2 * ata-serverworks.c - Serverworks PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
10 * Copyright (C) 1998-2000 Michel Aubry
11 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
12 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
13 * Portions copyright (c) 2001 Sun Microsystems
16 * RCC/ServerWorks IDE driver for Linux
18 * OSB4: `Open South Bridge' IDE Interface (fn 1)
19 * supports UDMA mode 2 (33 MB/s)
21 * CSB5: `Champion South Bridge' IDE Interface (fn 1)
22 * all revisions support UDMA mode 4 (66 MB/s)
23 * revision A2.0 and up support UDMA mode 5 (100 MB/s)
25 * *** The CSB5 does not provide ANY register ***
26 * *** to detect 80-conductor cable presence. ***
28 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
31 * Available under NDA only. Errata info very hard to get.
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/init.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <scsi/scsi_host.h>
41 #include <linux/libata.h>
43 #define DRV_NAME "pata_serverworks"
44 #define DRV_VERSION "0.3.9"
46 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
47 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
49 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
50 * can overrun their FIFOs when used with the CSB5 */
52 static const char *csb_bad_ata100
[] = {
61 * dell_cable - Dell serverworks cable detection
62 * @ap: ATA port to do cable detect
64 * Dell hide the 40/80 pin select for their interfaces in the top two
65 * bits of the subsystem ID.
68 static int dell_cable(struct ata_port
*ap
) {
69 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
71 if (pdev
->subsystem_device
& (1 << (ap
->port_no
+ 14)))
72 return ATA_CBL_PATA80
;
73 return ATA_CBL_PATA40
;
77 * sun_cable - Sun Cobalt 'Alpine' cable detection
78 * @ap: ATA port to do cable select
80 * Cobalt CSB5 IDE hides the 40/80pin in the top two bits of the
81 * subsystem ID the same as dell. We could use one function but we may
82 * need to extend the Dell one in future
85 static int sun_cable(struct ata_port
*ap
) {
86 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
88 if (pdev
->subsystem_device
& (1 << (ap
->port_no
+ 14)))
89 return ATA_CBL_PATA80
;
90 return ATA_CBL_PATA40
;
94 * osb4_cable - OSB4 cable detect
95 * @ap: ATA port to check
97 * The OSB4 isn't UDMA66 capable so this is easy
100 static int osb4_cable(struct ata_port
*ap
) {
101 return ATA_CBL_PATA40
;
105 * csb4_cable - CSB5/6 cable detect
106 * @ap: ATA port to check
108 * Serverworks default arrangement is to use the drive side detection
112 static int csb_cable(struct ata_port
*ap
) {
113 return ATA_CBL_PATA80
;
116 struct sv_cable_table
{
119 int (*cable_detect
)(struct ata_port
*ap
);
123 * Note that we don't copy the old serverworks code because the old
124 * code contains obvious mistakes
127 static struct sv_cable_table cable_detect
[] = {
128 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
, PCI_VENDOR_ID_DELL
, dell_cable
},
129 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
, PCI_VENDOR_ID_DELL
, dell_cable
},
130 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
, PCI_VENDOR_ID_SUN
, sun_cable
},
131 { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
, PCI_ANY_ID
, osb4_cable
},
132 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
, PCI_ANY_ID
, csb_cable
},
133 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
, PCI_ANY_ID
, csb_cable
},
134 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
, PCI_ANY_ID
, csb_cable
},
135 { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
, PCI_ANY_ID
, csb_cable
},
140 * serverworks_pre_reset - cable detection
143 * Perform cable detection according to the device and subvendor
147 static int serverworks_pre_reset(struct ata_port
*ap
) {
148 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
149 struct sv_cable_table
*cb
= cable_detect
;
152 if (cb
->device
== pdev
->device
&&
153 (cb
->subvendor
== pdev
->subsystem_vendor
||
154 cb
->subvendor
== PCI_ANY_ID
)) {
155 ap
->cbl
= cb
->cable_detect(ap
);
156 return ata_std_prereset(ap
);
162 return -1; /* kill compiler warning */
165 static void serverworks_error_handler(struct ata_port
*ap
)
167 return ata_bmdma_drive_eh(ap
, serverworks_pre_reset
, ata_std_softreset
, NULL
, ata_std_postreset
);
171 * serverworks_is_csb - Check for CSB or OSB
172 * @pdev: PCI device to check
174 * Returns true if the device being checked is known to be a CSB
178 static u8
serverworks_is_csb(struct pci_dev
*pdev
)
180 switch (pdev
->device
) {
181 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
:
182 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
:
183 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
:
184 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
:
193 * serverworks_osb4_filter - mode selection filter
197 * Filter the offered modes for the device to apply controller
198 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
202 static unsigned long serverworks_osb4_filter(const struct ata_port
*ap
, struct ata_device
*adev
, unsigned long mask
)
204 if (adev
->class == ATA_DEV_ATA
)
205 mask
&= ~ATA_MASK_UDMA
;
206 return ata_pci_default_filter(ap
, adev
, mask
);
211 * serverworks_csb_filter - mode selection filter
215 * Check the blacklist and disable UDMA5 if matched
218 static unsigned long serverworks_csb_filter(const struct ata_port
*ap
, struct ata_device
*adev
, unsigned long mask
)
225 if (adev
->class != ATA_DEV_ATA
)
226 return ata_pci_default_filter(ap
, adev
, mask
);
228 /* Actually do need to check */
229 ata_id_string(adev
->id
, model_num
, ATA_ID_PROD_OFS
, sizeof(model_num
));
230 /* Precuationary - why not do this in the libata core ?? */
232 len
= strlen(model_num
);
233 while ((len
> 0) && (model_num
[len
- 1] == ' ')) {
238 for(i
= 0; (p
= csb_bad_ata100
[i
]) != NULL
; i
++) {
239 if (!strncmp(p
, model_num
, len
))
240 mask
&= ~(0x1F << ATA_SHIFT_UDMA
);
242 return ata_pci_default_filter(ap
, adev
, mask
);
247 * serverworks_set_piomode - set initial PIO mode data
251 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
252 * load is done as a simple lookup.
254 static void serverworks_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
256 static const u8 pio_mode
[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
257 int offset
= 1 + (2 * ap
->port_no
) - adev
->devno
;
258 int devbits
= (2 * ap
->port_no
+ adev
->devno
) * 4;
260 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
261 int pio
= adev
->pio_mode
- XFER_PIO_0
;
263 pci_write_config_byte(pdev
, 0x40 + offset
, pio_mode
[pio
]);
265 /* The OSB4 just requires the timing but the CSB series want the
266 mode number as well */
267 if (serverworks_is_csb(pdev
)) {
268 pci_read_config_word(pdev
, 0x4A, &csb5_pio
);
269 csb5_pio
&= ~(0x0F << devbits
);
270 pci_write_config_byte(pdev
, 0x4A, csb5_pio
| (pio
<< devbits
));
275 * serverworks_set_dmamode - set initial DMA mode data
279 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
280 * chipset. The MWDMA mode values are pulled from a lookup table
281 * while the chipset uses mode number for UDMA.
284 static void serverworks_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
286 static const u8 dma_mode
[] = { 0x77, 0x21, 0x20 };
287 int offset
= 1 + 2 * ap
->port_no
- adev
->devno
;
288 int devbits
= (2 * ap
->port_no
+ adev
->devno
);
291 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
293 pci_read_config_byte(pdev
, 0x54, &ultra_cfg
);
295 if (adev
->dma_mode
>= XFER_UDMA_0
) {
296 pci_write_config_byte(pdev
, 0x44 + offset
, 0x20);
298 pci_read_config_byte(pdev
, 0x56 + ap
->port_no
, &ultra
);
299 ultra
&= ~(0x0F << (ap
->port_no
* 4));
300 ultra
|= (adev
->dma_mode
- XFER_UDMA_0
)
301 << (ap
->port_no
* 4);
302 pci_write_config_byte(pdev
, 0x56 + ap
->port_no
, ultra
);
304 ultra_cfg
|= (1 << devbits
);
306 pci_write_config_byte(pdev
, 0x44 + offset
,
307 dma_mode
[adev
->dma_mode
- XFER_MW_DMA_0
]);
308 ultra_cfg
&= ~(1 << devbits
);
310 pci_write_config_byte(pdev
, 0x54, ultra_cfg
);
313 static struct scsi_host_template serverworks_sht
= {
314 .module
= THIS_MODULE
,
316 .ioctl
= ata_scsi_ioctl
,
317 .queuecommand
= ata_scsi_queuecmd
,
318 .can_queue
= ATA_DEF_QUEUE
,
319 .this_id
= ATA_SHT_THIS_ID
,
320 .sg_tablesize
= LIBATA_MAX_PRD
,
321 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
322 .emulated
= ATA_SHT_EMULATED
,
323 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
324 .proc_name
= DRV_NAME
,
325 .dma_boundary
= ATA_DMA_BOUNDARY
,
326 .slave_configure
= ata_scsi_slave_config
,
327 .slave_destroy
= ata_scsi_slave_destroy
,
328 .bios_param
= ata_std_bios_param
,
329 .resume
= ata_scsi_device_resume
,
330 .suspend
= ata_scsi_device_suspend
,
333 static struct ata_port_operations serverworks_osb4_port_ops
= {
334 .port_disable
= ata_port_disable
,
335 .set_piomode
= serverworks_set_piomode
,
336 .set_dmamode
= serverworks_set_dmamode
,
337 .mode_filter
= serverworks_osb4_filter
,
339 .tf_load
= ata_tf_load
,
340 .tf_read
= ata_tf_read
,
341 .check_status
= ata_check_status
,
342 .exec_command
= ata_exec_command
,
343 .dev_select
= ata_std_dev_select
,
345 .freeze
= ata_bmdma_freeze
,
346 .thaw
= ata_bmdma_thaw
,
347 .error_handler
= serverworks_error_handler
,
348 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
350 .bmdma_setup
= ata_bmdma_setup
,
351 .bmdma_start
= ata_bmdma_start
,
352 .bmdma_stop
= ata_bmdma_stop
,
353 .bmdma_status
= ata_bmdma_status
,
355 .qc_prep
= ata_qc_prep
,
356 .qc_issue
= ata_qc_issue_prot
,
358 .data_xfer
= ata_pio_data_xfer
,
360 .irq_handler
= ata_interrupt
,
361 .irq_clear
= ata_bmdma_irq_clear
,
363 .port_start
= ata_port_start
,
364 .port_stop
= ata_port_stop
,
365 .host_stop
= ata_host_stop
368 static struct ata_port_operations serverworks_csb_port_ops
= {
369 .port_disable
= ata_port_disable
,
370 .set_piomode
= serverworks_set_piomode
,
371 .set_dmamode
= serverworks_set_dmamode
,
372 .mode_filter
= serverworks_csb_filter
,
374 .tf_load
= ata_tf_load
,
375 .tf_read
= ata_tf_read
,
376 .check_status
= ata_check_status
,
377 .exec_command
= ata_exec_command
,
378 .dev_select
= ata_std_dev_select
,
380 .freeze
= ata_bmdma_freeze
,
381 .thaw
= ata_bmdma_thaw
,
382 .error_handler
= serverworks_error_handler
,
383 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
385 .bmdma_setup
= ata_bmdma_setup
,
386 .bmdma_start
= ata_bmdma_start
,
387 .bmdma_stop
= ata_bmdma_stop
,
388 .bmdma_status
= ata_bmdma_status
,
390 .qc_prep
= ata_qc_prep
,
391 .qc_issue
= ata_qc_issue_prot
,
393 .data_xfer
= ata_pio_data_xfer
,
395 .irq_handler
= ata_interrupt
,
396 .irq_clear
= ata_bmdma_irq_clear
,
398 .port_start
= ata_port_start
,
399 .port_stop
= ata_port_stop
,
400 .host_stop
= ata_host_stop
403 static int serverworks_fixup_osb4(struct pci_dev
*pdev
)
406 struct pci_dev
*isa_dev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
407 PCI_DEVICE_ID_SERVERWORKS_OSB4
, NULL
);
409 pci_read_config_dword(isa_dev
, 0x64, ®
);
410 reg
&= ~0x00002000; /* disable 600ns interrupt mask */
411 if (!(reg
& 0x00004000))
412 printk(KERN_DEBUG DRV_NAME
": UDMA not BIOS enabled.\n");
413 reg
|= 0x00004000; /* enable UDMA/33 support */
414 pci_write_config_dword(isa_dev
, 0x64, reg
);
415 pci_dev_put(isa_dev
);
418 printk(KERN_WARNING
"ata_serverworks: Unable to find bridge.\n");
422 static int serverworks_fixup_csb(struct pci_dev
*pdev
)
427 pci_read_config_byte(pdev
, PCI_REVISION_ID
, &rev
);
429 /* Third Channel Test */
430 if (!(PCI_FUNC(pdev
->devfn
) & 1)) {
431 struct pci_dev
* findev
= NULL
;
433 findev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
434 PCI_DEVICE_ID_SERVERWORKS_CSB5
, NULL
);
436 pci_read_config_dword(findev
, 0x4C, ®4c
);
437 reg4c
&= ~0x000007FF;
440 pci_write_config_dword(findev
, 0x4C, reg4c
);
444 struct pci_dev
* findev
= NULL
;
447 findev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
448 PCI_DEVICE_ID_SERVERWORKS_CSB6
, NULL
);
450 pci_read_config_byte(findev
, 0x41, ®41
);
452 pci_write_config_byte(findev
, 0x41, reg41
);
456 /* setup the UDMA Control register
458 * 1. clear bit 6 to enable DMA
459 * 2. enable DMA modes with bits 0-1
463 * 11 : udma2/udma4/udma5
465 pci_read_config_byte(pdev
, 0x5A, &btr
);
467 if (!(PCI_FUNC(pdev
->devfn
) & 1))
470 btr
|= (rev
>= SVWKS_CSB5_REVISION_NEW
) ? 0x3 : 0x2;
471 pci_write_config_byte(pdev
, 0x5A, btr
);
476 static void serverworks_fixup_ht1000(struct pci_dev
*pdev
)
479 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
480 pci_read_config_byte(pdev
, 0x5A, &btr
);
483 pci_write_config_byte(pdev
, 0x5A, btr
);
487 static int serverworks_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
490 static struct ata_port_info info
[4] = {
492 .sht
= &serverworks_sht
,
493 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
497 .port_ops
= &serverworks_osb4_port_ops
498 }, { /* OSB4 no UDMA */
499 .sht
= &serverworks_sht
,
500 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
504 .port_ops
= &serverworks_osb4_port_ops
506 .sht
= &serverworks_sht
,
507 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
511 .port_ops
= &serverworks_csb_port_ops
512 }, { /* CSB5 - later revisions*/
513 .sht
= &serverworks_sht
,
514 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
518 .port_ops
= &serverworks_csb_port_ops
521 static struct ata_port_info
*port_info
[2];
522 struct ata_port_info
*devinfo
= &info
[id
->driver_data
];
524 /* Force master latency timer to 64 PCI clocks */
525 pci_write_config_byte(pdev
, PCI_LATENCY_TIMER
, 0x40);
527 /* OSB4 : South Bridge and IDE */
528 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
) {
529 /* Select non UDMA capable OSB4 if we can't do fixups */
530 if ( serverworks_fixup_osb4(pdev
) < 0)
533 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
534 else if ((pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
) ||
535 (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
) ||
536 (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
)) {
538 /* If the returned btr is the newer revision then
539 select the right info block */
540 if (serverworks_fixup_csb(pdev
) == 3)
543 /* Is this the 3rd channel CSB6 IDE ? */
544 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
)
548 else if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
)
549 serverworks_fixup_ht1000(pdev
);
551 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
)
552 ata_pci_clear_simplex(pdev
);
554 port_info
[0] = port_info
[1] = devinfo
;
555 return ata_pci_init_one(pdev
, port_info
, ports
);
558 static int serverworks_reinit_one(struct pci_dev
*pdev
)
560 /* Force master latency timer to 64 PCI clocks */
561 pci_write_config_byte(pdev
, PCI_LATENCY_TIMER
, 0x40);
563 switch (pdev
->device
)
565 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
:
566 serverworks_fixup_osb4(pdev
);
568 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
:
569 ata_pci_clear_simplex(pdev
);
571 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
:
572 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
:
573 serverworks_fixup_csb(pdev
);
575 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
:
576 serverworks_fixup_ht1000(pdev
);
579 return ata_pci_device_resume(pdev
);
582 static const struct pci_device_id serverworks
[] = {
583 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
), 0},
584 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
), 2},
585 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
), 2},
586 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
), 2},
587 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
), 2},
592 static struct pci_driver serverworks_pci_driver
= {
594 .id_table
= serverworks
,
595 .probe
= serverworks_init_one
,
596 .remove
= ata_pci_remove_one
,
597 .suspend
= ata_pci_device_suspend
,
598 .resume
= serverworks_reinit_one
,
601 static int __init
serverworks_init(void)
603 return pci_register_driver(&serverworks_pci_driver
);
606 static void __exit
serverworks_exit(void)
608 pci_unregister_driver(&serverworks_pci_driver
);
611 MODULE_AUTHOR("Alan Cox");
612 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
613 MODULE_LICENSE("GPL");
614 MODULE_DEVICE_TABLE(pci
, serverworks
);
615 MODULE_VERSION(DRV_VERSION
);
617 module_init(serverworks_init
);
618 module_exit(serverworks_exit
);