From a094d41047593399383d19e1491c4d87a86e5b0c Mon Sep 17 00:00:00 2001
From: Marcus Overhagen <marcusoverhagen@gmail.com>
Date: Wed, 9 Jan 2008 19:26:05 +0000
Subject: [PATCH] Rewrote bus state functions, commented out much code to make
 it compile. Moved bus_reset from basic_protocol.c into ata.c

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23324 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/add-ons/kernel/bus_managers/ata/ata.c     | 345 +++++++++++++---
 src/add-ons/kernel/bus_managers/ata/atapi.c   |   4 +
 .../kernel/bus_managers/ata/basic_protocol.c  | 372 ------------------
 src/add-ons/kernel/bus_managers/ata/devices.c |  12 +-
 src/add-ons/kernel/bus_managers/ata/dma.c     |   5 +
 .../kernel/bus_managers/ata/ide_internal.h    |  46 +--
 src/add-ons/kernel/bus_managers/ata/ide_sim.c |  31 +-
 src/add-ons/kernel/bus_managers/ata/queuing.c |  75 ----
 .../kernel/bus_managers/ata/scsi2ata.c        |   8 +
 src/add-ons/kernel/bus_managers/ata/sync.c    |  45 +--
 10 files changed, 355 insertions(+), 588 deletions(-)
 delete mode 100644 src/add-ons/kernel/bus_managers/ata/basic_protocol.c
 delete mode 100644 src/add-ons/kernel/bus_managers/ata/queuing.c

diff --git a/src/add-ons/kernel/bus_managers/ata/ata.c b/src/add-ons/kernel/bus_managers/ata/ata.c
index a2b445b276..05eeae828f 100644
--- a/src/add-ons/kernel/bus_managers/ata/ata.c
+++ b/src/add-ons/kernel/bus_managers/ata/ata.c
@@ -16,6 +16,7 @@
 #include "ide_cmds.h"
 
 #define TRACE dprintf
+#define FLOW dprintf
 
 void
 ata_select_device(ide_bus_info *bus, int device)
@@ -30,6 +31,17 @@ ata_select_device(ide_bus_info *bus, int device)
 }
 
 
+void
+ata_select(ide_device_info *device)
+{
+//	ata_select_device(device->bus, device->is_device1);
+
+
+	ASSERT(device->is_device1 == device->tf.chs.device);
+	device->bus->controller->write_command_block_regs(device->bus->channel_cookie, &device->tf, ide_mask_device_head);
+}
+
+
 bool
 ata_is_device_present(ide_bus_info *bus, int device)
 {
@@ -51,21 +63,259 @@ ata_is_device_present(ide_bus_info *bus, int device)
 }
 
 
-/*
-
-void
-ata_select_device(ide_device_info *device)
+/**	busy-wait for device
+ *	set       - bits of status register that must be set
+ *	cleared   - bits of status register that must be cleared
+ *	check_err - abort if error bit is set
+ *	timeout   - waiting timeout
+ */
+status_t
+ata_wait(ide_bus_info *bus, uint8 set, uint8 cleared,
+		 bool check_err, bigtime_t timeout)
 {
-	ide_task_file tf;
-	tf.chs.head = 0;
-	tf.chs.mode = ide_mode_lba;
-	tf.chs.device = device->is_device1;
+	bigtime_t startTime = system_time();
+	bigtime_t elapsedTime;
+	uint8 status;
 
-	device->bus->controller->read_command_block_regs(device->bus->channel_cookie, &tf, 
-		ide_mask_device_head);
-	spin(1); // wait 400 nsec
+	spin(1); // device needs 400ns to set status
+
+	for (;;) {
+		status = bus->controller->get_altstatus(bus->channel_cookie);
+
+		if (check_err && (status & ide_status_err) != 0)
+			return B_ERROR;
+
+		if ((status & set) == set && (status & cleared) == 0)
+			return B_OK;
+
+		elapsedTime = system_time() - startTime;
+
+		if (elapsedTime > timeout)
+			return B_TIMED_OUT;
+		
+		if (elapsedTime < 5000)
+			spin(1);
+		else
+			snooze(5000);
+	}
+}
+
+
+// busy-wait for data request going high
+status_t
+ata_wait_for_drq(ide_bus_info *bus)
+{
+	return ata_wait(bus, ide_status_drq, 0, true, 10000000);
+}
+
+
+// busy-wait for data request going low
+status_t
+ata_wait_for_drqdown(ide_bus_info *bus)
+{
+	return ata_wait(bus, 0, ide_status_drq, true, 1000000);
+}
+
+
+// busy-wait for device ready
+status_t
+ata_wait_for_drdy(ide_bus_info *bus)
+{
+	return ata_wait(bus, ide_status_drdy, ide_status_bsy, false, 5000000);
+}
+
+
+status_t
+ata_send_command(ide_device_info *device, ide_qrequest *qrequest,
+	bool need_drdy, uint32 timeout, ata_bus_state new_state)
+{
+	ide_bus_info *bus = device->bus;
+
+	ASSERT((device->tf_param_mask & ide_mask_command) == 0);
+	ASSERT(new_state == ata_state_pio || new_state == ata_state_dma);
+	ASSERT(bus->state == ata_state_busy);
+
+	ASSERT(new_state == ata_state_pio); // XXX only pio for now
+
+	FAST_LOGN(bus->log, ev_ide_send_command, 15, device->is_device1, (uint32)qrequest, 
+		device->tf.raw.r[0], device->tf.raw.r[1], device->tf.raw.r[2], 
+		device->tf.raw.r[3], device->tf.raw.r[4], device->tf.raw.r[5], 
+		device->tf.raw.r[6], 
+		device->tf.raw.r[7], device->tf.raw.r[8], device->tf.raw.r[9], 
+		device->tf.raw.r[10], device->tf.raw.r[11]);
+
+	TRACE("ata_send_command: qrequest %p, request %p\n", qrequest, qrequest ? qrequest->request : NULL);
+
+	// disable Interrupts for PIO transfers
+	if (new_state == ata_state_pio) {
+		if (bus->controller->write_device_control(bus->channel_cookie, ide_devctrl_bit3 | ide_devctrl_nien) != B_OK)
+			goto err;
+	}
+
+	ata_select(device);
+
+	bus->active_device = device;
+
+	if (ata_wait(bus, 0, ide_status_bsy | ide_status_drq, false, 50000) != B_OK) {
+		// resetting the device here will discard current configuration,
+		// it's better when the SCSI bus manager requests an external reset.
+		TRACE("device selection timeout\n");
+		device->subsys_status = SCSI_SEL_TIMEOUT;
+		return B_ERROR;		
+	}
+
+	if (need_drdy && (bus->controller->get_altstatus(bus->channel_cookie) & ide_status_drdy) == 0) {
+		TRACE("drdy not set\n");
+		device->subsys_status = SCSI_SEQUENCE_FAIL;
+		return B_ERROR;
+	}
+
+	// write parameters	
+	if (bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf,	device->tf_param_mask) != B_OK)
+		goto err;
+
+	FLOW("Writing command 0x%02x", (int)device->tf.write.command);
+
+	IDE_LOCK(bus);
+
+	if (new_state == ata_state_dma) {
+		if (bus->controller->write_device_control(bus->channel_cookie,	ide_devctrl_bit3) != B_OK)
+			goto err_clearint;
+	}
+
+	// start the command
+	if (bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf, ide_mask_command) != B_OK) 
+		goto err_clearint;
+
+	ASSERT(bus->state == ata_state_busy);
+
+	bus->state = new_state;
+
+	IDE_UNLOCK(bus);
+
+	return B_OK;
+
+
+
+err_clearint:
+	bus->controller->write_device_control(bus->channel_cookie, ide_devctrl_bit3 | ide_devctrl_nien);
+
+err:
+	device->subsys_status = SCSI_HBA_ERR;
+	IDE_UNLOCK(bus);
+	return B_ERROR;
+}
+
+
+status_t
+ata_reset_bus(ide_bus_info *bus, bool *_devicePresent0, uint32 *_sigDev0, bool *_devicePresent1, uint32 *_sigDev1)
+{
+	ide_controller_interface *controller = bus->controller;
+	ide_channel_cookie channel = bus->channel_cookie;
+	bool devicePresent0;
+	bool devicePresent1;
+	ide_task_file tf;
+	status_t status;
+
+	dprintf("ATA: reset_bus %p\n", bus);
+
+	devicePresent0 = ata_is_device_present(bus, 0);
+	devicePresent1 = ata_is_device_present(bus, 1);
+
+	dprintf("ATA: reset_bus: ata_is_device_present device 0, present %d\n", devicePresent0);
+	dprintf("ATA: reset_bus: ata_is_device_present device 1, present %d\n", devicePresent1);
+
+	// disable interrupts and assert SRST for at least 5 usec
+	if (controller->write_device_control(channel, ide_devctrl_bit3 | ide_devctrl_nien | ide_devctrl_srst) != B_OK)
+		goto error;
+	spin(20);
+
+	// clear SRST and wait for at least 2 ms but (we wait 150ms like everyone else does)
+	if (controller->write_device_control(channel, ide_devctrl_bit3 | ide_devctrl_nien) != B_OK)
+		goto error;
+	snooze(150000);
+
+	if (devicePresent0) {
+
+		ata_select_device(bus, 0);
+		dprintf("altstatus device 0: %x\n", controller->get_altstatus(channel));
+
+		// wait up to 31 seconds for busy to clear, abort when error is set
+		status = ata_wait(bus, 0, ide_status_bsy, false, 31000000);
+		if (status != B_OK) {
+			dprintf("ATA: reset_bus: timeout\n");
+			goto error;
+		}
+
+		if (controller->read_command_block_regs(channel, &tf, ide_mask_sector_count |
+			ide_mask_LBA_low | ide_mask_LBA_mid | ide_mask_LBA_high | ide_mask_error) != B_OK)
+			goto error;
+
+		if (tf.read.error != 0x01 && tf.read.error != 0x81)
+			dprintf("ATA: device 0 failed, error code is 0x%02x\n", tf.read.error);
+
+		if (tf.read.error >= 0x80)
+			dprintf("ATA: device 0 indicates that device 1 failed, error code is 0x%02x\n", tf.read.error);
+
+		if (_sigDev0) {
+			*_sigDev0 = tf.lba.sector_count;
+			*_sigDev0 |= ((uint32)tf.lba.lba_0_7) << 8;
+			*_sigDev0 |= ((uint32)tf.lba.lba_8_15) << 16;
+			*_sigDev0 |= ((uint32)tf.lba.lba_16_23) << 24;
+		}
+	}
+
+	if (devicePresent1) {	
+		
+		ata_select_device(bus, 1);
+		dprintf("altstatus device 1: %x\n", controller->get_altstatus(channel));
+
+		// wait up to 31 seconds for busy to clear, abort when error is set
+		status = ata_wait(bus, 0, ide_status_bsy, false, 31000000);
+		if (status != B_OK) {
+			dprintf("ATA: reset_bus: timeout\n");
+			goto error;
+		}
+
+		if (controller->read_command_block_regs(channel, &tf, ide_mask_sector_count |
+			ide_mask_LBA_low | ide_mask_LBA_mid | ide_mask_LBA_high | ide_mask_error) != B_OK)
+			goto error;
+
+		if (tf.read.error != 0x01)
+			dprintf("ATA: device 1 failed, error code is 0x%02x\n", tf.read.error);
+
+		if (_sigDev1) {
+			*_sigDev1 = tf.lba.sector_count;
+			*_sigDev1 |= ((uint32)tf.lba.lba_0_7) << 8;
+			*_sigDev1 |= ((uint32)tf.lba.lba_8_15) << 16;
+			*_sigDev1 |= ((uint32)tf.lba.lba_16_23) << 24;
+		}
+	}
+
+	if (_devicePresent0)
+		*_devicePresent0 = devicePresent0;
+	if (_devicePresent1)
+		*_devicePresent1 = devicePresent1;
+
+	dprintf("ATA: reset_bus done\n");
+	return B_OK;
+
+error:
+	dprintf("ATA: reset_bus failed\n");
+	return B_ERROR;
+}
+
+
+status_t
+ata_reset_device(ide_device_info *device, bool *_devicePresent)
+{
+	// XXX first try to reset the single device here
+
+	dprintf("ATA: ata_reset_device %p calling ata_reset_bus\n", device);
+	return ata_reset_bus(device->bus, 
+				device->is_device1 ? NULL : _devicePresent, NULL,
+				device->is_device1 ? _devicePresent : NULL, NULL);
 }
-*/
 
 
 /** verify that device is ready for further PIO transmission */
@@ -92,6 +342,7 @@ check_rw_status(ide_device_info *device, bool drqStatus)
 }
 
 
+#if 0
 /**	DPC called at
  *	 - begin of each PIO read/write block
  *	 - end of PUI write transmission
@@ -140,7 +391,7 @@ ata_dpc_PIO(ide_qrequest *qrequest)
 		// so we better start waiting too early; as we are in service thread,
 		// a DPC initiated by IRQ cannot overtake us, so there is no need to block
 		// IRQs during sent
-		start_waiting_nolock(device->bus, timeout, ide_state_async_waiting);
+		start_waiting_nolock(device->bus, timeout, ata_state_async_waiting);
 
 		// having a too short data buffer shouldn't happen here
 		// anyway - we are prepared
@@ -152,7 +403,7 @@ ata_dpc_PIO(ide_qrequest *qrequest)
 	} else {
 		if (device->left_blocks > 1) {
 			// start async waiting for next command (see above)
-			start_waiting_nolock(device->bus, timeout, ide_state_async_waiting);
+			start_waiting_nolock(device->bus, timeout, ata_state_async_waiting);
 		}
 
 		// see write
@@ -183,7 +434,7 @@ finish:
 	finish_checksense(qrequest);
 }
 
-
+#endif
 /** DPC called when IRQ was fired at end of DMA transmission */
 
 void
@@ -358,19 +609,6 @@ ata_send_rw(ide_device_info *device, ide_qrequest *qrequest,
 		if (!prepare_dma(device, qrequest)) {
 			// fall back to PIO on error
 
-/*
-			// if command queueing is used and there is another command
-			// already running, we cannot fallback to PIO immediately -> declare
-			// command as not queuable and resubmit it, so the scsi bus manager
-			// will block other requests on retry
-			// (XXX this is not fine if the caller wants to recycle the CCB)
-			if (device->num_running_reqs > 1) {
-				qrequest->request->flags &= ~SCSI_ORDERED_QTAG;
-				finish_retry(qrequest);
-				return;
-			}
-*/
-
 			qrequest->uses_dma = false;
 		}
 	}
@@ -388,12 +626,8 @@ ata_send_rw(ide_device_info *device, ide_qrequest *qrequest,
 	timeout = qrequest->request->timeout > 0 ? 
 		qrequest->request->timeout : IDE_STD_TIMEOUT;
 
-	// in DMA mode, we continue with "accessing",
-	// on PIO read, we continue with "async waiting"
-	// on PIO write, we continue with "accessing"
-	if (!send_command(device, qrequest, !device->is_atapi, timeout,
-			(!qrequest->uses_dma && !qrequest->is_write) ?
-				ide_state_async_waiting : ide_state_accessing)) 
+	if (ata_send_command(device, qrequest, !device->is_atapi, timeout,
+			qrequest->uses_dma ? ata_state_dma : ata_state_pio) != B_OK) 
 		goto err_send;
 
 	if (qrequest->uses_dma) {
@@ -439,6 +673,7 @@ err_send:
 bool
 check_rw_error(ide_device_info *device, ide_qrequest *qrequest)
 {
+#if 0
 	ide_bus_info *bus = device->bus;
 	uint8 status;
 
@@ -503,7 +738,7 @@ check_rw_error(ide_device_info *device, ide_qrequest *qrequest)
 		set_sense(device, SCSIS_KEY_HARDWARE_ERROR, SCSIS_ASC_INTERNAL_FAILURE);
 		return true;
 	}
-
+#endif
 	return false;
 }
 
@@ -518,6 +753,7 @@ bool
 check_output(ide_device_info *device, bool drdy_required,
 	int error_mask, bool is_write)
 {
+#if 0
 	ide_bus_info *bus = device->bus;
 	uint8 status;
 
@@ -602,7 +838,7 @@ check_output(ide_device_info *device, bool drdy_required,
 		set_sense(device, SCSIS_KEY_HARDWARE_ERROR, SCSIS_ASC_INTERNAL_FAILURE);
 		return false;
 	}
-
+#endif
 	return true;
 }
 
@@ -614,23 +850,27 @@ check_output(ide_device_info *device, bool drdy_required,
 static bool
 device_set_feature(ide_device_info *device, int feature)
 {
+#if 0
 	device->tf_param_mask = ide_mask_features;
 
 	device->tf.write.features = feature;
 	device->tf.write.command = IDE_CMD_SET_FEATURES;
 
-	if (!send_command(device, NULL, true, 1, ide_state_sync_waiting))
+	if (!send_command(device, NULL, true, 1, ata_state_sync_waiting))
 		return false;
 
 	wait_for_sync(device->bus);
 
 	return check_output(device, true, ide_error_abrt, false);
+#endif
+	return true;
 }
 
 
 static bool
 configure_rmsn(ide_device_info *device)
 {
+#if 0
 	ide_bus_info *bus = device->bus;
 	int i;
 
@@ -652,7 +892,7 @@ configure_rmsn(ide_device_info *device)
 		device->tf_param_mask = 0;
 		device->tf.write.command = IDE_CMD_GET_MEDIA_STATUS;
 
-		if (!send_command(device, NULL, true, 15, ide_state_sync_waiting))
+		if (!send_command(device, NULL, true, 15, ata_state_sync_waiting))
 			continue;
 
 		if (check_output(device, true,
@@ -663,6 +903,8 @@ configure_rmsn(ide_device_info *device)
 	}
 
 	return false;
+#endif
+	return true;
 }
 
 
@@ -758,25 +1000,12 @@ ata_read_infoblock(ide_device_info *device, bool isAtapi)
 
 	TRACE("ata_read_infoblock: bus %p, device %d, isAtapi %d\n", device->bus, device->is_device1, isAtapi);
 
-	// disable interrupts
-	bus->controller->write_device_control(bus->channel_cookie, ide_devctrl_bit3 | ide_devctrl_nien);
-
-	// initialize device selection flags,
-	// this is the only place where this bit gets initialized in the task file
-	if (bus->controller->read_command_block_regs(bus->channel_cookie, &device->tf,
-			ide_mask_device_head) != B_OK) {
-		TRACE("ata_read_infoblock: read_command_block_regs failed\n");
-		goto error;
-	}
-
-	ata_select_device(device->bus, device->is_device1);
-
-	device->tf.lba.device = device->is_device1; // XXX fix me
+	ata_select(device);
 
 	device->tf_param_mask = 0;
 	device->tf.write.command = isAtapi ? IDE_CMD_IDENTIFY_PACKET_DEVICE	: IDE_CMD_IDENTIFY_DEVICE;
 
-	if (!send_command(device, NULL, isAtapi ? false : true, 20, ide_state_accessing)) {
+	if (ata_send_command(device, NULL, isAtapi ? false : true, 20, ata_state_pio) != B_OK) {
 		TRACE("ata_read_infoblock: send_command failed\n");
 		goto error;
 	}
@@ -790,14 +1019,13 @@ ata_read_infoblock(ide_device_info *device, bool isAtapi)
 	bus->controller->read_pio(bus->channel_cookie, (uint16 *)&device->infoblock, 
 		sizeof(device->infoblock) / sizeof(uint16), false);
 
-	if (!wait_for_drqdown(device)) {
-		TRACE("ata_read_infoblock: wait_for_drqdown failed\n");
+	if (ata_wait_for_drqdown(bus) != B_OK) {
+		TRACE("ata_read_infoblock: ata_wait_for_drqdown failed\n");
 		goto error;
 	}
 
 	IDE_LOCK(bus);
-	bus->state = ide_state_idle;
-	cancel_timer(&bus->timer.te);
+	bus->state = ata_state_idle;
 	IDE_UNLOCK(bus);
 
 	TRACE("ata_read_infoblock: success\n");
@@ -805,8 +1033,7 @@ ata_read_infoblock(ide_device_info *device, bool isAtapi)
 
 error:
 	IDE_LOCK(bus);
-	bus->state = ide_state_idle;
-	cancel_timer(&bus->timer.te);
+	bus->state = ata_state_idle;
 	IDE_UNLOCK(bus);
 	return B_ERROR;
 }
diff --git a/src/add-ons/kernel/bus_managers/ata/atapi.c b/src/add-ons/kernel/bus_managers/ata/atapi.c
index 4d58684960..6d375fce2e 100644
--- a/src/add-ons/kernel/bus_managers/ata/atapi.c
+++ b/src/add-ons/kernel/bus_managers/ata/atapi.c
@@ -92,6 +92,7 @@ check_packet_error(ide_device_info *device, ide_qrequest *qrequest)
 void
 packet_dpc(ide_qrequest *qrequest)
 {
+#if 0
 	ide_device_info *device = qrequest->device;
 	ide_bus_info *bus = device->bus;
 	int status;
@@ -259,6 +260,7 @@ err_cancel_timer:
 	cancel_irq_timeout(device->bus);
 err:
 	finish_checksense(qrequest);
+#endif
 }
 
 
@@ -288,6 +290,7 @@ create_packet_taskfile(ide_device_info *device, ide_qrequest *qrequest,
 void
 send_packet(ide_device_info *device, ide_qrequest *qrequest, bool write)
 {
+#if 0
 	ide_bus_info *bus = device->bus;
 	bool packet_irq = device->atapi.packet_irq;
 	uint8 scsi_cmd = device->packet[0];
@@ -431,6 +434,7 @@ err_setup:
 		abort_dma(device, qrequest);
 
 	finish_checksense(qrequest);
+#endif
 }
 
 
diff --git a/src/add-ons/kernel/bus_managers/ata/basic_protocol.c b/src/add-ons/kernel/bus_managers/ata/basic_protocol.c
deleted file mode 100644
index 2d9d7bcb81..0000000000
--- a/src/add-ons/kernel/bus_managers/ata/basic_protocol.c
+++ /dev/null
@@ -1,372 +0,0 @@
-/*
- * Copyright 2002/03, Thomas Kurschel. All rights reserved.
- * Distributed under the terms of the MIT License.
- */
-
-/*
-	Part of Open IDE bus manager
-
-	Basic ATA/ATAPI protocol functions
-*/
-
-
-#include "ide_internal.h"
-#include <scsi_cmds.h>
-
-#include "ide_sim.h"
-#include "ide_cmds.h"
-
-
-// time in µs an IDE interrupt may get delayed
-// as this is used for waiting in normal code, this applies to hardware delays only
-// it's used for a hardware bug fix as well, see send_command
-#define MAX_IRQ_DELAY 50
-
-// maximum number send tries before giving up
-#define MAX_FAILED_SEND 1
-
-
-/** busy-wait for data request going high */
-
-bool
-wait_for_drq(ide_device_info *device)
-{
-	return ide_wait(device, ide_status_drq, 0, true, 10000000);
-}
-
-
-/** busy-wait for data request going low */
-
-bool
-wait_for_drqdown(ide_device_info *device)
-{
-	return ide_wait(device, 0, ide_status_drq, true, 1000000);
-}
-
-
-/** busy-wait for device ready */
-
-bool
-wait_for_drdy(ide_device_info *device)
-{
-	return ide_wait(device, ide_status_drdy, ide_status_bsy, false, 5000000);
-}
-
-
-status_t
-reset_bus(ide_bus_info *bus, bool *devicePresent0, uint32 *sigDev0, bool *devicePresent1, uint32 *sigDev1)
-{
-	ide_controller_interface *controller = bus->controller;
-	ide_channel_cookie channel = bus->channel_cookie;
-	ide_task_file tf;
-	status_t status;
-
-	dprintf("ATA: reset_bus %p\n", bus);
-
-	*devicePresent0 = ata_is_device_present(bus, 0);
-	*devicePresent1 = ata_is_device_present(bus, 1);
-
-	dprintf("ATA: reset_bus: ata_is_device_present device 0, present %d\n", *devicePresent0);
-	dprintf("ATA: reset_bus: ata_is_device_present device 1, present %d\n", *devicePresent1);
-
-	// disable interrupts and assert SRST for at least 5 usec
-	if (controller->write_device_control(channel, ide_devctrl_bit3 | ide_devctrl_nien | ide_devctrl_srst) != B_OK)
-		goto error;
-	spin(20);
-
-	// clear SRST and wait for at least 2 ms but (we wait 150ms like everyone else does)
-	if (controller->write_device_control(channel, ide_devctrl_bit3 | ide_devctrl_nien) != B_OK)
-		goto error;
-	snooze(150000);
-
-	if (*devicePresent0) {
-
-		ata_select_device(bus, 0);
-		dprintf("altstatus device 0: %x\n", controller->get_altstatus(channel));
-
-		// wait up to 31 seconds for busy to clear, abort when error is set
-		status = ata_wait(bus, 0, ide_status_bsy, false, 31000000);
-		if (status != B_OK) {
-			dprintf("ATA: reset_bus: timeout\n");
-			goto error;
-		}
-
-		if (controller->read_command_block_regs(channel, &tf, ide_mask_sector_count |
-			ide_mask_LBA_low | ide_mask_LBA_mid | ide_mask_LBA_high | ide_mask_error) != B_OK)
-			goto error;
-
-		if (tf.read.error != 0x01 && tf.read.error != 0x81)
-			dprintf("ATA: device 0 failed, error code is 0x%02x\n", tf.read.error);
-
-		if (tf.read.error >= 0x80)
-			dprintf("ATA: device 0 indicates that device 1 failed, error code is 0x%02x\n", tf.read.error);
-
-		*sigDev0 = tf.lba.sector_count;
-		*sigDev0 |= ((uint32)tf.lba.lba_0_7) << 8;
-		*sigDev0 |= ((uint32)tf.lba.lba_8_15) << 16;
-		*sigDev0 |= ((uint32)tf.lba.lba_16_23) << 24;
-	} else {
-		*sigDev0 = 0;
-	}
-
-	if (*devicePresent1) {	
-		
-		ata_select_device(bus, 1);
-		dprintf("altstatus device 1: %x\n", controller->get_altstatus(channel));
-
-		// wait up to 31 seconds for busy to clear, abort when error is set
-		status = ata_wait(bus, 0, ide_status_bsy, false, 31000000);
-		if (status != B_OK) {
-			dprintf("ATA: reset_bus: timeout\n");
-			goto error;
-		}
-
-		if (controller->read_command_block_regs(channel, &tf, ide_mask_sector_count |
-			ide_mask_LBA_low | ide_mask_LBA_mid | ide_mask_LBA_high | ide_mask_error) != B_OK)
-			goto error;
-
-		if (tf.read.error != 0x01)
-			dprintf("ATA: device 1 failed, error code is 0x%02x\n", tf.read.error);
-
-		*sigDev1 = tf.lba.sector_count;
-		*sigDev1 |= ((uint32)tf.lba.lba_0_7) << 8;
-		*sigDev1 |= ((uint32)tf.lba.lba_8_15) << 16;
-		*sigDev1 |= ((uint32)tf.lba.lba_16_23) << 24;
-	} else {
-		*sigDev1 = 0;
-	}
-
-	dprintf("ATA: reset_bus done\n");
-
-	return B_OK;
-
-error:
-
-	dprintf("ATA: reset_bus failed\n");
-	return B_ERROR;
-}
-
-
-/** new_state must be either accessing, async_waiting or sync_waiting
- *	param_mask must not include command register
- */
-
-bool
-send_command(ide_device_info *device, ide_qrequest *qrequest,
-	bool need_drdy, uint32 timeout, ide_bus_state new_state)
-{
-	ide_bus_info *bus = device->bus;
-	bigtime_t irq_disabled_at = 0; // make compiler happy
-	uint8 num_retries = 0;
-	bool irq_guard;
-
-	FAST_LOGN(bus->log, ev_ide_send_command, 15, device->is_device1, (uint32)qrequest, 
-		device->tf.raw.r[0], device->tf.raw.r[1], device->tf.raw.r[2], 
-		device->tf.raw.r[3], device->tf.raw.r[4], device->tf.raw.r[5], 
-		device->tf.raw.r[6], 
-		device->tf.raw.r[7], device->tf.raw.r[8], device->tf.raw.r[9], 
-		device->tf.raw.r[10], device->tf.raw.r[11]);
-
-retry:
-	irq_guard = bus->num_running_reqs > 1;
-
-	SHOW_FLOW(3, "qrequest=%p, request=%p", qrequest,
-		qrequest ? qrequest->request : NULL);
-
-	// if there are pending requests, IRQs must be disabled to
-	// not mix up IRQ reasons
-	// XXX can we avoid that with the IDE_LOCK trick? It would
-	//     save some work and the bug workaround!
-	if (irq_guard) {
-		if (bus->controller->write_device_control(bus->channel_cookie,
-				ide_devctrl_nien | ide_devctrl_bit3) != B_OK)
-			goto err;
-
-		irq_disabled_at = system_time();
-	}
-
-	// select device
-	if (bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf,
-			ide_mask_device_head) != B_OK)
-		goto err;
-
-	bus->active_device = device;
-
-	if (!ide_wait(device, 0, ide_status_bsy | ide_status_drq, false, 50000)) {
-		uint8 status;
-
-		SHOW_FLOW0(1, "device is not ready");
-
-		status = bus->controller->get_altstatus(bus->channel_cookie);
-		if (status == 0xff) {
-			// there is no device (should happen during detection only)
-			SHOW_FLOW0(1, "there is no device");
-
-			// device detection recognizes this code as "all hope lost", so
-			// neither replace it nor use it anywhere else
-			device->subsys_status = SCSI_TID_INVALID;
-			return false;
-		}
-
-/*
-		// reset device and retry
-		if (reset_device(device, qrequest) && ++num_retries <= MAX_FAILED_SEND) {
-			SHOW_FLOW0(1, "retrying");
-			goto retry;
-		}
-*/
-		SHOW_FLOW0(1, "giving up");
-
-		// reset to often - abort request
-		device->subsys_status = SCSI_SEL_TIMEOUT;
-		return false;
-	}
-
-	if (need_drdy
-		&& (bus->controller->get_altstatus(bus->channel_cookie) & ide_status_drdy) == 0) {
-		SHOW_FLOW0(3, "drdy not set");
-		device->subsys_status = SCSI_SEQUENCE_FAIL;
-		return false;
-	}
-
-	// write parameters	
-	if (bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf,
-			device->tf_param_mask) != B_OK)
-		goto err;
-
-	if (irq_guard) {
-		// IRQ may be fired by service requests and by the process of disabling(!)
-		// them (I heard this is caused by edge triggered PCI IRQs)
-
-		// wait at least 50 µs to catch all pending irq's
-		// (at my system, up to 30 µs elapsed)
-
-		// additionally, old drives (at least my IBM-DTTA-351010) loose
-		// sync if they are pushed too hard - on heavy overlapped write 
-		// stress this drive tends to forget outstanding requests,
-		// waiting at least 50 µs seems(!) to solve this
-		while (system_time() - irq_disabled_at < MAX_IRQ_DELAY)
-			spin(1);
-	}
-
-	// if we will start waiting once the command is sent, we have to
-	// lock the bus before sending; this way, IRQs that are fired
-	// shortly before/after sending of command are delayed until the
-	// command is really sent (start_waiting unlocks the bus) and then
-	// the IRQ handler can check savely whether the IRQ really signals 
-	// finishing of command or not by testing the busy-signal of the device
-	if (new_state != ide_state_accessing) {
-		IDE_LOCK(bus);
-	}
-
-	if (irq_guard) {
-		// now it's clear why IRQs gets fired, so we can enable them again
-		if (bus->controller->write_device_control(bus->channel_cookie,
-				ide_devctrl_bit3) != B_OK)
-			goto err1;
-	}
-
-	// write command code - this will start the actual command	
-	SHOW_FLOW(3, "Writing command 0x%02x", (int)device->tf.write.command);
-	if (bus->controller->write_command_block_regs(bus->channel_cookie,
-			&device->tf, ide_mask_command) != B_OK) 
-		goto err1;
-
-	// start waiting now; also un-blocks IRQ handler (see above)
-	if (new_state != ide_state_accessing)
-		start_waiting(bus, timeout, new_state);
-
-	return true;
-
-err1:
-	if (timeout > 0) {
-		bus->state = ide_state_accessing;
-		IDE_UNLOCK(bus);
-	}
-
-err:
-	device->subsys_status = SCSI_HBA_ERR;
-	return false;
-}
-
-
-status_t
-ata_wait(ide_bus_info *bus, uint8 mask, uint8 not_mask,
-		 bool check_err, bigtime_t timeout)
-{
-	bigtime_t startTime = system_time();
-	bigtime_t elapsedTime;
-	uint8 status;
-
-	spin(1); // device needs 400ns to set status
-
-	for (;;) {
-
-		status = bus->controller->get_altstatus(bus->channel_cookie);
-
-		if (check_err && (status & ide_status_err) != 0)
-			return B_ERROR;
-
-		if ((status & mask) == mask && (status & not_mask) == 0)
-			return B_OK;
-
-		elapsedTime = system_time() - startTime;
-
-		if (elapsedTime > timeout)
-			return B_TIMED_OUT;
-		
-		if (elapsedTime < 5000)
-			spin(1);
-		else
-			snooze(5000);
-	}
-}
-
-
-/**	busy-wait for device
- *	mask - bits of status register that must be set
- *	not_mask - bits of status register that must not be set
- *	check_err - abort if error bit is set
- *	timeout - waiting timeout
- *	return: true on success
- */
-
-bool
-ide_wait(ide_device_info *device, int mask, int not_mask,
-	bool check_err, bigtime_t timeout)
-{
-	ide_bus_info *bus = device->bus;
-	bigtime_t start_time = system_time();
-
-	while (1) {
-		bigtime_t elapsed_time;
-		int status;
-
-		// do spin before test as the device needs 400 ns 
-		// to update its status register
-		spin(1);
-
-		status = bus->controller->get_altstatus(bus->channel_cookie);
-
-		if ((status & mask) == mask && (status & not_mask) == 0)
-			return true;
-
-		if (check_err && (status & ide_status_err) != 0) {
-			set_sense(device, SCSIS_KEY_HARDWARE_ERROR, SCSIS_ASC_INTERNAL_FAILURE);
-			return false;
-		}
-
-		elapsed_time = system_time() - start_time;
-
-		if (elapsed_time > timeout) {
-			set_sense(device, SCSIS_KEY_HARDWARE_ERROR, SCSIS_ASC_LUN_TIMEOUT);
-			return false;
-		}
-
-		// if we've waited more then 5ms, we start passive waiting
-		// to reduce system load
-		if (elapsed_time > 5000)
-			snooze(elapsed_time / 10);
-	}
-}
-
diff --git a/src/add-ons/kernel/bus_managers/ata/devices.c b/src/add-ons/kernel/bus_managers/ata/devices.c
index 90d063e79e..405f3e1700 100644
--- a/src/add-ons/kernel/bus_managers/ata/devices.c
+++ b/src/add-ons/kernel/bus_managers/ata/devices.c
@@ -123,13 +123,23 @@ create_device(ide_bus_info *bus, bool is_device1)
 
 	device->qreqActive = NULL;
 	device->qreqFree = (ide_qrequest *)malloc(sizeof(ide_qrequest));
+
 	memset(device->qreqFree, 0, sizeof(ide_qrequest));
 	device->qreqFree->running = false;
 	device->qreqFree->device = device;
 	device->qreqFree->request = NULL;
 
-
 	device->total_sectors = 0;
+
+	// disable interrupts
+	bus->controller->write_device_control(bus->channel_cookie, ide_devctrl_bit3 | ide_devctrl_nien);
+
+	// make sure LBA bit is set, and initialize device selection flag
+	device->tf.chs.head = 0;
+	device->tf.chs.mode = ide_mode_lba;
+	device->tf.chs.device = is_device1;
+	bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf, ide_mask_device_head);
+
 	return device;
 
 err:
diff --git a/src/add-ons/kernel/bus_managers/ata/dma.c b/src/add-ons/kernel/bus_managers/ata/dma.c
index 862e7a7740..fe7370542c 100644
--- a/src/add-ons/kernel/bus_managers/ata/dma.c
+++ b/src/add-ons/kernel/bus_managers/ata/dma.c
@@ -60,6 +60,9 @@ configure_dma(ide_device_info *device)
 	device->DMA_enabled = device->DMA_supported = device->bus->can_DMA
 		&& get_device_dma_mode(device) != -1;
 
+	dprintf("XXX DISABLING DMA\n");
+	device->DMA_enabled = false;
+
 	return true;
 }
 
@@ -102,12 +105,14 @@ prepare_dma(ide_device_info *device, ide_qrequest *qrequest)
 void
 start_dma_wait(ide_device_info *device, ide_qrequest *qrequest)
 {
+#if 0
 	ide_bus_info *bus = device->bus;
 
 	bus->controller->start_dma(bus->channel_cookie);
 
 	start_waiting(bus, qrequest->request->timeout > 0 ? 
 		qrequest->request->timeout : IDE_STD_TIMEOUT, ide_state_async_waiting);
+#endif
 }
 
 
diff --git a/src/add-ons/kernel/bus_managers/ata/ide_internal.h b/src/add-ons/kernel/bus_managers/ata/ide_internal.h
index be2dbdf106..62a92127a5 100644
--- a/src/add-ons/kernel/bus_managers/ata/ide_internal.h
+++ b/src/add-ons/kernel/bus_managers/ata/ide_internal.h
@@ -169,12 +169,12 @@ typedef struct ide_qrequest {
 
 // state of ide bus
 typedef enum {
-	ide_state_idle,				// noone is using it, but overlapped 
-								// commands may be pending
-	ide_state_accessing,		// bus is in use
-	ide_state_async_waiting,	// waiting for IRQ, to be reported via irq_dpc
-	ide_state_sync_waiting,		// waiting for IRQ, to be reported via sync_wait_sem
-} ide_bus_state;
+	ata_state_idle,				// not is using it
+	ata_state_busy,				// got bus but no command issued yet
+	ata_state_pio,				// bus is executing a PIO command
+	ata_state_dma				// bus is executing a DMA command
+} ata_bus_state;
+
 
 struct ide_bus_info {
 	ide_qrequest *active_qrequest;
@@ -187,13 +187,12 @@ struct ide_bus_info {
 	spinlock lock;
 	cpu_status prev_irq_state;
 
-	ide_bus_state state;		// current state of bus
+	ata_bus_state state;		// current state of bus
 
 	benaphore status_report_ben; // to lock when you report XPT about bus state
 								// i.e. during requeue, resubmit or finished
 
 	bool disconnected;			// true, if controller is lost
-	int num_running_reqs;		// total number of running requests
 
 	scsi_bus scsi_cookie;		// cookie for scsi bus
 
@@ -201,9 +200,6 @@ struct ide_bus_info {
 	scsi_dpc_cookie irq_dpc;
 	ide_synced_pc *synced_pc_list;
 
-	sem_id sync_wait_sem;		// released when sync_wait finished
-	bool sync_wait_timeout;		// true, if timeout occured
-
 	ide_device_info *active_device;
 	ide_device_info *devices[2];
 	ide_device_info *first_device;
@@ -302,10 +298,16 @@ device_released_bus(ide_device_info *device)
 
 // ata.c
 
-//void ata_select_device(ide_device_info *device);
 void ata_select_device(ide_bus_info *bus, int device);
+void ata_select(ide_device_info *device);
 bool ata_is_device_present(ide_bus_info *bus, int device);
-
+status_t ata_wait(ide_bus_info *bus, uint8 set, uint8 not_set, bool check_err, bigtime_t timeout);
+status_t ata_wait_for_drq(ide_bus_info *bus);
+status_t ata_wait_for_drqdown(ide_bus_info *bus);
+status_t ata_wait_for_drdy(ide_bus_info *bus);
+status_t ata_reset_bus(ide_bus_info *bus, bool *_devicePresent0, uint32 *_sigDev0, bool *_devicePresent1, uint32 *_sigDev1);
+status_t ata_reset_device(ide_device_info *device, bool *_devicePresent);
+status_t ata_send_command(ide_device_info *device, ide_qrequest *qrequest, bool need_drdy, uint32 timeout, ata_bus_state new_state);
 
 bool check_rw_error(ide_device_info *device, ide_qrequest *qrequest);
 bool check_output(ide_device_info *device, bool drdy_required, int error_mask, bool is_write);
@@ -331,25 +333,7 @@ void atapi_exec_io(ide_device_info *device, ide_qrequest *qrequest);
 
 // basic_prot.c
 
-status_t ata_wait(ide_bus_info *bus, uint8 mask, uint8 not_mask, bool check_err, bigtime_t timeout);
-
-
-bool ide_wait(ide_device_info *device, int mask, int not_mask, bool check_err,
-	bigtime_t timeout);
-bool wait_for_drq(ide_device_info *device);
-bool wait_for_drqdown(ide_device_info *device);
-bool wait_for_drdy(ide_device_info *device);
-
 // timeout in seconds
-bool send_command(ide_device_info *device, ide_qrequest *qrequest,
-	bool need_drdy, uint32 timeout, ide_bus_state new_state);
-//bool reset_device(ide_device_info *device, ide_qrequest *ignore);
-//bool reset_bus(ide_device_info *device, ide_qrequest *ignore);
-	
-bool check_service_req(ide_device_info *device);
-
-status_t reset_bus(ide_bus_info *bus, bool *devicePresent0, uint32 *sigDev0, bool *devicePresent1, uint32 *sigDev1);
-
 
 // channel_mgr.c
 
diff --git a/src/add-ons/kernel/bus_managers/ata/ide_sim.c b/src/add-ons/kernel/bus_managers/ata/ide_sim.c
index 28f4f08f8f..b294e12a8c 100644
--- a/src/add-ons/kernel/bus_managers/ata/ide_sim.c
+++ b/src/add-ons/kernel/bus_managers/ata/ide_sim.c
@@ -110,16 +110,14 @@ sim_scsi_io(ide_bus_info *bus, scsi_ccb *request)
 	ACQUIRE_BEN(&bus->status_report_ben);
 	IDE_LOCK(bus);
 
-	if (bus->state != ide_state_idle)
+	if (bus->state != ata_state_idle)
 		goto err_bus_busy;
 
 	// bail out if device can't accept further requests
 	if (device->qreqFree == NULL)
 		goto err_device_busy;
 
-	bus->state = ide_state_accessing;
-
-	++bus->num_running_reqs;
+	bus->state = ata_state_busy;
 
 	IDE_UNLOCK(bus);
 	RELEASE_BEN(&bus->status_report_ben);
@@ -239,7 +237,7 @@ scan_bus(ide_bus_info *bus)
 			destroy_device(bus->devices[i]);
 	}
 
-	status = reset_bus(bus, &devicePresent[0], &deviceSignature[0], &devicePresent[1], &deviceSignature[1]);
+	status = ata_reset_bus(bus, &devicePresent[0], &deviceSignature[0], &devicePresent[1], &deviceSignature[1]);
 
 	for (i = 0; i < bus->max_devices; ++i) {
 		if (!devicePresent[i])
@@ -303,6 +301,7 @@ sim_reset_bus(ide_bus_info *bus)
 	if (bus->disconnected)
 		return SCSI_NO_HBA;
 
+
 	return SCSI_REQ_INVALID;
 }
 
@@ -382,8 +381,6 @@ finish_request(ide_qrequest *qrequest, bool resubmit)
 	device->qreqFree = device->qreqActive;
 	device->qreqActive = NULL;
 
-	--bus->num_running_reqs; // XXX borked!!!
-
 	// paranoia
 	bus->active_qrequest = NULL;
 
@@ -514,7 +511,6 @@ void
 finish_all_requests(ide_device_info *device, ide_qrequest *ignore,
 	int subsys_status, bool resubmit)
 {
-	int i;
 
 	if (device == NULL)
 		return;
@@ -558,7 +554,6 @@ ide_sim_init_bus(device_node_handle node, void *user_cookie, void **cookie)
 	memset(bus, 0, sizeof(*bus));
 	bus->node = node;
 	bus->lock = 0;
-	bus->num_running_reqs = 0;
 	bus->active_qrequest = NULL;
 	bus->disconnected = false;
 
@@ -581,7 +576,7 @@ ide_sim_init_bus(device_node_handle node, void *user_cookie, void **cookie)
 	init_synced_pc(&bus->disconnect_syncinfo, disconnect_worker);
 
 	bus->scsi_cookie = user_cookie;
-	bus->state = ide_state_idle;
+	bus->state = ata_state_idle;
 	bus->timer.bus = bus;
 	bus->synced_pc_list = NULL;
 
@@ -589,11 +584,6 @@ ide_sim_init_bus(device_node_handle node, void *user_cookie, void **cookie)
 		goto err1;
 
 	bus->active_device = NULL;
-	bus->sync_wait_sem = create_sem(0, "ide_sync_wait");
-	if (bus->sync_wait_sem < 0) {
-		status = bus->sync_wait_sem;
-		goto err2;
-	}
 
 	bus->devices[0] = bus->devices[1] = NULL;
 
@@ -642,13 +632,6 @@ ide_sim_init_bus(device_node_handle node, void *user_cookie, void **cookie)
 
 	*cookie = bus;
 
-/*
-	// make sure LBA bit is set
-	bus->controller->read_command_block_regs(bus->channel_cookie, &device->tf, ide_mask_device_head);
-	tf.chs.mode = ide_mode_lba;
-	bus->controller->write_command_block_regs(bus->channel_cookie, &device->tf, ide_mask_device_head);
-*/
-
 	// detect devices
 	scan_bus(bus);
 	return B_OK;
@@ -656,9 +639,6 @@ ide_sim_init_bus(device_node_handle node, void *user_cookie, void **cookie)
 err5:
 	DELETE_BEN(&bus->status_report_ben);
 err4:
-err3:
-	delete_sem(bus->sync_wait_sem);
-err2:	
 	scsi->free_dpc(bus->irq_dpc);
 err1:
 	uninit_synced_pc(&bus->disconnect_syncinfo);
@@ -684,7 +664,6 @@ ide_sim_uninit_bus(ide_bus_info *bus)
 	pnp->put_device_node(parent);
 
 	DELETE_BEN(&bus->status_report_ben);	
-	delete_sem(bus->sync_wait_sem);
 	scsi->free_dpc(bus->irq_dpc);
 	uninit_synced_pc(&bus->disconnect_syncinfo);
 //	fast_log->stop_log(bus->log);
diff --git a/src/add-ons/kernel/bus_managers/ata/queuing.c b/src/add-ons/kernel/bus_managers/ata/queuing.c
deleted file mode 100644
index eff41a256d..0000000000
--- a/src/add-ons/kernel/bus_managers/ata/queuing.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
-** Copyright 2002/03, Thomas Kurschel. All rights reserved.
-** Distributed under the terms of the OpenBeOS License.
-*/
-
-/*
-	Part of Open IDE bus manager
-
-	Command queuing functions
-*/
-
-#include "ide_internal.h"
-#include "ide_sim.h"
-#include "ide_cmds.h"
-
-#include <string.h>
-#include <malloc.h>
-
-
-// maximum number of errors until command queuing is disabled
-#define MAX_CQ_FAILURES 3
-
-
-
-
-/**	tell device to abort all queued requests
- *	(tells XPT to resubmit these requests)
- *	return: true - abort successful
- *	        false - abort failed (in this case, nothing can be done)
- */
-
-bool
-send_abort_queue(ide_device_info *device)
-{
-	int status;
-	ide_bus_info *bus = device->bus;
-
-	SHOW_FLOW0( 3, "" );
-
-	device->tf.write.command = IDE_CMD_NOP;
-	// = discard outstanding commands
-	device->tf.write.features = IDE_CMD_NOP_NOP;
-
-	device->tf_param_mask = ide_mask_features;
-
-	if (!send_command(device, NULL, true, 0, ide_state_accessing))
-		goto err;
-
-	if (!wait_for_drdy(device))
-		goto err;
-
-	// device must answer "command rejected" and discard outstanding commands
-	status = bus->controller->get_altstatus(bus->channel_cookie);
-
-	if ((status & ide_status_err) == 0)
-		goto err;
-
-	if (!bus->controller->read_command_block_regs(bus->channel_cookie,
-			&device->tf, ide_mask_error)) {
-		// don't bother trying bus_reset as controller disappeared
-		device->subsys_status = SCSI_HBA_ERR;
-		return false;
-	}
-
-	if ((device->tf.read.error & ide_error_abrt) == 0)
-		goto err;
-
-	finish_all_requests(device, NULL, 0, true);
-	return true;
-
-err:
-	// ouch! device didn't react - we have to reset it
-	//return reset_device(device, NULL);
-	return false;
-}
diff --git a/src/add-ons/kernel/bus_managers/ata/scsi2ata.c b/src/add-ons/kernel/bus_managers/ata/scsi2ata.c
index 5460d3a04e..9d7ad9b4c3 100644
--- a/src/add-ons/kernel/bus_managers/ata/scsi2ata.c
+++ b/src/add-ons/kernel/bus_managers/ata/scsi2ata.c
@@ -205,6 +205,7 @@ err:
 static bool
 ata_test_unit_ready(ide_device_info *device, ide_qrequest *qrequest)
 {
+#if 0
 	SHOW_FLOW0(3, "");
 
 	if (!device->infoblock.RMSN_supported
@@ -229,6 +230,7 @@ ata_test_unit_ready(ide_device_info *device, ide_qrequest *qrequest)
 		;
 	}
 
+#endif
 	return true;
 }
 
@@ -237,6 +239,7 @@ ata_test_unit_ready(ide_device_info *device, ide_qrequest *qrequest)
 static bool
 ata_flush_cache(ide_device_info *device, ide_qrequest *qrequest)
 {
+#if 0
 	// we should also ask for FLUSH CACHE support, but everyone denies it
 	// (looks like they cheat to gain some performance advantage, but
 	//  that's pretty useless: everyone does it...)
@@ -254,6 +257,8 @@ ata_flush_cache(ide_device_info *device, ide_qrequest *qrequest)
 	wait_for_sync(device->bus);
 
 	return check_output(device, true, ide_error_abrt, false);
+#endif
+	return false;
 }
 
 
@@ -263,6 +268,7 @@ ata_flush_cache(ide_device_info *device, ide_qrequest *qrequest)
 static bool
 ata_load_eject(ide_device_info *device, ide_qrequest *qrequest, bool load)
 {
+#if 0
 	if (load) {
 		// ATA doesn't support loading
 		set_sense(device, SCSIS_KEY_ILLEGAL_REQUEST, SCSIS_ASC_PARAM_NOT_SUPPORTED);
@@ -278,6 +284,8 @@ ata_load_eject(ide_device_info *device, ide_qrequest *qrequest, bool load)
 	wait_for_sync(device->bus);
 
 	return check_output(device, true, ide_error_abrt | ide_error_nm, false);
+#endif
+	return false;
 }
 
 
diff --git a/src/add-ons/kernel/bus_managers/ata/sync.c b/src/add-ons/kernel/bus_managers/ata/sync.c
index ad982be5ca..e99a55c2a3 100644
--- a/src/add-ons/kernel/bus_managers/ata/sync.c
+++ b/src/add-ons/kernel/bus_managers/ata/sync.c
@@ -30,6 +30,7 @@
 void
 ide_dpc(void *arg)
 {
+#if 0
 	ide_bus_info *bus = (ide_bus_info *)arg;
 	ide_qrequest *qrequest;
 	ide_device_info *device;
@@ -88,6 +89,7 @@ ide_dpc(void *arg)
 
 /*err:
 	xpt->cont_send( bus->xpt_cookie );*/
+#endif
 }
 
 
@@ -96,17 +98,10 @@ ide_dpc(void *arg)
 status_t
 ide_irq_handler(ide_bus_info *bus, uint8 status)
 {	
+	return B_UNHANDLED_INTERRUPT;
+/*
 	ide_device_info *device;
 
-	// we need to lock bus to have a solid bus state
-	// (side effect: we lock out the timeout handler and get
-	//  delayed if the IRQ happens at the same time as a command is
-	//  issued; in the latter case, we have no official way to determine
-	//  whether the command was issued before or afterwards; if it was
-	//  afterwards, the device must not be busy; if it was before,
-	//  the device is either busy because of the sent command, or it's
-	//  not busy as the command has already been finished, i.e. there
-	//  was a second IRQ which we've overlooked as we didn't acknowledge
 	//  the first IRQ)
 	IDE_LOCK(bus);
 
@@ -180,14 +175,17 @@ ide_irq_handler(ide_bus_info *bus, uint8 status)
 
 			return B_UNHANDLED_INTERRUPT;
 	}
+*/
 }
 
 
+
 /**	cancel IRQ timeout
  *	it doesn't matter whether there really was a timout running;
  *	on return, bus state is set to _accessing_
  */
 
+/*
 void
 cancel_irq_timeout(ide_bus_info *bus)
 {
@@ -201,9 +199,8 @@ cancel_irq_timeout(ide_bus_info *bus)
 }
 
 
-/** start waiting for IRQ with bus lock hold
- *	new_state must be either sync_wait or async_wait
- */
+// start waiting for IRQ with bus lock hold
+//	new_state must be either sync_wait or async_wait
 
 void
 start_waiting(ide_bus_info *bus, uint32 timeout, int new_state)
@@ -226,7 +223,7 @@ start_waiting(ide_bus_info *bus, uint32 timeout, int new_state)
 }
 
 
-/** start waiting for IRQ with bus lock not hold */
+// start waiting for IRQ with bus lock not hold
 
 void
 start_waiting_nolock(ide_bus_info *bus, uint32 timeout, int new_state)
@@ -236,7 +233,7 @@ start_waiting_nolock(ide_bus_info *bus, uint32 timeout, int new_state)
 }
 
 
-/** wait for sync IRQ */
+// wait for sync IRQ 
 
 void
 wait_for_sync(ide_bus_info *bus)
@@ -244,9 +241,9 @@ wait_for_sync(ide_bus_info *bus)
 	acquire_sem(bus->sync_wait_sem);
 	cancel_timer(&bus->timer.te);
 }
+*/
 
-
-/** timeout dpc handler */
+// timeout dpc handler
 
 static void
 ide_timeout_dpc(void *arg)
@@ -280,19 +277,16 @@ ide_timeout_dpc(void *arg)
 }
 
 
-/** timeout handler, called by system timer */
+// timeout handler, called by system timer
 
 status_t
 ide_timeout(timer *arg)
 {
 	ide_bus_info *bus = ((ide_bus_timer_info *)arg)->bus;
 
-	FAST_LOG0(bus->log, ev_ide_timeout);
-
-	TRACE(("ide_timeout(): %p\n", bus));
-
 	dprintf("ide: ide_timeout() bus %p\n", bus);
 
+/*
 	// we need to lock bus to have a solid bus state
 	// (side effect: we lock out the IRQ handler)	
 	IDE_LOCK(bus);
@@ -334,9 +328,12 @@ ide_timeout(timer *arg)
 			IDE_UNLOCK(bus);
 			return B_DO_NOT_RESCHEDULE;
 	}
+*/
+	return B_DO_NOT_RESCHEDULE;
 }
 
 
+
 void
 init_synced_pc(ide_synced_pc *pc, ide_synced_pc_func func)
 {
@@ -368,7 +365,7 @@ schedule_synced_pc(ide_bus_info *bus, ide_synced_pc *pc, void *arg)
 		// spc cannot be registered twice
 		TRACE(("already registered\n"));
 		return B_ERROR;
-	} else if( bus->state != ide_state_idle ) {
+	} else if( bus->state != ata_state_idle ) {
 		// bus isn't idle - spc must be added to pending list
 		TRACE(("adding to pending list\n"));
 
@@ -386,7 +383,7 @@ schedule_synced_pc(ide_bus_info *bus, ide_synced_pc *pc, void *arg)
 
 	TRACE(("exec immediately\n"));
 
-	bus->state = ide_state_accessing;
+	bus->state = ata_state_busy;
 	IDE_UNLOCK(bus);
 
 	TRACE(("go\n"));
@@ -454,7 +451,7 @@ access_finished(ide_bus_info *bus, ide_device_info *device)
 
 		// noone wants it, so execute pending synced_pc
 		if (bus->synced_pc_list == NULL) {
-			bus->state = ide_state_idle;
+			bus->state = ata_state_idle;
 			IDE_UNLOCK(bus);
 			return;
 		}