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 <config.h> 9 #include <dm.h> 10 #include <fdt_support.h> 11 #include <fdt_simplefb.h> 12 #include <lcd.h> 13 #include <memalign.h> 14 #include <mmc.h> 15 #include <asm/gpio.h> 16 #include <asm/arch/mbox.h> 17 #include <asm/arch/sdhci.h> 18 #include <asm/global_data.h> 19 #include <dm/platform_data/serial_pl01x.h> 20 21 DECLARE_GLOBAL_DATA_PTR; 22 23 static const struct bcm2835_gpio_platdata gpio_platdata = { 24 .base = BCM2835_GPIO_BASE, 25 }; 26 27 U_BOOT_DEVICE(bcm2835_gpios) = { 28 .name = "gpio_bcm2835", 29 .platdata = &gpio_platdata, 30 }; 31 32 static const struct pl01x_serial_platdata serial_platdata = { 33 #ifdef CONFIG_BCM2836 34 .base = 0x3f201000, 35 #else 36 .base = 0x20201000, 37 #endif 38 .type = TYPE_PL011, 39 .clock = 3000000, 40 }; 41 42 U_BOOT_DEVICE(bcm2835_serials) = { 43 .name = "serial_pl01x", 44 .platdata = &serial_platdata, 45 }; 46 47 struct msg_get_arm_mem { 48 struct bcm2835_mbox_hdr hdr; 49 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 50 u32 end_tag; 51 }; 52 53 struct msg_get_board_rev { 54 struct bcm2835_mbox_hdr hdr; 55 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 56 u32 end_tag; 57 }; 58 59 struct msg_get_mac_address { 60 struct bcm2835_mbox_hdr hdr; 61 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 62 u32 end_tag; 63 }; 64 65 struct msg_set_power_state { 66 struct bcm2835_mbox_hdr hdr; 67 struct bcm2835_mbox_tag_set_power_state set_power_state; 68 u32 end_tag; 69 }; 70 71 struct msg_get_clock_rate { 72 struct bcm2835_mbox_hdr hdr; 73 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 74 u32 end_tag; 75 }; 76 77 /* 78 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 79 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 80 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 81 * 82 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 83 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 84 * Foundation stated that the following source was accurate: 85 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 86 */ 87 struct rpi_model { 88 const char *name; 89 const char *fdtfile; 90 bool has_onboard_eth; 91 }; 92 93 static const struct rpi_model rpi_model_unknown = { 94 "Unknown model", 95 #ifdef CONFIG_BCM2836 96 "bcm2836-rpi-other.dtb", 97 #else 98 "bcm2835-rpi-other.dtb", 99 #endif 100 false, 101 }; 102 103 static const struct rpi_model rpi_models_new_scheme[] = { 104 [0x4] = { 105 "2 Model B", 106 "bcm2836-rpi-2-b.dtb", 107 true, 108 }, 109 [0x9] = { 110 "Zero", 111 "bcm2835-rpi-zero.dtb", 112 false, 113 }, 114 }; 115 116 static const struct rpi_model rpi_models_old_scheme[] = { 117 [0x2] = { 118 "Model B", 119 "bcm2835-rpi-b.dtb", 120 true, 121 }, 122 [0x3] = { 123 "Model B", 124 "bcm2835-rpi-b.dtb", 125 true, 126 }, 127 [0x4] = { 128 "Model B rev2", 129 "bcm2835-rpi-b-rev2.dtb", 130 true, 131 }, 132 [0x5] = { 133 "Model B rev2", 134 "bcm2835-rpi-b-rev2.dtb", 135 true, 136 }, 137 [0x6] = { 138 "Model B rev2", 139 "bcm2835-rpi-b-rev2.dtb", 140 true, 141 }, 142 [0x7] = { 143 "Model A", 144 "bcm2835-rpi-a.dtb", 145 false, 146 }, 147 [0x8] = { 148 "Model A", 149 "bcm2835-rpi-a.dtb", 150 false, 151 }, 152 [0x9] = { 153 "Model A", 154 "bcm2835-rpi-a.dtb", 155 false, 156 }, 157 [0xd] = { 158 "Model B rev2", 159 "bcm2835-rpi-b-rev2.dtb", 160 true, 161 }, 162 [0xe] = { 163 "Model B rev2", 164 "bcm2835-rpi-b-rev2.dtb", 165 true, 166 }, 167 [0xf] = { 168 "Model B rev2", 169 "bcm2835-rpi-b-rev2.dtb", 170 true, 171 }, 172 [0x10] = { 173 "Model B+", 174 "bcm2835-rpi-b-plus.dtb", 175 true, 176 }, 177 [0x11] = { 178 "Compute Module", 179 "bcm2835-rpi-cm.dtb", 180 false, 181 }, 182 [0x12] = { 183 "Model A+", 184 "bcm2835-rpi-a-plus.dtb", 185 false, 186 }, 187 [0x13] = { 188 "Model B+", 189 "bcm2835-rpi-b-plus.dtb", 190 true, 191 }, 192 [0x14] = { 193 "Compute Module", 194 "bcm2835-rpi-cm.dtb", 195 false, 196 }, 197 [0x15] = { 198 "Model A+", 199 "bcm2835-rpi-a-plus.dtb", 200 false, 201 }, 202 }; 203 204 static uint32_t revision; 205 static uint32_t rev_scheme; 206 static uint32_t rev_type; 207 static const struct rpi_model *model; 208 209 int dram_init(void) 210 { 211 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 212 int ret; 213 214 BCM2835_MBOX_INIT_HDR(msg); 215 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 216 217 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 218 if (ret) { 219 printf("bcm2835: Could not query ARM memory size\n"); 220 return -1; 221 } 222 223 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 224 225 return 0; 226 } 227 228 static void set_fdtfile(void) 229 { 230 const char *fdtfile; 231 232 if (getenv("fdtfile")) 233 return; 234 235 fdtfile = model->fdtfile; 236 setenv("fdtfile", fdtfile); 237 } 238 239 static void set_usbethaddr(void) 240 { 241 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 242 int ret; 243 244 if (!model->has_onboard_eth) 245 return; 246 247 if (getenv("usbethaddr")) 248 return; 249 250 BCM2835_MBOX_INIT_HDR(msg); 251 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 252 253 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 254 if (ret) { 255 printf("bcm2835: Could not query MAC address\n"); 256 /* Ignore error; not critical */ 257 return; 258 } 259 260 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 261 262 if (!getenv("ethaddr")) 263 setenv("ethaddr", getenv("usbethaddr")); 264 265 return; 266 } 267 268 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 269 static void set_board_info(void) 270 { 271 char s[11]; 272 273 snprintf(s, sizeof(s), "0x%X", revision); 274 setenv("board_revision", s); 275 snprintf(s, sizeof(s), "%d", rev_scheme); 276 setenv("board_rev_scheme", s); 277 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 278 snprintf(s, sizeof(s), "0x%X", rev_type); 279 setenv("board_rev", s); 280 setenv("board_name", model->name); 281 } 282 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 283 284 int misc_init_r(void) 285 { 286 set_fdtfile(); 287 set_usbethaddr(); 288 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 289 set_board_info(); 290 #endif 291 return 0; 292 } 293 294 static int power_on_module(u32 module) 295 { 296 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 297 int ret; 298 299 BCM2835_MBOX_INIT_HDR(msg_pwr); 300 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 301 SET_POWER_STATE); 302 msg_pwr->set_power_state.body.req.device_id = module; 303 msg_pwr->set_power_state.body.req.state = 304 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 305 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 306 307 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 308 &msg_pwr->hdr); 309 if (ret) { 310 printf("bcm2835: Could not set module %u power state\n", 311 module); 312 return -1; 313 } 314 315 return 0; 316 } 317 318 static void get_board_rev(void) 319 { 320 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 321 int ret; 322 const struct rpi_model *models; 323 uint32_t models_count; 324 325 BCM2835_MBOX_INIT_HDR(msg); 326 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 327 328 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 329 if (ret) { 330 printf("bcm2835: Could not query board revision\n"); 331 /* Ignore error; not critical */ 332 return; 333 } 334 335 /* 336 * For details of old-vs-new scheme, see: 337 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 338 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 339 * (a few posts down) 340 * 341 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 342 * lower byte to use as the board rev: 343 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 344 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 345 */ 346 revision = msg->get_board_rev.body.resp.rev; 347 if (revision & 0x800000) { 348 rev_scheme = 1; 349 rev_type = (revision >> 4) & 0xff; 350 models = rpi_models_new_scheme; 351 models_count = ARRAY_SIZE(rpi_models_new_scheme); 352 } else { 353 rev_scheme = 0; 354 rev_type = revision & 0xff; 355 models = rpi_models_old_scheme; 356 models_count = ARRAY_SIZE(rpi_models_old_scheme); 357 } 358 if (rev_type >= models_count) { 359 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 360 model = &rpi_model_unknown; 361 } else if (!models[rev_type].name) { 362 printf("RPI: Board rev 0x%x unknown\n", rev_type); 363 model = &rpi_model_unknown; 364 } else { 365 model = &models[rev_type]; 366 } 367 368 printf("RPI %s (0x%x)\n", model->name, revision); 369 } 370 371 int board_init(void) 372 { 373 get_board_rev(); 374 375 gd->bd->bi_boot_params = 0x100; 376 377 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 378 } 379 380 int board_mmc_init(bd_t *bis) 381 { 382 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 383 int ret; 384 385 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 386 387 BCM2835_MBOX_INIT_HDR(msg_clk); 388 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 389 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 390 391 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 392 if (ret) { 393 printf("bcm2835: Could not query eMMC clock rate\n"); 394 return -1; 395 } 396 397 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 398 msg_clk->get_clock_rate.body.resp.rate_hz); 399 } 400 401 int ft_board_setup(void *blob, bd_t *bd) 402 { 403 /* 404 * For now, we simply always add the simplefb DT node. Later, we 405 * should be more intelligent, and e.g. only do this if no enabled DT 406 * node exists for the "real" graphics driver. 407 */ 408 lcd_dt_simplefb_add_node(blob); 409 410 return 0; 411 } 412