2 * Libata driver for the highpoint 37x and 30x UDMA66 ATA controllers.
4 * This driver is heavily based upon:
6 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
8 * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
9 * Portions Copyright (C) 2001 Sun Microsystems, Inc.
10 * Portions Copyright (C) 2003 Red Hat Inc
11 * Portions Copyright (C) 2005-2007 MontaVista Software, Inc.
14 * Look into engine reset on timeout errors. Should not be required.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/init.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_hpt37x"
27 #define DRV_VERSION "0.6.9"
37 struct hpt_clock const *clocks[4];
40 /* key for bus clock timings
42 * 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
43 * DMA. cycles = value + 1
44 * 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
45 * DMA. cycles = value + 1
46 * 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
48 * 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
50 * 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
51 * during task file register access.
52 * 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
54 * 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
58 * 30 PIO_MST enable. if set, the chip is in bus master mode during
63 static struct hpt_clock hpt37x_timings_33[] = {
64 { XFER_UDMA_6, 0x12446231 }, /* 0x12646231 ?? */
65 { XFER_UDMA_5, 0x12446231 },
66 { XFER_UDMA_4, 0x12446231 },
67 { XFER_UDMA_3, 0x126c6231 },
68 { XFER_UDMA_2, 0x12486231 },
69 { XFER_UDMA_1, 0x124c6233 },
70 { XFER_UDMA_0, 0x12506297 },
72 { XFER_MW_DMA_2, 0x22406c31 },
73 { XFER_MW_DMA_1, 0x22406c33 },
74 { XFER_MW_DMA_0, 0x22406c97 },
76 { XFER_PIO_4, 0x06414e31 },
77 { XFER_PIO_3, 0x06414e42 },
78 { XFER_PIO_2, 0x06414e53 },
79 { XFER_PIO_1, 0x06814e93 },
80 { XFER_PIO_0, 0x06814ea7 }
83 static struct hpt_clock hpt37x_timings_50[] = {
84 { XFER_UDMA_6, 0x12848242 },
85 { XFER_UDMA_5, 0x12848242 },
86 { XFER_UDMA_4, 0x12ac8242 },
87 { XFER_UDMA_3, 0x128c8242 },
88 { XFER_UDMA_2, 0x120c8242 },
89 { XFER_UDMA_1, 0x12148254 },
90 { XFER_UDMA_0, 0x121882ea },
92 { XFER_MW_DMA_2, 0x22808242 },
93 { XFER_MW_DMA_1, 0x22808254 },
94 { XFER_MW_DMA_0, 0x228082ea },
96 { XFER_PIO_4, 0x0a81f442 },
97 { XFER_PIO_3, 0x0a81f443 },
98 { XFER_PIO_2, 0x0a81f454 },
99 { XFER_PIO_1, 0x0ac1f465 },
100 { XFER_PIO_0, 0x0ac1f48a }
103 static struct hpt_clock hpt37x_timings_66[] = {
104 { XFER_UDMA_6, 0x1c869c62 },
105 { XFER_UDMA_5, 0x1cae9c62 }, /* 0x1c8a9c62 */
106 { XFER_UDMA_4, 0x1c8a9c62 },
107 { XFER_UDMA_3, 0x1c8e9c62 },
108 { XFER_UDMA_2, 0x1c929c62 },
109 { XFER_UDMA_1, 0x1c9a9c62 },
110 { XFER_UDMA_0, 0x1c829c62 },
112 { XFER_MW_DMA_2, 0x2c829c62 },
113 { XFER_MW_DMA_1, 0x2c829c66 },
114 { XFER_MW_DMA_0, 0x2c829d2e },
116 { XFER_PIO_4, 0x0c829c62 },
117 { XFER_PIO_3, 0x0c829c84 },
118 { XFER_PIO_2, 0x0c829ca6 },
119 { XFER_PIO_1, 0x0d029d26 },
120 { XFER_PIO_0, 0x0d029d5e }
124 static const struct hpt_chip hpt370 = {
135 static const struct hpt_chip hpt370a = {
146 static const struct hpt_chip hpt372 = {
157 static const struct hpt_chip hpt302 = {
168 static const struct hpt_chip hpt371 = {
179 static const struct hpt_chip hpt372a = {
190 static const struct hpt_chip hpt374 = {
202 * hpt37x_find_mode - reset the hpt37x bus
204 * @speed: transfer mode
206 * Return the 32bit register programming information for this channel
207 * that matches the speed provided.
210 static u32 hpt37x_find_mode(struct ata_port *ap, int speed)
212 struct hpt_clock *clocks = ap->host->private_data;
214 while(clocks->xfer_speed) {
215 if (clocks->xfer_speed == speed)
216 return clocks->timing;
220 return 0xffffffffU; /* silence compiler warning */
223 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
225 unsigned char model_num[ATA_ID_PROD_LEN + 1];
228 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
230 while (list[i] != NULL) {
231 if (!strcmp(list[i], model_num)) {
232 printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
241 static const char *bad_ata33[] = {
242 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
243 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
244 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
246 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
247 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
248 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
252 static const char *bad_ata100_5[] = {
272 * hpt370_filter - mode selection filter
275 * Block UDMA on devices that cause trouble with this controller.
278 static unsigned long hpt370_filter(struct ata_device *adev, unsigned long mask)
280 if (adev->class == ATA_DEV_ATA) {
281 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
282 mask &= ~ATA_MASK_UDMA;
283 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
284 mask &= ~(0x1F << ATA_SHIFT_UDMA);
286 return ata_pci_default_filter(adev, mask);
290 * hpt370a_filter - mode selection filter
293 * Block UDMA on devices that cause trouble with this controller.
296 static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
298 if (adev->class != ATA_DEV_ATA) {
299 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
300 mask &= ~ (0x1F << ATA_SHIFT_UDMA);
302 return ata_pci_default_filter(adev, mask);
306 * hpt37x_pre_reset - reset the hpt37x bus
307 * @link: ATA link to reset
308 * @deadline: deadline jiffies for the operation
310 * Perform the initial reset handling for the 370/372 and 374 func 0
313 static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
316 struct ata_port *ap = link->ap;
317 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
318 static const struct pci_bits hpt37x_enable_bits[] = {
319 { 0x50, 1, 0x04, 0x04 },
320 { 0x54, 1, 0x04, 0x04 }
322 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
325 pci_read_config_byte(pdev, 0x5B, &scr2);
326 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
327 /* Cable register now active */
328 pci_read_config_byte(pdev, 0x5A, &ata66);
330 pci_write_config_byte(pdev, 0x5B, scr2);
332 if (ata66 & (1 << ap->port_no))
333 ap->cbl = ATA_CBL_PATA40;
335 ap->cbl = ATA_CBL_PATA80;
337 /* Reset the state machine */
338 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
341 return ata_std_prereset(link, deadline);
345 * hpt37x_error_handler - reset the hpt374
346 * @ap: ATA port to reset
348 * Perform probe for HPT37x, except for HPT374 channel 2
351 static void hpt37x_error_handler(struct ata_port *ap)
353 ata_bmdma_drive_eh(ap, hpt37x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
356 static int hpt374_pre_reset(struct ata_link *link, unsigned long deadline)
358 static const struct pci_bits hpt37x_enable_bits[] = {
359 { 0x50, 1, 0x04, 0x04 },
360 { 0x54, 1, 0x04, 0x04 }
364 struct ata_port *ap = link->ap;
365 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
367 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
370 /* Do the extra channel work */
371 pci_read_config_word(pdev, 0x52, &mcr3);
372 pci_read_config_word(pdev, 0x56, &mcr6);
373 /* Set bit 15 of 0x52 to enable TCBLID as input
374 Set bit 15 of 0x56 to enable FCBLID as input
376 pci_write_config_word(pdev, 0x52, mcr3 | 0x8000);
377 pci_write_config_word(pdev, 0x56, mcr6 | 0x8000);
378 pci_read_config_byte(pdev, 0x5A, &ata66);
379 /* Reset TCBLID/FCBLID to output */
380 pci_write_config_word(pdev, 0x52, mcr3);
381 pci_write_config_word(pdev, 0x56, mcr6);
383 if (ata66 & (1 << ap->port_no))
384 ap->cbl = ATA_CBL_PATA40;
386 ap->cbl = ATA_CBL_PATA80;
388 /* Reset the state machine */
389 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
392 return ata_std_prereset(link, deadline);
396 * hpt374_error_handler - reset the hpt374
399 * The 374 cable detect is a little different due to the extra
400 * channels. The function 0 channels work like usual but function 1
404 static void hpt374_error_handler(struct ata_port *ap)
406 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
408 if (!(PCI_FUNC(pdev->devfn) & 1))
409 hpt37x_error_handler(ap);
411 ata_bmdma_drive_eh(ap, hpt374_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
415 * hpt370_set_piomode - PIO setup
417 * @adev: device on the interface
419 * Perform PIO mode setup.
422 static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev)
424 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
430 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
431 addr2 = 0x51 + 4 * ap->port_no;
433 /* Fast interrupt prediction disable, hold off interrupt disable */
434 pci_read_config_byte(pdev, addr2, &fast);
437 pci_write_config_byte(pdev, addr2, fast);
439 pci_read_config_dword(pdev, addr1, ®);
440 mode = hpt37x_find_mode(ap, adev->pio_mode);
441 mode &= ~0x8000000; /* No FIFO in PIO */
442 mode &= ~0x30070000; /* Leave config bits alone */
443 reg &= 0x30070000; /* Strip timing bits */
444 pci_write_config_dword(pdev, addr1, reg | mode);
448 * hpt370_set_dmamode - DMA timing setup
450 * @adev: Device being configured
452 * Set up the channel for MWDMA or UDMA modes. Much the same as with
453 * PIO, load the mode number and then set MWDMA or UDMA flag.
456 static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev)
458 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
464 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
465 addr2 = 0x51 + 4 * ap->port_no;
467 /* Fast interrupt prediction disable, hold off interrupt disable */
468 pci_read_config_byte(pdev, addr2, &fast);
471 pci_write_config_byte(pdev, addr2, fast);
473 pci_read_config_dword(pdev, addr1, ®);
474 mode = hpt37x_find_mode(ap, adev->dma_mode);
475 mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
476 mode &= ~0xC0000000; /* Leave config bits alone */
477 reg &= 0xC0000000; /* Strip timing bits */
478 pci_write_config_dword(pdev, addr1, reg | mode);
482 * hpt370_bmdma_start - DMA engine begin
485 * The 370 and 370A want us to reset the DMA engine each time we
486 * use it. The 372 and later are fine.
489 static void hpt370_bmdma_start(struct ata_queued_cmd *qc)
491 struct ata_port *ap = qc->ap;
492 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
493 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
499 * hpt370_bmdma_end - DMA engine stop
502 * Work around the HPT370 DMA engine.
505 static void hpt370_bmdma_stop(struct ata_queued_cmd *qc)
507 struct ata_port *ap = qc->ap;
508 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
509 u8 dma_stat = ioread8(ap->ioaddr.bmdma_addr + 2);
511 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
513 if (dma_stat & 0x01) {
515 dma_stat = ioread8(bmdma + 2);
517 if (dma_stat & 0x01) {
518 /* Clear the engine */
519 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
522 dma_cmd = ioread8(bmdma );
523 iowrite8(dma_cmd & 0xFE, bmdma);
525 dma_stat = ioread8(bmdma + 2);
526 iowrite8(dma_stat | 0x06 , bmdma + 2);
527 /* Clear the engine */
528 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
535 * hpt372_set_piomode - PIO setup
537 * @adev: device on the interface
539 * Perform PIO mode setup.
542 static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev)
544 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
550 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
551 addr2 = 0x51 + 4 * ap->port_no;
553 /* Fast interrupt prediction disable, hold off interrupt disable */
554 pci_read_config_byte(pdev, addr2, &fast);
556 pci_write_config_byte(pdev, addr2, fast);
558 pci_read_config_dword(pdev, addr1, ®);
559 mode = hpt37x_find_mode(ap, adev->pio_mode);
561 printk("Find mode for %d reports %X\n", adev->pio_mode, mode);
562 mode &= ~0x80000000; /* No FIFO in PIO */
563 mode &= ~0x30070000; /* Leave config bits alone */
564 reg &= 0x30070000; /* Strip timing bits */
565 pci_write_config_dword(pdev, addr1, reg | mode);
569 * hpt372_set_dmamode - DMA timing setup
571 * @adev: Device being configured
573 * Set up the channel for MWDMA or UDMA modes. Much the same as with
574 * PIO, load the mode number and then set MWDMA or UDMA flag.
577 static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev)
579 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
585 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
586 addr2 = 0x51 + 4 * ap->port_no;
588 /* Fast interrupt prediction disable, hold off interrupt disable */
589 pci_read_config_byte(pdev, addr2, &fast);
591 pci_write_config_byte(pdev, addr2, fast);
593 pci_read_config_dword(pdev, addr1, ®);
594 mode = hpt37x_find_mode(ap, adev->dma_mode);
595 printk("Find mode for DMA %d reports %X\n", adev->dma_mode, mode);
596 mode &= ~0xC0000000; /* Leave config bits alone */
597 mode |= 0x80000000; /* FIFO in MWDMA or UDMA */
598 reg &= 0xC0000000; /* Strip timing bits */
599 pci_write_config_dword(pdev, addr1, reg | mode);
603 * hpt37x_bmdma_end - DMA engine stop
606 * Clean up after the HPT372 and later DMA engine
609 static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc)
611 struct ata_port *ap = qc->ap;
612 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
613 int mscreg = 0x50 + 4 * ap->port_no;
614 u8 bwsr_stat, msc_stat;
616 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
617 pci_read_config_byte(pdev, mscreg, &msc_stat);
618 if (bwsr_stat & (1 << ap->port_no))
619 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
624 static struct scsi_host_template hpt37x_sht = {
625 .module = THIS_MODULE,
627 .ioctl = ata_scsi_ioctl,
628 .queuecommand = ata_scsi_queuecmd,
629 .can_queue = ATA_DEF_QUEUE,
630 .this_id = ATA_SHT_THIS_ID,
631 .sg_tablesize = LIBATA_MAX_PRD,
632 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
633 .emulated = ATA_SHT_EMULATED,
634 .use_clustering = ATA_SHT_USE_CLUSTERING,
635 .proc_name = DRV_NAME,
636 .dma_boundary = ATA_DMA_BOUNDARY,
637 .slave_configure = ata_scsi_slave_config,
638 .slave_destroy = ata_scsi_slave_destroy,
639 .bios_param = ata_std_bios_param,
643 * Configuration for HPT370
646 static struct ata_port_operations hpt370_port_ops = {
647 .port_disable = ata_port_disable,
648 .set_piomode = hpt370_set_piomode,
649 .set_dmamode = hpt370_set_dmamode,
650 .mode_filter = hpt370_filter,
652 .tf_load = ata_tf_load,
653 .tf_read = ata_tf_read,
654 .check_status = ata_check_status,
655 .exec_command = ata_exec_command,
656 .dev_select = ata_std_dev_select,
658 .freeze = ata_bmdma_freeze,
659 .thaw = ata_bmdma_thaw,
660 .error_handler = hpt37x_error_handler,
661 .post_internal_cmd = ata_bmdma_post_internal_cmd,
663 .bmdma_setup = ata_bmdma_setup,
664 .bmdma_start = hpt370_bmdma_start,
665 .bmdma_stop = hpt370_bmdma_stop,
666 .bmdma_status = ata_bmdma_status,
668 .qc_prep = ata_qc_prep,
669 .qc_issue = ata_qc_issue_prot,
671 .data_xfer = ata_data_xfer,
673 .irq_handler = ata_interrupt,
674 .irq_clear = ata_bmdma_irq_clear,
675 .irq_on = ata_irq_on,
676 .irq_ack = ata_irq_ack,
678 .port_start = ata_port_start,
682 * Configuration for HPT370A. Close to 370 but less filters
685 static struct ata_port_operations hpt370a_port_ops = {
686 .port_disable = ata_port_disable,
687 .set_piomode = hpt370_set_piomode,
688 .set_dmamode = hpt370_set_dmamode,
689 .mode_filter = hpt370a_filter,
691 .tf_load = ata_tf_load,
692 .tf_read = ata_tf_read,
693 .check_status = ata_check_status,
694 .exec_command = ata_exec_command,
695 .dev_select = ata_std_dev_select,
697 .freeze = ata_bmdma_freeze,
698 .thaw = ata_bmdma_thaw,
699 .error_handler = hpt37x_error_handler,
700 .post_internal_cmd = ata_bmdma_post_internal_cmd,
702 .bmdma_setup = ata_bmdma_setup,
703 .bmdma_start = hpt370_bmdma_start,
704 .bmdma_stop = hpt370_bmdma_stop,
705 .bmdma_status = ata_bmdma_status,
707 .qc_prep = ata_qc_prep,
708 .qc_issue = ata_qc_issue_prot,
710 .data_xfer = ata_data_xfer,
712 .irq_handler = ata_interrupt,
713 .irq_clear = ata_bmdma_irq_clear,
714 .irq_on = ata_irq_on,
715 .irq_ack = ata_irq_ack,
717 .port_start = ata_port_start,
721 * Configuration for HPT372, HPT371, HPT302. Slightly different PIO
722 * and DMA mode setting functionality.
725 static struct ata_port_operations hpt372_port_ops = {
726 .port_disable = ata_port_disable,
727 .set_piomode = hpt372_set_piomode,
728 .set_dmamode = hpt372_set_dmamode,
729 .mode_filter = ata_pci_default_filter,
731 .tf_load = ata_tf_load,
732 .tf_read = ata_tf_read,
733 .check_status = ata_check_status,
734 .exec_command = ata_exec_command,
735 .dev_select = ata_std_dev_select,
737 .freeze = ata_bmdma_freeze,
738 .thaw = ata_bmdma_thaw,
739 .error_handler = hpt37x_error_handler,
740 .post_internal_cmd = ata_bmdma_post_internal_cmd,
742 .bmdma_setup = ata_bmdma_setup,
743 .bmdma_start = ata_bmdma_start,
744 .bmdma_stop = hpt37x_bmdma_stop,
745 .bmdma_status = ata_bmdma_status,
747 .qc_prep = ata_qc_prep,
748 .qc_issue = ata_qc_issue_prot,
750 .data_xfer = ata_data_xfer,
752 .irq_handler = ata_interrupt,
753 .irq_clear = ata_bmdma_irq_clear,
754 .irq_on = ata_irq_on,
755 .irq_ack = ata_irq_ack,
757 .port_start = ata_port_start,
761 * Configuration for HPT374. Mode setting works like 372 and friends
762 * but we have a different cable detection procedure.
765 static struct ata_port_operations hpt374_port_ops = {
766 .port_disable = ata_port_disable,
767 .set_piomode = hpt372_set_piomode,
768 .set_dmamode = hpt372_set_dmamode,
769 .mode_filter = ata_pci_default_filter,
771 .tf_load = ata_tf_load,
772 .tf_read = ata_tf_read,
773 .check_status = ata_check_status,
774 .exec_command = ata_exec_command,
775 .dev_select = ata_std_dev_select,
777 .freeze = ata_bmdma_freeze,
778 .thaw = ata_bmdma_thaw,
779 .error_handler = hpt374_error_handler,
780 .post_internal_cmd = ata_bmdma_post_internal_cmd,
782 .bmdma_setup = ata_bmdma_setup,
783 .bmdma_start = ata_bmdma_start,
784 .bmdma_stop = hpt37x_bmdma_stop,
785 .bmdma_status = ata_bmdma_status,
787 .qc_prep = ata_qc_prep,
788 .qc_issue = ata_qc_issue_prot,
790 .data_xfer = ata_data_xfer,
792 .irq_handler = ata_interrupt,
793 .irq_clear = ata_bmdma_irq_clear,
794 .irq_on = ata_irq_on,
795 .irq_ack = ata_irq_ack,
797 .port_start = ata_port_start,
801 * htp37x_clock_slot - Turn timing to PC clock entry
802 * @freq: Reported frequency timing
805 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
809 static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
811 unsigned int f = (base * freq) / 192; /* Mhz */
813 return 0; /* 33Mhz slot */
815 return 1; /* 40Mhz slot */
817 return 2; /* 50Mhz slot */
818 return 3; /* 60Mhz slot */
822 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
825 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
829 static int hpt37x_calibrate_dpll(struct pci_dev *dev)
835 for(tries = 0; tries < 0x5000; tries++) {
837 pci_read_config_byte(dev, 0x5b, ®5b);
839 /* See if it stays set */
840 for(tries = 0; tries < 0x1000; tries ++) {
841 pci_read_config_byte(dev, 0x5b, ®5b);
843 if ((reg5b & 0x80) == 0)
846 /* Turn off tuning, we have the DPLL set */
847 pci_read_config_dword(dev, 0x5c, ®5c);
848 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
852 /* Never went stable */
856 * hpt37x_init_one - Initialise an HPT37X/302
858 * @id: Entry in match table
860 * Initialise an HPT37x device. There are some interesting complications
861 * here. Firstly the chip may report 366 and be one of several variants.
862 * Secondly all the timings depend on the clock for the chip which we must
865 * This is the known chip mappings. It may be missing a couple of later
868 * Chip version PCI Rev Notes
869 * HPT366 4 (HPT366) 0 Other driver
870 * HPT366 4 (HPT366) 1 Other driver
871 * HPT368 4 (HPT366) 2 Other driver
872 * HPT370 4 (HPT366) 3 UDMA100
873 * HPT370A 4 (HPT366) 4 UDMA100
874 * HPT372 4 (HPT366) 5 UDMA133 (1)
875 * HPT372N 4 (HPT366) 6 Other driver
876 * HPT372A 5 (HPT372) 1 UDMA133 (1)
877 * HPT372N 5 (HPT372) 2 Other driver
878 * HPT302 6 (HPT302) 1 UDMA133
879 * HPT302N 6 (HPT302) 2 Other driver
880 * HPT371 7 (HPT371) * UDMA133
881 * HPT374 8 (HPT374) * UDMA133 4 channel
882 * HPT372N 9 (HPT372N) * Other driver
884 * (1) UDMA133 support depends on the bus clock
887 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
889 /* HPT370 - UDMA100 */
890 static const struct ata_port_info info_hpt370 = {
892 .flags = ATA_FLAG_SLAVE_POSS,
895 .udma_mask = ATA_UDMA5,
896 .port_ops = &hpt370_port_ops
898 /* HPT370A - UDMA100 */
899 static const struct ata_port_info info_hpt370a = {
901 .flags = ATA_FLAG_SLAVE_POSS,
904 .udma_mask = ATA_UDMA5,
905 .port_ops = &hpt370a_port_ops
907 /* HPT370 - UDMA100 */
908 static const struct ata_port_info info_hpt370_33 = {
910 .flags = ATA_FLAG_SLAVE_POSS,
914 .port_ops = &hpt370_port_ops
916 /* HPT370A - UDMA100 */
917 static const struct ata_port_info info_hpt370a_33 = {
919 .flags = ATA_FLAG_SLAVE_POSS,
923 .port_ops = &hpt370a_port_ops
925 /* HPT371, 372 and friends - UDMA133 */
926 static const struct ata_port_info info_hpt372 = {
928 .flags = ATA_FLAG_SLAVE_POSS,
931 .udma_mask = ATA_UDMA6,
932 .port_ops = &hpt372_port_ops
934 /* HPT374 - UDMA100 */
935 static const struct ata_port_info info_hpt374 = {
937 .flags = ATA_FLAG_SLAVE_POSS,
940 .udma_mask = ATA_UDMA5,
941 .port_ops = &hpt374_port_ops
944 static const int MHz[4] = { 33, 40, 50, 66 };
945 const struct ata_port_info *port;
946 void *private_data = NULL;
947 struct ata_port_info port_info;
948 const struct ata_port_info *ppi[] = { &port_info, NULL };
956 unsigned long iobase = pci_resource_start(dev, 4);
958 const struct hpt_chip *chip_table;
961 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
964 if (dev->device == PCI_DEVICE_ID_TTI_HPT366) {
965 /* May be a later chip in disguise. Check */
966 /* Older chips are in the HPT366 driver. Ignore them */
969 /* N series chips have their own driver. Ignore */
976 chip_table = &hpt370;
980 port = &info_hpt370a;
981 chip_table = &hpt370a;
986 chip_table = &hpt372;
989 printk(KERN_ERR "pata_hpt37x: Unknown HPT366 subtype please report (%d).\n", class_rev);
993 switch(dev->device) {
994 case PCI_DEVICE_ID_TTI_HPT372:
995 /* 372N if rev >= 2*/
999 chip_table = &hpt372a;
1001 case PCI_DEVICE_ID_TTI_HPT302:
1002 /* 302N if rev > 1 */
1005 port = &info_hpt372;
1007 chip_table = &hpt302;
1009 case PCI_DEVICE_ID_TTI_HPT371:
1012 port = &info_hpt372;
1013 chip_table = &hpt371;
1014 /* Single channel device, master is not present
1015 but the BIOS (or us for non x86) must mark it
1017 pci_read_config_byte(dev, 0x50, &mcr1);
1019 pci_write_config_byte(dev, 0x50, mcr1);
1021 case PCI_DEVICE_ID_TTI_HPT374:
1022 chip_table = &hpt374;
1023 port = &info_hpt374;
1026 printk(KERN_ERR "pata_hpt37x: PCI table is bogus please report (%d).\n", dev->device);
1030 /* Ok so this is a chip we support */
1032 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
1033 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
1034 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
1035 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
1037 pci_read_config_byte(dev, 0x5A, &irqmask);
1039 pci_write_config_byte(dev, 0x5a, irqmask);
1042 * default to pci clock. make sure MA15/16 are set to output
1043 * to prevent drives having problems with 40-pin cables. Needed
1044 * for some drives such as IBM-DTLA which will not enter ready
1045 * state on reset when PDIAG is a input.
1048 pci_write_config_byte(dev, 0x5b, 0x23);
1051 * HighPoint does this for HPT372A.
1052 * NOTE: This register is only writeable via I/O space.
1054 if (chip_table == &hpt372a)
1055 outb(0x0e, iobase + 0x9c);
1057 /* Some devices do not let this value be accessed via PCI space
1058 according to the old driver */
1060 freq = inl(iobase + 0x90);
1061 if ((freq >> 12) != 0xABCDE) {
1066 printk(KERN_WARNING "pata_hpt37x: BIOS has not set timing clocks.\n");
1068 /* This is the process the HPT371 BIOS is reported to use */
1069 for(i = 0; i < 128; i++) {
1070 pci_read_config_byte(dev, 0x78, &sr);
1071 total += sr & 0x1FF;
1079 * Turn the frequency check into a band and then find a timing
1080 * table to match it.
1083 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
1084 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
1086 * We need to try PLL mode instead
1088 * For non UDMA133 capable devices we should
1089 * use a 50MHz DPLL by choice
1091 unsigned int f_low, f_high;
1095 dpll = (port->udma_mask & 0xC0) ? 3 : 2;
1097 f_low = (MHz[clock_slot] * 48) / MHz[dpll];
1102 /* Select the DPLL clock. */
1103 pci_write_config_byte(dev, 0x5b, 0x21);
1104 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1106 for(adjust = 0; adjust < 8; adjust++) {
1107 if (hpt37x_calibrate_dpll(dev))
1109 /* See if it'll settle at a fractionally different clock */
1111 f_low -= adjust >> 1;
1113 f_high += adjust >> 1;
1114 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1117 printk(KERN_ERR "pata_hpt37x: DPLL did not stabilize!\n");
1121 private_data = (void *)hpt37x_timings_66;
1123 private_data = (void *)hpt37x_timings_50;
1125 printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using %dMHz DPLL.\n",
1126 MHz[clock_slot], MHz[dpll]);
1128 private_data = (void *)chip_table->clocks[clock_slot];
1130 * Perform a final fixup. Note that we will have used the
1131 * DPLL on the HPT372 which means we don't have to worry
1132 * about lack of UDMA133 support on lower clocks
1135 if (clock_slot < 2 && port == &info_hpt370)
1136 port = &info_hpt370_33;
1137 if (clock_slot < 2 && port == &info_hpt370a)
1138 port = &info_hpt370a_33;
1139 printk(KERN_INFO "pata_hpt37x: %s using %dMHz bus clock.\n",
1140 chip_table->name, MHz[clock_slot]);
1143 /* Now kick off ATA set up */
1145 port_info.private_data = private_data;
1147 return ata_pci_init_one(dev, ppi);
1150 static const struct pci_device_id hpt37x[] = {
1151 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1152 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1153 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1154 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1155 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1160 static struct pci_driver hpt37x_pci_driver = {
1163 .probe = hpt37x_init_one,
1164 .remove = ata_pci_remove_one
1167 static int __init hpt37x_init(void)
1169 return pci_register_driver(&hpt37x_pci_driver);
1172 static void __exit hpt37x_exit(void)
1174 pci_unregister_driver(&hpt37x_pci_driver);
1177 MODULE_AUTHOR("Alan Cox");
1178 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1179 MODULE_LICENSE("GPL");
1180 MODULE_DEVICE_TABLE(pci, hpt37x);
1181 MODULE_VERSION(DRV_VERSION);
1183 module_init(hpt37x_init);
1184 module_exit(hpt37x_exit);