openwrtv4/target/linux/brcm47xx/patches-3.2/183-bcma-scan-for-extra-address-space.patch

From adebff2358c2b631fc04e31ba87eee48e546c655 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 20 Nov 2011 18:22:35 +0100
Subject: [PATCH 183/186] 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 i the Broadcom SDK.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 drivers/bcma/scan.c       |   18 +++++++++++++++++-
 include/linux/bcma/bcma.h |    1 +
 2 files changed, 18 insertions(+), 1 deletions(-)

--- a/drivers/bcma/scan.c
+++ b/drivers/bcma/scan.c
@@ -297,6 +297,22 @@ static int bcma_get_next_core(struct bcm
 			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) {
+			pr_info("found bridge");
+			return -ENXIO;
+		}
+	}
+	core->addr = tmp;
+
 	/* get & parse slave ports */
 	for (i = 0; i < ports[1]; i++) {
 		for (j = 0; ; j++) {
@@ -309,7 +325,7 @@ static int bcma_get_next_core(struct bcm
 				break;
 			} else {
 				if (i == 0 && j == 0)
-					core->addr = tmp;
+					core->addr1 = tmp;
 			}
 		}
 	}
--- a/include/linux/bcma/bcma.h
+++ b/include/linux/bcma/bcma.h
@@ -139,6 +139,7 @@ struct bcma_device {
 	u8 core_unit;
 
 	u32 addr;
+	u32 addr1;
 	u32 wrap;
 
 	void __iomem *io_addr;