1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Dave DNET Ethernet Controller driver
5 * Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
10 #define DRV_NAME "dnet"
11 #define PFX DRV_NAME ": "
13 /* Register access macros */
14 #define dnet_writel(port, value, reg) \
15 writel((value), (port)->regs + DNET_##reg)
16 #define dnet_readl(port, reg) readl((port)->regs + DNET_##reg)
18 /* ALL DNET FIFO REGISTERS */
19 #define DNET_RX_LEN_FIFO 0x000 /* RX_LEN_FIFO */
20 #define DNET_RX_DATA_FIFO 0x004 /* RX_DATA_FIFO */
21 #define DNET_TX_LEN_FIFO 0x008 /* TX_LEN_FIFO */
22 #define DNET_TX_DATA_FIFO 0x00C /* TX_DATA_FIFO */
24 /* ALL DNET CONTROL/STATUS REGISTERS OFFSETS */
25 #define DNET_VERCAPS 0x100 /* VERCAPS */
26 #define DNET_INTR_SRC 0x104 /* INTR_SRC */
27 #define DNET_INTR_ENB 0x108 /* INTR_ENB */
28 #define DNET_RX_STATUS 0x10C /* RX_STATUS */
29 #define DNET_TX_STATUS 0x110 /* TX_STATUS */
30 #define DNET_RX_FRAMES_CNT 0x114 /* RX_FRAMES_CNT */
31 #define DNET_TX_FRAMES_CNT 0x118 /* TX_FRAMES_CNT */
32 #define DNET_RX_FIFO_TH 0x11C /* RX_FIFO_TH */
33 #define DNET_TX_FIFO_TH 0x120 /* TX_FIFO_TH */
34 #define DNET_SYS_CTL 0x124 /* SYS_CTL */
35 #define DNET_PAUSE_TMR 0x128 /* PAUSE_TMR */
36 #define DNET_RX_FIFO_WCNT 0x12C /* RX_FIFO_WCNT */
37 #define DNET_TX_FIFO_WCNT 0x130 /* TX_FIFO_WCNT */
39 /* ALL DNET MAC REGISTERS */
40 #define DNET_MACREG_DATA 0x200 /* Mac-Reg Data */
41 #define DNET_MACREG_ADDR 0x204 /* Mac-Reg Addr */
43 /* ALL DNET RX STATISTICS COUNTERS */
44 #define DNET_RX_PKT_IGNR_CNT 0x300
45 #define DNET_RX_LEN_CHK_ERR_CNT 0x304
46 #define DNET_RX_LNG_FRM_CNT 0x308
47 #define DNET_RX_SHRT_FRM_CNT 0x30C
48 #define DNET_RX_IPG_VIOL_CNT 0x310
49 #define DNET_RX_CRC_ERR_CNT 0x314
50 #define DNET_RX_OK_PKT_CNT 0x318
51 #define DNET_RX_CTL_FRM_CNT 0x31C
52 #define DNET_RX_PAUSE_FRM_CNT 0x320
53 #define DNET_RX_MULTICAST_CNT 0x324
54 #define DNET_RX_BROADCAST_CNT 0x328
55 #define DNET_RX_VLAN_TAG_CNT 0x32C
56 #define DNET_RX_PRE_SHRINK_CNT 0x330
57 #define DNET_RX_DRIB_NIB_CNT 0x334
58 #define DNET_RX_UNSUP_OPCD_CNT 0x338
59 #define DNET_RX_BYTE_CNT 0x33C
61 /* DNET TX STATISTICS COUNTERS */
62 #define DNET_TX_UNICAST_CNT 0x400
63 #define DNET_TX_PAUSE_FRM_CNT 0x404
64 #define DNET_TX_MULTICAST_CNT 0x408
65 #define DNET_TX_BRDCAST_CNT 0x40C
66 #define DNET_TX_VLAN_TAG_CNT 0x410
67 #define DNET_TX_BAD_FCS_CNT 0x414
68 #define DNET_TX_JUMBO_CNT 0x418
69 #define DNET_TX_BYTE_CNT 0x41C
71 /* SOME INTERNAL MAC-CORE REGISTER */
72 #define DNET_INTERNAL_MODE_REG 0x0
73 #define DNET_INTERNAL_RXTX_CONTROL_REG 0x2
74 #define DNET_INTERNAL_MAX_PKT_SIZE_REG 0x4
75 #define DNET_INTERNAL_IGP_REG 0x8
76 #define DNET_INTERNAL_MAC_ADDR_0_REG 0xa
77 #define DNET_INTERNAL_MAC_ADDR_1_REG 0xc
78 #define DNET_INTERNAL_MAC_ADDR_2_REG 0xe
79 #define DNET_INTERNAL_TX_RX_STS_REG 0x12
80 #define DNET_INTERNAL_GMII_MNG_CTL_REG 0x14
81 #define DNET_INTERNAL_GMII_MNG_DAT_REG 0x16
83 #define DNET_INTERNAL_GMII_MNG_CMD_FIN (1 << 14)
85 #define DNET_INTERNAL_WRITE (1 << 31)
87 /* MAC-CORE REGISTER FIELDS */
89 /* MAC-CORE MODE REGISTER FIELDS */
90 #define DNET_INTERNAL_MODE_GBITEN (1 << 0)
91 #define DNET_INTERNAL_MODE_FCEN (1 << 1)
92 #define DNET_INTERNAL_MODE_RXEN (1 << 2)
93 #define DNET_INTERNAL_MODE_TXEN (1 << 3)
95 /* MAC-CORE RXTX CONTROL REGISTER FIELDS */
96 #define DNET_INTERNAL_RXTX_CONTROL_RXSHORTFRAME (1 << 8)
97 #define DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST (1 << 7)
98 #define DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST (1 << 4)
99 #define DNET_INTERNAL_RXTX_CONTROL_RXPAUSE (1 << 3)
100 #define DNET_INTERNAL_RXTX_CONTROL_DISTXFCS (1 << 2)
101 #define DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS (1 << 1)
102 #define DNET_INTERNAL_RXTX_CONTROL_ENPROMISC (1 << 0)
103 #define DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL (1 << 6)
104 #define DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP (1 << 5)
106 /* SYSTEM CONTROL REGISTER FIELDS */
107 #define DNET_SYS_CTL_IGNORENEXTPKT (1 << 0)
108 #define DNET_SYS_CTL_SENDPAUSE (1 << 2)
109 #define DNET_SYS_CTL_RXFIFOFLUSH (1 << 3)
110 #define DNET_SYS_CTL_TXFIFOFLUSH (1 << 4)
112 /* TX STATUS REGISTER FIELDS */
113 #define DNET_TX_STATUS_FIFO_ALMOST_EMPTY (1 << 2)
114 #define DNET_TX_STATUS_FIFO_ALMOST_FULL (1 << 1)
116 /* INTERRUPT SOURCE REGISTER FIELDS */
117 #define DNET_INTR_SRC_TX_PKTSENT (1 << 0)
118 #define DNET_INTR_SRC_TX_FIFOAF (1 << 1)
119 #define DNET_INTR_SRC_TX_FIFOAE (1 << 2)
120 #define DNET_INTR_SRC_TX_DISCFRM (1 << 3)
121 #define DNET_INTR_SRC_TX_FIFOFULL (1 << 4)
122 #define DNET_INTR_SRC_RX_CMDFIFOAF (1 << 8)
123 #define DNET_INTR_SRC_RX_CMDFIFOFF (1 << 9)
124 #define DNET_INTR_SRC_RX_DATAFIFOFF (1 << 10)
125 #define DNET_INTR_SRC_TX_SUMMARY (1 << 16)
126 #define DNET_INTR_SRC_RX_SUMMARY (1 << 17)
127 #define DNET_INTR_SRC_PHY (1 << 19)
129 /* INTERRUPT ENABLE REGISTER FIELDS */
130 #define DNET_INTR_ENB_TX_PKTSENT (1 << 0)
131 #define DNET_INTR_ENB_TX_FIFOAF (1 << 1)
132 #define DNET_INTR_ENB_TX_FIFOAE (1 << 2)
133 #define DNET_INTR_ENB_TX_DISCFRM (1 << 3)
134 #define DNET_INTR_ENB_TX_FIFOFULL (1 << 4)
135 #define DNET_INTR_ENB_RX_PKTRDY (1 << 8)
136 #define DNET_INTR_ENB_RX_FIFOAF (1 << 9)
137 #define DNET_INTR_ENB_RX_FIFOERR (1 << 10)
138 #define DNET_INTR_ENB_RX_ERROR (1 << 11)
139 #define DNET_INTR_ENB_RX_FIFOFULL (1 << 12)
140 #define DNET_INTR_ENB_RX_FIFOAE (1 << 13)
141 #define DNET_INTR_ENB_TX_SUMMARY (1 << 16)
142 #define DNET_INTR_ENB_RX_SUMMARY (1 << 17)
143 #define DNET_INTR_ENB_GLOBAL_ENABLE (1 << 18)
146 * almost empty = less than one full sized ethernet frame (no jumbo) inside
147 * the fifo almost full = can write less than one full sized ethernet frame
148 * (no jumbo) inside the fifo
150 #define DNET_CFG_TX_FIFO_FULL_THRES 25
151 #define DNET_CFG_RX_FIFO_FULL_THRES 20
154 * Capabilities. Used by the driver to know the capabilities that the ethernet
155 * controller inside the FPGA have.
158 #define DNET_HAS_MDIO (1 << 0)
159 #define DNET_HAS_IRQ (1 << 1)
160 #define DNET_HAS_GIGABIT (1 << 2)
161 #define DNET_HAS_DMA (1 << 3)
163 #define DNET_HAS_MII (1 << 4) /* or GMII */
164 #define DNET_HAS_RMII (1 << 5) /* or RGMII */
166 #define DNET_CAPS_MASK 0xFFFF
168 #define DNET_FIFO_SIZE 1024 /* 1K x 32 bit */
169 #define DNET_FIFO_TX_DATA_AF_TH (DNET_FIFO_SIZE - 384) /* 384 = 1536 / 4 */
170 #define DNET_FIFO_TX_DATA_AE_TH 384
172 #define DNET_FIFO_RX_CMD_AF_TH (1 << 16) /* just one frame inside the FIFO */
175 * Hardware-collected statistics.
207 struct platform_device *pdev;
208 struct net_device *dev;
209 struct dnet_stats hw_stats;
210 unsigned int capabilities; /* read from FPGA */
211 struct napi_struct napi;
214 struct mii_bus *mii_bus;