Annotation of sys/dev/sbus/if_le_ledma.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: if_le_ledma.c,v 1.13 2007/05/31 17:23:14 sobrado Exp $ */
2: /* $NetBSD: if_le_ledma.c,v 1.14 2001/05/30 11:46:35 mrg Exp $ */
3:
4: /*-
5: * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
10: * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: #include "bpfilter.h"
42:
43: #include <sys/param.h>
44: #include <sys/systm.h>
45: #include <sys/mbuf.h>
46: #include <sys/syslog.h>
47: #include <sys/socket.h>
48: #include <sys/device.h>
49: #include <sys/malloc.h>
50:
51: #include <net/if.h>
52: #include <net/if_media.h>
53:
54: #ifdef INET
55: #include <netinet/in.h>
56: #include <netinet/if_ether.h>
57: #endif
58:
59: #include <machine/bus.h>
60: #include <machine/intr.h>
61: #include <machine/autoconf.h>
62:
63: #include <dev/sbus/sbusvar.h>
64:
65: #include <dev/ic/lsi64854reg.h>
66: #include <dev/ic/lsi64854var.h>
67:
68: #include <dev/ic/am7990reg.h>
69: #include <dev/ic/am7990var.h>
70:
71: /*
72: * LANCE registers.
73: */
74: #define LEREG1_RDP 0 /* Register Data port */
75: #define LEREG1_RAP 2 /* Register Address port */
76:
77: struct le_softc {
78: struct am7990_softc sc_am7990; /* glue to MI code */
79: bus_space_tag_t sc_bustag;
80: bus_dmamap_t sc_dmamap;
81: bus_space_handle_t sc_reg; /* LANCE registers */
82: struct lsi64854_softc *sc_dma; /* pointer to my dma */
83: u_int sc_laddr; /* LANCE DMA address */
84: };
85:
86: #define MEMSIZE (16*1024) /* LANCE memory size */
87: #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
88:
89: int lematch_ledma(struct device *, void *, void *);
90: void leattach_ledma(struct device *, struct device *, void *);
91:
92: /*
93: * Media types supported by the Sun4m.
94: */
95:
96: void le_ledma_setutp(struct am7990_softc *);
97: void le_ledma_setaui(struct am7990_softc *);
98:
99: int lemediachange(struct ifnet *);
100: void lemediastatus(struct ifnet *, struct ifmediareq *);
101:
102: struct cfattach le_ledma_ca = {
103: sizeof(struct le_softc), lematch_ledma, leattach_ledma
104: };
105:
106: void le_ledma_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
107: u_int16_t le_ledma_rdcsr(struct am7990_softc *, u_int16_t);
108: void le_ledma_hwreset(struct am7990_softc *);
109: void le_ledma_hwinit(struct am7990_softc *);
110: void le_ledma_nocarrier(struct am7990_softc *);
111:
112: void
113: le_ledma_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
114: {
115: struct le_softc *lesc = (struct le_softc *)sc;
116:
117: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
118: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
119: BUS_SPACE_BARRIER_WRITE);
120: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val);
121: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, 2,
122: BUS_SPACE_BARRIER_WRITE);
123:
124: #if defined(SUN4M)
125: /*
126: * We need to flush the SBus->MBus write buffers. This can most
127: * easily be accomplished by reading back the register that we
128: * just wrote (thanks to Chris Torek for this solution).
129: */
130: if (CPU_ISSUN4M) {
131: volatile u_int16_t discard;
132: discard = bus_space_read_2(lesc->sc_bustag, lesc->sc_reg,
133: LEREG1_RDP);
134: }
135: #endif
136: }
137:
138: u_int16_t
139: le_ledma_rdcsr(struct am7990_softc *sc, u_int16_t port)
140: {
141: struct le_softc *lesc = (struct le_softc *)sc;
142:
143: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
144: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
145: BUS_SPACE_BARRIER_WRITE);
146: return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP));
147: }
148:
149: void
150: le_ledma_setutp(struct am7990_softc *sc)
151: {
152: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
153: u_int32_t csr;
154:
155: csr = L64854_GCSR(dma);
156: csr |= E_TP_AUI;
157: L64854_SCSR(dma, csr);
158: delay(20000); /* must not touch le for 20ms */
159: }
160:
161: void
162: le_ledma_setaui(struct am7990_softc *sc)
163: {
164: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
165: u_int32_t csr;
166:
167: csr = L64854_GCSR(dma);
168: csr &= ~E_TP_AUI;
169: L64854_SCSR(dma, csr);
170: delay(20000); /* must not touch le for 20ms */
171: }
172:
173: int
174: lemediachange(struct ifnet *ifp)
175: {
176: struct am7990_softc *sc = ifp->if_softc;
177: struct ifmedia *ifm = &sc->sc_ifmedia;
178:
179: if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
180: return (EINVAL);
181:
182: /*
183: * Switch to the selected media. If autoselect is
184: * set, we don't really have to do anything. We'll
185: * switch to the other media when we detect loss of
186: * carrier.
187: */
188: switch (IFM_SUBTYPE(ifm->ifm_media)) {
189: case IFM_10_T:
190: le_ledma_setutp(sc);
191: break;
192:
193: case IFM_10_5:
194: le_ledma_setaui(sc);
195: break;
196:
197: case IFM_AUTO:
198: break;
199:
200: default:
201: return (EINVAL);
202: }
203:
204: return (0);
205: }
206:
207: void
208: lemediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
209: {
210: struct am7990_softc *sc = ifp->if_softc;
211: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
212:
213: /*
214: * Notify the world which media we're currently using.
215: */
216: if (L64854_GCSR(dma) & E_TP_AUI)
217: ifmr->ifm_active = IFM_ETHER|IFM_10_T;
218: else
219: ifmr->ifm_active = IFM_ETHER|IFM_10_5;
220: }
221:
222: void
223: le_ledma_hwreset(struct am7990_softc *sc)
224: {
225: struct le_softc *lesc = (struct le_softc *)sc;
226: struct lsi64854_softc *dma = lesc->sc_dma;
227: u_int32_t csr;
228: u_int aui_bit;
229:
230: /*
231: * Reset DMA channel.
232: */
233: csr = L64854_GCSR(dma);
234: aui_bit = csr & E_TP_AUI;
235: DMA_RESET(dma);
236:
237: /* Write bits 24-31 of Lance address */
238: bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR,
239: lesc->sc_laddr & 0xff000000);
240:
241: DMA_ENINTR(dma);
242:
243: /*
244: * Disable E-cache invalidates on chip writes.
245: * Retain previous cable selection bit.
246: */
247: csr = L64854_GCSR(dma);
248: csr |= (E_DSBL_WR_INVAL | aui_bit);
249: L64854_SCSR(dma, csr);
250: delay(20000); /* must not touch le for 20ms */
251: }
252:
253: void
254: le_ledma_hwinit(struct am7990_softc *sc)
255: {
256:
257: /*
258: * Make sure we're using the currently-enabled media type.
259: * XXX Actually, this is probably unnecessary, now.
260: */
261: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_cur->ifm_media)) {
262: case IFM_10_T:
263: le_ledma_setutp(sc);
264: break;
265:
266: case IFM_10_5:
267: le_ledma_setaui(sc);
268: break;
269: }
270: }
271:
272: void
273: le_ledma_nocarrier(struct am7990_softc *sc)
274: {
275: struct le_softc *lesc = (struct le_softc *)sc;
276:
277: /*
278: * Check if the user has requested a certain cable type, and
279: * if so, honor that request.
280: */
281:
282: if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
283: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_media)) {
284: case IFM_10_5:
285: case IFM_AUTO:
286: printf("%s: lost carrier on UTP port"
287: ", switching to AUI port\n", sc->sc_dev.dv_xname);
288: le_ledma_setaui(sc);
289: }
290: } else {
291: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_media)) {
292: case IFM_10_T:
293: case IFM_AUTO:
294: printf("%s: lost carrier on AUI port"
295: ", switching to UTP port\n", sc->sc_dev.dv_xname);
296: le_ledma_setutp(sc);
297: }
298: }
299: }
300:
301: int
302: lematch_ledma(struct device *parent, void *vcf, void *aux)
303: {
304: struct cfdata *cf = vcf;
305: struct sbus_attach_args *sa = aux;
306:
307: return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
308: }
309:
310:
311: void
312: leattach_ledma(struct device *parent, struct device *self, void *aux)
313: {
314: struct sbus_attach_args *sa = aux;
315: struct le_softc *lesc = (struct le_softc *)self;
316: struct lsi64854_softc *lsi = (struct lsi64854_softc *)parent;
317: struct am7990_softc *sc = &lesc->sc_am7990;
318: bus_dma_tag_t dmatag = sa->sa_dmatag;
319: bus_dma_segment_t seg;
320: int rseg, error;
321: /* XXX the following declarations should be elsewhere */
322: extern void myetheraddr(u_char *);
323:
324: lesc->sc_bustag = sa->sa_bustag;
325:
326: /* Establish link to `ledma' device */
327: lesc->sc_dma = lsi;
328: lesc->sc_dma->sc_client = lesc;
329:
330: /* Map device registers */
331: if (sbus_bus_map(sa->sa_bustag,
332: sa->sa_slot,
333: sa->sa_offset,
334: sa->sa_size,
335: BUS_SPACE_MAP_LINEAR,
336: 0, &lesc->sc_reg) != 0) {
337: printf("%s @ ledma: cannot map registers\n", self->dv_xname);
338: return;
339: }
340:
341: /* Allocate buffer memory */
342: sc->sc_memsize = MEMSIZE;
343:
344: /* Get a DMA handle */
345: if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE,
346: LEDMA_BOUNDARY, BUS_DMA_NOWAIT,
347: &lesc->sc_dmamap)) != 0) {
348: printf("%s: DMA map create error %d\n", self->dv_xname, error);
349: return;
350: }
351:
352: /* Allocate DMA buffer */
353: if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY,
354: &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
355: printf("%s @ ledma: DMA buffer alloc error %d\n",
356: self->dv_xname, error);
357: return;
358: }
359:
360: /* Map DMA buffer into kernel space */
361: if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
362: (caddr_t *)&sc->sc_mem,
363: BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
364: printf("%s @ ledma: DMA buffer map error %d\n",
365: self->dv_xname, error);
366: bus_dmamem_free(dmatag, &seg, rseg);
367: return;
368: }
369:
370: /* Load DMA buffer */
371: if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
372: MEMSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
373: printf("%s: DMA buffer map load error %d\n",
374: self->dv_xname, error);
375: bus_dmamem_free(dmatag, &seg, rseg);
376: bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
377: return;
378: }
379:
380: lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr;
381: sc->sc_addr = lesc->sc_laddr & 0xffffff;
382: sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
383:
384: ifmedia_init(&sc->sc_ifmedia, 0, lemediachange, lemediastatus);
385: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_10_T, 0, NULL);
386: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_10_5, 0, NULL);
387: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
388: ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO);
389: sc->sc_hasifmedia = 1;
390:
391: myetheraddr(sc->sc_arpcom.ac_enaddr);
392:
393: sc->sc_copytodesc = am7990_copytobuf_contig;
394: sc->sc_copyfromdesc = am7990_copyfrombuf_contig;
395: sc->sc_copytobuf = am7990_copytobuf_contig;
396: sc->sc_copyfrombuf = am7990_copyfrombuf_contig;
397: sc->sc_zerobuf = am7990_zerobuf_contig;
398:
399: sc->sc_rdcsr = le_ledma_rdcsr;
400: sc->sc_wrcsr = le_ledma_wrcsr;
401: sc->sc_hwinit = le_ledma_hwinit;
402: sc->sc_nocarrier = le_ledma_nocarrier;
403: sc->sc_hwreset = le_ledma_hwreset;
404:
405: /* Establish interrupt handler */
406: if (sa->sa_nintr != 0)
407: (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET, 0,
408: am7990_intr, sc, self->dv_xname);
409:
410: am7990_config(&lesc->sc_am7990);
411:
412: /* now initialize DMA */
413: le_ledma_hwreset(sc);
414: }
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