OpenWrt – Rev 4
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/* 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@nbd.name>
* 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 && mdiobus_get_phy(priv->mii_bus, 0x1f)) {
mt7530_probe(priv->dev, gsw->base, NULL, 0);
mt7530_probe(priv->dev, NULL, priv->mii_bus, 1);
} else {
mt7530_probe(priv->dev, 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->dev, "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->dev, "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->dev, "using fixed link parameters\n");
return;
}
if (priv->phy->phy_node[id] && mdiobus_get_phy(priv->mii_bus, 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,
.switch_config = mt7620_gsw_config,
.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);