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 } models[] = { 86 [BCM2835_BOARD_REV_B_I2C0_2] = { 87 "Model B (no P5)", 88 "bcm2835-rpi-b-i2c0.dtb", 89 }, 90 [BCM2835_BOARD_REV_B_I2C0_3] = { 91 "Model B (no P5)", 92 "bcm2835-rpi-b-i2c0.dtb", 93 }, 94 [BCM2835_BOARD_REV_B_I2C1_4] = { 95 "Model B", 96 "bcm2835-rpi-b.dtb", 97 }, 98 [BCM2835_BOARD_REV_B_I2C1_5] = { 99 "Model B", 100 "bcm2835-rpi-b.dtb", 101 }, 102 [BCM2835_BOARD_REV_B_I2C1_6] = { 103 "Model B", 104 "bcm2835-rpi-b.dtb", 105 }, 106 [BCM2835_BOARD_REV_A_7] = { 107 "Model A", 108 "bcm2835-rpi-a.dtb", 109 }, 110 [BCM2835_BOARD_REV_A_8] = { 111 "Model A", 112 "bcm2835-rpi-a.dtb", 113 }, 114 [BCM2835_BOARD_REV_A_9] = { 115 "Model A", 116 "bcm2835-rpi-a.dtb", 117 }, 118 [BCM2835_BOARD_REV_B_REV2_d] = { 119 "Model B rev2", 120 "bcm2835-rpi-b-rev2.dtb", 121 }, 122 [BCM2835_BOARD_REV_B_REV2_e] = { 123 "Model B rev2", 124 "bcm2835-rpi-b-rev2.dtb", 125 }, 126 [BCM2835_BOARD_REV_B_REV2_f] = { 127 "Model B rev2", 128 "bcm2835-rpi-b-rev2.dtb", 129 }, 130 [BCM2835_BOARD_REV_B_PLUS] = { 131 "Model B+", 132 "bcm2835-rpi-b-plus.dtb", 133 }, 134 [BCM2835_BOARD_REV_CM] = { 135 "Compute Module", 136 "bcm2835-rpi-cm.dtb", 137 }, 138 }; 139 140 u32 rpi_board_rev = 0; 141 142 int dram_init(void) 143 { 144 ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16); 145 int ret; 146 147 BCM2835_MBOX_INIT_HDR(msg); 148 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 149 150 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 151 if (ret) { 152 printf("bcm2835: Could not query ARM memory size\n"); 153 return -1; 154 } 155 156 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 157 158 return 0; 159 } 160 161 static void set_fdtfile(void) 162 { 163 const char *fdtfile; 164 165 if (getenv("fdtfile")) 166 return; 167 168 fdtfile = models[rpi_board_rev].fdtfile; 169 if (!fdtfile) 170 fdtfile = "bcm2835-rpi-other.dtb"; 171 172 setenv("fdtfile", fdtfile); 173 } 174 175 static void set_usbethaddr(void) 176 { 177 ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16); 178 int ret; 179 180 if (getenv("usbethaddr")) 181 return; 182 183 BCM2835_MBOX_INIT_HDR(msg); 184 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 185 186 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 187 if (ret) { 188 printf("bcm2835: Could not query MAC address\n"); 189 /* Ignore error; not critical */ 190 return; 191 } 192 193 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 194 195 return; 196 } 197 198 int misc_init_r(void) 199 { 200 set_fdtfile(); 201 set_usbethaddr(); 202 return 0; 203 } 204 205 static int power_on_module(u32 module) 206 { 207 ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16); 208 int ret; 209 210 BCM2835_MBOX_INIT_HDR(msg_pwr); 211 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 212 SET_POWER_STATE); 213 msg_pwr->set_power_state.body.req.device_id = module; 214 msg_pwr->set_power_state.body.req.state = 215 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 216 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 217 218 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 219 &msg_pwr->hdr); 220 if (ret) { 221 printf("bcm2835: Could not set module %u power state\n", 222 module); 223 return -1; 224 } 225 226 return 0; 227 } 228 229 static void get_board_rev(void) 230 { 231 ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16); 232 int ret; 233 const char *name; 234 235 BCM2835_MBOX_INIT_HDR(msg); 236 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 237 238 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 239 if (ret) { 240 printf("bcm2835: Could not query board revision\n"); 241 /* Ignore error; not critical */ 242 return; 243 } 244 245 rpi_board_rev = msg->get_board_rev.body.resp.rev; 246 if (rpi_board_rev >= ARRAY_SIZE(models)) 247 rpi_board_rev = 0; 248 249 name = models[rpi_board_rev].name; 250 if (!name) 251 name = "Unknown model"; 252 printf("RPI model: %s\n", name); 253 } 254 255 int board_init(void) 256 { 257 get_board_rev(); 258 259 gd->bd->bi_boot_params = 0x100; 260 261 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 262 } 263 264 int board_mmc_init(bd_t *bis) 265 { 266 ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16); 267 int ret; 268 269 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 270 271 BCM2835_MBOX_INIT_HDR(msg_clk); 272 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 273 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 274 275 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 276 if (ret) { 277 printf("bcm2835: Could not query eMMC clock rate\n"); 278 return -1; 279 } 280 281 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 282 msg_clk->get_clock_rate.body.resp.rate_hz); 283 } 284 285 int ft_board_setup(void *blob, bd_t *bd) 286 { 287 /* 288 * For now, we simply always add the simplefb DT node. Later, we 289 * should be more intelligent, and e.g. only do this if no enabled DT 290 * node exists for the "real" graphics driver. 291 */ 292 lcd_dt_simplefb_add_node(blob); 293 294 return 0; 295 } 296