM2836 103 "bcm2836-rpi-other.dtb", 104 #else 105 "bcm2835-rpi-other.dtb", 106 #endif 107 false, 108 }; 109 110 static const struct rpi_model rpi_models_new_scheme[] = { 111 [0x4] = { 112 "2 Model B", 113 "bcm2836-rpi-2-b.dtb", 114 true, 115 }, 116 [0x9] = { 117 "Zero", 118 "bcm2835-rpi-zero.dtb", 119 false, 120 }, 121 }; 122 123 static const struct rpi_model rpi_models_old_scheme[] = { 124 [0x2] = { 125 "Model B", 126 "bcm2835-rpi-b.dtb", 127 true, 128 }, 129 [0x3] = { 130 "Model B", 131 "bcm2835-rpi-b.dtb", 132 true, 133 }, 134 [0x4] = { 135 "Model B rev2", 136 "bcm2835-rpi-b-rev2.dtb", 137 true, 138 }, 139 [0x5] = { 140 "Model B rev2", 141 "bcm2835-rpi-b-rev2.dtb", 142 true, 143 }, 144 [0x6] = { 145 "Model B rev2", 146 "bcm2835-rpi-b-rev2.dtb", 147 true, 148 }, 149 [0x7] = { 150 "Model A", 151 "bcm2835-rpi-a.dtb", 152 false, 153 }, 154 [0x8] = { 155 "Model A", 156 "bcm2835-rpi-a.dtb", 157 false, 158 }, 159 [0x9] = { 160 "Model A", 161 "bcm2835-rpi-a.dtb", 162 false, 163 }, 164 [0xd] = { 165 "Model B rev2", 166 "bcm2835-rpi-b-rev2.dtb", 167 true, 168 }, 169 [0xe] = { 170 "Model B rev2", 171 "bcm2835-rpi-b-rev2.dtb", 172 true, 173 }, 174 [0xf] = { 175 "Model B rev2", 176 "bcm2835-rpi-b-rev2.dtb", 177 true, 178 }, 179 [0x10] = { 180 "Model B+", 181 "bcm2835-rpi-b-plus.dtb", 182 true, 183 }, 184 [0x11] = { 185 "Compute Module", 186 "bcm2835-rpi-cm.dtb", 187 false, 188 }, 189 [0x12] = { 190 "Model A+", 191 "bcm2835-rpi-a-plus.dtb", 192 false, 193 }, 194 [0x13] = { 195 "Model B+", 196 "bcm2835-rpi-b-plus.dtb", 197 true, 198 }, 199 [0x14] = { 200 "Compute Module", 201 "bcm2835-rpi-cm.dtb", 202 false, 203 }, 204 [0x15] = { 205 "Model A+", 206 "bcm2835-rpi-a-plus.dtb", 207 false, 208 }, 209 }; 210 211 static uint32_t revision; 212 static uint32_t rev_scheme; 213 static uint32_t rev_type; 214 static const struct rpi_model *model; 215 216 int dram_init(void) 217 { 218 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 219 int ret; 220 221 BCM2835_MBOX_INIT_HDR(msg); 222 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 223 224 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 225 if (ret) { 226 printf("bcm2835: Could not query ARM memory size\n"); 227 return -1; 228 } 229 230 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 231 232 return 0; 233 } 234 235 static void set_fdtfile(void) 236 { 237 const char *fdtfile; 238 239 if (getenv("fdtfile")) 240 return; 241 242 fdtfile = model->fdtfile; 243 setenv("fdtfile", fdtfile); 244 } 245 246 static void set_usbethaddr(void) 247 { 248 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 249 int ret; 250 251 if (!model->has_onboard_eth) 252 return; 253 254 if (getenv("usbethaddr")) 255 return; 256 257 BCM2835_MBOX_INIT_HDR(msg); 258 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 259 260 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 261 if (ret) { 262 printf("bcm2835: Could not query MAC address\n"); 263 /* Ignore error; not critical */ 264 return; 265 } 266 267 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 268 269 if (!getenv("ethaddr")) 270 setenv("ethaddr", getenv("usbethaddr")); 271 272 return; 273 } 274 275 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 276 static void set_board_info(void) 277 { 278 char s[11]; 279 280 snprintf(s, sizeof(s), "0x%X", revision); 281 setenv("board_revision", s); 282 snprintf(s, sizeof(s), "%d", rev_scheme); 283 setenv("board_rev_scheme", s); 284 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 285 snprintf(s, sizeof(s), "0x%X", rev_type); 286 setenv("board_rev", s); 287 setenv("board_name", model->name); 288 } 289 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 290 291 static void set_serial_number(void) 292 { 293 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 294 int ret; 295 char serial_string[17] = { 0 }; 296 297 if (getenv("serial#")) 298 return; 299 300 BCM2835_MBOX_INIT_HDR(msg); 301 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 302 303 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 304 if (ret) { 305 printf("bcm2835: Could not query board serial\n"); 306 /* Ignore error; not critical */ 307 return; 308 } 309 310 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 311 msg->get_board_serial.body.resp.serial); 312 setenv("serial#", serial_string); 313 } 314 315 int misc_init_r(void) 316 { 317 set_fdtfile(); 318 set_usbethaddr(); 319 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 320 set_board_info(); 321 #endif 322 set_serial_number(); 323 324 return 0; 325 } 326 327 static int power_on_module(u32 module) 328 { 329 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 330 int ret; 331 332 BCM2835_MBOX_INIT_HDR(msg_pwr); 333 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 334 SET_POWER_STATE); 335 msg_pwr->set_power_state.body.req.device_id = module; 336 msg_pwr->set_power_state.body.req.state = 337 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 338 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 339 340 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 341 &msg_pwr->hdr); 342 if (ret) { 343 printf("bcm2835: Could not set module %u power state\n", 344 module); 345 return -1; 346 } 347 348 return 0; 349 } 350 351 static void get_board_rev(void) 352 { 353 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 354 int ret; 355 const struct rpi_model *models; 356 uint32_t models_count; 357 358 BCM2835_MBOX_INIT_HDR(msg); 359 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 360 361 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 362 if (ret) { 363 printf("bcm2835: Could not query board revision\n"); 364 /* Ignore error; not critical */ 365 return; 366 } 367 368 /* 369 * For details of old-vs-new scheme, see: 370 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 371 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 372 * (a few posts down) 373 * 374 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 375 * lower byte to use as the board rev: 376 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 377 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 378 */ 379 revision = msg->get_board_rev.body.resp.rev; 380 if (revision & 0x800000) { 381 rev_scheme = 1; 382 rev_type = (revision >> 4) & 0xff; 383 models = rpi_models_new_scheme; 384 models_count = ARRAY_SIZE(rpi_models_new_scheme); 385 } else { 386 rev_scheme = 0; 387 rev_type = revision & 0xff; 388 models = rpi_models_old_scheme; 389 models_count = ARRAY_SIZE(rpi_models_old_scheme); 390 } 391 if (rev_type >= models_count) { 392 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 393 model = &rpi_model_unknown; 394 } else if (!models[rev_type].name) { 395 printf("RPI: Board rev 0x%x unknown\n", rev_type); 396 model = &rpi_model_unknown; 397 } else { 398 model = &models[rev_type]; 399 } 400 401 printf("RPI %s (0x%x)\n", model->name, revision); 402 } 403 404 int board_init(void) 405 { 406 get_board_rev(); 407 408 gd->bd->bi_boot_params = 0x100; 409 410 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 411 } 412 413 int board_mmc_init(bd_t *bis) 414 { 415 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 416 int ret; 417 418 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 419 420 BCM2835_MBOX_INIT_HDR(msg_clk); 421 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 422 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 423 424 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 425 if (ret) { 426 printf("bcm2835: Could not query eMMC clock rate\n"); 427 return -1; 428 } 429 430 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 431 msg_clk->get_clock_rate.body.resp.rate_hz); 432 } 433 434 int ft_board_setup(void *blob, bd_t *bd) 435 { 436 /* 437 * For now, we simply always add the simplefb DT node. Later, we 438 * should be more intelligent, and e.g. only do this if no enabled DT 439 * node exists for the "real" graphics driver. 440 */ 441 lcd_dt_simplefb_add_node(blob); 442 443 return 0; 444 } 445