From 622a521fa46b37d3a01f2b2d59df9299dbdba16f Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 5 Jan 2014 01:10:46 +0100 Subject: [PATCH] bgmac: reset all cores on Northstar SoC MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit On the Northstar SoC (BCM4707 and BCM53018) we have to enable all GMAC cores when we just want to use on. We iterate over all the cores and activate them. Signed-off-by: Hauke Mehrtens Acked-by: Rafał Miłecki Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bgmac.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index 88ec69e86d2f..2cdacb852e81 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -1446,6 +1446,27 @@ static int bgmac_probe(struct bcma_device *core) bgmac_chip_reset(bgmac); + /* For Northstar, we have to take all GMAC core out of reset */ + if (core->id.id == BCMA_CHIP_ID_BCM4707 || + core->id.id == BCMA_CHIP_ID_BCM53018) { + struct bcma_device *ns_core; + int ns_gmac; + + /* Northstar has 4 GMAC cores */ + for (ns_gmac = 0; ns_gmac < 4; ns_gmac++) { + /* As northstar requirement, we have to reset all GAMCs + * before accessing one. bgmac_chip_reset() call + * bcma_core_enable() for this core. Then the other + * three GAMCs didn't reset. We do it here. + */ + ns_core = bcma_find_core_unit(core->bus, + BCMA_CORE_MAC_GBIT, + ns_gmac); + if (ns_core && !bcma_core_is_enabled(ns_core)) + bcma_core_enable(ns_core, 0); + } + } + err = bgmac_dma_alloc(bgmac); if (err) { bgmac_err(bgmac, "Unable to alloc memory for DMA\n"); -- 2.20.1