board/ti/am335x/board.c

   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       0x3A
  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 static int board_is_gp_evm(void)
  77 {
  78         return !strncmp("A33515BB", header.name, 8);
  79 }
  80
  81 int board_is_evm_15_or_later(void)
  82 {
  83         return (!strncmp("A33515BB", header.name, 8) &&
  84                 strncmp("1.5", header.version, 3) <= 0);
  85 }
  86
  87 /*
  88  * Read header information from EEPROM into global structure.
  89  */
  90 static int read_eeprom(void)
  91 {
  92         /* Check if baseboard eeprom is available */
  93         if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) {
  94                 puts("Could not probe the EEPROM; something fundamentally "
  95                         "wrong on the I2C bus.\n");
  96                 return -ENODEV;
  97         }
  98
  99         /* read the eeprom using i2c */
 100         if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)&header,
 101                                                         sizeof(header))) {
 102                 puts("Could not read the EEPROM; something fundamentally"
 103                         " wrong on the I2C bus.\n");
 104                 return -EIO;
 105         }
 106
 107         if (header.magic != 0xEE3355AA) {
 108                 /*
 109                  * read the eeprom using i2c again,
 110                  * but use only a 1 byte address
 111                  */
 112                 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1,
 113                                         (uchar *)&header, sizeof(header))) {
 114                         puts("Could not read the EEPROM; something "
 115                                 "fundamentally wrong on the I2C bus.\n");
 116                         return -EIO;
 117                 }
 118
 119                 if (header.magic != 0xEE3355AA) {
 120                         printf("Incorrect magic number (0x%x) in EEPROM\n",
 121                                         header.magic);
 122                         return -EINVAL;
 123                 }
 124         }
 125
 126         return 0;
 127 }
 128
 129 /* UART Defines */
 130 #ifdef CONFIG_SPL_BUILD
 131 #define UART_RESET              (0x1 << 1)
 132 #define UART_CLK_RUNNING_MASK   0x1
 133 #define UART_SMART_IDLE_EN      (0x1 << 0x3)
 134
 135 static void rtc32k_enable(void)
 136 {
 137         struct rtc_regs *rtc = (struct rtc_regs *)AM335X_RTC_BASE;
 138
 139         /*
 140          * Unlock the RTC's registers.  For more details please see the
 141          * RTC_SS section of the TRM.  In order to unlock we need to
 142          * write these specific values (keys) in this order.
 143          */
 144         writel(0x83e70b13, &rtc->kick0r);
 145         writel(0x95a4f1e0, &rtc->kick1r);
 146
 147         /* Enable the RTC 32K OSC by setting bits 3 and 6. */
 148         writel((1 << 3) | (1 << 6), &rtc->osc);
 149 }
 150
 151 static const struct ddr_data ddr2_data = {
 152         .datardsratio0 = ((MT47H128M16RT25E_RD_DQS<<30) |
 153                           (MT47H128M16RT25E_RD_DQS<<20) |
 154                           (MT47H128M16RT25E_RD_DQS<<10) |
 155                           (MT47H128M16RT25E_RD_DQS<<0)),
 156         .datawdsratio0 = ((MT47H128M16RT25E_WR_DQS<<30) |
 157                           (MT47H128M16RT25E_WR_DQS<<20) |
 158                           (MT47H128M16RT25E_WR_DQS<<10) |
 159                           (MT47H128M16RT25E_WR_DQS<<0)),
 160         .datawiratio0 = ((MT47H128M16RT25E_PHY_WRLVL<<30) |
 161                          (MT47H128M16RT25E_PHY_WRLVL<<20) |
 162                          (MT47H128M16RT25E_PHY_WRLVL<<10) |
 163                          (MT47H128M16RT25E_PHY_WRLVL<<0)),
 164         .datagiratio0 = ((MT47H128M16RT25E_PHY_GATELVL<<30) |
 165                          (MT47H128M16RT25E_PHY_GATELVL<<20) |
 166                          (MT47H128M16RT25E_PHY_GATELVL<<10) |
 167                          (MT47H128M16RT25E_PHY_GATELVL<<0)),
 168         .datafwsratio0 = ((MT47H128M16RT25E_PHY_FIFO_WE<<30) |
 169                           (MT47H128M16RT25E_PHY_FIFO_WE<<20) |
 170                           (MT47H128M16RT25E_PHY_FIFO_WE<<10) |
 171                           (MT47H128M16RT25E_PHY_FIFO_WE<<0)),
 172         .datawrsratio0 = ((MT47H128M16RT25E_PHY_WR_DATA<<30) |
 173                           (MT47H128M16RT25E_PHY_WR_DATA<<20) |
 174                           (MT47H128M16RT25E_PHY_WR_DATA<<10) |
 175                           (MT47H128M16RT25E_PHY_WR_DATA<<0)),
 176         .datauserank0delay = MT47H128M16RT25E_PHY_RANK0_DELAY,
 177         .datadldiff0 = PHY_DLL_LOCK_DIFF,
 178 };
 179
 180 static const struct cmd_control ddr2_cmd_ctrl_data = {
 181         .cmd0csratio = MT47H128M16RT25E_RATIO,
 182         .cmd0dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF,
 183         .cmd0iclkout = MT47H128M16RT25E_INVERT_CLKOUT,
 184
 185         .cmd1csratio = MT47H128M16RT25E_RATIO,
 186         .cmd1dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF,
 187         .cmd1iclkout = MT47H128M16RT25E_INVERT_CLKOUT,
 188
 189         .cmd2csratio = MT47H128M16RT25E_RATIO,
 190         .cmd2dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF,
 191         .cmd2iclkout = MT47H128M16RT25E_INVERT_CLKOUT,
 192 };
 193
 194 static const struct emif_regs ddr2_emif_reg_data = {
 195         .sdram_config = MT47H128M16RT25E_EMIF_SDCFG,
 196         .ref_ctrl = MT47H128M16RT25E_EMIF_SDREF,
 197         .sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1,
 198         .sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2,
 199         .sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3,
 200         .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY,
 201 };
 202
 203 static const struct ddr_data ddr3_data = {
 204         .datardsratio0 = MT41J128MJT125_RD_DQS,
 205         .datawdsratio0 = MT41J128MJT125_WR_DQS,
 206         .datafwsratio0 = MT41J128MJT125_PHY_FIFO_WE,
 207         .datawrsratio0 = MT41J128MJT125_PHY_WR_DATA,
 208         .datadldiff0 = PHY_DLL_LOCK_DIFF,
 209 };
 210
 211 static const struct ddr_data ddr3_evm_data = {
 212         .datardsratio0 = MT41J512M8RH125_RD_DQS,
 213         .datawdsratio0 = MT41J512M8RH125_WR_DQS,
 214         .datafwsratio0 = MT41J512M8RH125_PHY_FIFO_WE,
 215         .datawrsratio0 = MT41J512M8RH125_PHY_WR_DATA,
 216         .datadldiff0 = PHY_DLL_LOCK_DIFF,
 217 };
 218
 219 static const struct cmd_control ddr3_cmd_ctrl_data = {
 220         .cmd0csratio = MT41J128MJT125_RATIO,
 221         .cmd0dldiff = MT41J128MJT125_DLL_LOCK_DIFF,
 222         .cmd0iclkout = MT41J128MJT125_INVERT_CLKOUT,
 223
 224         .cmd1csratio = MT41J128MJT125_RATIO,
 225         .cmd1dldiff = MT41J128MJT125_DLL_LOCK_DIFF,
 226         .cmd1iclkout = MT41J128MJT125_INVERT_CLKOUT,
 227
 228         .cmd2csratio = MT41J128MJT125_RATIO,
 229         .cmd2dldiff = MT41J128MJT125_DLL_LOCK_DIFF,
 230         .cmd2iclkout = MT41J128MJT125_INVERT_CLKOUT,
 231 };
 232
 233 static const struct cmd_control ddr3_evm_cmd_ctrl_data = {
 234         .cmd0csratio = MT41J512M8RH125_RATIO,
 235         .cmd0dldiff = MT41J512M8RH125_DLL_LOCK_DIFF,
 236         .cmd0iclkout = MT41J512M8RH125_INVERT_CLKOUT,
 237
 238         .cmd1csratio = MT41J512M8RH125_RATIO,
 239         .cmd1dldiff = MT41J512M8RH125_DLL_LOCK_DIFF,
 240         .cmd1iclkout = MT41J512M8RH125_INVERT_CLKOUT,
 241
 242         .cmd2csratio = MT41J512M8RH125_RATIO,
 243         .cmd2dldiff = MT41J512M8RH125_DLL_LOCK_DIFF,
 244         .cmd2iclkout = MT41J512M8RH125_INVERT_CLKOUT,
 245 };
 246
 247 static struct emif_regs ddr3_emif_reg_data = {
 248         .sdram_config = MT41J128MJT125_EMIF_SDCFG,
 249         .ref_ctrl = MT41J128MJT125_EMIF_SDREF,
 250         .sdram_tim1 = MT41J128MJT125_EMIF_TIM1,
 251         .sdram_tim2 = MT41J128MJT125_EMIF_TIM2,
 252         .sdram_tim3 = MT41J128MJT125_EMIF_TIM3,
 253         .zq_config = MT41J128MJT125_ZQ_CFG,
 254         .emif_ddr_phy_ctlr_1 = MT41J128MJT125_EMIF_READ_LATENCY,
 255 };
 256
 257 static struct emif_regs ddr3_evm_emif_reg_data = {
 258         .sdram_config = MT41J512M8RH125_EMIF_SDCFG,
 259         .ref_ctrl = MT41J512M8RH125_EMIF_SDREF,
 260         .sdram_tim1 = MT41J512M8RH125_EMIF_TIM1,
 261         .sdram_tim2 = MT41J512M8RH125_EMIF_TIM2,
 262         .sdram_tim3 = MT41J512M8RH125_EMIF_TIM3,
 263         .zq_config = MT41J512M8RH125_ZQ_CFG,
 264         .emif_ddr_phy_ctlr_1 = MT41J512M8RH125_EMIF_READ_LATENCY,
 265 };
 266 #endif
 267
 268 /*
 269  * early system init of muxing and clocks.
 270  */
 271 void s_init(void)
 272 {
 273         /* WDT1 is already running when the bootloader gets control
 274          * Disable it to avoid "random" resets
 275          */
 276         writel(0xAAAA, &wdtimer->wdtwspr);
 277         while (readl(&wdtimer->wdtwwps) != 0x0)
 278                 ;
 279         writel(0x5555, &wdtimer->wdtwspr);
 280         while (readl(&wdtimer->wdtwwps) != 0x0)
 281                 ;
 282
 283 #ifdef CONFIG_SPL_BUILD
 284         /* Setup the PLLs and the clocks for the peripherals */
 285         pll_init();
 286
 287         /* Enable RTC32K clock */
 288         rtc32k_enable();
 289
 290         /* UART softreset */
 291         u32 regVal;
 292
 293 #ifdef CONFIG_SERIAL1
 294         enable_uart0_pin_mux();
 295 #endif /* CONFIG_SERIAL1 */
 296 #ifdef CONFIG_SERIAL2
 297         enable_uart1_pin_mux();
 298 #endif /* CONFIG_SERIAL2 */
 299 #ifdef CONFIG_SERIAL3
 300         enable_uart2_pin_mux();
 301 #endif /* CONFIG_SERIAL3 */
 302 #ifdef CONFIG_SERIAL4
 303         enable_uart3_pin_mux();
 304 #endif /* CONFIG_SERIAL4 */
 305 #ifdef CONFIG_SERIAL5
 306         enable_uart4_pin_mux();
 307 #endif /* CONFIG_SERIAL5 */
 308 #ifdef CONFIG_SERIAL6
 309         enable_uart5_pin_mux();
 310 #endif /* CONFIG_SERIAL6 */
 311
 312         regVal = readl(&uart_base->uartsyscfg);
 313         regVal |= UART_RESET;
 314         writel(regVal, &uart_base->uartsyscfg);
 315         while ((readl(&uart_base->uartsyssts) &
 316                 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
 317                 ;
 318
 319         /* Disable smart idle */
 320         regVal = readl(&uart_base->uartsyscfg);
 321         regVal |= UART_SMART_IDLE_EN;
 322         writel(regVal, &uart_base->uartsyscfg);
 323
 324         gd = &gdata;
 325
 326         preloader_console_init();
 327
 328         /* Initalize the board header */
 329         enable_i2c0_pin_mux();
 330         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 331         if (read_eeprom() < 0)
 332                 puts("Could not get board ID.\n");
 333
 334         enable_board_pin_mux(&header);
 335         if (board_is_evm_sk()) {
 336                 /*
 337                  * EVM SK 1.2A and later use gpio0_7 to enable DDR3.
 338                  * This is safe enough to do on older revs.
 339                  */
 340                 gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en");
 341                 gpio_direction_output(GPIO_DDR_VTT_EN, 1);
 342         }
 343
 344         if (board_is_evm_sk() || board_is_bone_lt())
 345                 config_ddr(303, MT41J128MJT125_IOCTRL_VALUE, &ddr3_data,
 346                            &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data);
 347         else if (board_is_evm_15_or_later())
 348                 config_ddr(303, MT41J512M8RH125_IOCTRL_VALUE, &ddr3_evm_data,
 349                            &ddr3_evm_cmd_ctrl_data, &ddr3_evm_emif_reg_data);
 350         else
 351                 config_ddr(266, MT47H128M16RT25E_IOCTRL_VALUE, &ddr2_data,
 352                            &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data);
 353 #endif
 354 }
 355
 356 /*
 357  * Basic board specific setup.  Pinmux has been handled already.
 358  */
 359 int board_init(void)
 360 {
 361         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 362         if (read_eeprom() < 0)
 363                 puts("Could not get board ID.\n");
 364
 365         gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;
 366
 367         gpmc_init();
 368
 369         return 0;
 370 }
 371
 372 #ifdef CONFIG_BOARD_LATE_INIT
 373 int board_late_init(void)
 374 {
 375 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 376         char safe_string[HDR_NAME_LEN + 1];
 377
 378         /* Now set variables based on the header. */
 379         strncpy(safe_string, (char *)header.name, sizeof(header.name));
 380         safe_string[sizeof(header.name)] = 0;
 381         setenv("board_name", safe_string);
 382
 383         strncpy(safe_string, (char *)header.version, sizeof(header.version));
 384         safe_string[sizeof(header.version)] = 0;
 385         setenv("board_rev", safe_string);
 386 #endif
 387
 388         return 0;
 389 }
 390 #endif
 391
 392 #ifdef CONFIG_DRIVER_TI_CPSW
 393 static void cpsw_control(int enabled)
 394 {
 395         /* VTP can be added here */
 396
 397         return;
 398 }
 399
 400 static struct cpsw_slave_data cpsw_slaves[] = {
 401         {
 402                 .slave_reg_ofs  = 0x208,
 403                 .sliver_reg_ofs = 0xd80,
 404                 .phy_id         = 0,
 405         },
 406         {
 407                 .slave_reg_ofs  = 0x308,
 408                 .sliver_reg_ofs = 0xdc0,
 409                 .phy_id         = 1,
 410         },
 411 };
 412
 413 static struct cpsw_platform_data cpsw_data = {
 414         .mdio_base              = AM335X_CPSW_MDIO_BASE,
 415         .cpsw_base              = AM335X_CPSW_BASE,
 416         .mdio_div               = 0xff,
 417         .channels               = 8,
 418         .cpdma_reg_ofs          = 0x800,
 419         .slaves                 = 1,
 420         .slave_data             = cpsw_slaves,
 421         .ale_reg_ofs            = 0xd00,
 422         .ale_entries            = 1024,
 423         .host_port_reg_ofs      = 0x108,
 424         .hw_stats_reg_ofs       = 0x900,
 425         .mac_control            = (1 << 5),
 426         .control                = cpsw_control,
 427         .host_port_num          = 0,
 428         .version                = CPSW_CTRL_VERSION_2,
 429 };
 430 #endif
 431
 432 #if defined(CONFIG_DRIVER_TI_CPSW) || \
 433         (defined(CONFIG_USB_ETHER) && defined(CONFIG_MUSB_GADGET))
 434 int board_eth_init(bd_t *bis)
 435 {
 436         int rv, n = 0;
 437 #ifdef CONFIG_DRIVER_TI_CPSW
 438         uint8_t mac_addr[6];
 439         uint32_t mac_hi, mac_lo;
 440
 441         if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
 442                 printf("<ethaddr> not set. Reading from E-fuse\n");
 443                 /* try reading mac address from efuse */
 444                 mac_lo = readl(&cdev->macid0l);
 445                 mac_hi = readl(&cdev->macid0h);
 446                 mac_addr[0] = mac_hi & 0xFF;
 447                 mac_addr[1] = (mac_hi & 0xFF00) >> 8;
 448                 mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
 449                 mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
 450                 mac_addr[4] = mac_lo & 0xFF;
 451                 mac_addr[5] = (mac_lo & 0xFF00) >> 8;
 452
 453                 if (is_valid_ether_addr(mac_addr))
 454                         eth_setenv_enetaddr("ethaddr", mac_addr);
 455                 else
 456                         goto try_usbether;
 457         }
 458
 459         if (board_is_bone() || board_is_bone_lt() || board_is_idk()) {
 460                 writel(MII_MODE_ENABLE, &cdev->miisel);
 461                 cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
 462                                 PHY_INTERFACE_MODE_MII;
 463         } else {
 464                 writel(RGMII_MODE_ENABLE, &cdev->miisel);
 465                 cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
 466                                 PHY_INTERFACE_MODE_RGMII;
 467         }
 468
 469         rv = cpsw_register(&cpsw_data);
 470         if (rv < 0)
 471                 printf("Error %d registering CPSW switch\n", rv);
 472         else
 473                 n += rv;
 474
 475         /*
 476          *
 477          * CPSW RGMII Internal Delay Mode is not supported in all PVT
 478          * operating points.  So we must set the TX clock delay feature
 479          * in the AR8051 PHY.  Since we only support a single ethernet
 480          * device in U-Boot, we only do this for the first instance.
 481          */
 482 #define AR8051_PHY_DEBUG_ADDR_REG       0x1d
 483 #define AR8051_PHY_DEBUG_DATA_REG       0x1e
 484 #define AR8051_DEBUG_RGMII_CLK_DLY_REG  0x5
 485 #define AR8051_RGMII_TX_CLK_DLY         0x100
 486
 487         if (board_is_evm_sk() || board_is_gp_evm()) {
 488                 const char *devname;
 489                 devname = miiphy_get_current_dev();
 490
 491                 miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_ADDR_REG,
 492                                 AR8051_DEBUG_RGMII_CLK_DLY_REG);
 493                 miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_DATA_REG,
 494                                 AR8051_RGMII_TX_CLK_DLY);
 495         }
 496 #endif
 497 try_usbether:
 498 #if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD)
 499         rv = usb_eth_initialize(bis);
 500         if (rv < 0)
 501                 printf("Error %d registering USB_ETHER\n", rv);
 502         else
 503                 n += rv;
 504 #endif
 505         return n;
 506 }
 507 #endif