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Linux/drivers/ata/pata_hpt366.c

  1 /*
  2  * Libata driver for the highpoint 366 and 368 UDMA66 ATA controllers.
  3  *
  4  * This driver is heavily based upon:
  5  *
  6  * linux/drivers/ide/pci/hpt366.c               Version 0.36    April 25, 2003
  7  *
  8  * Copyright (C) 1999-2003              Andre Hedrick <andre@linux-ide.org>
  9  * Portions Copyright (C) 2001          Sun Microsystems, Inc.
 10  * Portions Copyright (C) 2003          Red Hat Inc
 11  *
 12  *
 13  * TODO
 14  *      Look into engine reset on timeout errors. Should not be required.
 15  */
 16 
 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 18 
 19 #include <linux/kernel.h>
 20 #include <linux/module.h>
 21 #include <linux/pci.h>
 22 #include <linux/blkdev.h>
 23 #include <linux/delay.h>
 24 #include <scsi/scsi_host.h>
 25 #include <linux/libata.h>
 26 
 27 #define DRV_NAME        "pata_hpt366"
 28 #define DRV_VERSION     "0.6.11"
 29 
 30 struct hpt_clock {
 31         u8      xfer_mode;
 32         u32     timing;
 33 };
 34 
 35 /* key for bus clock timings
 36  * bit
 37  * 0:3    data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
 38  *        cycles = value + 1
 39  * 4:7    data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
 40  *        cycles = value + 1
 41  * 8:11   cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
 42  *        register access.
 43  * 12:15  cmd_low_time. Active time of DIOW_/DIOR_ during task file
 44  *        register access.
 45  * 16:18  udma_cycle_time. Clock cycles for UDMA xfer?
 46  * 19:21  pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
 47  * 22:24  cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
 48  *        register access.
 49  * 28     UDMA enable.
 50  * 29     DMA  enable.
 51  * 30     PIO_MST enable. If set, the chip is in bus master mode during
 52  *        PIO xfer.
 53  * 31     FIFO enable.
 54  */
 55 
 56 static const struct hpt_clock hpt366_40[] = {
 57         {       XFER_UDMA_4,    0x900fd943      },
 58         {       XFER_UDMA_3,    0x900ad943      },
 59         {       XFER_UDMA_2,    0x900bd943      },
 60         {       XFER_UDMA_1,    0x9008d943      },
 61         {       XFER_UDMA_0,    0x9008d943      },
 62 
 63         {       XFER_MW_DMA_2,  0xa008d943      },
 64         {       XFER_MW_DMA_1,  0xa010d955      },
 65         {       XFER_MW_DMA_0,  0xa010d9fc      },
 66 
 67         {       XFER_PIO_4,     0xc008d963      },
 68         {       XFER_PIO_3,     0xc010d974      },
 69         {       XFER_PIO_2,     0xc010d997      },
 70         {       XFER_PIO_1,     0xc010d9c7      },
 71         {       XFER_PIO_0,     0xc018d9d9      },
 72         {       0,              0x0120d9d9      }
 73 };
 74 
 75 static const struct hpt_clock hpt366_33[] = {
 76         {       XFER_UDMA_4,    0x90c9a731      },
 77         {       XFER_UDMA_3,    0x90cfa731      },
 78         {       XFER_UDMA_2,    0x90caa731      },
 79         {       XFER_UDMA_1,    0x90cba731      },
 80         {       XFER_UDMA_0,    0x90c8a731      },
 81 
 82         {       XFER_MW_DMA_2,  0xa0c8a731      },
 83         {       XFER_MW_DMA_1,  0xa0c8a732      },      /* 0xa0c8a733 */
 84         {       XFER_MW_DMA_0,  0xa0c8a797      },
 85 
 86         {       XFER_PIO_4,     0xc0c8a731      },
 87         {       XFER_PIO_3,     0xc0c8a742      },
 88         {       XFER_PIO_2,     0xc0d0a753      },
 89         {       XFER_PIO_1,     0xc0d0a7a3      },      /* 0xc0d0a793 */
 90         {       XFER_PIO_0,     0xc0d0a7aa      },      /* 0xc0d0a7a7 */
 91         {       0,              0x0120a7a7      }
 92 };
 93 
 94 static const struct hpt_clock hpt366_25[] = {
 95         {       XFER_UDMA_4,    0x90c98521      },
 96         {       XFER_UDMA_3,    0x90cf8521      },
 97         {       XFER_UDMA_2,    0x90cf8521      },
 98         {       XFER_UDMA_1,    0x90cb8521      },
 99         {       XFER_UDMA_0,    0x90cb8521      },
100 
101         {       XFER_MW_DMA_2,  0xa0ca8521      },
102         {       XFER_MW_DMA_1,  0xa0ca8532      },
103         {       XFER_MW_DMA_0,  0xa0ca8575      },
104 
105         {       XFER_PIO_4,     0xc0ca8521      },
106         {       XFER_PIO_3,     0xc0ca8532      },
107         {       XFER_PIO_2,     0xc0ca8542      },
108         {       XFER_PIO_1,     0xc0d08572      },
109         {       XFER_PIO_0,     0xc0d08585      },
110         {       0,              0x01208585      }
111 };
112 
113 /**
114  *      hpt36x_find_mode        -       find the hpt36x timing
115  *      @ap: ATA port
116  *      @speed: transfer mode
117  *
118  *      Return the 32bit register programming information for this channel
119  *      that matches the speed provided.
120  */
121 
122 static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
123 {
124         struct hpt_clock *clocks = ap->host->private_data;
125 
126         while (clocks->xfer_mode) {
127                 if (clocks->xfer_mode == speed)
128                         return clocks->timing;
129                 clocks++;
130         }
131         BUG();
132         return 0xffffffffU;     /* silence compiler warning */
133 }
134 
135 static const char * const bad_ata33[] = {
136         "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
137         "Maxtor 90845U3", "Maxtor 90650U2",
138         "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5",
139         "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
140         "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6",
141         "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
142         "Maxtor 90510D4",
143         "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
144         "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7",
145         "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
146         "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5",
147         "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
148         NULL
149 };
150 
151 static const char * const bad_ata66_4[] = {
152         "IBM-DTLA-307075",
153         "IBM-DTLA-307060",
154         "IBM-DTLA-307045",
155         "IBM-DTLA-307030",
156         "IBM-DTLA-307020",
157         "IBM-DTLA-307015",
158         "IBM-DTLA-305040",
159         "IBM-DTLA-305030",
160         "IBM-DTLA-305020",
161         "IC35L010AVER07-0",
162         "IC35L020AVER07-0",
163         "IC35L030AVER07-0",
164         "IC35L040AVER07-0",
165         "IC35L060AVER07-0",
166         "WDC AC310200R",
167         NULL
168 };
169 
170 static const char * const bad_ata66_3[] = {
171         "WDC AC310200R",
172         NULL
173 };
174 
175 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
176                                const char * const list[])
177 {
178         unsigned char model_num[ATA_ID_PROD_LEN + 1];
179         int i;
180 
181         ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
182 
183         i = match_string(list, -1, model_num);
184         if (i >= 0) {
185                 pr_warn("%s is not supported for %s\n", modestr, list[i]);
186                 return 1;
187         }
188         return 0;
189 }
190 
191 /**
192  *      hpt366_filter   -       mode selection filter
193  *      @adev: ATA device
194  *
195  *      Block UDMA on devices that cause trouble with this controller.
196  */
197 
198 static unsigned long hpt366_filter(struct ata_device *adev, unsigned long mask)
199 {
200         if (adev->class == ATA_DEV_ATA) {
201                 if (hpt_dma_blacklisted(adev, "UDMA",  bad_ata33))
202                         mask &= ~ATA_MASK_UDMA;
203                 if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
204                         mask &= ~(0xF8 << ATA_SHIFT_UDMA);
205                 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
206                         mask &= ~(0xF0 << ATA_SHIFT_UDMA);
207         } else if (adev->class == ATA_DEV_ATAPI)
208                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
209 
210         return mask;
211 }
212 
213 static int hpt36x_cable_detect(struct ata_port *ap)
214 {
215         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
216         u8 ata66;
217 
218         /*
219          * Each channel of pata_hpt366 occupies separate PCI function
220          * as the primary channel and bit1 indicates the cable type.
221          */
222         pci_read_config_byte(pdev, 0x5A, &ata66);
223         if (ata66 & 2)
224                 return ATA_CBL_PATA40;
225         return ATA_CBL_PATA80;
226 }
227 
228 static void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
229                             u8 mode)
230 {
231         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
232         u32 addr = 0x40 + 4 * adev->devno;
233         u32 mask, reg, t;
234 
235         /* determine timing mask and find matching clock entry */
236         if (mode < XFER_MW_DMA_0)
237                 mask = 0xc1f8ffff;
238         else if (mode < XFER_UDMA_0)
239                 mask = 0x303800ff;
240         else
241                 mask = 0x30070000;
242 
243         t = hpt36x_find_mode(ap, mode);
244 
245         /*
246          * Combine new mode bits with old config bits and disable
247          * on-chip PIO FIFO/buffer (and PIO MST mode as well) to avoid
248          * problems handling I/O errors later.
249          */
250         pci_read_config_dword(pdev, addr, &reg);
251         reg = ((reg & ~mask) | (t & mask)) & ~0xc0000000;
252         pci_write_config_dword(pdev, addr, reg);
253 }
254 
255 /**
256  *      hpt366_set_piomode              -       PIO setup
257  *      @ap: ATA interface
258  *      @adev: device on the interface
259  *
260  *      Perform PIO mode setup.
261  */
262 
263 static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
264 {
265         hpt366_set_mode(ap, adev, adev->pio_mode);
266 }
267 
268 /**
269  *      hpt366_set_dmamode              -       DMA timing setup
270  *      @ap: ATA interface
271  *      @adev: Device being configured
272  *
273  *      Set up the channel for MWDMA or UDMA modes. Much the same as with
274  *      PIO, load the mode number and then set MWDMA or UDMA flag.
275  */
276 
277 static void hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
278 {
279         hpt366_set_mode(ap, adev, adev->dma_mode);
280 }
281 
282 static struct scsi_host_template hpt36x_sht = {
283         ATA_BMDMA_SHT(DRV_NAME),
284 };
285 
286 /*
287  *      Configuration for HPT366/68
288  */
289 
290 static struct ata_port_operations hpt366_port_ops = {
291         .inherits       = &ata_bmdma_port_ops,
292         .cable_detect   = hpt36x_cable_detect,
293         .mode_filter    = hpt366_filter,
294         .set_piomode    = hpt366_set_piomode,
295         .set_dmamode    = hpt366_set_dmamode,
296 };
297 
298 /**
299  *      hpt36x_init_chipset     -       common chip setup
300  *      @dev: PCI device
301  *
302  *      Perform the chip setup work that must be done at both init and
303  *      resume time
304  */
305 
306 static void hpt36x_init_chipset(struct pci_dev *dev)
307 {
308         u8 drive_fast;
309 
310         pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
311         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
312         pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
313         pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
314 
315         pci_read_config_byte(dev, 0x51, &drive_fast);
316         if (drive_fast & 0x80)
317                 pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
318 }
319 
320 /**
321  *      hpt36x_init_one         -       Initialise an HPT366/368
322  *      @dev: PCI device
323  *      @id: Entry in match table
324  *
325  *      Initialise an HPT36x device. There are some interesting complications
326  *      here. Firstly the chip may report 366 and be one of several variants.
327  *      Secondly all the timings depend on the clock for the chip which we must
328  *      detect and look up
329  *
330  *      This is the known chip mappings. It may be missing a couple of later
331  *      releases.
332  *
333  *      Chip version            PCI             Rev     Notes
334  *      HPT366                  4 (HPT366)      0       UDMA66
335  *      HPT366                  4 (HPT366)      1       UDMA66
336  *      HPT368                  4 (HPT366)      2       UDMA66
337  *      HPT37x/30x              4 (HPT366)      3+      Other driver
338  *
339  */
340 
341 static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
342 {
343         static const struct ata_port_info info_hpt366 = {
344                 .flags = ATA_FLAG_SLAVE_POSS,
345                 .pio_mask = ATA_PIO4,
346                 .mwdma_mask = ATA_MWDMA2,
347                 .udma_mask = ATA_UDMA4,
348                 .port_ops = &hpt366_port_ops
349         };
350         const struct ata_port_info *ppi[] = { &info_hpt366, NULL };
351 
352         const void *hpriv = NULL;
353         u32 reg1;
354         int rc;
355 
356         rc = pcim_enable_device(dev);
357         if (rc)
358                 return rc;
359 
360         /* May be a later chip in disguise. Check */
361         /* Newer chips are not in the HPT36x driver. Ignore them */
362         if (dev->revision > 2)
363                 return -ENODEV;
364 
365         hpt36x_init_chipset(dev);
366 
367         pci_read_config_dword(dev, 0x40,  &reg1);
368 
369         /* PCI clocking determines the ATA timing values to use */
370         /* info_hpt366 is safe against re-entry so we can scribble on it */
371         switch ((reg1 & 0xf00) >> 8) {
372         case 9:
373                 hpriv = &hpt366_40;
374                 break;
375         case 5:
376                 hpriv = &hpt366_25;
377                 break;
378         default:
379                 hpriv = &hpt366_33;
380                 break;
381         }
382         /* Now kick off ATA set up */
383         return ata_pci_bmdma_init_one(dev, ppi, &hpt36x_sht, (void *)hpriv, 0);
384 }
385 
386 #ifdef CONFIG_PM_SLEEP
387 static int hpt36x_reinit_one(struct pci_dev *dev)
388 {
389         struct ata_host *host = pci_get_drvdata(dev);
390         int rc;
391 
392         rc = ata_pci_device_do_resume(dev);
393         if (rc)
394                 return rc;
395         hpt36x_init_chipset(dev);
396         ata_host_resume(host);
397         return 0;
398 }
399 #endif
400 
401 static const struct pci_device_id hpt36x[] = {
402         { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
403         { },
404 };
405 
406 static struct pci_driver hpt36x_pci_driver = {
407         .name           = DRV_NAME,
408         .id_table       = hpt36x,
409         .probe          = hpt36x_init_one,
410         .remove         = ata_pci_remove_one,
411 #ifdef CONFIG_PM_SLEEP
412         .suspend        = ata_pci_device_suspend,
413         .resume         = hpt36x_reinit_one,
414 #endif
415 };
416 
417 module_pci_driver(hpt36x_pci_driver);
418 
419 MODULE_AUTHOR("Alan Cox");
420 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
421 MODULE_LICENSE("GPL");
422 MODULE_DEVICE_TABLE(pci, hpt36x);
423 MODULE_VERSION(DRV_VERSION);
424 

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