1 /* 2 * drivers/ata/sata_fsl.c 3 * 4 * Freescale 3.0Gbps SATA device driver 5 * 6 * Author: Ashish Kalra <ashish.kalra@freescale.com> 7 * Li Yang <leoli@freescale.com> 8 * 9 * Copyright (c) 2006-2007, 2011-2012 Freescale Semiconductor, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 * 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/slab.h> 22 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <linux/libata.h> 26 #include <asm/io.h> 27 #include <linux/of_address.h> 28 #include <linux/of_irq.h> 29 #include <linux/of_platform.h> 30 31 static unsigned int intr_coalescing_count; 32 module_param(intr_coalescing_count, int, S_IRUGO); 33 MODULE_PARM_DESC(intr_coalescing_count, 34 "INT coalescing count threshold (1..31)"); 35 36 static unsigned int intr_coalescing_ticks; 37 module_param(intr_coalescing_ticks, int, S_IRUGO); 38 MODULE_PARM_DESC(intr_coalescing_ticks, 39 "INT coalescing timer threshold in AHB ticks"); 40 /* Controller information */ 41 enum { 42 SATA_FSL_QUEUE_DEPTH = 16, 43 SATA_FSL_MAX_PRD = 63, 44 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1, 45 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */ 46 47 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | 48 ATA_FLAG_PMP | ATA_FLAG_NCQ | 49 ATA_FLAG_AN | ATA_FLAG_NO_LOG_PAGE), 50 51 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH, 52 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */ 53 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE), 54 55 /* 56 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and 57 * chained indirect PRDEs up to a max count of 63. 58 * We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will 59 * be setup as an indirect descriptor, pointing to it's next 60 * (contiguous) PRDE. Though chained indirect PRDE arrays are 61 * supported,it will be more efficient to use a direct PRDT and 62 * a single chain/link to indirect PRDE array/PRDT. 63 */ 64 65 SATA_FSL_CMD_DESC_CFIS_SZ = 32, 66 SATA_FSL_CMD_DESC_SFIS_SZ = 32, 67 SATA_FSL_CMD_DESC_ACMD_SZ = 16, 68 SATA_FSL_CMD_DESC_RSRVD = 16, 69 70 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ + 71 SATA_FSL_CMD_DESC_SFIS_SZ + 72 SATA_FSL_CMD_DESC_ACMD_SZ + 73 SATA_FSL_CMD_DESC_RSRVD + 74 SATA_FSL_MAX_PRD * 16), 75 76 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT = 77 (SATA_FSL_CMD_DESC_CFIS_SZ + 78 SATA_FSL_CMD_DESC_SFIS_SZ + 79 SATA_FSL_CMD_DESC_ACMD_SZ + 80 SATA_FSL_CMD_DESC_RSRVD), 81 82 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS), 83 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE + 84 SATA_FSL_CMD_DESC_AR_SZ), 85 86 /* 87 * MPC8315 has two SATA controllers, SATA1 & SATA2 88 * (one port per controller) 89 * MPC837x has 2/4 controllers, one port per controller 90 */ 91 92 SATA_FSL_MAX_PORTS = 1, 93 94 SATA_FSL_IRQ_FLAG = IRQF_SHARED, 95 }; 96 97 /* 98 * Interrupt Coalescing Control Register bitdefs */ 99 enum { 100 ICC_MIN_INT_COUNT_THRESHOLD = 1, 101 ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1), 102 ICC_MIN_INT_TICKS_THRESHOLD = 0, 103 ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1), 104 ICC_SAFE_INT_TICKS = 1, 105 }; 106 107 /* 108 * Host Controller command register set - per port 109 */ 110 enum { 111 CQ = 0, 112 CA = 8, 113 CC = 0x10, 114 CE = 0x18, 115 DE = 0x20, 116 CHBA = 0x24, 117 HSTATUS = 0x28, 118 HCONTROL = 0x2C, 119 CQPMP = 0x30, 120 SIGNATURE = 0x34, 121 ICC = 0x38, 122 123 /* 124 * Host Status Register (HStatus) bitdefs 125 */ 126 ONLINE = (1 << 31), 127 GOING_OFFLINE = (1 << 30), 128 BIST_ERR = (1 << 29), 129 CLEAR_ERROR = (1 << 27), 130 131 FATAL_ERR_HC_MASTER_ERR = (1 << 18), 132 FATAL_ERR_PARITY_ERR_TX = (1 << 17), 133 FATAL_ERR_PARITY_ERR_RX = (1 << 16), 134 FATAL_ERR_DATA_UNDERRUN = (1 << 13), 135 FATAL_ERR_DATA_OVERRUN = (1 << 12), 136 FATAL_ERR_CRC_ERR_TX = (1 << 11), 137 FATAL_ERR_CRC_ERR_RX = (1 << 10), 138 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9), 139 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8), 140 141 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR | 142 FATAL_ERR_PARITY_ERR_TX | 143 FATAL_ERR_PARITY_ERR_RX | 144 FATAL_ERR_DATA_UNDERRUN | 145 FATAL_ERR_DATA_OVERRUN | 146 FATAL_ERR_CRC_ERR_TX | 147 FATAL_ERR_CRC_ERR_RX | 148 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX, 149 150 INT_ON_DATA_LENGTH_MISMATCH = (1 << 12), 151 INT_ON_FATAL_ERR = (1 << 5), 152 INT_ON_PHYRDY_CHG = (1 << 4), 153 154 INT_ON_SIGNATURE_UPDATE = (1 << 3), 155 INT_ON_SNOTIFY_UPDATE = (1 << 2), 156 INT_ON_SINGL_DEVICE_ERR = (1 << 1), 157 INT_ON_CMD_COMPLETE = 1, 158 159 INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE | 160 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR, 161 162 /* 163 * Host Control Register (HControl) bitdefs 164 */ 165 HCONTROL_ONLINE_PHY_RST = (1 << 31), 166 HCONTROL_FORCE_OFFLINE = (1 << 30), 167 HCONTROL_LEGACY = (1 << 28), 168 HCONTROL_PARITY_PROT_MOD = (1 << 14), 169 HCONTROL_DPATH_PARITY = (1 << 12), 170 HCONTROL_SNOOP_ENABLE = (1 << 10), 171 HCONTROL_PMP_ATTACHED = (1 << 9), 172 HCONTROL_COPYOUT_STATFIS = (1 << 8), 173 IE_ON_FATAL_ERR = (1 << 5), 174 IE_ON_PHYRDY_CHG = (1 << 4), 175 IE_ON_SIGNATURE_UPDATE = (1 << 3), 176 IE_ON_SNOTIFY_UPDATE = (1 << 2), 177 IE_ON_SINGL_DEVICE_ERR = (1 << 1), 178 IE_ON_CMD_COMPLETE = 1, 179 180 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG | 181 IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE | 182 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE, 183 184 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31), 185 DATA_SNOOP_ENABLE_V1 = (1 << 22), 186 DATA_SNOOP_ENABLE_V2 = (1 << 28), 187 }; 188 189 /* 190 * SATA Superset Registers 191 */ 192 enum { 193 SSTATUS = 0, 194 SERROR = 4, 195 SCONTROL = 8, 196 SNOTIFY = 0xC, 197 }; 198 199 /* 200 * Control Status Register Set 201 */ 202 enum { 203 TRANSCFG = 0, 204 TRANSSTATUS = 4, 205 LINKCFG = 8, 206 LINKCFG1 = 0xC, 207 LINKCFG2 = 0x10, 208 LINKSTATUS = 0x14, 209 LINKSTATUS1 = 0x18, 210 PHYCTRLCFG = 0x1C, 211 COMMANDSTAT = 0x20, 212 }; 213 214 /* TRANSCFG (transport-layer) configuration control */ 215 enum { 216 TRANSCFG_RX_WATER_MARK = (1 << 4), 217 }; 218 219 /* PHY (link-layer) configuration control */ 220 enum { 221 PHY_BIST_ENABLE = 0x01, 222 }; 223 224 /* 225 * Command Header Table entry, i.e, command slot 226 * 4 Dwords per command slot, command header size == 64 Dwords. 227 */ 228 struct cmdhdr_tbl_entry { 229 u32 cda; 230 u32 prde_fis_len; 231 u32 ttl; 232 u32 desc_info; 233 }; 234 235 /* 236 * Description information bitdefs 237 */ 238 enum { 239 CMD_DESC_RES = (1 << 11), 240 VENDOR_SPECIFIC_BIST = (1 << 10), 241 CMD_DESC_SNOOP_ENABLE = (1 << 9), 242 FPDMA_QUEUED_CMD = (1 << 8), 243 SRST_CMD = (1 << 7), 244 BIST = (1 << 6), 245 ATAPI_CMD = (1 << 5), 246 }; 247 248 /* 249 * Command Descriptor 250 */ 251 struct command_desc { 252 u8 cfis[8 * 4]; 253 u8 sfis[8 * 4]; 254 u8 acmd[4 * 4]; 255 u8 fill[4 * 4]; 256 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4]; 257 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4]; 258 }; 259 260 /* 261 * Physical region table descriptor(PRD) 262 */ 263 264 struct prde { 265 u32 dba; 266 u8 fill[2 * 4]; 267 u32 ddc_and_ext; 268 }; 269 270 /* 271 * ata_port private data 272 * This is our per-port instance data. 273 */ 274 struct sata_fsl_port_priv { 275 struct cmdhdr_tbl_entry *cmdslot; 276 dma_addr_t cmdslot_paddr; 277 struct command_desc *cmdentry; 278 dma_addr_t cmdentry_paddr; 279 }; 280 281 /* 282 * ata_port->host_set private data 283 */ 284 struct sata_fsl_host_priv { 285 void __iomem *hcr_base; 286 void __iomem *ssr_base; 287 void __iomem *csr_base; 288 int irq; 289 int data_snoop; 290 struct device_attribute intr_coalescing; 291 struct device_attribute rx_watermark; 292 }; 293 294 static void fsl_sata_set_irq_coalescing(struct ata_host *host, 295 unsigned int count, unsigned int ticks) 296 { 297 struct sata_fsl_host_priv *host_priv = host->private_data; 298 void __iomem *hcr_base = host_priv->hcr_base; 299 unsigned long flags; 300 301 if (count > ICC_MAX_INT_COUNT_THRESHOLD) 302 count = ICC_MAX_INT_COUNT_THRESHOLD; 303 else if (count < ICC_MIN_INT_COUNT_THRESHOLD) 304 count = ICC_MIN_INT_COUNT_THRESHOLD; 305 306 if (ticks > ICC_MAX_INT_TICKS_THRESHOLD) 307 ticks = ICC_MAX_INT_TICKS_THRESHOLD; 308 else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) && 309 (count > ICC_MIN_INT_COUNT_THRESHOLD)) 310 ticks = ICC_SAFE_INT_TICKS; 311 312 spin_lock_irqsave(&host->lock, flags); 313 iowrite32((count << 24 | ticks), hcr_base + ICC); 314 315 intr_coalescing_count = count; 316 intr_coalescing_ticks = ticks; 317 spin_unlock_irqrestore(&host->lock, flags); 318 319 DPRINTK("interrupt coalescing, count = 0x%x, ticks = %x\n", 320 intr_coalescing_count, intr_coalescing_ticks); 321 DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n", 322 hcr_base, ioread32(hcr_base + ICC)); 323 } 324 325 static ssize_t fsl_sata_intr_coalescing_show(struct device *dev, 326 struct device_attribute *attr, char *buf) 327 { 328 return sprintf(buf, "%d %d\n", 329 intr_coalescing_count, intr_coalescing_ticks); 330 } 331 332 static ssize_t fsl_sata_intr_coalescing_store(struct device *dev, 333 struct device_attribute *attr, 334 const char *buf, size_t count) 335 { 336 unsigned int coalescing_count, coalescing_ticks; 337 338 if (sscanf(buf, "%d%d", 339 &coalescing_count, 340 &coalescing_ticks) != 2) { 341 printk(KERN_ERR "fsl-sata: wrong parameter format.\n"); 342 return -EINVAL; 343 } 344 345 fsl_sata_set_irq_coalescing(dev_get_drvdata(dev), 346 coalescing_count, coalescing_ticks); 347 348 return strlen(buf); 349 } 350 351 static ssize_t fsl_sata_rx_watermark_show(struct device *dev, 352 struct device_attribute *attr, char *buf) 353 { 354 unsigned int rx_watermark; 355 unsigned long flags; 356 struct ata_host *host = dev_get_drvdata(dev); 357 struct sata_fsl_host_priv *host_priv = host->private_data; 358 void __iomem *csr_base = host_priv->csr_base; 359 360 spin_lock_irqsave(&host->lock, flags); 361 rx_watermark = ioread32(csr_base + TRANSCFG); 362 rx_watermark &= 0x1f; 363 364 spin_unlock_irqrestore(&host->lock, flags); 365 return sprintf(buf, "%d\n", rx_watermark); 366 } 367 368 static ssize_t fsl_sata_rx_watermark_store(struct device *dev, 369 struct device_attribute *attr, 370 const char *buf, size_t count) 371 { 372 unsigned int rx_watermark; 373 unsigned long flags; 374 struct ata_host *host = dev_get_drvdata(dev); 375 struct sata_fsl_host_priv *host_priv = host->private_data; 376 void __iomem *csr_base = host_priv->csr_base; 377 u32 temp; 378 379 if (sscanf(buf, "%d", &rx_watermark) != 1) { 380 printk(KERN_ERR "fsl-sata: wrong parameter format.\n"); 381 return -EINVAL; 382 } 383 384 spin_lock_irqsave(&host->lock, flags); 385 temp = ioread32(csr_base + TRANSCFG); 386 temp &= 0xffffffe0; 387 iowrite32(temp | rx_watermark, csr_base + TRANSCFG); 388 389 spin_unlock_irqrestore(&host->lock, flags); 390 return strlen(buf); 391 } 392 393 static inline unsigned int sata_fsl_tag(unsigned int tag, 394 void __iomem *hcr_base) 395 { 396 /* We let libATA core do actual (queue) tag allocation */ 397 398 /* all non NCQ/queued commands should have tag#0 */ 399 if (ata_tag_internal(tag)) { 400 DPRINTK("mapping internal cmds to tag#0\n"); 401 return 0; 402 } 403 404 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) { 405 DPRINTK("tag %d invalid : out of range\n", tag); 406 return 0; 407 } 408 409 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) { 410 DPRINTK("tag %d invalid : in use!!\n", tag); 411 return 0; 412 } 413 414 return tag; 415 } 416 417 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp, 418 unsigned int tag, u32 desc_info, 419 u32 data_xfer_len, u8 num_prde, 420 u8 fis_len) 421 { 422 dma_addr_t cmd_descriptor_address; 423 424 cmd_descriptor_address = pp->cmdentry_paddr + 425 tag * SATA_FSL_CMD_DESC_SIZE; 426 427 /* NOTE: both data_xfer_len & fis_len are Dword counts */ 428 429 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address); 430 pp->cmdslot[tag].prde_fis_len = 431 cpu_to_le32((num_prde << 16) | (fis_len << 2)); 432 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03); 433 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F)); 434 435 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n", 436 pp->cmdslot[tag].cda, 437 pp->cmdslot[tag].prde_fis_len, 438 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info); 439 440 } 441 442 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc, 443 u32 *ttl, dma_addr_t cmd_desc_paddr, 444 int data_snoop) 445 { 446 struct scatterlist *sg; 447 unsigned int num_prde = 0; 448 u32 ttl_dwords = 0; 449 450 /* 451 * NOTE : direct & indirect prdt's are contiguously allocated 452 */ 453 struct prde *prd = (struct prde *)&((struct command_desc *) 454 cmd_desc)->prdt; 455 456 struct prde *prd_ptr_to_indirect_ext = NULL; 457 unsigned indirect_ext_segment_sz = 0; 458 dma_addr_t indirect_ext_segment_paddr; 459 unsigned int si; 460 461 VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd); 462 463 indirect_ext_segment_paddr = cmd_desc_paddr + 464 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16; 465 466 for_each_sg(qc->sg, sg, qc->n_elem, si) { 467 dma_addr_t sg_addr = sg_dma_address(sg); 468 u32 sg_len = sg_dma_len(sg); 469 470 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n", 471 (unsigned long long)sg_addr, sg_len); 472 473 /* warn if each s/g element is not dword aligned */ 474 if (unlikely(sg_addr & 0x03)) 475 ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n", 476 (unsigned long long)sg_addr); 477 if (unlikely(sg_len & 0x03)) 478 ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n", 479 sg_len); 480 481 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) && 482 sg_next(sg) != NULL) { 483 VPRINTK("setting indirect prde\n"); 484 prd_ptr_to_indirect_ext = prd; 485 prd->dba = cpu_to_le32(indirect_ext_segment_paddr); 486 indirect_ext_segment_sz = 0; 487 ++prd; 488 ++num_prde; 489 } 490 491 ttl_dwords += sg_len; 492 prd->dba = cpu_to_le32(sg_addr); 493 prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03)); 494 495 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n", 496 ttl_dwords, prd->dba, prd->ddc_and_ext); 497 498 ++num_prde; 499 ++prd; 500 if (prd_ptr_to_indirect_ext) 501 indirect_ext_segment_sz += sg_len; 502 } 503 504 if (prd_ptr_to_indirect_ext) { 505 /* set indirect extension flag along with indirect ext. size */ 506 prd_ptr_to_indirect_ext->ddc_and_ext = 507 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG | 508 data_snoop | 509 (indirect_ext_segment_sz & ~0x03))); 510 } 511 512 *ttl = ttl_dwords; 513 return num_prde; 514 } 515 516 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc) 517 { 518 struct ata_port *ap = qc->ap; 519 struct sata_fsl_port_priv *pp = ap->private_data; 520 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 521 void __iomem *hcr_base = host_priv->hcr_base; 522 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); 523 struct command_desc *cd; 524 u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE; 525 u32 num_prde = 0; 526 u32 ttl_dwords = 0; 527 dma_addr_t cd_paddr; 528 529 cd = (struct command_desc *)pp->cmdentry + tag; 530 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE; 531 532 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis); 533 534 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n", 535 cd->cfis[0], cd->cfis[1], cd->cfis[2]); 536 537 if (qc->tf.protocol == ATA_PROT_NCQ) { 538 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n", 539 cd->cfis[3], cd->cfis[11]); 540 } 541 542 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */ 543 if (ata_is_atapi(qc->tf.protocol)) { 544 desc_info |= ATAPI_CMD; 545 memset((void *)&cd->acmd, 0, 32); 546 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len); 547 } 548 549 if (qc->flags & ATA_QCFLAG_DMAMAP) 550 num_prde = sata_fsl_fill_sg(qc, (void *)cd, 551 &ttl_dwords, cd_paddr, 552 host_priv->data_snoop); 553 554 if (qc->tf.protocol == ATA_PROT_NCQ) 555 desc_info |= FPDMA_QUEUED_CMD; 556 557 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords, 558 num_prde, 5); 559 560 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n", 561 desc_info, ttl_dwords, num_prde); 562 } 563 564 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc) 565 { 566 struct ata_port *ap = qc->ap; 567 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 568 void __iomem *hcr_base = host_priv->hcr_base; 569 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); 570 571 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n", 572 ioread32(CQ + hcr_base), 573 ioread32(CA + hcr_base), 574 ioread32(CE + hcr_base), ioread32(CC + hcr_base)); 575 576 iowrite32(qc->dev->link->pmp, CQPMP + hcr_base); 577 578 /* Simply queue command to the controller/device */ 579 iowrite32(1 << tag, CQ + hcr_base); 580 581 VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n", 582 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base)); 583 584 VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n", 585 ioread32(CE + hcr_base), 586 ioread32(DE + hcr_base), 587 ioread32(CC + hcr_base), 588 ioread32(COMMANDSTAT + host_priv->csr_base)); 589 590 return 0; 591 } 592 593 static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc) 594 { 595 struct sata_fsl_port_priv *pp = qc->ap->private_data; 596 struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data; 597 void __iomem *hcr_base = host_priv->hcr_base; 598 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); 599 struct command_desc *cd; 600 601 cd = pp->cmdentry + tag; 602 603 ata_tf_from_fis(cd->sfis, &qc->result_tf); 604 return true; 605 } 606 607 static int sata_fsl_scr_write(struct ata_link *link, 608 unsigned int sc_reg_in, u32 val) 609 { 610 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; 611 void __iomem *ssr_base = host_priv->ssr_base; 612 unsigned int sc_reg; 613 614 switch (sc_reg_in) { 615 case SCR_STATUS: 616 case SCR_ERROR: 617 case SCR_CONTROL: 618 case SCR_ACTIVE: 619 sc_reg = sc_reg_in; 620 break; 621 default: 622 return -EINVAL; 623 } 624 625 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg); 626 627 iowrite32(val, ssr_base + (sc_reg * 4)); 628 return 0; 629 } 630 631 static int sata_fsl_scr_read(struct ata_link *link, 632 unsigned int sc_reg_in, u32 *val) 633 { 634 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; 635 void __iomem *ssr_base = host_priv->ssr_base; 636 unsigned int sc_reg; 637 638 switch (sc_reg_in) { 639 case SCR_STATUS: 640 case SCR_ERROR: 641 case SCR_CONTROL: 642 case SCR_ACTIVE: 643 sc_reg = sc_reg_in; 644 break; 645 default: 646 return -EINVAL; 647 } 648 649 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg); 650 651 *val = ioread32(ssr_base + (sc_reg * 4)); 652 return 0; 653 } 654 655 static void sata_fsl_freeze(struct ata_port *ap) 656 { 657 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 658 void __iomem *hcr_base = host_priv->hcr_base; 659 u32 temp; 660 661 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n", 662 ioread32(CQ + hcr_base), 663 ioread32(CA + hcr_base), 664 ioread32(CE + hcr_base), ioread32(DE + hcr_base)); 665 VPRINTK("CmdStat = 0x%x\n", 666 ioread32(host_priv->csr_base + COMMANDSTAT)); 667 668 /* disable interrupts on the controller/port */ 669 temp = ioread32(hcr_base + HCONTROL); 670 iowrite32((temp & ~0x3F), hcr_base + HCONTROL); 671 672 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n", 673 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); 674 } 675 676 static void sata_fsl_thaw(struct ata_port *ap) 677 { 678 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 679 void __iomem *hcr_base = host_priv->hcr_base; 680 u32 temp; 681 682 /* ack. any pending IRQs for this controller/port */ 683 temp = ioread32(hcr_base + HSTATUS); 684 685 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F)); 686 687 if (temp & 0x3F) 688 iowrite32((temp & 0x3F), hcr_base + HSTATUS); 689 690 /* enable interrupts on the controller/port */ 691 temp = ioread32(hcr_base + HCONTROL); 692 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL); 693 694 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n", 695 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); 696 } 697 698 static void sata_fsl_pmp_attach(struct ata_port *ap) 699 { 700 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 701 void __iomem *hcr_base = host_priv->hcr_base; 702 u32 temp; 703 704 temp = ioread32(hcr_base + HCONTROL); 705 iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL); 706 } 707 708 static void sata_fsl_pmp_detach(struct ata_port *ap) 709 { 710 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 711 void __iomem *hcr_base = host_priv->hcr_base; 712 u32 temp; 713 714 temp = ioread32(hcr_base + HCONTROL); 715 temp &= ~HCONTROL_PMP_ATTACHED; 716 iowrite32(temp, hcr_base + HCONTROL); 717 718 /* enable interrupts on the controller/port */ 719 temp = ioread32(hcr_base + HCONTROL); 720 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL); 721 722 } 723 724 static int sata_fsl_port_start(struct ata_port *ap) 725 { 726 struct device *dev = ap->host->dev; 727 struct sata_fsl_port_priv *pp; 728 void *mem; 729 dma_addr_t mem_dma; 730 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 731 void __iomem *hcr_base = host_priv->hcr_base; 732 u32 temp; 733 734 pp = kzalloc(sizeof(*pp), GFP_KERNEL); 735 if (!pp) 736 return -ENOMEM; 737 738 mem = dma_zalloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma, 739 GFP_KERNEL); 740 if (!mem) { 741 kfree(pp); 742 return -ENOMEM; 743 } 744 745 pp->cmdslot = mem; 746 pp->cmdslot_paddr = mem_dma; 747 748 mem += SATA_FSL_CMD_SLOT_SIZE; 749 mem_dma += SATA_FSL_CMD_SLOT_SIZE; 750 751 pp->cmdentry = mem; 752 pp->cmdentry_paddr = mem_dma; 753 754 ap->private_data = pp; 755 756 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n", 757 pp->cmdslot_paddr, pp->cmdentry_paddr); 758 759 /* Now, update the CHBA register in host controller cmd register set */ 760 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA); 761 762 /* 763 * Now, we can bring the controller on-line & also initiate 764 * the COMINIT sequence, we simply return here and the boot-probing 765 * & device discovery process is re-initiated by libATA using a 766 * Softreset EH (dummy) session. Hence, boot probing and device 767 * discovey will be part of sata_fsl_softreset() callback. 768 */ 769 770 temp = ioread32(hcr_base + HCONTROL); 771 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL); 772 773 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 774 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 775 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA)); 776 777 return 0; 778 } 779 780 static void sata_fsl_port_stop(struct ata_port *ap) 781 { 782 struct device *dev = ap->host->dev; 783 struct sata_fsl_port_priv *pp = ap->private_data; 784 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 785 void __iomem *hcr_base = host_priv->hcr_base; 786 u32 temp; 787 788 /* 789 * Force host controller to go off-line, aborting current operations 790 */ 791 temp = ioread32(hcr_base + HCONTROL); 792 temp &= ~HCONTROL_ONLINE_PHY_RST; 793 temp |= HCONTROL_FORCE_OFFLINE; 794 iowrite32(temp, hcr_base + HCONTROL); 795 796 /* Poll for controller to go offline - should happen immediately */ 797 ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1); 798 799 ap->private_data = NULL; 800 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, 801 pp->cmdslot, pp->cmdslot_paddr); 802 803 kfree(pp); 804 } 805 806 static unsigned int sata_fsl_dev_classify(struct ata_port *ap) 807 { 808 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 809 void __iomem *hcr_base = host_priv->hcr_base; 810 struct ata_taskfile tf; 811 u32 temp; 812 813 temp = ioread32(hcr_base + SIGNATURE); 814 815 VPRINTK("raw sig = 0x%x\n", temp); 816 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 817 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 818 819 tf.lbah = (temp >> 24) & 0xff; 820 tf.lbam = (temp >> 16) & 0xff; 821 tf.lbal = (temp >> 8) & 0xff; 822 tf.nsect = temp & 0xff; 823 824 return ata_dev_classify(&tf); 825 } 826 827 static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class, 828 unsigned long deadline) 829 { 830 struct ata_port *ap = link->ap; 831 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 832 void __iomem *hcr_base = host_priv->hcr_base; 833 u32 temp; 834 int i = 0; 835 unsigned long start_jiffies; 836 837 DPRINTK("in xx_hardreset\n"); 838 839 try_offline_again: 840 /* 841 * Force host controller to go off-line, aborting current operations 842 */ 843 temp = ioread32(hcr_base + HCONTROL); 844 temp &= ~HCONTROL_ONLINE_PHY_RST; 845 iowrite32(temp, hcr_base + HCONTROL); 846 847 /* Poll for controller to go offline */ 848 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 849 1, 500); 850 851 if (temp & ONLINE) { 852 ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i); 853 854 /* 855 * Try to offline controller atleast twice 856 */ 857 i++; 858 if (i == 2) 859 goto err; 860 else 861 goto try_offline_again; 862 } 863 864 DPRINTK("hardreset, controller off-lined\n"); 865 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 866 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 867 868 /* 869 * PHY reset should remain asserted for atleast 1ms 870 */ 871 ata_msleep(ap, 1); 872 873 sata_set_spd(link); 874 875 /* 876 * Now, bring the host controller online again, this can take time 877 * as PHY reset and communication establishment, 1st D2H FIS and 878 * device signature update is done, on safe side assume 500ms 879 * NOTE : Host online status may be indicated immediately!! 880 */ 881 882 temp = ioread32(hcr_base + HCONTROL); 883 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE); 884 temp |= HCONTROL_PMP_ATTACHED; 885 iowrite32(temp, hcr_base + HCONTROL); 886 887 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500); 888 889 if (!(temp & ONLINE)) { 890 ata_port_err(ap, "Hardreset failed, not on-lined\n"); 891 goto err; 892 } 893 894 DPRINTK("hardreset, controller off-lined & on-lined\n"); 895 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 896 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 897 898 /* 899 * First, wait for the PHYRDY change to occur before waiting for 900 * the signature, and also verify if SStatus indicates device 901 * presence 902 */ 903 904 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500); 905 if ((!(temp & 0x10)) || ata_link_offline(link)) { 906 ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n", 907 ioread32(hcr_base + HSTATUS)); 908 *class = ATA_DEV_NONE; 909 return 0; 910 } 911 912 /* 913 * Wait for the first D2H from device,i.e,signature update notification 914 */ 915 start_jiffies = jiffies; 916 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10, 917 500, jiffies_to_msecs(deadline - start_jiffies)); 918 919 if ((temp & 0xFF) != 0x18) { 920 ata_port_warn(ap, "No Signature Update\n"); 921 *class = ATA_DEV_NONE; 922 goto do_followup_srst; 923 } else { 924 ata_port_info(ap, "Signature Update detected @ %d msecs\n", 925 jiffies_to_msecs(jiffies - start_jiffies)); 926 *class = sata_fsl_dev_classify(ap); 927 return 0; 928 } 929 930 do_followup_srst: 931 /* 932 * request libATA to perform follow-up softreset 933 */ 934 return -EAGAIN; 935 936 err: 937 return -EIO; 938 } 939 940 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class, 941 unsigned long deadline) 942 { 943 struct ata_port *ap = link->ap; 944 struct sata_fsl_port_priv *pp = ap->private_data; 945 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 946 void __iomem *hcr_base = host_priv->hcr_base; 947 int pmp = sata_srst_pmp(link); 948 u32 temp; 949 struct ata_taskfile tf; 950 u8 *cfis; 951 u32 Serror; 952 953 DPRINTK("in xx_softreset\n"); 954 955 if (ata_link_offline(link)) { 956 DPRINTK("PHY reports no device\n"); 957 *class = ATA_DEV_NONE; 958 return 0; 959 } 960 961 /* 962 * Send a device reset (SRST) explicitly on command slot #0 963 * Check : will the command queue (reg) be cleared during offlining ?? 964 * Also we will be online only if Phy commn. has been established 965 * and device presence has been detected, therefore if we have 966 * reached here, we can send a command to the target device 967 */ 968 969 DPRINTK("Sending SRST/device reset\n"); 970 971 ata_tf_init(link->device, &tf); 972 cfis = (u8 *) &pp->cmdentry->cfis; 973 974 /* device reset/SRST is a control register update FIS, uses tag0 */ 975 sata_fsl_setup_cmd_hdr_entry(pp, 0, 976 SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5); 977 978 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */ 979 ata_tf_to_fis(&tf, pmp, 0, cfis); 980 981 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n", 982 cfis[0], cfis[1], cfis[2], cfis[3]); 983 984 /* 985 * Queue SRST command to the controller/device, ensure that no 986 * other commands are active on the controller/device 987 */ 988 989 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n", 990 ioread32(CQ + hcr_base), 991 ioread32(CA + hcr_base), ioread32(CC + hcr_base)); 992 993 iowrite32(0xFFFF, CC + hcr_base); 994 if (pmp != SATA_PMP_CTRL_PORT) 995 iowrite32(pmp, CQPMP + hcr_base); 996 iowrite32(1, CQ + hcr_base); 997 998 temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000); 999 if (temp & 0x1) { 1000 ata_port_warn(ap, "ATA_SRST issue failed\n"); 1001 1002 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n", 1003 ioread32(CQ + hcr_base), 1004 ioread32(CA + hcr_base), ioread32(CC + hcr_base)); 1005 1006 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror); 1007 1008 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 1009 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 1010 DPRINTK("Serror = 0x%x\n", Serror); 1011 goto err; 1012 } 1013 1014 ata_msleep(ap, 1); 1015 1016 /* 1017 * SATA device enters reset state after receiving a Control register 1018 * FIS with SRST bit asserted and it awaits another H2D Control reg. 1019 * FIS with SRST bit cleared, then the device does internal diags & 1020 * initialization, followed by indicating it's initialization status 1021 * using ATA signature D2H register FIS to the host controller. 1022 */ 1023 1024 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 1025 0, 0, 5); 1026 1027 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */ 1028 ata_tf_to_fis(&tf, pmp, 0, cfis); 1029 1030 if (pmp != SATA_PMP_CTRL_PORT) 1031 iowrite32(pmp, CQPMP + hcr_base); 1032 iowrite32(1, CQ + hcr_base); 1033 ata_msleep(ap, 150); /* ?? */ 1034 1035 /* 1036 * The above command would have signalled an interrupt on command 1037 * complete, which needs special handling, by clearing the Nth 1038 * command bit of the CCreg 1039 */ 1040 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */ 1041 1042 DPRINTK("SATA FSL : Now checking device signature\n"); 1043 1044 *class = ATA_DEV_NONE; 1045 1046 /* Verify if SStatus indicates device presence */ 1047 if (ata_link_online(link)) { 1048 /* 1049 * if we are here, device presence has been detected, 1050 * 1st D2H FIS would have been received, but sfis in 1051 * command desc. is not updated, but signature register 1052 * would have been updated 1053 */ 1054 1055 *class = sata_fsl_dev_classify(ap); 1056 1057 DPRINTK("class = %d\n", *class); 1058 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC)); 1059 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE)); 1060 } 1061 1062 return 0; 1063 1064 err: 1065 return -EIO; 1066 } 1067 1068 static void sata_fsl_error_handler(struct ata_port *ap) 1069 { 1070 1071 DPRINTK("in xx_error_handler\n"); 1072 sata_pmp_error_handler(ap); 1073 1074 } 1075 1076 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc) 1077 { 1078 if (qc->flags & ATA_QCFLAG_FAILED) 1079 qc->err_mask |= AC_ERR_OTHER; 1080 1081 if (qc->err_mask) { 1082 /* make DMA engine forget about the failed command */ 1083 1084 } 1085 } 1086 1087 static void sata_fsl_error_intr(struct ata_port *ap) 1088 { 1089 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 1090 void __iomem *hcr_base = host_priv->hcr_base; 1091 u32 hstatus, dereg=0, cereg = 0, SError = 0; 1092 unsigned int err_mask = 0, action = 0; 1093 int freeze = 0, abort=0; 1094 struct ata_link *link = NULL; 1095 struct ata_queued_cmd *qc = NULL; 1096 struct ata_eh_info *ehi; 1097 1098 hstatus = ioread32(hcr_base + HSTATUS); 1099 cereg = ioread32(hcr_base + CE); 1100 1101 /* first, analyze and record host port events */ 1102 link = &ap->link; 1103 ehi = &link->eh_info; 1104 ata_ehi_clear_desc(ehi); 1105 1106 /* 1107 * Handle & Clear SError 1108 */ 1109 1110 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); 1111 if (unlikely(SError & 0xFFFF0000)) 1112 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError); 1113 1114 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n", 1115 hstatus, cereg, ioread32(hcr_base + DE), SError); 1116 1117 /* handle fatal errors */ 1118 if (hstatus & FATAL_ERROR_DECODE) { 1119 ehi->err_mask |= AC_ERR_ATA_BUS; 1120 ehi->action |= ATA_EH_SOFTRESET; 1121 1122 freeze = 1; 1123 } 1124 1125 /* Handle SDB FIS receive & notify update */ 1126 if (hstatus & INT_ON_SNOTIFY_UPDATE) 1127 sata_async_notification(ap); 1128 1129 /* Handle PHYRDY change notification */ 1130 if (hstatus & INT_ON_PHYRDY_CHG) { 1131 DPRINTK("SATA FSL: PHYRDY change indication\n"); 1132 1133 /* Setup a soft-reset EH action */ 1134 ata_ehi_hotplugged(ehi); 1135 ata_ehi_push_desc(ehi, "%s", "PHY RDY changed"); 1136 freeze = 1; 1137 } 1138 1139 /* handle single device errors */ 1140 if (cereg) { 1141 /* 1142 * clear the command error, also clears queue to the device 1143 * in error, and we can (re)issue commands to this device. 1144 * When a device is in error all commands queued into the 1145 * host controller and at the device are considered aborted 1146 * and the queue for that device is stopped. Now, after 1147 * clearing the device error, we can issue commands to the 1148 * device to interrogate it to find the source of the error. 1149 */ 1150 abort = 1; 1151 1152 DPRINTK("single device error, CE=0x%x, DE=0x%x\n", 1153 ioread32(hcr_base + CE), ioread32(hcr_base + DE)); 1154 1155 /* find out the offending link and qc */ 1156 if (ap->nr_pmp_links) { 1157 unsigned int dev_num; 1158 1159 dereg = ioread32(hcr_base + DE); 1160 iowrite32(dereg, hcr_base + DE); 1161 iowrite32(cereg, hcr_base + CE); 1162 1163 dev_num = ffs(dereg) - 1; 1164 if (dev_num < ap->nr_pmp_links && dereg != 0) { 1165 link = &ap->pmp_link[dev_num]; 1166 ehi = &link->eh_info; 1167 qc = ata_qc_from_tag(ap, link->active_tag); 1168 /* 1169 * We should consider this as non fatal error, 1170 * and TF must be updated as done below. 1171 */ 1172 1173 err_mask |= AC_ERR_DEV; 1174 1175 } else { 1176 err_mask |= AC_ERR_HSM; 1177 action |= ATA_EH_HARDRESET; 1178 freeze = 1; 1179 } 1180 } else { 1181 dereg = ioread32(hcr_base + DE); 1182 iowrite32(dereg, hcr_base + DE); 1183 iowrite32(cereg, hcr_base + CE); 1184 1185 qc = ata_qc_from_tag(ap, link->active_tag); 1186 /* 1187 * We should consider this as non fatal error, 1188 * and TF must be updated as done below. 1189 */ 1190 err_mask |= AC_ERR_DEV; 1191 } 1192 } 1193 1194 /* record error info */ 1195 if (qc) 1196 qc->err_mask |= err_mask; 1197 else 1198 ehi->err_mask |= err_mask; 1199 1200 ehi->action |= action; 1201 1202 /* freeze or abort */ 1203 if (freeze) 1204 ata_port_freeze(ap); 1205 else if (abort) { 1206 if (qc) 1207 ata_link_abort(qc->dev->link); 1208 else 1209 ata_port_abort(ap); 1210 } 1211 } 1212 1213 static void sata_fsl_host_intr(struct ata_port *ap) 1214 { 1215 struct sata_fsl_host_priv *host_priv = ap->host->private_data; 1216 void __iomem *hcr_base = host_priv->hcr_base; 1217 u32 hstatus, done_mask = 0; 1218 struct ata_queued_cmd *qc; 1219 u32 SError; 1220 u32 tag; 1221 u32 status_mask = INT_ON_ERROR; 1222 1223 hstatus = ioread32(hcr_base + HSTATUS); 1224 1225 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); 1226 1227 /* Read command completed register */ 1228 done_mask = ioread32(hcr_base + CC); 1229 1230 /* Workaround for data length mismatch errata */ 1231 if (unlikely(hstatus & INT_ON_DATA_LENGTH_MISMATCH)) { 1232 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { 1233 qc = ata_qc_from_tag(ap, tag); 1234 if (qc && ata_is_atapi(qc->tf.protocol)) { 1235 u32 hcontrol; 1236 /* Set HControl[27] to clear error registers */ 1237 hcontrol = ioread32(hcr_base + HCONTROL); 1238 iowrite32(hcontrol | CLEAR_ERROR, 1239 hcr_base + HCONTROL); 1240 1241 /* Clear HControl[27] */ 1242 iowrite32(hcontrol & ~CLEAR_ERROR, 1243 hcr_base + HCONTROL); 1244 1245 /* Clear SError[E] bit */ 1246 sata_fsl_scr_write(&ap->link, SCR_ERROR, 1247 SError); 1248 1249 /* Ignore fatal error and device error */ 1250 status_mask &= ~(INT_ON_SINGL_DEVICE_ERR 1251 | INT_ON_FATAL_ERR); 1252 break; 1253 } 1254 } 1255 } 1256 1257 if (unlikely(SError & 0xFFFF0000)) { 1258 DPRINTK("serror @host_intr : 0x%x\n", SError); 1259 sata_fsl_error_intr(ap); 1260 } 1261 1262 if (unlikely(hstatus & status_mask)) { 1263 DPRINTK("error interrupt!!\n"); 1264 sata_fsl_error_intr(ap); 1265 return; 1266 } 1267 1268 VPRINTK("Status of all queues :\n"); 1269 VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n", 1270 done_mask, 1271 ioread32(hcr_base + CA), 1272 ioread32(hcr_base + CE), 1273 ioread32(hcr_base + CQ), 1274 ap->qc_active); 1275 1276 if (done_mask & ap->qc_active) { 1277 int i; 1278 /* clear CC bit, this will also complete the interrupt */ 1279 iowrite32(done_mask, hcr_base + CC); 1280 1281 DPRINTK("Status of all queues :\n"); 1282 DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n", 1283 done_mask, ioread32(hcr_base + CA), 1284 ioread32(hcr_base + CE)); 1285 1286 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) { 1287 if (done_mask & (1 << i)) 1288 DPRINTK 1289 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n", 1290 i, ioread32(hcr_base + CC), 1291 ioread32(hcr_base + CA)); 1292 } 1293 ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask); 1294 return; 1295 1296 } else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) { 1297 iowrite32(1, hcr_base + CC); 1298 qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL); 1299 1300 DPRINTK("completing non-ncq cmd, CC=0x%x\n", 1301 ioread32(hcr_base + CC)); 1302 1303 if (qc) { 1304 ata_qc_complete(qc); 1305 } 1306 } else { 1307 /* Spurious Interrupt!! */ 1308 DPRINTK("spurious interrupt!!, CC = 0x%x\n", 1309 ioread32(hcr_base + CC)); 1310 iowrite32(done_mask, hcr_base + CC); 1311 return; 1312 } 1313 } 1314 1315 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance) 1316 { 1317 struct ata_host *host = dev_instance; 1318 struct sata_fsl_host_priv *host_priv = host->private_data; 1319 void __iomem *hcr_base = host_priv->hcr_base; 1320 u32 interrupt_enables; 1321 unsigned handled = 0; 1322 struct ata_port *ap; 1323 1324 /* ack. any pending IRQs for this controller/port */ 1325 interrupt_enables = ioread32(hcr_base + HSTATUS); 1326 interrupt_enables &= 0x3F; 1327 1328 DPRINTK("interrupt status 0x%x\n", interrupt_enables); 1329 1330 if (!interrupt_enables) 1331 return IRQ_NONE; 1332 1333 spin_lock(&host->lock); 1334 1335 /* Assuming one port per host controller */ 1336 1337 ap = host->ports[0]; 1338 if (ap) { 1339 sata_fsl_host_intr(ap); 1340 } else { 1341 dev_warn(host->dev, "interrupt on disabled port 0\n"); 1342 } 1343 1344 iowrite32(interrupt_enables, hcr_base + HSTATUS); 1345 handled = 1; 1346 1347 spin_unlock(&host->lock); 1348 1349 return IRQ_RETVAL(handled); 1350 } 1351 1352 /* 1353 * Multiple ports are represented by multiple SATA controllers with 1354 * one port per controller 1355 */ 1356 static int sata_fsl_init_controller(struct ata_host *host) 1357 { 1358 struct sata_fsl_host_priv *host_priv = host->private_data; 1359 void __iomem *hcr_base = host_priv->hcr_base; 1360 u32 temp; 1361 1362 /* 1363 * NOTE : We cannot bring the controller online before setting 1364 * the CHBA, hence main controller initialization is done as 1365 * part of the port_start() callback 1366 */ 1367 1368 /* sata controller to operate in enterprise mode */ 1369 temp = ioread32(hcr_base + HCONTROL); 1370 iowrite32(temp & ~HCONTROL_LEGACY, hcr_base + HCONTROL); 1371 1372 /* ack. any pending IRQs for this controller/port */ 1373 temp = ioread32(hcr_base + HSTATUS); 1374 if (temp & 0x3F) 1375 iowrite32((temp & 0x3F), hcr_base + HSTATUS); 1376 1377 /* Keep interrupts disabled on the controller */ 1378 temp = ioread32(hcr_base + HCONTROL); 1379 iowrite32((temp & ~0x3F), hcr_base + HCONTROL); 1380 1381 /* Disable interrupt coalescing control(icc), for the moment */ 1382 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC)); 1383 iowrite32(0x01000000, hcr_base + ICC); 1384 1385 /* clear error registers, SError is cleared by libATA */ 1386 iowrite32(0x00000FFFF, hcr_base + CE); 1387 iowrite32(0x00000FFFF, hcr_base + DE); 1388 1389 /* 1390 * reset the number of command complete bits which will cause the 1391 * interrupt to be signaled 1392 */ 1393 fsl_sata_set_irq_coalescing(host, intr_coalescing_count, 1394 intr_coalescing_ticks); 1395 1396 /* 1397 * host controller will be brought on-line, during xx_port_start() 1398 * callback, that should also initiate the OOB, COMINIT sequence 1399 */ 1400 1401 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); 1402 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); 1403 1404 return 0; 1405 } 1406 1407 /* 1408 * scsi mid-layer and libata interface structures 1409 */ 1410 static struct scsi_host_template sata_fsl_sht = { 1411 ATA_NCQ_SHT("sata_fsl"), 1412 .can_queue = SATA_FSL_QUEUE_DEPTH, 1413 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE, 1414 .dma_boundary = ATA_DMA_BOUNDARY, 1415 }; 1416 1417 static struct ata_port_operations sata_fsl_ops = { 1418 .inherits = &sata_pmp_port_ops, 1419 1420 .qc_defer = ata_std_qc_defer, 1421 .qc_prep = sata_fsl_qc_prep, 1422 .qc_issue = sata_fsl_qc_issue, 1423 .qc_fill_rtf = sata_fsl_qc_fill_rtf, 1424 1425 .scr_read = sata_fsl_scr_read, 1426 .scr_write = sata_fsl_scr_write, 1427 1428 .freeze = sata_fsl_freeze, 1429 .thaw = sata_fsl_thaw, 1430 .softreset = sata_fsl_softreset, 1431 .hardreset = sata_fsl_hardreset, 1432 .pmp_softreset = sata_fsl_softreset, 1433 .error_handler = sata_fsl_error_handler, 1434 .post_internal_cmd = sata_fsl_post_internal_cmd, 1435 1436 .port_start = sata_fsl_port_start, 1437 .port_stop = sata_fsl_port_stop, 1438 1439 .pmp_attach = sata_fsl_pmp_attach, 1440 .pmp_detach = sata_fsl_pmp_detach, 1441 }; 1442 1443 static const struct ata_port_info sata_fsl_port_info[] = { 1444 { 1445 .flags = SATA_FSL_HOST_FLAGS, 1446 .pio_mask = ATA_PIO4, 1447 .udma_mask = ATA_UDMA6, 1448 .port_ops = &sata_fsl_ops, 1449 }, 1450 }; 1451 1452 static int sata_fsl_probe(struct platform_device *ofdev) 1453 { 1454 int retval = -ENXIO; 1455 void __iomem *hcr_base = NULL; 1456 void __iomem *ssr_base = NULL; 1457 void __iomem *csr_base = NULL; 1458 struct sata_fsl_host_priv *host_priv = NULL; 1459 int irq; 1460 struct ata_host *host = NULL; 1461 u32 temp; 1462 1463 struct ata_port_info pi = sata_fsl_port_info[0]; 1464 const struct ata_port_info *ppi[] = { &pi, NULL }; 1465 1466 dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n"); 1467 1468 hcr_base = of_iomap(ofdev->dev.of_node, 0); 1469 if (!hcr_base) 1470 goto error_exit_with_cleanup; 1471 1472 ssr_base = hcr_base + 0x100; 1473 csr_base = hcr_base + 0x140; 1474 1475 if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) { 1476 temp = ioread32(csr_base + TRANSCFG); 1477 temp = temp & 0xffffffe0; 1478 iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG); 1479 } 1480 1481 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG)); 1482 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc)); 1483 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE); 1484 1485 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL); 1486 if (!host_priv) 1487 goto error_exit_with_cleanup; 1488 1489 host_priv->hcr_base = hcr_base; 1490 host_priv->ssr_base = ssr_base; 1491 host_priv->csr_base = csr_base; 1492 1493 irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); 1494 if (!irq) { 1495 dev_err(&ofdev->dev, "invalid irq from platform\n"); 1496 goto error_exit_with_cleanup; 1497 } 1498 host_priv->irq = irq; 1499 1500 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2")) 1501 host_priv->data_snoop = DATA_SNOOP_ENABLE_V2; 1502 else 1503 host_priv->data_snoop = DATA_SNOOP_ENABLE_V1; 1504 1505 /* allocate host structure */ 1506 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS); 1507 if (!host) { 1508 retval = -ENOMEM; 1509 goto error_exit_with_cleanup; 1510 } 1511 1512 /* host->iomap is not used currently */ 1513 host->private_data = host_priv; 1514 1515 /* initialize host controller */ 1516 sata_fsl_init_controller(host); 1517 1518 /* 1519 * Now, register with libATA core, this will also initiate the 1520 * device discovery process, invoking our port_start() handler & 1521 * error_handler() to execute a dummy Softreset EH session 1522 */ 1523 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG, 1524 &sata_fsl_sht); 1525 1526 platform_set_drvdata(ofdev, host); 1527 1528 host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show; 1529 host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store; 1530 sysfs_attr_init(&host_priv->intr_coalescing.attr); 1531 host_priv->intr_coalescing.attr.name = "intr_coalescing"; 1532 host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR; 1533 retval = device_create_file(host->dev, &host_priv->intr_coalescing); 1534 if (retval) 1535 goto error_exit_with_cleanup; 1536 1537 host_priv->rx_watermark.show = fsl_sata_rx_watermark_show; 1538 host_priv->rx_watermark.store = fsl_sata_rx_watermark_store; 1539 sysfs_attr_init(&host_priv->rx_watermark.attr); 1540 host_priv->rx_watermark.attr.name = "rx_watermark"; 1541 host_priv->rx_watermark.attr.mode = S_IRUGO | S_IWUSR; 1542 retval = device_create_file(host->dev, &host_priv->rx_watermark); 1543 if (retval) { 1544 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing); 1545 goto error_exit_with_cleanup; 1546 } 1547 1548 return 0; 1549 1550 error_exit_with_cleanup: 1551 1552 if (host) 1553 ata_host_detach(host); 1554 1555 if (hcr_base) 1556 iounmap(hcr_base); 1557 kfree(host_priv); 1558 1559 return retval; 1560 } 1561 1562 static int sata_fsl_remove(struct platform_device *ofdev) 1563 { 1564 struct ata_host *host = platform_get_drvdata(ofdev); 1565 struct sata_fsl_host_priv *host_priv = host->private_data; 1566 1567 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing); 1568 device_remove_file(&ofdev->dev, &host_priv->rx_watermark); 1569 1570 ata_host_detach(host); 1571 1572 irq_dispose_mapping(host_priv->irq); 1573 iounmap(host_priv->hcr_base); 1574 kfree(host_priv); 1575 1576 return 0; 1577 } 1578 1579 #ifdef CONFIG_PM_SLEEP 1580 static int sata_fsl_suspend(struct platform_device *op, pm_message_t state) 1581 { 1582 struct ata_host *host = platform_get_drvdata(op); 1583 return ata_host_suspend(host, state); 1584 } 1585 1586 static int sata_fsl_resume(struct platform_device *op) 1587 { 1588 struct ata_host *host = platform_get_drvdata(op); 1589 struct sata_fsl_host_priv *host_priv = host->private_data; 1590 int ret; 1591 void __iomem *hcr_base = host_priv->hcr_base; 1592 struct ata_port *ap = host->ports[0]; 1593 struct sata_fsl_port_priv *pp = ap->private_data; 1594 1595 ret = sata_fsl_init_controller(host); 1596 if (ret) { 1597 dev_err(&op->dev, "Error initializing hardware\n"); 1598 return ret; 1599 } 1600 1601 /* Recovery the CHBA register in host controller cmd register set */ 1602 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA); 1603 1604 iowrite32((ioread32(hcr_base + HCONTROL) 1605 | HCONTROL_ONLINE_PHY_RST 1606 | HCONTROL_SNOOP_ENABLE 1607 | HCONTROL_PMP_ATTACHED), 1608 hcr_base + HCONTROL); 1609 1610 ata_host_resume(host); 1611 return 0; 1612 } 1613 #endif 1614 1615 static struct of_device_id fsl_sata_match[] = { 1616 { 1617 .compatible = "fsl,pq-sata", 1618 }, 1619 { 1620 .compatible = "fsl,pq-sata-v2", 1621 }, 1622 {}, 1623 }; 1624 1625 MODULE_DEVICE_TABLE(of, fsl_sata_match); 1626 1627 static struct platform_driver fsl_sata_driver = { 1628 .driver = { 1629 .name = "fsl-sata", 1630 .of_match_table = fsl_sata_match, 1631 }, 1632 .probe = sata_fsl_probe, 1633 .remove = sata_fsl_remove, 1634 #ifdef CONFIG_PM_SLEEP 1635 .suspend = sata_fsl_suspend, 1636 .resume = sata_fsl_resume, 1637 #endif 1638 }; 1639 1640 module_platform_driver(fsl_sata_driver); 1641 1642 MODULE_LICENSE("GPL"); 1643 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor"); 1644 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver"); 1645 MODULE_VERSION("1.10"); 1646