1 files changed, 519 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0508-net-next-mediatek-add-support-for-mt7620.patch b/target/linux/ramips/patches-4.4/0508-net-next-mediatek-add-support-for-mt7620.patch
new file mode 100644
index 0000000000..4055026cb5
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0508-net-next-mediatek-add-support-for-mt7620.patch
@@ -0,0 +1,519 @@
+From 1efca7b539a91c49ab1d6484ec3a69c48fa6062b Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 14 Dec 2015 21:25:35 +0100
+Subject: [PATCH 508/513] net-next: mediatek: add support for mt7620
+
+Add support for SoCs from the mt7620 family. This include mt7620 and mt7621.
+These all have one dedicated external gbit port and a builtin 5 port 100mbit
+switch. Additionally one of the 5 switch ports can be changed to become an
+additional gbit port that we can attach a phy to. This patch includes
+rudimentary code to power up the switch. There are a lot of magic values
+that get written to the switch and the internal phys. These values come
+straight from the SDK driver.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+Signed-off-by: Michael Lee <igvtee@gmail.com>
+---
+ drivers/net/ethernet/mediatek/mdio_mt7620.c |  156 +++++++++++++
+ drivers/net/ethernet/mediatek/soc_mt7620.c  |  334 +++++++++++++++++++++++++++
+ 2 files changed, 490 insertions(+)
+ create mode 100644 drivers/net/ethernet/mediatek/mdio_mt7620.c
+ create mode 100644 drivers/net/ethernet/mediatek/soc_mt7620.c
+
+--- /dev/null
++++ b/drivers/net/ethernet/mediatek/mdio_mt7620.c
+@@ -0,0 +1,156 @@
++/*   This program is free software; you can redistribute it and/or modify
++ *   it under the terms of the GNU General Public License as published by
++ *   the Free Software Foundation; version 2 of the License
++ *
++ *   This program is distributed in the hope that it will be useful,
++ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *   GNU General Public License for more details.
++ *
++ *   Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org>
++ *   Copyright (C) 2009-2015 Felix Fietkau <nbd@openwrt.org>
++ *   Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com>
++ */
++
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/types.h>
++
++#include "mtk_eth_soc.h"
++#include "gsw_mt7620.h"
++#include "mdio.h"
++
++static int mt7620_mii_busy_wait(struct mt7620_gsw *gsw)
++{
++	unsigned long t_start = jiffies;
++
++	while (1) {
++		if (!(mtk_switch_r32(gsw, MT7620A_GSW_REG_PIAC) & GSW_MDIO_ACCESS))
++			return 0;
++		if (time_after(jiffies, t_start + GSW_REG_PHY_TIMEOUT))
++			break;
++	}
++
++	dev_err(gsw->dev, "mdio: MDIO timeout\n");
++	return -1;
++}
++
++u32 _mt7620_mii_write(struct mt7620_gsw *gsw, u32 phy_addr,
++			     u32 phy_register, u32 write_data)
++{
++	if (mt7620_mii_busy_wait(gsw))
++		return -1;
++
++	write_data &= 0xffff;
++
++	mtk_switch_w32(gsw, GSW_MDIO_ACCESS | GSW_MDIO_START | GSW_MDIO_WRITE |
++		(phy_register << GSW_MDIO_REG_SHIFT) |
++		(phy_addr << GSW_MDIO_ADDR_SHIFT) | write_data,
++		MT7620A_GSW_REG_PIAC);
++
++	if (mt7620_mii_busy_wait(gsw))
++		return -1;
++
++	return 0;
++}
++
++u32 _mt7620_mii_read(struct mt7620_gsw *gsw, int phy_addr, int phy_reg)
++{
++	u32 d;
++
++	if (mt7620_mii_busy_wait(gsw))
++		return 0xffff;
++
++	mtk_switch_w32(gsw, GSW_MDIO_ACCESS | GSW_MDIO_START | GSW_MDIO_READ |
++		(phy_reg << GSW_MDIO_REG_SHIFT) |
++		(phy_addr << GSW_MDIO_ADDR_SHIFT),
++		MT7620A_GSW_REG_PIAC);
++
++	if (mt7620_mii_busy_wait(gsw))
++		return 0xffff;
++
++	d = mtk_switch_r32(gsw, MT7620A_GSW_REG_PIAC) & 0xffff;
++
++	return d;
++}
++
++int mt7620_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
++{
++	struct fe_priv *priv = bus->priv;
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
++
++	return _mt7620_mii_write(gsw, phy_addr, phy_reg, val);
++}
++
++int mt7620_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
++{
++	struct fe_priv *priv = bus->priv;
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
++
++	return _mt7620_mii_read(gsw, phy_addr, phy_reg);
++}
++
++void mt7530_mdio_w32(struct mt7620_gsw *gsw, u32 reg, u32 val)
++{
++	_mt7620_mii_write(gsw, 0x1f, 0x1f, (reg >> 6) & 0x3ff);
++	_mt7620_mii_write(gsw, 0x1f, (reg >> 2) & 0xf,  val & 0xffff);
++	_mt7620_mii_write(gsw, 0x1f, 0x10, val >> 16);
++}
++
++u32 mt7530_mdio_r32(struct mt7620_gsw *gsw, u32 reg)
++{
++	u16 high, low;
++
++	_mt7620_mii_write(gsw, 0x1f, 0x1f, (reg >> 6) & 0x3ff);
++	low = _mt7620_mii_read(gsw, 0x1f, (reg >> 2) & 0xf);
++	high = _mt7620_mii_read(gsw, 0x1f, 0x10);
++
++	return (high << 16) | (low & 0xffff);
++}
++
++static unsigned char *fe_speed_str(int speed)
++{
++	switch (speed) {
++	case 2:
++	case SPEED_1000:
++		return "1000";
++	case 1:
++	case SPEED_100:
++		return "100";
++	case 0:
++	case SPEED_10:
++		return "10";
++	}
++
++	return "? ";
++}
++
++int mt7620_has_carrier(struct fe_priv *priv)
++{
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
++	int i;
++
++	for (i = 0; i < GSW_PORT6; i++)
++		if (mtk_switch_r32(gsw, GSW_REG_PORT_STATUS(i)) & 0x1)
++			return 1;
++	return 0;
++}
++
++
++void mt7620_print_link_state(struct fe_priv *priv, int port, int link,
++			     int speed, int duplex)
++{
++	if (link)
++		netdev_info(priv->netdev, "port %d link up (%sMbps/%s duplex)\n",
++			    port, fe_speed_str(speed),
++			    (duplex) ? "Full" : "Half");
++	else
++		netdev_info(priv->netdev, "port %d link down\n", port);
++}
++
++void mt7620_mdio_link_adjust(struct fe_priv *priv, int port)
++{
++	mt7620_print_link_state(priv, port, priv->link[port],
++				priv->phy->speed[port],
++				(priv->phy->duplex[port] == DUPLEX_FULL));
++}
+--- /dev/null
++++ b/drivers/net/ethernet/mediatek/soc_mt7620.c
+@@ -0,0 +1,334 @@
++/*   This program is free software; you can redistribute it and/or modify
++ *   it under the terms of the GNU General Public License as published by
++ *   the Free Software Foundation; version 2 of the License
++ *
++ *   This program is distributed in the hope that it will be useful,
++ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *   GNU General Public License for more details.
++ *
++ *   Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org>
++ *   Copyright (C) 2009-2015 Felix Fietkau <nbd@openwrt.org>
++ *   Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com>
++ */
++
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/if_vlan.h>
++#include <linux/of_net.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++
++#include <mt7620.h>
++#include "mtk_eth_soc.h"
++#include "gsw_mt7620.h"
++#include "mt7530.h"
++#include "mdio.h"
++
++#define MT7620A_CDMA_CSG_CFG	0x400
++#define MT7620_DMA_VID		(MT7620A_CDMA_CSG_CFG | 0x30)
++#define MT7621_CDMP_IG_CTRL	(MT7620A_CDMA_CSG_CFG + 0x00)
++#define MT7621_CDMP_EG_CTRL	(MT7620A_CDMA_CSG_CFG + 0x04)
++#define MT7620A_RESET_FE	BIT(21)
++#define MT7621_RESET_FE		BIT(6)
++#define MT7620A_RESET_ESW	BIT(23)
++#define MT7620_L4_VALID		BIT(23)
++#define MT7621_L4_VALID		BIT(24)
++
++#define MT7620_TX_DMA_UDF	BIT(15)
++#define MT7621_TX_DMA_UDF	BIT(19)
++#define TX_DMA_FP_BMAP		((0xff) << 19)
++
++#define CDMA_ICS_EN		BIT(2)
++#define CDMA_UCS_EN		BIT(1)
++#define CDMA_TCS_EN		BIT(0)
++
++#define GDMA_ICS_EN		BIT(22)
++#define GDMA_TCS_EN		BIT(21)
++#define GDMA_UCS_EN		BIT(20)
++
++/* frame engine counters */
++#define MT7620_REG_MIB_OFFSET	0x1000
++#define MT7620_PPE_AC_BCNT0	(MT7620_REG_MIB_OFFSET + 0x00)
++#define MT7620_GDM1_TX_GBCNT	(MT7620_REG_MIB_OFFSET + 0x300)
++#define MT7620_GDM2_TX_GBCNT	(MT7620_GDM1_TX_GBCNT + 0x40)
++
++#define MT7621_REG_MIB_OFFSET	0x2000
++#define MT7621_PPE_AC_BCNT0	(MT7621_REG_MIB_OFFSET + 0x00)
++#define MT7621_GDM1_TX_GBCNT	(MT7621_REG_MIB_OFFSET + 0x400)
++#define MT7621_GDM2_TX_GBCNT	(MT7621_GDM1_TX_GBCNT + 0x40)
++
++#define GSW_REG_GDMA1_MAC_ADRL	0x508
++#define GSW_REG_GDMA1_MAC_ADRH	0x50C
++
++#define MT7621_FE_RST_GL	(FE_FE_OFFSET + 0x04)
++#define MT7620_FE_INT_STATUS2	(FE_FE_OFFSET + 0x08)
++
++/* FE_INT_STATUS reg on mt7620 define CNT_GDM1_AF at BIT(29)
++ * but after test it should be BIT(13).
++ */
++#define MT7620_FE_GDM1_AF	BIT(13)
++#define MT7621_FE_GDM1_AF	BIT(28)
++#define MT7621_FE_GDM2_AF	BIT(29)
++
++static const u16 mt7620_reg_table[FE_REG_COUNT] = {
++	[FE_REG_PDMA_GLO_CFG] = RT5350_PDMA_GLO_CFG,
++	[FE_REG_PDMA_RST_CFG] = RT5350_PDMA_RST_CFG,
++	[FE_REG_DLY_INT_CFG] = RT5350_DLY_INT_CFG,
++	[FE_REG_TX_BASE_PTR0] = RT5350_TX_BASE_PTR0,
++	[FE_REG_TX_MAX_CNT0] = RT5350_TX_MAX_CNT0,
++	[FE_REG_TX_CTX_IDX0] = RT5350_TX_CTX_IDX0,
++	[FE_REG_TX_DTX_IDX0] = RT5350_TX_DTX_IDX0,
++	[FE_REG_RX_BASE_PTR0] = RT5350_RX_BASE_PTR0,
++	[FE_REG_RX_MAX_CNT0] = RT5350_RX_MAX_CNT0,
++	[FE_REG_RX_CALC_IDX0] = RT5350_RX_CALC_IDX0,
++	[FE_REG_RX_DRX_IDX0] = RT5350_RX_DRX_IDX0,
++	[FE_REG_FE_INT_ENABLE] = RT5350_FE_INT_ENABLE,
++	[FE_REG_FE_INT_STATUS] = RT5350_FE_INT_STATUS,
++	[FE_REG_FE_DMA_VID_BASE] = MT7620_DMA_VID,
++	[FE_REG_FE_COUNTER_BASE] = MT7620_GDM1_TX_GBCNT,
++	[FE_REG_FE_RST_GL] = MT7621_FE_RST_GL,
++	[FE_REG_FE_INT_STATUS2] = MT7620_FE_INT_STATUS2,
++};
++
++static int mt7620_gsw_config(struct fe_priv *priv)
++{
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *) priv->soc->swpriv;
++
++	/* is the mt7530 internal or external */
++	if (priv->mii_bus && priv->mii_bus->phy_map[0x1f]) {
++		mt7530_probe(priv->device, gsw->base, NULL, 0);
++		mt7530_probe(priv->device, NULL, priv->mii_bus, 1);
++	} else {
++		mt7530_probe(priv->device, gsw->base, NULL, 1);
++	}
++
++	return 0;
++}
++
++static void mt7620_set_mac(struct fe_priv *priv, unsigned char *mac)
++{
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
++	unsigned long flags;
++
++	spin_lock_irqsave(&priv->page_lock, flags);
++	mtk_switch_w32(gsw, (mac[0] << 8) | mac[1], GSW_REG_SMACCR1);
++	mtk_switch_w32(gsw, (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
++		GSW_REG_SMACCR0);
++	spin_unlock_irqrestore(&priv->page_lock, flags);
++}
++
++static void mt7620_auto_poll(struct mt7620_gsw *gsw)
++{
++	int phy;
++	int lsb = -1, msb = 0;
++
++	for_each_set_bit(phy, &gsw->autopoll, 32) {
++		if (lsb < 0)
++			lsb = phy;
++		msb = phy;
++	}
++
++	if (lsb == msb)
++		lsb--;
++
++	mtk_switch_w32(gsw, PHY_AN_EN | PHY_PRE_EN | PMY_MDC_CONF(5) |
++		(msb << 8) | lsb, ESW_PHY_POLLING);
++}
++
++static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
++{
++	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
++	const __be32 *_id = of_get_property(np, "reg", NULL);
++	int phy_mode, size, id;
++	int shift = 12;
++	u32 val, mask = 0;
++	int min = (gsw->port4 == PORT4_EPHY) ? (5) : (4);
++
++	if (!_id || (be32_to_cpu(*_id) < min) || (be32_to_cpu(*_id) > 5)) {
++		if (_id)
++			pr_err("%s: invalid port id %d\n", np->name,
++			       be32_to_cpu(*_id));
++		else
++			pr_err("%s: invalid port id\n", np->name);
++		return;
++	}
++
++	id = be32_to_cpu(*_id);
++
++	if (id == 4)
++		shift = 14;
++
++	priv->phy->phy_fixed[id] = of_get_property(np, "mediatek,fixed-link",
++						   &size);
++	if (priv->phy->phy_fixed[id] &&
++	    (size != (4 * sizeof(*priv->phy->phy_fixed[id])))) {
++		pr_err("%s: invalid fixed link property\n", np->name);
++		priv->phy->phy_fixed[id] = NULL;
++		return;
++	}
++
++	phy_mode = of_get_phy_mode(np);
++	switch (phy_mode) {
++	case PHY_INTERFACE_MODE_RGMII:
++		mask = 0;
++		break;
++	case PHY_INTERFACE_MODE_MII:
++		mask = 1;
++		break;
++	case PHY_INTERFACE_MODE_RMII:
++		mask = 2;
++		break;
++	default:
++		dev_err(priv->device, "port %d - invalid phy mode\n", id);
++		return;
++	}
++
++	priv->phy->phy_node[id] = of_parse_phandle(np, "phy-handle", 0);
++	if (!priv->phy->phy_node[id] && !priv->phy->phy_fixed[id])
++		return;
++
++	val = rt_sysc_r32(SYSC_REG_CFG1);
++	val &= ~(3 << shift);
++	val |= mask << shift;
++	rt_sysc_w32(val, SYSC_REG_CFG1);
++
++	if (priv->phy->phy_fixed[id]) {
++		const __be32 *link = priv->phy->phy_fixed[id];
++		int tx_fc, rx_fc;
++		u32 val = 0;
++
++		priv->phy->speed[id] = be32_to_cpup(link++);
++		tx_fc = be32_to_cpup(link++);
++		rx_fc = be32_to_cpup(link++);
++		priv->phy->duplex[id] = be32_to_cpup(link++);
++		priv->link[id] = 1;
++
++		switch (priv->phy->speed[id]) {
++		case SPEED_10:
++			val = 0;
++			break;
++		case SPEED_100:
++			val = 1;
++			break;
++		case SPEED_1000:
++			val = 2;
++			break;
++		default:
++			dev_err(priv->device, "invalid link speed: %d\n",
++				priv->phy->speed[id]);
++			priv->phy->phy_fixed[id] = 0;
++			return;
++		}
++		val = PMCR_SPEED(val);
++		val |= PMCR_LINK | PMCR_BACKPRES | PMCR_BACKOFF | PMCR_RX_EN |
++			PMCR_TX_EN | PMCR_FORCE | PMCR_MAC_MODE | PMCR_IPG;
++		if (tx_fc)
++			val |= PMCR_TX_FC;
++		if (rx_fc)
++			val |= PMCR_RX_FC;
++		if (priv->phy->duplex[id])
++			val |= PMCR_DUPLEX;
++		mtk_switch_w32(gsw, val, GSW_REG_PORT_PMCR(id));
++		dev_info(priv->device, "using fixed link parameters\n");
++		return;
++	}
++
++	if (priv->phy->phy_node[id] && priv->mii_bus->phy_map[id]) {
++		u32 val = PMCR_BACKPRES | PMCR_BACKOFF | PMCR_RX_EN |
++			PMCR_TX_EN |  PMCR_MAC_MODE | PMCR_IPG;
++
++		mtk_switch_w32(gsw, val, GSW_REG_PORT_PMCR(id));
++		fe_connect_phy_node(priv, priv->phy->phy_node[id]);
++		gsw->autopoll |= BIT(id);
++		mt7620_auto_poll(gsw);
++		return;
++	}
++}
++
++static void mt7620_fe_reset(void)
++{
++	fe_reset(MT7620A_RESET_FE | MT7620A_RESET_ESW);
++}
++
++static void mt7620_rxcsum_config(bool enable)
++{
++	if (enable)
++		fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) | (GDMA_ICS_EN |
++					GDMA_TCS_EN | GDMA_UCS_EN),
++				MT7620A_GDMA1_FWD_CFG);
++	else
++		fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) & ~(GDMA_ICS_EN |
++					GDMA_TCS_EN | GDMA_UCS_EN),
++				MT7620A_GDMA1_FWD_CFG);
++}
++
++static void mt7620_txcsum_config(bool enable)
++{
++	if (enable)
++		fe_w32(fe_r32(MT7620A_CDMA_CSG_CFG) | (CDMA_ICS_EN |
++					CDMA_UCS_EN | CDMA_TCS_EN),
++				MT7620A_CDMA_CSG_CFG);
++	else
++		fe_w32(fe_r32(MT7620A_CDMA_CSG_CFG) & ~(CDMA_ICS_EN |
++					CDMA_UCS_EN | CDMA_TCS_EN),
++				MT7620A_CDMA_CSG_CFG);
++}
++
++static int mt7620_fwd_config(struct fe_priv *priv)
++{
++	struct net_device *dev = priv_netdev(priv);
++
++	fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) & ~7, MT7620A_GDMA1_FWD_CFG);
++
++	mt7620_txcsum_config((dev->features & NETIF_F_IP_CSUM));
++	mt7620_rxcsum_config((dev->features & NETIF_F_RXCSUM));
++
++	return 0;
++}
++
++static void mt7620_tx_dma(struct fe_tx_dma *txd)
++{
++}
++
++static void mt7620_init_data(struct fe_soc_data *data,
++			     struct net_device *netdev)
++{
++	struct fe_priv *priv = netdev_priv(netdev);
++
++	priv->flags = FE_FLAG_PADDING_64B | FE_FLAG_RX_2B_OFFSET |
++		FE_FLAG_RX_SG_DMA | FE_FLAG_HAS_SWITCH;
++
++	netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
++		NETIF_F_HW_VLAN_CTAG_TX;
++	if (mt7620_get_eco() >= 5)
++		netdev->hw_features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 |
++			NETIF_F_IPV6_CSUM;
++}
++
++static struct fe_soc_data mt7620_data = {
++	.init_data = mt7620_init_data,
++	.reset_fe = mt7620_fe_reset,
++	.set_mac = mt7620_set_mac,
++	.fwd_config = mt7620_fwd_config,
++	.tx_dma = mt7620_tx_dma,
++	.switch_init = mtk_gsw_init,
++	.port_init = mt7620_port_init,
++	.reg_table = mt7620_reg_table,
++	.pdma_glo_cfg = FE_PDMA_SIZE_16DWORDS,
++	.rx_int = RT5350_RX_DONE_INT,
++	.tx_int = RT5350_TX_DONE_INT,
++	.status_int = MT7620_FE_GDM1_AF,
++	.checksum_bit = MT7620_L4_VALID,
++	.has_carrier = mt7620_has_carrier,
++	.mdio_read = mt7620_mdio_read,
++	.mdio_write = mt7620_mdio_write,
++	.mdio_adjust_link = mt7620_mdio_link_adjust,
++};
++
++const struct of_device_id of_fe_match[] = {
++	{ .compatible = "mediatek,mt7620-eth", .data = &mt7620_data },
++	{},
++};
++
++MODULE_DEVICE_TABLE(of, of_fe_match);