1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/ata/sata_fsl.c 4 * 5 * Freescale 3.0Gbps SATA device driver 6 * 7 * Author: Ashish Kalra <ashish.kalra@freescale.com> 8 * Li Yang <leoli@freescale.com> 9 * 10 * Copyright (c) 2006-2007, 2011-2012 Freescale Semiconductor, Inc. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_address.h> 17 #include <linux/of_irq.h> 18 #include <linux/platform_device.h> 19 #include <linux/slab.h> 20 21 #include <scsi/scsi_host.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <linux/libata.h> 24 #include <asm/io.h> 25 26 static unsigned int intr_coalescing_count; 27 module_param(intr_coalescing_count, int, S_IRUGO); 28 MODULE_PARM_DESC(intr_coalescing_count, 29 "INT coalescing count threshold (1..31)"); 30 31 static unsigned int intr_coalescing_ticks; 32 module_param(intr_coalescing_ticks, int, S_IRUGO); 33 MODULE_PARM_DESC(intr_coalescing_ticks, 34 "INT coalescing timer threshold in AHB ticks"); 35 /* Controller information */ 36 enum { 37 SATA_FSL_QUEUE_DEPTH = 16, 38 SATA_FSL_MAX_PRD = 63, 39 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1, 40 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */ 41 42 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | 43 ATA_FLAG_PMP | ATA_FLAG_NCQ | 44 ATA_FLAG_AN | ATA_FLAG_NO_LOG_PAGE), 45 46 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH, 47 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */ 48 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE), 49 50 /* 51 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and 52 * chained indirect PRDEs up to a max count of 63. 53 * We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will 54 * be setup as an indirect descriptor, pointing to it's next 55 * (contiguous) PRDE. Though chained indirect PRDE arrays are 56 * supported,it will be more efficient to use a direct PRDT and 57 * a single chain/link to indirect PRDE array/PRDT. 58 */ 59 60 SATA_FSL_CMD_DESC_CFIS_SZ = 32, 61 SATA_FSL_CMD_DESC_SFIS_SZ = 32, 62 SATA_FSL_CMD_DESC_ACMD_SZ = 16, 63 SATA_FSL_CMD_DESC_RSRVD = 16, 64 65 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ + 66 SATA_FSL_CMD_DESC_SFIS_SZ + 67 SATA_FSL_CMD_DESC_ACMD_SZ + 68 SATA_FSL_CMD_DESC_RSRVD + 69 SATA_FSL_MAX_PRD * 16), 70 71 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT = 72 (SATA_FSL_CMD_DESC_CFIS_SZ + 73 SATA_FSL_CMD_DESC_SFIS_SZ + 74 SATA_FSL_CMD_DESC_ACMD_SZ + 75 SATA_FSL_CMD_DESC_RSRVD), 76 77 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS), 78 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE + 79 SATA_FSL_CMD_DESC_AR_SZ), 80 81 /* 82 * MPC8315 has two SATA controllers, SATA1 & SATA2 83 * (one port per controller) 84 * MPC837x has 2/4 controllers, one port per controller 85 */ 86 87 SATA_FSL_MAX_PORTS = 1, 88 89 SATA_FSL_IRQ_FLAG = IRQF_SHARED, 90 }; 91 92 /* 93 * Interrupt Coalescing Control Register bitdefs */ 94 enum { 95 ICC_MIN_INT_COUNT_THRESHOLD = 1, 96 ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1), 97 ICC_MIN_INT_TICKS_THRESHOLD = 0, 98 ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1), 99 ICC_SAFE_INT_TICKS = 1, 100 }; 101 102 /* 103 * Host Controller command register set - per port 104 */ 105 enum { 106 CQ = 0, 107 CA = 8, 108 CC = 0x10, 109 CE = 0x18, 110 DE = 0x20, 111 CHBA = 0x24, 112 HSTATUS = 0x28, 113 HCONTROL = 0x2C, 114 CQPMP = 0x30, 115 SIGNATURE = 0x34, 116 ICC = 0x38, 117 118 /* 119 * Host Status Register (HStatus) bitdefs 120 */ 121 ONLINE = (1 << 31), 122 GOING_OFFLINE = (1 << 30), 123 BIST_ERR = (1 << 29), 124 CLEAR_ERROR = (1 << 27), 125 126 FATAL_ERR_HC_MASTER_ERR = (1 << 18), 127 FATAL_ERR_PARITY_ERR_TX = (1 << 17), 128 FATAL_ERR_PARITY_ERR_RX = (1 << 16), 129 FATAL_ERR_DATA_UNDERRUN = (1 << 13), 130 FATAL_ERR_DATA_OVERRUN = (1 << 12), 131 FATAL_ERR_CRC_ERR_TX = (1 << 11), 132 FATAL_ERR_CRC_ERR_RX = (1 << 10), 133 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9), 134 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8), 135 136 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR | 137 FATAL_ERR_PARITY_ERR_TX | 138 FATAL_ERR_PARITY_ERR_RX | 139 FATAL_ERR_DATA_UNDERRUN | 140 FATAL_ERR_DATA_OVERRUN | 141 FATAL_ERR_CRC_ERR_TX | 142 FATAL_ERR_CRC_ERR_RX | 143 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX, 144 145 INT_ON_DATA_LENGTH_MISMATCH = (1 << 12), 146 INT_ON_FATAL_ERR = (1 << 5), 147 INT_ON_PHYRDY_CHG = (1 << 4), 148 149 INT_ON_SIGNATURE_UPDATE = (1 << 3), 150 INT_ON_SNOTIFY_UPDATE = (1 << 2), 151 INT_ON_SINGL_DEVICE_ERR = (1 << 1), 152 INT_ON_CMD_COMPLETE = 1, 153 154 INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE | 155 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR, 156 157 /* 158 * Host Control Register (HControl) bitdefs 159 */ 160 HCONTROL_ONLINE_PHY_RST = (1 << 31), 161 HCONTROL_FORCE_OFFLINE = (1 << 30), 162 HCONTROL_LEGACY = (1 << 28), 163 HCONTROL_PARITY_PROT_MOD = (1 << 14), 164 HCONTROL_DPATH_PARITY = (1 << 12), 165 HCONTROL_SNOOP_ENABLE = (1 << 10), 166 HCONTROL_PMP_ATTACHED = (1 << 9), 167 HCONTROL_COPYOUT_STATFIS = (1 << 8), 168 IE_ON_FATAL_ERR = (1 << 5), 169 IE_ON_PHYRDY_CHG = (1 << 4), 170 IE_ON_SIGNATURE_UPDATE = (1 << 3), 171 IE_ON_SNOTIFY_UPDATE = (1 << 2), 172 IE_ON_SINGL_DEVICE_ERR = (1 << 1), 173 IE_ON_CMD_COMPLETE = 1, 174 175 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG | 176 IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE | 177 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE, 178 179 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31), 180 DATA_SNOOP_ENABLE_V1 = (1 << 22), 181 DATA_SNOOP_ENABLE_V2 = (1 << 28), 182 }; 183 184 /* 185 * SATA Superset Registers 186 */ 187 enum { 188 SSTATUS = 0, 189 SERROR = 4, 190 SCONTROL = 8, 191 SNOTIFY = 0xC, 192 }; 193 194 /* 195 * Control Status Register Set 196 */ 197 enum { 198 TRANSCFG = 0, 199 TRANSSTATUS = 4, 200 LINKCFG = 8, 201 LINKCFG1 = 0xC, 202 LINKCFG2 = 0x10, 203 LINKSTATUS = 0x14, 204 LINKSTATUS1 = 0x18, 205 PHYCTRLCFG = 0x1C, 206 COMMANDSTAT = 0x20, 207 }; 208 209 /* TRANSCFG (transport-layer) configuration control */ 210 enum { 211 TRANSCFG_RX_WATER_MARK = (1 << 4), 212 }; 213 214 /* PHY (link-layer) configuration control */ 215 enum { 216 PHY_BIST_ENABLE = 0x01, 217 }; 218 219 /* 220 * Command Header Table entry, i.e, command slot 221 * 4 Dwords per command slot, command header size == 64 Dwords. 222 */ 223 struct cmdhdr_tbl_entry { 224 __le32 cda; 225 __le32 prde_fis_len; 226 __le32 ttl; 227 __le32 desc_info; 228 }; 229 230 /* 231 * Description information bitdefs 232 */ 233 enum { 234 CMD_DESC_RES = (1 << 11), 235 VENDOR_SPECIFIC_BIST = (1 << 10), 236 CMD_DESC_SNOOP_ENABLE = (1 << 9), 237 FPDMA_QUEUED_CMD = (1 << 8), 238 SRST_CMD = (1 << 7), 239 BIST = (1 << 6), 240 ATAPI_CMD = (1 << 5), 241 }; 242 243 /* 244 * Command Descriptor 245 */ 246 struct command_desc { 247 u8 cfis[8 * 4]; 248 u8 sfis[8 * 4]; 249 struct_group(cdb, 250 u8 acmd[4 * 4]; 251 u8 fill[4 * 4]; 252 ); 253 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4]; 254 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4]; 255 }; 256 257 /* 258 * Physical region table descriptor(PRD) 259 */ 260 261 struct prde { 262 __le32 dba; 263 u8 fill[2 * 4]; 264 __le32 ddc_and_ext; 265 }; 266 267 /* 268 * ata_port private data 269 * This is our per-port instance data. 270 */ 271 struct sata_fsl_port_priv { 272 struct cmdhdr_tbl_entry *cmdslot; 273 dma_addr_t cmdslot_paddr; 274 struct command_desc *cmdentry; 275 dma_addr_t cmdentry_paddr; 276 }; 277 278 /* 279 * ata_port->host_set private data 280 */ 281 struct sata_fsl_host_priv { 282 void __iomem *hcr_base; 283 void __iomem *ssr_base; 284 void __iomem *csr_base; 285 int irq; 286 int data_snoop; 287 struct device_attribute intr_coalescing; 288 struct device_attribute rx_watermark; 289 }; 290 291 static void fsl_sata_set_irq_coalescing(struct ata_host *host, 292 unsigned int count, unsigned int ticks) 293 { 294 struct sata_fsl_host_priv *host_priv = host->private_data; 295 void __iomem *hcr_base = host_priv->hcr_base; 296 unsigned long flags; 297 298 if (count > ICC_MAX_INT_COUNT_THRESHOLD) 299 count = ICC_MAX_INT_COUNT_THRESHOLD; 300 else if (count < ICC_MIN_INT_COUNT_THRESHOLD) 301 count = ICC_MIN_INT_COUNT_THRESHOLD; 302 303 if (ticks > ICC_MAX_INT_TICKS_THRESHOLD) 304 ticks = ICC_MAX_INT_TICKS_THRESHOLD; 305 else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) && 306 (count > ICC_MIN_INT_COUNT_THRESHOLD)) 307 ticks = ICC_SAFE_INT_TICKS; 308 309 spin_lock_irqsave(&host->lock, flags); 310 iowrite32((count << 24 | ticks), hcr_base + ICC); 311 312 intr_coalescing_count = count; 313 intr_coalescing_ticks = ticks; 314 spin_unlock_irqrestore(&host->lock, flags); 315 316 dev_dbg(host->dev, "interrupt coalescing, count = 0x%x, ticks = %x\n", 317 intr_coalescing_count, intr_coalescing_ticks); 318 dev_dbg(host->dev, "ICC register status: (hcr base: 0x%p) = 0x%x\n", 319 hcr_base, ioread32(hcr_base + ICC)); 320 } 321 322 static ssize_t fsl_sata_intr_coalescing_show(struct device *dev, 323 struct device_attribute *attr, char *buf) 324 { 325 return sysfs_emit(buf, "%u %u\n", 326 intr_coalescing_count, intr_coalescing_ticks); 327 } 328 329 static ssize_t fsl_sata_intr_coalescing_store(struct device *dev, 330 struct device_attribute *attr, 331 const char *buf, size_t count) 332 { 333 unsigned int coalescing_count, coalescing_ticks; 334 335 if (sscanf(buf, "%u%u", &coalescing_count, &coalescing_ticks) != 2) { 336 dev_err(dev, "fsl-sata: wrong parameter format.\n"); 337 return -EINVAL; 338 } 339 340 fsl_sata_set_irq_coalescing(dev_get_drvdata(dev), 341 coalescing_count, coalescing_ticks); 342 343 return strlen(buf); 344 } 345 346 static ssize_t fsl_sata_rx_watermark_show(struct device *dev, 347 struct device_attribute *attr, char *buf) 348 { 349 unsigned int rx_watermark; 350 unsigned long flags; 351 struct ata_host *host = dev_get_drvdata(dev); 352 struct sata_fsl_host_priv *host_priv = host->private_data; 353 void __iomem *csr_base = host_priv->csr_base; 354 355 spin_lock_irqsave(&host->lock, flags); 356 rx_watermark = ioread32(csr_base + TRANSCFG); 357 rx_watermark &= 0x1f; 358 spin_unlock_irqrestore(&host->lock, flags); 359 360 return sysfs_emit(buf, "%u\n", rx_watermark); 361 } 362 363 static ssize_t fsl_sata_rx_watermark_store(struct device *dev, 364 struct device_attribute *attr, 365 const char *buf, size_t count) 366 { 367 unsigned int rx_watermark; 368 unsigned long flags; 369 struct ata_host *host = dev_get_drvdata(dev); 370 struct sata_fsl_host_priv *host_priv = host->private_data; 371 void __iomem *csr_base = host_priv->csr_base; 372 u32 temp; 373 374 if (kstrtouint(buf, 10, &rx_watermark) < 0) { 375 dev_err(dev, "fsl-sata: wrong parameter format.\n"); 376 return -EINVAL; 377 } 378 379 spin_lock_irqsave(&host->lock, flags); 380 temp = ioread32(csr_base + TRANSCFG); 381 temp &= 0xffffffe0; 382 iowrite32(temp | rx_watermark, csr_base + TRANSCFG); 383 spin_unlock_irqrestore(&host->lock, flags); 384 385 return strlen(buf); 386 } 387 388 static inline unsigned int sata_fsl_tag(struct ata_port *ap, 389 unsigned int tag, 390 void __iomem *hcr_base) 391 { 392 /* We let libATA core do actual (queue) tag allocation */ 393 394 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) { 395 ata_port_dbg(ap, "tag %d invalid : out of range\n", tag); 396 return 0; 397 } 398 399 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) { 400 ata_port_dbg(ap, "tag %d invalid : in use!!\n", tag); 401 return 0; 402 } 403 404 return tag; 405 } 406 407 static void sata_fsl_setup_cmd_hdr_entry(struct ata_port *ap, 408 struct sata_fsl_port_priv *pp, 409 unsigned int tag, u32 desc_info, 410 u32 data_xfer_len, u8 num_prde, 411 u8 fis_len) 412 { 413 dma_addr_t cmd_descriptor_address; 414 415 cmd_descriptor_address = pp->cmdentry_paddr + 416 tag * SATA_FSL_CMD_DESC_SIZE; 417 418 /* NOTE: both data_xfer_len & fis_len are Dword counts */ 419 420 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address); 421 pp->cmdslot[tag].prde_fis_len = 422 cpu_to_le32((num_prde << 16) | (fis_len << 2)); 423 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03); 424 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F)); 425 426 ata_port_dbg(ap, "cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n", 427 le32_to_cpu(pp->cmdslot[tag].cda), 428 le32_to_cpu(pp->cmdslot[tag].prde_fis_len), 429 le32_to_cpu(pp->cmdslot[tag].ttl), 430 le32_to_cpu(pp->cmdslot[tag].desc_info)); 431 } 432 433 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc, 434 u32 *ttl, dma_addr_t cmd_desc_paddr, 435 int data_snoop) 436 { 437 struct scatterlist *sg; 438 unsigned int num_prde = 0; 439 u32 ttl_dwords = 0; 440 441 /* 442 * NOTE : direct & indirect prdt's are contiguously allocated 443 */ 444 struct prde *prd = (struct prde *)&((struct command_desc *) 445 cmd_desc)->prdt; 446 447 struct prde *prd_ptr_to_indirect_ext = NULL; 448 unsigned indirect_ext_segment_sz = 0; 449 dma_addr_t indirect_ext_segment_paddr; 450 unsigned int si; 451 452 indirect_ext_segment_paddr = cmd_desc_paddr + 453 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16; 454 455 for_each_sg(qc->sg, sg, qc->n_elem, si) { 456 dma_addr_t sg_addr = sg_dma_address(sg); 457 u32 sg_len = sg_dma_len(sg); 458 459 /* warn if each s/g element is not dword aligned */ 460 if (unlikely(sg_addr & 0x03)) 461 ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n", 462 (unsigned long long)sg_addr); 463 if (unlikely(sg_len & 0x03)) 464 ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n", 465 sg_len); 466 467 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) && 468 sg_next(sg) != NULL) { 469 prd_ptr_to_indirect_ext = prd; 470 prd->dba = cpu_to_le32(indirect_ext_segment_paddr); 471 indirect_ext_segment_sz = 0; 472 ++prd; 473 ++num_prde; 474 } 475 476 ttl_dwords += sg_len; 477 prd->dba = cpu_to_le32(sg_addr); 478 prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03)); 479 480 ++num_prde; 481 ++prd; 482 if (prd_ptr_to_indirect_ext) 483 indirect_ext_segment_sz += sg_len; 484 } 485 486 if (prd_ptr_to_indirect_ext) { 487 /* set indirect extension flag along with indirect ext. size */ 488 prd_ptr_to_indirect_ext->ddc_and_ext = 489 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG | 490 data_snoop | 491 (indirect_ext_segment_sz & ~0x03))); 492 } 493 494 *ttl = ttl_dwords; 495 return num_prde; 496 } 497 498 static enum ata_completion_errors sata_fsl_qc_prep(struct ata_queued_cmd *qc) 499 { 500 struct ata_port *ap = qc->ap; 501 struct sata_fsl_port_priv *pp = ap->private_data; 502 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 503 void __iomem *hcr_base = host_priv->hcr_base; 504 unsigned int tag = sata_fsl_tag(ap, qc->hw_tag, hcr_base); 505 struct command_desc *cd; 506 u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE; 507 u32 num_prde = 0; 508 u32 ttl_dwords = 0; 509 dma_addr_t cd_paddr; 510 511 cd = (struct command_desc *)pp->cmdentry + tag; 512 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE; 513 514 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis); 515 516 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */ 517 if (ata_is_atapi(qc->tf.protocol)) { 518 desc_info |= ATAPI_CMD; 519 memset(&cd->cdb, 0, sizeof(cd->cdb)); 520 memcpy(&cd->cdb, qc->cdb, qc->dev->cdb_len); 521 } 522 523 if (qc->flags & ATA_QCFLAG_DMAMAP) 524 num_prde = sata_fsl_fill_sg(qc, (void *)cd, 525 &ttl_dwords, cd_paddr, 526 host_priv->data_snoop); 527 528 if (qc->tf.protocol == ATA_PROT_NCQ) 529 desc_info |= FPDMA_QUEUED_CMD; 530 531 sata_fsl_setup_cmd_hdr_entry(ap, pp, tag, desc_info, ttl_dwords, 532 num_prde, 5); 533 534 ata_port_dbg(ap, "SATA FSL : di = 0x%x, ttl = %d, num_prde = %d\n", 535 desc_info, ttl_dwords, num_prde); 536 537 return AC_ERR_OK; 538 } 539 540 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc) 541 { 542 struct ata_port *ap = qc->ap; 543 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 544 void __iomem *hcr_base = host_priv->hcr_base; 545 unsigned int tag = sata_fsl_tag(ap, qc->hw_tag, hcr_base); 546 547 ata_port_dbg(ap, "CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n", 548 ioread32(CQ + hcr_base), 549 ioread32(CA + hcr_base), 550 ioread32(CE + hcr_base), ioread32(CC + hcr_base)); 551 552 iowrite32(qc->dev->link->pmp, CQPMP + hcr_base); 553 554 /* Simply queue command to the controller/device */ 555 iowrite32(1 << tag, CQ + hcr_base); 556 557 ata_port_dbg(ap, "tag=%d, CQ=0x%x, CA=0x%x\n", 558 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base)); 559 560 ata_port_dbg(ap, "CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n", 561 ioread32(CE + hcr_base), 562 ioread32(DE + hcr_base), 563 ioread32(CC + hcr_base), 564 ioread32(COMMANDSTAT + host_priv->csr_base)); 565 566 return 0; 567 } 568 569 static void sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc) 570 { 571 struct sata_fsl_port_priv *pp = qc->ap->private_data; 572 struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data; 573 void __iomem *hcr_base = host_priv->hcr_base; 574 unsigned int tag = sata_fsl_tag(qc->ap, qc->hw_tag, hcr_base); 575 struct command_desc *cd; 576 577 cd = pp->cmdentry + tag; 578 579 ata_tf_from_fis(cd->sfis, &qc->result_tf); 580 } 581 582 static int sata_fsl_scr_write(struct ata_link *link, 583 unsigned int sc_reg_in, u32 val) 584 { 585 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; 586 void __iomem *ssr_base = host_priv->ssr_base; 587 unsigned int sc_reg; 588 589 switch (sc_reg_in) { 590 case SCR_STATUS: 591 case SCR_ERROR: 592 case SCR_CONTROL: 593 case SCR_ACTIVE: 594 sc_reg = sc_reg_in; 595 break; 596 default: 597 return -EINVAL; 598 } 599 600 ata_link_dbg(link, "reg_in = %d\n", sc_reg); 601 602 iowrite32(val, ssr_base + (sc_reg * 4)); 603 return 0; 604 } 605 606 static int sata_fsl_scr_read(struct ata_link *link, 607 unsigned int sc_reg_in, u32 *val) 608 { 609 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; 610 void __iomem *ssr_base = host_priv->ssr_base; 611 unsigned int sc_reg; 612 613 switch (sc_reg_in) { 614 case SCR_STATUS: 615 case SCR_ERROR: 616 case SCR_CONTROL: 617 case SCR_ACTIVE: 618 sc_reg = sc_reg_in; 619 break; 620 default: 621 return -EINVAL; 622 } 623 624 ata_link_dbg(link, "reg_in = %d\n", sc_reg); 625 626 *val = ioread32(ssr_base + (sc_reg * 4)); 627 return 0; 628 } 629 630 static void sata_fsl_freeze(struct ata_port *ap) 631 { 632 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 633 void __iomem *hcr_base = host_priv->hcr_base; 634 u32 temp; 635 636 ata_port_dbg(ap, "CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n", 637 ioread32(CQ + hcr_base), 638 ioread32(CA + hcr_base), 639 ioread32(CE + hcr_base), ioread32(DE + hcr_base)); 640 ata_port_dbg(ap, "CmdStat = 0x%x\n", 641 ioread32(host_priv->csr_base + COMMANDSTAT)); 642 643 /* disable interrupts on the controller/port */ 644 temp = ioread32(hcr_base + HCONTROL); 645 iowrite32((temp & ~0x3F), hcr_base + HCONTROL); 646 647 ata_port_dbg(ap, "HControl = 0x%x, HStatus = 0x%x\n", 648 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); 649 } 650 651 static void sata_fsl_thaw(struct ata_port *ap) 652 { 653 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 654 void __iomem *hcr_base = host_priv->hcr_base; 655 u32 temp; 656 657 /* ack. any pending IRQs for this controller/port */ 658 temp = ioread32(hcr_base + HSTATUS); 659 660 ata_port_dbg(ap, "pending IRQs = 0x%x\n", (temp & 0x3F)); 661 662 if (temp & 0x3F) 663 iowrite32((temp & 0x3F), hcr_base + HSTATUS); 664 665 /* enable interrupts on the controller/port */ 666 temp = ioread32(hcr_base + HCONTROL); 667 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL); 668 669 ata_port_dbg(ap, "HControl = 0x%x, HStatus = 0x%x\n", 670 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); 671 } 672 673 static void sata_fsl_pmp_attach(struct ata_port *ap) 674 { 675 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 676 void __iomem *hcr_base = host_priv->hcr_base; 677 u32 temp; 678 679 temp = ioread32(hcr_base + HCONTROL); 680 iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL); 681 } 682 683 static void sata_fsl_pmp_detach(struct ata_port *ap) 684 { 685 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 686 void __iomem *hcr_base = host_priv->hcr_base; 687 u32 temp; 688 689 temp = ioread32(hcr_base + HCONTROL); 690 temp &= ~HCONTROL_PMP_ATTACHED; 691 iowrite32(temp, hcr_base + HCONTROL); 692 693 /* enable interrupts on the controller/port */ 694 temp = ioread32(hcr_base + HCONTROL); 695 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL); 696 697 } 698 699 static int sata_fsl_port_start(struct ata_port *ap) 700 { 701 struct device *dev = ap->host->dev; 702 struct sata_fsl_port_priv *pp; 703 void *mem; 704 dma_addr_t mem_dma; 705 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 706 void __iomem *hcr_base = host_priv->hcr_base; 707 u32 temp; 708 709 pp = kzalloc(sizeof(*pp), GFP_KERNEL); 710 if (!pp) 711 return -ENOMEM; 712 713 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma, 714 GFP_KERNEL); 715 if (!mem) { 716 kfree(pp); 717 return -ENOMEM; 718 } 719 720 pp->cmdslot = mem; 721 pp->cmdslot_paddr = mem_dma; 722 723 mem += SATA_FSL_CMD_SLOT_SIZE; 724 mem_dma += SATA_FSL_CMD_SLOT_SIZE; 725 726 pp->cmdentry = mem; 727 pp->cmdentry_paddr = mem_dma; 728 729 ap->private_data = pp; 730 731 ata_port_dbg(ap, "CHBA = 0x%lx, cmdentry_phys = 0x%lx\n", 732 (unsigned long)pp->cmdslot_paddr, 733 (unsigned long)pp->cmdentry_paddr); 734 735 /* Now, update the CHBA register in host controller cmd register set */ 736 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA); 737 738 /* 739 * Now, we can bring the controller on-line & also initiate 740 * the COMINIT sequence, we simply return here and the boot-probing 741 * & device discovery process is re-initiated by libATA using a 742 * Softreset EH (dummy) session. Hence, boot probing and device 743 * discovey will be part of sata_fsl_softreset() callback. 744 */ 745 746 temp = ioread32(hcr_base + HCONTROL); 747 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL); 748 749 ata_port_dbg(ap, "HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 750 ata_port_dbg(ap, "HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 751 ata_port_dbg(ap, "CHBA = 0x%x\n", ioread32(hcr_base + CHBA)); 752 753 return 0; 754 } 755 756 static void sata_fsl_port_stop(struct ata_port *ap) 757 { 758 struct device *dev = ap->host->dev; 759 struct sata_fsl_port_priv *pp = ap->private_data; 760 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 761 void __iomem *hcr_base = host_priv->hcr_base; 762 u32 temp; 763 764 /* 765 * Force host controller to go off-line, aborting current operations 766 */ 767 temp = ioread32(hcr_base + HCONTROL); 768 temp &= ~HCONTROL_ONLINE_PHY_RST; 769 temp |= HCONTROL_FORCE_OFFLINE; 770 iowrite32(temp, hcr_base + HCONTROL); 771 772 /* Poll for controller to go offline - should happen immediately */ 773 ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1); 774 775 ap->private_data = NULL; 776 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, 777 pp->cmdslot, pp->cmdslot_paddr); 778 779 kfree(pp); 780 } 781 782 static unsigned int sata_fsl_dev_classify(struct ata_port *ap) 783 { 784 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 785 void __iomem *hcr_base = host_priv->hcr_base; 786 struct ata_taskfile tf; 787 u32 temp; 788 789 temp = ioread32(hcr_base + SIGNATURE); 790 791 ata_port_dbg(ap, "HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 792 ata_port_dbg(ap, "HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 793 794 tf.lbah = (temp >> 24) & 0xff; 795 tf.lbam = (temp >> 16) & 0xff; 796 tf.lbal = (temp >> 8) & 0xff; 797 tf.nsect = temp & 0xff; 798 799 return ata_port_classify(ap, &tf); 800 } 801 802 static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class, 803 unsigned long deadline) 804 { 805 struct ata_port *ap = link->ap; 806 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 807 void __iomem *hcr_base = host_priv->hcr_base; 808 u32 temp; 809 int i = 0; 810 unsigned long start_jiffies; 811 812 try_offline_again: 813 /* 814 * Force host controller to go off-line, aborting current operations 815 */ 816 temp = ioread32(hcr_base + HCONTROL); 817 temp &= ~HCONTROL_ONLINE_PHY_RST; 818 iowrite32(temp, hcr_base + HCONTROL); 819 820 /* Poll for controller to go offline */ 821 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 822 1, 500); 823 824 if (temp & ONLINE) { 825 ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i); 826 827 /* 828 * Try to offline controller atleast twice 829 */ 830 i++; 831 if (i == 2) 832 goto err; 833 else 834 goto try_offline_again; 835 } 836 837 ata_port_dbg(ap, "hardreset, controller off-lined\n" 838 "HStatus = 0x%x HControl = 0x%x\n", 839 ioread32(hcr_base + HSTATUS), 840 ioread32(hcr_base + HCONTROL)); 841 842 /* 843 * PHY reset should remain asserted for atleast 1ms 844 */ 845 ata_msleep(ap, 1); 846 847 sata_set_spd(link); 848 849 /* 850 * Now, bring the host controller online again, this can take time 851 * as PHY reset and communication establishment, 1st D2H FIS and 852 * device signature update is done, on safe side assume 500ms 853 * NOTE : Host online status may be indicated immediately!! 854 */ 855 856 temp = ioread32(hcr_base + HCONTROL); 857 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE); 858 temp |= HCONTROL_PMP_ATTACHED; 859 iowrite32(temp, hcr_base + HCONTROL); 860 861 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500); 862 863 if (!(temp & ONLINE)) { 864 ata_port_err(ap, "Hardreset failed, not on-lined\n"); 865 goto err; 866 } 867 868 ata_port_dbg(ap, "controller off-lined & on-lined\n" 869 "HStatus = 0x%x HControl = 0x%x\n", 870 ioread32(hcr_base + HSTATUS), 871 ioread32(hcr_base + HCONTROL)); 872 873 /* 874 * First, wait for the PHYRDY change to occur before waiting for 875 * the signature, and also verify if SStatus indicates device 876 * presence 877 */ 878 879 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500); 880 if ((!(temp & 0x10)) || ata_link_offline(link)) { 881 ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n", 882 ioread32(hcr_base + HSTATUS)); 883 *class = ATA_DEV_NONE; 884 return 0; 885 } 886 887 /* 888 * Wait for the first D2H from device,i.e,signature update notification 889 */ 890 start_jiffies = jiffies; 891 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10, 892 500, jiffies_to_msecs(deadline - start_jiffies)); 893 894 if ((temp & 0xFF) != 0x18) { 895 ata_port_warn(ap, "No Signature Update\n"); 896 *class = ATA_DEV_NONE; 897 goto do_followup_srst; 898 } else { 899 ata_port_info(ap, "Signature Update detected @ %d msecs\n", 900 jiffies_to_msecs(jiffies - start_jiffies)); 901 *class = sata_fsl_dev_classify(ap); 902 return 0; 903 } 904 905 do_followup_srst: 906 /* 907 * request libATA to perform follow-up softreset 908 */ 909 return -EAGAIN; 910 911 err: 912 return -EIO; 913 } 914 915 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class, 916 unsigned long deadline) 917 { 918 struct ata_port *ap = link->ap; 919 struct sata_fsl_port_priv *pp = ap->private_data; 920 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 921 void __iomem *hcr_base = host_priv->hcr_base; 922 int pmp = sata_srst_pmp(link); 923 u32 temp; 924 struct ata_taskfile tf; 925 u8 *cfis; 926 u32 Serror; 927 928 if (ata_link_offline(link)) { 929 *class = ATA_DEV_NONE; 930 return 0; 931 } 932 933 /* 934 * Send a device reset (SRST) explicitly on command slot #0 935 * Check : will the command queue (reg) be cleared during offlining ?? 936 * Also we will be online only if Phy commn. has been established 937 * and device presence has been detected, therefore if we have 938 * reached here, we can send a command to the target device 939 */ 940 941 ata_tf_init(link->device, &tf); 942 cfis = (u8 *) &pp->cmdentry->cfis; 943 944 /* device reset/SRST is a control register update FIS, uses tag0 */ 945 sata_fsl_setup_cmd_hdr_entry(ap, pp, 0, 946 SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5); 947 948 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */ 949 ata_tf_to_fis(&tf, pmp, 0, cfis); 950 951 ata_port_dbg(ap, "Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n", 952 cfis[0], cfis[1], cfis[2], cfis[3]); 953 954 /* 955 * Queue SRST command to the controller/device, ensure that no 956 * other commands are active on the controller/device 957 */ 958 959 ata_port_dbg(ap, "CQ = 0x%x, CA = 0x%x, CC = 0x%x\n", 960 ioread32(CQ + hcr_base), 961 ioread32(CA + hcr_base), ioread32(CC + hcr_base)); 962 963 iowrite32(0xFFFF, CC + hcr_base); 964 if (pmp != SATA_PMP_CTRL_PORT) 965 iowrite32(pmp, CQPMP + hcr_base); 966 iowrite32(1, CQ + hcr_base); 967 968 temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000); 969 if (temp & 0x1) { 970 ata_port_warn(ap, "ATA_SRST issue failed\n"); 971 972 ata_port_dbg(ap, "Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n", 973 ioread32(CQ + hcr_base), 974 ioread32(CA + hcr_base), ioread32(CC + hcr_base)); 975 976 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror); 977 978 ata_port_dbg(ap, "HStatus = 0x%x HControl = 0x%x Serror = 0x%x\n", 979 ioread32(hcr_base + HSTATUS), 980 ioread32(hcr_base + HCONTROL), 981 Serror); 982 goto err; 983 } 984 985 ata_msleep(ap, 1); 986 987 /* 988 * SATA device enters reset state after receiving a Control register 989 * FIS with SRST bit asserted and it awaits another H2D Control reg. 990 * FIS with SRST bit cleared, then the device does internal diags & 991 * initialization, followed by indicating it's initialization status 992 * using ATA signature D2H register FIS to the host controller. 993 */ 994 995 sata_fsl_setup_cmd_hdr_entry(ap, pp, 0, 996 CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 997 0, 0, 5); 998 999 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */ 1000 ata_tf_to_fis(&tf, pmp, 0, cfis); 1001 1002 if (pmp != SATA_PMP_CTRL_PORT) 1003 iowrite32(pmp, CQPMP + hcr_base); 1004 iowrite32(1, CQ + hcr_base); 1005 ata_msleep(ap, 150); /* ?? */ 1006 1007 /* 1008 * The above command would have signalled an interrupt on command 1009 * complete, which needs special handling, by clearing the Nth 1010 * command bit of the CCreg 1011 */ 1012 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */ 1013 1014 *class = ATA_DEV_NONE; 1015 1016 /* Verify if SStatus indicates device presence */ 1017 if (ata_link_online(link)) { 1018 /* 1019 * if we are here, device presence has been detected, 1020 * 1st D2H FIS would have been received, but sfis in 1021 * command desc. is not updated, but signature register 1022 * would have been updated 1023 */ 1024 1025 *class = sata_fsl_dev_classify(ap); 1026 1027 ata_port_dbg(ap, "ccreg = 0x%x\n", ioread32(hcr_base + CC)); 1028 ata_port_dbg(ap, "cereg = 0x%x\n", ioread32(hcr_base + CE)); 1029 } 1030 1031 return 0; 1032 1033 err: 1034 return -EIO; 1035 } 1036 1037 static void sata_fsl_error_handler(struct ata_port *ap) 1038 { 1039 sata_pmp_error_handler(ap); 1040 } 1041 1042 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc) 1043 { 1044 if (qc->flags & ATA_QCFLAG_EH) 1045 qc->err_mask |= AC_ERR_OTHER; 1046 1047 if (qc->err_mask) { 1048 /* make DMA engine forget about the failed command */ 1049 1050 } 1051 } 1052 1053 static void sata_fsl_error_intr(struct ata_port *ap) 1054 { 1055 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 1056 void __iomem *hcr_base = host_priv->hcr_base; 1057 u32 hstatus, dereg=0, cereg = 0, SError = 0; 1058 unsigned int err_mask = 0, action = 0; 1059 int freeze = 0, abort=0; 1060 struct ata_link *link = NULL; 1061 struct ata_queued_cmd *qc = NULL; 1062 struct ata_eh_info *ehi; 1063 1064 hstatus = ioread32(hcr_base + HSTATUS); 1065 cereg = ioread32(hcr_base + CE); 1066 1067 /* first, analyze and record host port events */ 1068 link = &ap->link; 1069 ehi = &link->eh_info; 1070 ata_ehi_clear_desc(ehi); 1071 1072 /* 1073 * Handle & Clear SError 1074 */ 1075 1076 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); 1077 if (unlikely(SError & 0xFFFF0000)) 1078 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError); 1079 1080 ata_port_dbg(ap, "hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n", 1081 hstatus, cereg, ioread32(hcr_base + DE), SError); 1082 1083 /* handle fatal errors */ 1084 if (hstatus & FATAL_ERROR_DECODE) { 1085 ehi->err_mask |= AC_ERR_ATA_BUS; 1086 ehi->action |= ATA_EH_SOFTRESET; 1087 1088 freeze = 1; 1089 } 1090 1091 /* Handle SDB FIS receive & notify update */ 1092 if (hstatus & INT_ON_SNOTIFY_UPDATE) 1093 sata_async_notification(ap); 1094 1095 /* Handle PHYRDY change notification */ 1096 if (hstatus & INT_ON_PHYRDY_CHG) { 1097 ata_port_dbg(ap, "PHYRDY change indication\n"); 1098 1099 /* Setup a soft-reset EH action */ 1100 ata_ehi_hotplugged(ehi); 1101 ata_ehi_push_desc(ehi, "%s", "PHY RDY changed"); 1102 freeze = 1; 1103 } 1104 1105 /* handle single device errors */ 1106 if (cereg) { 1107 /* 1108 * clear the command error, also clears queue to the device 1109 * in error, and we can (re)issue commands to this device. 1110 * When a device is in error all commands queued into the 1111 * host controller and at the device are considered aborted 1112 * and the queue for that device is stopped. Now, after 1113 * clearing the device error, we can issue commands to the 1114 * device to interrogate it to find the source of the error. 1115 */ 1116 abort = 1; 1117 1118 ata_port_dbg(ap, "single device error, CE=0x%x, DE=0x%x\n", 1119 ioread32(hcr_base + CE), ioread32(hcr_base + DE)); 1120 1121 /* find out the offending link and qc */ 1122 if (ap->nr_pmp_links) { 1123 unsigned int dev_num; 1124 1125 dereg = ioread32(hcr_base + DE); 1126 iowrite32(dereg, hcr_base + DE); 1127 iowrite32(cereg, hcr_base + CE); 1128 1129 dev_num = ffs(dereg) - 1; 1130 if (dev_num < ap->nr_pmp_links && dereg != 0) { 1131 link = &ap->pmp_link[dev_num]; 1132 ehi = &link->eh_info; 1133 qc = ata_qc_from_tag(ap, link->active_tag); 1134 /* 1135 * We should consider this as non fatal error, 1136 * and TF must be updated as done below. 1137 */ 1138 1139 err_mask |= AC_ERR_DEV; 1140 1141 } else { 1142 err_mask |= AC_ERR_HSM; 1143 action |= ATA_EH_HARDRESET; 1144 freeze = 1; 1145 } 1146 } else { 1147 dereg = ioread32(hcr_base + DE); 1148 iowrite32(dereg, hcr_base + DE); 1149 iowrite32(cereg, hcr_base + CE); 1150 1151 qc = ata_qc_from_tag(ap, link->active_tag); 1152 /* 1153 * We should consider this as non fatal error, 1154 * and TF must be updated as done below. 1155 */ 1156 err_mask |= AC_ERR_DEV; 1157 } 1158 } 1159 1160 /* record error info */ 1161 if (qc) 1162 qc->err_mask |= err_mask; 1163 else 1164 ehi->err_mask |= err_mask; 1165 1166 ehi->action |= action; 1167 1168 /* freeze or abort */ 1169 if (freeze) 1170 ata_port_freeze(ap); 1171 else if (abort) { 1172 if (qc) 1173 ata_link_abort(qc->dev->link); 1174 else 1175 ata_port_abort(ap); 1176 } 1177 } 1178 1179 static void sata_fsl_host_intr(struct ata_port *ap) 1180 { 1181 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 1182 void __iomem *hcr_base = host_priv->hcr_base; 1183 u32 hstatus, done_mask = 0; 1184 struct ata_queued_cmd *qc; 1185 u32 SError; 1186 u32 tag; 1187 u32 status_mask = INT_ON_ERROR; 1188 1189 hstatus = ioread32(hcr_base + HSTATUS); 1190 1191 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); 1192 1193 /* Read command completed register */ 1194 done_mask = ioread32(hcr_base + CC); 1195 1196 /* Workaround for data length mismatch errata */ 1197 if (unlikely(hstatus & INT_ON_DATA_LENGTH_MISMATCH)) { 1198 ata_qc_for_each_with_internal(ap, qc, tag) { 1199 if (qc && ata_is_atapi(qc->tf.protocol)) { 1200 u32 hcontrol; 1201 /* Set HControl[27] to clear error registers */ 1202 hcontrol = ioread32(hcr_base + HCONTROL); 1203 iowrite32(hcontrol | CLEAR_ERROR, 1204 hcr_base + HCONTROL); 1205 1206 /* Clear HControl[27] */ 1207 iowrite32(hcontrol & ~CLEAR_ERROR, 1208 hcr_base + HCONTROL); 1209 1210 /* Clear SError[E] bit */ 1211 sata_fsl_scr_write(&ap->link, SCR_ERROR, 1212 SError); 1213 1214 /* Ignore fatal error and device error */ 1215 status_mask &= ~(INT_ON_SINGL_DEVICE_ERR 1216 | INT_ON_FATAL_ERR); 1217 break; 1218 } 1219 } 1220 } 1221 1222 if (unlikely(SError & 0xFFFF0000)) { 1223 ata_port_dbg(ap, "serror @host_intr : 0x%x\n", SError); 1224 sata_fsl_error_intr(ap); 1225 } 1226 1227 if (unlikely(hstatus & status_mask)) { 1228 ata_port_dbg(ap, "error interrupt!!\n"); 1229 sata_fsl_error_intr(ap); 1230 return; 1231 } 1232 1233 ata_port_dbg(ap, "Status of all queues :\n"); 1234 ata_port_dbg(ap, "done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%llx\n", 1235 done_mask, 1236 ioread32(hcr_base + CA), 1237 ioread32(hcr_base + CE), 1238 ioread32(hcr_base + CQ), 1239 ap->qc_active); 1240 1241 if (done_mask & ap->qc_active) { 1242 int i; 1243 /* clear CC bit, this will also complete the interrupt */ 1244 iowrite32(done_mask, hcr_base + CC); 1245 1246 ata_port_dbg(ap, "Status of all queues: done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n", 1247 done_mask, ioread32(hcr_base + CA), 1248 ioread32(hcr_base + CE)); 1249 1250 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) { 1251 if (done_mask & (1 << i)) 1252 ata_port_dbg(ap, "completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n", 1253 i, ioread32(hcr_base + CC), 1254 ioread32(hcr_base + CA)); 1255 } 1256 ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask); 1257 return; 1258 1259 } else if ((ap->qc_active & (1ULL << ATA_TAG_INTERNAL))) { 1260 iowrite32(1, hcr_base + CC); 1261 qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL); 1262 1263 ata_port_dbg(ap, "completing non-ncq cmd, CC=0x%x\n", 1264 ioread32(hcr_base + CC)); 1265 1266 if (qc) { 1267 ata_qc_complete(qc); 1268 } 1269 } else { 1270 /* Spurious Interrupt!! */ 1271 ata_port_dbg(ap, "spurious interrupt!!, CC = 0x%x\n", 1272 ioread32(hcr_base + CC)); 1273 iowrite32(done_mask, hcr_base + CC); 1274 return; 1275 } 1276 } 1277 1278 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance) 1279 { 1280 struct ata_host *host = dev_instance; 1281 struct sata_fsl_host_priv *host_priv = host->private_data; 1282 void __iomem *hcr_base = host_priv->hcr_base; 1283 u32 interrupt_enables; 1284 unsigned handled = 0; 1285 struct ata_port *ap; 1286 1287 /* ack. any pending IRQs for this controller/port */ 1288 interrupt_enables = ioread32(hcr_base + HSTATUS); 1289 interrupt_enables &= 0x3F; 1290 1291 if (!interrupt_enables) 1292 return IRQ_NONE; 1293 1294 spin_lock(&host->lock); 1295 1296 /* Assuming one port per host controller */ 1297 1298 ap = host->ports[0]; 1299 if (ap) { 1300 sata_fsl_host_intr(ap); 1301 } else { 1302 dev_warn(host->dev, "interrupt on disabled port 0\n"); 1303 } 1304 1305 iowrite32(interrupt_enables, hcr_base + HSTATUS); 1306 handled = 1; 1307 1308 spin_unlock(&host->lock); 1309 1310 return IRQ_RETVAL(handled); 1311 } 1312 1313 /* 1314 * Multiple ports are represented by multiple SATA controllers with 1315 * one port per controller 1316 */ 1317 static int sata_fsl_init_controller(struct ata_host *host) 1318 { 1319 struct sata_fsl_host_priv *host_priv = host->private_data; 1320 void __iomem *hcr_base = host_priv->hcr_base; 1321 u32 temp; 1322 1323 /* 1324 * NOTE : We cannot bring the controller online before setting 1325 * the CHBA, hence main controller initialization is done as 1326 * part of the port_start() callback 1327 */ 1328 1329 /* sata controller to operate in enterprise mode */ 1330 temp = ioread32(hcr_base + HCONTROL); 1331 iowrite32(temp & ~HCONTROL_LEGACY, hcr_base + HCONTROL); 1332 1333 /* ack. any pending IRQs for this controller/port */ 1334 temp = ioread32(hcr_base + HSTATUS); 1335 if (temp & 0x3F) 1336 iowrite32((temp & 0x3F), hcr_base + HSTATUS); 1337 1338 /* Keep interrupts disabled on the controller */ 1339 temp = ioread32(hcr_base + HCONTROL); 1340 iowrite32((temp & ~0x3F), hcr_base + HCONTROL); 1341 1342 /* Disable interrupt coalescing control(icc), for the moment */ 1343 dev_dbg(host->dev, "icc = 0x%x\n", ioread32(hcr_base + ICC)); 1344 iowrite32(0x01000000, hcr_base + ICC); 1345 1346 /* clear error registers, SError is cleared by libATA */ 1347 iowrite32(0x00000FFFF, hcr_base + CE); 1348 iowrite32(0x00000FFFF, hcr_base + DE); 1349 1350 /* 1351 * reset the number of command complete bits which will cause the 1352 * interrupt to be signaled 1353 */ 1354 fsl_sata_set_irq_coalescing(host, intr_coalescing_count, 1355 intr_coalescing_ticks); 1356 1357 /* 1358 * host controller will be brought on-line, during xx_port_start() 1359 * callback, that should also initiate the OOB, COMINIT sequence 1360 */ 1361 1362 dev_dbg(host->dev, "HStatus = 0x%x HControl = 0x%x\n", 1363 ioread32(hcr_base + HSTATUS), ioread32(hcr_base + HCONTROL)); 1364 1365 return 0; 1366 } 1367 1368 static void sata_fsl_host_stop(struct ata_host *host) 1369 { 1370 struct sata_fsl_host_priv *host_priv = host->private_data; 1371 1372 iounmap(host_priv->hcr_base); 1373 kfree(host_priv); 1374 } 1375 1376 /* 1377 * scsi mid-layer and libata interface structures 1378 */ 1379 static const struct scsi_host_template sata_fsl_sht = { 1380 ATA_NCQ_SHT_QD("sata_fsl", SATA_FSL_QUEUE_DEPTH), 1381 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE, 1382 .dma_boundary = ATA_DMA_BOUNDARY, 1383 }; 1384 1385 static struct ata_port_operations sata_fsl_ops = { 1386 .inherits = &sata_pmp_port_ops, 1387 1388 .qc_defer = ata_std_qc_defer, 1389 .qc_prep = sata_fsl_qc_prep, 1390 .qc_issue = sata_fsl_qc_issue, 1391 .qc_fill_rtf = sata_fsl_qc_fill_rtf, 1392 1393 .scr_read = sata_fsl_scr_read, 1394 .scr_write = sata_fsl_scr_write, 1395 1396 .freeze = sata_fsl_freeze, 1397 .thaw = sata_fsl_thaw, 1398 .softreset = sata_fsl_softreset, 1399 .hardreset = sata_fsl_hardreset, 1400 .pmp_softreset = sata_fsl_softreset, 1401 .error_handler = sata_fsl_error_handler, 1402 .post_internal_cmd = sata_fsl_post_internal_cmd, 1403 1404 .port_start = sata_fsl_port_start, 1405 .port_stop = sata_fsl_port_stop, 1406 1407 .host_stop = sata_fsl_host_stop, 1408 1409 .pmp_attach = sata_fsl_pmp_attach, 1410 .pmp_detach = sata_fsl_pmp_detach, 1411 }; 1412 1413 static const struct ata_port_info sata_fsl_port_info[] = { 1414 { 1415 .flags = SATA_FSL_HOST_FLAGS, 1416 .pio_mask = ATA_PIO4, 1417 .udma_mask = ATA_UDMA6, 1418 .port_ops = &sata_fsl_ops, 1419 }, 1420 }; 1421 1422 static int sata_fsl_probe(struct platform_device *ofdev) 1423 { 1424 int retval = -ENXIO; 1425 void __iomem *hcr_base = NULL; 1426 void __iomem *ssr_base = NULL; 1427 void __iomem *csr_base = NULL; 1428 struct sata_fsl_host_priv *host_priv = NULL; 1429 int irq; 1430 struct ata_host *host = NULL; 1431 u32 temp; 1432 1433 struct ata_port_info pi = sata_fsl_port_info[0]; 1434 const struct ata_port_info *ppi[] = { &pi, NULL }; 1435 1436 dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n"); 1437 1438 hcr_base = of_iomap(ofdev->dev.of_node, 0); 1439 if (!hcr_base) 1440 goto error_exit_with_cleanup; 1441 1442 ssr_base = hcr_base + 0x100; 1443 csr_base = hcr_base + 0x140; 1444 1445 if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) { 1446 temp = ioread32(csr_base + TRANSCFG); 1447 temp = temp & 0xffffffe0; 1448 iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG); 1449 } 1450 1451 dev_dbg(&ofdev->dev, "@reset i/o = 0x%x\n", 1452 ioread32(csr_base + TRANSCFG)); 1453 1454 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL); 1455 if (!host_priv) 1456 goto error_exit_with_cleanup; 1457 1458 host_priv->hcr_base = hcr_base; 1459 host_priv->ssr_base = ssr_base; 1460 host_priv->csr_base = csr_base; 1461 1462 irq = platform_get_irq(ofdev, 0); 1463 if (irq < 0) { 1464 retval = irq; 1465 goto error_exit_with_cleanup; 1466 } 1467 host_priv->irq = irq; 1468 1469 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2")) 1470 host_priv->data_snoop = DATA_SNOOP_ENABLE_V2; 1471 else 1472 host_priv->data_snoop = DATA_SNOOP_ENABLE_V1; 1473 1474 /* allocate host structure */ 1475 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS); 1476 if (!host) { 1477 retval = -ENOMEM; 1478 goto error_exit_with_cleanup; 1479 } 1480 1481 /* host->iomap is not used currently */ 1482 host->private_data = host_priv; 1483 1484 /* initialize host controller */ 1485 sata_fsl_init_controller(host); 1486 1487 /* 1488 * Now, register with libATA core, this will also initiate the 1489 * device discovery process, invoking our port_start() handler & 1490 * error_handler() to execute a dummy Softreset EH session 1491 */ 1492 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG, 1493 &sata_fsl_sht); 1494 1495 host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show; 1496 host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store; 1497 sysfs_attr_init(&host_priv->intr_coalescing.attr); 1498 host_priv->intr_coalescing.attr.name = "intr_coalescing"; 1499 host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR; 1500 retval = device_create_file(host->dev, &host_priv->intr_coalescing); 1501 if (retval) 1502 goto error_exit_with_cleanup; 1503 1504 host_priv->rx_watermark.show = fsl_sata_rx_watermark_show; 1505 host_priv->rx_watermark.store = fsl_sata_rx_watermark_store; 1506 sysfs_attr_init(&host_priv->rx_watermark.attr); 1507 host_priv->rx_watermark.attr.name = "rx_watermark"; 1508 host_priv->rx_watermark.attr.mode = S_IRUGO | S_IWUSR; 1509 retval = device_create_file(host->dev, &host_priv->rx_watermark); 1510 if (retval) { 1511 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing); 1512 goto error_exit_with_cleanup; 1513 } 1514 1515 return 0; 1516 1517 error_exit_with_cleanup: 1518 1519 if (host) 1520 ata_host_detach(host); 1521 1522 if (hcr_base) 1523 iounmap(hcr_base); 1524 kfree(host_priv); 1525 1526 return retval; 1527 } 1528 1529 static void sata_fsl_remove(struct platform_device *ofdev) 1530 { 1531 struct ata_host *host = platform_get_drvdata(ofdev); 1532 struct sata_fsl_host_priv *host_priv = host->private_data; 1533 1534 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing); 1535 device_remove_file(&ofdev->dev, &host_priv->rx_watermark); 1536 1537 ata_host_detach(host); 1538 } 1539 1540 #ifdef CONFIG_PM_SLEEP 1541 static int sata_fsl_suspend(struct platform_device *op, pm_message_t state) 1542 { 1543 struct ata_host *host = platform_get_drvdata(op); 1544 1545 ata_host_suspend(host, state); 1546 return 0; 1547 } 1548 1549 static int sata_fsl_resume(struct platform_device *op) 1550 { 1551 struct ata_host *host = platform_get_drvdata(op); 1552 struct sata_fsl_host_priv *host_priv = host->private_data; 1553 int ret; 1554 void __iomem *hcr_base = host_priv->hcr_base; 1555 struct ata_port *ap = host->ports[0]; 1556 struct sata_fsl_port_priv *pp = ap->private_data; 1557 1558 ret = sata_fsl_init_controller(host); 1559 if (ret) { 1560 dev_err(&op->dev, "Error initializing hardware\n"); 1561 return ret; 1562 } 1563 1564 /* Recovery the CHBA register in host controller cmd register set */ 1565 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA); 1566 1567 iowrite32((ioread32(hcr_base + HCONTROL) 1568 | HCONTROL_ONLINE_PHY_RST 1569 | HCONTROL_SNOOP_ENABLE 1570 | HCONTROL_PMP_ATTACHED), 1571 hcr_base + HCONTROL); 1572 1573 ata_host_resume(host); 1574 return 0; 1575 } 1576 #endif 1577 1578 static const struct of_device_id fsl_sata_match[] = { 1579 { .compatible = "fsl,pq-sata", }, 1580 { .compatible = "fsl,pq-sata-v2", }, 1581 { /* sentinel */ } 1582 }; 1583 1584 MODULE_DEVICE_TABLE(of, fsl_sata_match); 1585 1586 static struct platform_driver fsl_sata_driver = { 1587 .driver = { 1588 .name = "fsl-sata", 1589 .of_match_table = fsl_sata_match, 1590 }, 1591 .probe = sata_fsl_probe, 1592 .remove_new = sata_fsl_remove, 1593 #ifdef CONFIG_PM_SLEEP 1594 .suspend = sata_fsl_suspend, 1595 .resume = sata_fsl_resume, 1596 #endif 1597 }; 1598 1599 module_platform_driver(fsl_sata_driver); 1600 1601 MODULE_LICENSE("GPL"); 1602 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor"); 1603 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver"); 1604 MODULE_VERSION("1.10"); 1605