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