1 /* $NetBSD: if_ed_zbus.c,v 1.2 2012/10/27 21:13:03 phx Exp $ */
2
3 /*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Frank Wille.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Device driver for the Hydra Systems and ASDG ethernet cards.
34 * Based on the National Semiconductor DS8390/WD83C690.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: if_ed_zbus.c,v 1.2 2012/10/27 21:13:03 phx Exp $");
39
40 #include <sys/param.h>
41 #include <sys/device.h>
42 #include <sys/bus.h>
43
44 #include <net/if.h>
45 #include <net/if_media.h>
46 #include <net/if_ether.h>
47
48 #include <dev/ic/dp8390reg.h>
49 #include <dev/ic/dp8390var.h>
50
51 #include <amiga/amiga/device.h>
52 #include <amiga/amiga/isr.h>
53 #include <amiga/dev/zbusvar.h>
54
55 #define ETHER_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN)
56
57 /* Hydra Systems AmigaNet */
58 #define HYDRA_MANID 2121
59 #define HYDRA_PRODID 1
60 #define HYDRA_REGADDR 0xffe1
61 #define HYDRA_MEMADDR 0
62 #define HYDRA_PROMADDR 0xffc0
63
64 /* ASDG LANRover */
65 #define ASDG_MANID 1023
66 #define ASDG_PRODID 254
67 #define ASDG_REGADDR 0x1
68 #define ASDG_MEMADDR 0x8000
69 #define ASDG_PROMADDR 0x100
70
71 /* Buffer size is always 16k */
72 #define ED_ZBUS_MEMSIZE 0x4000
73
74 int ed_zbus_match(device_t, cfdata_t , void *);
75 void ed_zbus_attach(device_t, device_t, void *);
76 int ed_zbus_test_mem(struct dp8390_softc *);
77 void ed_zbus_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
78 int ed_zbus_ring_copy(struct dp8390_softc *, int, void *, u_short);
79 int ed_zbus_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
80
81 struct ed_zbus_softc {
82 struct dp8390_softc sc_dp8390;
83 struct bus_space_tag sc_bst;
84 struct isr sc_isr;
85 };
86
87 CFATTACH_DECL_NEW(ed_zbus, sizeof(struct ed_zbus_softc),
88 ed_zbus_match, ed_zbus_attach, NULL, NULL);
89
90
91 int
ed_zbus_match(device_t parent,cfdata_t cf,void * aux)92 ed_zbus_match(device_t parent, cfdata_t cf, void *aux)
93 {
94 struct zbus_args *zap = aux;
95
96 if (zap->manid == HYDRA_MANID && zap->prodid == HYDRA_PRODID)
97 return 1;
98 else if (zap->manid == ASDG_MANID && zap->prodid == ASDG_PRODID)
99 return 1;
100 return 0;
101 }
102
103 void
ed_zbus_attach(device_t parent,device_t self,void * aux)104 ed_zbus_attach(device_t parent, device_t self, void *aux)
105 {
106 struct ed_zbus_softc *zsc = device_private(self);
107 struct dp8390_softc *sc = &zsc->sc_dp8390;
108 struct zbus_args *zap = aux;
109 bus_space_handle_t promh;
110 bus_addr_t memaddr, promaddr, regaddr;
111 int i;
112
113 zsc->sc_bst.base = (bus_addr_t)zap->va;
114 zsc->sc_bst.absm = &amiga_bus_stride_1;
115
116 if (zap->manid == HYDRA_MANID) {
117 regaddr = HYDRA_REGADDR;
118 memaddr = HYDRA_MEMADDR;
119 promaddr = HYDRA_PROMADDR;
120 } else {
121 regaddr = ASDG_REGADDR;
122 memaddr = ASDG_MEMADDR;
123 promaddr = ASDG_PROMADDR;
124 }
125
126 sc->sc_dev = self;
127 sc->sc_regt = &zsc->sc_bst;
128 sc->sc_buft = &zsc->sc_bst;
129
130 if (bus_space_map(sc->sc_regt, regaddr, 0x20, 0, &sc->sc_regh)) {
131 aprint_error_dev(self, "can't map i/o space\n");
132 return;
133 }
134
135 if (bus_space_map(sc->sc_buft, memaddr, ED_ZBUS_MEMSIZE, 0,
136 &sc->sc_bufh)) {
137 aprint_error_dev(self, "can't map buffer space\n");
138 return;
139 }
140
141 /* SRAM buffer size is always 16K */
142 sc->mem_start = 0;
143 sc->mem_size = ED_ZBUS_MEMSIZE;
144
145 /*
146 * Read the ethernet address from the PROM.
147 * Interrupts must be inactive when reading the PROM, as the
148 * interrupt line is shared with one of its address lines.
149 */
150
151 NIC_PUT(sc->sc_regt, sc->sc_regh, ED_P0_IMR, 0x00);
152 NIC_PUT(sc->sc_regt, sc->sc_regh, ED_P0_ISR, 0xff);
153
154 if (bus_space_map(&zsc->sc_bst, promaddr, ETHER_ADDR_LEN * 2, 0,
155 &promh) == 0) {
156 for (i = 0; i < ETHER_ADDR_LEN; i++)
157 sc->sc_enaddr[i] =
158 bus_space_read_1(&zsc->sc_bst, promh, i * 2);
159
160 bus_space_unmap(&zsc->sc_bst, promh, ETHER_ADDR_LEN * 2);
161 }
162
163 /* Initialize sc_reg_map[]. Registers have stride 2 on the bus. */
164 for (i = 0; i < 16; i++)
165 sc->sc_reg_map[i] = i << 1;
166
167 /*
168 * Set 2 word FIFO threshold, no auto-init Remote DMA,
169 * byte order 68k, word-wide DMA xfers.
170 */
171 sc->dcr_reg = ED_DCR_FT0 | ED_DCR_WTS | ED_DCR_LS | ED_DCR_BOS;
172
173 /* Remote DMA abort .*/
174 sc->cr_proto = ED_CR_RD2;
175
176 /*
177 * Override all functions which deal with the buffer, because
178 * this implementation only allows 16-bit buffer accesses.
179 */
180 sc->test_mem = ed_zbus_test_mem;
181 sc->read_hdr = ed_zbus_read_hdr;
182 sc->ring_copy = ed_zbus_ring_copy;
183 sc->write_mbuf = ed_zbus_write_mbuf;
184
185 sc->sc_flags = device_cfdata(self)->cf_flags;
186 sc->is790 = 0;
187 sc->sc_media_init = dp8390_media_init;
188 sc->sc_enabled = 1;
189
190 /* Do generic DS8390/WD83C690 config. */
191 if (dp8390_config(sc)) {
192 bus_space_unmap(sc->sc_buft, sc->sc_bufh, ED_ZBUS_MEMSIZE);
193 bus_space_unmap(sc->sc_regt, sc->sc_regh, 0x10);
194 return;
195 }
196
197 /* establish level 2 interrupt handler */
198 zsc->sc_isr.isr_intr = dp8390_intr;
199 zsc->sc_isr.isr_arg = sc;
200 zsc->sc_isr.isr_ipl = 2;
201 add_isr(&zsc->sc_isr);
202 }
203
204 int
ed_zbus_test_mem(struct dp8390_softc * sc)205 ed_zbus_test_mem(struct dp8390_softc *sc)
206 {
207 bus_space_tag_t buft = sc->sc_buft;
208 bus_space_handle_t bufh = sc->sc_bufh;
209 int i;
210
211 bus_space_set_region_2(buft, bufh, sc->mem_start, 0,
212 sc->mem_size >> 1);
213
214 for (i = 0; i < sc->mem_size; i += 2) {
215 if (bus_space_read_2(sc->sc_buft, sc->sc_bufh, i)) {
216 printf(": failed to clear NIC buffer at offset %x - "
217 "check configuration\n", (sc->mem_start + i));
218 return 1;
219 }
220 }
221 return 0;
222 }
223
224 void
ed_zbus_read_hdr(struct dp8390_softc * sc,int src,struct dp8390_ring * hdrp)225 ed_zbus_read_hdr(struct dp8390_softc *sc, int src, struct dp8390_ring *hdrp)
226 {
227 bus_space_tag_t buft = sc->sc_buft;
228 bus_space_handle_t bufh = sc->sc_bufh;
229 uint16_t wrd[2];
230
231 /*
232 * Read the 4-byte header as two 16-bit words in little-endian
233 * format. Convert into big-endian and put them into hdrp.
234 */
235 bus_space_read_region_stream_2(buft, bufh, src, wrd, 2);
236 hdrp->rsr = wrd[0] & 0xff;
237 hdrp->next_packet = wrd[0] >> 8;
238 hdrp->count = bswap16(wrd[1]);
239 }
240
241 /*
242 * Copy `amount' bytes from a packet in the ring buffer to a linear
243 * destination buffer, given a source offset and destination address.
244 * Takes into account ring-wrap.
245 */
246 int
ed_zbus_ring_copy(struct dp8390_softc * sc,int src,void * dst,u_short amount)247 ed_zbus_ring_copy(struct dp8390_softc *sc, int src, void *dst, u_short amount)
248 {
249 bus_space_tag_t buft = sc->sc_buft;
250 bus_space_handle_t bufh = sc->sc_bufh;
251 u_short tmp_amount;
252 u_char readbyte[2];
253
254 /* Does copy wrap to lower addr in ring buffer? */
255 if (src + amount > sc->mem_end) {
256 tmp_amount = sc->mem_end - src;
257
258 /* copy amount up to end of NIC memory */
259 bus_space_read_region_stream_2(buft, bufh, src, dst,
260 tmp_amount >> 1);
261
262 amount -= tmp_amount;
263 src = sc->mem_ring;
264 dst = (u_char *)dst + tmp_amount;
265 }
266
267 bus_space_read_region_stream_2(buft, bufh, src, dst, amount >> 1);
268
269 /* handle odd length packet */
270 if (amount & 1) {
271 bus_space_read_region_stream_2(buft, bufh, src + amount - 1,
272 (u_int16_t *)readbyte, 1);
273 *((u_char *)dst + amount - 1) = readbyte[0];
274 amount++;
275 }
276
277 return src + amount;
278 }
279
280 /*
281 * Copy packet from mbuf to the board memory. Currently uses an extra
282 * buffer/extra memory copy, unless the whole packet fits in one mbuf.
283 * As in the test_mem function, we use word-wide writes.
284 */
285 int
ed_zbus_write_mbuf(struct dp8390_softc * sc,struct mbuf * m,int buf)286 ed_zbus_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
287 {
288 u_char *data, savebyte[2];
289 int len, wantbyte;
290 u_short totlen = 0;
291
292 wantbyte = 0;
293
294 for (; m ; m = m->m_next) {
295 data = mtod(m, u_char *);
296 len = m->m_len;
297 totlen += len;
298 if (len > 0) {
299 /* Finish the last word. */
300 if (wantbyte) {
301 savebyte[1] = *data;
302 bus_space_write_region_stream_2(sc->sc_buft,
303 sc->sc_bufh, buf,
304 (u_int16_t *)savebyte, 1);
305 buf += 2;
306 data++;
307 len--;
308 wantbyte = 0;
309 }
310 /* Output contiguous words. */
311 if (len > 1) {
312 bus_space_write_region_stream_2(sc->sc_buft,
313 sc->sc_bufh, buf,
314 (u_int16_t *)data, len >> 1);
315 buf += len & ~1;
316 data += len & ~1;
317 len &= 1;
318 }
319 /* Save last byte, if necessary. */
320 if (len == 1) {
321 savebyte[0] = *data;
322 wantbyte = 1;
323 }
324 }
325 }
326
327 len = ETHER_PAD_LEN - totlen;
328 if (wantbyte) {
329 savebyte[1] = 0;
330 bus_space_write_region_stream_2(sc->sc_buft, sc->sc_bufh,
331 buf, (u_int16_t *)savebyte, 1);
332 buf += 2;
333 totlen++;
334 len--;
335 }
336 /* if sent data is shorter than EHTER_PAD_LEN, put 0 to padding */
337 if (len > 0) {
338 bus_space_set_region_2(sc->sc_buft, sc->sc_bufh, buf, 0,
339 len >> 1);
340 totlen = ETHER_PAD_LEN;
341 }
342 return totlen;
343 }
344