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sys/dev/superio/superio.c

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/*
* Copyright (c) 2016 Andriy Gapon
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 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 OR CONTRIBUTORS 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>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/time.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#include <dev/superio/superio.h>
#include "isa_if.h"
typedef void (*sio_conf_enter_f)(struct resource*, uint16_t);
typedef void (*sio_conf_exit_f)(struct resource*, uint16_t);
impUnsubmitted
Not Done
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I know that sio stands for super I/O here, but sio was the serial driver for years and there's an immediate reaction to it :)

imp: I know that sio stands for super I/O here, but sio was the serial driver for years and there's…
avgAuthorUnsubmitted
Not Done
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Yes, I know. I used the full name in the interface, but decided that using the shorthand is acceptable for the implementation.
Not a problem to do s/sio/superio/ if that would be preferred.

avg: Yes, I know. I used the full name in the interface, but decided that using the shorthand is…
struct sio_conf_methods {
sio_conf_enter_f enter;
sio_conf_exit_f exit;
superio_vendor_t vendor;
};
struct sio_device {
uint8_t ldn;
superio_dev_type_t type;
};
struct superio_devinfo {
STAILQ_ENTRY(superio_devinfo) link;
struct resource_list resources;
device_t dev;
uint8_t ldn;
superio_dev_type_t type;
uint16_t iobase;
uint16_t iobase2;
uint8_t irq;
uint8_t dma;
};
struct siosc {
struct mtx conf_lock;
STAILQ_HEAD(, superio_devinfo) devlist;
struct resource* io_res;
int io_rid;
uint16_t io_port;
const struct sio_conf_methods *methods;
const struct sio_device *known_devices;
superio_vendor_t vendor;
uint16_t devid;
uint8_t revid;
uint8_t current_ldn;
uint8_t ldn_reg;
uint8_t enable_reg;
};
#define NUMPORTS 2
static uint8_t
sio_read(struct resource* res, uint8_t reg)
{
bus_write_1(res, 0, reg);
return (bus_read_1(res, 1));
}
/* Read a word from two one-byte registers, big endian. */
static uint16_t
sio_readw(struct resource* res, uint8_t reg)
{
uint16_t v;
v = sio_read(res, reg);
v <<= 8;
v |= sio_read(res, reg + 1);
return (v);
}
static void
sio_write(struct resource* res, uint8_t reg, uint8_t val)
{
bus_write_1(res, 0, reg);
bus_write_1(res, 1, val);
}
static void
sio_ldn_select(struct siosc *sc, uint8_t ldn)
{
mtx_assert(&sc->conf_lock, MA_OWNED);
if (ldn == sc->current_ldn)
return;
sio_write(sc->io_res, sc->ldn_reg, ldn);
sc->current_ldn = ldn;
}
static uint8_t
sio_ldn_read(struct siosc *sc, uint8_t ldn, uint8_t reg)
{
mtx_assert(&sc->conf_lock, MA_OWNED);
if (reg >= sc->enable_reg) {
sio_ldn_select(sc, ldn);
KASSERT(sc->current_ldn == ldn, ("sio_ldn_select failed"));
}
return (sio_read(sc->io_res, reg));
}
static uint16_t
sio_ldn_readw(struct siosc *sc, uint8_t ldn, uint8_t reg)
{
mtx_assert(&sc->conf_lock, MA_OWNED);
if (reg >= sc->enable_reg) {
sio_ldn_select(sc, ldn);
KASSERT(sc->current_ldn == ldn, ("sio_ldn_select failed"));
}
return (sio_readw(sc->io_res, reg));
}
static void
sio_ldn_write(struct siosc *sc, uint8_t ldn, uint8_t reg, uint8_t val)
{
mtx_assert(&sc->conf_lock, MA_OWNED);
if (reg <= sc->ldn_reg) {
printf("ignored attempt to write special register 0x%x\n", reg);
return;
}
sio_ldn_select(sc, ldn);
KASSERT(sc->current_ldn == ldn, ("sio_ldn_select failed"));
sio_write(sc->io_res, reg, val);
}
static void
sio_conf_enter(struct siosc *sc)
{
mtx_lock(&sc->conf_lock);
sc->methods->enter(sc->io_res, sc->io_port);
}
static void
sio_conf_exit(struct siosc *sc)
{
sc->methods->exit(sc->io_res, sc->io_port);
mtx_unlock(&sc->conf_lock);
}
static void
ite_conf_enter(struct resource* res, uint16_t port)
{
bus_write_1(res, 0, 0x87);
bus_write_1(res, 0, 0x01);
bus_write_1(res, 0, 0x55);
bus_write_1(res, 0, port == 0x2e ? 0x55 : 0xaa);
}
static void
ite_conf_exit(struct resource* res, uint16_t port)
{
sio_write(res, 0x02, 0x02);
}
static const struct sio_conf_methods ite_conf_methods = {
.enter = ite_conf_enter,
.exit = ite_conf_exit,
.vendor = SUPERIO_VENDOR_ITE
};
static void
nvt_conf_enter(struct resource* res, uint16_t port)
{
bus_write_1(res, 0, 0x87);
bus_write_1(res, 0, 0x87);
}
static void
nvt_conf_exit(struct resource* res, uint16_t port)
{
bus_write_1(res, 0, 0xaa);
}
static const struct sio_conf_methods nvt_conf_methods = {
.enter = nvt_conf_enter,
.exit = nvt_conf_exit,
.vendor = SUPERIO_VENDOR_NUVOTON
};
static const struct sio_conf_methods * const methods_table[] = {
&ite_conf_methods,
&nvt_conf_methods,
NULL
};
static const uint16_t ports_table[] = {
0x2e, 0x4e, 0
};
const struct sio_device ite_devices[] = {
{ .ldn = 4, .type = SUPERIO_DEV_HWM },
{ .ldn = 7, .type = SUPERIO_DEV_WDT },
{ .type = SUPERIO_DEV_NONE },
};
const struct sio_device nvt_devices[] = {
{ .ldn = 8, .type = SUPERIO_DEV_WDT },
{ .type = SUPERIO_DEV_NONE },
};
const struct sio_device nct5104_devices[] = {
{ .ldn = 7, .type = SUPERIO_DEV_GPIO },
{ .ldn = 8, .type = SUPERIO_DEV_WDT },
{ .ldn = 15, .type = SUPERIO_DEV_GPIO },
{ .type = SUPERIO_DEV_NONE },
};
static const struct {
superio_vendor_t vendor;
uint16_t devid;
uint16_t mask;
const char *descr;
const struct sio_device *devices;
impUnsubmitted
Done
Inline Actions

Other drivers that do identify will put extra code to prevent that. Though looking at the probe routine it looks like this might be difficult...

imp: Other drivers that do identify will put extra code to prevent that. Though looking at the probe…
avgAuthorUnsubmitted
Done
Inline Actions

I see that wbwd driver has to solve a similar problem. I'm not sure if I like its solution, but it certainly works.
Essentially, the low level I/O methods accept both an IO resource and a numeric port. So they can be used both before a device is created and after resources are set up.

Maybe the following could work?
The device_probe method is reduced to always returning success. Instead the current probe code is called directly from the identify method with a child device. If probing fails then the device is removed.

avg: I see that `wbwd` driver has to solve a similar problem. I'm not sure if I like its solution…
} superio_table[] = {
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8712,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8716,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8718,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8720,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8721,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8726,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8728,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8771,
.devices = ite_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x1061, .mask = 0x00,
.descr = "Nuvoton NCT5104D/NCT6102D/NCT6106D (rev. A)",
.devices = nct5104_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x5200, .mask = 0xff,
.descr = "Winbond 83627HF/F/HG/G",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x5900, .mask = 0xff,
.descr = "Winbond 83627S",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x6000, .mask = 0xff,
.descr = "Winbond 83697HF",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x6800, .mask = 0xff,
.descr = "Winbond 83697UG",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x7000, .mask = 0xff,
impUnsubmitted
Done
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How do we even get here? We continue a few lines up if vendor != ITE, so how can it be NUVOTON here?

imp: How do we even get here? We continue a few lines up if vendor != ITE, so how can it be NUVOTON…
avgAuthorUnsubmitted
Done
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It's a place holder for when the Nuvoton support is added. Just so that I don't forget that the device ID is read differently (some register but byte vs word).

avg: It's a place holder for when the Nuvoton support is added. Just so that I don't forget that the…
.descr = "Winbond 83637HF",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x8200, .mask = 0xff,
.descr = "Winbond 83627THF",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x8500, .mask = 0xff,
.descr = "Winbond 83687THF",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0x8800, .mask = 0xff,
.descr = "Winbond 83627EHF",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xa000, .mask = 0xff,
.descr = "Winbond 83627DHG",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xa200, .mask = 0xff,
.descr = "Winbond 83627UHG",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xa500, .mask = 0xff,
.descr = "Winbond 83667HG",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xb000, .mask = 0xff,
.descr = "Winbond 83627DHG-P",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xb300, .mask = 0xff,
.descr = "Winbond 83667HG-B",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xb400, .mask = 0xff,
.descr = "Nuvoton NCT6775",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xc300, .mask = 0xff,
.descr = "Nuvoton NCT6776",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xc400, .mask = 0xff,
.descr = "Nuvoton NCT5104D/NCT6102D/NCT6106D (rev. B+)",
.devices = nct5104_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xc500, .mask = 0xff,
.descr = "Nuvoton NCT6779",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xc800, .mask = 0xff,
.descr = "Nuvoton NCT6791",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xc900, .mask = 0xff,
.descr = "Nuvoton NCT6792",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xd100, .mask = 0xff,
.descr = "Nuvoton NCT6793",
.devices = nvt_devices,
},
{
.vendor = SUPERIO_VENDOR_NUVOTON, .devid = 0xd300, .mask = 0xff,
.descr = "Nuvoton NCT6795",
.devices = nvt_devices,
},
{ 0, 0 }
};
static const char *
devtype_to_str(superio_dev_type_t type)
{
switch (type) {
case SUPERIO_DEV_NONE:
return ("invalid");
case SUPERIO_DEV_HWM:
return ("HWM");
case SUPERIO_DEV_WDT:
return ("WDT");
case SUPERIO_DEV_GPIO:
return ("GPIO");
case SUPERIO_DEV_MAX:
return ("invalid");
}
}
static int
superio_detect(device_t dev, bool claim, struct siosc *sc)
{
struct resource *res;
rman_res_t port;
rman_res_t count;
uint16_t devid;
uint8_t revid;
int error;
int rid;
int i, m;
error = bus_get_resource(dev, SYS_RES_IOPORT, 0, &port, &count);
if (error != 0)
return (error);
if (port > UINT16_MAX || count < NUMPORTS) {
device_printf(dev, "unexpected I/O range size\n");
return (ENXIO);
}
/*
* Make a temporary resource reservation for hardware probing.
* If we can't get the resources we need then
* we need to abort. Possibly this indicates
* the resources were used by another device
* in which case the probe would have failed anyhow.
*/
rid = 0;
res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
if (res == NULL) {
if (claim)
device_printf(dev, "failed to allocate I/O resource\n");
return (ENXIO);
}
for (m = 0; methods_table[m] != NULL; m++) {
methods_table[m]->enter(res, port);
if (methods_table[m]->vendor == SUPERIO_VENDOR_ITE) {
devid = sio_readw(res, 0x20);
revid = sio_read(res, 0x22);
} else if (methods_table[m]->vendor == SUPERIO_VENDOR_NUVOTON) {
devid = sio_read(res, 0x20);
revid = sio_read(res, 0x21);
devid = (devid << 8) | revid;
} else {
continue;
}
methods_table[m]->exit(res, port);
for (i = 0; superio_table[i].vendor != 0; i++) {
uint16_t mask;
mask = superio_table[i].mask;
if (superio_table[i].vendor !=
methods_table[m]->vendor)
continue;
if ((superio_table[i].devid & ~mask) != (devid & ~mask))
continue;
break;
}
/* Found a matching SuperIO entry. */
if (superio_table[i].vendor != 0)
break;
}
if (methods_table[m] == NULL)
error = ENXIO;
else
error = 0;
if (!claim || error != 0) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
return (error);
}
sc->methods = methods_table[m];
sc->vendor = sc->methods->vendor;
sc->known_devices = superio_table[i].devices;
sc->io_res = res;
sc->io_rid = rid;
sc->io_port = port;
sc->devid = devid;
sc->revid = revid;
KASSERT(sc->vendor == SUPERIO_VENDOR_ITE ||
sc->vendor == SUPERIO_VENDOR_NUVOTON,
("Only ITE and Nuvoton SuperIO-s are supported"));
sc->ldn_reg = 0x07;
sc->enable_reg = 0x30;
sc->current_ldn = 0xff; /* no device should have this */
if (superio_table[i].descr != NULL) {
device_set_desc(dev, superio_table[i].descr);
} else if (sc->vendor == SUPERIO_VENDOR_ITE) {
char descr[64];
snprintf(descr, sizeof(descr),
"ITE IT%4x SuperIO (revision 0x%02x)",
sc->devid, sc->revid);
device_set_desc_copy(dev, descr);
}
return (0);
}
static void
superio_identify(driver_t *driver, device_t parent)
{
device_t child;
int i;
/*
* Don't create child devices if any already exist.
* Those could be created via isa hints or if this
* driver is loaded, unloaded and then loaded again.
*/
if (device_find_child(parent, "superio", -1)) {
if (bootverbose)
printf("superio: device(s) already created\n");
return;
}
/*
* Create a child for each candidate port.
* It would be nice if we could somehow clean up those
* that this driver fails to probe.
*/
for (i = 0; ports_table[i] != 0; i++) {
child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE,
"superio", -1);
if (child == NULL) {
device_printf(parent, "failed to add superio child\n");
continue;
}
bus_set_resource(child, SYS_RES_IOPORT, 0, ports_table[i], 2);
if (superio_detect(child, false, NULL) != 0)
device_delete_child(parent, child);
}
}
static int
superio_probe(device_t dev)
{
struct siosc *sc;
int error;
/* Make sure we do not claim some ISA PNP device. */
if (isa_get_logicalid(dev) != 0)
return (ENXIO);
/*
* XXX We can populate the softc now only because we return
* BUS_PROBE_SPECIFIC
*/
sc = device_get_softc(dev);
error = superio_detect(dev, true, sc);
if (error != 0)
return (error);
return (BUS_PROBE_SPECIFIC);
}
static void
superio_add_known_child(device_t dev, superio_dev_type_t type, uint8_t ldn)
{
struct siosc *sc = device_get_softc(dev);
struct superio_devinfo *dinfo;
device_t child;
child = BUS_ADD_CHILD(dev, 0, NULL, -1);
if (child == NULL) {
device_printf(dev, "failed to add child for ldn %d, type %s\n",
ldn, devtype_to_str(type));
return;
}
dinfo = device_get_ivars(child);
dinfo->ldn = ldn;
dinfo->type = type;
sio_conf_enter(sc);
dinfo->iobase = sio_ldn_readw(sc, ldn, 0x60);
dinfo->iobase2 = sio_ldn_readw(sc, ldn, 0x62);
dinfo->irq = sio_ldn_readw(sc, ldn, 0x70);
dinfo->dma = sio_ldn_readw(sc, ldn, 0x74);
sio_conf_exit(sc);
STAILQ_INSERT_TAIL(&sc->devlist, dinfo, link);
}
static int
superio_attach(device_t dev)
{
struct siosc *sc = device_get_softc(dev);
int i;
mtx_init(&sc->conf_lock, device_get_nameunit(dev), "superio", MTX_DEF);
STAILQ_INIT(&sc->devlist);
for (i = 0; sc->known_devices[i].type != SUPERIO_DEV_NONE; i++) {
superio_add_known_child(dev, sc->known_devices[i].type,
sc->known_devices[i].ldn);
}
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static int
superio_detach(device_t dev)
{
struct siosc *sc = device_get_softc(dev);
int error;
error = bus_generic_detach(dev);
if (error != 0)
return (error);
device_delete_children(dev);
bus_release_resource(dev, SYS_RES_IOPORT, sc->io_rid, sc->io_res);
mtx_destroy(&sc->conf_lock);
return (0);
}
static device_t
superio_add_child(device_t dev, u_int order, const char *name, int unit)
{
struct superio_devinfo *dinfo;
device_t child;
child = device_add_child_ordered(dev, order, name, unit);
if (child == NULL)
return (NULL);
dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_NOWAIT | M_ZERO);
if (dinfo == NULL) {
device_delete_child(dev, child);
return (NULL);
}
dinfo->ldn = 0xff;
dinfo->type = SUPERIO_DEV_NONE;
dinfo->dev = child;
resource_list_init(&dinfo->resources);
device_set_ivars(child, dinfo);
return (child);
}
static int
superio_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct superio_devinfo *dinfo;
dinfo = device_get_ivars(child);
switch (which) {
case SUPERIO_IVAR_LDN:
*result = dinfo->ldn;
break;
case SUPERIO_IVAR_TYPE:
*result = dinfo->type;
break;
case SUPERIO_IVAR_IOBASE:
*result = dinfo->iobase;
break;
case SUPERIO_IVAR_IOBASE2:
*result = dinfo->iobase2;
break;
case SUPERIO_IVAR_IRQ:
*result = dinfo->irq;
break;
case SUPERIO_IVAR_DMA:
*result = dinfo->dma;
break;
default:
return (ENOENT);
}
return (0);
}
static int
superio_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
switch (which) {
case SUPERIO_IVAR_LDN:
case SUPERIO_IVAR_TYPE:
case SUPERIO_IVAR_IOBASE:
case SUPERIO_IVAR_IOBASE2:
case SUPERIO_IVAR_IRQ:
case SUPERIO_IVAR_DMA:
return (EINVAL);
default:
return (ENOENT);
}
}
static struct resource_list *
superio_get_resource_list(device_t dev, device_t child)
{
struct superio_devinfo *dinfo = device_get_ivars(child);
return (&dinfo->resources);
}
static int
superio_printf(struct superio_devinfo *dinfo, const char *fmt, ...)
{
va_list ap;
int retval;
retval = printf("superio:%s@ldn%0x2x: ",
devtype_to_str(dinfo->type), dinfo->ldn);
va_start(ap, fmt);
retval += vprintf(fmt, ap);
va_end(ap);
return (retval);
}
static void
superio_child_detached(device_t dev, device_t child)
{
struct superio_devinfo *dinfo;
struct resource_list *rl;
dinfo = device_get_ivars(child);
rl = &dinfo->resources;
if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
superio_printf(dinfo, "Device leaked IRQ resources\n");
if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
superio_printf(dinfo, "Device leaked memory resources\n");
if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
superio_printf(dinfo, "Device leaked I/O resources\n");
}
static int
superio_child_location_str(device_t parent, device_t child, char *buf,
size_t buflen)
{
superio_dev_type_t type;
uint8_t ldn;
ldn = superio_get_ldn(child);
type = superio_get_type(child);
snprintf(buf, buflen, "ldn=0x%02x", ldn);
return (0);
}
static int
superio_child_pnp_str(device_t parent, device_t child, char *buf,
size_t buflen)
{
superio_dev_type_t type;
uint8_t ldn;
ldn = superio_get_ldn(child);
type = superio_get_type(child);
snprintf(buf, buflen, "type=%s", devtype_to_str(type));
return (0);
}
static int
superio_print_child(device_t parent, device_t child)
{
superio_dev_type_t type;
uint8_t ldn;
int retval;
ldn = superio_get_ldn(child);
type = superio_get_type(child);
retval = bus_print_child_header(parent, child);
retval += printf(" at %s ldn 0x%02x", devtype_to_str(type), ldn);
retval += bus_print_child_footer(parent, child);
return (retval);
}
superio_vendor_t
superio_vendor(device_t dev)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
return (sc->vendor);
}
uint16_t
superio_devid(device_t dev)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
return (sc->devid);
}
uint8_t
superio_revid(device_t dev)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
return (sc->revid);
}
uint8_t
superio_read(device_t dev, uint8_t reg)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
struct superio_devinfo *dinfo = device_get_ivars(dev);
uint8_t v;
sio_conf_enter(sc);
v = sio_ldn_read(sc, dinfo->ldn, reg);
sio_conf_exit(sc);
return (v);
}
void
superio_write(device_t dev, uint8_t reg, uint8_t val)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
struct superio_devinfo *dinfo = device_get_ivars(dev);
sio_conf_enter(sc);
sio_ldn_write(sc, dinfo->ldn, reg, val);
sio_conf_exit(sc);
}
bool
superio_dev_enabled(device_t dev, uint8_t mask)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
struct superio_devinfo *dinfo = device_get_ivars(dev);
uint8_t v;
/* GPIO device is always active in ITE chips. */
if (sc->vendor == SUPERIO_VENDOR_ITE && dinfo->ldn == 7)
return (true);
v = superio_read(dev, sc->enable_reg);
return ((v & mask) != 0);
}
void
superio_dev_enable(device_t dev, uint8_t mask)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
struct superio_devinfo *dinfo = device_get_ivars(dev);
uint8_t v;
/* GPIO device is always active in ITE chips. */
if (sc->vendor == SUPERIO_VENDOR_ITE && dinfo->ldn == 7)
return;
sio_conf_enter(sc);
v = sio_ldn_read(sc, dinfo->ldn, sc->enable_reg);
v |= mask;
sio_ldn_write(sc, dinfo->ldn, sc->enable_reg, v);
sio_conf_exit(sc);
}
void
superio_dev_disable(device_t dev, uint8_t mask)
{
device_t sio_dev = device_get_parent(dev);
struct siosc *sc = device_get_softc(sio_dev);
struct superio_devinfo *dinfo = device_get_ivars(dev);
uint8_t v;
/* GPIO device is always active in ITE chips. */
if (sc->vendor == SUPERIO_VENDOR_ITE && dinfo->ldn == 7)
return;
sio_conf_enter(sc);
v = sio_ldn_read(sc, dinfo->ldn, sc->enable_reg);
v &= ~mask;
sio_ldn_write(sc, dinfo->ldn, sc->enable_reg, v);
sio_conf_exit(sc);
}
device_t
superio_find_dev(device_t superio, superio_dev_type_t type, int ldn)
{
struct siosc *sc = device_get_softc(superio);
struct superio_devinfo *dinfo;
if (ldn < -1 || ldn > UINT8_MAX)
return (NULL); /* ERANGE */
if (type == SUPERIO_DEV_NONE && ldn == -1)
return (NULL); /* EINVAL */
STAILQ_FOREACH(dinfo, &sc->devlist, link) {
if (ldn != -1 && dinfo->ldn != ldn)
continue;
if (type != SUPERIO_DEV_NONE && dinfo->type != type)
continue;
return (dinfo->dev);
}
return (NULL);
}
static devclass_t superio_devclass;
static device_method_t superio_methods[] = {
DEVMETHOD(device_identify, superio_identify),
DEVMETHOD(device_probe, superio_probe),
DEVMETHOD(device_attach, superio_attach),
DEVMETHOD(device_detach, superio_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(bus_add_child, superio_add_child),
DEVMETHOD(bus_child_detached, superio_child_detached),
DEVMETHOD(bus_child_location_str, superio_child_location_str),
DEVMETHOD(bus_child_pnpinfo_str, superio_child_pnp_str),
DEVMETHOD(bus_print_child, superio_print_child),
DEVMETHOD(bus_read_ivar, superio_read_ivar),
DEVMETHOD(bus_write_ivar, superio_write_ivar),
DEVMETHOD(bus_get_resource_list, superio_get_resource_list),
DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD_END
};
static driver_t superio_driver = {
"superio",
superio_methods,
sizeof(struct siosc)
};
DRIVER_MODULE(superio, isa, superio_driver, superio_devclass, 0, 0);
MODULE_VERSION(superio, 1);