1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (C) 2003
5 * Hidetoshi Shimokawa. 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 *
18 * This product includes software developed by Hidetoshi Shimokawa.
19 *
20 * 4. Neither the name of the author nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * $Id: dcons_crom.c,v 1.8 2003/10/23 15:47:21 simokawa Exp $
37 * $FreeBSD$
38 */
39
40 #include <sys/param.h>
41 #include <sys/eventhandler.h>
42 #include <sys/kernel.h>
43 #include <sys/module.h>
44 #include <sys/systm.h>
45 #include <sys/types.h>
46 #include <sys/conf.h>
47 #include <sys/malloc.h>
48
49 #include <sys/bus.h>
50 #include <machine/bus.h>
51
52 #include <dev/firewire/firewire.h>
53 #include <dev/firewire/firewirereg.h>
54 #include <dev/firewire/iec13213.h>
55 #include <dev/dcons/dcons.h>
56 #include <dev/dcons/dcons_os.h>
57
58 #include <sys/cons.h>
59
60 #if (defined(__i386__) || defined(__amd64__))
61 #include <vm/vm.h>
62 #include <vm/vm_param.h>
63 #include <vm/pmap.h>
64 #include <machine/segments.h> /* for idt */
65 #endif
66
67 static bus_addr_t dcons_paddr;
68
69 static int force_console = 0;
70 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
71
72 #define ADDR_HI(x) (((x) >> 24) & 0xffffff)
73 #define ADDR_LO(x) ((x) & 0xffffff)
74
75 struct dcons_crom_softc {
76 struct firewire_dev_comm fd;
77 struct crom_chunk unit;
78 struct crom_chunk spec;
79 struct crom_chunk ver;
80 bus_dma_tag_t dma_tag;
81 bus_dmamap_t dma_map;
82 bus_addr_t bus_addr;
83 eventhandler_tag ehand;
84 };
85
86 static void
87 dcons_crom_identify(driver_t *driver, device_t parent)
88 {
89 BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
90 }
91
92 static int
93 dcons_crom_probe(device_t dev)
94 {
95 device_t pa;
96
97 pa = device_get_parent(dev);
98 if(device_get_unit(dev) != device_get_unit(pa)){
99 return(ENXIO);
100 }
101
102 device_set_desc(dev, "dcons configuration ROM");
103 return (0);
104 }
105
106 #if (defined(__i386__) || defined(__amd64__))
107 static void
108 dcons_crom_expose_idt(struct dcons_crom_softc *sc)
109 {
110 static off_t idt_paddr;
111
112 /* XXX */
113 #ifdef __amd64__
114 idt_paddr = (char *)idt - (char *)KERNBASE;
115 #else /* __i386__ */
116 idt_paddr = (off_t)pmap_kextract((vm_offset_t)idt);
117 #endif
118
119 crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
120 crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
121 }
122 #endif
123
124 static void
125 dcons_crom_post_busreset(void *arg)
126 {
127 struct dcons_crom_softc *sc;
128 struct crom_src *src;
129 struct crom_chunk *root;
130
131 sc = (struct dcons_crom_softc *) arg;
132 src = sc->fd.fc->crom_src;
133 root = sc->fd.fc->crom_root;
134
135 bzero(&sc->unit, sizeof(struct crom_chunk));
136
137 crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
138 crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
139 crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
140 crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
141 crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
142 crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
143 crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
144 #if (defined(__i386__) || defined(__amd64__))
145 dcons_crom_expose_idt(sc);
146 #endif
147 }
148
149 static void
150 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
151 {
152 struct dcons_crom_softc *sc;
153
154 if (error)
155 printf("dcons_dmamap_cb: error=%d\n", error);
156
157 sc = (struct dcons_crom_softc *)arg;
158 sc->bus_addr = segments[0].ds_addr;
159
160 bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
161 device_printf(sc->fd.dev,
162 "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
163 if (dcons_paddr != 0) {
164 /* XXX */
165 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
166 return;
167 }
168 dcons_conf->dma_tag = sc->dma_tag;
169 dcons_conf->dma_map = sc->dma_map;
170 dcons_paddr = sc->bus_addr;
171
172 /* Force to be the high-level console */
173 if (force_console)
174 cnselect(dcons_conf->cdev);
175 }
176
177 static void
178 dcons_crom_poll(void *p, int arg)
179 {
180 struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
181
182 sc->fd.fc->poll(sc->fd.fc, -1, -1);
183 }
184
185 static int
186 dcons_crom_attach(device_t dev)
187 {
188 struct dcons_crom_softc *sc;
189 int error;
190
191 if (dcons_conf->buf == NULL)
192 return (ENXIO);
193 sc = (struct dcons_crom_softc *) device_get_softc(dev);
194 sc->fd.fc = device_get_ivars(dev);
195 sc->fd.dev = dev;
196 sc->fd.post_explore = NULL;
197 sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
198
199 /* map dcons buffer */
200 error = bus_dma_tag_create(
201 /*parent*/ sc->fd.fc->dmat,
202 /*alignment*/ sizeof(u_int32_t),
203 /*boundary*/ 0,
204 /*lowaddr*/ BUS_SPACE_MAXADDR,
205 /*highaddr*/ BUS_SPACE_MAXADDR,
206 /*filter*/NULL, /*filterarg*/NULL,
207 /*maxsize*/ dcons_conf->size,
208 /*nsegments*/ 1,
209 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
210 /*flags*/ BUS_DMA_ALLOCNOW,
211 /*lockfunc*/busdma_lock_mutex,
212 /*lockarg*/&Giant,
213 &sc->dma_tag);
214 if (error != 0)
215 return (error);
216 error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
217 if (error != 0)
218 return (error);
219 error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
220 (void *)dcons_conf->buf, dcons_conf->size,
221 dmamap_cb, sc, 0);
222 if (error != 0)
223 return (error);
224 sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
225 (void *)sc, 0);
226 return (0);
227 }
228
229 static int
230 dcons_crom_detach(device_t dev)
231 {
232 struct dcons_crom_softc *sc;
233
234 sc = (struct dcons_crom_softc *) device_get_softc(dev);
235 sc->fd.post_busreset = NULL;
236
237 if (sc->ehand)
238 EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
239
240 /* XXX */
241 if (dcons_conf->dma_tag == sc->dma_tag)
242 dcons_conf->dma_tag = NULL;
243
244 bus_dmamap_unload(sc->dma_tag, sc->dma_map);
245 bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
246 bus_dma_tag_destroy(sc->dma_tag);
247
248 return 0;
249 }
250
251 static device_method_t dcons_crom_methods[] = {
252 /* device interface */
253 DEVMETHOD(device_identify, dcons_crom_identify),
254 DEVMETHOD(device_probe, dcons_crom_probe),
255 DEVMETHOD(device_attach, dcons_crom_attach),
256 DEVMETHOD(device_detach, dcons_crom_detach),
257 { 0, 0 }
258 };
259
260 static driver_t dcons_crom_driver = {
261 "dcons_crom",
262 dcons_crom_methods,
263 sizeof(struct dcons_crom_softc),
264 };
265
266 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver, 0, 0);
267 MODULE_VERSION(dcons_crom, 1);
268 MODULE_DEPEND(dcons_crom, dcons,
269 DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
270 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);
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