isa_machdep.c revision 1.27 
1/*	$NetBSD: isa_machdep.c,v 1.27 2002/10/02 05:26:49 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include "opt_vr41xx.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/reboot.h>
44
45#include <dev/isa/isavar.h>
46#include <dev/isa/isareg.h>
47
48#include <machine/platid.h>
49#include <machine/platid_mask.h>
50#include <machine/bus.h>
51#include <machine/bus_space_hpcmips.h>
52#include <machine/debug.h>
53
54#include <dev/hpc/hpciovar.h>
55
56#include <hpcmips/vr/vripif.h>
57
58#include "locators.h"
59
60#define VRISADEBUG
61
62#ifdef VRISADEBUG
63#ifndef VRISADEBUG_CONF
64#define VRISADEBUG_CONF 0
65#endif /* VRISADEBUG_CONF */
66int vrisa_debug = VRISADEBUG_CONF;
67#define DPRINTF(arg) if (vrisa_debug) printf arg;
68#define DBITDISP(mask) if (vrisa_debug) dbg_bit_print(mask);
69#define VPRINTF(arg) if (bootverbose || vrisa_debug) printf arg;
70#else /* VRISADEBUG */
71#define DPRINTF(arg)
72#define DBITDISP(mask)
73#define VPRINTF(arg) if (bootverbose) printf arg;
74#endif /* VRISADEBUG */
75
76/*
77 * intrrupt no. encoding:
78 *
79 * 0x0000000f ISA IRQ#
80 * 0x00ff0000 GPIO port#
81 * 0x01000000 interrupt signal hold/through	(1:hold/0:though)
82 * 0x02000000 interrupt detection level		(1:low /0:high	)
83 * 0x04000000 interrupt detection trigger	(1:edge/0:level	)
84 */
85#define INTR_IRQ(i)	(((i)>> 0) & 0x0f)
86#define INTR_PORT(i)	(((i)>>16) & 0xff)
87#define INTR_MODE(i)	(((i)>>24) & 0x07)
88#define INTR_NIRQS	16
89
90int	vrisabprint(void *, const char *);
91int	vrisabmatch(struct device *, struct cfdata *, void *);
92void	vrisabattach(struct device *, struct device *, void *);
93
94struct vrisab_softc {
95	struct device sc_dev;
96	hpcio_chip_t sc_hc;
97	int sc_intr_map[INTR_NIRQS]; /* ISA <-> GIU inerrupt line mapping */
98	struct hpcmips_isa_chipset sc_isa_ic;
99};
100
101CFATTACH_DECL(vrisab, sizeof(struct vrisab_softc),
102    vrisabmatch, vrisabattach, NULL, NULL);
103
104#ifdef DEBUG_FIND_PCIC
105#include <mips/cpuregs.h>
106#warning DEBUG_FIND_PCIC
107static void __find_pcic(void);
108#endif
109
110#ifdef DEBUG_FIND_COMPORT
111#include <mips/cpuregs.h>
112#include <dev/ic/ns16550reg.h>
113#include <dev/ic/comreg.h>
114#warning DEBUG_FIND_COMPORT
115static void __find_comport(void);
116#endif
117
118int
119vrisabmatch(struct device *parent, struct cfdata *match, void *aux)
120{
121	struct hpcio_attach_args *haa = aux;
122	platid_mask_t mask;
123	int n;
124
125	if (strcmp(haa->haa_busname, match->cf_name))
126		return (0);
127
128	if (match->cf_loc[HPCIOIFCF_PLATFORM] == HPCIOIFCF_PLATFORM_DEFAULT)
129		return (1);
130
131	mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
132	if ((n = platid_match(&platid, &mask)) != 0)
133		return (n + 2);
134
135	return (0);
136}
137
138void
139vrisabattach(struct device *parent, struct device *self, void *aux)
140{
141	struct hpcio_attach_args *haa = aux;
142	struct vrisab_softc *sc = (void*)self;
143	struct isabus_attach_args iba;
144	struct bus_space_tag_hpcmips *iot, *memt;
145	bus_addr_t offset;
146	int i;
147
148	sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, VRIP_IOCHIP_VRGIU);
149	sc->sc_isa_ic.ic_sc = sc;
150
151	iba.iba_busname = "isa";
152	iba.iba_ic	= &sc->sc_isa_ic;
153	iba.iba_dmat    = 0; /* XXX not yet */
154
155	/* Allocate ISA memory space */
156	memt = hpcmips_alloc_bus_space_tag();
157	offset = sc->sc_dev.dv_cfdata->cf_loc[VRISABIFCF_ISAMEMOFFSET];
158	hpcmips_init_bus_space(memt,
159	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA mem",
160	    VR_ISA_MEM_BASE + offset, VR_ISA_MEM_SIZE - offset);
161	iba.iba_memt = &memt->bst;
162
163	/* Allocate ISA port space */
164	iot = hpcmips_alloc_bus_space_tag();
165	offset = sc->sc_dev.dv_cfdata->cf_loc[VRISABIFCF_ISAPORTOFFSET];
166	hpcmips_init_bus_space(iot,
167	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA port",
168	    VR_ISA_PORT_BASE + offset, VR_ISA_PORT_SIZE - offset);
169	iba.iba_iot = &iot->bst;
170
171#ifdef DEBUG_FIND_PCIC
172#warning DEBUG_FIND_PCIC
173	__find_pcic();
174#else
175	/* Initialize ISA IRQ <-> GPIO mapping */
176	for (i = 0; i < INTR_NIRQS; i++)
177		sc->sc_intr_map[i] = -1;
178	printf(": ISA port %#x-%#x mem %#x-%#x\n",
179	    iot->base, iot->base + iot->size,
180	    memt->base, memt->base + memt->size);
181	config_found(self, &iba, vrisabprint);
182#endif
183
184#ifdef DEBUG_FIND_COMPORT
185#warning DEBUG_FIND_COMPORT
186	__find_comport();
187#endif
188}
189
190int
191vrisabprint(void *aux, const char *pnp)
192{
193	if (pnp)
194		return (QUIET);
195
196	return (UNCONF);
197}
198
199void
200isa_attach_hook(struct device *parent, struct device *self,
201    struct isabus_attach_args *iba)
202{
203
204}
205
206const struct evcnt *
207isa_intr_evcnt(isa_chipset_tag_t ic, int irq)
208{
209
210	/* XXX for now, no evcnt parent reported */
211	return (NULL);
212}
213
214void *
215isa_intr_establish(isa_chipset_tag_t ic, int intr, int type, int level,
216    int (*ih_fun)(void*), void *ih_arg)
217{
218	struct vrisab_softc *sc = ic->ic_sc;
219	int port, irq, mode;
220
221	static int intr_modes[8] = {
222		HPCIO_INTR_LEVEL_HIGH_THROUGH,
223		HPCIO_INTR_LEVEL_HIGH_HOLD,
224		HPCIO_INTR_LEVEL_LOW_THROUGH,
225		HPCIO_INTR_LEVEL_LOW_HOLD,
226		HPCIO_INTR_EDGE_THROUGH,
227		HPCIO_INTR_EDGE_HOLD,
228		HPCIO_INTR_EDGE_THROUGH,
229		HPCIO_INTR_EDGE_HOLD,
230	};
231#ifdef VRISADEBUG
232	static char* intr_mode_names[8] = {
233		"level high through",
234		"level high hold",
235		"level low through",
236		"level low hold",
237		"edge through",
238		"edge hold",
239		"edge through",
240		"edge hold",
241	};
242#endif /* VRISADEBUG */
243	/*
244	 * ISA IRQ <-> GPIO port mapping
245	 */
246	irq = INTR_IRQ(intr);
247	if (sc->sc_intr_map[irq] != -1) {
248		/* already mapped */
249		intr = sc->sc_intr_map[irq];
250	} else {
251		/* not mapped yet */
252		sc->sc_intr_map[irq] = intr; /* Register it */
253	}
254	mode = INTR_MODE(intr);
255	port = INTR_PORT(intr);
256
257	VPRINTF(("ISA IRQ %d -> %s port %d, %s\n",
258	    irq, sc->sc_hc->hc_name, port, intr_mode_names[mode]));
259
260	/* Call Vr routine */
261	return (hpcio_intr_establish(sc->sc_hc, port, intr_modes[mode],
262	    ih_fun, ih_arg));
263}
264
265void
266isa_intr_disestablish(ic, arg)
267	isa_chipset_tag_t ic;
268	void *arg;
269{
270	struct vrisab_softc *sc = ic->ic_sc;
271	/* Call Vr routine */
272	hpcio_intr_disestablish(sc->sc_hc, arg);
273}
274
275int
276isa_intr_alloc(isa_chipset_tag_t ic, int mask, int type, int *irq)
277{
278	/* XXX not coded yet. this is temporary XXX */
279	DPRINTF(("isa_intr_alloc:"));
280	DBITDISP(mask);
281	*irq = (ffs(mask) -1); /* XXX */
282
283	return (0);
284}
285
286#ifdef DEBUG_FIND_PCIC
287#warning DEBUG_FIND_PCIC
288static void
289__find_pcic(void)
290{
291	int i, j, step, found;
292	u_int32_t addr;
293	u_int8_t reg;
294	int __read_revid (u_int32_t port)
295	    {
296		    addr = MIPS_PHYS_TO_KSEG1(i + port);
297		    printf("%#x\r", i);
298		    for (found = 0, j = 0; j < 0x100; j += 0x40) {
299			    *((volatile u_int8_t *)addr) = j;
300			    reg = *((volatile u_int8_t *)(addr + 1));
301#ifdef DEBUG_FIND_PCIC_I82365SL_ONLY
302			    if (reg == 0x82 || reg == 0x83) {
303#else
304			    if ((reg & 0xc0) == 0x80) {
305#endif
306					    found++;
307			    }
308			    if (found)
309				    printf("\nfound %d socket at %#x"
310					"(base from %#x)\n", found, addr,
311					i + port - VR_ISA_PORT_BASE);
312		    }
313	    }
314	step = 0x1000000;
315	printf("\nFinding PCIC. Trying ISA port %#x-%#x step %#x\n",
316	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE, step);
317	for (i = VR_ISA_PORT_BASE; i < VR_ISA_PORT_BASE+VR_ISA_PORT_SIZE;
318	    i+= step) {
319		__read_revid (0x3e0);
320		__read_revid (0x3e2);
321	}
322}
323#endif /* DEBUG_FIND_PCIC */
324
325
326#ifdef DEBUG_FIND_COMPORT
327#warning DEBUG_FIND_COMPORT
328
329static int probe_com(u_int32_t);
330
331static int
332probe_com(u_int32_t port_addr)
333{
334	u_int32_t addr;
335	u_int8_t ubtmp1, ubtmp2;
336
337	addr = MIPS_PHYS_TO_KSEG1(port_addr);
338
339	*((volatile u_int8_t *)(addr + com_cfcr)) = LCR_8BITS;
340	*((volatile u_int8_t *)(addr + com_iir)) = 0;
341
342	ubtmp1 = *((volatile u_int8_t *)(addr + com_cfcr));
343	ubtmp2 = *((volatile u_int8_t *)(addr + com_iir));
344
345	if ((ubtmp1 != LCR_8BITS) || ((ubtmp2 & 0x38) != 0)) {
346		return (0);
347	}
348
349	return (1);
350}
351
352static void
353__find_comport()
354{
355	int found;
356	u_int32_t port, step;
357
358	found = 0;
359	step = 0x08;
360
361	printf("Searching COM port. Trying ISA port %#x-%#x step %#x\n",
362	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE - 1, step );
363
364	for (port = VR_ISA_PORT_BASE;
365	    port < (VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE); port += step){
366		if (probe_com(port)) {
367			found++;
368			printf("found %d at %#x\n", found, port);
369		}
370	}
371}
372#endif /* DEBUG_FIND_COMPORT */
373