1 /* 2 * Copyright (C) Freescale Semiconductor, Inc. 2006. 3 * Author: Jason Jin<Jason.jin@freescale.com> 4 * Zhang Wei<wei.zhang@freescale.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 * 8 * with the reference on libata and ahci drvier in kernel 9 * 10 * This driver provides a SCSI interface to SATA. 11 */ 12 #include <common.h> 13 14 #include <command.h> 15 #include <dm.h> 16 #include <pci.h> 17 #include <asm/processor.h> 18 #include <linux/errno.h> 19 #include <asm/io.h> 20 #include <malloc.h> 21 #include <memalign.h> 22 #include <pci.h> 23 #include <scsi.h> 24 #include <libata.h> 25 #include <linux/ctype.h> 26 #include <ahci.h> 27 #include <dm/device-internal.h> 28 #include <dm/lists.h> 29 30 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port); 31 32 #ifndef CONFIG_DM_SCSI 33 struct ahci_uc_priv *probe_ent = NULL; 34 #endif 35 36 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0) 37 38 /* 39 * Some controllers limit number of blocks they can read/write at once. 40 * Contemporary SSD devices work much faster if the read/write size is aligned 41 * to a power of 2. Let's set default to 128 and allowing to be overwritten if 42 * needed. 43 */ 44 #ifndef MAX_SATA_BLOCKS_READ_WRITE 45 #define MAX_SATA_BLOCKS_READ_WRITE 0x80 46 #endif 47 48 /* Maximum timeouts for each event */ 49 #define WAIT_MS_SPINUP 20000 50 #define WAIT_MS_DATAIO 10000 51 #define WAIT_MS_FLUSH 5000 52 #define WAIT_MS_LINKUP 200 53 54 __weak void __iomem *ahci_port_base(void __iomem *base, u32 port) 55 { 56 return base + 0x100 + (port * 0x80); 57 } 58 59 60 static void ahci_setup_port(struct ahci_ioports *port, void __iomem *base, 61 unsigned int port_idx) 62 { 63 base = ahci_port_base(base, port_idx); 64 65 port->cmd_addr = base; 66 port->scr_addr = base + PORT_SCR; 67 } 68 69 70 #define msleep(a) udelay(a * 1000) 71 72 static void ahci_dcache_flush_range(unsigned long begin, unsigned long len) 73 { 74 const unsigned long start = begin; 75 const unsigned long end = start + len; 76 77 debug("%s: flush dcache: [%#lx, %#lx)\n", __func__, start, end); 78 flush_dcache_range(start, end); 79 } 80 81 /* 82 * SATA controller DMAs to physical RAM. Ensure data from the 83 * controller is invalidated from dcache; next access comes from 84 * physical RAM. 85 */ 86 static void ahci_dcache_invalidate_range(unsigned long begin, unsigned long len) 87 { 88 const unsigned long start = begin; 89 const unsigned long end = start + len; 90 91 debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__, start, end); 92 invalidate_dcache_range(start, end); 93 } 94 95 /* 96 * Ensure data for SATA controller is flushed out of dcache and 97 * written to physical memory. 98 */ 99 static void ahci_dcache_flush_sata_cmd(struct ahci_ioports *pp) 100 { 101 ahci_dcache_flush_range((unsigned long)pp->cmd_slot, 102 AHCI_PORT_PRIV_DMA_SZ); 103 } 104 105 static int waiting_for_cmd_completed(void __iomem *offset, 106 int timeout_msec, 107 u32 sign) 108 { 109 int i; 110 u32 status; 111 112 for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++) 113 msleep(1); 114 115 return (i < timeout_msec) ? 0 : -1; 116 } 117 118 int __weak ahci_link_up(struct ahci_uc_priv *uc_priv, u8 port) 119 { 120 u32 tmp; 121 int j = 0; 122 void __iomem *port_mmio = uc_priv->port[port].port_mmio; 123 124 /* 125 * Bring up SATA link. 126 * SATA link bringup time is usually less than 1 ms; only very 127 * rarely has it taken between 1-2 ms. Never seen it above 2 ms. 128 */ 129 while (j < WAIT_MS_LINKUP) { 130 tmp = readl(port_mmio + PORT_SCR_STAT); 131 tmp &= PORT_SCR_STAT_DET_MASK; 132 if (tmp == PORT_SCR_STAT_DET_PHYRDY) 133 return 0; 134 udelay(1000); 135 j++; 136 } 137 return 1; 138 } 139 140 #ifdef CONFIG_SUNXI_AHCI 141 /* The sunxi AHCI controller requires this undocumented setup */ 142 static void sunxi_dma_init(void __iomem *port_mmio) 143 { 144 clrsetbits_le32(port_mmio + PORT_P0DMACR, 0x0000ff00, 0x00004400); 145 } 146 #endif 147 148 int ahci_reset(void __iomem *base) 149 { 150 int i = 1000; 151 u32 __iomem *host_ctl_reg = base + HOST_CTL; 152 u32 tmp = readl(host_ctl_reg); /* global controller reset */ 153 154 if ((tmp & HOST_RESET) == 0) 155 writel_with_flush(tmp | HOST_RESET, host_ctl_reg); 156 157 /* 158 * reset must complete within 1 second, or 159 * the hardware should be considered fried. 160 */ 161 do { 162 udelay(1000); 163 tmp = readl(host_ctl_reg); 164 i--; 165 } while ((i > 0) && (tmp & HOST_RESET)); 166 167 if (i == 0) { 168 printf("controller reset failed (0x%x)\n", tmp); 169 return -1; 170 } 171 172 return 0; 173 } 174 175 static int ahci_host_init(struct ahci_uc_priv *uc_priv) 176 { 177 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI) 178 # ifdef CONFIG_DM_PCI 179 struct udevice *dev = uc_priv->dev; 180 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 181 # else 182 pci_dev_t pdev = uc_priv->dev; 183 unsigned short vendor; 184 # endif 185 u16 tmp16; 186 #endif 187 void __iomem *mmio = uc_priv->mmio_base; 188 u32 tmp, cap_save, cmd; 189 int i, j, ret; 190 void __iomem *port_mmio; 191 u32 port_map; 192 193 debug("ahci_host_init: start\n"); 194 195 cap_save = readl(mmio + HOST_CAP); 196 cap_save &= ((1 << 28) | (1 << 17)); 197 cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */ 198 199 ret = ahci_reset(uc_priv->mmio_base); 200 if (ret) 201 return ret; 202 203 writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL); 204 writel(cap_save, mmio + HOST_CAP); 205 writel_with_flush(0xf, mmio + HOST_PORTS_IMPL); 206 207 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI) 208 # ifdef CONFIG_DM_PCI 209 if (pplat->vendor == PCI_VENDOR_ID_INTEL) { 210 u16 tmp16; 211 212 dm_pci_read_config16(dev, 0x92, &tmp16); 213 dm_pci_write_config16(dev, 0x92, tmp16 | 0xf); 214 } 215 # else 216 pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor); 217 218 if (vendor == PCI_VENDOR_ID_INTEL) { 219 u16 tmp16; 220 pci_read_config_word(pdev, 0x92, &tmp16); 221 tmp16 |= 0xf; 222 pci_write_config_word(pdev, 0x92, tmp16); 223 } 224 # endif 225 #endif 226 uc_priv->cap = readl(mmio + HOST_CAP); 227 uc_priv->port_map = readl(mmio + HOST_PORTS_IMPL); 228 port_map = uc_priv->port_map; 229 uc_priv->n_ports = (uc_priv->cap & 0x1f) + 1; 230 231 debug("cap 0x%x port_map 0x%x n_ports %d\n", 232 uc_priv->cap, uc_priv->port_map, uc_priv->n_ports); 233 234 if (uc_priv->n_ports > CONFIG_SYS_SCSI_MAX_SCSI_ID) 235 uc_priv->n_ports = CONFIG_SYS_SCSI_MAX_SCSI_ID; 236 237 for (i = 0; i < uc_priv->n_ports; i++) { 238 if (!(port_map & (1 << i))) 239 continue; 240 uc_priv->port[i].port_mmio = ahci_port_base(mmio, i); 241 port_mmio = (u8 *)uc_priv->port[i].port_mmio; 242 ahci_setup_port(&uc_priv->port[i], mmio, i); 243 244 /* make sure port is not active */ 245 tmp = readl(port_mmio + PORT_CMD); 246 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | 247 PORT_CMD_FIS_RX | PORT_CMD_START)) { 248 debug("Port %d is active. Deactivating.\n", i); 249 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | 250 PORT_CMD_FIS_RX | PORT_CMD_START); 251 writel_with_flush(tmp, port_mmio + PORT_CMD); 252 253 /* spec says 500 msecs for each bit, so 254 * this is slightly incorrect. 255 */ 256 msleep(500); 257 } 258 259 #ifdef CONFIG_SUNXI_AHCI 260 sunxi_dma_init(port_mmio); 261 #endif 262 263 /* Add the spinup command to whatever mode bits may 264 * already be on in the command register. 265 */ 266 cmd = readl(port_mmio + PORT_CMD); 267 cmd |= PORT_CMD_SPIN_UP; 268 writel_with_flush(cmd, port_mmio + PORT_CMD); 269 270 /* Bring up SATA link. */ 271 ret = ahci_link_up(uc_priv, i); 272 if (ret) { 273 printf("SATA link %d timeout.\n", i); 274 continue; 275 } else { 276 debug("SATA link ok.\n"); 277 } 278 279 /* Clear error status */ 280 tmp = readl(port_mmio + PORT_SCR_ERR); 281 if (tmp) 282 writel(tmp, port_mmio + PORT_SCR_ERR); 283 284 debug("Spinning up device on SATA port %d... ", i); 285 286 j = 0; 287 while (j < WAIT_MS_SPINUP) { 288 tmp = readl(port_mmio + PORT_TFDATA); 289 if (!(tmp & (ATA_BUSY | ATA_DRQ))) 290 break; 291 udelay(1000); 292 tmp = readl(port_mmio + PORT_SCR_STAT); 293 tmp &= PORT_SCR_STAT_DET_MASK; 294 if (tmp == PORT_SCR_STAT_DET_PHYRDY) 295 break; 296 j++; 297 } 298 299 tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK; 300 if (tmp == PORT_SCR_STAT_DET_COMINIT) { 301 debug("SATA link %d down (COMINIT received), retrying...\n", i); 302 i--; 303 continue; 304 } 305 306 printf("Target spinup took %d ms.\n", j); 307 if (j == WAIT_MS_SPINUP) 308 debug("timeout.\n"); 309 else 310 debug("ok.\n"); 311 312 tmp = readl(port_mmio + PORT_SCR_ERR); 313 debug("PORT_SCR_ERR 0x%x\n", tmp); 314 writel(tmp, port_mmio + PORT_SCR_ERR); 315 316 /* ack any pending irq events for this port */ 317 tmp = readl(port_mmio + PORT_IRQ_STAT); 318 debug("PORT_IRQ_STAT 0x%x\n", tmp); 319 if (tmp) 320 writel(tmp, port_mmio + PORT_IRQ_STAT); 321 322 writel(1 << i, mmio + HOST_IRQ_STAT); 323 324 /* register linkup ports */ 325 tmp = readl(port_mmio + PORT_SCR_STAT); 326 debug("SATA port %d status: 0x%x\n", i, tmp); 327 if ((tmp & PORT_SCR_STAT_DET_MASK) == PORT_SCR_STAT_DET_PHYRDY) 328 uc_priv->link_port_map |= (0x01 << i); 329 } 330 331 tmp = readl(mmio + HOST_CTL); 332 debug("HOST_CTL 0x%x\n", tmp); 333 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); 334 tmp = readl(mmio + HOST_CTL); 335 debug("HOST_CTL 0x%x\n", tmp); 336 #if !defined(CONFIG_DM_SCSI) 337 #ifndef CONFIG_SCSI_AHCI_PLAT 338 # ifdef CONFIG_DM_PCI 339 dm_pci_read_config16(dev, PCI_COMMAND, &tmp16); 340 tmp |= PCI_COMMAND_MASTER; 341 dm_pci_write_config16(dev, PCI_COMMAND, tmp16); 342 # else 343 pci_read_config_word(pdev, PCI_COMMAND, &tmp16); 344 tmp |= PCI_COMMAND_MASTER; 345 pci_write_config_word(pdev, PCI_COMMAND, tmp16); 346 # endif 347 #endif 348 #endif 349 return 0; 350 } 351 352 353 static void ahci_print_info(struct ahci_uc_priv *uc_priv) 354 { 355 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI) 356 # if defined(CONFIG_DM_PCI) 357 struct udevice *dev = uc_priv->dev; 358 # else 359 pci_dev_t pdev = uc_priv->dev; 360 # endif 361 u16 cc; 362 #endif 363 void __iomem *mmio = uc_priv->mmio_base; 364 u32 vers, cap, cap2, impl, speed; 365 const char *speed_s; 366 const char *scc_s; 367 368 vers = readl(mmio + HOST_VERSION); 369 cap = uc_priv->cap; 370 cap2 = readl(mmio + HOST_CAP2); 371 impl = uc_priv->port_map; 372 373 speed = (cap >> 20) & 0xf; 374 if (speed == 1) 375 speed_s = "1.5"; 376 else if (speed == 2) 377 speed_s = "3"; 378 else if (speed == 3) 379 speed_s = "6"; 380 else 381 speed_s = "?"; 382 383 #if defined(CONFIG_SCSI_AHCI_PLAT) || defined(CONFIG_DM_SCSI) 384 scc_s = "SATA"; 385 #else 386 # ifdef CONFIG_DM_PCI 387 dm_pci_read_config16(dev, 0x0a, &cc); 388 # else 389 pci_read_config_word(pdev, 0x0a, &cc); 390 # endif 391 if (cc == 0x0101) 392 scc_s = "IDE"; 393 else if (cc == 0x0106) 394 scc_s = "SATA"; 395 else if (cc == 0x0104) 396 scc_s = "RAID"; 397 else 398 scc_s = "unknown"; 399 #endif 400 printf("AHCI %02x%02x.%02x%02x " 401 "%u slots %u ports %s Gbps 0x%x impl %s mode\n", 402 (vers >> 24) & 0xff, 403 (vers >> 16) & 0xff, 404 (vers >> 8) & 0xff, 405 vers & 0xff, 406 ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s); 407 408 printf("flags: " 409 "%s%s%s%s%s%s%s" 410 "%s%s%s%s%s%s%s" 411 "%s%s%s%s%s%s\n", 412 cap & (1 << 31) ? "64bit " : "", 413 cap & (1 << 30) ? "ncq " : "", 414 cap & (1 << 28) ? "ilck " : "", 415 cap & (1 << 27) ? "stag " : "", 416 cap & (1 << 26) ? "pm " : "", 417 cap & (1 << 25) ? "led " : "", 418 cap & (1 << 24) ? "clo " : "", 419 cap & (1 << 19) ? "nz " : "", 420 cap & (1 << 18) ? "only " : "", 421 cap & (1 << 17) ? "pmp " : "", 422 cap & (1 << 16) ? "fbss " : "", 423 cap & (1 << 15) ? "pio " : "", 424 cap & (1 << 14) ? "slum " : "", 425 cap & (1 << 13) ? "part " : "", 426 cap & (1 << 7) ? "ccc " : "", 427 cap & (1 << 6) ? "ems " : "", 428 cap & (1 << 5) ? "sxs " : "", 429 cap2 & (1 << 2) ? "apst " : "", 430 cap2 & (1 << 1) ? "nvmp " : "", 431 cap2 & (1 << 0) ? "boh " : ""); 432 } 433 434 #if defined(CONFIG_DM_SCSI) || !defined(CONFIG_SCSI_AHCI_PLAT) 435 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI) 436 static int ahci_init_one(struct ahci_uc_priv *uc_priv, struct udevice *dev) 437 # else 438 static int ahci_init_one(struct ahci_uc_priv *uc_priv, pci_dev_t dev) 439 # endif 440 { 441 #if !defined(CONFIG_DM_SCSI) 442 u16 vendor; 443 #endif 444 int rc; 445 446 uc_priv->dev = dev; 447 448 uc_priv->host_flags = ATA_FLAG_SATA 449 | ATA_FLAG_NO_LEGACY 450 | ATA_FLAG_MMIO 451 | ATA_FLAG_PIO_DMA 452 | ATA_FLAG_NO_ATAPI; 453 uc_priv->pio_mask = 0x1f; 454 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */ 455 456 #if !defined(CONFIG_DM_SCSI) 457 #ifdef CONFIG_DM_PCI 458 uc_priv->mmio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_5, 459 PCI_REGION_MEM); 460 461 /* Take from kernel: 462 * JMicron-specific fixup: 463 * make sure we're in AHCI mode 464 */ 465 dm_pci_read_config16(dev, PCI_VENDOR_ID, &vendor); 466 if (vendor == 0x197b) 467 dm_pci_write_config8(dev, 0x41, 0xa1); 468 #else 469 uc_priv->mmio_base = pci_map_bar(dev, PCI_BASE_ADDRESS_5, 470 PCI_REGION_MEM); 471 472 /* Take from kernel: 473 * JMicron-specific fixup: 474 * make sure we're in AHCI mode 475 */ 476 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor); 477 if (vendor == 0x197b) 478 pci_write_config_byte(dev, 0x41, 0xa1); 479 #endif 480 #else 481 struct scsi_platdata *plat = dev_get_uclass_platdata(dev); 482 uc_priv->mmio_base = (void *)plat->base; 483 #endif 484 485 debug("ahci mmio_base=0x%p\n", uc_priv->mmio_base); 486 /* initialize adapter */ 487 rc = ahci_host_init(uc_priv); 488 if (rc) 489 goto err_out; 490 491 ahci_print_info(uc_priv); 492 493 return 0; 494 495 err_out: 496 return rc; 497 } 498 #endif 499 500 #define MAX_DATA_BYTE_COUNT (4*1024*1024) 501 502 static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port, 503 unsigned char *buf, int buf_len) 504 { 505 struct ahci_ioports *pp = &(uc_priv->port[port]); 506 struct ahci_sg *ahci_sg = pp->cmd_tbl_sg; 507 u32 sg_count; 508 int i; 509 510 sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1; 511 if (sg_count > AHCI_MAX_SG) { 512 printf("Error:Too much sg!\n"); 513 return -1; 514 } 515 516 for (i = 0; i < sg_count; i++) { 517 ahci_sg->addr = 518 cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT); 519 ahci_sg->addr_hi = 0; 520 ahci_sg->flags_size = cpu_to_le32(0x3fffff & 521 (buf_len < MAX_DATA_BYTE_COUNT 522 ? (buf_len - 1) 523 : (MAX_DATA_BYTE_COUNT - 1))); 524 ahci_sg++; 525 buf_len -= MAX_DATA_BYTE_COUNT; 526 } 527 528 return sg_count; 529 } 530 531 532 static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts) 533 { 534 pp->cmd_slot->opts = cpu_to_le32(opts); 535 pp->cmd_slot->status = 0; 536 pp->cmd_slot->tbl_addr = cpu_to_le32((u32)pp->cmd_tbl & 0xffffffff); 537 #ifdef CONFIG_PHYS_64BIT 538 pp->cmd_slot->tbl_addr_hi = 539 cpu_to_le32((u32)(((pp->cmd_tbl) >> 16) >> 16)); 540 #endif 541 } 542 543 static int wait_spinup(void __iomem *port_mmio) 544 { 545 ulong start; 546 u32 tf_data; 547 548 start = get_timer(0); 549 do { 550 tf_data = readl(port_mmio + PORT_TFDATA); 551 if (!(tf_data & ATA_BUSY)) 552 return 0; 553 } while (get_timer(start) < WAIT_MS_SPINUP); 554 555 return -ETIMEDOUT; 556 } 557 558 static int ahci_port_start(struct ahci_uc_priv *uc_priv, u8 port) 559 { 560 struct ahci_ioports *pp = &(uc_priv->port[port]); 561 void __iomem *port_mmio = pp->port_mmio; 562 u32 port_status; 563 void __iomem *mem; 564 565 debug("Enter start port: %d\n", port); 566 port_status = readl(port_mmio + PORT_SCR_STAT); 567 debug("Port %d status: %x\n", port, port_status); 568 if ((port_status & 0xf) != 0x03) { 569 printf("No Link on this port!\n"); 570 return -1; 571 } 572 573 mem = malloc(AHCI_PORT_PRIV_DMA_SZ + 2048); 574 if (!mem) { 575 free(pp); 576 printf("%s: No mem for table!\n", __func__); 577 return -ENOMEM; 578 } 579 580 /* Aligned to 2048-bytes */ 581 mem = memalign(2048, AHCI_PORT_PRIV_DMA_SZ); 582 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ); 583 584 /* 585 * First item in chunk of DMA memory: 32-slot command table, 586 * 32 bytes each in size 587 */ 588 pp->cmd_slot = 589 (struct ahci_cmd_hdr *)(uintptr_t)virt_to_phys((void *)mem); 590 debug("cmd_slot = %p\n", pp->cmd_slot); 591 mem += (AHCI_CMD_SLOT_SZ + 224); 592 593 /* 594 * Second item: Received-FIS area 595 */ 596 pp->rx_fis = virt_to_phys((void *)mem); 597 mem += AHCI_RX_FIS_SZ; 598 599 /* 600 * Third item: data area for storing a single command 601 * and its scatter-gather table 602 */ 603 pp->cmd_tbl = virt_to_phys((void *)mem); 604 debug("cmd_tbl_dma = %lx\n", pp->cmd_tbl); 605 606 mem += AHCI_CMD_TBL_HDR; 607 pp->cmd_tbl_sg = 608 (struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem); 609 610 writel_with_flush((unsigned long)pp->cmd_slot, 611 port_mmio + PORT_LST_ADDR); 612 613 writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR); 614 615 #ifdef CONFIG_SUNXI_AHCI 616 sunxi_dma_init(port_mmio); 617 #endif 618 619 writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX | 620 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP | 621 PORT_CMD_START, port_mmio + PORT_CMD); 622 623 debug("Exit start port %d\n", port); 624 625 /* 626 * Make sure interface is not busy based on error and status 627 * information from task file data register before proceeding 628 */ 629 return wait_spinup(port_mmio); 630 } 631 632 633 static int ahci_device_data_io(struct ahci_uc_priv *uc_priv, u8 port, u8 *fis, 634 int fis_len, u8 *buf, int buf_len, u8 is_write) 635 { 636 637 struct ahci_ioports *pp = &(uc_priv->port[port]); 638 void __iomem *port_mmio = pp->port_mmio; 639 u32 opts; 640 u32 port_status; 641 int sg_count; 642 643 debug("Enter %s: for port %d\n", __func__, port); 644 645 if (port > uc_priv->n_ports) { 646 printf("Invalid port number %d\n", port); 647 return -1; 648 } 649 650 port_status = readl(port_mmio + PORT_SCR_STAT); 651 if ((port_status & 0xf) != 0x03) { 652 debug("No Link on port %d!\n", port); 653 return -1; 654 } 655 656 memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len); 657 658 sg_count = ahci_fill_sg(uc_priv, port, buf, buf_len); 659 opts = (fis_len >> 2) | (sg_count << 16) | (is_write << 6); 660 ahci_fill_cmd_slot(pp, opts); 661 662 ahci_dcache_flush_sata_cmd(pp); 663 ahci_dcache_flush_range((unsigned long)buf, (unsigned long)buf_len); 664 665 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE); 666 667 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 668 WAIT_MS_DATAIO, 0x1)) { 669 printf("timeout exit!\n"); 670 return -1; 671 } 672 673 ahci_dcache_invalidate_range((unsigned long)buf, 674 (unsigned long)buf_len); 675 debug("%s: %d byte transferred.\n", __func__, pp->cmd_slot->status); 676 677 return 0; 678 } 679 680 681 static char *ata_id_strcpy(u16 *target, u16 *src, int len) 682 { 683 int i; 684 for (i = 0; i < len / 2; i++) 685 target[i] = swab16(src[i]); 686 return (char *)target; 687 } 688 689 /* 690 * SCSI INQUIRY command operation. 691 */ 692 static int ata_scsiop_inquiry(struct ahci_uc_priv *uc_priv, 693 struct scsi_cmd *pccb) 694 { 695 static const u8 hdr[] = { 696 0, 697 0, 698 0x5, /* claim SPC-3 version compatibility */ 699 2, 700 95 - 4, 701 }; 702 u8 fis[20]; 703 u16 *idbuf; 704 ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS); 705 u8 port; 706 707 /* Clean ccb data buffer */ 708 memset(pccb->pdata, 0, pccb->datalen); 709 710 memcpy(pccb->pdata, hdr, sizeof(hdr)); 711 712 if (pccb->datalen <= 35) 713 return 0; 714 715 memset(fis, 0, sizeof(fis)); 716 /* Construct the FIS */ 717 fis[0] = 0x27; /* Host to device FIS. */ 718 fis[1] = 1 << 7; /* Command FIS. */ 719 fis[2] = ATA_CMD_ID_ATA; /* Command byte. */ 720 721 /* Read id from sata */ 722 port = pccb->target; 723 724 if (ahci_device_data_io(uc_priv, port, (u8 *)&fis, sizeof(fis), 725 (u8 *)tmpid, ATA_ID_WORDS * 2, 0)) { 726 debug("scsi_ahci: SCSI inquiry command failure.\n"); 727 return -EIO; 728 } 729 730 if (!uc_priv->ataid[port]) { 731 uc_priv->ataid[port] = malloc(ATA_ID_WORDS * 2); 732 if (!uc_priv->ataid[port]) { 733 printf("%s: No memory for ataid[port]\n", __func__); 734 return -ENOMEM; 735 } 736 } 737 738 idbuf = uc_priv->ataid[port]; 739 740 memcpy(idbuf, tmpid, ATA_ID_WORDS * 2); 741 ata_swap_buf_le16(idbuf, ATA_ID_WORDS); 742 743 memcpy(&pccb->pdata[8], "ATA ", 8); 744 ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16); 745 ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4); 746 747 #ifdef DEBUG 748 ata_dump_id(idbuf); 749 #endif 750 return 0; 751 } 752 753 754 /* 755 * SCSI READ10/WRITE10 command operation. 756 */ 757 static int ata_scsiop_read_write(struct ahci_uc_priv *uc_priv, 758 struct scsi_cmd *pccb, u8 is_write) 759 { 760 lbaint_t lba = 0; 761 u16 blocks = 0; 762 u8 fis[20]; 763 u8 *user_buffer = pccb->pdata; 764 u32 user_buffer_size = pccb->datalen; 765 766 /* Retrieve the base LBA number from the ccb structure. */ 767 if (pccb->cmd[0] == SCSI_READ16) { 768 memcpy(&lba, pccb->cmd + 2, 8); 769 lba = be64_to_cpu(lba); 770 } else { 771 u32 temp; 772 memcpy(&temp, pccb->cmd + 2, 4); 773 lba = be32_to_cpu(temp); 774 } 775 776 /* 777 * Retrieve the base LBA number and the block count from 778 * the ccb structure. 779 * 780 * For 10-byte and 16-byte SCSI R/W commands, transfer 781 * length 0 means transfer 0 block of data. 782 * However, for ATA R/W commands, sector count 0 means 783 * 256 or 65536 sectors, not 0 sectors as in SCSI. 784 * 785 * WARNING: one or two older ATA drives treat 0 as 0... 786 */ 787 if (pccb->cmd[0] == SCSI_READ16) 788 blocks = (((u16)pccb->cmd[13]) << 8) | ((u16) pccb->cmd[14]); 789 else 790 blocks = (((u16)pccb->cmd[7]) << 8) | ((u16) pccb->cmd[8]); 791 792 debug("scsi_ahci: %s %u blocks starting from lba 0x" LBAFU "\n", 793 is_write ? "write" : "read", blocks, lba); 794 795 /* Preset the FIS */ 796 memset(fis, 0, sizeof(fis)); 797 fis[0] = 0x27; /* Host to device FIS. */ 798 fis[1] = 1 << 7; /* Command FIS. */ 799 /* Command byte (read/write). */ 800 fis[2] = is_write ? ATA_CMD_WRITE_EXT : ATA_CMD_READ_EXT; 801 802 while (blocks) { 803 u16 now_blocks; /* number of blocks per iteration */ 804 u32 transfer_size; /* number of bytes per iteration */ 805 806 now_blocks = min((u16)MAX_SATA_BLOCKS_READ_WRITE, blocks); 807 808 transfer_size = ATA_SECT_SIZE * now_blocks; 809 if (transfer_size > user_buffer_size) { 810 printf("scsi_ahci: Error: buffer too small.\n"); 811 return -EIO; 812 } 813 814 /* 815 * LBA48 SATA command but only use 32bit address range within 816 * that (unless we've enabled 64bit LBA support). The next 817 * smaller command range (28bit) is too small. 818 */ 819 fis[4] = (lba >> 0) & 0xff; 820 fis[5] = (lba >> 8) & 0xff; 821 fis[6] = (lba >> 16) & 0xff; 822 fis[7] = 1 << 6; /* device reg: set LBA mode */ 823 fis[8] = ((lba >> 24) & 0xff); 824 #ifdef CONFIG_SYS_64BIT_LBA 825 if (pccb->cmd[0] == SCSI_READ16) { 826 fis[9] = ((lba >> 32) & 0xff); 827 fis[10] = ((lba >> 40) & 0xff); 828 } 829 #endif 830 831 fis[3] = 0xe0; /* features */ 832 833 /* Block (sector) count */ 834 fis[12] = (now_blocks >> 0) & 0xff; 835 fis[13] = (now_blocks >> 8) & 0xff; 836 837 /* Read/Write from ahci */ 838 if (ahci_device_data_io(uc_priv, pccb->target, (u8 *)&fis, 839 sizeof(fis), user_buffer, transfer_size, 840 is_write)) { 841 debug("scsi_ahci: SCSI %s10 command failure.\n", 842 is_write ? "WRITE" : "READ"); 843 return -EIO; 844 } 845 846 /* If this transaction is a write, do a following flush. 847 * Writes in u-boot are so rare, and the logic to know when is 848 * the last write and do a flush only there is sufficiently 849 * difficult. Just do a flush after every write. This incurs, 850 * usually, one extra flush when the rare writes do happen. 851 */ 852 if (is_write) { 853 if (-EIO == ata_io_flush(uc_priv, pccb->target)) 854 return -EIO; 855 } 856 user_buffer += transfer_size; 857 user_buffer_size -= transfer_size; 858 blocks -= now_blocks; 859 lba += now_blocks; 860 } 861 862 return 0; 863 } 864 865 866 /* 867 * SCSI READ CAPACITY10 command operation. 868 */ 869 static int ata_scsiop_read_capacity10(struct ahci_uc_priv *uc_priv, 870 struct scsi_cmd *pccb) 871 { 872 u32 cap; 873 u64 cap64; 874 u32 block_size; 875 876 if (!uc_priv->ataid[pccb->target]) { 877 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. " 878 "\tNo ATA info!\n" 879 "\tPlease run SCSI command INQUIRY first!\n"); 880 return -EPERM; 881 } 882 883 cap64 = ata_id_n_sectors(uc_priv->ataid[pccb->target]); 884 if (cap64 > 0x100000000ULL) 885 cap64 = 0xffffffff; 886 887 cap = cpu_to_be32(cap64); 888 memcpy(pccb->pdata, &cap, sizeof(cap)); 889 890 block_size = cpu_to_be32((u32)512); 891 memcpy(&pccb->pdata[4], &block_size, 4); 892 893 return 0; 894 } 895 896 897 /* 898 * SCSI READ CAPACITY16 command operation. 899 */ 900 static int ata_scsiop_read_capacity16(struct ahci_uc_priv *uc_priv, 901 struct scsi_cmd *pccb) 902 { 903 u64 cap; 904 u64 block_size; 905 906 if (!uc_priv->ataid[pccb->target]) { 907 printf("scsi_ahci: SCSI READ CAPACITY16 command failure. " 908 "\tNo ATA info!\n" 909 "\tPlease run SCSI command INQUIRY first!\n"); 910 return -EPERM; 911 } 912 913 cap = ata_id_n_sectors(uc_priv->ataid[pccb->target]); 914 cap = cpu_to_be64(cap); 915 memcpy(pccb->pdata, &cap, sizeof(cap)); 916 917 block_size = cpu_to_be64((u64)512); 918 memcpy(&pccb->pdata[8], &block_size, 8); 919 920 return 0; 921 } 922 923 924 /* 925 * SCSI TEST UNIT READY command operation. 926 */ 927 static int ata_scsiop_test_unit_ready(struct ahci_uc_priv *uc_priv, 928 struct scsi_cmd *pccb) 929 { 930 return (uc_priv->ataid[pccb->target]) ? 0 : -EPERM; 931 } 932 933 934 static int ahci_scsi_exec(struct udevice *dev, struct scsi_cmd *pccb) 935 { 936 struct ahci_uc_priv *uc_priv; 937 #ifdef CONFIG_DM_SCSI 938 uc_priv = dev_get_uclass_priv(dev->parent); 939 #else 940 uc_priv = probe_ent; 941 #endif 942 int ret; 943 944 switch (pccb->cmd[0]) { 945 case SCSI_READ16: 946 case SCSI_READ10: 947 ret = ata_scsiop_read_write(uc_priv, pccb, 0); 948 break; 949 case SCSI_WRITE10: 950 ret = ata_scsiop_read_write(uc_priv, pccb, 1); 951 break; 952 case SCSI_RD_CAPAC10: 953 ret = ata_scsiop_read_capacity10(uc_priv, pccb); 954 break; 955 case SCSI_RD_CAPAC16: 956 ret = ata_scsiop_read_capacity16(uc_priv, pccb); 957 break; 958 case SCSI_TST_U_RDY: 959 ret = ata_scsiop_test_unit_ready(uc_priv, pccb); 960 break; 961 case SCSI_INQUIRY: 962 ret = ata_scsiop_inquiry(uc_priv, pccb); 963 break; 964 default: 965 printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]); 966 return -ENOTSUPP; 967 } 968 969 if (ret) { 970 debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret); 971 return ret; 972 } 973 return 0; 974 975 } 976 977 static int ahci_start_ports(struct ahci_uc_priv *uc_priv) 978 { 979 u32 linkmap; 980 int i; 981 982 linkmap = uc_priv->link_port_map; 983 984 for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) { 985 if (((linkmap >> i) & 0x01)) { 986 if (ahci_port_start(uc_priv, (u8) i)) { 987 printf("Can not start port %d\n", i); 988 continue; 989 } 990 } 991 } 992 993 return 0; 994 } 995 996 #ifndef CONFIG_DM_SCSI 997 void scsi_low_level_init(int busdevfunc) 998 { 999 struct ahci_uc_priv *uc_priv; 1000 1001 #ifndef CONFIG_SCSI_AHCI_PLAT 1002 probe_ent = calloc(1, sizeof(struct ahci_uc_priv)); 1003 if (!probe_ent) { 1004 printf("%s: No memory for uc_priv\n", __func__); 1005 return; 1006 } 1007 uc_priv = probe_ent; 1008 # if defined(CONFIG_DM_PCI) 1009 struct udevice *dev; 1010 int ret; 1011 1012 ret = dm_pci_bus_find_bdf(busdevfunc, &dev); 1013 if (ret) 1014 return; 1015 ahci_init_one(uc_priv, dev); 1016 # else 1017 ahci_init_one(uc_priv, busdevfunc); 1018 # endif 1019 #else 1020 uc_priv = probe_ent; 1021 #endif 1022 1023 ahci_start_ports(uc_priv); 1024 } 1025 #endif 1026 1027 #ifndef CONFIG_SCSI_AHCI_PLAT 1028 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI) 1029 int ahci_init_one_dm(struct udevice *dev) 1030 { 1031 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev); 1032 1033 return ahci_init_one(uc_priv, dev); 1034 } 1035 #endif 1036 #endif 1037 1038 int ahci_start_ports_dm(struct udevice *dev) 1039 { 1040 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev); 1041 1042 return ahci_start_ports(uc_priv); 1043 } 1044 1045 #ifdef CONFIG_SCSI_AHCI_PLAT 1046 static int ahci_init_common(struct ahci_uc_priv *uc_priv, void __iomem *base) 1047 { 1048 int rc; 1049 1050 uc_priv->host_flags = ATA_FLAG_SATA 1051 | ATA_FLAG_NO_LEGACY 1052 | ATA_FLAG_MMIO 1053 | ATA_FLAG_PIO_DMA 1054 | ATA_FLAG_NO_ATAPI; 1055 uc_priv->pio_mask = 0x1f; 1056 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */ 1057 1058 uc_priv->mmio_base = base; 1059 1060 /* initialize adapter */ 1061 rc = ahci_host_init(uc_priv); 1062 if (rc) 1063 goto err_out; 1064 1065 ahci_print_info(uc_priv); 1066 1067 rc = ahci_start_ports(uc_priv); 1068 1069 err_out: 1070 return rc; 1071 } 1072 1073 #ifndef CONFIG_DM_SCSI 1074 int ahci_init(void __iomem *base) 1075 { 1076 struct ahci_uc_priv *uc_priv; 1077 1078 probe_ent = malloc(sizeof(struct ahci_uc_priv)); 1079 if (!probe_ent) { 1080 printf("%s: No memory for uc_priv\n", __func__); 1081 return -ENOMEM; 1082 } 1083 1084 uc_priv = probe_ent; 1085 memset(uc_priv, 0, sizeof(struct ahci_uc_priv)); 1086 1087 return ahci_init_common(uc_priv, base); 1088 } 1089 #endif 1090 1091 int ahci_init_dm(struct udevice *dev, void __iomem *base) 1092 { 1093 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev); 1094 1095 return ahci_init_common(uc_priv, base); 1096 } 1097 1098 void __weak scsi_init(void) 1099 { 1100 } 1101 1102 #endif /* CONFIG_SCSI_AHCI_PLAT */ 1103 1104 /* 1105 * In the general case of generic rotating media it makes sense to have a 1106 * flush capability. It probably even makes sense in the case of SSDs because 1107 * one cannot always know for sure what kind of internal cache/flush mechanism 1108 * is embodied therein. At first it was planned to invoke this after the last 1109 * write to disk and before rebooting. In practice, knowing, a priori, which 1110 * is the last write is difficult. Because writing to the disk in u-boot is 1111 * very rare, this flush command will be invoked after every block write. 1112 */ 1113 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port) 1114 { 1115 u8 fis[20]; 1116 struct ahci_ioports *pp = &(uc_priv->port[port]); 1117 void __iomem *port_mmio = pp->port_mmio; 1118 u32 cmd_fis_len = 5; /* five dwords */ 1119 1120 /* Preset the FIS */ 1121 memset(fis, 0, 20); 1122 fis[0] = 0x27; /* Host to device FIS. */ 1123 fis[1] = 1 << 7; /* Command FIS. */ 1124 fis[2] = ATA_CMD_FLUSH_EXT; 1125 1126 memcpy((unsigned char *)pp->cmd_tbl, fis, 20); 1127 ahci_fill_cmd_slot(pp, cmd_fis_len); 1128 ahci_dcache_flush_sata_cmd(pp); 1129 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE); 1130 1131 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 1132 WAIT_MS_FLUSH, 0x1)) { 1133 debug("scsi_ahci: flush command timeout on port %d.\n", port); 1134 return -EIO; 1135 } 1136 1137 return 0; 1138 } 1139 1140 static int ahci_scsi_bus_reset(struct udevice *dev) 1141 { 1142 /* Not implemented */ 1143 1144 return 0; 1145 } 1146 1147 #ifdef CONFIG_DM_SCSI 1148 int ahci_bind_scsi(struct udevice *ahci_dev, struct udevice **devp) 1149 { 1150 struct udevice *dev; 1151 int ret; 1152 1153 ret = device_bind_driver(ahci_dev, "ahci_scsi", "ahci_scsi", &dev); 1154 if (ret) 1155 return ret; 1156 *devp = dev; 1157 1158 return 0; 1159 } 1160 1161 int ahci_probe_scsi(struct udevice *ahci_dev, ulong base) 1162 { 1163 struct ahci_uc_priv *uc_priv; 1164 struct scsi_platdata *uc_plat; 1165 struct udevice *dev; 1166 int ret; 1167 1168 device_find_first_child(ahci_dev, &dev); 1169 if (!dev) 1170 return -ENODEV; 1171 uc_plat = dev_get_uclass_platdata(dev); 1172 uc_plat->base = base; 1173 uc_plat->max_lun = 1; 1174 uc_plat->max_id = 2; 1175 1176 uc_priv = dev_get_uclass_priv(ahci_dev); 1177 ret = ahci_init_one(uc_priv, dev); 1178 if (ret) 1179 return ret; 1180 ret = ahci_start_ports(uc_priv); 1181 if (ret) 1182 return ret; 1183 1184 return 0; 1185 } 1186 1187 #ifdef CONFIG_DM_PCI 1188 int ahci_probe_scsi_pci(struct udevice *ahci_dev) 1189 { 1190 ulong base; 1191 1192 base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5, 1193 PCI_REGION_MEM); 1194 1195 return ahci_probe_scsi(ahci_dev, base); 1196 } 1197 #endif 1198 1199 struct scsi_ops scsi_ops = { 1200 .exec = ahci_scsi_exec, 1201 .bus_reset = ahci_scsi_bus_reset, 1202 }; 1203 1204 U_BOOT_DRIVER(ahci_scsi) = { 1205 .name = "ahci_scsi", 1206 .id = UCLASS_SCSI, 1207 .ops = &scsi_ops, 1208 }; 1209 #else 1210 int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb) 1211 { 1212 return ahci_scsi_exec(dev, pccb); 1213 } 1214 1215 __weak int scsi_bus_reset(struct udevice *dev) 1216 { 1217 return ahci_scsi_bus_reset(dev); 1218 1219 return 0; 1220 } 1221 #endif 1222