1 /* $NetBSD: if_ie_mvme.c,v 1.13 2008/04/28 20:23:54 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: if_ie_mvme.c,v 1.13 2008/04/28 20:23:54 martin Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/mbuf.h>
38 #include <sys/errno.h>
39 #include <sys/device.h>
40 #include <sys/protosw.h>
41 #include <sys/socket.h>
42
43 #include <net/if.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <net/if_ether.h>
47 #include <net/if_media.h>
48
49 #include <uvm/uvm_extern.h>
50
51 #include <machine/autoconf.h>
52 #include <sys/cpu.h>
53 #include <sys/bus.h>
54
55 #include <dev/ic/i82586reg.h>
56 #include <dev/ic/i82586var.h>
57
58 #include <dev/mvme/if_iereg.h>
59 #include <dev/mvme/pcctwovar.h>
60 #include <dev/mvme/pcctworeg.h>
61
62
63 int ie_pcctwo_match(struct device *, struct cfdata *, void *);
64 void ie_pcctwo_attach(struct device *, struct device *, void *);
65
66 struct ie_pcctwo_softc {
67 struct ie_softc ps_ie;
68 bus_space_tag_t ps_bust;
69 bus_space_handle_t ps_bush;
70 struct evcnt ps_evcnt;
71 };
72
73 CFATTACH_DECL(ie_pcctwo, sizeof(struct ie_pcctwo_softc),
74 ie_pcctwo_match, ie_pcctwo_attach, NULL, NULL);
75
76 extern struct cfdriver ie_cd;
77
78
79 /* Functions required by the i82586 MI driver */
80 static void ie_reset(struct ie_softc *, int);
81 static int ie_intrhook(struct ie_softc *, int);
82 static void ie_hwinit(struct ie_softc *);
83 static void ie_atten(struct ie_softc *, int);
84
85 static void ie_copyin(struct ie_softc *, void *, int, size_t);
86 static void ie_copyout(struct ie_softc *, const void *, int, size_t);
87
88 static u_int16_t ie_read_16(struct ie_softc *, int);
89 static void ie_write_16(struct ie_softc *, int, u_int16_t);
90 static void ie_write_24(struct ie_softc *, int, int);
91
92 /*
93 * i82596 Support Routines for MVME1[67][27] and MVME187 Boards
94 */
95 static void
96 ie_reset(sc, why)
97 struct ie_softc *sc;
98 int why;
99 {
100 struct ie_pcctwo_softc *ps;
101 u_int32_t scp_addr;
102
103 ps = (struct ie_pcctwo_softc *) sc;
104
105 switch (why) {
106 case CHIP_PROBE:
107 case CARD_RESET:
108 bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_UPPER,
109 IE_PORT_RESET);
110 bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_LOWER, 0);
111 delay(1000);
112
113 /*
114 * Set the BUSY and BUS_USE bytes here, since the MI code
115 * incorrectly assumes it can use byte addressing to set it.
116 * (due to wrong-endianess of the chip)
117 */
118 ie_write_16(sc, IE_ISCP_BUSY(sc->iscp), 1);
119 ie_write_16(sc, IE_SCP_BUS_USE(sc->scp), IE_BUS_USE);
120
121 scp_addr = sc->scp + (u_int) sc->sc_iobase;
122 scp_addr |= IE_PORT_ALT_SCP;
123
124 bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_UPPER,
125 scp_addr & 0xffff);
126 bus_space_write_2(ps->ps_bust, ps->ps_bush, IE_MPUREG_LOWER,
127 (scp_addr >> 16) & 0xffff);
128 delay(1000);
129 break;
130 }
131 }
132
133 /* ARGSUSED */
134 static int
135 ie_intrhook(sc, when)
136 struct ie_softc *sc;
137 int when;
138 {
139 struct ie_pcctwo_softc *ps;
140 u_int8_t reg;
141
142 ps = (struct ie_pcctwo_softc *) sc;
143
144 if (when == INTR_EXIT) {
145 reg = pcc2_reg_read(sys_pcctwo, PCC2REG_ETH_ICSR);
146 reg |= PCCTWO_ICR_ICLR;
147 pcc2_reg_write(sys_pcctwo, PCC2REG_ETH_ICSR, reg);
148 }
149 return (0);
150 }
151
152 /* ARGSUSED */
153 static void
154 ie_hwinit(sc)
155 struct ie_softc *sc;
156 {
157 u_int8_t reg;
158
159 reg = pcc2_reg_read(sys_pcctwo, PCC2REG_ETH_ICSR);
160 reg |= PCCTWO_ICR_IEN | PCCTWO_ICR_ICLR;
161 pcc2_reg_write(sys_pcctwo, PCC2REG_ETH_ICSR, reg);
162 }
163
164 /* ARGSUSED */
165 static void
166 ie_atten(sc, reason)
167 struct ie_softc *sc;
168 int reason;
169 {
170 struct ie_pcctwo_softc *ps;
171
172 ps = (struct ie_pcctwo_softc *) sc;
173 bus_space_write_4(ps->ps_bust, ps->ps_bush, IE_MPUREG_CA, 0);
174 }
175
176 static void
177 ie_copyin(sc, dst, offset, size)
178 struct ie_softc *sc;
179 void *dst;
180 int offset;
181 size_t size;
182 {
183 if (size == 0) /* This *can* happen! */
184 return;
185
186 #if 0
187 bus_space_read_region_1(sc->bt, sc->bh, offset, dst, size);
188 #else
189 /* A minor optimisation ;-) */
190 memcpy(dst, (void *) ((u_long) sc->bh + (u_long) offset), size);
191 #endif
192 }
193
194 static void
195 ie_copyout(sc, src, offset, size)
196 struct ie_softc *sc;
197 const void *src;
198 int offset;
199 size_t size;
200 {
201 if (size == 0) /* This *can* happen! */
202 return;
203
204 #if 0
205 bus_space_write_region_1(sc->bt, sc->bh, offset, src, size);
206 #else
207 /* A minor optimisation ;-) */
208 memcpy((void *) ((u_long) sc->bh + (u_long) offset), src, size);
209 #endif
210 }
211
212 static u_int16_t
213 ie_read_16(sc, offset)
214 struct ie_softc *sc;
215 int offset;
216 {
217
218 return (bus_space_read_2(sc->bt, sc->bh, offset));
219 }
220
221 static void
222 ie_write_16(sc, offset, value)
223 struct ie_softc *sc;
224 int offset;
225 u_int16_t value;
226 {
227
228 bus_space_write_2(sc->bt, sc->bh, offset, value);
229 }
230
231 static void
232 ie_write_24(sc, offset, addr)
233 struct ie_softc *sc;
234 int offset;
235 int addr;
236 {
237
238 addr += (int) sc->sc_iobase;
239
240 bus_space_write_2(sc->bt, sc->bh, offset, addr & 0xffff);
241 bus_space_write_2(sc->bt, sc->bh, offset + 2, (addr >> 16) & 0x00ff);
242 }
243
244 /* ARGSUSED */
245 int
246 ie_pcctwo_match(parent, cf, args)
247 struct device *parent;
248 struct cfdata *cf;
249 void *args;
250 {
251 struct pcctwo_attach_args *pa;
252
253 pa = args;
254
255 if (strcmp(pa->pa_name, ie_cd.cd_name))
256 return (0);
257
258 pa->pa_ipl = cf->pcctwocf_ipl;
259
260 return (1);
261 }
262
263 /* ARGSUSED */
264 void
265 ie_pcctwo_attach(parent, self, args)
266 struct device *parent;
267 struct device *self;
268 void *args;
269 {
270 struct pcctwo_attach_args *pa;
271 struct ie_pcctwo_softc *ps;
272 struct ie_softc *sc;
273 bus_dma_segment_t seg;
274 int rseg;
275
276 pa = (struct pcctwo_attach_args *) args;
277 ps = device_private(self);
278 sc = device_private(self);
279
280 /* Map the MPU controller registers in PCCTWO space */
281 ps->ps_bust = pa->pa_bust;
282 bus_space_map(pa->pa_bust, pa->pa_offset, IE_MPUREG_SIZE,
283 0, &ps->ps_bush);
284
285 /* Get contiguous DMA-able memory for the IE chip */
286 if (bus_dmamem_alloc(pa->pa_dmat, ether_data_buff_size, PAGE_SIZE, 0,
287 &seg, 1, &rseg,
288 BUS_DMA_NOWAIT | BUS_DMA_ONBOARD_RAM | BUS_DMA_24BIT) != 0) {
289 aprint_error_dev(self, "Failed to allocate ether buffer\n");
290 return;
291 }
292 if (bus_dmamem_map(pa->pa_dmat, &seg, rseg, ether_data_buff_size,
293 (void **) & sc->sc_maddr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) {
294 aprint_error_dev(self, "Failed to map ether buffer\n");
295 bus_dmamem_free(pa->pa_dmat, &seg, rseg);
296 return;
297 }
298 sc->bt = pa->pa_bust;
299 sc->bh = (bus_space_handle_t) sc->sc_maddr; /* XXXSCW Better way? */
300 sc->sc_iobase = (void *) seg.ds_addr;
301 sc->sc_msize = ether_data_buff_size;
302 memset(sc->sc_maddr, 0, ether_data_buff_size);
303
304 sc->hwreset = ie_reset;
305 sc->hwinit = ie_hwinit;
306 sc->chan_attn = ie_atten;
307 sc->intrhook = ie_intrhook;
308 sc->memcopyin = ie_copyin;
309 sc->memcopyout = ie_copyout;
310 sc->ie_bus_barrier = NULL;
311 sc->ie_bus_read16 = ie_read_16;
312 sc->ie_bus_write16 = ie_write_16;
313 sc->ie_bus_write24 = ie_write_24;
314 sc->sc_mediachange = NULL;
315 sc->sc_mediastatus = NULL;
316
317 sc->scp = 0;
318 sc->iscp = sc->scp + ((IE_SCP_SZ + 15) & ~15);
319 sc->scb = sc->iscp + IE_ISCP_SZ;
320 sc->buf_area = sc->scb + IE_SCB_SZ;
321 sc->buf_area_sz = sc->sc_msize - (sc->buf_area - sc->scp);
322
323 /*
324 * BUS_USE -> Interrupt Active High (edge-triggered),
325 * Lock function enabled,
326 * Internal bus throttle timer triggering,
327 * 82586 operating mode.
328 */
329 ie_write_16(sc, IE_SCP_BUS_USE(sc->scp), IE_BUS_USE);
330 ie_write_24(sc, IE_SCP_ISCP(sc->scp), sc->iscp);
331 ie_write_16(sc, IE_ISCP_SCB(sc->iscp), sc->scb);
332 ie_write_24(sc, IE_ISCP_BASE(sc->iscp), sc->scp);
333
334 /* This has the side-effect of resetting the chip */
335 i82586_proberam(sc);
336
337 /* Attach the MI back-end */
338 i82586_attach(sc, "onboard", mvme_ea, NULL, 0, 0);
339
340 /* Register the event counter */
341 evcnt_attach_dynamic(&ps->ps_evcnt, EVCNT_TYPE_INTR,
342 pcctwointr_evcnt(pa->pa_ipl), "ether", device_xname(&sc->sc_dev));
343
344 /* Finally, hook the hardware interrupt */
345 pcctwointr_establish(PCCTWOV_LANC_IRQ, i82586_intr, pa->pa_ipl, sc,
346 &ps->ps_evcnt);
347 }
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