Geographical addressing only works if the VME backplane supports it. There
are a large number of old backplanes which do not support geographical
addressing. These boards will generally report a slot ID of zero - which is
an invalid ID in the slot numbering scheme.
Allow the geographical address to be over-ridden on the ca91c142 so that a
slot ID can be provided manually in these circumstances.
Signed-off-by: Martyn Welch <martyn.welch@xxxxxxxxxxx>
---
drivers/staging/vme/bridges/vme_ca91cx42.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.c b/drivers/staging/vme/bridges/vme_ca91cx42.c
index 1cf3e91..5799b09 100644
--- a/drivers/staging/vme/bridges/vme_ca91cx42.c
+++ b/drivers/staging/vme/bridges/vme_ca91cx42.c
@@ -38,6 +38,9 @@ static int ca91cx42_probe(struct pci_dev *, const struct pci_device_id *);
static void ca91cx42_remove(struct pci_dev *);
static void __exit ca91cx42_exit(void);
+/* Module parameters */
+static int geoid;
+
struct vme_bridge *ca91cx42_bridge;
wait_queue_head_t dma_queue;
wait_queue_head_t iack_queue;
@@ -881,8 +884,12 @@ int ca91cx42_slot_get(void)
{
u32 slot = 0;
- slot = ioread32(ca91cx42_bridge->base + VCSR_BS);
- slot = ((slot & CA91CX42_VCSR_BS_SLOT_M) >> 27);
+ if (!geoid) {
+ slot = ioread32(ca91cx42_bridge->base + VCSR_BS);
+ slot = ((slot & CA91CX42_VCSR_BS_SLOT_M) >> 27);
+ } else
+ slot = geoid;
+
return (int)slot;
}
@@ -1299,6 +1306,9 @@ static void __exit ca91cx42_exit(void)
pci_unregister_driver(&ca91cx42_driver);
}
+MODULE_PARM_DESC(geoid, "Override geographical addressing");
+module_param(geoid, int, 0);
+
MODULE_DESCRIPTION("VME driver for the Tundra Universe II VME bridge");
MODULE_LICENSE("GPL");
--
Martyn Welch MEng MPhil MIET (Principal Software Engineer) T:+44(0)1327322748
GE Fanuc Intelligent Platforms Ltd, |Registered in England and Wales
Tove Valley Business Park, Towcester, |(3828642) at 100 Barbirolli Square,
Northants, NN12 6PF, UK T:+44(0)1327359444 |Manchester,M2 3AB VAT:GB 927559189
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