From 64261da7395eb096bce295cf400083b210e458f5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Mon, 27 Feb 2023 09:46:14 +0000 Subject: [PATCH] kernel: fix bgmac support for BCM5358 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Fix two long-standing regressions. Fixes: https://github.com/openwrt/openwrt/issues/8278 Signed-off-by: Rafał Miłecki (cherry picked from commit 5e48c534f7c6b3a861f4a2dbb81d7bfcd9606f61) --- ...nitial-chip-reset-to-support-BCM5358.patch | 76 +++++++++++++++++++ .../hack-5.4/773-bgmac-add-srab-switch.patch | 12 +-- 2 files changed, 82 insertions(+), 6 deletions(-) create mode 100644 target/linux/generic/backport-5.4/711-v6.3-bgmac-fix-initial-chip-reset-to-support-BCM5358.patch diff --git a/target/linux/generic/backport-5.4/711-v6.3-bgmac-fix-initial-chip-reset-to-support-BCM5358.patch b/target/linux/generic/backport-5.4/711-v6.3-bgmac-fix-initial-chip-reset-to-support-BCM5358.patch new file mode 100644 index 0000000000..54f077b544 --- /dev/null +++ b/target/linux/generic/backport-5.4/711-v6.3-bgmac-fix-initial-chip-reset-to-support-BCM5358.patch @@ -0,0 +1,76 @@ +From 327dabbd0111910a7d174b0b812d608d6b67bead Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 8 Aug 2022 23:05:25 +0200 +Subject: [PATCH] bgmac: fix *initial* chip reset to support BCM5358 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +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 +--- + drivers/net/ethernet/broadcom/bgmac.c | 8 ++++++-- + drivers/net/ethernet/broadcom/bgmac.h | 2 ++ + 2 files changed, 8 insertions(+), 2 deletions(-) + +--- 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( + + 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); +@@ -1489,6 +1489,8 @@ 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; +@@ -1538,6 +1540,8 @@ int bgmac_enet_probe(struct bgmac *bgmac + net_dev->hw_features = net_dev->features; + net_dev->vlan_features = net_dev->features; + ++ bgmac->in_init = false; ++ + err = register_netdev(bgmac->net_dev); + if (err) { + dev_err(bgmac->dev, "Cannot register net device\n"); +--- a/drivers/net/ethernet/broadcom/bgmac.h ++++ b/drivers/net/ethernet/broadcom/bgmac.h +@@ -511,6 +511,8 @@ struct bgmac { + int irq; + u32 int_mask; + ++ bool in_init; ++ + /* Current MAC state */ + int mac_speed; + int mac_duplex; diff --git a/target/linux/generic/hack-5.4/773-bgmac-add-srab-switch.patch b/target/linux/generic/hack-5.4/773-bgmac-add-srab-switch.patch index 89e0df4606..6398cd5893 100644 --- a/target/linux/generic/hack-5.4/773-bgmac-add-srab-switch.patch +++ b/target/linux/generic/hack-5.4/773-bgmac-add-srab-switch.patch @@ -14,7 +14,7 @@ Signed-off-by: Hauke Mehrtens --- a/drivers/net/ethernet/broadcom/bgmac-bcma.c +++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c -@@ -268,6 +268,7 @@ static int bgmac_probe(struct bcma_devic +@@ -280,6 +280,7 @@ static int bgmac_probe(struct bcma_devic bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; bgmac->feature_flags |= BGMAC_FEAT_NO_RESET; bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500; @@ -50,7 +50,7 @@ Signed-off-by: Hauke Mehrtens /************************************************** * MII **************************************************/ -@@ -1538,6 +1550,14 @@ int bgmac_enet_probe(struct bgmac *bgmac +@@ -1540,6 +1552,14 @@ int bgmac_enet_probe(struct bgmac *bgmac net_dev->hw_features = net_dev->features; net_dev->vlan_features = net_dev->features; @@ -62,10 +62,10 @@ Signed-off-by: Hauke Mehrtens + bgmac->b53_device = &bgmac_b53_dev; + } + + bgmac->in_init = false; + err = register_netdev(bgmac->net_dev); - if (err) { - dev_err(bgmac->dev, "Cannot register net device\n"); -@@ -1560,6 +1580,10 @@ EXPORT_SYMBOL_GPL(bgmac_enet_probe); +@@ -1564,6 +1584,10 @@ EXPORT_SYMBOL_GPL(bgmac_enet_probe); void bgmac_enet_remove(struct bgmac *bgmac) { @@ -86,7 +86,7 @@ Signed-off-by: Hauke Mehrtens struct bgmac_slot_info { union { -@@ -532,6 +533,9 @@ struct bgmac { +@@ -534,6 +535,9 @@ struct bgmac { void (*cmn_maskset32)(struct bgmac *bgmac, u16 offset, u32 mask, u32 set); int (*phy_connect)(struct bgmac *bgmac); -- 2.30.2