1 /* $NetBSD: qec.c,v 1.50 2009/09/19 11:53:42 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
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: qec.c,v 1.50 2009/09/19 11:53:42 tsutsui Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/errno.h>
39 #include <sys/device.h>
40 #include <sys/malloc.h>
41
42 #include <sys/bus.h>
43 #include <sys/intr.h>
44 #include <machine/autoconf.h>
45
46 #include <dev/sbus/sbusvar.h>
47 #include <dev/sbus/qecreg.h>
48 #include <dev/sbus/qecvar.h>
49
50 static int qecprint(void *, const char *);
51 static int qecmatch(device_t, cfdata_t, void *);
52 static void qecattach(device_t, device_t, void *);
53 void qec_init(struct qec_softc *);
54
55 static int qec_bus_map(
56 bus_space_tag_t,
57 bus_addr_t, /*coded slot+offset*/
58 bus_size_t, /*size*/
59 int, /*flags*/
60 vaddr_t, /*preferred virtual address */
61 bus_space_handle_t *);
62 static void *qec_intr_establish(
63 bus_space_tag_t,
64 int, /*bus interrupt priority*/
65 int, /*`device class' interrupt level*/
66 int (*)(void *), /*handler*/
67 void *, /*arg*/
68 void (*)(void)); /*optional fast trap handler*/
69
70 CFATTACH_DECL_NEW(qec, sizeof(struct qec_softc),
71 qecmatch, qecattach, NULL, NULL);
72
73 int
qecprint(void * aux,const char * busname)74 qecprint(void *aux, const char *busname)
75 {
76 struct sbus_attach_args *sa = aux;
77 bus_space_tag_t t = sa->sa_bustag;
78 struct qec_softc *sc = t->cookie;
79
80 sa->sa_bustag = sc->sc_bustag; /* XXX */
81 sbus_print(aux, busname); /* XXX */
82 sa->sa_bustag = t; /* XXX */
83 return (UNCONF);
84 }
85
86 int
qecmatch(device_t parent,cfdata_t cf,void * aux)87 qecmatch(device_t parent, cfdata_t cf, void *aux)
88 {
89 struct sbus_attach_args *sa = aux;
90
91 return (strcmp(cf->cf_name, sa->sa_name) == 0);
92 }
93
94 /*
95 * Attach all the sub-devices we can find
96 */
97 void
qecattach(device_t parent,device_t self,void * aux)98 qecattach(device_t parent, device_t self, void *aux)
99 {
100 struct sbus_attach_args *sa = aux;
101 struct qec_softc *sc = device_private(self);
102 struct sbus_softc *sbsc = device_private(parent);
103 int node;
104 int sbusburst;
105 bus_space_tag_t sbt;
106 bus_space_handle_t bh;
107 int error;
108
109 sc->sc_dev = self;
110 sc->sc_bustag = sa->sa_bustag;
111 sc->sc_dmatag = sa->sa_dmatag;
112 node = sa->sa_node;
113
114 if (sa->sa_nreg < 2) {
115 printf("%s: only %d register sets\n",
116 device_xname(self), sa->sa_nreg);
117 return;
118 }
119
120 if (sbus_bus_map(sa->sa_bustag,
121 sa->sa_reg[0].oa_space,
122 sa->sa_reg[0].oa_base,
123 sa->sa_reg[0].oa_size,
124 0, &sc->sc_regs) != 0) {
125 aprint_error_dev(self, "attach: cannot map registers\n");
126 return;
127 }
128
129 /*
130 * This device's "register space 1" is just a buffer where the
131 * Lance ring-buffers can be stored. Note the buffer's location
132 * and size, so the child driver can pick them up.
133 */
134 if (sbus_bus_map(sa->sa_bustag,
135 sa->sa_reg[1].oa_space,
136 sa->sa_reg[1].oa_base,
137 sa->sa_reg[1].oa_size,
138 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
139 aprint_error_dev(self, "attach: cannot map registers\n");
140 return;
141 }
142 sc->sc_buffer = (void *)bus_space_vaddr(sa->sa_bustag, bh);
143 sc->sc_bufsiz = (bus_size_t)sa->sa_reg[1].oa_size;
144
145 /* Get number of on-board channels */
146 sc->sc_nchannels = prom_getpropint(node, "#channels", -1);
147 if (sc->sc_nchannels == -1) {
148 printf(": no channels\n");
149 return;
150 }
151
152 /*
153 * Get transfer burst size from PROM
154 */
155 sbusburst = sbsc->sc_burst;
156 if (sbusburst == 0)
157 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
158
159 sc->sc_burst = prom_getpropint(node, "burst-sizes", -1);
160 if (sc->sc_burst == -1)
161 /* take SBus burst sizes */
162 sc->sc_burst = sbusburst;
163
164 /* Clamp at parent's burst sizes */
165 sc->sc_burst &= sbusburst;
166
167 /* Allocate a bus tag */
168 sbt = bus_space_tag_alloc(sc->sc_bustag, sc);
169 if (sbt == NULL) {
170 aprint_error_dev(self, "attach: out of memory\n");
171 return;
172 }
173
174 sbt->sparc_bus_map = qec_bus_map;
175 sbt->sparc_intr_establish = qec_intr_establish;
176
177 /*
178 * Collect address translations from the OBP.
179 */
180 error = prom_getprop(node, "ranges", sizeof(struct openprom_range),
181 &sbt->nranges, &sbt->ranges);
182 switch (error) {
183 case 0:
184 break;
185 case ENOENT:
186 default:
187 panic("%s: error getting ranges property", device_xname(self));
188 }
189
190 /*
191 * Save interrupt information for use in our qec_intr_establish()
192 * function below. Apparently, the intr level for the quad
193 * ethernet board (qe) is stored in the QEC node rather than
194 * separately in each of the QE nodes.
195 *
196 * XXX - qe.c should call bus_intr_establish() with `level = 0'..
197 * XXX - maybe we should have our own attach args for all that.
198 */
199 sc->sc_intr = sa->sa_intr;
200
201 printf(": %dK memory\n", sc->sc_bufsiz / 1024);
202
203 qec_init(sc);
204
205 /* search through children */
206 for (node = firstchild(node); node; node = nextsibling(node)) {
207 struct sbus_attach_args sax;
208 sbus_setup_attach_args(sbsc,
209 sbt, sc->sc_dmatag, node, &sax);
210 (void)config_found(self, (void *)&sax, qecprint);
211 sbus_destroy_attach_args(&sax);
212 }
213 }
214
215 int
qec_bus_map(bus_space_tag_t t,bus_addr_t ba,bus_size_t size,int flags,vaddr_t va,bus_space_handle_t * hp)216 qec_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags,
217 vaddr_t va, bus_space_handle_t *hp)
218 /* va: Ignored */
219 {
220 int error;
221
222 if ((error = bus_space_translate_address_generic(
223 t->ranges, t->nranges, &ba)) != 0)
224 return (error);
225
226 return (bus_space_map(t->parent, ba, size, flags, hp));
227 }
228
229 void *
qec_intr_establish(bus_space_tag_t t,int pri,int level,int (* handler)(void *),void * arg,void (* fastvec)(void))230 qec_intr_establish(bus_space_tag_t t, int pri, int level,
231 int (*handler)(void *), void *arg, void (*fastvec)(void))
232 /* (*fastvec)(void): ignored */
233 {
234 struct qec_softc *sc = t->cookie;
235
236 if (pri == 0) {
237 /*
238 * qe.c calls bus_intr_establish() with `pri == 0'
239 * XXX - see also comment in qec_attach().
240 */
241 if (sc->sc_intr == NULL) {
242 printf("%s: warning: no interrupts\n",
243 device_xname(sc->sc_dev));
244 return (NULL);
245 }
246 pri = sc->sc_intr->oi_pri;
247 }
248
249 return (bus_intr_establish(t->parent, pri, level, handler, arg));
250 }
251
252 void
qec_init(struct qec_softc * sc)253 qec_init(struct qec_softc *sc)
254 {
255 bus_space_tag_t t = sc->sc_bustag;
256 bus_space_handle_t qr = sc->sc_regs;
257 uint32_t v, burst = 0, psize;
258 int i;
259
260 /* First, reset the controller */
261 bus_space_write_4(t, qr, QEC_QRI_CTRL, QEC_CTRL_RESET);
262 for (i = 0; i < 1000; i++) {
263 DELAY(100);
264 v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
265 if ((v & QEC_CTRL_RESET) == 0)
266 break;
267 }
268
269 /*
270 * Cut available buffer size into receive and transmit buffers.
271 * XXX - should probably be done in be & qe driver...
272 */
273 v = sc->sc_msize = sc->sc_bufsiz / sc->sc_nchannels;
274 bus_space_write_4(t, qr, QEC_QRI_MSIZE, v);
275
276 v = sc->sc_rsize = sc->sc_bufsiz / (sc->sc_nchannels * 2);
277 bus_space_write_4(t, qr, QEC_QRI_RSIZE, v);
278 bus_space_write_4(t, qr, QEC_QRI_TSIZE, v);
279
280 psize = sc->sc_nchannels == 1 ? QEC_PSIZE_2048 : 0;
281 bus_space_write_4(t, qr, QEC_QRI_PSIZE, psize);
282
283 if (sc->sc_burst & SBUS_BURST_64)
284 burst = QEC_CTRL_B64;
285 else if (sc->sc_burst & SBUS_BURST_32)
286 burst = QEC_CTRL_B32;
287 else
288 burst = QEC_CTRL_B16;
289
290 v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
291 v = (v & QEC_CTRL_MODEMASK) | burst;
292 bus_space_write_4(t, qr, QEC_QRI_CTRL, v);
293 }
294
295 /*
296 * Common routine to initialize the QEC packet ring buffer.
297 * Called from be & qe drivers.
298 */
299 void
qec_meminit(struct qec_ring * qr,unsigned int pktbufsz)300 qec_meminit(struct qec_ring *qr, unsigned int pktbufsz)
301 {
302 bus_addr_t txbufdma, rxbufdma;
303 bus_addr_t dma;
304 uint8_t *p;
305 unsigned int ntbuf, nrbuf, i;
306
307 p = qr->rb_membase;
308 dma = qr->rb_dmabase;
309
310 ntbuf = qr->rb_ntbuf;
311 nrbuf = qr->rb_nrbuf;
312
313 /*
314 * Allocate transmit descriptors
315 */
316 qr->rb_txd = (struct qec_xd *)p;
317 qr->rb_txddma = dma;
318 p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
319 dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
320
321 /*
322 * Allocate receive descriptors
323 */
324 qr->rb_rxd = (struct qec_xd *)p;
325 qr->rb_rxddma = dma;
326 p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
327 dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
328
329
330 /*
331 * Allocate transmit buffers
332 */
333 qr->rb_txbuf = p;
334 txbufdma = dma;
335 p += ntbuf * pktbufsz;
336 dma += ntbuf * pktbufsz;
337
338 /*
339 * Allocate receive buffers
340 */
341 qr->rb_rxbuf = p;
342 rxbufdma = dma;
343 p += nrbuf * pktbufsz;
344 dma += nrbuf * pktbufsz;
345
346 /*
347 * Initialize transmit buffer descriptors
348 */
349 for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
350 qr->rb_txd[i].xd_addr =
351 (uint32_t)(txbufdma + (i % ntbuf) * pktbufsz);
352 qr->rb_txd[i].xd_flags = 0;
353 }
354
355 /*
356 * Initialize receive buffer descriptors
357 */
358 for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
359 qr->rb_rxd[i].xd_addr =
360 (uint32_t)(rxbufdma + (i % nrbuf) * pktbufsz);
361 qr->rb_rxd[i].xd_flags = (i < nrbuf)
362 ? QEC_XD_OWN | (pktbufsz & QEC_XD_LENGTH)
363 : 0;
364 }
365
366 qr->rb_tdhead = qr->rb_tdtail = 0;
367 qr->rb_td_nbusy = 0;
368 qr->rb_rdtail = 0;
369 }
370