From e167d9fbb881c030f93563fd364c8a0b8c5cd6d3 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Thu, 15 Mar 2012 23:49:56 +0100 Subject: [PATCH] bcma: scan for extra address space MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 CC: linux-wireless@vger.kernel.org Signed-off-by: Hauke Mehrtens Signed-off-by: Greg Kroah-Hartman --- drivers/bcma/scan.c | 19 ++++++++++++++++++- include/linux/bcma/bcma.h | 1 + 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/bcma/scan.c b/drivers/bcma/scan.c index f94cccccfa56..3bea7fe25b20 100644 --- a/drivers/bcma/scan.c +++ b/drivers/bcma/scan.c @@ -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; } } } diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h index 5af9a075498f..98bb2901d7b7 100644 --- 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; -- 2.20.1