blob: 9ba4096e81adef3b820203c743fa0df729e39c7f [file] [log] [blame]
Michal Simek89c53892008-03-28 12:41:56 +01001/******************************************************************************
2 *
3 * XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
4 * AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
5 * SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
6 * OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
7 * APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
8 * THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
9 * AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
10 * FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
11 * WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
12 * IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
13 * REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
14 * INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
15 * FOR A PARTICULAR PURPOSE.
16 *
17 * (C) Copyright 2007-2008 Michal Simek
18 * Michal SIMEK <monstr@monstr.eu>
19 *
20 * (c) Copyright 2003 Xilinx Inc.
21 * All rights reserved.
22 *
23 ******************************************************************************/
24
25#include <common.h>
26#include <net.h>
27#include <config.h>
28#include <asm/io.h>
29
30#undef DEBUG
31
32#define ENET_MAX_MTU PKTSIZE
33#define ENET_MAX_MTU_ALIGNED PKTSIZE_ALIGN
34#define ENET_ADDR_LENGTH 6
35
36/* EmacLite constants */
37#define XEL_BUFFER_OFFSET 0x0800 /* Next buffer's offset */
38#define XEL_TPLR_OFFSET 0x07F4 /* Tx packet length */
39#define XEL_TSR_OFFSET 0x07FC /* Tx status */
40#define XEL_RSR_OFFSET 0x17FC /* Rx status */
41#define XEL_RXBUFF_OFFSET 0x1000 /* Receive Buffer */
42
43/* Xmit complete */
44#define XEL_TSR_XMIT_BUSY_MASK 0x00000001UL
45/* Xmit interrupt enable bit */
46#define XEL_TSR_XMIT_IE_MASK 0x00000008UL
47/* Buffer is active, SW bit only */
48#define XEL_TSR_XMIT_ACTIVE_MASK 0x80000000UL
49/* Program the MAC address */
50#define XEL_TSR_PROGRAM_MASK 0x00000002UL
51/* define for programming the MAC address into the EMAC Lite */
52#define XEL_TSR_PROG_MAC_ADDR (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_PROGRAM_MASK)
53
54/* Transmit packet length upper byte */
55#define XEL_TPLR_LENGTH_MASK_HI 0x0000FF00UL
56/* Transmit packet length lower byte */
57#define XEL_TPLR_LENGTH_MASK_LO 0x000000FFUL
58
59/* Recv complete */
60#define XEL_RSR_RECV_DONE_MASK 0x00000001UL
61/* Recv interrupt enable bit */
62#define XEL_RSR_RECV_IE_MASK 0x00000008UL
63
64typedef struct {
65 unsigned int baseaddress; /* Base address for device (IPIF) */
66 unsigned int nexttxbuffertouse; /* Next TX buffer to write to */
67 unsigned int nextrxbuffertouse; /* Next RX buffer to read from */
68 unsigned char deviceid; /* Unique ID of device - for future */
69} xemaclite;
70
71static xemaclite emaclite;
72
73static char etherrxbuff[PKTSIZE_ALIGN/4]; /* Receive buffer */
74
75/* hardcoded MAC address for the Xilinx EMAC Core when env is nowhere*/
76#ifdef CFG_ENV_IS_NOWHERE
77static u8 emacaddr[ENET_ADDR_LENGTH] = { 0x00, 0x0a, 0x35, 0x00, 0x22, 0x01 };
78#else
79static u8 emacaddr[ENET_ADDR_LENGTH];
80#endif
81
82void xemaclite_alignedread (u32 * srcptr, void *destptr, unsigned bytecount)
83{
84 unsigned int i;
85 u32 alignbuffer;
86 u32 *to32ptr;
87 u32 *from32ptr;
88 u8 *to8ptr;
89 u8 *from8ptr;
90
91 from32ptr = (u32 *) srcptr;
92
93 /* Word aligned buffer, no correction needed. */
94 to32ptr = (u32 *) destptr;
95 while (bytecount > 3) {
96 *to32ptr++ = *from32ptr++;
97 bytecount -= 4;
98 }
99 to8ptr = (u8 *) to32ptr;
100
101 alignbuffer = *from32ptr++;
102 from8ptr = (u8 *) & alignbuffer;
103
104 for (i = 0; i < bytecount; i++) {
105 *to8ptr++ = *from8ptr++;
106 }
107}
108
109void xemaclite_alignedwrite (void *srcptr, u32 destptr, unsigned bytecount)
110{
111 unsigned i;
112 u32 alignbuffer;
113 u32 *to32ptr = (u32 *) destptr;
114 u32 *from32ptr;
115 u8 *to8ptr;
116 u8 *from8ptr;
117
118 from32ptr = (u32 *) srcptr;
119 while (bytecount > 3) {
120
121 *to32ptr++ = *from32ptr++;
122 bytecount -= 4;
123 }
124
125 alignbuffer = 0;
126 to8ptr = (u8 *) & alignbuffer;
127 from8ptr = (u8 *) from32ptr;
128
129 for (i = 0; i < bytecount; i++) {
130 *to8ptr++ = *from8ptr++;
131 }
132
133 *to32ptr++ = alignbuffer;
134}
135
136void eth_halt (void)
137{
138 debug ("eth_halt\n");
139}
140
141int eth_init (bd_t * bis)
142{
143 debug ("EmacLite Initialization Started\n");
144 memset (&emaclite, 0, sizeof (xemaclite));
145 emaclite.baseaddress = XILINX_EMACLITE_BASEADDR;
146
147 if (!getenv("ethaddr")) {
148 memcpy(bis->bi_enetaddr, emacaddr, ENET_ADDR_LENGTH);
149 }
150
151/*
152 * TX - TX_PING & TX_PONG initialization
153 */
154 /* Restart PING TX */
155 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET, 0);
156 /* Copy MAC address */
157 xemaclite_alignedwrite (bis->bi_enetaddr,
158 emaclite.baseaddress, ENET_ADDR_LENGTH);
159 /* Set the length */
160 out_be32 (emaclite.baseaddress + XEL_TPLR_OFFSET, ENET_ADDR_LENGTH);
161 /* Update the MAC address in the EMAC Lite */
162 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET, XEL_TSR_PROG_MAC_ADDR);
163 /* Wait for EMAC Lite to finish with the MAC address update */
164 while ((in_be32 (emaclite.baseaddress + XEL_TSR_OFFSET) &
165 XEL_TSR_PROG_MAC_ADDR) != 0) ;
166
167#ifdef CONFIG_XILINX_EMACLITE_TX_PING_PONG
168 /* The same operation with PONG TX */
169 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET + XEL_BUFFER_OFFSET, 0);
170 xemaclite_alignedwrite (bis->bi_enetaddr, emaclite.baseaddress +
171 XEL_BUFFER_OFFSET, ENET_ADDR_LENGTH);
172 out_be32 (emaclite.baseaddress + XEL_TPLR_OFFSET, ENET_ADDR_LENGTH);
173 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET + XEL_BUFFER_OFFSET,
174 XEL_TSR_PROG_MAC_ADDR);
175 while ((in_be32 (emaclite.baseaddress + XEL_TSR_OFFSET +
176 XEL_BUFFER_OFFSET) & XEL_TSR_PROG_MAC_ADDR) != 0) ;
177#endif
178
179/*
180 * RX - RX_PING & RX_PONG initialization
181 */
182 /* Write out the value to flush the RX buffer */
183 out_be32 (emaclite.baseaddress + XEL_RSR_OFFSET, XEL_RSR_RECV_IE_MASK);
184#ifdef CONFIG_XILINX_EMACLITE_RX_PING_PONG
185 out_be32 (emaclite.baseaddress + XEL_RSR_OFFSET + XEL_BUFFER_OFFSET,
186 XEL_RSR_RECV_IE_MASK);
187#endif
188
189 debug ("EmacLite Initialization complete\n");
190 return 0;
191}
192
193int xemaclite_txbufferavailable (xemaclite * instanceptr)
194{
195 u32 reg;
196 u32 txpingbusy;
197 u32 txpongbusy;
198 /*
199 * Read the other buffer register
200 * and determine if the other buffer is available
201 */
202 reg = in_be32 (instanceptr->baseaddress +
203 instanceptr->nexttxbuffertouse + 0);
204 txpingbusy = ((reg & XEL_TSR_XMIT_BUSY_MASK) ==
205 XEL_TSR_XMIT_BUSY_MASK);
206
207 reg = in_be32 (instanceptr->baseaddress +
208 (instanceptr->nexttxbuffertouse ^ XEL_TSR_OFFSET) + 0);
209 txpongbusy = ((reg & XEL_TSR_XMIT_BUSY_MASK) ==
210 XEL_TSR_XMIT_BUSY_MASK);
211
212 return (!(txpingbusy && txpongbusy));
213}
214
215int eth_send (volatile void *ptr, int len) {
216
217 unsigned int reg;
218 unsigned int baseaddress;
219
220 unsigned maxtry = 1000;
221
222 if (len > ENET_MAX_MTU)
223 len = ENET_MAX_MTU;
224
225 while (!xemaclite_txbufferavailable (&emaclite) && maxtry) {
226 udelay (10);
227 maxtry--;
228 }
229
230 if (!maxtry) {
231 printf ("Error: Timeout waiting for ethernet TX buffer\n");
232 /* Restart PING TX */
233 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET, 0);
234#ifdef CONFIG_XILINX_EMACLITE_TX_PING_PONG
235 out_be32 (emaclite.baseaddress + XEL_TSR_OFFSET +
236 XEL_BUFFER_OFFSET, 0);
237#endif
238 return 0;
239 }
240
241 /* Determine the expected TX buffer address */
242 baseaddress = (emaclite.baseaddress + emaclite.nexttxbuffertouse);
243
244 /* Determine if the expected buffer address is empty */
245 reg = in_be32 (baseaddress + XEL_TSR_OFFSET);
246 if (((reg & XEL_TSR_XMIT_BUSY_MASK) == 0)
247 && ((in_be32 ((baseaddress) + XEL_TSR_OFFSET)
248 & XEL_TSR_XMIT_ACTIVE_MASK) == 0)) {
249
250#ifdef CONFIG_XILINX_EMACLITE_TX_PING_PONG
251 emaclite.nexttxbuffertouse ^= XEL_BUFFER_OFFSET;
252#endif
253 debug ("Send packet from 0x%x\n", baseaddress);
254 /* Write the frame to the buffer */
255 xemaclite_alignedwrite ((void *) ptr, baseaddress, len);
256 out_be32 (baseaddress + XEL_TPLR_OFFSET,(len &
257 (XEL_TPLR_LENGTH_MASK_HI | XEL_TPLR_LENGTH_MASK_LO)));
258 reg = in_be32 (baseaddress + XEL_TSR_OFFSET);
259 reg |= XEL_TSR_XMIT_BUSY_MASK;
260 if ((reg & XEL_TSR_XMIT_IE_MASK) != 0) {
261 reg |= XEL_TSR_XMIT_ACTIVE_MASK;
262 }
263 out_be32 (baseaddress + XEL_TSR_OFFSET, reg);
264 return 1;
265 }
266#ifdef CONFIG_XILINX_EMACLITE_TX_PING_PONG
267 /* Switch to second buffer */
268 baseaddress ^= XEL_BUFFER_OFFSET;
269 /* Determine if the expected buffer address is empty */
270 reg = in_be32 (baseaddress + XEL_TSR_OFFSET);
271 if (((reg & XEL_TSR_XMIT_BUSY_MASK) == 0)
272 && ((in_be32 ((baseaddress) + XEL_TSR_OFFSET)
273 & XEL_TSR_XMIT_ACTIVE_MASK) == 0)) {
274 debug ("Send packet from 0x%x\n", baseaddress);
275 /* Write the frame to the buffer */
276 xemaclite_alignedwrite ((void *) ptr, baseaddress, len);
277 out_be32 (baseaddress + XEL_TPLR_OFFSET,(len &
278 (XEL_TPLR_LENGTH_MASK_HI | XEL_TPLR_LENGTH_MASK_LO)));
279 reg = in_be32 (baseaddress + XEL_TSR_OFFSET);
280 reg |= XEL_TSR_XMIT_BUSY_MASK;
281 if ((reg & XEL_TSR_XMIT_IE_MASK) != 0) {
282 reg |= XEL_TSR_XMIT_ACTIVE_MASK;
283 }
284 out_be32 (baseaddress + XEL_TSR_OFFSET, reg);
285 return 1;
286 }
287#endif
288 puts ("Error while sending frame\n");
289 return 0;
290}
291
292int eth_rx (void)
293{
294 unsigned int length;
295 unsigned int reg;
296 unsigned int baseaddress;
297
298 baseaddress = emaclite.baseaddress + emaclite.nextrxbuffertouse;
299 reg = in_be32 (baseaddress + XEL_RSR_OFFSET);
300 debug ("Testing data at address 0x%x\n", baseaddress);
301 if ((reg & XEL_RSR_RECV_DONE_MASK) == XEL_RSR_RECV_DONE_MASK) {
302#ifdef CONFIG_XILINX_EMACLITE_RX_PING_PONG
303 emaclite.nextrxbuffertouse ^= XEL_BUFFER_OFFSET;
304#endif
305 } else {
306#ifndef CONFIG_XILINX_EMACLITE_RX_PING_PONG
307 debug ("No data was available - address 0x%x\n", baseaddress);
308 return 0;
309#else
310 baseaddress ^= XEL_BUFFER_OFFSET;
311 reg = in_be32 (baseaddress + XEL_RSR_OFFSET);
312 if ((reg & XEL_RSR_RECV_DONE_MASK) !=
313 XEL_RSR_RECV_DONE_MASK) {
314 debug ("No data was available - address 0x%x\n",
315 baseaddress);
316 return 0;
317 }
318#endif
319 }
320 /* Get the length of the frame that arrived */
321 switch(((in_be32 (baseaddress + XEL_RXBUFF_OFFSET + 0xC)) &
322 0xFFFF0000 ) >> 16) {
323 case 0x806:
324 length = 42 + 20; /* FIXME size of ARP */
325 debug ("ARP Packet\n");
326 break;
327 case 0x800:
328 length = 14 + 14 +
329 (((in_be32 (baseaddress + XEL_RXBUFF_OFFSET + 0x10)) &
330 0xFFFF0000) >> 16); /* FIXME size of IP packet */
331 debug ("IP Packet\n");
332 break;
333 default:
334 debug ("Other Packet\n");
335 length = ENET_MAX_MTU;
336 break;
337 }
338
339 xemaclite_alignedread ((u32 *) (baseaddress + XEL_RXBUFF_OFFSET),
340 etherrxbuff, length);
341
342 /* Acknowledge the frame */
343 reg = in_be32 (baseaddress + XEL_RSR_OFFSET);
344 reg &= ~XEL_RSR_RECV_DONE_MASK;
345 out_be32 (baseaddress + XEL_RSR_OFFSET, reg);
346
347 debug ("Packet receive from 0x%x, length %dB\n", baseaddress, length);
348 NetReceive ((uchar *) etherrxbuff, length);
349 return 1;
350
351}