1 /* 2 * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <ahci.h> 9 #include <linux/mbus.h> 10 #include <asm/io.h> 11 #include <asm/pl310.h> 12 #include <asm/arch/cpu.h> 13 #include <asm/arch/soc.h> 14 #include <sdhci.h> 15 16 #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) 17 #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) 18 19 static struct mbus_win windows[] = { 20 /* SPI */ 21 { MBUS_SPI_BASE, MBUS_SPI_SIZE, 22 CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH }, 23 24 /* NOR */ 25 { MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE, 26 CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM }, 27 }; 28 29 void lowlevel_init(void) 30 { 31 /* 32 * Dummy implementation, we only need LOWLEVEL_INIT 33 * on Armada to configure CP15 in start.S / cpu_init_cp15() 34 */ 35 } 36 37 void reset_cpu(unsigned long ignored) 38 { 39 struct mvebu_system_registers *reg = 40 (struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE; 41 42 writel(readl(®->rstoutn_mask) | 1, ®->rstoutn_mask); 43 writel(readl(®->sys_soft_rst) | 1, ®->sys_soft_rst); 44 while (1) 45 ; 46 } 47 48 int mvebu_soc_family(void) 49 { 50 u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; 51 52 switch (devid) { 53 case SOC_MV78230_ID: 54 case SOC_MV78260_ID: 55 case SOC_MV78460_ID: 56 return MVEBU_SOC_AXP; 57 58 case SOC_88F6720_ID: 59 return MVEBU_SOC_A375; 60 61 case SOC_88F6810_ID: 62 case SOC_88F6820_ID: 63 case SOC_88F6828_ID: 64 return MVEBU_SOC_A38X; 65 } 66 67 return MVEBU_SOC_UNKNOWN; 68 } 69 70 #if defined(CONFIG_DISPLAY_CPUINFO) 71 72 #if defined(CONFIG_ARMADA_375) 73 /* SAR frequency values for Armada 375 */ 74 static const struct sar_freq_modes sar_freq_tab[] = { 75 { 0, 0x0, 266, 133, 266 }, 76 { 1, 0x0, 333, 167, 167 }, 77 { 2, 0x0, 333, 167, 222 }, 78 { 3, 0x0, 333, 167, 333 }, 79 { 4, 0x0, 400, 200, 200 }, 80 { 5, 0x0, 400, 200, 267 }, 81 { 6, 0x0, 400, 200, 400 }, 82 { 7, 0x0, 500, 250, 250 }, 83 { 8, 0x0, 500, 250, 334 }, 84 { 9, 0x0, 500, 250, 500 }, 85 { 10, 0x0, 533, 267, 267 }, 86 { 11, 0x0, 533, 267, 356 }, 87 { 12, 0x0, 533, 267, 533 }, 88 { 13, 0x0, 600, 300, 300 }, 89 { 14, 0x0, 600, 300, 400 }, 90 { 15, 0x0, 600, 300, 600 }, 91 { 16, 0x0, 666, 333, 333 }, 92 { 17, 0x0, 666, 333, 444 }, 93 { 18, 0x0, 666, 333, 666 }, 94 { 19, 0x0, 800, 400, 267 }, 95 { 20, 0x0, 800, 400, 400 }, 96 { 21, 0x0, 800, 400, 534 }, 97 { 22, 0x0, 900, 450, 300 }, 98 { 23, 0x0, 900, 450, 450 }, 99 { 24, 0x0, 900, 450, 600 }, 100 { 25, 0x0, 1000, 500, 500 }, 101 { 26, 0x0, 1000, 500, 667 }, 102 { 27, 0x0, 1000, 333, 500 }, 103 { 28, 0x0, 400, 400, 400 }, 104 { 29, 0x0, 1100, 550, 550 }, 105 { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ 106 }; 107 #elif defined(CONFIG_ARMADA_38X) 108 /* SAR frequency values for Armada 38x */ 109 static const struct sar_freq_modes sar_freq_tab[] = { 110 { 0x0, 0x0, 666, 333, 333 }, 111 { 0x2, 0x0, 800, 400, 400 }, 112 { 0x4, 0x0, 1066, 533, 533 }, 113 { 0x6, 0x0, 1200, 600, 600 }, 114 { 0x8, 0x0, 1332, 666, 666 }, 115 { 0xc, 0x0, 1600, 800, 800 }, 116 { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ 117 }; 118 #else 119 /* SAR frequency values for Armada XP */ 120 static const struct sar_freq_modes sar_freq_tab[] = { 121 { 0xa, 0x5, 800, 400, 400 }, 122 { 0x1, 0x5, 1066, 533, 533 }, 123 { 0x2, 0x5, 1200, 600, 600 }, 124 { 0x2, 0x9, 1200, 600, 400 }, 125 { 0x3, 0x5, 1333, 667, 667 }, 126 { 0x4, 0x5, 1500, 750, 750 }, 127 { 0x4, 0x9, 1500, 750, 500 }, 128 { 0xb, 0x9, 1600, 800, 533 }, 129 { 0xb, 0xa, 1600, 800, 640 }, 130 { 0xb, 0x5, 1600, 800, 800 }, 131 { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ 132 }; 133 #endif 134 135 void get_sar_freq(struct sar_freq_modes *sar_freq) 136 { 137 u32 val; 138 u32 freq; 139 int i; 140 141 #if defined(CONFIG_ARMADA_375) 142 val = readl(CONFIG_SAR2_REG); /* SAR - Sample At Reset */ 143 #else 144 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 145 #endif 146 freq = (val & SAR_CPU_FREQ_MASK) >> SAR_CPU_FREQ_OFFS; 147 #if defined(SAR2_CPU_FREQ_MASK) 148 /* 149 * Shift CPU0 clock frequency select bit from SAR2 register 150 * into correct position 151 */ 152 freq |= ((readl(CONFIG_SAR2_REG) & SAR2_CPU_FREQ_MASK) 153 >> SAR2_CPU_FREQ_OFFS) << 3; 154 #endif 155 for (i = 0; sar_freq_tab[i].val != 0xff; i++) { 156 if (sar_freq_tab[i].val == freq) { 157 #if defined(CONFIG_ARMADA_375) || defined(CONFIG_ARMADA_38X) 158 *sar_freq = sar_freq_tab[i]; 159 return; 160 #else 161 int k; 162 u8 ffc; 163 164 ffc = (val & SAR_FFC_FREQ_MASK) >> 165 SAR_FFC_FREQ_OFFS; 166 for (k = i; sar_freq_tab[k].ffc != 0xff; k++) { 167 if (sar_freq_tab[k].ffc == ffc) { 168 *sar_freq = sar_freq_tab[k]; 169 return; 170 } 171 } 172 i = k; 173 #endif 174 } 175 } 176 177 /* SAR value not found, return 0 for frequencies */ 178 *sar_freq = sar_freq_tab[i - 1]; 179 } 180 181 int print_cpuinfo(void) 182 { 183 u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; 184 u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff; 185 struct sar_freq_modes sar_freq; 186 187 puts("SoC: "); 188 189 switch (devid) { 190 case SOC_MV78230_ID: 191 puts("MV78230-"); 192 break; 193 case SOC_MV78260_ID: 194 puts("MV78260-"); 195 break; 196 case SOC_MV78460_ID: 197 puts("MV78460-"); 198 break; 199 case SOC_88F6720_ID: 200 puts("MV88F6720-"); 201 break; 202 case SOC_88F6810_ID: 203 puts("MV88F6810-"); 204 break; 205 case SOC_88F6820_ID: 206 puts("MV88F6820-"); 207 break; 208 case SOC_88F6828_ID: 209 puts("MV88F6828-"); 210 break; 211 default: 212 puts("Unknown-"); 213 break; 214 } 215 216 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 217 switch (revid) { 218 case 1: 219 puts("A0"); 220 break; 221 case 2: 222 puts("B0"); 223 break; 224 default: 225 printf("?? (%x)", revid); 226 break; 227 } 228 } 229 230 if (mvebu_soc_family() == MVEBU_SOC_A375) { 231 switch (revid) { 232 case MV_88F67XX_A0_ID: 233 puts("A0"); 234 break; 235 default: 236 printf("?? (%x)", revid); 237 break; 238 } 239 } 240 241 if (mvebu_soc_family() == MVEBU_SOC_A38X) { 242 switch (revid) { 243 case MV_88F68XX_Z1_ID: 244 puts("Z1"); 245 break; 246 case MV_88F68XX_A0_ID: 247 puts("A0"); 248 break; 249 default: 250 printf("?? (%x)", revid); 251 break; 252 } 253 } 254 255 get_sar_freq(&sar_freq); 256 printf(" at %d MHz\n", sar_freq.p_clk); 257 258 return 0; 259 } 260 #endif /* CONFIG_DISPLAY_CPUINFO */ 261 262 /* 263 * This function initialize Controller DRAM Fastpath windows. 264 * It takes the CS size information from the 0x1500 scratch registers 265 * and sets the correct windows sizes and base addresses accordingly. 266 * 267 * These values are set in the scratch registers by the Marvell 268 * DDR3 training code, which is executed by the BootROM before the 269 * main payload (U-Boot) is executed. This training code is currently 270 * only available in the Marvell U-Boot version. It needs to be 271 * ported to mainline U-Boot SPL at some point. 272 */ 273 static void update_sdram_window_sizes(void) 274 { 275 u64 base = 0; 276 u32 size, temp; 277 int i; 278 279 for (i = 0; i < SDRAM_MAX_CS; i++) { 280 size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK; 281 if (size != 0) { 282 size |= ~(SDRAM_ADDR_MASK); 283 284 /* Set Base Address */ 285 temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF); 286 writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i)); 287 288 /* 289 * Check if out of max window size and resize 290 * the window 291 */ 292 temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) & 293 ~(SDRAM_ADDR_MASK)) | 1; 294 temp |= (size & SDRAM_ADDR_MASK); 295 writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)); 296 297 base += ((u64)size + 1); 298 } else { 299 /* 300 * Disable window if not used, otherwise this 301 * leads to overlapping enabled windows with 302 * pretty strange results 303 */ 304 clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1); 305 } 306 } 307 } 308 309 void mmu_disable(void) 310 { 311 asm volatile( 312 "mrc p15, 0, r0, c1, c0, 0\n" 313 "bic r0, #1\n" 314 "mcr p15, 0, r0, c1, c0, 0\n"); 315 } 316 317 #ifdef CONFIG_ARCH_CPU_INIT 318 static void set_cbar(u32 addr) 319 { 320 asm("mcr p15, 4, %0, c15, c0" : : "r" (addr)); 321 } 322 323 #define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800) 324 #define MV_USB_PHY_PLL_REG(reg) (MV_USB_PHY_BASE | (((reg) & 0xF) << 2)) 325 #define MV_USB_X3_BASE(addr) (MVEBU_AXP_USB_BASE | BIT(11) | \ 326 (((addr) & 0xF) << 6)) 327 #define MV_USB_X3_PHY_CHANNEL(dev, reg) (MV_USB_X3_BASE((dev) + 1) | \ 328 (((reg) & 0xF) << 2)) 329 330 static void setup_usb_phys(void) 331 { 332 int dev; 333 334 /* 335 * USB PLL init 336 */ 337 338 /* Setup PLL frequency */ 339 /* USB REF frequency = 25 MHz */ 340 clrsetbits_le32(MV_USB_PHY_PLL_REG(1), 0x3ff, 0x605); 341 342 /* Power up PLL and PHY channel */ 343 setbits_le32(MV_USB_PHY_PLL_REG(2), BIT(9)); 344 345 /* Assert VCOCAL_START */ 346 setbits_le32(MV_USB_PHY_PLL_REG(1), BIT(21)); 347 348 mdelay(1); 349 350 /* 351 * USB PHY init (change from defaults) specific for 40nm (78X30 78X60) 352 */ 353 354 for (dev = 0; dev < 3; dev++) { 355 setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 3), BIT(15)); 356 357 /* Assert REG_RCAL_START in channel REG 1 */ 358 setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12)); 359 udelay(40); 360 clrbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12)); 361 } 362 } 363 364 /* 365 * This function is not called from the SPL U-Boot version 366 */ 367 int arch_cpu_init(void) 368 { 369 struct pl310_regs *const pl310 = 370 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 371 372 /* 373 * Only with disabled MMU its possible to switch the base 374 * register address on Armada 38x. Without this the SDRAM 375 * located at >= 0x4000.0000 is also not accessible, as its 376 * still locked to cache. 377 */ 378 mmu_disable(); 379 380 /* Linux expects the internal registers to be at 0xf1000000 */ 381 writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); 382 set_cbar(SOC_REGS_PHY_BASE + 0xC000); 383 384 /* 385 * From this stage on, the SoC detection is working. As we have 386 * configured the internal register base to the value used 387 * in the macros / defines in the U-Boot header (soc.h). 388 */ 389 390 if (mvebu_soc_family() == MVEBU_SOC_A38X) { 391 /* 392 * To fully release / unlock this area from cache, we need 393 * to flush all caches and disable the L2 cache. 394 */ 395 icache_disable(); 396 dcache_disable(); 397 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); 398 } 399 400 /* 401 * We need to call mvebu_mbus_probe() before calling 402 * update_sdram_window_sizes() as it disables all previously 403 * configured mbus windows and then configures them as 404 * required for U-Boot. Calling update_sdram_window_sizes() 405 * without this configuration will not work, as the internal 406 * registers can't be accessed reliably because of potenial 407 * double mapping. 408 * After updating the SDRAM access windows we need to call 409 * mvebu_mbus_probe() again, as this now correctly configures 410 * the SDRAM areas that are later used by the MVEBU drivers 411 * (e.g. USB, NETA). 412 */ 413 414 /* 415 * First disable all windows 416 */ 417 mvebu_mbus_probe(NULL, 0); 418 419 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 420 /* 421 * Now the SDRAM access windows can be reconfigured using 422 * the information in the SDRAM scratch pad registers 423 */ 424 update_sdram_window_sizes(); 425 } 426 427 /* 428 * Finally the mbus windows can be configured with the 429 * updated SDRAM sizes 430 */ 431 mvebu_mbus_probe(windows, ARRAY_SIZE(windows)); 432 433 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 434 /* Enable GBE0, GBE1, LCD and NFC PUP */ 435 clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0, 436 GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN | 437 NAND_PUP_EN | SPI_PUP_EN); 438 439 /* Configure USB PLL and PHYs on AXP */ 440 setup_usb_phys(); 441 } 442 443 /* Enable NAND and NAND arbiter */ 444 clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN | NAND_ARBITER_EN); 445 446 /* Disable MBUS error propagation */ 447 clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0); 448 449 return 0; 450 } 451 #endif /* CONFIG_ARCH_CPU_INIT */ 452 453 u32 mvebu_get_nand_clock(void) 454 { 455 return CONFIG_SYS_MVEBU_PLL_CLOCK / 456 ((readl(MVEBU_CORE_DIV_CLK_CTRL(1)) & 457 NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS); 458 } 459 460 /* 461 * SOC specific misc init 462 */ 463 #if defined(CONFIG_ARCH_MISC_INIT) 464 int arch_misc_init(void) 465 { 466 /* Nothing yet, perhaps we need something here later */ 467 return 0; 468 } 469 #endif /* CONFIG_ARCH_MISC_INIT */ 470 471 #ifdef CONFIG_MV_SDHCI 472 int board_mmc_init(bd_t *bis) 473 { 474 mv_sdh_init(MVEBU_SDIO_BASE, 0, 0, 475 SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD); 476 477 return 0; 478 } 479 #endif 480 481 #ifdef CONFIG_SCSI_AHCI_PLAT 482 #define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 483 #define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 484 485 #define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) 486 #define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) 487 #define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) 488 489 static void ahci_mvebu_mbus_config(void __iomem *base) 490 { 491 const struct mbus_dram_target_info *dram; 492 int i; 493 494 dram = mvebu_mbus_dram_info(); 495 496 for (i = 0; i < 4; i++) { 497 writel(0, base + AHCI_WINDOW_CTRL(i)); 498 writel(0, base + AHCI_WINDOW_BASE(i)); 499 writel(0, base + AHCI_WINDOW_SIZE(i)); 500 } 501 502 for (i = 0; i < dram->num_cs; i++) { 503 const struct mbus_dram_window *cs = dram->cs + i; 504 505 writel((cs->mbus_attr << 8) | 506 (dram->mbus_dram_target_id << 4) | 1, 507 base + AHCI_WINDOW_CTRL(i)); 508 writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i)); 509 writel(((cs->size - 1) & 0xffff0000), 510 base + AHCI_WINDOW_SIZE(i)); 511 } 512 } 513 514 static void ahci_mvebu_regret_option(void __iomem *base) 515 { 516 /* 517 * Enable the regret bit to allow the SATA unit to regret a 518 * request that didn't receive an acknowlegde and avoid a 519 * deadlock 520 */ 521 writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR); 522 writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA); 523 } 524 525 void scsi_init(void) 526 { 527 printf("MVEBU SATA INIT\n"); 528 ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE); 529 ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE); 530 ahci_init((void __iomem *)MVEBU_SATA0_BASE); 531 } 532 #endif 533 534 void enable_caches(void) 535 { 536 /* Avoid problem with e.g. neta ethernet driver */ 537 invalidate_dcache_all(); 538 539 /* 540 * Armada 375 still has some problems with d-cache enabled in the 541 * ethernet driver (mvpp2). So lets keep the d-cache disabled 542 * until this is solved. 543 */ 544 if (mvebu_soc_family() != MVEBU_SOC_A375) { 545 /* Enable D-cache. I-cache is already enabled in start.S */ 546 dcache_enable(); 547 } 548 } 549 550 void v7_outer_cache_enable(void) 551 { 552 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 553 struct pl310_regs *const pl310 = 554 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 555 u32 u; 556 557 /* The L2 cache is already disabled at this point */ 558 559 /* 560 * For Aurora cache in no outer mode, enable via the CP15 561 * coprocessor broadcasting of cache commands to L2. 562 */ 563 asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u)); 564 u |= BIT(8); /* Set the FW bit */ 565 asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u)); 566 567 isb(); 568 569 /* Enable the L2 cache */ 570 setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); 571 } 572 } 573 574 void v7_outer_cache_disable(void) 575 { 576 struct pl310_regs *const pl310 = 577 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 578 579 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); 580 } 581