csc.c revision 1.13.78.1 1 /* $NetBSD: csc.c,v 1.13.78.1 2008/05/18 12:31:19 yamt 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 Scott Stevens.
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 * Cumana SCSI-2 driver uses the SFAS216 generic driver
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: csc.c,v 1.13.78.1 2008/05/18 12:31:19 yamt Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/device.h>
43
44 #include <uvm/uvm_extern.h>
45
46 #include <dev/scsipi/scsi_all.h>
47 #include <dev/scsipi/scsipi_all.h>
48 #include <dev/scsipi/scsiconf.h>
49 #include <machine/io.h>
50 #include <machine/intr.h>
51 #include <machine/bootconfig.h>
52 #include <acorn32/podulebus/podulebus.h>
53 #include <acorn32/podulebus/sfasreg.h>
54 #include <acorn32/podulebus/sfasvar.h>
55 #include <acorn32/podulebus/cscreg.h>
56 #include <acorn32/podulebus/cscvar.h>
57 #include <dev/podulebus/podules.h>
58 #include <dev/podulebus/powerromreg.h>
59
60 int cscmatch(struct device *, struct cfdata *, void *);
61 void cscattach(struct device *, struct device *, void *);
62
63 CFATTACH_DECL(csc, sizeof(struct csc_softc),
64 cscmatch, cscattach, NULL, NULL);
65
66 int csc_intr(void *);
67 int csc_setup_dma(void *, void *, int, int);
68 int csc_build_dma_chain(void *, void *, void *, int);
69 int csc_need_bump(void *, void *, int);
70 void csc_led(void *, int);
71
72 void csc_set_dma_adr(struct sfas_softc *, void *);
73 void csc_set_dma_tc(struct sfas_softc *, unsigned int);
74 void csc_set_dma_mode(struct sfas_softc *, int);
75
76 /*
77 * if we are a Cumana SCSI-2 card
78 */
79 int
80 cscmatch(pdp, cf, auxp)
81 struct device *pdp;
82 struct cfdata *cf;
83 void *auxp;
84 {
85 struct podule_attach_args *pa = (struct podule_attach_args *)auxp;
86
87 /* Look for the card */
88 if (pa->pa_product == PODULE_CUMANA_SCSI2)
89 return 1;
90
91 /* PowerROM */
92 if (pa->pa_product == PODULE_ALSYSTEMS_SCSI &&
93 podulebus_initloader(pa) == 0 &&
94 podloader_callloader(pa, 0, 0) == PRID_CUMANA_SCSI2)
95 return 1;
96
97 return 0;
98 }
99
100 void
101 cscattach(pdp, dp, auxp)
102 struct device *pdp;
103 struct device *dp;
104 void *auxp;
105 {
106 struct csc_softc *sc = (struct csc_softc *)dp;
107 struct podule_attach_args *pa;
108 csc_regmap_p rp = &sc->sc_regmap;
109 vu_char *fas;
110 int loop;
111
112 pa = (struct podule_attach_args *)auxp;
113
114 if (pa->pa_podule_number == -1)
115 panic("Podule has disappeared !");
116
117 sc->sc_specific.sc_podule_number = pa->pa_podule_number;
118 sc->sc_specific.sc_podule = pa->pa_podule;
119 sc->sc_specific.sc_iobase =
120 (vu_char *)sc->sc_specific.sc_podule->mod_base;
121
122 rp->status0 = &sc->sc_specific.sc_iobase[CSC_STATUS0];
123 rp->alatch = &sc->sc_specific.sc_iobase[CSC_ALATCH];
124 rp->dack = (vu_short *)&sc->sc_specific.sc_iobase[CSC_DACK];
125 fas = &sc->sc_specific.sc_iobase[CSC_FAS_OFFSET_BASE];
126
127 rp->FAS216.sfas_tc_low = &fas[CSC_FAS_OFFSET_TCL];
128 rp->FAS216.sfas_tc_mid = &fas[CSC_FAS_OFFSET_TCM];
129 rp->FAS216.sfas_fifo = &fas[CSC_FAS_OFFSET_FIFO];
130 rp->FAS216.sfas_command = &fas[CSC_FAS_OFFSET_COMMAND];
131 rp->FAS216.sfas_dest_id = &fas[CSC_FAS_OFFSET_DESTID];
132 rp->FAS216.sfas_timeout = &fas[CSC_FAS_OFFSET_TIMEOUT];
133 rp->FAS216.sfas_syncper = &fas[CSC_FAS_OFFSET_PERIOD];
134 rp->FAS216.sfas_syncoff = &fas[CSC_FAS_OFFSET_OFFSET];
135 rp->FAS216.sfas_config1 = &fas[CSC_FAS_OFFSET_CONFIG1];
136 rp->FAS216.sfas_clkconv = &fas[CSC_FAS_OFFSET_CLKCONV];
137 rp->FAS216.sfas_test = &fas[CSC_FAS_OFFSET_TEST];
138 rp->FAS216.sfas_config2 = &fas[CSC_FAS_OFFSET_CONFIG2];
139 rp->FAS216.sfas_config3 = &fas[CSC_FAS_OFFSET_CONFIG3];
140 rp->FAS216.sfas_tc_high = &fas[CSC_FAS_OFFSET_TCH];
141 rp->FAS216.sfas_fifo_bot = &fas[CSC_FAS_OFFSET_FIFOBOT];
142
143 sc->sc_softc.sc_fas = (sfas_regmap_p)rp;
144 sc->sc_softc.sc_spec = &sc->sc_specific;
145
146 sc->sc_softc.sc_led = csc_led;
147
148 sc->sc_softc.sc_setup_dma = csc_setup_dma;
149 sc->sc_softc.sc_build_dma_chain = csc_build_dma_chain;
150 sc->sc_softc.sc_need_bump = csc_need_bump;
151
152 sc->sc_softc.sc_clock_freq = 8; /* Cumana runs at 8MHz */
153 sc->sc_softc.sc_timeout = 250; /* Set default timeout to 250ms */
154 sc->sc_softc.sc_config_flags = SFAS_NO_DMA /*| SFAS_NF_DEBUG*/;
155 sc->sc_softc.sc_host_id = 7; /* Should check the jumpers */
156
157 sc->sc_softc.sc_bump_sz = PAGE_SIZE;
158 sc->sc_softc.sc_bump_pa = 0x0;
159
160 sfasinitialize((struct sfas_softc *)sc);
161
162 sc->sc_softc.sc_adapter.adapt_dev = &sc->sc_softc.sc_dev;
163 sc->sc_softc.sc_adapter.adapt_nchannels = 1;
164 sc->sc_softc.sc_adapter.adapt_openings = 7;
165 sc->sc_softc.sc_adapter.adapt_max_periph = 1;
166 sc->sc_softc.sc_adapter.adapt_ioctl = NULL;
167 sc->sc_softc.sc_adapter.adapt_minphys = sfas_minphys;
168 sc->sc_softc.sc_adapter.adapt_request = sfas_scsi_request;
169
170 sc->sc_softc.sc_channel.chan_adapter = &sc->sc_softc.sc_adapter;
171 sc->sc_softc.sc_channel.chan_bustype = &scsi_bustype;
172 sc->sc_softc.sc_channel.chan_channel = 0;
173 sc->sc_softc.sc_channel.chan_ntargets = 8;
174 sc->sc_softc.sc_channel.chan_nluns = 8;
175 sc->sc_softc.sc_channel.chan_id = sc->sc_softc.sc_host_id;
176
177 /* Provide an override for the host id */
178 (void)get_bootconf_option(boot_args, "csc.hostid",
179 BOOTOPT_TYPE_INT, &sc->sc_softc.sc_channel.chan_id);
180
181 printf(": host=%d", sc->sc_softc.sc_channel.chan_id);
182
183 /* initialise the alatch */
184 sc->sc_specific.sc_alatch_defs = (CSC_POLL?0:CSC_ALATCH_DEFS_INTEN);
185 for (loop = 0; loop < 8; loop ++) {
186 if(loop != 3)
187 *rp->alatch = (loop << 1) |
188 ((sc->sc_specific.sc_alatch_defs & (1 << loop))?1:0);
189 }
190
191 #if CSC_POLL == 0
192 evcnt_attach_dynamic(&sc->sc_softc.sc_intrcnt, EVCNT_TYPE_INTR, NULL,
193 dp->dv_xname, "intr");
194 sc->sc_softc.sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_BIO,
195 csc_intr, &sc->sc_softc, &sc->sc_softc.sc_intrcnt);
196 if (sc->sc_softc.sc_ih == NULL)
197 panic("%s: Cannot install IRQ handler", dp->dv_xname);
198 #else
199 printf(" polling");
200 sc->sc_softc.sc_adapter.adapt_flags |= SCSIPI_ADAPT_POLL_ONLY;
201 #endif
202 printf("\n");
203
204 /* attach all scsi units on us */
205 config_found(dp, &sc->sc_softc.sc_channel, scsiprint);
206 }
207
208
209 int
210 csc_intr(arg)
211 void *arg;
212 {
213 struct sfas_softc *dev = arg;
214 csc_regmap_p rp;
215 int quickints;
216
217 rp = (csc_regmap_p)dev->sc_fas;
218
219 if (*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING) {
220 quickints = 16;
221 do {
222 dev->sc_status = *rp->FAS216.sfas_status;
223 dev->sc_interrupt = *rp->FAS216.sfas_interrupt;
224
225 if (dev->sc_interrupt & SFAS_INT_RESELECTED) {
226 dev->sc_resel[0] = *rp->FAS216.sfas_fifo;
227 dev->sc_resel[1] = *rp->FAS216.sfas_fifo;
228 }
229 sfasintr(dev);
230
231 } while((*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING)
232 && --quickints);
233 }
234
235 return(0); /* Pass interrupt on down the chain */
236 }
237
238 /* Load transfer address into DMA register */
239 void
240 csc_set_dma_adr(sc, ptr)
241 struct sfas_softc *sc;
242 void *ptr;
243 {
244 return;
245 }
246
247 /* Set DMA transfer counter */
248 void
249 csc_set_dma_tc(sc, len)
250 struct sfas_softc *sc;
251 unsigned int len;
252 {
253 *sc->sc_fas->sfas_tc_low = len; len >>= 8;
254 *sc->sc_fas->sfas_tc_mid = len; len >>= 8;
255 *sc->sc_fas->sfas_tc_high = len;
256 }
257
258 /* Set DMA mode */
259 void
260 csc_set_dma_mode(sc, mode)
261 struct sfas_softc *sc;
262 int mode;
263 {
264 }
265
266 /* Initialize DMA for transfer */
267 int
268 csc_setup_dma(sc, ptr, len, mode)
269 void *sc;
270 void *ptr;
271 int len;
272 int mode;
273 {
274
275 return (0);
276 }
277
278 /* Check if address and len is ok for DMA transfer */
279 int
280 csc_need_bump(sc, ptr, len)
281 void *sc;
282 void *ptr;
283 int len;
284 {
285 int p;
286
287 p = (int)ptr & 0x03;
288
289 if (p) {
290 p = 4-p;
291
292 if (len < 256)
293 p = len;
294 }
295
296 return(p);
297 }
298
299 /* Interrupt driven routines */
300 int
301 csc_build_dma_chain(sc, chain, p, l)
302 void *sc;
303 void *chain;
304 void *p;
305 int l;
306 {
307 return(0);
308 }
309
310 /* Turn on/off led */
311 void
312 csc_led(v, mode)
313 void *v;
314 int mode;
315 {
316 struct sfas_softc *sc = v;
317 csc_regmap_p rp;
318
319 rp = (csc_regmap_p)sc->sc_fas;
320
321 if (mode) {
322 sc->sc_led_status++;
323 } else {
324 if (sc->sc_led_status)
325 sc->sc_led_status--;
326 }
327 }
328