1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/ata/sata_fsl.c
4 *
5 * Freescale 3.0Gbps SATA device driver
6 *
7 * Author: Ashish Kalra <ashish.kalra@freescale.com>
8 * Li Yang <leoli@freescale.com>
9 *
10 * Copyright (c) 2006-2007, 2011-2012 Freescale Semiconductor, Inc.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_cmnd.h>
20 #include <linux/libata.h>
21 #include <asm/io.h>
22 #include <linux/of_address.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_platform.h>
25
26 static unsigned int intr_coalescing_count;
27 module_param(intr_coalescing_count, int, S_IRUGO);
28 MODULE_PARM_DESC(intr_coalescing_count,
29 "INT coalescing count threshold (1..31)");
30
31 static unsigned int intr_coalescing_ticks;
32 module_param(intr_coalescing_ticks, int, S_IRUGO);
33 MODULE_PARM_DESC(intr_coalescing_ticks,
34 "INT coalescing timer threshold in AHB ticks");
35 /* Controller information */
36 enum {
37 SATA_FSL_QUEUE_DEPTH = 16,
38 SATA_FSL_MAX_PRD = 63,
39 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
40 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
41
42 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
43 ATA_FLAG_PMP | ATA_FLAG_NCQ |
44 ATA_FLAG_AN | ATA_FLAG_NO_LOG_PAGE),
45
46 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
47 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
48 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
49
50 /*
51 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
52 * chained indirect PRDEs up to a max count of 63.
53 * We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will
54 * be setup as an indirect descriptor, pointing to it's next
55 * (contiguous) PRDE. Though chained indirect PRDE arrays are
56 * supported,it will be more efficient to use a direct PRDT and
57 * a single chain/link to indirect PRDE array/PRDT.
58 */
59
60 SATA_FSL_CMD_DESC_CFIS_SZ = 32,
61 SATA_FSL_CMD_DESC_SFIS_SZ = 32,
62 SATA_FSL_CMD_DESC_ACMD_SZ = 16,
63 SATA_FSL_CMD_DESC_RSRVD = 16,
64
65 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
66 SATA_FSL_CMD_DESC_SFIS_SZ +
67 SATA_FSL_CMD_DESC_ACMD_SZ +
68 SATA_FSL_CMD_DESC_RSRVD +
69 SATA_FSL_MAX_PRD * 16),
70
71 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
72 (SATA_FSL_CMD_DESC_CFIS_SZ +
73 SATA_FSL_CMD_DESC_SFIS_SZ +
74 SATA_FSL_CMD_DESC_ACMD_SZ +
75 SATA_FSL_CMD_DESC_RSRVD),
76
77 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
78 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
79 SATA_FSL_CMD_DESC_AR_SZ),
80
81 /*
82 * MPC8315 has two SATA controllers, SATA1 & SATA2
83 * (one port per controller)
84 * MPC837x has 2/4 controllers, one port per controller
85 */
86
87 SATA_FSL_MAX_PORTS = 1,
88
89 SATA_FSL_IRQ_FLAG = IRQF_SHARED,
90 };
91
92 /*
93 * Interrupt Coalescing Control Register bitdefs */
94 enum {
95 ICC_MIN_INT_COUNT_THRESHOLD = 1,
96 ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1),
97 ICC_MIN_INT_TICKS_THRESHOLD = 0,
98 ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1),
99 ICC_SAFE_INT_TICKS = 1,
100 };
101
102 /*
103 * Host Controller command register set - per port
104 */
105 enum {
106 CQ = 0,
107 CA = 8,
108 CC = 0x10,
109 CE = 0x18,
110 DE = 0x20,
111 CHBA = 0x24,
112 HSTATUS = 0x28,
113 HCONTROL = 0x2C,
114 CQPMP = 0x30,
115 SIGNATURE = 0x34,
116 ICC = 0x38,
117
118 /*
119 * Host Status Register (HStatus) bitdefs
120 */
121 ONLINE = (1 << 31),
122 GOING_OFFLINE = (1 << 30),
123 BIST_ERR = (1 << 29),
124 CLEAR_ERROR = (1 << 27),
125
126 FATAL_ERR_HC_MASTER_ERR = (1 << 18),
127 FATAL_ERR_PARITY_ERR_TX = (1 << 17),
128 FATAL_ERR_PARITY_ERR_RX = (1 << 16),
129 FATAL_ERR_DATA_UNDERRUN = (1 << 13),
130 FATAL_ERR_DATA_OVERRUN = (1 << 12),
131 FATAL_ERR_CRC_ERR_TX = (1 << 11),
132 FATAL_ERR_CRC_ERR_RX = (1 << 10),
133 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
134 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
135
136 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
137 FATAL_ERR_PARITY_ERR_TX |
138 FATAL_ERR_PARITY_ERR_RX |
139 FATAL_ERR_DATA_UNDERRUN |
140 FATAL_ERR_DATA_OVERRUN |
141 FATAL_ERR_CRC_ERR_TX |
142 FATAL_ERR_CRC_ERR_RX |
143 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
144
145 INT_ON_DATA_LENGTH_MISMATCH = (1 << 12),
146 INT_ON_FATAL_ERR = (1 << 5),
147 INT_ON_PHYRDY_CHG = (1 << 4),
148
149 INT_ON_SIGNATURE_UPDATE = (1 << 3),
150 INT_ON_SNOTIFY_UPDATE = (1 << 2),
151 INT_ON_SINGL_DEVICE_ERR = (1 << 1),
152 INT_ON_CMD_COMPLETE = 1,
153
154 INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE |
155 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
156
157 /*
158 * Host Control Register (HControl) bitdefs
159 */
160 HCONTROL_ONLINE_PHY_RST = (1 << 31),
161 HCONTROL_FORCE_OFFLINE = (1 << 30),
162 HCONTROL_LEGACY = (1 << 28),
163 HCONTROL_PARITY_PROT_MOD = (1 << 14),
164 HCONTROL_DPATH_PARITY = (1 << 12),
165 HCONTROL_SNOOP_ENABLE = (1 << 10),
166 HCONTROL_PMP_ATTACHED = (1 << 9),
167 HCONTROL_COPYOUT_STATFIS = (1 << 8),
168 IE_ON_FATAL_ERR = (1 << 5),
169 IE_ON_PHYRDY_CHG = (1 << 4),
170 IE_ON_SIGNATURE_UPDATE = (1 << 3),
171 IE_ON_SNOTIFY_UPDATE = (1 << 2),
172 IE_ON_SINGL_DEVICE_ERR = (1 << 1),
173 IE_ON_CMD_COMPLETE = 1,
174
175 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
176 IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE |
177 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
178
179 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
180 DATA_SNOOP_ENABLE_V1 = (1 << 22),
181 DATA_SNOOP_ENABLE_V2 = (1 << 28),
182 };
183
184 /*
185 * SATA Superset Registers
186 */
187 enum {
188 SSTATUS = 0,
189 SERROR = 4,
190 SCONTROL = 8,
191 SNOTIFY = 0xC,
192 };
193
194 /*
195 * Control Status Register Set
196 */
197 enum {
198 TRANSCFG = 0,
199 TRANSSTATUS = 4,
200 LINKCFG = 8,
201 LINKCFG1 = 0xC,
202 LINKCFG2 = 0x10,
203 LINKSTATUS = 0x14,
204 LINKSTATUS1 = 0x18,
205 PHYCTRLCFG = 0x1C,
206 COMMANDSTAT = 0x20,
207 };
208
209 /* TRANSCFG (transport-layer) configuration control */
210 enum {
211 TRANSCFG_RX_WATER_MARK = (1 << 4),
212 };
213
214 /* PHY (link-layer) configuration control */
215 enum {
216 PHY_BIST_ENABLE = 0x01,
217 };
218
219 /*
220 * Command Header Table entry, i.e, command slot
221 * 4 Dwords per command slot, command header size == 64 Dwords.
222 */
223 struct cmdhdr_tbl_entry {
224 u32 cda;
225 u32 prde_fis_len;
226 u32 ttl;
227 u32 desc_info;
228 };
229
230 /*
231 * Description information bitdefs
232 */
233 enum {
234 CMD_DESC_RES = (1 << 11),
235 VENDOR_SPECIFIC_BIST = (1 << 10),
236 CMD_DESC_SNOOP_ENABLE = (1 << 9),
237 FPDMA_QUEUED_CMD = (1 << 8),
238 SRST_CMD = (1 << 7),
239 BIST = (1 << 6),
240 ATAPI_CMD = (1 << 5),
241 };
242
243 /*
244 * Command Descriptor
245 */
246 struct command_desc {
247 u8 cfis[8 * 4];
248 u8 sfis[8 * 4];
249 u8 acmd[4 * 4];
250 u8 fill[4 * 4];
251 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
252 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
253 };
254
255 /*
256 * Physical region table descriptor(PRD)
257 */
258
259 struct prde {
260 u32 dba;
261 u8 fill[2 * 4];
262 u32 ddc_and_ext;
263 };
264
265 /*
266 * ata_port private data
267 * This is our per-port instance data.
268 */
269 struct sata_fsl_port_priv {
270 struct cmdhdr_tbl_entry *cmdslot;
271 dma_addr_t cmdslot_paddr;
272 struct command_desc *cmdentry;
273 dma_addr_t cmdentry_paddr;
274 };
275
276 /*
277 * ata_port->host_set private data
278 */
279 struct sata_fsl_host_priv {
280 void __iomem *hcr_base;
281 void __iomem *ssr_base;
282 void __iomem *csr_base;
283 int irq;
284 int data_snoop;
285 struct device_attribute intr_coalescing;
286 struct device_attribute rx_watermark;
287 };
288
fsl_sata_set_irq_coalescing(struct ata_host * host,unsigned int count,unsigned int ticks)289 static void fsl_sata_set_irq_coalescing(struct ata_host *host,
290 unsigned int count, unsigned int ticks)
291 {
292 struct sata_fsl_host_priv *host_priv = host->private_data;
293 void __iomem *hcr_base = host_priv->hcr_base;
294 unsigned long flags;
295
296 if (count > ICC_MAX_INT_COUNT_THRESHOLD)
297 count = ICC_MAX_INT_COUNT_THRESHOLD;
298 else if (count < ICC_MIN_INT_COUNT_THRESHOLD)
299 count = ICC_MIN_INT_COUNT_THRESHOLD;
300
301 if (ticks > ICC_MAX_INT_TICKS_THRESHOLD)
302 ticks = ICC_MAX_INT_TICKS_THRESHOLD;
303 else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) &&
304 (count > ICC_MIN_INT_COUNT_THRESHOLD))
305 ticks = ICC_SAFE_INT_TICKS;
306
307 spin_lock_irqsave(&host->lock, flags);
308 iowrite32((count << 24 | ticks), hcr_base + ICC);
309
310 intr_coalescing_count = count;
311 intr_coalescing_ticks = ticks;
312 spin_unlock_irqrestore(&host->lock, flags);
313
314 DPRINTK("interrupt coalescing, count = 0x%x, ticks = %x\n",
315 intr_coalescing_count, intr_coalescing_ticks);
316 DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n",
317 hcr_base, ioread32(hcr_base + ICC));
318 }
319
fsl_sata_intr_coalescing_show(struct device * dev,struct device_attribute * attr,char * buf)320 static ssize_t fsl_sata_intr_coalescing_show(struct device *dev,
321 struct device_attribute *attr, char *buf)
322 {
323 return sprintf(buf, "%d %d\n",
324 intr_coalescing_count, intr_coalescing_ticks);
325 }
326
fsl_sata_intr_coalescing_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)327 static ssize_t fsl_sata_intr_coalescing_store(struct device *dev,
328 struct device_attribute *attr,
329 const char *buf, size_t count)
330 {
331 unsigned int coalescing_count, coalescing_ticks;
332
333 if (sscanf(buf, "%d%d",
334 &coalescing_count,
335 &coalescing_ticks) != 2) {
336 printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
337 return -EINVAL;
338 }
339
340 fsl_sata_set_irq_coalescing(dev_get_drvdata(dev),
341 coalescing_count, coalescing_ticks);
342
343 return strlen(buf);
344 }
345
fsl_sata_rx_watermark_show(struct device * dev,struct device_attribute * attr,char * buf)346 static ssize_t fsl_sata_rx_watermark_show(struct device *dev,
347 struct device_attribute *attr, char *buf)
348 {
349 unsigned int rx_watermark;
350 unsigned long flags;
351 struct ata_host *host = dev_get_drvdata(dev);
352 struct sata_fsl_host_priv *host_priv = host->private_data;
353 void __iomem *csr_base = host_priv->csr_base;
354
355 spin_lock_irqsave(&host->lock, flags);
356 rx_watermark = ioread32(csr_base + TRANSCFG);
357 rx_watermark &= 0x1f;
358
359 spin_unlock_irqrestore(&host->lock, flags);
360 return sprintf(buf, "%d\n", rx_watermark);
361 }
362
fsl_sata_rx_watermark_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)363 static ssize_t fsl_sata_rx_watermark_store(struct device *dev,
364 struct device_attribute *attr,
365 const char *buf, size_t count)
366 {
367 unsigned int rx_watermark;
368 unsigned long flags;
369 struct ata_host *host = dev_get_drvdata(dev);
370 struct sata_fsl_host_priv *host_priv = host->private_data;
371 void __iomem *csr_base = host_priv->csr_base;
372 u32 temp;
373
374 if (sscanf(buf, "%d", &rx_watermark) != 1) {
375 printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
376 return -EINVAL;
377 }
378
379 spin_lock_irqsave(&host->lock, flags);
380 temp = ioread32(csr_base + TRANSCFG);
381 temp &= 0xffffffe0;
382 iowrite32(temp | rx_watermark, csr_base + TRANSCFG);
383
384 spin_unlock_irqrestore(&host->lock, flags);
385 return strlen(buf);
386 }
387
sata_fsl_tag(unsigned int tag,void __iomem * hcr_base)388 static inline unsigned int sata_fsl_tag(unsigned int tag,
389 void __iomem *hcr_base)
390 {
391 /* We let libATA core do actual (queue) tag allocation */
392
393 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
394 DPRINTK("tag %d invalid : out of range\n", tag);
395 return 0;
396 }
397
398 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
399 DPRINTK("tag %d invalid : in use!!\n", tag);
400 return 0;
401 }
402
403 return tag;
404 }
405
sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv * pp,unsigned int tag,u32 desc_info,u32 data_xfer_len,u8 num_prde,u8 fis_len)406 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
407 unsigned int tag, u32 desc_info,
408 u32 data_xfer_len, u8 num_prde,
409 u8 fis_len)
410 {
411 dma_addr_t cmd_descriptor_address;
412
413 cmd_descriptor_address = pp->cmdentry_paddr +
414 tag * SATA_FSL_CMD_DESC_SIZE;
415
416 /* NOTE: both data_xfer_len & fis_len are Dword counts */
417
418 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
419 pp->cmdslot[tag].prde_fis_len =
420 cpu_to_le32((num_prde << 16) | (fis_len << 2));
421 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
422 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
423
424 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
425 pp->cmdslot[tag].cda,
426 pp->cmdslot[tag].prde_fis_len,
427 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
428
429 }
430
sata_fsl_fill_sg(struct ata_queued_cmd * qc,void * cmd_desc,u32 * ttl,dma_addr_t cmd_desc_paddr,int data_snoop)431 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
432 u32 *ttl, dma_addr_t cmd_desc_paddr,
433 int data_snoop)
434 {
435 struct scatterlist *sg;
436 unsigned int num_prde = 0;
437 u32 ttl_dwords = 0;
438
439 /*
440 * NOTE : direct & indirect prdt's are contiguously allocated
441 */
442 struct prde *prd = (struct prde *)&((struct command_desc *)
443 cmd_desc)->prdt;
444
445 struct prde *prd_ptr_to_indirect_ext = NULL;
446 unsigned indirect_ext_segment_sz = 0;
447 dma_addr_t indirect_ext_segment_paddr;
448 unsigned int si;
449
450 VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
451
452 indirect_ext_segment_paddr = cmd_desc_paddr +
453 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
454
455 for_each_sg(qc->sg, sg, qc->n_elem, si) {
456 dma_addr_t sg_addr = sg_dma_address(sg);
457 u32 sg_len = sg_dma_len(sg);
458
459 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n",
460 (unsigned long long)sg_addr, sg_len);
461
462 /* warn if each s/g element is not dword aligned */
463 if (unlikely(sg_addr & 0x03))
464 ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n",
465 (unsigned long long)sg_addr);
466 if (unlikely(sg_len & 0x03))
467 ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n",
468 sg_len);
469
470 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
471 sg_next(sg) != NULL) {
472 VPRINTK("setting indirect prde\n");
473 prd_ptr_to_indirect_ext = prd;
474 prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
475 indirect_ext_segment_sz = 0;
476 ++prd;
477 ++num_prde;
478 }
479
480 ttl_dwords += sg_len;
481 prd->dba = cpu_to_le32(sg_addr);
482 prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03));
483
484 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
485 ttl_dwords, prd->dba, prd->ddc_and_ext);
486
487 ++num_prde;
488 ++prd;
489 if (prd_ptr_to_indirect_ext)
490 indirect_ext_segment_sz += sg_len;
491 }
492
493 if (prd_ptr_to_indirect_ext) {
494 /* set indirect extension flag along with indirect ext. size */
495 prd_ptr_to_indirect_ext->ddc_and_ext =
496 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
497 data_snoop |
498 (indirect_ext_segment_sz & ~0x03)));
499 }
500
501 *ttl = ttl_dwords;
502 return num_prde;
503 }
504
sata_fsl_qc_prep(struct ata_queued_cmd * qc)505 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
506 {
507 struct ata_port *ap = qc->ap;
508 struct sata_fsl_port_priv *pp = ap->private_data;
509 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
510 void __iomem *hcr_base = host_priv->hcr_base;
511 unsigned int tag = sata_fsl_tag(qc->hw_tag, hcr_base);
512 struct command_desc *cd;
513 u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE;
514 u32 num_prde = 0;
515 u32 ttl_dwords = 0;
516 dma_addr_t cd_paddr;
517
518 cd = (struct command_desc *)pp->cmdentry + tag;
519 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
520
521 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis);
522
523 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
524 cd->cfis[0], cd->cfis[1], cd->cfis[2]);
525
526 if (qc->tf.protocol == ATA_PROT_NCQ) {
527 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
528 cd->cfis[3], cd->cfis[11]);
529 }
530
531 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
532 if (ata_is_atapi(qc->tf.protocol)) {
533 desc_info |= ATAPI_CMD;
534 memset((void *)&cd->acmd, 0, 32);
535 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
536 }
537
538 if (qc->flags & ATA_QCFLAG_DMAMAP)
539 num_prde = sata_fsl_fill_sg(qc, (void *)cd,
540 &ttl_dwords, cd_paddr,
541 host_priv->data_snoop);
542
543 if (qc->tf.protocol == ATA_PROT_NCQ)
544 desc_info |= FPDMA_QUEUED_CMD;
545
546 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
547 num_prde, 5);
548
549 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
550 desc_info, ttl_dwords, num_prde);
551 }
552
sata_fsl_qc_issue(struct ata_queued_cmd * qc)553 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
554 {
555 struct ata_port *ap = qc->ap;
556 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
557 void __iomem *hcr_base = host_priv->hcr_base;
558 unsigned int tag = sata_fsl_tag(qc->hw_tag, hcr_base);
559
560 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
561 ioread32(CQ + hcr_base),
562 ioread32(CA + hcr_base),
563 ioread32(CE + hcr_base), ioread32(CC + hcr_base));
564
565 iowrite32(qc->dev->link->pmp, CQPMP + hcr_base);
566
567 /* Simply queue command to the controller/device */
568 iowrite32(1 << tag, CQ + hcr_base);
569
570 VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
571 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
572
573 VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
574 ioread32(CE + hcr_base),
575 ioread32(DE + hcr_base),
576 ioread32(CC + hcr_base),
577 ioread32(COMMANDSTAT + host_priv->csr_base));
578
579 return 0;
580 }
581
sata_fsl_qc_fill_rtf(struct ata_queued_cmd * qc)582 static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
583 {
584 struct sata_fsl_port_priv *pp = qc->ap->private_data;
585 struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data;
586 void __iomem *hcr_base = host_priv->hcr_base;
587 unsigned int tag = sata_fsl_tag(qc->hw_tag, hcr_base);
588 struct command_desc *cd;
589
590 cd = pp->cmdentry + tag;
591
592 ata_tf_from_fis(cd->sfis, &qc->result_tf);
593 return true;
594 }
595
sata_fsl_scr_write(struct ata_link * link,unsigned int sc_reg_in,u32 val)596 static int sata_fsl_scr_write(struct ata_link *link,
597 unsigned int sc_reg_in, u32 val)
598 {
599 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
600 void __iomem *ssr_base = host_priv->ssr_base;
601 unsigned int sc_reg;
602
603 switch (sc_reg_in) {
604 case SCR_STATUS:
605 case SCR_ERROR:
606 case SCR_CONTROL:
607 case SCR_ACTIVE:
608 sc_reg = sc_reg_in;
609 break;
610 default:
611 return -EINVAL;
612 }
613
614 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
615
616 iowrite32(val, ssr_base + (sc_reg * 4));
617 return 0;
618 }
619
sata_fsl_scr_read(struct ata_link * link,unsigned int sc_reg_in,u32 * val)620 static int sata_fsl_scr_read(struct ata_link *link,
621 unsigned int sc_reg_in, u32 *val)
622 {
623 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
624 void __iomem *ssr_base = host_priv->ssr_base;
625 unsigned int sc_reg;
626
627 switch (sc_reg_in) {
628 case SCR_STATUS:
629 case SCR_ERROR:
630 case SCR_CONTROL:
631 case SCR_ACTIVE:
632 sc_reg = sc_reg_in;
633 break;
634 default:
635 return -EINVAL;
636 }
637
638 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
639
640 *val = ioread32(ssr_base + (sc_reg * 4));
641 return 0;
642 }
643
sata_fsl_freeze(struct ata_port * ap)644 static void sata_fsl_freeze(struct ata_port *ap)
645 {
646 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
647 void __iomem *hcr_base = host_priv->hcr_base;
648 u32 temp;
649
650 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
651 ioread32(CQ + hcr_base),
652 ioread32(CA + hcr_base),
653 ioread32(CE + hcr_base), ioread32(DE + hcr_base));
654 VPRINTK("CmdStat = 0x%x\n",
655 ioread32(host_priv->csr_base + COMMANDSTAT));
656
657 /* disable interrupts on the controller/port */
658 temp = ioread32(hcr_base + HCONTROL);
659 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
660
661 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
662 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
663 }
664
sata_fsl_thaw(struct ata_port * ap)665 static void sata_fsl_thaw(struct ata_port *ap)
666 {
667 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
668 void __iomem *hcr_base = host_priv->hcr_base;
669 u32 temp;
670
671 /* ack. any pending IRQs for this controller/port */
672 temp = ioread32(hcr_base + HSTATUS);
673
674 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
675
676 if (temp & 0x3F)
677 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
678
679 /* enable interrupts on the controller/port */
680 temp = ioread32(hcr_base + HCONTROL);
681 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
682
683 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
684 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
685 }
686
sata_fsl_pmp_attach(struct ata_port * ap)687 static void sata_fsl_pmp_attach(struct ata_port *ap)
688 {
689 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
690 void __iomem *hcr_base = host_priv->hcr_base;
691 u32 temp;
692
693 temp = ioread32(hcr_base + HCONTROL);
694 iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL);
695 }
696
sata_fsl_pmp_detach(struct ata_port * ap)697 static void sata_fsl_pmp_detach(struct ata_port *ap)
698 {
699 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
700 void __iomem *hcr_base = host_priv->hcr_base;
701 u32 temp;
702
703 temp = ioread32(hcr_base + HCONTROL);
704 temp &= ~HCONTROL_PMP_ATTACHED;
705 iowrite32(temp, hcr_base + HCONTROL);
706
707 /* enable interrupts on the controller/port */
708 temp = ioread32(hcr_base + HCONTROL);
709 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
710
711 }
712
sata_fsl_port_start(struct ata_port * ap)713 static int sata_fsl_port_start(struct ata_port *ap)
714 {
715 struct device *dev = ap->host->dev;
716 struct sata_fsl_port_priv *pp;
717 void *mem;
718 dma_addr_t mem_dma;
719 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
720 void __iomem *hcr_base = host_priv->hcr_base;
721 u32 temp;
722
723 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
724 if (!pp)
725 return -ENOMEM;
726
727 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
728 GFP_KERNEL);
729 if (!mem) {
730 kfree(pp);
731 return -ENOMEM;
732 }
733
734 pp->cmdslot = mem;
735 pp->cmdslot_paddr = mem_dma;
736
737 mem += SATA_FSL_CMD_SLOT_SIZE;
738 mem_dma += SATA_FSL_CMD_SLOT_SIZE;
739
740 pp->cmdentry = mem;
741 pp->cmdentry_paddr = mem_dma;
742
743 ap->private_data = pp;
744
745 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
746 pp->cmdslot_paddr, pp->cmdentry_paddr);
747
748 /* Now, update the CHBA register in host controller cmd register set */
749 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
750
751 /*
752 * Now, we can bring the controller on-line & also initiate
753 * the COMINIT sequence, we simply return here and the boot-probing
754 * & device discovery process is re-initiated by libATA using a
755 * Softreset EH (dummy) session. Hence, boot probing and device
756 * discovey will be part of sata_fsl_softreset() callback.
757 */
758
759 temp = ioread32(hcr_base + HCONTROL);
760 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
761
762 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
763 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
764 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
765
766 return 0;
767 }
768
sata_fsl_port_stop(struct ata_port * ap)769 static void sata_fsl_port_stop(struct ata_port *ap)
770 {
771 struct device *dev = ap->host->dev;
772 struct sata_fsl_port_priv *pp = ap->private_data;
773 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
774 void __iomem *hcr_base = host_priv->hcr_base;
775 u32 temp;
776
777 /*
778 * Force host controller to go off-line, aborting current operations
779 */
780 temp = ioread32(hcr_base + HCONTROL);
781 temp &= ~HCONTROL_ONLINE_PHY_RST;
782 temp |= HCONTROL_FORCE_OFFLINE;
783 iowrite32(temp, hcr_base + HCONTROL);
784
785 /* Poll for controller to go offline - should happen immediately */
786 ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
787
788 ap->private_data = NULL;
789 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
790 pp->cmdslot, pp->cmdslot_paddr);
791
792 kfree(pp);
793 }
794
sata_fsl_dev_classify(struct ata_port * ap)795 static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
796 {
797 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
798 void __iomem *hcr_base = host_priv->hcr_base;
799 struct ata_taskfile tf;
800 u32 temp;
801
802 temp = ioread32(hcr_base + SIGNATURE);
803
804 VPRINTK("raw sig = 0x%x\n", temp);
805 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
806 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
807
808 tf.lbah = (temp >> 24) & 0xff;
809 tf.lbam = (temp >> 16) & 0xff;
810 tf.lbal = (temp >> 8) & 0xff;
811 tf.nsect = temp & 0xff;
812
813 return ata_dev_classify(&tf);
814 }
815
sata_fsl_hardreset(struct ata_link * link,unsigned int * class,unsigned long deadline)816 static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
817 unsigned long deadline)
818 {
819 struct ata_port *ap = link->ap;
820 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
821 void __iomem *hcr_base = host_priv->hcr_base;
822 u32 temp;
823 int i = 0;
824 unsigned long start_jiffies;
825
826 DPRINTK("in xx_hardreset\n");
827
828 try_offline_again:
829 /*
830 * Force host controller to go off-line, aborting current operations
831 */
832 temp = ioread32(hcr_base + HCONTROL);
833 temp &= ~HCONTROL_ONLINE_PHY_RST;
834 iowrite32(temp, hcr_base + HCONTROL);
835
836 /* Poll for controller to go offline */
837 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE,
838 1, 500);
839
840 if (temp & ONLINE) {
841 ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i);
842
843 /*
844 * Try to offline controller atleast twice
845 */
846 i++;
847 if (i == 2)
848 goto err;
849 else
850 goto try_offline_again;
851 }
852
853 DPRINTK("hardreset, controller off-lined\n");
854 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
855 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
856
857 /*
858 * PHY reset should remain asserted for atleast 1ms
859 */
860 ata_msleep(ap, 1);
861
862 sata_set_spd(link);
863
864 /*
865 * Now, bring the host controller online again, this can take time
866 * as PHY reset and communication establishment, 1st D2H FIS and
867 * device signature update is done, on safe side assume 500ms
868 * NOTE : Host online status may be indicated immediately!!
869 */
870
871 temp = ioread32(hcr_base + HCONTROL);
872 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
873 temp |= HCONTROL_PMP_ATTACHED;
874 iowrite32(temp, hcr_base + HCONTROL);
875
876 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500);
877
878 if (!(temp & ONLINE)) {
879 ata_port_err(ap, "Hardreset failed, not on-lined\n");
880 goto err;
881 }
882
883 DPRINTK("hardreset, controller off-lined & on-lined\n");
884 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
885 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
886
887 /*
888 * First, wait for the PHYRDY change to occur before waiting for
889 * the signature, and also verify if SStatus indicates device
890 * presence
891 */
892
893 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500);
894 if ((!(temp & 0x10)) || ata_link_offline(link)) {
895 ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n",
896 ioread32(hcr_base + HSTATUS));
897 *class = ATA_DEV_NONE;
898 return 0;
899 }
900
901 /*
902 * Wait for the first D2H from device,i.e,signature update notification
903 */
904 start_jiffies = jiffies;
905 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10,
906 500, jiffies_to_msecs(deadline - start_jiffies));
907
908 if ((temp & 0xFF) != 0x18) {
909 ata_port_warn(ap, "No Signature Update\n");
910 *class = ATA_DEV_NONE;
911 goto do_followup_srst;
912 } else {
913 ata_port_info(ap, "Signature Update detected @ %d msecs\n",
914 jiffies_to_msecs(jiffies - start_jiffies));
915 *class = sata_fsl_dev_classify(ap);
916 return 0;
917 }
918
919 do_followup_srst:
920 /*
921 * request libATA to perform follow-up softreset
922 */
923 return -EAGAIN;
924
925 err:
926 return -EIO;
927 }
928
sata_fsl_softreset(struct ata_link * link,unsigned int * class,unsigned long deadline)929 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
930 unsigned long deadline)
931 {
932 struct ata_port *ap = link->ap;
933 struct sata_fsl_port_priv *pp = ap->private_data;
934 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
935 void __iomem *hcr_base = host_priv->hcr_base;
936 int pmp = sata_srst_pmp(link);
937 u32 temp;
938 struct ata_taskfile tf;
939 u8 *cfis;
940 u32 Serror;
941
942 DPRINTK("in xx_softreset\n");
943
944 if (ata_link_offline(link)) {
945 DPRINTK("PHY reports no device\n");
946 *class = ATA_DEV_NONE;
947 return 0;
948 }
949
950 /*
951 * Send a device reset (SRST) explicitly on command slot #0
952 * Check : will the command queue (reg) be cleared during offlining ??
953 * Also we will be online only if Phy commn. has been established
954 * and device presence has been detected, therefore if we have
955 * reached here, we can send a command to the target device
956 */
957
958 DPRINTK("Sending SRST/device reset\n");
959
960 ata_tf_init(link->device, &tf);
961 cfis = (u8 *) &pp->cmdentry->cfis;
962
963 /* device reset/SRST is a control register update FIS, uses tag0 */
964 sata_fsl_setup_cmd_hdr_entry(pp, 0,
965 SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
966
967 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
968 ata_tf_to_fis(&tf, pmp, 0, cfis);
969
970 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
971 cfis[0], cfis[1], cfis[2], cfis[3]);
972
973 /*
974 * Queue SRST command to the controller/device, ensure that no
975 * other commands are active on the controller/device
976 */
977
978 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
979 ioread32(CQ + hcr_base),
980 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
981
982 iowrite32(0xFFFF, CC + hcr_base);
983 if (pmp != SATA_PMP_CTRL_PORT)
984 iowrite32(pmp, CQPMP + hcr_base);
985 iowrite32(1, CQ + hcr_base);
986
987 temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000);
988 if (temp & 0x1) {
989 ata_port_warn(ap, "ATA_SRST issue failed\n");
990
991 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
992 ioread32(CQ + hcr_base),
993 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
994
995 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
996
997 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
998 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
999 DPRINTK("Serror = 0x%x\n", Serror);
1000 goto err;
1001 }
1002
1003 ata_msleep(ap, 1);
1004
1005 /*
1006 * SATA device enters reset state after receiving a Control register
1007 * FIS with SRST bit asserted and it awaits another H2D Control reg.
1008 * FIS with SRST bit cleared, then the device does internal diags &
1009 * initialization, followed by indicating it's initialization status
1010 * using ATA signature D2H register FIS to the host controller.
1011 */
1012
1013 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE,
1014 0, 0, 5);
1015
1016 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
1017 ata_tf_to_fis(&tf, pmp, 0, cfis);
1018
1019 if (pmp != SATA_PMP_CTRL_PORT)
1020 iowrite32(pmp, CQPMP + hcr_base);
1021 iowrite32(1, CQ + hcr_base);
1022 ata_msleep(ap, 150); /* ?? */
1023
1024 /*
1025 * The above command would have signalled an interrupt on command
1026 * complete, which needs special handling, by clearing the Nth
1027 * command bit of the CCreg
1028 */
1029 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
1030
1031 DPRINTK("SATA FSL : Now checking device signature\n");
1032
1033 *class = ATA_DEV_NONE;
1034
1035 /* Verify if SStatus indicates device presence */
1036 if (ata_link_online(link)) {
1037 /*
1038 * if we are here, device presence has been detected,
1039 * 1st D2H FIS would have been received, but sfis in
1040 * command desc. is not updated, but signature register
1041 * would have been updated
1042 */
1043
1044 *class = sata_fsl_dev_classify(ap);
1045
1046 DPRINTK("class = %d\n", *class);
1047 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
1048 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
1049 }
1050
1051 return 0;
1052
1053 err:
1054 return -EIO;
1055 }
1056
sata_fsl_error_handler(struct ata_port * ap)1057 static void sata_fsl_error_handler(struct ata_port *ap)
1058 {
1059
1060 DPRINTK("in xx_error_handler\n");
1061 sata_pmp_error_handler(ap);
1062
1063 }
1064
sata_fsl_post_internal_cmd(struct ata_queued_cmd * qc)1065 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
1066 {
1067 if (qc->flags & ATA_QCFLAG_FAILED)
1068 qc->err_mask |= AC_ERR_OTHER;
1069
1070 if (qc->err_mask) {
1071 /* make DMA engine forget about the failed command */
1072
1073 }
1074 }
1075
sata_fsl_error_intr(struct ata_port * ap)1076 static void sata_fsl_error_intr(struct ata_port *ap)
1077 {
1078 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1079 void __iomem *hcr_base = host_priv->hcr_base;
1080 u32 hstatus, dereg=0, cereg = 0, SError = 0;
1081 unsigned int err_mask = 0, action = 0;
1082 int freeze = 0, abort=0;
1083 struct ata_link *link = NULL;
1084 struct ata_queued_cmd *qc = NULL;
1085 struct ata_eh_info *ehi;
1086
1087 hstatus = ioread32(hcr_base + HSTATUS);
1088 cereg = ioread32(hcr_base + CE);
1089
1090 /* first, analyze and record host port events */
1091 link = &ap->link;
1092 ehi = &link->eh_info;
1093 ata_ehi_clear_desc(ehi);
1094
1095 /*
1096 * Handle & Clear SError
1097 */
1098
1099 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1100 if (unlikely(SError & 0xFFFF0000))
1101 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
1102
1103 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
1104 hstatus, cereg, ioread32(hcr_base + DE), SError);
1105
1106 /* handle fatal errors */
1107 if (hstatus & FATAL_ERROR_DECODE) {
1108 ehi->err_mask |= AC_ERR_ATA_BUS;
1109 ehi->action |= ATA_EH_SOFTRESET;
1110
1111 freeze = 1;
1112 }
1113
1114 /* Handle SDB FIS receive & notify update */
1115 if (hstatus & INT_ON_SNOTIFY_UPDATE)
1116 sata_async_notification(ap);
1117
1118 /* Handle PHYRDY change notification */
1119 if (hstatus & INT_ON_PHYRDY_CHG) {
1120 DPRINTK("SATA FSL: PHYRDY change indication\n");
1121
1122 /* Setup a soft-reset EH action */
1123 ata_ehi_hotplugged(ehi);
1124 ata_ehi_push_desc(ehi, "%s", "PHY RDY changed");
1125 freeze = 1;
1126 }
1127
1128 /* handle single device errors */
1129 if (cereg) {
1130 /*
1131 * clear the command error, also clears queue to the device
1132 * in error, and we can (re)issue commands to this device.
1133 * When a device is in error all commands queued into the
1134 * host controller and at the device are considered aborted
1135 * and the queue for that device is stopped. Now, after
1136 * clearing the device error, we can issue commands to the
1137 * device to interrogate it to find the source of the error.
1138 */
1139 abort = 1;
1140
1141 DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
1142 ioread32(hcr_base + CE), ioread32(hcr_base + DE));
1143
1144 /* find out the offending link and qc */
1145 if (ap->nr_pmp_links) {
1146 unsigned int dev_num;
1147
1148 dereg = ioread32(hcr_base + DE);
1149 iowrite32(dereg, hcr_base + DE);
1150 iowrite32(cereg, hcr_base + CE);
1151
1152 dev_num = ffs(dereg) - 1;
1153 if (dev_num < ap->nr_pmp_links && dereg != 0) {
1154 link = &ap->pmp_link[dev_num];
1155 ehi = &link->eh_info;
1156 qc = ata_qc_from_tag(ap, link->active_tag);
1157 /*
1158 * We should consider this as non fatal error,
1159 * and TF must be updated as done below.
1160 */
1161
1162 err_mask |= AC_ERR_DEV;
1163
1164 } else {
1165 err_mask |= AC_ERR_HSM;
1166 action |= ATA_EH_HARDRESET;
1167 freeze = 1;
1168 }
1169 } else {
1170 dereg = ioread32(hcr_base + DE);
1171 iowrite32(dereg, hcr_base + DE);
1172 iowrite32(cereg, hcr_base + CE);
1173
1174 qc = ata_qc_from_tag(ap, link->active_tag);
1175 /*
1176 * We should consider this as non fatal error,
1177 * and TF must be updated as done below.
1178 */
1179 err_mask |= AC_ERR_DEV;
1180 }
1181 }
1182
1183 /* record error info */
1184 if (qc)
1185 qc->err_mask |= err_mask;
1186 else
1187 ehi->err_mask |= err_mask;
1188
1189 ehi->action |= action;
1190
1191 /* freeze or abort */
1192 if (freeze)
1193 ata_port_freeze(ap);
1194 else if (abort) {
1195 if (qc)
1196 ata_link_abort(qc->dev->link);
1197 else
1198 ata_port_abort(ap);
1199 }
1200 }
1201
sata_fsl_host_intr(struct ata_port * ap)1202 static void sata_fsl_host_intr(struct ata_port *ap)
1203 {
1204 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1205 void __iomem *hcr_base = host_priv->hcr_base;
1206 u32 hstatus, done_mask = 0;
1207 struct ata_queued_cmd *qc;
1208 u32 SError;
1209 u32 tag;
1210 u32 status_mask = INT_ON_ERROR;
1211
1212 hstatus = ioread32(hcr_base + HSTATUS);
1213
1214 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1215
1216 /* Read command completed register */
1217 done_mask = ioread32(hcr_base + CC);
1218
1219 /* Workaround for data length mismatch errata */
1220 if (unlikely(hstatus & INT_ON_DATA_LENGTH_MISMATCH)) {
1221 ata_qc_for_each_with_internal(ap, qc, tag) {
1222 if (qc && ata_is_atapi(qc->tf.protocol)) {
1223 u32 hcontrol;
1224 /* Set HControl[27] to clear error registers */
1225 hcontrol = ioread32(hcr_base + HCONTROL);
1226 iowrite32(hcontrol | CLEAR_ERROR,
1227 hcr_base + HCONTROL);
1228
1229 /* Clear HControl[27] */
1230 iowrite32(hcontrol & ~CLEAR_ERROR,
1231 hcr_base + HCONTROL);
1232
1233 /* Clear SError[E] bit */
1234 sata_fsl_scr_write(&ap->link, SCR_ERROR,
1235 SError);
1236
1237 /* Ignore fatal error and device error */
1238 status_mask &= ~(INT_ON_SINGL_DEVICE_ERR
1239 | INT_ON_FATAL_ERR);
1240 break;
1241 }
1242 }
1243 }
1244
1245 if (unlikely(SError & 0xFFFF0000)) {
1246 DPRINTK("serror @host_intr : 0x%x\n", SError);
1247 sata_fsl_error_intr(ap);
1248 }
1249
1250 if (unlikely(hstatus & status_mask)) {
1251 DPRINTK("error interrupt!!\n");
1252 sata_fsl_error_intr(ap);
1253 return;
1254 }
1255
1256 VPRINTK("Status of all queues :\n");
1257 VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%llx\n",
1258 done_mask,
1259 ioread32(hcr_base + CA),
1260 ioread32(hcr_base + CE),
1261 ioread32(hcr_base + CQ),
1262 ap->qc_active);
1263
1264 if (done_mask & ap->qc_active) {
1265 int i;
1266 /* clear CC bit, this will also complete the interrupt */
1267 iowrite32(done_mask, hcr_base + CC);
1268
1269 DPRINTK("Status of all queues :\n");
1270 DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
1271 done_mask, ioread32(hcr_base + CA),
1272 ioread32(hcr_base + CE));
1273
1274 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
1275 if (done_mask & (1 << i))
1276 DPRINTK
1277 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
1278 i, ioread32(hcr_base + CC),
1279 ioread32(hcr_base + CA));
1280 }
1281 ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask);
1282 return;
1283
1284 } else if ((ap->qc_active & (1ULL << ATA_TAG_INTERNAL))) {
1285 iowrite32(1, hcr_base + CC);
1286 qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1287
1288 DPRINTK("completing non-ncq cmd, CC=0x%x\n",
1289 ioread32(hcr_base + CC));
1290
1291 if (qc) {
1292 ata_qc_complete(qc);
1293 }
1294 } else {
1295 /* Spurious Interrupt!! */
1296 DPRINTK("spurious interrupt!!, CC = 0x%x\n",
1297 ioread32(hcr_base + CC));
1298 iowrite32(done_mask, hcr_base + CC);
1299 return;
1300 }
1301 }
1302
sata_fsl_interrupt(int irq,void * dev_instance)1303 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
1304 {
1305 struct ata_host *host = dev_instance;
1306 struct sata_fsl_host_priv *host_priv = host->private_data;
1307 void __iomem *hcr_base = host_priv->hcr_base;
1308 u32 interrupt_enables;
1309 unsigned handled = 0;
1310 struct ata_port *ap;
1311
1312 /* ack. any pending IRQs for this controller/port */
1313 interrupt_enables = ioread32(hcr_base + HSTATUS);
1314 interrupt_enables &= 0x3F;
1315
1316 DPRINTK("interrupt status 0x%x\n", interrupt_enables);
1317
1318 if (!interrupt_enables)
1319 return IRQ_NONE;
1320
1321 spin_lock(&host->lock);
1322
1323 /* Assuming one port per host controller */
1324
1325 ap = host->ports[0];
1326 if (ap) {
1327 sata_fsl_host_intr(ap);
1328 } else {
1329 dev_warn(host->dev, "interrupt on disabled port 0\n");
1330 }
1331
1332 iowrite32(interrupt_enables, hcr_base + HSTATUS);
1333 handled = 1;
1334
1335 spin_unlock(&host->lock);
1336
1337 return IRQ_RETVAL(handled);
1338 }
1339
1340 /*
1341 * Multiple ports are represented by multiple SATA controllers with
1342 * one port per controller
1343 */
sata_fsl_init_controller(struct ata_host * host)1344 static int sata_fsl_init_controller(struct ata_host *host)
1345 {
1346 struct sata_fsl_host_priv *host_priv = host->private_data;
1347 void __iomem *hcr_base = host_priv->hcr_base;
1348 u32 temp;
1349
1350 /*
1351 * NOTE : We cannot bring the controller online before setting
1352 * the CHBA, hence main controller initialization is done as
1353 * part of the port_start() callback
1354 */
1355
1356 /* sata controller to operate in enterprise mode */
1357 temp = ioread32(hcr_base + HCONTROL);
1358 iowrite32(temp & ~HCONTROL_LEGACY, hcr_base + HCONTROL);
1359
1360 /* ack. any pending IRQs for this controller/port */
1361 temp = ioread32(hcr_base + HSTATUS);
1362 if (temp & 0x3F)
1363 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
1364
1365 /* Keep interrupts disabled on the controller */
1366 temp = ioread32(hcr_base + HCONTROL);
1367 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
1368
1369 /* Disable interrupt coalescing control(icc), for the moment */
1370 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
1371 iowrite32(0x01000000, hcr_base + ICC);
1372
1373 /* clear error registers, SError is cleared by libATA */
1374 iowrite32(0x00000FFFF, hcr_base + CE);
1375 iowrite32(0x00000FFFF, hcr_base + DE);
1376
1377 /*
1378 * reset the number of command complete bits which will cause the
1379 * interrupt to be signaled
1380 */
1381 fsl_sata_set_irq_coalescing(host, intr_coalescing_count,
1382 intr_coalescing_ticks);
1383
1384 /*
1385 * host controller will be brought on-line, during xx_port_start()
1386 * callback, that should also initiate the OOB, COMINIT sequence
1387 */
1388
1389 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1390 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1391
1392 return 0;
1393 }
1394
1395 /*
1396 * scsi mid-layer and libata interface structures
1397 */
1398 static struct scsi_host_template sata_fsl_sht = {
1399 ATA_NCQ_SHT("sata_fsl"),
1400 .can_queue = SATA_FSL_QUEUE_DEPTH,
1401 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
1402 .dma_boundary = ATA_DMA_BOUNDARY,
1403 };
1404
1405 static struct ata_port_operations sata_fsl_ops = {
1406 .inherits = &sata_pmp_port_ops,
1407
1408 .qc_defer = ata_std_qc_defer,
1409 .qc_prep = sata_fsl_qc_prep,
1410 .qc_issue = sata_fsl_qc_issue,
1411 .qc_fill_rtf = sata_fsl_qc_fill_rtf,
1412
1413 .scr_read = sata_fsl_scr_read,
1414 .scr_write = sata_fsl_scr_write,
1415
1416 .freeze = sata_fsl_freeze,
1417 .thaw = sata_fsl_thaw,
1418 .softreset = sata_fsl_softreset,
1419 .hardreset = sata_fsl_hardreset,
1420 .pmp_softreset = sata_fsl_softreset,
1421 .error_handler = sata_fsl_error_handler,
1422 .post_internal_cmd = sata_fsl_post_internal_cmd,
1423
1424 .port_start = sata_fsl_port_start,
1425 .port_stop = sata_fsl_port_stop,
1426
1427 .pmp_attach = sata_fsl_pmp_attach,
1428 .pmp_detach = sata_fsl_pmp_detach,
1429 };
1430
1431 static const struct ata_port_info sata_fsl_port_info[] = {
1432 {
1433 .flags = SATA_FSL_HOST_FLAGS,
1434 .pio_mask = ATA_PIO4,
1435 .udma_mask = ATA_UDMA6,
1436 .port_ops = &sata_fsl_ops,
1437 },
1438 };
1439
sata_fsl_probe(struct platform_device * ofdev)1440 static int sata_fsl_probe(struct platform_device *ofdev)
1441 {
1442 int retval = -ENXIO;
1443 void __iomem *hcr_base = NULL;
1444 void __iomem *ssr_base = NULL;
1445 void __iomem *csr_base = NULL;
1446 struct sata_fsl_host_priv *host_priv = NULL;
1447 int irq;
1448 struct ata_host *host = NULL;
1449 u32 temp;
1450
1451 struct ata_port_info pi = sata_fsl_port_info[0];
1452 const struct ata_port_info *ppi[] = { &pi, NULL };
1453
1454 dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n");
1455
1456 hcr_base = of_iomap(ofdev->dev.of_node, 0);
1457 if (!hcr_base)
1458 goto error_exit_with_cleanup;
1459
1460 ssr_base = hcr_base + 0x100;
1461 csr_base = hcr_base + 0x140;
1462
1463 if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) {
1464 temp = ioread32(csr_base + TRANSCFG);
1465 temp = temp & 0xffffffe0;
1466 iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG);
1467 }
1468
1469 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
1470 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
1471 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
1472
1473 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
1474 if (!host_priv)
1475 goto error_exit_with_cleanup;
1476
1477 host_priv->hcr_base = hcr_base;
1478 host_priv->ssr_base = ssr_base;
1479 host_priv->csr_base = csr_base;
1480
1481 irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
1482 if (!irq) {
1483 dev_err(&ofdev->dev, "invalid irq from platform\n");
1484 goto error_exit_with_cleanup;
1485 }
1486 host_priv->irq = irq;
1487
1488 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2"))
1489 host_priv->data_snoop = DATA_SNOOP_ENABLE_V2;
1490 else
1491 host_priv->data_snoop = DATA_SNOOP_ENABLE_V1;
1492
1493 /* allocate host structure */
1494 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
1495 if (!host) {
1496 retval = -ENOMEM;
1497 goto error_exit_with_cleanup;
1498 }
1499
1500 /* host->iomap is not used currently */
1501 host->private_data = host_priv;
1502
1503 /* initialize host controller */
1504 sata_fsl_init_controller(host);
1505
1506 /*
1507 * Now, register with libATA core, this will also initiate the
1508 * device discovery process, invoking our port_start() handler &
1509 * error_handler() to execute a dummy Softreset EH session
1510 */
1511 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
1512 &sata_fsl_sht);
1513
1514 host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show;
1515 host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store;
1516 sysfs_attr_init(&host_priv->intr_coalescing.attr);
1517 host_priv->intr_coalescing.attr.name = "intr_coalescing";
1518 host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR;
1519 retval = device_create_file(host->dev, &host_priv->intr_coalescing);
1520 if (retval)
1521 goto error_exit_with_cleanup;
1522
1523 host_priv->rx_watermark.show = fsl_sata_rx_watermark_show;
1524 host_priv->rx_watermark.store = fsl_sata_rx_watermark_store;
1525 sysfs_attr_init(&host_priv->rx_watermark.attr);
1526 host_priv->rx_watermark.attr.name = "rx_watermark";
1527 host_priv->rx_watermark.attr.mode = S_IRUGO | S_IWUSR;
1528 retval = device_create_file(host->dev, &host_priv->rx_watermark);
1529 if (retval) {
1530 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
1531 goto error_exit_with_cleanup;
1532 }
1533
1534 return 0;
1535
1536 error_exit_with_cleanup:
1537
1538 if (host)
1539 ata_host_detach(host);
1540
1541 if (hcr_base)
1542 iounmap(hcr_base);
1543 kfree(host_priv);
1544
1545 return retval;
1546 }
1547
sata_fsl_remove(struct platform_device * ofdev)1548 static int sata_fsl_remove(struct platform_device *ofdev)
1549 {
1550 struct ata_host *host = platform_get_drvdata(ofdev);
1551 struct sata_fsl_host_priv *host_priv = host->private_data;
1552
1553 device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
1554 device_remove_file(&ofdev->dev, &host_priv->rx_watermark);
1555
1556 ata_host_detach(host);
1557
1558 irq_dispose_mapping(host_priv->irq);
1559 iounmap(host_priv->hcr_base);
1560 kfree(host_priv);
1561
1562 return 0;
1563 }
1564
1565 #ifdef CONFIG_PM_SLEEP
sata_fsl_suspend(struct platform_device * op,pm_message_t state)1566 static int sata_fsl_suspend(struct platform_device *op, pm_message_t state)
1567 {
1568 struct ata_host *host = platform_get_drvdata(op);
1569 return ata_host_suspend(host, state);
1570 }
1571
sata_fsl_resume(struct platform_device * op)1572 static int sata_fsl_resume(struct platform_device *op)
1573 {
1574 struct ata_host *host = platform_get_drvdata(op);
1575 struct sata_fsl_host_priv *host_priv = host->private_data;
1576 int ret;
1577 void __iomem *hcr_base = host_priv->hcr_base;
1578 struct ata_port *ap = host->ports[0];
1579 struct sata_fsl_port_priv *pp = ap->private_data;
1580
1581 ret = sata_fsl_init_controller(host);
1582 if (ret) {
1583 dev_err(&op->dev, "Error initializing hardware\n");
1584 return ret;
1585 }
1586
1587 /* Recovery the CHBA register in host controller cmd register set */
1588 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
1589
1590 iowrite32((ioread32(hcr_base + HCONTROL)
1591 | HCONTROL_ONLINE_PHY_RST
1592 | HCONTROL_SNOOP_ENABLE
1593 | HCONTROL_PMP_ATTACHED),
1594 hcr_base + HCONTROL);
1595
1596 ata_host_resume(host);
1597 return 0;
1598 }
1599 #endif
1600
1601 static const struct of_device_id fsl_sata_match[] = {
1602 {
1603 .compatible = "fsl,pq-sata",
1604 },
1605 {
1606 .compatible = "fsl,pq-sata-v2",
1607 },
1608 {},
1609 };
1610
1611 MODULE_DEVICE_TABLE(of, fsl_sata_match);
1612
1613 static struct platform_driver fsl_sata_driver = {
1614 .driver = {
1615 .name = "fsl-sata",
1616 .of_match_table = fsl_sata_match,
1617 },
1618 .probe = sata_fsl_probe,
1619 .remove = sata_fsl_remove,
1620 #ifdef CONFIG_PM_SLEEP
1621 .suspend = sata_fsl_suspend,
1622 .resume = sata_fsl_resume,
1623 #endif
1624 };
1625
1626 module_platform_driver(fsl_sata_driver);
1627
1628 MODULE_LICENSE("GPL");
1629 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
1630 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
1631 MODULE_VERSION("1.10");
1632