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 .set_piomode = hpt370_set_piomode,
648 .set_dmamode = hpt370_set_dmamode,
649 .mode_filter = hpt370_filter,
651 .tf_load = ata_tf_load,
652 .tf_read = ata_tf_read,
653 .check_status = ata_check_status,
654 .exec_command = ata_exec_command,
655 .dev_select = ata_std_dev_select,
657 .freeze = ata_bmdma_freeze,
658 .thaw = ata_bmdma_thaw,
659 .error_handler = hpt37x_error_handler,
660 .post_internal_cmd = ata_bmdma_post_internal_cmd,
662 .bmdma_setup = ata_bmdma_setup,
663 .bmdma_start = hpt370_bmdma_start,
664 .bmdma_stop = hpt370_bmdma_stop,
665 .bmdma_status = ata_bmdma_status,
667 .qc_prep = ata_qc_prep,
668 .qc_issue = ata_qc_issue_prot,
670 .data_xfer = ata_data_xfer,
672 .irq_handler = ata_interrupt,
673 .irq_clear = ata_bmdma_irq_clear,
674 .irq_on = ata_irq_on,
676 .port_start = ata_sff_port_start,
680 * Configuration for HPT370A. Close to 370 but less filters
683 static struct ata_port_operations hpt370a_port_ops = {
684 .set_piomode = hpt370_set_piomode,
685 .set_dmamode = hpt370_set_dmamode,
686 .mode_filter = hpt370a_filter,
688 .tf_load = ata_tf_load,
689 .tf_read = ata_tf_read,
690 .check_status = ata_check_status,
691 .exec_command = ata_exec_command,
692 .dev_select = ata_std_dev_select,
694 .freeze = ata_bmdma_freeze,
695 .thaw = ata_bmdma_thaw,
696 .error_handler = hpt37x_error_handler,
697 .post_internal_cmd = ata_bmdma_post_internal_cmd,
699 .bmdma_setup = ata_bmdma_setup,
700 .bmdma_start = hpt370_bmdma_start,
701 .bmdma_stop = hpt370_bmdma_stop,
702 .bmdma_status = ata_bmdma_status,
704 .qc_prep = ata_qc_prep,
705 .qc_issue = ata_qc_issue_prot,
707 .data_xfer = ata_data_xfer,
709 .irq_handler = ata_interrupt,
710 .irq_clear = ata_bmdma_irq_clear,
711 .irq_on = ata_irq_on,
713 .port_start = ata_sff_port_start,
717 * Configuration for HPT372, HPT371, HPT302. Slightly different PIO
718 * and DMA mode setting functionality.
721 static struct ata_port_operations hpt372_port_ops = {
722 .set_piomode = hpt372_set_piomode,
723 .set_dmamode = hpt372_set_dmamode,
724 .mode_filter = ata_pci_default_filter,
726 .tf_load = ata_tf_load,
727 .tf_read = ata_tf_read,
728 .check_status = ata_check_status,
729 .exec_command = ata_exec_command,
730 .dev_select = ata_std_dev_select,
732 .freeze = ata_bmdma_freeze,
733 .thaw = ata_bmdma_thaw,
734 .error_handler = hpt37x_error_handler,
735 .post_internal_cmd = ata_bmdma_post_internal_cmd,
737 .bmdma_setup = ata_bmdma_setup,
738 .bmdma_start = ata_bmdma_start,
739 .bmdma_stop = hpt37x_bmdma_stop,
740 .bmdma_status = ata_bmdma_status,
742 .qc_prep = ata_qc_prep,
743 .qc_issue = ata_qc_issue_prot,
745 .data_xfer = ata_data_xfer,
747 .irq_handler = ata_interrupt,
748 .irq_clear = ata_bmdma_irq_clear,
749 .irq_on = ata_irq_on,
751 .port_start = ata_sff_port_start,
755 * Configuration for HPT374. Mode setting works like 372 and friends
756 * but we have a different cable detection procedure.
759 static struct ata_port_operations hpt374_port_ops = {
760 .set_piomode = hpt372_set_piomode,
761 .set_dmamode = hpt372_set_dmamode,
762 .mode_filter = ata_pci_default_filter,
764 .tf_load = ata_tf_load,
765 .tf_read = ata_tf_read,
766 .check_status = ata_check_status,
767 .exec_command = ata_exec_command,
768 .dev_select = ata_std_dev_select,
770 .freeze = ata_bmdma_freeze,
771 .thaw = ata_bmdma_thaw,
772 .error_handler = hpt374_error_handler,
773 .post_internal_cmd = ata_bmdma_post_internal_cmd,
775 .bmdma_setup = ata_bmdma_setup,
776 .bmdma_start = ata_bmdma_start,
777 .bmdma_stop = hpt37x_bmdma_stop,
778 .bmdma_status = ata_bmdma_status,
780 .qc_prep = ata_qc_prep,
781 .qc_issue = ata_qc_issue_prot,
783 .data_xfer = ata_data_xfer,
785 .irq_handler = ata_interrupt,
786 .irq_clear = ata_bmdma_irq_clear,
787 .irq_on = ata_irq_on,
789 .port_start = ata_sff_port_start,
793 * htp37x_clock_slot - Turn timing to PC clock entry
794 * @freq: Reported frequency timing
797 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
801 static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
803 unsigned int f = (base * freq) / 192; /* Mhz */
805 return 0; /* 33Mhz slot */
807 return 1; /* 40Mhz slot */
809 return 2; /* 50Mhz slot */
810 return 3; /* 60Mhz slot */
814 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
817 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
821 static int hpt37x_calibrate_dpll(struct pci_dev *dev)
827 for(tries = 0; tries < 0x5000; tries++) {
829 pci_read_config_byte(dev, 0x5b, ®5b);
831 /* See if it stays set */
832 for(tries = 0; tries < 0x1000; tries ++) {
833 pci_read_config_byte(dev, 0x5b, ®5b);
835 if ((reg5b & 0x80) == 0)
838 /* Turn off tuning, we have the DPLL set */
839 pci_read_config_dword(dev, 0x5c, ®5c);
840 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
844 /* Never went stable */
848 * hpt37x_init_one - Initialise an HPT37X/302
850 * @id: Entry in match table
852 * Initialise an HPT37x device. There are some interesting complications
853 * here. Firstly the chip may report 366 and be one of several variants.
854 * Secondly all the timings depend on the clock for the chip which we must
857 * This is the known chip mappings. It may be missing a couple of later
860 * Chip version PCI Rev Notes
861 * HPT366 4 (HPT366) 0 Other driver
862 * HPT366 4 (HPT366) 1 Other driver
863 * HPT368 4 (HPT366) 2 Other driver
864 * HPT370 4 (HPT366) 3 UDMA100
865 * HPT370A 4 (HPT366) 4 UDMA100
866 * HPT372 4 (HPT366) 5 UDMA133 (1)
867 * HPT372N 4 (HPT366) 6 Other driver
868 * HPT372A 5 (HPT372) 1 UDMA133 (1)
869 * HPT372N 5 (HPT372) 2 Other driver
870 * HPT302 6 (HPT302) 1 UDMA133
871 * HPT302N 6 (HPT302) 2 Other driver
872 * HPT371 7 (HPT371) * UDMA133
873 * HPT374 8 (HPT374) * UDMA133 4 channel
874 * HPT372N 9 (HPT372N) * Other driver
876 * (1) UDMA133 support depends on the bus clock
879 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
881 /* HPT370 - UDMA100 */
882 static const struct ata_port_info info_hpt370 = {
884 .flags = ATA_FLAG_SLAVE_POSS,
887 .udma_mask = ATA_UDMA5,
888 .port_ops = &hpt370_port_ops
890 /* HPT370A - UDMA100 */
891 static const struct ata_port_info info_hpt370a = {
893 .flags = ATA_FLAG_SLAVE_POSS,
896 .udma_mask = ATA_UDMA5,
897 .port_ops = &hpt370a_port_ops
899 /* HPT370 - UDMA100 */
900 static const struct ata_port_info info_hpt370_33 = {
902 .flags = ATA_FLAG_SLAVE_POSS,
906 .port_ops = &hpt370_port_ops
908 /* HPT370A - UDMA100 */
909 static const struct ata_port_info info_hpt370a_33 = {
911 .flags = ATA_FLAG_SLAVE_POSS,
915 .port_ops = &hpt370a_port_ops
917 /* HPT371, 372 and friends - UDMA133 */
918 static const struct ata_port_info info_hpt372 = {
920 .flags = ATA_FLAG_SLAVE_POSS,
923 .udma_mask = ATA_UDMA6,
924 .port_ops = &hpt372_port_ops
926 /* HPT374 - UDMA100 */
927 static const struct ata_port_info info_hpt374 = {
929 .flags = ATA_FLAG_SLAVE_POSS,
932 .udma_mask = ATA_UDMA5,
933 .port_ops = &hpt374_port_ops
936 static const int MHz[4] = { 33, 40, 50, 66 };
937 const struct ata_port_info *port;
938 void *private_data = NULL;
939 struct ata_port_info port_info;
940 const struct ata_port_info *ppi[] = { &port_info, NULL };
948 unsigned long iobase = pci_resource_start(dev, 4);
950 const struct hpt_chip *chip_table;
953 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
956 if (dev->device == PCI_DEVICE_ID_TTI_HPT366) {
957 /* May be a later chip in disguise. Check */
958 /* Older chips are in the HPT366 driver. Ignore them */
961 /* N series chips have their own driver. Ignore */
968 chip_table = &hpt370;
972 port = &info_hpt370a;
973 chip_table = &hpt370a;
978 chip_table = &hpt372;
981 printk(KERN_ERR "pata_hpt37x: Unknown HPT366 subtype please report (%d).\n", class_rev);
985 switch(dev->device) {
986 case PCI_DEVICE_ID_TTI_HPT372:
987 /* 372N if rev >= 2*/
991 chip_table = &hpt372a;
993 case PCI_DEVICE_ID_TTI_HPT302:
994 /* 302N if rev > 1 */
999 chip_table = &hpt302;
1001 case PCI_DEVICE_ID_TTI_HPT371:
1004 port = &info_hpt372;
1005 chip_table = &hpt371;
1006 /* Single channel device, master is not present
1007 but the BIOS (or us for non x86) must mark it
1009 pci_read_config_byte(dev, 0x50, &mcr1);
1011 pci_write_config_byte(dev, 0x50, mcr1);
1013 case PCI_DEVICE_ID_TTI_HPT374:
1014 chip_table = &hpt374;
1015 port = &info_hpt374;
1018 printk(KERN_ERR "pata_hpt37x: PCI table is bogus please report (%d).\n", dev->device);
1022 /* Ok so this is a chip we support */
1024 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
1025 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
1026 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
1027 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
1029 pci_read_config_byte(dev, 0x5A, &irqmask);
1031 pci_write_config_byte(dev, 0x5a, irqmask);
1034 * default to pci clock. make sure MA15/16 are set to output
1035 * to prevent drives having problems with 40-pin cables. Needed
1036 * for some drives such as IBM-DTLA which will not enter ready
1037 * state on reset when PDIAG is a input.
1040 pci_write_config_byte(dev, 0x5b, 0x23);
1043 * HighPoint does this for HPT372A.
1044 * NOTE: This register is only writeable via I/O space.
1046 if (chip_table == &hpt372a)
1047 outb(0x0e, iobase + 0x9c);
1049 /* Some devices do not let this value be accessed via PCI space
1050 according to the old driver */
1052 freq = inl(iobase + 0x90);
1053 if ((freq >> 12) != 0xABCDE) {
1058 printk(KERN_WARNING "pata_hpt37x: BIOS has not set timing clocks.\n");
1060 /* This is the process the HPT371 BIOS is reported to use */
1061 for(i = 0; i < 128; i++) {
1062 pci_read_config_byte(dev, 0x78, &sr);
1063 total += sr & 0x1FF;
1071 * Turn the frequency check into a band and then find a timing
1072 * table to match it.
1075 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
1076 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
1078 * We need to try PLL mode instead
1080 * For non UDMA133 capable devices we should
1081 * use a 50MHz DPLL by choice
1083 unsigned int f_low, f_high;
1087 dpll = (port->udma_mask & 0xC0) ? 3 : 2;
1089 f_low = (MHz[clock_slot] * 48) / MHz[dpll];
1094 /* Select the DPLL clock. */
1095 pci_write_config_byte(dev, 0x5b, 0x21);
1096 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1098 for(adjust = 0; adjust < 8; adjust++) {
1099 if (hpt37x_calibrate_dpll(dev))
1101 /* See if it'll settle at a fractionally different clock */
1103 f_low -= adjust >> 1;
1105 f_high += adjust >> 1;
1106 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1109 printk(KERN_ERR "pata_hpt37x: DPLL did not stabilize!\n");
1113 private_data = (void *)hpt37x_timings_66;
1115 private_data = (void *)hpt37x_timings_50;
1117 printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using %dMHz DPLL.\n",
1118 MHz[clock_slot], MHz[dpll]);
1120 private_data = (void *)chip_table->clocks[clock_slot];
1122 * Perform a final fixup. Note that we will have used the
1123 * DPLL on the HPT372 which means we don't have to worry
1124 * about lack of UDMA133 support on lower clocks
1127 if (clock_slot < 2 && port == &info_hpt370)
1128 port = &info_hpt370_33;
1129 if (clock_slot < 2 && port == &info_hpt370a)
1130 port = &info_hpt370a_33;
1131 printk(KERN_INFO "pata_hpt37x: %s using %dMHz bus clock.\n",
1132 chip_table->name, MHz[clock_slot]);
1135 /* Now kick off ATA set up */
1137 port_info.private_data = private_data;
1139 return ata_pci_init_one(dev, ppi);
1142 static const struct pci_device_id hpt37x[] = {
1143 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1144 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1145 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1146 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1147 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1152 static struct pci_driver hpt37x_pci_driver = {
1155 .probe = hpt37x_init_one,
1156 .remove = ata_pci_remove_one
1159 static int __init hpt37x_init(void)
1161 return pci_register_driver(&hpt37x_pci_driver);
1164 static void __exit hpt37x_exit(void)
1166 pci_unregister_driver(&hpt37x_pci_driver);
1169 MODULE_AUTHOR("Alan Cox");
1170 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1171 MODULE_LICENSE("GPL");
1172 MODULE_DEVICE_TABLE(pci, hpt37x);
1173 MODULE_VERSION(DRV_VERSION);
1175 module_init(hpt37x_init);
1176 module_exit(hpt37x_exit);