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6ec0a86c64
gcc-5.x warns about a preexisting problem in the hpt36x pata driver: drivers/ata/pata_hpt366.c: In function 'hpt36x_init_one': drivers/ata/pata_hpt366.c:376:9: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers] Other ata drivers have the same problem, as ata_pci_bmdma_init_one takes a non-const pointer, and they solve it by using a cast to turn that pointer into a normal non-const pointer. I also tried to change the ata core code to make host->private_data a const pointer, but that quickly got out of hand, as some other drivers expect it to be writable, so I ended up using the same hack as the others here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Tejun Heo <tj@kernel.org>
427 lines
11 KiB
C
427 lines
11 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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* Look into engine reset on timeout errors. Should not be required.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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/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 "0.6.11"
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struct hpt_clock {
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u8 xfer_mode;
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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 DMA.
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* cycles = value + 1
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* 4:7 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
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* cycles = value + 1
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* 8:11 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
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* register access.
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* 12:15 cmd_low_time. Active time of DIOW_/DIOR_ during task file
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* register access.
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* 16:18 udma_cycle_time. Clock cycles for UDMA xfer?
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* 19:21 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
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* 22:24 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
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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 xfer.
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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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/**
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* hpt36x_find_mode - find the hpt36x timing
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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_mode) {
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if (clocks->xfer_mode == 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 const char * const bad_ata33[] = {
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"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
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"Maxtor 90845U3", "Maxtor 90650U2",
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"Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5",
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"Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
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"Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6",
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"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",
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"Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
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"Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5",
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"Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
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NULL
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};
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static const char * const 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 * const 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,
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const char * const 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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pr_warn("%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 &= ~(0xF8 << ATA_SHIFT_UDMA);
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if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
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mask &= ~(0xF0 << ATA_SHIFT_UDMA);
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} else if (adev->class == ATA_DEV_ATAPI)
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mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
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return mask;
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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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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u8 ata66;
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/*
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* Each channel of pata_hpt366 occupies separate PCI function
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* as the primary channel and bit1 indicates the cable type.
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*/
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pci_read_config_byte(pdev, 0x5A, &ata66);
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if (ata66 & 2)
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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 void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
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u8 mode)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 addr = 0x40 + 4 * adev->devno;
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u32 mask, reg, t;
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/* determine timing mask and find matching clock entry */
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if (mode < XFER_MW_DMA_0)
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mask = 0xc1f8ffff;
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else if (mode < XFER_UDMA_0)
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mask = 0x303800ff;
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else
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mask = 0x30070000;
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t = hpt36x_find_mode(ap, mode);
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/*
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* Combine new mode bits with old config bits and disable
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* on-chip PIO FIFO/buffer (and PIO MST mode as well) to avoid
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* problems handling I/O errors later.
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*/
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pci_read_config_dword(pdev, addr, ®);
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reg = ((reg & ~mask) | (t & mask)) & ~0xc0000000;
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pci_write_config_dword(pdev, addr, reg);
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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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hpt366_set_mode(ap, adev, adev->pio_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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hpt366_set_mode(ap, adev, adev->dma_mode);
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}
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static struct scsi_host_template hpt36x_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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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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.inherits = &ata_bmdma_port_ops,
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.cable_detect = hpt36x_cable_detect,
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.mode_filter = hpt366_filter,
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.set_piomode = hpt366_set_piomode,
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.set_dmamode = hpt366_set_dmamode,
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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 const struct ata_port_info info_hpt366 = {
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA4,
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.port_ops = &hpt366_port_ops
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};
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const struct ata_port_info *ppi[] = { &info_hpt366, NULL };
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const void *hpriv = NULL;
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u32 reg1;
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int rc;
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rc = pcim_enable_device(dev);
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if (rc)
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return rc;
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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 (dev->revision > 2)
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return -ENODEV;
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hpt36x_init_chipset(dev);
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pci_read_config_dword(dev, 0x40, ®1);
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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 9:
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hpriv = &hpt366_40;
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break;
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case 5:
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hpriv = &hpt366_25;
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break;
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default:
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hpriv = &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_bmdma_init_one(dev, ppi, &hpt36x_sht, (void *)hpriv, 0);
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}
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#ifdef CONFIG_PM_SLEEP
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static int hpt36x_reinit_one(struct pci_dev *dev)
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{
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struct ata_host *host = pci_get_drvdata(dev);
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int rc;
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rc = ata_pci_device_do_resume(dev);
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if (rc)
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return rc;
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hpt36x_init_chipset(dev);
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ata_host_resume(host);
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return 0;
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}
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#endif
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static const struct pci_device_id hpt36x[] = {
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{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
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{ },
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};
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static struct pci_driver hpt36x_pci_driver = {
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.name = DRV_NAME,
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.id_table = hpt36x,
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.probe = hpt36x_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM_SLEEP
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.suspend = ata_pci_device_suspend,
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.resume = hpt36x_reinit_one,
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#endif
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};
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module_pci_driver(hpt36x_pci_driver);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, hpt36x);
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MODULE_VERSION(DRV_VERSION);
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