mediatek: add v4.19 support

Bump the target to v4.19. Add a patch with additional eth driver
fixes/features that MTK provided aswell as the driver for the new mt7530
switch.

Signed-off-by: John Crispin <john@phrozen.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/target/linux/mediatek/files-4.19/drivers/net/phy/mtk/mt753x/mt753x_common.c b/target/linux/mediatek/files-4.19/drivers/net/phy/mtk/mt753x/mt753x_common.c
new file mode 100644
index 0000000000..c836a63607
--- /dev/null
+++ b/target/linux/mediatek/files-4.19/drivers/net/phy/mtk/mt753x/mt753x_common.c
@@ -0,0 +1,94 @@
+/*
+ * Common part for MediaTek MT753x gigabit switch
+ *
+ * Copyright (C) 2018 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+
+#include "mt753x.h"
+#include "mt753x_regs.h"
+
+void mt753x_irq_enable(struct gsw_mt753x *gsw)
+{
+	u32 val;
+	int i;
+
+	/* Record initial PHY link status */
+	for (i = 0; i < MT753X_NUM_PHYS; i++) {
+		val = gsw->mii_read(gsw, i, MII_BMSR);
+		if (val & BMSR_LSTATUS)
+			gsw->phy_link_sts |= BIT(i);
+	}
+
+	val = BIT(MT753X_NUM_PHYS) - 1;
+
+	mt753x_reg_write(gsw, SYS_INT_EN, val);
+}
+
+static void display_port_link_status(struct gsw_mt753x *gsw, u32 port)
+{
+	u32 pmsr, speed_bits;
+	const char *speed;
+
+	pmsr = mt753x_reg_read(gsw, PMSR(port));
+
+	speed_bits = (pmsr & MAC_SPD_STS_M) >> MAC_SPD_STS_S;
+
+	switch (speed_bits) {
+	case MAC_SPD_10:
+		speed = "10Mbps";
+		break;
+	case MAC_SPD_100:
+		speed = "100Mbps";
+		break;
+	case MAC_SPD_1000:
+		speed = "1Gbps";
+		break;
+	case MAC_SPD_2500:
+		speed = "2.5Gbps";
+		break;
+	}
+
+	if (pmsr & MAC_LNK_STS) {
+	dev_info(gsw->dev, "Port %d Link is Up - %s/%s\n",
+		 port, speed, (pmsr & MAC_DPX_STS) ? "Full" : "Half");
+	} else {
+		dev_info(gsw->dev, "Port %d Link is Down\n", port);
+	}
+}
+
+void mt753x_irq_worker(struct work_struct *work)
+{
+	struct gsw_mt753x *gsw;
+	u32 sts, physts, laststs;
+	int i;
+
+	gsw = container_of(work, struct gsw_mt753x, irq_worker);
+
+	sts = mt753x_reg_read(gsw, SYS_INT_STS);
+
+	/* Check for changed PHY link status */
+	for (i = 0; i < MT753X_NUM_PHYS; i++) {
+		if (!(sts & PHY_LC_INT(i)))
+			continue;
+
+		laststs = gsw->phy_link_sts & BIT(i);
+		physts = !!(gsw->mii_read(gsw, i, MII_BMSR) & BMSR_LSTATUS);
+		physts <<= i;
+
+		if (physts ^ laststs) {
+			gsw->phy_link_sts ^= BIT(i);
+			display_port_link_status(gsw, i);
+		}
+	}
+
+	mt753x_reg_write(gsw, SYS_INT_STS, sts);
+
+	enable_irq(gsw->irq);
+}