1 files changed, 66 insertions, 102 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index d279666dcb3..21b0ed583b8 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -62,7 +62,9 @@
 #include "libata.h"
 
 static unsigned int ata_dev_init_params(struct ata_port *ap,
-					struct ata_device *dev);
+					struct ata_device *dev,
+					u16 heads,
+					u16 sectors);
 static void ata_set_mode(struct ata_port *ap);
 static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
 					 struct ata_device *dev);
@@ -1081,9 +1083,8 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev)
  *
  *	Read ID data from the specified device.  ATA_CMD_ID_ATA is
  *	performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
- *	devices.  This function also takes care of EDD signature
- *	misreporting (to be removed once EDD support is gone) and
- *	issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives.
+ *	devices.  This function also issues ATA_CMD_INIT_DEV_PARAMS
+ *	for pre-ATA4 drives.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep)
@@ -1095,7 +1096,6 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
 			   unsigned int *p_class, int post_reset, u16 **p_id)
 {
 	unsigned int class = *p_class;
-	unsigned int using_edd;
 	struct ata_taskfile tf;
 	unsigned int err_mask = 0;
 	u16 *id;
@@ -1104,12 +1104,6 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
 
 	DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
 
-	if (ap->ops->probe_reset ||
-	    ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET))
-		using_edd = 0;
-	else
-		using_edd = 1;
-
 	ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
 
 	id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
@@ -1139,39 +1133,16 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
 
 	err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
 				     id, sizeof(id[0]) * ATA_ID_WORDS);
-
 	if (err_mask) {
 		rc = -EIO;
 		reason = "I/O error";
-
-		if (err_mask & ~AC_ERR_DEV)
-			goto err_out;
-
-		/*
-		 * arg!  EDD works for all test cases, but seems to return
-		 * the ATA signature for some ATAPI devices.  Until the
-		 * reason for this is found and fixed, we fix up the mess
-		 * here.  If IDENTIFY DEVICE returns command aborted
-		 * (as ATAPI devices do), then we issue an
-		 * IDENTIFY PACKET DEVICE.
-		 *
-		 * ATA software reset (SRST, the default) does not appear
-		 * to have this problem.
-		 */
-		if ((using_edd) && (class == ATA_DEV_ATA)) {
-			u8 err = tf.feature;
-			if (err & ATA_ABORTED) {
-				class = ATA_DEV_ATAPI;
-				goto retry;
-			}
-		}
 		goto err_out;
 	}
 
 	swap_buf_le16(id, ATA_ID_WORDS);
 
 	/* sanity check */
-	if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) {
+	if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
 		rc = -EINVAL;
 		reason = "device reports illegal type";
 		goto err_out;
@@ -1187,7 +1158,7 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
 		 * Some drives were very specific about that exact sequence.
 		 */
 		if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
-			err_mask = ata_dev_init_params(ap, dev);
+			err_mask = ata_dev_init_params(ap, dev, id[3], id[6]);
 			if (err_mask) {
 				rc = -EIO;
 				reason = "INIT_DEV_PARAMS failed";
@@ -1440,7 +1411,11 @@ static int ata_bus_probe(struct ata_port *ap)
 	if (!found)
 		goto err_out_disable;
 
-	ata_set_mode(ap);
+	if (ap->ops->set_mode)
+		ap->ops->set_mode(ap);
+	else
+		ata_set_mode(ap);
+
 	if (ap->flags & ATA_FLAG_PORT_DISABLED)
 		goto err_out_disable;
 
@@ -1845,7 +1820,7 @@ static void ata_host_set_dma(struct ata_port *ap)
  */
 static void ata_set_mode(struct ata_port *ap)
 {
-	int i, rc;
+	int i, rc, used_dma = 0;
 
 	/* step 1: calculate xfer_mask */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
@@ -1863,6 +1838,9 @@ static void ata_set_mode(struct ata_port *ap)
 		dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
 		dev->pio_mode = ata_xfer_mask2mode(pio_mask);
 		dev->dma_mode = ata_xfer_mask2mode(dma_mask);
+
+		if (dev->dma_mode)
+			used_dma = 1;
 	}
 
 	/* step 2: always set host PIO timings */
@@ -1884,6 +1862,17 @@ static void ata_set_mode(struct ata_port *ap)
 			goto err_out;
 	}
 
+	/*
+	 *	Record simplex status. If we selected DMA then the other
+	 *	host channels are not permitted to do so.
+	 */
+
+	if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
+		ap->host_set->simplex_claimed = 1;
+
+	/*
+	 *	Chip specific finalisation
+	 */
 	if (ap->ops->post_set_mode)
 		ap->ops->post_set_mode(ap);
 
@@ -2005,45 +1994,6 @@ static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
 		ap->ops->dev_select(ap, 0);
 }
 
-/**
- *	ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
- *	@ap: Port to reset and probe
- *
- *	Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
- *	probe the bus.  Not often used these days.
- *
- *	LOCKING:
- *	PCI/etc. bus probe sem.
- *	Obtains host_set lock.
- *
- */
-
-static unsigned int ata_bus_edd(struct ata_port *ap)
-{
-	struct ata_taskfile tf;
-	unsigned long flags;
-
-	/* set up execute-device-diag (bus reset) taskfile */
-	/* also, take interrupts to a known state (disabled) */
-	DPRINTK("execute-device-diag\n");
-	ata_tf_init(ap, &tf, 0);
-	tf.ctl |= ATA_NIEN;
-	tf.command = ATA_CMD_EDD;
-	tf.protocol = ATA_PROT_NODATA;
-
-	/* do bus reset */
-	spin_lock_irqsave(&ap->host_set->lock, flags);
-	ata_tf_to_host(ap, &tf);
-	spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
-	/* spec says at least 2ms.  but who knows with those
-	 * crazy ATAPI devices...
-	 */
-	msleep(150);
-
-	return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
-}
-
 static unsigned int ata_bus_softreset(struct ata_port *ap,
 				      unsigned int devmask)
 {
@@ -2078,13 +2028,12 @@ static unsigned int ata_bus_softreset(struct ata_port *ap,
 	 */
 	msleep(150);
 
-
 	/* Before we perform post reset processing we want to see if
-	   the bus shows 0xFF because the odd clown forgets the D7 pulldown
-	   resistor */
-
+	 * the bus shows 0xFF because the odd clown forgets the D7
+	 * pulldown resistor.
+	 */
 	if (ata_check_status(ap) == 0xFF)
-		return 1;	/* Positive is failure for some reason */
+		return AC_ERR_OTHER;
 
 	ata_bus_post_reset(ap, devmask);
 
@@ -2116,7 +2065,7 @@ void ata_bus_reset(struct ata_port *ap)
 	struct ata_ioports *ioaddr = &ap->ioaddr;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	u8 err;
-	unsigned int dev0, dev1 = 0, rc = 0, devmask = 0;
+	unsigned int dev0, dev1 = 0, devmask = 0;
 
 	DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
 
@@ -2139,18 +2088,8 @@ void ata_bus_reset(struct ata_port *ap)
 
 	/* issue bus reset */
 	if (ap->flags & ATA_FLAG_SRST)
-		rc = ata_bus_softreset(ap, devmask);
-	else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) {
-		/* set up device control */
-		if (ap->flags & ATA_FLAG_MMIO)
-			writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
-		else
-			outb(ap->ctl, ioaddr->ctl_addr);
-		rc = ata_bus_edd(ap);
-	}
-
-	if (rc)
-		goto err_out;
+		if (ata_bus_softreset(ap, devmask))
+			goto err_out;
 
 	/*
 	 * determine by signature whether we have ATA or ATAPI devices
@@ -2223,9 +2162,9 @@ static int sata_phy_resume(struct ata_port *ap)
  *	so makes reset sequence different from the original
  *	->phy_reset implementation and Jeff nervous.  :-P
  */
-extern void ata_std_probeinit(struct ata_port *ap)
+void ata_std_probeinit(struct ata_port *ap)
 {
-	if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) {
+	if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) {
 		sata_phy_resume(ap);
 		if (sata_dev_present(ap))
 			ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
@@ -2714,18 +2653,23 @@ static int ata_dma_blacklisted(const struct ata_device *dev)
  *	known limits including host controller limits, device
  *	blacklist, etc...
  *
+ *	FIXME: The current implementation limits all transfer modes to
+ *	the fastest of the lowested device on the port.  This is not
+ *	required on most controllers.
+ *
  *	LOCKING:
  *	None.
  */
 static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
 {
+	struct ata_host_set *hs = ap->host_set;
 	unsigned long xfer_mask;
 	int i;
 
 	xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
 				      ap->udma_mask);
 
-	/* use port-wide xfermask for now */
+	/* FIXME: Use port-wide xfermask for now */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct ata_device *d = &ap->device[i];
 		if (!ata_dev_present(d))
@@ -2735,12 +2679,23 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
 		xfer_mask &= ata_id_xfermask(d->id);
 		if (ata_dma_blacklisted(d))
 			xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+		/* Apply cable rule here. Don't apply it early because when
+		   we handle hot plug the cable type can itself change */
+		if (ap->cbl == ATA_CBL_PATA40)
+			xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
 	}
 
 	if (ata_dma_blacklisted(dev))
 		printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
 		       "disabling DMA\n", ap->id, dev->devno);
 
+	if (hs->flags & ATA_HOST_SIMPLEX) {
+		if (hs->simplex_claimed)
+			xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+	}
+	if (ap->ops->mode_filter)
+		xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
+
 	ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
 			    &dev->udma_mask);
 }
@@ -2795,16 +2750,16 @@ static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
  */
 
 static unsigned int ata_dev_init_params(struct ata_port *ap,
-					struct ata_device *dev)
+					struct ata_device *dev,
+					u16 heads,
+					u16 sectors)
 {
 	struct ata_taskfile tf;
 	unsigned int err_mask;
-	u16 sectors = dev->id[6];
-	u16 heads   = dev->id[3];
 
 	/* Number of sectors per track 1-255. Number of heads 1-16 */
 	if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
-		return 0;
+		return AC_ERR_INVALID;
 
 	/* set up init dev params taskfile */
 	DPRINTK("init dev params \n");
@@ -4536,6 +4491,14 @@ static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
 	int rc;
 
 	DPRINTK("ENTER\n");
+
+	if (!ent->port_ops->probe_reset &&
+	    !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
+		printk(KERN_ERR "ata%u: no reset mechanism available\n",
+		       port_no);
+		return NULL;
+	}
+
 	host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
 	if (!host)
 		return NULL;
@@ -4596,6 +4559,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
 	host_set->mmio_base = ent->mmio_base;
 	host_set->private_data = ent->private_data;
 	host_set->ops = ent->port_ops;
+	host_set->flags = ent->host_set_flags;
 
 	/* register each port bound to this device */
 	for (i = 0; i < ent->n_ports; i++) {