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bcma: scan for extra address space 

Some cores like the USB core have two address spaces. In the USB host
controller one address space is used for the OHCI and the other for the
EHCI controller interface. The USB controller is the only core I found
with two address spaces. This code is based on the AI scan function
ai_scan() in shared/aiutils.c in the Broadcom SDK.

CC: Rafał Miłecki <zajec5@gmail.com>
CC: linux-wireless@vger.kernel.org
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Hauke Mehrtens 2012-03-15 23:49:56 +01:00 committed by Greg Kroah-Hartman
parent af5810597a
commit e167d9fbb8
2 changed files with 19 additions and 1 deletions
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19
drivers/bcma/scan.c
View File

@ -297,6 +297,23 @@ static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
return -EILSEQ;
}
/* First Slave Address Descriptor should be port 0:
* the main register space for the core
*/
tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
if (tmp <= 0) {
/* Try again to see if it is a bridge */
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_BRIDGE, 0);
if (tmp <= 0) {
return -EILSEQ;
} else {
pr_info("Bridge found\n");
return -ENXIO;
}
}
core->addr = tmp;
/* get & parse slave ports */
for (i = 0; i < ports[1]; i++) {
for (j = 0; ; j++) {
@ -309,7 +326,7 @@ static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
break;
} else {
if (i == 0 && j == 0)
core->addr = tmp;
core->addr1 = tmp;
}
}
}

1
include/linux/bcma/bcma.h
View File

@ -139,6 +139,7 @@ struct bcma_device {
u8 core_unit;
u32 addr;
u32 addr1;
u32 wrap;
void __iomem *io_addr;