Annotation of sys/arch/mvme68k/dev/sshdma.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sshdma.c,v 1.14 2006/11/28 23:59:45 dlg Exp $ */
2:
3: /*
4: * Copyright (c) 1995 Theo de Raadt
5: * Copyright (c) 1994 Michael L. Hitch
6: * Copyright (c) 1982, 1990 The Regents of the University of California.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)dma.c
34: */
35:
36: #include <sys/param.h>
37: #include <sys/systm.h>
38: #include <sys/kernel.h>
39: #include <sys/device.h>
40:
41: #include <scsi/scsi_all.h>
42: #include <scsi/scsiconf.h>
43:
44: #include <machine/autoconf.h>
45: #include <mvme68k/dev/sshreg.h>
46: #include <mvme68k/dev/sshvar.h>
47:
48: #include "mc.h"
49: #include "pcctwo.h"
50:
51: #if NMC > 0
52: #include <mvme68k/dev/mcreg.h>
53: #endif
54: #if NPCCTWO > 0
55: #include <mvme68k/dev/pcctworeg.h>
56: #endif
57:
58: int afscmatch(struct device *, void *, void *);
59: void afscattach(struct device *, struct device *, void *);
60:
61: void sshintr(struct ssh_softc *);
62: int afsc_dmaintr(void *);
63:
64: extern void sshinitialize(struct ssh_softc *);
65:
66: struct scsi_adapter afsc_scsiswitch = {
67: ssh_scsicmd,
68: ssh_minphys,
69: 0, /* no lun support */
70: 0, /* no lun support */
71: };
72:
73: struct scsi_device afsc_scsidev = {
74: NULL, /* use default error handler */
75: NULL, /* do not have a start function */
76: NULL, /* have no async handler */
77: NULL, /* Use default done routine */
78: };
79:
80: struct cfattach ssh_ca = {
81: sizeof(struct ssh_softc), afscmatch, afscattach,
82: };
83:
84: struct cfdriver ssh_cd = {
85: NULL, "ssh", DV_DULL
86: };
87:
88: int
89: afscmatch(pdp, vcf, args)
90: struct device *pdp;
91: void *vcf, *args;
92: {
93: struct confargs *ca = args;
94:
95: return (!badvaddr((vaddr_t)ca->ca_vaddr, 4));
96: }
97:
98: void
99: afscattach(parent, self, auxp)
100: struct device *parent, *self;
101: void *auxp;
102: {
103: struct ssh_softc *sc = (struct ssh_softc *)self;
104: struct confargs *ca = auxp;
105: struct scsibus_attach_args saa;
106: ssh_regmap_p rp;
107: int tmp;
108: extern int cpuspeed;
109:
110: sc->sc_sshp = rp = (void *)ca->ca_vaddr;
111: /*
112: * ssh uses sc_clock_freq to define the dcntl & ctest7 reg values
113: * (was 0x0221, but i added SSH_CTEST7_SC0 for snooping control)
114: * XXX does the clock frequency change for the 33MHz processors?
115: */
116: sc->sc_clock_freq = cpuspeed * 2;
117: #ifdef MVME177
118: /* MVME177 ssh clock documented as fixed 50MHz in VME177A/HX */
119: if (cputyp == CPU_177)
120: sc->sc_clock_freq = 50;
121: #endif
122: #ifdef MVME172
123: /* XXX this is a guess! Same as MVME177?*/
124: if (cputyp == CPU_172)
125: sc->sc_clock_freq = 50;
126: #endif
127: sc->sc_dcntl = SSH_DCNTL_EA;
128: /*XXX*/ if (sc->sc_clock_freq <= 25)
129: /*XXX*/ sc->sc_dcntl |= (2 << 6);
130: /*XXX*/ else if (sc->sc_clock_freq <= 37)
131: /*XXX*/ sc->sc_dcntl |= (1 << 6);
132: /*XXX*/ else if (sc->sc_clock_freq <= 50)
133: /*XXX*/ sc->sc_dcntl |= (0 << 6);
134: /*XXX*/ else
135: /*XXX*/ sc->sc_dcntl |= (3 << 6);
136:
137: #if defined(MVME172) || defined(MVME177)
138: /* No Select timouts on MC68060 */
139: /* XXX 177 works better with them! */
140: if (cputyp == CPU_172 /* || cputyp == CPU_177 */)
141: sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1 | SSH_CTEST7_STD;
142: else
143: #endif
144: sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1;
145:
146: sc->sc_link.adapter_softc = sc;
147: sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */
148: sc->sc_link.adapter = &afsc_scsiswitch;
149: sc->sc_link.device = &afsc_scsidev;
150: sc->sc_link.openings = 1;
151:
152: sc->sc_ih.ih_fn = afsc_dmaintr;
153: sc->sc_ih.ih_arg = sc;
154: sc->sc_ih.ih_ipl = ca->ca_ipl;
155:
156: sshinitialize(sc);
157:
158: switch (ca->ca_bustype) {
159: #if NMC > 0
160: case BUS_MC:
161: mcintr_establish(MCV_NCR, &sc->sc_ih, self->dv_xname);
162: sys_mc->mc_ncrirq = ca->ca_ipl | MC_IRQ_IEN;
163: break;
164: #endif
165: #if NPCCTWO > 0
166: case BUS_PCCTWO:
167: pcctwointr_establish(PCC2V_NCR, &sc->sc_ih, self->dv_xname);
168: sys_pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN;
169: break;
170: #endif
171: }
172:
173: /*
174: * attach all scsi units on us, watching for boot device
175: * (see device_register).
176: */
177: tmp = bootpart;
178: if (ca->ca_paddr != bootaddr)
179: bootpart = -1; /* invalid flag to device_register */
180:
181: bzero(&saa, sizeof(saa));
182: saa.saa_sc_link = &sc->sc_link;
183:
184: config_found(self, &saa, scsiprint);
185: bootpart = tmp; /* restore old value */
186:
187: }
188:
189: int
190: afsc_dmaintr(arg)
191: void *arg;
192: {
193: struct ssh_softc *sc = (struct ssh_softc *)arg;
194: ssh_regmap_p rp;
195: u_char istat;
196:
197: rp = sc->sc_sshp;
198: istat = rp->ssh_istat;
199: if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0)
200: return (0);
201: if ((rp->ssh_sien | rp->ssh_dien) == 0)
202: return (0); /* no interrupts enabled */
203:
204: /*
205: * save interrupt status, DMA status, and SCSI status 0
206: * (may need to deal with stacked interrupts?)
207: */
208: sc->sc_istat = istat;
209: sc->sc_dstat = rp->ssh_dstat;
210: sc->sc_sstat0 = rp->ssh_sstat0;
211: sshintr(sc);
212: return (1);
213: }
214:
215: #ifdef DEBUG
216: void
217: afsc_dump()
218: {
219: int i;
220:
221: for (i = 0; i < afsccd.cd_ndevs; ++i)
222: if (afsccd.cd_devs[i])
223: ssh_dump(afsccd.cd_devs[i]);
224: }
225: #endif
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