From 62128b2ca812c1266f4ff7bac068bf0b626c6179 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:21 +0200
Subject: [PATCH 01/12] opti621: disable read prefetch

This fixes 2.6.25 regression (kernel.org bugzilla bug #10723) caused by:

commit 912fb29a36a7269ac1c4a4df45bc0ac1d2637972
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date:   Fri Oct 19 00:30:11 2007 +0200

    opti621: always tune PIO
...

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Bisected-by: Juergen Kosel <juergen.kosel@gmx.de>
Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 6e99080497bf..e31e0f970a2c 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -102,18 +102,6 @@
  *  address: 50 ns, data: 50 ns, recovery: 100 ns.
  */
 
-/* #define READ_PREFETCH 0 */
-/* Uncomment for disable read prefetch.
- * There is some readprefetch capatibility in hdparm,
- * but when I type hdparm -P 1 /dev/hda, I got errors
- * and till reset drive is inaccessible.
- * This (hw) read prefetch is safe on my drive.
- */
-
-#ifndef READ_PREFETCH
-#define READ_PREFETCH 0x40 /* read prefetch is enabled */
-#endif /* else read prefetch is disabled */
-
 #define READ_REG 0	/* index of Read cycle timing register */
 #define WRITE_REG 1	/* index of Write cycle timing register */
 #define CNTRL_REG 3	/* index of Control register */
@@ -264,7 +252,8 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 	cycle1 = ((first.data_time-1)<<4)  | (first.recovery_time-2);
 	cycle2 = ((second.data_time-1)<<4) | (second.recovery_time-2);
-	misc = READ_PREFETCH | ((ax-1)<<4) | ((drdy-2)<<1);
+
+	misc = ((ax - 1) << 4) | ((drdy - 2) << 1);
 
 #ifdef OPTI621_DEBUG
 	printk("%s: master: address: %d, data: %d, "

From f361037631ba547ea88adf8d2359d810c1b2605a Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:21 +0200
Subject: [PATCH 02/12] opti621: remove DMA support

These controllers don't support DMA.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index e31e0f970a2c..65f180738947 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -324,18 +324,14 @@ static const struct ide_port_info opti621_chipsets[] __devinitdata = {
 		.name		= "OPTI621",
 		.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
 		.port_ops	= &opti621_port_ops,
-		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA,
+		.host_flags	= IDE_HFLAG_NO_DMA,
 		.pio_mask	= ATA_PIO3,
-		.swdma_mask	= ATA_SWDMA2,
-		.mwdma_mask	= ATA_MWDMA2,
 	}, {	/* 1 */
 		.name		= "OPTI621X",
 		.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
 		.port_ops	= &opti621_port_ops,
-		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA,
+		.host_flags	= IDE_HFLAG_NO_DMA,
 		.pio_mask	= ATA_PIO3,
-		.swdma_mask	= ATA_SWDMA2,
-		.mwdma_mask	= ATA_MWDMA2,
 	}
 };
 

From 21bd33a656a60daadc475ce330272f4410ae27b7 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:22 +0200
Subject: [PATCH 03/12] opti621: use PCI clock value provided by controller

Use PCI clock value provided by controller instead of depending on
a default (or user supplied) value.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 42 ++++++++++++++++++++-------------------
 1 file changed, 22 insertions(+), 20 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 65f180738947..7547fa2d83ac 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -193,11 +193,10 @@ typedef struct pio_clocks_s {
 	int	recovery_time;	/* Recovery time (clocks) */
 } pio_clocks_t;
 
-static void compute_clocks(int pio, pio_clocks_t *clks)
+static void compute_clocks(int pio, pio_clocks_t *clks, int bus_speed)
 {
 	if (pio != PIO_NOT_EXIST) {
 		int adr_setup, data_pls;
-		int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
 
 		adr_setup = ide_pio_timings[pio].setup_time;
 		data_pls = ide_pio_timings[pio].active_time;
@@ -234,7 +233,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	u8 pio1 = 0, pio2 = 0;
 	pio_clocks_t first, second;
 	int ax, drdy;
-	u8 cycle1, cycle2, misc;
+	u8 cycle1, cycle2, misc, clk;
 	ide_hwif_t *hwif = HWIF(drive);
 
 	/* sets drive->drive_data for both drives */
@@ -242,8 +241,26 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	pio1 = hwif->drives[0].drive_data;
 	pio2 = hwif->drives[1].drive_data;
 
-	compute_clocks(pio1, &first);
-	compute_clocks(pio2, &second);
+	spin_lock_irqsave(&opti621_lock, flags);
+
+	reg_base = hwif->io_ports.data_addr;
+
+	/* allow Register-B */
+	outb(0xc0, reg_base + CNTRL_REG);
+	/* hmm, setupvic.exe does this ;-) */
+	outb(0xff, reg_base + 5);
+	/* if reads 0xff, adapter not exist? */
+	(void)inb(reg_base + CNTRL_REG);
+	/* if reads 0xc0, no interface exist? */
+	read_reg(CNTRL_REG);
+
+	/* check CLK speed */
+	clk = read_reg(STRAP_REG) & 1;
+
+	printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
+
+	compute_clocks(pio1, &first,  clk ? 25 : 33);
+	compute_clocks(pio2, &second, clk ? 25 : 33);
 
 	/* ax = max(a1,a2) */
 	ax = (first.address_time < second.address_time) ? second.address_time : first.address_time;
@@ -266,21 +283,6 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		second.recovery_time, drdy);
 #endif
 
-	spin_lock_irqsave(&opti621_lock, flags);
-
-	reg_base = hwif->io_ports.data_addr;
-
-	/* allow Register-B */
-	outb(0xc0, reg_base + CNTRL_REG);
-	/* hmm, setupvic.exe does this ;-) */
-	outb(0xff, reg_base + 5);
-	/* if reads 0xff, adapter not exist? */
-	(void)inb(reg_base + CNTRL_REG);
-	/* if reads 0xc0, no interface exist? */
-	read_reg(CNTRL_REG);
-	/* read version, probably 0 */
-	read_reg(STRAP_REG);
-
 	/* program primary drive */
 	/* select Index-0 for Register-A */
 	write_reg(0, MISC_REG);

From 6c987183fcc3c6cb9eb77fd0b3e8ca1ac98a4813 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:22 +0200
Subject: [PATCH 04/12] opti621: program devices timings separately in
 ->set_pio_mode

* Set drive->drive_data to 'pio + XFER_PIO_0' instead of 'pio',
  then simplify selecting maximum adress setup timing.

* Remove no longer needed compute_pios() and opti621_port_init_devs().

* Program devices timings separately in ->set_pio_mode.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 80 ++++++++-------------------------------
 1 file changed, 15 insertions(+), 65 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 7547fa2d83ac..c746e6f06077 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -115,34 +115,6 @@ static int reg_base;
 
 static DEFINE_SPINLOCK(opti621_lock);
 
-/* there are stored pio numbers from other calls of opti621_set_pio_mode */
-static void compute_pios(ide_drive_t *drive, const u8 pio)
-/* Store values into drive->drive_data
- *	second_contr - 0 for primary controller, 1 for secondary
- *	slave_drive - 0 -> pio is for master, 1 -> pio is for slave
- *	pio - PIO mode for selected drive (for other we don't know)
- */
-{
-	int d;
-	ide_hwif_t *hwif = HWIF(drive);
-
-	drive->drive_data = pio;
-
-	for (d = 0; d < 2; ++d) {
-		drive = &hwif->drives[d];
-		if (drive->present) {
-			if (drive->drive_data == PIO_DONT_KNOW)
-				drive->drive_data = ide_get_best_pio_mode(drive, 255, 3);
-#ifdef OPTI621_DEBUG
-			printk("%s: Selected PIO mode %d\n",
-				drive->name, drive->drive_data);
-#endif
-		} else {
-			drive->drive_data = PIO_NOT_EXIST;
-		}
-	}
-}
-
 static int cmpt_clk(int time, int bus_speed)
 /* Returns (rounded up) time in clocks for time in ns,
  * with bus_speed in MHz.
@@ -226,20 +198,19 @@ static void compute_clocks(int pio, pio_clocks_t *clks, int bus_speed)
 
 static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
-	/* primary and secondary drives share some registers,
-	 * so we have to program both drives
-	 */
+	ide_hwif_t *hwif = drive->hwif;
+	ide_drive_t *pair = ide_get_paired_drive(drive);
 	unsigned long flags;
-	u8 pio1 = 0, pio2 = 0;
 	pio_clocks_t first, second;
 	int ax, drdy;
-	u8 cycle1, cycle2, misc, clk;
-	ide_hwif_t *hwif = HWIF(drive);
+	u8 cycle1, misc, clk, addr_pio = pio;
 
-	/* sets drive->drive_data for both drives */
-	compute_pios(drive, pio);
-	pio1 = hwif->drives[0].drive_data;
-	pio2 = hwif->drives[1].drive_data;
+	drive->drive_data = XFER_PIO_0 + pio;
+
+	if (pair->present) {
+		if (pair->drive_data && pair->drive_data < drive->drive_data)
+			addr_pio = pair->drive_data - XFER_PIO_0;
+	}
 
 	spin_lock_irqsave(&opti621_lock, flags);
 
@@ -259,8 +230,8 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 	printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
 
-	compute_clocks(pio1, &first,  clk ? 25 : 33);
-	compute_clocks(pio2, &second, clk ? 25 : 33);
+	compute_clocks(pio, &first, clk ? 25 : 33);
+	compute_clocks(addr_pio, &second, clk ? 25 : 33);
 
 	/* ax = max(a1,a2) */
 	ax = (first.address_time < second.address_time) ? second.address_time : first.address_time;
@@ -268,37 +239,23 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	drdy = 2; /* DRDY is default 2 (by OPTi Databook) */
 
 	cycle1 = ((first.data_time-1)<<4)  | (first.recovery_time-2);
-	cycle2 = ((second.data_time-1)<<4) | (second.recovery_time-2);
 
 	misc = ((ax - 1) << 4) | ((drdy - 2) << 1);
 
 #ifdef OPTI621_DEBUG
-	printk("%s: master: address: %d, data: %d, "
+	printk("%s: address: %d, data: %d, "
 		"recovery: %d, drdy: %d [clk]\n",
-		hwif->name, ax, first.data_time,
+		drive->name, ax, first.data_time,
 		first.recovery_time, drdy);
-	printk("%s: slave:  address: %d, data: %d, "
-		"recovery: %d, drdy: %d [clk]\n",
-		hwif->name, ax, second.data_time,
-		second.recovery_time, drdy);
 #endif
 
-	/* program primary drive */
-	/* select Index-0 for Register-A */
-	write_reg(0, MISC_REG);
+	/* select Index-0/1 for Register-A/B */
+	write_reg(drive->select.b.unit, MISC_REG);
 	/* set read cycle timings */
 	write_reg(cycle1, READ_REG);
 	/* set write cycle timings */
 	write_reg(cycle1, WRITE_REG);
 
-	/* program secondary drive */
-	/* select Index-1 for Register-B */
-	write_reg(1, MISC_REG);
-	/* set read cycle timings */
-	write_reg(cycle2, READ_REG);
-	/* set write cycle timings */
-	write_reg(cycle2, WRITE_REG);
-
 	/* use Register-A for drive 0 */
 	/* use Register-B for drive 1 */
 	write_reg(0x85, CNTRL_REG);
@@ -310,14 +267,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	spin_unlock_irqrestore(&opti621_lock, flags);
 }
 
-static void __devinit opti621_port_init_devs(ide_hwif_t *hwif)
-{
-	hwif->drives[0].drive_data = PIO_DONT_KNOW;
-	hwif->drives[1].drive_data = PIO_DONT_KNOW;
-}
-
 static const struct ide_port_ops opti621_port_ops = {
-	.port_init_devs		= opti621_port_init_devs,
 	.set_pio_mode		= opti621_set_pio_mode,
 };
 

From 810253d44bc92b44b66cd9944b579de54c0cd3ff Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:22 +0200
Subject: [PATCH 05/12] opti621: use pre-calculated PIO timings

* Use pre-calculated PIO timings in ->set_pio_mode.

* Remove no longer needed compute_clocks(), cmpt_clk(), struct pio_clocks_s,
  PIO_* defines and OPTI621_DEBUG define.

There should be no functional changes caused by this patch.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 92 +++++++--------------------------------
 1 file changed, 15 insertions(+), 77 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index c746e6f06077..8c715b7a85db 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -81,8 +81,6 @@
  * 0.5 doesn't work.
  */
 
-#define OPTI621_DEBUG		/* define for debug messages */
-
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -110,23 +108,8 @@
 
 static int reg_base;
 
-#define PIO_NOT_EXIST 254
-#define PIO_DONT_KNOW 255
-
 static DEFINE_SPINLOCK(opti621_lock);
 
-static int cmpt_clk(int time, int bus_speed)
-/* Returns (rounded up) time in clocks for time in ns,
- * with bus_speed in MHz.
- * Example: bus_speed = 40 MHz, time = 80 ns
- * 1000/40 = 25 ns (clk value),
- * 80/25 = 3.2, rounded up to 4 (I hope ;-)).
- * Use idebus=xx to select right frequency.
- */
-{
-	return ((time*bus_speed+999)/1000);
-}
-
 /* Write value to register reg, base of register
  * is at reg_base (0x1f0 primary, 0x170 secondary,
  * if not changed by PCI configuration).
@@ -159,51 +142,22 @@ static u8 read_reg(int reg)
 	return ret;
 }
 
-typedef struct pio_clocks_s {
-	int	address_time;	/* Address setup (clocks) */
-	int	data_time;	/* Active/data pulse (clocks) */
-	int	recovery_time;	/* Recovery time (clocks) */
-} pio_clocks_t;
-
-static void compute_clocks(int pio, pio_clocks_t *clks, int bus_speed)
-{
-	if (pio != PIO_NOT_EXIST) {
-		int adr_setup, data_pls;
-
-		adr_setup = ide_pio_timings[pio].setup_time;
-		data_pls = ide_pio_timings[pio].active_time;
-		clks->address_time = cmpt_clk(adr_setup, bus_speed);
-		clks->data_time = cmpt_clk(data_pls, bus_speed);
-		clks->recovery_time = cmpt_clk(ide_pio_timings[pio].cycle_time
-			- adr_setup-data_pls, bus_speed);
-		if (clks->address_time < 1)
-			clks->address_time = 1;
-		if (clks->address_time > 4)
-			clks->address_time = 4;
-		if (clks->data_time < 1)
-			clks->data_time = 1;
-		if (clks->data_time > 16)
-			clks->data_time = 16;
-		if (clks->recovery_time < 2)
-			clks->recovery_time = 2;
-		if (clks->recovery_time > 17)
-			clks->recovery_time = 17;
-	} else {
-		clks->address_time = 1;
-		clks->data_time = 1;
-		clks->recovery_time = 2;
-		/* minimal values */
-	}
-}
-
 static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	ide_drive_t *pair = ide_get_paired_drive(drive);
 	unsigned long flags;
-	pio_clocks_t first, second;
-	int ax, drdy;
-	u8 cycle1, misc, clk, addr_pio = pio;
+	u8 tim, misc, addr_pio = pio, clk;
+
+	/* DRDY is default 2 (by OPTi Databook) */
+	static const u8 addr_timings[2][4] = {
+		{ 0x20, 0x10, 0x00, 0x00 },	/* 33 MHz */
+		{ 0x10, 0x10, 0x00, 0x00 },	/* 25 MHz */
+	};
+	static const u8 data_rec_timings[2][4] = {
+		{ 0x5b, 0x45, 0x32, 0x21 },	/* 33 MHz */
+		{ 0x48, 0x34, 0x21, 0x10 }	/* 25 MHz */
+	};
 
 	drive->drive_data = XFER_PIO_0 + pio;
 
@@ -230,31 +184,15 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 	printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
 
-	compute_clocks(pio, &first, clk ? 25 : 33);
-	compute_clocks(addr_pio, &second, clk ? 25 : 33);
-
-	/* ax = max(a1,a2) */
-	ax = (first.address_time < second.address_time) ? second.address_time : first.address_time;
-
-	drdy = 2; /* DRDY is default 2 (by OPTi Databook) */
-
-	cycle1 = ((first.data_time-1)<<4)  | (first.recovery_time-2);
-
-	misc = ((ax - 1) << 4) | ((drdy - 2) << 1);
-
-#ifdef OPTI621_DEBUG
-	printk("%s: address: %d, data: %d, "
-		"recovery: %d, drdy: %d [clk]\n",
-		drive->name, ax, first.data_time,
-		first.recovery_time, drdy);
-#endif
+	tim  = data_rec_timings[clk][pio];
+	misc = addr_timings[clk][addr_pio];
 
 	/* select Index-0/1 for Register-A/B */
 	write_reg(drive->select.b.unit, MISC_REG);
 	/* set read cycle timings */
-	write_reg(cycle1, READ_REG);
+	write_reg(tim, READ_REG);
 	/* set write cycle timings */
-	write_reg(cycle1, WRITE_REG);
+	write_reg(tim, WRITE_REG);
 
 	/* use Register-A for drive 0 */
 	/* use Register-B for drive 1 */

From 80a65fc5ee04497e6c28bdaefc44d375b19c4a79 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:22 +0200
Subject: [PATCH 06/12] opti621: add PIO 4 support

* Add PIO 4 support.

While at it:

* Use a single struct ide_port_info instance for OPTi621 and OPTi621X.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/opti621.c | 46 ++++++++++++---------------------------
 1 file changed, 14 insertions(+), 32 deletions(-)

diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 8c715b7a85db..725c80508d90 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -90,16 +90,6 @@
 
 #include <asm/io.h>
 
-//#define OPTI621_MAX_PIO 3
-/* In fact, I do not have any PIO 4 drive
- * (address: 25 ns, data: 70 ns, recovery: 35 ns),
- * but OPTi 82C621 is programmable and it can do (minimal values):
- * on 40MHz PCI bus (pulse 25 ns):
- *  address: 25 ns, data: 25 ns, recovery: 50 ns;
- * on 20MHz PCI bus (pulse 50 ns):
- *  address: 50 ns, data: 50 ns, recovery: 100 ns.
- */
-
 #define READ_REG 0	/* index of Read cycle timing register */
 #define WRITE_REG 1	/* index of Write cycle timing register */
 #define CNTRL_REG 3	/* index of Control register */
@@ -150,13 +140,13 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	u8 tim, misc, addr_pio = pio, clk;
 
 	/* DRDY is default 2 (by OPTi Databook) */
-	static const u8 addr_timings[2][4] = {
-		{ 0x20, 0x10, 0x00, 0x00 },	/* 33 MHz */
-		{ 0x10, 0x10, 0x00, 0x00 },	/* 25 MHz */
+	static const u8 addr_timings[2][5] = {
+		{ 0x20, 0x10, 0x00, 0x00, 0x00 },	/* 33 MHz */
+		{ 0x10, 0x10, 0x00, 0x00, 0x00 },	/* 25 MHz */
 	};
-	static const u8 data_rec_timings[2][4] = {
-		{ 0x5b, 0x45, 0x32, 0x21 },	/* 33 MHz */
-		{ 0x48, 0x34, 0x21, 0x10 }	/* 25 MHz */
+	static const u8 data_rec_timings[2][5] = {
+		{ 0x5b, 0x45, 0x32, 0x21, 0x20 },	/* 33 MHz */
+		{ 0x48, 0x34, 0x21, 0x10, 0x10 }	/* 25 MHz */
 	};
 
 	drive->drive_data = XFER_PIO_0 + pio;
@@ -209,30 +199,22 @@ static const struct ide_port_ops opti621_port_ops = {
 	.set_pio_mode		= opti621_set_pio_mode,
 };
 
-static const struct ide_port_info opti621_chipsets[] __devinitdata = {
-	{	/* 0 */
-		.name		= "OPTI621",
-		.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
-		.port_ops	= &opti621_port_ops,
-		.host_flags	= IDE_HFLAG_NO_DMA,
-		.pio_mask	= ATA_PIO3,
-	}, {	/* 1 */
-		.name		= "OPTI621X",
-		.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
-		.port_ops	= &opti621_port_ops,
-		.host_flags	= IDE_HFLAG_NO_DMA,
-		.pio_mask	= ATA_PIO3,
-	}
+static const struct ide_port_info opti621_chipset __devinitdata = {
+	.name		= "OPTI621/X",
+	.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
+	.port_ops	= &opti621_port_ops,
+	.host_flags	= IDE_HFLAG_NO_DMA,
+	.pio_mask	= ATA_PIO4,
 };
 
 static int __devinit opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	return ide_setup_pci_device(dev, &opti621_chipsets[id->driver_data]);
+	return ide_setup_pci_device(dev, &opti621_chipset);
 }
 
 static const struct pci_device_id opti621_pci_tbl[] = {
 	{ PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 },
-	{ PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 1 },
+	{ PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 0 },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, opti621_pci_tbl);

From c1a8e39819bd6797ee2b82b88517268d39921b03 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:23 +0200
Subject: [PATCH 07/12] ide-pmac: bugfix for media-bay support rework

Fix bug introduced by:

commit 2dde7861afa23cd59db83515cb0b810b92b220aa
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date:   Fri Apr 18 00:46:23 2008 +0200

    ide: rework PowerMac media-bay support (take 2)
...

[ Yeah, I suck. ]

bay->cd_index shouldn't be changed if IDE devices are not present
or retry operations won't happen.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/macintosh/mediabay.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/macintosh/mediabay.c b/drivers/macintosh/mediabay.c
index 82add26cc665..c34bdf852e32 100644
--- a/drivers/macintosh/mediabay.c
+++ b/drivers/macintosh/mediabay.c
@@ -556,7 +556,8 @@ static void media_bay_step(int i)
 				printk("mediabay %d, registering IDE...\n", i);
 				pmu_suspend();
 				ide_port_scan(bay->cd_port);
-				bay->cd_index = bay->cd_port->index;
+				if (bay->cd_port->present)
+					bay->cd_index = bay->cd_port->index;
 				pmu_resume();
 			}
 			if (bay->cd_index == -1) {

From 07a6c66da53f646a39103290bfbd85be18892895 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:23 +0200
Subject: [PATCH 08/12] ide-pmac: add ->cable_detect method

Add ->cable_detect method and remove no longer needed pmif->cable_80 flag
(there is also no need to mask ->udma_mask now).

This fixes:

- forced ignoring of cable detection (needed for some CF devices & debug)

- cable detection for warm-plug

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ppc/pmac.c | 55 ++++++++++++++++++++++++------------------
 1 file changed, 31 insertions(+), 24 deletions(-)

diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 48aa019127bc..7f669a997aa6 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -59,7 +59,6 @@ typedef struct pmac_ide_hwif {
 	int				irq;
 	int				kind;
 	int				aapl_bus_id;
-	unsigned			cable_80 : 1;
 	unsigned			mediabay : 1;
 	unsigned			broken_dma : 1;
 	unsigned			broken_dma_warn : 1;
@@ -918,10 +917,40 @@ pmac_ide_do_resume(ide_hwif_t *hwif)
 	return 0;
 }
 
+static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
+{
+	pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)ide_get_hwifdata(hwif);
+	struct device_node *np = pmif->node;
+	const char *cable = of_get_property(np, "cable-type", NULL);
+
+	/* Get cable type from device-tree. */
+	if (cable && !strncmp(cable, "80-", 3))
+		return ATA_CBL_PATA80;
+
+	/*
+	 * G5's seem to have incorrect cable type in device-tree.
+	 * Let's assume they have a 80 conductor cable, this seem
+	 * to be always the case unless the user mucked around.
+	 */
+	if (of_device_is_compatible(np, "K2-UATA") ||
+	    of_device_is_compatible(np, "shasta-ata"))
+		return ATA_CBL_PATA80;
+
+	return ATA_CBL_PATA40;
+}
+
 static const struct ide_port_ops pmac_ide_ata6_port_ops = {
 	.set_pio_mode		= pmac_ide_set_pio_mode,
 	.set_dma_mode		= pmac_ide_set_dma_mode,
 	.selectproc		= pmac_ide_kauai_selectproc,
+	.cable_detect		= pmac_ide_cable_detect,
+};
+
+static const struct ide_port_ops pmac_ide_ata4_port_ops = {
+	.set_pio_mode		= pmac_ide_set_pio_mode,
+	.set_dma_mode		= pmac_ide_set_dma_mode,
+	.selectproc		= pmac_ide_selectproc,
+	.cable_detect		= pmac_ide_cable_detect,
 };
 
 static const struct ide_port_ops pmac_ide_port_ops = {
@@ -962,7 +991,6 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 	struct ide_port_info d = pmac_port_info;
 
-	pmif->cable_80 = 0;
 	pmif->broken_dma = pmif->broken_dma_warn = 0;
 	if (of_device_is_compatible(np, "shasta-ata")) {
 		pmif->kind = controller_sh_ata6;
@@ -979,6 +1007,7 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 	} else if (of_device_is_compatible(np, "keylargo-ata")) {
 		if (strcmp(np->name, "ata-4") == 0) {
 			pmif->kind = controller_kl_ata4;
+			d.port_ops = &pmac_ide_ata4_port_ops;
 			d.udma_mask = ATA_UDMA4;
 		} else
 			pmif->kind = controller_kl_ata3;
@@ -992,22 +1021,6 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 	bidp = of_get_property(np, "AAPL,bus-id", NULL);
 	pmif->aapl_bus_id =  bidp ? *bidp : 0;
 
-	/* Get cable type from device-tree */
-	if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6
-	    || pmif->kind == controller_k2_ata6
-	    || pmif->kind == controller_sh_ata6) {
-		const char* cable = of_get_property(np, "cable-type", NULL);
-		if (cable && !strncmp(cable, "80-", 3))
-			pmif->cable_80 = 1;
-	}
-	/* G5's seem to have incorrect cable type in device-tree. Let's assume
-	 * they have a 80 conductor cable, this seem to be always the case unless
-	 * the user mucked around
-	 */
-	if (of_device_is_compatible(np, "K2-UATA") ||
-	    of_device_is_compatible(np, "shasta-ata"))
-		pmif->cable_80 = 1;
-
 	/* On Kauai-type controllers, we make sure the FCR is correct */
 	if (pmif->kauai_fcr)
 		writel(KAUAI_FCR_UATA_MAGIC |
@@ -1053,7 +1066,6 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 
 	hwif->hwif_data = pmif;
 	ide_init_port_hw(hwif, hw);
-	hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
 
 	printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n",
 	       hwif->index, model_name[pmif->kind], pmif->aapl_bus_id,
@@ -1070,11 +1082,6 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 		}
 	}
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-	if (pmif->cable_80 == 0)
-		d.udma_mask &= ATA_UDMA2;
-#endif
-
 	idx[0] = hwif->index;
 
 	ide_device_add(idx, &d);

From 5b16464ac32a92c2332030d11ec445bddeb141fa Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:23 +0200
Subject: [PATCH 09/12] ide-pmac: remove bogus comment about
 pmac_ide_setup_device()

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ppc/pmac.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 7f669a997aa6..ba2d58727964 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -978,10 +978,7 @@ static const struct ide_port_info pmac_port_info = {
 
 /*
  * Setup, register & probe an IDE channel driven by this driver, this is
- * called by one of the 2 probe functions (macio or PCI). Note that a channel
- * that ends up beeing free of any device is not kept around by this driver
- * (it is kept in 2.4). This introduce an interface numbering change on some
- * rare machines unfortunately, but it's better this way.
+ * called by one of the 2 probe functions (macio or PCI).
  */
 static int __devinit
 pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)

From 792a1a98560a2a1619491eed8b18fccb09b312a7 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:23 +0200
Subject: [PATCH 10/12] ide-cs: fix probing and add warm-plug support

* Fix probing by using ide_port_scan() and moving "retry loop"
  from ide_config() to idecs_register().

* Don't fail probe if there are no devices attached to a port.

* Remove (now redundant) error message from ide_config().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/legacy/ide-cs.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/ide/legacy/ide-cs.c b/drivers/ide/legacy/ide-cs.c
index aa2ea3deac85..d08107db54d4 100644
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -194,6 +194,16 @@ static ide_hwif_t *idecs_register(unsigned long io, unsigned long ctl,
     if (hwif->present)
 	return hwif;
 
+    /* retry registration in case device is still spinning up */
+    for (i = 0; i < 10; i++) {
+	msleep(100);
+	ide_port_scan(hwif);
+	if (hwif->present)
+	    return hwif;
+    }
+
+    return hwif;
+
 out_release:
     release_region(ctl, 1);
     release_region(io, 8);
@@ -222,7 +232,7 @@ static int ide_config(struct pcmcia_device *link)
 	cistpl_cftable_entry_t dflt;
     } *stk = NULL;
     cistpl_cftable_entry_t *cfg;
-    int i, pass, last_ret = 0, last_fn = 0, is_kme = 0;
+    int pass, last_ret = 0, last_fn = 0, is_kme = 0;
     unsigned long io_base, ctl_base;
     ide_hwif_t *hwif;
 
@@ -319,30 +329,15 @@ static int ide_config(struct pcmcia_device *link)
     if (is_kme)
 	outb(0x81, ctl_base+1);
 
-    /* retry registration in case device is still spinning up */
-    for (i = 0; i < 10; i++) {
-	hwif = idecs_register(io_base, ctl_base, link->irq.AssignedIRQ, link);
-	if (hwif)
-	    break;
-	if (link->io.NumPorts1 == 0x20) {
+     hwif = idecs_register(io_base, ctl_base, link->irq.AssignedIRQ, link);
+     if (hwif == NULL && link->io.NumPorts1 == 0x20) {
 	    outb(0x02, ctl_base + 0x10);
 	    hwif = idecs_register(io_base + 0x10, ctl_base + 0x10,
 				  link->irq.AssignedIRQ, link);
-	    if (hwif) {
-		io_base += 0x10;
-		ctl_base += 0x10;
-		break;
-	    }
-	}
-	msleep(100);
     }
 
-    if (hwif == NULL) {
-	printk(KERN_NOTICE "ide-cs: ide_register() at 0x%3lx & 0x%3lx"
-	       ", irq %u failed\n", io_base, ctl_base,
-	       link->irq.AssignedIRQ);
+    if (hwif == NULL)
 	goto failed;
-    }
 
     info->ndev = 1;
     sprintf(info->node.dev_name, "hd%c", 'a' + hwif->index * 2);

From fbc69fd9b76158daaa83e5372e44fdd81df20f92 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:23 +0200
Subject: [PATCH 11/12] ide-cs: fix releasing I/O resources

hwif content is already freed after ide_release() call so cache
hwif->io_ports.{data,ctl}_addr in local variables in ide_detach().

This fixes post-2.6.25 regression.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/legacy/ide-cs.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/ide/legacy/ide-cs.c b/drivers/ide/legacy/ide-cs.c
index d08107db54d4..f633b6b3c7f3 100644
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -135,13 +135,17 @@ static void ide_detach(struct pcmcia_device *link)
 {
     ide_info_t *info = link->priv;
     ide_hwif_t *hwif = info->hwif;
+    unsigned long data_addr, ctl_addr;
 
     DEBUG(0, "ide_detach(0x%p)\n", link);
 
+    data_addr = hwif->io_ports.data_addr;
+    ctl_addr  = hwif->io_ports.ctl_addr;
+
     ide_release(link);
 
-    release_region(hwif->io_ports.ctl_addr, 1);
-    release_region(hwif->io_ports.data_addr, 8);
+    release_region(ctl_addr, 1);
+    release_region(data_addr, 8);
 
     kfree(info);
 } /* ide_detach */

From 0cbccbc30a60ff60dbeb203154f1f527c632de9b Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Sun, 15 Jun 2008 21:00:24 +0200
Subject: [PATCH 12/12] ide-generic: don't probe all legacy ISA IDE ports by
 default

We can't probe all legacy ISA IDE ports by default as the resources may be
occupied by other ISA devices.  Add "probe_mask" module parameter and probe
only first two ISA IDE ports by default leaving the decision about probing
the rest to the user (systems with ISA ide2-6 should be very, very rare).

This fixes a regression caused by:

commit 343a3451e20314d5959b59b992e33fbaadfe52bf
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date:   Tue Jun 10 20:56:36 2008 +0200

    ide-generic: add missing hwif->chipset setup
...

Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Bisected-by: Mikael Pettersson <mikpe@it.uu.se>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-generic.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 9134488ac043..2d92214096ab 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -22,6 +22,10 @@
 
 #define DRV_NAME	"ide_generic"
 
+static int probe_mask = 0x03;
+module_param(probe_mask, int, 0);
+MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
+
 static ssize_t store_add(struct class *cls, const char *buf, size_t n)
 {
 	ide_hwif_t *hwif;
@@ -89,6 +93,9 @@ static int __init ide_generic_init(void)
 	u8 idx[MAX_HWIFS];
 	int i;
 
+	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
+			 "parameter for probing all legacy ISA IDE ports\n");
+
 	for (i = 0; i < MAX_HWIFS; i++) {
 		ide_hwif_t *hwif;
 		unsigned long io_addr = ide_default_io_base(i);
@@ -96,7 +103,7 @@ static int __init ide_generic_init(void)
 
 		idx[i] = 0xff;
 
-		if (io_addr) {
+		if ((probe_mask & (1 << i)) && io_addr) {
 			if (!request_region(io_addr, 8, DRV_NAME)) {
 				printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
 						"not free.\n",