uha_eisa.c revision 1.1 1 #include <sys/types.h>
2 #include <sys/param.h>
3 #include <sys/device.h>
4 #include <sys/kernel.h>
5 #include <sys/proc.h>
6 #include <sys/user.h>
7
8 #include <machine/bus.h>
9 #include <machine/intr.h>
10
11 #include <scsi/scsi_all.h>
12 #include <scsi/scsiconf.h>
13
14 #include <dev/eisa/eisavar.h>
15 #include <dev/eisa/eisadevs.h>
16
17 #include <dev/ic/uhareg.h>
18 #include <dev/ic/uhavar.h>
19
20 #define UHA_EISA_SLOT_OFFSET 0xc80
21 #define UHA_EISA_IOSIZE 0x020
22
23 int uha_eisa_match __P((struct device *, void *, void *));
24 void uha_eisa_attach __P((struct device *, struct device *, void *));
25
26 struct cfattach uha_eisa_ca = {
27 sizeof(struct uha_softc), uha_eisa_match, uha_eisa_attach
28 };
29
30 #define KVTOPHYS(x) vtophys(x)
31
32 int u24_find __P((bus_chipset_tag_t, bus_io_handle_t, struct uha_softc *));
33 void u24_start_mbox __P((struct uha_softc *, struct uha_mscp *));
34 int u24_poll __P((struct uha_softc *, struct scsi_xfer *, int));
35 int u24_intr __P((void *));
36 void u24_init __P((struct uha_softc *));
37
38 /*
39 * Check the slots looking for a board we recognise
40 * If we find one, note it's address (slot) and call
41 * the actual probe routine to check it out.
42 */
43 int
44 uha_eisa_match(parent, match, aux)
45 struct device *parent;
46 void *match, *aux;
47 {
48 struct eisa_attach_args *ea = aux;
49 bus_chipset_tag_t bc = ea->ea_bc;
50 bus_io_handle_t ioh;
51 int rv;
52
53 /* must match one of our known ID strings */
54 if (strncmp(ea->ea_idstring, "USC024", 6))
55 return (0);
56
57 if (bus_io_map(bc, EISA_SLOT_ADDR(ea->ea_slot) + UHA_EISA_SLOT_OFFSET,
58 UHA_EISA_IOSIZE, &ioh))
59 return (0);
60
61 rv = u24_find(bc, ioh, NULL);
62
63 bus_io_unmap(bc, ioh, UHA_EISA_IOSIZE);
64
65 return (rv);
66 }
67
68 /*
69 * Attach all the sub-devices we can find
70 */
71 void
72 uha_eisa_attach(parent, self, aux)
73 struct device *parent, *self;
74 void *aux;
75 {
76 struct eisa_attach_args *ea = aux;
77 struct uha_softc *sc = (void *)self;
78 bus_chipset_tag_t bc = ea->ea_bc;
79 bus_io_handle_t ioh;
80 eisa_chipset_tag_t ec = ea->ea_ec;
81 eisa_intr_handle_t ih;
82 const char *model, *intrstr;
83
84 if (!strncmp(ea->ea_idstring, "USC024", 6))
85 model = EISA_PRODUCT_USC0240;
86 else
87 model = "unknown model!";
88 printf(": %s\n", model);
89
90 if (bus_io_map(bc, EISA_SLOT_ADDR(ea->ea_slot) + UHA_EISA_SLOT_OFFSET,
91 UHA_EISA_IOSIZE, &ioh))
92 panic("uha_attach: could not map I/O addresses");
93
94 sc->sc_bc = bc;
95 sc->sc_ioh = ioh;
96 if (!u24_find(bc, ioh, sc))
97 panic("uha_attach: u24_find failed!");
98
99 if (eisa_intr_map(ec, sc->sc_irq, &ih)) {
100 printf("%s: couldn't map interrupt (%d)\n",
101 sc->sc_dev.dv_xname, sc->sc_irq);
102 return;
103 }
104 intrstr = eisa_intr_string(ec, ih);
105 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
106 u24_intr, sc);
107 if (sc->sc_ih == NULL) {
108 printf("%s: couldn't establish interrupt",
109 sc->sc_dev.dv_xname);
110 if (intrstr != NULL)
111 printf(" at %s", intrstr);
112 printf("\n");
113 return;
114 }
115 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
116
117 /* Save function pointers for later use. */
118 sc->start_mbox = u24_start_mbox;
119 sc->poll = u24_poll;
120 sc->init = u24_init;
121
122 uha_attach(sc);
123 }
124
125 int
126 u24_find(bc, ioh, sc)
127 bus_chipset_tag_t bc;
128 bus_io_handle_t ioh;
129 struct uha_softc *sc;
130 {
131 u_int8_t config0, config1, config2;
132 int irq, drq;
133 int resetcount = 4000; /* 4 secs? */
134
135 config0 = bus_io_read_1(bc, ioh, U24_CONFIG + 0);
136 config1 = bus_io_read_1(bc, ioh, U24_CONFIG + 1);
137 config2 = bus_io_read_1(bc, ioh, U24_CONFIG + 2);
138 if ((config0 & U24_MAGIC1) == 0 ||
139 (config1 & U24_MAGIC2) == 0)
140 return (0);
141
142 drq = -1;
143
144 switch (config0 & U24_IRQ_MASK) {
145 case U24_IRQ10:
146 irq = 10;
147 break;
148 case U24_IRQ11:
149 irq = 11;
150 break;
151 case U24_IRQ14:
152 irq = 14;
153 break;
154 case U24_IRQ15:
155 irq = 15;
156 break;
157 default:
158 printf("u24_find: illegal irq setting %x\n",
159 config0 & U24_IRQ_MASK);
160 return (0);
161 }
162
163 bus_io_write_1(bc, ioh, U24_LINT, UHA_ASRST);
164
165 while (--resetcount) {
166 if (bus_io_read_1(bc, ioh, U24_LINT))
167 break;
168 delay(1000); /* 1 mSec per loop */
169 }
170 if (!resetcount) {
171 printf("u24_find: board timed out during reset\n");
172 return (0);
173 }
174
175 /* if we want to fill in softc, do so now */
176 if (sc != NULL) {
177 sc->sc_irq = irq;
178 sc->sc_drq = drq;
179 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
180 }
181
182 return (1);
183 }
184
185 void
186 u24_start_mbox(sc, mscp)
187 struct uha_softc *sc;
188 struct uha_mscp *mscp;
189 {
190 bus_chipset_tag_t bc = sc->sc_bc;
191 bus_io_handle_t ioh = sc->sc_ioh;
192 int spincount = 100000; /* 1s should be enough */
193
194 while (--spincount) {
195 if ((bus_io_read_1(bc, ioh, U24_LINT) & U24_LDIP) == 0)
196 break;
197 delay(100);
198 }
199 if (!spincount) {
200 printf("%s: uha_start_mbox, board not responding\n",
201 sc->sc_dev.dv_xname);
202 Debugger();
203 }
204
205 bus_io_write_4(bc, ioh, U24_OGMPTR, KVTOPHYS(mscp));
206 if (mscp->flags & MSCP_ABORT)
207 bus_io_write_1(bc, ioh, U24_OGMCMD, 0x80);
208 else
209 bus_io_write_1(bc, ioh, U24_OGMCMD, 0x01);
210 bus_io_write_1(bc, ioh, U24_LINT, U24_OGMFULL);
211
212 if ((mscp->xs->flags & SCSI_POLL) == 0)
213 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000);
214 }
215
216 int
217 u24_poll(sc, xs, count)
218 struct uha_softc *sc;
219 struct scsi_xfer *xs;
220 int count;
221 {
222 bus_chipset_tag_t bc = sc->sc_bc;
223 bus_io_handle_t ioh = sc->sc_ioh;
224
225 while (count) {
226 /*
227 * If we had interrupts enabled, would we
228 * have got an interrupt?
229 */
230 if (bus_io_read_1(bc, ioh, U24_SINT) & U24_SDIP)
231 u24_intr(sc);
232 if (xs->flags & ITSDONE)
233 return (0);
234 delay(1000);
235 count--;
236 }
237 return (1);
238 }
239
240 int
241 u24_intr(arg)
242 void *arg;
243 {
244 struct uha_softc *sc = arg;
245 bus_chipset_tag_t bc = sc->sc_bc;
246 bus_io_handle_t ioh = sc->sc_ioh;
247 struct uha_mscp *mscp;
248 u_char uhastat;
249 u_long mboxval;
250
251 #ifdef UHADEBUG
252 printf("%s: uhaintr ", sc->sc_dev.dv_xname);
253 #endif /*UHADEBUG */
254
255 if ((bus_io_read_1(bc, ioh, U24_SINT) & U24_SDIP) == 0)
256 return (0);
257
258 for (;;) {
259 /*
260 * First get all the information and then
261 * acknowledge the interrupt
262 */
263 uhastat = bus_io_read_1(bc, ioh, U24_SINT);
264 mboxval = bus_io_read_4(bc, ioh, U24_ICMPTR);
265 bus_io_write_1(bc, ioh, U24_SINT, U24_ICM_ACK);
266 bus_io_write_1(bc, ioh, U24_ICMCMD, 0);
267
268 #ifdef UHADEBUG
269 printf("status = 0x%x ", uhastat);
270 #endif /*UHADEBUG*/
271
272 /*
273 * Process the completed operation
274 */
275 mscp = uha_mscp_phys_kv(sc, mboxval);
276 if (!mscp) {
277 printf("%s: BAD MSCP RETURNED!\n",
278 sc->sc_dev.dv_xname);
279 continue; /* whatever it was, it'll timeout */
280 }
281 untimeout(uha_timeout, mscp);
282 uha_done(sc, mscp);
283
284 if ((bus_io_read_1(bc, ioh, U24_SINT) & U24_SDIP) == 0)
285 return (1);
286 }
287 }
288
289 void
290 u24_init(sc)
291 struct uha_softc *sc;
292 {
293 bus_chipset_tag_t bc = sc->sc_bc;
294 bus_io_handle_t ioh = sc->sc_ioh;
295
296 /* free OGM and ICM */
297 bus_io_write_1(bc, ioh, U24_OGMCMD, 0);
298 bus_io_write_1(bc, ioh, U24_ICMCMD, 0);
299 /* make sure interrupts are enabled */
300 #ifdef UHADEBUG
301 printf("u24_init: lmask=%02x, smask=%02x\n",
302 bus_io_read_1(bc, ioh, U24_LMASK),
303 bus_io_read_1(bc, ioh, U24_SMASK));
304 #endif
305 bus_io_write_1(bc, ioh, U24_LMASK, 0xd2); /* XXX */
306 bus_io_write_1(bc, ioh, U24_SMASK, 0x92); /* XXX */
307 }
308