1 // SPDX-License-Identifier: GPL-2.0-only
3 * pata_amd.c - AMD PATA for new ATA layer
4 * (C) 2005-2006 Red Hat Inc
6 * Based on pata-sil680. Errata information is taken from data sheets
7 * and the amd74xx.c driver by Vojtech Pavlik. Nvidia SATA devices are
8 * claimed by sata-nv.c.
11 * Variable system clock when/if it makes sense
12 * Power management on ports
15 * Documentation publicly available.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/pci.h>
21 #include <linux/blkdev.h>
22 #include <linux/delay.h>
23 #include <scsi/scsi_host.h>
24 #include <linux/libata.h>
26 #define DRV_NAME "pata_amd"
27 #define DRV_VERSION "0.4.1"
30 * timing_setup - shared timing computation and load
31 * @ap: ATA port being set up
32 * @adev: drive being configured
33 * @offset: port offset
34 * @speed: target speed
35 * @clock: clock multiplier (number of times 33MHz for this part)
37 * Perform the actual timing set up for Nvidia or AMD PATA devices.
38 * The actual devices vary so they all call into this helper function
39 * providing the clock multipler and offset (because AMD and Nvidia put
40 * the ports at different locations).
43 static void timing_setup(struct ata_port
*ap
, struct ata_device
*adev
, int offset
, int speed
, int clock
)
45 static const unsigned char amd_cyc2udma
[] = {
46 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7
49 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
50 struct ata_device
*peer
= ata_dev_pair(adev
);
51 int dn
= ap
->port_no
* 2 + adev
->devno
;
52 struct ata_timing at
, apeer
;
54 const int amd_clock
= 33333; /* KHz. */
57 T
= 1000000000 / amd_clock
;
62 if (ata_timing_compute(adev
, speed
, &at
, T
, UT
) < 0) {
63 dev_err(&pdev
->dev
, "unknown mode %d\n", speed
);
68 /* This may be over conservative */
70 ata_timing_compute(peer
, peer
->dma_mode
, &apeer
, T
, UT
);
71 ata_timing_merge(&apeer
, &at
, &at
, ATA_TIMING_8BIT
);
73 ata_timing_compute(peer
, peer
->pio_mode
, &apeer
, T
, UT
);
74 ata_timing_merge(&apeer
, &at
, &at
, ATA_TIMING_8BIT
);
77 if (speed
== XFER_UDMA_5
&& amd_clock
<= 33333) at
.udma
= 1;
78 if (speed
== XFER_UDMA_6
&& amd_clock
<= 33333) at
.udma
= 15;
81 * Now do the setup work
84 /* Configure the address set up timing */
85 pci_read_config_byte(pdev
, offset
+ 0x0C, &t
);
86 t
= (t
& ~(3 << ((3 - dn
) << 1))) | ((clamp_val(at
.setup
, 1, 4) - 1) << ((3 - dn
) << 1));
87 pci_write_config_byte(pdev
, offset
+ 0x0C , t
);
89 /* Configure the 8bit I/O timing */
90 pci_write_config_byte(pdev
, offset
+ 0x0E + (1 - (dn
>> 1)),
91 ((clamp_val(at
.act8b
, 1, 16) - 1) << 4) | (clamp_val(at
.rec8b
, 1, 16) - 1));
94 pci_write_config_byte(pdev
, offset
+ 0x08 + (3 - dn
),
95 ((clamp_val(at
.active
, 1, 16) - 1) << 4) | (clamp_val(at
.recover
, 1, 16) - 1));
99 t
= at
.udma
? (0xc0 | (clamp_val(at
.udma
, 2, 5) - 2)) : 0x03;
103 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 2, 10)]) : 0x03;
107 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 1, 10)]) : 0x03;
111 t
= at
.udma
? (0xc0 | amd_cyc2udma
[clamp_val(at
.udma
, 1, 15)]) : 0x03;
120 pci_write_config_byte(pdev
, offset
+ 0x10 + (3 - dn
), t
);
124 * amd_pre_reset - perform reset handling
126 * @deadline: deadline jiffies for the operation
128 * Reset sequence checking enable bits to see which ports are
132 static int amd_pre_reset(struct ata_link
*link
, unsigned long deadline
)
134 static const struct pci_bits amd_enable_bits
[] = {
135 { 0x40, 1, 0x02, 0x02 },
136 { 0x40, 1, 0x01, 0x01 }
139 struct ata_port
*ap
= link
->ap
;
140 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
142 if (!pci_test_config_bits(pdev
, &amd_enable_bits
[ap
->port_no
]))
145 return ata_sff_prereset(link
, deadline
);
149 * amd_cable_detect - report cable type
152 * AMD controller/BIOS setups record the cable type in word 0x42
155 static int amd_cable_detect(struct ata_port
*ap
)
157 static const u32 bitmask
[2] = {0x03, 0x0C};
158 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
161 pci_read_config_byte(pdev
, 0x42, &ata66
);
162 if (ata66
& bitmask
[ap
->port_no
])
163 return ATA_CBL_PATA80
;
164 return ATA_CBL_PATA40
;
168 * amd_fifo_setup - set the PIO FIFO for ATA/ATAPI
172 * Set the PCI fifo for this device according to the devices present
173 * on the bus at this point in time. We need to turn the post write buffer
174 * off for ATAPI devices as we may need to issue a word sized write to the
175 * device as the final I/O
178 static void amd_fifo_setup(struct ata_port
*ap
)
180 struct ata_device
*adev
;
181 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
182 static const u8 fifobit
[2] = { 0xC0, 0x30};
183 u8 fifo
= fifobit
[ap
->port_no
];
187 ata_for_each_dev(adev
, &ap
->link
, ENABLED
) {
188 if (adev
->class == ATA_DEV_ATAPI
)
191 if (pdev
->device
== PCI_DEVICE_ID_AMD_VIPER_7411
) /* FIFO is broken */
194 /* On the later chips the read prefetch bits become no-op bits */
195 pci_read_config_byte(pdev
, 0x41, &r
);
196 r
&= ~fifobit
[ap
->port_no
];
198 pci_write_config_byte(pdev
, 0x41, r
);
202 * amd33_set_piomode - set initial PIO mode data
206 * Program the AMD registers for PIO mode.
209 static void amd33_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
212 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 1);
215 static void amd66_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
218 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 2);
221 static void amd100_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
224 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 3);
227 static void amd133_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
230 timing_setup(ap
, adev
, 0x40, adev
->pio_mode
, 4);
234 * amd33_set_dmamode - set initial DMA mode data
238 * Program the MWDMA/UDMA modes for the AMD and Nvidia
242 static void amd33_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
244 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 1);
247 static void amd66_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
249 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 2);
252 static void amd100_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
254 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 3);
257 static void amd133_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
259 timing_setup(ap
, adev
, 0x40, adev
->dma_mode
, 4);
262 /* Both host-side and drive-side detection results are worthless on NV
263 * PATAs. Ignore them and just follow what BIOS configured. Both the
264 * current configuration in PCI config reg and ACPI GTM result are
265 * cached during driver attach and are consulted to select transfer
268 static unsigned long nv_mode_filter(struct ata_device
*dev
,
269 unsigned long xfer_mask
)
271 static const unsigned int udma_mask_map
[] =
272 { ATA_UDMA2
, ATA_UDMA1
, ATA_UDMA0
, 0,
273 ATA_UDMA3
, ATA_UDMA4
, ATA_UDMA5
, ATA_UDMA6
};
274 struct ata_port
*ap
= dev
->link
->ap
;
275 char acpi_str
[32] = "";
276 u32 saved_udma
, udma
;
277 const struct ata_acpi_gtm
*gtm
;
278 unsigned long bios_limit
= 0, acpi_limit
= 0, limit
;
280 /* find out what BIOS configured */
281 udma
= saved_udma
= (unsigned long)ap
->host
->private_data
;
283 if (ap
->port_no
== 0)
288 if ((udma
& 0xc0) == 0xc0)
289 bios_limit
= ata_pack_xfermask(0, 0, udma_mask_map
[udma
& 0x7]);
291 /* consult ACPI GTM too */
292 gtm
= ata_acpi_init_gtm(ap
);
294 acpi_limit
= ata_acpi_gtm_xfermask(dev
, gtm
);
296 snprintf(acpi_str
, sizeof(acpi_str
), " (%u:%u:0x%x)",
297 gtm
->drive
[0].dma
, gtm
->drive
[1].dma
, gtm
->flags
);
300 /* be optimistic, EH can take care of things if something goes wrong */
301 limit
= bios_limit
| acpi_limit
;
303 /* If PIO or DMA isn't configured at all, don't limit. Let EH
306 if (!(limit
& ATA_MASK_PIO
))
307 limit
|= ATA_MASK_PIO
;
308 if (!(limit
& (ATA_MASK_MWDMA
| ATA_MASK_UDMA
)))
309 limit
|= ATA_MASK_MWDMA
| ATA_MASK_UDMA
;
310 /* PIO4, MWDMA2, UDMA2 should always be supported regardless of
311 cable detection result */
312 limit
|= ata_pack_xfermask(ATA_PIO4
, ATA_MWDMA2
, ATA_UDMA2
);
314 ata_port_dbg(ap
, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, "
315 "BIOS=0x%lx (0x%x) ACPI=0x%lx%s\n",
316 xfer_mask
, limit
, xfer_mask
& limit
, bios_limit
,
317 saved_udma
, acpi_limit
, acpi_str
);
319 return xfer_mask
& limit
;
323 * nv_probe_init - cable detection
326 * Perform cable detection. The BIOS stores this in PCI config
330 static int nv_pre_reset(struct ata_link
*link
, unsigned long deadline
)
332 static const struct pci_bits nv_enable_bits
[] = {
333 { 0x50, 1, 0x02, 0x02 },
334 { 0x50, 1, 0x01, 0x01 }
337 struct ata_port
*ap
= link
->ap
;
338 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
340 if (!pci_test_config_bits(pdev
, &nv_enable_bits
[ap
->port_no
]))
343 return ata_sff_prereset(link
, deadline
);
347 * nv100_set_piomode - set initial PIO mode data
351 * Program the AMD registers for PIO mode.
354 static void nv100_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
356 timing_setup(ap
, adev
, 0x50, adev
->pio_mode
, 3);
359 static void nv133_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
361 timing_setup(ap
, adev
, 0x50, adev
->pio_mode
, 4);
365 * nv100_set_dmamode - set initial DMA mode data
369 * Program the MWDMA/UDMA modes for the AMD and Nvidia
373 static void nv100_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
375 timing_setup(ap
, adev
, 0x50, adev
->dma_mode
, 3);
378 static void nv133_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
380 timing_setup(ap
, adev
, 0x50, adev
->dma_mode
, 4);
383 static void nv_host_stop(struct ata_host
*host
)
385 u32 udma
= (unsigned long)host
->private_data
;
387 /* restore PCI config register 0x60 */
388 pci_write_config_dword(to_pci_dev(host
->dev
), 0x60, udma
);
391 static struct scsi_host_template amd_sht
= {
392 ATA_BMDMA_SHT(DRV_NAME
),
395 static const struct ata_port_operations amd_base_port_ops
= {
396 .inherits
= &ata_bmdma32_port_ops
,
397 .prereset
= amd_pre_reset
,
400 static struct ata_port_operations amd33_port_ops
= {
401 .inherits
= &amd_base_port_ops
,
402 .cable_detect
= ata_cable_40wire
,
403 .set_piomode
= amd33_set_piomode
,
404 .set_dmamode
= amd33_set_dmamode
,
407 static struct ata_port_operations amd66_port_ops
= {
408 .inherits
= &amd_base_port_ops
,
409 .cable_detect
= ata_cable_unknown
,
410 .set_piomode
= amd66_set_piomode
,
411 .set_dmamode
= amd66_set_dmamode
,
414 static struct ata_port_operations amd100_port_ops
= {
415 .inherits
= &amd_base_port_ops
,
416 .cable_detect
= ata_cable_unknown
,
417 .set_piomode
= amd100_set_piomode
,
418 .set_dmamode
= amd100_set_dmamode
,
421 static struct ata_port_operations amd133_port_ops
= {
422 .inherits
= &amd_base_port_ops
,
423 .cable_detect
= amd_cable_detect
,
424 .set_piomode
= amd133_set_piomode
,
425 .set_dmamode
= amd133_set_dmamode
,
428 static const struct ata_port_operations nv_base_port_ops
= {
429 .inherits
= &ata_bmdma_port_ops
,
430 .cable_detect
= ata_cable_ignore
,
431 .mode_filter
= nv_mode_filter
,
432 .prereset
= nv_pre_reset
,
433 .host_stop
= nv_host_stop
,
436 static struct ata_port_operations nv100_port_ops
= {
437 .inherits
= &nv_base_port_ops
,
438 .set_piomode
= nv100_set_piomode
,
439 .set_dmamode
= nv100_set_dmamode
,
442 static struct ata_port_operations nv133_port_ops
= {
443 .inherits
= &nv_base_port_ops
,
444 .set_piomode
= nv133_set_piomode
,
445 .set_dmamode
= nv133_set_dmamode
,
448 static void amd_clear_fifo(struct pci_dev
*pdev
)
451 /* Disable the FIFO, the FIFO logic will re-enable it as
453 pci_read_config_byte(pdev
, 0x41, &fifo
);
455 pci_write_config_byte(pdev
, 0x41, fifo
);
458 static int amd_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
460 static const struct ata_port_info info
[10] = {
461 { /* 0: AMD 7401 - no swdma */
462 .flags
= ATA_FLAG_SLAVE_POSS
,
463 .pio_mask
= ATA_PIO4
,
464 .mwdma_mask
= ATA_MWDMA2
,
465 .udma_mask
= ATA_UDMA2
,
466 .port_ops
= &amd33_port_ops
468 { /* 1: Early AMD7409 - no swdma */
469 .flags
= ATA_FLAG_SLAVE_POSS
,
470 .pio_mask
= ATA_PIO4
,
471 .mwdma_mask
= ATA_MWDMA2
,
472 .udma_mask
= ATA_UDMA4
,
473 .port_ops
= &amd66_port_ops
476 .flags
= ATA_FLAG_SLAVE_POSS
,
477 .pio_mask
= ATA_PIO4
,
478 .mwdma_mask
= ATA_MWDMA2
,
479 .udma_mask
= ATA_UDMA4
,
480 .port_ops
= &amd66_port_ops
483 .flags
= ATA_FLAG_SLAVE_POSS
,
484 .pio_mask
= ATA_PIO4
,
485 .mwdma_mask
= ATA_MWDMA2
,
486 .udma_mask
= ATA_UDMA5
,
487 .port_ops
= &amd100_port_ops
490 .flags
= ATA_FLAG_SLAVE_POSS
,
491 .pio_mask
= ATA_PIO4
,
492 .mwdma_mask
= ATA_MWDMA2
,
493 .udma_mask
= ATA_UDMA5
,
494 .port_ops
= &amd100_port_ops
496 { /* 5: AMD 8111 - no swdma */
497 .flags
= ATA_FLAG_SLAVE_POSS
,
498 .pio_mask
= ATA_PIO4
,
499 .mwdma_mask
= ATA_MWDMA2
,
500 .udma_mask
= ATA_UDMA6
,
501 .port_ops
= &amd133_port_ops
503 { /* 6: AMD 8111 UDMA 100 (Serenade) - no swdma */
504 .flags
= ATA_FLAG_SLAVE_POSS
,
505 .pio_mask
= ATA_PIO4
,
506 .mwdma_mask
= ATA_MWDMA2
,
507 .udma_mask
= ATA_UDMA5
,
508 .port_ops
= &amd133_port_ops
510 { /* 7: Nvidia Nforce */
511 .flags
= ATA_FLAG_SLAVE_POSS
,
512 .pio_mask
= ATA_PIO4
,
513 .mwdma_mask
= ATA_MWDMA2
,
514 .udma_mask
= ATA_UDMA5
,
515 .port_ops
= &nv100_port_ops
517 { /* 8: Nvidia Nforce2 and later - no swdma */
518 .flags
= ATA_FLAG_SLAVE_POSS
,
519 .pio_mask
= ATA_PIO4
,
520 .mwdma_mask
= ATA_MWDMA2
,
521 .udma_mask
= ATA_UDMA6
,
522 .port_ops
= &nv133_port_ops
524 { /* 9: AMD CS5536 (Geode companion) */
525 .flags
= ATA_FLAG_SLAVE_POSS
,
526 .pio_mask
= ATA_PIO4
,
527 .mwdma_mask
= ATA_MWDMA2
,
528 .udma_mask
= ATA_UDMA5
,
529 .port_ops
= &amd100_port_ops
532 const struct ata_port_info
*ppi
[] = { NULL
, NULL
};
533 int type
= id
->driver_data
;
538 ata_print_version_once(&pdev
->dev
, DRV_VERSION
);
540 rc
= pcim_enable_device(pdev
);
544 pci_read_config_byte(pdev
, 0x41, &fifo
);
546 /* Check for AMD7409 without swdma errata and if found adjust type */
547 if (type
== 1 && pdev
->revision
> 0x7)
551 if (type
== 5 && pdev
->subsystem_vendor
== PCI_VENDOR_ID_AMD
&&
552 pdev
->subsystem_device
== PCI_DEVICE_ID_AMD_SERENADE
)
553 type
= 6; /* UDMA 100 only */
556 * Okay, type is determined now. Apply type-specific workarounds.
558 ppi
[0] = &info
[type
];
561 ata_pci_bmdma_clear_simplex(pdev
);
562 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
)
563 amd_clear_fifo(pdev
);
564 /* Cable detection on Nvidia chips doesn't work too well,
565 * cache BIOS programmed UDMA mode.
567 if (type
== 7 || type
== 8) {
570 pci_read_config_dword(pdev
, 0x60, &udma
);
571 hpriv
= (void *)(unsigned long)udma
;
575 return ata_pci_bmdma_init_one(pdev
, ppi
, &amd_sht
, hpriv
, 0);
578 #ifdef CONFIG_PM_SLEEP
579 static int amd_reinit_one(struct pci_dev
*pdev
)
581 struct ata_host
*host
= pci_get_drvdata(pdev
);
584 rc
= ata_pci_device_do_resume(pdev
);
588 if (pdev
->vendor
== PCI_VENDOR_ID_AMD
) {
589 amd_clear_fifo(pdev
);
590 if (pdev
->device
== PCI_DEVICE_ID_AMD_VIPER_7409
||
591 pdev
->device
== PCI_DEVICE_ID_AMD_COBRA_7401
)
592 ata_pci_bmdma_clear_simplex(pdev
);
594 ata_host_resume(host
);
599 static const struct pci_device_id amd
[] = {
600 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_COBRA_7401
), 0 },
601 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_VIPER_7409
), 1 },
602 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_VIPER_7411
), 3 },
603 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_OPUS_7441
), 4 },
604 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_8111_IDE
), 5 },
605 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_IDE
), 7 },
606 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE
), 8 },
607 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE
), 8 },
608 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE
), 8 },
609 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE
), 8 },
610 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE
), 8 },
611 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE
), 8 },
612 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE
), 8 },
613 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE
), 8 },
614 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE
), 8 },
615 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE
), 8 },
616 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE
), 8 },
617 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE
), 8 },
618 { PCI_VDEVICE(NVIDIA
, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE
), 8 },
619 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_CS5536_IDE
), 9 },
620 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_CS5536_DEV_IDE
), 9 },
625 static struct pci_driver amd_pci_driver
= {
628 .probe
= amd_init_one
,
629 .remove
= ata_pci_remove_one
,
630 #ifdef CONFIG_PM_SLEEP
631 .suspend
= ata_pci_device_suspend
,
632 .resume
= amd_reinit_one
,
636 module_pci_driver(amd_pci_driver
);
638 MODULE_AUTHOR("Alan Cox");
639 MODULE_DESCRIPTION("low-level driver for AMD and Nvidia PATA IDE");
640 MODULE_LICENSE("GPL");
641 MODULE_DEVICE_TABLE(pci
, amd
);
642 MODULE_VERSION(DRV_VERSION
);