2 * drivers/ata/sata_fsl.c
4 * Freescale 3.0Gbps SATA device driver
6 * Author: Ashish Kalra <ashish.kalra@freescale.com>
7 * Li Yang <leoli@freescale.com>
9 * Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
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.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
22 #include <scsi/scsi_host.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <linux/libata.h>
26 #include <linux/of_platform.h>
28 /* Controller information */
30 SATA_FSL_QUEUE_DEPTH = 16,
31 SATA_FSL_MAX_PRD = 63,
32 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
33 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
35 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
36 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
39 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
40 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
41 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
44 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
45 * chained indirect PRDEs upto a max count of 63.
46 * We are allocating an array of 63 PRDEs contigiously, but PRDE#15 will
47 * be setup as an indirect descriptor, pointing to it's next
48 * (contigious) PRDE. Though chained indirect PRDE arrays are
49 * supported,it will be more efficient to use a direct PRDT and
50 * a single chain/link to indirect PRDE array/PRDT.
53 SATA_FSL_CMD_DESC_CFIS_SZ = 32,
54 SATA_FSL_CMD_DESC_SFIS_SZ = 32,
55 SATA_FSL_CMD_DESC_ACMD_SZ = 16,
56 SATA_FSL_CMD_DESC_RSRVD = 16,
58 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
59 SATA_FSL_CMD_DESC_SFIS_SZ +
60 SATA_FSL_CMD_DESC_ACMD_SZ +
61 SATA_FSL_CMD_DESC_RSRVD +
62 SATA_FSL_MAX_PRD * 16),
64 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
65 (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),
70 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
71 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
72 SATA_FSL_CMD_DESC_AR_SZ),
75 * MPC8315 has two SATA controllers, SATA1 & SATA2
76 * (one port per controller)
77 * MPC837x has 2/4 controllers, one port per controller
80 SATA_FSL_MAX_PORTS = 1,
82 SATA_FSL_IRQ_FLAG = IRQF_SHARED,
86 * Host Controller command register set - per port
102 * Host Status Register (HStatus) bitdefs
105 GOING_OFFLINE = (1 << 30),
106 BIST_ERR = (1 << 29),
108 FATAL_ERR_HC_MASTER_ERR = (1 << 18),
109 FATAL_ERR_PARITY_ERR_TX = (1 << 17),
110 FATAL_ERR_PARITY_ERR_RX = (1 << 16),
111 FATAL_ERR_DATA_UNDERRUN = (1 << 13),
112 FATAL_ERR_DATA_OVERRUN = (1 << 12),
113 FATAL_ERR_CRC_ERR_TX = (1 << 11),
114 FATAL_ERR_CRC_ERR_RX = (1 << 10),
115 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
116 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
118 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
119 FATAL_ERR_PARITY_ERR_TX |
120 FATAL_ERR_PARITY_ERR_RX |
121 FATAL_ERR_DATA_UNDERRUN |
122 FATAL_ERR_DATA_OVERRUN |
123 FATAL_ERR_CRC_ERR_TX |
124 FATAL_ERR_CRC_ERR_RX |
125 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
127 INT_ON_FATAL_ERR = (1 << 5),
128 INT_ON_PHYRDY_CHG = (1 << 4),
130 INT_ON_SIGNATURE_UPDATE = (1 << 3),
131 INT_ON_SNOTIFY_UPDATE = (1 << 2),
132 INT_ON_SINGL_DEVICE_ERR = (1 << 1),
133 INT_ON_CMD_COMPLETE = 1,
135 INT_ON_ERROR = INT_ON_FATAL_ERR |
136 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
139 * Host Control Register (HControl) bitdefs
141 HCONTROL_ONLINE_PHY_RST = (1 << 31),
142 HCONTROL_FORCE_OFFLINE = (1 << 30),
143 HCONTROL_PARITY_PROT_MOD = (1 << 14),
144 HCONTROL_DPATH_PARITY = (1 << 12),
145 HCONTROL_SNOOP_ENABLE = (1 << 10),
146 HCONTROL_PMP_ATTACHED = (1 << 9),
147 HCONTROL_COPYOUT_STATFIS = (1 << 8),
148 IE_ON_FATAL_ERR = (1 << 5),
149 IE_ON_PHYRDY_CHG = (1 << 4),
150 IE_ON_SIGNATURE_UPDATE = (1 << 3),
151 IE_ON_SNOTIFY_UPDATE = (1 << 2),
152 IE_ON_SINGL_DEVICE_ERR = (1 << 1),
153 IE_ON_CMD_COMPLETE = 1,
155 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
156 IE_ON_SIGNATURE_UPDATE |
157 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
159 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
160 DATA_SNOOP_ENABLE = (1 << 22),
164 * SATA Superset Registers
174 * Control Status Register Set
188 /* PHY (link-layer) configuration control */
190 PHY_BIST_ENABLE = 0x01,
194 * Command Header Table entry, i.e, command slot
195 * 4 Dwords per command slot, command header size == 64 Dwords.
197 struct cmdhdr_tbl_entry {
205 * Description information bitdefs
208 VENDOR_SPECIFIC_BIST = (1 << 10),
209 CMD_DESC_SNOOP_ENABLE = (1 << 9),
210 FPDMA_QUEUED_CMD = (1 << 8),
213 ATAPI_CMD = (1 << 5),
219 struct command_desc {
224 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
225 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
229 * Physical region table descriptor(PRD)
239 * ata_port private data
240 * This is our per-port instance data.
242 struct sata_fsl_port_priv {
243 struct cmdhdr_tbl_entry *cmdslot;
244 dma_addr_t cmdslot_paddr;
245 struct command_desc *cmdentry;
246 dma_addr_t cmdentry_paddr;
249 * SATA FSL controller has a Status FIS which should contain the
250 * received D2H FIS & taskfile registers. This SFIS is present in
251 * the command descriptor, and to have a ready reference to it,
252 * we are caching it here, quite similar to what is done in H/W on
253 * AHCI compliant devices by copying taskfile fields to a 32-bit
257 struct ata_taskfile tf;
261 * ata_port->host_set private data
263 struct sata_fsl_host_priv {
264 void __iomem *hcr_base;
265 void __iomem *ssr_base;
266 void __iomem *csr_base;
270 static inline unsigned int sata_fsl_tag(unsigned int tag,
271 void __iomem *hcr_base)
273 /* We let libATA core do actual (queue) tag allocation */
275 /* all non NCQ/queued commands should have tag#0 */
276 if (ata_tag_internal(tag)) {
277 DPRINTK("mapping internal cmds to tag#0\n");
281 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
282 DPRINTK("tag %d invalid : out of range\n", tag);
286 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
287 DPRINTK("tag %d invalid : in use!!\n", tag);
294 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
295 unsigned int tag, u32 desc_info,
296 u32 data_xfer_len, u8 num_prde,
299 dma_addr_t cmd_descriptor_address;
301 cmd_descriptor_address = pp->cmdentry_paddr +
302 tag * SATA_FSL_CMD_DESC_SIZE;
304 /* NOTE: both data_xfer_len & fis_len are Dword counts */
306 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
307 pp->cmdslot[tag].prde_fis_len =
308 cpu_to_le32((num_prde << 16) | (fis_len << 2));
309 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
310 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
312 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
313 pp->cmdslot[tag].cda,
314 pp->cmdslot[tag].prde_fis_len,
315 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
319 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
320 u32 *ttl, dma_addr_t cmd_desc_paddr)
322 struct scatterlist *sg;
323 unsigned int num_prde = 0;
327 * NOTE : direct & indirect prdt's are contigiously allocated
329 struct prde *prd = (struct prde *)&((struct command_desc *)
332 struct prde *prd_ptr_to_indirect_ext = NULL;
333 unsigned indirect_ext_segment_sz = 0;
334 dma_addr_t indirect_ext_segment_paddr;
337 VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
339 indirect_ext_segment_paddr = cmd_desc_paddr +
340 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
342 for_each_sg(qc->sg, sg, qc->n_elem, si) {
343 dma_addr_t sg_addr = sg_dma_address(sg);
344 u32 sg_len = sg_dma_len(sg);
346 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%x, sg_len = %d\n",
349 /* warn if each s/g element is not dword aligned */
351 ata_port_printk(qc->ap, KERN_ERR,
352 "s/g addr unaligned : 0x%x\n", sg_addr);
354 ata_port_printk(qc->ap, KERN_ERR,
355 "s/g len unaligned : 0x%x\n", sg_len);
357 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
358 sg_next(sg) != NULL) {
359 VPRINTK("setting indirect prde\n");
360 prd_ptr_to_indirect_ext = prd;
361 prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
362 indirect_ext_segment_sz = 0;
367 ttl_dwords += sg_len;
368 prd->dba = cpu_to_le32(sg_addr);
370 cpu_to_le32(DATA_SNOOP_ENABLE | (sg_len & ~0x03));
372 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
373 ttl_dwords, prd->dba, prd->ddc_and_ext);
377 if (prd_ptr_to_indirect_ext)
378 indirect_ext_segment_sz += sg_len;
381 if (prd_ptr_to_indirect_ext) {
382 /* set indirect extension flag along with indirect ext. size */
383 prd_ptr_to_indirect_ext->ddc_and_ext =
384 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
386 (indirect_ext_segment_sz & ~0x03)));
393 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
395 struct ata_port *ap = qc->ap;
396 struct sata_fsl_port_priv *pp = ap->private_data;
397 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
398 void __iomem *hcr_base = host_priv->hcr_base;
399 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
400 struct command_desc *cd;
401 u32 desc_info = CMD_DESC_SNOOP_ENABLE;
406 cd = (struct command_desc *)pp->cmdentry + tag;
407 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
409 ata_tf_to_fis(&qc->tf, 0, 1, (u8 *) &cd->cfis);
411 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
412 cd->cfis[0], cd->cfis[1], cd->cfis[2]);
414 if (qc->tf.protocol == ATA_PROT_NCQ) {
415 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
416 cd->cfis[3], cd->cfis[11]);
419 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
420 if (ata_is_atapi(qc->tf.protocol)) {
421 desc_info |= ATAPI_CMD;
422 memset((void *)&cd->acmd, 0, 32);
423 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
426 if (qc->flags & ATA_QCFLAG_DMAMAP)
427 num_prde = sata_fsl_fill_sg(qc, (void *)cd,
428 &ttl_dwords, cd_paddr);
430 if (qc->tf.protocol == ATA_PROT_NCQ)
431 desc_info |= FPDMA_QUEUED_CMD;
433 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
436 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
437 desc_info, ttl_dwords, num_prde);
440 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
442 struct ata_port *ap = qc->ap;
443 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
444 void __iomem *hcr_base = host_priv->hcr_base;
445 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
447 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
448 ioread32(CQ + hcr_base),
449 ioread32(CA + hcr_base),
450 ioread32(CE + hcr_base), ioread32(CC + hcr_base));
452 /* Simply queue command to the controller/device */
453 iowrite32(1 << tag, CQ + hcr_base);
455 VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
456 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
458 VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
459 ioread32(CE + hcr_base),
460 ioread32(DE + hcr_base),
461 ioread32(CC + hcr_base),
462 ioread32(COMMANDSTAT + host_priv->csr_base));
467 static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
470 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
471 void __iomem *ssr_base = host_priv->ssr_base;
485 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
487 iowrite32(val, ssr_base + (sc_reg * 4));
491 static int sata_fsl_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
494 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
495 void __iomem *ssr_base = host_priv->ssr_base;
509 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
511 *val = ioread32(ssr_base + (sc_reg * 4));
515 static void sata_fsl_freeze(struct ata_port *ap)
517 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
518 void __iomem *hcr_base = host_priv->hcr_base;
521 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
522 ioread32(CQ + hcr_base),
523 ioread32(CA + hcr_base),
524 ioread32(CE + hcr_base), ioread32(DE + hcr_base));
525 VPRINTK("CmdStat = 0x%x\n",
526 ioread32(host_priv->csr_base + COMMANDSTAT));
528 /* disable interrupts on the controller/port */
529 temp = ioread32(hcr_base + HCONTROL);
530 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
532 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
533 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
536 static void sata_fsl_thaw(struct ata_port *ap)
538 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
539 void __iomem *hcr_base = host_priv->hcr_base;
542 /* ack. any pending IRQs for this controller/port */
543 temp = ioread32(hcr_base + HSTATUS);
545 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
548 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
550 /* enable interrupts on the controller/port */
551 temp = ioread32(hcr_base + HCONTROL);
552 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
554 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
555 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
559 * NOTE : 1st D2H FIS from device does not update sfis in command descriptor.
561 static inline void sata_fsl_cache_taskfile_from_d2h_fis(struct ata_queued_cmd
565 struct sata_fsl_port_priv *pp = ap->private_data;
566 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
567 void __iomem *hcr_base = host_priv->hcr_base;
568 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
569 struct command_desc *cd;
571 cd = pp->cmdentry + tag;
573 ata_tf_from_fis(cd->sfis, &pp->tf);
576 static u8 sata_fsl_check_status(struct ata_port *ap)
578 struct sata_fsl_port_priv *pp = ap->private_data;
580 return pp->tf.command;
583 static void sata_fsl_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
585 struct sata_fsl_port_priv *pp = ap->private_data;
590 static int sata_fsl_port_start(struct ata_port *ap)
592 struct device *dev = ap->host->dev;
593 struct sata_fsl_port_priv *pp;
597 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
598 void __iomem *hcr_base = host_priv->hcr_base;
601 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
605 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
611 memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
614 pp->cmdslot_paddr = mem_dma;
616 mem += SATA_FSL_CMD_SLOT_SIZE;
617 mem_dma += SATA_FSL_CMD_SLOT_SIZE;
620 pp->cmdentry_paddr = mem_dma;
622 ap->private_data = pp;
624 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
625 pp->cmdslot_paddr, pp->cmdentry_paddr);
627 /* Now, update the CHBA register in host controller cmd register set */
628 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
631 * Now, we can bring the controller on-line & also initiate
632 * the COMINIT sequence, we simply return here and the boot-probing
633 * & device discovery process is re-initiated by libATA using a
634 * Softreset EH (dummy) session. Hence, boot probing and device
635 * discovey will be part of sata_fsl_softreset() callback.
638 temp = ioread32(hcr_base + HCONTROL);
639 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
641 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
642 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
643 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
645 #ifdef CONFIG_MPC8315_DS
647 * Workaround for 8315DS board 3gbps link-up issue,
648 * currently limit SATA port to GEN1 speed
650 sata_fsl_scr_read(ap, SCR_CONTROL, &temp);
653 sata_fsl_scr_write(ap, SCR_CONTROL, temp);
655 sata_fsl_scr_read(ap, SCR_CONTROL, &temp);
656 dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n",
663 static void sata_fsl_port_stop(struct ata_port *ap)
665 struct device *dev = ap->host->dev;
666 struct sata_fsl_port_priv *pp = ap->private_data;
667 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
668 void __iomem *hcr_base = host_priv->hcr_base;
672 * Force host controller to go off-line, aborting current operations
674 temp = ioread32(hcr_base + HCONTROL);
675 temp &= ~HCONTROL_ONLINE_PHY_RST;
676 temp |= HCONTROL_FORCE_OFFLINE;
677 iowrite32(temp, hcr_base + HCONTROL);
679 /* Poll for controller to go offline - should happen immediately */
680 ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
682 ap->private_data = NULL;
683 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
684 pp->cmdslot, pp->cmdslot_paddr);
689 static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
691 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
692 void __iomem *hcr_base = host_priv->hcr_base;
693 struct ata_taskfile tf;
696 temp = ioread32(hcr_base + SIGNATURE);
698 VPRINTK("raw sig = 0x%x\n", temp);
699 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
700 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
702 tf.lbah = (temp >> 24) & 0xff;
703 tf.lbam = (temp >> 16) & 0xff;
704 tf.lbal = (temp >> 8) & 0xff;
705 tf.nsect = temp & 0xff;
707 return ata_dev_classify(&tf);
710 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
711 unsigned long deadline)
713 struct ata_port *ap = link->ap;
714 struct sata_fsl_port_priv *pp = ap->private_data;
715 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
716 void __iomem *hcr_base = host_priv->hcr_base;
718 struct ata_taskfile tf;
722 unsigned long start_jiffies;
724 DPRINTK("in xx_softreset\n");
728 * Force host controller to go off-line, aborting current operations
730 temp = ioread32(hcr_base + HCONTROL);
731 temp &= ~HCONTROL_ONLINE_PHY_RST;
732 iowrite32(temp, hcr_base + HCONTROL);
734 /* Poll for controller to go offline */
735 temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 500);
738 ata_port_printk(ap, KERN_ERR,
739 "Softreset failed, not off-lined %d\n", i);
742 * Try to offline controller atleast twice
748 goto try_offline_again;
751 DPRINTK("softreset, controller off-lined\n");
752 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
753 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
756 * PHY reset should remain asserted for atleast 1ms
761 * Now, bring the host controller online again, this can take time
762 * as PHY reset and communication establishment, 1st D2H FIS and
763 * device signature update is done, on safe side assume 500ms
764 * NOTE : Host online status may be indicated immediately!!
767 temp = ioread32(hcr_base + HCONTROL);
768 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
769 iowrite32(temp, hcr_base + HCONTROL);
771 temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, 0, 1, 500);
773 if (!(temp & ONLINE)) {
774 ata_port_printk(ap, KERN_ERR,
775 "Softreset failed, not on-lined\n");
779 DPRINTK("softreset, controller off-lined & on-lined\n");
780 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
781 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
784 * First, wait for the PHYRDY change to occur before waiting for
785 * the signature, and also verify if SStatus indicates device
789 temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0, 1, 500);
790 if ((!(temp & 0x10)) || ata_link_offline(link)) {
791 ata_port_printk(ap, KERN_WARNING,
792 "No Device OR PHYRDY change,Hstatus = 0x%x\n",
793 ioread32(hcr_base + HSTATUS));
798 * Wait for the first D2H from device,i.e,signature update notification
800 start_jiffies = jiffies;
801 temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0x10,
802 500, jiffies_to_msecs(deadline - start_jiffies));
804 if ((temp & 0xFF) != 0x18) {
805 ata_port_printk(ap, KERN_WARNING, "No Signature Update\n");
808 ata_port_printk(ap, KERN_INFO,
809 "Signature Update detected @ %d msecs\n",
810 jiffies_to_msecs(jiffies - start_jiffies));
814 * Send a device reset (SRST) explicitly on command slot #0
815 * Check : will the command queue (reg) be cleared during offlining ??
816 * Also we will be online only if Phy commn. has been established
817 * and device presence has been detected, therefore if we have
818 * reached here, we can send a command to the target device
821 DPRINTK("Sending SRST/device reset\n");
823 ata_tf_init(link->device, &tf);
824 cfis = (u8 *) &pp->cmdentry->cfis;
826 /* device reset/SRST is a control register update FIS, uses tag0 */
827 sata_fsl_setup_cmd_hdr_entry(pp, 0,
828 SRST_CMD | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
830 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
831 ata_tf_to_fis(&tf, 0, 0, cfis);
833 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
834 cfis[0], cfis[1], cfis[2], cfis[3]);
837 * Queue SRST command to the controller/device, ensure that no
838 * other commands are active on the controller/device
841 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
842 ioread32(CQ + hcr_base),
843 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
845 iowrite32(0xFFFF, CC + hcr_base);
846 iowrite32(1, CQ + hcr_base);
848 temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000);
850 ata_port_printk(ap, KERN_WARNING, "ATA_SRST issue failed\n");
852 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
853 ioread32(CQ + hcr_base),
854 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
856 sata_fsl_scr_read(ap, SCR_ERROR, &Serror);
858 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
859 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
860 DPRINTK("Serror = 0x%x\n", Serror);
867 * SATA device enters reset state after receving a Control register
868 * FIS with SRST bit asserted and it awaits another H2D Control reg.
869 * FIS with SRST bit cleared, then the device does internal diags &
870 * initialization, followed by indicating it's initialization status
871 * using ATA signature D2H register FIS to the host controller.
874 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
876 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
877 ata_tf_to_fis(&tf, 0, 0, cfis);
879 iowrite32(1, CQ + hcr_base);
880 msleep(150); /* ?? */
883 * The above command would have signalled an interrupt on command
884 * complete, which needs special handling, by clearing the Nth
885 * command bit of the CCreg
887 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
889 DPRINTK("SATA FSL : Now checking device signature\n");
891 *class = ATA_DEV_NONE;
893 /* Verify if SStatus indicates device presence */
894 if (ata_link_online(link)) {
896 * if we are here, device presence has been detected,
897 * 1st D2H FIS would have been received, but sfis in
898 * command desc. is not updated, but signature register
899 * would have been updated
902 *class = sata_fsl_dev_classify(ap);
904 DPRINTK("class = %d\n", *class);
905 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
906 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
915 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
917 if (qc->flags & ATA_QCFLAG_FAILED)
918 qc->err_mask |= AC_ERR_OTHER;
921 /* make DMA engine forget about the failed command */
926 static void sata_fsl_error_intr(struct ata_port *ap)
928 struct ata_link *link = &ap->link;
929 struct ata_eh_info *ehi = &link->eh_info;
930 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
931 void __iomem *hcr_base = host_priv->hcr_base;
932 u32 hstatus, dereg, cereg = 0, SError = 0;
933 unsigned int err_mask = 0, action = 0;
934 struct ata_queued_cmd *qc;
937 hstatus = ioread32(hcr_base + HSTATUS);
938 cereg = ioread32(hcr_base + CE);
940 ata_ehi_clear_desc(ehi);
943 * Handle & Clear SError
946 sata_fsl_scr_read(ap, SCR_ERROR, &SError);
947 if (unlikely(SError & 0xFFFF0000)) {
948 sata_fsl_scr_write(ap, SCR_ERROR, SError);
949 err_mask |= AC_ERR_ATA_BUS;
952 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
953 hstatus, cereg, ioread32(hcr_base + DE), SError);
955 /* handle single device errors */
958 * clear the command error, also clears queue to the device
959 * in error, and we can (re)issue commands to this device.
960 * When a device is in error all commands queued into the
961 * host controller and at the device are considered aborted
962 * and the queue for that device is stopped. Now, after
963 * clearing the device error, we can issue commands to the
964 * device to interrogate it to find the source of the error.
966 dereg = ioread32(hcr_base + DE);
967 iowrite32(dereg, hcr_base + DE);
968 iowrite32(cereg, hcr_base + CE);
970 DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
971 ioread32(hcr_base + CE), ioread32(hcr_base + DE));
973 * We should consider this as non fatal error, and TF must
974 * be updated as done below.
977 err_mask |= AC_ERR_DEV;
980 /* handle fatal errors */
981 if (hstatus & FATAL_ERROR_DECODE) {
982 err_mask |= AC_ERR_ATA_BUS;
983 action |= ATA_EH_RESET;
984 /* how will fatal error interrupts be completed ?? */
988 /* Handle PHYRDY change notification */
989 if (hstatus & INT_ON_PHYRDY_CHG) {
990 DPRINTK("SATA FSL: PHYRDY change indication\n");
992 /* Setup a soft-reset EH action */
993 ata_ehi_hotplugged(ehi);
997 /* record error info */
998 qc = ata_qc_from_tag(ap, link->active_tag);
1001 sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap);
1002 qc->err_mask |= err_mask;
1004 ehi->err_mask |= err_mask;
1006 ehi->action |= action;
1007 ehi->serror |= SError;
1009 /* freeze or abort */
1011 ata_port_freeze(ap);
1016 static void sata_fsl_qc_complete(struct ata_queued_cmd *qc)
1018 if (qc->flags & ATA_QCFLAG_RESULT_TF) {
1019 DPRINTK("xx_qc_complete called\n");
1020 sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap);
1024 static void sata_fsl_host_intr(struct ata_port *ap)
1026 struct ata_link *link = &ap->link;
1027 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1028 void __iomem *hcr_base = host_priv->hcr_base;
1029 u32 hstatus, qc_active = 0;
1030 struct ata_queued_cmd *qc;
1033 hstatus = ioread32(hcr_base + HSTATUS);
1035 sata_fsl_scr_read(ap, SCR_ERROR, &SError);
1037 if (unlikely(SError & 0xFFFF0000)) {
1038 DPRINTK("serror @host_intr : 0x%x\n", SError);
1039 sata_fsl_error_intr(ap);
1043 if (unlikely(hstatus & INT_ON_ERROR)) {
1044 DPRINTK("error interrupt!!\n");
1045 sata_fsl_error_intr(ap);
1049 if (link->sactive) { /* only true for NCQ commands */
1051 /* Read command completed register */
1052 qc_active = ioread32(hcr_base + CC);
1053 /* clear CC bit, this will also complete the interrupt */
1054 iowrite32(qc_active, hcr_base + CC);
1056 DPRINTK("Status of all queues :\n");
1057 DPRINTK("qc_active/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
1058 qc_active, ioread32(hcr_base + CA),
1059 ioread32(hcr_base + CE));
1061 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
1062 if (qc_active & (1 << i)) {
1063 qc = ata_qc_from_tag(ap, i);
1065 sata_fsl_qc_complete(qc);
1066 ata_qc_complete(qc);
1069 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
1070 i, ioread32(hcr_base + CC),
1071 ioread32(hcr_base + CA));
1076 } else if (ap->qc_active) {
1077 iowrite32(1, hcr_base + CC);
1078 qc = ata_qc_from_tag(ap, link->active_tag);
1080 DPRINTK("completing non-ncq cmd, tag=%d,CC=0x%x\n",
1081 link->active_tag, ioread32(hcr_base + CC));
1084 sata_fsl_qc_complete(qc);
1085 ata_qc_complete(qc);
1088 /* Spurious Interrupt!! */
1089 DPRINTK("spurious interrupt!!, CC = 0x%x\n",
1090 ioread32(hcr_base + CC));
1095 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
1097 struct ata_host *host = dev_instance;
1098 struct sata_fsl_host_priv *host_priv = host->private_data;
1099 void __iomem *hcr_base = host_priv->hcr_base;
1100 u32 interrupt_enables;
1101 unsigned handled = 0;
1102 struct ata_port *ap;
1104 /* ack. any pending IRQs for this controller/port */
1105 interrupt_enables = ioread32(hcr_base + HSTATUS);
1106 interrupt_enables &= 0x3F;
1108 DPRINTK("interrupt status 0x%x\n", interrupt_enables);
1110 if (!interrupt_enables)
1113 spin_lock(&host->lock);
1115 /* Assuming one port per host controller */
1117 ap = host->ports[0];
1119 sata_fsl_host_intr(ap);
1121 dev_printk(KERN_WARNING, host->dev,
1122 "interrupt on disabled port 0\n");
1125 iowrite32(interrupt_enables, hcr_base + HSTATUS);
1128 spin_unlock(&host->lock);
1130 return IRQ_RETVAL(handled);
1134 * Multiple ports are represented by multiple SATA controllers with
1135 * one port per controller
1137 static int sata_fsl_init_controller(struct ata_host *host)
1139 struct sata_fsl_host_priv *host_priv = host->private_data;
1140 void __iomem *hcr_base = host_priv->hcr_base;
1144 * NOTE : We cannot bring the controller online before setting
1145 * the CHBA, hence main controller initialization is done as
1146 * part of the port_start() callback
1149 /* ack. any pending IRQs for this controller/port */
1150 temp = ioread32(hcr_base + HSTATUS);
1152 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
1154 /* Keep interrupts disabled on the controller */
1155 temp = ioread32(hcr_base + HCONTROL);
1156 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
1158 /* Disable interrupt coalescing control(icc), for the moment */
1159 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
1160 iowrite32(0x01000000, hcr_base + ICC);
1162 /* clear error registers, SError is cleared by libATA */
1163 iowrite32(0x00000FFFF, hcr_base + CE);
1164 iowrite32(0x00000FFFF, hcr_base + DE);
1166 /* initially assuming no Port multiplier, set CQPMP to 0 */
1167 iowrite32(0x0, hcr_base + CQPMP);
1170 * host controller will be brought on-line, during xx_port_start()
1171 * callback, that should also initiate the OOB, COMINIT sequence
1174 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1175 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1181 * scsi mid-layer and libata interface structures
1183 static struct scsi_host_template sata_fsl_sht = {
1184 ATA_NCQ_SHT("sata_fsl"),
1185 .can_queue = SATA_FSL_QUEUE_DEPTH,
1186 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
1187 .dma_boundary = ATA_DMA_BOUNDARY,
1190 static const struct ata_port_operations sata_fsl_ops = {
1191 .inherits = &sata_port_ops,
1193 .check_status = sata_fsl_check_status,
1194 .check_altstatus = sata_fsl_check_status,
1196 .tf_read = sata_fsl_tf_read,
1198 .qc_prep = sata_fsl_qc_prep,
1199 .qc_issue = sata_fsl_qc_issue,
1201 .scr_read = sata_fsl_scr_read,
1202 .scr_write = sata_fsl_scr_write,
1204 .freeze = sata_fsl_freeze,
1205 .thaw = sata_fsl_thaw,
1206 .softreset = sata_fsl_softreset,
1207 .post_internal_cmd = sata_fsl_post_internal_cmd,
1209 .port_start = sata_fsl_port_start,
1210 .port_stop = sata_fsl_port_stop,
1213 static const struct ata_port_info sata_fsl_port_info[] = {
1215 .flags = SATA_FSL_HOST_FLAGS,
1216 .pio_mask = 0x1f, /* pio 0-4 */
1217 .udma_mask = 0x7f, /* udma 0-6 */
1218 .port_ops = &sata_fsl_ops,
1222 static int sata_fsl_probe(struct of_device *ofdev,
1223 const struct of_device_id *match)
1226 void __iomem *hcr_base = NULL;
1227 void __iomem *ssr_base = NULL;
1228 void __iomem *csr_base = NULL;
1229 struct sata_fsl_host_priv *host_priv = NULL;
1231 struct ata_host *host;
1233 struct ata_port_info pi = sata_fsl_port_info[0];
1234 const struct ata_port_info *ppi[] = { &pi, NULL };
1236 dev_printk(KERN_INFO, &ofdev->dev,
1237 "Sata FSL Platform/CSB Driver init\n");
1239 hcr_base = of_iomap(ofdev->node, 0);
1241 goto error_exit_with_cleanup;
1243 ssr_base = hcr_base + 0x100;
1244 csr_base = hcr_base + 0x140;
1246 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
1247 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
1248 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
1250 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
1252 goto error_exit_with_cleanup;
1254 host_priv->hcr_base = hcr_base;
1255 host_priv->ssr_base = ssr_base;
1256 host_priv->csr_base = csr_base;
1258 irq = irq_of_parse_and_map(ofdev->node, 0);
1260 dev_printk(KERN_ERR, &ofdev->dev, "invalid irq from platform\n");
1261 goto error_exit_with_cleanup;
1263 host_priv->irq = irq;
1265 /* allocate host structure */
1266 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
1268 /* host->iomap is not used currently */
1269 host->private_data = host_priv;
1273 host->ports[0]->ioaddr.cmd_addr = host_priv->hcr_base;
1274 host->ports[0]->ioaddr.scr_addr = host_priv->ssr_base;
1276 /* initialize host controller */
1277 sata_fsl_init_controller(host);
1280 * Now, register with libATA core, this will also initiate the
1281 * device discovery process, invoking our port_start() handler &
1282 * error_handler() to execute a dummy Softreset EH session
1284 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
1287 dev_set_drvdata(&ofdev->dev, host);
1291 error_exit_with_cleanup:
1301 static int sata_fsl_remove(struct of_device *ofdev)
1303 struct ata_host *host = dev_get_drvdata(&ofdev->dev);
1304 struct sata_fsl_host_priv *host_priv = host->private_data;
1306 ata_host_detach(host);
1308 dev_set_drvdata(&ofdev->dev, NULL);
1310 irq_dispose_mapping(host_priv->irq);
1311 iounmap(host_priv->hcr_base);
1317 static struct of_device_id fsl_sata_match[] = {
1319 .compatible = "fsl,pq-sata",
1324 MODULE_DEVICE_TABLE(of, fsl_sata_match);
1326 static struct of_platform_driver fsl_sata_driver = {
1328 .match_table = fsl_sata_match,
1329 .probe = sata_fsl_probe,
1330 .remove = sata_fsl_remove,
1333 static int __init sata_fsl_init(void)
1335 of_register_platform_driver(&fsl_sata_driver);
1339 static void __exit sata_fsl_exit(void)
1341 of_unregister_platform_driver(&fsl_sata_driver);
1344 MODULE_LICENSE("GPL");
1345 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
1346 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
1347 MODULE_VERSION("1.10");
1349 module_init(sata_fsl_init);
1350 module_exit(sata_fsl_exit);