1/*	$NetBSD: eisa.c,v 1.50 2024/05/13 00:01:53 msaitoh Exp $	*/
2
3/*
4 * Copyright (c) 1995, 1996 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou
18 *      for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * EISA Bus device
36 *
37 * Makes sure an EISA bus is present, and finds and attaches devices
38 * living on it.
39 */
40
41#include <sys/cdefs.h>
42__KERNEL_RCSID(0, "$NetBSD: eisa.c,v 1.50 2024/05/13 00:01:53 msaitoh Exp $");
43
44#include "opt_eisaverbose.h"
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/device.h>
49
50#include <sys/bus.h>
51
52#include <dev/eisa/eisareg.h>
53#include <dev/eisa/eisavar.h>
54#include <dev/eisa/eisadevs.h>
55
56#include "locators.h"
57
58static int	eisamatch(device_t, cfdata_t, void *);
59static void	eisaattach(device_t, device_t, void *);
60
61CFATTACH_DECL_NEW(eisa, 0,
62    eisamatch, eisaattach, NULL, NULL);
63
64static int	eisaprint(void *, const char *);
65static void	eisa_devinfo(const char *, char *, size_t);
66
67static int
68eisamatch(device_t parent, cfdata_t cf,
69    void *aux)
70{
71	/* XXX check other indicators */
72
73	return (1);
74}
75
76static int
77eisaprint(void *aux, const char *pnp)
78{
79	struct eisa_attach_args *ea = aux;
80	char devinfo[256];
81
82	if (pnp) {
83		eisa_devinfo(ea->ea_idstring, devinfo, sizeof(devinfo));
84		aprint_normal("%s at %s", devinfo, pnp);
85	}
86	aprint_normal(" slot %d", ea->ea_slot);
87	return (UNCONF);
88}
89
90static void
91eisaattach(device_t parent, device_t self, void *aux)
92{
93	struct eisabus_attach_args *eba = aux;
94	bus_space_tag_t iot, memt;
95	bus_dma_tag_t dmat;
96	eisa_chipset_tag_t ec;
97	int slot, maxnslots;
98
99	eisa_attach_hook(parent, self, eba);
100	printf("\n");
101
102	iot = eba->eba_iot;
103	memt = eba->eba_memt;
104	ec = eba->eba_ec;
105	dmat = eba->eba_dmat;
106
107	/*
108	 * Search for and attach subdevices.
109	 *
110	 * Slot 0 is the "motherboard" slot, and the code attaching
111	 * the EISA bus should have already attached an ISA bus there.
112	 */
113	maxnslots = eisa_maxslots(ec);
114	for (slot = 1; slot < maxnslots; slot++) {
115		struct eisa_attach_args ea;
116		u_int slotaddr;
117		bus_space_handle_t slotioh;
118		int i;
119		int locs[EISACF_NLOCS];
120
121		ea.ea_iot = iot;
122		ea.ea_memt = memt;
123		ea.ea_ec = ec;
124		ea.ea_dmat = dmat;
125		ea.ea_slot = slot;
126		slotaddr = EISA_SLOT_ADDR(slot);
127
128		/*
129		 * Get a mapping for the whole slot-specific address
130		 * space.  If we can't, assume nothing's there but warn
131		 * about it.
132		 */
133		if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
134			aprint_error_dev(self,
135			    "can't map I/O space for slot %d\n", slot);
136			continue;
137		}
138
139		/* Get the vendor ID bytes */
140		for (i = 0; i < EISA_NVIDREGS; i++)
141			ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
142			    EISA_SLOTOFF_VID + i);
143
144		/* Check for device existence */
145		if (EISA_VENDID_NODEV(ea.ea_vid)) {
146#if 0
147			printf("no device at %s slot %d\n", device_xname(self),
148			    slot);
149			printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0], ea.ea_vid[1]);
150#endif
151			bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
152			continue;
153		}
154
155		/* And check that the firmware didn't biff something badly */
156		if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
157			printf("%s slot %d not configured by BIOS?\n",
158			    device_xname(self), slot);
159			bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
160			continue;
161		}
162
163		/* Get the product ID bytes */
164		for (i = 0; i < EISA_NPIDREGS; i++)
165			ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
166			    EISA_SLOTOFF_PID + i);
167
168		/* Create the ID string from the vendor and product IDs */
169		ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
170		ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
171		ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
172		ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
173		ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
174		ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
175		ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
176		ea.ea_idstring[7] = '\0';		/* sanity */
177
178		/* We no longer need the I/O handle; free it. */
179		bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
180
181		locs[EISACF_SLOT] = slot;
182
183		/* Attach matching device. */
184		config_found(self, &ea, eisaprint,
185		    CFARGS(.submatch = config_stdsubmatch,
186			   .locators = locs));
187	}
188}
189
190int
191eisa_compatible_match(const struct eisa_attach_args * const ea,
192    const struct device_compatible_entry *dce)
193{
194	const char *idstring = ea->ea_idstring;
195
196	return device_compatible_pmatch(&idstring, 1, dce);
197}
198
199const struct device_compatible_entry *
200eisa_compatible_lookup(const struct eisa_attach_args * const ea,
201    const struct device_compatible_entry *dce)
202{
203	const char *idstring = ea->ea_idstring;
204
205	return device_compatible_plookup(&idstring, 1, dce);
206}
207
208#ifdef EISAVERBOSE
209/*
210 * Descriptions of known vendors and devices ("products").
211 */
212struct eisa_knowndev {
213	int	flags;
214	const char *id, *name;
215};
216#define EISA_KNOWNDEV_NOPROD	0x01		/* match on vendor only */
217
218#include <dev/eisa/eisadevs_data.h>
219#endif	/* EISAVEBSOSE */
220
221void
222eisa_devinfo(const char *id, char *cp, size_t l)
223{
224#ifdef EISAVERBOSE
225	const char *name;
226	const struct eisa_knowndev *edp;
227	int match, onlyvendor;
228
229	onlyvendor = 0;
230	name = NULL;
231
232	/* find the device in the table, if possible. */
233	for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
234		if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
235			match = (strncmp(edp->id, id, 3) == 0);
236		else
237			match = (strcmp(edp->id, id) == 0);
238		if (match) {
239			name = edp->name;
240			onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
241			break;
242		}
243	}
244
245	if (name == NULL)
246		snprintf(cp, l, "unknown device %s", id);
247	else if (onlyvendor)
248		snprintf(cp, l, "unknown %s device %s", name, id);
249	else
250		snprintf(cp, l, "%s", name);
251#else	/* EISAVERBOSE */
252
253	snprintf(cp, l, "device %s", id);
254#endif	/* EISAVERBOSE */
255}
256