patch-2.3.28 linux/drivers/block/ide-features.c

• Lines: 276
• Date: Fri Nov 12 10:12:11 1999
• Orig file: v2.3.27/linux/drivers/block/ide-features.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.27/linux/drivers/block/ide-features.c linux/drivers/block/ide-features.c
@@ -0,0 +1,275 @@
+/*
+ * linux/drivers/block/ide-features.c
+ *
+ *  Copyright (C) 1999  Linus Torvalds & authors (see below)
+ *  
+ *  Andre Hedrick <andre@suse.com>
+ *
+ *  Extracts if ide.c to address the evolving transfer rate code for
+ *  the SETFEATURES_XFER callouts.  Below are original authors of some or
+ *  various parts of any given function below.
+ *
+ *  Mark Lord     <mlord@pobox.com>
+ *  Gadi Oxman    <gadio@netvision.net.il>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/malloc.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/bitops.h>
+
+/*
+ *
+ */
+char *ide_xfer_verbose (byte xfer_rate)
+{
+	switch(xfer_rate) {
+		case XFER_UDMA_4:	return("UDMA 4");
+		case XFER_UDMA_3:	return("UDMA 3");
+		case XFER_UDMA_2:	return("UDMA 2");
+		case XFER_UDMA_1:	return("UDMA 1");
+		case XFER_UDMA_0:	return("UDMA 0");
+		case XFER_MW_DMA_2:	return("MW DMA 2");
+		case XFER_MW_DMA_1:	return("MW DMA 1");
+		case XFER_MW_DMA_0:	return("MW DMA 0");
+		case XFER_SW_DMA_2:	return("SW DMA 2");
+		case XFER_SW_DMA_1:	return("SW DMA 1");
+		case XFER_SW_DMA_0:	return("SW DMA 0");
+		case XFER_PIO_4:	return("PIO 4");
+		case XFER_PIO_3:	return("PIO 3");
+		case XFER_PIO_2:	return("PIO 2");
+		case XFER_PIO_1:	return("PIO 1");
+		case XFER_PIO_0:	return("PIO 0");
+		case XFER_PIO_SLOW:	return("PIO SLOW");
+		default:		return("XFER ERROR");
+	}
+}
+
+/*
+ *
+ */
+char *ide_media_verbose (ide_drive_t *drive)
+{
+	switch (drive->media) {
+		case ide_disk:		return("disk  ");
+		case ide_cdrom:		return("cdrom ");
+		case ide_tape:		return("tape  ");
+		case ide_floppy:	return("floppy");
+		default:		return("??????");
+	}
+}
+
+int ide_driveid_update (ide_drive_t *drive)
+{
+	/*
+	 * Re-read drive->id for possible DMA mode
+	 * change (copied from ide-probe.c)
+	 */
+	struct hd_driveid *id;
+	unsigned long timeout, irqs, flags;
+
+	probe_irq_off(probe_irq_on());
+	irqs = probe_irq_on();
+	if (IDE_CONTROL_REG)
+		OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
+	ide_delay_50ms();
+	OUT_BYTE(WIN_IDENTIFY, IDE_COMMAND_REG);
+	timeout = jiffies + WAIT_WORSTCASE;
+	do {
+		if (0 < (signed long)(jiffies - timeout)) {
+			if (irqs)
+				(void) probe_irq_off(irqs);
+			return 0;	/* drive timed-out */
+		}
+		ide_delay_50ms();	/* give drive a breather */
+	} while (IN_BYTE(IDE_ALTSTATUS_REG) & BUSY_STAT);
+	ide_delay_50ms();	/* wait for IRQ and DRQ_STAT */
+	if (!OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT))
+		return 0;
+	__save_flags(flags);	/* local CPU only */
+	__cli();		/* local CPU only; some systems need this */
+	id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
+	ide_input_data(drive, id, SECTOR_WORDS);
+	(void) GET_STAT();	/* clear drive IRQ */
+	ide__sti();		/* local CPU only */
+	__restore_flags(flags);	/* local CPU only */
+	ide_fix_driveid(id);
+	if (id && id->cyls) {
+		drive->id->dma_ultra = id->dma_ultra;
+		drive->id->dma_mword = id->dma_mword;
+		drive->id->dma_1word = id->dma_1word;
+		/* anything more ? */
+#ifdef DEBUG
+		printk("%s: dma_ultra=%04X, dma_mword=%04X, dma_1word=%04X\n",
+			drive->name, id->dma_ultra, id->dma_mword, id->dma_1word);
+#endif
+		kfree(id);
+	}
+	return 1;
+}
+
+/*
+ * Similar to ide_wait_stat(), except it never calls ide_error internally.
+ * This is a kludge to handle the new ide_config_drive_speed() function,
+ * and should not otherwise be used anywhere.  Eventually, the tuneproc's
+ * should be updated to return ide_startstop_t, in which case we can get
+ * rid of this abomination again.  :)   -ml
+ */
+int ide_wait_noerr (ide_drive_t *drive, byte good, byte bad, unsigned long timeout)
+{
+	byte stat;
+	int i;
+	unsigned long flags;
+
+	udelay(1);	/* spec allows drive 400ns to assert "BUSY" */
+	if ((stat = GET_STAT()) & BUSY_STAT) {
+		__save_flags(flags);	/* local CPU only */
+		ide__sti();	/* local CPU only */
+		timeout += jiffies;
+		while ((stat = GET_STAT()) & BUSY_STAT) {
+			if (0 < (signed long)(jiffies - timeout)) {
+				__restore_flags(flags);	/* local CPU only */
+				(void)ide_dump_status(drive, "ide_wait_noerr", stat);
+				return 1;
+			}
+		}
+		__restore_flags(flags); /* local CPU only */
+	}
+	/*
+	 * Allow status to settle, then read it again.
+	 * A few rare drives vastly violate the 400ns spec here,
+	 * so we'll wait up to 10usec for a "good" status
+	 * rather than expensively fail things immediately.
+	 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
+	 */
+	for (i = 0; i < 10; i++) {
+		udelay(1);
+		if (OK_STAT((stat = GET_STAT()), good, bad))
+			return 0;
+	}
+	(void)ide_dump_status(drive, "ide_wait_noerr", stat);
+	return 1;
+}
+
+
+/*
+ * Verify that we are doing an approved SETFEATURES_XFER with respect
+ * to the hardware being able to support request.  Since some hardware
+ * can improperly report capabilties, we check to see if the host adapter
+ * in combination with the device (usually a disk) properly detect
+ * and acknowledge each end of the ribbon.
+ */
+int ide_ata66_check (ide_drive_t *drive, int cmd, int nsect, int feature)
+{
+	if ((cmd == WIN_SETFEATURES) &&
+	    (nsect > XFER_UDMA_2) &&
+	    (feature == SETFEATURES_XFER)) {
+		if (!HWIF(drive)->udma_four) {
+			printk("%s: Speed warnings UDMA 3/4 is not functional.\n", HWIF(drive)->name);
+			return 1;
+		}
+		if ((drive->id->word93 & 0x2000) == 0) {
+			printk("%s: Speed warnings UDMA 3/4 is not functional.\n", drive->name);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER.
+ * 1 : Safe to update drive->id DMA registers.
+ * 0 : OOPs not allowed.
+ */
+int set_transfer (ide_drive_t *drive, int cmd, int nsect, int feature)
+{
+	struct hd_driveid *id = drive->id;
+
+	if ((cmd == WIN_SETFEATURES) &&
+	    (nsect >= XFER_SW_DMA_0) &&
+	    (feature == SETFEATURES_XFER) &&
+	    (id->dma_ultra || id->dma_mword || id->dma_1word))
+		return 1;
+	return 0;
+}
+
+int ide_config_drive_speed (ide_drive_t *drive, byte speed)
+{
+	unsigned long flags;
+	int err;
+	byte stat;
+
+	__save_flags(flags);	/* local CPU only */
+	__cli();		/* local CPU only */
+
+	/*
+	 * Don't use ide_wait_cmd here - it will
+	 * attempt to set_geometry and recalibrate,
+	 * but for some reason these don't work at
+	 * this point (lost interrupt).
+	 */
+	SELECT_DRIVE(HWIF(drive), drive);
+	if (IDE_CONTROL_REG)
+		OUT_BYTE(drive->ctl | 2, IDE_CONTROL_REG);
+	OUT_BYTE(speed, IDE_NSECTOR_REG);
+	OUT_BYTE(SETFEATURES_XFER, IDE_FEATURE_REG);
+	OUT_BYTE(WIN_SETFEATURES, IDE_COMMAND_REG);
+
+	err = ide_wait_noerr(drive, DRIVE_READY, BUSY_STAT|DRQ_STAT|ERR_STAT, WAIT_CMD);
+
+#if 0
+	if (IDE_CONTROL_REG)
+		OUT_BYTE(drive->ctl, IDE_CONTROL_REG);
+#endif
+
+	__restore_flags(flags);	/* local CPU only */
+
+	stat = GET_STAT();
+	if (stat != DRIVE_READY)
+		(void) ide_dump_status(drive, "set_drive_speed_status", stat);
+
+	drive->id->dma_ultra &= ~0xFF00;
+	drive->id->dma_mword &= ~0x0F00;
+	drive->id->dma_1word &= ~0x0F00;
+
+	switch(speed) {
+		case XFER_UDMA_4:   drive->id->dma_ultra |= 0x1010; break;
+		case XFER_UDMA_3:   drive->id->dma_ultra |= 0x0808; break;
+		case XFER_UDMA_2:   drive->id->dma_ultra |= 0x0404; break;
+		case XFER_UDMA_1:   drive->id->dma_ultra |= 0x0202; break;
+		case XFER_UDMA_0:   drive->id->dma_ultra |= 0x0101; break;
+		case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
+		case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
+		case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
+		case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
+		case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
+		case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
+		default: break;
+	}
+	return(err);
+}
+
+EXPORT_SYMBOL(ide_driveid_update);
+EXPORT_SYMBOL(ide_wait_noerr);
+EXPORT_SYMBOL(ide_ata66_check);
+EXPORT_SYMBOL(set_transfer);
+EXPORT_SYMBOL(ide_config_drive_speed);
+