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1275 |
phoenix |
#include <linux/config.h>
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#define __NO_VERSION__
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/blkpg.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/bitops.h>
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#include "ide_modes.h"
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/*
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* IDE library routines. These are plug in code that most
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* drivers can use but occasionally may be weird enough
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* to want to do their own thing with
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*
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* Add common non I/O op stuff here. Make sure it has proper
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* kernel-doc function headers or your patch will be rejected
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*/
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/**
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* ide_xfer_verbose - return IDE mode names
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* @xfer_rate: rate to name
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*
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* Returns a constant string giving the name of the mode
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* requested.
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*/
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char *ide_xfer_verbose (u8 xfer_rate)
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{
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switch(xfer_rate) {
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case XFER_UDMA_7: return("UDMA 7");
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case XFER_UDMA_6: return("UDMA 6");
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case XFER_UDMA_5: return("UDMA 5");
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case XFER_UDMA_4: return("UDMA 4");
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case XFER_UDMA_3: return("UDMA 3");
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case XFER_UDMA_2: return("UDMA 2");
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case XFER_UDMA_1: return("UDMA 1");
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case XFER_UDMA_0: return("UDMA 0");
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case XFER_MW_DMA_2: return("MW DMA 2");
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case XFER_MW_DMA_1: return("MW DMA 1");
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case XFER_MW_DMA_0: return("MW DMA 0");
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case XFER_SW_DMA_2: return("SW DMA 2");
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case XFER_SW_DMA_1: return("SW DMA 1");
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case XFER_SW_DMA_0: return("SW DMA 0");
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case XFER_PIO_4: return("PIO 4");
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case XFER_PIO_3: return("PIO 3");
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case XFER_PIO_2: return("PIO 2");
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case XFER_PIO_1: return("PIO 1");
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case XFER_PIO_0: return("PIO 0");
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case XFER_PIO_SLOW: return("PIO SLOW");
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default: return("XFER ERROR");
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}
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}
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EXPORT_SYMBOL(ide_xfer_verbose);
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/**
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* ide_dma_speed - compute DMA speed
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* @drive: drive
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* @mode; intended mode
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*
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* Checks the drive capabilities and returns the speed to use
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* for the transfer. Returns -1 if the requested mode is unknown
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* (eg PIO)
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*/
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u8 ide_dma_speed(ide_drive_t *drive, u8 mode)
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{
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struct hd_driveid *id = drive->id;
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ide_hwif_t *hwif = HWIF(drive);
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u8 speed = 0;
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if (drive->media != ide_disk && hwif->atapi_dma == 0)
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return 0;
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switch(mode) {
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case 0x04:
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if ((id->dma_ultra & 0x0040) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_6; break; }
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case 0x03:
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if ((id->dma_ultra & 0x0020) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_5; break; }
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case 0x02:
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if ((id->dma_ultra & 0x0010) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_4; break; }
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if ((id->dma_ultra & 0x0008) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_3; break; }
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case 0x01:
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if ((id->dma_ultra & 0x0004) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_2; break; }
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if ((id->dma_ultra & 0x0002) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_1; break; }
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if ((id->dma_ultra & 0x0001) &&
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(id->dma_ultra & hwif->ultra_mask))
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{ speed = XFER_UDMA_0; break; }
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case 0x00:
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if ((id->dma_mword & 0x0004) &&
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(id->dma_mword & hwif->mwdma_mask))
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{ speed = XFER_MW_DMA_2; break; }
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if ((id->dma_mword & 0x0002) &&
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(id->dma_mword & hwif->mwdma_mask))
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{ speed = XFER_MW_DMA_1; break; }
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if ((id->dma_mword & 0x0001) &&
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(id->dma_mword & hwif->mwdma_mask))
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{ speed = XFER_MW_DMA_0; break; }
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if ((id->dma_1word & 0x0004) &&
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(id->dma_1word & hwif->swdma_mask))
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{ speed = XFER_SW_DMA_2; break; }
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if ((id->dma_1word & 0x0002) &&
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(id->dma_1word & hwif->swdma_mask))
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{ speed = XFER_SW_DMA_1; break; }
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if ((id->dma_1word & 0x0001) &&
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(id->dma_1word & hwif->swdma_mask))
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{ speed = XFER_SW_DMA_0; break; }
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}
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// printk("%s: %s: mode 0x%02x, speed 0x%02x\n",
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// __FUNCTION__, drive->name, mode, speed);
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return speed;
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}
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EXPORT_SYMBOL(ide_dma_speed);
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/**
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* ide_rate_filter - return best speed for mode
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* @mode: modes available
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* @speed: desired speed
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*
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* Given the available DMA/UDMA mode this function returns
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* the best available speed at or below the speed requested.
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*/
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u8 ide_rate_filter (u8 mode, u8 speed)
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{
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#ifdef CONFIG_BLK_DEV_IDEDMA
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static u8 speed_max[] = {
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XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
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XFER_UDMA_5, XFER_UDMA_6
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};
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// printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
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/* So that we remember to update this if new modes appear */
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if (mode > 4)
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BUG();
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return min(speed, speed_max[mode]);
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#else /* !CONFIG_BLK_DEV_IDEDMA */
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return min(speed, XFER_PIO_4);
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#endif /* CONFIG_BLK_DEV_IDEDMA */
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}
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EXPORT_SYMBOL(ide_rate_filter);
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int ide_dma_enable (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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struct hd_driveid *id = drive->id;
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return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
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((id->dma_mword >> 8) & hwif->mwdma_mask) ||
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((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
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}
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EXPORT_SYMBOL(ide_dma_enable);
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const ide_pio_timings_t ide_pio_timings[6] = {
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{ 70, 165, 600 }, /* PIO Mode 0 */
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{ 50, 125, 383 }, /* PIO Mode 1 */
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{ 30, 100, 240 }, /* PIO Mode 2 */
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{ 30, 80, 180 }, /* PIO Mode 3 with IORDY */
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{ 25, 70, 120 }, /* PIO Mode 4 with IORDY */
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{ 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
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};
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EXPORT_SYMBOL_GPL(ide_pio_timings);
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/*
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* Black list. Some drives incorrectly report their maximal PIO mode,
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* at least in respect to CMD640. Here we keep info on some known drives.
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*/
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static struct ide_pio_info {
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const char *name;
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int pio;
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} ide_pio_blacklist [] = {
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/* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
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{ "Conner Peripherals 540MB - CFS540A", 3 },
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{ "WDC AC2700", 3 },
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{ "WDC AC2540", 3 },
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{ "WDC AC2420", 3 },
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{ "WDC AC2340", 3 },
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{ "WDC AC2250", 0 },
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{ "WDC AC2200", 0 },
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{ "WDC AC21200", 4 },
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{ "WDC AC2120", 0 },
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{ "WDC AC2850", 3 },
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{ "WDC AC1270", 3 },
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{ "WDC AC1170", 1 },
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{ "WDC AC1210", 1 },
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{ "WDC AC280", 0 },
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/* { "WDC AC21000", 4 }, */
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{ "WDC AC31000", 3 },
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{ "WDC AC31200", 3 },
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/* { "WDC AC31600", 4 }, */
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{ "Maxtor 7131 AT", 1 },
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{ "Maxtor 7171 AT", 1 },
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{ "Maxtor 7213 AT", 1 },
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{ "Maxtor 7245 AT", 1 },
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{ "Maxtor 7345 AT", 1 },
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{ "Maxtor 7546 AT", 3 },
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{ "Maxtor 7540 AV", 3 },
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| 240 |
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{ "SAMSUNG SHD-3121A", 1 },
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{ "SAMSUNG SHD-3122A", 1 },
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{ "SAMSUNG SHD-3172A", 1 },
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| 243 |
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| 244 |
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/* { "ST51080A", 4 },
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* { "ST51270A", 4 },
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* { "ST31220A", 4 },
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| 247 |
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* { "ST31640A", 4 },
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| 248 |
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* { "ST32140A", 4 },
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| 249 |
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* { "ST3780A", 4 },
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| 250 |
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*/
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| 251 |
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{ "ST5660A", 3 },
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{ "ST3660A", 3 },
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| 253 |
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{ "ST3630A", 3 },
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| 254 |
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{ "ST3655A", 3 },
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{ "ST3391A", 3 },
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| 256 |
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{ "ST3390A", 1 },
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| 257 |
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{ "ST3600A", 1 },
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| 258 |
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{ "ST3290A", 0 },
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| 259 |
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{ "ST3144A", 0 },
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| 260 |
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{ "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
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| 261 |
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/* drive) according to Seagates FIND-ATA program */
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| 262 |
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| 263 |
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{ "QUANTUM ELS127A", 0 },
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| 264 |
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{ "QUANTUM ELS170A", 0 },
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| 265 |
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{ "QUANTUM LPS240A", 0 },
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| 266 |
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{ "QUANTUM LPS210A", 3 },
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| 267 |
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{ "QUANTUM LPS270A", 3 },
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| 268 |
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{ "QUANTUM LPS365A", 3 },
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| 269 |
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{ "QUANTUM LPS540A", 3 },
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| 270 |
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{ "QUANTUM LIGHTNING 540A", 3 },
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| 271 |
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{ "QUANTUM LIGHTNING 730A", 3 },
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| 272 |
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| 273 |
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{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
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| 274 |
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{ "QUANTUM FIREBALL_640", 3 },
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| 275 |
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{ "QUANTUM FIREBALL_1080", 3 },
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| 276 |
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{ "QUANTUM FIREBALL_1280", 3 },
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| 277 |
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{ NULL, 0 }
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| 278 |
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};
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| 279 |
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| 280 |
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/**
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| 281 |
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* ide_scan_pio_blacklist - check for a blacklisted drive
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| 282 |
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* @model: Drive model string
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| 283 |
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*
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| 284 |
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* This routine searches the ide_pio_blacklist for an entry
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| 285 |
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* matching the start/whole of the supplied model name.
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| 286 |
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*
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| 287 |
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* Returns -1 if no match found.
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| 288 |
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* Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
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| 289 |
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*/
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| 290 |
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| 291 |
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static int ide_scan_pio_blacklist (char *model)
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| 292 |
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{
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| 293 |
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struct ide_pio_info *p;
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| 294 |
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| 295 |
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for (p = ide_pio_blacklist; p->name != NULL; p++) {
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| 296 |
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if (strncmp(p->name, model, strlen(p->name)) == 0)
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| 297 |
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return p->pio;
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| 298 |
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}
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| 299 |
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return -1;
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| 300 |
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}
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| 301 |
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| 302 |
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/**
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| 303 |
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* ide_get_best_pio_mode - get PIO mode from drive
|
| 304 |
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* @driver: drive to consider
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| 305 |
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* @mode_wanted: preferred mode
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| 306 |
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* @max_mode: highest allowed
|
| 307 |
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* @d: pio data
|
| 308 |
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*
|
| 309 |
|
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* This routine returns the recommended PIO settings for a given drive,
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| 310 |
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* based on the drive->id information and the ide_pio_blacklist[].
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| 311 |
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* This is used by most chipset support modules when "auto-tuning".
|
| 312 |
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*
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| 313 |
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* Drive PIO mode auto selection
|
| 314 |
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*/
|
| 315 |
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|
| 316 |
|
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u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
|
| 317 |
|
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{
|
| 318 |
|
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int pio_mode;
|
| 319 |
|
|
int cycle_time = 0;
|
| 320 |
|
|
int use_iordy = 0;
|
| 321 |
|
|
struct hd_driveid* id = drive->id;
|
| 322 |
|
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int overridden = 0;
|
| 323 |
|
|
int blacklisted = 0;
|
| 324 |
|
|
|
| 325 |
|
|
if (mode_wanted != 255) {
|
| 326 |
|
|
pio_mode = mode_wanted;
|
| 327 |
|
|
} else if (!drive->id) {
|
| 328 |
|
|
pio_mode = 0;
|
| 329 |
|
|
} else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
|
| 330 |
|
|
overridden = 1;
|
| 331 |
|
|
blacklisted = 1;
|
| 332 |
|
|
use_iordy = (pio_mode > 2);
|
| 333 |
|
|
} else {
|
| 334 |
|
|
pio_mode = id->tPIO;
|
| 335 |
|
|
if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
|
| 336 |
|
|
pio_mode = 2;
|
| 337 |
|
|
overridden = 1;
|
| 338 |
|
|
}
|
| 339 |
|
|
if (id->field_valid & 2) { /* drive implements ATA2? */
|
| 340 |
|
|
if (id->capability & 8) { /* drive supports use_iordy? */
|
| 341 |
|
|
use_iordy = 1;
|
| 342 |
|
|
cycle_time = id->eide_pio_iordy;
|
| 343 |
|
|
if (id->eide_pio_modes & 7) {
|
| 344 |
|
|
overridden = 0;
|
| 345 |
|
|
if (id->eide_pio_modes & 4)
|
| 346 |
|
|
pio_mode = 5;
|
| 347 |
|
|
else if (id->eide_pio_modes & 2)
|
| 348 |
|
|
pio_mode = 4;
|
| 349 |
|
|
else
|
| 350 |
|
|
pio_mode = 3;
|
| 351 |
|
|
}
|
| 352 |
|
|
} else {
|
| 353 |
|
|
cycle_time = id->eide_pio;
|
| 354 |
|
|
}
|
| 355 |
|
|
}
|
| 356 |
|
|
|
| 357 |
|
|
#if 0
|
| 358 |
|
|
if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
|
| 359 |
|
|
#endif
|
| 360 |
|
|
|
| 361 |
|
|
/*
|
| 362 |
|
|
* Conservative "downgrade" for all pre-ATA2 drives
|
| 363 |
|
|
*/
|
| 364 |
|
|
if (pio_mode && pio_mode < 4) {
|
| 365 |
|
|
pio_mode--;
|
| 366 |
|
|
overridden = 1;
|
| 367 |
|
|
#if 0
|
| 368 |
|
|
use_iordy = (pio_mode > 2);
|
| 369 |
|
|
#endif
|
| 370 |
|
|
if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
|
| 371 |
|
|
cycle_time = 0; /* use standard timing */
|
| 372 |
|
|
}
|
| 373 |
|
|
}
|
| 374 |
|
|
if (pio_mode > max_mode) {
|
| 375 |
|
|
pio_mode = max_mode;
|
| 376 |
|
|
cycle_time = 0;
|
| 377 |
|
|
}
|
| 378 |
|
|
if (d) {
|
| 379 |
|
|
d->pio_mode = pio_mode;
|
| 380 |
|
|
d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
|
| 381 |
|
|
d->use_iordy = use_iordy;
|
| 382 |
|
|
d->overridden = overridden;
|
| 383 |
|
|
d->blacklisted = blacklisted;
|
| 384 |
|
|
}
|
| 385 |
|
|
return pio_mode;
|
| 386 |
|
|
}
|
| 387 |
|
|
|
| 388 |
|
|
EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
|
| 389 |
|
|
|
| 390 |
|
|
/**
|
| 391 |
|
|
* ide_toggle_bounce - handle bounce buffering
|
| 392 |
|
|
* @drive: drive to update
|
| 393 |
|
|
* @on: on/off boolean
|
| 394 |
|
|
*
|
| 395 |
|
|
* Enable or disable bounce buffering for the device. Drives move
|
| 396 |
|
|
* between PIO and DMA and that changes the rules we need.
|
| 397 |
|
|
*/
|
| 398 |
|
|
|
| 399 |
|
|
void ide_toggle_bounce(ide_drive_t *drive, int on)
|
| 400 |
|
|
{
|
| 401 |
|
|
u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
|
| 402 |
|
|
|
| 403 |
|
|
if (on && drive->media == ide_disk) {
|
| 404 |
|
|
if (!PCI_DMA_BUS_IS_PHYS)
|
| 405 |
|
|
addr = BLK_BOUNCE_ANY;
|
| 406 |
|
|
else
|
| 407 |
|
|
addr = HWIF(drive)->pci_dev->dma_mask;
|
| 408 |
|
|
}
|
| 409 |
|
|
|
| 410 |
|
|
blk_queue_bounce_limit(&drive->queue, addr);
|
| 411 |
|
|
}
|
| 412 |
|
|
|
| 413 |
|
|
EXPORT_SYMBOL(ide_toggle_bounce);
|
| 414 |
|
|
|
| 415 |
|
|
|
| 416 |
|
|
/**
|
| 417 |
|
|
* ide_set_xfer_rate - set transfer rate
|
| 418 |
|
|
* @drive: drive to set
|
| 419 |
|
|
* @speed: speed to attempt to set
|
| 420 |
|
|
*
|
| 421 |
|
|
* General helper for setting the speed of an IDE device. This
|
| 422 |
|
|
* function knows about user enforced limits from the configuration
|
| 423 |
|
|
* which speedproc() does not. High level drivers should never
|
| 424 |
|
|
* invoke speedproc() directly.
|
| 425 |
|
|
*/
|
| 426 |
|
|
|
| 427 |
|
|
int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
|
| 428 |
|
|
{
|
| 429 |
|
|
#ifndef CONFIG_BLK_DEV_IDEDMA
|
| 430 |
|
|
rate = min(rate, (u8) XFER_PIO_4);
|
| 431 |
|
|
#endif
|
| 432 |
|
|
if(HWIF(drive)->speedproc)
|
| 433 |
|
|
return HWIF(drive)->speedproc(drive, rate);
|
| 434 |
|
|
else
|
| 435 |
|
|
return -1;
|
| 436 |
|
|
}
|
| 437 |
|
|
|
| 438 |
|
|
EXPORT_SYMBOL_GPL(ide_set_xfer_rate);
|
| 439 |
|
|
|
