2 * pata_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 "0.4.2"
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_cable_detect - cable detection
142 * @deadline: deadline jiffies for the operation
144 * Perform cable detection according to the device and subvendor
148 static int serverworks_cable_detect(struct ata_port
*ap
)
150 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
151 struct sv_cable_table
*cb
= cable_detect
;
154 if (cb
->device
== pdev
->device
&&
155 (cb
->subvendor
== pdev
->subsystem_vendor
||
156 cb
->subvendor
== PCI_ANY_ID
)) {
157 return cb
->cable_detect(ap
);
163 return -1; /* kill compiler warning */
167 * serverworks_is_csb - Check for CSB or OSB
168 * @pdev: PCI device to check
170 * Returns true if the device being checked is known to be a CSB
174 static u8
serverworks_is_csb(struct pci_dev
*pdev
)
176 switch (pdev
->device
) {
177 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
:
178 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
:
179 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
:
180 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
:
189 * serverworks_osb4_filter - mode selection filter
191 * @mask: Mask of proposed modes
193 * Filter the offered modes for the device to apply controller
194 * specific rules. OSB4 requires no UDMA for disks due to a FIFO
198 static unsigned int serverworks_osb4_filter(struct ata_device
*adev
, unsigned int mask
)
200 if (adev
->class == ATA_DEV_ATA
)
201 mask
&= ~ATA_MASK_UDMA
;
202 return ata_pci_default_filter(adev
, mask
);
207 * serverworks_csb_filter - mode selection filter
209 * @mask: Mask of proposed modes
211 * Check the blacklist and disable UDMA5 if matched
214 static unsigned int serverworks_csb_filter(struct ata_device
*adev
, unsigned int mask
)
217 char model_num
[ATA_ID_PROD_LEN
+ 1];
221 if (adev
->class != ATA_DEV_ATA
)
222 return ata_pci_default_filter(adev
, mask
);
224 /* Actually do need to check */
225 ata_id_c_string(adev
->id
, model_num
, ATA_ID_PROD
, sizeof(model_num
));
227 for (i
= 0; (p
= csb_bad_ata100
[i
]) != NULL
; i
++) {
228 if (!strcmp(p
, model_num
))
229 mask
&= ~(0x1F << ATA_SHIFT_UDMA
);
231 return ata_pci_default_filter(adev
, mask
);
236 * serverworks_set_piomode - set initial PIO mode data
240 * Program the OSB4/CSB5 timing registers for PIO. The PIO register
241 * load is done as a simple lookup.
243 static void serverworks_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
245 static const u8 pio_mode
[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
246 int offset
= 1 + (2 * ap
->port_no
) - adev
->devno
;
247 int devbits
= (2 * ap
->port_no
+ adev
->devno
) * 4;
249 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
250 int pio
= adev
->pio_mode
- XFER_PIO_0
;
252 pci_write_config_byte(pdev
, 0x40 + offset
, pio_mode
[pio
]);
254 /* The OSB4 just requires the timing but the CSB series want the
255 mode number as well */
256 if (serverworks_is_csb(pdev
)) {
257 pci_read_config_word(pdev
, 0x4A, &csb5_pio
);
258 csb5_pio
&= ~(0x0F << devbits
);
259 pci_write_config_byte(pdev
, 0x4A, csb5_pio
| (pio
<< devbits
));
264 * serverworks_set_dmamode - set initial DMA mode data
268 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
269 * chipset. The MWDMA mode values are pulled from a lookup table
270 * while the chipset uses mode number for UDMA.
273 static void serverworks_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
275 static const u8 dma_mode
[] = { 0x77, 0x21, 0x20 };
276 int offset
= 1 + 2 * ap
->port_no
- adev
->devno
;
277 int devbits
= 2 * ap
->port_no
+ adev
->devno
;
280 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
282 pci_read_config_byte(pdev
, 0x54, &ultra_cfg
);
283 pci_read_config_byte(pdev
, 0x56 + ap
->port_no
, &ultra
);
284 ultra
&= ~(0x0F << (adev
->devno
* 4));
286 if (adev
->dma_mode
>= XFER_UDMA_0
) {
287 pci_write_config_byte(pdev
, 0x44 + offset
, 0x20);
289 ultra
|= (adev
->dma_mode
- XFER_UDMA_0
)
290 << (adev
->devno
* 4);
291 ultra_cfg
|= (1 << devbits
);
293 pci_write_config_byte(pdev
, 0x44 + offset
,
294 dma_mode
[adev
->dma_mode
- XFER_MW_DMA_0
]);
295 ultra_cfg
&= ~(1 << devbits
);
297 pci_write_config_byte(pdev
, 0x56 + ap
->port_no
, ultra
);
298 pci_write_config_byte(pdev
, 0x54, ultra_cfg
);
301 static struct scsi_host_template serverworks_sht
= {
302 .module
= THIS_MODULE
,
304 .ioctl
= ata_scsi_ioctl
,
305 .queuecommand
= ata_scsi_queuecmd
,
306 .can_queue
= ATA_DEF_QUEUE
,
307 .this_id
= ATA_SHT_THIS_ID
,
308 .sg_tablesize
= LIBATA_MAX_PRD
,
309 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
310 .emulated
= ATA_SHT_EMULATED
,
311 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
312 .proc_name
= DRV_NAME
,
313 .dma_boundary
= ATA_DMA_BOUNDARY
,
314 .slave_configure
= ata_scsi_slave_config
,
315 .slave_destroy
= ata_scsi_slave_destroy
,
316 .bios_param
= ata_std_bios_param
,
319 static struct ata_port_operations serverworks_osb4_port_ops
= {
320 .set_piomode
= serverworks_set_piomode
,
321 .set_dmamode
= serverworks_set_dmamode
,
322 .mode_filter
= serverworks_osb4_filter
,
324 .tf_load
= ata_tf_load
,
325 .tf_read
= ata_tf_read
,
326 .check_status
= ata_check_status
,
327 .exec_command
= ata_exec_command
,
328 .dev_select
= ata_std_dev_select
,
330 .freeze
= ata_bmdma_freeze
,
331 .thaw
= ata_bmdma_thaw
,
332 .error_handler
= ata_bmdma_error_handler
,
333 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
334 .cable_detect
= serverworks_cable_detect
,
336 .bmdma_setup
= ata_bmdma_setup
,
337 .bmdma_start
= ata_bmdma_start
,
338 .bmdma_stop
= ata_bmdma_stop
,
339 .bmdma_status
= ata_bmdma_status
,
341 .qc_prep
= ata_qc_prep
,
342 .qc_issue
= ata_qc_issue_prot
,
344 .data_xfer
= ata_data_xfer
,
346 .irq_handler
= ata_interrupt
,
347 .irq_clear
= ata_bmdma_irq_clear
,
348 .irq_on
= ata_irq_on
,
350 .port_start
= ata_sff_port_start
,
353 static struct ata_port_operations serverworks_csb_port_ops
= {
354 .set_piomode
= serverworks_set_piomode
,
355 .set_dmamode
= serverworks_set_dmamode
,
356 .mode_filter
= serverworks_csb_filter
,
358 .tf_load
= ata_tf_load
,
359 .tf_read
= ata_tf_read
,
360 .check_status
= ata_check_status
,
361 .exec_command
= ata_exec_command
,
362 .dev_select
= ata_std_dev_select
,
364 .freeze
= ata_bmdma_freeze
,
365 .thaw
= ata_bmdma_thaw
,
366 .error_handler
= ata_bmdma_error_handler
,
367 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
368 .cable_detect
= serverworks_cable_detect
,
370 .bmdma_setup
= ata_bmdma_setup
,
371 .bmdma_start
= ata_bmdma_start
,
372 .bmdma_stop
= ata_bmdma_stop
,
373 .bmdma_status
= ata_bmdma_status
,
375 .qc_prep
= ata_qc_prep
,
376 .qc_issue
= ata_qc_issue_prot
,
378 .data_xfer
= ata_data_xfer
,
380 .irq_handler
= ata_interrupt
,
381 .irq_clear
= ata_bmdma_irq_clear
,
382 .irq_on
= ata_irq_on
,
384 .port_start
= ata_sff_port_start
,
387 static int serverworks_fixup_osb4(struct pci_dev
*pdev
)
390 struct pci_dev
*isa_dev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
391 PCI_DEVICE_ID_SERVERWORKS_OSB4
, NULL
);
393 pci_read_config_dword(isa_dev
, 0x64, ®
);
394 reg
&= ~0x00002000; /* disable 600ns interrupt mask */
395 if (!(reg
& 0x00004000))
396 printk(KERN_DEBUG DRV_NAME
": UDMA not BIOS enabled.\n");
397 reg
|= 0x00004000; /* enable UDMA/33 support */
398 pci_write_config_dword(isa_dev
, 0x64, reg
);
399 pci_dev_put(isa_dev
);
402 printk(KERN_WARNING
"ata_serverworks: Unable to find bridge.\n");
406 static int serverworks_fixup_csb(struct pci_dev
*pdev
)
410 /* Third Channel Test */
411 if (!(PCI_FUNC(pdev
->devfn
) & 1)) {
412 struct pci_dev
* findev
= NULL
;
414 findev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
415 PCI_DEVICE_ID_SERVERWORKS_CSB5
, NULL
);
417 pci_read_config_dword(findev
, 0x4C, ®4c
);
418 reg4c
&= ~0x000007FF;
421 pci_write_config_dword(findev
, 0x4C, reg4c
);
425 struct pci_dev
* findev
= NULL
;
428 findev
= pci_get_device(PCI_VENDOR_ID_SERVERWORKS
,
429 PCI_DEVICE_ID_SERVERWORKS_CSB6
, NULL
);
431 pci_read_config_byte(findev
, 0x41, ®41
);
433 pci_write_config_byte(findev
, 0x41, reg41
);
437 /* setup the UDMA Control register
439 * 1. clear bit 6 to enable DMA
440 * 2. enable DMA modes with bits 0-1
444 * 11 : udma2/udma4/udma5
446 pci_read_config_byte(pdev
, 0x5A, &btr
);
448 if (!(PCI_FUNC(pdev
->devfn
) & 1))
451 btr
|= (pdev
->revision
>= SVWKS_CSB5_REVISION_NEW
) ? 0x3 : 0x2;
452 pci_write_config_byte(pdev
, 0x5A, btr
);
457 static void serverworks_fixup_ht1000(struct pci_dev
*pdev
)
460 /* Setup HT1000 SouthBridge Controller - Single Channel Only */
461 pci_read_config_byte(pdev
, 0x5A, &btr
);
464 pci_write_config_byte(pdev
, 0x5A, btr
);
468 static int serverworks_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
470 static const struct ata_port_info info
[4] = {
472 .sht
= &serverworks_sht
,
473 .flags
= ATA_FLAG_SLAVE_POSS
,
477 .port_ops
= &serverworks_osb4_port_ops
478 }, { /* OSB4 no UDMA */
479 .sht
= &serverworks_sht
,
480 .flags
= ATA_FLAG_SLAVE_POSS
,
484 .port_ops
= &serverworks_osb4_port_ops
486 .sht
= &serverworks_sht
,
487 .flags
= ATA_FLAG_SLAVE_POSS
,
490 .udma_mask
= ATA_UDMA4
,
491 .port_ops
= &serverworks_csb_port_ops
492 }, { /* CSB5 - later revisions*/
493 .sht
= &serverworks_sht
,
494 .flags
= ATA_FLAG_SLAVE_POSS
,
497 .udma_mask
= ATA_UDMA5
,
498 .port_ops
= &serverworks_csb_port_ops
501 const struct ata_port_info
*ppi
[] = { &info
[id
->driver_data
], NULL
};
503 /* Force master latency timer to 64 PCI clocks */
504 pci_write_config_byte(pdev
, PCI_LATENCY_TIMER
, 0x40);
506 /* OSB4 : South Bridge and IDE */
507 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
) {
508 /* Select non UDMA capable OSB4 if we can't do fixups */
509 if ( serverworks_fixup_osb4(pdev
) < 0)
512 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
513 else if ((pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
) ||
514 (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
) ||
515 (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
)) {
517 /* If the returned btr is the newer revision then
518 select the right info block */
519 if (serverworks_fixup_csb(pdev
) == 3)
522 /* Is this the 3rd channel CSB6 IDE ? */
523 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
)
524 ppi
[1] = &ata_dummy_port_info
;
527 else if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
)
528 serverworks_fixup_ht1000(pdev
);
530 if (pdev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
)
531 ata_pci_clear_simplex(pdev
);
533 return ata_pci_init_one(pdev
, ppi
);
537 static int serverworks_reinit_one(struct pci_dev
*pdev
)
539 /* Force master latency timer to 64 PCI clocks */
540 pci_write_config_byte(pdev
, PCI_LATENCY_TIMER
, 0x40);
542 switch (pdev
->device
)
544 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
:
545 serverworks_fixup_osb4(pdev
);
547 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
:
548 ata_pci_clear_simplex(pdev
);
550 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
:
551 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
:
552 serverworks_fixup_csb(pdev
);
554 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
:
555 serverworks_fixup_ht1000(pdev
);
558 return ata_pci_device_resume(pdev
);
562 static const struct pci_device_id serverworks
[] = {
563 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE
), 0},
564 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
), 2},
565 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE
), 2},
566 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2
), 2},
567 { PCI_VDEVICE(SERVERWORKS
, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE
), 2},
572 static struct pci_driver serverworks_pci_driver
= {
574 .id_table
= serverworks
,
575 .probe
= serverworks_init_one
,
576 .remove
= ata_pci_remove_one
,
578 .suspend
= ata_pci_device_suspend
,
579 .resume
= serverworks_reinit_one
,
583 static int __init
serverworks_init(void)
585 return pci_register_driver(&serverworks_pci_driver
);
588 static void __exit
serverworks_exit(void)
590 pci_unregister_driver(&serverworks_pci_driver
);
593 MODULE_AUTHOR("Alan Cox");
594 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
595 MODULE_LICENSE("GPL");
596 MODULE_DEVICE_TABLE(pci
, serverworks
);
597 MODULE_VERSION(DRV_VERSION
);
599 module_init(serverworks_init
);
600 module_exit(serverworks_exit
);