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Commit 622a521f authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by David S. Miller
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bgmac: reset all cores on Northstar SoC 



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: default avatarHauke Mehrtens <hauke@hauke-m.de>
Acked-by: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 48e07fbe

drivers/net/ethernet/broadcom/bgmac.c

+21 −0
Original line number Diff line number Diff line
@@ -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");