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 /* See comments in mbox.h for data source */ 78 static const struct { 79 const char *name; 80 const char *fdtfile; 81 bool has_onboard_eth; 82 } models[] = { 83 [0] = { 84 "Unknown model", 85 #ifdef CONFIG_BCM2836 86 "bcm2836-rpi-other.dtb", 87 #else 88 "bcm2835-rpi-other.dtb", 89 #endif 90 false, 91 }, 92 #ifdef CONFIG_BCM2836 93 [BCM2836_BOARD_REV_2_B] = { 94 "2 Model B", 95 "bcm2836-rpi-2-b.dtb", 96 true, 97 }, 98 #else 99 [BCM2835_BOARD_REV_B_I2C0_2] = { 100 "Model B (no P5)", 101 "bcm2835-rpi-b-i2c0.dtb", 102 true, 103 }, 104 [BCM2835_BOARD_REV_B_I2C0_3] = { 105 "Model B (no P5)", 106 "bcm2835-rpi-b-i2c0.dtb", 107 true, 108 }, 109 [BCM2835_BOARD_REV_B_I2C1_4] = { 110 "Model B", 111 "bcm2835-rpi-b.dtb", 112 true, 113 }, 114 [BCM2835_BOARD_REV_B_I2C1_5] = { 115 "Model B", 116 "bcm2835-rpi-b.dtb", 117 true, 118 }, 119 [BCM2835_BOARD_REV_B_I2C1_6] = { 120 "Model B", 121 "bcm2835-rpi-b.dtb", 122 true, 123 }, 124 [BCM2835_BOARD_REV_A_7] = { 125 "Model A", 126 "bcm2835-rpi-a.dtb", 127 false, 128 }, 129 [BCM2835_BOARD_REV_A_8] = { 130 "Model A", 131 "bcm2835-rpi-a.dtb", 132 false, 133 }, 134 [BCM2835_BOARD_REV_A_9] = { 135 "Model A", 136 "bcm2835-rpi-a.dtb", 137 false, 138 }, 139 [BCM2835_BOARD_REV_B_REV2_d] = { 140 "Model B rev2", 141 "bcm2835-rpi-b-rev2.dtb", 142 true, 143 }, 144 [BCM2835_BOARD_REV_B_REV2_e] = { 145 "Model B rev2", 146 "bcm2835-rpi-b-rev2.dtb", 147 true, 148 }, 149 [BCM2835_BOARD_REV_B_REV2_f] = { 150 "Model B rev2", 151 "bcm2835-rpi-b-rev2.dtb", 152 true, 153 }, 154 [BCM2835_BOARD_REV_B_PLUS] = { 155 "Model B+", 156 "bcm2835-rpi-b-plus.dtb", 157 true, 158 }, 159 [BCM2835_BOARD_REV_CM] = { 160 "Compute Module", 161 "bcm2835-rpi-cm.dtb", 162 false, 163 }, 164 [BCM2835_BOARD_REV_A_PLUS] = { 165 "Model A+", 166 "bcm2835-rpi-a-plus.dtb", 167 false, 168 }, 169 [BCM2835_BOARD_REV_B_PLUS_13] = { 170 "Model B+", 171 "bcm2835-rpi-b-plus.dtb", 172 true, 173 }, 174 [BCM2835_BOARD_REV_CM_14] = { 175 "Compute Module", 176 "bcm2835-rpi-cm.dtb", 177 false, 178 }, 179 [BCM2835_BOARD_REV_A_PLUS_15] = { 180 "Model A+", 181 "bcm2835-rpi-a-plus.dtb", 182 false, 183 }, 184 #endif 185 }; 186 187 u32 rpi_board_rev = 0; 188 189 int dram_init(void) 190 { 191 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 192 int ret; 193 194 BCM2835_MBOX_INIT_HDR(msg); 195 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 196 197 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 198 if (ret) { 199 printf("bcm2835: Could not query ARM memory size\n"); 200 return -1; 201 } 202 203 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 204 205 return 0; 206 } 207 208 static void set_fdtfile(void) 209 { 210 const char *fdtfile; 211 212 if (getenv("fdtfile")) 213 return; 214 215 fdtfile = models[rpi_board_rev].fdtfile; 216 setenv("fdtfile", fdtfile); 217 } 218 219 static void set_usbethaddr(void) 220 { 221 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 222 int ret; 223 224 if (!models[rpi_board_rev].has_onboard_eth) 225 return; 226 227 if (getenv("usbethaddr")) 228 return; 229 230 BCM2835_MBOX_INIT_HDR(msg); 231 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 232 233 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 234 if (ret) { 235 printf("bcm2835: Could not query MAC address\n"); 236 /* Ignore error; not critical */ 237 return; 238 } 239 240 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 241 242 return; 243 } 244 245 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 246 static void set_board_info(void) 247 { 248 char str_rev[11]; 249 sprintf(str_rev, "0x%X", rpi_board_rev); 250 setenv("board_rev", str_rev); 251 setenv("board_name", models[rpi_board_rev].name); 252 } 253 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 254 255 int misc_init_r(void) 256 { 257 set_fdtfile(); 258 set_usbethaddr(); 259 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 260 set_board_info(); 261 #endif 262 return 0; 263 } 264 265 static int power_on_module(u32 module) 266 { 267 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 268 int ret; 269 270 BCM2835_MBOX_INIT_HDR(msg_pwr); 271 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 272 SET_POWER_STATE); 273 msg_pwr->set_power_state.body.req.device_id = module; 274 msg_pwr->set_power_state.body.req.state = 275 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 276 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 277 278 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 279 &msg_pwr->hdr); 280 if (ret) { 281 printf("bcm2835: Could not set module %u power state\n", 282 module); 283 return -1; 284 } 285 286 return 0; 287 } 288 289 static void get_board_rev(void) 290 { 291 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 292 int ret; 293 const char *name; 294 295 BCM2835_MBOX_INIT_HDR(msg); 296 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 297 298 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 299 if (ret) { 300 printf("bcm2835: Could not query board revision\n"); 301 /* Ignore error; not critical */ 302 return; 303 } 304 305 /* 306 * For details of old-vs-new scheme, see: 307 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 308 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 309 * (a few posts down) 310 * 311 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 312 * lower byte to use as the board rev: 313 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 314 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 315 */ 316 rpi_board_rev = msg->get_board_rev.body.resp.rev; 317 if (rpi_board_rev & 0x800000) 318 rpi_board_rev = (rpi_board_rev >> 4) & 0xff; 319 else 320 rpi_board_rev &= 0xff; 321 if (rpi_board_rev >= ARRAY_SIZE(models)) { 322 printf("RPI: Board rev %u outside known range\n", 323 rpi_board_rev); 324 rpi_board_rev = 0; 325 } 326 if (!models[rpi_board_rev].name) { 327 printf("RPI: Board rev %u unknown\n", rpi_board_rev); 328 rpi_board_rev = 0; 329 } 330 331 name = models[rpi_board_rev].name; 332 printf("RPI %s\n", name); 333 } 334 335 int board_init(void) 336 { 337 get_board_rev(); 338 339 gd->bd->bi_boot_params = 0x100; 340 341 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 342 } 343 344 int board_mmc_init(bd_t *bis) 345 { 346 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 347 int ret; 348 349 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 350 351 BCM2835_MBOX_INIT_HDR(msg_clk); 352 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 353 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 354 355 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 356 if (ret) { 357 printf("bcm2835: Could not query eMMC clock rate\n"); 358 return -1; 359 } 360 361 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 362 msg_clk->get_clock_rate.body.resp.rate_hz); 363 } 364 365 int ft_board_setup(void *blob, bd_t *bd) 366 { 367 /* 368 * For now, we simply always add the simplefb DT node. Later, we 369 * should be more intelligent, and e.g. only do this if no enabled DT 370 * node exists for the "real" graphics driver. 371 */ 372 lcd_dt_simplefb_add_node(blob); 373 374 return 0; 375 } 376