1 /*
2  *
3  * Alchemy Au1x00 ethernet driver include file
4  *
5  * Author: Pete Popov <ppopov@mvista.com>
6  *
7  * Copyright 2001 MontaVista Software Inc.
8  *
9  * ########################################################################
10  *
11  *  This program is free software; you can distribute it and/or modify it
12  *  under the terms of the GNU General Public License (Version 2) as
13  *  published by the Free Software Foundation.
14  *
15  *  This program is distributed in the hope it will be useful, but WITHOUT
16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
18  *  for more details.
19  *
20  *  You should have received a copy of the GNU General Public License along
21  *  with this program; if not, see <http://www.gnu.org/licenses/>.
22  *
23  * ########################################################################
24  *
25  *
26  */
27 
28 
29 #define MAC_IOSIZE 0x10000
30 #define NUM_RX_DMA 4       /* Au1x00 has 4 rx hardware descriptors */
31 #define NUM_TX_DMA 4       /* Au1x00 has 4 tx hardware descriptors */
32 
33 #define NUM_RX_BUFFS 4
34 #define NUM_TX_BUFFS 4
35 #define MAX_BUF_SIZE 2048
36 
37 #define ETH_TX_TIMEOUT (HZ/4)
38 #define MAC_MIN_PKT_SIZE 64
39 
40 #define MULTICAST_FILTER_LIMIT 64
41 
42 /*
43  * Data Buffer Descriptor. Data buffers must be aligned on 32 byte
44  * boundary for both, receive and transmit.
45  */
46 struct db_dest {
47 	struct db_dest *pnext;
48 	u32 *vaddr;
49 	dma_addr_t dma_addr;
50 };
51 
52 /*
53  * The transmit and receive descriptors are memory
54  * mapped registers.
55  */
56 struct tx_dma {
57 	u32 status;
58 	u32 buff_stat;
59 	u32 len;
60 	u32 pad;
61 };
62 
63 struct rx_dma {
64 	u32 status;
65 	u32 buff_stat;
66 	u32 pad[2];
67 };
68 
69 
70 /*
71  * MAC control registers, memory mapped.
72  */
73 struct mac_reg {
74 	u32 control;
75 	u32 mac_addr_high;
76 	u32 mac_addr_low;
77 	u32 multi_hash_high;
78 	u32 multi_hash_low;
79 	u32 mii_control;
80 	u32 mii_data;
81 	u32 flow_control;
82 	u32 vlan1_tag;
83 	u32 vlan2_tag;
84 };
85 
86 
87 struct au1000_private {
88 	struct db_dest *pDBfree;
89 	struct db_dest db[NUM_RX_BUFFS+NUM_TX_BUFFS];
90 	struct rx_dma *rx_dma_ring[NUM_RX_DMA];
91 	struct tx_dma *tx_dma_ring[NUM_TX_DMA];
92 	struct db_dest *rx_db_inuse[NUM_RX_DMA];
93 	struct db_dest *tx_db_inuse[NUM_TX_DMA];
94 	u32 rx_head;
95 	u32 tx_head;
96 	u32 tx_tail;
97 	u32 tx_full;
98 
99 	int mac_id;
100 
101 	int mac_enabled;       /* whether MAC is currently enabled and running
102 				* (req. for mdio)
103 				*/
104 
105 	int old_link;          /* used by au1000_adjust_link */
106 	int old_speed;
107 	int old_duplex;
108 
109 	struct mii_bus *mii_bus;
110 
111 	/* PHY configuration */
112 	int phy_static_config;
113 	int phy_search_highest_addr;
114 	int phy1_search_mac0;
115 
116 	int phy_addr;
117 	int phy_busid;
118 	int phy_irq;
119 
120 	/* These variables are just for quick access
121 	 * to certain regs addresses.
122 	 */
123 	struct mac_reg *mac;  /* mac registers                      */
124 	u32 *enable;     /* address of MAC Enable Register     */
125 	void __iomem *macdma;	/* base of MAC DMA port */
126 	u32 vaddr;                /* virtual address of rx/tx buffers   */
127 	dma_addr_t dma_addr;      /* dma address of rx/tx buffers       */
128 
129 	spinlock_t lock;       /* Serialise access to device */
130 
131 	u32 msg_enable;
132 };
133