isa_machdep.c revision 1.33 
1/*	$NetBSD: isa_machdep.c,v 1.33 2008/01/04 22:13:56 ad 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 <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.33 2008/01/04 22:13:56 ad Exp $");
41
42#include "opt_vr41xx.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/reboot.h>
47#include <sys/device.h>
48
49#include <dev/isa/isavar.h>
50#include <dev/isa/isareg.h>
51
52#include <machine/platid.h>
53#include <machine/platid_mask.h>
54#include <machine/bus.h>
55#include <machine/bus_space_hpcmips.h>
56#include <machine/debug.h>
57
58#include <dev/hpc/hpciovar.h>
59
60#include <hpcmips/vr/vripif.h>
61
62#include "locators.h"
63
64#define VRISADEBUG
65
66#ifdef VRISADEBUG
67#ifndef VRISADEBUG_CONF
68#define VRISADEBUG_CONF 0
69#endif /* VRISADEBUG_CONF */
70int vrisa_debug = VRISADEBUG_CONF;
71#define DPRINTF(arg) if (vrisa_debug) printf arg;
72#define DBITDISP(mask) if (vrisa_debug) dbg_bit_print(mask);
73#define VPRINTF(arg) if (bootverbose || vrisa_debug) printf arg;
74#else /* VRISADEBUG */
75#define DPRINTF(arg)
76#define DBITDISP(mask)
77#define VPRINTF(arg) if (bootverbose) printf arg;
78#endif /* VRISADEBUG */
79
80/*
81 * intrrupt no. encoding:
82 *
83 * 0x0000000f ISA IRQ#
84 * 0x00ff0000 GPIO port#
85 * 0x01000000 interrupt signal hold/through	(1:hold/0:though)
86 * 0x02000000 interrupt detection level		(1:low /0:high	)
87 * 0x04000000 interrupt detection trigger	(1:edge/0:level	)
88 */
89#define INTR_IRQ(i)	(((i)>> 0) & 0x0f)
90#define INTR_PORT(i)	(((i)>>16) & 0xff)
91#define INTR_MODE(i)	(((i)>>24) & 0x07)
92#define INTR_NIRQS	16
93
94int	vrisabprint(void *, const char *);
95int	vrisabmatch(struct device *, struct cfdata *, void *);
96void	vrisabattach(struct device *, struct device *, void *);
97
98struct vrisab_softc {
99	struct device sc_dev;
100	hpcio_chip_t sc_hc;
101	int sc_intr_map[INTR_NIRQS]; /* ISA <-> GIU inerrupt line mapping */
102	struct hpcmips_isa_chipset sc_isa_ic;
103};
104
105CFATTACH_DECL(vrisab, sizeof(struct vrisab_softc),
106    vrisabmatch, vrisabattach, NULL, NULL);
107
108#ifdef DEBUG_FIND_PCIC
109#include <mips/cpuregs.h>
110#warning DEBUG_FIND_PCIC
111static void __find_pcic(void);
112#endif
113
114#ifdef DEBUG_FIND_COMPORT
115#include <mips/cpuregs.h>
116#include <dev/ic/ns16550reg.h>
117#include <dev/ic/comreg.h>
118#warning DEBUG_FIND_COMPORT
119static void __find_comport(void);
120#endif
121
122int
123vrisabmatch(struct device *parent, struct cfdata *match, void *aux)
124{
125	struct hpcio_attach_args *haa = aux;
126	platid_mask_t mask;
127	int n;
128
129	if (strcmp(haa->haa_busname, match->cf_name))
130		return (0);
131
132	if (match->cf_loc[HPCIOIFCF_PLATFORM] == HPCIOIFCF_PLATFORM_DEFAULT)
133		return (1);
134
135	mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
136	if ((n = platid_match(&platid, &mask)) != 0)
137		return (n + 2);
138
139	return (0);
140}
141
142void
143vrisabattach(struct device *parent, struct device *self, void *aux)
144{
145	struct hpcio_attach_args *haa = aux;
146	struct vrisab_softc *sc = (void*)self;
147	struct isabus_attach_args iba;
148	struct bus_space_tag_hpcmips *iot, *memt;
149	bus_addr_t offset;
150	int i;
151
152	sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, VRIP_IOCHIP_VRGIU);
153	sc->sc_isa_ic.ic_sc = sc;
154
155	iba.iba_ic	= &sc->sc_isa_ic;
156	iba.iba_dmat    = 0; /* XXX not yet */
157
158	/* Allocate ISA memory space */
159	memt = hpcmips_alloc_bus_space_tag();
160	offset = device_cfdata(&sc->sc_dev)->cf_loc[VRISABIFCF_ISAMEMOFFSET];
161	hpcmips_init_bus_space(memt,
162	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA mem",
163	    VR_ISA_MEM_BASE + offset, VR_ISA_MEM_SIZE - offset);
164	iba.iba_memt = &memt->bst;
165
166	/* Allocate ISA port space */
167	iot = hpcmips_alloc_bus_space_tag();
168	offset = device_cfdata(&sc->sc_dev)->cf_loc[VRISABIFCF_ISAPORTOFFSET];
169	hpcmips_init_bus_space(iot,
170	    (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA port",
171	    VR_ISA_PORT_BASE + offset, VR_ISA_PORT_SIZE - offset);
172	iba.iba_iot = &iot->bst;
173
174#ifdef DEBUG_FIND_PCIC
175#warning DEBUG_FIND_PCIC
176	__find_pcic();
177#else
178	/* Initialize ISA IRQ <-> GPIO mapping */
179	for (i = 0; i < INTR_NIRQS; i++)
180		sc->sc_intr_map[i] = -1;
181	printf(": ISA port %#x-%#x mem %#x-%#x\n",
182	    iot->base, iot->base + iot->size,
183	    memt->base, memt->base + memt->size);
184	config_found_ia(self, "isabus", &iba, vrisabprint);
185#endif
186
187#ifdef DEBUG_FIND_COMPORT
188#warning DEBUG_FIND_COMPORT
189	__find_comport();
190#endif
191}
192
193int
194vrisabprint(void *aux, const char *pnp)
195{
196	if (pnp)
197		return (QUIET);
198
199	return (UNCONF);
200}
201
202void
203isa_attach_hook(struct device *parent, struct device *self,
204    struct isabus_attach_args *iba)
205{
206
207}
208
209const struct evcnt *
210isa_intr_evcnt(isa_chipset_tag_t ic, int irq)
211{
212
213	/* XXX for now, no evcnt parent reported */
214	return (NULL);
215}
216
217void *
218isa_intr_establish(isa_chipset_tag_t ic, int intr, int type, int level,
219    int (*ih_fun)(void*), void *ih_arg)
220{
221	struct vrisab_softc *sc = ic->ic_sc;
222	int port, irq, mode;
223
224	static int intr_modes[8] = {
225		HPCIO_INTR_LEVEL_HIGH_THROUGH,
226		HPCIO_INTR_LEVEL_HIGH_HOLD,
227		HPCIO_INTR_LEVEL_LOW_THROUGH,
228		HPCIO_INTR_LEVEL_LOW_HOLD,
229		HPCIO_INTR_EDGE_THROUGH,
230		HPCIO_INTR_EDGE_HOLD,
231		HPCIO_INTR_EDGE_THROUGH,
232		HPCIO_INTR_EDGE_HOLD,
233	};
234#ifdef VRISADEBUG
235	static const char* intr_mode_names[8] = {
236		"level high through",
237		"level high hold",
238		"level low through",
239		"level low hold",
240		"edge through",
241		"edge hold",
242		"edge through",
243		"edge hold",
244	};
245#endif /* VRISADEBUG */
246	/*
247	 * ISA IRQ <-> GPIO port mapping
248	 */
249	irq = INTR_IRQ(intr);
250	if (sc->sc_intr_map[irq] != -1) {
251		/* already mapped */
252		intr = sc->sc_intr_map[irq];
253	} else {
254		/* not mapped yet */
255		sc->sc_intr_map[irq] = intr; /* Register it */
256	}
257	mode = INTR_MODE(intr);
258	port = INTR_PORT(intr);
259
260	VPRINTF(("ISA IRQ %d -> %s port %d, %s\n",
261	    irq, sc->sc_hc->hc_name, port, intr_mode_names[mode]));
262
263	/* Call Vr routine */
264	return (hpcio_intr_establish(sc->sc_hc, port, intr_modes[mode],
265	    ih_fun, ih_arg));
266}
267
268void
269isa_intr_disestablish(ic, arg)
270	isa_chipset_tag_t ic;
271	void *arg;
272{
273	struct vrisab_softc *sc = ic->ic_sc;
274	/* Call Vr routine */
275	hpcio_intr_disestablish(sc->sc_hc, arg);
276}
277
278int
279isa_intr_alloc(isa_chipset_tag_t ic, int mask, int type, int *irq)
280{
281	/* XXX not coded yet. this is temporary XXX */
282	DPRINTF(("isa_intr_alloc:"));
283	DBITDISP(mask);
284	*irq = (ffs(mask) -1); /* XXX */
285
286	return (0);
287}
288
289#ifdef DEBUG_FIND_PCIC
290#warning DEBUG_FIND_PCIC
291static void
292__find_pcic(void)
293{
294	int i, j, step, found;
295	u_int32_t addr;
296	u_int8_t reg;
297	int __read_revid (u_int32_t port)
298	    {
299		    addr = MIPS_PHYS_TO_KSEG1(i + port);
300		    printf("%#x\r", i);
301		    for (found = 0, j = 0; j < 0x100; j += 0x40) {
302			    *((volatile u_int8_t *)addr) = j;
303			    reg = *((volatile u_int8_t *)(addr + 1));
304#ifdef DEBUG_FIND_PCIC_I82365SL_ONLY
305			    if (reg == 0x82 || reg == 0x83) {
306#else
307			    if ((reg & 0xc0) == 0x80) {
308#endif
309					    found++;
310			    }
311			    if (found)
312				    printf("\nfound %d socket at %#x"
313					"(base from %#x)\n", found, addr,
314					i + port - VR_ISA_PORT_BASE);
315		    }
316	    }
317	step = 0x1000000;
318	printf("\nFinding PCIC. Trying ISA port %#x-%#x step %#x\n",
319	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE, step);
320	for (i = VR_ISA_PORT_BASE; i < VR_ISA_PORT_BASE+VR_ISA_PORT_SIZE;
321	    i+= step) {
322		__read_revid (0x3e0);
323		__read_revid (0x3e2);
324	}
325}
326#endif /* DEBUG_FIND_PCIC */
327
328
329#ifdef DEBUG_FIND_COMPORT
330#warning DEBUG_FIND_COMPORT
331
332static int probe_com(u_int32_t);
333
334static int
335probe_com(u_int32_t port_addr)
336{
337	u_int32_t addr;
338	u_int8_t ubtmp1, ubtmp2;
339
340	addr = MIPS_PHYS_TO_KSEG1(port_addr);
341
342	*((volatile u_int8_t *)(addr + com_cfcr)) = LCR_8BITS;
343	*((volatile u_int8_t *)(addr + com_iir)) = 0;
344
345	ubtmp1 = *((volatile u_int8_t *)(addr + com_cfcr));
346	ubtmp2 = *((volatile u_int8_t *)(addr + com_iir));
347
348	if ((ubtmp1 != LCR_8BITS) || ((ubtmp2 & 0x38) != 0)) {
349		return (0);
350	}
351
352	return (1);
353}
354
355static void
356__find_comport()
357{
358	int found;
359	u_int32_t port, step;
360
361	found = 0;
362	step = 0x08;
363
364	printf("Searching COM port. Trying ISA port %#x-%#x step %#x\n",
365	    VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE - 1, step );
366
367	for (port = VR_ISA_PORT_BASE;
368	    port < (VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE); port += step){
369		if (probe_com(port)) {
370			found++;
371			printf("found %d at %#x\n", found, port);
372		}
373	}
374}
375#endif /* DEBUG_FIND_COMPORT */
376