1 /* $OpenBSD: wbsio.c,v 1.12 2022/04/06 18:59:29 naddy Exp $ */
2 /*
3 * Copyright (c) 2008 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /*
19 * Winbond LPC Super I/O driver.
20 */
21
22 #include <sys/param.h>
23 #include <sys/device.h>
24 #include <sys/kernel.h>
25 #include <sys/systm.h>
26
27 #include <machine/bus.h>
28
29 #include <dev/isa/isavar.h>
30 #include <dev/isa/wbsioreg.h>
31
32 #ifdef WBSIO_DEBUG
33 #define DPRINTF(x) printf x
34 #else
35 #define DPRINTF(x)
36 #endif
37
38 struct wbsio_softc {
39 struct device sc_dev;
40
41 bus_space_tag_t sc_iot;
42 bus_space_handle_t sc_ioh;
43 };
44
45 int wbsio_probe(struct device *, void *, void *);
46 void wbsio_attach(struct device *, struct device *, void *);
47 int wbsio_print(void *, const char *);
48
49 const struct cfattach wbsio_ca = {
50 sizeof(struct wbsio_softc),
51 wbsio_probe,
52 wbsio_attach
53 };
54
55 struct cfdriver wbsio_cd = {
56 NULL, "wbsio", DV_DULL
57 };
58
59 static __inline void
wbsio_conf_enable(bus_space_tag_t iot,bus_space_handle_t ioh)60 wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh)
61 {
62 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
63 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
64 }
65
66 static __inline void
wbsio_conf_disable(bus_space_tag_t iot,bus_space_handle_t ioh)67 wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh)
68 {
69 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC);
70 }
71
72 static __inline u_int8_t
wbsio_conf_read(bus_space_tag_t iot,bus_space_handle_t ioh,u_int8_t index)73 wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index)
74 {
75 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
76 return (bus_space_read_1(iot, ioh, WBSIO_DATA));
77 }
78
79 static __inline void
wbsio_conf_write(bus_space_tag_t iot,bus_space_handle_t ioh,u_int8_t index,u_int8_t data)80 wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index,
81 u_int8_t data)
82 {
83 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
84 bus_space_write_1(iot, ioh, WBSIO_DATA, data);
85 }
86
87 int
wbsio_probe(struct device * parent,void * match,void * aux)88 wbsio_probe(struct device *parent, void *match, void *aux)
89 {
90 struct isa_attach_args *ia = aux;
91 bus_space_tag_t iot;
92 bus_space_handle_t ioh;
93 u_int8_t reg;
94
95 /* Match by device ID */
96 iot = ia->ia_iot;
97 if (bus_space_map(iot, ia->ipa_io[0].base, WBSIO_IOSIZE, 0, &ioh))
98 return (0);
99 wbsio_conf_enable(iot, ioh);
100 reg = wbsio_conf_read(iot, ioh, WBSIO_ID);
101 DPRINTF(("wbsio_probe: id 0x%02x\n", reg));
102 wbsio_conf_disable(iot, ioh);
103 bus_space_unmap(iot, ioh, WBSIO_IOSIZE);
104 switch (reg) {
105 case WBSIO_ID_W83627HF:
106 case WBSIO_ID_W83627THF:
107 case WBSIO_ID_W83627EHF:
108 case WBSIO_ID_W83627DHG:
109 case WBSIO_ID_W83627DHGP:
110 case WBSIO_ID_W83627UHG:
111 case WBSIO_ID_W83637HF:
112 case WBSIO_ID_W83697HF:
113 case WBSIO_ID_NCT6775F:
114 case WBSIO_ID_NCT6776F:
115 case WBSIO_ID_NCT5104D:
116 case WBSIO_ID_NCT6779D:
117 case WBSIO_ID_NCT6791D:
118 case WBSIO_ID_NCT6792D:
119 ia->ipa_nio = 1;
120 ia->ipa_io[0].length = WBSIO_IOSIZE;
121 ia->ipa_nmem = 0;
122 ia->ipa_nirq = 0;
123 ia->ipa_ndrq = 0;
124 return (1);
125 }
126
127 return (0);
128 }
129
130 void
wbsio_attach(struct device * parent,struct device * self,void * aux)131 wbsio_attach(struct device *parent, struct device *self, void *aux)
132 {
133 struct wbsio_softc *sc = (void *)self;
134 struct isa_attach_args *ia = aux;
135 struct isa_attach_args nia;
136 u_int8_t devid, reg, reg0, reg1;
137 u_int16_t iobase;
138
139 /* Map ISA I/O space */
140 sc->sc_iot = ia->ia_iot;
141 if (bus_space_map(sc->sc_iot, ia->ipa_io[0].base,
142 WBSIO_IOSIZE, 0, &sc->sc_ioh)) {
143 printf(": can't map i/o space\n");
144 return;
145 }
146
147 /* Enter configuration mode */
148 wbsio_conf_enable(sc->sc_iot, sc->sc_ioh);
149
150 /* Read device ID */
151 devid = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_ID);
152 switch (devid) {
153 case WBSIO_ID_W83627HF:
154 printf(": W83627HF");
155 break;
156 case WBSIO_ID_W83627THF:
157 printf(": W83627THF");
158 break;
159 case WBSIO_ID_W83627EHF:
160 printf(": W83627EHF");
161 break;
162 case WBSIO_ID_W83627DHG:
163 printf(": W83627DHG");
164 break;
165 case WBSIO_ID_W83627DHGP:
166 printf(": W83627DHG-P");
167 break;
168 case WBSIO_ID_W83627UHG:
169 printf(": W83627UHG");
170 break;
171 case WBSIO_ID_W83637HF:
172 printf(": W83637HF");
173 break;
174 case WBSIO_ID_W83697HF:
175 printf(": W83697HF");
176 break;
177 case WBSIO_ID_NCT6775F:
178 printf(": NCT6775F");
179 break;
180 case WBSIO_ID_NCT6776F:
181 printf(": NCT6776F");
182 break;
183 case WBSIO_ID_NCT6779D:
184 printf(": NCT6779D");
185 break;
186 case WBSIO_ID_NCT6791D:
187 printf(": NCT6791D");
188 break;
189 case WBSIO_ID_NCT6792D:
190 printf(": NCT6792D");
191 break;
192 case WBSIO_ID_NCT6793D:
193 printf(": NCT6793D");
194 break;
195 case WBSIO_ID_NCT6795D:
196 printf(": NCT6795D");
197 break;
198 case WBSIO_ID_NCT5104D:
199 printf(": NCT5104D");
200 break;
201 }
202
203 /* Read device revision */
204 reg = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_REV);
205 printf(" rev 0x%02x", reg);
206
207 /* Select HM logical device */
208 wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM);
209
210 /*
211 * The address should be 8-byte aligned, but it seems some
212 * BIOSes ignore this. They get away with it, because
213 * Apparently the hardware simply ignores the lower three
214 * bits. We do the same here.
215 */
216 reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
217 reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);
218 iobase = (reg1 << 8) | (reg0 & ~0x7);
219
220 printf("\n");
221
222 /* Escape from configuration mode */
223 wbsio_conf_disable(sc->sc_iot, sc->sc_ioh);
224
225 if (iobase == 0)
226 return;
227
228 nia = *ia;
229 nia.ia_iobase = iobase;
230 nia.ia_aux = (void *)(u_long)devid; /* pass devid down to wb_match() */
231
232 config_found(self, &nia, wbsio_print);
233 }
234
235 int
wbsio_print(void * aux,const char * pnp)236 wbsio_print(void *aux, const char *pnp)
237 {
238 struct isa_attach_args *ia = aux;
239
240 if (pnp)
241 printf("%s", pnp);
242 if (ia->ia_iosize)
243 printf(" port 0x%x", ia->ia_iobase);
244 if (ia->ia_iosize > 1)
245 printf("/%d", ia->ia_iosize);
246 return (UNCONF);
247 }
248