1 /* 2 * (C) Copyright 2012-2013 Stephen Warren 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #include <common.h> 18 #include <config.h> 19 #include <dm.h> 20 #include <fdt_support.h> 21 #include <fdt_simplefb.h> 22 #include <lcd.h> 23 #include <mmc.h> 24 #include <asm/gpio.h> 25 #include <asm/arch/mbox.h> 26 #include <asm/arch/sdhci.h> 27 #include <asm/global_data.h> 28 #include <dm/platform_data/serial_pl01x.h> 29 30 DECLARE_GLOBAL_DATA_PTR; 31 32 static const struct bcm2835_gpio_platdata gpio_platdata = { 33 .base = BCM2835_GPIO_BASE, 34 }; 35 36 U_BOOT_DEVICE(bcm2835_gpios) = { 37 .name = "gpio_bcm2835", 38 .platdata = &gpio_platdata, 39 }; 40 41 static const struct pl01x_serial_platdata serial_platdata = { 42 .base = 0x20201000, 43 .type = TYPE_PL011, 44 .clock = 3000000, 45 }; 46 47 U_BOOT_DEVICE(bcm2835_serials) = { 48 .name = "serial_pl01x", 49 .platdata = &serial_platdata, 50 }; 51 52 struct msg_get_arm_mem { 53 struct bcm2835_mbox_hdr hdr; 54 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 55 u32 end_tag; 56 }; 57 58 struct msg_get_board_rev { 59 struct bcm2835_mbox_hdr hdr; 60 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 61 u32 end_tag; 62 }; 63 64 struct msg_get_mac_address { 65 struct bcm2835_mbox_hdr hdr; 66 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 67 u32 end_tag; 68 }; 69 70 struct msg_set_power_state { 71 struct bcm2835_mbox_hdr hdr; 72 struct bcm2835_mbox_tag_set_power_state set_power_state; 73 u32 end_tag; 74 }; 75 76 struct msg_get_clock_rate { 77 struct bcm2835_mbox_hdr hdr; 78 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 79 u32 end_tag; 80 }; 81 82 /* See comments in mbox.h for data source */ 83 static const struct { 84 const char *name; 85 const char *fdtfile; 86 bool has_onboard_eth; 87 } models[] = { 88 [0] = { 89 "Unknown model", 90 "bcm2835-rpi-other.dtb", 91 false, 92 }, 93 [BCM2835_BOARD_REV_B_I2C0_2] = { 94 "Model B (no P5)", 95 "bcm2835-rpi-b-i2c0.dtb", 96 true, 97 }, 98 [BCM2835_BOARD_REV_B_I2C0_3] = { 99 "Model B (no P5)", 100 "bcm2835-rpi-b-i2c0.dtb", 101 true, 102 }, 103 [BCM2835_BOARD_REV_B_I2C1_4] = { 104 "Model B", 105 "bcm2835-rpi-b.dtb", 106 true, 107 }, 108 [BCM2835_BOARD_REV_B_I2C1_5] = { 109 "Model B", 110 "bcm2835-rpi-b.dtb", 111 true, 112 }, 113 [BCM2835_BOARD_REV_B_I2C1_6] = { 114 "Model B", 115 "bcm2835-rpi-b.dtb", 116 true, 117 }, 118 [BCM2835_BOARD_REV_A_7] = { 119 "Model A", 120 "bcm2835-rpi-a.dtb", 121 false, 122 }, 123 [BCM2835_BOARD_REV_A_8] = { 124 "Model A", 125 "bcm2835-rpi-a.dtb", 126 false, 127 }, 128 [BCM2835_BOARD_REV_A_9] = { 129 "Model A", 130 "bcm2835-rpi-a.dtb", 131 false, 132 }, 133 [BCM2835_BOARD_REV_B_REV2_d] = { 134 "Model B rev2", 135 "bcm2835-rpi-b-rev2.dtb", 136 true, 137 }, 138 [BCM2835_BOARD_REV_B_REV2_e] = { 139 "Model B rev2", 140 "bcm2835-rpi-b-rev2.dtb", 141 true, 142 }, 143 [BCM2835_BOARD_REV_B_REV2_f] = { 144 "Model B rev2", 145 "bcm2835-rpi-b-rev2.dtb", 146 true, 147 }, 148 [BCM2835_BOARD_REV_B_PLUS] = { 149 "Model B+", 150 "bcm2835-rpi-b-plus.dtb", 151 true, 152 }, 153 [BCM2835_BOARD_REV_CM] = { 154 "Compute Module", 155 "bcm2835-rpi-cm.dtb", 156 false, 157 }, 158 [BCM2835_BOARD_REV_A_PLUS] = { 159 "Model A+", 160 "bcm2835-rpi-a-plus.dtb", 161 false, 162 }, 163 }; 164 165 u32 rpi_board_rev = 0; 166 167 int dram_init(void) 168 { 169 ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16); 170 int ret; 171 172 BCM2835_MBOX_INIT_HDR(msg); 173 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 174 175 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 176 if (ret) { 177 printf("bcm2835: Could not query ARM memory size\n"); 178 return -1; 179 } 180 181 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 182 183 return 0; 184 } 185 186 static void set_fdtfile(void) 187 { 188 const char *fdtfile; 189 190 if (getenv("fdtfile")) 191 return; 192 193 fdtfile = models[rpi_board_rev].fdtfile; 194 setenv("fdtfile", fdtfile); 195 } 196 197 static void set_usbethaddr(void) 198 { 199 ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16); 200 int ret; 201 202 if (!models[rpi_board_rev].has_onboard_eth) 203 return; 204 205 if (getenv("usbethaddr")) 206 return; 207 208 BCM2835_MBOX_INIT_HDR(msg); 209 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 210 211 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 212 if (ret) { 213 printf("bcm2835: Could not query MAC address\n"); 214 /* Ignore error; not critical */ 215 return; 216 } 217 218 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 219 220 return; 221 } 222 223 int misc_init_r(void) 224 { 225 set_fdtfile(); 226 set_usbethaddr(); 227 return 0; 228 } 229 230 static int power_on_module(u32 module) 231 { 232 ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16); 233 int ret; 234 235 BCM2835_MBOX_INIT_HDR(msg_pwr); 236 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 237 SET_POWER_STATE); 238 msg_pwr->set_power_state.body.req.device_id = module; 239 msg_pwr->set_power_state.body.req.state = 240 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 241 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 242 243 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 244 &msg_pwr->hdr); 245 if (ret) { 246 printf("bcm2835: Could not set module %u power state\n", 247 module); 248 return -1; 249 } 250 251 return 0; 252 } 253 254 static void get_board_rev(void) 255 { 256 ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16); 257 int ret; 258 const char *name; 259 260 BCM2835_MBOX_INIT_HDR(msg); 261 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 262 263 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 264 if (ret) { 265 printf("bcm2835: Could not query board revision\n"); 266 /* Ignore error; not critical */ 267 return; 268 } 269 270 rpi_board_rev = msg->get_board_rev.body.resp.rev; 271 if (rpi_board_rev >= ARRAY_SIZE(models)) { 272 printf("RPI: Board rev %u outside known range\n", 273 rpi_board_rev); 274 rpi_board_rev = 0; 275 } 276 if (!models[rpi_board_rev].name) { 277 printf("RPI: Board rev %u unknown\n", rpi_board_rev); 278 rpi_board_rev = 0; 279 } 280 281 name = models[rpi_board_rev].name; 282 printf("RPI model: %s\n", name); 283 } 284 285 int board_init(void) 286 { 287 get_board_rev(); 288 289 gd->bd->bi_boot_params = 0x100; 290 291 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 292 } 293 294 int board_mmc_init(bd_t *bis) 295 { 296 ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16); 297 int ret; 298 299 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 300 301 BCM2835_MBOX_INIT_HDR(msg_clk); 302 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 303 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 304 305 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 306 if (ret) { 307 printf("bcm2835: Could not query eMMC clock rate\n"); 308 return -1; 309 } 310 311 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 312 msg_clk->get_clock_rate.body.resp.rate_hz); 313 } 314 315 int ft_board_setup(void *blob, bd_t *bd) 316 { 317 /* 318 * For now, we simply always add the simplefb DT node. Later, we 319 * should be more intelligent, and e.g. only do this if no enabled DT 320 * node exists for the "real" graphics driver. 321 */ 322 lcd_dt_simplefb_add_node(blob); 323 324 return 0; 325 } 326