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 * @ap: ATA port 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_port *ap, unsigned long deadline)
316 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
317 static const struct pci_bits hpt37x_enable_bits[] = {
318 { 0x50, 1, 0x04, 0x04 },
319 { 0x54, 1, 0x04, 0x04 }
321 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
324 pci_read_config_byte(pdev, 0x5B, &scr2);
325 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
326 /* Cable register now active */
327 pci_read_config_byte(pdev, 0x5A, &ata66);
329 pci_write_config_byte(pdev, 0x5B, scr2);
331 if (ata66 & (1 << ap->port_no))
332 ap->cbl = ATA_CBL_PATA40;
334 ap->cbl = ATA_CBL_PATA80;
336 /* Reset the state machine */
337 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
340 return ata_std_prereset(ap, deadline);
344 * hpt37x_error_handler - reset the hpt374
345 * @ap: ATA port to reset
347 * Perform probe for HPT37x, except for HPT374 channel 2
350 static void hpt37x_error_handler(struct ata_port *ap)
352 ata_bmdma_drive_eh(ap, hpt37x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
355 static int hpt374_pre_reset(struct ata_port *ap, unsigned long deadline)
357 static const struct pci_bits hpt37x_enable_bits[] = {
358 { 0x50, 1, 0x04, 0x04 },
359 { 0x54, 1, 0x04, 0x04 }
363 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
365 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
368 /* Do the extra channel work */
369 pci_read_config_word(pdev, 0x52, &mcr3);
370 pci_read_config_word(pdev, 0x56, &mcr6);
371 /* Set bit 15 of 0x52 to enable TCBLID as input
372 Set bit 15 of 0x56 to enable FCBLID as input
374 pci_write_config_word(pdev, 0x52, mcr3 | 0x8000);
375 pci_write_config_word(pdev, 0x56, mcr6 | 0x8000);
376 pci_read_config_byte(pdev, 0x5A, &ata66);
377 /* Reset TCBLID/FCBLID to output */
378 pci_write_config_word(pdev, 0x52, mcr3);
379 pci_write_config_word(pdev, 0x56, mcr6);
381 if (ata66 & (1 << ap->port_no))
382 ap->cbl = ATA_CBL_PATA40;
384 ap->cbl = ATA_CBL_PATA80;
386 /* Reset the state machine */
387 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
390 return ata_std_prereset(ap, deadline);
394 * hpt374_error_handler - reset the hpt374
397 * The 374 cable detect is a little different due to the extra
398 * channels. The function 0 channels work like usual but function 1
402 static void hpt374_error_handler(struct ata_port *ap)
404 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
406 if (!(PCI_FUNC(pdev->devfn) & 1))
407 hpt37x_error_handler(ap);
409 ata_bmdma_drive_eh(ap, hpt374_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
413 * hpt370_set_piomode - PIO setup
415 * @adev: device on the interface
417 * Perform PIO mode setup.
420 static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev)
422 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
428 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
429 addr2 = 0x51 + 4 * ap->port_no;
431 /* Fast interrupt prediction disable, hold off interrupt disable */
432 pci_read_config_byte(pdev, addr2, &fast);
435 pci_write_config_byte(pdev, addr2, fast);
437 pci_read_config_dword(pdev, addr1, ®);
438 mode = hpt37x_find_mode(ap, adev->pio_mode);
439 mode &= ~0x8000000; /* No FIFO in PIO */
440 mode &= ~0x30070000; /* Leave config bits alone */
441 reg &= 0x30070000; /* Strip timing bits */
442 pci_write_config_dword(pdev, addr1, reg | mode);
446 * hpt370_set_dmamode - DMA timing setup
448 * @adev: Device being configured
450 * Set up the channel for MWDMA or UDMA modes. Much the same as with
451 * PIO, load the mode number and then set MWDMA or UDMA flag.
454 static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev)
456 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
462 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
463 addr2 = 0x51 + 4 * ap->port_no;
465 /* Fast interrupt prediction disable, hold off interrupt disable */
466 pci_read_config_byte(pdev, addr2, &fast);
469 pci_write_config_byte(pdev, addr2, fast);
471 pci_read_config_dword(pdev, addr1, ®);
472 mode = hpt37x_find_mode(ap, adev->dma_mode);
473 mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
474 mode &= ~0xC0000000; /* Leave config bits alone */
475 reg &= 0xC0000000; /* Strip timing bits */
476 pci_write_config_dword(pdev, addr1, reg | mode);
480 * hpt370_bmdma_start - DMA engine begin
483 * The 370 and 370A want us to reset the DMA engine each time we
484 * use it. The 372 and later are fine.
487 static void hpt370_bmdma_start(struct ata_queued_cmd *qc)
489 struct ata_port *ap = qc->ap;
490 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
491 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
497 * hpt370_bmdma_end - DMA engine stop
500 * Work around the HPT370 DMA engine.
503 static void hpt370_bmdma_stop(struct ata_queued_cmd *qc)
505 struct ata_port *ap = qc->ap;
506 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
507 u8 dma_stat = ioread8(ap->ioaddr.bmdma_addr + 2);
509 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
511 if (dma_stat & 0x01) {
513 dma_stat = ioread8(bmdma + 2);
515 if (dma_stat & 0x01) {
516 /* Clear the engine */
517 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
520 dma_cmd = ioread8(bmdma );
521 iowrite8(dma_cmd & 0xFE, bmdma);
523 dma_stat = ioread8(bmdma + 2);
524 iowrite8(dma_stat | 0x06 , bmdma + 2);
525 /* Clear the engine */
526 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
533 * hpt372_set_piomode - PIO setup
535 * @adev: device on the interface
537 * Perform PIO mode setup.
540 static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev)
542 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
548 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
549 addr2 = 0x51 + 4 * ap->port_no;
551 /* Fast interrupt prediction disable, hold off interrupt disable */
552 pci_read_config_byte(pdev, addr2, &fast);
554 pci_write_config_byte(pdev, addr2, fast);
556 pci_read_config_dword(pdev, addr1, ®);
557 mode = hpt37x_find_mode(ap, adev->pio_mode);
559 printk("Find mode for %d reports %X\n", adev->pio_mode, mode);
560 mode &= ~0x80000000; /* No FIFO in PIO */
561 mode &= ~0x30070000; /* Leave config bits alone */
562 reg &= 0x30070000; /* Strip timing bits */
563 pci_write_config_dword(pdev, addr1, reg | mode);
567 * hpt372_set_dmamode - DMA timing setup
569 * @adev: Device being configured
571 * Set up the channel for MWDMA or UDMA modes. Much the same as with
572 * PIO, load the mode number and then set MWDMA or UDMA flag.
575 static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev)
577 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
583 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
584 addr2 = 0x51 + 4 * ap->port_no;
586 /* Fast interrupt prediction disable, hold off interrupt disable */
587 pci_read_config_byte(pdev, addr2, &fast);
589 pci_write_config_byte(pdev, addr2, fast);
591 pci_read_config_dword(pdev, addr1, ®);
592 mode = hpt37x_find_mode(ap, adev->dma_mode);
593 printk("Find mode for DMA %d reports %X\n", adev->dma_mode, mode);
594 mode &= ~0xC0000000; /* Leave config bits alone */
595 mode |= 0x80000000; /* FIFO in MWDMA or UDMA */
596 reg &= 0xC0000000; /* Strip timing bits */
597 pci_write_config_dword(pdev, addr1, reg | mode);
601 * hpt37x_bmdma_end - DMA engine stop
604 * Clean up after the HPT372 and later DMA engine
607 static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc)
609 struct ata_port *ap = qc->ap;
610 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
611 int mscreg = 0x50 + 4 * ap->port_no;
612 u8 bwsr_stat, msc_stat;
614 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
615 pci_read_config_byte(pdev, mscreg, &msc_stat);
616 if (bwsr_stat & (1 << ap->port_no))
617 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
622 static struct scsi_host_template hpt37x_sht = {
623 .module = THIS_MODULE,
625 .ioctl = ata_scsi_ioctl,
626 .queuecommand = ata_scsi_queuecmd,
627 .can_queue = ATA_DEF_QUEUE,
628 .this_id = ATA_SHT_THIS_ID,
629 .sg_tablesize = LIBATA_MAX_PRD,
630 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
631 .emulated = ATA_SHT_EMULATED,
632 .use_clustering = ATA_SHT_USE_CLUSTERING,
633 .proc_name = DRV_NAME,
634 .dma_boundary = ATA_DMA_BOUNDARY,
635 .slave_configure = ata_scsi_slave_config,
636 .slave_destroy = ata_scsi_slave_destroy,
637 .bios_param = ata_std_bios_param,
641 * Configuration for HPT370
644 static struct ata_port_operations hpt370_port_ops = {
645 .port_disable = ata_port_disable,
646 .set_piomode = hpt370_set_piomode,
647 .set_dmamode = hpt370_set_dmamode,
648 .mode_filter = hpt370_filter,
650 .tf_load = ata_tf_load,
651 .tf_read = ata_tf_read,
652 .check_status = ata_check_status,
653 .exec_command = ata_exec_command,
654 .dev_select = ata_std_dev_select,
656 .freeze = ata_bmdma_freeze,
657 .thaw = ata_bmdma_thaw,
658 .error_handler = hpt37x_error_handler,
659 .post_internal_cmd = ata_bmdma_post_internal_cmd,
661 .bmdma_setup = ata_bmdma_setup,
662 .bmdma_start = hpt370_bmdma_start,
663 .bmdma_stop = hpt370_bmdma_stop,
664 .bmdma_status = ata_bmdma_status,
666 .qc_prep = ata_qc_prep,
667 .qc_issue = ata_qc_issue_prot,
669 .data_xfer = ata_data_xfer,
671 .irq_handler = ata_interrupt,
672 .irq_clear = ata_bmdma_irq_clear,
673 .irq_on = ata_irq_on,
674 .irq_ack = ata_irq_ack,
676 .port_start = ata_port_start,
680 * Configuration for HPT370A. Close to 370 but less filters
683 static struct ata_port_operations hpt370a_port_ops = {
684 .port_disable = ata_port_disable,
685 .set_piomode = hpt370_set_piomode,
686 .set_dmamode = hpt370_set_dmamode,
687 .mode_filter = hpt370a_filter,
689 .tf_load = ata_tf_load,
690 .tf_read = ata_tf_read,
691 .check_status = ata_check_status,
692 .exec_command = ata_exec_command,
693 .dev_select = ata_std_dev_select,
695 .freeze = ata_bmdma_freeze,
696 .thaw = ata_bmdma_thaw,
697 .error_handler = hpt37x_error_handler,
698 .post_internal_cmd = ata_bmdma_post_internal_cmd,
700 .bmdma_setup = ata_bmdma_setup,
701 .bmdma_start = hpt370_bmdma_start,
702 .bmdma_stop = hpt370_bmdma_stop,
703 .bmdma_status = ata_bmdma_status,
705 .qc_prep = ata_qc_prep,
706 .qc_issue = ata_qc_issue_prot,
708 .data_xfer = ata_data_xfer,
710 .irq_handler = ata_interrupt,
711 .irq_clear = ata_bmdma_irq_clear,
712 .irq_on = ata_irq_on,
713 .irq_ack = ata_irq_ack,
715 .port_start = ata_port_start,
719 * Configuration for HPT372, HPT371, HPT302. Slightly different PIO
720 * and DMA mode setting functionality.
723 static struct ata_port_operations hpt372_port_ops = {
724 .port_disable = ata_port_disable,
725 .set_piomode = hpt372_set_piomode,
726 .set_dmamode = hpt372_set_dmamode,
727 .mode_filter = ata_pci_default_filter,
729 .tf_load = ata_tf_load,
730 .tf_read = ata_tf_read,
731 .check_status = ata_check_status,
732 .exec_command = ata_exec_command,
733 .dev_select = ata_std_dev_select,
735 .freeze = ata_bmdma_freeze,
736 .thaw = ata_bmdma_thaw,
737 .error_handler = hpt37x_error_handler,
738 .post_internal_cmd = ata_bmdma_post_internal_cmd,
740 .bmdma_setup = ata_bmdma_setup,
741 .bmdma_start = ata_bmdma_start,
742 .bmdma_stop = hpt37x_bmdma_stop,
743 .bmdma_status = ata_bmdma_status,
745 .qc_prep = ata_qc_prep,
746 .qc_issue = ata_qc_issue_prot,
748 .data_xfer = ata_data_xfer,
750 .irq_handler = ata_interrupt,
751 .irq_clear = ata_bmdma_irq_clear,
752 .irq_on = ata_irq_on,
753 .irq_ack = ata_irq_ack,
755 .port_start = ata_port_start,
759 * Configuration for HPT374. Mode setting works like 372 and friends
760 * but we have a different cable detection procedure.
763 static struct ata_port_operations hpt374_port_ops = {
764 .port_disable = ata_port_disable,
765 .set_piomode = hpt372_set_piomode,
766 .set_dmamode = hpt372_set_dmamode,
767 .mode_filter = ata_pci_default_filter,
769 .tf_load = ata_tf_load,
770 .tf_read = ata_tf_read,
771 .check_status = ata_check_status,
772 .exec_command = ata_exec_command,
773 .dev_select = ata_std_dev_select,
775 .freeze = ata_bmdma_freeze,
776 .thaw = ata_bmdma_thaw,
777 .error_handler = hpt374_error_handler,
778 .post_internal_cmd = ata_bmdma_post_internal_cmd,
780 .bmdma_setup = ata_bmdma_setup,
781 .bmdma_start = ata_bmdma_start,
782 .bmdma_stop = hpt37x_bmdma_stop,
783 .bmdma_status = ata_bmdma_status,
785 .qc_prep = ata_qc_prep,
786 .qc_issue = ata_qc_issue_prot,
788 .data_xfer = ata_data_xfer,
790 .irq_handler = ata_interrupt,
791 .irq_clear = ata_bmdma_irq_clear,
792 .irq_on = ata_irq_on,
793 .irq_ack = ata_irq_ack,
795 .port_start = ata_port_start,
799 * htp37x_clock_slot - Turn timing to PC clock entry
800 * @freq: Reported frequency timing
803 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
807 static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
809 unsigned int f = (base * freq) / 192; /* Mhz */
811 return 0; /* 33Mhz slot */
813 return 1; /* 40Mhz slot */
815 return 2; /* 50Mhz slot */
816 return 3; /* 60Mhz slot */
820 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
823 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
827 static int hpt37x_calibrate_dpll(struct pci_dev *dev)
833 for(tries = 0; tries < 0x5000; tries++) {
835 pci_read_config_byte(dev, 0x5b, ®5b);
837 /* See if it stays set */
838 for(tries = 0; tries < 0x1000; tries ++) {
839 pci_read_config_byte(dev, 0x5b, ®5b);
841 if ((reg5b & 0x80) == 0)
844 /* Turn off tuning, we have the DPLL set */
845 pci_read_config_dword(dev, 0x5c, ®5c);
846 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
850 /* Never went stable */
854 * hpt37x_init_one - Initialise an HPT37X/302
856 * @id: Entry in match table
858 * Initialise an HPT37x device. There are some interesting complications
859 * here. Firstly the chip may report 366 and be one of several variants.
860 * Secondly all the timings depend on the clock for the chip which we must
863 * This is the known chip mappings. It may be missing a couple of later
866 * Chip version PCI Rev Notes
867 * HPT366 4 (HPT366) 0 Other driver
868 * HPT366 4 (HPT366) 1 Other driver
869 * HPT368 4 (HPT366) 2 Other driver
870 * HPT370 4 (HPT366) 3 UDMA100
871 * HPT370A 4 (HPT366) 4 UDMA100
872 * HPT372 4 (HPT366) 5 UDMA133 (1)
873 * HPT372N 4 (HPT366) 6 Other driver
874 * HPT372A 5 (HPT372) 1 UDMA133 (1)
875 * HPT372N 5 (HPT372) 2 Other driver
876 * HPT302 6 (HPT302) 1 UDMA133
877 * HPT302N 6 (HPT302) 2 Other driver
878 * HPT371 7 (HPT371) * UDMA133
879 * HPT374 8 (HPT374) * UDMA133 4 channel
880 * HPT372N 9 (HPT372N) * Other driver
882 * (1) UDMA133 support depends on the bus clock
885 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
887 /* HPT370 - UDMA100 */
888 static const struct ata_port_info info_hpt370 = {
890 .flags = ATA_FLAG_SLAVE_POSS,
893 .udma_mask = ATA_UDMA5,
894 .port_ops = &hpt370_port_ops
896 /* HPT370A - UDMA100 */
897 static const struct ata_port_info info_hpt370a = {
899 .flags = ATA_FLAG_SLAVE_POSS,
902 .udma_mask = ATA_UDMA5,
903 .port_ops = &hpt370a_port_ops
905 /* HPT370 - UDMA100 */
906 static const struct ata_port_info info_hpt370_33 = {
908 .flags = ATA_FLAG_SLAVE_POSS,
912 .port_ops = &hpt370_port_ops
914 /* HPT370A - UDMA100 */
915 static const struct ata_port_info info_hpt370a_33 = {
917 .flags = ATA_FLAG_SLAVE_POSS,
921 .port_ops = &hpt370a_port_ops
923 /* HPT371, 372 and friends - UDMA133 */
924 static const struct ata_port_info info_hpt372 = {
926 .flags = ATA_FLAG_SLAVE_POSS,
929 .udma_mask = ATA_UDMA6,
930 .port_ops = &hpt372_port_ops
932 /* HPT374 - UDMA100 */
933 static const struct ata_port_info info_hpt374 = {
935 .flags = ATA_FLAG_SLAVE_POSS,
938 .udma_mask = ATA_UDMA5,
939 .port_ops = &hpt374_port_ops
942 static const int MHz[4] = { 33, 40, 50, 66 };
943 const struct ata_port_info *port;
944 void *private_data = NULL;
945 struct ata_port_info port_info;
946 const struct ata_port_info *ppi[] = { &port_info, NULL };
954 unsigned long iobase = pci_resource_start(dev, 4);
956 const struct hpt_chip *chip_table;
959 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
962 if (dev->device == PCI_DEVICE_ID_TTI_HPT366) {
963 /* May be a later chip in disguise. Check */
964 /* Older chips are in the HPT366 driver. Ignore them */
967 /* N series chips have their own driver. Ignore */
974 chip_table = &hpt370;
978 port = &info_hpt370a;
979 chip_table = &hpt370a;
984 chip_table = &hpt372;
987 printk(KERN_ERR "pata_hpt37x: Unknown HPT366 subtype please report (%d).\n", class_rev);
991 switch(dev->device) {
992 case PCI_DEVICE_ID_TTI_HPT372:
993 /* 372N if rev >= 2*/
997 chip_table = &hpt372a;
999 case PCI_DEVICE_ID_TTI_HPT302:
1000 /* 302N if rev > 1 */
1003 port = &info_hpt372;
1005 chip_table = &hpt302;
1007 case PCI_DEVICE_ID_TTI_HPT371:
1010 port = &info_hpt372;
1011 chip_table = &hpt371;
1012 /* Single channel device, master is not present
1013 but the BIOS (or us for non x86) must mark it
1015 pci_read_config_byte(dev, 0x50, &mcr1);
1017 pci_write_config_byte(dev, 0x50, mcr1);
1019 case PCI_DEVICE_ID_TTI_HPT374:
1020 chip_table = &hpt374;
1021 port = &info_hpt374;
1024 printk(KERN_ERR "pata_hpt37x: PCI table is bogus please report (%d).\n", dev->device);
1028 /* Ok so this is a chip we support */
1030 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
1031 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
1032 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
1033 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
1035 pci_read_config_byte(dev, 0x5A, &irqmask);
1037 pci_write_config_byte(dev, 0x5a, irqmask);
1040 * default to pci clock. make sure MA15/16 are set to output
1041 * to prevent drives having problems with 40-pin cables. Needed
1042 * for some drives such as IBM-DTLA which will not enter ready
1043 * state on reset when PDIAG is a input.
1046 pci_write_config_byte(dev, 0x5b, 0x23);
1049 * HighPoint does this for HPT372A.
1050 * NOTE: This register is only writeable via I/O space.
1052 if (chip_table == &hpt372a)
1053 outb(0x0e, iobase + 0x9c);
1055 /* Some devices do not let this value be accessed via PCI space
1056 according to the old driver */
1058 freq = inl(iobase + 0x90);
1059 if ((freq >> 12) != 0xABCDE) {
1064 printk(KERN_WARNING "pata_hpt37x: BIOS has not set timing clocks.\n");
1066 /* This is the process the HPT371 BIOS is reported to use */
1067 for(i = 0; i < 128; i++) {
1068 pci_read_config_byte(dev, 0x78, &sr);
1069 total += sr & 0x1FF;
1077 * Turn the frequency check into a band and then find a timing
1078 * table to match it.
1081 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
1082 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
1084 * We need to try PLL mode instead
1086 * For non UDMA133 capable devices we should
1087 * use a 50MHz DPLL by choice
1089 unsigned int f_low, f_high;
1093 dpll = (port->udma_mask & 0xC0) ? 3 : 2;
1095 f_low = (MHz[clock_slot] * 48) / MHz[dpll];
1100 /* Select the DPLL clock. */
1101 pci_write_config_byte(dev, 0x5b, 0x21);
1102 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1104 for(adjust = 0; adjust < 8; adjust++) {
1105 if (hpt37x_calibrate_dpll(dev))
1107 /* See if it'll settle at a fractionally different clock */
1109 f_low -= adjust >> 1;
1111 f_high += adjust >> 1;
1112 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
1115 printk(KERN_ERR "pata_hpt37x: DPLL did not stabilize!\n");
1119 private_data = (void *)hpt37x_timings_66;
1121 private_data = (void *)hpt37x_timings_50;
1123 printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using %dMHz DPLL.\n",
1124 MHz[clock_slot], MHz[dpll]);
1126 private_data = (void *)chip_table->clocks[clock_slot];
1128 * Perform a final fixup. Note that we will have used the
1129 * DPLL on the HPT372 which means we don't have to worry
1130 * about lack of UDMA133 support on lower clocks
1133 if (clock_slot < 2 && port == &info_hpt370)
1134 port = &info_hpt370_33;
1135 if (clock_slot < 2 && port == &info_hpt370a)
1136 port = &info_hpt370a_33;
1137 printk(KERN_INFO "pata_hpt37x: %s using %dMHz bus clock.\n",
1138 chip_table->name, MHz[clock_slot]);
1141 /* Now kick off ATA set up */
1143 port_info.private_data = private_data;
1145 return ata_pci_init_one(dev, ppi);
1148 static const struct pci_device_id hpt37x[] = {
1149 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1150 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1151 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1152 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1153 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1158 static struct pci_driver hpt37x_pci_driver = {
1161 .probe = hpt37x_init_one,
1162 .remove = ata_pci_remove_one
1165 static int __init hpt37x_init(void)
1167 return pci_register_driver(&hpt37x_pci_driver);
1170 static void __exit hpt37x_exit(void)
1172 pci_unregister_driver(&hpt37x_pci_driver);
1175 MODULE_AUTHOR("Alan Cox");
1176 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1177 MODULE_LICENSE("GPL");
1178 MODULE_DEVICE_TABLE(pci, hpt37x);
1179 MODULE_VERSION(DRV_VERSION);
1181 module_init(hpt37x_init);
1182 module_exit(hpt37x_exit);