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 <lcd.h> 22 #include <mmc.h> 23 #include <asm/gpio.h> 24 #include <asm/arch/mbox.h> 25 #include <asm/arch/sdhci.h> 26 #include <asm/global_data.h> 27 #include <dm/platform_data/serial_pl01x.h> 28 29 DECLARE_GLOBAL_DATA_PTR; 30 31 static const struct bcm2835_gpio_platdata gpio_platdata = { 32 .base = BCM2835_GPIO_BASE, 33 }; 34 35 U_BOOT_DEVICE(bcm2835_gpios) = { 36 .name = "gpio_bcm2835", 37 .platdata = &gpio_platdata, 38 }; 39 40 static const struct pl01x_serial_platdata serial_platdata = { 41 .base = 0x20201000, 42 .type = TYPE_PL011, 43 .clock = 3000000, 44 }; 45 46 U_BOOT_DEVICE(bcm2835_serials) = { 47 .name = "serial_pl01x", 48 .platdata = &serial_platdata, 49 }; 50 51 struct msg_get_arm_mem { 52 struct bcm2835_mbox_hdr hdr; 53 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 54 u32 end_tag; 55 }; 56 57 struct msg_get_board_rev { 58 struct bcm2835_mbox_hdr hdr; 59 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 60 u32 end_tag; 61 }; 62 63 struct msg_get_mac_address { 64 struct bcm2835_mbox_hdr hdr; 65 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 66 u32 end_tag; 67 }; 68 69 struct msg_set_power_state { 70 struct bcm2835_mbox_hdr hdr; 71 struct bcm2835_mbox_tag_set_power_state set_power_state; 72 u32 end_tag; 73 }; 74 75 struct msg_get_clock_rate { 76 struct bcm2835_mbox_hdr hdr; 77 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 78 u32 end_tag; 79 }; 80 81 /* See comments in mbox.h for data source */ 82 static const struct { 83 const char *name; 84 const char *fdtfile; 85 bool has_onboard_eth; 86 } models[] = { 87 [0] = { 88 "Unknown model", 89 "bcm2835-rpi-other.dtb", 90 false, 91 }, 92 [BCM2835_BOARD_REV_B_I2C0_2] = { 93 "Model B (no P5)", 94 "bcm2835-rpi-b-i2c0.dtb", 95 true, 96 }, 97 [BCM2835_BOARD_REV_B_I2C0_3] = { 98 "Model B (no P5)", 99 "bcm2835-rpi-b-i2c0.dtb", 100 true, 101 }, 102 [BCM2835_BOARD_REV_B_I2C1_4] = { 103 "Model B", 104 "bcm2835-rpi-b.dtb", 105 true, 106 }, 107 [BCM2835_BOARD_REV_B_I2C1_5] = { 108 "Model B", 109 "bcm2835-rpi-b.dtb", 110 true, 111 }, 112 [BCM2835_BOARD_REV_B_I2C1_6] = { 113 "Model B", 114 "bcm2835-rpi-b.dtb", 115 true, 116 }, 117 [BCM2835_BOARD_REV_A_7] = { 118 "Model A", 119 "bcm2835-rpi-a.dtb", 120 false, 121 }, 122 [BCM2835_BOARD_REV_A_8] = { 123 "Model A", 124 "bcm2835-rpi-a.dtb", 125 false, 126 }, 127 [BCM2835_BOARD_REV_A_9] = { 128 "Model A", 129 "bcm2835-rpi-a.dtb", 130 false, 131 }, 132 [BCM2835_BOARD_REV_B_REV2_d] = { 133 "Model B rev2", 134 "bcm2835-rpi-b-rev2.dtb", 135 true, 136 }, 137 [BCM2835_BOARD_REV_B_REV2_e] = { 138 "Model B rev2", 139 "bcm2835-rpi-b-rev2.dtb", 140 true, 141 }, 142 [BCM2835_BOARD_REV_B_REV2_f] = { 143 "Model B rev2", 144 "bcm2835-rpi-b-rev2.dtb", 145 true, 146 }, 147 [BCM2835_BOARD_REV_B_PLUS] = { 148 "Model B+", 149 "bcm2835-rpi-b-plus.dtb", 150 true, 151 }, 152 [BCM2835_BOARD_REV_CM] = { 153 "Compute Module", 154 "bcm2835-rpi-cm.dtb", 155 false, 156 }, 157 [BCM2835_BOARD_REV_A_PLUS] = { 158 "Model A+", 159 "bcm2835-rpi-a-plus.dtb", 160 false, 161 }, 162 }; 163 164 u32 rpi_board_rev = 0; 165 166 int dram_init(void) 167 { 168 ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16); 169 int ret; 170 171 BCM2835_MBOX_INIT_HDR(msg); 172 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 173 174 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 175 if (ret) { 176 printf("bcm2835: Could not query ARM memory size\n"); 177 return -1; 178 } 179 180 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 181 182 return 0; 183 } 184 185 static void set_fdtfile(void) 186 { 187 const char *fdtfile; 188 189 if (getenv("fdtfile")) 190 return; 191 192 fdtfile = models[rpi_board_rev].fdtfile; 193 setenv("fdtfile", fdtfile); 194 } 195 196 static void set_usbethaddr(void) 197 { 198 ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16); 199 int ret; 200 201 if (!models[rpi_board_rev].has_onboard_eth) 202 return; 203 204 if (getenv("usbethaddr")) 205 return; 206 207 BCM2835_MBOX_INIT_HDR(msg); 208 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 209 210 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 211 if (ret) { 212 printf("bcm2835: Could not query MAC address\n"); 213 /* Ignore error; not critical */ 214 return; 215 } 216 217 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 218 219 return; 220 } 221 222 int misc_init_r(void) 223 { 224 set_fdtfile(); 225 set_usbethaddr(); 226 return 0; 227 } 228 229 static int power_on_module(u32 module) 230 { 231 ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16); 232 int ret; 233 234 BCM2835_MBOX_INIT_HDR(msg_pwr); 235 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 236 SET_POWER_STATE); 237 msg_pwr->set_power_state.body.req.device_id = module; 238 msg_pwr->set_power_state.body.req.state = 239 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 240 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 241 242 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 243 &msg_pwr->hdr); 244 if (ret) { 245 printf("bcm2835: Could not set module %u power state\n", 246 module); 247 return -1; 248 } 249 250 return 0; 251 } 252 253 static void get_board_rev(void) 254 { 255 ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16); 256 int ret; 257 const char *name; 258 259 BCM2835_MBOX_INIT_HDR(msg); 260 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 261 262 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 263 if (ret) { 264 printf("bcm2835: Could not query board revision\n"); 265 /* Ignore error; not critical */ 266 return; 267 } 268 269 rpi_board_rev = msg->get_board_rev.body.resp.rev; 270 if (rpi_board_rev >= ARRAY_SIZE(models)) { 271 printf("RPI: Board rev %u outside known range\n", 272 rpi_board_rev); 273 rpi_board_rev = 0; 274 } 275 if (!models[rpi_board_rev].name) { 276 printf("RPI: Board rev %u unknown\n", rpi_board_rev); 277 rpi_board_rev = 0; 278 } 279 280 name = models[rpi_board_rev].name; 281 printf("RPI model: %s\n", name); 282 } 283 284 int board_init(void) 285 { 286 get_board_rev(); 287 288 gd->bd->bi_boot_params = 0x100; 289 290 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 291 } 292 293 int board_mmc_init(bd_t *bis) 294 { 295 ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16); 296 int ret; 297 298 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 299 300 BCM2835_MBOX_INIT_HDR(msg_clk); 301 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 302 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 303 304 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 305 if (ret) { 306 printf("bcm2835: Could not query eMMC clock rate\n"); 307 return -1; 308 } 309 310 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 311 msg_clk->get_clock_rate.body.resp.rate_hz); 312 } 313 314 int ft_board_setup(void *blob, bd_t *bd) 315 { 316 /* 317 * For now, we simply always add the simplefb DT node. Later, we 318 * should be more intelligent, and e.g. only do this if no enabled DT 319 * node exists for the "real" graphics driver. 320 */ 321 lcd_dt_simplefb_add_node(blob); 322 323 return 0; 324 } 325