1 /* $NetBSD: wbsio.c,v 1.1 2010/02/21 05:16:29 cnst Exp $ */
2 /* $OpenBSD: wbsio.c,v 1.5 2009/03/29 21:53:52 sthen Exp $ */
4 * Copyright (c) 2008 Mark Kettenis <kettenis@openbsd.org>
5 * Copyright (c) 2010 Constantine A. Murenin <cnst++@dragonflybsd.org>
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 * Winbond LPC Super I/O driver.
24 #include <sys/param.h>
26 #include <sys/kernel.h>
27 #include <sys/module.h>
29 #include <sys/systm.h>
31 #include <bus/isa/isavar.h>
33 /* ISA bus registers */
34 #define WBSIO_INDEX 0x00 /* Configuration Index Register */
35 #define WBSIO_DATA 0x01 /* Configuration Data Register */
37 #define WBSIO_IOSIZE 0x02 /* ISA I/O space size */
39 #define WBSIO_CONF_EN_MAGIC 0x87 /* enable configuration mode */
40 #define WBSIO_CONF_DS_MAGIC 0xaa /* disable configuration mode */
42 /* Configuration Space Registers */
43 #define WBSIO_LDN 0x07 /* Logical Device Number */
44 #define WBSIO_ID 0x20 /* Device ID */
45 #define WBSIO_REV 0x21 /* Device Revision */
47 #define WBSIO_ID_W83627HF 0x52
48 #define WBSIO_ID_W83627THF 0x82
49 #define WBSIO_ID_W83627EHF 0x88
50 #define WBSIO_ID_W83627DHG 0xa0
51 #define WBSIO_ID_W83627SF 0x59
52 #define WBSIO_ID_W83637HF 0x70
53 #define WBSIO_ID_W83667HG 0xa5
54 #define WBSIO_ID_W83697HF 0x60
56 /* Logical Device Number (LDN) Assignments */
57 #define WBSIO_LDN_HM 0x0b
59 /* Hardware Monitor Control Registers (LDN B) */
60 #define WBSIO_HM_ADDR_MSB 0x60 /* Address [15:8] */
61 #define WBSIO_HM_ADDR_LSB 0x61 /* Address [7:0] */
64 struct device *sc_dev;
66 struct resource *sc_iores;
69 bus_space_tag_t sc_iot;
70 bus_space_handle_t sc_ioh;
73 static int wbsio_probe(struct device *);
74 static int wbsio_attach(struct device *);
75 static int wbsio_detach(struct device *);
77 static device_method_t wbsio_methods[] = {
78 DEVMETHOD(device_probe, wbsio_probe),
79 DEVMETHOD(device_attach, wbsio_attach),
80 DEVMETHOD(device_detach, wbsio_detach),
85 static driver_t wbsio_driver = {
88 sizeof(struct wbsio_softc)
91 static devclass_t wbsio_devclass;
93 DRIVER_MODULE(wbsio, isa, wbsio_driver, wbsio_devclass, NULL, NULL);
97 wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh)
99 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
100 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
104 wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh)
106 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC);
109 static __inline u_int8_t
110 wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index)
112 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
113 return (bus_space_read_1(iot, ioh, WBSIO_DATA));
117 wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index,
120 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
121 bus_space_write_1(iot, ioh, WBSIO_DATA, data);
125 wbsio_probe(struct device *dev)
127 struct resource *iores;
130 bus_space_handle_t ioh;
131 uint8_t reg_id, reg_rev;
132 const char *desc = NULL;
135 /* Match by device ID */
137 iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &iorid,
138 0ul, ~0ul, WBSIO_IOSIZE,
142 iot = rman_get_bustag(iores);
143 ioh = rman_get_bushandle(iores);
145 wbsio_conf_enable(iot, ioh);
147 reg_id = wbsio_conf_read(iot, ioh, WBSIO_ID);
148 /* Read device revision */
149 reg_rev = wbsio_conf_read(iot, ioh, WBSIO_REV);
150 wbsio_conf_disable(iot, ioh);
151 bus_release_resource(dev, SYS_RES_IOPORT, iorid, iores);
154 case WBSIO_ID_W83627HF:
157 case WBSIO_ID_W83627THF:
160 case WBSIO_ID_W83627EHF:
163 case WBSIO_ID_W83627DHG:
166 case WBSIO_ID_W83637HF:
169 case WBSIO_ID_W83667HG:
172 case WBSIO_ID_W83697HF:
180 ksnprintf(fulldesc, sizeof(fulldesc),
181 "Winbond LPC Super I/O %s rev 0x%02x", desc, reg_rev);
182 device_set_desc_copy(dev, fulldesc);
187 wbsio_attach(struct device *dev)
189 struct wbsio_softc *sc = device_get_softc(dev);
192 struct device *parent = device_get_parent(dev);
193 struct device *child;
194 struct devclass *c_dc;
197 /* Map ISA I/O space */
198 sc->sc_iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->sc_iorid,
199 0ul, ~0ul, WBSIO_IOSIZE,
201 if (sc->sc_iores == NULL) {
202 device_printf(dev, "can't map i/o space\n");
205 sc->sc_iot = rman_get_bustag(sc->sc_iores);
206 sc->sc_ioh = rman_get_bushandle(sc->sc_iores);
208 /* Enter configuration mode */
209 wbsio_conf_enable(sc->sc_iot, sc->sc_ioh);
211 /* Select HM logical device */
212 wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM);
215 * The address should be 8-byte aligned, but it seems some
216 * BIOSes ignore this. They get away with it, because
217 * Apparently the hardware simply ignores the lower three
218 * bits. We do the same here.
220 reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
221 reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);
222 iobase = (reg1 << 8) | (reg0 & ~0x7);
223 device_printf(dev, "hardware monitor iobase is 0x%x\n", iobase);
225 /* Escape from configuration mode */
226 wbsio_conf_disable(sc->sc_iot, sc->sc_ioh);
229 device_printf(dev, "no hardware monitor configured\n");
234 c_dc = devclass_find("lm");
236 device_printf(dev, "lm devclass not found\n");
239 c_maxunit = devclass_get_maxunit(c_dc);
240 for (int u = 0; u < c_maxunit; u++) {
241 child = devclass_get_device(c_dc, u);
244 if (isa_get_port(child) == iobase) {
245 if (device_is_attached(child)) {
247 "%s is already attached at 0x%x\n",
248 device_get_nameunit(child), iobase);
253 if (device_is_attached(child)) {
258 "found unused %s at 0x%x with state %i, reusing at 0x%x\n",
259 device_get_nameunit(child), isa_get_port(child),
260 device_get_state(child), iobase);
264 child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
266 // child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
267 // "lm", 3 + device_get_unit(dev));
269 device_printf(dev, "cannot add child\n");
272 if (bus_set_resource(child, SYS_RES_IOPORT, 0, iobase, 8)) {
273 device_printf(dev, "cannot set resource\n");
276 return device_probe_and_attach(child);
280 wbsio_detach(struct device *dev)
282 struct wbsio_softc *sc = device_get_softc(dev);
284 return bus_release_resource(dev, SYS_RES_IOPORT,
285 sc->sc_iorid, sc->sc_iores);