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 #endif 180 }; 181 182 u32 rpi_board_rev = 0; 183 184 int dram_init(void) 185 { 186 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 187 int ret; 188 189 BCM2835_MBOX_INIT_HDR(msg); 190 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 191 192 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 193 if (ret) { 194 printf("bcm2835: Could not query ARM memory size\n"); 195 return -1; 196 } 197 198 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 199 200 return 0; 201 } 202 203 static void set_fdtfile(void) 204 { 205 const char *fdtfile; 206 207 if (getenv("fdtfile")) 208 return; 209 210 fdtfile = models[rpi_board_rev].fdtfile; 211 setenv("fdtfile", fdtfile); 212 } 213 214 static void set_usbethaddr(void) 215 { 216 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 217 int ret; 218 219 if (!models[rpi_board_rev].has_onboard_eth) 220 return; 221 222 if (getenv("usbethaddr")) 223 return; 224 225 BCM2835_MBOX_INIT_HDR(msg); 226 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 227 228 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 229 if (ret) { 230 printf("bcm2835: Could not query MAC address\n"); 231 /* Ignore error; not critical */ 232 return; 233 } 234 235 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 236 237 return; 238 } 239 240 int misc_init_r(void) 241 { 242 set_fdtfile(); 243 set_usbethaddr(); 244 return 0; 245 } 246 247 static int power_on_module(u32 module) 248 { 249 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 250 int ret; 251 252 BCM2835_MBOX_INIT_HDR(msg_pwr); 253 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 254 SET_POWER_STATE); 255 msg_pwr->set_power_state.body.req.device_id = module; 256 msg_pwr->set_power_state.body.req.state = 257 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 258 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 259 260 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 261 &msg_pwr->hdr); 262 if (ret) { 263 printf("bcm2835: Could not set module %u power state\n", 264 module); 265 return -1; 266 } 267 268 return 0; 269 } 270 271 static void get_board_rev(void) 272 { 273 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 274 int ret; 275 const char *name; 276 277 BCM2835_MBOX_INIT_HDR(msg); 278 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 279 280 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 281 if (ret) { 282 printf("bcm2835: Could not query board revision\n"); 283 /* Ignore error; not critical */ 284 return; 285 } 286 287 /* 288 * For details of old-vs-new scheme, see: 289 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 290 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 291 * (a few posts down) 292 * 293 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 294 * lower byte to use as the board rev: 295 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 296 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 297 */ 298 rpi_board_rev = msg->get_board_rev.body.resp.rev; 299 if (rpi_board_rev & 0x800000) 300 rpi_board_rev = (rpi_board_rev >> 4) & 0xff; 301 else 302 rpi_board_rev &= 0xff; 303 if (rpi_board_rev >= ARRAY_SIZE(models)) { 304 printf("RPI: Board rev %u outside known range\n", 305 rpi_board_rev); 306 rpi_board_rev = 0; 307 } 308 if (!models[rpi_board_rev].name) { 309 printf("RPI: Board rev %u unknown\n", rpi_board_rev); 310 rpi_board_rev = 0; 311 } 312 313 name = models[rpi_board_rev].name; 314 printf("RPI %s\n", name); 315 } 316 317 int board_init(void) 318 { 319 get_board_rev(); 320 321 gd->bd->bi_boot_params = 0x100; 322 323 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 324 } 325 326 int board_mmc_init(bd_t *bis) 327 { 328 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 329 int ret; 330 331 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 332 333 BCM2835_MBOX_INIT_HDR(msg_clk); 334 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 335 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 336 337 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 338 if (ret) { 339 printf("bcm2835: Could not query eMMC clock rate\n"); 340 return -1; 341 } 342 343 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 344 msg_clk->get_clock_rate.body.resp.rate_hz); 345 } 346 347 int ft_board_setup(void *blob, bd_t *bd) 348 { 349 /* 350 * For now, we simply always add the simplefb DT node. Later, we 351 * should be more intelligent, and e.g. only do this if no enabled DT 352 * node exists for the "real" graphics driver. 353 */ 354 lcd_dt_simplefb_add_node(blob); 355 356 return 0; 357 } 358