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drivers/staging/usbip/userspace/libsrc/vhci_driver.c: test the just-initialized value
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ata / sata_fsl.c
blob78ae7b67b09e7bdf79823fece7aa9fef0d01b720
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 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 /* Controller information */
30 enum {
31 SATA_FSL_QUEUE_DEPTH = 16,
32 SATA_FSL_MAX_PRD = 63,
33 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
34 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
35
36 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
37 ATA_FLAG_PMP | ATA_FLAG_NCQ | ATA_FLAG_AN),
38
39 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
40 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
41 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
42
43 /*
44 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
45 * chained indirect PRDEs up to a max count of 63.
46 * We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will
47 * be setup as an indirect descriptor, pointing to it's next
48 * (contiguous) PRDE. Though chained indirect PRDE arrays are
49 * supported,it will be more efficient to use a direct PRDT and
50 * a single chain/link to indirect PRDE array/PRDT.
51 */
52
53 SATA_FSL_CMD_DESC_CFIS_SZ = 32,
54 SATA_FSL_CMD_DESC_SFIS_SZ = 32,
55 SATA_FSL_CMD_DESC_ACMD_SZ = 16,
56 SATA_FSL_CMD_DESC_RSRVD = 16,
57
58 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
59 SATA_FSL_CMD_DESC_SFIS_SZ +
60 SATA_FSL_CMD_DESC_ACMD_SZ +
61 SATA_FSL_CMD_DESC_RSRVD +
62 SATA_FSL_MAX_PRD * 16),
63
64 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
65 (SATA_FSL_CMD_DESC_CFIS_SZ +
66 SATA_FSL_CMD_DESC_SFIS_SZ +
67 SATA_FSL_CMD_DESC_ACMD_SZ +
68 SATA_FSL_CMD_DESC_RSRVD),
69
70 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
71 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
72 SATA_FSL_CMD_DESC_AR_SZ),
73
74 /*
75 * MPC8315 has two SATA controllers, SATA1 & SATA2
76 * (one port per controller)
77 * MPC837x has 2/4 controllers, one port per controller
78 */
79
80 SATA_FSL_MAX_PORTS = 1,
81
82 SATA_FSL_IRQ_FLAG = IRQF_SHARED,
83 };
84
85 /*
86 * Host Controller command register set - per port
87 */
88 enum {
89 CQ = 0,
90 CA = 8,
91 CC = 0x10,
92 CE = 0x18,
93 DE = 0x20,
94 CHBA = 0x24,
95 HSTATUS = 0x28,
96 HCONTROL = 0x2C,
97 CQPMP = 0x30,
98 SIGNATURE = 0x34,
99 ICC = 0x38,
100
101 /*
102 * Host Status Register (HStatus) bitdefs
103 */
104 ONLINE = (1 << 31),
105 GOING_OFFLINE = (1 << 30),
106 BIST_ERR = (1 << 29),
107
108 FATAL_ERR_HC_MASTER_ERR = (1 << 18),
109 FATAL_ERR_PARITY_ERR_TX = (1 << 17),
110 FATAL_ERR_PARITY_ERR_RX = (1 << 16),
111 FATAL_ERR_DATA_UNDERRUN = (1 << 13),
112 FATAL_ERR_DATA_OVERRUN = (1 << 12),
113 FATAL_ERR_CRC_ERR_TX = (1 << 11),
114 FATAL_ERR_CRC_ERR_RX = (1 << 10),
115 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
116 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
117
118 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
119 FATAL_ERR_PARITY_ERR_TX |
120 FATAL_ERR_PARITY_ERR_RX |
121 FATAL_ERR_DATA_UNDERRUN |
122 FATAL_ERR_DATA_OVERRUN |
123 FATAL_ERR_CRC_ERR_TX |
124 FATAL_ERR_CRC_ERR_RX |
125 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
126
127 INT_ON_FATAL_ERR = (1 << 5),
128 INT_ON_PHYRDY_CHG = (1 << 4),
129
130 INT_ON_SIGNATURE_UPDATE = (1 << 3),
131 INT_ON_SNOTIFY_UPDATE = (1 << 2),
132 INT_ON_SINGL_DEVICE_ERR = (1 << 1),
133 INT_ON_CMD_COMPLETE = 1,
134
135 INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE |
136 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
137
138 /*
139 * Host Control Register (HControl) bitdefs
140 */
141 HCONTROL_ONLINE_PHY_RST = (1 << 31),
142 HCONTROL_FORCE_OFFLINE = (1 << 30),
143 HCONTROL_PARITY_PROT_MOD = (1 << 14),
144 HCONTROL_DPATH_PARITY = (1 << 12),
145 HCONTROL_SNOOP_ENABLE = (1 << 10),
146 HCONTROL_PMP_ATTACHED = (1 << 9),
147 HCONTROL_COPYOUT_STATFIS = (1 << 8),
148 IE_ON_FATAL_ERR = (1 << 5),
149 IE_ON_PHYRDY_CHG = (1 << 4),
150 IE_ON_SIGNATURE_UPDATE = (1 << 3),
151 IE_ON_SNOTIFY_UPDATE = (1 << 2),
152 IE_ON_SINGL_DEVICE_ERR = (1 << 1),
153 IE_ON_CMD_COMPLETE = 1,
154
155 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
156 IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE |
157 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
158
159 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
160 DATA_SNOOP_ENABLE_V1 = (1 << 22),
161 DATA_SNOOP_ENABLE_V2 = (1 << 28),
162 };
163
164 /*
165 * SATA Superset Registers
166 */
167 enum {
168 SSTATUS = 0,
169 SERROR = 4,
170 SCONTROL = 8,
171 SNOTIFY = 0xC,
172 };
173
174 /*
175 * Control Status Register Set
176 */
177 enum {
178 TRANSCFG = 0,
179 TRANSSTATUS = 4,
180 LINKCFG = 8,
181 LINKCFG1 = 0xC,
182 LINKCFG2 = 0x10,
183 LINKSTATUS = 0x14,
184 LINKSTATUS1 = 0x18,
185 PHYCTRLCFG = 0x1C,
186 COMMANDSTAT = 0x20,
187 };
188
189 /* TRANSCFG (transport-layer) configuration control */
190 enum {
191 TRANSCFG_RX_WATER_MARK = (1 << 4),
192 };
193
194 /* PHY (link-layer) configuration control */
195 enum {
196 PHY_BIST_ENABLE = 0x01,
197 };
198
199 /*
200 * Command Header Table entry, i.e, command slot
201 * 4 Dwords per command slot, command header size == 64 Dwords.
202 */
203 struct cmdhdr_tbl_entry {
204 u32 cda;
205 u32 prde_fis_len;
206 u32 ttl;
207 u32 desc_info;
208 };
209
210 /*
211 * Description information bitdefs
212 */
213 enum {
214 CMD_DESC_RES = (1 << 11),
215 VENDOR_SPECIFIC_BIST = (1 << 10),
216 CMD_DESC_SNOOP_ENABLE = (1 << 9),
217 FPDMA_QUEUED_CMD = (1 << 8),
218 SRST_CMD = (1 << 7),
219 BIST = (1 << 6),
220 ATAPI_CMD = (1 << 5),
221 };
222
223 /*
224 * Command Descriptor
225 */
226 struct command_desc {
227 u8 cfis[8 * 4];
228 u8 sfis[8 * 4];
229 u8 acmd[4 * 4];
230 u8 fill[4 * 4];
231 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
232 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
233 };
234
235 /*
236 * Physical region table descriptor(PRD)
237 */
238
239 struct prde {
240 u32 dba;
241 u8 fill[2 * 4];
242 u32 ddc_and_ext;
243 };
244
245 /*
246 * ata_port private data
247 * This is our per-port instance data.
248 */
249 struct sata_fsl_port_priv {
250 struct cmdhdr_tbl_entry *cmdslot;
251 dma_addr_t cmdslot_paddr;
252 struct command_desc *cmdentry;
253 dma_addr_t cmdentry_paddr;
254 };
255
256 /*
257 * ata_port->host_set private data
258 */
259 struct sata_fsl_host_priv {
260 void __iomem *hcr_base;
261 void __iomem *ssr_base;
262 void __iomem *csr_base;
263 int irq;
264 int data_snoop;
265 };
266
267 static inline unsigned int sata_fsl_tag(unsigned int tag,
268 void __iomem *hcr_base)
269 {
270 /* We let libATA core do actual (queue) tag allocation */
271
272 /* all non NCQ/queued commands should have tag#0 */
273 if (ata_tag_internal(tag)) {
274 DPRINTK("mapping internal cmds to tag#0\n");
275 return 0;
276 }
277
278 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
279 DPRINTK("tag %d invalid : out of range\n", tag);
280 return 0;
281 }
282
283 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
284 DPRINTK("tag %d invalid : in use!!\n", tag);
285 return 0;
286 }
287
288 return tag;
289 }
290
291 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
292 unsigned int tag, u32 desc_info,
293 u32 data_xfer_len, u8 num_prde,
294 u8 fis_len)
295 {
296 dma_addr_t cmd_descriptor_address;
297
298 cmd_descriptor_address = pp->cmdentry_paddr +
299 tag * SATA_FSL_CMD_DESC_SIZE;
300
301 /* NOTE: both data_xfer_len & fis_len are Dword counts */
302
303 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
304 pp->cmdslot[tag].prde_fis_len =
305 cpu_to_le32((num_prde << 16) | (fis_len << 2));
306 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
307 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
308
309 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
310 pp->cmdslot[tag].cda,
311 pp->cmdslot[tag].prde_fis_len,
312 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
313
314 }
315
316 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
317 u32 *ttl, dma_addr_t cmd_desc_paddr,
318 int data_snoop)
319 {
320 struct scatterlist *sg;
321 unsigned int num_prde = 0;
322 u32 ttl_dwords = 0;
323
324 /*
325 * NOTE : direct & indirect prdt's are contiguously allocated
326 */
327 struct prde *prd = (struct prde *)&((struct command_desc *)
328 cmd_desc)->prdt;
329
330 struct prde *prd_ptr_to_indirect_ext = NULL;
331 unsigned indirect_ext_segment_sz = 0;
332 dma_addr_t indirect_ext_segment_paddr;
333 unsigned int si;
334
335 VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
336
337 indirect_ext_segment_paddr = cmd_desc_paddr +
338 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
339
340 for_each_sg(qc->sg, sg, qc->n_elem, si) {
341 dma_addr_t sg_addr = sg_dma_address(sg);
342 u32 sg_len = sg_dma_len(sg);
343
344 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n",
345 (unsigned long long)sg_addr, sg_len);
346
347 /* warn if each s/g element is not dword aligned */
348 if (sg_addr & 0x03)
349 ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n",
350 (unsigned long long)sg_addr);
351 if (sg_len & 0x03)
352 ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n",
353 sg_len);
354
355 if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
356 sg_next(sg) != NULL) {
357 VPRINTK("setting indirect prde\n");
358 prd_ptr_to_indirect_ext = prd;
359 prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
360 indirect_ext_segment_sz = 0;
361 ++prd;
362 ++num_prde;
363 }
364
365 ttl_dwords += sg_len;
366 prd->dba = cpu_to_le32(sg_addr);
367 prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03));
368
369 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
370 ttl_dwords, prd->dba, prd->ddc_and_ext);
371
372 ++num_prde;
373 ++prd;
374 if (prd_ptr_to_indirect_ext)
375 indirect_ext_segment_sz += sg_len;
376 }
377
378 if (prd_ptr_to_indirect_ext) {
379 /* set indirect extension flag along with indirect ext. size */
380 prd_ptr_to_indirect_ext->ddc_and_ext =
381 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
382 data_snoop |
383 (indirect_ext_segment_sz & ~0x03)));
384 }
385
386 *ttl = ttl_dwords;
387 return num_prde;
388 }
389
390 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
391 {
392 struct ata_port *ap = qc->ap;
393 struct sata_fsl_port_priv *pp = ap->private_data;
394 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
395 void __iomem *hcr_base = host_priv->hcr_base;
396 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
397 struct command_desc *cd;
398 u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE;
399 u32 num_prde = 0;
400 u32 ttl_dwords = 0;
401 dma_addr_t cd_paddr;
402
403 cd = (struct command_desc *)pp->cmdentry + tag;
404 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
405
406 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis);
407
408 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
409 cd->cfis[0], cd->cfis[1], cd->cfis[2]);
410
411 if (qc->tf.protocol == ATA_PROT_NCQ) {
412 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
413 cd->cfis[3], cd->cfis[11]);
414 }
415
416 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
417 if (ata_is_atapi(qc->tf.protocol)) {
418 desc_info |= ATAPI_CMD;
419 memset((void *)&cd->acmd, 0, 32);
420 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
421 }
422
423 if (qc->flags & ATA_QCFLAG_DMAMAP)
424 num_prde = sata_fsl_fill_sg(qc, (void *)cd,
425 &ttl_dwords, cd_paddr,
426 host_priv->data_snoop);
427
428 if (qc->tf.protocol == ATA_PROT_NCQ)
429 desc_info |= FPDMA_QUEUED_CMD;
430
431 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
432 num_prde, 5);
433
434 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
435 desc_info, ttl_dwords, num_prde);
436 }
437
438 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
439 {
440 struct ata_port *ap = qc->ap;
441 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
442 void __iomem *hcr_base = host_priv->hcr_base;
443 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
444
445 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
446 ioread32(CQ + hcr_base),
447 ioread32(CA + hcr_base),
448 ioread32(CE + hcr_base), ioread32(CC + hcr_base));
449
450 iowrite32(qc->dev->link->pmp, CQPMP + hcr_base);
451
452 /* Simply queue command to the controller/device */
453 iowrite32(1 << tag, CQ + hcr_base);
454
455 VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
456 tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
457
458 VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
459 ioread32(CE + hcr_base),
460 ioread32(DE + hcr_base),
461 ioread32(CC + hcr_base),
462 ioread32(COMMANDSTAT + host_priv->csr_base));
463
464 return 0;
465 }
466
467 static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
468 {
469 struct sata_fsl_port_priv *pp = qc->ap->private_data;
470 struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data;
471 void __iomem *hcr_base = host_priv->hcr_base;
472 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
473 struct command_desc *cd;
474
475 cd = pp->cmdentry + tag;
476
477 ata_tf_from_fis(cd->sfis, &qc->result_tf);
478 return true;
479 }
480
481 static int sata_fsl_scr_write(struct ata_link *link,
482 unsigned int sc_reg_in, u32 val)
483 {
484 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
485 void __iomem *ssr_base = host_priv->ssr_base;
486 unsigned int sc_reg;
487
488 switch (sc_reg_in) {
489 case SCR_STATUS:
490 case SCR_ERROR:
491 case SCR_CONTROL:
492 case SCR_ACTIVE:
493 sc_reg = sc_reg_in;
494 break;
495 default:
496 return -EINVAL;
497 }
498
499 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
500
501 iowrite32(val, ssr_base + (sc_reg * 4));
502 return 0;
503 }
504
505 static int sata_fsl_scr_read(struct ata_link *link,
506 unsigned int sc_reg_in, u32 *val)
507 {
508 struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
509 void __iomem *ssr_base = host_priv->ssr_base;
510 unsigned int sc_reg;
511
512 switch (sc_reg_in) {
513 case SCR_STATUS:
514 case SCR_ERROR:
515 case SCR_CONTROL:
516 case SCR_ACTIVE:
517 sc_reg = sc_reg_in;
518 break;
519 default:
520 return -EINVAL;
521 }
522
523 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
524
525 *val = ioread32(ssr_base + (sc_reg * 4));
526 return 0;
527 }
528
529 static void sata_fsl_freeze(struct ata_port *ap)
530 {
531 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
532 void __iomem *hcr_base = host_priv->hcr_base;
533 u32 temp;
534
535 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
536 ioread32(CQ + hcr_base),
537 ioread32(CA + hcr_base),
538 ioread32(CE + hcr_base), ioread32(DE + hcr_base));
539 VPRINTK("CmdStat = 0x%x\n",
540 ioread32(host_priv->csr_base + COMMANDSTAT));
541
542 /* disable interrupts on the controller/port */
543 temp = ioread32(hcr_base + HCONTROL);
544 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
545
546 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
547 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
548 }
549
550 static void sata_fsl_thaw(struct ata_port *ap)
551 {
552 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
553 void __iomem *hcr_base = host_priv->hcr_base;
554 u32 temp;
555
556 /* ack. any pending IRQs for this controller/port */
557 temp = ioread32(hcr_base + HSTATUS);
558
559 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
560
561 if (temp & 0x3F)
562 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
563
564 /* enable interrupts on the controller/port */
565 temp = ioread32(hcr_base + HCONTROL);
566 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
567
568 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
569 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
570 }
571
572 static void sata_fsl_pmp_attach(struct ata_port *ap)
573 {
574 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
575 void __iomem *hcr_base = host_priv->hcr_base;
576 u32 temp;
577
578 temp = ioread32(hcr_base + HCONTROL);
579 iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL);
580 }
581
582 static void sata_fsl_pmp_detach(struct ata_port *ap)
583 {
584 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
585 void __iomem *hcr_base = host_priv->hcr_base;
586 u32 temp;
587
588 temp = ioread32(hcr_base + HCONTROL);
589 temp &= ~HCONTROL_PMP_ATTACHED;
590 iowrite32(temp, hcr_base + HCONTROL);
591
592 /* enable interrupts on the controller/port */
593 temp = ioread32(hcr_base + HCONTROL);
594 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
595
596 }
597
598 static int sata_fsl_port_start(struct ata_port *ap)
599 {
600 struct device *dev = ap->host->dev;
601 struct sata_fsl_port_priv *pp;
602 void *mem;
603 dma_addr_t mem_dma;
604 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
605 void __iomem *hcr_base = host_priv->hcr_base;
606 u32 temp;
607
608 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
609 if (!pp)
610 return -ENOMEM;
611
612 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
613 GFP_KERNEL);
614 if (!mem) {
615 kfree(pp);
616 return -ENOMEM;
617 }
618 memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
619
620 pp->cmdslot = mem;
621 pp->cmdslot_paddr = mem_dma;
622
623 mem += SATA_FSL_CMD_SLOT_SIZE;
624 mem_dma += SATA_FSL_CMD_SLOT_SIZE;
625
626 pp->cmdentry = mem;
627 pp->cmdentry_paddr = mem_dma;
628
629 ap->private_data = pp;
630
631 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
632 pp->cmdslot_paddr, pp->cmdentry_paddr);
633
634 /* Now, update the CHBA register in host controller cmd register set */
635 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
636
637 /*
638 * Now, we can bring the controller on-line & also initiate
639 * the COMINIT sequence, we simply return here and the boot-probing
640 * & device discovery process is re-initiated by libATA using a
641 * Softreset EH (dummy) session. Hence, boot probing and device
642 * discovey will be part of sata_fsl_softreset() callback.
643 */
644
645 temp = ioread32(hcr_base + HCONTROL);
646 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
647
648 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
649 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
650 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
651
652 #ifdef CONFIG_MPC8315_DS
653 /*
654 * Workaround for 8315DS board 3gbps link-up issue,
655 * currently limit SATA port to GEN1 speed
656 */
657 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
658 temp &= ~(0xF << 4);
659 temp |= (0x1 << 4);
660 sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp);
661
662 sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
663 dev_warn(dev, "scr_control, speed limited to %x\n", temp);
664 #endif
665
666 return 0;
667 }
668
669 static void sata_fsl_port_stop(struct ata_port *ap)
670 {
671 struct device *dev = ap->host->dev;
672 struct sata_fsl_port_priv *pp = ap->private_data;
673 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
674 void __iomem *hcr_base = host_priv->hcr_base;
675 u32 temp;
676
677 /*
678 * Force host controller to go off-line, aborting current operations
679 */
680 temp = ioread32(hcr_base + HCONTROL);
681 temp &= ~HCONTROL_ONLINE_PHY_RST;
682 temp |= HCONTROL_FORCE_OFFLINE;
683 iowrite32(temp, hcr_base + HCONTROL);
684
685 /* Poll for controller to go offline - should happen immediately */
686 ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
687
688 ap->private_data = NULL;
689 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
690 pp->cmdslot, pp->cmdslot_paddr);
691
692 kfree(pp);
693 }
694
695 static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
696 {
697 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
698 void __iomem *hcr_base = host_priv->hcr_base;
699 struct ata_taskfile tf;
700 u32 temp;
701
702 temp = ioread32(hcr_base + SIGNATURE);
703
704 VPRINTK("raw sig = 0x%x\n", temp);
705 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
706 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
707
708 tf.lbah = (temp >> 24) & 0xff;
709 tf.lbam = (temp >> 16) & 0xff;
710 tf.lbal = (temp >> 8) & 0xff;
711 tf.nsect = temp & 0xff;
712
713 return ata_dev_classify(&tf);
714 }
715
716 static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
717 unsigned long deadline)
718 {
719 struct ata_port *ap = link->ap;
720 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
721 void __iomem *hcr_base = host_priv->hcr_base;
722 u32 temp;
723 int i = 0;
724 unsigned long start_jiffies;
725
726 DPRINTK("in xx_hardreset\n");
727
728 try_offline_again:
729 /*
730 * Force host controller to go off-line, aborting current operations
731 */
732 temp = ioread32(hcr_base + HCONTROL);
733 temp &= ~HCONTROL_ONLINE_PHY_RST;
734 iowrite32(temp, hcr_base + HCONTROL);
735
736 /* Poll for controller to go offline */
737 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE,
738 1, 500);
739
740 if (temp & ONLINE) {
741 ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i);
742
743 /*
744 * Try to offline controller atleast twice
745 */
746 i++;
747 if (i == 2)
748 goto err;
749 else
750 goto try_offline_again;
751 }
752
753 DPRINTK("hardreset, controller off-lined\n");
754 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
755 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
756
757 /*
758 * PHY reset should remain asserted for atleast 1ms
759 */
760 ata_msleep(ap, 1);
761
762 /*
763 * Now, bring the host controller online again, this can take time
764 * as PHY reset and communication establishment, 1st D2H FIS and
765 * device signature update is done, on safe side assume 500ms
766 * NOTE : Host online status may be indicated immediately!!
767 */
768
769 temp = ioread32(hcr_base + HCONTROL);
770 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
771 temp |= HCONTROL_PMP_ATTACHED;
772 iowrite32(temp, hcr_base + HCONTROL);
773
774 temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500);
775
776 if (!(temp & ONLINE)) {
777 ata_port_err(ap, "Hardreset failed, not on-lined\n");
778 goto err;
779 }
780
781 DPRINTK("hardreset, controller off-lined & on-lined\n");
782 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
783 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
784
785 /*
786 * First, wait for the PHYRDY change to occur before waiting for
787 * the signature, and also verify if SStatus indicates device
788 * presence
789 */
790
791 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500);
792 if ((!(temp & 0x10)) || ata_link_offline(link)) {
793 ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n",
794 ioread32(hcr_base + HSTATUS));
795 *class = ATA_DEV_NONE;
796 return 0;
797 }
798
799 /*
800 * Wait for the first D2H from device,i.e,signature update notification
801 */
802 start_jiffies = jiffies;
803 temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10,
804 500, jiffies_to_msecs(deadline - start_jiffies));
805
806 if ((temp & 0xFF) != 0x18) {
807 ata_port_warn(ap, "No Signature Update\n");
808 *class = ATA_DEV_NONE;
809 goto do_followup_srst;
810 } else {
811 ata_port_info(ap, "Signature Update detected @ %d msecs\n",
812 jiffies_to_msecs(jiffies - start_jiffies));
813 *class = sata_fsl_dev_classify(ap);
814 return 0;
815 }
816
817 do_followup_srst:
818 /*
819 * request libATA to perform follow-up softreset
820 */
821 return -EAGAIN;
822
823 err:
824 return -EIO;
825 }
826
827 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
828 unsigned long deadline)
829 {
830 struct ata_port *ap = link->ap;
831 struct sata_fsl_port_priv *pp = ap->private_data;
832 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
833 void __iomem *hcr_base = host_priv->hcr_base;
834 int pmp = sata_srst_pmp(link);
835 u32 temp;
836 struct ata_taskfile tf;
837 u8 *cfis;
838 u32 Serror;
839
840 DPRINTK("in xx_softreset\n");
841
842 if (ata_link_offline(link)) {
843 DPRINTK("PHY reports no device\n");
844 *class = ATA_DEV_NONE;
845 return 0;
846 }
847
848 /*
849 * Send a device reset (SRST) explicitly on command slot #0
850 * Check : will the command queue (reg) be cleared during offlining ??
851 * Also we will be online only if Phy commn. has been established
852 * and device presence has been detected, therefore if we have
853 * reached here, we can send a command to the target device
854 */
855
856 DPRINTK("Sending SRST/device reset\n");
857
858 ata_tf_init(link->device, &tf);
859 cfis = (u8 *) &pp->cmdentry->cfis;
860
861 /* device reset/SRST is a control register update FIS, uses tag0 */
862 sata_fsl_setup_cmd_hdr_entry(pp, 0,
863 SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
864
865 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
866 ata_tf_to_fis(&tf, pmp, 0, cfis);
867
868 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
869 cfis[0], cfis[1], cfis[2], cfis[3]);
870
871 /*
872 * Queue SRST command to the controller/device, ensure that no
873 * other commands are active on the controller/device
874 */
875
876 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
877 ioread32(CQ + hcr_base),
878 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
879
880 iowrite32(0xFFFF, CC + hcr_base);
881 if (pmp != SATA_PMP_CTRL_PORT)
882 iowrite32(pmp, CQPMP + hcr_base);
883 iowrite32(1, CQ + hcr_base);
884
885 temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000);
886 if (temp & 0x1) {
887 ata_port_warn(ap, "ATA_SRST issue failed\n");
888
889 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
890 ioread32(CQ + hcr_base),
891 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
892
893 sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
894
895 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
896 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
897 DPRINTK("Serror = 0x%x\n", Serror);
898 goto err;
899 }
900
901 ata_msleep(ap, 1);
902
903 /*
904 * SATA device enters reset state after receiving a Control register
905 * FIS with SRST bit asserted and it awaits another H2D Control reg.
906 * FIS with SRST bit cleared, then the device does internal diags &
907 * initialization, followed by indicating it's initialization status
908 * using ATA signature D2H register FIS to the host controller.
909 */
910
911 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE,
912 0, 0, 5);
913
914 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
915 ata_tf_to_fis(&tf, pmp, 0, cfis);
916
917 if (pmp != SATA_PMP_CTRL_PORT)
918 iowrite32(pmp, CQPMP + hcr_base);
919 iowrite32(1, CQ + hcr_base);
920 ata_msleep(ap, 150); /* ?? */
921
922 /*
923 * The above command would have signalled an interrupt on command
924 * complete, which needs special handling, by clearing the Nth
925 * command bit of the CCreg
926 */
927 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
928
929 DPRINTK("SATA FSL : Now checking device signature\n");
930
931 *class = ATA_DEV_NONE;
932
933 /* Verify if SStatus indicates device presence */
934 if (ata_link_online(link)) {
935 /*
936 * if we are here, device presence has been detected,
937 * 1st D2H FIS would have been received, but sfis in
938 * command desc. is not updated, but signature register
939 * would have been updated
940 */
941
942 *class = sata_fsl_dev_classify(ap);
943
944 DPRINTK("class = %d\n", *class);
945 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
946 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
947 }
948
949 return 0;
950
951 err:
952 return -EIO;
953 }
954
955 static void sata_fsl_error_handler(struct ata_port *ap)
956 {
957
958 DPRINTK("in xx_error_handler\n");
959 sata_pmp_error_handler(ap);
960
961 }
962
963 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
964 {
965 if (qc->flags & ATA_QCFLAG_FAILED)
966 qc->err_mask |= AC_ERR_OTHER;
967
968 if (qc->err_mask) {
969 /* make DMA engine forget about the failed command */
970
971 }
972 }
973
974 static void sata_fsl_error_intr(struct ata_port *ap)
975 {
976 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
977 void __iomem *hcr_base = host_priv->hcr_base;
978 u32 hstatus, dereg=0, cereg = 0, SError = 0;
979 unsigned int err_mask = 0, action = 0;
980 int freeze = 0, abort=0;
981 struct ata_link *link = NULL;
982 struct ata_queued_cmd *qc = NULL;
983 struct ata_eh_info *ehi;
984
985 hstatus = ioread32(hcr_base + HSTATUS);
986 cereg = ioread32(hcr_base + CE);
987
988 /* first, analyze and record host port events */
989 link = &ap->link;
990 ehi = &link->eh_info;
991 ata_ehi_clear_desc(ehi);
992
993 /*
994 * Handle & Clear SError
995 */
996
997 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
998 if (unlikely(SError & 0xFFFF0000))
999 sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
1000
1001 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
1002 hstatus, cereg, ioread32(hcr_base + DE), SError);
1003
1004 /* handle fatal errors */
1005 if (hstatus & FATAL_ERROR_DECODE) {
1006 ehi->err_mask |= AC_ERR_ATA_BUS;
1007 ehi->action |= ATA_EH_SOFTRESET;
1008
1009 freeze = 1;
1010 }
1011
1012 /* Handle SDB FIS receive & notify update */
1013 if (hstatus & INT_ON_SNOTIFY_UPDATE)
1014 sata_async_notification(ap);
1015
1016 /* Handle PHYRDY change notification */
1017 if (hstatus & INT_ON_PHYRDY_CHG) {
1018 DPRINTK("SATA FSL: PHYRDY change indication\n");
1019
1020 /* Setup a soft-reset EH action */
1021 ata_ehi_hotplugged(ehi);
1022 ata_ehi_push_desc(ehi, "%s", "PHY RDY changed");
1023 freeze = 1;
1024 }
1025
1026 /* handle single device errors */
1027 if (cereg) {
1028 /*
1029 * clear the command error, also clears queue to the device
1030 * in error, and we can (re)issue commands to this device.
1031 * When a device is in error all commands queued into the
1032 * host controller and at the device are considered aborted
1033 * and the queue for that device is stopped. Now, after
1034 * clearing the device error, we can issue commands to the
1035 * device to interrogate it to find the source of the error.
1036 */
1037 abort = 1;
1038
1039 DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
1040 ioread32(hcr_base + CE), ioread32(hcr_base + DE));
1041
1042 /* find out the offending link and qc */
1043 if (ap->nr_pmp_links) {
1044 unsigned int dev_num;
1045
1046 dereg = ioread32(hcr_base + DE);
1047 iowrite32(dereg, hcr_base + DE);
1048 iowrite32(cereg, hcr_base + CE);
1049
1050 dev_num = ffs(dereg) - 1;
1051 if (dev_num < ap->nr_pmp_links && dereg != 0) {
1052 link = &ap->pmp_link[dev_num];
1053 ehi = &link->eh_info;
1054 qc = ata_qc_from_tag(ap, link->active_tag);
1055 /*
1056 * We should consider this as non fatal error,
1057 * and TF must be updated as done below.
1058 */
1059
1060 err_mask |= AC_ERR_DEV;
1061
1062 } else {
1063 err_mask |= AC_ERR_HSM;
1064 action |= ATA_EH_HARDRESET;
1065 freeze = 1;
1066 }
1067 } else {
1068 dereg = ioread32(hcr_base + DE);
1069 iowrite32(dereg, hcr_base + DE);
1070 iowrite32(cereg, hcr_base + CE);
1071
1072 qc = ata_qc_from_tag(ap, link->active_tag);
1073 /*
1074 * We should consider this as non fatal error,
1075 * and TF must be updated as done below.
1076 */
1077 err_mask |= AC_ERR_DEV;
1078 }
1079 }
1080
1081 /* record error info */
1082 if (qc)
1083 qc->err_mask |= err_mask;
1084 else
1085 ehi->err_mask |= err_mask;
1086
1087 ehi->action |= action;
1088
1089 /* freeze or abort */
1090 if (freeze)
1091 ata_port_freeze(ap);
1092 else if (abort) {
1093 if (qc)
1094 ata_link_abort(qc->dev->link);
1095 else
1096 ata_port_abort(ap);
1097 }
1098 }
1099
1100 static void sata_fsl_host_intr(struct ata_port *ap)
1101 {
1102 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1103 void __iomem *hcr_base = host_priv->hcr_base;
1104 u32 hstatus, done_mask = 0;
1105 struct ata_queued_cmd *qc;
1106 u32 SError;
1107
1108 hstatus = ioread32(hcr_base + HSTATUS);
1109
1110 sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
1111
1112 if (unlikely(SError & 0xFFFF0000)) {
1113 DPRINTK("serror @host_intr : 0x%x\n", SError);
1114 sata_fsl_error_intr(ap);
1115 }
1116
1117 if (unlikely(hstatus & INT_ON_ERROR)) {
1118 DPRINTK("error interrupt!!\n");
1119 sata_fsl_error_intr(ap);
1120 return;
1121 }
1122
1123 /* Read command completed register */
1124 done_mask = ioread32(hcr_base + CC);
1125
1126 VPRINTK("Status of all queues :\n");
1127 VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
1128 done_mask,
1129 ioread32(hcr_base + CA),
1130 ioread32(hcr_base + CE),
1131 ioread32(hcr_base + CQ),
1132 ap->qc_active);
1133
1134 if (done_mask & ap->qc_active) {
1135 int i;
1136 /* clear CC bit, this will also complete the interrupt */
1137 iowrite32(done_mask, hcr_base + CC);
1138
1139 DPRINTK("Status of all queues :\n");
1140 DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
1141 done_mask, ioread32(hcr_base + CA),
1142 ioread32(hcr_base + CE));
1143
1144 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
1145 if (done_mask & (1 << i))
1146 DPRINTK
1147 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
1148 i, ioread32(hcr_base + CC),
1149 ioread32(hcr_base + CA));
1150 }
1151 ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
1152 return;
1153
1154 } else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) {
1155 iowrite32(1, hcr_base + CC);
1156 qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1157
1158 DPRINTK("completing non-ncq cmd, CC=0x%x\n",
1159 ioread32(hcr_base + CC));
1160
1161 if (qc) {
1162 ata_qc_complete(qc);
1163 }
1164 } else {
1165 /* Spurious Interrupt!! */
1166 DPRINTK("spurious interrupt!!, CC = 0x%x\n",
1167 ioread32(hcr_base + CC));
1168 iowrite32(done_mask, hcr_base + CC);
1169 return;
1170 }
1171 }
1172
1173 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
1174 {
1175 struct ata_host *host = dev_instance;
1176 struct sata_fsl_host_priv *host_priv = host->private_data;
1177 void __iomem *hcr_base = host_priv->hcr_base;
1178 u32 interrupt_enables;
1179 unsigned handled = 0;
1180 struct ata_port *ap;
1181
1182 /* ack. any pending IRQs for this controller/port */
1183 interrupt_enables = ioread32(hcr_base + HSTATUS);
1184 interrupt_enables &= 0x3F;
1185
1186 DPRINTK("interrupt status 0x%x\n", interrupt_enables);
1187
1188 if (!interrupt_enables)
1189 return IRQ_NONE;
1190
1191 spin_lock(&host->lock);
1192
1193 /* Assuming one port per host controller */
1194
1195 ap = host->ports[0];
1196 if (ap) {
1197 sata_fsl_host_intr(ap);
1198 } else {
1199 dev_warn(host->dev, "interrupt on disabled port 0\n");
1200 }
1201
1202 iowrite32(interrupt_enables, hcr_base + HSTATUS);
1203 handled = 1;
1204
1205 spin_unlock(&host->lock);
1206
1207 return IRQ_RETVAL(handled);
1208 }
1209
1210 /*
1211 * Multiple ports are represented by multiple SATA controllers with
1212 * one port per controller
1213 */
1214 static int sata_fsl_init_controller(struct ata_host *host)
1215 {
1216 struct sata_fsl_host_priv *host_priv = host->private_data;
1217 void __iomem *hcr_base = host_priv->hcr_base;
1218 u32 temp;
1219
1220 /*
1221 * NOTE : We cannot bring the controller online before setting
1222 * the CHBA, hence main controller initialization is done as
1223 * part of the port_start() callback
1224 */
1225
1226 /* ack. any pending IRQs for this controller/port */
1227 temp = ioread32(hcr_base + HSTATUS);
1228 if (temp & 0x3F)
1229 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
1230
1231 /* Keep interrupts disabled on the controller */
1232 temp = ioread32(hcr_base + HCONTROL);
1233 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
1234
1235 /* Disable interrupt coalescing control(icc), for the moment */
1236 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
1237 iowrite32(0x01000000, hcr_base + ICC);
1238
1239 /* clear error registers, SError is cleared by libATA */
1240 iowrite32(0x00000FFFF, hcr_base + CE);
1241 iowrite32(0x00000FFFF, hcr_base + DE);
1242
1243 /*
1244 * host controller will be brought on-line, during xx_port_start()
1245 * callback, that should also initiate the OOB, COMINIT sequence
1246 */
1247
1248 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1249 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1250
1251 return 0;
1252 }
1253
1254 /*
1255 * scsi mid-layer and libata interface structures
1256 */
1257 static struct scsi_host_template sata_fsl_sht = {
1258 ATA_NCQ_SHT("sata_fsl"),
1259 .can_queue = SATA_FSL_QUEUE_DEPTH,
1260 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
1261 .dma_boundary = ATA_DMA_BOUNDARY,
1262 };
1263
1264 static struct ata_port_operations sata_fsl_ops = {
1265 .inherits = &sata_pmp_port_ops,
1266
1267 .qc_defer = ata_std_qc_defer,
1268 .qc_prep = sata_fsl_qc_prep,
1269 .qc_issue = sata_fsl_qc_issue,
1270 .qc_fill_rtf = sata_fsl_qc_fill_rtf,
1271
1272 .scr_read = sata_fsl_scr_read,
1273 .scr_write = sata_fsl_scr_write,
1274
1275 .freeze = sata_fsl_freeze,
1276 .thaw = sata_fsl_thaw,
1277 .softreset = sata_fsl_softreset,
1278 .hardreset = sata_fsl_hardreset,
1279 .pmp_softreset = sata_fsl_softreset,
1280 .error_handler = sata_fsl_error_handler,
1281 .post_internal_cmd = sata_fsl_post_internal_cmd,
1282
1283 .port_start = sata_fsl_port_start,
1284 .port_stop = sata_fsl_port_stop,
1285
1286 .pmp_attach = sata_fsl_pmp_attach,
1287 .pmp_detach = sata_fsl_pmp_detach,
1288 };
1289
1290 static const struct ata_port_info sata_fsl_port_info[] = {
1291 {
1292 .flags = SATA_FSL_HOST_FLAGS,
1293 .pio_mask = ATA_PIO4,
1294 .udma_mask = ATA_UDMA6,
1295 .port_ops = &sata_fsl_ops,
1296 },
1297 };
1298
1299 static int sata_fsl_probe(struct platform_device *ofdev)
1300 {
1301 int retval = -ENXIO;
1302 void __iomem *hcr_base = NULL;
1303 void __iomem *ssr_base = NULL;
1304 void __iomem *csr_base = NULL;
1305 struct sata_fsl_host_priv *host_priv = NULL;
1306 int irq;
1307 struct ata_host *host;
1308 u32 temp;
1309
1310 struct ata_port_info pi = sata_fsl_port_info[0];
1311 const struct ata_port_info *ppi[] = { &pi, NULL };
1312
1313 dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n");
1314
1315 hcr_base = of_iomap(ofdev->dev.of_node, 0);
1316 if (!hcr_base)
1317 goto error_exit_with_cleanup;
1318
1319 ssr_base = hcr_base + 0x100;
1320 csr_base = hcr_base + 0x140;
1321
1322 if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) {
1323 temp = ioread32(csr_base + TRANSCFG);
1324 temp = temp & 0xffffffe0;
1325 iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG);
1326 }
1327
1328 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
1329 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
1330 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
1331
1332 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
1333 if (!host_priv)
1334 goto error_exit_with_cleanup;
1335
1336 host_priv->hcr_base = hcr_base;
1337 host_priv->ssr_base = ssr_base;
1338 host_priv->csr_base = csr_base;
1339
1340 irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
1341 if (irq < 0) {
1342 dev_err(&ofdev->dev, "invalid irq from platform\n");
1343 goto error_exit_with_cleanup;
1344 }
1345 host_priv->irq = irq;
1346
1347 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2"))
1348 host_priv->data_snoop = DATA_SNOOP_ENABLE_V2;
1349 else
1350 host_priv->data_snoop = DATA_SNOOP_ENABLE_V1;
1351
1352 /* allocate host structure */
1353 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
1354
1355 /* host->iomap is not used currently */
1356 host->private_data = host_priv;
1357
1358 /* initialize host controller */
1359 sata_fsl_init_controller(host);
1360
1361 /*
1362 * Now, register with libATA core, this will also initiate the
1363 * device discovery process, invoking our port_start() handler &
1364 * error_handler() to execute a dummy Softreset EH session
1365 */
1366 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
1367 &sata_fsl_sht);
1368
1369 dev_set_drvdata(&ofdev->dev, host);
1370
1371 return 0;
1372
1373 error_exit_with_cleanup:
1374
1375 if (hcr_base)
1376 iounmap(hcr_base);
1377 if (host_priv)
1378 kfree(host_priv);
1379
1380 return retval;
1381 }
1382
1383 static int sata_fsl_remove(struct platform_device *ofdev)
1384 {
1385 struct ata_host *host = dev_get_drvdata(&ofdev->dev);
1386 struct sata_fsl_host_priv *host_priv = host->private_data;
1387
1388 ata_host_detach(host);
1389
1390 dev_set_drvdata(&ofdev->dev, NULL);
1391
1392 irq_dispose_mapping(host_priv->irq);
1393 iounmap(host_priv->hcr_base);
1394 kfree(host_priv);
1395
1396 return 0;
1397 }
1398
1399 #ifdef CONFIG_PM
1400 static int sata_fsl_suspend(struct platform_device *op, pm_message_t state)
1401 {
1402 struct ata_host *host = dev_get_drvdata(&op->dev);
1403 return ata_host_suspend(host, state);
1404 }
1405
1406 static int sata_fsl_resume(struct platform_device *op)
1407 {
1408 struct ata_host *host = dev_get_drvdata(&op->dev);
1409 struct sata_fsl_host_priv *host_priv = host->private_data;
1410 int ret;
1411 void __iomem *hcr_base = host_priv->hcr_base;
1412 struct ata_port *ap = host->ports[0];
1413 struct sata_fsl_port_priv *pp = ap->private_data;
1414
1415 ret = sata_fsl_init_controller(host);
1416 if (ret) {
1417 dev_err(&op->dev, "Error initializing hardware\n");
1418 return ret;
1419 }
1420
1421 /* Recovery the CHBA register in host controller cmd register set */
1422 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
1423
1424 ata_host_resume(host);
1425 return 0;
1426 }
1427 #endif
1428
1429 static struct of_device_id fsl_sata_match[] = {
1430 {
1431 .compatible = "fsl,pq-sata",
1432 },
1433 {
1434 .compatible = "fsl,pq-sata-v2",
1435 },
1436 {},
1437 };
1438
1439 MODULE_DEVICE_TABLE(of, fsl_sata_match);
1440
1441 static struct platform_driver fsl_sata_driver = {
1442 .driver = {
1443 .name = "fsl-sata",
1444 .owner = THIS_MODULE,
1445 .of_match_table = fsl_sata_match,
1446 },
1447 .probe = sata_fsl_probe,
1448 .remove = sata_fsl_remove,
1449 #ifdef CONFIG_PM
1450 .suspend = sata_fsl_suspend,
1451 .resume = sata_fsl_resume,
1452 #endif
1453 };
1454
1455 static int __init sata_fsl_init(void)
1456 {
1457 platform_driver_register(&fsl_sata_driver);
1458 return 0;
1459 }
1460
1461 static void __exit sata_fsl_exit(void)
1462 {
1463 platform_driver_unregister(&fsl_sata_driver);
1464 }
1465
1466 MODULE_LICENSE("GPL");
1467 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
1468 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
1469 MODULE_VERSION("1.10");
1470
1471 module_init(sata_fsl_init);
1472 module_exit(sata_fsl_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree