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Staging: vme: Allow override of geographical address on tsi148

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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 tsi148 so that a
slot ID can be provided manually in these circumstances.

Signed-off-by: Markus Kraemer <mkraemer@e18.physik.tu-muenchen.de>
Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Martyn Welch 2009-12-15 08:42:49 +00:00 committed by Greg Kroah-Hartman
parent 51616e2106
commit 638f199db4
1 changed files with 20 additions and 5 deletions
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17
drivers/staging/vme/bridges/vme_tsi148.c
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@ -63,6 +63,7 @@ int tsi148_slot_get(void);
/* Modue parameter */
int err_chk = 0;
static int geoid;
/* XXX These should all be in a per device structure */
struct vme_bridge *tsi148_bridge;
@ -2145,8 +2146,12 @@ int tsi148_slot_get(void)
{
u32 slot = 0;
if (!geoid) {
slot = ioread32be(tsi148_bridge->base + TSI148_LCSR_VSTAT);
slot = slot & TSI148_LCSR_VSTAT_GA_M;
} else
slot = geoid;
return (int)slot;
}
@ -2196,6 +2201,7 @@ static int tsi148_crcsr_init(struct pci_dev *pdev)
vstat = tsi148_slot_get();
if (cbar != vstat) {
cbar = vstat;
dev_info(&pdev->dev, "Setting CR/CSR offset\n");
iowrite32be(cbar<<3, tsi148_bridge->base + TSI148_CBAR);
}
@ -2458,8 +2464,13 @@ static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id)
data = ioread32be(tsi148_bridge->base + TSI148_LCSR_VSTAT);
dev_info(&pdev->dev, "Board is%s the VME system controller\n",
(data & TSI148_LCSR_VSTAT_SCONS)? "" : " not");
if (!geoid) {
dev_info(&pdev->dev, "VME geographical address is %d\n",
data & TSI148_LCSR_VSTAT_GA_M);
} else {
dev_info(&pdev->dev, "VME geographical address is set to %d\n",
geoid);
}
dev_info(&pdev->dev, "VME Write and flush and error check is %s\n",
err_chk ? "enabled" : "disabled");
@ -2608,7 +2619,8 @@ static void tsi148_remove(struct pci_dev *pdev)
/* resources are stored in link list */
list_for_each(pos, &(tsi148_bridge->master_resources)) {
master_image = list_entry(pos, struct vme_master_resource, list);
master_image = list_entry(pos, struct vme_master_resource,
list);
list_del(pos);
kfree(master_image);
}
@ -2634,6 +2646,9 @@ static void __exit tsi148_exit(void)
MODULE_PARM_DESC(err_chk, "Check for VME errors on reads and writes");
module_param(err_chk, bool, 0);
MODULE_PARM_DESC(geoid, "Override geographical addressing");
module_param(geoid, int, 0);
MODULE_DESCRIPTION("VME driver for the Tundra Tempe VME bridge");
MODULE_LICENSE("GPL");