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) 2005-2006 MontaVista Software, Inc.
15 * Look into engine reset on timeout errors. Should not be
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/pci.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <scsi/scsi_host.h>
26 #include <linux/libata.h>
28 #define DRV_NAME "pata_hpt37x"
29 #define DRV_VERSION "0.6.5"
39 struct hpt_clock const *clocks[4];
42 /* key for bus clock timings
44 * 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
45 * DMA. cycles = value + 1
46 * 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
47 * DMA. cycles = value + 1
48 * 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
50 * 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
52 * 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
53 * during task file register access.
54 * 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
56 * 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
60 * 30 PIO_MST enable. if set, the chip is in bus master mode during
65 static struct hpt_clock hpt37x_timings_33[] = {
66 { XFER_UDMA_6, 0x12446231 }, /* 0x12646231 ?? */
67 { XFER_UDMA_5, 0x12446231 },
68 { XFER_UDMA_4, 0x12446231 },
69 { XFER_UDMA_3, 0x126c6231 },
70 { XFER_UDMA_2, 0x12486231 },
71 { XFER_UDMA_1, 0x124c6233 },
72 { XFER_UDMA_0, 0x12506297 },
74 { XFER_MW_DMA_2, 0x22406c31 },
75 { XFER_MW_DMA_1, 0x22406c33 },
76 { XFER_MW_DMA_0, 0x22406c97 },
78 { XFER_PIO_4, 0x06414e31 },
79 { XFER_PIO_3, 0x06414e42 },
80 { XFER_PIO_2, 0x06414e53 },
81 { XFER_PIO_1, 0x06814e93 },
82 { XFER_PIO_0, 0x06814ea7 }
85 static struct hpt_clock hpt37x_timings_50[] = {
86 { XFER_UDMA_6, 0x12848242 },
87 { XFER_UDMA_5, 0x12848242 },
88 { XFER_UDMA_4, 0x12ac8242 },
89 { XFER_UDMA_3, 0x128c8242 },
90 { XFER_UDMA_2, 0x120c8242 },
91 { XFER_UDMA_1, 0x12148254 },
92 { XFER_UDMA_0, 0x121882ea },
94 { XFER_MW_DMA_2, 0x22808242 },
95 { XFER_MW_DMA_1, 0x22808254 },
96 { XFER_MW_DMA_0, 0x228082ea },
98 { XFER_PIO_4, 0x0a81f442 },
99 { XFER_PIO_3, 0x0a81f443 },
100 { XFER_PIO_2, 0x0a81f454 },
101 { XFER_PIO_1, 0x0ac1f465 },
102 { XFER_PIO_0, 0x0ac1f48a }
105 static struct hpt_clock hpt37x_timings_66[] = {
106 { XFER_UDMA_6, 0x1c869c62 },
107 { XFER_UDMA_5, 0x1cae9c62 }, /* 0x1c8a9c62 */
108 { XFER_UDMA_4, 0x1c8a9c62 },
109 { XFER_UDMA_3, 0x1c8e9c62 },
110 { XFER_UDMA_2, 0x1c929c62 },
111 { XFER_UDMA_1, 0x1c9a9c62 },
112 { XFER_UDMA_0, 0x1c829c62 },
114 { XFER_MW_DMA_2, 0x2c829c62 },
115 { XFER_MW_DMA_1, 0x2c829c66 },
116 { XFER_MW_DMA_0, 0x2c829d2e },
118 { XFER_PIO_4, 0x0c829c62 },
119 { XFER_PIO_3, 0x0c829c84 },
120 { XFER_PIO_2, 0x0c829ca6 },
121 { XFER_PIO_1, 0x0d029d26 },
122 { XFER_PIO_0, 0x0d029d5e }
126 static const struct hpt_chip hpt370 = {
137 static const struct hpt_chip hpt370a = {
148 static const struct hpt_chip hpt372 = {
159 static const struct hpt_chip hpt302 = {
170 static const struct hpt_chip hpt371 = {
181 static const struct hpt_chip hpt372a = {
192 static const struct hpt_chip hpt374 = {
204 * hpt37x_find_mode - reset the hpt37x bus
206 * @speed: transfer mode
208 * Return the 32bit register programming information for this channel
209 * that matches the speed provided.
212 static u32 hpt37x_find_mode(struct ata_port *ap, int speed)
214 struct hpt_clock *clocks = ap->host->private_data;
216 while(clocks->xfer_speed) {
217 if (clocks->xfer_speed == speed)
218 return clocks->timing;
222 return 0xffffffffU; /* silence compiler warning */
225 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
227 unsigned char model_num[ATA_ID_PROD_LEN + 1];
230 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
232 while (list[i] != NULL) {
233 if (!strcmp(list[i], model_num)) {
234 printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
243 static const char *bad_ata33[] = {
244 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
245 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
246 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
248 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
249 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
250 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
254 static const char *bad_ata100_5[] = {
274 * hpt370_filter - mode selection filter
277 * Block UDMA on devices that cause trouble with this controller.
280 static unsigned long hpt370_filter(struct ata_device *adev, unsigned long mask)
282 if (adev->class == ATA_DEV_ATA) {
283 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
284 mask &= ~ATA_MASK_UDMA;
285 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
286 mask &= ~(0x1F << ATA_SHIFT_UDMA);
288 return ata_pci_default_filter(adev, mask);
292 * hpt370a_filter - mode selection filter
295 * Block UDMA on devices that cause trouble with this controller.
298 static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
300 if (adev->class != ATA_DEV_ATA) {
301 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
302 mask &= ~ (0x1F << ATA_SHIFT_UDMA);
304 return ata_pci_default_filter(adev, mask);
308 * hpt37x_pre_reset - reset the hpt37x bus
309 * @ap: ATA port to reset
311 * Perform the initial reset handling for the 370/372 and 374 func 0
314 static int hpt37x_pre_reset(struct ata_port *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(ap);
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_port *ap)
358 static const struct pci_bits hpt37x_enable_bits[] = {
359 { 0x50, 1, 0x04, 0x04 },
360 { 0x54, 1, 0x04, 0x04 }
364 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
366 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
369 /* Do the extra channel work */
370 pci_read_config_word(pdev, 0x52, &mcr3);
371 pci_read_config_word(pdev, 0x56, &mcr6);
372 /* Set bit 15 of 0x52 to enable TCBLID as input
373 Set bit 15 of 0x56 to enable FCBLID as input
375 pci_write_config_word(pdev, 0x52, mcr3 | 0x8000);
376 pci_write_config_word(pdev, 0x56, mcr6 | 0x8000);
377 pci_read_config_byte(pdev, 0x5A, &ata66);
378 /* Reset TCBLID/FCBLID to output */
379 pci_write_config_word(pdev, 0x52, mcr3);
380 pci_write_config_word(pdev, 0x56, mcr6);
382 if (ata66 & (1 << ap->port_no))
383 ap->cbl = ATA_CBL_PATA40;
385 ap->cbl = ATA_CBL_PATA80;
387 /* Reset the state machine */
388 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
391 return ata_std_prereset(ap);
395 * hpt374_error_handler - reset the hpt374
398 * The 374 cable detect is a little different due to the extra
399 * channels. The function 0 channels work like usual but function 1
403 static void hpt374_error_handler(struct ata_port *ap)
405 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
407 if (!(PCI_FUNC(pdev->devfn) & 1))
408 hpt37x_error_handler(ap);
410 ata_bmdma_drive_eh(ap, hpt374_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
414 * hpt370_set_piomode - PIO setup
416 * @adev: device on the interface
418 * Perform PIO mode setup.
421 static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev)
423 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
429 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
430 addr2 = 0x51 + 4 * ap->port_no;
432 /* Fast interrupt prediction disable, hold off interrupt disable */
433 pci_read_config_byte(pdev, addr2, &fast);
436 pci_write_config_byte(pdev, addr2, fast);
438 pci_read_config_dword(pdev, addr1, ®);
439 mode = hpt37x_find_mode(ap, adev->pio_mode);
440 mode &= ~0x8000000; /* No FIFO in PIO */
441 mode &= ~0x30070000; /* Leave config bits alone */
442 reg &= 0x30070000; /* Strip timing bits */
443 pci_write_config_dword(pdev, addr1, reg | mode);
447 * hpt370_set_dmamode - DMA timing setup
449 * @adev: Device being configured
451 * Set up the channel for MWDMA or UDMA modes. Much the same as with
452 * PIO, load the mode number and then set MWDMA or UDMA flag.
455 static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev)
457 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
463 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
464 addr2 = 0x51 + 4 * ap->port_no;
466 /* Fast interrupt prediction disable, hold off interrupt disable */
467 pci_read_config_byte(pdev, addr2, &fast);
470 pci_write_config_byte(pdev, addr2, fast);
472 pci_read_config_dword(pdev, addr1, ®);
473 mode = hpt37x_find_mode(ap, adev->dma_mode);
474 mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
475 mode &= ~0xC0000000; /* Leave config bits alone */
476 reg &= 0xC0000000; /* Strip timing bits */
477 pci_write_config_dword(pdev, addr1, reg | mode);
481 * hpt370_bmdma_start - DMA engine begin
484 * The 370 and 370A want us to reset the DMA engine each time we
485 * use it. The 372 and later are fine.
488 static void hpt370_bmdma_start(struct ata_queued_cmd *qc)
490 struct ata_port *ap = qc->ap;
491 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
492 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
498 * hpt370_bmdma_end - DMA engine stop
501 * Work around the HPT370 DMA engine.
504 static void hpt370_bmdma_stop(struct ata_queued_cmd *qc)
506 struct ata_port *ap = qc->ap;
507 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
508 u8 dma_stat = ioread8(ap->ioaddr.bmdma_addr + 2);
510 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
512 if (dma_stat & 0x01) {
514 dma_stat = ioread8(bmdma + 2);
516 if (dma_stat & 0x01) {
517 /* Clear the engine */
518 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
521 dma_cmd = ioread8(bmdma );
522 iowrite8(dma_cmd & 0xFE, bmdma);
524 dma_stat = ioread8(bmdma + 2);
525 iowrite8(dma_stat | 0x06 , bmdma + 2);
526 /* Clear the engine */
527 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
534 * hpt372_set_piomode - PIO setup
536 * @adev: device on the interface
538 * Perform PIO mode setup.
541 static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev)
543 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
549 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
550 addr2 = 0x51 + 4 * ap->port_no;
552 /* Fast interrupt prediction disable, hold off interrupt disable */
553 pci_read_config_byte(pdev, addr2, &fast);
555 pci_write_config_byte(pdev, addr2, fast);
557 pci_read_config_dword(pdev, addr1, ®);
558 mode = hpt37x_find_mode(ap, adev->pio_mode);
560 printk("Find mode for %d reports %X\n", adev->pio_mode, mode);
561 mode &= ~0x80000000; /* No FIFO in PIO */
562 mode &= ~0x30070000; /* Leave config bits alone */
563 reg &= 0x30070000; /* Strip timing bits */
564 pci_write_config_dword(pdev, addr1, reg | mode);
568 * hpt372_set_dmamode - DMA timing setup
570 * @adev: Device being configured
572 * Set up the channel for MWDMA or UDMA modes. Much the same as with
573 * PIO, load the mode number and then set MWDMA or UDMA flag.
576 static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev)
578 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
584 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
585 addr2 = 0x51 + 4 * ap->port_no;
587 /* Fast interrupt prediction disable, hold off interrupt disable */
588 pci_read_config_byte(pdev, addr2, &fast);
590 pci_write_config_byte(pdev, addr2, fast);
592 pci_read_config_dword(pdev, addr1, ®);
593 mode = hpt37x_find_mode(ap, adev->dma_mode);
594 printk("Find mode for DMA %d reports %X\n", adev->dma_mode, mode);
595 mode &= ~0xC0000000; /* Leave config bits alone */
596 mode |= 0x80000000; /* FIFO in MWDMA or UDMA */
597 reg &= 0xC0000000; /* Strip timing bits */
598 pci_write_config_dword(pdev, addr1, reg | mode);
602 * hpt37x_bmdma_end - DMA engine stop
605 * Clean up after the HPT372 and later DMA engine
608 static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc)
610 struct ata_port *ap = qc->ap;
611 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
612 int mscreg = 0x50 + 4 * ap->port_no;
613 u8 bwsr_stat, msc_stat;
615 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
616 pci_read_config_byte(pdev, mscreg, &msc_stat);
617 if (bwsr_stat & (1 << ap->port_no))
618 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
623 static struct scsi_host_template hpt37x_sht = {
624 .module = THIS_MODULE,
626 .ioctl = ata_scsi_ioctl,
627 .queuecommand = ata_scsi_queuecmd,
628 .can_queue = ATA_DEF_QUEUE,
629 .this_id = ATA_SHT_THIS_ID,
630 .sg_tablesize = LIBATA_MAX_PRD,
631 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
632 .emulated = ATA_SHT_EMULATED,
633 .use_clustering = ATA_SHT_USE_CLUSTERING,
634 .proc_name = DRV_NAME,
635 .dma_boundary = ATA_DMA_BOUNDARY,
636 .slave_configure = ata_scsi_slave_config,
637 .slave_destroy = ata_scsi_slave_destroy,
638 .bios_param = ata_std_bios_param,
642 * Configuration for HPT370
645 static struct ata_port_operations hpt370_port_ops = {
646 .port_disable = ata_port_disable,
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,
675 .irq_ack = ata_irq_ack,
677 .port_start = ata_port_start,
681 * Configuration for HPT370A. Close to 370 but less filters
684 static struct ata_port_operations hpt370a_port_ops = {
685 .port_disable = ata_port_disable,
686 .set_piomode = hpt370_set_piomode,
687 .set_dmamode = hpt370_set_dmamode,
688 .mode_filter = hpt370a_filter,
690 .tf_load = ata_tf_load,
691 .tf_read = ata_tf_read,
692 .check_status = ata_check_status,
693 .exec_command = ata_exec_command,
694 .dev_select = ata_std_dev_select,
696 .freeze = ata_bmdma_freeze,
697 .thaw = ata_bmdma_thaw,
698 .error_handler = hpt37x_error_handler,
699 .post_internal_cmd = ata_bmdma_post_internal_cmd,
701 .bmdma_setup = ata_bmdma_setup,
702 .bmdma_start = hpt370_bmdma_start,
703 .bmdma_stop = hpt370_bmdma_stop,
704 .bmdma_status = ata_bmdma_status,
706 .qc_prep = ata_qc_prep,
707 .qc_issue = ata_qc_issue_prot,
709 .data_xfer = ata_data_xfer,
711 .irq_handler = ata_interrupt,
712 .irq_clear = ata_bmdma_irq_clear,
713 .irq_on = ata_irq_on,
714 .irq_ack = ata_irq_ack,
716 .port_start = ata_port_start,
720 * Configuration for HPT372, HPT371, HPT302. Slightly different PIO
721 * and DMA mode setting functionality.
724 static struct ata_port_operations hpt372_port_ops = {
725 .port_disable = ata_port_disable,
726 .set_piomode = hpt372_set_piomode,
727 .set_dmamode = hpt372_set_dmamode,
728 .mode_filter = ata_pci_default_filter,
730 .tf_load = ata_tf_load,
731 .tf_read = ata_tf_read,
732 .check_status = ata_check_status,
733 .exec_command = ata_exec_command,
734 .dev_select = ata_std_dev_select,
736 .freeze = ata_bmdma_freeze,
737 .thaw = ata_bmdma_thaw,
738 .error_handler = hpt37x_error_handler,
739 .post_internal_cmd = ata_bmdma_post_internal_cmd,
741 .bmdma_setup = ata_bmdma_setup,
742 .bmdma_start = ata_bmdma_start,
743 .bmdma_stop = hpt37x_bmdma_stop,
744 .bmdma_status = ata_bmdma_status,
746 .qc_prep = ata_qc_prep,
747 .qc_issue = ata_qc_issue_prot,
749 .data_xfer = ata_data_xfer,
751 .irq_handler = ata_interrupt,
752 .irq_clear = ata_bmdma_irq_clear,
753 .irq_on = ata_irq_on,
754 .irq_ack = ata_irq_ack,
756 .port_start = ata_port_start,
760 * Configuration for HPT374. Mode setting works like 372 and friends
761 * but we have a different cable detection procedure.
764 static struct ata_port_operations hpt374_port_ops = {
765 .port_disable = ata_port_disable,
766 .set_piomode = hpt372_set_piomode,
767 .set_dmamode = hpt372_set_dmamode,
768 .mode_filter = ata_pci_default_filter,
770 .tf_load = ata_tf_load,
771 .tf_read = ata_tf_read,
772 .check_status = ata_check_status,
773 .exec_command = ata_exec_command,
774 .dev_select = ata_std_dev_select,
776 .freeze = ata_bmdma_freeze,
777 .thaw = ata_bmdma_thaw,
778 .error_handler = hpt374_error_handler,
779 .post_internal_cmd = ata_bmdma_post_internal_cmd,
781 .bmdma_setup = ata_bmdma_setup,
782 .bmdma_start = ata_bmdma_start,
783 .bmdma_stop = hpt37x_bmdma_stop,
784 .bmdma_status = ata_bmdma_status,
786 .qc_prep = ata_qc_prep,
787 .qc_issue = ata_qc_issue_prot,
789 .data_xfer = ata_data_xfer,
791 .irq_handler = ata_interrupt,
792 .irq_clear = ata_bmdma_irq_clear,
793 .irq_on = ata_irq_on,
794 .irq_ack = ata_irq_ack,
796 .port_start = ata_port_start,
800 * htp37x_clock_slot - Turn timing to PC clock entry
801 * @freq: Reported frequency timing
804 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
808 static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
810 unsigned int f = (base * freq) / 192; /* Mhz */
812 return 0; /* 33Mhz slot */
814 return 1; /* 40Mhz slot */
816 return 2; /* 50Mhz slot */
817 return 3; /* 60Mhz slot */
821 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
824 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
828 static int hpt37x_calibrate_dpll(struct pci_dev *dev)
834 for(tries = 0; tries < 0x5000; tries++) {
836 pci_read_config_byte(dev, 0x5b, ®5b);
838 /* See if it stays set */
839 for(tries = 0; tries < 0x1000; tries ++) {
840 pci_read_config_byte(dev, 0x5b, ®5b);
842 if ((reg5b & 0x80) == 0)
845 /* Turn off tuning, we have the DPLL set */
846 pci_read_config_dword(dev, 0x5c, ®5c);
847 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
851 /* Never went stable */
855 * hpt37x_init_one - Initialise an HPT37X/302
857 * @id: Entry in match table
859 * Initialise an HPT37x device. There are some interesting complications
860 * here. Firstly the chip may report 366 and be one of several variants.
861 * Secondly all the timings depend on the clock for the chip which we must
864 * This is the known chip mappings. It may be missing a couple of later
867 * Chip version PCI Rev Notes
868 * HPT366 4 (HPT366) 0 Other driver
869 * HPT366 4 (HPT366) 1 Other driver
870 * HPT368 4 (HPT366) 2 Other driver
871 * HPT370 4 (HPT366) 3 UDMA100
872 * HPT370A 4 (HPT366) 4 UDMA100
873 * HPT372 4 (HPT366) 5 UDMA133 (1)
874 * HPT372N 4 (HPT366) 6 Other driver
875 * HPT372A 5 (HPT372) 1 UDMA133 (1)
876 * HPT372N 5 (HPT372) 2 Other driver
877 * HPT302 6 (HPT302) 1 UDMA133
878 * HPT302N 6 (HPT302) 2 Other driver
879 * HPT371 7 (HPT371) * UDMA133
880 * HPT374 8 (HPT374) * UDMA133 4 channel
881 * HPT372N 9 (HPT372N) * Other driver
883 * (1) UDMA133 support depends on the bus clock
886 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
888 /* HPT370 - UDMA100 */
889 static struct ata_port_info info_hpt370 = {
891 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
895 .port_ops = &hpt370_port_ops
897 /* HPT370A - UDMA100 */
898 static struct ata_port_info info_hpt370a = {
900 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
904 .port_ops = &hpt370a_port_ops
906 /* HPT370 - UDMA100 */
907 static struct ata_port_info info_hpt370_33 = {
909 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
913 .port_ops = &hpt370_port_ops
915 /* HPT370A - UDMA100 */
916 static struct ata_port_info info_hpt370a_33 = {
918 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
922 .port_ops = &hpt370a_port_ops
924 /* HPT371, 372 and friends - UDMA133 */
925 static struct ata_port_info info_hpt372 = {
927 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
931 .port_ops = &hpt372_port_ops
933 /* HPT371, 372 and friends - UDMA100 at 50MHz clock */
934 static struct ata_port_info info_hpt372_50 = {
936 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
940 .port_ops = &hpt372_port_ops
942 /* HPT374 - UDMA133 */
943 static struct ata_port_info info_hpt374 = {
945 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
949 .port_ops = &hpt374_port_ops
952 static const int MHz[4] = { 33, 40, 50, 66 };
954 struct ata_port_info *port_info[2];
955 struct ata_port_info *port;
963 unsigned long iobase = pci_resource_start(dev, 4);
965 const struct hpt_chip *chip_table;
968 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
971 if (dev->device == PCI_DEVICE_ID_TTI_HPT366) {
972 /* May be a later chip in disguise. Check */
973 /* Older chips are in the HPT366 driver. Ignore them */
976 /* N series chips have their own driver. Ignore */
983 chip_table = &hpt370;
987 port = &info_hpt370a;
988 chip_table = &hpt370a;
993 chip_table = &hpt372;
996 printk(KERN_ERR "pata_hpt37x: Unknown HPT366 subtype please report (%d).\n", class_rev);
1000 switch(dev->device) {
1001 case PCI_DEVICE_ID_TTI_HPT372:
1002 /* 372N if rev >= 2*/
1005 port = &info_hpt372;
1006 chip_table = &hpt372a;
1008 case PCI_DEVICE_ID_TTI_HPT302:
1009 /* 302N if rev > 1 */
1012 port = &info_hpt372;
1014 chip_table = &hpt302;
1016 case PCI_DEVICE_ID_TTI_HPT371:
1019 port = &info_hpt372;
1020 chip_table = &hpt371;
1021 /* Single channel device, master is not present
1022 but the BIOS (or us for non x86) must mark it
1024 pci_read_config_byte(dev, 0x50, &mcr1);
1026 pci_write_config_byte(dev, 0x50, mcr1);
1028 case PCI_DEVICE_ID_TTI_HPT374:
1029 chip_table = &hpt374;
1030 port = &info_hpt374;
1033 printk(KERN_ERR "pata_hpt37x: PCI table is bogus please report (%d).\n", dev->device);
1037 /* Ok so this is a chip we support */
1039 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
1040 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
1041 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
1042 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
1044 pci_read_config_byte(dev, 0x5A, &irqmask);
1046 pci_write_config_byte(dev, 0x5a, irqmask);
1049 * default to pci clock. make sure MA15/16 are set to output
1050 * to prevent drives having problems with 40-pin cables. Needed
1051 * for some drives such as IBM-DTLA which will not enter ready
1052 * state on reset when PDIAG is a input.
1055 pci_write_config_byte(dev, 0x5b, 0x23);
1058 * HighPoint does this for HPT372A.
1059 * NOTE: This register is only writeable via I/O space.
1061 if (chip_table == &hpt372a)
1062 outb(0x0e, iobase + 0x9c);
1064 /* Some devices do not let this value be accessed via PCI space
1065 according to the old driver */
1067 freq = inl(iobase + 0x90);
1068 if ((freq >> 12) != 0xABCDE) {
1073 printk(KERN_WARNING "pata_hpt37x: BIOS has not set timing clocks.\n");
1075 /* This is the process the HPT371 BIOS is reported to use */
1076 for(i = 0; i < 128; i++) {
1077 pci_read_config_byte(dev, 0x78, &sr);
1078 total += sr & 0x1FF;
1086 * Turn the frequency check into a band and then find a timing
1087 * table to match it.
1090 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
1091 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
1093 * We need to try PLL mode instead
1095 * For non UDMA133 capable devices we should
1096 * use a 50MHz DPLL by choice
1098 unsigned int f_low, f_high;
1102 if (port->udma_mask & 0xE0)
1105 f_low = (MHz[clock_slot] * chip_table->base) / 192;
1108 /* Select the DPLL clock. */
1109 pci_write_config_byte(dev, 0x5b, 0x21);
1111 for(adjust = 0; adjust < 8; adjust++) {
1112 if (hpt37x_calibrate_dpll(dev))
1114 /* See if it'll settle at a fractionally different clock */
1115 if ((adjust & 3) == 3) {
1119 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
1122 printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");
1125 if (clock_slot == 3)
1126 port->private_data = (void *)hpt37x_timings_66;
1128 port->private_data = (void *)hpt37x_timings_50;
1130 printk(KERN_INFO "hpt37x: Bus clock %dMHz, using DPLL.\n", MHz[clock_slot]);
1132 port->private_data = (void *)chip_table->clocks[clock_slot];
1134 * Perform a final fixup. Note that we will have used the
1135 * DPLL on the HPT372 which means we don't have to worry
1136 * about lack of UDMA133 support on lower clocks
1139 if (clock_slot < 2 && port == &info_hpt370)
1140 port = &info_hpt370_33;
1141 if (clock_slot < 2 && port == &info_hpt370a)
1142 port = &info_hpt370a_33;
1143 printk(KERN_INFO "hpt37x: %s: Bus clock %dMHz.\n", chip_table->name, MHz[clock_slot]);
1146 port_info[0] = port_info[1] = port;
1147 /* Now kick off ATA set up */
1148 return ata_pci_init_one(dev, port_info, 2);
1151 static const struct pci_device_id hpt37x[] = {
1152 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1153 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1154 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1155 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1156 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1161 static struct pci_driver hpt37x_pci_driver = {
1164 .probe = hpt37x_init_one,
1165 .remove = ata_pci_remove_one
1168 static int __init hpt37x_init(void)
1170 return pci_register_driver(&hpt37x_pci_driver);
1173 static void __exit hpt37x_exit(void)
1175 pci_unregister_driver(&hpt37x_pci_driver);
1178 MODULE_AUTHOR("Alan Cox");
1179 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1180 MODULE_LICENSE("GPL");
1181 MODULE_DEVICE_TABLE(pci, hpt37x);
1182 MODULE_VERSION(DRV_VERSION);
1184 module_init(hpt37x_init);
1185 module_exit(hpt37x_exit);