]>
Commit | Line | Data |
---|---|---|
702c85b0 NI |
1 | /* |
2 | Ported to U-Boot by Christian Pellegrin <chri@ascensit.com> | |
3 | ||
4 | Based on sources from the Linux kernel (pcnet_cs.c, 8390.h) and | |
5 | eCOS(if_dp83902a.c, if_dp83902a.h). Both of these 2 wonderful world | |
6 | are GPL, so this is, of course, GPL. | |
7 | ||
8 | ========================================================================== | |
9 | ||
10 | dev/if_dp83902a.c | |
11 | ||
12 | Ethernet device driver for NS DP83902a ethernet controller | |
13 | ||
14 | ========================================================================== | |
15 | ####ECOSGPLCOPYRIGHTBEGIN#### | |
16 | ------------------------------------------- | |
17 | This file is part of eCos, the Embedded Configurable Operating System. | |
18 | Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. | |
19 | ||
20 | eCos is free software; you can redistribute it and/or modify it under | |
21 | the terms of the GNU General Public License as published by the Free | |
22 | Software Foundation; either version 2 or (at your option) any later version. | |
23 | ||
24 | eCos is distributed in the hope that it will be useful, but WITHOUT ANY | |
25 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
26 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
27 | for more details. | |
28 | ||
29 | You should have received a copy of the GNU General Public License along | |
30 | with eCos; if not, write to the Free Software Foundation, Inc., | |
31 | 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
32 | ||
33 | As a special exception, if other files instantiate templates or use macros | |
34 | or inline functions from this file, or you compile this file and link it | |
35 | with other works to produce a work based on this file, this file does not | |
36 | by itself cause the resulting work to be covered by the GNU General Public | |
37 | License. However the source code for this file must still be made available | |
38 | in accordance with section (3) of the GNU General Public License. | |
39 | ||
40 | This exception does not invalidate any other reasons why a work based on | |
41 | this file might be covered by the GNU General Public License. | |
42 | ||
43 | Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. | |
44 | at http://sources.redhat.com/ecos/ecos-license/ | |
45 | ------------------------------------------- | |
46 | ####ECOSGPLCOPYRIGHTEND#### | |
47 | ####BSDCOPYRIGHTBEGIN#### | |
48 | ||
49 | ------------------------------------------- | |
50 | ||
51 | Portions of this software may have been derived from OpenBSD or other sources, | |
52 | and are covered by the appropriate copyright disclaimers included herein. | |
53 | ||
54 | ------------------------------------------- | |
55 | ||
56 | ####BSDCOPYRIGHTEND#### | |
57 | ========================================================================== | |
58 | #####DESCRIPTIONBEGIN#### | |
59 | ||
60 | Author(s): gthomas | |
61 | Contributors: gthomas, jskov, rsandifo | |
62 | Date: 2001-06-13 | |
63 | Purpose: | |
64 | Description: | |
65 | ||
66 | FIXME: Will fail if pinged with large packets (1520 bytes) | |
67 | Add promisc config | |
68 | Add SNMP | |
69 | ||
70 | ####DESCRIPTIONEND#### | |
71 | ||
72 | ========================================================================== | |
73 | */ | |
74 | ||
75 | #include <common.h> | |
76 | #include <command.h> | |
9fb625ce | 77 | #include <env.h> |
702c85b0 NI |
78 | #include <net.h> |
79 | #include <malloc.h> | |
4eaf172e | 80 | #include <linux/compiler.h> |
702c85b0 | 81 | |
702c85b0 NI |
82 | /* forward definition of function used for the uboot interface */ |
83 | void uboot_push_packet_len(int len); | |
84 | void uboot_push_tx_done(int key, int val); | |
85 | ||
86 | /* NE2000 base header file */ | |
87 | #include "ne2000_base.h" | |
88 | ||
89 | #if defined(CONFIG_DRIVER_AX88796L) | |
90 | /* AX88796L support */ | |
91 | #include "ax88796.h" | |
92 | #else | |
93 | /* Basic NE2000 chip support */ | |
94 | #include "ne2000.h" | |
95 | #endif | |
96 | ||
97 | static dp83902a_priv_data_t nic; /* just one instance of the card supported */ | |
98 | ||
d0201692 BK |
99 | /** |
100 | * This function reads the MAC address from the serial EEPROM, | |
101 | * used if PROM read fails. Does nothing for ax88796 chips (sh boards) | |
102 | */ | |
702c85b0 | 103 | static bool |
d0201692 | 104 | dp83902a_init(unsigned char *enetaddr) |
702c85b0 NI |
105 | { |
106 | dp83902a_priv_data_t *dp = &nic; | |
107 | u8* base; | |
108 | #if defined(NE2000_BASIC_INIT) | |
109 | int i; | |
110 | #endif | |
111 | ||
112 | DEBUG_FUNCTION(); | |
113 | ||
114 | base = dp->base; | |
115 | if (!base) | |
116 | return false; /* No device found */ | |
117 | ||
118 | DEBUG_LINE(); | |
119 | ||
120 | #if defined(NE2000_BASIC_INIT) | |
121 | /* AX88796L doesn't need */ | |
122 | /* Prepare ESA */ | |
123 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1); /* Select page 1 */ | |
124 | /* Use the address from the serial EEPROM */ | |
125 | for (i = 0; i < 6; i++) | |
126 | DP_IN(base, DP_P1_PAR0+i, dp->esa[i]); | |
127 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0); /* Select page 0 */ | |
128 | ||
129 | printf("NE2000 - %s ESA: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
130 | "eeprom", | |
131 | dp->esa[0], | |
132 | dp->esa[1], | |
133 | dp->esa[2], | |
134 | dp->esa[3], | |
135 | dp->esa[4], | |
136 | dp->esa[5] ); | |
137 | ||
d0201692 | 138 | memcpy(enetaddr, dp->esa, 6); /* Use MAC from serial EEPROM */ |
702c85b0 NI |
139 | #endif /* NE2000_BASIC_INIT */ |
140 | return true; | |
141 | } | |
142 | ||
143 | static void | |
144 | dp83902a_stop(void) | |
145 | { | |
146 | dp83902a_priv_data_t *dp = &nic; | |
147 | u8 *base = dp->base; | |
148 | ||
149 | DEBUG_FUNCTION(); | |
150 | ||
151 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */ | |
152 | DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */ | |
153 | DP_OUT(base, DP_IMR, 0x00); /* Disable all interrupts */ | |
154 | ||
155 | dp->running = false; | |
156 | } | |
157 | ||
158 | /* | |
159 | * This function is called to "start up" the interface. It may be called | |
160 | * multiple times, even when the hardware is already running. It will be | |
161 | * called whenever something "hardware oriented" changes and should leave | |
162 | * the hardware ready to send/receive packets. | |
163 | */ | |
164 | static void | |
165 | dp83902a_start(u8 * enaddr) | |
166 | { | |
167 | dp83902a_priv_data_t *dp = &nic; | |
168 | u8 *base = dp->base; | |
169 | int i; | |
170 | ||
d0201692 BK |
171 | debug("The MAC is %pM\n", enaddr); |
172 | ||
702c85b0 NI |
173 | DEBUG_FUNCTION(); |
174 | ||
175 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */ | |
176 | DP_OUT(base, DP_DCR, DP_DCR_INIT); | |
177 | DP_OUT(base, DP_RBCH, 0); /* Remote byte count */ | |
178 | DP_OUT(base, DP_RBCL, 0); | |
179 | DP_OUT(base, DP_RCR, DP_RCR_MON); /* Accept no packets */ | |
180 | DP_OUT(base, DP_TCR, DP_TCR_LOCAL); /* Transmitter [virtually] off */ | |
181 | DP_OUT(base, DP_TPSR, dp->tx_buf1); /* Transmitter start page */ | |
182 | dp->tx1 = dp->tx2 = 0; | |
183 | dp->tx_next = dp->tx_buf1; | |
184 | dp->tx_started = false; | |
185 | dp->running = true; | |
186 | DP_OUT(base, DP_PSTART, dp->rx_buf_start); /* Receive ring start page */ | |
187 | DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); /* Receive ring boundary */ | |
188 | DP_OUT(base, DP_PSTOP, dp->rx_buf_end); /* Receive ring end page */ | |
189 | dp->rx_next = dp->rx_buf_start - 1; | |
190 | dp->running = true; | |
191 | DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */ | |
192 | DP_OUT(base, DP_IMR, DP_IMR_All); /* Enable all interrupts */ | |
193 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1 | DP_CR_STOP); /* Select page 1 */ | |
194 | DP_OUT(base, DP_P1_CURP, dp->rx_buf_start); /* Current page - next free page for Rx */ | |
195 | dp->running = true; | |
196 | for (i = 0; i < ETHER_ADDR_LEN; i++) { | |
197 | /* FIXME */ | |
198 | /*((vu_short*)( base + ((DP_P1_PAR0 + i) * 2) + | |
199 | * 0x1400)) = enaddr[i];*/ | |
200 | DP_OUT(base, DP_P1_PAR0+i, enaddr[i]); | |
201 | } | |
202 | /* Enable and start device */ | |
203 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); | |
204 | DP_OUT(base, DP_TCR, DP_TCR_NORMAL); /* Normal transmit operations */ | |
205 | DP_OUT(base, DP_RCR, DP_RCR_AB); /* Accept broadcast, no errors, no multicast */ | |
206 | dp->running = true; | |
207 | } | |
208 | ||
209 | /* | |
210 | * This routine is called to start the transmitter. It is split out from the | |
211 | * data handling routine so it may be called either when data becomes first | |
212 | * available or when an Tx interrupt occurs | |
213 | */ | |
214 | ||
215 | static void | |
216 | dp83902a_start_xmit(int start_page, int len) | |
217 | { | |
218 | dp83902a_priv_data_t *dp = (dp83902a_priv_data_t *) &nic; | |
219 | u8 *base = dp->base; | |
220 | ||
221 | DEBUG_FUNCTION(); | |
222 | ||
223 | #if DEBUG & 1 | |
224 | printf("Tx pkt %d len %d\n", start_page, len); | |
225 | if (dp->tx_started) | |
226 | printf("TX already started?!?\n"); | |
227 | #endif | |
228 | ||
229 | DP_OUT(base, DP_ISR, (DP_ISR_TxP | DP_ISR_TxE)); | |
230 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); | |
231 | DP_OUT(base, DP_TBCL, len & 0xFF); | |
232 | DP_OUT(base, DP_TBCH, len >> 8); | |
233 | DP_OUT(base, DP_TPSR, start_page); | |
234 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START); | |
235 | ||
236 | dp->tx_started = true; | |
237 | } | |
238 | ||
239 | /* | |
240 | * This routine is called to send data to the hardware. It is known a-priori | |
241 | * that there is free buffer space (dp->tx_next). | |
242 | */ | |
243 | static void | |
244 | dp83902a_send(u8 *data, int total_len, u32 key) | |
245 | { | |
246 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
247 | u8 *base = dp->base; | |
248 | int len, start_page, pkt_len, i, isr; | |
249 | #if DEBUG & 4 | |
250 | int dx; | |
251 | #endif | |
252 | ||
253 | DEBUG_FUNCTION(); | |
254 | ||
255 | len = pkt_len = total_len; | |
256 | if (pkt_len < IEEE_8023_MIN_FRAME) | |
257 | pkt_len = IEEE_8023_MIN_FRAME; | |
258 | ||
259 | start_page = dp->tx_next; | |
260 | if (dp->tx_next == dp->tx_buf1) { | |
261 | dp->tx1 = start_page; | |
262 | dp->tx1_len = pkt_len; | |
263 | dp->tx1_key = key; | |
264 | dp->tx_next = dp->tx_buf2; | |
265 | } else { | |
266 | dp->tx2 = start_page; | |
267 | dp->tx2_len = pkt_len; | |
268 | dp->tx2_key = key; | |
269 | dp->tx_next = dp->tx_buf1; | |
270 | } | |
271 | ||
272 | #if DEBUG & 5 | |
273 | printf("TX prep page %d len %d\n", start_page, pkt_len); | |
274 | #endif | |
275 | ||
276 | DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ | |
277 | { | |
278 | /* | |
279 | * Dummy read. The manual sez something slightly different, | |
280 | * but the code is extended a bit to do what Hitachi's monitor | |
281 | * does (i.e., also read data). | |
282 | */ | |
283 | ||
4eaf172e | 284 | __maybe_unused u16 tmp; |
702c85b0 NI |
285 | int len = 1; |
286 | ||
287 | DP_OUT(base, DP_RSAL, 0x100 - len); | |
288 | DP_OUT(base, DP_RSAH, (start_page - 1) & 0xff); | |
289 | DP_OUT(base, DP_RBCL, len); | |
290 | DP_OUT(base, DP_RBCH, 0); | |
291 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_RDMA | DP_CR_START); | |
292 | DP_IN_DATA(dp->data, tmp); | |
293 | } | |
294 | ||
295 | #ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA | |
296 | /* | |
297 | * Stall for a bit before continuing to work around random data | |
298 | * corruption problems on some platforms. | |
299 | */ | |
300 | CYGACC_CALL_IF_DELAY_US(1); | |
301 | #endif | |
302 | ||
303 | /* Send data to device buffer(s) */ | |
304 | DP_OUT(base, DP_RSAL, 0); | |
305 | DP_OUT(base, DP_RSAH, start_page); | |
306 | DP_OUT(base, DP_RBCL, pkt_len & 0xFF); | |
307 | DP_OUT(base, DP_RBCH, pkt_len >> 8); | |
308 | DP_OUT(base, DP_CR, DP_CR_WDMA | DP_CR_START); | |
309 | ||
310 | /* Put data into buffer */ | |
311 | #if DEBUG & 4 | |
312 | printf(" sg buf %08lx len %08x\n ", (u32)data, len); | |
313 | dx = 0; | |
314 | #endif | |
315 | while (len > 0) { | |
316 | #if DEBUG & 4 | |
317 | printf(" %02x", *data); | |
318 | if (0 == (++dx % 16)) printf("\n "); | |
319 | #endif | |
320 | ||
321 | DP_OUT_DATA(dp->data, *data++); | |
322 | len--; | |
323 | } | |
324 | #if DEBUG & 4 | |
325 | printf("\n"); | |
326 | #endif | |
327 | if (total_len < pkt_len) { | |
328 | #if DEBUG & 4 | |
329 | printf(" + %d bytes of padding\n", pkt_len - total_len); | |
330 | #endif | |
331 | /* Padding to 802.3 length was required */ | |
332 | for (i = total_len; i < pkt_len;) { | |
333 | i++; | |
334 | DP_OUT_DATA(dp->data, 0); | |
335 | } | |
336 | } | |
337 | ||
338 | #ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA | |
339 | /* | |
340 | * After last data write, delay for a bit before accessing the | |
341 | * device again, or we may get random data corruption in the last | |
342 | * datum (on some platforms). | |
343 | */ | |
344 | CYGACC_CALL_IF_DELAY_US(1); | |
345 | #endif | |
346 | ||
347 | /* Wait for DMA to complete */ | |
348 | do { | |
349 | DP_IN(base, DP_ISR, isr); | |
350 | } while ((isr & DP_ISR_RDC) == 0); | |
351 | ||
352 | /* Then disable DMA */ | |
353 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); | |
354 | ||
355 | /* Start transmit if not already going */ | |
356 | if (!dp->tx_started) { | |
357 | if (start_page == dp->tx1) { | |
358 | dp->tx_int = 1; /* Expecting interrupt from BUF1 */ | |
359 | } else { | |
360 | dp->tx_int = 2; /* Expecting interrupt from BUF2 */ | |
361 | } | |
362 | dp83902a_start_xmit(start_page, pkt_len); | |
363 | } | |
364 | } | |
365 | ||
366 | /* | |
367 | * This function is called when a packet has been received. It's job is | |
368 | * to prepare to unload the packet from the hardware. Once the length of | |
369 | * the packet is known, the upper layer of the driver can be told. When | |
370 | * the upper layer is ready to unload the packet, the internal function | |
371 | * 'dp83902a_recv' will be called to actually fetch it from the hardware. | |
372 | */ | |
373 | static void | |
374 | dp83902a_RxEvent(void) | |
375 | { | |
376 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
377 | u8 *base = dp->base; | |
4eaf172e | 378 | __maybe_unused u8 rsr; |
702c85b0 NI |
379 | u8 rcv_hdr[4]; |
380 | int i, len, pkt, cur; | |
381 | ||
382 | DEBUG_FUNCTION(); | |
383 | ||
384 | DP_IN(base, DP_RSR, rsr); | |
385 | while (true) { | |
386 | /* Read incoming packet header */ | |
387 | DP_OUT(base, DP_CR, DP_CR_PAGE1 | DP_CR_NODMA | DP_CR_START); | |
388 | DP_IN(base, DP_P1_CURP, cur); | |
389 | DP_OUT(base, DP_P1_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); | |
390 | DP_IN(base, DP_BNDRY, pkt); | |
391 | ||
392 | pkt += 1; | |
393 | if (pkt == dp->rx_buf_end) | |
394 | pkt = dp->rx_buf_start; | |
395 | ||
396 | if (pkt == cur) { | |
397 | break; | |
398 | } | |
399 | DP_OUT(base, DP_RBCL, sizeof(rcv_hdr)); | |
400 | DP_OUT(base, DP_RBCH, 0); | |
401 | DP_OUT(base, DP_RSAL, 0); | |
402 | DP_OUT(base, DP_RSAH, pkt); | |
403 | if (dp->rx_next == pkt) { | |
404 | if (cur == dp->rx_buf_start) | |
405 | DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); | |
406 | else | |
407 | DP_OUT(base, DP_BNDRY, cur - 1); /* Update pointer */ | |
408 | return; | |
409 | } | |
410 | dp->rx_next = pkt; | |
411 | DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ | |
412 | DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START); | |
413 | #ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA | |
414 | CYGACC_CALL_IF_DELAY_US(10); | |
415 | #endif | |
416 | ||
417 | /* read header (get data size)*/ | |
418 | for (i = 0; i < sizeof(rcv_hdr);) { | |
419 | DP_IN_DATA(dp->data, rcv_hdr[i++]); | |
420 | } | |
421 | ||
422 | #if DEBUG & 5 | |
423 | printf("rx hdr %02x %02x %02x %02x\n", | |
424 | rcv_hdr[0], rcv_hdr[1], rcv_hdr[2], rcv_hdr[3]); | |
425 | #endif | |
426 | len = ((rcv_hdr[3] << 8) | rcv_hdr[2]) - sizeof(rcv_hdr); | |
427 | ||
428 | /* data read */ | |
429 | uboot_push_packet_len(len); | |
430 | ||
431 | if (rcv_hdr[1] == dp->rx_buf_start) | |
432 | DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); | |
433 | else | |
434 | DP_OUT(base, DP_BNDRY, rcv_hdr[1] - 1); /* Update pointer */ | |
435 | } | |
436 | } | |
437 | ||
438 | /* | |
439 | * This function is called as a result of the "eth_drv_recv()" call above. | |
440 | * It's job is to actually fetch data for a packet from the hardware once | |
441 | * memory buffers have been allocated for the packet. Note that the buffers | |
442 | * may come in pieces, using a scatter-gather list. This allows for more | |
443 | * efficient processing in the upper layers of the stack. | |
444 | */ | |
445 | static void | |
446 | dp83902a_recv(u8 *data, int len) | |
447 | { | |
448 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
449 | u8 *base = dp->base; | |
450 | int i, mlen; | |
451 | u8 saved_char = 0; | |
452 | bool saved; | |
453 | #if DEBUG & 4 | |
454 | int dx; | |
455 | #endif | |
456 | ||
457 | DEBUG_FUNCTION(); | |
458 | ||
459 | #if DEBUG & 5 | |
460 | printf("Rx packet %d length %d\n", dp->rx_next, len); | |
461 | #endif | |
462 | ||
463 | /* Read incoming packet data */ | |
464 | DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); | |
465 | DP_OUT(base, DP_RBCL, len & 0xFF); | |
466 | DP_OUT(base, DP_RBCH, len >> 8); | |
467 | DP_OUT(base, DP_RSAL, 4); /* Past header */ | |
468 | DP_OUT(base, DP_RSAH, dp->rx_next); | |
469 | DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ | |
470 | DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START); | |
471 | #ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA | |
472 | CYGACC_CALL_IF_DELAY_US(10); | |
473 | #endif | |
474 | ||
475 | saved = false; | |
476 | for (i = 0; i < 1; i++) { | |
477 | if (data) { | |
478 | mlen = len; | |
479 | #if DEBUG & 4 | |
480 | printf(" sg buf %08lx len %08x \n", (u32) data, mlen); | |
481 | dx = 0; | |
482 | #endif | |
483 | while (0 < mlen) { | |
484 | /* Saved byte from previous loop? */ | |
485 | if (saved) { | |
486 | *data++ = saved_char; | |
487 | mlen--; | |
488 | saved = false; | |
489 | continue; | |
490 | } | |
491 | ||
492 | { | |
493 | u8 tmp; | |
494 | DP_IN_DATA(dp->data, tmp); | |
495 | #if DEBUG & 4 | |
496 | printf(" %02x", tmp); | |
497 | if (0 == (++dx % 16)) printf("\n "); | |
498 | #endif | |
51855e89 | 499 | *data++ = tmp; |
702c85b0 NI |
500 | mlen--; |
501 | } | |
502 | } | |
503 | #if DEBUG & 4 | |
504 | printf("\n"); | |
505 | #endif | |
506 | } | |
507 | } | |
508 | } | |
509 | ||
510 | static void | |
511 | dp83902a_TxEvent(void) | |
512 | { | |
513 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
514 | u8 *base = dp->base; | |
4eaf172e | 515 | __maybe_unused u8 tsr; |
702c85b0 NI |
516 | u32 key; |
517 | ||
518 | DEBUG_FUNCTION(); | |
519 | ||
520 | DP_IN(base, DP_TSR, tsr); | |
521 | if (dp->tx_int == 1) { | |
522 | key = dp->tx1_key; | |
523 | dp->tx1 = 0; | |
524 | } else { | |
525 | key = dp->tx2_key; | |
526 | dp->tx2 = 0; | |
527 | } | |
528 | /* Start next packet if one is ready */ | |
529 | dp->tx_started = false; | |
530 | if (dp->tx1) { | |
531 | dp83902a_start_xmit(dp->tx1, dp->tx1_len); | |
532 | dp->tx_int = 1; | |
533 | } else if (dp->tx2) { | |
534 | dp83902a_start_xmit(dp->tx2, dp->tx2_len); | |
535 | dp->tx_int = 2; | |
536 | } else { | |
537 | dp->tx_int = 0; | |
538 | } | |
539 | /* Tell higher level we sent this packet */ | |
540 | uboot_push_tx_done(key, 0); | |
541 | } | |
542 | ||
543 | /* | |
544 | * Read the tally counters to clear them. Called in response to a CNT | |
545 | * interrupt. | |
546 | */ | |
547 | static void | |
548 | dp83902a_ClearCounters(void) | |
549 | { | |
550 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
551 | u8 *base = dp->base; | |
4eaf172e | 552 | __maybe_unused u8 cnt1, cnt2, cnt3; |
702c85b0 NI |
553 | |
554 | DP_IN(base, DP_FER, cnt1); | |
555 | DP_IN(base, DP_CER, cnt2); | |
556 | DP_IN(base, DP_MISSED, cnt3); | |
557 | DP_OUT(base, DP_ISR, DP_ISR_CNT); | |
558 | } | |
559 | ||
560 | /* | |
561 | * Deal with an overflow condition. This code follows the procedure set | |
562 | * out in section 7.0 of the datasheet. | |
563 | */ | |
564 | static void | |
565 | dp83902a_Overflow(void) | |
566 | { | |
567 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *)&nic; | |
568 | u8 *base = dp->base; | |
569 | u8 isr; | |
570 | ||
571 | /* Issue a stop command and wait 1.6ms for it to complete. */ | |
572 | DP_OUT(base, DP_CR, DP_CR_STOP | DP_CR_NODMA); | |
573 | CYGACC_CALL_IF_DELAY_US(1600); | |
574 | ||
575 | /* Clear the remote byte counter registers. */ | |
576 | DP_OUT(base, DP_RBCL, 0); | |
577 | DP_OUT(base, DP_RBCH, 0); | |
578 | ||
579 | /* Enter loopback mode while we clear the buffer. */ | |
580 | DP_OUT(base, DP_TCR, DP_TCR_LOCAL); | |
581 | DP_OUT(base, DP_CR, DP_CR_START | DP_CR_NODMA); | |
582 | ||
583 | /* | |
584 | * Read in as many packets as we can and acknowledge any and receive | |
585 | * interrupts. Since the buffer has overflowed, a receive event of | |
eae4b2b6 | 586 | * some kind will have occurred. |
702c85b0 NI |
587 | */ |
588 | dp83902a_RxEvent(); | |
589 | DP_OUT(base, DP_ISR, DP_ISR_RxP|DP_ISR_RxE); | |
590 | ||
591 | /* Clear the overflow condition and leave loopback mode. */ | |
592 | DP_OUT(base, DP_ISR, DP_ISR_OFLW); | |
593 | DP_OUT(base, DP_TCR, DP_TCR_NORMAL); | |
594 | ||
595 | /* | |
eae4b2b6 | 596 | * If a transmit command was issued, but no transmit event has occurred, |
702c85b0 NI |
597 | * restart it here. |
598 | */ | |
599 | DP_IN(base, DP_ISR, isr); | |
600 | if (dp->tx_started && !(isr & (DP_ISR_TxP|DP_ISR_TxE))) { | |
601 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START); | |
602 | } | |
603 | } | |
604 | ||
605 | static void | |
606 | dp83902a_poll(void) | |
607 | { | |
608 | struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; | |
609 | u8 *base = dp->base; | |
610 | u8 isr; | |
611 | ||
612 | DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0 | DP_CR_START); | |
613 | DP_IN(base, DP_ISR, isr); | |
614 | while (0 != isr) { | |
615 | /* | |
616 | * The CNT interrupt triggers when the MSB of one of the error | |
617 | * counters is set. We don't much care about these counters, but | |
618 | * we should read their values to reset them. | |
619 | */ | |
620 | if (isr & DP_ISR_CNT) { | |
621 | dp83902a_ClearCounters(); | |
622 | } | |
623 | /* | |
624 | * Check for overflow. It's a special case, since there's a | |
625 | * particular procedure that must be followed to get back into | |
626 | * a running state.a | |
627 | */ | |
628 | if (isr & DP_ISR_OFLW) { | |
629 | dp83902a_Overflow(); | |
630 | } else { | |
631 | /* | |
632 | * Other kinds of interrupts can be acknowledged simply by | |
633 | * clearing the relevant bits of the ISR. Do that now, then | |
634 | * handle the interrupts we care about. | |
635 | */ | |
636 | DP_OUT(base, DP_ISR, isr); /* Clear set bits */ | |
637 | if (!dp->running) break; /* Is this necessary? */ | |
638 | /* | |
639 | * Check for tx_started on TX event since these may happen | |
640 | * spuriously it seems. | |
641 | */ | |
642 | if (isr & (DP_ISR_TxP|DP_ISR_TxE) && dp->tx_started) { | |
643 | dp83902a_TxEvent(); | |
644 | } | |
645 | if (isr & (DP_ISR_RxP|DP_ISR_RxE)) { | |
646 | dp83902a_RxEvent(); | |
647 | } | |
648 | } | |
649 | DP_IN(base, DP_ISR, isr); | |
650 | } | |
651 | } | |
652 | ||
653 | ||
a187559e | 654 | /* U-Boot specific routines */ |
702c85b0 NI |
655 | static u8 *pbuf = NULL; |
656 | ||
657 | static int pkey = -1; | |
658 | static int initialized = 0; | |
659 | ||
660 | void uboot_push_packet_len(int len) { | |
661 | PRINTK("pushed len = %d\n", len); | |
662 | if (len >= 2000) { | |
663 | printf("NE2000: packet too big\n"); | |
664 | return; | |
665 | } | |
666 | dp83902a_recv(&pbuf[0], len); | |
667 | ||
668 | /*Just pass it to the upper layer*/ | |
1fd92db8 | 669 | net_process_received_packet(&pbuf[0], len); |
702c85b0 NI |
670 | } |
671 | ||
672 | void uboot_push_tx_done(int key, int val) { | |
673 | PRINTK("pushed key = %d\n", key); | |
674 | pkey = key; | |
675 | } | |
676 | ||
d0201692 BK |
677 | /** |
678 | * Setup the driver and init MAC address according to doc/README.enetaddr | |
679 | * Called by ne2k_register() before registering the driver @eth layer | |
680 | * | |
681 | * @param struct ethdevice of this instance of the driver for dev->enetaddr | |
682 | * @return 0 on success, -1 on error (causing caller to print error msg) | |
683 | */ | |
684 | static int ne2k_setup_driver(struct eth_device *dev) | |
685 | { | |
686 | PRINTK("### ne2k_setup_driver\n"); | |
702c85b0 NI |
687 | |
688 | if (!pbuf) { | |
689 | pbuf = malloc(2000); | |
690 | if (!pbuf) { | |
691 | printf("Cannot allocate rx buffer\n"); | |
692 | return -1; | |
693 | } | |
694 | } | |
695 | ||
696 | #ifdef CONFIG_DRIVER_NE2000_CCR | |
697 | { | |
698 | vu_char *p = (vu_char *) CONFIG_DRIVER_NE2000_CCR; | |
699 | ||
700 | PRINTK("CCR before is %x\n", *p); | |
701 | *p = CONFIG_DRIVER_NE2000_VAL; | |
702 | PRINTK("CCR after is %x\n", *p); | |
703 | } | |
704 | #endif | |
705 | ||
706 | nic.base = (u8 *) CONFIG_DRIVER_NE2000_BASE; | |
707 | ||
702c85b0 NI |
708 | nic.data = nic.base + DP_DATA; |
709 | nic.tx_buf1 = START_PG; | |
710 | nic.tx_buf2 = START_PG2; | |
711 | nic.rx_buf_start = RX_START; | |
712 | nic.rx_buf_end = RX_END; | |
713 | ||
d0201692 BK |
714 | /* |
715 | * According to doc/README.enetaddr, drivers shall give priority | |
716 | * to the MAC address value in the environment, so we do not read | |
717 | * it from the prom or eeprom if it is specified in the environment. | |
718 | */ | |
35affd7a | 719 | if (!eth_env_get_enetaddr("ethaddr", dev->enetaddr)) { |
d0201692 BK |
720 | /* If the MAC address is not in the environment, get it: */ |
721 | if (!get_prom(dev->enetaddr, nic.base)) /* get MAC from prom */ | |
722 | dp83902a_init(dev->enetaddr); /* fallback: seeprom */ | |
723 | /* And write it into the environment otherwise eth_write_hwaddr | |
35affd7a | 724 | * returns -1 due to eth_env_get_enetaddr_by_index() failing, |
d0201692 BK |
725 | * and this causes "Warning: failed to set MAC address", and |
726 | * cmd_bdinfo has no ethaddr value which it can show: */ | |
fd1e959e | 727 | eth_env_set_enetaddr("ethaddr", dev->enetaddr); |
d0201692 BK |
728 | } |
729 | return 0; | |
730 | } | |
702c85b0 | 731 | |
d0201692 BK |
732 | static int ne2k_init(struct eth_device *dev, bd_t *bd) |
733 | { | |
734 | dp83902a_start(dev->enetaddr); | |
702c85b0 | 735 | initialized = 1; |
702c85b0 NI |
736 | return 0; |
737 | } | |
738 | ||
d0201692 BK |
739 | static void ne2k_halt(struct eth_device *dev) |
740 | { | |
741 | debug("### ne2k_halt\n"); | |
702c85b0 NI |
742 | if(initialized) |
743 | dp83902a_stop(); | |
744 | initialized = 0; | |
745 | } | |
746 | ||
d0201692 BK |
747 | static int ne2k_recv(struct eth_device *dev) |
748 | { | |
702c85b0 NI |
749 | dp83902a_poll(); |
750 | return 1; | |
751 | } | |
752 | ||
10cbe3b6 | 753 | static int ne2k_send(struct eth_device *dev, void *packet, int length) |
d0201692 | 754 | { |
702c85b0 NI |
755 | int tmo; |
756 | ||
d0201692 | 757 | debug("### ne2k_send\n"); |
702c85b0 NI |
758 | |
759 | pkey = -1; | |
760 | ||
761 | dp83902a_send((u8 *) packet, length, 666); | |
6d0f6bcf | 762 | tmo = get_timer (0) + TOUT * CONFIG_SYS_HZ; |
702c85b0 NI |
763 | while(1) { |
764 | dp83902a_poll(); | |
765 | if (pkey != -1) { | |
766 | PRINTK("Packet sucesfully sent\n"); | |
767 | return 0; | |
768 | } | |
769 | if (get_timer (0) >= tmo) { | |
770 | printf("transmission error (timoeut)\n"); | |
771 | return 0; | |
772 | } | |
773 | ||
774 | } | |
775 | return 0; | |
776 | } | |
d0201692 BK |
777 | |
778 | /** | |
779 | * Setup the driver for use and register it with the eth layer | |
780 | * @return 0 on success, -1 on error (causing caller to print error msg) | |
781 | */ | |
782 | int ne2k_register(void) | |
783 | { | |
784 | struct eth_device *dev; | |
785 | ||
786 | dev = calloc(sizeof(*dev), 1); | |
787 | if (dev == NULL) | |
788 | return -1; | |
789 | ||
790 | if (ne2k_setup_driver(dev)) | |
791 | return -1; | |
792 | ||
793 | dev->init = ne2k_init; | |
794 | dev->halt = ne2k_halt; | |
795 | dev->send = ne2k_send; | |
796 | dev->recv = ne2k_recv; | |
797 | ||
192bc694 | 798 | strcpy(dev->name, "NE2000"); |
d0201692 BK |
799 | |
800 | return eth_register(dev); | |
801 | } |