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_W83627DHGP 0xb0
52 #define WBSIO_ID_W83627SF 0x59
53 #define WBSIO_ID_W83627UHG 0xa2
54 #define WBSIO_ID_W83637HF 0x70
55 #define WBSIO_ID_W83667HG 0xa5
56 #define WBSIO_ID_W83687THF 0x85
57 #define WBSIO_ID_W83697HF 0x60
59 /* Logical Device Number (LDN) Assignments */
60 #define WBSIO_LDN_HM 0x0b
62 /* Hardware Monitor Control Registers (LDN B) */
63 #define WBSIO_HM_ADDR_MSB 0x60 /* Address [15:8] */
64 #define WBSIO_HM_ADDR_LSB 0x61 /* Address [7:0] */
67 struct device *sc_dev;
69 struct resource *sc_iores;
72 bus_space_tag_t sc_iot;
73 bus_space_handle_t sc_ioh;
76 static void wbsio_identify(driver_t *, struct device *);
77 static int wbsio_probe(struct device *);
78 static int wbsio_attach(struct device *);
79 static int wbsio_detach(struct device *);
81 static device_method_t wbsio_methods[] = {
82 DEVMETHOD(device_identify, wbsio_identify),
83 DEVMETHOD(device_probe, wbsio_probe),
84 DEVMETHOD(device_attach, wbsio_attach),
85 DEVMETHOD(device_detach, wbsio_detach),
90 static driver_t wbsio_driver = {
93 sizeof(struct wbsio_softc)
96 static devclass_t wbsio_devclass;
98 DRIVER_MODULE(wbsio, isa, wbsio_driver, wbsio_devclass, NULL, NULL);
102 wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh)
104 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
105 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
109 wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh)
111 bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC);
114 static __inline u_int8_t
115 wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index)
117 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
118 return (bus_space_read_1(iot, ioh, WBSIO_DATA));
122 wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index,
125 bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
126 bus_space_write_1(iot, ioh, WBSIO_DATA, data);
130 wbsio_identify(driver_t *driver, struct device *parent)
133 struct device *child[2];
134 const int port[2] = { 0x2e, 0x4e };
136 for (int i = 0; i < 2; i++) {
137 child[i] = device_find_child(parent, driver->name, i);
138 if (child[i] == NULL) {
139 child[i] = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
141 if (child[i] == NULL) {
142 kprintf("%s: cannot add child[%i]\n",
148 if (bus_set_resource(child[i], SYS_RES_IOPORT, 0,
149 port[i], WBSIO_IOSIZE, -1))
150 kprintf("%s: cannot set resource for child[%i]\n",
157 wbsio_probe(struct device *dev)
159 struct resource *iores;
162 bus_space_handle_t ioh;
163 uint8_t reg_id, reg_rev;
164 const char *desc = NULL;
167 /* Match by device ID */
169 iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &iorid,
170 0ul, ~0ul, WBSIO_IOSIZE,
174 iot = rman_get_bustag(iores);
175 ioh = rman_get_bushandle(iores);
177 wbsio_conf_enable(iot, ioh);
179 reg_id = wbsio_conf_read(iot, ioh, WBSIO_ID);
180 /* Read device revision */
181 reg_rev = wbsio_conf_read(iot, ioh, WBSIO_REV);
182 wbsio_conf_disable(iot, ioh);
183 bus_release_resource(dev, SYS_RES_IOPORT, iorid, iores);
186 case WBSIO_ID_W83627HF:
189 case WBSIO_ID_W83627THF:
192 case WBSIO_ID_W83627EHF:
195 case WBSIO_ID_W83627DHG:
198 case WBSIO_ID_W83627DHGP:
199 desc = "W83627DHG-P";
201 case WBSIO_ID_W83627UHG:
204 case WBSIO_ID_W83637HF:
207 case WBSIO_ID_W83667HG:
210 case WBSIO_ID_W83687THF:
213 case WBSIO_ID_W83697HF:
222 if (!(reg_id == 0xff && reg_rev == 0xff))
223 device_printf(dev, "%s port 0x%02x: "
224 "Device ID 0x%02x, Rev 0x%02x\n",
225 __func__, isa_get_port(dev),
230 ksnprintf(fulldesc, sizeof(fulldesc),
231 "Winbond LPC Super I/O %s rev 0x%02x", desc, reg_rev);
232 device_set_desc_copy(dev, fulldesc);
237 wbsio_attach(struct device *dev)
239 struct wbsio_softc *sc = device_get_softc(dev);
242 struct device *parent = device_get_parent(dev);
243 struct device *child;
244 struct devclass *c_dc;
247 /* Map ISA I/O space */
248 sc->sc_iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->sc_iorid,
249 0ul, ~0ul, WBSIO_IOSIZE,
251 if (sc->sc_iores == NULL) {
252 device_printf(dev, "can't map i/o space\n");
255 sc->sc_iot = rman_get_bustag(sc->sc_iores);
256 sc->sc_ioh = rman_get_bushandle(sc->sc_iores);
258 /* Enter configuration mode */
259 wbsio_conf_enable(sc->sc_iot, sc->sc_ioh);
261 /* Select HM logical device */
262 wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM);
265 * The address should be 8-byte aligned, but it seems some
266 * BIOSes ignore this. They get away with it, because
267 * Apparently the hardware simply ignores the lower three
268 * bits. We do the same here.
270 reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
271 reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);
272 iobase = (reg1 << 8) | (reg0 & ~0x7);
273 device_printf(dev, "hardware monitor iobase is 0x%x\n", iobase);
275 /* Escape from configuration mode */
276 wbsio_conf_disable(sc->sc_iot, sc->sc_ioh);
279 device_printf(dev, "no hardware monitor configured\n");
284 c_dc = devclass_find("lm");
286 device_printf(dev, "lm devclass not found\n");
289 c_maxunit = devclass_get_maxunit(c_dc);
290 for (int u = 0; u < c_maxunit; u++) {
291 child = devclass_get_device(c_dc, u);
294 if (isa_get_port(child) == iobase) {
295 if (device_is_attached(child)) {
297 "%s is already attached at 0x%x\n",
298 device_get_nameunit(child), iobase);
303 if (device_is_attached(child)) {
308 "found unused %s at 0x%x with state %i, reusing at 0x%x\n",
309 device_get_nameunit(child), isa_get_port(child),
310 device_get_state(child), iobase);
314 child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
316 // child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
317 // "lm", 3 + device_get_unit(dev));
319 device_printf(dev, "cannot add child\n");
322 if (bus_set_resource(child, SYS_RES_IOPORT, 0, iobase, 8, -1)) {
323 device_printf(dev, "cannot set resource\n");
326 return device_probe_and_attach(child);
330 wbsio_detach(struct device *dev)
332 struct wbsio_softc *sc = device_get_softc(dev);
334 return bus_release_resource(dev, SYS_RES_IOPORT,
335 sc->sc_iorid, sc->sc_iores);