ide: always auto-tune PIO in legacy VLB host drivers

Index: b/drivers/ide/legacy/ali14xx.c
===================================================================
@@ -202,7 +202,7 @@ static const struct ide_port_info ali14x
 	.name			= DRV_NAME,
 	.chipset		= ide_ali14xx,
 	.port_ops		= &ali14xx_port_ops,
-	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 

Index: b/drivers/ide/legacy/dtc2278.c
===================================================================
@@ -101,8 +101,7 @@ static const struct ide_port_info dtc227
 				  IDE_HFLAG_IO_32BIT |
 				  /* disallow ->io_32bit changes */
 				  IDE_HFLAG_NO_IO_32BIT |
-				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE,
+				  IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 

Index: b/drivers/ide/legacy/ht6560b.c
===================================================================
@@ -340,7 +340,6 @@ static const struct ide_port_info ht6560
 	.port_ops		= &ht6560b_port_ops,
 	.host_flags		= IDE_HFLAG_SERIALIZE | /* is this needed? */
 				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE |
 				  IDE_HFLAG_ABUSE_PREFETCH,
 	.pio_mask		= ATA_PIO4,
 };

Index: b/drivers/ide/legacy/qd65xx.c
===================================================================
@@ -12,8 +12,6 @@
  * QDI QD6500/QD6580 EIDE controller fast support
  *
  * To activate controller support, use "ide0=qd65xx"
- * To enable tuning, use "hda=autotune hdb=autotune"
- * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune"
  */
 
 /*

@@ -324,8 +322,7 @@ static const struct ide_port_info qd65xx
 	.name			= DRV_NAME,
 	.chipset		= ide_qd65xx,
 	.host_flags		= IDE_HFLAG_IO_32BIT |
-				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE,
+				  IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 

Index: b/drivers/ide/legacy/umc8672.c
===================================================================
@@ -130,7 +130,7 @@ static const struct ide_port_info umc867
 	.name			= DRV_NAME,
 	.chipset		= ide_umc8672,
 	.port_ops		= &umc8672_port_ops,
-	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 

Index: b/drivers/ide/pci/cmd640.c
===================================================================
@@ -380,6 +380,7 @@ static void cmd640_dump_regs(void)
 }
 #endif
 
+#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
 /*
  * Check whether prefetch is on for a drive,
  * and initialize the unmask flags for safe operation.

@@ -400,9 +401,7 @@ static void __init check_prefetch(ide_dr
 		drive->no_io_32bit = 0;
 	}
 }
-
-#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-
+#else
 /*
  * Sets prefetch mode for a drive.
  */

@@ -459,34 +458,6 @@ static inline u8 pack_nibbles(u8 upper, 
 }
 
 /*
- * This routine retrieves the initial drive timings from the chipset.
- */
-static void __init retrieve_drive_counts(unsigned int index)
-{
-	u8 b;
-
-	/*
-	 * Get the internal setup timing, and convert to clock count
-	 */
-	b = get_cmd640_reg(arttim_regs[index]) & ~0x3f;
-	switch (b) {
-	case 0x00: b = 4; break;
-	case 0x80: b = 3; break;
-	case 0x40: b = 2; break;
-	default:   b = 5; break;
-	}
-	setup_counts[index] = b;
-
-	/*
-	 * Get the active/recovery counts
-	 */
-	b = get_cmd640_reg(drwtim_regs[index]);
-	active_counts[index]   = (b >> 4)   ? (b >> 4)   : 0x10;
-	recovery_counts[index] = (b & 0x0f) ? (b & 0x0f) : 0x10;
-}
-
-
-/*
  * This routine writes the prepared setup/active/recovery counts
  * for a drive into the cmd640 chipset registers to active them.
  */

@@ -681,7 +652,6 @@ static const struct ide_port_info cmd640
 	.chipset		= ide_cmd640,
 	.host_flags		= IDE_HFLAG_SERIALIZE |
 				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE |
 				  IDE_HFLAG_ABUSE_PREFETCH |
 				  IDE_HFLAG_ABUSE_FAST_DEVSEL,
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED

@@ -864,29 +834,16 @@ static int __init cmd640x_init(void)
 		}
 
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-		if (drive->autotune || ((index > 1) && second_port_toggled)) {
-			/*
-			 * Reset timing to the slowest speed and turn off
-			 * prefetch.  This way, the drive identify code has
-			 * a better chance.
-			 */
-			setup_counts    [index] = 4;	/* max possible */
-			active_counts   [index] = 16;	/* max possible */
-			recovery_counts [index] = 16;	/* max possible */
-			program_drive_counts(drive, index);
-			set_prefetch_mode(drive, index, 0);
-			printk("cmd640: drive%d timings/prefetch cleared\n", index);
-		} else {
-			/*
-			 * Record timings/prefetch without changing them.
-			 * This preserves any prior BIOS setup.
-			 */
-			retrieve_drive_counts (index);
-			check_prefetch(drive, index);
-			printk("cmd640: drive%d timings/prefetch(%s) preserved",
-				index, drive->no_io_32bit ? "off" : "on");
-			display_clocks(index);
-		}
+		/*
+		 * Reset timing to the slowest speed and turn off prefetch.
+		 * This way, the drive identify code has a better chance.
+		 */
+		setup_counts    [index] = 4;	/* max possible */
+		active_counts   [index] = 16;	/* max possible */
+		recovery_counts [index] = 16;	/* max possible */
+		program_drive_counts(drive, index);
+		set_prefetch_mode(drive, index, 0);
+		printk("cmd640: drive%d timings/prefetch cleared\n", index);
 #else
 		/*
 		 * Set the drive unmask flags to match the prefetch setting

Index: b/drivers/ide/arm/icside.c
===================================================================
@@ -480,8 +480,7 @@ static const struct ide_port_info icside
 	.init_dma		= icside_dma_off_init,
 	.port_ops		= &icside_v6_no_dma_port_ops,
 	.dma_ops		= &icside_v6_dma_ops,
-	.host_flags		= IDE_HFLAG_SERIALIZE |
-				  IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_SERIALIZE,
 	.mwdma_mask		= ATA_MWDMA2,
 	.swdma_mask		= ATA_SWDMA2,
 };

Index: b/drivers/ide/ide-probe.c
===================================================================
@@ -1324,8 +1324,7 @@ static void ide_port_init_devices(ide_hw
 			drive->unmask = 1;
 		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
 			drive->no_unmask = 1;
-		if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0)
-			drive->autotune = 1;
+		drive->autotune = 1;
 	}
 
 	if (port_ops && port_ops->port_init_devs)

Index: b/drivers/ide/pci/sgiioc4.c
===================================================================
@@ -573,7 +573,6 @@ static const struct ide_port_info sgiioc
 	.init_dma		= ide_dma_sgiioc4,
 	.port_ops		= &sgiioc4_port_ops,
 	.dma_ops		= &sgiioc4_dma_ops,
-	.host_flags		= IDE_HFLAG_NO_AUTOTUNE,
 	.mwdma_mask		= ATA_MWDMA2_ONLY,
 };
 

Index: b/include/linux/ide.h
===================================================================
@@ -1062,8 +1062,6 @@ enum {
 	IDE_HFLAG_NO_DMA		= (1 << 14),
 	/* check if host is PCI IDE device before allowing DMA */
 	IDE_HFLAG_NO_AUTODMA		= (1 << 15),
-	/* don't autotune PIO */
-	IDE_HFLAG_NO_AUTOTUNE		= (1 << 16),
 	/* host is CS5510/CS5520 */
 	IDE_HFLAG_CS5520		= IDE_HFLAG_VDMA,
 	/* no LBA48 */

Index: b/drivers/ide/ide-probe.c
===================================================================
@@ -826,8 +826,7 @@ static void ide_port_tune_devices(ide_hw
 		ide_drive_t *drive = &hwif->drives[unit];
 
 		if (drive->present) {
-			if (drive->autotune)
-				ide_set_max_pio(drive);
+			ide_set_max_pio(drive);
 
 			drive->nice1 = 1;
 

@@ -1324,7 +1323,6 @@ static void ide_port_init_devices(ide_hw
 			drive->unmask = 1;
 		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
 			drive->no_unmask = 1;
-		drive->autotune = 1;
 	}
 
 	if (port_ops && port_ops->port_init_devs)

Index: b/drivers/ide/ide.c
===================================================================
@@ -851,7 +851,7 @@ static int __init ide_setup(char *s)
 	if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 		const char *hd_words[] = {
 			"none", "noprobe", "nowerr", "cdrom", "nodma",
-			"autotune", "-7", "-8", "-9", "-10",
+			"-6", "-7", "-8", "-9", "-10",
 			"noflush", "remap", "remap63", "scsi", NULL };
 		unit = s[2] - 'a';
 		hw   = unit / MAX_DRIVES;

@@ -879,9 +879,6 @@ static int __init ide_setup(char *s)
 			case -5: /* nodma */
 				drive->nodma = 1;
 				goto done;
-			case -6: /* "autotune" */
-				drive->autotune = 1;
-				goto obsolete_option;
 			case -11: /* noflush */
 				drive->noflush = 1;
 				goto done;

Index: b/include/linux/ide.h
===================================================================
@@ -322,7 +322,6 @@ typedef struct ide_drive_s {
 	unsigned atapi_overlap	: 1;	/* ATAPI overlap (not supported) */
 	unsigned doorlocking	: 1;	/* for removable only: door lock/unlock works */
 	unsigned nodma		: 1;	/* disallow DMA */
-	unsigned autotune	: 1;	/* 0=default, 1=autotune */
 	unsigned remap_0_to_1	: 1;	/* 0=noremap, 1=remap 0->1 (for EZDrive) */
 	unsigned blocked        : 1;	/* 1=powermanagment told us not to do anything, so sleep nicely */
 	unsigned vdma		: 1;	/* 1=doing PIO over DMA 0=doing normal DMA */

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Index: b/drivers/ide/ide.c
===================================================================
@@ -157,32 +157,9 @@ static void ide_port_init_devices_data(i
 	}
 }
 
-/*
- * init_ide_data() sets reasonable default values into all fields
- * of all instances of the hwifs and drives, but only on the first call.
- * Subsequent calls have no effect (they don't wipe out anything).
- *
- * This routine is normally called at driver initialization time,
- * but may also be called MUCH earlier during kernel "command-line"
- * parameter processing.  As such, we cannot depend on any other parts
- * of the kernel (such as memory allocation) to be functioning yet.
- *
- * This is too bad, as otherwise we could dynamically allocate the
- * ide_drive_t structs as needed, rather than always consuming memory
- * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
- *
- * FIXME: We should stuff the setup data into __init and copy the
- * relevant hwifs/allocate them properly during boot.
- */
-#define MAGIC_COOKIE 0x12345678
 static void __init init_ide_data (void)
 {
 	unsigned int index;
-	static unsigned long magic_cookie = MAGIC_COOKIE;
-
-	if (magic_cookie != MAGIC_COOKIE)
-		return;		/* already initialized */
-	magic_cookie = 0;
 
 	/* Initialise all interface structures */
 	for (index = 0; index < MAX_HWIFS; ++index) {

@@ -733,7 +710,6 @@ EXPORT_SYMBOL(generic_ide_ioctl);
 static int __init ide_setup(char *s)
 {
 	printk(KERN_INFO "ide_setup: %s", s);
-	init_ide_data ();
 
 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 	if (!strcmp(s, "ide=doubler")) {