1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 *
4 * Alchemy Au1x00 ethernet driver include file
5 *
6 * Author: Pete Popov <ppopov@mvista.com>
7 *
8 * Copyright 2001 MontaVista Software Inc.
9 */
10
11
12 #define MAC_IOSIZE 0x10000
13 #define NUM_RX_DMA 4 /* Au1x00 has 4 rx hardware descriptors */
14 #define NUM_TX_DMA 4 /* Au1x00 has 4 tx hardware descriptors */
15
16 #define NUM_RX_BUFFS 4
17 #define NUM_TX_BUFFS 4
18 #define MAX_BUF_SIZE 2048
19
20 #define ETH_TX_TIMEOUT (HZ/4)
21 #define MAC_MIN_PKT_SIZE 64
22
23 #define MULTICAST_FILTER_LIMIT 64
24
25 /*
26 * Data Buffer Descriptor. Data buffers must be aligned on 32 byte
27 * boundary for both, receive and transmit.
28 */
29 struct db_dest {
30 struct db_dest *pnext;
31 u32 *vaddr;
32 dma_addr_t dma_addr;
33 };
34
35 /*
36 * The transmit and receive descriptors are memory
37 * mapped registers.
38 */
39 struct tx_dma {
40 u32 status;
41 u32 buff_stat;
42 u32 len;
43 u32 pad;
44 };
45
46 struct rx_dma {
47 u32 status;
48 u32 buff_stat;
49 u32 pad[2];
50 };
51
52
53 /*
54 * MAC control registers, memory mapped.
55 */
56 struct mac_reg {
57 u32 control;
58 u32 mac_addr_high;
59 u32 mac_addr_low;
60 u32 multi_hash_high;
61 u32 multi_hash_low;
62 u32 mii_control;
63 u32 mii_data;
64 u32 flow_control;
65 u32 vlan1_tag;
66 u32 vlan2_tag;
67 };
68
69
70 struct au1000_private {
71 struct db_dest *pDBfree;
72 struct db_dest db[NUM_RX_BUFFS+NUM_TX_BUFFS];
73 struct rx_dma *rx_dma_ring[NUM_RX_DMA];
74 struct tx_dma *tx_dma_ring[NUM_TX_DMA];
75 struct db_dest *rx_db_inuse[NUM_RX_DMA];
76 struct db_dest *tx_db_inuse[NUM_TX_DMA];
77 u32 rx_head;
78 u32 tx_head;
79 u32 tx_tail;
80 u32 tx_full;
81
82 int mac_id;
83
84 int mac_enabled; /* whether MAC is currently enabled and running
85 * (req. for mdio)
86 */
87
88 int old_link; /* used by au1000_adjust_link */
89 int old_speed;
90 int old_duplex;
91
92 struct mii_bus *mii_bus;
93
94 /* PHY configuration */
95 int phy_static_config;
96 int phy_search_highest_addr;
97 int phy1_search_mac0;
98
99 int phy_addr;
100 int phy_busid;
101 int phy_irq;
102
103 /* These variables are just for quick access
104 * to certain regs addresses.
105 */
106 struct mac_reg *mac; /* mac registers */
107 u32 *enable; /* address of MAC Enable Register */
108 void __iomem *macdma; /* base of MAC DMA port */
109 u32 vaddr; /* virtual address of rx/tx buffers */
110 dma_addr_t dma_addr; /* dma address of rx/tx buffers */
111
112 spinlock_t lock; /* Serialise access to device */
113
114 u32 msg_enable;
115 };