wdsc.c revision 1.26 1 1.26 bjh21 /* $NetBSD: wdsc.c,v 1.26 2009/01/25 15:23:42 bjh21 Exp $ */
2 1.1 wdk
3 1.1 wdk /*
4 1.1 wdk * Copyright (c) 2001 Wayne Knowles
5 1.1 wdk * All rights reserved.
6 1.1 wdk *
7 1.1 wdk * This code is derived from software contributed to The NetBSD Foundation
8 1.1 wdk * by Wayne Knowles
9 1.1 wdk *
10 1.1 wdk * Redistribution and use in source and binary forms, with or without
11 1.1 wdk * modification, are permitted provided that the following conditions
12 1.1 wdk * are met:
13 1.1 wdk * 1. Redistributions of source code must retain the above copyright
14 1.1 wdk * notice, this list of conditions and the following disclaimer.
15 1.1 wdk * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 wdk * notice, this list of conditions and the following disclaimer in the
17 1.1 wdk * documentation and/or other materials provided with the distribution.
18 1.25 martin * 3. All advertising materials mentioning features or use of this software
19 1.25 martin * must display the following acknowledgement:
20 1.25 martin * This product includes software developed by the NetBSD
21 1.25 martin * Foundation, Inc. and its contributors.
22 1.25 martin * 4. Neither the name of The NetBSD Foundation nor the names of its
23 1.25 martin * contributors may be used to endorse or promote products derived
24 1.25 martin * from this software without specific prior written permission.
25 1.1 wdk *
26 1.1 wdk * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 1.1 wdk * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 1.1 wdk * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 1.1 wdk * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 1.1 wdk * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 1.1 wdk * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 1.1 wdk * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 1.1 wdk * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 1.1 wdk * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 1.1 wdk * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 1.1 wdk * POSSIBILITY OF SUCH DAMAGE.
37 1.1 wdk */
38 1.11 lukem
39 1.11 lukem #include <sys/cdefs.h>
40 1.26 bjh21 __KERNEL_RCSID(0, "$NetBSD: wdsc.c,v 1.26 2009/01/25 15:23:42 bjh21 Exp $");
41 1.1 wdk
42 1.1 wdk #include <sys/param.h>
43 1.1 wdk #include <sys/systm.h>
44 1.1 wdk #include <sys/kernel.h>
45 1.1 wdk #include <sys/device.h>
46 1.1 wdk #include <sys/buf.h>
47 1.1 wdk
48 1.1 wdk #include <dev/scsipi/scsi_all.h>
49 1.1 wdk #include <dev/scsipi/scsipi_all.h>
50 1.1 wdk #include <dev/scsipi/scsiconf.h>
51 1.1 wdk
52 1.1 wdk #include <machine/cpu.h>
53 1.1 wdk #include <machine/bus.h>
54 1.1 wdk #include <machine/autoconf.h>
55 1.18 rumble #include <machine/machtype.h>
56 1.19 rumble #include <machine/sysconf.h>
57 1.1 wdk
58 1.1 wdk #include <sgimips/hpc/hpcvar.h>
59 1.1 wdk #include <sgimips/hpc/hpcreg.h>
60 1.1 wdk #include <sgimips/hpc/hpcdma.h>
61 1.1 wdk
62 1.16 bjh21 #include <dev/ic/wd33c93reg.h>
63 1.16 bjh21 #include <dev/ic/wd33c93var.h>
64 1.1 wdk
65 1.2 wdk #include <opt_kgdb.h>
66 1.2 wdk #include <sys/kgdb.h>
67 1.2 wdk
68 1.1 wdk struct wdsc_softc {
69 1.6 thorpej struct wd33c93_softc sc_wd33c93; /* Must be first */
70 1.7 simonb struct evcnt sc_intrcnt; /* Interrupt counter */
71 1.2 wdk bus_dma_tag_t sc_dmat;
72 1.2 wdk bus_dmamap_t sc_dmamap;
73 1.2 wdk int sc_flags;
74 1.2 wdk #define WDSC_DMA_ACTIVE 0x1
75 1.7 simonb #define WDSC_DMA_MAPLOADED 0x2
76 1.1 wdk struct hpc_dma_softc sc_hpcdma;
77 1.1 wdk };
78 1.1 wdk
79 1.1 wdk
80 1.14 sekiya void wdsc_attach (struct device *, struct device *, void *);
81 1.14 sekiya int wdsc_match (struct device *, struct cfdata *, void *);
82 1.1 wdk
83 1.26 bjh21 CFATTACH_DECL_NEW(wdsc, sizeof(struct wdsc_softc),
84 1.10 thorpej wdsc_match, wdsc_attach, NULL, NULL);
85 1.1 wdk
86 1.20 christos int wdsc_dmasetup (struct wd33c93_softc *, void **,size_t *,
87 1.14 sekiya int, size_t *);
88 1.14 sekiya int wdsc_dmago (struct wd33c93_softc *);
89 1.14 sekiya void wdsc_dmastop (struct wd33c93_softc *);
90 1.14 sekiya void wdsc_reset (struct wd33c93_softc *);
91 1.14 sekiya int wdsc_dmaintr (void *);
92 1.14 sekiya int wdsc_scsiintr (void *);
93 1.1 wdk
94 1.1 wdk /*
95 1.19 rumble * Match for SCSI devices on the onboard and GIO32 adapter WD33C93 chips
96 1.1 wdk */
97 1.1 wdk int
98 1.14 sekiya wdsc_match(struct device *pdp, struct cfdata *cf, void *auxp)
99 1.1 wdk {
100 1.2 wdk struct hpc_attach_args *haa = auxp;
101 1.1 wdk
102 1.19 rumble if (strcmp(haa->ha_name, cf->cf_name) == 0) {
103 1.19 rumble uint32_t reset, asr, reg;
104 1.19 rumble
105 1.19 rumble reset = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_dmaoff +
106 1.19 rumble haa->hpc_regs->scsi0_ctl);
107 1.19 rumble asr = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_devoff);
108 1.19 rumble
109 1.19 rumble /* XXX: hpc1 offset due to SGIMIPS_BUS_SPACE_HPC brain damage */
110 1.19 rumble asr = (asr + 3) & ~0x3;
111 1.19 rumble
112 1.19 rumble if (platform.badaddr((void *)reset, sizeof(reset)))
113 1.19 rumble return (0);
114 1.19 rumble
115 1.19 rumble *(volatile uint32_t *)reset = haa->hpc_regs->scsi_dmactl_reset;
116 1.19 rumble delay(1000);
117 1.19 rumble *(volatile uint32_t *)reset = 0x0;
118 1.19 rumble
119 1.19 rumble if (platform.badaddr((void *)asr, sizeof(asr)))
120 1.19 rumble return (0);
121 1.19 rumble
122 1.19 rumble reg = *(volatile uint32_t *)asr;
123 1.19 rumble if (haa->hpc_regs->revision == 3) {
124 1.19 rumble if ((reg & 0xff) == SBIC_ASR_INT)
125 1.19 rumble return (1);
126 1.19 rumble } else {
127 1.19 rumble if (((reg >> 8) & 0xff) == SBIC_ASR_INT)
128 1.19 rumble return (1);
129 1.19 rumble }
130 1.19 rumble }
131 1.4 thorpej
132 1.4 thorpej return (0);
133 1.1 wdk }
134 1.1 wdk
135 1.1 wdk /*
136 1.1 wdk * Attach the wdsc driver
137 1.1 wdk */
138 1.1 wdk void
139 1.14 sekiya wdsc_attach(struct device *pdp, struct device *dp, void *auxp)
140 1.1 wdk {
141 1.26 bjh21 struct wdsc_softc *wsc = device_private(dp);
142 1.26 bjh21 struct wd33c93_softc *sc = &wsc->sc_wd33c93;
143 1.2 wdk struct hpc_attach_args *haa = auxp;
144 1.2 wdk int err;
145 1.1 wdk
146 1.26 bjh21 sc->sc_dev = dp;
147 1.4 thorpej sc->sc_regt = haa->ha_st;
148 1.2 wdk wsc->sc_dmat = haa->ha_dmat;
149 1.1 wdk
150 1.12 sekiya wsc->sc_hpcdma.hpc = haa->hpc_regs;
151 1.12 sekiya
152 1.4 thorpej if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
153 1.4 thorpej haa->ha_devoff,
154 1.12 sekiya wsc->sc_hpcdma.hpc->scsi0_devregs_size,
155 1.7 simonb &sc->sc_regh)) != 0) {
156 1.2 wdk printf(": unable to map regs, err=%d\n", err);
157 1.2 wdk return;
158 1.2 wdk }
159 1.1 wdk
160 1.13 sekiya if (bus_dmamap_create(wsc->sc_dmat,
161 1.13 sekiya wsc->sc_hpcdma.hpc->scsi_max_xfer,
162 1.12 sekiya wsc->sc_hpcdma.hpc->scsi_dma_segs,
163 1.12 sekiya wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
164 1.12 sekiya wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
165 1.1 wdk BUS_DMA_WAITOK,
166 1.2 wdk &wsc->sc_dmamap) != 0) {
167 1.1 wdk printf(": failed to create dmamap\n");
168 1.2 wdk return;
169 1.2 wdk }
170 1.1 wdk
171 1.2 wdk sc->sc_dmasetup = wdsc_dmasetup;
172 1.2 wdk sc->sc_dmago = wdsc_dmago;
173 1.2 wdk sc->sc_dmastop = wdsc_dmastop;
174 1.3 thorpej sc->sc_reset = wdsc_reset;
175 1.1 wdk
176 1.6 thorpej sc->sc_adapter.adapt_request = wd33c93_scsi_request;
177 1.2 wdk sc->sc_adapter.adapt_minphys = minphys;
178 1.1 wdk
179 1.12 sekiya sc->sc_id = 0; /* Host ID = 0 */
180 1.21 rumble sc->sc_clkfreq = 200; /* 20MHz */
181 1.22 rumble sc->sc_dmamode = SBIC_CTL_BURST_DMA;
182 1.1 wdk
183 1.2 wdk evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
184 1.26 bjh21 device_xname(sc->sc_dev), "intr");
185 1.1 wdk
186 1.4 thorpej if ((cpu_intr_establish(haa->ha_irq, IPL_BIO,
187 1.4 thorpej wdsc_scsiintr, sc)) == NULL) {
188 1.2 wdk printf(": unable to establish interrupt!\n");
189 1.2 wdk return;
190 1.2 wdk }
191 1.1 wdk
192 1.13 sekiya hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs);
193 1.6 thorpej wd33c93_attach(sc);
194 1.2 wdk return;
195 1.1 wdk }
196 1.1 wdk
197 1.1 wdk /*
198 1.1 wdk * Prime the hardware for a DMA transfer
199 1.2 wdk *
200 1.2 wdk * Requires splbio() interrupts to be disabled by the caller
201 1.1 wdk */
202 1.1 wdk int
203 1.20 christos wdsc_dmasetup(struct wd33c93_softc *dev, void **addr, size_t *len, int datain, size_t *dmasize)
204 1.1 wdk {
205 1.2 wdk struct wdsc_softc *wsc = (void *)dev;
206 1.2 wdk struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
207 1.7 simonb int count, err;
208 1.7 simonb void *vaddr;
209 1.2 wdk
210 1.2 wdk KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
211 1.2 wdk
212 1.2 wdk vaddr = *addr;
213 1.2 wdk count = dsc->sc_dlen = *len;
214 1.2 wdk if (count) {
215 1.2 wdk KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0);
216 1.1 wdk
217 1.2 wdk /* Build list of physical addresses for this transfer */
218 1.2 wdk if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap,
219 1.1 wdk vaddr, count,
220 1.7 simonb NULL /* kernel address */,
221 1.1 wdk BUS_DMA_NOWAIT)) != 0)
222 1.2 wdk panic("%s: bus_dmamap_load err=%d",
223 1.26 bjh21 device_xname(dev->sc_dev), err);
224 1.2 wdk
225 1.2 wdk hpcdma_sglist_create(dsc, wsc->sc_dmamap);
226 1.2 wdk wsc->sc_flags |= WDSC_DMA_MAPLOADED;
227 1.2 wdk
228 1.2 wdk if (datain) {
229 1.18 rumble dsc->sc_dmacmd =
230 1.18 rumble wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd;
231 1.2 wdk dsc->sc_flags |= HPCDMA_READ;
232 1.2 wdk } else {
233 1.18 rumble dsc->sc_dmacmd =
234 1.18 rumble wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd;
235 1.2 wdk dsc->sc_flags &= ~HPCDMA_READ;
236 1.2 wdk }
237 1.2 wdk }
238 1.2 wdk return(count);
239 1.1 wdk }
240 1.1 wdk
241 1.1 wdk /*
242 1.1 wdk * Prime the hardware for the next DMA transfer
243 1.1 wdk */
244 1.1 wdk int
245 1.14 sekiya wdsc_dmago(struct wd33c93_softc *dev)
246 1.1 wdk {
247 1.2 wdk struct wdsc_softc *wsc = (void *)dev;
248 1.2 wdk struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
249 1.1 wdk
250 1.2 wdk if (dsc->sc_dlen == 0)
251 1.2 wdk return(0);
252 1.1 wdk
253 1.2 wdk KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
254 1.2 wdk KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED));
255 1.1 wdk
256 1.2 wdk wsc->sc_flags |= WDSC_DMA_ACTIVE;
257 1.1 wdk
258 1.2 wdk bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
259 1.2 wdk wsc->sc_dmamap->dm_mapsize,
260 1.2 wdk BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
261 1.1 wdk
262 1.2 wdk hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */
263 1.2 wdk
264 1.2 wdk return(wsc->sc_dmamap->dm_mapsize);
265 1.1 wdk }
266 1.1 wdk
267 1.1 wdk /*
268 1.2 wdk * Stop DMA and unload active DMA maps
269 1.1 wdk */
270 1.1 wdk void
271 1.14 sekiya wdsc_dmastop(struct wd33c93_softc *dev)
272 1.1 wdk {
273 1.2 wdk struct wdsc_softc *wsc = (void *)dev;
274 1.2 wdk struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
275 1.1 wdk
276 1.2 wdk if (wsc->sc_flags & WDSC_DMA_ACTIVE) {
277 1.2 wdk if (dsc->sc_flags & HPCDMA_READ)
278 1.2 wdk hpcdma_flush(dsc);
279 1.2 wdk hpcdma_cntl(dsc, 0); /* Stop DMA */
280 1.2 wdk bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
281 1.2 wdk wsc->sc_dmamap->dm_mapsize,
282 1.2 wdk BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
283 1.2 wdk }
284 1.2 wdk if (wsc->sc_flags & WDSC_DMA_MAPLOADED)
285 1.2 wdk bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap);
286 1.2 wdk wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED);
287 1.3 thorpej }
288 1.3 thorpej
289 1.3 thorpej /*
290 1.3 thorpej * Reset the controller.
291 1.3 thorpej */
292 1.3 thorpej void
293 1.14 sekiya wdsc_reset(struct wd33c93_softc *dev)
294 1.3 thorpej {
295 1.3 thorpej struct wdsc_softc *wsc = (void *)dev;
296 1.3 thorpej struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
297 1.3 thorpej
298 1.3 thorpej hpcdma_reset(dsc);
299 1.1 wdk }
300 1.1 wdk
301 1.1 wdk /*
302 1.2 wdk * WD33c93 SCSI controller interrupt
303 1.1 wdk */
304 1.1 wdk int
305 1.14 sekiya wdsc_scsiintr(void *arg)
306 1.1 wdk {
307 1.6 thorpej struct wd33c93_softc *dev = arg;
308 1.2 wdk struct wdsc_softc *wsc = arg;
309 1.2 wdk int found;
310 1.2 wdk
311 1.6 thorpej found = wd33c93_intr(dev);
312 1.2 wdk if (found)
313 1.2 wdk wsc->sc_intrcnt.ev_count++;
314 1.2 wdk return(found);
315 1.1 wdk }
316