Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/ata/pata_atp867x.c

  1 /*
  2  * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
  3  *
  4  *      (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
  5  *
  6  * Per Atp867 data sheet rev 1.2, Acard.
  7  * Based in part on early ide code from
  8  *      2003-2004 by Eric Uhrhane, Google, Inc.
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License as published by
 12  * the Free Software Foundation; either version 2 of the License, or
 13  * (at your option) any later version.
 14  *
 15  * This program is distributed in the hope that it will be useful,
 16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  * GNU General Public License for more details.
 19  *
 20  * You should have received a copy of the GNU General Public License
 21  * along with this program; if not, write to the Free Software
 22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 23  *
 24  *
 25  * TODO:
 26  *   1. RAID features [comparison, XOR, striping, mirroring, etc.]
 27  */
 28 
 29 #include <linux/kernel.h>
 30 #include <linux/module.h>
 31 #include <linux/pci.h>
 32 #include <linux/init.h>
 33 #include <linux/blkdev.h>
 34 #include <linux/delay.h>
 35 #include <linux/device.h>
 36 #include <linux/gfp.h>
 37 #include <scsi/scsi_host.h>
 38 #include <linux/libata.h>
 39 
 40 #define DRV_NAME        "pata_atp867x"
 41 #define DRV_VERSION     "0.7.5"
 42 
 43 /*
 44  * IO Registers
 45  * Note that all runtime hot priv ports are cached in ap private_data
 46  */
 47 
 48 enum {
 49         ATP867X_IO_CHANNEL_OFFSET       = 0x10,
 50 
 51         /*
 52          * IO Register Bitfields
 53          */
 54 
 55         ATP867X_IO_PIOSPD_ACTIVE_SHIFT  = 4,
 56         ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
 57 
 58         ATP867X_IO_DMAMODE_MSTR_SHIFT   = 0,
 59         ATP867X_IO_DMAMODE_MSTR_MASK    = 0x07,
 60         ATP867X_IO_DMAMODE_SLAVE_SHIFT  = 4,
 61         ATP867X_IO_DMAMODE_SLAVE_MASK   = 0x70,
 62 
 63         ATP867X_IO_DMAMODE_UDMA_6       = 0x07,
 64         ATP867X_IO_DMAMODE_UDMA_5       = 0x06,
 65         ATP867X_IO_DMAMODE_UDMA_4       = 0x05,
 66         ATP867X_IO_DMAMODE_UDMA_3       = 0x04,
 67         ATP867X_IO_DMAMODE_UDMA_2       = 0x03,
 68         ATP867X_IO_DMAMODE_UDMA_1       = 0x02,
 69         ATP867X_IO_DMAMODE_UDMA_0       = 0x01,
 70         ATP867X_IO_DMAMODE_DISABLE      = 0x00,
 71 
 72         ATP867X_IO_SYS_INFO_66MHZ       = 0x04,
 73         ATP867X_IO_SYS_INFO_SLOW_UDMA5  = 0x02,
 74         ATP867X_IO_SYS_MASK_RESERVED    = (~0xf1),
 75 
 76         ATP867X_IO_PORTSPD_VAL          = 0x1143,
 77         ATP867X_PREREAD_VAL             = 0x0200,
 78 
 79         ATP867X_NUM_PORTS               = 4,
 80         ATP867X_BAR_IOBASE              = 0,
 81         ATP867X_BAR_ROMBASE             = 6,
 82 };
 83 
 84 #define ATP867X_IOBASE(ap)              ((ap)->host->iomap[0])
 85 #define ATP867X_SYS_INFO(ap)            (0x3F + ATP867X_IOBASE(ap))
 86 
 87 #define ATP867X_IO_PORTBASE(ap, port)   (0x00 + ATP867X_IOBASE(ap) + \
 88                                         (port) * ATP867X_IO_CHANNEL_OFFSET)
 89 #define ATP867X_IO_DMABASE(ap, port)    (0x40 + \
 90                                         ATP867X_IO_PORTBASE((ap), (port)))
 91 
 92 #define ATP867X_IO_STATUS(ap, port)     (0x07 + \
 93                                         ATP867X_IO_PORTBASE((ap), (port)))
 94 #define ATP867X_IO_ALTSTATUS(ap, port)  (0x0E + \
 95                                         ATP867X_IO_PORTBASE((ap), (port)))
 96 
 97 /*
 98  * hot priv ports
 99  */
100 #define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
101                                         ATP867X_IO_DMABASE((ap), (port)))
102 #define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
103                                         ATP867X_IO_DMABASE((ap), (port)))
104 #define ATP867X_IO_8BPIOSPD(ap, port)   (0x0A + \
105                                         ATP867X_IO_DMABASE((ap), (port)))
106 #define ATP867X_IO_DMAMODE(ap, port)    (0x0B + \
107                                         ATP867X_IO_DMABASE((ap), (port)))
108 
109 #define ATP867X_IO_PORTSPD(ap, port)    (0x4A + \
110                                         ATP867X_IO_PORTBASE((ap), (port)))
111 #define ATP867X_IO_PREREAD(ap, port)    (0x4C + \
112                                         ATP867X_IO_PORTBASE((ap), (port)))
113 
114 struct atp867x_priv {
115         void __iomem *dma_mode;
116         void __iomem *mstr_piospd;
117         void __iomem *slave_piospd;
118         void __iomem *eightb_piospd;
119         int             pci66mhz;
120 };
121 
122 static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
123 {
124         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
125         struct atp867x_priv *dp = ap->private_data;
126         u8 speed = adev->dma_mode;
127         u8 b;
128         u8 mode = speed - XFER_UDMA_0 + 1;
129 
130         /*
131          * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
132          * on 66MHz bus
133          *   rev-A: UDMA_1~4 (5, 6 no change)
134          *   rev-B: all UDMA modes
135          *   UDMA_0 stays not to disable UDMA
136          */
137         if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0  &&
138            (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
139             mode < ATP867X_IO_DMAMODE_UDMA_5))
140                 mode--;
141 
142         b = ioread8(dp->dma_mode);
143         if (adev->devno & 1) {
144                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
145                         (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
146         } else {
147                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
148                         (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
149         }
150         iowrite8(b, dp->dma_mode);
151 }
152 
153 static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
154         unsigned int clk)
155 {
156         struct atp867x_priv *dp = ap->private_data;
157         unsigned char clocks = clk;
158 
159         /*
160          * Doc 6.6.9: increase the clock value by 1 for safer PIO speed
161          * on 66MHz bus
162          */
163         if (dp->pci66mhz)
164                 clocks++;
165 
166         switch (clocks) {
167         case 0:
168                 clocks = 1;
169                 break;
170         case 1 ... 6:
171                 break;
172         default:
173                 printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
174                         "Using 12clk.\n", clk);
175         case 9 ... 12:
176                 clocks = 7;     /* 12 clk */
177                 break;
178         case 7:
179         case 8: /* default 8 clk */
180                 clocks = 0;
181                 goto active_clock_shift_done;
182         }
183 
184 active_clock_shift_done:
185         return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
186 }
187 
188 static int atp867x_get_recover_clocks_shifted(unsigned int clk)
189 {
190         unsigned char clocks = clk;
191 
192         switch (clocks) {
193         case 0:
194                 clocks = 1;
195                 break;
196         case 1 ... 11:
197                 break;
198         case 13:
199         case 14:
200                 --clocks;       /* by the spec */
201                 break;
202         case 15:
203                 break;
204         default:
205                 printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
206                         "Using default 12clk.\n", clk);
207         case 12:        /* default 12 clk */
208                 clocks = 0;
209                 break;
210         }
211 
212         return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
213 }
214 
215 static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
216 {
217         struct ata_device *peer = ata_dev_pair(adev);
218         struct atp867x_priv *dp = ap->private_data;
219         u8 speed = adev->pio_mode;
220         struct ata_timing t, p;
221         int T, UT;
222         u8 b;
223 
224         T = 1000000000 / 33333;
225         UT = T / 4;
226 
227         ata_timing_compute(adev, speed, &t, T, UT);
228         if (peer && peer->pio_mode) {
229                 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
230                 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
231         }
232 
233         b = ioread8(dp->dma_mode);
234         if (adev->devno & 1)
235                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
236         else
237                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
238         iowrite8(b, dp->dma_mode);
239 
240         b = atp867x_get_active_clocks_shifted(ap, t.active) |
241             atp867x_get_recover_clocks_shifted(t.recover);
242 
243         if (adev->devno & 1)
244                 iowrite8(b, dp->slave_piospd);
245         else
246                 iowrite8(b, dp->mstr_piospd);
247 
248         b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
249             atp867x_get_recover_clocks_shifted(t.rec8b);
250 
251         iowrite8(b, dp->eightb_piospd);
252 }
253 
254 static int atp867x_cable_override(struct pci_dev *pdev)
255 {
256         if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
257                 (pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
258                  pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
259                 return 1;
260         }
261         return 0;
262 }
263 
264 static int atp867x_cable_detect(struct ata_port *ap)
265 {
266         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
267 
268         if (atp867x_cable_override(pdev))
269                 return ATA_CBL_PATA40_SHORT;
270 
271         return ATA_CBL_PATA_UNK;
272 }
273 
274 static struct scsi_host_template atp867x_sht = {
275         ATA_BMDMA_SHT(DRV_NAME),
276 };
277 
278 static struct ata_port_operations atp867x_ops = {
279         .inherits               = &ata_bmdma_port_ops,
280         .cable_detect           = atp867x_cable_detect,
281         .set_piomode            = atp867x_set_piomode,
282         .set_dmamode            = atp867x_set_dmamode,
283 };
284 
285 
286 #ifdef  ATP867X_DEBUG
287 static void atp867x_check_res(struct pci_dev *pdev)
288 {
289         int i;
290         unsigned long start, len;
291 
292         /* Check the PCI resources for this channel are enabled */
293         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
294                 start = pci_resource_start(pdev, i);
295                 len   = pci_resource_len(pdev, i);
296                 printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
297                         start, len);
298         }
299 }
300 
301 static void atp867x_check_ports(struct ata_port *ap, int port)
302 {
303         struct ata_ioports *ioaddr = &ap->ioaddr;
304         struct atp867x_priv *dp = ap->private_data;
305 
306         printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
307                 "  cmd_addr     =0x%llx, 0x%llx\n"
308                 "  ctl_addr     =0x%llx, 0x%llx\n"
309                 "  bmdma_addr   =0x%llx, 0x%llx\n"
310                 "  data_addr    =0x%llx\n"
311                 "  error_addr   =0x%llx\n"
312                 "  feature_addr =0x%llx\n"
313                 "  nsect_addr   =0x%llx\n"
314                 "  lbal_addr    =0x%llx\n"
315                 "  lbam_addr    =0x%llx\n"
316                 "  lbah_addr    =0x%llx\n"
317                 "  device_addr  =0x%llx\n"
318                 "  status_addr  =0x%llx\n"
319                 "  command_addr =0x%llx\n"
320                 "  dp->dma_mode =0x%llx\n"
321                 "  dp->mstr_piospd      =0x%llx\n"
322                 "  dp->slave_piospd     =0x%llx\n"
323                 "  dp->eightb_piospd    =0x%llx\n"
324                 "  dp->pci66mhz         =0x%lx\n",
325                 port,
326                 (unsigned long long)ioaddr->cmd_addr,
327                 (unsigned long long)ATP867X_IO_PORTBASE(ap, port),
328                 (unsigned long long)ioaddr->ctl_addr,
329                 (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
330                 (unsigned long long)ioaddr->bmdma_addr,
331                 (unsigned long long)ATP867X_IO_DMABASE(ap, port),
332                 (unsigned long long)ioaddr->data_addr,
333                 (unsigned long long)ioaddr->error_addr,
334                 (unsigned long long)ioaddr->feature_addr,
335                 (unsigned long long)ioaddr->nsect_addr,
336                 (unsigned long long)ioaddr->lbal_addr,
337                 (unsigned long long)ioaddr->lbam_addr,
338                 (unsigned long long)ioaddr->lbah_addr,
339                 (unsigned long long)ioaddr->device_addr,
340                 (unsigned long long)ioaddr->status_addr,
341                 (unsigned long long)ioaddr->command_addr,
342                 (unsigned long long)dp->dma_mode,
343                 (unsigned long long)dp->mstr_piospd,
344                 (unsigned long long)dp->slave_piospd,
345                 (unsigned long long)dp->eightb_piospd,
346                 (unsigned long)dp->pci66mhz);
347 }
348 #endif
349 
350 static int atp867x_set_priv(struct ata_port *ap)
351 {
352         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
353         struct atp867x_priv *dp;
354         int port = ap->port_no;
355 
356         dp = ap->private_data =
357                 devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
358         if (dp == NULL)
359                 return -ENOMEM;
360 
361         dp->dma_mode     = ATP867X_IO_DMAMODE(ap, port);
362         dp->mstr_piospd  = ATP867X_IO_MSTRPIOSPD(ap, port);
363         dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
364         dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
365 
366         dp->pci66mhz =
367                 ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
368 
369         return 0;
370 }
371 
372 static void atp867x_fixup(struct ata_host *host)
373 {
374         struct pci_dev *pdev = to_pci_dev(host->dev);
375         struct ata_port *ap = host->ports[0];
376         int i;
377         u8 v;
378 
379         /*
380          * Broken BIOS might not set latency high enough
381          */
382         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
383         if (v < 0x80) {
384                 v = 0x80;
385                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
386                 printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
387                         " to %d\n", pci_name(pdev), v);
388         }
389 
390         /*
391          * init 8bit io ports speed(0aaarrrr) to 43h and
392          * init udma modes of master/slave to 0/0(11h)
393          */
394         for (i = 0; i < ATP867X_NUM_PORTS; i++)
395                 iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
396 
397         /*
398          * init PreREAD counts
399          */
400         for (i = 0; i < ATP867X_NUM_PORTS; i++)
401                 iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
402 
403         v = ioread8(ATP867X_IOBASE(ap) + 0x28);
404         v &= 0xcf;      /* Enable INTA#: bit4=0 means enable */
405         v |= 0xc0;      /* Enable PCI burst, MRM & not immediate interrupts */
406         iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
407 
408         /*
409          * Turn off the over clocked udma5 mode, only for Rev-B
410          */
411         v = ioread8(ATP867X_SYS_INFO(ap));
412         v &= ATP867X_IO_SYS_MASK_RESERVED;
413         if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
414                 v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
415         iowrite8(v, ATP867X_SYS_INFO(ap));
416 }
417 
418 static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
419 {
420         struct device *gdev = host->dev;
421         struct pci_dev *pdev = to_pci_dev(gdev);
422         unsigned int mask = 0;
423         int i, rc;
424 
425         /*
426          * do not map rombase
427          */
428         rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
429         if (rc == -EBUSY)
430                 pcim_pin_device(pdev);
431         if (rc)
432                 return rc;
433         host->iomap = pcim_iomap_table(pdev);
434 
435 #ifdef  ATP867X_DEBUG
436         atp867x_check_res(pdev);
437 
438         for (i = 0; i < PCI_ROM_RESOURCE; i++)
439                 printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
440                         (unsigned long long)(host->iomap[i]));
441 #endif
442 
443         /*
444          * request, iomap BARs and init port addresses accordingly
445          */
446         for (i = 0; i < host->n_ports; i++) {
447                 struct ata_port *ap = host->ports[i];
448                 struct ata_ioports *ioaddr = &ap->ioaddr;
449 
450                 ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
451                 ioaddr->ctl_addr = ioaddr->altstatus_addr
452                                  = ATP867X_IO_ALTSTATUS(ap, i);
453                 ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
454 
455                 ata_sff_std_ports(ioaddr);
456                 rc = atp867x_set_priv(ap);
457                 if (rc)
458                         return rc;
459 
460 #ifdef  ATP867X_DEBUG
461                 atp867x_check_ports(ap, i);
462 #endif
463                 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
464                         (unsigned long)ioaddr->cmd_addr,
465                         (unsigned long)ioaddr->ctl_addr);
466                 ata_port_desc(ap, "bmdma 0x%lx",
467                         (unsigned long)ioaddr->bmdma_addr);
468 
469                 mask |= 1 << i;
470         }
471 
472         if (!mask) {
473                 dev_err(gdev, "no available native port\n");
474                 return -ENODEV;
475         }
476 
477         atp867x_fixup(host);
478 
479         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
480         if (rc)
481                 return rc;
482 
483         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
484         return rc;
485 }
486 
487 static int atp867x_init_one(struct pci_dev *pdev,
488         const struct pci_device_id *id)
489 {
490         static const struct ata_port_info info_867x = {
491                 .flags          = ATA_FLAG_SLAVE_POSS,
492                 .pio_mask       = ATA_PIO4,
493                 .udma_mask      = ATA_UDMA6,
494                 .port_ops       = &atp867x_ops,
495         };
496 
497         struct ata_host *host;
498         const struct ata_port_info *ppi[] = { &info_867x, NULL };
499         int rc;
500 
501         ata_print_version_once(&pdev->dev, DRV_VERSION);
502 
503         rc = pcim_enable_device(pdev);
504         if (rc)
505                 return rc;
506 
507         printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
508                 pdev->device);
509 
510         host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
511         if (!host) {
512                 dev_err(&pdev->dev, "failed to allocate ATA host\n");
513                 rc = -ENOMEM;
514                 goto err_out;
515         }
516 
517         rc = atp867x_ata_pci_sff_init_host(host);
518         if (rc) {
519                 dev_err(&pdev->dev, "failed to init host\n");
520                 goto err_out;
521         }
522 
523         pci_set_master(pdev);
524 
525         rc = ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
526                                 IRQF_SHARED, &atp867x_sht);
527         if (rc)
528                 dev_err(&pdev->dev, "failed to activate host\n");
529 
530 err_out:
531         return rc;
532 }
533 
534 #ifdef CONFIG_PM
535 static int atp867x_reinit_one(struct pci_dev *pdev)
536 {
537         struct ata_host *host = pci_get_drvdata(pdev);
538         int rc;
539 
540         rc = ata_pci_device_do_resume(pdev);
541         if (rc)
542                 return rc;
543 
544         atp867x_fixup(host);
545 
546         ata_host_resume(host);
547         return 0;
548 }
549 #endif
550 
551 static struct pci_device_id atp867x_pci_tbl[] = {
552         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A),      0 },
553         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B),      0 },
554         { },
555 };
556 
557 static struct pci_driver atp867x_driver = {
558         .name           = DRV_NAME,
559         .id_table       = atp867x_pci_tbl,
560         .probe          = atp867x_init_one,
561         .remove         = ata_pci_remove_one,
562 #ifdef CONFIG_PM
563         .suspend        = ata_pci_device_suspend,
564         .resume         = atp867x_reinit_one,
565 #endif
566 };
567 
568 module_pci_driver(atp867x_driver);
569 
570 MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
571 MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
572 MODULE_LICENSE("GPL");
573 MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
574 MODULE_VERSION(DRV_VERSION);
575 

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