1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  sata_sil.c - Silicon Image SATA
  4 *
  5 *  Maintained by:  Tejun Heo <tj@kernel.org>
  6 *  		    Please ALWAYS copy linux-ide@vger.kernel.org
  7 *		    on emails.
  8 *
  9 *  Copyright 2003-2005 Red Hat, Inc.
 10 *  Copyright 2003 Benjamin Herrenschmidt
 11 *
 12 *  libata documentation is available via 'make {ps|pdf}docs',
 13 *  as Documentation/driver-api/libata.rst
 14 *
 15 *  Documentation for SiI 3112:
 16 *  http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
 17 *
 18 *  Other errata and documentation available under NDA.
 19 */
 20
 21#include <linux/kernel.h>
 22#include <linux/module.h>
 23#include <linux/pci.h>
 24#include <linux/blkdev.h>
 25#include <linux/delay.h>
 26#include <linux/interrupt.h>
 27#include <linux/device.h>
 28#include <scsi/scsi_host.h>
 29#include <linux/libata.h>
 30#include <linux/dmi.h>
 31
 32#define DRV_NAME	"sata_sil"
 33#define DRV_VERSION	"2.4"
 34
 35#define SIL_DMA_BOUNDARY	0x7fffffffUL
 36
 37enum {
 38	SIL_MMIO_BAR		= 5,
 39
 40	/*
 41	 * host flags
 42	 */
 43	SIL_FLAG_NO_SATA_IRQ	= (1 << 28),
 44	SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
 45	SIL_FLAG_MOD15WRITE	= (1 << 30),
 46
 47	SIL_DFL_PORT_FLAGS	= ATA_FLAG_SATA,
 48
 49	/*
 50	 * Controller IDs
 51	 */
 52	sil_3112		= 0,
 53	sil_3112_no_sata_irq	= 1,
 54	sil_3512		= 2,
 55	sil_3114		= 3,
 56
 57	/*
 58	 * Register offsets
 59	 */
 60	SIL_SYSCFG		= 0x48,
 61
 62	/*
 63	 * Register bits
 64	 */
 65	/* SYSCFG */
 66	SIL_MASK_IDE0_INT	= (1 << 22),
 67	SIL_MASK_IDE1_INT	= (1 << 23),
 68	SIL_MASK_IDE2_INT	= (1 << 24),
 69	SIL_MASK_IDE3_INT	= (1 << 25),
 70	SIL_MASK_2PORT		= SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
 71	SIL_MASK_4PORT		= SIL_MASK_2PORT |
 72				  SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
 73
 74	/* BMDMA/BMDMA2 */
 75	SIL_INTR_STEERING	= (1 << 1),
 76
 77	SIL_DMA_ENABLE		= (1 << 0),  /* DMA run switch */
 78	SIL_DMA_RDWR		= (1 << 3),  /* DMA Rd-Wr */
 79	SIL_DMA_SATA_IRQ	= (1 << 4),  /* OR of all SATA IRQs */
 80	SIL_DMA_ACTIVE		= (1 << 16), /* DMA running */
 81	SIL_DMA_ERROR		= (1 << 17), /* PCI bus error */
 82	SIL_DMA_COMPLETE	= (1 << 18), /* cmd complete / IRQ pending */
 83	SIL_DMA_N_SATA_IRQ	= (1 << 6),  /* SATA_IRQ for the next channel */
 84	SIL_DMA_N_ACTIVE	= (1 << 24), /* ACTIVE for the next channel */
 85	SIL_DMA_N_ERROR		= (1 << 25), /* ERROR for the next channel */
 86	SIL_DMA_N_COMPLETE	= (1 << 26), /* COMPLETE for the next channel */
 87
 88	/* SIEN */
 89	SIL_SIEN_N		= (1 << 16), /* triggered by SError.N */
 90
 91	/*
 92	 * Others
 93	 */
 94	SIL_QUIRK_MOD15WRITE	= (1 << 0),
 95	SIL_QUIRK_UDMA5MAX	= (1 << 1),
 96};
 97
 98static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 99#ifdef CONFIG_PM_SLEEP
100static int sil_pci_device_resume(struct pci_dev *pdev);
101#endif
102static void sil_dev_config(struct ata_device *dev);
103static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
104static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
105static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
106static enum ata_completion_errors sil_qc_prep(struct ata_queued_cmd *qc);
107static void sil_bmdma_setup(struct ata_queued_cmd *qc);
108static void sil_bmdma_start(struct ata_queued_cmd *qc);
109static void sil_bmdma_stop(struct ata_queued_cmd *qc);
110static void sil_freeze(struct ata_port *ap);
111static void sil_thaw(struct ata_port *ap);
112
113
114static const struct pci_device_id sil_pci_tbl[] = {
115	{ PCI_VDEVICE(CMD, 0x3112), sil_3112 },
116	{ PCI_VDEVICE(CMD, 0x0240), sil_3112 },
117	{ PCI_VDEVICE(CMD, 0x3512), sil_3512 },
118	{ PCI_VDEVICE(CMD, 0x3114), sil_3114 },
119	{ PCI_VDEVICE(ATI, 0x436e), sil_3112 },
120	{ PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
121	{ PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
122
123	{ }	/* terminate list */
124};
125
126
127/* TODO firmware versions should be added - eric */
128static const struct sil_drivelist {
129	const char *product;
130	unsigned int quirk;
131} sil_blacklist [] = {
132	{ "ST320012AS",		SIL_QUIRK_MOD15WRITE },
133	{ "ST330013AS",		SIL_QUIRK_MOD15WRITE },
134	{ "ST340017AS",		SIL_QUIRK_MOD15WRITE },
135	{ "ST360015AS",		SIL_QUIRK_MOD15WRITE },
136	{ "ST380023AS",		SIL_QUIRK_MOD15WRITE },
137	{ "ST3120023AS",	SIL_QUIRK_MOD15WRITE },
138	{ "ST340014ASL",	SIL_QUIRK_MOD15WRITE },
139	{ "ST360014ASL",	SIL_QUIRK_MOD15WRITE },
140	{ "ST380011ASL",	SIL_QUIRK_MOD15WRITE },
141	{ "ST3120022ASL",	SIL_QUIRK_MOD15WRITE },
142	{ "ST3160021ASL",	SIL_QUIRK_MOD15WRITE },
143	{ "TOSHIBA MK2561GSYN",	SIL_QUIRK_MOD15WRITE },
144	{ "Maxtor 4D060H3",	SIL_QUIRK_UDMA5MAX },
145	{ }
146};
147
148static struct pci_driver sil_pci_driver = {
149	.name			= DRV_NAME,
150	.id_table		= sil_pci_tbl,
151	.probe			= sil_init_one,
152	.remove			= ata_pci_remove_one,
153#ifdef CONFIG_PM_SLEEP
154	.suspend		= ata_pci_device_suspend,
155	.resume			= sil_pci_device_resume,
156#endif
157};
158
159static const struct scsi_host_template sil_sht = {
160	ATA_BASE_SHT(DRV_NAME),
161	/** These controllers support Large Block Transfer which allows
162	    transfer chunks up to 2GB and which cross 64KB boundaries,
163	    therefore the DMA limits are more relaxed than standard ATA SFF. */
164	.dma_boundary		= SIL_DMA_BOUNDARY,
165	.sg_tablesize		= ATA_MAX_PRD
166};
167
168static struct ata_port_operations sil_ops = {
169	.inherits		= &ata_bmdma32_port_ops,
170	.dev_config		= sil_dev_config,
171	.set_mode		= sil_set_mode,
172	.bmdma_setup            = sil_bmdma_setup,
173	.bmdma_start            = sil_bmdma_start,
174	.bmdma_stop		= sil_bmdma_stop,
175	.qc_prep		= sil_qc_prep,
176	.freeze			= sil_freeze,
177	.thaw			= sil_thaw,
178	.scr_read		= sil_scr_read,
179	.scr_write		= sil_scr_write,
180};
181
182static const struct ata_port_info sil_port_info[] = {
183	/* sil_3112 */
184	{
185		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
186		.pio_mask	= ATA_PIO4,
187		.mwdma_mask	= ATA_MWDMA2,
188		.udma_mask	= ATA_UDMA5,
189		.port_ops	= &sil_ops,
190	},
191	/* sil_3112_no_sata_irq */
192	{
193		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
194				  SIL_FLAG_NO_SATA_IRQ,
195		.pio_mask	= ATA_PIO4,
196		.mwdma_mask	= ATA_MWDMA2,
197		.udma_mask	= ATA_UDMA5,
198		.port_ops	= &sil_ops,
199	},
200	/* sil_3512 */
201	{
202		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
203		.pio_mask	= ATA_PIO4,
204		.mwdma_mask	= ATA_MWDMA2,
205		.udma_mask	= ATA_UDMA5,
206		.port_ops	= &sil_ops,
207	},
208	/* sil_3114 */
209	{
210		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
211		.pio_mask	= ATA_PIO4,
212		.mwdma_mask	= ATA_MWDMA2,
213		.udma_mask	= ATA_UDMA5,
214		.port_ops	= &sil_ops,
215	},
216};
217
218/* per-port register offsets */
219/* TODO: we can probably calculate rather than use a table */
220static const struct {
221	unsigned long tf;	/* ATA taskfile register block */
222	unsigned long ctl;	/* ATA control/altstatus register block */
223	unsigned long bmdma;	/* DMA register block */
224	unsigned long bmdma2;	/* DMA register block #2 */
225	unsigned long fifo_cfg;	/* FIFO Valid Byte Count and Control */
226	unsigned long scr;	/* SATA control register block */
227	unsigned long sien;	/* SATA Interrupt Enable register */
228	unsigned long xfer_mode;/* data transfer mode register */
229	unsigned long sfis_cfg;	/* SATA FIS reception config register */
230} sil_port[] = {
231	/* port 0 ... */
232	/*   tf    ctl  bmdma  bmdma2  fifo    scr   sien   mode   sfis */
233	{  0x80,  0x8A,   0x0,  0x10,  0x40, 0x100, 0x148,  0xb4, 0x14c },
234	{  0xC0,  0xCA,   0x8,  0x18,  0x44, 0x180, 0x1c8,  0xf4, 0x1cc },
235	{ 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
236	{ 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
237	/* ... port 3 */
238};
239
240MODULE_AUTHOR("Jeff Garzik");
241MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
242MODULE_LICENSE("GPL");
243MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
244MODULE_VERSION(DRV_VERSION);
245
246static int slow_down;
247module_param(slow_down, int, 0444);
248MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
249
250
251static void sil_bmdma_stop(struct ata_queued_cmd *qc)
252{
253	struct ata_port *ap = qc->ap;
254	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
255	void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
256
257	/* clear start/stop bit - can safely always write 0 */
258	iowrite8(0, bmdma2);
259
260	/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
261	ata_sff_dma_pause(ap);
262}
263
264static void sil_bmdma_setup(struct ata_queued_cmd *qc)
265{
266	struct ata_port *ap = qc->ap;
267	void __iomem *bmdma = ap->ioaddr.bmdma_addr;
268
269	/* load PRD table addr. */
270	iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
271
272	/* issue r/w command */
273	ap->ops->sff_exec_command(ap, &qc->tf);
274}
275
276static void sil_bmdma_start(struct ata_queued_cmd *qc)
277{
278	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
279	struct ata_port *ap = qc->ap;
280	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
281	void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
282	u8 dmactl = ATA_DMA_START;
283
284	/* set transfer direction, start host DMA transaction
285	   Note: For Large Block Transfer to work, the DMA must be started
286	   using the bmdma2 register. */
287	if (!rw)
288		dmactl |= ATA_DMA_WR;
289	iowrite8(dmactl, bmdma2);
290}
291
292/* The way God intended PCI IDE scatter/gather lists to look and behave... */
293static void sil_fill_sg(struct ata_queued_cmd *qc)
294{
295	struct scatterlist *sg;
296	struct ata_port *ap = qc->ap;
297	struct ata_bmdma_prd *prd, *last_prd = NULL;
298	unsigned int si;
299
300	prd = &ap->bmdma_prd[0];
301	for_each_sg(qc->sg, sg, qc->n_elem, si) {
302		/* Note h/w doesn't support 64-bit, so we unconditionally
303		 * truncate dma_addr_t to u32.
304		 */
305		u32 addr = (u32) sg_dma_address(sg);
306		u32 sg_len = sg_dma_len(sg);
307
308		prd->addr = cpu_to_le32(addr);
309		prd->flags_len = cpu_to_le32(sg_len);
310
311		last_prd = prd;
312		prd++;
313	}
314
315	if (likely(last_prd))
316		last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
317}
318
319static enum ata_completion_errors sil_qc_prep(struct ata_queued_cmd *qc)
320{
321	if (!(qc->flags & ATA_QCFLAG_DMAMAP))
322		return AC_ERR_OK;
323
324	sil_fill_sg(qc);
325
326	return AC_ERR_OK;
327}
328
329static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
330{
331	u8 cache_line = 0;
332	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
333	return cache_line;
334}
335
336/**
337 *	sil_set_mode		-	wrap set_mode functions
338 *	@link: link to set up
339 *	@r_failed: returned device when we fail
340 *
341 *	Wrap the libata method for device setup as after the setup we need
342 *	to inspect the results and do some configuration work
343 */
344
345static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
346{
347	struct ata_port *ap = link->ap;
348	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
349	void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
350	struct ata_device *dev;
351	u32 tmp, dev_mode[2] = { };
352	int rc;
353
354	rc = ata_do_set_mode(link, r_failed);
355	if (rc)
356		return rc;
357
358	ata_for_each_dev(dev, link, ALL) {
359		if (!ata_dev_enabled(dev))
360			dev_mode[dev->devno] = 0;	/* PIO0/1/2 */
361		else if (dev->flags & ATA_DFLAG_PIO)
362			dev_mode[dev->devno] = 1;	/* PIO3/4 */
363		else
364			dev_mode[dev->devno] = 3;	/* UDMA */
365		/* value 2 indicates MDMA */
366	}
367
368	tmp = readl(addr);
369	tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
370	tmp |= dev_mode[0];
371	tmp |= (dev_mode[1] << 4);
372	writel(tmp, addr);
373	readl(addr);	/* flush */
374	return 0;
375}
376
377static inline void __iomem *sil_scr_addr(struct ata_port *ap,
378					 unsigned int sc_reg)
379{
380	void __iomem *offset = ap->ioaddr.scr_addr;
381
382	switch (sc_reg) {
383	case SCR_STATUS:
384		return offset + 4;
385	case SCR_ERROR:
386		return offset + 8;
387	case SCR_CONTROL:
388		return offset;
389	default:
390		/* do nothing */
391		break;
392	}
393
394	return NULL;
395}
396
397static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
398{
399	void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
400
401	if (mmio) {
402		*val = readl(mmio);
403		return 0;
404	}
405	return -EINVAL;
406}
407
408static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
409{
410	void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
411
412	if (mmio) {
413		writel(val, mmio);
414		return 0;
415	}
416	return -EINVAL;
417}
418
419static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
420{
421	struct ata_eh_info *ehi = &ap->link.eh_info;
422	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
423	u8 status;
424
425	if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
426		u32 serror = 0xffffffff;
427
428		/* SIEN doesn't mask SATA IRQs on some 3112s.  Those
429		 * controllers continue to assert IRQ as long as
430		 * SError bits are pending.  Clear SError immediately.
431		 */
432		sil_scr_read(&ap->link, SCR_ERROR, &serror);
433		sil_scr_write(&ap->link, SCR_ERROR, serror);
434
435		/* Sometimes spurious interrupts occur, double check
436		 * it's PHYRDY CHG.
437		 */
438		if (serror & SERR_PHYRDY_CHG) {
439			ap->link.eh_info.serror |= serror;
440			goto freeze;
441		}
442
443		if (!(bmdma2 & SIL_DMA_COMPLETE))
444			return;
445	}
446
447	if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
448		/* this sometimes happens, just clear IRQ */
449		ap->ops->sff_check_status(ap);
450		return;
451	}
452
453	/* Check whether we are expecting interrupt in this state */
454	switch (ap->hsm_task_state) {
455	case HSM_ST_FIRST:
456		/* Some pre-ATAPI-4 devices assert INTRQ
457		 * at this state when ready to receive CDB.
458		 */
459
460		/* Check the ATA_DFLAG_CDB_INTR flag is enough here.
461		 * The flag was turned on only for atapi devices.  No
462		 * need to check ata_is_atapi(qc->tf.protocol) again.
463		 */
464		if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
465			goto err_hsm;
466		break;
467	case HSM_ST_LAST:
468		if (ata_is_dma(qc->tf.protocol)) {
469			/* clear DMA-Start bit */
470			ap->ops->bmdma_stop(qc);
471
472			if (bmdma2 & SIL_DMA_ERROR) {
473				qc->err_mask |= AC_ERR_HOST_BUS;
474				ap->hsm_task_state = HSM_ST_ERR;
475			}
476		}
477		break;
478	case HSM_ST:
479		break;
480	default:
481		goto err_hsm;
482	}
483
484	/* check main status, clearing INTRQ */
485	status = ap->ops->sff_check_status(ap);
486	if (unlikely(status & ATA_BUSY))
487		goto err_hsm;
488
489	/* ack bmdma irq events */
490	ata_bmdma_irq_clear(ap);
491
492	/* kick HSM in the ass */
493	ata_sff_hsm_move(ap, qc, status, 0);
494
495	if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
496		ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
497
498	return;
499
500 err_hsm:
501	qc->err_mask |= AC_ERR_HSM;
502 freeze:
503	ata_port_freeze(ap);
504}
505
506static irqreturn_t sil_interrupt(int irq, void *dev_instance)
507{
508	struct ata_host *host = dev_instance;
509	void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
510	int handled = 0;
511	int i;
512
513	spin_lock(&host->lock);
514
515	for (i = 0; i < host->n_ports; i++) {
516		struct ata_port *ap = host->ports[i];
517		u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
518
519		/* turn off SATA_IRQ if not supported */
520		if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
521			bmdma2 &= ~SIL_DMA_SATA_IRQ;
522
523		if (bmdma2 == 0xffffffff ||
524		    !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
525			continue;
526
527		sil_host_intr(ap, bmdma2);
528		handled = 1;
529	}
530
531	spin_unlock(&host->lock);
532
533	return IRQ_RETVAL(handled);
534}
535
536static void sil_freeze(struct ata_port *ap)
537{
538	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
539	u32 tmp;
540
541	/* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
542	writel(0, mmio_base + sil_port[ap->port_no].sien);
543
544	/* plug IRQ */
545	tmp = readl(mmio_base + SIL_SYSCFG);
546	tmp |= SIL_MASK_IDE0_INT << ap->port_no;
547	writel(tmp, mmio_base + SIL_SYSCFG);
548	readl(mmio_base + SIL_SYSCFG);	/* flush */
549
550	/* Ensure DMA_ENABLE is off.
551	 *
552	 * This is because the controller will not give us access to the
553	 * taskfile registers while a DMA is in progress
554	 */
555	iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
556		 ap->ioaddr.bmdma_addr);
557
558	/* According to ata_bmdma_stop, an HDMA transition requires
559	 * on PIO cycle. But we can't read a taskfile register.
560	 */
561	ioread8(ap->ioaddr.bmdma_addr);
562}
563
564static void sil_thaw(struct ata_port *ap)
565{
566	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
567	u32 tmp;
568
569	/* clear IRQ */
570	ap->ops->sff_check_status(ap);
571	ata_bmdma_irq_clear(ap);
572
573	/* turn on SATA IRQ if supported */
574	if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
575		writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
576
577	/* turn on IRQ */
578	tmp = readl(mmio_base + SIL_SYSCFG);
579	tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
580	writel(tmp, mmio_base + SIL_SYSCFG);
581}
582
583/**
584 *	sil_dev_config - Apply device/host-specific errata fixups
585 *	@dev: Device to be examined
586 *
587 *	After the IDENTIFY [PACKET] DEVICE step is complete, and a
588 *	device is known to be present, this function is called.
589 *	We apply two errata fixups which are specific to Silicon Image,
590 *	a Seagate and a Maxtor fixup.
591 *
592 *	For certain Seagate devices, we must limit the maximum sectors
593 *	to under 8K.
594 *
595 *	For certain Maxtor devices, we must not program the drive
596 *	beyond udma5.
597 *
598 *	Both fixups are unfairly pessimistic.  As soon as I get more
599 *	information on these errata, I will create a more exhaustive
600 *	list, and apply the fixups to only the specific
601 *	devices/hosts/firmwares that need it.
602 *
603 *	20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
604 *	The Maxtor quirk is in the blacklist, but I'm keeping the original
605 *	pessimistic fix for the following reasons...
606 *	- There seems to be less info on it, only one device gleaned off the
607 *	Windows	driver, maybe only one is affected.  More info would be greatly
608 *	appreciated.
609 *	- But then again UDMA5 is hardly anything to complain about
610 */
611static void sil_dev_config(struct ata_device *dev)
612{
613	struct ata_port *ap = dev->link->ap;
614	int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
615	unsigned int n, quirks = 0;
616	unsigned char model_num[ATA_ID_PROD_LEN + 1];
617
618	/* This controller doesn't support trim */
619	dev->horkage |= ATA_HORKAGE_NOTRIM;
620
621	ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
622
623	for (n = 0; sil_blacklist[n].product; n++)
624		if (!strcmp(sil_blacklist[n].product, model_num)) {
625			quirks = sil_blacklist[n].quirk;
626			break;
627		}
628
629	/* limit requests to 15 sectors */
630	if (slow_down ||
631	    ((ap->flags & SIL_FLAG_MOD15WRITE) &&
632	     (quirks & SIL_QUIRK_MOD15WRITE))) {
633		if (print_info)
634			ata_dev_info(dev,
635		"applying Seagate errata fix (mod15write workaround)\n");
636		dev->max_sectors = 15;
637		return;
638	}
639
640	/* limit to udma5 */
641	if (quirks & SIL_QUIRK_UDMA5MAX) {
642		if (print_info)
643			ata_dev_info(dev, "applying Maxtor errata fix %s\n",
644				     model_num);
645		dev->udma_mask &= ATA_UDMA5;
646		return;
647	}
648}
649
650static void sil_init_controller(struct ata_host *host)
651{
652	struct pci_dev *pdev = to_pci_dev(host->dev);
653	void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
654	u8 cls;
655	u32 tmp;
656	int i;
657
658	/* Initialize FIFO PCI bus arbitration */
659	cls = sil_get_device_cache_line(pdev);
660	if (cls) {
661		cls >>= 3;
662		cls++;  /* cls = (line_size/8)+1 */
663		for (i = 0; i < host->n_ports; i++)
664			writew(cls << 8 | cls,
665			       mmio_base + sil_port[i].fifo_cfg);
666	} else
667		dev_warn(&pdev->dev,
668			 "cache line size not set.  Driver may not function\n");
669
670	/* Apply R_ERR on DMA activate FIS errata workaround */
671	if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
672		int cnt;
673
674		for (i = 0, cnt = 0; i < host->n_ports; i++) {
675			tmp = readl(mmio_base + sil_port[i].sfis_cfg);
676			if ((tmp & 0x3) != 0x01)
677				continue;
678			if (!cnt)
679				dev_info(&pdev->dev,
680					 "Applying R_ERR on DMA activate FIS errata fix\n");
681			writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
682			cnt++;
683		}
684	}
685
686	if (host->n_ports == 4) {
687		/* flip the magic "make 4 ports work" bit */
688		tmp = readl(mmio_base + sil_port[2].bmdma);
689		if ((tmp & SIL_INTR_STEERING) == 0)
690			writel(tmp | SIL_INTR_STEERING,
691			       mmio_base + sil_port[2].bmdma);
692	}
693}
694
695static bool sil_broken_system_poweroff(struct pci_dev *pdev)
696{
697	static const struct dmi_system_id broken_systems[] = {
698		{
699			.ident = "HP Compaq nx6325",
700			.matches = {
701				DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
702				DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
703			},
704			/* PCI slot number of the controller */
705			.driver_data = (void *)0x12UL,
706		},
707
708		{ }	/* terminate list */
709	};
710	const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
711
712	if (dmi) {
713		unsigned long slot = (unsigned long)dmi->driver_data;
714		/* apply the quirk only to on-board controllers */
715		return slot == PCI_SLOT(pdev->devfn);
716	}
717
718	return false;
719}
720
721static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
722{
723	int board_id = ent->driver_data;
724	struct ata_port_info pi = sil_port_info[board_id];
725	const struct ata_port_info *ppi[] = { &pi, NULL };
726	struct ata_host *host;
727	void __iomem *mmio_base;
728	int n_ports, rc;
729	unsigned int i;
730
731	ata_print_version_once(&pdev->dev, DRV_VERSION);
732
733	/* allocate host */
734	n_ports = 2;
735	if (board_id == sil_3114)
736		n_ports = 4;
737
738	if (sil_broken_system_poweroff(pdev)) {
739		pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
740					ATA_FLAG_NO_HIBERNATE_SPINDOWN;
741		dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
742				"on poweroff and hibernation\n");
743	}
744
745	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
746	if (!host)
747		return -ENOMEM;
748
749	/* acquire resources and fill host */
750	rc = pcim_enable_device(pdev);
751	if (rc)
752		return rc;
753
754	rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
755	if (rc == -EBUSY)
756		pcim_pin_device(pdev);
757	if (rc)
758		return rc;
759	host->iomap = pcim_iomap_table(pdev);
760
761	rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
762	if (rc)
763		return rc;
764
765	mmio_base = host->iomap[SIL_MMIO_BAR];
766
767	for (i = 0; i < host->n_ports; i++) {
768		struct ata_port *ap = host->ports[i];
769		struct ata_ioports *ioaddr = &ap->ioaddr;
770
771		ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
772		ioaddr->altstatus_addr =
773		ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
774		ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
775		ioaddr->scr_addr = mmio_base + sil_port[i].scr;
776		ata_sff_std_ports(ioaddr);
777
778		ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
779		ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
780	}
781
782	/* initialize and activate */
783	sil_init_controller(host);
784
785	pci_set_master(pdev);
786	return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
787				 &sil_sht);
788}
789
790#ifdef CONFIG_PM_SLEEP
791static int sil_pci_device_resume(struct pci_dev *pdev)
792{
793	struct ata_host *host = pci_get_drvdata(pdev);
794	int rc;
795
796	rc = ata_pci_device_do_resume(pdev);
797	if (rc)
798		return rc;
799
800	sil_init_controller(host);
801	ata_host_resume(host);
802
803	return 0;
804}
805#endif
806
807module_pci_driver(sil_pci_driver);