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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / dev / isa / cs89x0isa.c
blob20a7a4387ca44f8fc9ab5bc1ddb02a7fb098240f
1 /* $NetBSD: cs89x0isa.c,v 1.14 2008/04/08 20:08:49 cegger Exp $ */
2
3 /*
4 * Copyright 1997
5 * Digital Equipment Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and
8 * copied only in accordance with the following terms and conditions.
9 * Subject to these conditions, you may download, copy, install,
10 * use, modify and distribute this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce
14 * and retain this copyright notice and list of conditions as
15 * they appear in the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 * Digital Equipment Corporation. Neither the "Digital Equipment
19 * Corporation" name nor any trademark or logo of Digital Equipment
20 * Corporation may be used to endorse or promote products derived
21 * from this software without the prior written permission of
22 * Digital Equipment Corporation.
23 *
24 * 3) This software is provided "AS-IS" and any express or implied
25 * warranties, including but not limited to, any implied warranties
26 * of merchantability, fitness for a particular purpose, or
27 * non-infringement are disclaimed. In no event shall DIGITAL be
28 * liable for any damages whatsoever, and in particular, DIGITAL
29 * shall not be liable for special, indirect, consequential, or
30 * incidental damages or damages for lost profits, loss of
31 * revenue or loss of use, whether such damages arise in contract,
32 * negligence, tort, under statute, in equity, at law or otherwise,
33 * even if advised of the possibility of such damage.
34 */
35
36 /* isa DMA routines for cs89x0 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: cs89x0isa.c,v 1.14 2008/04/08 20:08:49 cegger Exp $");
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/mbuf.h>
44 #include <sys/socket.h>
45 #include <sys/device.h>
46
47 #include "rnd.h"
48 #if NRND > 0
49 #include <sys/rnd.h>
50 #endif
51
52 #include <net/if.h>
53 #include <net/if_ether.h>
54 #include <net/if_media.h>
55
56 #include <sys/bus.h>
57
58 #include <dev/isa/isareg.h>
59 #include <dev/isa/isavar.h>
60 #include <dev/isa/isadmavar.h>
61
62 #include <dev/ic/cs89x0reg.h>
63 #include <dev/ic/cs89x0var.h>
64 #include <dev/isa/cs89x0isavar.h>
65
66 #define DMA_STATUS_BITS 0x0007 /* bit masks for checking DMA status */
67 #define DMA_STATUS_OK 0x0004
68
69 void
70 cs_isa_dma_attach(struct cs_softc *sc)
71 {
72 struct cs_softc_isa *isc = (struct cs_softc_isa *)sc;
73
74 if (isc->sc_drq == ISA_UNKNOWN_DRQ)
75 printf("%s: DMA channel unspecified, not using DMA\n",
76 device_xname(sc->sc_dev));
77 else if (isc->sc_drq < 5 || isc->sc_drq > 7)
78 printf("%s: invalid DMA channel, not using DMA\n",
79 device_xname(sc->sc_dev));
80 else {
81 bus_size_t maxsize;
82 bus_addr_t dma_addr;
83
84 maxsize = isa_dmamaxsize(isc->sc_ic, isc->sc_drq);
85 if (maxsize < CS8900_DMASIZE) {
86 printf("%s: max DMA size %lu is"
87 " less than required %d\n",
88 device_xname(sc->sc_dev), (u_long)maxsize,
89 CS8900_DMASIZE);
90 goto after_dma_block;
91 }
92
93 if (isa_drq_alloc(isc->sc_ic, isc->sc_drq) != 0) {
94 aprint_error_dev(sc->sc_dev,
95 "unable to reserve drq %d\n",
96 isc->sc_drq);
97 goto after_dma_block;
98 }
99
100 if (isa_dmamap_create(isc->sc_ic, isc->sc_drq,
101 CS8900_DMASIZE, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW) != 0) {
102 aprint_error_dev(sc->sc_dev,
103 "unable to create ISA DMA map\n");
104 goto after_dma_block;
105 }
106 if (isa_dmamem_alloc(isc->sc_ic, isc->sc_drq,
107 CS8900_DMASIZE, &dma_addr, BUS_DMA_NOWAIT) != 0) {
108 aprint_error_dev(sc->sc_dev,
109 "unable to allocate DMA buffer\n");
110 goto after_dma_block;
111 }
112 if (isa_dmamem_map(isc->sc_ic, isc->sc_drq, dma_addr,
113 CS8900_DMASIZE, (void **)&isc->sc_dmabase,
114 BUS_DMA_NOWAIT | BUS_DMA_COHERENT /* XXX */ ) != 0) {
115 aprint_error_dev(sc->sc_dev,
116 "unable to map DMA buffer\n");
117 isa_dmamem_free(isc->sc_ic, isc->sc_drq, dma_addr,
118 CS8900_DMASIZE);
119 goto after_dma_block;
120 }
121
122 isc->sc_dmasize = CS8900_DMASIZE;
123 sc->sc_cfgflags |= CFGFLG_DMA_MODE;
124 isc->sc_dmaaddr = dma_addr;
125 after_dma_block:
126 ;
127 }
128 }
129
130 void cs_isa_dma_chipinit(struct cs_softc *sc)
131 {
132 struct cs_softc_isa *isc = (struct cs_softc_isa *)sc;
133
134 if (sc->sc_cfgflags & CFGFLG_DMA_MODE) {
135 /*
136 * First we program the DMA controller and ensure the memory
137 * buffer is valid. If it isn't then we just go on without
138 * DMA.
139 */
140 if (isa_dmastart(isc->sc_ic, isc->sc_drq, isc->sc_dmabase,
141 isc->sc_dmasize, NULL, DMAMODE_READ | DMAMODE_LOOPDEMAND,
142 BUS_DMA_NOWAIT)) {
143 /* XXX XXX XXX */
144 panic("%s: unable to start DMA",
145 device_xname(sc->sc_dev));
146 }
147 isc->sc_dmacur = isc->sc_dmabase;
148
149 /* interrupt when a DMA'd frame is received */
150 CS_WRITE_PACKET_PAGE(sc, PKTPG_RX_CFG,
151 RX_CFG_ALL_IE | RX_CFG_RX_DMA_ONLY);
152
153 /*
154 * set the DMA burst bit so we don't tie up the bus for too
155 * long.
156 */
157 if (isc->sc_dmasize == 16384) {
158 CS_WRITE_PACKET_PAGE(sc, PKTPG_BUS_CTL,
159 ((CS_READ_PACKET_PAGE(sc, PKTPG_BUS_CTL) &
160 ~BUS_CTL_DMA_SIZE) | BUS_CTL_DMA_BURST));
161 } else { /* use 64K */
162 CS_WRITE_PACKET_PAGE(sc, PKTPG_BUS_CTL,
163 CS_READ_PACKET_PAGE(sc, PKTPG_BUS_CTL) |
164 BUS_CTL_DMA_SIZE | BUS_CTL_DMA_BURST);
165 }
166
167 CS_WRITE_PACKET_PAGE(sc, PKTPG_DMA_CHANNEL, isc->sc_drq - 5);
168 }
169 }
170
171 void cs_process_rx_dma(struct cs_softc *sc)
172 {
173 struct cs_softc_isa *isc = (struct cs_softc_isa *)sc;
174 struct ifnet *ifp;
175 u_int16_t num_dma_frames;
176 u_int16_t pkt_length;
177 u_int16_t status;
178 u_int to_copy;
179 char *dma_mem_ptr;
180 struct mbuf *m;
181 u_char *pBuff;
182 int pad;
183
184 /* initialise the pointers */
185 ifp = &sc->sc_ethercom.ec_if;
186
187 /* Read the number of frames DMAed. */
188 num_dma_frames = CS_READ_PACKET_PAGE(sc, PKTPG_DMA_FRAME_COUNT);
189 num_dma_frames &= (u_int16_t) (0x0fff);
190
191 /*
192 * Loop till number of DMA frames ready to read is zero. After
193 * reading the frame out of memory we must check if any have been
194 * received while we were processing
195 */
196 while (num_dma_frames != 0) {
197 dma_mem_ptr = isc->sc_dmacur;
198
199 /*
200 * process all of the DMA frames in memory
201 *
202 * This loop relies on the dma_mem_ptr variable being set to the
203 * next frames start address.
204 */
205 for (; num_dma_frames > 0; num_dma_frames--) {
206
207 /*
208 * Get the length and status of the packet. Only the
209 * status is guaranteed to be at dma_mem_ptr, ie need
210 * to check for wraparound before reading the length
211 */
212 status = *((u_int16_t *) dma_mem_ptr);
213 dma_mem_ptr += 2;
214 if (dma_mem_ptr > (isc->sc_dmabase + isc->sc_dmasize)) {
215 dma_mem_ptr = isc->sc_dmabase;
216 }
217 pkt_length = *((u_int16_t *) dma_mem_ptr);
218 dma_mem_ptr += 2;
219
220 /* Do some sanity checks on the length and status. */
221 if ((pkt_length > ETHER_MAX_LEN) ||
222 ((status & DMA_STATUS_BITS) != DMA_STATUS_OK)) {
223 /*
224 * the SCO driver kills the adapter in this
225 * situation
226 */
227 /*
228 * should increment the error count and reset
229 * the DMA operation.
230 */
231 printf("%s: cs_process_rx_dma: "
232 "DMA buffer out of sync about to reset\n",
233 device_xname(sc->sc_dev));
234 ifp->if_ierrors++;
235
236 /* skip the rest of the DMA buffer */
237 isa_dmaabort(isc->sc_ic, isc->sc_drq);
238
239 /* now reset the chip and reinitialise */
240 cs_init(&sc->sc_ethercom.ec_if);
241 return;
242 }
243 /* Check the status of the received packet. */
244 if (status & RX_EVENT_RX_OK) {
245 /* get a new mbuf */
246 MGETHDR(m, M_DONTWAIT, MT_DATA);
247 if (m == 0) {
248 printf("%s: cs_process_rx_dma: "
249 "unable to allocate mbuf\n",
250 device_xname(sc->sc_dev));
251 ifp->if_ierrors++;
252 /*
253 * couldn't allocate an mbuf so
254 * things are not good, may as well
255 * drop all the packets I think.
256 */
257 CS_READ_PACKET_PAGE(sc,
258 PKTPG_DMA_FRAME_COUNT);
259
260 /* now reset DMA operation */
261 isa_dmaabort(isc->sc_ic, isc->sc_drq);
262
263 /*
264 * now reset the chip and
265 * reinitialise
266 */
267 cs_init(&sc->sc_ethercom.ec_if);
268 return;
269 }
270 /*
271 * save processing by always using a mbuf
272 * cluster, guaranteed to fit packet
273 */
274 MCLGET(m, M_DONTWAIT);
275 if ((m->m_flags & M_EXT) == 0) {
276 /* couldn't allocate an mbuf cluster */
277 printf("%s: cs_process_rx_dma: "
278 "unable to allocate a cluster\n",
279 device_xname(sc->sc_dev));
280 m_freem(m);
281
282 /* skip the frame */
283 CS_READ_PACKET_PAGE(sc, PKTPG_DMA_FRAME_COUNT);
284 isa_dmaabort(isc->sc_ic, isc->sc_drq);
285
286 /*
287 * now reset the chip and
288 * reinitialise
289 */
290 cs_init(&sc->sc_ethercom.ec_if);
291 return;
292 }
293 m->m_pkthdr.rcvif = ifp;
294 m->m_pkthdr.len = pkt_length;
295 m->m_len = pkt_length;
296
297 /*
298 * align ip header on word boundary for
299 * ipintr
300 */
301 pad = ALIGN(sizeof(struct ether_header)) -
302 sizeof(struct ether_header);
303 m->m_data += pad;
304
305 /*
306 * set up the buffer pointer to point to the
307 * data area
308 */
309 pBuff = mtod(m, char *);
310
311 /*
312 * Read the frame into free_pktbuf
313 * The buffer is circular buffer, either
314 * 16K or 64K in length.
315 *
316 * need to check where the end of the buffer
317 * is and go back to the start.
318 */
319 if ((dma_mem_ptr + pkt_length) <
320 (isc->sc_dmabase + isc->sc_dmasize)) {
321 /*
322 * No wrap around. Copy the frame
323 * header
324 */
325 memcpy(pBuff, dma_mem_ptr, pkt_length);
326 dma_mem_ptr += pkt_length;
327 } else {
328 to_copy = (u_int)
329 ((isc->sc_dmabase + isc->sc_dmasize) -
330 dma_mem_ptr);
331
332 /* Copy the first half of the frame. */
333 memcpy(pBuff, dma_mem_ptr, to_copy);
334 pBuff += to_copy;
335
336 /*
337 * Rest of the frame is to be read
338 * from the first byte of the DMA
339 * memory.
340 */
341 /*
342 * Get the number of bytes leftout in
343 * the frame.
344 */
345 to_copy = pkt_length - to_copy;
346
347 dma_mem_ptr = isc->sc_dmabase;
348
349 /* Copy rest of the frame. */
350 memcpy(pBuff, dma_mem_ptr, to_copy);
351 dma_mem_ptr += to_copy;
352 }
353
354 cs_ether_input(sc, m);
355 }
356 /* (status & RX_OK) */
357 else {
358 /* the frame was not received OK */
359 /* Increment the input error count */
360 ifp->if_ierrors++;
361
362 /*
363 * If debugging is enabled then log error
364 * messages if we got any.
365 */
366 if ((ifp->if_flags & IFF_DEBUG) &&
367 status != REG_NUM_RX_EVENT)
368 cs_print_rx_errors(sc, status);
369 }
370 /*
371 * now update the current frame pointer. the
372 * dma_mem_ptr should point to the next packet to be
373 * received, without the alignment considerations.
374 *
375 * The cs8900 pads all frames to start at the next 32bit
376 * aligned addres. hence we need to pad our offset
377 * pointer.
378 */
379 dma_mem_ptr += 3;
380 dma_mem_ptr = (char *)
381 ((long) dma_mem_ptr & 0xfffffffc);
382 if (dma_mem_ptr < (isc->sc_dmabase + isc->sc_dmasize)) {
383 isc->sc_dmacur = dma_mem_ptr;
384 } else {
385 dma_mem_ptr = isc->sc_dmacur = isc->sc_dmabase;
386 }
387 } /* for all frames */
388 /* Read the number of frames DMAed again. */
389 num_dma_frames = CS_READ_PACKET_PAGE(sc, PKTPG_DMA_FRAME_COUNT);
390 num_dma_frames &= (u_int16_t) (0x0fff);
391 } /* while there are frames left */
392 }
NetBSD on the FriendlyARM MINI2440