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572ea68070
Import pending patches adding support for MT7988 and provide builds for the reference board for all possible boot media. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
139 lines
4.1 KiB
Diff
139 lines
4.1 KiB
Diff
From a0405999ebecf21ed9f76f1dc9420682cd3feba0 Mon Sep 17 00:00:00 2001
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From: Weijie Gao <weijie.gao@mediatek.com>
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Date: Wed, 19 Jul 2023 17:16:54 +0800
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Subject: [PATCH 16/29] net: mediatek: connect switch to PSE only when starting
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eth is requested
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So far the switch is initialized in probe stage and is connected to PSE
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unconditionally. This will cause all packets being flooded to PSE and may
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cause PSE hang before entering linux.
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This patch changes the connection between switch and PSE:
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- Still initialize switch in probe stage, but disconnect it with PSE
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- Connect switch with PSE on eth start
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- Disconnect on eth stop
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Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
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---
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drivers/net/mtk_eth.c | 44 ++++++++++++++++++++++++++++++++++++++++---
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1 file changed, 41 insertions(+), 3 deletions(-)
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--- a/drivers/net/mtk_eth.c
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+++ b/drivers/net/mtk_eth.c
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@@ -123,8 +123,10 @@ struct mtk_eth_priv {
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enum mtk_switch sw;
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int (*switch_init)(struct mtk_eth_priv *priv);
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+ void (*switch_mac_control)(struct mtk_eth_priv *priv, bool enable);
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u32 mt753x_smi_addr;
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u32 mt753x_phy_base;
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+ u32 mt753x_pmcr;
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struct gpio_desc rst_gpio;
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int mcm;
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@@ -613,6 +615,16 @@ static int mt7530_pad_clk_setup(struct m
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return 0;
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}
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+static void mt7530_mac_control(struct mtk_eth_priv *priv, bool enable)
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+{
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+ u32 pmcr = FORCE_MODE;
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+
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+ if (enable)
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+ pmcr = priv->mt753x_pmcr;
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+
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+ mt753x_reg_write(priv, PMCR_REG(6), pmcr);
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+}
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+
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static int mt7530_setup(struct mtk_eth_priv *priv)
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{
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u16 phy_addr, phy_val;
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@@ -663,11 +675,14 @@ static int mt7530_setup(struct mtk_eth_p
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FORCE_DPX | FORCE_LINK;
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/* MT7530 Port6: Forced 1000M/FD, FC disabled */
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- mt753x_reg_write(priv, PMCR_REG(6), val);
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+ priv->mt753x_pmcr = val;
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/* MT7530 Port5: Forced link down */
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mt753x_reg_write(priv, PMCR_REG(5), FORCE_MODE);
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+ /* Keep MAC link down before starting eth */
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+ mt753x_reg_write(priv, PMCR_REG(6), FORCE_MODE);
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+
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/* MT7530 Port6: Set to RGMII */
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mt753x_reg_rmw(priv, MT7530_P6ECR, P6_INTF_MODE_M, P6_INTF_MODE_RGMII);
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@@ -823,6 +838,17 @@ static void mt7531_phy_setting(struct mt
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}
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}
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+static void mt7531_mac_control(struct mtk_eth_priv *priv, bool enable)
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+{
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+ u32 pmcr = FORCE_MODE_LNK;
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+
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+ if (enable)
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+ pmcr = priv->mt753x_pmcr;
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+
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+ mt753x_reg_write(priv, PMCR_REG(5), pmcr);
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+ mt753x_reg_write(priv, PMCR_REG(6), pmcr);
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+}
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+
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static int mt7531_setup(struct mtk_eth_priv *priv)
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{
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u16 phy_addr, phy_val;
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@@ -882,8 +908,11 @@ static int mt7531_setup(struct mtk_eth_p
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(SPEED_1000M << FORCE_SPD_S) | FORCE_DPX |
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FORCE_LINK;
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- mt753x_reg_write(priv, PMCR_REG(5), pmcr);
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- mt753x_reg_write(priv, PMCR_REG(6), pmcr);
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+ priv->mt753x_pmcr = pmcr;
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+
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+ /* Keep MAC link down before starting eth */
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+ mt753x_reg_write(priv, PMCR_REG(5), FORCE_MODE_LNK);
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+ mt753x_reg_write(priv, PMCR_REG(6), FORCE_MODE_LNK);
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/* Turn on PHYs */
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for (i = 0; i < MT753X_NUM_PHYS; i++) {
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@@ -1227,6 +1256,9 @@ static int mtk_eth_start(struct udevice
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mtk_eth_fifo_init(priv);
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+ if (priv->switch_mac_control)
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+ priv->switch_mac_control(priv, true);
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+
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/* Start PHY */
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if (priv->sw == SW_NONE) {
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ret = mtk_phy_start(priv);
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@@ -1245,6 +1277,9 @@ static void mtk_eth_stop(struct udevice
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{
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struct mtk_eth_priv *priv = dev_get_priv(dev);
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+ if (priv->switch_mac_control)
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+ priv->switch_mac_control(priv, false);
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+
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mtk_pdma_rmw(priv, PDMA_GLO_CFG_REG,
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TX_WB_DDONE | RX_DMA_EN | TX_DMA_EN, 0);
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udelay(500);
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@@ -1484,16 +1519,19 @@ static int mtk_eth_of_to_plat(struct ude
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/* check for switch first, otherwise phy will be used */
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priv->sw = SW_NONE;
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priv->switch_init = NULL;
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+ priv->switch_mac_control = NULL;
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str = dev_read_string(dev, "mediatek,switch");
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if (str) {
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if (!strcmp(str, "mt7530")) {
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priv->sw = SW_MT7530;
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priv->switch_init = mt7530_setup;
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+ priv->switch_mac_control = mt7530_mac_control;
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priv->mt753x_smi_addr = MT753X_DFL_SMI_ADDR;
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} else if (!strcmp(str, "mt7531")) {
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priv->sw = SW_MT7531;
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priv->switch_init = mt7531_setup;
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+ priv->switch_mac_control = mt7531_mac_control;
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priv->mt753x_smi_addr = MT753X_DFL_SMI_ADDR;
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} else {
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printf("error: unsupported switch\n");
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