libata: Add a host flag to indicate lack of IORDY capability

This is the first preparation to doing the !IORDY cases properly.  Further
diffs will then add the needed logic to do it right.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 13 insertions, 3 deletions

diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 4223e10de6a..98c1fee4b30 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -89,9 +89,10 @@ static int probe_all;			/* Set to check all ISA port ranges */
 static int ht6560a;			/* HT 6560A on primary 1, secondary 2, both 3 */
 static int ht6560b;			/* HT 6560A on primary 1, secondary 2, both 3 */
 static int opti82c611a;			/* Opti82c611A on primary 1, secondary 2, both 3 */
-static int opti82c46x;		/* Opti 82c465MV present (pri/sec autodetect) */
+static int opti82c46x;			/* Opti 82c465MV present (pri/sec autodetect) */
 static int autospeed;			/* Chip present which snoops speed changes */
 static int pio_mask = 0x1F;		/* PIO range for autospeed devices */
+static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
 
 /**
  *	legacy_set_mode		-	mode setting
@@ -113,6 +114,7 @@ static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct ata_device *dev = &ap->device[i];
 		if (ata_dev_enabled(dev)) {
+			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
 			dev->pio_mode = XFER_PIO_0;
 			dev->xfer_mode = XFER_PIO_0;
 			dev->xfer_shift = ATA_SHIFT_PIO;
@@ -695,6 +697,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 	void __iomem *io_addr, *ctrl_addr;
 	int pio_modes = pio_mask;
 	u32 mask = (1 << port);
+	u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
 	int ret;
 
 	pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
@@ -715,6 +718,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 	if (ht6560a & mask) {
 		ops = &ht6560a_port_ops;
 		pio_modes = 0x07;
+		iordy = ATA_FLAG_NO_IORDY;
 	}
 	if (ht6560b & mask) {
 		ops = &ht6560b_port_ops;
@@ -750,6 +754,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 			printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
 				pio_modes = 0x07;
 			ops = &pdc20230_port_ops;
+			iordy = ATA_FLAG_NO_IORDY;
 			udelay(100);
 			inb(0x1F5);
 		} else {
@@ -767,6 +772,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 	/* Chip does mode setting by command snooping */
 	if (ops == &legacy_port_ops && (autospeed & mask))
 		ops = &simple_port_ops;
+
 	memset(&ae, 0, sizeof(struct ata_probe_ent));
 	INIT_LIST_HEAD(&ae.node);
 	ae.dev = &pdev->dev;
@@ -776,7 +782,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 	ae.pio_mask = pio_modes;
 	ae.irq = irq;
 	ae.irq_flags = 0;
-	ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST;
+	ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST|iordy;
 	ae.port[0].cmd_addr = io_addr;
 	ae.port[0].altstatus_addr = ctrl_addr;
 	ae.port[0].ctl_addr = ctrl_addr;
@@ -945,6 +951,7 @@ module_param(ht6560b, int, 0);
 module_param(opti82c611a, int, 0);
 module_param(opti82c46x, int, 0);
 module_param(pio_mask, int, 0);
+module_param(iordy_mask, int, 0);
 
 module_init(legacy_init);
 module_exit(legacy_exit);
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 1b3b4ed8eb1..4362141976a 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -264,16 +264,18 @@ static __init int qdi_init_one(unsigned long port, int type, unsigned long io, i
 	if (type == 6580) {
 		ae.port_ops = &qdi6580_port_ops;
 		ae.pio_mask = 0x1F;
+		ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
 	} else {
 		ae.port_ops = &qdi6500_port_ops;
 		ae.pio_mask = 0x07;	/* Actually PIO3 !IORDY is possible */
+		ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
+				ATA_FLAG_NO_IORDY;
 	}
 
 	ae.sht = &qdi_sht;
 	ae.n_ports = 1;
 	ae.irq = irq;
 	ae.irq_flags = 0;
-	ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
 	ae.port[0].cmd_addr = io_addr;
 	ae.port[0].altstatus_addr = ctl_addr;
 	ae.port[0].ctl_addr = ctl_addr;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 596e0c18887..b870b20df43 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -172,6 +172,7 @@ enum {
 	ATA_FLAG_DEBUGMSG	= (1 << 13),
 	ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
 	ATA_FLAG_IGN_SIMPLEX	= (1 << 15), /* ignore SIMPLEX */
+	ATA_FLAG_NO_IORDY	= (1 << 16), /* controller lacks iordy */
 
 	/* The following flag belongs to ap->pflags but is kept in
 	 * ap->flags because it's referenced in many LLDs and will be