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Linux/drivers/ata/sata_sil.c

  1 /*
  2  *  sata_sil.c - Silicon Image SATA
  3  *
  4  *  Maintained by:  Tejun Heo <tj@kernel.org>
  5  *                  Please ALWAYS copy linux-ide@vger.kernel.org
  6  *                  on emails.
  7  *
  8  *  Copyright 2003-2005 Red Hat, Inc.
  9  *  Copyright 2003 Benjamin Herrenschmidt
 10  *
 11  *
 12  *  This program is free software; you can redistribute it and/or modify
 13  *  it under the terms of the GNU General Public License as published by
 14  *  the Free Software Foundation; either version 2, or (at your option)
 15  *  any later version.
 16  *
 17  *  This program is distributed in the hope that it will be useful,
 18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 20  *  GNU General Public License for more details.
 21  *
 22  *  You should have received a copy of the GNU General Public License
 23  *  along with this program; see the file COPYING.  If not, write to
 24  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 25  *
 26  *
 27  *  libata documentation is available via 'make {ps|pdf}docs',
 28  *  as Documentation/DocBook/libata.*
 29  *
 30  *  Documentation for SiI 3112:
 31  *  http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
 32  *
 33  *  Other errata and documentation available under NDA.
 34  *
 35  */
 36 
 37 #include <linux/kernel.h>
 38 #include <linux/module.h>
 39 #include <linux/pci.h>
 40 #include <linux/blkdev.h>
 41 #include <linux/delay.h>
 42 #include <linux/interrupt.h>
 43 #include <linux/device.h>
 44 #include <scsi/scsi_host.h>
 45 #include <linux/libata.h>
 46 #include <linux/dmi.h>
 47 
 48 #define DRV_NAME        "sata_sil"
 49 #define DRV_VERSION     "2.4"
 50 
 51 #define SIL_DMA_BOUNDARY        0x7fffffffUL
 52 
 53 enum {
 54         SIL_MMIO_BAR            = 5,
 55 
 56         /*
 57          * host flags
 58          */
 59         SIL_FLAG_NO_SATA_IRQ    = (1 << 28),
 60         SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
 61         SIL_FLAG_MOD15WRITE     = (1 << 30),
 62 
 63         SIL_DFL_PORT_FLAGS      = ATA_FLAG_SATA,
 64 
 65         /*
 66          * Controller IDs
 67          */
 68         sil_3112                = 0,
 69         sil_3112_no_sata_irq    = 1,
 70         sil_3512                = 2,
 71         sil_3114                = 3,
 72 
 73         /*
 74          * Register offsets
 75          */
 76         SIL_SYSCFG              = 0x48,
 77 
 78         /*
 79          * Register bits
 80          */
 81         /* SYSCFG */
 82         SIL_MASK_IDE0_INT       = (1 << 22),
 83         SIL_MASK_IDE1_INT       = (1 << 23),
 84         SIL_MASK_IDE2_INT       = (1 << 24),
 85         SIL_MASK_IDE3_INT       = (1 << 25),
 86         SIL_MASK_2PORT          = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
 87         SIL_MASK_4PORT          = SIL_MASK_2PORT |
 88                                   SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
 89 
 90         /* BMDMA/BMDMA2 */
 91         SIL_INTR_STEERING       = (1 << 1),
 92 
 93         SIL_DMA_ENABLE          = (1 << 0),  /* DMA run switch */
 94         SIL_DMA_RDWR            = (1 << 3),  /* DMA Rd-Wr */
 95         SIL_DMA_SATA_IRQ        = (1 << 4),  /* OR of all SATA IRQs */
 96         SIL_DMA_ACTIVE          = (1 << 16), /* DMA running */
 97         SIL_DMA_ERROR           = (1 << 17), /* PCI bus error */
 98         SIL_DMA_COMPLETE        = (1 << 18), /* cmd complete / IRQ pending */
 99         SIL_DMA_N_SATA_IRQ      = (1 << 6),  /* SATA_IRQ for the next channel */
100         SIL_DMA_N_ACTIVE        = (1 << 24), /* ACTIVE for the next channel */
101         SIL_DMA_N_ERROR         = (1 << 25), /* ERROR for the next channel */
102         SIL_DMA_N_COMPLETE      = (1 << 26), /* COMPLETE for the next channel */
103 
104         /* SIEN */
105         SIL_SIEN_N              = (1 << 16), /* triggered by SError.N */
106 
107         /*
108          * Others
109          */
110         SIL_QUIRK_MOD15WRITE    = (1 << 0),
111         SIL_QUIRK_UDMA5MAX      = (1 << 1),
112 };
113 
114 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
115 #ifdef CONFIG_PM_SLEEP
116 static int sil_pci_device_resume(struct pci_dev *pdev);
117 #endif
118 static void sil_dev_config(struct ata_device *dev);
119 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
120 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
121 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
122 static void sil_qc_prep(struct ata_queued_cmd *qc);
123 static void sil_bmdma_setup(struct ata_queued_cmd *qc);
124 static void sil_bmdma_start(struct ata_queued_cmd *qc);
125 static void sil_bmdma_stop(struct ata_queued_cmd *qc);
126 static void sil_freeze(struct ata_port *ap);
127 static void sil_thaw(struct ata_port *ap);
128 
129 
130 static const struct pci_device_id sil_pci_tbl[] = {
131         { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
132         { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
133         { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
134         { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
135         { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
136         { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
137         { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
138 
139         { }     /* terminate list */
140 };
141 
142 
143 /* TODO firmware versions should be added - eric */
144 static const struct sil_drivelist {
145         const char *product;
146         unsigned int quirk;
147 } sil_blacklist [] = {
148         { "ST320012AS",         SIL_QUIRK_MOD15WRITE },
149         { "ST330013AS",         SIL_QUIRK_MOD15WRITE },
150         { "ST340017AS",         SIL_QUIRK_MOD15WRITE },
151         { "ST360015AS",         SIL_QUIRK_MOD15WRITE },
152         { "ST380023AS",         SIL_QUIRK_MOD15WRITE },
153         { "ST3120023AS",        SIL_QUIRK_MOD15WRITE },
154         { "ST340014ASL",        SIL_QUIRK_MOD15WRITE },
155         { "ST360014ASL",        SIL_QUIRK_MOD15WRITE },
156         { "ST380011ASL",        SIL_QUIRK_MOD15WRITE },
157         { "ST3120022ASL",       SIL_QUIRK_MOD15WRITE },
158         { "ST3160021ASL",       SIL_QUIRK_MOD15WRITE },
159         { "TOSHIBA MK2561GSYN", SIL_QUIRK_MOD15WRITE },
160         { "Maxtor 4D060H3",     SIL_QUIRK_UDMA5MAX },
161         { }
162 };
163 
164 static struct pci_driver sil_pci_driver = {
165         .name                   = DRV_NAME,
166         .id_table               = sil_pci_tbl,
167         .probe                  = sil_init_one,
168         .remove                 = ata_pci_remove_one,
169 #ifdef CONFIG_PM_SLEEP
170         .suspend                = ata_pci_device_suspend,
171         .resume                 = sil_pci_device_resume,
172 #endif
173 };
174 
175 static struct scsi_host_template sil_sht = {
176         ATA_BASE_SHT(DRV_NAME),
177         /** These controllers support Large Block Transfer which allows
178             transfer chunks up to 2GB and which cross 64KB boundaries,
179             therefore the DMA limits are more relaxed than standard ATA SFF. */
180         .dma_boundary           = SIL_DMA_BOUNDARY,
181         .sg_tablesize           = ATA_MAX_PRD
182 };
183 
184 static struct ata_port_operations sil_ops = {
185         .inherits               = &ata_bmdma32_port_ops,
186         .dev_config             = sil_dev_config,
187         .set_mode               = sil_set_mode,
188         .bmdma_setup            = sil_bmdma_setup,
189         .bmdma_start            = sil_bmdma_start,
190         .bmdma_stop             = sil_bmdma_stop,
191         .qc_prep                = sil_qc_prep,
192         .freeze                 = sil_freeze,
193         .thaw                   = sil_thaw,
194         .scr_read               = sil_scr_read,
195         .scr_write              = sil_scr_write,
196 };
197 
198 static const struct ata_port_info sil_port_info[] = {
199         /* sil_3112 */
200         {
201                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
202                 .pio_mask       = ATA_PIO4,
203                 .mwdma_mask     = ATA_MWDMA2,
204                 .udma_mask      = ATA_UDMA5,
205                 .port_ops       = &sil_ops,
206         },
207         /* sil_3112_no_sata_irq */
208         {
209                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
210                                   SIL_FLAG_NO_SATA_IRQ,
211                 .pio_mask       = ATA_PIO4,
212                 .mwdma_mask     = ATA_MWDMA2,
213                 .udma_mask      = ATA_UDMA5,
214                 .port_ops       = &sil_ops,
215         },
216         /* sil_3512 */
217         {
218                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
219                 .pio_mask       = ATA_PIO4,
220                 .mwdma_mask     = ATA_MWDMA2,
221                 .udma_mask      = ATA_UDMA5,
222                 .port_ops       = &sil_ops,
223         },
224         /* sil_3114 */
225         {
226                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
227                 .pio_mask       = ATA_PIO4,
228                 .mwdma_mask     = ATA_MWDMA2,
229                 .udma_mask      = ATA_UDMA5,
230                 .port_ops       = &sil_ops,
231         },
232 };
233 
234 /* per-port register offsets */
235 /* TODO: we can probably calculate rather than use a table */
236 static const struct {
237         unsigned long tf;       /* ATA taskfile register block */
238         unsigned long ctl;      /* ATA control/altstatus register block */
239         unsigned long bmdma;    /* DMA register block */
240         unsigned long bmdma2;   /* DMA register block #2 */
241         unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
242         unsigned long scr;      /* SATA control register block */
243         unsigned long sien;     /* SATA Interrupt Enable register */
244         unsigned long xfer_mode;/* data transfer mode register */
245         unsigned long sfis_cfg; /* SATA FIS reception config register */
246 } sil_port[] = {
247         /* port 0 ... */
248         /*   tf    ctl  bmdma  bmdma2  fifo    scr   sien   mode   sfis */
249         {  0x80,  0x8A,   0x0,  0x10,  0x40, 0x100, 0x148,  0xb4, 0x14c },
250         {  0xC0,  0xCA,   0x8,  0x18,  0x44, 0x180, 0x1c8,  0xf4, 0x1cc },
251         { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
252         { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
253         /* ... port 3 */
254 };
255 
256 MODULE_AUTHOR("Jeff Garzik");
257 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
258 MODULE_LICENSE("GPL");
259 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
260 MODULE_VERSION(DRV_VERSION);
261 
262 static int slow_down;
263 module_param(slow_down, int, 0444);
264 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
265 
266 
267 static void sil_bmdma_stop(struct ata_queued_cmd *qc)
268 {
269         struct ata_port *ap = qc->ap;
270         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
271         void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
272 
273         /* clear start/stop bit - can safely always write 0 */
274         iowrite8(0, bmdma2);
275 
276         /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
277         ata_sff_dma_pause(ap);
278 }
279 
280 static void sil_bmdma_setup(struct ata_queued_cmd *qc)
281 {
282         struct ata_port *ap = qc->ap;
283         void __iomem *bmdma = ap->ioaddr.bmdma_addr;
284 
285         /* load PRD table addr. */
286         iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
287 
288         /* issue r/w command */
289         ap->ops->sff_exec_command(ap, &qc->tf);
290 }
291 
292 static void sil_bmdma_start(struct ata_queued_cmd *qc)
293 {
294         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
295         struct ata_port *ap = qc->ap;
296         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
297         void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
298         u8 dmactl = ATA_DMA_START;
299 
300         /* set transfer direction, start host DMA transaction
301            Note: For Large Block Transfer to work, the DMA must be started
302            using the bmdma2 register. */
303         if (!rw)
304                 dmactl |= ATA_DMA_WR;
305         iowrite8(dmactl, bmdma2);
306 }
307 
308 /* The way God intended PCI IDE scatter/gather lists to look and behave... */
309 static void sil_fill_sg(struct ata_queued_cmd *qc)
310 {
311         struct scatterlist *sg;
312         struct ata_port *ap = qc->ap;
313         struct ata_bmdma_prd *prd, *last_prd = NULL;
314         unsigned int si;
315 
316         prd = &ap->bmdma_prd[0];
317         for_each_sg(qc->sg, sg, qc->n_elem, si) {
318                 /* Note h/w doesn't support 64-bit, so we unconditionally
319                  * truncate dma_addr_t to u32.
320                  */
321                 u32 addr = (u32) sg_dma_address(sg);
322                 u32 sg_len = sg_dma_len(sg);
323 
324                 prd->addr = cpu_to_le32(addr);
325                 prd->flags_len = cpu_to_le32(sg_len);
326                 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
327 
328                 last_prd = prd;
329                 prd++;
330         }
331 
332         if (likely(last_prd))
333                 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
334 }
335 
336 static void sil_qc_prep(struct ata_queued_cmd *qc)
337 {
338         if (!(qc->flags & ATA_QCFLAG_DMAMAP))
339                 return;
340 
341         sil_fill_sg(qc);
342 }
343 
344 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
345 {
346         u8 cache_line = 0;
347         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
348         return cache_line;
349 }
350 
351 /**
352  *      sil_set_mode            -       wrap set_mode functions
353  *      @link: link to set up
354  *      @r_failed: returned device when we fail
355  *
356  *      Wrap the libata method for device setup as after the setup we need
357  *      to inspect the results and do some configuration work
358  */
359 
360 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
361 {
362         struct ata_port *ap = link->ap;
363         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
364         void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
365         struct ata_device *dev;
366         u32 tmp, dev_mode[2] = { };
367         int rc;
368 
369         rc = ata_do_set_mode(link, r_failed);
370         if (rc)
371                 return rc;
372 
373         ata_for_each_dev(dev, link, ALL) {
374                 if (!ata_dev_enabled(dev))
375                         dev_mode[dev->devno] = 0;       /* PIO0/1/2 */
376                 else if (dev->flags & ATA_DFLAG_PIO)
377                         dev_mode[dev->devno] = 1;       /* PIO3/4 */
378                 else
379                         dev_mode[dev->devno] = 3;       /* UDMA */
380                 /* value 2 indicates MDMA */
381         }
382 
383         tmp = readl(addr);
384         tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
385         tmp |= dev_mode[0];
386         tmp |= (dev_mode[1] << 4);
387         writel(tmp, addr);
388         readl(addr);    /* flush */
389         return 0;
390 }
391 
392 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
393                                          unsigned int sc_reg)
394 {
395         void __iomem *offset = ap->ioaddr.scr_addr;
396 
397         switch (sc_reg) {
398         case SCR_STATUS:
399                 return offset + 4;
400         case SCR_ERROR:
401                 return offset + 8;
402         case SCR_CONTROL:
403                 return offset;
404         default:
405                 /* do nothing */
406                 break;
407         }
408 
409         return NULL;
410 }
411 
412 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
413 {
414         void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
415 
416         if (mmio) {
417                 *val = readl(mmio);
418                 return 0;
419         }
420         return -EINVAL;
421 }
422 
423 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
424 {
425         void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
426 
427         if (mmio) {
428                 writel(val, mmio);
429                 return 0;
430         }
431         return -EINVAL;
432 }
433 
434 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
435 {
436         struct ata_eh_info *ehi = &ap->link.eh_info;
437         struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
438         u8 status;
439 
440         if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
441                 u32 serror = 0xffffffff;
442 
443                 /* SIEN doesn't mask SATA IRQs on some 3112s.  Those
444                  * controllers continue to assert IRQ as long as
445                  * SError bits are pending.  Clear SError immediately.
446                  */
447                 sil_scr_read(&ap->link, SCR_ERROR, &serror);
448                 sil_scr_write(&ap->link, SCR_ERROR, serror);
449 
450                 /* Sometimes spurious interrupts occur, double check
451                  * it's PHYRDY CHG.
452                  */
453                 if (serror & SERR_PHYRDY_CHG) {
454                         ap->link.eh_info.serror |= serror;
455                         goto freeze;
456                 }
457 
458                 if (!(bmdma2 & SIL_DMA_COMPLETE))
459                         return;
460         }
461 
462         if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
463                 /* this sometimes happens, just clear IRQ */
464                 ap->ops->sff_check_status(ap);
465                 return;
466         }
467 
468         /* Check whether we are expecting interrupt in this state */
469         switch (ap->hsm_task_state) {
470         case HSM_ST_FIRST:
471                 /* Some pre-ATAPI-4 devices assert INTRQ
472                  * at this state when ready to receive CDB.
473                  */
474 
475                 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
476                  * The flag was turned on only for atapi devices.  No
477                  * need to check ata_is_atapi(qc->tf.protocol) again.
478                  */
479                 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
480                         goto err_hsm;
481                 break;
482         case HSM_ST_LAST:
483                 if (ata_is_dma(qc->tf.protocol)) {
484                         /* clear DMA-Start bit */
485                         ap->ops->bmdma_stop(qc);
486 
487                         if (bmdma2 & SIL_DMA_ERROR) {
488                                 qc->err_mask |= AC_ERR_HOST_BUS;
489                                 ap->hsm_task_state = HSM_ST_ERR;
490                         }
491                 }
492                 break;
493         case HSM_ST:
494                 break;
495         default:
496                 goto err_hsm;
497         }
498 
499         /* check main status, clearing INTRQ */
500         status = ap->ops->sff_check_status(ap);
501         if (unlikely(status & ATA_BUSY))
502                 goto err_hsm;
503 
504         /* ack bmdma irq events */
505         ata_bmdma_irq_clear(ap);
506 
507         /* kick HSM in the ass */
508         ata_sff_hsm_move(ap, qc, status, 0);
509 
510         if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
511                 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
512 
513         return;
514 
515  err_hsm:
516         qc->err_mask |= AC_ERR_HSM;
517  freeze:
518         ata_port_freeze(ap);
519 }
520 
521 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
522 {
523         struct ata_host *host = dev_instance;
524         void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
525         int handled = 0;
526         int i;
527 
528         spin_lock(&host->lock);
529 
530         for (i = 0; i < host->n_ports; i++) {
531                 struct ata_port *ap = host->ports[i];
532                 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
533 
534                 /* turn off SATA_IRQ if not supported */
535                 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
536                         bmdma2 &= ~SIL_DMA_SATA_IRQ;
537 
538                 if (bmdma2 == 0xffffffff ||
539                     !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
540                         continue;
541 
542                 sil_host_intr(ap, bmdma2);
543                 handled = 1;
544         }
545 
546         spin_unlock(&host->lock);
547 
548         return IRQ_RETVAL(handled);
549 }
550 
551 static void sil_freeze(struct ata_port *ap)
552 {
553         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
554         u32 tmp;
555 
556         /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
557         writel(0, mmio_base + sil_port[ap->port_no].sien);
558 
559         /* plug IRQ */
560         tmp = readl(mmio_base + SIL_SYSCFG);
561         tmp |= SIL_MASK_IDE0_INT << ap->port_no;
562         writel(tmp, mmio_base + SIL_SYSCFG);
563         readl(mmio_base + SIL_SYSCFG);  /* flush */
564 
565         /* Ensure DMA_ENABLE is off.
566          *
567          * This is because the controller will not give us access to the
568          * taskfile registers while a DMA is in progress
569          */
570         iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
571                  ap->ioaddr.bmdma_addr);
572 
573         /* According to ata_bmdma_stop, an HDMA transition requires
574          * on PIO cycle. But we can't read a taskfile register.
575          */
576         ioread8(ap->ioaddr.bmdma_addr);
577 }
578 
579 static void sil_thaw(struct ata_port *ap)
580 {
581         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
582         u32 tmp;
583 
584         /* clear IRQ */
585         ap->ops->sff_check_status(ap);
586         ata_bmdma_irq_clear(ap);
587 
588         /* turn on SATA IRQ if supported */
589         if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
590                 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
591 
592         /* turn on IRQ */
593         tmp = readl(mmio_base + SIL_SYSCFG);
594         tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
595         writel(tmp, mmio_base + SIL_SYSCFG);
596 }
597 
598 /**
599  *      sil_dev_config - Apply device/host-specific errata fixups
600  *      @dev: Device to be examined
601  *
602  *      After the IDENTIFY [PACKET] DEVICE step is complete, and a
603  *      device is known to be present, this function is called.
604  *      We apply two errata fixups which are specific to Silicon Image,
605  *      a Seagate and a Maxtor fixup.
606  *
607  *      For certain Seagate devices, we must limit the maximum sectors
608  *      to under 8K.
609  *
610  *      For certain Maxtor devices, we must not program the drive
611  *      beyond udma5.
612  *
613  *      Both fixups are unfairly pessimistic.  As soon as I get more
614  *      information on these errata, I will create a more exhaustive
615  *      list, and apply the fixups to only the specific
616  *      devices/hosts/firmwares that need it.
617  *
618  *      20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
619  *      The Maxtor quirk is in the blacklist, but I'm keeping the original
620  *      pessimistic fix for the following reasons...
621  *      - There seems to be less info on it, only one device gleaned off the
622  *      Windows driver, maybe only one is affected.  More info would be greatly
623  *      appreciated.
624  *      - But then again UDMA5 is hardly anything to complain about
625  */
626 static void sil_dev_config(struct ata_device *dev)
627 {
628         struct ata_port *ap = dev->link->ap;
629         int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
630         unsigned int n, quirks = 0;
631         unsigned char model_num[ATA_ID_PROD_LEN + 1];
632 
633         ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
634 
635         for (n = 0; sil_blacklist[n].product; n++)
636                 if (!strcmp(sil_blacklist[n].product, model_num)) {
637                         quirks = sil_blacklist[n].quirk;
638                         break;
639                 }
640 
641         /* limit requests to 15 sectors */
642         if (slow_down ||
643             ((ap->flags & SIL_FLAG_MOD15WRITE) &&
644              (quirks & SIL_QUIRK_MOD15WRITE))) {
645                 if (print_info)
646                         ata_dev_info(dev,
647                 "applying Seagate errata fix (mod15write workaround)\n");
648                 dev->max_sectors = 15;
649                 return;
650         }
651 
652         /* limit to udma5 */
653         if (quirks & SIL_QUIRK_UDMA5MAX) {
654                 if (print_info)
655                         ata_dev_info(dev, "applying Maxtor errata fix %s\n",
656                                      model_num);
657                 dev->udma_mask &= ATA_UDMA5;
658                 return;
659         }
660 }
661 
662 static void sil_init_controller(struct ata_host *host)
663 {
664         struct pci_dev *pdev = to_pci_dev(host->dev);
665         void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
666         u8 cls;
667         u32 tmp;
668         int i;
669 
670         /* Initialize FIFO PCI bus arbitration */
671         cls = sil_get_device_cache_line(pdev);
672         if (cls) {
673                 cls >>= 3;
674                 cls++;  /* cls = (line_size/8)+1 */
675                 for (i = 0; i < host->n_ports; i++)
676                         writew(cls << 8 | cls,
677                                mmio_base + sil_port[i].fifo_cfg);
678         } else
679                 dev_warn(&pdev->dev,
680                          "cache line size not set.  Driver may not function\n");
681 
682         /* Apply R_ERR on DMA activate FIS errata workaround */
683         if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
684                 int cnt;
685 
686                 for (i = 0, cnt = 0; i < host->n_ports; i++) {
687                         tmp = readl(mmio_base + sil_port[i].sfis_cfg);
688                         if ((tmp & 0x3) != 0x01)
689                                 continue;
690                         if (!cnt)
691                                 dev_info(&pdev->dev,
692                                          "Applying R_ERR on DMA activate FIS errata fix\n");
693                         writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
694                         cnt++;
695                 }
696         }
697 
698         if (host->n_ports == 4) {
699                 /* flip the magic "make 4 ports work" bit */
700                 tmp = readl(mmio_base + sil_port[2].bmdma);
701                 if ((tmp & SIL_INTR_STEERING) == 0)
702                         writel(tmp | SIL_INTR_STEERING,
703                                mmio_base + sil_port[2].bmdma);
704         }
705 }
706 
707 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
708 {
709         static const struct dmi_system_id broken_systems[] = {
710                 {
711                         .ident = "HP Compaq nx6325",
712                         .matches = {
713                                 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
714                                 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
715                         },
716                         /* PCI slot number of the controller */
717                         .driver_data = (void *)0x12UL,
718                 },
719 
720                 { }     /* terminate list */
721         };
722         const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
723 
724         if (dmi) {
725                 unsigned long slot = (unsigned long)dmi->driver_data;
726                 /* apply the quirk only to on-board controllers */
727                 return slot == PCI_SLOT(pdev->devfn);
728         }
729 
730         return false;
731 }
732 
733 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
734 {
735         int board_id = ent->driver_data;
736         struct ata_port_info pi = sil_port_info[board_id];
737         const struct ata_port_info *ppi[] = { &pi, NULL };
738         struct ata_host *host;
739         void __iomem *mmio_base;
740         int n_ports, rc;
741         unsigned int i;
742 
743         ata_print_version_once(&pdev->dev, DRV_VERSION);
744 
745         /* allocate host */
746         n_ports = 2;
747         if (board_id == sil_3114)
748                 n_ports = 4;
749 
750         if (sil_broken_system_poweroff(pdev)) {
751                 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
752                                         ATA_FLAG_NO_HIBERNATE_SPINDOWN;
753                 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
754                                 "on poweroff and hibernation\n");
755         }
756 
757         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
758         if (!host)
759                 return -ENOMEM;
760 
761         /* acquire resources and fill host */
762         rc = pcim_enable_device(pdev);
763         if (rc)
764                 return rc;
765 
766         rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
767         if (rc == -EBUSY)
768                 pcim_pin_device(pdev);
769         if (rc)
770                 return rc;
771         host->iomap = pcim_iomap_table(pdev);
772 
773         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
774         if (rc)
775                 return rc;
776         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
777         if (rc)
778                 return rc;
779 
780         mmio_base = host->iomap[SIL_MMIO_BAR];
781 
782         for (i = 0; i < host->n_ports; i++) {
783                 struct ata_port *ap = host->ports[i];
784                 struct ata_ioports *ioaddr = &ap->ioaddr;
785 
786                 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
787                 ioaddr->altstatus_addr =
788                 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
789                 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
790                 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
791                 ata_sff_std_ports(ioaddr);
792 
793                 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
794                 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
795         }
796 
797         /* initialize and activate */
798         sil_init_controller(host);
799 
800         pci_set_master(pdev);
801         return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
802                                  &sil_sht);
803 }
804 
805 #ifdef CONFIG_PM_SLEEP
806 static int sil_pci_device_resume(struct pci_dev *pdev)
807 {
808         struct ata_host *host = pci_get_drvdata(pdev);
809         int rc;
810 
811         rc = ata_pci_device_do_resume(pdev);
812         if (rc)
813                 return rc;
814 
815         sil_init_controller(host);
816         ata_host_resume(host);
817 
818         return 0;
819 }
820 #endif
821 
822 module_pci_driver(sil_pci_driver);
823 

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