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 struct rpi_model { 83 const char *name; 84 const char *fdtfile; 85 bool has_onboard_eth; 86 }; 87 88 static const struct rpi_model rpi_model_unknown = { 89 "Unknown model", 90 #ifdef CONFIG_BCM2836 91 "bcm2836-rpi-other.dtb", 92 #else 93 "bcm2835-rpi-other.dtb", 94 #endif 95 false, 96 }; 97 98 static const struct rpi_model rpi_models_new_scheme[] = { 99 [0x4] = { 100 "2 Model B", 101 "bcm2836-rpi-2-b.dtb", 102 true, 103 }, 104 }; 105 106 static const struct rpi_model rpi_models_old_scheme[] = { 107 [0x2] = { 108 "Model B (no P5)", 109 "bcm2835-rpi-b-i2c0.dtb", 110 true, 111 }, 112 [0x3] = { 113 "Model B (no P5)", 114 "bcm2835-rpi-b-i2c0.dtb", 115 true, 116 }, 117 [0x4] = { 118 "Model B", 119 "bcm2835-rpi-b.dtb", 120 true, 121 }, 122 [0x5] = { 123 "Model B", 124 "bcm2835-rpi-b.dtb", 125 true, 126 }, 127 [0x6] = { 128 "Model B", 129 "bcm2835-rpi-b.dtb", 130 true, 131 }, 132 [0x7] = { 133 "Model A", 134 "bcm2835-rpi-a.dtb", 135 false, 136 }, 137 [0x8] = { 138 "Model A", 139 "bcm2835-rpi-a.dtb", 140 false, 141 }, 142 [0x9] = { 143 "Model A", 144 "bcm2835-rpi-a.dtb", 145 false, 146 }, 147 [0xd] = { 148 "Model B rev2", 149 "bcm2835-rpi-b-rev2.dtb", 150 true, 151 }, 152 [0xe] = { 153 "Model B rev2", 154 "bcm2835-rpi-b-rev2.dtb", 155 true, 156 }, 157 [0xf] = { 158 "Model B rev2", 159 "bcm2835-rpi-b-rev2.dtb", 160 true, 161 }, 162 [0x10] = { 163 "Model B+", 164 "bcm2835-rpi-b-plus.dtb", 165 true, 166 }, 167 [0x11] = { 168 "Compute Module", 169 "bcm2835-rpi-cm.dtb", 170 false, 171 }, 172 [0x12] = { 173 "Model A+", 174 "bcm2835-rpi-a-plus.dtb", 175 false, 176 }, 177 [0x13] = { 178 "Model B+", 179 "bcm2835-rpi-b-plus.dtb", 180 true, 181 }, 182 [0x14] = { 183 "Compute Module", 184 "bcm2835-rpi-cm.dtb", 185 false, 186 }, 187 [0x15] = { 188 "Model A+", 189 "bcm2835-rpi-a-plus.dtb", 190 false, 191 }, 192 }; 193 194 static uint32_t revision; 195 static uint32_t rev_scheme; 196 static uint32_t rev_type; 197 static const struct rpi_model *model; 198 199 int dram_init(void) 200 { 201 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 202 int ret; 203 204 BCM2835_MBOX_INIT_HDR(msg); 205 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 206 207 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 208 if (ret) { 209 printf("bcm2835: Could not query ARM memory size\n"); 210 return -1; 211 } 212 213 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 214 215 return 0; 216 } 217 218 static void set_fdtfile(void) 219 { 220 const char *fdtfile; 221 222 if (getenv("fdtfile")) 223 return; 224 225 fdtfile = model->fdtfile; 226 setenv("fdtfile", fdtfile); 227 } 228 229 static void set_usbethaddr(void) 230 { 231 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 232 int ret; 233 234 if (!model->has_onboard_eth) 235 return; 236 237 if (getenv("usbethaddr")) 238 return; 239 240 BCM2835_MBOX_INIT_HDR(msg); 241 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 242 243 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 244 if (ret) { 245 printf("bcm2835: Could not query MAC address\n"); 246 /* Ignore error; not critical */ 247 return; 248 } 249 250 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 251 252 return; 253 } 254 255 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 256 static void set_board_info(void) 257 { 258 char s[11]; 259 260 snprintf(s, sizeof(s), "0x%X", revision); 261 setenv("board_revision", s); 262 snprintf(s, sizeof(s), "%d", rev_scheme); 263 setenv("board_rev_scheme", s); 264 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 265 snprintf(s, sizeof(s), "0x%X", rev_type); 266 setenv("board_rev", s); 267 setenv("board_name", model->name); 268 } 269 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 270 271 int misc_init_r(void) 272 { 273 set_fdtfile(); 274 set_usbethaddr(); 275 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 276 set_board_info(); 277 #endif 278 return 0; 279 } 280 281 static int power_on_module(u32 module) 282 { 283 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 284 int ret; 285 286 BCM2835_MBOX_INIT_HDR(msg_pwr); 287 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 288 SET_POWER_STATE); 289 msg_pwr->set_power_state.body.req.device_id = module; 290 msg_pwr->set_power_state.body.req.state = 291 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 292 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 293 294 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 295 &msg_pwr->hdr); 296 if (ret) { 297 printf("bcm2835: Could not set module %u power state\n", 298 module); 299 return -1; 300 } 301 302 return 0; 303 } 304 305 static void get_board_rev(void) 306 { 307 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 308 int ret; 309 const struct rpi_model *models; 310 uint32_t models_count; 311 312 BCM2835_MBOX_INIT_HDR(msg); 313 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 314 315 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 316 if (ret) { 317 printf("bcm2835: Could not query board revision\n"); 318 /* Ignore error; not critical */ 319 return; 320 } 321 322 /* 323 * For details of old-vs-new scheme, see: 324 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 325 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 326 * (a few posts down) 327 * 328 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 329 * lower byte to use as the board rev: 330 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 331 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 332 */ 333 revision = msg->get_board_rev.body.resp.rev; 334 if (revision & 0x800000) { 335 rev_scheme = 1; 336 rev_type = (revision >> 4) & 0xff; 337 models = rpi_models_new_scheme; 338 models_count = ARRAY_SIZE(rpi_models_new_scheme); 339 } else { 340 rev_scheme = 0; 341 rev_type = revision & 0xff; 342 models = rpi_models_old_scheme; 343 models_count = ARRAY_SIZE(rpi_models_old_scheme); 344 } 345 if (rev_type >= models_count) { 346 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 347 model = &rpi_model_unknown; 348 } else if (!models[rev_type].name) { 349 printf("RPI: Board rev 0x%x unknown\n", rev_type); 350 model = &rpi_model_unknown; 351 } else { 352 model = &models[rev_type]; 353 } 354 355 printf("RPI %s (0x%x)\n", model->name, revision); 356 } 357 358 int board_init(void) 359 { 360 get_board_rev(); 361 362 gd->bd->bi_boot_params = 0x100; 363 364 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 365 } 366 367 int board_mmc_init(bd_t *bis) 368 { 369 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 370 int ret; 371 372 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 373 374 BCM2835_MBOX_INIT_HDR(msg_clk); 375 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 376 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 377 378 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 379 if (ret) { 380 printf("bcm2835: Could not query eMMC clock rate\n"); 381 return -1; 382 } 383 384 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 385 msg_clk->get_clock_rate.body.resp.rate_hz); 386 } 387 388 int ft_board_setup(void *blob, bd_t *bd) 389 { 390 /* 391 * For now, we simply always add the simplefb DT node. Later, we 392 * should be more intelligent, and e.g. only do this if no enabled DT 393 * node exists for the "real" graphics driver. 394 */ 395 lcd_dt_simplefb_add_node(blob); 396 397 return 0; 398 } 399