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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / ata / sata_fsl.c
blobd015b4adcfe098402fd9e8b307a829f580e36636
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 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
22 #include <scsi/scsi_host.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <linux/libata.h>
25 #include <asm/io.h>
26 #include <linux/of_platform.h>
27
28 /* Controller information */
29 enum {
30 SATA_FSL_QUEUE_DEPTH = 16,
31 SATA_FSL_MAX_PRD = 63,
32 SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
33 SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
34
35 SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
36 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
37 ATA_FLAG_NCQ),
38 SATA_FSL_HOST_LFLAGS = ATA_LFLAG_SKIP_D2H_BSY,
39
40 SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
41 SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
42 SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
43
44 /*
45 * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
46 * chained indirect PRDEs upto a max count of 63.
47 * We are allocating an array of 63 PRDEs contigiously, but PRDE#15 will
48 * be setup as an indirect descriptor, pointing to it's next
49 * (contigious) PRDE. Though chained indirect PRDE arrays are
50 * supported,it will be more efficient to use a direct PRDT and
51 * a single chain/link to indirect PRDE array/PRDT.
52 */
53
54 SATA_FSL_CMD_DESC_CFIS_SZ = 32,
55 SATA_FSL_CMD_DESC_SFIS_SZ = 32,
56 SATA_FSL_CMD_DESC_ACMD_SZ = 16,
57 SATA_FSL_CMD_DESC_RSRVD = 16,
58
59 SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
60 SATA_FSL_CMD_DESC_SFIS_SZ +
61 SATA_FSL_CMD_DESC_ACMD_SZ +
62 SATA_FSL_CMD_DESC_RSRVD +
63 SATA_FSL_MAX_PRD * 16),
64
65 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
66 (SATA_FSL_CMD_DESC_CFIS_SZ +
67 SATA_FSL_CMD_DESC_SFIS_SZ +
68 SATA_FSL_CMD_DESC_ACMD_SZ +
69 SATA_FSL_CMD_DESC_RSRVD),
70
71 SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
72 SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
73 SATA_FSL_CMD_DESC_AR_SZ),
74
75 /*
76 * MPC8315 has two SATA controllers, SATA1 & SATA2
77 * (one port per controller)
78 * MPC837x has 2/4 controllers, one port per controller
79 */
80
81 SATA_FSL_MAX_PORTS = 1,
82
83 SATA_FSL_IRQ_FLAG = IRQF_SHARED,
84 };
85
86 /*
87 * Host Controller command register set - per port
88 */
89 enum {
90 CQ = 0,
91 CA = 8,
92 CC = 0x10,
93 CE = 0x18,
94 DE = 0x20,
95 CHBA = 0x24,
96 HSTATUS = 0x28,
97 HCONTROL = 0x2C,
98 CQPMP = 0x30,
99 SIGNATURE = 0x34,
100 ICC = 0x38,
101
102 /*
103 * Host Status Register (HStatus) bitdefs
104 */
105 ONLINE = (1 << 31),
106 GOING_OFFLINE = (1 << 30),
107 BIST_ERR = (1 << 29),
108
109 FATAL_ERR_HC_MASTER_ERR = (1 << 18),
110 FATAL_ERR_PARITY_ERR_TX = (1 << 17),
111 FATAL_ERR_PARITY_ERR_RX = (1 << 16),
112 FATAL_ERR_DATA_UNDERRUN = (1 << 13),
113 FATAL_ERR_DATA_OVERRUN = (1 << 12),
114 FATAL_ERR_CRC_ERR_TX = (1 << 11),
115 FATAL_ERR_CRC_ERR_RX = (1 << 10),
116 FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
117 FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
118
119 FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
120 FATAL_ERR_PARITY_ERR_TX |
121 FATAL_ERR_PARITY_ERR_RX |
122 FATAL_ERR_DATA_UNDERRUN |
123 FATAL_ERR_DATA_OVERRUN |
124 FATAL_ERR_CRC_ERR_TX |
125 FATAL_ERR_CRC_ERR_RX |
126 FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
127
128 INT_ON_FATAL_ERR = (1 << 5),
129 INT_ON_PHYRDY_CHG = (1 << 4),
130
131 INT_ON_SIGNATURE_UPDATE = (1 << 3),
132 INT_ON_SNOTIFY_UPDATE = (1 << 2),
133 INT_ON_SINGL_DEVICE_ERR = (1 << 1),
134 INT_ON_CMD_COMPLETE = 1,
135
136 INT_ON_ERROR = INT_ON_FATAL_ERR |
137 INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
138
139 /*
140 * Host Control Register (HControl) bitdefs
141 */
142 HCONTROL_ONLINE_PHY_RST = (1 << 31),
143 HCONTROL_FORCE_OFFLINE = (1 << 30),
144 HCONTROL_PARITY_PROT_MOD = (1 << 14),
145 HCONTROL_DPATH_PARITY = (1 << 12),
146 HCONTROL_SNOOP_ENABLE = (1 << 10),
147 HCONTROL_PMP_ATTACHED = (1 << 9),
148 HCONTROL_COPYOUT_STATFIS = (1 << 8),
149 IE_ON_FATAL_ERR = (1 << 5),
150 IE_ON_PHYRDY_CHG = (1 << 4),
151 IE_ON_SIGNATURE_UPDATE = (1 << 3),
152 IE_ON_SNOTIFY_UPDATE = (1 << 2),
153 IE_ON_SINGL_DEVICE_ERR = (1 << 1),
154 IE_ON_CMD_COMPLETE = 1,
155
156 DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
157 IE_ON_SIGNATURE_UPDATE |
158 IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
159
160 EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
161 DATA_SNOOP_ENABLE = (1 << 22),
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 /* PHY (link-layer) configuration control */
190 enum {
191 PHY_BIST_ENABLE = 0x01,
192 };
193
194 /*
195 * Command Header Table entry, i.e, command slot
196 * 4 Dwords per command slot, command header size == 64 Dwords.
197 */
198 struct cmdhdr_tbl_entry {
199 u32 cda;
200 u32 prde_fis_len;
201 u32 ttl;
202 u32 desc_info;
203 };
204
205 /*
206 * Description information bitdefs
207 */
208 enum {
209 VENDOR_SPECIFIC_BIST = (1 << 10),
210 CMD_DESC_SNOOP_ENABLE = (1 << 9),
211 FPDMA_QUEUED_CMD = (1 << 8),
212 SRST_CMD = (1 << 7),
213 BIST = (1 << 6),
214 ATAPI_CMD = (1 << 5),
215 };
216
217 /*
218 * Command Descriptor
219 */
220 struct command_desc {
221 u8 cfis[8 * 4];
222 u8 sfis[8 * 4];
223 u8 acmd[4 * 4];
224 u8 fill[4 * 4];
225 u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
226 u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
227 };
228
229 /*
230 * Physical region table descriptor(PRD)
231 */
232
233 struct prde {
234 u32 dba;
235 u8 fill[2 * 4];
236 u32 ddc_and_ext;
237 };
238
239 /*
240 * ata_port private data
241 * This is our per-port instance data.
242 */
243 struct sata_fsl_port_priv {
244 struct cmdhdr_tbl_entry *cmdslot;
245 dma_addr_t cmdslot_paddr;
246 struct command_desc *cmdentry;
247 dma_addr_t cmdentry_paddr;
248
249 /*
250 * SATA FSL controller has a Status FIS which should contain the
251 * received D2H FIS & taskfile registers. This SFIS is present in
252 * the command descriptor, and to have a ready reference to it,
253 * we are caching it here, quite similar to what is done in H/W on
254 * AHCI compliant devices by copying taskfile fields to a 32-bit
255 * register.
256 */
257
258 struct ata_taskfile tf;
259 };
260
261 /*
262 * ata_port->host_set private data
263 */
264 struct sata_fsl_host_priv {
265 void __iomem *hcr_base;
266 void __iomem *ssr_base;
267 void __iomem *csr_base;
268 int irq;
269 };
270
271 static inline unsigned int sata_fsl_tag(unsigned int tag,
272 void __iomem *hcr_base)
273 {
274 /* We let libATA core do actual (queue) tag allocation */
275
276 /* all non NCQ/queued commands should have tag#0 */
277 if (ata_tag_internal(tag)) {
278 DPRINTK("mapping internal cmds to tag#0\n");
279 return 0;
280 }
281
282 if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
283 DPRINTK("tag %d invalid : out of range\n", tag);
284 return 0;
285 }
286
287 if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
288 DPRINTK("tag %d invalid : in use!!\n", tag);
289 return 0;
290 }
291
292 return tag;
293 }
294
295 static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
296 unsigned int tag, u32 desc_info,
297 u32 data_xfer_len, u8 num_prde,
298 u8 fis_len)
299 {
300 dma_addr_t cmd_descriptor_address;
301
302 cmd_descriptor_address = pp->cmdentry_paddr +
303 tag * SATA_FSL_CMD_DESC_SIZE;
304
305 /* NOTE: both data_xfer_len & fis_len are Dword counts */
306
307 pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
308 pp->cmdslot[tag].prde_fis_len =
309 cpu_to_le32((num_prde << 16) | (fis_len << 2));
310 pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
311 pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
312
313 VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
314 pp->cmdslot[tag].cda,
315 pp->cmdslot[tag].prde_fis_len,
316 pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
317
318 }
319
320 static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
321 u32 *ttl, dma_addr_t cmd_desc_paddr)
322 {
323 struct scatterlist *sg;
324 unsigned int num_prde = 0;
325 u32 ttl_dwords = 0;
326
327 /*
328 * NOTE : direct & indirect prdt's are contigiously allocated
329 */
330 struct prde *prd = (struct prde *)&((struct command_desc *)
331 cmd_desc)->prdt;
332
333 struct prde *prd_ptr_to_indirect_ext = NULL;
334 unsigned indirect_ext_segment_sz = 0;
335 dma_addr_t indirect_ext_segment_paddr;
336
337 VPRINTK("SATA FSL : cd = 0x%x, prd = 0x%x\n", cmd_desc, prd);
338
339 indirect_ext_segment_paddr = cmd_desc_paddr +
340 SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
341
342 ata_for_each_sg(sg, qc) {
343 dma_addr_t sg_addr = sg_dma_address(sg);
344 u32 sg_len = sg_dma_len(sg);
345
346 VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%x, sg_len = %d\n",
347 sg_addr, sg_len);
348
349 /* warn if each s/g element is not dword aligned */
350 if (sg_addr & 0x03)
351 ata_port_printk(qc->ap, KERN_ERR,
352 "s/g addr unaligned : 0x%x\n", sg_addr);
353 if (sg_len & 0x03)
354 ata_port_printk(qc->ap, KERN_ERR,
355 "s/g len unaligned : 0x%x\n", sg_len);
356
357 if ((num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1)) &&
358 (qc->n_iter + 1 != qc->n_elem)) {
359 VPRINTK("setting indirect prde\n");
360 prd_ptr_to_indirect_ext = prd;
361 prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
362 indirect_ext_segment_sz = 0;
363 ++prd;
364 ++num_prde;
365 }
366
367 ttl_dwords += sg_len;
368 prd->dba = cpu_to_le32(sg_addr);
369 prd->ddc_and_ext =
370 cpu_to_le32(DATA_SNOOP_ENABLE | (sg_len & ~0x03));
371
372 VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
373 ttl_dwords, prd->dba, prd->ddc_and_ext);
374
375 ++num_prde;
376 ++prd;
377 if (prd_ptr_to_indirect_ext)
378 indirect_ext_segment_sz += sg_len;
379 }
380
381 if (prd_ptr_to_indirect_ext) {
382 /* set indirect extension flag along with indirect ext. size */
383 prd_ptr_to_indirect_ext->ddc_and_ext =
384 cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
385 DATA_SNOOP_ENABLE |
386 (indirect_ext_segment_sz & ~0x03)));
387 }
388
389 *ttl = ttl_dwords;
390 return num_prde;
391 }
392
393 static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
394 {
395 struct ata_port *ap = qc->ap;
396 struct sata_fsl_port_priv *pp = ap->private_data;
397 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
398 void __iomem *hcr_base = host_priv->hcr_base;
399 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
400 struct command_desc *cd;
401 u32 desc_info = CMD_DESC_SNOOP_ENABLE;
402 u32 num_prde = 0;
403 u32 ttl_dwords = 0;
404 dma_addr_t cd_paddr;
405
406 cd = (struct command_desc *)pp->cmdentry + tag;
407 cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
408
409 ata_tf_to_fis(&qc->tf, 0, 1, (u8 *) &cd->cfis);
410
411 VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
412 cd->cfis[0], cd->cfis[1], cd->cfis[2]);
413
414 if (qc->tf.protocol == ATA_PROT_NCQ) {
415 VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
416 cd->cfis[3], cd->cfis[11]);
417 }
418
419 /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
420 if (is_atapi_taskfile(&qc->tf)) {
421 desc_info |= ATAPI_CMD;
422 memset((void *)&cd->acmd, 0, 32);
423 memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
424 }
425
426 if (qc->flags & ATA_QCFLAG_DMAMAP)
427 num_prde = sata_fsl_fill_sg(qc, (void *)cd,
428 &ttl_dwords, cd_paddr);
429
430 if (qc->tf.protocol == ATA_PROT_NCQ)
431 desc_info |= FPDMA_QUEUED_CMD;
432
433 sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
434 num_prde, 5);
435
436 VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
437 desc_info, ttl_dwords, num_prde);
438 }
439
440 static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
441 {
442 struct ata_port *ap = qc->ap;
443 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
444 void __iomem *hcr_base = host_priv->hcr_base;
445 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
446
447 VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
448 ioread32(CQ + hcr_base),
449 ioread32(CA + hcr_base),
450 ioread32(CE + hcr_base), ioread32(CC + hcr_base));
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), ioread32(COMMANDSTAT + csr_base));
462
463 return 0;
464 }
465
466 static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
467 u32 val)
468 {
469 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
470 void __iomem *ssr_base = host_priv->ssr_base;
471 unsigned int sc_reg;
472
473 switch (sc_reg_in) {
474 case SCR_STATUS:
475 case SCR_ERROR:
476 case SCR_CONTROL:
477 case SCR_ACTIVE:
478 sc_reg = sc_reg_in;
479 break;
480 default:
481 return -EINVAL;
482 }
483
484 VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
485
486 iowrite32(val, ssr_base + (sc_reg * 4));
487 return 0;
488 }
489
490 static int sata_fsl_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
491 u32 *val)
492 {
493 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
494 void __iomem *ssr_base = host_priv->ssr_base;
495 unsigned int sc_reg;
496
497 switch (sc_reg_in) {
498 case SCR_STATUS:
499 case SCR_ERROR:
500 case SCR_CONTROL:
501 case SCR_ACTIVE:
502 sc_reg = sc_reg_in;
503 break;
504 default:
505 return -EINVAL;
506 }
507
508 VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
509
510 *val = ioread32(ssr_base + (sc_reg * 4));
511 return 0;
512 }
513
514 static void sata_fsl_freeze(struct ata_port *ap)
515 {
516 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
517 void __iomem *hcr_base = host_priv->hcr_base;
518 u32 temp;
519
520 VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
521 ioread32(CQ + hcr_base),
522 ioread32(CA + hcr_base),
523 ioread32(CE + hcr_base), ioread32(DE + hcr_base));
524 VPRINTK("CmdStat = 0x%x\n", ioread32(csr_base + COMMANDSTAT));
525
526 /* disable interrupts on the controller/port */
527 temp = ioread32(hcr_base + HCONTROL);
528 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
529
530 VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
531 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
532 }
533
534 static void sata_fsl_thaw(struct ata_port *ap)
535 {
536 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
537 void __iomem *hcr_base = host_priv->hcr_base;
538 u32 temp;
539
540 /* ack. any pending IRQs for this controller/port */
541 temp = ioread32(hcr_base + HSTATUS);
542
543 VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
544
545 if (temp & 0x3F)
546 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
547
548 /* enable interrupts on the controller/port */
549 temp = ioread32(hcr_base + HCONTROL);
550 iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
551
552 VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
553 ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
554 }
555
556 /*
557 * NOTE : 1st D2H FIS from device does not update sfis in command descriptor.
558 */
559 static inline void sata_fsl_cache_taskfile_from_d2h_fis(struct ata_queued_cmd
560 *qc,
561 struct ata_port *ap)
562 {
563 struct sata_fsl_port_priv *pp = ap->private_data;
564 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
565 void __iomem *hcr_base = host_priv->hcr_base;
566 unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
567 struct command_desc *cd;
568
569 cd = pp->cmdentry + tag;
570
571 ata_tf_from_fis(cd->sfis, &pp->tf);
572 }
573
574 static u8 sata_fsl_check_status(struct ata_port *ap)
575 {
576 struct sata_fsl_port_priv *pp = ap->private_data;
577
578 return pp->tf.command;
579 }
580
581 static void sata_fsl_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
582 {
583 struct sata_fsl_port_priv *pp = ap->private_data;
584
585 *tf = pp->tf;
586 }
587
588 static int sata_fsl_port_start(struct ata_port *ap)
589 {
590 struct device *dev = ap->host->dev;
591 struct sata_fsl_port_priv *pp;
592 int retval;
593 void *mem;
594 dma_addr_t mem_dma;
595 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
596 void __iomem *hcr_base = host_priv->hcr_base;
597 u32 temp;
598
599 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
600 if (!pp)
601 return -ENOMEM;
602
603 /*
604 * allocate per command dma alignment pad buffer, which is used
605 * internally by libATA to ensure that all transfers ending on
606 * unaligned boundaries are padded, to align on Dword boundaries
607 */
608 retval = ata_pad_alloc(ap, dev);
609 if (retval) {
610 kfree(pp);
611 return retval;
612 }
613
614 mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
615 GFP_KERNEL);
616 if (!mem) {
617 ata_pad_free(ap, dev);
618 kfree(pp);
619 return -ENOMEM;
620 }
621 memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
622
623 pp->cmdslot = mem;
624 pp->cmdslot_paddr = mem_dma;
625
626 mem += SATA_FSL_CMD_SLOT_SIZE;
627 mem_dma += SATA_FSL_CMD_SLOT_SIZE;
628
629 pp->cmdentry = mem;
630 pp->cmdentry_paddr = mem_dma;
631
632 ap->private_data = pp;
633
634 VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
635 pp->cmdslot_paddr, pp->cmdentry_paddr);
636
637 /* Now, update the CHBA register in host controller cmd register set */
638 iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
639
640 /*
641 * Now, we can bring the controller on-line & also initiate
642 * the COMINIT sequence, we simply return here and the boot-probing
643 * & device discovery process is re-initiated by libATA using a
644 * Softreset EH (dummy) session. Hence, boot probing and device
645 * discovey will be part of sata_fsl_softreset() callback.
646 */
647
648 temp = ioread32(hcr_base + HCONTROL);
649 iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
650
651 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
652 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
653 VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
654
655 #ifdef CONFIG_MPC8315_DS
656 /*
657 * Workaround for 8315DS board 3gbps link-up issue,
658 * currently limit SATA port to GEN1 speed
659 */
660 sata_fsl_scr_read(ap, SCR_CONTROL, &temp);
661 temp &= ~(0xF << 4);
662 temp |= (0x1 << 4);
663 sata_fsl_scr_write(ap, SCR_CONTROL, temp);
664
665 sata_fsl_scr_read(ap, SCR_CONTROL, &temp);
666 dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n",
667 temp);
668 #endif
669
670 return 0;
671 }
672
673 static void sata_fsl_port_stop(struct ata_port *ap)
674 {
675 struct device *dev = ap->host->dev;
676 struct sata_fsl_port_priv *pp = ap->private_data;
677 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
678 void __iomem *hcr_base = host_priv->hcr_base;
679 u32 temp;
680
681 /*
682 * Force host controller to go off-line, aborting current operations
683 */
684 temp = ioread32(hcr_base + HCONTROL);
685 temp &= ~HCONTROL_ONLINE_PHY_RST;
686 temp |= HCONTROL_FORCE_OFFLINE;
687 iowrite32(temp, hcr_base + HCONTROL);
688
689 /* Poll for controller to go offline - should happen immediately */
690 ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
691
692 ap->private_data = NULL;
693 dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
694 pp->cmdslot, pp->cmdslot_paddr);
695
696 ata_pad_free(ap, dev);
697 kfree(pp);
698 }
699
700 static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
701 {
702 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
703 void __iomem *hcr_base = host_priv->hcr_base;
704 struct ata_taskfile tf;
705 u32 temp;
706
707 temp = ioread32(hcr_base + SIGNATURE);
708
709 VPRINTK("raw sig = 0x%x\n", temp);
710 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
711 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
712
713 tf.lbah = (temp >> 24) & 0xff;
714 tf.lbam = (temp >> 16) & 0xff;
715 tf.lbal = (temp >> 8) & 0xff;
716 tf.nsect = temp & 0xff;
717
718 return ata_dev_classify(&tf);
719 }
720
721 static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
722 unsigned long deadline)
723 {
724 struct ata_port *ap = link->ap;
725 struct sata_fsl_port_priv *pp = ap->private_data;
726 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
727 void __iomem *hcr_base = host_priv->hcr_base;
728 u32 temp;
729 struct ata_taskfile tf;
730 u8 *cfis;
731 u32 Serror;
732 int i = 0;
733 unsigned long start_jiffies;
734
735 DPRINTK("in xx_softreset\n");
736
737 try_offline_again:
738 /*
739 * Force host controller to go off-line, aborting current operations
740 */
741 temp = ioread32(hcr_base + HCONTROL);
742 temp &= ~HCONTROL_ONLINE_PHY_RST;
743 iowrite32(temp, hcr_base + HCONTROL);
744
745 /* Poll for controller to go offline */
746 temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 500);
747
748 if (temp & ONLINE) {
749 ata_port_printk(ap, KERN_ERR,
750 "Softreset failed, not off-lined %d\n", i);
751
752 /*
753 * Try to offline controller atleast twice
754 */
755 i++;
756 if (i == 2)
757 goto err;
758 else
759 goto try_offline_again;
760 }
761
762 DPRINTK("softreset, controller off-lined\n");
763 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
764 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
765
766 /*
767 * PHY reset should remain asserted for atleast 1ms
768 */
769 msleep(1);
770
771 /*
772 * Now, bring the host controller online again, this can take time
773 * as PHY reset and communication establishment, 1st D2H FIS and
774 * device signature update is done, on safe side assume 500ms
775 * NOTE : Host online status may be indicated immediately!!
776 */
777
778 temp = ioread32(hcr_base + HCONTROL);
779 temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
780 iowrite32(temp, hcr_base + HCONTROL);
781
782 temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, 0, 1, 500);
783
784 if (!(temp & ONLINE)) {
785 ata_port_printk(ap, KERN_ERR,
786 "Softreset failed, not on-lined\n");
787 goto err;
788 }
789
790 DPRINTK("softreset, controller off-lined & on-lined\n");
791 VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
792 VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
793
794 /*
795 * First, wait for the PHYRDY change to occur before waiting for
796 * the signature, and also verify if SStatus indicates device
797 * presence
798 */
799
800 temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0, 1, 500);
801 if ((!(temp & 0x10)) || ata_link_offline(link)) {
802 ata_port_printk(ap, KERN_WARNING,
803 "No Device OR PHYRDY change,Hstatus = 0x%x\n",
804 ioread32(hcr_base + HSTATUS));
805 goto err;
806 }
807
808 /*
809 * Wait for the first D2H from device,i.e,signature update notification
810 */
811 start_jiffies = jiffies;
812 temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0x10,
813 500, jiffies_to_msecs(deadline - start_jiffies));
814
815 if ((temp & 0xFF) != 0x18) {
816 ata_port_printk(ap, KERN_WARNING, "No Signature Update\n");
817 goto err;
818 } else {
819 ata_port_printk(ap, KERN_INFO,
820 "Signature Update detected @ %d msecs\n",
821 jiffies_to_msecs(jiffies - start_jiffies));
822 }
823
824 /*
825 * Send a device reset (SRST) explicitly on command slot #0
826 * Check : will the command queue (reg) be cleared during offlining ??
827 * Also we will be online only if Phy commn. has been established
828 * and device presence has been detected, therefore if we have
829 * reached here, we can send a command to the target device
830 */
831
832 DPRINTK("Sending SRST/device reset\n");
833
834 ata_tf_init(link->device, &tf);
835 cfis = (u8 *) &pp->cmdentry->cfis;
836
837 /* device reset/SRST is a control register update FIS, uses tag0 */
838 sata_fsl_setup_cmd_hdr_entry(pp, 0,
839 SRST_CMD | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
840
841 tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
842 ata_tf_to_fis(&tf, 0, 0, cfis);
843
844 DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
845 cfis[0], cfis[1], cfis[2], cfis[3]);
846
847 /*
848 * Queue SRST command to the controller/device, ensure that no
849 * other commands are active on the controller/device
850 */
851
852 DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
853 ioread32(CQ + hcr_base),
854 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
855
856 iowrite32(0xFFFF, CC + hcr_base);
857 iowrite32(1, CQ + hcr_base);
858
859 temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000);
860 if (temp & 0x1) {
861 ata_port_printk(ap, KERN_WARNING, "ATA_SRST issue failed\n");
862
863 DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
864 ioread32(CQ + hcr_base),
865 ioread32(CA + hcr_base), ioread32(CC + hcr_base));
866
867 sata_fsl_scr_read(ap, SCR_ERROR, &Serror);
868
869 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
870 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
871 DPRINTK("Serror = 0x%x\n", Serror);
872 goto err;
873 }
874
875 msleep(1);
876
877 /*
878 * SATA device enters reset state after receving a Control register
879 * FIS with SRST bit asserted and it awaits another H2D Control reg.
880 * FIS with SRST bit cleared, then the device does internal diags &
881 * initialization, followed by indicating it's initialization status
882 * using ATA signature D2H register FIS to the host controller.
883 */
884
885 sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
886
887 tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
888 ata_tf_to_fis(&tf, 0, 0, cfis);
889
890 iowrite32(1, CQ + hcr_base);
891 msleep(150); /* ?? */
892
893 /*
894 * The above command would have signalled an interrupt on command
895 * complete, which needs special handling, by clearing the Nth
896 * command bit of the CCreg
897 */
898 iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
899
900 DPRINTK("SATA FSL : Now checking device signature\n");
901
902 *class = ATA_DEV_NONE;
903
904 /* Verify if SStatus indicates device presence */
905 if (ata_link_online(link)) {
906 /*
907 * if we are here, device presence has been detected,
908 * 1st D2H FIS would have been received, but sfis in
909 * command desc. is not updated, but signature register
910 * would have been updated
911 */
912
913 *class = sata_fsl_dev_classify(ap);
914
915 DPRINTK("class = %d\n", *class);
916 VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
917 VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
918 }
919
920 return 0;
921
922 err:
923 return -EIO;
924 }
925
926 static void sata_fsl_error_handler(struct ata_port *ap)
927 {
928
929 DPRINTK("in xx_error_handler\n");
930
931 /* perform recovery */
932 ata_do_eh(ap, ata_std_prereset, sata_fsl_softreset, sata_std_hardreset,
933 ata_std_postreset);
934 }
935
936 static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
937 {
938 if (qc->flags & ATA_QCFLAG_FAILED)
939 qc->err_mask |= AC_ERR_OTHER;
940
941 if (qc->err_mask) {
942 /* make DMA engine forget about the failed command */
943
944 }
945 }
946
947 static void sata_fsl_irq_clear(struct ata_port *ap)
948 {
949 /* unused */
950 }
951
952 static void sata_fsl_error_intr(struct ata_port *ap)
953 {
954 struct ata_link *link = &ap->link;
955 struct ata_eh_info *ehi = &link->eh_info;
956 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
957 void __iomem *hcr_base = host_priv->hcr_base;
958 u32 hstatus, dereg, cereg = 0, SError = 0;
959 unsigned int err_mask = 0, action = 0;
960 struct ata_queued_cmd *qc;
961 int freeze = 0;
962
963 hstatus = ioread32(hcr_base + HSTATUS);
964 cereg = ioread32(hcr_base + CE);
965
966 ata_ehi_clear_desc(ehi);
967
968 /*
969 * Handle & Clear SError
970 */
971
972 sata_fsl_scr_read(ap, SCR_ERROR, &SError);
973 if (unlikely(SError & 0xFFFF0000)) {
974 sata_fsl_scr_write(ap, SCR_ERROR, SError);
975 err_mask |= AC_ERR_ATA_BUS;
976 }
977
978 DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
979 hstatus, cereg, ioread32(hcr_base + DE), SError);
980
981 /* handle single device errors */
982 if (cereg) {
983 /*
984 * clear the command error, also clears queue to the device
985 * in error, and we can (re)issue commands to this device.
986 * When a device is in error all commands queued into the
987 * host controller and at the device are considered aborted
988 * and the queue for that device is stopped. Now, after
989 * clearing the device error, we can issue commands to the
990 * device to interrogate it to find the source of the error.
991 */
992 dereg = ioread32(hcr_base + DE);
993 iowrite32(dereg, hcr_base + DE);
994 iowrite32(cereg, hcr_base + CE);
995
996 DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
997 ioread32(hcr_base + CE), ioread32(hcr_base + DE));
998 /*
999 * We should consider this as non fatal error, and TF must
1000 * be updated as done below.
1001 */
1002
1003 err_mask |= AC_ERR_DEV;
1004 }
1005
1006 /* handle fatal errors */
1007 if (hstatus & FATAL_ERROR_DECODE) {
1008 err_mask |= AC_ERR_ATA_BUS;
1009 action |= ATA_EH_SOFTRESET;
1010 /* how will fatal error interrupts be completed ?? */
1011 freeze = 1;
1012 }
1013
1014 /* Handle PHYRDY change notification */
1015 if (hstatus & INT_ON_PHYRDY_CHG) {
1016 DPRINTK("SATA FSL: PHYRDY change indication\n");
1017
1018 /* Setup a soft-reset EH action */
1019 ata_ehi_hotplugged(ehi);
1020 freeze = 1;
1021 }
1022
1023 /* record error info */
1024 qc = ata_qc_from_tag(ap, link->active_tag);
1025
1026 if (qc) {
1027 sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap);
1028 qc->err_mask |= err_mask;
1029 } else
1030 ehi->err_mask |= err_mask;
1031
1032 ehi->action |= action;
1033 ehi->serror |= SError;
1034
1035 /* freeze or abort */
1036 if (freeze)
1037 ata_port_freeze(ap);
1038 else
1039 ata_port_abort(ap);
1040 }
1041
1042 static void sata_fsl_qc_complete(struct ata_queued_cmd *qc)
1043 {
1044 if (qc->flags & ATA_QCFLAG_RESULT_TF) {
1045 DPRINTK("xx_qc_complete called\n");
1046 sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap);
1047 }
1048 }
1049
1050 static void sata_fsl_host_intr(struct ata_port *ap)
1051 {
1052 struct ata_link *link = &ap->link;
1053 struct sata_fsl_host_priv *host_priv = ap->host->private_data;
1054 void __iomem *hcr_base = host_priv->hcr_base;
1055 u32 hstatus, qc_active = 0;
1056 struct ata_queued_cmd *qc;
1057 u32 SError;
1058
1059 hstatus = ioread32(hcr_base + HSTATUS);
1060
1061 sata_fsl_scr_read(ap, SCR_ERROR, &SError);
1062
1063 if (unlikely(SError & 0xFFFF0000)) {
1064 DPRINTK("serror @host_intr : 0x%x\n", SError);
1065 sata_fsl_error_intr(ap);
1066
1067 }
1068
1069 if (unlikely(hstatus & INT_ON_ERROR)) {
1070 DPRINTK("error interrupt!!\n");
1071 sata_fsl_error_intr(ap);
1072 return;
1073 }
1074
1075 if (link->sactive) { /* only true for NCQ commands */
1076 int i;
1077 /* Read command completed register */
1078 qc_active = ioread32(hcr_base + CC);
1079 /* clear CC bit, this will also complete the interrupt */
1080 iowrite32(qc_active, hcr_base + CC);
1081
1082 DPRINTK("Status of all queues :\n");
1083 DPRINTK("qc_active/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
1084 qc_active, ioread32(hcr_base + CA),
1085 ioread32(hcr_base + CE));
1086
1087 for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
1088 if (qc_active & (1 << i)) {
1089 qc = ata_qc_from_tag(ap, i);
1090 if (qc) {
1091 sata_fsl_qc_complete(qc);
1092 ata_qc_complete(qc);
1093 }
1094 DPRINTK
1095 ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
1096 i, ioread32(hcr_base + CC),
1097 ioread32(hcr_base + CA));
1098 }
1099 }
1100 return;
1101
1102 } else if (ap->qc_active) {
1103 iowrite32(1, hcr_base + CC);
1104 qc = ata_qc_from_tag(ap, link->active_tag);
1105
1106 DPRINTK("completing non-ncq cmd, tag=%d,CC=0x%x\n",
1107 link->active_tag, ioread32(hcr_base + CC));
1108
1109 if (qc) {
1110 sata_fsl_qc_complete(qc);
1111 ata_qc_complete(qc);
1112 }
1113 } else {
1114 /* Spurious Interrupt!! */
1115 DPRINTK("spurious interrupt!!, CC = 0x%x\n",
1116 ioread32(hcr_base + CC));
1117 return;
1118 }
1119 }
1120
1121 static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
1122 {
1123 struct ata_host *host = dev_instance;
1124 struct sata_fsl_host_priv *host_priv = host->private_data;
1125 void __iomem *hcr_base = host_priv->hcr_base;
1126 u32 interrupt_enables;
1127 unsigned handled = 0;
1128 struct ata_port *ap;
1129
1130 /* ack. any pending IRQs for this controller/port */
1131 interrupt_enables = ioread32(hcr_base + HSTATUS);
1132 interrupt_enables &= 0x3F;
1133
1134 DPRINTK("interrupt status 0x%x\n", interrupt_enables);
1135
1136 if (!interrupt_enables)
1137 return IRQ_NONE;
1138
1139 spin_lock(&host->lock);
1140
1141 /* Assuming one port per host controller */
1142
1143 ap = host->ports[0];
1144 if (ap) {
1145 sata_fsl_host_intr(ap);
1146 } else {
1147 dev_printk(KERN_WARNING, host->dev,
1148 "interrupt on disabled port 0\n");
1149 }
1150
1151 iowrite32(interrupt_enables, hcr_base + HSTATUS);
1152 handled = 1;
1153
1154 spin_unlock(&host->lock);
1155
1156 return IRQ_RETVAL(handled);
1157 }
1158
1159 /*
1160 * Multiple ports are represented by multiple SATA controllers with
1161 * one port per controller
1162 */
1163 static int sata_fsl_init_controller(struct ata_host *host)
1164 {
1165 struct sata_fsl_host_priv *host_priv = host->private_data;
1166 void __iomem *hcr_base = host_priv->hcr_base;
1167 u32 temp;
1168
1169 /*
1170 * NOTE : We cannot bring the controller online before setting
1171 * the CHBA, hence main controller initialization is done as
1172 * part of the port_start() callback
1173 */
1174
1175 /* ack. any pending IRQs for this controller/port */
1176 temp = ioread32(hcr_base + HSTATUS);
1177 if (temp & 0x3F)
1178 iowrite32((temp & 0x3F), hcr_base + HSTATUS);
1179
1180 /* Keep interrupts disabled on the controller */
1181 temp = ioread32(hcr_base + HCONTROL);
1182 iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
1183
1184 /* Disable interrupt coalescing control(icc), for the moment */
1185 DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
1186 iowrite32(0x01000000, hcr_base + ICC);
1187
1188 /* clear error registers, SError is cleared by libATA */
1189 iowrite32(0x00000FFFF, hcr_base + CE);
1190 iowrite32(0x00000FFFF, hcr_base + DE);
1191
1192 /* initially assuming no Port multiplier, set CQPMP to 0 */
1193 iowrite32(0x0, hcr_base + CQPMP);
1194
1195 /*
1196 * host controller will be brought on-line, during xx_port_start()
1197 * callback, that should also initiate the OOB, COMINIT sequence
1198 */
1199
1200 DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
1201 DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
1202
1203 return 0;
1204 }
1205
1206 /*
1207 * scsi mid-layer and libata interface structures
1208 */
1209 static struct scsi_host_template sata_fsl_sht = {
1210 .module = THIS_MODULE,
1211 .name = "sata_fsl",
1212 .ioctl = ata_scsi_ioctl,
1213 .queuecommand = ata_scsi_queuecmd,
1214 .change_queue_depth = ata_scsi_change_queue_depth,
1215 .can_queue = SATA_FSL_QUEUE_DEPTH,
1216 .this_id = ATA_SHT_THIS_ID,
1217 .sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
1218 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
1219 .emulated = ATA_SHT_EMULATED,
1220 .use_clustering = ATA_SHT_USE_CLUSTERING,
1221 .proc_name = "sata_fsl",
1222 .dma_boundary = ATA_DMA_BOUNDARY,
1223 .slave_configure = ata_scsi_slave_config,
1224 .slave_destroy = ata_scsi_slave_destroy,
1225 .bios_param = ata_std_bios_param,
1226 };
1227
1228 static const struct ata_port_operations sata_fsl_ops = {
1229 .check_status = sata_fsl_check_status,
1230 .check_altstatus = sata_fsl_check_status,
1231 .dev_select = ata_noop_dev_select,
1232
1233 .tf_read = sata_fsl_tf_read,
1234
1235 .qc_prep = sata_fsl_qc_prep,
1236 .qc_issue = sata_fsl_qc_issue,
1237 .irq_clear = sata_fsl_irq_clear,
1238
1239 .scr_read = sata_fsl_scr_read,
1240 .scr_write = sata_fsl_scr_write,
1241
1242 .freeze = sata_fsl_freeze,
1243 .thaw = sata_fsl_thaw,
1244 .error_handler = sata_fsl_error_handler,
1245 .post_internal_cmd = sata_fsl_post_internal_cmd,
1246
1247 .port_start = sata_fsl_port_start,
1248 .port_stop = sata_fsl_port_stop,
1249 };
1250
1251 static const struct ata_port_info sata_fsl_port_info[] = {
1252 {
1253 .flags = SATA_FSL_HOST_FLAGS,
1254 .link_flags = SATA_FSL_HOST_LFLAGS,
1255 .pio_mask = 0x1f, /* pio 0-4 */
1256 .udma_mask = 0x7f, /* udma 0-6 */
1257 .port_ops = &sata_fsl_ops,
1258 },
1259 };
1260
1261 static int sata_fsl_probe(struct of_device *ofdev,
1262 const struct of_device_id *match)
1263 {
1264 int retval = 0;
1265 void __iomem *hcr_base = NULL;
1266 void __iomem *ssr_base = NULL;
1267 void __iomem *csr_base = NULL;
1268 struct sata_fsl_host_priv *host_priv = NULL;
1269 struct resource *r;
1270 int irq;
1271 struct ata_host *host;
1272
1273 struct ata_port_info pi = sata_fsl_port_info[0];
1274 const struct ata_port_info *ppi[] = { &pi, NULL };
1275
1276 dev_printk(KERN_INFO, &ofdev->dev,
1277 "Sata FSL Platform/CSB Driver init\n");
1278
1279 r = kmalloc(sizeof(struct resource), GFP_KERNEL);
1280
1281 hcr_base = of_iomap(ofdev->node, 0);
1282 if (!hcr_base)
1283 goto error_exit_with_cleanup;
1284
1285 ssr_base = hcr_base + 0x100;
1286 csr_base = hcr_base + 0x140;
1287
1288 DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
1289 DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
1290 DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
1291
1292 host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
1293 if (!host_priv)
1294 goto error_exit_with_cleanup;
1295
1296 host_priv->hcr_base = hcr_base;
1297 host_priv->ssr_base = ssr_base;
1298 host_priv->csr_base = csr_base;
1299
1300 irq = irq_of_parse_and_map(ofdev->node, 0);
1301 if (irq < 0) {
1302 dev_printk(KERN_ERR, &ofdev->dev, "invalid irq from platform\n");
1303 goto error_exit_with_cleanup;
1304 }
1305 host_priv->irq = irq;
1306
1307 /* allocate host structure */
1308 host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
1309
1310 /* host->iomap is not used currently */
1311 host->private_data = host_priv;
1312
1313 /* setup port(s) */
1314
1315 host->ports[0]->ioaddr.cmd_addr = host_priv->hcr_base;
1316 host->ports[0]->ioaddr.scr_addr = host_priv->ssr_base;
1317
1318 /* initialize host controller */
1319 sata_fsl_init_controller(host);
1320
1321 /*
1322 * Now, register with libATA core, this will also initiate the
1323 * device discovery process, invoking our port_start() handler &
1324 * error_handler() to execute a dummy Softreset EH session
1325 */
1326 ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
1327 &sata_fsl_sht);
1328
1329 dev_set_drvdata(&ofdev->dev, host);
1330
1331 return 0;
1332
1333 error_exit_with_cleanup:
1334
1335 if (hcr_base)
1336 iounmap(hcr_base);
1337 if (host_priv)
1338 kfree(host_priv);
1339
1340 return retval;
1341 }
1342
1343 static int sata_fsl_remove(struct of_device *ofdev)
1344 {
1345 struct ata_host *host = dev_get_drvdata(&ofdev->dev);
1346 struct sata_fsl_host_priv *host_priv = host->private_data;
1347
1348 ata_host_detach(host);
1349
1350 dev_set_drvdata(&ofdev->dev, NULL);
1351
1352 irq_dispose_mapping(host_priv->irq);
1353 iounmap(host_priv->hcr_base);
1354 kfree(host_priv);
1355
1356 return 0;
1357 }
1358
1359 static struct of_device_id fsl_sata_match[] = {
1360 {
1361 .compatible = "fsl,mpc8315-sata",
1362 },
1363 {
1364 .compatible = "fsl,mpc8379-sata",
1365 },
1366 {},
1367 };
1368
1369 MODULE_DEVICE_TABLE(of, fsl_sata_match);
1370
1371 static struct of_platform_driver fsl_sata_driver = {
1372 .name = "fsl-sata",
1373 .match_table = fsl_sata_match,
1374 .probe = sata_fsl_probe,
1375 .remove = sata_fsl_remove,
1376 };
1377
1378 static int __init sata_fsl_init(void)
1379 {
1380 of_register_platform_driver(&fsl_sata_driver);
1381 return 0;
1382 }
1383
1384 static void __exit sata_fsl_exit(void)
1385 {
1386 of_unregister_platform_driver(&fsl_sata_driver);
1387 }
1388
1389 MODULE_LICENSE("GPL");
1390 MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
1391 MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
1392 MODULE_VERSION("1.10");
1393
1394 module_init(sata_fsl_init);
1395 module_exit(sata_fsl_exit);
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