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d4b2bab4f2
Add @deadline to prereset and reset methods and make them honor it.
ata_wait_ready() which directly takes @deadline is implemented to be
used as the wait function. This patch is in preparation for EH timing
improvements.
* ata_wait_ready() never does busy sleep. It's only used from EH and
no wait in EH is that urgent. This function also prints 'be
patient' message automatically after 5 secs of waiting if more than
3 secs is remaining till deadline.
* ata_bus_post_reset() now fails with error code if any of its wait
fails. This is important because earlier reset tries will have
shorter timeout than the spec requires. If a device fails to
respond before the short timeout, reset should be retried with
longer timeout rather than silently ignoring the device.
There are three behavior differences.
1. Timeout is applied to both devices at once, not separately. This
is more consistent with what the spec says.
2. When a device passes devchk but fails to become ready before
deadline. Previouly, post_reset would just succeed and let
device classification remove the device. New code fails the
reset thus causing reset retry. After a few times, EH will give
up disabling the port.
3. When slave device passes devchk but fails to become accessible
(TF-wise) after reset. Original code disables dev1 after 30s
timeout and continues as if the device doesn't exist, while the
patched code fails reset. When this happens, new code fails
reset on whole port rather than proceeding with only the primary
device.
If the failing device is suffering transient problems, new code
retries reset which is a better behavior. If the failing device is
actually broken, the net effect is identical to it, but not to the
other device sharing the channel. In the previous code, reset would
have succeeded after 30s thus detecting the working one. In the new
code, reset fails and whole port gets disabled. IMO, it's a
pathological case anyway (broken device sharing bus with working
one) and doesn't really matter.
* ata_bus_softreset() is changed to return error code from
ata_bus_post_reset(). It used to return 0 unconditionally.
* Spin up waiting is to be removed and not converted to honor
deadline.
* To be on the safe side, deadline is set to 40s for the time being.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
507 lines
13 KiB
C
507 lines
13 KiB
C
/*
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* Libata driver for the highpoint 366 and 368 UDMA66 ATA controllers.
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*
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* This driver is heavily based upon:
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*
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* linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
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*
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* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
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* Portions Copyright (C) 2001 Sun Microsystems, Inc.
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* Portions Copyright (C) 2003 Red Hat Inc
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*
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*
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* TODO
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* Maybe PLL mode
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* Look into engine reset on timeout errors. Should not be
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* required.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_hpt366"
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#define DRV_VERSION "0.6.1"
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struct hpt_clock {
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u8 xfer_speed;
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u32 timing;
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};
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/* key for bus clock timings
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* bit
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* 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
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* DMA. cycles = value + 1
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* 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
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* DMA. cycles = value + 1
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* 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
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* register access.
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* 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
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* register access.
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* 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
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* during task file register access.
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* 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
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* xfer.
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* 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
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* register access.
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* 28 UDMA enable
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* 29 DMA enable
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* 30 PIO_MST enable. if set, the chip is in bus master mode during
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* PIO.
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* 31 FIFO enable.
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*/
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static const struct hpt_clock hpt366_40[] = {
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{ XFER_UDMA_4, 0x900fd943 },
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{ XFER_UDMA_3, 0x900ad943 },
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{ XFER_UDMA_2, 0x900bd943 },
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{ XFER_UDMA_1, 0x9008d943 },
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{ XFER_UDMA_0, 0x9008d943 },
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{ XFER_MW_DMA_2, 0xa008d943 },
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{ XFER_MW_DMA_1, 0xa010d955 },
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{ XFER_MW_DMA_0, 0xa010d9fc },
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{ XFER_PIO_4, 0xc008d963 },
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{ XFER_PIO_3, 0xc010d974 },
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{ XFER_PIO_2, 0xc010d997 },
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{ XFER_PIO_1, 0xc010d9c7 },
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{ XFER_PIO_0, 0xc018d9d9 },
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{ 0, 0x0120d9d9 }
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};
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static const struct hpt_clock hpt366_33[] = {
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{ XFER_UDMA_4, 0x90c9a731 },
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{ XFER_UDMA_3, 0x90cfa731 },
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{ XFER_UDMA_2, 0x90caa731 },
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{ XFER_UDMA_1, 0x90cba731 },
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{ XFER_UDMA_0, 0x90c8a731 },
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{ XFER_MW_DMA_2, 0xa0c8a731 },
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{ XFER_MW_DMA_1, 0xa0c8a732 }, /* 0xa0c8a733 */
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{ XFER_MW_DMA_0, 0xa0c8a797 },
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{ XFER_PIO_4, 0xc0c8a731 },
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{ XFER_PIO_3, 0xc0c8a742 },
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{ XFER_PIO_2, 0xc0d0a753 },
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{ XFER_PIO_1, 0xc0d0a7a3 }, /* 0xc0d0a793 */
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{ XFER_PIO_0, 0xc0d0a7aa }, /* 0xc0d0a7a7 */
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{ 0, 0x0120a7a7 }
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};
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static const struct hpt_clock hpt366_25[] = {
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{ XFER_UDMA_4, 0x90c98521 },
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{ XFER_UDMA_3, 0x90cf8521 },
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{ XFER_UDMA_2, 0x90cf8521 },
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{ XFER_UDMA_1, 0x90cb8521 },
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{ XFER_UDMA_0, 0x90cb8521 },
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{ XFER_MW_DMA_2, 0xa0ca8521 },
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{ XFER_MW_DMA_1, 0xa0ca8532 },
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{ XFER_MW_DMA_0, 0xa0ca8575 },
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{ XFER_PIO_4, 0xc0ca8521 },
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{ XFER_PIO_3, 0xc0ca8532 },
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{ XFER_PIO_2, 0xc0ca8542 },
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{ XFER_PIO_1, 0xc0d08572 },
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{ XFER_PIO_0, 0xc0d08585 },
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{ 0, 0x01208585 }
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};
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static const char *bad_ata33[] = {
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"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
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"Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
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"Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
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"Maxtor 90510D4",
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"Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
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"Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
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"Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
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NULL
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};
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static const char *bad_ata66_4[] = {
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"IBM-DTLA-307075",
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"IBM-DTLA-307060",
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"IBM-DTLA-307045",
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"IBM-DTLA-307030",
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"IBM-DTLA-307020",
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"IBM-DTLA-307015",
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"IBM-DTLA-305040",
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"IBM-DTLA-305030",
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"IBM-DTLA-305020",
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"IC35L010AVER07-0",
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"IC35L020AVER07-0",
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"IC35L030AVER07-0",
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"IC35L040AVER07-0",
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"IC35L060AVER07-0",
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"WDC AC310200R",
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NULL
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};
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static const char *bad_ata66_3[] = {
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"WDC AC310200R",
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NULL
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};
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static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
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{
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unsigned char model_num[ATA_ID_PROD_LEN + 1];
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int i = 0;
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ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
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while (list[i] != NULL) {
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if (!strcmp(list[i], model_num)) {
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printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
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modestr, list[i]);
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return 1;
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}
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i++;
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}
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return 0;
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}
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/**
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* hpt366_filter - mode selection filter
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* @adev: ATA device
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*
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* Block UDMA on devices that cause trouble with this controller.
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*/
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static unsigned long hpt366_filter(struct ata_device *adev, unsigned long mask)
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{
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if (adev->class == ATA_DEV_ATA) {
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if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
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mask &= ~ATA_MASK_UDMA;
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if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
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mask &= ~(0x07 << ATA_SHIFT_UDMA);
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if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
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mask &= ~(0x0F << ATA_SHIFT_UDMA);
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}
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return ata_pci_default_filter(adev, mask);
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}
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/**
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* hpt36x_find_mode - reset the hpt36x bus
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* @ap: ATA port
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* @speed: transfer mode
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*
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* Return the 32bit register programming information for this channel
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* that matches the speed provided.
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*/
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static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
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{
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struct hpt_clock *clocks = ap->host->private_data;
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while(clocks->xfer_speed) {
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if (clocks->xfer_speed == speed)
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return clocks->timing;
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clocks++;
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}
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BUG();
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return 0xffffffffU; /* silence compiler warning */
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}
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static int hpt36x_cable_detect(struct ata_port *ap)
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{
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u8 ata66;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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pci_read_config_byte(pdev, 0x5A, &ata66);
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if (ata66 & (1 << ap->port_no))
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return ATA_CBL_PATA40;
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return ATA_CBL_PATA80;
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}
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static int hpt36x_pre_reset(struct ata_port *ap, unsigned long deadline)
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{
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static const struct pci_bits hpt36x_enable_bits[] = {
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{ 0x50, 1, 0x04, 0x04 },
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{ 0x54, 1, 0x04, 0x04 }
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};
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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if (!pci_test_config_bits(pdev, &hpt36x_enable_bits[ap->port_no]))
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return -ENOENT;
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return ata_std_prereset(ap, deadline);
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}
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/**
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* hpt36x_error_handler - reset the hpt36x bus
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* @ap: ATA port to reset
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*
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* Perform the reset handling for the 366/368
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*/
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static void hpt36x_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, hpt36x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* hpt366_set_piomode - PIO setup
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* @ap: ATA interface
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* @adev: device on the interface
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*
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* Perform PIO mode setup.
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*/
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static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 addr1, addr2;
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u32 reg;
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u32 mode;
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u8 fast;
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addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
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addr2 = 0x51 + 4 * ap->port_no;
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/* Fast interrupt prediction disable, hold off interrupt disable */
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pci_read_config_byte(pdev, addr2, &fast);
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if (fast & 0x80) {
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fast &= ~0x80;
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pci_write_config_byte(pdev, addr2, fast);
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}
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pci_read_config_dword(pdev, addr1, ®);
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mode = hpt36x_find_mode(ap, adev->pio_mode);
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mode &= ~0x8000000; /* No FIFO in PIO */
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mode &= ~0x30070000; /* Leave config bits alone */
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reg &= 0x30070000; /* Strip timing bits */
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pci_write_config_dword(pdev, addr1, reg | mode);
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}
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/**
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* hpt366_set_dmamode - DMA timing setup
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* @ap: ATA interface
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* @adev: Device being configured
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*
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* Set up the channel for MWDMA or UDMA modes. Much the same as with
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* PIO, load the mode number and then set MWDMA or UDMA flag.
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*/
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static void hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 addr1, addr2;
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u32 reg;
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u32 mode;
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u8 fast;
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addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
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addr2 = 0x51 + 4 * ap->port_no;
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/* Fast interrupt prediction disable, hold off interrupt disable */
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pci_read_config_byte(pdev, addr2, &fast);
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if (fast & 0x80) {
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fast &= ~0x80;
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pci_write_config_byte(pdev, addr2, fast);
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}
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pci_read_config_dword(pdev, addr1, ®);
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mode = hpt36x_find_mode(ap, adev->dma_mode);
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mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
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mode &= ~0xC0000000; /* Leave config bits alone */
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reg &= 0xC0000000; /* Strip timing bits */
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pci_write_config_dword(pdev, addr1, reg | mode);
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}
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static struct scsi_host_template hpt36x_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
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.sg_tablesize = LIBATA_MAX_PRD,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
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.emulated = ATA_SHT_EMULATED,
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.use_clustering = ATA_SHT_USE_CLUSTERING,
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.proc_name = DRV_NAME,
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.dma_boundary = ATA_DMA_BOUNDARY,
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.slave_configure = ata_scsi_slave_config,
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.slave_destroy = ata_scsi_slave_destroy,
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.bios_param = ata_std_bios_param,
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#ifdef CONFIG_PM
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.resume = ata_scsi_device_resume,
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.suspend = ata_scsi_device_suspend,
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#endif
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};
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/*
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* Configuration for HPT366/68
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*/
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static struct ata_port_operations hpt366_port_ops = {
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.port_disable = ata_port_disable,
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.set_piomode = hpt366_set_piomode,
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.set_dmamode = hpt366_set_dmamode,
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.mode_filter = hpt366_filter,
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.tf_load = ata_tf_load,
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.tf_read = ata_tf_read,
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.check_status = ata_check_status,
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.exec_command = ata_exec_command,
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.dev_select = ata_std_dev_select,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = hpt36x_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = hpt36x_cable_detect,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = ata_bmdma_start,
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.bmdma_stop = ata_bmdma_stop,
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.bmdma_status = ata_bmdma_status,
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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.irq_ack = ata_irq_ack,
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.port_start = ata_port_start,
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};
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/**
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* hpt36x_init_chipset - common chip setup
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* @dev: PCI device
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*
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* Perform the chip setup work that must be done at both init and
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* resume time
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*/
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static void hpt36x_init_chipset(struct pci_dev *dev)
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{
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u8 drive_fast;
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pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
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pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
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pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
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pci_read_config_byte(dev, 0x51, &drive_fast);
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if (drive_fast & 0x80)
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pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
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}
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/**
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* hpt36x_init_one - Initialise an HPT366/368
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* @dev: PCI device
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* @id: Entry in match table
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*
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* Initialise an HPT36x device. There are some interesting complications
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* here. Firstly the chip may report 366 and be one of several variants.
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* Secondly all the timings depend on the clock for the chip which we must
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* detect and look up
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*
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* This is the known chip mappings. It may be missing a couple of later
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* releases.
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*
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* Chip version PCI Rev Notes
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* HPT366 4 (HPT366) 0 UDMA66
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* HPT366 4 (HPT366) 1 UDMA66
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* HPT368 4 (HPT366) 2 UDMA66
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* HPT37x/30x 4 (HPT366) 3+ Other driver
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*
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*/
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static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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static struct ata_port_info info_hpt366 = {
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.sht = &hpt36x_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x1f,
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.port_ops = &hpt366_port_ops
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};
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struct ata_port_info *port_info[2] = {&info_hpt366, &info_hpt366};
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|
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u32 class_rev;
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u32 reg1;
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|
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pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
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class_rev &= 0xFF;
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|
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/* May be a later chip in disguise. Check */
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/* Newer chips are not in the HPT36x driver. Ignore them */
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if (class_rev > 2)
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return -ENODEV;
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|
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hpt36x_init_chipset(dev);
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|
|
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pci_read_config_dword(dev, 0x40, ®1);
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|
|
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/* PCI clocking determines the ATA timing values to use */
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/* info_hpt366 is safe against re-entry so we can scribble on it */
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switch((reg1 & 0x700) >> 8) {
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case 5:
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info_hpt366.private_data = &hpt366_40;
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break;
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case 9:
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info_hpt366.private_data = &hpt366_25;
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break;
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default:
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info_hpt366.private_data = &hpt366_33;
|
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break;
|
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}
|
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/* Now kick off ATA set up */
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return ata_pci_init_one(dev, port_info, 2);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
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static int hpt36x_reinit_one(struct pci_dev *dev)
|
|
{
|
|
hpt36x_init_chipset(dev);
|
|
return ata_pci_device_resume(dev);
|
|
}
|
|
#endif
|
|
|
|
static const struct pci_device_id hpt36x[] = {
|
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{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver hpt36x_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = hpt36x,
|
|
.probe = hpt36x_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = hpt36x_reinit_one,
|
|
#endif
|
|
};
|
|
|
|
static int __init hpt36x_init(void)
|
|
{
|
|
return pci_register_driver(&hpt36x_pci_driver);
|
|
}
|
|
|
|
static void __exit hpt36x_exit(void)
|
|
{
|
|
pci_unregister_driver(&hpt36x_pci_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, hpt36x);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(hpt36x_init);
|
|
module_exit(hpt36x_exit);
|