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 [BCM2835_BOARD_REV_B_I2C0_2] = { 88 "Model B (no P5)", 89 "bcm2835-rpi-b-i2c0.dtb", 90 true, 91 }, 92 [BCM2835_BOARD_REV_B_I2C0_3] = { 93 "Model B (no P5)", 94 "bcm2835-rpi-b-i2c0.dtb", 95 true, 96 }, 97 [BCM2835_BOARD_REV_B_I2C1_4] = { 98 "Model B", 99 "bcm2835-rpi-b.dtb", 100 true, 101 }, 102 [BCM2835_BOARD_REV_B_I2C1_5] = { 103 "Model B", 104 "bcm2835-rpi-b.dtb", 105 true, 106 }, 107 [BCM2835_BOARD_REV_B_I2C1_6] = { 108 "Model B", 109 "bcm2835-rpi-b.dtb", 110 true, 111 }, 112 [BCM2835_BOARD_REV_A_7] = { 113 "Model A", 114 "bcm2835-rpi-a.dtb", 115 false, 116 }, 117 [BCM2835_BOARD_REV_A_8] = { 118 "Model A", 119 "bcm2835-rpi-a.dtb", 120 false, 121 }, 122 [BCM2835_BOARD_REV_A_9] = { 123 "Model A", 124 "bcm2835-rpi-a.dtb", 125 false, 126 }, 127 [BCM2835_BOARD_REV_B_REV2_d] = { 128 "Model B rev2", 129 "bcm2835-rpi-b-rev2.dtb", 130 true, 131 }, 132 [BCM2835_BOARD_REV_B_REV2_e] = { 133 "Model B rev2", 134 "bcm2835-rpi-b-rev2.dtb", 135 true, 136 }, 137 [BCM2835_BOARD_REV_B_REV2_f] = { 138 "Model B rev2", 139 "bcm2835-rpi-b-rev2.dtb", 140 true, 141 }, 142 [BCM2835_BOARD_REV_B_PLUS] = { 143 "Model B+", 144 "bcm2835-rpi-b-plus.dtb", 145 true, 146 }, 147 [BCM2835_BOARD_REV_CM] = { 148 "Compute Module", 149 "bcm2835-rpi-cm.dtb", 150 false, 151 }, 152 }; 153 154 u32 rpi_board_rev = 0; 155 156 int dram_init(void) 157 { 158 ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16); 159 int ret; 160 161 BCM2835_MBOX_INIT_HDR(msg); 162 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 163 164 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 165 if (ret) { 166 printf("bcm2835: Could not query ARM memory size\n"); 167 return -1; 168 } 169 170 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 171 172 return 0; 173 } 174 175 static void set_fdtfile(void) 176 { 177 const char *fdtfile; 178 179 if (getenv("fdtfile")) 180 return; 181 182 fdtfile = models[rpi_board_rev].fdtfile; 183 if (!fdtfile) 184 fdtfile = "bcm2835-rpi-other.dtb"; 185 186 setenv("fdtfile", fdtfile); 187 } 188 189 static void set_usbethaddr(void) 190 { 191 ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16); 192 int ret; 193 194 if (!models[rpi_board_rev].has_onboard_eth) 195 return; 196 197 if (getenv("usbethaddr")) 198 return; 199 200 BCM2835_MBOX_INIT_HDR(msg); 201 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 202 203 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 204 if (ret) { 205 printf("bcm2835: Could not query MAC address\n"); 206 /* Ignore error; not critical */ 207 return; 208 } 209 210 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 211 212 return; 213 } 214 215 int misc_init_r(void) 216 { 217 set_fdtfile(); 218 set_usbethaddr(); 219 return 0; 220 } 221 222 static int power_on_module(u32 module) 223 { 224 ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16); 225 int ret; 226 227 BCM2835_MBOX_INIT_HDR(msg_pwr); 228 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 229 SET_POWER_STATE); 230 msg_pwr->set_power_state.body.req.device_id = module; 231 msg_pwr->set_power_state.body.req.state = 232 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 233 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 234 235 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 236 &msg_pwr->hdr); 237 if (ret) { 238 printf("bcm2835: Could not set module %u power state\n", 239 module); 240 return -1; 241 } 242 243 return 0; 244 } 245 246 static void get_board_rev(void) 247 { 248 ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16); 249 int ret; 250 const char *name; 251 252 BCM2835_MBOX_INIT_HDR(msg); 253 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 254 255 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 256 if (ret) { 257 printf("bcm2835: Could not query board revision\n"); 258 /* Ignore error; not critical */ 259 return; 260 } 261 262 rpi_board_rev = msg->get_board_rev.body.resp.rev; 263 if (rpi_board_rev >= ARRAY_SIZE(models)) 264 rpi_board_rev = 0; 265 266 name = models[rpi_board_rev].name; 267 if (!name) 268 name = "Unknown model"; 269 printf("RPI model: %s\n", name); 270 } 271 272 int board_init(void) 273 { 274 get_board_rev(); 275 276 gd->bd->bi_boot_params = 0x100; 277 278 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 279 } 280 281 int board_mmc_init(bd_t *bis) 282 { 283 ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16); 284 int ret; 285 286 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 287 288 BCM2835_MBOX_INIT_HDR(msg_clk); 289 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 290 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 291 292 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 293 if (ret) { 294 printf("bcm2835: Could not query eMMC clock rate\n"); 295 return -1; 296 } 297 298 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 299 msg_clk->get_clock_rate.body.resp.rate_hz); 300 } 301 302 int ft_board_setup(void *blob, bd_t *bd) 303 { 304 /* 305 * For now, we simply always add the simplefb DT node. Later, we 306 * should be more intelligent, and e.g. only do this if no enabled DT 307 * node exists for the "real" graphics driver. 308 */ 309 lcd_dt_simplefb_add_node(blob); 310 311 return 0; 312 } 313