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kernel: fix bgmac support for BCM5358

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Fix two long-standing regressions.

Fixes: https://github.com/openwrt/openwrt/issues/8278
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 5e48c534f7c6b3a861f4a2dbb81d7bfcd9606f61)
This commit is contained in:
Rafał Miłecki 2023-02-27 09:46:14 +00:00
parent 1d206bcd71
commit 64261da739
2 changed files with 82 additions and 6 deletions
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76
target/linux/generic/backport-5.4/711-v6.3-bgmac-fix-initial-chip-reset-to-support-BCM5358.patch Normal file
View File

@ -0,0 +1,76 @@
From 327dabbd0111910a7d174b0b812d608d6b67bead Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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 <jdmason@kudzu.us>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
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;

12
target/linux/generic/hack-5.4/773-bgmac-add-srab-switch.patch
View File

@ -14,7 +14,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
--- 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 <hauke@hauke-m.de>
/**************************************************
* 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 <hauke@hauke-m.de>
+ 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 <hauke@hauke-m.de>
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);