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