2 * pata_amd.c - AMD PATA for new ATA layer
3 * (C) 2005-2006 Red Hat Inc
5 * Based on pata-sil680. Errata information is taken from data sheets
6 * and the amd74xx.c driver by Vojtech Pavlik. Nvidia SATA devices are
7 * claimed by sata-nv.c.
10 * Variable system clock when/if it makes sense
11 * Power management on ports
14 * Documentation publicly available.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/blkdev.h>
21 #include <linux/delay.h>
22 #include <scsi/scsi_host.h>
23 #include <linux/libata.h>
25 #define DRV_NAME "pata_amd"
26 #define DRV_VERSION "0.4.1"
29 * timing_setup - shared timing computation and load
30 * @ap: ATA port being set up
31 * @adev: drive being configured
32 * @offset: port offset
33 * @speed: target speed
34 * @clock: clock multiplier (number of times 33MHz for this part)
36 * Perform the actual timing set up for Nvidia or AMD PATA devices.
37 * The actual devices vary so they all call into this helper function
38 * providing the clock multipler and offset (because AMD and Nvidia put
39 * the ports at different locations).
42 static void timing_setup(struct ata_port
*ap
, struct ata_device
*adev
, int offset
, int speed
, int clock
)
44 static const unsigned char amd_cyc2udma
[] = {
45 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7
48 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
49 struct ata_device
*peer
= ata_dev_pair(adev
);
50 int dn
= ap
->port_no
* 2 + adev
->devno
;
51 struct ata_timing at
, apeer
;
53 const int amd_clock
= 33333; /* KHz. */
56 T
= 1000000000 / amd_clock
;
61 if (ata_timing_compute(adev
, speed
, &at
, T
, UT
) < 0) {
62 dev_err(&pdev
->dev
, "unknown mode %d\n", speed
);
67 /* This may be over conservative */
69 ata_timing_compute(peer
, peer
->dma_mode
, &apeer
, T
, UT
);
70 ata_timing_merge(&apeer
, &at
, &at
, ATA_TIMING_8BIT
);
72 ata_timing_compute(peer
, peer
->pio_mode
, &apeer
, T
, UT
);
73 ata_timing_merge(&apeer
, &at
, &at
, ATA_TIMING_8BIT
);
76 if (speed
== XFER_UDMA_5
&& amd_clock
<= 33333) at
.udma
= 1;
77 if (speed
== XFER_UDMA_6
&& amd_clock
<= 33333) at
.udma
= 15;
80 * Now do the setup work
83 /* Configure the address set up timing */
84 pci_read_config_byte(pdev
, offset
+ 0x0C, &t
);
85 t
= (t
& ~(3 << ((3 - dn
) << 1))) | ((clamp_val(at
.setup
, 1, 4) - 1) << ((3 - dn
) << 1));
86 pci_write_config_byte(pdev
, offset
+ 0x0C , t
);
88 /* Configure the 8bit I/O timing */
89 pci_write_config_byte(pdev
, offset
+ 0x0E + (1 - (dn
>> 1)),
90 ((clamp_val(at
.act8b
, 1, 16) - 1) << 4) | (clamp_val(at
.rec8b
, 1, 16) - 1));
93 pci_write_config_byte(pdev
, offset
+ 0x08 + (3 - dn
),
94 ((clamp_val(at
.active
, 1, 16) - 1) << 4) | (clamp_val(at
.recover
, 1, 16) - 1));
98 t
= at
.udma
? (0xc0 | (clamp_val(at
.udma
, 2, 5) - 2)) : 0x03;
102 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 2, 10)]) : 0x03;
106 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 1, 10)]) : 0x03;
110 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 1, 15)]) : 0x03;
119 pci_write_config_byte(pdev
, offset
+ 0x10 + (3 - dn
), t
);
123 * amd_pre_reset - perform reset handling
125 * @deadline: deadline jiffies for the operation
127 * Reset sequence checking enable bits to see which ports are
131 static int amd_pre_reset(struct ata_link
*link
, unsigned long deadline
)
133 static const struct pci_bits amd_enable_bits
[] = {
134 { 0x40, 1, 0x02, 0x02 },
135 { 0x40, 1, 0x01, 0x01 }
138 struct ata_port
*ap
= link
->ap
;
139 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
141 if (!pci_test_config_bits(pdev
, &amd_enable_bits
[ap
->port_no
]))
144 return ata_sff_prereset(link
, deadline
);
148 * amd_cable_detect - report cable type
151 * AMD controller/BIOS setups record the cable type in word 0x42
154 static int amd_cable_detect(struct ata_port
*ap
)
156 static const u32 bitmask
[2] = {0x03, 0x0C};
157 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
160 pci_read_config_byte(pdev
, 0x42, &ata66
);
161 if (ata66
& bitmask
[ap
->port_no
])
162 return ATA_CBL_PATA80
;
163 return ATA_CBL_PATA40
;
167 * amd_fifo_setup - set the PIO FIFO for ATA/ATAPI
171 * Set the PCI fifo for this device according to the devices present
172 * on the bus at this point in time. We need to turn the post write buffer
173 * off for ATAPI devices as we may need to issue a word sized write to the
174 * device as the final I/O
177 static void amd_fifo_setup(struct ata_port
*ap
)
179 struct ata_device
*adev
;
180 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
181 static const u8 fifobit
[2] = { 0xC0, 0x30};
182 u8 fifo
= fifobit
[ap
->port_no
];
186 ata_for_each_dev(adev
, &ap
->link
, ENABLED
) {
187 if (adev
->class == ATA_DEV_ATAPI
)
190 if (pdev
->device
== PCI_DEVICE_ID_AMD_VIPER_7411
) /* FIFO is broken */
193 /* On the later chips the read prefetch bits become no-op bits */
194 pci_read_config_byte(pdev
, 0x41, &r
);
195 r
&= ~fifobit
[ap
->port_no
];
197 pci_write_config_byte(pdev
, 0x41, r
);
201 * amd33_set_piomode - set initial PIO mode data
205 * Program the AMD registers for PIO mode.
208 static void amd33_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
211 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 1);
214 static void amd66_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
217 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 2);
220 static void amd100_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
223 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 3);
226 static void amd133_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
229 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 4);
233 * amd33_set_dmamode - set initial DMA mode data
237 * Program the MWDMA/UDMA modes for the AMD and Nvidia
241 static void amd33_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
243 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 1);
246 static void amd66_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
248 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 2);
251 static void amd100_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
253 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 3);
256 static void amd133_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
258 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 4);
261 /* Both host-side and drive-side detection results are worthless on NV
262 * PATAs. Ignore them and just follow what BIOS configured. Both the
263 * current configuration in PCI config reg and ACPI GTM result are
264 * cached during driver attach and are consulted to select transfer
267 static unsigned long nv_mode_filter(struct ata_device
*dev
,
268 unsigned long xfer_mask
)
270 static const unsigned int udma_mask_map
[] =
271 { ATA_UDMA2
, ATA_UDMA1
, ATA_UDMA0
, 0,
272 ATA_UDMA3
, ATA_UDMA4
, ATA_UDMA5
, ATA_UDMA6
};
273 struct ata_port
*ap
= dev
->link
->ap
;
274 char acpi_str
[32] = "";
275 u32 saved_udma
, udma
;
276 const struct ata_acpi_gtm
*gtm
;
277 unsigned long bios_limit
= 0, acpi_limit
= 0, limit
;
279 /* find out what BIOS configured */
280 udma
= saved_udma
= (unsigned long)ap
->host
->private_data
;
282 if (ap
->port_no
== 0)
287 if ((udma
& 0xc0) == 0xc0)
288 bios_limit
= ata_pack_xfermask(0, 0, udma_mask_map
[udma
& 0x7]);
290 /* consult ACPI GTM too */
291 gtm
= ata_acpi_init_gtm(ap
);
293 acpi_limit
= ata_acpi_gtm_xfermask(dev
, gtm
);
295 snprintf(acpi_str
, sizeof(acpi_str
), " (%u:%u:0x%x)",
296 gtm
->drive
[0].dma
, gtm
->drive
[1].dma
, gtm
->flags
);
299 /* be optimistic, EH can take care of things if something goes wrong */
300 limit
= bios_limit
| acpi_limit
;
302 /* If PIO or DMA isn't configured at all, don't limit. Let EH
305 if (!(limit
& ATA_MASK_PIO
))
306 limit
|= ATA_MASK_PIO
;
307 if (!(limit
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
)))
308 limit
|= ATA_MASK_MWDMA
| ATA_MASK_UDMA
;
309 /* PIO4, MWDMA2, UDMA2 should always be supported regardless of
310 cable detection result */
311 limit
|= ata_pack_xfermask(ATA_PIO4
, ATA_MWDMA2
, ATA_UDMA2
);
313 ata_port_dbg(ap
, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, "
314 "BIOS=0x%lx (0x%x) ACPI=0x%lx%s\n",
315 xfer_mask
, limit
, xfer_mask
& limit
, bios_limit
,
316 saved_udma
, acpi_limit
, acpi_str
);
318 return xfer_mask
& limit
;
322 * nv_probe_init - cable detection
325 * Perform cable detection. The BIOS stores this in PCI config
329 static int nv_pre_reset(struct ata_link
*link
, unsigned long deadline
)
331 static const struct pci_bits nv_enable_bits
[] = {
332 { 0x50, 1, 0x02, 0x02 },
333 { 0x50, 1, 0x01, 0x01 }
336 struct ata_port
*ap
= link
->ap
;
337 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
339 if (!pci_test_config_bits(pdev
, &nv_enable_bits
[ap
->port_no
]))
342 return ata_sff_prereset(link
, deadline
);
346 * nv100_set_piomode - set initial PIO mode data
350 * Program the AMD registers for PIO mode.
353 static void nv100_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
355 timing_setup(ap
, adev
, 0x50, adev
->pio_mode
, 3);
358 static void nv133_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
360 timing_setup(ap
, adev
, 0x50, adev
->pio_mode
, 4);
364 * nv100_set_dmamode - set initial DMA mode data
368 * Program the MWDMA/UDMA modes for the AMD and Nvidia
372 static void nv100_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
374 timing_setup(ap
, adev
, 0x50, adev
->dma_mode
, 3);
377 static void nv133_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
379 timing_setup(ap
, adev
, 0x50, adev
->dma_mode
, 4);
382 static void nv_host_stop(struct ata_host
*host
)
384 u32 udma
= (unsigned long)host
->private_data
;
386 /* restore PCI config register 0x60 */
387 pci_write_config_dword(to_pci_dev(host
->dev
), 0x60, udma
);
390 static struct scsi_host_template amd_sht
= {
391 ATA_BMDMA_SHT(DRV_NAME
),
394 static const struct ata_port_operations amd_base_port_ops
= {
395 .inherits
= &ata_bmdma32_port_ops
,
396 .prereset
= amd_pre_reset
,
399 static struct ata_port_operations amd33_port_ops
= {
400 .inherits
= &amd_base_port_ops
,
401 .cable_detect
= ata_cable_40wire
,
402 .set_piomode
= amd33_set_piomode
,
403 .set_dmamode
= amd33_set_dmamode
,
406 static struct ata_port_operations amd66_port_ops
= {
407 .inherits
= &amd_base_port_ops
,
408 .cable_detect
= ata_cable_unknown
,
409 .set_piomode
= amd66_set_piomode
,
410 .set_dmamode
= amd66_set_dmamode
,
413 static struct ata_port_operations amd100_port_ops
= {
414 .inherits
= &amd_base_port_ops
,
415 .cable_detect
= ata_cable_unknown
,
416 .set_piomode
= amd100_set_piomode
,
417 .set_dmamode
= amd100_set_dmamode
,
420 static struct ata_port_operations amd133_port_ops
= {
421 .inherits
= &amd_base_port_ops
,
422 .cable_detect
= amd_cable_detect
,
423 .set_piomode
= amd133_set_piomode
,
424 .set_dmamode
= amd133_set_dmamode
,
427 static const struct ata_port_operations nv_base_port_ops
= {
428 .inherits
= &ata_bmdma_port_ops
,
429 .cable_detect
= ata_cable_ignore
,
430 .mode_filter
= nv_mode_filter
,
431 .prereset
= nv_pre_reset
,
432 .host_stop
= nv_host_stop
,
435 static struct ata_port_operations nv100_port_ops
= {
436 .inherits
= &nv_base_port_ops
,
437 .set_piomode
= nv100_set_piomode
,
438 .set_dmamode
= nv100_set_dmamode
,
441 static struct ata_port_operations nv133_port_ops
= {
442 .inherits
= &nv_base_port_ops
,
443 .set_piomode
= nv133_set_piomode
,
444 .set_dmamode
= nv133_set_dmamode
,
447 static void amd_clear_fifo(struct pci_dev
*pdev
)
450 /* Disable the FIFO, the FIFO logic will re-enable it as
452 pci_read_config_byte(pdev
, 0x41, &fifo
);
454 pci_write_config_byte(pdev
, 0x41, fifo
);
457 static int amd_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
459 static const struct ata_port_info info
[10] = {
460 { /* 0: AMD 7401 - no swdma */
461 .flags
= ATA_FLAG_SLAVE_POSS
,
462 .pio_mask
= ATA_PIO4
,
463 .mwdma_mask
= ATA_MWDMA2
,
464 .udma_mask
= ATA_UDMA2
,
465 .port_ops
= &amd33_port_ops
467 { /* 1: Early AMD7409 - no swdma */
468 .flags
= ATA_FLAG_SLAVE_POSS
,
469 .pio_mask
= ATA_PIO4
,
470 .mwdma_mask
= ATA_MWDMA2
,
471 .udma_mask
= ATA_UDMA4
,
472 .port_ops
= &amd66_port_ops
475 .flags
= ATA_FLAG_SLAVE_POSS
,
476 .pio_mask
= ATA_PIO4
,
477 .mwdma_mask
= ATA_MWDMA2
,
478 .udma_mask
= ATA_UDMA4
,
479 .port_ops
= &amd66_port_ops
482 .flags
= ATA_FLAG_SLAVE_POSS
,
483 .pio_mask
= ATA_PIO4
,
484 .mwdma_mask
= ATA_MWDMA2
,
485 .udma_mask
= ATA_UDMA5
,
486 .port_ops
= &amd100_port_ops
489 .flags
= ATA_FLAG_SLAVE_POSS
,
490 .pio_mask
= ATA_PIO4
,
491 .mwdma_mask
= ATA_MWDMA2
,
492 .udma_mask
= ATA_UDMA5
,
493 .port_ops
= &amd100_port_ops
495 { /* 5: AMD 8111 - no swdma */
496 .flags
= ATA_FLAG_SLAVE_POSS
,
497 .pio_mask
= ATA_PIO4
,
498 .mwdma_mask
= ATA_MWDMA2
,
499 .udma_mask
= ATA_UDMA6
,
500 .port_ops
= &amd133_port_ops
502 { /* 6: AMD 8111 UDMA 100 (Serenade) - no swdma */
503 .flags
= ATA_FLAG_SLAVE_POSS
,
504 .pio_mask
= ATA_PIO4
,
505 .mwdma_mask
= ATA_MWDMA2
,
506 .udma_mask
= ATA_UDMA5
,
507 .port_ops
= &amd133_port_ops
509 { /* 7: Nvidia Nforce */
510 .flags
= ATA_FLAG_SLAVE_POSS
,
511 .pio_mask
= ATA_PIO4
,
512 .mwdma_mask
= ATA_MWDMA2
,
513 .udma_mask
= ATA_UDMA5
,
514 .port_ops
= &nv100_port_ops
516 { /* 8: Nvidia Nforce2 and later - no swdma */
517 .flags
= ATA_FLAG_SLAVE_POSS
,
518 .pio_mask
= ATA_PIO4
,
519 .mwdma_mask
= ATA_MWDMA2
,
520 .udma_mask
= ATA_UDMA6
,
521 .port_ops
= &nv133_port_ops
523 { /* 9: AMD CS5536 (Geode companion) */
524 .flags
= ATA_FLAG_SLAVE_POSS
,
525 .pio_mask
= ATA_PIO4
,
526 .mwdma_mask
= ATA_MWDMA2
,
527 .udma_mask
= ATA_UDMA5
,
528 .port_ops
= &amd100_port_ops
531 const struct ata_port_info
*ppi
[] = { NULL
, NULL
};
532 int type
= id
->driver_data
;
537 ata_print_version_once(&pdev
->dev
, DRV_VERSION
);
539 rc
= pcim_enable_device(pdev
);
543 pci_read_config_byte(pdev
, 0x41, &fifo
);
545 /* Check for AMD7409 without swdma errata and if found adjust type */
546 if (type
== 1 && pdev
->revision
> 0x7)
550 if (type
== 5 && pdev
->subsystem_vendor
== PCI_VENDOR_ID_AMD
&&
551 pdev
->subsystem_device
== PCI_DEVICE_ID_AMD_SERENADE
)
552 type
= 6; /* UDMA 100 only */
555 * Okay, type is determined now. Apply type-specific workarounds.
557 ppi
[0] = &info
[type
];
560 ata_pci_bmdma_clear_simplex(pdev
);
561 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
)
562 amd_clear_fifo(pdev
);
563 /* Cable detection on Nvidia chips doesn't work too well,
564 * cache BIOS programmed UDMA mode.
566 if (type
== 7 || type
== 8) {
569 pci_read_config_dword(pdev
, 0x60, &udma
);
570 hpriv
= (void *)(unsigned long)udma
;
574 return ata_pci_bmdma_init_one(pdev
, ppi
, &amd_sht
, hpriv
, 0);
577 #ifdef CONFIG_PM_SLEEP
578 static int amd_reinit_one(struct pci_dev
*pdev
)
580 struct ata_host
*host
= pci_get_drvdata(pdev
);
583 rc
= ata_pci_device_do_resume(pdev
);
587 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
) {
588 amd_clear_fifo(pdev
);
589 if (pdev
->device
== PCI_DEVICE_ID_AMD_VIPER_7409
||
590 pdev
->device
== PCI_DEVICE_ID_AMD_COBRA_7401
)
591 ata_pci_bmdma_clear_simplex(pdev
);
593 ata_host_resume(host
);
598 static const struct pci_device_id amd
[] = {
599 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_COBRA_7401
), 0 },
600 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_VIPER_7409
), 1 },
601 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_VIPER_7411
), 3 },
602 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_OPUS_7441
), 4 },
603 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_8111_IDE
), 5 },
604 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_IDE
), 7 },
605 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE
), 8 },
606 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE
), 8 },
607 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE
), 8 },
608 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE
), 8 },
609 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE
), 8 },
610 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE
), 8 },
611 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE
), 8 },
612 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE
), 8 },
613 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE
), 8 },
614 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE
), 8 },
615 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE
), 8 },
616 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE
), 8 },
617 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE
), 8 },
618 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_CS5536_IDE
), 9 },
623 static struct pci_driver amd_pci_driver
= {
626 .probe
= amd_init_one
,
627 .remove
= ata_pci_remove_one
,
628 #ifdef CONFIG_PM_SLEEP
629 .suspend
= ata_pci_device_suspend
,
630 .resume
= amd_reinit_one
,
634 module_pci_driver(amd_pci_driver
);
636 MODULE_AUTHOR("Alan Cox");
637 MODULE_DESCRIPTION("low-level driver for AMD and Nvidia PATA IDE");
638 MODULE_LICENSE("GPL");
639 MODULE_DEVICE_TABLE(pci
, amd
);
640 MODULE_VERSION(DRV_VERSION
);