aic7xxx: add support for the SPI transport class

This is just a simplistic patch to export all of the
aic7xxx internal transport parameters via the SPI
transport class.  It doesn't actually alter the way the
driver works at all.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 261 insertions, 0 deletions

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index 35d6de5a4c9..6b6ee0a52a4 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -122,6 +122,10 @@
 #include "aic7xxx_osm.h"
 #include "aic7xxx_inline.h"
 #include <scsi/scsicam.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_spi.h>
+
+static struct scsi_transport_template *ahc_linux_transport_template = NULL;
 
 /*
  * Include aiclib.c as part of our
@@ -1728,6 +1732,8 @@ ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
 	ahc_linux_start_dv(ahc);
 	ahc_unlock(ahc, &s);
 
+	host->transportt = ahc_linux_transport_template;
+
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
 	scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
 	scsi_scan_host(host);
@@ -4990,13 +4996,267 @@ ahc_platform_dump_card_state(struct ahc_softc *ahc)
 
 static void ahc_linux_exit(void);
 
+static void ahc_linux_get_period(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_period(starget) = tinfo->curr.period;
+}
+
+static void ahc_linux_set_period(struct scsi_target *starget, int period)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahc_devinfo devinfo;
+	unsigned int ppr_options = tinfo->curr.ppr_options;
+	unsigned long flags;
+	unsigned long offset = tinfo->curr.offset;
+	struct ahc_syncrate *syncrate;
+
+	if (offset == 0)
+		offset = MAX_OFFSET;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+	ahc_lock(ahc, &flags);
+	ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
+			 ppr_options, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_get_offset(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_offset(starget) = tinfo->curr.offset;
+}
+
+static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahc_devinfo devinfo;
+	unsigned int ppr_options = 0;
+	unsigned int period = 0;
+	unsigned long flags;
+	struct ahc_syncrate *syncrate = NULL;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	if (offset != 0) {
+		syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
+		period = tinfo->curr.period;
+		ppr_options = tinfo->curr.ppr_options;
+	}
+	ahc_lock(ahc, &flags);
+	ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
+			 ppr_options, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_get_width(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_width(starget) = tinfo->curr.width;
+}
+
+static void ahc_linux_set_width(struct scsi_target *starget, int width)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_devinfo devinfo;
+	unsigned long flags;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	ahc_lock(ahc, &flags);
+	ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_get_dt(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
+}
+
+static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahc_devinfo devinfo;
+	unsigned int ppr_options = tinfo->curr.ppr_options
+		& ~MSG_EXT_PPR_DT_REQ;
+	unsigned int period = tinfo->curr.period;
+	unsigned long flags;
+	struct ahc_syncrate *syncrate;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
+				     dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+	ahc_lock(ahc, &flags);
+	ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
+			 ppr_options, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_get_qas(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
+}
+
+static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahc_devinfo devinfo;
+	unsigned int ppr_options = tinfo->curr.ppr_options
+		& ~MSG_EXT_PPR_QAS_REQ;
+	unsigned int period = tinfo->curr.period;
+	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+	unsigned long flags;
+	struct ahc_syncrate *syncrate;
+
+	if (qas)
+		ppr_options |= MSG_EXT_PPR_QAS_REQ;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
+				     dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+	ahc_lock(ahc, &flags);
+	ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
+			 ppr_options, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static void ahc_linux_get_iu(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
+}
+
+static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+	struct ahc_tmode_tstate *tstate;
+	struct ahc_initiator_tinfo *tinfo 
+		= ahc_fetch_transinfo(ahc,
+				      starget->channel + 'A',
+				      shost->this_id, starget->id, &tstate);
+	struct ahc_devinfo devinfo;
+	unsigned int ppr_options = tinfo->curr.ppr_options
+		& ~MSG_EXT_PPR_IU_REQ;
+	unsigned int period = tinfo->curr.period;
+	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+	unsigned long flags;
+	struct ahc_syncrate *syncrate;
+
+	if (iu)
+		ppr_options |= MSG_EXT_PPR_IU_REQ;
+
+	ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+			    starget->channel + 'A', ROLE_INITIATOR);
+	syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
+				     dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+	ahc_lock(ahc, &flags);
+	ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
+			 ppr_options, AHC_TRANS_GOAL, FALSE);
+	ahc_unlock(ahc, &flags);
+}
+
+static struct spi_function_template ahc_linux_transport_functions = {
+	.get_offset	= ahc_linux_get_offset,
+	.set_offset	= ahc_linux_set_offset,
+	.show_offset	= 1,
+	.get_period	= ahc_linux_get_period,
+	.set_period	= ahc_linux_set_period,
+	.show_period	= 1,
+	.get_width	= ahc_linux_get_width,
+	.set_width	= ahc_linux_set_width,
+	.show_width	= 1,
+	.get_dt		= ahc_linux_get_dt,
+	.set_dt		= ahc_linux_set_dt,
+	.show_dt	= 1,
+	.get_iu		= ahc_linux_get_iu,
+	.set_iu		= ahc_linux_set_iu,
+	.show_iu	= 1,
+	.get_qas	= ahc_linux_get_qas,
+	.set_qas	= ahc_linux_set_qas,
+	.show_qas	= 1,
+};
+
+
+
 static int __init
 ahc_linux_init(void)
 {
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+	ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
+	if (!ahc_linux_transport_template)
+		return -ENODEV;
 	int rc = ahc_linux_detect(&aic7xxx_driver_template);
 	if (rc)
 		return rc;
+	spi_release_transport(ahc_linux_transport_template);
 	ahc_linux_exit();
 	return -ENODEV;
 #else
@@ -5037,6 +5297,7 @@ ahc_linux_exit(void)
 #endif
 	ahc_linux_pci_exit();
 	ahc_linux_eisa_exit();
+	spi_release_transport(ahc_linux_transport_template);
 }
 
 module_init(ahc_linux_init);