[SCSI] aic7xxx: expose the bus setting to sysfs

Read the transciever register and display in the host transport
properties.  I'm still not entirely sure what this does for multiple
transciever adapters (like some 160 ones) however, I suspect it
displays the transciever state of the switchable bus segment.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/aic7xxx/aic7xxx.h

@@ -231,6 +231,7 @@ typedef enum {
 	AHC_TARGETMODE	= 0x20000,	/* Has tested target mode support */
 	AHC_MULTIROLE	= 0x40000,	/* Space for two roles at a time */
 	AHC_REMOVABLE	= 0x80000,	/* Hot-Swap supported */
+	AHC_HVD		= 0x100000,	/* HVD rather than SE */
 	AHC_AIC7770_FE	= AHC_FENONE,
 	/*
 	 * The real 7850 does not support Ultra modes, but there are

drivers/scsi/aic7xxx/aic7xxx_osm.c

@@ -2537,6 +2537,22 @@ static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
 }
 #endif
 
+static void ahc_linux_get_signalling(struct Scsi_Host *shost)
+{
+	struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
+	u8 mode = ahc_inb(ahc, SBLKCTL);
+
+	if (mode & ENAB40)
+		spi_signalling(shost) = SPI_SIGNAL_LVD;
+	else if (mode & ENAB20)
+		spi_signalling(shost) = 
+			ahc->features & AHC_HVD ?
+			SPI_SIGNAL_HVD :
+			SPI_SIGNAL_SE;
+	else
+		spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
+}
+
 static struct spi_function_template ahc_linux_transport_functions = {
 	.set_offset	= ahc_linux_set_offset,
 	.show_offset	= 1,
@@ -2552,6 +2568,7 @@ static struct spi_function_template ahc_linux_transport_functions = {
 	.set_qas	= ahc_linux_set_qas,
 	.show_qas	= 1,
 #endif
+	.get_signalling	= ahc_linux_get_signalling,
 };
 
 

drivers/scsi/aic7xxx/aic7xxx_pci.c

@@ -144,16 +144,22 @@ static ahc_device_setup_t ahc_aic785X_setup;
 static ahc_device_setup_t ahc_aic7860_setup;
 static ahc_device_setup_t ahc_apa1480_setup;
 static ahc_device_setup_t ahc_aic7870_setup;
+static ahc_device_setup_t ahc_aic7870h_setup;
 static ahc_device_setup_t ahc_aha394X_setup;
+static ahc_device_setup_t ahc_aha394Xh_setup;
 static ahc_device_setup_t ahc_aha494X_setup;
+static ahc_device_setup_t ahc_aha494Xh_setup;
 static ahc_device_setup_t ahc_aha398X_setup;
 static ahc_device_setup_t ahc_aic7880_setup;
+static ahc_device_setup_t ahc_aic7880h_setup;
 static ahc_device_setup_t ahc_aha2940Pro_setup;
 static ahc_device_setup_t ahc_aha394XU_setup;
+static ahc_device_setup_t ahc_aha394XUh_setup;
 static ahc_device_setup_t ahc_aha398XU_setup;
 static ahc_device_setup_t ahc_aic7890_setup;
 static ahc_device_setup_t ahc_aic7892_setup;
 static ahc_device_setup_t ahc_aic7895_setup;
+static ahc_device_setup_t ahc_aic7895h_setup;
 static ahc_device_setup_t ahc_aic7896_setup;
 static ahc_device_setup_t ahc_aic7899_setup;
 static ahc_device_setup_t ahc_aha29160C_setup;
@@ -225,19 +231,19 @@ struct ahc_pci_identity ahc_pci_ident_table [] =
 		ID_AHA_2944,
 		ID_ALL_MASK,
 		"Adaptec 2944 SCSI adapter",
-		ahc_aic7870_setup
+		ahc_aic7870h_setup
 	},
 	{
 		ID_AHA_3944,
 		ID_ALL_MASK,
 		"Adaptec 3944 SCSI adapter",
-		ahc_aha394X_setup
+		ahc_aha394Xh_setup
 	},
 	{
 		ID_AHA_4944,
 		ID_ALL_MASK,
 		"Adaptec 4944 SCSI adapter",
-		ahc_aha494X_setup
+		ahc_aha494Xh_setup
 	},
 	/* aic7880 based controllers */
 	{
@@ -256,13 +262,13 @@ struct ahc_pci_identity ahc_pci_ident_table [] =
 		ID_AHA_2944U & ID_DEV_VENDOR_MASK,
 		ID_DEV_VENDOR_MASK,
 		"Adaptec 2944 Ultra SCSI adapter",
-		ahc_aic7880_setup
+		ahc_aic7880h_setup
 	},
 	{
 		ID_AHA_3944U & ID_DEV_VENDOR_MASK,
 		ID_DEV_VENDOR_MASK,
 		"Adaptec 3944 Ultra SCSI adapter",
-		ahc_aha394XU_setup
+		ahc_aha394XUh_setup
 	},
 	{
 		ID_AHA_398XU & ID_DEV_VENDOR_MASK,
@@ -278,7 +284,7 @@ struct ahc_pci_identity ahc_pci_ident_table [] =
 		ID_AHA_4944U & ID_DEV_VENDOR_MASK,
 		ID_DEV_VENDOR_MASK,
 		"Adaptec 4944 Ultra SCSI adapter",
-		ahc_aic7880_setup
+		ahc_aic7880h_setup
 	},
 	{
 		ID_AHA_2930U & ID_DEV_VENDOR_MASK,
@@ -414,7 +420,7 @@ struct ahc_pci_identity ahc_pci_ident_table [] =
 		ID_AHA_3944AU,
 		ID_ALL_MASK,
 		"Adaptec 3944A Ultra SCSI adapter",
-		ahc_aic7895_setup
+		ahc_aic7895h_setup
 	},
 	{
 		ID_AIC7895_ARO,
@@ -2120,6 +2126,16 @@ ahc_aic7870_setup(struct ahc_softc *ahc)
 	return (0);
 }
 
+static int
+ahc_aic7870h_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aic7870_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
 static int
 ahc_aha394X_setup(struct ahc_softc *ahc)
 {
@@ -2131,6 +2147,16 @@ ahc_aha394X_setup(struct ahc_softc *ahc)
 	return (error);
 }
 
+static int
+ahc_aha394Xh_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aha394X_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
 static int
 ahc_aha398X_setup(struct ahc_softc *ahc)
 {
@@ -2153,6 +2179,16 @@ ahc_aha494X_setup(struct ahc_softc *ahc)
 	return (error);
 }
 
+static int
+ahc_aha494Xh_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aha494X_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
 static int
 ahc_aic7880_setup(struct ahc_softc *ahc)
 {
@@ -2174,6 +2210,17 @@ ahc_aic7880_setup(struct ahc_softc *ahc)
 	return (0);
 }
 
+static int
+ahc_aic7880h_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aic7880_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
+
 static int
 ahc_aha2940Pro_setup(struct ahc_softc *ahc)
 {
@@ -2193,6 +2240,16 @@ ahc_aha394XU_setup(struct ahc_softc *ahc)
 	return (error);
 }
 
+static int
+ahc_aha394XUh_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aha394XU_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
 static int
 ahc_aha398XU_setup(struct ahc_softc *ahc)
 {
@@ -2291,6 +2348,16 @@ ahc_aic7895_setup(struct ahc_softc *ahc)
 	return (0);
 }
 
+static int
+ahc_aic7895h_setup(struct ahc_softc *ahc)
+{
+	int error = ahc_aic7895_setup(ahc);
+
+	ahc->features |= AHC_HVD;
+
+	return error;
+}
+
 static int
 ahc_aic7896_setup(struct ahc_softc *ahc)
 {