1 /* 2 * board.c 3 * 4 * Board functions for TI AM335X based boards 5 * 6 * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #include <common.h> 20 #include <errno.h> 21 #include <spl.h> 22 #include <asm/arch/cpu.h> 23 #include <asm/arch/hardware.h> 24 #include <asm/arch/omap.h> 25 #include <asm/arch/ddr_defs.h> 26 #include <asm/arch/clock.h> 27 #include <asm/arch/gpio.h> 28 #include <asm/arch/mmc_host_def.h> 29 #include <asm/arch/sys_proto.h> 30 #include <asm/io.h> 31 #include <asm/emif.h> 32 #include <asm/gpio.h> 33 #include <i2c.h> 34 #include <miiphy.h> 35 #include <cpsw.h> 36 #include "board.h" 37 38 DECLARE_GLOBAL_DATA_PTR; 39 40 static struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE; 41 #ifdef CONFIG_SPL_BUILD 42 static struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE; 43 #endif 44 45 /* MII mode defines */ 46 #define MII_MODE_ENABLE 0x0 47 #define RGMII_MODE_ENABLE 0xA 48 49 /* GPIO that controls power to DDR on EVM-SK */ 50 #define GPIO_DDR_VTT_EN 7 51 52 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE; 53 54 static struct am335x_baseboard_id __attribute__((section (".data"))) header; 55 56 static inline int board_is_bone(void) 57 { 58 return !strncmp(header.name, "A335BONE", HDR_NAME_LEN); 59 } 60 61 static inline int board_is_bone_lt(void) 62 { 63 return !strncmp(header.name, "A335BNLT", HDR_NAME_LEN); 64 } 65 66 static inline int board_is_evm_sk(void) 67 { 68 return !strncmp("A335X_SK", header.name, HDR_NAME_LEN); 69 } 70 71 static inline int board_is_idk(void) 72 { 73 return !strncmp(header.config, "SKU#02", 6); 74 } 75 76 /* 77 * Read header information from EEPROM into global structure. 78 */ 79 static int read_eeprom(void) 80 { 81 /* Check if baseboard eeprom is available */ 82 if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) { 83 puts("Could not probe the EEPROM; something fundamentally " 84 "wrong on the I2C bus.\n"); 85 return -ENODEV; 86 } 87 88 /* read the eeprom using i2c */ 89 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)&header, 90 sizeof(header))) { 91 puts("Could not read the EEPROM; something fundamentally" 92 " wrong on the I2C bus.\n"); 93 return -EIO; 94 } 95 96 if (header.magic != 0xEE3355AA) { 97 /* 98 * read the eeprom using i2c again, 99 * but use only a 1 byte address 100 */ 101 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, 102 (uchar *)&header, sizeof(header))) { 103 puts("Could not read the EEPROM; something " 104 "fundamentally wrong on the I2C bus.\n"); 105 return -EIO; 106 } 107 108 if (header.magic != 0xEE3355AA) { 109 printf("Incorrect magic number (0x%x) in EEPROM\n", 110 header.magic); 111 return -EINVAL; 112 } 113 } 114 115 return 0; 116 } 117 118 /* UART Defines */ 119 #ifdef CONFIG_SPL_BUILD 120 #define UART_RESET (0x1 << 1) 121 #define UART_CLK_RUNNING_MASK 0x1 122 #define UART_SMART_IDLE_EN (0x1 << 0x3) 123 124 static void rtc32k_enable(void) 125 { 126 struct rtc_regs *rtc = (struct rtc_regs *)AM335X_RTC_BASE; 127 128 /* 129 * Unlock the RTC's registers. For more details please see the 130 * RTC_SS section of the TRM. In order to unlock we need to 131 * write these specific values (keys) in this order. 132 */ 133 writel(0x83e70b13, &rtc->kick0r); 134 writel(0x95a4f1e0, &rtc->kick1r); 135 136 /* Enable the RTC 32K OSC by setting bits 3 and 6. */ 137 writel((1 << 3) | (1 << 6), &rtc->osc); 138 } 139 140 static const struct ddr_data ddr2_data = { 141 .datardsratio0 = ((MT47H128M16RT25E_RD_DQS<<30) | 142 (MT47H128M16RT25E_RD_DQS<<20) | 143 (MT47H128M16RT25E_RD_DQS<<10) | 144 (MT47H128M16RT25E_RD_DQS<<0)), 145 .datawdsratio0 = ((MT47H128M16RT25E_WR_DQS<<30) | 146 (MT47H128M16RT25E_WR_DQS<<20) | 147 (MT47H128M16RT25E_WR_DQS<<10) | 148 (MT47H128M16RT25E_WR_DQS<<0)), 149 .datawiratio0 = ((MT47H128M16RT25E_PHY_WRLVL<<30) | 150 (MT47H128M16RT25E_PHY_WRLVL<<20) | 151 (MT47H128M16RT25E_PHY_WRLVL<<10) | 152 (MT47H128M16RT25E_PHY_WRLVL<<0)), 153 .datagiratio0 = ((MT47H128M16RT25E_PHY_GATELVL<<30) | 154 (MT47H128M16RT25E_PHY_GATELVL<<20) | 155 (MT47H128M16RT25E_PHY_GATELVL<<10) | 156 (MT47H128M16RT25E_PHY_GATELVL<<0)), 157 .datafwsratio0 = ((MT47H128M16RT25E_PHY_FIFO_WE<<30) | 158 (MT47H128M16RT25E_PHY_FIFO_WE<<20) | 159 (MT47H128M16RT25E_PHY_FIFO_WE<<10) | 160 (MT47H128M16RT25E_PHY_FIFO_WE<<0)), 161 .datawrsratio0 = ((MT47H128M16RT25E_PHY_WR_DATA<<30) | 162 (MT47H128M16RT25E_PHY_WR_DATA<<20) | 163 (MT47H128M16RT25E_PHY_WR_DATA<<10) | 164 (MT47H128M16RT25E_PHY_WR_DATA<<0)), 165 .datauserank0delay = MT47H128M16RT25E_PHY_RANK0_DELAY, 166 .datadldiff0 = PHY_DLL_LOCK_DIFF, 167 }; 168 169 static const struct cmd_control ddr2_cmd_ctrl_data = { 170 .cmd0csratio = MT47H128M16RT25E_RATIO, 171 .cmd0dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, 172 .cmd0iclkout = MT47H128M16RT25E_INVERT_CLKOUT, 173 174 .cmd1csratio = MT47H128M16RT25E_RATIO, 175 .cmd1dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, 176 .cmd1iclkout = MT47H128M16RT25E_INVERT_CLKOUT, 177 178 .cmd2csratio = MT47H128M16RT25E_RATIO, 179 .cmd2dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, 180 .cmd2iclkout = MT47H128M16RT25E_INVERT_CLKOUT, 181 }; 182 183 static const struct emif_regs ddr2_emif_reg_data = { 184 .sdram_config = MT47H128M16RT25E_EMIF_SDCFG, 185 .ref_ctrl = MT47H128M16RT25E_EMIF_SDREF, 186 .sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1, 187 .sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2, 188 .sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3, 189 .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY, 190 }; 191 192 static const struct ddr_data ddr3_data = { 193 .datardsratio0 = MT41J128MJT125_RD_DQS, 194 .datawdsratio0 = MT41J128MJT125_WR_DQS, 195 .datafwsratio0 = MT41J128MJT125_PHY_FIFO_WE, 196 .datawrsratio0 = MT41J128MJT125_PHY_WR_DATA, 197 .datadldiff0 = PHY_DLL_LOCK_DIFF, 198 }; 199 200 static const struct cmd_control ddr3_cmd_ctrl_data = { 201 .cmd0csratio = MT41J128MJT125_RATIO, 202 .cmd0dldiff = MT41J128MJT125_DLL_LOCK_DIFF, 203 .cmd0iclkout = MT41J128MJT125_INVERT_CLKOUT, 204 205 .cmd1csratio = MT41J128MJT125_RATIO, 206 .cmd1dldiff = MT41J128MJT125_DLL_LOCK_DIFF, 207 .cmd1iclkout = MT41J128MJT125_INVERT_CLKOUT, 208 209 .cmd2csratio = MT41J128MJT125_RATIO, 210 .cmd2dldiff = MT41J128MJT125_DLL_LOCK_DIFF, 211 .cmd2iclkout = MT41J128MJT125_INVERT_CLKOUT, 212 }; 213 214 static struct emif_regs ddr3_emif_reg_data = { 215 .sdram_config = MT41J128MJT125_EMIF_SDCFG, 216 .ref_ctrl = MT41J128MJT125_EMIF_SDREF, 217 .sdram_tim1 = MT41J128MJT125_EMIF_TIM1, 218 .sdram_tim2 = MT41J128MJT125_EMIF_TIM2, 219 .sdram_tim3 = MT41J128MJT125_EMIF_TIM3, 220 .zq_config = MT41J128MJT125_ZQ_CFG, 221 .emif_ddr_phy_ctlr_1 = MT41J128MJT125_EMIF_READ_LATENCY, 222 }; 223 #endif 224 225 /* 226 * early system init of muxing and clocks. 227 */ 228 void s_init(void) 229 { 230 /* WDT1 is already running when the bootloader gets control 231 * Disable it to avoid "random" resets 232 */ 233 writel(0xAAAA, &wdtimer->wdtwspr); 234 while (readl(&wdtimer->wdtwwps) != 0x0) 235 ; 236 writel(0x5555, &wdtimer->wdtwspr); 237 while (readl(&wdtimer->wdtwwps) != 0x0) 238 ; 239 240 #ifdef CONFIG_SPL_BUILD 241 /* Setup the PLLs and the clocks for the peripherals */ 242 pll_init(); 243 244 /* Enable RTC32K clock */ 245 rtc32k_enable(); 246 247 /* UART softreset */ 248 u32 regVal; 249 250 #ifdef CONFIG_SERIAL1 251 enable_uart0_pin_mux(); 252 #endif /* CONFIG_SERIAL1 */ 253 #ifdef CONFIG_SERIAL2 254 enable_uart1_pin_mux(); 255 #endif /* CONFIG_SERIAL2 */ 256 #ifdef CONFIG_SERIAL3 257 enable_uart2_pin_mux(); 258 #endif /* CONFIG_SERIAL3 */ 259 #ifdef CONFIG_SERIAL4 260 enable_uart3_pin_mux(); 261 #endif /* CONFIG_SERIAL4 */ 262 #ifdef CONFIG_SERIAL5 263 enable_uart4_pin_mux(); 264 #endif /* CONFIG_SERIAL5 */ 265 #ifdef CONFIG_SERIAL6 266 enable_uart5_pin_mux(); 267 #endif /* CONFIG_SERIAL6 */ 268 269 regVal = readl(&uart_base->uartsyscfg); 270 regVal |= UART_RESET; 271 writel(regVal, &uart_base->uartsyscfg); 272 while ((readl(&uart_base->uartsyssts) & 273 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK) 274 ; 275 276 /* Disable smart idle */ 277 regVal = readl(&uart_base->uartsyscfg); 278 regVal |= UART_SMART_IDLE_EN; 279 writel(regVal, &uart_base->uartsyscfg); 280 281 gd = &gdata; 282 283 preloader_console_init(); 284 285 /* Initalize the board header */ 286 enable_i2c0_pin_mux(); 287 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); 288 if (read_eeprom() < 0) 289 puts("Could not get board ID.\n"); 290 291 enable_board_pin_mux(&header); 292 if (board_is_evm_sk()) { 293 /* 294 * EVM SK 1.2A and later use gpio0_7 to enable DDR3. 295 * This is safe enough to do on older revs. 296 */ 297 gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en"); 298 gpio_direction_output(GPIO_DDR_VTT_EN, 1); 299 } 300 301 if (board_is_evm_sk() || board_is_bone_lt()) 302 config_ddr(303, MT41J128MJT125_IOCTRL_VALUE, &ddr3_data, 303 &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data); 304 else 305 config_ddr(266, MT47H128M16RT25E_IOCTRL_VALUE, &ddr2_data, 306 &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data); 307 #endif 308 } 309 310 /* 311 * Basic board specific setup. Pinmux has been handled already. 312 */ 313 int board_init(void) 314 { 315 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); 316 if (read_eeprom() < 0) 317 puts("Could not get board ID.\n"); 318 319 gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100; 320 321 return 0; 322 } 323 324 #ifdef CONFIG_BOARD_LATE_INIT 325 int board_late_init(void) 326 { 327 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 328 char safe_string[HDR_NAME_LEN + 1]; 329 330 /* Now set variables based on the header. */ 331 strncpy(safe_string, (char *)header.name, sizeof(header.name)); 332 safe_string[sizeof(header.name)] = 0; 333 setenv("board_name", safe_string); 334 335 strncpy(safe_string, (char *)header.version, sizeof(header.version)); 336 safe_string[sizeof(header.version)] = 0; 337 setenv("board_rev", safe_string); 338 #endif 339 340 return 0; 341 } 342 #endif 343 344 #ifdef CONFIG_DRIVER_TI_CPSW 345 static void cpsw_control(int enabled) 346 { 347 /* VTP can be added here */ 348 349 return; 350 } 351 352 static struct cpsw_slave_data cpsw_slaves[] = { 353 { 354 .slave_reg_ofs = 0x208, 355 .sliver_reg_ofs = 0xd80, 356 .phy_id = 0, 357 }, 358 { 359 .slave_reg_ofs = 0x308, 360 .sliver_reg_ofs = 0xdc0, 361 .phy_id = 1, 362 }, 363 }; 364 365 static struct cpsw_platform_data cpsw_data = { 366 .mdio_base = AM335X_CPSW_MDIO_BASE, 367 .cpsw_base = AM335X_CPSW_BASE, 368 .mdio_div = 0xff, 369 .channels = 8, 370 .cpdma_reg_ofs = 0x800, 371 .slaves = 1, 372 .slave_data = cpsw_slaves, 373 .ale_reg_ofs = 0xd00, 374 .ale_entries = 1024, 375 .host_port_reg_ofs = 0x108, 376 .hw_stats_reg_ofs = 0x900, 377 .mac_control = (1 << 5), 378 .control = cpsw_control, 379 .host_port_num = 0, 380 .version = CPSW_CTRL_VERSION_2, 381 }; 382 #endif 383 384 #if defined(CONFIG_DRIVER_TI_CPSW) || \ 385 (defined(CONFIG_USB_ETHER) && defined(CONFIG_MUSB_GADGET)) 386 int board_eth_init(bd_t *bis) 387 { 388 int rv, n = 0; 389 #ifdef CONFIG_DRIVER_TI_CPSW 390 uint8_t mac_addr[6]; 391 uint32_t mac_hi, mac_lo; 392 393 if (!eth_getenv_enetaddr("ethaddr", mac_addr)) { 394 debug("<ethaddr> not set. Reading from E-fuse\n"); 395 /* try reading mac address from efuse */ 396 mac_lo = readl(&cdev->macid0l); 397 mac_hi = readl(&cdev->macid0h); 398 mac_addr[0] = mac_hi & 0xFF; 399 mac_addr[1] = (mac_hi & 0xFF00) >> 8; 400 mac_addr[2] = (mac_hi & 0xFF0000) >> 16; 401 mac_addr[3] = (mac_hi & 0xFF000000) >> 24; 402 mac_addr[4] = mac_lo & 0xFF; 403 mac_addr[5] = (mac_lo & 0xFF00) >> 8; 404 405 if (is_valid_ether_addr(mac_addr)) 406 eth_setenv_enetaddr("ethaddr", mac_addr); 407 else 408 goto try_usbether; 409 } 410 411 if (board_is_bone() || board_is_bone_lt() || board_is_idk()) { 412 writel(MII_MODE_ENABLE, &cdev->miisel); 413 cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if = 414 PHY_INTERFACE_MODE_MII; 415 } else { 416 writel(RGMII_MODE_ENABLE, &cdev->miisel); 417 cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if = 418 PHY_INTERFACE_MODE_RGMII; 419 } 420 421 rv = cpsw_register(&cpsw_data); 422 if (rv < 0) 423 printf("Error %d registering CPSW switch\n", rv); 424 else 425 n += rv; 426 #endif 427 try_usbether: 428 #if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD) 429 rv = usb_eth_initialize(bis); 430 if (rv < 0) 431 printf("Error %d registering USB_ETHER\n", rv); 432 else 433 n += rv; 434 #endif 435 return n; 436 } 437 #endif 438