1 /* 2 * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <netdev.h> 9 #include <ahci.h> 10 #include <linux/mbus.h> 11 #include <asm/io.h> 12 #include <asm/pl310.h> 13 #include <asm/arch/cpu.h> 14 #include <asm/arch/soc.h> 15 #include <sdhci.h> 16 17 #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) 18 #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) 19 20 static struct mbus_win windows[] = { 21 /* PCIE MEM address space */ 22 { MBUS_PCI_MEM_BASE, MBUS_PCI_MEM_SIZE, 23 CPU_TARGET_PCIE13, CPU_ATTR_PCIE_MEM }, 24 25 /* PCIE IO address space */ 26 { MBUS_PCI_IO_BASE, MBUS_PCI_IO_SIZE, 27 CPU_TARGET_PCIE13, CPU_ATTR_PCIE_IO }, 28 29 /* SPI */ 30 { MBUS_SPI_BASE, MBUS_SPI_SIZE, 31 CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH }, 32 33 /* NOR */ 34 { MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE, 35 CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM }, 36 }; 37 38 void reset_cpu(unsigned long ignored) 39 { 40 struct mvebu_system_registers *reg = 41 (struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE; 42 43 writel(readl(®->rstoutn_mask) | 1, ®->rstoutn_mask); 44 writel(readl(®->sys_soft_rst) | 1, ®->sys_soft_rst); 45 while (1) 46 ; 47 } 48 49 int mvebu_soc_family(void) 50 { 51 u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; 52 53 if (devid == SOC_MV78460_ID) 54 return MVEBU_SOC_AXP; 55 56 if (devid == SOC_88F6810_ID || devid == SOC_88F6820_ID || 57 devid == SOC_88F6828_ID) 58 return MVEBU_SOC_A38X; 59 60 return MVEBU_SOC_UNKNOWN; 61 } 62 63 #if defined(CONFIG_DISPLAY_CPUINFO) 64 int print_cpuinfo(void) 65 { 66 u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; 67 u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff; 68 69 puts("SoC: "); 70 71 switch (devid) { 72 case SOC_MV78460_ID: 73 puts("MV78460-"); 74 break; 75 case SOC_88F6810_ID: 76 puts("MV88F6810-"); 77 break; 78 case SOC_88F6820_ID: 79 puts("MV88F6820-"); 80 break; 81 case SOC_88F6828_ID: 82 puts("MV88F6828-"); 83 break; 84 default: 85 puts("Unknown-"); 86 break; 87 } 88 89 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 90 switch (revid) { 91 case 1: 92 puts("A0\n"); 93 break; 94 case 2: 95 puts("B0\n"); 96 break; 97 default: 98 printf("?? (%x)\n", revid); 99 break; 100 } 101 } 102 103 if (mvebu_soc_family() == MVEBU_SOC_A38X) { 104 switch (revid) { 105 case MV_88F68XX_Z1_ID: 106 puts("Z1\n"); 107 break; 108 case MV_88F68XX_A0_ID: 109 puts("A0\n"); 110 break; 111 default: 112 printf("?? (%x)\n", revid); 113 break; 114 } 115 } 116 117 return 0; 118 } 119 #endif /* CONFIG_DISPLAY_CPUINFO */ 120 121 /* 122 * This function initialize Controller DRAM Fastpath windows. 123 * It takes the CS size information from the 0x1500 scratch registers 124 * and sets the correct windows sizes and base addresses accordingly. 125 * 126 * These values are set in the scratch registers by the Marvell 127 * DDR3 training code, which is executed by the BootROM before the 128 * main payload (U-Boot) is executed. This training code is currently 129 * only available in the Marvell U-Boot version. It needs to be 130 * ported to mainline U-Boot SPL at some point. 131 */ 132 static void update_sdram_window_sizes(void) 133 { 134 u64 base = 0; 135 u32 size, temp; 136 int i; 137 138 for (i = 0; i < SDRAM_MAX_CS; i++) { 139 size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK; 140 if (size != 0) { 141 size |= ~(SDRAM_ADDR_MASK); 142 143 /* Set Base Address */ 144 temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF); 145 writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i)); 146 147 /* 148 * Check if out of max window size and resize 149 * the window 150 */ 151 temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) & 152 ~(SDRAM_ADDR_MASK)) | 1; 153 temp |= (size & SDRAM_ADDR_MASK); 154 writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)); 155 156 base += ((u64)size + 1); 157 } else { 158 /* 159 * Disable window if not used, otherwise this 160 * leads to overlapping enabled windows with 161 * pretty strange results 162 */ 163 clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1); 164 } 165 } 166 } 167 168 void mmu_disable(void) 169 { 170 asm volatile( 171 "mrc p15, 0, r0, c1, c0, 0\n" 172 "bic r0, #1\n" 173 "mcr p15, 0, r0, c1, c0, 0\n"); 174 } 175 176 #ifdef CONFIG_ARCH_CPU_INIT 177 static void set_cbar(u32 addr) 178 { 179 asm("mcr p15, 4, %0, c15, c0" : : "r" (addr)); 180 } 181 182 183 int arch_cpu_init(void) 184 { 185 #ifndef CONFIG_SPL_BUILD 186 if (mvebu_soc_family() == MVEBU_SOC_A38X) { 187 struct pl310_regs *const pl310 = 188 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 189 190 /* 191 * Only with disabled MMU its possible to switch the base 192 * register address on Armada 38x. Without this the SDRAM 193 * located at >= 0x4000.0000 is also not accessible, as its 194 * still locked to cache. 195 * 196 * So to fully release / unlock this area from cache, we need 197 * to first flush all caches, then disable the MMU and 198 * disable the L2 cache. 199 */ 200 icache_disable(); 201 dcache_disable(); 202 mmu_disable(); 203 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); 204 } 205 #endif 206 207 /* Linux expects the internal registers to be at 0xf1000000 */ 208 writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); 209 set_cbar(SOC_REGS_PHY_BASE + 0xC000); 210 211 /* 212 * We need to call mvebu_mbus_probe() before calling 213 * update_sdram_window_sizes() as it disables all previously 214 * configured mbus windows and then configures them as 215 * required for U-Boot. Calling update_sdram_window_sizes() 216 * without this configuration will not work, as the internal 217 * registers can't be accessed reliably because of potenial 218 * double mapping. 219 * After updating the SDRAM access windows we need to call 220 * mvebu_mbus_probe() again, as this now correctly configures 221 * the SDRAM areas that are later used by the MVEBU drivers 222 * (e.g. USB, NETA). 223 */ 224 225 /* 226 * First disable all windows 227 */ 228 mvebu_mbus_probe(NULL, 0); 229 230 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 231 /* 232 * Now the SDRAM access windows can be reconfigured using 233 * the information in the SDRAM scratch pad registers 234 */ 235 update_sdram_window_sizes(); 236 } 237 238 /* 239 * Finally the mbus windows can be configured with the 240 * updated SDRAM sizes 241 */ 242 mvebu_mbus_probe(windows, ARRAY_SIZE(windows)); 243 244 if (mvebu_soc_family() == MVEBU_SOC_AXP) { 245 /* Enable GBE0, GBE1, LCD and NFC PUP */ 246 clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0, 247 GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN | 248 NAND_PUP_EN | SPI_PUP_EN); 249 } 250 251 /* Enable NAND and NAND arbiter */ 252 clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN | NAND_ARBITER_EN); 253 254 /* Disable MBUS error propagation */ 255 clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0); 256 257 return 0; 258 } 259 #endif /* CONFIG_ARCH_CPU_INIT */ 260 261 u32 mvebu_get_nand_clock(void) 262 { 263 return CONFIG_SYS_MVEBU_PLL_CLOCK / 264 ((readl(MVEBU_CORE_DIV_CLK_CTRL(1)) & 265 NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS); 266 } 267 268 /* 269 * SOC specific misc init 270 */ 271 #if defined(CONFIG_ARCH_MISC_INIT) 272 int arch_misc_init(void) 273 { 274 /* Nothing yet, perhaps we need something here later */ 275 return 0; 276 } 277 #endif /* CONFIG_ARCH_MISC_INIT */ 278 279 #ifdef CONFIG_MVNETA 280 int cpu_eth_init(bd_t *bis) 281 { 282 u32 enet_base[] = { MVEBU_EGIGA0_BASE, MVEBU_EGIGA1_BASE, 283 MVEBU_EGIGA2_BASE, MVEBU_EGIGA3_BASE }; 284 u8 phy_addr[] = CONFIG_PHY_ADDR; 285 int i; 286 287 /* 288 * Only Armada XP supports all 4 ethernet interfaces. A38x has 289 * slightly different base addresses for its 2-3 interfaces. 290 */ 291 if (mvebu_soc_family() != MVEBU_SOC_AXP) { 292 enet_base[1] = MVEBU_EGIGA2_BASE; 293 enet_base[2] = MVEBU_EGIGA3_BASE; 294 } 295 296 for (i = 0; i < ARRAY_SIZE(phy_addr); i++) 297 mvneta_initialize(bis, enet_base[i], i, phy_addr[i]); 298 299 return 0; 300 } 301 #endif 302 303 #ifdef CONFIG_MV_SDHCI 304 int board_mmc_init(bd_t *bis) 305 { 306 mv_sdh_init(MVEBU_SDIO_BASE, 0, 0, 307 SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD); 308 309 return 0; 310 } 311 #endif 312 313 #ifdef CONFIG_SCSI_AHCI_PLAT 314 #define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 315 #define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 316 317 #define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) 318 #define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) 319 #define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) 320 321 static void ahci_mvebu_mbus_config(void __iomem *base) 322 { 323 const struct mbus_dram_target_info *dram; 324 int i; 325 326 dram = mvebu_mbus_dram_info(); 327 328 for (i = 0; i < 4; i++) { 329 writel(0, base + AHCI_WINDOW_CTRL(i)); 330 writel(0, base + AHCI_WINDOW_BASE(i)); 331 writel(0, base + AHCI_WINDOW_SIZE(i)); 332 } 333 334 for (i = 0; i < dram->num_cs; i++) { 335 const struct mbus_dram_window *cs = dram->cs + i; 336 337 writel((cs->mbus_attr << 8) | 338 (dram->mbus_dram_target_id << 4) | 1, 339 base + AHCI_WINDOW_CTRL(i)); 340 writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i)); 341 writel(((cs->size - 1) & 0xffff0000), 342 base + AHCI_WINDOW_SIZE(i)); 343 } 344 } 345 346 static void ahci_mvebu_regret_option(void __iomem *base) 347 { 348 /* 349 * Enable the regret bit to allow the SATA unit to regret a 350 * request that didn't receive an acknowlegde and avoid a 351 * deadlock 352 */ 353 writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR); 354 writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA); 355 } 356 357 void scsi_init(void) 358 { 359 printf("MVEBU SATA INIT\n"); 360 ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE); 361 ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE); 362 ahci_init((void __iomem *)MVEBU_SATA0_BASE); 363 } 364 #endif 365 366 #ifndef CONFIG_SYS_DCACHE_OFF 367 void enable_caches(void) 368 { 369 struct pl310_regs *const pl310 = 370 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 371 372 /* First disable L2 cache - may still be enable from BootROM */ 373 if (mvebu_soc_family() == MVEBU_SOC_A38X) 374 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); 375 376 /* Avoid problem with e.g. neta ethernet driver */ 377 invalidate_dcache_all(); 378 379 /* Enable D-cache. I-cache is already enabled in start.S */ 380 dcache_enable(); 381 } 382 #endif 383