1 /* 2 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ 3 * 4 * Based on da830evm.c. Original Copyrights follow: 5 * 6 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com> 7 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <i2c.h> 14 #include <net.h> 15 #include <netdev.h> 16 #include <spi.h> 17 #include <spi_flash.h> 18 #include <asm/arch/hardware.h> 19 #include <asm/ti-common/davinci_nand.h> 20 #include <asm/arch/emac_defs.h> 21 #include <asm/arch/pinmux_defs.h> 22 #include <asm/io.h> 23 #include <asm/arch/davinci_misc.h> 24 #include <linux/errno.h> 25 #include <hwconfig.h> 26 #include <asm/mach-types.h> 27 28 #ifdef CONFIG_MMC_DAVINCI 29 #include <mmc.h> 30 #include <asm/arch/sdmmc_defs.h> 31 #endif 32 33 DECLARE_GLOBAL_DATA_PTR; 34 35 #ifdef CONFIG_DRIVER_TI_EMAC 36 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII 37 #define HAS_RMII 1 38 #else 39 #define HAS_RMII 0 40 #endif 41 #endif /* CONFIG_DRIVER_TI_EMAC */ 42 43 #define CFG_MAC_ADDR_SPI_BUS 0 44 #define CFG_MAC_ADDR_SPI_CS 0 45 #define CFG_MAC_ADDR_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED 46 #define CFG_MAC_ADDR_SPI_MODE SPI_MODE_3 47 48 #define CFG_MAC_ADDR_OFFSET (flash->size - SZ_64K) 49 50 #ifdef CONFIG_MAC_ADDR_IN_SPIFLASH 51 static int get_mac_addr(u8 *addr) 52 { 53 struct spi_flash *flash; 54 int ret; 55 56 flash = spi_flash_probe(CFG_MAC_ADDR_SPI_BUS, CFG_MAC_ADDR_SPI_CS, 57 CFG_MAC_ADDR_SPI_MAX_HZ, CFG_MAC_ADDR_SPI_MODE); 58 if (!flash) { 59 printf("Error - unable to probe SPI flash.\n"); 60 return -1; 61 } 62 63 ret = spi_flash_read(flash, (CFG_MAC_ADDR_OFFSET) + 1, 7, addr); 64 if (ret) { 65 printf("Error - unable to read MAC address from SPI flash.\n"); 66 return -1; 67 } 68 69 return ret; 70 } 71 #endif 72 73 void dsp_lpsc_on(unsigned domain, unsigned int id) 74 { 75 dv_reg_p mdstat, mdctl, ptstat, ptcmd; 76 struct davinci_psc_regs *psc_regs; 77 78 psc_regs = davinci_psc0_regs; 79 mdstat = &psc_regs->psc0.mdstat[id]; 80 mdctl = &psc_regs->psc0.mdctl[id]; 81 ptstat = &psc_regs->ptstat; 82 ptcmd = &psc_regs->ptcmd; 83 84 while (*ptstat & (0x1 << domain)) 85 ; 86 87 if ((*mdstat & 0x1f) == 0x03) 88 return; /* Already on and enabled */ 89 90 *mdctl |= 0x03; 91 92 *ptcmd = 0x1 << domain; 93 94 while (*ptstat & (0x1 << domain)) 95 ; 96 while ((*mdstat & 0x1f) != 0x03) 97 ; /* Probably an overkill... */ 98 } 99 100 static void dspwake(void) 101 { 102 unsigned *resetvect = (unsigned *)DAVINCI_L3CBARAM_BASE; 103 u32 val; 104 105 /* if the device is ARM only, return */ 106 if ((readl(CHIP_REV_ID_REG) & 0x3f) == 0x10) 107 return; 108 109 if (hwconfig_subarg_cmp_f("dsp", "wake", "no", NULL)) 110 return; 111 112 *resetvect++ = 0x1E000; /* DSP Idle */ 113 /* clear out the next 10 words as NOP */ 114 memset(resetvect, 0, sizeof(unsigned) *10); 115 116 /* setup the DSP reset vector */ 117 writel(DAVINCI_L3CBARAM_BASE, HOST1CFG); 118 119 dsp_lpsc_on(1, DAVINCI_LPSC_GEM); 120 val = readl(PSC0_MDCTL + (15 * 4)); 121 val |= 0x100; 122 writel(val, (PSC0_MDCTL + (15 * 4))); 123 } 124 125 int misc_init_r(void) 126 { 127 dspwake(); 128 129 #if defined(CONFIG_MAC_ADDR_IN_SPIFLASH) || defined(CONFIG_MAC_ADDR_IN_EEPROM) 130 131 uchar env_enetaddr[6]; 132 int enetaddr_found; 133 134 enetaddr_found = eth_env_get_enetaddr("ethaddr", env_enetaddr); 135 136 #endif 137 138 #ifdef CONFIG_MAC_ADDR_IN_SPIFLASH 139 int spi_mac_read; 140 uchar buff[6]; 141 142 spi_mac_read = get_mac_addr(buff); 143 buff[0] = 0; 144 145 /* 146 * MAC address not present in the environment 147 * try and read the MAC address from SPI flash 148 * and set it. 149 */ 150 if (!enetaddr_found) { 151 if (!spi_mac_read) { 152 if (is_valid_ethaddr(buff)) { 153 if (eth_env_set_enetaddr("ethaddr", buff)) { 154 printf("Warning: Failed to " 155 "set MAC address from SPI flash\n"); 156 } 157 } else { 158 printf("Warning: Invalid " 159 "MAC address read from SPI flash\n"); 160 } 161 } 162 } else { 163 /* 164 * MAC address present in environment compare it with 165 * the MAC address in SPI flash and warn on mismatch 166 */ 167 if (!spi_mac_read && is_valid_ethaddr(buff) && 168 memcmp(env_enetaddr, buff, 6)) 169 printf("Warning: MAC address in SPI flash don't match " 170 "with the MAC address in the environment\n"); 171 printf("Default using MAC address from environment\n"); 172 } 173 174 #elif defined(CONFIG_MAC_ADDR_IN_EEPROM) 175 uint8_t enetaddr[8]; 176 int eeprom_mac_read; 177 178 /* Read Ethernet MAC address from EEPROM */ 179 eeprom_mac_read = dvevm_read_mac_address(enetaddr); 180 181 /* 182 * MAC address not present in the environment 183 * try and read the MAC address from EEPROM flash 184 * and set it. 185 */ 186 if (!enetaddr_found) { 187 if (eeprom_mac_read) 188 /* Set Ethernet MAC address from EEPROM */ 189 davinci_sync_env_enetaddr(enetaddr); 190 } else { 191 /* 192 * MAC address present in environment compare it with 193 * the MAC address in EEPROM and warn on mismatch 194 */ 195 if (eeprom_mac_read && memcmp(enetaddr, env_enetaddr, 6)) 196 printf("Warning: MAC address in EEPROM don't match " 197 "with the MAC address in the environment\n"); 198 printf("Default using MAC address from environment\n"); 199 } 200 201 #endif 202 return 0; 203 } 204 205 #ifdef CONFIG_MMC_DAVINCI 206 static struct davinci_mmc mmc_sd0 = { 207 .reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE, 208 .host_caps = MMC_MODE_4BIT, /* DA850 supports only 4-bit SD/MMC */ 209 .voltages = MMC_VDD_32_33 | MMC_VDD_33_34, 210 .version = MMC_CTLR_VERSION_2, 211 }; 212 213 int board_mmc_init(bd_t *bis) 214 { 215 mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID); 216 217 /* Add slot-0 to mmc subsystem */ 218 return davinci_mmc_init(bis, &mmc_sd0); 219 } 220 #endif 221 222 static const struct pinmux_config gpio_pins[] = { 223 #ifdef CONFIG_USE_NOR 224 /* GP0[11] is required for NOR to work on Rev 3 EVMs */ 225 { pinmux(0), 8, 4 }, /* GP0[11] */ 226 #endif 227 #ifdef CONFIG_MMC_DAVINCI 228 /* GP0[11] is required for SD to work on Rev 3 EVMs */ 229 { pinmux(0), 8, 4 }, /* GP0[11] */ 230 #endif 231 }; 232 233 const struct pinmux_resource pinmuxes[] = { 234 #ifdef CONFIG_DRIVER_TI_EMAC 235 PINMUX_ITEM(emac_pins_mdio), 236 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII 237 PINMUX_ITEM(emac_pins_rmii), 238 #else 239 PINMUX_ITEM(emac_pins_mii), 240 #endif 241 #endif 242 #ifdef CONFIG_SPI_FLASH 243 PINMUX_ITEM(spi1_pins_base), 244 PINMUX_ITEM(spi1_pins_scs0), 245 #endif 246 PINMUX_ITEM(uart2_pins_txrx), 247 PINMUX_ITEM(uart2_pins_rtscts), 248 PINMUX_ITEM(i2c0_pins), 249 #ifdef CONFIG_NAND_DAVINCI 250 PINMUX_ITEM(emifa_pins_cs3), 251 PINMUX_ITEM(emifa_pins_cs4), 252 PINMUX_ITEM(emifa_pins_nand), 253 #elif defined(CONFIG_USE_NOR) 254 PINMUX_ITEM(emifa_pins_cs2), 255 PINMUX_ITEM(emifa_pins_nor), 256 #endif 257 PINMUX_ITEM(gpio_pins), 258 #ifdef CONFIG_MMC_DAVINCI 259 PINMUX_ITEM(mmc0_pins), 260 #endif 261 }; 262 263 const int pinmuxes_size = ARRAY_SIZE(pinmuxes); 264 265 const struct lpsc_resource lpsc[] = { 266 { DAVINCI_LPSC_AEMIF }, /* NAND, NOR */ 267 { DAVINCI_LPSC_SPI1 }, /* Serial Flash */ 268 { DAVINCI_LPSC_EMAC }, /* image download */ 269 { DAVINCI_LPSC_UART2 }, /* console */ 270 { DAVINCI_LPSC_GPIO }, 271 #ifdef CONFIG_MMC_DAVINCI 272 { DAVINCI_LPSC_MMC_SD }, 273 #endif 274 }; 275 276 const int lpsc_size = ARRAY_SIZE(lpsc); 277 278 #ifndef CONFIG_DA850_EVM_MAX_CPU_CLK 279 #define CONFIG_DA850_EVM_MAX_CPU_CLK 300000000 280 #endif 281 282 #define REV_AM18X_EVM 0x100 283 284 /* 285 * get_board_rev() - setup to pass kernel board revision information 286 * Returns: 287 * bit[0-3] Maximum cpu clock rate supported by onboard SoC 288 * 0000b - 300 MHz 289 * 0001b - 372 MHz 290 * 0010b - 408 MHz 291 * 0011b - 456 MHz 292 */ 293 u32 get_board_rev(void) 294 { 295 char *s; 296 u32 maxcpuclk = CONFIG_DA850_EVM_MAX_CPU_CLK; 297 u32 rev = 0; 298 299 s = env_get("maxcpuclk"); 300 if (s) 301 maxcpuclk = simple_strtoul(s, NULL, 10); 302 303 if (maxcpuclk >= 456000000) 304 rev = 3; 305 else if (maxcpuclk >= 408000000) 306 rev = 2; 307 else if (maxcpuclk >= 372000000) 308 rev = 1; 309 #ifdef CONFIG_DA850_AM18X_EVM 310 rev |= REV_AM18X_EVM; 311 #endif 312 return rev; 313 } 314 315 int board_early_init_f(void) 316 { 317 /* 318 * Power on required peripherals 319 * ARM does not have access by default to PSC0 and PSC1 320 * assuming here that the DSP bootloader has set the IOPU 321 * such that PSC access is available to ARM 322 */ 323 if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc))) 324 return 1; 325 326 return 0; 327 } 328 329 int board_init(void) 330 { 331 irq_init(); 332 333 #ifdef CONFIG_NAND_DAVINCI 334 /* 335 * NAND CS setup - cycle counts based on da850evm NAND timings in the 336 * Linux kernel @ 25MHz EMIFA 337 */ 338 writel((DAVINCI_ABCR_WSETUP(2) | 339 DAVINCI_ABCR_WSTROBE(2) | 340 DAVINCI_ABCR_WHOLD(1) | 341 DAVINCI_ABCR_RSETUP(1) | 342 DAVINCI_ABCR_RSTROBE(4) | 343 DAVINCI_ABCR_RHOLD(0) | 344 DAVINCI_ABCR_TA(1) | 345 DAVINCI_ABCR_ASIZE_8BIT), 346 &davinci_emif_regs->ab2cr); /* CS3 */ 347 #endif 348 349 /* arch number of the board */ 350 gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM; 351 352 /* address of boot parameters */ 353 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR; 354 355 /* setup the SUSPSRC for ARM to control emulation suspend */ 356 writel(readl(&davinci_syscfg_regs->suspsrc) & 357 ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C | 358 DAVINCI_SYSCFG_SUSPSRC_SPI1 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 | 359 DAVINCI_SYSCFG_SUSPSRC_UART2), 360 &davinci_syscfg_regs->suspsrc); 361 362 /* configure pinmux settings */ 363 if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes))) 364 return 1; 365 366 #ifdef CONFIG_USE_NOR 367 /* Set the GPIO direction as output */ 368 clrbits_le32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11)); 369 370 /* Set the output as low */ 371 writel(0x01 << 11, GPIO_BANK0_REG_CLR_ADDR); 372 #endif 373 374 #ifdef CONFIG_MMC_DAVINCI 375 /* Set the GPIO direction as output */ 376 clrbits_le32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11)); 377 378 /* Set the output as high */ 379 writel(0x01 << 11, GPIO_BANK0_REG_SET_ADDR); 380 #endif 381 382 #ifdef CONFIG_DRIVER_TI_EMAC 383 davinci_emac_mii_mode_sel(HAS_RMII); 384 #endif /* CONFIG_DRIVER_TI_EMAC */ 385 386 /* enable the console UART */ 387 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST | 388 DAVINCI_UART_PWREMU_MGMT_UTRST), 389 &davinci_uart2_ctrl_regs->pwremu_mgmt); 390 391 return 0; 392 } 393 394 #ifdef CONFIG_DRIVER_TI_EMAC 395 396 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII 397 /** 398 * rmii_hw_init 399 * 400 * DA850/OMAP-L138 EVM can interface to a daughter card for 401 * additional features. This card has an I2C GPIO Expander TCA6416 402 * to select the required functions like camera, RMII Ethernet, 403 * character LCD, video. 404 * 405 * Initialization of the expander involves configuring the 406 * polarity and direction of the ports. P07-P05 are used here. 407 * These ports are connected to a Mux chip which enables only one 408 * functionality at a time. 409 * 410 * For RMII phy to respond, the MII MDIO clock has to be disabled 411 * since both the PHY devices have address as zero. The MII MDIO 412 * clock is controlled via GPIO2[6]. 413 * 414 * This code is valid for Beta version of the hardware 415 */ 416 int rmii_hw_init(void) 417 { 418 const struct pinmux_config gpio_pins[] = { 419 { pinmux(6), 8, 1 } 420 }; 421 u_int8_t buf[2]; 422 unsigned int temp; 423 int ret; 424 425 /* PinMux for GPIO */ 426 if (davinci_configure_pin_mux(gpio_pins, ARRAY_SIZE(gpio_pins)) != 0) 427 return 1; 428 429 /* I2C Exapnder configuration */ 430 /* Set polarity to non-inverted */ 431 buf[0] = 0x0; 432 buf[1] = 0x0; 433 ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 4, 1, buf, 2); 434 if (ret) { 435 printf("\nExpander @ 0x%02x write FAILED!!!\n", 436 CONFIG_SYS_I2C_EXPANDER_ADDR); 437 return ret; 438 } 439 440 /* Configure P07-P05 as outputs */ 441 buf[0] = 0x1f; 442 buf[1] = 0xff; 443 ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 6, 1, buf, 2); 444 if (ret) { 445 printf("\nExpander @ 0x%02x write FAILED!!!\n", 446 CONFIG_SYS_I2C_EXPANDER_ADDR); 447 } 448 449 /* For Ethernet RMII selection 450 * P07(SelA)=0 451 * P06(SelB)=1 452 * P05(SelC)=1 453 */ 454 if (i2c_read(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) { 455 printf("\nExpander @ 0x%02x read FAILED!!!\n", 456 CONFIG_SYS_I2C_EXPANDER_ADDR); 457 } 458 459 buf[0] &= 0x1f; 460 buf[0] |= (0 << 7) | (1 << 6) | (1 << 5); 461 if (i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) { 462 printf("\nExpander @ 0x%02x write FAILED!!!\n", 463 CONFIG_SYS_I2C_EXPANDER_ADDR); 464 } 465 466 /* Set the output as high */ 467 temp = REG(GPIO_BANK2_REG_SET_ADDR); 468 temp |= (0x01 << 6); 469 REG(GPIO_BANK2_REG_SET_ADDR) = temp; 470 471 /* Set the GPIO direction as output */ 472 temp = REG(GPIO_BANK2_REG_DIR_ADDR); 473 temp &= ~(0x01 << 6); 474 REG(GPIO_BANK2_REG_DIR_ADDR) = temp; 475 476 return 0; 477 } 478 #endif /* CONFIG_DRIVER_TI_EMAC_USE_RMII */ 479 480 /* 481 * Initializes on-board ethernet controllers. 482 */ 483 int board_eth_init(bd_t *bis) 484 { 485 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII 486 /* Select RMII fucntion through the expander */ 487 if (rmii_hw_init()) 488 printf("RMII hardware init failed!!!\n"); 489 #endif 490 if (!davinci_emac_initialize()) { 491 printf("Error: Ethernet init failed!\n"); 492 return -1; 493 } 494 495 return 0; 496 } 497 #endif /* CONFIG_DRIVER_TI_EMAC */ 498