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| author | Martyn Welch <martyn.welch@gefanuc.com> | 2009-12-15 08:42:56 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-03 16:42:27 -0800 |
| commit | 12b2d5c0895a03e941e7c145d9d23a45908a857b (patch) | |
| tree | aa56caaf60f1d0dc955ce25ec32fdd29b6dd2b12 /drivers/staging/vme/bridges/vme_ca91cx42.c | |
| parent | 638f199db463a8f2b1535c45ab27d04bb1a55baf (diff) | |
| download | kernel_samsung_smdk4412-12b2d5c0895a03e941e7c145d9d23a45908a857b.zip kernel_samsung_smdk4412-12b2d5c0895a03e941e7c145d9d23a45908a857b.tar.gz kernel_samsung_smdk4412-12b2d5c0895a03e941e7c145d9d23a45908a857b.tar.bz2 | |
Staging: vme: Allow override of geographical address on ca91c142
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@gefanuc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/vme/bridges/vme_ca91cx42.c')
| -rw-r--r-- | 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"); |