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1#ifndef __S3C4510B_ETH_H
2#define __S3C4510B_ETH_H
3/*
4 * Copyright (c) 2004 Cucy Systems (http://www.cucy.com)
5 * Curt Brune <curt@cucy.com>
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 *
25 * MODULE: $Id:$
26 * Description: Ethernet interface
27 * Runtime Env: ARM7TDMI
28 * Change History:
29 * 03-02-04 Create (Curt Brune) curt@cucy.com
30 *
31 */
32
33#define __packed __attribute__ ((packed))
34
35#define ETH_MAC_ADDR_SIZE (6) /* dst,src addr is 6bytes each */
36#define ETH_MaxTxFrames (16) /* Max number of Tx Frames */
37
38/* Buffered DMA Receiver Control Register */
39#define ETH_BRxBRST 0x0000F /* BDMA Rx Burst Size * BRxBRST */
40 /* = Burst Data Size 16 */
41#define ETH_BRxSTSKO 0x00020 /* BDMA Rx Stop/Skip Frame or Interrupt(=1) */
42 /* case of not OWNER the current Frame */
43#define ETH_BRxMAINC 0x00040 /* BDMA Rx Memory Address Inc/Dec */
44#define ETH_BRxDIE 0x00080 /* BDMA Rx Every Received Frame Interrupt Enable */
45#define ETH_BRxNLIE 0x00100 /* BDMA Rx NULL List Interrupt Enable */
46#define ETH_BRxNOIE 0x00200 /* BDMA Rx Not Owner Interrupt Enable */
47#define ETH_BRxMSOIE 0x00400 /* BDMA Rx Maximum Size over Interrupr Enable */
48#define ETH_BRxLittle 0x00800 /* BDMA Rx Big/Little Endian */
49#define ETH_BRxBig 0x00000 /* BDMA Rx Big/Little Endian */
50#define ETH_BRxWA01 0x01000 /* BDMA Rx Word Alignment- one invalid byte */
51#define ETH_BRxWA10 0x02000 /* BDMA Rx Word Alignment- two invalid byte */
52#define ETH_BRxWA11 0x03000 /* BDMA Rx Word Alignment- three invalid byte */
53#define ETH_BRxEn 0x04000 /* BDMA Rx Enable */
54#define ETH_BRxRS 0x08000 /* BDMA Rx Reset */
55#define ETH_RxEmpty 0x10000 /* BDMA Rx Buffer empty interrupt */
56#define ETH_BRxEarly 0x20000 /* BDMA Rx Early notify Interrupt */
57
58/* Buffered DMA Trasmit Control Register(BDMATXCON) */
59#define ETH_BTxBRST 0x0000F /* BDMA Tx Burst Size = 16 */
60#define ETH_BTxSTSKO 0x00020 /* BDMA Tx Stop/Skip Frame or Interrupt in case */
61 /* of not Owner the current frame */
62#define ETH_BTxCPIE 0x00080 /* BDMA Tx Complete to send control */
63 /* packet Enable */
64#define ETH_BTxNOIE 0x00200 /* BDMA Tx Buffer Not Owner */
65#define ETH_BTxEmpty 0x00400 /* BDMA Tx Buffer Empty Interrupt */
66
67/* BDMA Tx buffer can be moved to the MAC Tx IO when the new frame comes in. */
68#define ETH_BTxMSL000 0x00000 /* No wait to fill the BDMA */
69#define ETH_BTxMSL001 0x00800 /* wait to fill 1/8 of the BDMA */
70#define ETH_BTxMSL010 0x01000 /* wait to fill 2/8 of the BDMA */
71#define ETH_BTxMSL011 0x01800 /* wait to fill 3/8 of the BDMA */
72#define ETH_BTxMSL100 0x02000 /* wait to fill 4/8 of the BDMA */
73#define ETH_BTxMSL101 0x02800 /* wait to fill 5/8 of the BDMA */
74#define ETH_BTxMSL110 0x03000 /* wait to fill 6/8 of the BDMA */
75#define ETH_BTxMSL111 0x03800 /* wait to fill 7/8 of the BDMA */
76#define ETH_BTxEn 0x04000 /* BDMA Tx Enable */
77#define ETH_BTxRS 0x08000 /* BDMA Tx Reset */
78
79/* BDMA Status Register */
80#define ETH_S_BRxRDF 0x00001 /* BDMA Rx Done Every Received Frame */
81#define ETH_S_BRxNL 0x00002 /* BDMA Rx NULL List */
82#define ETH_S_BRxNO 0x00004 /* BDMA Rx Not Owner */
83#define ETH_S_BRxMSO 0x00008 /* BDMA Rx Maximum Size Over */
84#define ETH_S_BRxEmpty 0x00010 /* BDMA Rx Buffer Empty */
85#define ETH_S_BRxSEarly 0x00020 /* Early Notify */
86#define ETH_S_BRxFRF 0x00080 /* One more frame data in BDMA receive buffer */
87#define ETH_S_BTxCCP 0x10000 /* BDMA Tx Complete to send Control Packet */
88#define ETH_S_BTxNL 0x20000 /* BDMA Tx Null List */
89#define ETH_S_BTxNO 0x40000 /* BDMA Tx Not Owner */
90#define ETH_S_BTxEmpty 0x100000 /* BDMA Tx Buffer Empty */
91
92/* MAC Control Register */
93#define ETH_HaltReg 0x0001 /* stop transmission and reception */
94 /* after completion of any current packets */
95#define ETH_HaltImm 0x0002 /* Stop transmission and reception immediately */
96#define ETH_SwReset 0x0004 /* reset all Ethernet controller state machines */
97 /* and FIFOs */
98#define ETH_FullDup 0x0008 /* allow transmission to begin while reception */
99 /* is occurring */
100#define ETH_MACLoop 0x0010 /* MAC loopback */
101#define ETH_ConnM00 0x0000 /* Automatic-default */
102#define ETH_ConnM01 0x0020 /* Force 10Mbits endec */
103#define ETH_ConnM10 0x0040 /* Force MII (rate determined by MII clock */
104#define ETH_MIIOFF 0x0040 /* Force MII (rate determined by MII clock */
105#define ETH_Loop10 0x0080 /* Loop 10Mbps */
106#define ETH_MissRoll 0x0400 /* Missed error counter rolled over */
107#define ETH_MDCOFF 0x1000 /* MII Station Management Clock Off */
108#define ETH_EnMissRoll 0x2000 /* Interrupt when missed error counter rolls */
109 /* over */
110#define ETH_Link10 0x8000 /* Link status 10Mbps */
111
112/* CAM control register(CAMCON) */
113#define ETH_StationAcc 0x0001 /* Accept any packet with a unicast station */
114 /* address */
115#define ETH_GroupAcc 0x0002 /* Accept any packet with multicast-group */
116 /* station address */
117#define ETH_BroadAcc 0x0004 /* Accept any packet with a broadcast station */
118 /* address */
119#define ETH_NegCAM 0x0008 /* 0: Accept packets CAM recognizes, */
120 /* reject others */
121 /* 1: reject packets CAM recognizes, */
122 /* accept others */
123#define ETH_CompEn 0x0010 /* Compare Enable mode */
124
125/* Transmit Control Register(MACTXCON) */
126#define ETH_TxEn 0x0001 /* transmit Enable */
127#define ETH_TxHalt 0x0002 /* Transmit Halt Request */
128#define ETH_NoPad 0x0004 /* suppress Padding */
129#define ETH_NoCRC 0x0008 /* Suppress CRC */
130#define ETH_FBack 0x0010 /* Fast Back-off */
131#define ETH_NoDef 0x0020 /* Disable the defer counter */
132#define ETH_SdPause 0x0040 /* Send Pause */
133#define ETH_MII10En 0x0080 /* MII 10Mbps mode enable */
134#define ETH_EnUnder 0x0100 /* Enable Underrun */
135#define ETH_EnDefer 0x0200 /* Enable Deferral */
136#define ETH_EnNCarr 0x0400 /* Enable No Carrier */
137#define ETH_EnExColl 0x0800 /* interrupt if 16 collision occur */
138 /* in the same packet */
139#define ETH_EnLateColl 0x1000 /* interrupt if collision occurs after */
140 /* 512 bit times(64 bytes times) */
141#define ETH_EnTxPar 0x2000 /* interrupt if the MAC transmit FIFO */
142 /* has a parity error */
143#define ETH_EnComp 0x4000 /* interrupt when the MAC transmits or */
144 /* discards one packet */
145
146/* Transmit Status Register(MACTXSTAT) */
147#define ETH_ExColl 0x0010 /* Excessive collision */
148#define ETH_TxDeffered 0x0020 /* set if 16 collisions occur for same packet */
149#define ETH_Paused 0x0040 /* packet waited because of pause during */
150 /* transmission */
151#define ETH_IntTx 0x0080 /* set if transmission of packet causes an */
152 /* interrupt condiftion */
153#define ETH_Under 0x0100 /* MAC transmit FIFO becomes empty during */
154 /* transmission */
155#define ETH_Defer 0x0200 /* MAC defers for MAC deferral */
156#define ETH_NCarr 0x0400 /* No carrier sense detected during the */
157 /* transmission of a packet */
158#define ETH_SQE 0x0800 /* Signal Quality Error */
159#define ETH_LateColl 0x1000 /* a collision occures after 512 bit times */
160#define ETH_TxPar 0x2000 /* MAC transmit FIFO has detected a parity error */
161#define ETH_Comp 0x4000 /* MAC transmit or discards one packet */
162#define ETH_TxHalted 0x8000 /* Transmission was halted by clearing */
163 /* TxEn or Halt immedite */
164
165/* Receive Control Register (MACRXCON) */
166#define ETH_RxEn 0x0001
167#define ETH_RxHalt 0x0002
168#define ETH_LongEn 0x0004
169#define ETH_ShortEn 0x0008
170#define ETH_StripCRC 0x0010
171#define ETH_PassCtl 0x0020
172#define ETH_IgnoreCRC 0x0040
173#define ETH_EnAlign 0x0100
174#define ETH_EnCRCErr 0x0200
175#define ETH_EnOver 0x0400
176#define ETH_EnLongErr 0x0800
177#define ETH_EnRxPar 0x2000
178#define ETH_EnGood 0x4000
179
180/* Receive Status Register(MACRXSTAT) */
181#define ETH_MCtlRecd 0x0020
182#define ETH_MIntRx 0x0040
183#define ETH_MRx10Stat 0x0080
184#define ETH_MAllignErr 0x0100
185#define ETH_MCRCErr 0x0200
186#define ETH_MOverflow 0x0400
187#define ETH_MLongErr 0x0800
188#define ETH_MRxPar 0x2000
189#define ETH_MRxGood 0x4000
190#define ETH_MRxHalted 0x8000
191
192/* type of ethernet packets */
193#define ETH_TYPE_ARP (0x0806)
194#define ETH_TYPE_IP (0x0800)
195
196#define ETH_HDR_SIZE (14)
197
198/* bit field for frame data pointer word */
199typedef struct __BF_FrameDataPtr {
200 u32 dataPtr:31;
201 u32 owner: 1;
202} BF_FrameDataPtr;
203
204typedef union _FrameDataPtr {
205 u32 ui;
206 BF_FrameDataPtr bf;
207} FrameDataPtr;
208
209typedef struct __BF_TX_Options {
210 u32 no_padding: 1;
211 u32 no_crc: 1;
212 u32 macTxIrqEnbl: 1;
213 u32 littleEndian: 1;
214 u32 frameDataDir: 1;
215 u32 widgetAlign: 2;
216 u32 reserved:25;
217} BF_TX_Options;
218
219typedef union _TX_Options {
220 u32 ui;
221 BF_TX_Options bf;
222} TX_Options;
223
224typedef struct __BF_RX_Status {
225 u32 len:16; /* frame length */
226 u32 reserved1: 3;
227 u32 overMax: 1;
228 u32 reserved2: 1;
229 u32 ctrlRcv: 1;
230 u32 intRx: 1;
231 u32 rx10stat: 1;
232 u32 alignErr: 1;
233 u32 crcErr: 1;
234 u32 overFlow: 1;
235 u32 longErr: 1;
236 u32 reserved3: 1;
237 u32 parityErr: 1;
238 u32 good: 1;
239 u32 halted: 1;
240} BF_RX_Status;
241
242typedef union _RX_Status {
243 u32 ui;
244 BF_RX_Status bf;
245} RX_Status;
246
247typedef struct __BF_TX_Status {
248 u32 len:16; /* frame length */
249 u32 txCollCnt: 4;
250 u32 exColl: 1;
251 u32 txDefer: 1;
252 u32 paused: 1;
253 u32 intTx: 1;
254 u32 underRun: 1;
255 u32 defer: 1;
256 u32 noCarrier: 1;
257 u32 SQErr: 1;
258 u32 lateColl: 1;
259 u32 parityErr: 1;
260 u32 complete: 1;
261 u32 halted: 1;
262} BF_TX_Status;
263
264typedef union _TX_Status {
265 u32 ui;
266 BF_TX_Status bf;
267} TX_Status;
268
269/* TX descriptor structure */
270typedef struct __TX_FrameDescriptor {
271 volatile FrameDataPtr m_frameDataPtr;
272 TX_Options m_opt;
273 volatile TX_Status m_status;
274 struct __TX_FrameDescriptor *m_nextFD;
275} TX_FrameDescriptor;
276
277/* RX descriptor structure */
278typedef struct __RX_FrameDescriptor {
279 volatile FrameDataPtr m_frameDataPtr;
280 u32 m_reserved;
281 volatile RX_Status m_status;
282 struct __RX_FrameDescriptor *m_nextFD;
283} RX_FrameDescriptor;
284
285/* MAC Frame Structure */
286typedef struct __MACFrame {
287 u8 m_dstAddr[6] __packed;
288 u8 m_srcAddr[6] __packed;
289 u16 m_lengthOrType __packed;
290 u8 m_payload[1506] __packed;
291} MACFrame;
292
293/* Ethernet Control block */
294typedef struct __ETH {
295 TX_FrameDescriptor *m_curTX_FD; /* pointer to current TX frame descriptor */
296 TX_FrameDescriptor *m_baseTX_FD; /* pointer to base TX frame descriptor */
297 RX_FrameDescriptor *m_curRX_FD; /* pointer to current RX frame descriptor */
298 RX_FrameDescriptor *m_baseRX_FD; /* pointer to base RX frame descriptor */
299 u8 *m_mac; /* pointer to our MAC address */
300} ETH;
301
302#endif