Annotation of sys/dev/isa/wdc_isa.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: wdc_isa.c,v 1.12 2006/08/26 14:55:35 jsg Exp $ */
2: /* $NetBSD: wdc_isa.c,v 1.15 1999/05/19 14:41:25 bouyer Exp $ */
3:
4: /*-
5: * Copyright (c) 1998 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Charles M. Hannum and by Onno van der Linden.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the NetBSD
22: * Foundation, Inc. and its contributors.
23: * 4. Neither the name of The NetBSD Foundation nor the names of its
24: * contributors may be used to endorse or promote products derived
25: * from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: #include <sys/types.h>
41: #include <sys/param.h>
42: #include <sys/systm.h>
43: #include <sys/device.h>
44: #include <sys/malloc.h>
45:
46: #include <machine/bus.h>
47: #include <machine/intr.h>
48:
49: #include <dev/isa/isavar.h>
50: #include <dev/isa/isadmavar.h>
51:
52: #include <dev/ata/atavar.h>
53: #include <dev/ic/wdcvar.h>
54:
55: #include "isadma.h"
56:
57: #define WDC_ISA_REG_NPORTS 8
58: #define WDC_ISA_AUXREG_OFFSET 0x206
59: #define WDC_ISA_AUXREG_NPORTS 1 /* XXX "fdc" owns ports 0x3f7/0x377 */
60:
61: /* options passed via the 'flags' config keyword */
62: #define WDC_OPTIONS_32 0x01 /* try to use 32bit data I/O */
63:
64: struct wdc_isa_softc {
65: struct wdc_softc sc_wdcdev;
66: struct channel_softc *wdc_chanptr;
67: struct channel_softc wdc_channel;
68: struct device *sc_isa;
69: isa_chipset_tag_t sc_ic;
70: void *sc_ih;
71: int sc_drq;
72: };
73:
74: int wdc_isa_probe(struct device *, void *, void *);
75: void wdc_isa_attach(struct device *, struct device *, void *);
76:
77: struct cfattach wdc_isa_ca = {
78: sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach
79: };
80:
81: #if NISADMA > 0
82: static void wdc_isa_dma_setup(struct wdc_isa_softc *);
83: static int wdc_isa_dma_init(void *, int, int, void *, size_t, int);
84: static void wdc_isa_dma_start(void *, int, int);
85: static int wdc_isa_dma_finish(void *, int, int, int);
86: #endif /* NISADMA > 0 */
87:
88: int
89: wdc_isa_probe(struct device *parent, void *match, void *aux)
90: {
91: struct channel_softc ch;
92: struct isa_attach_args *ia = aux;
93: struct cfdata *cf = match;
94: int result = 0;
95:
96: bzero(&ch, sizeof ch);
97: ch.cmd_iot = ia->ia_iot;
98: if (bus_space_map(ch.cmd_iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
99: &ch.cmd_ioh))
100: goto out;
101:
102: ch.ctl_iot = ia->ia_iot;
103: if (bus_space_map(ch.ctl_iot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET,
104: WDC_ISA_AUXREG_NPORTS, 0, &ch.ctl_ioh))
105: goto outunmap;
106:
107: if (cf->cf_flags & WDC_OPTION_PROBE_VERBOSE)
108: ch.ch_flags |= WDCF_VERBOSE_PROBE;
109:
110: result = wdcprobe(&ch);
111: if (result) {
112: ia->ia_iosize = WDC_ISA_REG_NPORTS;
113: ia->ia_msize = 0;
114: }
115:
116: bus_space_unmap(ch.ctl_iot, ch.ctl_ioh, WDC_ISA_AUXREG_NPORTS);
117: outunmap:
118: bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, WDC_ISA_REG_NPORTS);
119: out:
120: return (result);
121: }
122:
123: void
124: wdc_isa_attach(struct device *parent, struct device *self, void *aux)
125: {
126: struct wdc_isa_softc *sc = (void *)self;
127: struct isa_attach_args *ia = aux;
128:
129: printf("\n");
130:
131: sc->wdc_channel.cmd_iot = ia->ia_iot;
132: sc->wdc_channel.ctl_iot = ia->ia_iot;
133: sc->sc_ic = ia->ia_ic;
134: sc->sc_isa = parent;
135:
136: if (bus_space_map(sc->wdc_channel.cmd_iot, ia->ia_iobase,
137: WDC_ISA_REG_NPORTS, 0, &sc->wdc_channel.cmd_ioh) ||
138: bus_space_map(sc->wdc_channel.ctl_iot,
139: ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS,
140: 0, &sc->wdc_channel.ctl_ioh)) {
141: printf("%s: couldn't map registers\n",
142: sc->sc_wdcdev.sc_dev.dv_xname);
143: }
144: sc->wdc_channel.data32iot = sc->wdc_channel.cmd_iot;
145: sc->wdc_channel.data32ioh = sc->wdc_channel.cmd_ioh;
146:
147: sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
148: IPL_BIO, wdcintr, &sc->wdc_channel, sc->sc_wdcdev.sc_dev.dv_xname);
149:
150: if (ia->ia_drq != DRQUNK) {
151: #if NISADMA > 0
152: sc->sc_drq = ia->ia_drq;
153:
154: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA;
155: sc->sc_wdcdev.dma_arg = sc;
156: sc->sc_wdcdev.dma_init = wdc_isa_dma_init;
157: sc->sc_wdcdev.dma_start = wdc_isa_dma_start;
158: sc->sc_wdcdev.dma_finish = wdc_isa_dma_finish;
159: wdc_isa_dma_setup(sc);
160: #else /* NISADMA > 0 */
161: printf("%s: ignoring drq, isa dma not supported",
162: sc->sc_wdcdev.sc_dev.dv_xname);
163: #endif /* NISADMA > 0 */
164: }
165: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_PREATA;
166: if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_32)
167: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA32;
168: sc->sc_wdcdev.PIO_cap = 0;
169: sc->wdc_chanptr = &sc->wdc_channel;
170: sc->sc_wdcdev.channels = &sc->wdc_chanptr;
171: sc->sc_wdcdev.nchannels = 1;
172: sc->wdc_channel.channel = 0;
173: sc->wdc_channel.wdc = &sc->sc_wdcdev;
174: sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue),
175: M_DEVBUF, M_NOWAIT);
176: if (sc->wdc_channel.ch_queue == NULL) {
177: printf("%s: can't allocate memory for command queue",
178: sc->sc_wdcdev.sc_dev.dv_xname);
179: return;
180: }
181: wdcattach(&sc->wdc_channel);
182: wdc_print_current_modes(&sc->wdc_channel);
183: }
184:
185: #if NISADMA > 0
186: static void
187: wdc_isa_dma_setup(struct wdc_isa_softc *sc)
188: {
189: if (isa_dmamap_create(sc->sc_isa, sc->sc_drq,
190: MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
191: printf("%s: can't create map for drq %d\n",
192: sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq);
193: sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA;
194: }
195: }
196:
197: static int
198: wdc_isa_dma_init(void *v, int channel, int drive, void *databuf, size_t datalen,
199: int read)
200: {
201: struct wdc_isa_softc *sc = v;
202:
203: isa_dmastart(sc->sc_isa, sc->sc_drq, databuf, datalen, NULL,
204: (read ? DMAMODE_READ : DMAMODE_WRITE),
205: BUS_DMA_NOWAIT);
206:
207: return 0;
208: }
209:
210: static void
211: wdc_isa_dma_start(void *v, int channel, int drive)
212: {
213: /* nothing to do */
214: }
215:
216: static int
217: wdc_isa_dma_finish(void *v, int channel, int drive, int force)
218: {
219: struct wdc_isa_softc *sc = v;
220:
221: isa_dmadone(sc->sc_isa, sc->sc_drq);
222:
223: return 0;
224: }
225: #endif /* NISADMA > 0 */
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