isa_machdep.c revision 1.41 
1/*	$NetBSD: isa_machdep.c,v 1.41 2021/08/07 16:18:54 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.41 2021/08/07 16:18:54 thorpej Exp $");
34
35#include "opt_vr41xx.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/reboot.h>
40#include <sys/device.h>
41
42#include <dev/isa/isavar.h>
43#include <dev/isa/isareg.h>
44
45#include <machine/platid.h>
46#include <machine/platid_mask.h>
47#include <machine/bus.h>
48#include <machine/bus_space_hpcmips.h>
49#include <machine/debug.h>
50
51#include <dev/hpc/hpciovar.h>
52
53#include <hpcmips/vr/vripif.h>
54
55#include "locators.h"
56
57#define VRISADEBUG
58
59#ifdef VRISADEBUG
60#ifndef VRISADEBUG_CONF
61#define VRISADEBUG_CONF 0
62#endif /* VRISADEBUG_CONF */
63int vrisa_debug = VRISADEBUG_CONF;
64#define DPRINTF(arg) if (vrisa_debug) printf arg;
65#define DBITDISP(mask) if (vrisa_debug) dbg_bit_print(mask);
66#define VPRINTF(arg) if (bootverbose || vrisa_debug) printf arg;
67#else /* VRISADEBUG */
68#define DPRINTF(arg)
69#define DBITDISP(mask)
70#define VPRINTF(arg) if (bootverbose) printf arg;
71#endif /* VRISADEBUG */
72
73/*
74 * intrrupt no. encoding:
75 *
76 * 0x0000000f ISA IRQ#
77 * 0x00ff0000 GPIO port#
78 * 0x01000000 interrupt signal hold/through	(1:hold/0:though)
79 * 0x02000000 interrupt detection level		(1:low /0:high	)
80 * 0x04000000 interrupt detection trigger	(1:edge/0:level	)
81 */
82#define INTR_IRQ(i)	(((i)>> 0) & 0x0f)
83#define INTR_PORT(i)	(((i)>>16) & 0xff)
84#define INTR_MODE(i)	(((i)>>24) & 0x07)
85#define INTR_NIRQS	16
86
87int	vrisabprint(void *, const char *);
88int	vrisabmatch(device_t, cfdata_t, void *);
89void	vrisabattach(device_t, device_t, void *);
90
91struct vrisab_softc {
92	hpcio_chip_t sc_hc;
93	int sc_intr_map[INTR_NIRQS]; /* ISA <-> GIU inerrupt line mapping */
94	struct hpcmips_isa_chipset sc_isa_ic;
95};
96
97CFATTACH_DECL_NEW(vrisab, sizeof(struct vrisab_softc),
98    vrisabmatch, vrisabattach, NULL, NULL);
99
100#ifdef DEBUG_FIND_PCIC
101#include <mips/cpuregs.h>
102#warning DEBUG_FIND_PCIC
103static void __find_pcic(void);
104#endif
105
106#ifdef DEBUG_FIND_COMPORT
107#include <mips/cpuregs.h>
108#include <dev/ic/ns16550reg.h>
109#include <dev/ic/comreg.h>
110#warning DEBUG_FIND_COMPORT
111static void __find_comport(void);
112#endif
113
114int
115vrisabmatch(device_t parent, cfdata_t match, void *aux)
116{
117	struct hpcio_attach_args *haa = aux;
118	platid_mask_t mask;
119	int n;
120
121	if (strcmp(haa->haa_busname, match->cf_name))
122		return (0);
123
124	if (match->cf_loc[HPCIOIFCF_PLATFORM] == HPCIOIFCF_PLATFORM_DEFAULT)
125		return (1);
126
127	mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
128	if ((n = platid_match(&platid, &mask)) != 0)
129		return (n + 2);
130
131	return (0);
132}
133
134void
135vrisabattach(device_t parent, device_t self, void *aux)
136{
137	struct hpcio_attach_args *haa = aux;
138	struct vrisab_softc *sc = device_private(self);
139	struct isabus_attach_args iba;
140	struct bus_space_tag_hpcmips *iot, *memt;
141	bus_addr_t offset;
142	int i;
143
144	sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, VRIP_IOCHIP_VRGIU);
145	sc->sc_isa_ic.ic_sc = sc;
146
147	iba.iba_ic	= &sc->sc_isa_ic;
148	iba.iba_dmat    = 0; /* XXX not yet */
149
150	/* Allocate ISA memory space */
151	memt = hpcmips_alloc_bus_space_tag();
152	offset = device_cfdata(self)->cf_loc[VRISABIFCF_ISAMEMOFFSET];
153	hpcmips_init_bus_space(memt,
154	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA mem",
155	    VR_ISA_MEM_BASE + offset, VR_ISA_MEM_SIZE - offset);
156	iba.iba_memt = &memt->bst;
157
158	/* Allocate ISA port space */
159	iot = hpcmips_alloc_bus_space_tag();
160	offset = device_cfdata(self)->cf_loc[VRISABIFCF_ISAPORTOFFSET];
161	hpcmips_init_bus_space(iot,
162	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA port",
163	    VR_ISA_PORT_BASE + offset, VR_ISA_PORT_SIZE - offset);
164	iba.iba_iot = &iot->bst;
165
166#ifdef DEBUG_FIND_PCIC
167#warning DEBUG_FIND_PCIC
168	__find_pcic();
169#else
170	/* Initialize ISA IRQ <-> GPIO mapping */
171	for (i = 0; i < INTR_NIRQS; i++)
172		sc->sc_intr_map[i] = -1;
173	printf(": ISA port %#x-%#x mem %#x-%#x\n",
174	    iot->base, iot->base + iot->size,
175	    memt->base, memt->base + memt->size);
176	config_found(self, &iba, vrisabprint, CFARGS_NONE);
177#endif
178
179#ifdef DEBUG_FIND_COMPORT
180#warning DEBUG_FIND_COMPORT
181	__find_comport();
182#endif
183}
184
185int
186vrisabprint(void *aux, const char *pnp)
187{
188	if (pnp)
189		return (QUIET);
190
191	return (UNCONF);
192}
193
194void
195isa_attach_hook(device_t parent, device_t self,
196    struct isabus_attach_args *iba)
197{
198
199}
200
201void
202isa_detach_hook(isa_chipset_tag_t ic, device_t self)
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 const 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(isa_chipset_tag_t ic, void *arg)
267{
268	struct vrisab_softc *sc = ic->ic_sc;
269	/* Call Vr routine */
270	hpcio_intr_disestablish(sc->sc_hc, arg);
271}
272
273int
274isa_intr_alloc(isa_chipset_tag_t ic, int mask, int type, int *irq)
275{
276	/* XXX not coded yet. this is temporary XXX */
277	DPRINTF(("isa_intr_alloc:"));
278	DBITDISP(mask);
279	*irq = (ffs(mask) -1); /* XXX */
280
281	return (0);
282}
283
284#ifdef DEBUG_FIND_PCIC
285#warning DEBUG_FIND_PCIC
286static void
287__find_pcic(void)
288{
289	int i, j, step, found;
290	u_int32_t addr;
291	u_int8_t reg;
292	int __read_revid (u_int32_t port)
293	    {
294		    addr = MIPS_PHYS_TO_KSEG1(i + port);
295		    printf("%#x\r", i);
296		    for (found = 0, j = 0; j < 0x100; j += 0x40) {
297			    *((volatile u_int8_t *)addr) = j;
298			    reg = *((volatile u_int8_t *)(addr + 1));
299#ifdef DEBUG_FIND_PCIC_I82365SL_ONLY
300			    if (reg == 0x82 || reg == 0x83) {
301#else
302			    if ((reg & 0xc0) == 0x80) {
303#endif
304					    found++;
305			    }
306			    if (found)
307				    printf("\nfound %d socket at %#x"
308					"(base from %#x)\n", found, addr,
309					i + port - VR_ISA_PORT_BASE);
310		    }
311	    }
312	step = 0x1000000;
313	printf("\nFinding PCIC. Trying ISA port %#x-%#x step %#x\n",
314	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE, step);
315	for (i = VR_ISA_PORT_BASE; i < VR_ISA_PORT_BASE+VR_ISA_PORT_SIZE;
316	    i+= step) {
317		__read_revid (0x3e0);
318		__read_revid (0x3e2);
319	}
320}
321#endif /* DEBUG_FIND_PCIC */
322
323
324#ifdef DEBUG_FIND_COMPORT
325#warning DEBUG_FIND_COMPORT
326
327static int probe_com(u_int32_t);
328
329static int
330probe_com(u_int32_t port_addr)
331{
332	u_int32_t addr;
333	u_int8_t ubtmp1, ubtmp2;
334
335	addr = MIPS_PHYS_TO_KSEG1(port_addr);
336
337	*((volatile u_int8_t *)(addr + com_cfcr)) = LCR_8BITS;
338	*((volatile u_int8_t *)(addr + com_iir)) = 0;
339
340	ubtmp1 = *((volatile u_int8_t *)(addr + com_cfcr));
341	ubtmp2 = *((volatile u_int8_t *)(addr + com_iir));
342
343	if ((ubtmp1 != LCR_8BITS) || ((ubtmp2 & 0x38) != 0)) {
344		return (0);
345	}
346
347	return (1);
348}
349
350static void
351__find_comport(void)
352{
353	int found;
354	u_int32_t port, step;
355
356	found = 0;
357	step = 0x08;
358
359	printf("Searching COM port. Trying ISA port %#x-%#x step %#x\n",
360	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE - 1, step );
361
362	for (port = VR_ISA_PORT_BASE;
363	    port < (VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE); port += step){
364		if (probe_com(port)) {
365			found++;
366			printf("found %d at %#x\n", found, port);
367		}
368	}
369}
370#endif /* DEBUG_FIND_COMPORT */
371