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[mirror_ubuntu-hirsute-kernel.git] / drivers / ata / sata_inic162x.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sata_inic162x.c - Driver for Initio 162x SATA controllers
4 *
5 * Copyright 2006 SUSE Linux Products GmbH
6 * Copyright 2006 Tejun Heo <teheo@novell.com>
7 *
8 * **** WARNING ****
9 *
10 * This driver never worked properly and unfortunately data corruption is
11 * relatively common. There isn't anyone working on the driver and there's
12 * no support from the vendor. Do not use this driver in any production
13 * environment.
14 *
15 * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491
16 * https://bugzilla.kernel.org/show_bug.cgi?id=60565
17 *
18 * *****************
19 *
20 * This controller is eccentric and easily locks up if something isn't
21 * right. Documentation is available at initio's website but it only
22 * documents registers (not programming model).
23 *
24 * This driver has interesting history. The first version was written
25 * from the documentation and a 2.4 IDE driver posted on a Taiwan
26 * company, which didn't use any IDMA features and couldn't handle
27 * LBA48. The resulting driver couldn't handle LBA48 devices either
28 * making it pretty useless.
29 *
30 * After a while, initio picked the driver up, renamed it to
31 * sata_initio162x, updated it to use IDMA for ATA DMA commands and
32 * posted it on their website. It only used ATA_PROT_DMA for IDMA and
33 * attaching both devices and issuing IDMA and !IDMA commands
34 * simultaneously broke it due to PIRQ masking interaction but it did
35 * show how to use the IDMA (ADMA + some initio specific twists)
36 * engine.
37 *
38 * Then, I picked up their changes again and here's the usable driver
39 * which uses IDMA for everything. Everything works now including
40 * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some
41 * issues tho. Result Tf is not resported properly, NCQ isn't
42 * supported yet and CD/DVD writing works with DMA assisted PIO
43 * protocol (which, for native SATA devices, shouldn't cause any
44 * noticeable difference).
45 *
46 * Anyways, so, here's finally a working driver for inic162x. Enjoy!
47 *
48 * initio: If you guys wanna improve the driver regarding result TF
49 * access and other stuff, please feel free to contact me. I'll be
50 * happy to assist.
51 */
52
53 #include <linux/gfp.h>
54 #include <linux/kernel.h>
55 #include <linux/module.h>
56 #include <linux/pci.h>
57 #include <scsi/scsi_host.h>
58 #include <linux/libata.h>
59 #include <linux/blkdev.h>
60 #include <scsi/scsi_device.h>
61
62 #define DRV_NAME "sata_inic162x"
63 #define DRV_VERSION "0.4"
64
65 enum {
66 MMIO_BAR_PCI = 5,
67 MMIO_BAR_CARDBUS = 1,
68
69 NR_PORTS = 2,
70
71 IDMA_CPB_TBL_SIZE = 4 * 32,
72
73 INIC_DMA_BOUNDARY = 0xffffff,
74
75 HOST_ACTRL = 0x08,
76 HOST_CTL = 0x7c,
77 HOST_STAT = 0x7e,
78 HOST_IRQ_STAT = 0xbc,
79 HOST_IRQ_MASK = 0xbe,
80
81 PORT_SIZE = 0x40,
82
83 /* registers for ATA TF operation */
84 PORT_TF_DATA = 0x00,
85 PORT_TF_FEATURE = 0x01,
86 PORT_TF_NSECT = 0x02,
87 PORT_TF_LBAL = 0x03,
88 PORT_TF_LBAM = 0x04,
89 PORT_TF_LBAH = 0x05,
90 PORT_TF_DEVICE = 0x06,
91 PORT_TF_COMMAND = 0x07,
92 PORT_TF_ALT_STAT = 0x08,
93 PORT_IRQ_STAT = 0x09,
94 PORT_IRQ_MASK = 0x0a,
95 PORT_PRD_CTL = 0x0b,
96 PORT_PRD_ADDR = 0x0c,
97 PORT_PRD_XFERLEN = 0x10,
98 PORT_CPB_CPBLAR = 0x18,
99 PORT_CPB_PTQFIFO = 0x1c,
100
101 /* IDMA register */
102 PORT_IDMA_CTL = 0x14,
103 PORT_IDMA_STAT = 0x16,
104
105 PORT_RPQ_FIFO = 0x1e,
106 PORT_RPQ_CNT = 0x1f,
107
108 PORT_SCR = 0x20,
109
110 /* HOST_CTL bits */
111 HCTL_LEDEN = (1 << 3), /* enable LED operation */
112 HCTL_IRQOFF = (1 << 8), /* global IRQ off */
113 HCTL_FTHD0 = (1 << 10), /* fifo threshold 0 */
114 HCTL_FTHD1 = (1 << 11), /* fifo threshold 1*/
115 HCTL_PWRDWN = (1 << 12), /* power down PHYs */
116 HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */
117 HCTL_RPGSEL = (1 << 15), /* register page select */
118
119 HCTL_KNOWN_BITS = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST |
120 HCTL_RPGSEL,
121
122 /* HOST_IRQ_(STAT|MASK) bits */
123 HIRQ_PORT0 = (1 << 0),
124 HIRQ_PORT1 = (1 << 1),
125 HIRQ_SOFT = (1 << 14),
126 HIRQ_GLOBAL = (1 << 15), /* STAT only */
127
128 /* PORT_IRQ_(STAT|MASK) bits */
129 PIRQ_OFFLINE = (1 << 0), /* device unplugged */
130 PIRQ_ONLINE = (1 << 1), /* device plugged */
131 PIRQ_COMPLETE = (1 << 2), /* completion interrupt */
132 PIRQ_FATAL = (1 << 3), /* fatal error */
133 PIRQ_ATA = (1 << 4), /* ATA interrupt */
134 PIRQ_REPLY = (1 << 5), /* reply FIFO not empty */
135 PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */
136
137 PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
138 PIRQ_MASK_DEFAULT = PIRQ_REPLY | PIRQ_ATA,
139 PIRQ_MASK_FREEZE = 0xff,
140
141 /* PORT_PRD_CTL bits */
142 PRD_CTL_START = (1 << 0),
143 PRD_CTL_WR = (1 << 3),
144 PRD_CTL_DMAEN = (1 << 7), /* DMA enable */
145
146 /* PORT_IDMA_CTL bits */
147 IDMA_CTL_RST_ATA = (1 << 2), /* hardreset ATA bus */
148 IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinery */
149 IDMA_CTL_GO = (1 << 7), /* IDMA mode go */
150 IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */
151
152 /* PORT_IDMA_STAT bits */
153 IDMA_STAT_PERR = (1 << 0), /* PCI ERROR MODE */
154 IDMA_STAT_CPBERR = (1 << 1), /* ADMA CPB error */
155 IDMA_STAT_LGCY = (1 << 3), /* ADMA legacy */
156 IDMA_STAT_UIRQ = (1 << 4), /* ADMA unsolicited irq */
157 IDMA_STAT_STPD = (1 << 5), /* ADMA stopped */
158 IDMA_STAT_PSD = (1 << 6), /* ADMA pause */
159 IDMA_STAT_DONE = (1 << 7), /* ADMA done */
160
161 IDMA_STAT_ERR = IDMA_STAT_PERR | IDMA_STAT_CPBERR,
162
163 /* CPB Control Flags*/
164 CPB_CTL_VALID = (1 << 0), /* CPB valid */
165 CPB_CTL_QUEUED = (1 << 1), /* queued command */
166 CPB_CTL_DATA = (1 << 2), /* data, rsvd in datasheet */
167 CPB_CTL_IEN = (1 << 3), /* PCI interrupt enable */
168 CPB_CTL_DEVDIR = (1 << 4), /* device direction control */
169
170 /* CPB Response Flags */
171 CPB_RESP_DONE = (1 << 0), /* ATA command complete */
172 CPB_RESP_REL = (1 << 1), /* ATA release */
173 CPB_RESP_IGNORED = (1 << 2), /* CPB ignored */
174 CPB_RESP_ATA_ERR = (1 << 3), /* ATA command error */
175 CPB_RESP_SPURIOUS = (1 << 4), /* ATA spurious interrupt error */
176 CPB_RESP_UNDERFLOW = (1 << 5), /* APRD deficiency length error */
177 CPB_RESP_OVERFLOW = (1 << 6), /* APRD exccess length error */
178 CPB_RESP_CPB_ERR = (1 << 7), /* CPB error flag */
179
180 /* PRD Control Flags */
181 PRD_DRAIN = (1 << 1), /* ignore data excess */
182 PRD_CDB = (1 << 2), /* atapi packet command pointer */
183 PRD_DIRECT_INTR = (1 << 3), /* direct interrupt */
184 PRD_DMA = (1 << 4), /* data transfer method */
185 PRD_WRITE = (1 << 5), /* data dir, rsvd in datasheet */
186 PRD_IOM = (1 << 6), /* io/memory transfer */
187 PRD_END = (1 << 7), /* APRD chain end */
188 };
189
190 /* Comman Parameter Block */
191 struct inic_cpb {
192 u8 resp_flags; /* Response Flags */
193 u8 error; /* ATA Error */
194 u8 status; /* ATA Status */
195 u8 ctl_flags; /* Control Flags */
196 __le32 len; /* Total Transfer Length */
197 __le32 prd; /* First PRD pointer */
198 u8 rsvd[4];
199 /* 16 bytes */
200 u8 feature; /* ATA Feature */
201 u8 hob_feature; /* ATA Ex. Feature */
202 u8 device; /* ATA Device/Head */
203 u8 mirctl; /* Mirror Control */
204 u8 nsect; /* ATA Sector Count */
205 u8 hob_nsect; /* ATA Ex. Sector Count */
206 u8 lbal; /* ATA Sector Number */
207 u8 hob_lbal; /* ATA Ex. Sector Number */
208 u8 lbam; /* ATA Cylinder Low */
209 u8 hob_lbam; /* ATA Ex. Cylinder Low */
210 u8 lbah; /* ATA Cylinder High */
211 u8 hob_lbah; /* ATA Ex. Cylinder High */
212 u8 command; /* ATA Command */
213 u8 ctl; /* ATA Control */
214 u8 slave_error; /* Slave ATA Error */
215 u8 slave_status; /* Slave ATA Status */
216 /* 32 bytes */
217 } __packed;
218
219 /* Physical Region Descriptor */
220 struct inic_prd {
221 __le32 mad; /* Physical Memory Address */
222 __le16 len; /* Transfer Length */
223 u8 rsvd;
224 u8 flags; /* Control Flags */
225 } __packed;
226
227 struct inic_pkt {
228 struct inic_cpb cpb;
229 struct inic_prd prd[LIBATA_MAX_PRD + 1]; /* + 1 for cdb */
230 u8 cdb[ATAPI_CDB_LEN];
231 } __packed;
232
233 struct inic_host_priv {
234 void __iomem *mmio_base;
235 u16 cached_hctl;
236 };
237
238 struct inic_port_priv {
239 struct inic_pkt *pkt;
240 dma_addr_t pkt_dma;
241 u32 *cpb_tbl;
242 dma_addr_t cpb_tbl_dma;
243 };
244
245 static struct scsi_host_template inic_sht = {
246 ATA_BASE_SHT(DRV_NAME),
247 .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */
248
249 /*
250 * This controller is braindamaged. dma_boundary is 0xffff like others
251 * but it will lock up the whole machine HARD if 65536 byte PRD entry
252 * is fed. Reduce maximum segment size.
253 */
254 .dma_boundary = INIC_DMA_BOUNDARY,
255 .max_segment_size = 65536 - 512,
256 };
257
258 static const int scr_map[] = {
259 [SCR_STATUS] = 0,
260 [SCR_ERROR] = 1,
261 [SCR_CONTROL] = 2,
262 };
263
264 static void __iomem *inic_port_base(struct ata_port *ap)
265 {
266 struct inic_host_priv *hpriv = ap->host->private_data;
267
268 return hpriv->mmio_base + ap->port_no * PORT_SIZE;
269 }
270
271 static void inic_reset_port(void __iomem *port_base)
272 {
273 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
274
275 /* stop IDMA engine */
276 readw(idma_ctl); /* flush */
277 msleep(1);
278
279 /* mask IRQ and assert reset */
280 writew(IDMA_CTL_RST_IDMA, idma_ctl);
281 readw(idma_ctl); /* flush */
282 msleep(1);
283
284 /* release reset */
285 writew(0, idma_ctl);
286
287 /* clear irq */
288 writeb(0xff, port_base + PORT_IRQ_STAT);
289 }
290
291 static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
292 {
293 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
294
295 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
296 return -EINVAL;
297
298 *val = readl(scr_addr + scr_map[sc_reg] * 4);
299
300 /* this controller has stuck DIAG.N, ignore it */
301 if (sc_reg == SCR_ERROR)
302 *val &= ~SERR_PHYRDY_CHG;
303 return 0;
304 }
305
306 static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
307 {
308 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
309
310 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
311 return -EINVAL;
312
313 writel(val, scr_addr + scr_map[sc_reg] * 4);
314 return 0;
315 }
316
317 static void inic_stop_idma(struct ata_port *ap)
318 {
319 void __iomem *port_base = inic_port_base(ap);
320
321 readb(port_base + PORT_RPQ_FIFO);
322 readb(port_base + PORT_RPQ_CNT);
323 writew(0, port_base + PORT_IDMA_CTL);
324 }
325
326 static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat)
327 {
328 struct ata_eh_info *ehi = &ap->link.eh_info;
329 struct inic_port_priv *pp = ap->private_data;
330 struct inic_cpb *cpb = &pp->pkt->cpb;
331 bool freeze = false;
332
333 ata_ehi_clear_desc(ehi);
334 ata_ehi_push_desc(ehi, "irq_stat=0x%x idma_stat=0x%x",
335 irq_stat, idma_stat);
336
337 inic_stop_idma(ap);
338
339 if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
340 ata_ehi_push_desc(ehi, "hotplug");
341 ata_ehi_hotplugged(ehi);
342 freeze = true;
343 }
344
345 if (idma_stat & IDMA_STAT_PERR) {
346 ata_ehi_push_desc(ehi, "PCI error");
347 freeze = true;
348 }
349
350 if (idma_stat & IDMA_STAT_CPBERR) {
351 ata_ehi_push_desc(ehi, "CPB error");
352
353 if (cpb->resp_flags & CPB_RESP_IGNORED) {
354 __ata_ehi_push_desc(ehi, " ignored");
355 ehi->err_mask |= AC_ERR_INVALID;
356 freeze = true;
357 }
358
359 if (cpb->resp_flags & CPB_RESP_ATA_ERR)
360 ehi->err_mask |= AC_ERR_DEV;
361
362 if (cpb->resp_flags & CPB_RESP_SPURIOUS) {
363 __ata_ehi_push_desc(ehi, " spurious-intr");
364 ehi->err_mask |= AC_ERR_HSM;
365 freeze = true;
366 }
367
368 if (cpb->resp_flags &
369 (CPB_RESP_UNDERFLOW | CPB_RESP_OVERFLOW)) {
370 __ata_ehi_push_desc(ehi, " data-over/underflow");
371 ehi->err_mask |= AC_ERR_HSM;
372 freeze = true;
373 }
374 }
375
376 if (freeze)
377 ata_port_freeze(ap);
378 else
379 ata_port_abort(ap);
380 }
381
382 static void inic_host_intr(struct ata_port *ap)
383 {
384 void __iomem *port_base = inic_port_base(ap);
385 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
386 u8 irq_stat;
387 u16 idma_stat;
388
389 /* read and clear IRQ status */
390 irq_stat = readb(port_base + PORT_IRQ_STAT);
391 writeb(irq_stat, port_base + PORT_IRQ_STAT);
392 idma_stat = readw(port_base + PORT_IDMA_STAT);
393
394 if (unlikely((irq_stat & PIRQ_ERR) || (idma_stat & IDMA_STAT_ERR)))
395 inic_host_err_intr(ap, irq_stat, idma_stat);
396
397 if (unlikely(!qc))
398 goto spurious;
399
400 if (likely(idma_stat & IDMA_STAT_DONE)) {
401 inic_stop_idma(ap);
402
403 /* Depending on circumstances, device error
404 * isn't reported by IDMA, check it explicitly.
405 */
406 if (unlikely(readb(port_base + PORT_TF_COMMAND) &
407 (ATA_DF | ATA_ERR)))
408 qc->err_mask |= AC_ERR_DEV;
409
410 ata_qc_complete(qc);
411 return;
412 }
413
414 spurious:
415 ata_port_warn(ap, "unhandled interrupt: cmd=0x%x irq_stat=0x%x idma_stat=0x%x\n",
416 qc ? qc->tf.command : 0xff, irq_stat, idma_stat);
417 }
418
419 static irqreturn_t inic_interrupt(int irq, void *dev_instance)
420 {
421 struct ata_host *host = dev_instance;
422 struct inic_host_priv *hpriv = host->private_data;
423 u16 host_irq_stat;
424 int i, handled = 0;
425
426 host_irq_stat = readw(hpriv->mmio_base + HOST_IRQ_STAT);
427
428 if (unlikely(!(host_irq_stat & HIRQ_GLOBAL)))
429 goto out;
430
431 spin_lock(&host->lock);
432
433 for (i = 0; i < NR_PORTS; i++)
434 if (host_irq_stat & (HIRQ_PORT0 << i)) {
435 inic_host_intr(host->ports[i]);
436 handled++;
437 }
438
439 spin_unlock(&host->lock);
440
441 out:
442 return IRQ_RETVAL(handled);
443 }
444
445 static int inic_check_atapi_dma(struct ata_queued_cmd *qc)
446 {
447 /* For some reason ATAPI_PROT_DMA doesn't work for some
448 * commands including writes and other misc ops. Use PIO
449 * protocol instead, which BTW is driven by the DMA engine
450 * anyway, so it shouldn't make much difference for native
451 * SATA devices.
452 */
453 if (atapi_cmd_type(qc->cdb[0]) == READ)
454 return 0;
455 return 1;
456 }
457
458 static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc)
459 {
460 struct scatterlist *sg;
461 unsigned int si;
462 u8 flags = 0;
463
464 if (qc->tf.flags & ATA_TFLAG_WRITE)
465 flags |= PRD_WRITE;
466
467 if (ata_is_dma(qc->tf.protocol))
468 flags |= PRD_DMA;
469
470 for_each_sg(qc->sg, sg, qc->n_elem, si) {
471 prd->mad = cpu_to_le32(sg_dma_address(sg));
472 prd->len = cpu_to_le16(sg_dma_len(sg));
473 prd->flags = flags;
474 prd++;
475 }
476
477 WARN_ON(!si);
478 prd[-1].flags |= PRD_END;
479 }
480
481 static enum ata_completion_errors inic_qc_prep(struct ata_queued_cmd *qc)
482 {
483 struct inic_port_priv *pp = qc->ap->private_data;
484 struct inic_pkt *pkt = pp->pkt;
485 struct inic_cpb *cpb = &pkt->cpb;
486 struct inic_prd *prd = pkt->prd;
487 bool is_atapi = ata_is_atapi(qc->tf.protocol);
488 bool is_data = ata_is_data(qc->tf.protocol);
489 unsigned int cdb_len = 0;
490
491 VPRINTK("ENTER\n");
492
493 if (is_atapi)
494 cdb_len = qc->dev->cdb_len;
495
496 /* prepare packet, based on initio driver */
497 memset(pkt, 0, sizeof(struct inic_pkt));
498
499 cpb->ctl_flags = CPB_CTL_VALID | CPB_CTL_IEN;
500 if (is_atapi || is_data)
501 cpb->ctl_flags |= CPB_CTL_DATA;
502
503 cpb->len = cpu_to_le32(qc->nbytes + cdb_len);
504 cpb->prd = cpu_to_le32(pp->pkt_dma + offsetof(struct inic_pkt, prd));
505
506 cpb->device = qc->tf.device;
507 cpb->feature = qc->tf.feature;
508 cpb->nsect = qc->tf.nsect;
509 cpb->lbal = qc->tf.lbal;
510 cpb->lbam = qc->tf.lbam;
511 cpb->lbah = qc->tf.lbah;
512
513 if (qc->tf.flags & ATA_TFLAG_LBA48) {
514 cpb->hob_feature = qc->tf.hob_feature;
515 cpb->hob_nsect = qc->tf.hob_nsect;
516 cpb->hob_lbal = qc->tf.hob_lbal;
517 cpb->hob_lbam = qc->tf.hob_lbam;
518 cpb->hob_lbah = qc->tf.hob_lbah;
519 }
520
521 cpb->command = qc->tf.command;
522 /* don't load ctl - dunno why. it's like that in the initio driver */
523
524 /* setup PRD for CDB */
525 if (is_atapi) {
526 memcpy(pkt->cdb, qc->cdb, ATAPI_CDB_LEN);
527 prd->mad = cpu_to_le32(pp->pkt_dma +
528 offsetof(struct inic_pkt, cdb));
529 prd->len = cpu_to_le16(cdb_len);
530 prd->flags = PRD_CDB | PRD_WRITE;
531 if (!is_data)
532 prd->flags |= PRD_END;
533 prd++;
534 }
535
536 /* setup sg table */
537 if (is_data)
538 inic_fill_sg(prd, qc);
539
540 pp->cpb_tbl[0] = pp->pkt_dma;
541
542 return AC_ERR_OK;
543 }
544
545 static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
546 {
547 struct ata_port *ap = qc->ap;
548 void __iomem *port_base = inic_port_base(ap);
549
550 /* fire up the ADMA engine */
551 writew(HCTL_FTHD0 | HCTL_LEDEN, port_base + HOST_CTL);
552 writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL);
553 writeb(0, port_base + PORT_CPB_PTQFIFO);
554
555 return 0;
556 }
557
558 static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
559 {
560 void __iomem *port_base = inic_port_base(ap);
561
562 tf->feature = readb(port_base + PORT_TF_FEATURE);
563 tf->nsect = readb(port_base + PORT_TF_NSECT);
564 tf->lbal = readb(port_base + PORT_TF_LBAL);
565 tf->lbam = readb(port_base + PORT_TF_LBAM);
566 tf->lbah = readb(port_base + PORT_TF_LBAH);
567 tf->device = readb(port_base + PORT_TF_DEVICE);
568 tf->command = readb(port_base + PORT_TF_COMMAND);
569 }
570
571 static bool inic_qc_fill_rtf(struct ata_queued_cmd *qc)
572 {
573 struct ata_taskfile *rtf = &qc->result_tf;
574 struct ata_taskfile tf;
575
576 /* FIXME: Except for status and error, result TF access
577 * doesn't work. I tried reading from BAR0/2, CPB and BAR5.
578 * None works regardless of which command interface is used.
579 * For now return true iff status indicates device error.
580 * This means that we're reporting bogus sector for RW
581 * failures. Eeekk....
582 */
583 inic_tf_read(qc->ap, &tf);
584
585 if (!(tf.command & ATA_ERR))
586 return false;
587
588 rtf->command = tf.command;
589 rtf->feature = tf.feature;
590 return true;
591 }
592
593 static void inic_freeze(struct ata_port *ap)
594 {
595 void __iomem *port_base = inic_port_base(ap);
596
597 writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK);
598 writeb(0xff, port_base + PORT_IRQ_STAT);
599 }
600
601 static void inic_thaw(struct ata_port *ap)
602 {
603 void __iomem *port_base = inic_port_base(ap);
604
605 writeb(0xff, port_base + PORT_IRQ_STAT);
606 writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK);
607 }
608
609 static int inic_check_ready(struct ata_link *link)
610 {
611 void __iomem *port_base = inic_port_base(link->ap);
612
613 return ata_check_ready(readb(port_base + PORT_TF_COMMAND));
614 }
615
616 /*
617 * SRST and SControl hardreset don't give valid signature on this
618 * controller. Only controller specific hardreset mechanism works.
619 */
620 static int inic_hardreset(struct ata_link *link, unsigned int *class,
621 unsigned long deadline)
622 {
623 struct ata_port *ap = link->ap;
624 void __iomem *port_base = inic_port_base(ap);
625 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
626 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
627 int rc;
628
629 /* hammer it into sane state */
630 inic_reset_port(port_base);
631
632 writew(IDMA_CTL_RST_ATA, idma_ctl);
633 readw(idma_ctl); /* flush */
634 ata_msleep(ap, 1);
635 writew(0, idma_ctl);
636
637 rc = sata_link_resume(link, timing, deadline);
638 if (rc) {
639 ata_link_warn(link,
640 "failed to resume link after reset (errno=%d)\n",
641 rc);
642 return rc;
643 }
644
645 *class = ATA_DEV_NONE;
646 if (ata_link_online(link)) {
647 struct ata_taskfile tf;
648
649 /* wait for link to become ready */
650 rc = ata_wait_after_reset(link, deadline, inic_check_ready);
651 /* link occupied, -ENODEV too is an error */
652 if (rc) {
653 ata_link_warn(link,
654 "device not ready after hardreset (errno=%d)\n",
655 rc);
656 return rc;
657 }
658
659 inic_tf_read(ap, &tf);
660 *class = ata_dev_classify(&tf);
661 }
662
663 return 0;
664 }
665
666 static void inic_error_handler(struct ata_port *ap)
667 {
668 void __iomem *port_base = inic_port_base(ap);
669
670 inic_reset_port(port_base);
671 ata_std_error_handler(ap);
672 }
673
674 static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
675 {
676 /* make DMA engine forget about the failed command */
677 if (qc->flags & ATA_QCFLAG_FAILED)
678 inic_reset_port(inic_port_base(qc->ap));
679 }
680
681 static void init_port(struct ata_port *ap)
682 {
683 void __iomem *port_base = inic_port_base(ap);
684 struct inic_port_priv *pp = ap->private_data;
685
686 /* clear packet and CPB table */
687 memset(pp->pkt, 0, sizeof(struct inic_pkt));
688 memset(pp->cpb_tbl, 0, IDMA_CPB_TBL_SIZE);
689
690 /* setup CPB lookup table addresses */
691 writel(pp->cpb_tbl_dma, port_base + PORT_CPB_CPBLAR);
692 }
693
694 static int inic_port_resume(struct ata_port *ap)
695 {
696 init_port(ap);
697 return 0;
698 }
699
700 static int inic_port_start(struct ata_port *ap)
701 {
702 struct device *dev = ap->host->dev;
703 struct inic_port_priv *pp;
704
705 /* alloc and initialize private data */
706 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
707 if (!pp)
708 return -ENOMEM;
709 ap->private_data = pp;
710
711 /* Alloc resources */
712 pp->pkt = dmam_alloc_coherent(dev, sizeof(struct inic_pkt),
713 &pp->pkt_dma, GFP_KERNEL);
714 if (!pp->pkt)
715 return -ENOMEM;
716
717 pp->cpb_tbl = dmam_alloc_coherent(dev, IDMA_CPB_TBL_SIZE,
718 &pp->cpb_tbl_dma, GFP_KERNEL);
719 if (!pp->cpb_tbl)
720 return -ENOMEM;
721
722 init_port(ap);
723
724 return 0;
725 }
726
727 static struct ata_port_operations inic_port_ops = {
728 .inherits = &sata_port_ops,
729
730 .check_atapi_dma = inic_check_atapi_dma,
731 .qc_prep = inic_qc_prep,
732 .qc_issue = inic_qc_issue,
733 .qc_fill_rtf = inic_qc_fill_rtf,
734
735 .freeze = inic_freeze,
736 .thaw = inic_thaw,
737 .hardreset = inic_hardreset,
738 .error_handler = inic_error_handler,
739 .post_internal_cmd = inic_post_internal_cmd,
740
741 .scr_read = inic_scr_read,
742 .scr_write = inic_scr_write,
743
744 .port_resume = inic_port_resume,
745 .port_start = inic_port_start,
746 };
747
748 static const struct ata_port_info inic_port_info = {
749 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
750 .pio_mask = ATA_PIO4,
751 .mwdma_mask = ATA_MWDMA2,
752 .udma_mask = ATA_UDMA6,
753 .port_ops = &inic_port_ops
754 };
755
756 static int init_controller(void __iomem *mmio_base, u16 hctl)
757 {
758 int i;
759 u16 val;
760
761 hctl &= ~HCTL_KNOWN_BITS;
762
763 /* Soft reset whole controller. Spec says reset duration is 3
764 * PCI clocks, be generous and give it 10ms.
765 */
766 writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL);
767 readw(mmio_base + HOST_CTL); /* flush */
768
769 for (i = 0; i < 10; i++) {
770 msleep(1);
771 val = readw(mmio_base + HOST_CTL);
772 if (!(val & HCTL_SOFTRST))
773 break;
774 }
775
776 if (val & HCTL_SOFTRST)
777 return -EIO;
778
779 /* mask all interrupts and reset ports */
780 for (i = 0; i < NR_PORTS; i++) {
781 void __iomem *port_base = mmio_base + i * PORT_SIZE;
782
783 writeb(0xff, port_base + PORT_IRQ_MASK);
784 inic_reset_port(port_base);
785 }
786
787 /* port IRQ is masked now, unmask global IRQ */
788 writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL);
789 val = readw(mmio_base + HOST_IRQ_MASK);
790 val &= ~(HIRQ_PORT0 | HIRQ_PORT1);
791 writew(val, mmio_base + HOST_IRQ_MASK);
792
793 return 0;
794 }
795
796 #ifdef CONFIG_PM_SLEEP
797 static int inic_pci_device_resume(struct pci_dev *pdev)
798 {
799 struct ata_host *host = pci_get_drvdata(pdev);
800 struct inic_host_priv *hpriv = host->private_data;
801 int rc;
802
803 rc = ata_pci_device_do_resume(pdev);
804 if (rc)
805 return rc;
806
807 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
808 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
809 if (rc)
810 return rc;
811 }
812
813 ata_host_resume(host);
814
815 return 0;
816 }
817 #endif
818
819 static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
820 {
821 const struct ata_port_info *ppi[] = { &inic_port_info, NULL };
822 struct ata_host *host;
823 struct inic_host_priv *hpriv;
824 void __iomem * const *iomap;
825 int mmio_bar;
826 int i, rc;
827
828 ata_print_version_once(&pdev->dev, DRV_VERSION);
829
830 dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n");
831
832 /* alloc host */
833 host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS);
834 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
835 if (!host || !hpriv)
836 return -ENOMEM;
837
838 host->private_data = hpriv;
839
840 /* Acquire resources and fill host. Note that PCI and cardbus
841 * use different BARs.
842 */
843 rc = pcim_enable_device(pdev);
844 if (rc)
845 return rc;
846
847 if (pci_resource_flags(pdev, MMIO_BAR_PCI) & IORESOURCE_MEM)
848 mmio_bar = MMIO_BAR_PCI;
849 else
850 mmio_bar = MMIO_BAR_CARDBUS;
851
852 rc = pcim_iomap_regions(pdev, 1 << mmio_bar, DRV_NAME);
853 if (rc)
854 return rc;
855 host->iomap = iomap = pcim_iomap_table(pdev);
856 hpriv->mmio_base = iomap[mmio_bar];
857 hpriv->cached_hctl = readw(hpriv->mmio_base + HOST_CTL);
858
859 for (i = 0; i < NR_PORTS; i++) {
860 struct ata_port *ap = host->ports[i];
861
862 ata_port_pbar_desc(ap, mmio_bar, -1, "mmio");
863 ata_port_pbar_desc(ap, mmio_bar, i * PORT_SIZE, "port");
864 }
865
866 /* Set dma_mask. This devices doesn't support 64bit addressing. */
867 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
868 if (rc) {
869 dev_err(&pdev->dev, "32-bit DMA enable failed\n");
870 return rc;
871 }
872
873 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
874 if (rc) {
875 dev_err(&pdev->dev, "failed to initialize controller\n");
876 return rc;
877 }
878
879 pci_set_master(pdev);
880 return ata_host_activate(host, pdev->irq, inic_interrupt, IRQF_SHARED,
881 &inic_sht);
882 }
883
884 static const struct pci_device_id inic_pci_tbl[] = {
885 { PCI_VDEVICE(INIT, 0x1622), },
886 { },
887 };
888
889 static struct pci_driver inic_pci_driver = {
890 .name = DRV_NAME,
891 .id_table = inic_pci_tbl,
892 #ifdef CONFIG_PM_SLEEP
893 .suspend = ata_pci_device_suspend,
894 .resume = inic_pci_device_resume,
895 #endif
896 .probe = inic_init_one,
897 .remove = ata_pci_remove_one,
898 };
899
900 module_pci_driver(inic_pci_driver);
901
902 MODULE_AUTHOR("Tejun Heo");
903 MODULE_DESCRIPTION("low-level driver for Initio 162x SATA");
904 MODULE_LICENSE("GPL v2");
905 MODULE_DEVICE_TABLE(pci, inic_pci_tbl);
906 MODULE_VERSION(DRV_VERSION);
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