?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'for-f2fs-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk...
[linux-2.6.git] / drivers / ata / sata_fsl.c
blobd40e403e82dd259a34ab6a155a88619ba3b3542a
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_platform.h>
28
29 static unsigned int intr_coalescing_count;
30 module_param(intr_coalescing_count, int, S_IRUGO);
31 MODULE_PARM_DESC(intr_coalescing_count,
32 "INT coalescing count threshold (1..31)");
33
34 static unsigned int intr_coalescing_ticks;
35 module_param(intr_coalescing_ticks, int, S_IRUGO);
36 MODULE_PARM_DESC(intr_coalescing_ticks,
37 "INT coalescing timer threshold in AHB ticks");
38 /* Controller information */
39 enum {
40 SATA_FSL_QUEUE_DEPTH = 16,
41 SATA_FSL_MAX_PRD = 63,
42 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
43 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
44
45 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
46 ATA_FLAG_PMP | ATA_FLAG_NCQ | ATA_FLAG_AN),
47
48 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
49 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
50 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
51
52 /*
53 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
54 * chained indirect PRDEs up to a max count of 63.
55 * We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will
56 * be setup as an indirect descriptor, pointing to it's next
57 * (contiguous) PRDE. Though chained indirect PRDE arrays are
58 * supported,it will be more efficient to use a direct PRDT and
59 * a single chain/link to indirect PRDE array/PRDT.
60 */
61
62 SATA_FSL_CMD_DESC_CFIS_SZ = 32,
63 SATA_FSL_CMD_DESC_SFIS_SZ = 32,
64 SATA_FSL_CMD_DESC_ACMD_SZ = 16,
65 SATA_FSL_CMD_DESC_RSRVD = 16,
66
67 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
68 SATA_FSL_CMD_DESC_SFIS_SZ +
69 SATA_FSL_CMD_DESC_ACMD_SZ +
70 SATA_FSL_CMD_DESC_RSRVD +
71 SATA_FSL_MAX_PRD * 16),
72
73 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
74 (SATA_FSL_CMD_DESC_CFIS_SZ +
75 SATA_FSL_CMD_DESC_SFIS_SZ +
76 SATA_FSL_CMD_DESC_ACMD_SZ +
77 SATA_FSL_CMD_DESC_RSRVD),
78
79 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
80 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
81 SATA_FSL_CMD_DESC_AR_SZ),
82
83 /*
84 * MPC8315 has two SATA controllers, SATA1 & SATA2
85 * (one port per controller)
86 * MPC837x has 2/4 controllers, one port per controller
87 */
88
89 SATA_FSL_MAX_PORTS = 1,
90
91 SATA_FSL_IRQ_FLAG = IRQF_SHARED,
92 };
93
94 /*
95 * Interrupt Coalescing Control Register bitdefs */
96 enum {
97 ICC_MIN_INT_COUNT_THRESHOLD = 1,
98 ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1),
99 ICC_MIN_INT_TICKS_THRESHOLD = 0,
100 ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1),
101 ICC_SAFE_INT_TICKS = 1,
102 };
103
104 /*
105 * Host Controller command register set - per port
106 */
107 enum {
108 CQ = 0,
109 CA = 8,
110 CC = 0x10,
111 CE = 0x18,
112 DE = 0x20,
113 CHBA = 0x24,
114 HSTATUS = 0x28,
115 HCONTROL = 0x2C,
116 CQPMP = 0x30,
117 SIGNATURE = 0x34,
118 ICC = 0x38,
119
120 /*
121 * Host Status Register (HStatus) bitdefs
122 */
123 ONLINE = (1 << 31),
124 GOING_OFFLINE = (1 << 30),
125 BIST_ERR = (1 << 29),
126 CLEAR_ERROR = (1 << 27),
127
128 FATAL_ERR_HC_MASTER_ERR = (1 << 18),
129 FATAL_ERR_PARITY_ERR_TX = (1 << 17),
130 FATAL_ERR_PARITY_ERR_RX = (1 << 16),
131 FATAL_ERR_DATA_UNDERRUN = (1 << 13),
132 FATAL_ERR_DATA_OVERRUN = (1 << 12),
133 FATAL_ERR_CRC_ERR_TX = (1 << 11),
134 FATAL_ERR_CRC_ERR_RX = (1 << 10),
135 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
136 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
137
138 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
139 FATAL_ERR_PARITY_ERR_TX |
140 FATAL_ERR_PARITY_ERR_RX |
141 FATAL_ERR_DATA_UNDERRUN |
142 FATAL_ERR_DATA_OVERRUN |
143 FATAL_ERR_CRC_ERR_TX |
144 FATAL_ERR_CRC_ERR_RX |
145 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
146
147 INT_ON_DATA_LENGTH_MISMATCH = (1 << 12),
148 INT_ON_FATAL_ERR = (1 << 5),
149 INT_ON_PHYRDY_CHG = (1 << 4),
150
151 INT_ON_SIGNATURE_UPDATE = (1 << 3),
152 INT_ON_SNOTIFY_UPDATE = (1 << 2),
153 INT_ON_SINGL_DEVICE_ERR = (1 << 1),
154 INT_ON_CMD_COMPLETE = 1,
155
156 INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE |
157 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
158
159 /*
160 * Host Control Register (HControl) bitdefs
161 */
162 HCONTROL_ONLINE_PHY_RST = (1 << 31),
163 HCONTROL_FORCE_OFFLINE = (1 << 30),
164 HCONTROL_LEGACY = (1 << 28),
165 HCONTROL_PARITY_PROT_MOD = (1 << 14),
166 HCONTROL_DPATH_PARITY = (1 << 12),
167 HCONTROL_SNOOP_ENABLE = (1 << 10),
168 HCONTROL_PMP_ATTACHED = (1 << 9),
169 HCONTROL_COPYOUT_STATFIS = (1 << 8),
170 IE_ON_FATAL_ERR = (1 << 5),
171 IE_ON_PHYRDY_CHG = (1 << 4),
172 IE_ON_SIGNATURE_UPDATE = (1 << 3),
173 IE_ON_SNOTIFY_UPDATE = (1 << 2),
174 IE_ON_SINGL_DEVICE_ERR = (1 << 1),
175 IE_ON_CMD_COMPLETE = 1,
176
177 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
178 IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE |
179 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
180
181 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
182 DATA_SNOOP_ENABLE_V1 = (1 << 22),
183 DATA_SNOOP_ENABLE_V2 = (1 << 28),
184 };
185
186 /*
187 * SATA Superset Registers
188 */
189 enum {
190 SSTATUS = 0,
191 SERROR = 4,
192 SCONTROL = 8,
193 SNOTIFY = 0xC,
194 };
195
196 /*
197 * Control Status Register Set
198 */
199 enum {
200 TRANSCFG = 0,
201 TRANSSTATUS = 4,
202 LINKCFG = 8,
203 LINKCFG1 = 0xC,
204 LINKCFG2 = 0x10,
205 LINKSTATUS = 0x14,
206 LINKSTATUS1 = 0x18,
207 PHYCTRLCFG = 0x1C,
208 COMMANDSTAT = 0x20,
209 };
210
211 /* TRANSCFG (transport-layer) configuration control */
212 enum {
213 TRANSCFG_RX_WATER_MARK = (1 << 4),
214 };
215
216 /* PHY (link-layer) configuration control */
217 enum {
218 PHY_BIST_ENABLE = 0x01,
219 };
220
221 /*
222 * Command Header Table entry, i.e, command slot
223 * 4 Dwords per command slot, command header size == 64 Dwords.
224 */
225 struct cmdhdr_tbl_entry {
226 u32 cda;
227 u32 prde_fis_len;
228 u32 ttl;
229 u32 desc_info;
230 };
231
232 /*
233 * Description information bitdefs
234 */
235 enum {
236 CMD_DESC_RES = (1 << 11),
237 VENDOR_SPECIFIC_BIST = (1 << 10),
238 CMD_DESC_SNOOP_ENABLE = (1 << 9),
239 FPDMA_QUEUED_CMD = (1 << 8),
240 SRST_CMD = (1 << 7),
241 BIST = (1 << 6),
242 ATAPI_CMD = (1 << 5),
243 };
244
245 /*
246 * Command Descriptor
247 */
248 struct command_desc {
249 u8 cfis[8 * 4];
250 u8 sfis[8 * 4];
251 u8 acmd[4 * 4];
252 u8 fill[4 * 4];
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 u32 dba;
263 u8 fill[2 * 4];
264 u32 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
297 if (count > ICC_MAX_INT_COUNT_THRESHOLD)
298 count = ICC_MAX_INT_COUNT_THRESHOLD;
299 else if (count < ICC_MIN_INT_COUNT_THRESHOLD)
300 count = ICC_MIN_INT_COUNT_THRESHOLD;
301
302 if (ticks > ICC_MAX_INT_TICKS_THRESHOLD)
303 ticks = ICC_MAX_INT_TICKS_THRESHOLD;
304 else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) &&
305 (count > ICC_MIN_INT_COUNT_THRESHOLD))
306 ticks = ICC_SAFE_INT_TICKS;
307
308 spin_lock(&host->lock);
309 iowrite32((count << 24 | ticks), hcr_base + ICC);
310
311 intr_coalescing_count = count;
312 intr_coalescing_ticks = ticks;
313 spin_unlock(&host->lock);
314
315 DPRINTK("interrupt coalescing, count = 0x%x, ticks = %x\n",
316 intr_coalescing_count, intr_coalescing_ticks);
317 DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n",
318 hcr_base, ioread32(hcr_base + ICC));
319 }
320
321 static ssize_t fsl_sata_intr_coalescing_show(struct device *dev,
322 struct device_attribute *attr, char *buf)
323 {
324 return sprintf(buf, "%d %d\n",
325 intr_coalescing_count, intr_coalescing_ticks);
326 }
327
328 static ssize_t fsl_sata_intr_coalescing_store(struct device *dev,
329 struct device_attribute *attr,
330 const char *buf, size_t count)
331 {
332 unsigned int coalescing_count, coalescing_ticks;
333
334 if (sscanf(buf, "%d%d",
335 &coalescing_count,
336 &coalescing_ticks) != 2) {
337 printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
338 return -EINVAL;
339 }
340
341 fsl_sata_set_irq_coalescing(dev_get_drvdata(dev),
342 coalescing_count, coalescing_ticks);
343
344 return strlen(buf);
345 }
346
347 static ssize_t fsl_sata_rx_watermark_show(struct device *dev,
348 struct device_attribute *attr, char *buf)
349 {
350 unsigned int rx_watermark;
351 unsigned long flags;
352 struct ata_host *host = dev_get_drvdata(dev);
353 struct sata_fsl_host_priv *host_priv = host->private_data;
354 void __iomem *csr_base = host_priv->csr_base;
355
356 spin_lock_irqsave(&host->lock, flags);
357 rx_watermark = ioread32(csr_base + TRANSCFG);
358 rx_watermark &= 0x1f;
359
360 spin_unlock_irqrestore(&host->lock, flags);
361 return sprintf(buf, "%d\n", rx_watermark);
362 }
363
364 static ssize_t fsl_sata_rx_watermark_store(struct device *dev,
365 struct device_attribute *attr,
366 const char *buf, size_t count)
367 {
368 unsigned int rx_watermark;
369 unsigned long flags;
370 struct ata_host *host = dev_get_drvdata(dev);
371 struct sata_fsl_host_priv *host_priv = host->private_data;
372 void __iomem *csr_base = host_priv->csr_base;
373 u32 temp;
374
375 if (sscanf(buf, "%d", &rx_watermark) != 1) {
376 printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
377 return -EINVAL;
378 }
379
380 spin_lock_irqsave(&host->lock, flags);
381 temp = ioread32(csr_base + TRANSCFG);
382 temp &= 0xffffffe0;
383 iowrite32(temp | rx_watermark, csr_base + TRANSCFG);
384
385 spin_unlock_irqrestore(&host->lock, flags);
386 return strlen(buf);
387 }
388
389 static inline unsigned int sata_fsl_tag(unsigned int tag,
390 void __iomem *hcr_base)
391 {
392 /* We let libATA core do actual (queue) tag allocation */
393
394 /* all non NCQ/queued commands should have tag#0 */
395 if (ata_tag_internal(tag)) {
396 DPRINTK("mapping internal cmds to tag#0\n");
397 return 0;
398 }
399
400 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
401 DPRINTK("tag %d invalid : out of range\n", tag);
402 return 0;
403 }
404
405 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
406 DPRINTK("tag %d invalid : in use!!\n", tag);
407 return 0;
408 }
409
410 return tag;
411 }
412
413 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
414 unsigned int tag, u32 desc_info,
415 u32 data_xfer_len, u8 num_prde,
416 u8 fis_len)
417 {
418 dma_addr_t cmd_descriptor_address;
419
420 cmd_descriptor_address = pp->cmdentry_paddr +
421 tag * SATA_FSL_CMD_DESC_SIZE;
422
423 /* NOTE: both data_xfer_len & fis_len are Dword counts */
424
425 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
426 pp->cmdslot[tag].prde_fis_len =
427 cpu_to_le32((num_prde << 16) | (fis_len << 2));
428 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
429 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
430
431 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
432 pp->cmdslot[tag].cda,
433 pp->cmdslot[tag].prde_fis_len,
434 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
435
436 }
437
438 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
439 u32 *ttl, dma_addr_t cmd_desc_paddr,
440 int data_snoop)
441 {
442 struct scatterlist *sg;
443 unsigned int num_prde = 0;
444 u32 ttl_dwords = 0;
445
446 /*
447 * NOTE : direct & indirect prdt's are contiguously allocated
448 */
449 struct prde *prd = (struct prde *)&((struct command_desc *)
450 cmd_desc)->prdt;
451
452 struct prde *prd_ptr_to_indirect_ext = NULL;
453 unsigned indirect_ext_segment_sz = 0;
454 dma_addr_t indirect_ext_segment_paddr;
455 unsigned int si;
456
457 VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
458
459 indirect_ext_segment_paddr = cmd_desc_paddr +
460 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
461
462 for_each_sg(qc->sg, sg, qc->n_elem, si) {
463 dma_addr_t sg_addr = sg_dma_address(sg);
464 u32 sg_len = sg_dma_len(sg);
465
466 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n",
467 (unsigned long long)sg_addr, sg_len);
468
469 /* warn if each s/g element is not dword aligned */
470 if (unlikely(sg_addr & 0x03))
471 ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n",
472 (unsigned long long)sg_addr);
473 if (unlikely(sg_len & 0x03))
474 ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n",
475 sg_len);
476
477 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
478 sg_next(sg) != NULL) {
479 VPRINTK("setting indirect prde\n");
480 prd_ptr_to_indirect_ext = prd;
481 prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
482 indirect_ext_segment_sz = 0;
483 ++prd;
484 ++num_prde;
485 }
486
487 ttl_dwords += sg_len;
488 prd->dba = cpu_to_le32(sg_addr);
489 prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03));
490
491 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
492 ttl_dwords, prd->dba, prd->ddc_and_ext);
493
494 ++num_prde;
495 ++prd;
496 if (prd_ptr_to_indirect_ext)
497 indirect_ext_segment_sz += sg_len;
498 }
499
500 if (prd_ptr_to_indirect_ext) {
501 /* set indirect extension flag along with indirect ext. size */
502 prd_ptr_to_indirect_ext->ddc_and_ext =
503 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
504 data_snoop |
505 (indirect_ext_segment_sz & ~0x03)));
506 }
507
508 *ttl = ttl_dwords;
509 return num_prde;
510 }
511
512 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
513 {
514 struct ata_port *ap = qc->ap;
515 struct sata_fsl_port_priv *pp = ap->private_data;
516 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
517 void __iomem *hcr_base = host_priv->hcr_base;
518 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
519 struct command_desc *cd;
520 u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE;
521 u32 num_prde = 0;
522 u32 ttl_dwords = 0;
523 dma_addr_t cd_paddr;
524
525 cd = (struct command_desc *)pp->cmdentry + tag;
526 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
527
528 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis);
529
530 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
531 cd->cfis[0], cd->cfis[1], cd->cfis[2]);
532
533 if (qc->tf.protocol == ATA_PROT_NCQ) {
534 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
535 cd->cfis[3], cd->cfis[11]);
536 }
537
538 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
539 if (ata_is_atapi(qc->tf.protocol)) {
540 desc_info |= ATAPI_CMD;
541 memset((void *)&cd->acmd, 0, 32);
542 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
543 }
544
545 if (qc->flags & ATA_QCFLAG_DMAMAP)
546 num_prde = sata_fsl_fill_sg(qc, (void *)cd,
547 &ttl_dwords, cd_paddr,
548 host_priv->data_snoop);
549
550 if (qc->tf.protocol == ATA_PROT_NCQ)
551 desc_info |= FPDMA_QUEUED_CMD;
552
553 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
554 num_prde, 5);
555
556 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
557 desc_info, ttl_dwords, num_prde);
558 }
559
560 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
561 {
562 struct ata_port *ap = qc->ap;
563 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
564 void __iomem *hcr_base = host_priv->hcr_base;
565 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
566
567 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
568 ioread32(CQ + hcr_base),
569 ioread32(CA + hcr_base),
570 ioread32(CE + hcr_base), ioread32(CC + hcr_base));
571
572 iowrite32(qc->dev->link->pmp, CQPMP + hcr_base);
573
574 /* Simply queue command to the controller/device */
575 iowrite32(1 << tag, CQ + hcr_base);
576
577 VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
578 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
579
580 VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
581 ioread32(CE + hcr_base),
582 ioread32(DE + hcr_base),
583 ioread32(CC + hcr_base),
584 ioread32(COMMANDSTAT + host_priv->csr_base));
585
586 return 0;
587 }
588
589 static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
590 {
591 struct sata_fsl_port_priv *pp = qc->ap->private_data;
592 struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data;
593 void __iomem *hcr_base = host_priv->hcr_base;
594 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
595 struct command_desc *cd;
596
597 cd = pp->cmdentry + tag;
598
599 ata_tf_from_fis(cd->sfis, &qc->result_tf);
600 return true;
601 }
602
603 static int sata_fsl_scr_write(struct ata_link *link,
604 unsigned int sc_reg_in, u32 val)
605 {
606 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
607 void __iomem *ssr_base = host_priv->ssr_base;
608 unsigned int sc_reg;
609
610 switch (sc_reg_in) {
611 case SCR_STATUS:
612 case SCR_ERROR:
613 case SCR_CONTROL:
614 case SCR_ACTIVE:
615 sc_reg = sc_reg_in;
616 break;
617 default:
618 return -EINVAL;
619 }
620
621 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
622
623 iowrite32(val, ssr_base + (sc_reg * 4));
624 return 0;
625 }
626
627 static int sata_fsl_scr_read(struct ata_link *link,
628 unsigned int sc_reg_in, u32 *val)
629 {
630 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
631 void __iomem *ssr_base = host_priv->ssr_base;
632 unsigned int sc_reg;
633
634 switch (sc_reg_in) {
635 case SCR_STATUS:
636 case SCR_ERROR:
637 case SCR_CONTROL:
638 case SCR_ACTIVE:
639 sc_reg = sc_reg_in;
640 break;
641 default:
642 return -EINVAL;
643 }
644
645 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
646
647 *val = ioread32(ssr_base + (sc_reg * 4));
648 return 0;
649 }
650
651 static void sata_fsl_freeze(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 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
658 ioread32(CQ + hcr_base),
659 ioread32(CA + hcr_base),
660 ioread32(CE + hcr_base), ioread32(DE + hcr_base));
661 VPRINTK("CmdStat = 0x%x\n",
662 ioread32(host_priv->csr_base + COMMANDSTAT));
663
664 /* disable interrupts on the controller/port */
665 temp = ioread32(hcr_base + HCONTROL);
666 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
667
668 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
669 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
670 }
671
672 static void sata_fsl_thaw(struct ata_port *ap)
673 {
674 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
675 void __iomem *hcr_base = host_priv->hcr_base;
676 u32 temp;
677
678 /* ack. any pending IRQs for this controller/port */
679 temp = ioread32(hcr_base + HSTATUS);
680
681 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
682
683 if (temp & 0x3F)
684 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
685
686 /* enable interrupts on the controller/port */
687 temp = ioread32(hcr_base + HCONTROL);
688 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
689
690 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
691 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
692 }
693
694 static void sata_fsl_pmp_attach(struct ata_port *ap)
695 {
696 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
697 void __iomem *hcr_base = host_priv->hcr_base;
698 u32 temp;
699
700 temp = ioread32(hcr_base + HCONTROL);
701 iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL);
702 }
703
704 static void sata_fsl_pmp_detach(struct ata_port *ap)
705 {
706 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
707 void __iomem *hcr_base = host_priv->hcr_base;
708 u32 temp;
709
710 temp = ioread32(hcr_base + HCONTROL);
711 temp &= ~HCONTROL_PMP_ATTACHED;
712 iowrite32(temp, hcr_base + HCONTROL);
713
714 /* enable interrupts on the controller/port */
715 temp = ioread32(hcr_base + HCONTROL);
716 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
717
718 }
719
720 static int sata_fsl_port_start(struct ata_port *ap)
721 {
722 struct device *dev = ap->host->dev;
723 struct sata_fsl_port_priv *pp;
724 void *mem;
725 dma_addr_t mem_dma;
726 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
727 void __iomem *hcr_base = host_priv->hcr_base;
728 u32 temp;
729
730 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
731 if (!pp)
732 return -ENOMEM;
733
734 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
735 GFP_KERNEL);
736 if (!mem) {
737 kfree(pp);
738 return -ENOMEM;
739 }
740 memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
741
742 pp->cmdslot = mem;
743 pp->cmdslot_paddr = mem_dma;
744
745 mem += SATA_FSL_CMD_SLOT_SIZE;
746 mem_dma += SATA_FSL_CMD_SLOT_SIZE;
747
748 pp->cmdentry = mem;
749 pp->cmdentry_paddr = mem_dma;
750
751 ap->private_data = pp;
752
753 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
754 pp->cmdslot_paddr, pp->cmdentry_paddr);
755
756 /* Now, update the CHBA register in host controller cmd register set */
757 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
758
759 /*
760 * Now, we can bring the controller on-line & also initiate
761 * the COMINIT sequence, we simply return here and the boot-probing
762 * & device discovery process is re-initiated by libATA using a
763 * Softreset EH (dummy) session. Hence, boot probing and device
764 * discovey will be part of sata_fsl_softreset() callback.
765 */
766
767 temp = ioread32(hcr_base + HCONTROL);
768 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
769
770 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
771 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
772 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
773
774 #ifdef CONFIG_MPC8315_DS
775 /*
776 * Workaround for 8315DS board 3gbps link-up issue,
777 * currently limit SATA port to GEN1 speed
778 */
779 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
780 temp &= ~(0xF << 4);
781 temp |= (0x1 << 4);
782 sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp);
783
784 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
785 dev_warn(dev, "scr_control, speed limited to %x\n", temp);
786 #endif
787
788 return 0;
789 }
790
791 static void sata_fsl_port_stop(struct ata_port *ap)
792 {
793 struct device *dev = ap->host->dev;
794 struct sata_fsl_port_priv *pp = ap->private_data;
795 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
796 void __iomem *hcr_base = host_priv->hcr_base;
797 u32 temp;
798
799 /*
800 * Force host controller to go off-line, aborting current operations
801 */
802 temp = ioread32(hcr_base + HCONTROL);
803 temp &= ~HCONTROL_ONLINE_PHY_RST;
804 temp |= HCONTROL_FORCE_OFFLINE;
805 iowrite32(temp, hcr_base + HCONTROL);
806
807 /* Poll for controller to go offline - should happen immediately */
808 ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
809
810 ap->private_data = NULL;
811 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
812 pp->cmdslot, pp->cmdslot_paddr);
813
814 kfree(pp);
815 }
816
817 static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
818 {
819 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
820 void __iomem *hcr_base = host_priv->hcr_base;
821 struct ata_taskfile tf;
822 u32 temp;
823
824 temp = ioread32(hcr_base + SIGNATURE);
825
826 VPRINTK("raw sig = 0x%x\n", temp);
827 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
828 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
829
830 tf.lbah = (temp >> 24) & 0xff;
831 tf.lbam = (temp >> 16) & 0xff;
832 tf.lbal = (temp >> 8) & 0xff;
833 tf.nsect = temp & 0xff;
834
835 return ata_dev_classify(&tf);
836 }
837
838 static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
839 unsigned long deadline)
840 {
841 struct ata_port *ap = link->ap;
842 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
843 void __iomem *hcr_base = host_priv->hcr_base;
844 u32 temp;
845 int i = 0;
846 unsigned long start_jiffies;
847
848 DPRINTK("in xx_hardreset\n");
849
850 try_offline_again:
851 /*
852 * Force host controller to go off-line, aborting current operations
853 */
854 temp = ioread32(hcr_base + HCONTROL);
855 temp &= ~HCONTROL_ONLINE_PHY_RST;
856 iowrite32(temp, hcr_base + HCONTROL);
857
858 /* Poll for controller to go offline */
859 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE,
860 1, 500);
861
862 if (temp & ONLINE) {
863 ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i);
864
865 /*
866 * Try to offline controller atleast twice
867 */
868 i++;
869 if (i == 2)
870 goto err;
871 else
872 goto try_offline_again;
873 }
874
875 DPRINTK("hardreset, controller off-lined\n");
876 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
877 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
878
879 /*
880 * PHY reset should remain asserted for atleast 1ms
881 */
882 ata_msleep(ap, 1);
883
884 /*
885 * Now, bring the host controller online again, this can take time
886 * as PHY reset and communication establishment, 1st D2H FIS and
887 * device signature update is done, on safe side assume 500ms
888 * NOTE : Host online status may be indicated immediately!!
889 */
890
891 temp = ioread32(hcr_base + HCONTROL);
892 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
893 temp |= HCONTROL_PMP_ATTACHED;
894 iowrite32(temp, hcr_base + HCONTROL);
895
896 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500);
897
898 if (!(temp & ONLINE)) {
899 ata_port_err(ap, "Hardreset failed, not on-lined\n");
900 goto err;
901 }
902
903 DPRINTK("hardreset, controller off-lined & on-lined\n");
904 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
905 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
906
907 /*
908 * First, wait for the PHYRDY change to occur before waiting for
909 * the signature, and also verify if SStatus indicates device
910 * presence
911 */
912
913 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500);
914 if ((!(temp & 0x10)) || ata_link_offline(link)) {
915 ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n",
916 ioread32(hcr_base + HSTATUS));
917 *class = ATA_DEV_NONE;
918 return 0;
919 }
920
921 /*
922 * Wait for the first D2H from device,i.e,signature update notification
923 */
924 start_jiffies = jiffies;
925 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10,
926 500, jiffies_to_msecs(deadline - start_jiffies));
927
928 if ((temp & 0xFF) != 0x18) {
929 ata_port_warn(ap, "No Signature Update\n");
930 *class = ATA_DEV_NONE;
931 goto do_followup_srst;
932 } else {
933 ata_port_info(ap, "Signature Update detected @ %d msecs\n",
934 jiffies_to_msecs(jiffies - start_jiffies));
935 *class = sata_fsl_dev_classify(ap);
936 return 0;
937 }
938
939 do_followup_srst:
940 /*
941 * request libATA to perform follow-up softreset
942 */
943 return -EAGAIN;
944
945 err:
946 return -EIO;
947 }
948
949 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
950 unsigned long deadline)
951 {
952 struct ata_port *ap = link->ap;
953 struct sata_fsl_port_priv *pp = ap->private_data;
954 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
955 void __iomem *hcr_base = host_priv->hcr_base;
956 int pmp = sata_srst_pmp(link);
957 u32 temp;
958 struct ata_taskfile tf;
959 u8 *cfis;
960 u32 Serror;
961
962 DPRINTK("in xx_softreset\n");
963
964 if (ata_link_offline(link)) {
965 DPRINTK("PHY reports no device\n");
966 *class = ATA_DEV_NONE;
967 return 0;
968 }
969
970 /*
971 * Send a device reset (SRST) explicitly on command slot #0
972 * Check : will the command queue (reg) be cleared during offlining ??
973 * Also we will be online only if Phy commn. has been established
974 * and device presence has been detected, therefore if we have
975 * reached here, we can send a command to the target device
976 */
977
978 DPRINTK("Sending SRST/device reset\n");
979
980 ata_tf_init(link->device, &tf);
981 cfis = (u8 *) &pp->cmdentry->cfis;
982
983 /* device reset/SRST is a control register update FIS, uses tag0 */
984 sata_fsl_setup_cmd_hdr_entry(pp, 0,
985 SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
986
987 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
988 ata_tf_to_fis(&tf, pmp, 0, cfis);
989
990 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
991 cfis[0], cfis[1], cfis[2], cfis[3]);
992
993 /*
994 * Queue SRST command to the controller/device, ensure that no
995 * other commands are active on the controller/device
996 */
997
998 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
999 ioread32(CQ + hcr_base),
1000 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
1001
1002 iowrite32(0xFFFF, CC + hcr_base);
1003 if (pmp != SATA_PMP_CTRL_PORT)
1004 iowrite32(pmp, CQPMP + hcr_base);
1005 iowrite32(1, CQ + hcr_base);
1006
1007 temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000);
1008 if (temp & 0x1) {
1009 ata_port_warn(ap, "ATA_SRST issue failed\n");
1010
1011 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
1012 ioread32(CQ + hcr_base),
1013 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
1014
1015 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
1016
1017 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1018 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1019 DPRINTK("Serror = 0x%x\n", Serror);
1020 goto err;
1021 }
1022
1023 ata_msleep(ap, 1);
1024
1025 /*
1026 * SATA device enters reset state after receiving a Control register
1027 * FIS with SRST bit asserted and it awaits another H2D Control reg.
1028 * FIS with SRST bit cleared, then the device does internal diags &
1029 * initialization, followed by indicating it's initialization status
1030 * using ATA signature D2H register FIS to the host controller.
1031 */
1032
1033 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE,
1034 0, 0, 5);
1035
1036 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
1037 ata_tf_to_fis(&tf, pmp, 0, cfis);
1038
1039 if (pmp != SATA_PMP_CTRL_PORT)
1040 iowrite32(pmp, CQPMP + hcr_base);
1041 iowrite32(1, CQ + hcr_base);
1042 ata_msleep(ap, 150); /* ?? */
1043
1044 /*
1045 * The above command would have signalled an interrupt on command
1046 * complete, which needs special handling, by clearing the Nth
1047 * command bit of the CCreg
1048 */
1049 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
1050
1051 DPRINTK("SATA FSL : Now checking device signature\n");
1052
1053 *class = ATA_DEV_NONE;
1054
1055 /* Verify if SStatus indicates device presence */
1056 if (ata_link_online(link)) {
1057 /*
1058 * if we are here, device presence has been detected,
1059 * 1st D2H FIS would have been received, but sfis in
1060 * command desc. is not updated, but signature register
1061 * would have been updated
1062 */
1063
1064 *class = sata_fsl_dev_classify(ap);
1065
1066 DPRINTK("class = %d\n", *class);
1067 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
1068 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
1069 }
1070
1071 return 0;
1072
1073 err:
1074 return -EIO;
1075 }
1076
1077 static void sata_fsl_error_handler(struct ata_port *ap)
1078 {
1079
1080 DPRINTK("in xx_error_handler\n");
1081 sata_pmp_error_handler(ap);
1082
1083 }
1084
1085 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
1086 {
1087 if (qc->flags & ATA_QCFLAG_FAILED)
1088 qc->err_mask |= AC_ERR_OTHER;
1089
1090 if (qc->err_mask) {
1091 /* make DMA engine forget about the failed command */
1092
1093 }
1094 }
1095
1096 static void sata_fsl_error_intr(struct ata_port *ap)
1097 {
1098 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1099 void __iomem *hcr_base = host_priv->hcr_base;
1100 u32 hstatus, dereg=0, cereg = 0, SError = 0;
1101 unsigned int err_mask = 0, action = 0;
1102 int freeze = 0, abort=0;
1103 struct ata_link *link = NULL;
1104 struct ata_queued_cmd *qc = NULL;
1105 struct ata_eh_info *ehi;
1106
1107 hstatus = ioread32(hcr_base + HSTATUS);
1108 cereg = ioread32(hcr_base + CE);
1109
1110 /* first, analyze and record host port events */
1111 link = &ap->link;
1112 ehi = &link->eh_info;
1113 ata_ehi_clear_desc(ehi);
1114
1115 /*
1116 * Handle & Clear SError
1117 */
1118
1119 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1120 if (unlikely(SError & 0xFFFF0000))
1121 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
1122
1123 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
1124 hstatus, cereg, ioread32(hcr_base + DE), SError);
1125
1126 /* handle fatal errors */
1127 if (hstatus & FATAL_ERROR_DECODE) {
1128 ehi->err_mask |= AC_ERR_ATA_BUS;
1129 ehi->action |= ATA_EH_SOFTRESET;
1130
1131 freeze = 1;
1132 }
1133
1134 /* Handle SDB FIS receive & notify update */
1135 if (hstatus & INT_ON_SNOTIFY_UPDATE)
1136 sata_async_notification(ap);
1137
1138 /* Handle PHYRDY change notification */
1139 if (hstatus & INT_ON_PHYRDY_CHG) {
1140 DPRINTK("SATA FSL: PHYRDY change indication\n");
1141
1142 /* Setup a soft-reset EH action */
1143 ata_ehi_hotplugged(ehi);
1144 ata_ehi_push_desc(ehi, "%s", "PHY RDY changed");
1145 freeze = 1;
1146 }
1147
1148 /* handle single device errors */
1149 if (cereg) {
1150 /*
1151 * clear the command error, also clears queue to the device
1152 * in error, and we can (re)issue commands to this device.
1153 * When a device is in error all commands queued into the
1154 * host controller and at the device are considered aborted
1155 * and the queue for that device is stopped. Now, after
1156 * clearing the device error, we can issue commands to the
1157 * device to interrogate it to find the source of the error.
1158 */
1159 abort = 1;
1160
1161 DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
1162 ioread32(hcr_base + CE), ioread32(hcr_base + DE));
1163
1164 /* find out the offending link and qc */
1165 if (ap->nr_pmp_links) {
1166 unsigned int dev_num;
1167
1168 dereg = ioread32(hcr_base + DE);
1169 iowrite32(dereg, hcr_base + DE);
1170 iowrite32(cereg, hcr_base + CE);
1171
1172 dev_num = ffs(dereg) - 1;
1173 if (dev_num < ap->nr_pmp_links && dereg != 0) {
1174 link = &ap->pmp_link[dev_num];
1175 ehi = &link->eh_info;
1176 qc = ata_qc_from_tag(ap, link->active_tag);
1177 /*
1178 * We should consider this as non fatal error,
1179 * and TF must be updated as done below.
1180 */
1181
1182 err_mask |= AC_ERR_DEV;
1183
1184 } else {
1185 err_mask |= AC_ERR_HSM;
1186 action |= ATA_EH_HARDRESET;
1187 freeze = 1;
1188 }
1189 } else {
1190 dereg = ioread32(hcr_base + DE);
1191 iowrite32(dereg, hcr_base + DE);
1192 iowrite32(cereg, hcr_base + CE);
1193
1194 qc = ata_qc_from_tag(ap, link->active_tag);
1195 /*
1196 * We should consider this as non fatal error,
1197 * and TF must be updated as done below.
1198 */
1199 err_mask |= AC_ERR_DEV;
1200 }
1201 }
1202
1203 /* record error info */
1204 if (qc)
1205 qc->err_mask |= err_mask;
1206 else
1207 ehi->err_mask |= err_mask;
1208
1209 ehi->action |= action;
1210
1211 /* freeze or abort */
1212 if (freeze)
1213 ata_port_freeze(ap);
1214 else if (abort) {
1215 if (qc)
1216 ata_link_abort(qc->dev->link);
1217 else
1218 ata_port_abort(ap);
1219 }
1220 }
1221
1222 static void sata_fsl_host_intr(struct ata_port *ap)
1223 {
1224 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1225 void __iomem *hcr_base = host_priv->hcr_base;
1226 u32 hstatus, done_mask = 0;
1227 struct ata_queued_cmd *qc;
1228 u32 SError;
1229 u32 tag;
1230 u32 status_mask = INT_ON_ERROR;
1231
1232 hstatus = ioread32(hcr_base + HSTATUS);
1233
1234 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1235
1236 /* Read command completed register */
1237 done_mask = ioread32(hcr_base + CC);
1238
1239 /* Workaround for data length mismatch errata */
1240 if (unlikely(hstatus & INT_ON_DATA_LENGTH_MISMATCH)) {
1241 for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
1242 qc = ata_qc_from_tag(ap, tag);
1243 if (qc && ata_is_atapi(qc->tf.protocol)) {
1244 u32 hcontrol;
1245 /* Set HControl[27] to clear error registers */
1246 hcontrol = ioread32(hcr_base + HCONTROL);
1247 iowrite32(hcontrol | CLEAR_ERROR,
1248 hcr_base + HCONTROL);
1249
1250 /* Clear HControl[27] */
1251 iowrite32(hcontrol & ~CLEAR_ERROR,
1252 hcr_base + HCONTROL);
1253
1254 /* Clear SError[E] bit */
1255 sata_fsl_scr_write(&ap->link, SCR_ERROR,
1256 SError);
1257
1258 /* Ignore fatal error and device error */
1259 status_mask &= ~(INT_ON_SINGL_DEVICE_ERR
1260 | INT_ON_FATAL_ERR);
1261 break;
1262 }
1263 }
1264 }
1265
1266 if (unlikely(SError & 0xFFFF0000)) {
1267 DPRINTK("serror @host_intr : 0x%x\n", SError);
1268 sata_fsl_error_intr(ap);
1269 }
1270
1271 if (unlikely(hstatus & status_mask)) {
1272 DPRINTK("error interrupt!!\n");
1273 sata_fsl_error_intr(ap);
1274 return;
1275 }
1276
1277 VPRINTK("Status of all queues :\n");
1278 VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
1279 done_mask,
1280 ioread32(hcr_base + CA),
1281 ioread32(hcr_base + CE),
1282 ioread32(hcr_base + CQ),
1283 ap->qc_active);
1284
1285 if (done_mask & ap->qc_active) {
1286 int i;
1287 /* clear CC bit, this will also complete the interrupt */
1288 iowrite32(done_mask, hcr_base + CC);
1289
1290 DPRINTK("Status of all queues :\n");
1291 DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
1292 done_mask, ioread32(hcr_base + CA),
1293 ioread32(hcr_base + CE));
1294
1295 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
1296 if (done_mask & (1 << i))
1297 DPRINTK
1298 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
1299 i, ioread32(hcr_base + CC),
1300 ioread32(hcr_base + CA));
1301 }
1302 ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
1303 return;
1304
1305 } else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) {
1306 iowrite32(1, hcr_base + CC);
1307 qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1308
1309 DPRINTK("completing non-ncq cmd, CC=0x%x\n",
1310 ioread32(hcr_base + CC));
1311
1312 if (qc) {
1313 ata_qc_complete(qc);
1314 }
1315 } else {
1316 /* Spurious Interrupt!! */
1317 DPRINTK("spurious interrupt!!, CC = 0x%x\n",
1318 ioread32(hcr_base + CC));
1319 iowrite32(done_mask, hcr_base + CC);
1320 return;
1321 }
1322 }
1323
1324 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
1325 {
1326 struct ata_host *host = dev_instance;
1327 struct sata_fsl_host_priv *host_priv = host->private_data;
1328 void __iomem *hcr_base = host_priv->hcr_base;
1329 u32 interrupt_enables;
1330 unsigned handled = 0;
1331 struct ata_port *ap;
1332
1333 /* ack. any pending IRQs for this controller/port */
1334 interrupt_enables = ioread32(hcr_base + HSTATUS);
1335 interrupt_enables &= 0x3F;
1336
1337 DPRINTK("interrupt status 0x%x\n", interrupt_enables);
1338
1339 if (!interrupt_enables)
1340 return IRQ_NONE;
1341
1342 spin_lock(&host->lock);
1343
1344 /* Assuming one port per host controller */
1345
1346 ap = host->ports[0];
1347 if (ap) {
1348 sata_fsl_host_intr(ap);
1349 } else {
1350 dev_warn(host->dev, "interrupt on disabled port 0\n");
1351 }
1352
1353 iowrite32(interrupt_enables, hcr_base + HSTATUS);
1354 handled = 1;
1355
1356 spin_unlock(&host->lock);
1357
1358 return IRQ_RETVAL(handled);
1359 }
1360
1361 /*
1362 * Multiple ports are represented by multiple SATA controllers with
1363 * one port per controller
1364 */
1365 static int sata_fsl_init_controller(struct ata_host *host)
1366 {
1367 struct sata_fsl_host_priv *host_priv = host->private_data;
1368 void __iomem *hcr_base = host_priv->hcr_base;
1369 u32 temp;
1370
1371 /*
1372 * NOTE : We cannot bring the controller online before setting
1373 * the CHBA, hence main controller initialization is done as
1374 * part of the port_start() callback
1375 */
1376
1377 /* sata controller to operate in enterprise mode */
1378 temp = ioread32(hcr_base + HCONTROL);
1379 iowrite32(temp & ~HCONTROL_LEGACY, hcr_base + HCONTROL);
1380
1381 /* ack. any pending IRQs for this controller/port */
1382 temp = ioread32(hcr_base + HSTATUS);
1383 if (temp & 0x3F)
1384 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
1385
1386 /* Keep interrupts disabled on the controller */
1387 temp = ioread32(hcr_base + HCONTROL);
1388 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
1389
1390 /* Disable interrupt coalescing control(icc), for the moment */
1391 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
1392 iowrite32(0x01000000, hcr_base + ICC);
1393
1394 /* clear error registers, SError is cleared by libATA */
1395 iowrite32(0x00000FFFF, hcr_base + CE);
1396 iowrite32(0x00000FFFF, hcr_base + DE);
1397
1398 /*
1399 * reset the number of command complete bits which will cause the
1400 * interrupt to be signaled
1401 */
1402 fsl_sata_set_irq_coalescing(host, intr_coalescing_count,
1403 intr_coalescing_ticks);
1404
1405 /*
1406 * host controller will be brought on-line, during xx_port_start()
1407 * callback, that should also initiate the OOB, COMINIT sequence
1408 */
1409
1410 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1411 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1412
1413 return 0;
1414 }
1415
1416 /*
1417 * scsi mid-layer and libata interface structures
1418 */
1419 static struct scsi_host_template sata_fsl_sht = {
1420 ATA_NCQ_SHT("sata_fsl"),
1421 .can_queue = SATA_FSL_QUEUE_DEPTH,
1422 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
1423 .dma_boundary = ATA_DMA_BOUNDARY,
1424 };
1425
1426 static struct ata_port_operations sata_fsl_ops = {
1427 .inherits = &sata_pmp_port_ops,
1428
1429 .qc_defer = ata_std_qc_defer,
1430 .qc_prep = sata_fsl_qc_prep,
1431 .qc_issue = sata_fsl_qc_issue,
1432 .qc_fill_rtf = sata_fsl_qc_fill_rtf,
1433
1434 .scr_read = sata_fsl_scr_read,
1435 .scr_write = sata_fsl_scr_write,
1436
1437 .freeze = sata_fsl_freeze,
1438 .thaw = sata_fsl_thaw,
1439 .softreset = sata_fsl_softreset,
1440 .hardreset = sata_fsl_hardreset,
1441 .pmp_softreset = sata_fsl_softreset,
1442 .error_handler = sata_fsl_error_handler,
1443 .post_internal_cmd = sata_fsl_post_internal_cmd,
1444
1445 .port_start = sata_fsl_port_start,
1446 .port_stop = sata_fsl_port_stop,
1447
1448 .pmp_attach = sata_fsl_pmp_attach,
1449 .pmp_detach = sata_fsl_pmp_detach,
1450 };
1451
1452 static const struct ata_port_info sata_fsl_port_info[] = {
1453 {
1454 .flags = SATA_FSL_HOST_FLAGS,
1455 .pio_mask = ATA_PIO4,
1456 .udma_mask = ATA_UDMA6,
1457 .port_ops = &sata_fsl_ops,
1458 },
1459 };
1460
1461 static int sata_fsl_probe(struct platform_device *ofdev)
1462 {
1463 int retval = -ENXIO;
1464 void __iomem *hcr_base = NULL;
1465 void __iomem *ssr_base = NULL;
1466 void __iomem *csr_base = NULL;
1467 struct sata_fsl_host_priv *host_priv = NULL;
1468 int irq;
1469 struct ata_host *host = NULL;
1470 u32 temp;
1471
1472 struct ata_port_info pi = sata_fsl_port_info[0];
1473 const struct ata_port_info *ppi[] = { &pi, NULL };
1474
1475 dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n");
1476
1477 hcr_base = of_iomap(ofdev->dev.of_node, 0);
1478 if (!hcr_base)
1479 goto error_exit_with_cleanup;
1480
1481 ssr_base = hcr_base + 0x100;
1482 csr_base = hcr_base + 0x140;
1483
1484 if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) {
1485 temp = ioread32(csr_base + TRANSCFG);
1486 temp = temp & 0xffffffe0;
1487 iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG);
1488 }
1489
1490 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
1491 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
1492 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
1493
1494 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
1495 if (!host_priv)
1496 goto error_exit_with_cleanup;
1497
1498 host_priv->hcr_base = hcr_base;
1499 host_priv->ssr_base = ssr_base;
1500 host_priv->csr_base = csr_base;
1501
1502 irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
1503 if (irq < 0) {
1504 dev_err(&ofdev->dev, "invalid irq from platform\n");
1505 goto error_exit_with_cleanup;
1506 }
1507 host_priv->irq = irq;
1508
1509 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2"))
1510 host_priv->data_snoop = DATA_SNOOP_ENABLE_V2;
1511 else
1512 host_priv->data_snoop = DATA_SNOOP_ENABLE_V1;
1513
1514 /* allocate host structure */
1515 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
1516 if (!host) {
1517 retval = -ENOMEM;
1518 goto error_exit_with_cleanup;
1519 }
1520
1521 /* host->iomap is not used currently */
1522 host->private_data = host_priv;
1523
1524 /* initialize host controller */
1525 sata_fsl_init_controller(host);
1526
1527 /*
1528 * Now, register with libATA core, this will also initiate the
1529 * device discovery process, invoking our port_start() handler &
1530 * error_handler() to execute a dummy Softreset EH session
1531 */
1532 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
1533 &sata_fsl_sht);
1534
1535 dev_set_drvdata(&ofdev->dev, host);
1536
1537 host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show;
1538 host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store;
1539 sysfs_attr_init(&host_priv->intr_coalescing.attr);
1540 host_priv->intr_coalescing.attr.name = "intr_coalescing";
1541 host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR;
1542 retval = device_create_file(host->dev, &host_priv->intr_coalescing);
1543 if (retval)
1544 goto error_exit_with_cleanup;
1545
1546 host_priv->rx_watermark.show = fsl_sata_rx_watermark_show;
1547 host_priv->rx_watermark.store = fsl_sata_rx_watermark_store;
1548 sysfs_attr_init(&host_priv->rx_watermark.attr);
1549 host_priv->rx_watermark.attr.name = "rx_watermark";
1550 host_priv->rx_watermark.attr.mode = S_IRUGO | S_IWUSR;
1551 retval = device_create_file(host->dev, &host_priv->rx_watermark);
1552 if (retval) {
1553 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
1554 goto error_exit_with_cleanup;
1555 }
1556
1557 return 0;
1558
1559 error_exit_with_cleanup:
1560
1561 if (host) {
1562 dev_set_drvdata(&ofdev->dev, NULL);
1563 ata_host_detach(host);
1564 }
1565
1566 if (hcr_base)
1567 iounmap(hcr_base);
1568 kfree(host_priv);
1569
1570 return retval;
1571 }
1572
1573 static int sata_fsl_remove(struct platform_device *ofdev)
1574 {
1575 struct ata_host *host = dev_get_drvdata(&ofdev->dev);
1576 struct sata_fsl_host_priv *host_priv = host->private_data;
1577
1578 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
1579 device_remove_file(&ofdev->dev, &host_priv->rx_watermark);
1580
1581 ata_host_detach(host);
1582
1583 dev_set_drvdata(&ofdev->dev, NULL);
1584
1585 irq_dispose_mapping(host_priv->irq);
1586 iounmap(host_priv->hcr_base);
1587 kfree(host_priv);
1588
1589 return 0;
1590 }
1591
1592 #ifdef CONFIG_PM
1593 static int sata_fsl_suspend(struct platform_device *op, pm_message_t state)
1594 {
1595 struct ata_host *host = dev_get_drvdata(&op->dev);
1596 return ata_host_suspend(host, state);
1597 }
1598
1599 static int sata_fsl_resume(struct platform_device *op)
1600 {
1601 struct ata_host *host = dev_get_drvdata(&op->dev);
1602 struct sata_fsl_host_priv *host_priv = host->private_data;
1603 int ret;
1604 void __iomem *hcr_base = host_priv->hcr_base;
1605 struct ata_port *ap = host->ports[0];
1606 struct sata_fsl_port_priv *pp = ap->private_data;
1607
1608 ret = sata_fsl_init_controller(host);
1609 if (ret) {
1610 dev_err(&op->dev, "Error initializing hardware\n");
1611 return ret;
1612 }
1613
1614 /* Recovery the CHBA register in host controller cmd register set */
1615 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
1616
1617 iowrite32((ioread32(hcr_base + HCONTROL)
1618 | HCONTROL_ONLINE_PHY_RST
1619 | HCONTROL_SNOOP_ENABLE
1620 | HCONTROL_PMP_ATTACHED),
1621 hcr_base + HCONTROL);
1622
1623 ata_host_resume(host);
1624 return 0;
1625 }
1626 #endif
1627
1628 static struct of_device_id fsl_sata_match[] = {
1629 {
1630 .compatible = "fsl,pq-sata",
1631 },
1632 {
1633 .compatible = "fsl,pq-sata-v2",
1634 },
1635 {},
1636 };
1637
1638 MODULE_DEVICE_TABLE(of, fsl_sata_match);
1639
1640 static struct platform_driver fsl_sata_driver = {
1641 .driver = {
1642 .name = "fsl-sata",
1643 .owner = THIS_MODULE,
1644 .of_match_table = fsl_sata_match,
1645 },
1646 .probe = sata_fsl_probe,
1647 .remove = sata_fsl_remove,
1648 #ifdef CONFIG_PM
1649 .suspend = sata_fsl_suspend,
1650 .resume = sata_fsl_resume,
1651 #endif
1652 };
1653
1654 module_platform_driver(fsl_sata_driver);
1655
1656 MODULE_LICENSE("GPL");
1657 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
1658 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
1659 MODULE_VERSION("1.10");
Linus' kernel tree