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62 lines
1.7 KiB
Diff
62 lines
1.7 KiB
Diff
From adebff2358c2b631fc04e31ba87eee48e546c655 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 20 Nov 2011 18:22:35 +0100
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Subject: [PATCH 183/186] bcma: scan for extra address space
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Some cores like the USB core have two address spaces. In the USB host
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controller one address space is used for the OHCI and the other for the
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EHCI controller interface. The USB controller is the only core I found
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with two address spaces. This code is based on the AI scan function
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ai_scan() in shared/aiutils.c i the Broadcom SDK.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/bcma/scan.c | 18 +++++++++++++++++-
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include/linux/bcma/bcma.h | 1 +
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2 files changed, 18 insertions(+), 1 deletions(-)
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--- a/drivers/bcma/scan.c
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+++ b/drivers/bcma/scan.c
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@@ -297,6 +297,22 @@ static int bcma_get_next_core(struct bcm
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return -EILSEQ;
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}
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+
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+ /* First Slave Address Descriptor should be port 0:
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+ * the main register space for the core
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+ */
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+ tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
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+ if (tmp <= 0) {
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+ /* Try again to see if it is a bridge */
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+ tmp = bcma_erom_get_addr_desc(bus, eromptr,
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+ SCAN_ADDR_TYPE_BRIDGE, 0);
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+ if (tmp > 0) {
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+ pr_info("found bridge");
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+ return -ENXIO;
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+ }
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+ }
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+ core->addr = tmp;
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+
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/* get & parse slave ports */
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for (i = 0; i < ports[1]; i++) {
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for (j = 0; ; j++) {
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@@ -309,7 +325,7 @@ static int bcma_get_next_core(struct bcm
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break;
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} else {
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if (i == 0 && j == 0)
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- core->addr = tmp;
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+ core->addr1 = tmp;
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}
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}
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}
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--- a/include/linux/bcma/bcma.h
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+++ b/include/linux/bcma/bcma.h
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@@ -139,6 +139,7 @@ struct bcma_device {
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u8 core_unit;
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u32 addr;
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+ u32 addr1;
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u32 wrap;
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void __iomem *io_addr;
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