From f99e6d7c4ed3be2531bd576425a5bd07fb133bd7 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Mon, 27 Feb 2023 10:11:56 +0100 Subject: [PATCH] bgmac: fix *initial* chip reset to support BCM5358 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While bringing hardware up we should perform a full reset including the switch bit (BGMAC_BCMA_IOCTL_SW_RESET aka SICF_SWRST). It's what specification says and what reference driver does. This seems to be critical for the BCM5358. Without this hardware doesn't get initialized properly and doesn't seem to transmit or receive any packets. Originally bgmac was calling bgmac_chip_reset() before setting "has_robosw" property which resulted in expected behaviour. That has changed as a side effect of adding platform device support which regressed BCM5358 support. Fixes: f6a95a24957a ("net: ethernet: bgmac: Add platform device support") Cc: Jon Mason Signed-off-by: Rafał Miłecki Reviewed-by: Leon Romanovsky Reviewed-by: Florian Fainelli Link: https://lore.kernel.org/r/20230227091156.19509-1-zajec5@gmail.com Signed-off-by: Paolo Abeni --- drivers/net/ethernet/broadcom/bgmac.c | 8 ++++++-- drivers/net/ethernet/broadcom/bgmac.h | 2 ++ 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index 3038386a5afd8..1761df8fb7f96 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -890,13 +890,13 @@ static void bgmac_chip_reset_idm_config(struct bgmac *bgmac) if (iost & BGMAC_BCMA_IOST_ATTACHED) { flags = BGMAC_BCMA_IOCTL_SW_CLKEN; - if (!bgmac->has_robosw) + if (bgmac->in_init || !bgmac->has_robosw) flags |= BGMAC_BCMA_IOCTL_SW_RESET; } bgmac_clk_enable(bgmac, flags); } - if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw) + if (iost & BGMAC_BCMA_IOST_ATTACHED && (bgmac->in_init || !bgmac->has_robosw)) bgmac_idm_write(bgmac, BCMA_IOCTL, bgmac_idm_read(bgmac, BCMA_IOCTL) & ~BGMAC_BCMA_IOCTL_SW_RESET); @@ -1490,6 +1490,8 @@ int bgmac_enet_probe(struct bgmac *bgmac) struct net_device *net_dev = bgmac->net_dev; int err; + bgmac->in_init = true; + bgmac_chip_intrs_off(bgmac); net_dev->irq = bgmac->irq; @@ -1542,6 +1544,8 @@ int bgmac_enet_probe(struct bgmac *bgmac) /* Omit FCS from max MTU size */ net_dev->max_mtu = BGMAC_RX_MAX_FRAME_SIZE - ETH_FCS_LEN; + bgmac->in_init = false; + err = register_netdev(bgmac->net_dev); if (err) { dev_err(bgmac->dev, "Cannot register net device\n"); diff --git a/drivers/net/ethernet/broadcom/bgmac.h b/drivers/net/ethernet/broadcom/bgmac.h index e05ac92c06504..d73ef262991d6 100644 --- a/drivers/net/ethernet/broadcom/bgmac.h +++ b/drivers/net/ethernet/broadcom/bgmac.h @@ -472,6 +472,8 @@ struct bgmac { int irq; u32 int_mask; + bool in_init; + /* Current MAC state */ int mac_speed; int mac_duplex; -- 2.30.2