[U-Boot] [PATCH v3 05/22] scsi: Add function and env var to report number of scsi drives

[Simon Glass]

From: Stefan Reinauer <reinauer at chromium.org>

Add a new function to find out the number of available SCSI disks. Also
set the 'scsidevs' environment variable after each scan.

Signed-off-by: Stefan Reinauer <reinauer at chromium.org>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v3:
- Fix setenv operation to use correct function

Changes in v2:
- Set 'scsidevs' environment variable to number of SCSI disks

 README            |    3 +++
 common/cmd_scsi.c |    8 ++++++++
 include/scsi.h    |    2 ++
 3 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/README b/README
index 69da2b8..801772c 100644
--- a/README
+++ b/README
@@ -1039,6 +1039,9 @@ The following options need to be configured:
 		devices.
 		CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz)
 
+                The environment variable 'scsidevs' is set to the number of
+                SCSI devices found during the last scan.
+
 - NETWORK Support (PCI):
 		CONFIG_E1000
 		Support for Intel 8254x/8257x gigabit chips.
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index 31ea788..9bd8ec9 100644
--- a/common/cmd_scsi.c
+++ b/common/cmd_scsi.c
@@ -184,6 +184,14 @@ removable:
 		scsi_curr_dev=0;
 	else
 		scsi_curr_dev = -1;
+
+	printf("Found %d device(s).\n", scsi_max_devs);
+	setenv_ulong("scsidevs", scsi_max_devs);
+}
+
+int scsi_get_disk_count(void)
+{
+	return scsi_max_devs;
 }
 
 #ifdef CONFIG_PCI
diff --git a/include/scsi.h b/include/scsi.h
index 89ae45f..9681d19 100644
--- a/include/scsi.h
+++ b/include/scsi.h
@@ -189,6 +189,8 @@ void scsi_low_level_init(int busdevfunc);
 void scsi_init(void);
 void scsi_scan(int mode);
 
+/** @return the number of scsi disks */
+int scsi_get_disk_count(void);
 
 #define SCSI_IDENTIFY					0xC0  /* not used */
 
-- 
1.7.7.3