summaryrefslogtreecommitdiff
path: root/sys/arch/macppc/pci/bandit.c
blob: 7f6afdbc7d5c7b448cb86551dd62671d46998dc1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
/*	$NetBSD: bandit.c,v 1.35 2022/01/21 19:12:28 thorpej Exp $	*/

/*-
 * Copyright (c) 2000 Tsubai Masanari.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bandit.c,v 1.35 2022/01/21 19:12:28 thorpej Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>

#include <dev/pci/pcivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>

#include <machine/autoconf.h>
#include <machine/pci_machdep.h>
#include <machine/pio.h>

struct bandit_softc {
	device_t sc_dev;
	struct genppc_pci_chipset sc_pc;
	struct powerpc_bus_space sc_iot;
	struct powerpc_bus_space sc_memt;
	boolean_t sc_is_chaos;
};

static void bandit_attach(device_t, device_t, void *);
static int bandit_match(device_t, cfdata_t, void *);

static pcireg_t bandit_conf_read(void *, pcitag_t, int);
static void bandit_conf_write(void *, pcitag_t, int, pcireg_t);
static void chaos_conf_write(void *, pcitag_t, int, pcireg_t);

static void bandit_init(struct bandit_softc *);

CFATTACH_DECL_NEW(bandit, sizeof(struct bandit_softc),
    bandit_match, bandit_attach, NULL, NULL);

static int
bandit_match(device_t parent, cfdata_t cf, void *aux)
{
	struct confargs *ca = aux;

	if (strcmp(ca->ca_name, "bandit") == 0 ||
	    strcmp(ca->ca_name, "chaos") == 0)
		return 1;

	return 0;
}

static void
bandit_attach(device_t parent, device_t self, void *aux)
{
	struct bandit_softc *sc = device_private(self);
	pci_chipset_tag_t pc = &sc->sc_pc;
	struct confargs *ca = aux;
	struct pcibus_attach_args pba;
	int len, node = ca->ca_node;
	uint32_t reg[2], busrange[2];
	struct range {
		uint32_t pci_hi, pci_mid, pci_lo;
		uint32_t host;
		uint32_t size_hi, size_lo;
	} ranges[6], *rp = ranges;

	aprint_normal("\n");
	sc->sc_dev = self;

	sc->sc_is_chaos = (strcmp(ca->ca_name, "chaos") == 0);

	/* Bandit address */
	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
		return;

	/* PCI bus number */
	if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
		return;

	/* find i/o tag */
	len = OF_getprop(node, "ranges", ranges, sizeof(ranges));
	if (len == -1)
		return;
	while (len >= sizeof(ranges[0])) {
		if ((rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) ==
		     OFW_PCI_PHYS_HI_SPACE_IO) {
			sc->sc_iot.pbs_base = rp->host;
			sc->sc_iot.pbs_limit = rp->host + rp->size_lo;
			break;
		}
		len -= sizeof(ranges[0]);
		rp++;
	}
	memset(&sc->sc_iot, 0, sizeof(struct powerpc_bus_space));
	memset(&sc->sc_memt, 0, sizeof(struct powerpc_bus_space));
	sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE;
	if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot,
	    "bandit io-space") != 0)
		panic("Can't init bandit io tag");

	sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE;
	if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, node, &sc->sc_memt,
	    "bandit mem-space") != 0)
		panic("Can't init bandit mem tag");

	macppc_pci_get_chipset_tag(pc);
	pc->pc_node = node;
	pc->pc_iot = &sc->sc_iot;
	pc->pc_memt = &sc->sc_memt;
	pc->pc_addr = mapiodev(reg[0] + 0x800000, 4, false);
	pc->pc_data = mapiodev(reg[0] + 0xc00000, 8, false);
	pc->pc_bus = busrange[0];
	pc->pc_conf_read = bandit_conf_read;
	if (sc->sc_is_chaos) {
		pc->pc_conf_write = chaos_conf_write;
	} else
		pc->pc_conf_write = bandit_conf_write;

	bandit_init(sc);

	memset(&pba, 0, sizeof(pba));
	pba.pba_memt = pc->pc_memt;
	pba.pba_iot = pc->pc_iot;
	pba.pba_dmat = &pci_bus_dma_tag;
	pba.pba_dmat64 = NULL;
	pba.pba_bus = pc->pc_bus;
	pba.pba_bridgetag = NULL;
	pba.pba_pc = pc;
	pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;

	config_found(self, &pba, pcibusprint,
	    CFARGS(.devhandle = device_handle(self)));
}

static pcireg_t
bandit_conf_read(void *cookie, pcitag_t tag, int reg)
{
	pci_chipset_tag_t pc = cookie;
	pcireg_t data;
	int bus, dev, func, s;
	uint32_t x;

	if ((unsigned int)reg >= PCI_CONF_SIZE)
		return (pcireg_t) -1;

	pci_decompose_tag(pc, tag, &bus, &dev, &func);

	/*
	 * bandit's minimum device number of the first bus is 11.
	 * So we behave as if there is no device when dev < 11.
	 */
	if (func > 7)
		panic("pci_conf_read: func > 7");

	if (bus == pc->pc_bus) {
		if (dev < 11)
			return 0xffffffff;
		x = (1 << dev) | (func << 8) | reg;
	} else
		x = tag | reg | 1;

	s = splhigh();

	out32rb(pc->pc_addr, x);
	DELAY(10);
	data = 0xffffffff;
	if (!badaddr(pc->pc_data, 4))
		data = in32rb(pc->pc_data);
	DELAY(10);
	out32rb(pc->pc_addr, 0);
	DELAY(10);

	splx(s);

	return data;
}

static void
bandit_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
{
	pci_chipset_tag_t pc = cookie;
	int bus, dev, func, s;
	u_int32_t x;

	if ((unsigned int)reg >= PCI_CONF_SIZE)
		return;

	pci_decompose_tag(pc, tag, &bus, &dev, &func);

	if (func > 7)
		panic("pci_conf_write: func > 7");

	if (bus == pc->pc_bus) {
		if (dev < 11)
			panic("pci_conf_write: dev < 11");
		x = (1 << dev) | (func << 8) | reg;
	} else
		x = tag | reg | 1;

	s = splhigh();

	out32rb(pc->pc_addr, x);
	DELAY(10);
	out32rb(pc->pc_data, data);
	DELAY(10);
	out32rb(pc->pc_addr, 0);
	DELAY(10);

	splx(s);
}

/*
 * XXX
 * /chaos really hates writes to config space, so we just don't do them
 */
static void
chaos_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
{
}

#define	PCI_BANDIT		11

#define	PCI_REG_MODE_SELECT	0x50

#define	PCI_MODE_IO_COHERENT	0x040	/* I/O coherent */

static void
bandit_init(struct bandit_softc *sc)
{
	pci_chipset_tag_t pc = &sc->sc_pc;
	pcitag_t tag;
	u_int mode;

	tag = pci_make_tag(pc, pc->pc_bus, PCI_BANDIT, 0);
	if ((pci_conf_read(pc, tag, PCI_ID_REG) & 0xffff) == 0xffff)
		return;

	mode = pci_conf_read(pc, tag, PCI_REG_MODE_SELECT);

	if ((mode & PCI_MODE_IO_COHERENT) == 0) {
		mode |= PCI_MODE_IO_COHERENT;
		pci_conf_write(pc, tag, PCI_REG_MODE_SELECT, mode);
	}
}