target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; version 2 of the License
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  14  *
  15  *   Copyright (C) 2009-2013 John Crispin <blogic@openwrt.org>
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/if_vlan.h>
  21
  22 #include <asm/mach-ralink/ralink_regs.h>
  23
  24 #include <mt7620.h>
  25 #include "ralink_soc_eth.h"
  26 #include "gsw_mt7620a.h"
  27
  28 #define MT7620A_CDMA_CSG_CFG    0x400
  29 #define MT7620_DMA_VID          (MT7620A_CDMA_CSG_CFG | 0x30)
  30 #define MT7621_DMA_VID          0xa8
  31 #define MT7620A_DMA_2B_OFFSET   BIT(31)
  32 #define MT7620A_RESET_FE        BIT(21)
  33 #define MT7621_RESET_FE         BIT(6)
  34 #define MT7620A_RESET_ESW       BIT(23)
  35 #define MT7620_L4_VALID         BIT(23)
  36 #define MT7621_L4_VALID         BIT(24)
  37
  38 #define MT7620_TX_DMA_UDF       BIT(15)
  39 #define MT7621_TX_DMA_UDF       BIT(19)
  40 #define TX_DMA_FP_BMAP          ((0xff) << 19)
  41
  42 #define SYSC_REG_RESET_CTRL     0x34
  43
  44 #define CDMA_ICS_EN             BIT(2)
  45 #define CDMA_UCS_EN             BIT(1)
  46 #define CDMA_TCS_EN             BIT(0)
  47
  48 #define GDMA_ICS_EN             BIT(22)
  49 #define GDMA_TCS_EN             BIT(21)
  50 #define GDMA_UCS_EN             BIT(20)
  51
  52 /* frame engine counters */
  53 #define MT7620_REG_MIB_OFFSET   0x1000
  54 #define MT7620_PPE_AC_BCNT0     (MT7620_REG_MIB_OFFSET + 0x00)
  55 #define MT7620_GDM1_TX_GBCNT    (MT7620_REG_MIB_OFFSET + 0x300)
  56 #define MT7620_GDM2_TX_GBCNT    (MT7620_GDM1_TX_GBCNT + 0x40)
  57
  58 #define GSW_REG_GDMA1_MAC_ADRL  0x508
  59 #define GSW_REG_GDMA1_MAC_ADRH  0x50C
  60
  61 #define MT7621_FE_RST_GL        (FE_FE_OFFSET + 0x04)
  62
  63 static const u32 mt7620_reg_table[FE_REG_COUNT] = {
  64         [FE_REG_PDMA_GLO_CFG] = RT5350_PDMA_GLO_CFG,
  65         [FE_REG_PDMA_RST_CFG] = RT5350_PDMA_RST_CFG,
  66         [FE_REG_DLY_INT_CFG] = RT5350_DLY_INT_CFG,
  67         [FE_REG_TX_BASE_PTR0] = RT5350_TX_BASE_PTR0,
  68         [FE_REG_TX_MAX_CNT0] = RT5350_TX_MAX_CNT0,
  69         [FE_REG_TX_CTX_IDX0] = RT5350_TX_CTX_IDX0,
  70         [FE_REG_RX_BASE_PTR0] = RT5350_RX_BASE_PTR0,
  71         [FE_REG_RX_MAX_CNT0] = RT5350_RX_MAX_CNT0,
  72         [FE_REG_RX_CALC_IDX0] = RT5350_RX_CALC_IDX0,
  73         [FE_REG_FE_INT_ENABLE] = RT5350_FE_INT_ENABLE,
  74         [FE_REG_FE_INT_STATUS] = RT5350_FE_INT_STATUS,
  75         [FE_REG_FE_DMA_VID_BASE] = MT7620_DMA_VID,
  76         [FE_REG_FE_COUNTER_BASE] = MT7620_GDM1_TX_GBCNT,
  77         [FE_REG_FE_RST_GL] = MT7621_FE_RST_GL,
  78 };
  79
  80 static const u32 mt7621_reg_table[FE_REG_COUNT] = {
  81         [FE_REG_PDMA_GLO_CFG] = RT5350_PDMA_GLO_CFG,
  82         [FE_REG_PDMA_RST_CFG] = RT5350_PDMA_RST_CFG,
  83         [FE_REG_DLY_INT_CFG] = RT5350_DLY_INT_CFG,
  84         [FE_REG_TX_BASE_PTR0] = RT5350_TX_BASE_PTR0,
  85         [FE_REG_TX_MAX_CNT0] = RT5350_TX_MAX_CNT0,
  86         [FE_REG_TX_CTX_IDX0] = RT5350_TX_CTX_IDX0,
  87         [FE_REG_RX_BASE_PTR0] = RT5350_RX_BASE_PTR0,
  88         [FE_REG_RX_MAX_CNT0] = RT5350_RX_MAX_CNT0,
  89         [FE_REG_RX_CALC_IDX0] = RT5350_RX_CALC_IDX0,
  90         [FE_REG_FE_INT_ENABLE] = RT5350_FE_INT_ENABLE,
  91         [FE_REG_FE_INT_STATUS] = RT5350_FE_INT_STATUS,
  92         [FE_REG_FE_DMA_VID_BASE] = MT7621_DMA_VID,
  93         [FE_REG_FE_COUNTER_BASE] = MT7620_GDM1_TX_GBCNT,
  94         [FE_REG_FE_RST_GL] = MT7621_FE_RST_GL,
  95 };
  96
  97 static void mt7620_fe_reset(void)
  98 {
  99         u32 val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
 100
 101         rt_sysc_w32(val | MT7620A_RESET_FE | MT7620A_RESET_ESW, SYSC_REG_RESET_CTRL);
 102         rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
 103 }
 104
 105 static void mt7621_fe_reset(void)
 106 {
 107         u32 val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
 108
 109         rt_sysc_w32(val | MT7621_RESET_FE, SYSC_REG_RESET_CTRL);
 110         rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
 111 }
 112
 113 static void mt7620_rxcsum_config(bool enable)
 114 {
 115         if (enable)
 116                 fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) | (GDMA_ICS_EN |
 117                                         GDMA_TCS_EN | GDMA_UCS_EN),
 118                                 MT7620A_GDMA1_FWD_CFG);
 119         else
 120                 fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) & ~(GDMA_ICS_EN |
 121                                         GDMA_TCS_EN | GDMA_UCS_EN),
 122                                 MT7620A_GDMA1_FWD_CFG);
 123 }
 124
 125 static void mt7620_txcsum_config(bool enable)
 126 {
 127         if (enable)
 128                 fe_w32(fe_r32(MT7620A_CDMA_CSG_CFG) | (CDMA_ICS_EN |
 129                                         CDMA_UCS_EN | CDMA_TCS_EN),
 130                                 MT7620A_CDMA_CSG_CFG);
 131         else
 132                 fe_w32(fe_r32(MT7620A_CDMA_CSG_CFG) & ~(CDMA_ICS_EN |
 133                                         CDMA_UCS_EN | CDMA_TCS_EN),
 134                                 MT7620A_CDMA_CSG_CFG);
 135 }
 136
 137 static int mt7620_fwd_config(struct fe_priv *priv)
 138 {
 139         struct net_device *dev = priv_netdev(priv);
 140
 141         fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) & ~7, MT7620A_GDMA1_FWD_CFG);
 142
 143         mt7620_txcsum_config((dev->features & NETIF_F_IP_CSUM));
 144         mt7620_rxcsum_config((dev->features & NETIF_F_RXCSUM));
 145
 146         return 0;
 147 }
 148
 149 static int mt7621_fwd_config(struct fe_priv *priv)
 150 {
 151         struct net_device *dev = priv_netdev(priv);
 152
 153         fe_w32(fe_r32(MT7620A_GDMA1_FWD_CFG) & ~0xffff, MT7620A_GDMA1_FWD_CFG);
 154
 155         mt7620_txcsum_config((dev->features & NETIF_F_IP_CSUM));
 156         mt7620_rxcsum_config((dev->features & NETIF_F_RXCSUM));
 157
 158         return 0;
 159 }
 160
 161 static void mt7620_tx_dma(struct fe_priv *priv, int idx, struct sk_buff *skb)
 162 {
 163         priv->tx_dma[idx].txd4 = 0;
 164 }
 165
 166 static void mt7621_tx_dma(struct fe_priv *priv, int idx, struct sk_buff *skb)
 167 {
 168         priv->tx_dma[idx].txd4 = BIT(25);
 169 }
 170
 171 static void mt7620_rx_dma(struct fe_priv *priv, int idx, int len)
 172 {
 173         priv->rx_dma[idx].rxd2 = RX_DMA_PLEN0(len);
 174 }
 175
 176 static void mt7620_init_data(struct fe_soc_data *data,
 177                 struct net_device *netdev)
 178 {
 179         struct fe_priv *priv = netdev_priv(netdev);
 180
 181         priv->flags = FE_FLAG_PADDING_64B;
 182         netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
 183                 NETIF_F_HW_VLAN_CTAG_TX;
 184
 185         if (mt7620_get_eco() >= 5 || IS_ENABLED(CONFIG_SOC_MT7621))
 186                 netdev->hw_features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 |
 187                         NETIF_F_IPV6_CSUM;
 188 }
 189
 190 static void mt7621_set_mac(struct fe_priv *priv, unsigned char *mac)
 191 {
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&priv->page_lock, flags);
 195         fe_w32((mac[0] << 8) | mac[1], GSW_REG_GDMA1_MAC_ADRH);
 196         fe_w32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
 197                 GSW_REG_GDMA1_MAC_ADRL);
 198         spin_unlock_irqrestore(&priv->page_lock, flags);
 199 }
 200
 201 static struct fe_soc_data mt7620_data = {
 202         .mac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
 203         .init_data = mt7620_init_data,
 204         .reset_fe = mt7620_fe_reset,
 205         .set_mac = mt7620_set_mac,
 206         .fwd_config = mt7620_fwd_config,
 207         .tx_dma = mt7620_tx_dma,
 208         .rx_dma = mt7620_rx_dma,
 209         .switch_init = mt7620_gsw_probe,
 210         .switch_config = mt7620_gsw_config,
 211         .port_init = mt7620_port_init,
 212         .reg_table = mt7620_reg_table,
 213         .pdma_glo_cfg = FE_PDMA_SIZE_16DWORDS | MT7620A_DMA_2B_OFFSET,
 214         .rx_dly_int = RT5350_RX_DLY_INT,
 215         .tx_dly_int = RT5350_TX_DLY_INT,
 216         .checksum_bit = MT7620_L4_VALID,
 217         .tx_udf_bit = MT7620_TX_DMA_UDF,
 218         .has_carrier = mt7620a_has_carrier,
 219         .mdio_read = mt7620_mdio_read,
 220         .mdio_write = mt7620_mdio_write,
 221         .mdio_adjust_link = mt7620_mdio_link_adjust,
 222 };
 223
 224 static struct fe_soc_data mt7621_data = {
 225         .mac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
 226         .init_data = mt7620_init_data,
 227         .reset_fe = mt7621_fe_reset,
 228         .set_mac = mt7621_set_mac,
 229         .fwd_config = mt7621_fwd_config,
 230         .tx_dma = mt7621_tx_dma,
 231         .rx_dma = mt7620_rx_dma,
 232         .switch_init = mt7620_gsw_probe,
 233         .switch_config = mt7621_gsw_config,
 234         .reg_table = mt7621_reg_table,
 235         .pdma_glo_cfg = FE_PDMA_SIZE_16DWORDS | MT7620A_DMA_2B_OFFSET,
 236         .rx_dly_int = RT5350_RX_DLY_INT,
 237         .tx_dly_int = RT5350_TX_DLY_INT,
 238         .checksum_bit = MT7621_L4_VALID,
 239         .tx_udf_bit = MT7621_TX_DMA_UDF,
 240         .has_carrier = mt7620a_has_carrier,
 241         .mdio_read = mt7620_mdio_read,
 242         .mdio_write = mt7620_mdio_write,
 243         .mdio_adjust_link = mt7620_mdio_link_adjust,
 244 };
 245
 246 const struct of_device_id of_fe_match[] = {
 247         { .compatible = "ralink,mt7620a-eth", .data = &mt7620_data },
 248         { .compatible = "ralink,mt7621-eth", .data = &mt7621_data },
 249         {},
 250 };
 251
 252 MODULE_DEVICE_TABLE(of, of_fe_match);