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author | nsouch <nsouch@FreeBSD.org> | 1998-09-03 20:52:54 +0000 |
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committer | nsouch <nsouch@FreeBSD.org> | 1998-09-03 20:52:54 +0000 |
commit | ec25a2ed532b9e9fe85267477d05fffd7f42ef7e (patch) | |
tree | fef034097a685262a4c155c7d9952c55949fa22f /sys/dev/smbus/smbus.c | |
parent | 165178e4262e62b57512165963e7c081da08cf8b (diff) | |
download | FreeBSD-src-ec25a2ed532b9e9fe85267477d05fffd7f42ef7e.zip FreeBSD-src-ec25a2ed532b9e9fe85267477d05fffd7f42ef7e.tar.gz |
Submitted by: nsouch
System Management Bus generic support over new bus architecture.
Diffstat (limited to 'sys/dev/smbus/smbus.c')
-rw-r--r-- | sys/dev/smbus/smbus.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/sys/dev/smbus/smbus.c b/sys/dev/smbus/smbus.c new file mode 100644 index 0000000..f9f787d --- /dev/null +++ b/sys/dev/smbus/smbus.c @@ -0,0 +1,157 @@ +/*- + * Copyright (c) 1998 Nicolas Souchu + * 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. + * + * $Id: smbus.c,v 1.1.1.2 1998/08/13 15:16:58 son Exp $ + * + */ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> + +#include <dev/smbus/smbconf.h> +#include <dev/smbus/smbus.h> + +/* + * Autoconfiguration and support routines for the Philips serial I2C bus + */ + +#define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev)) + +/* + * structure used to attach devices to the I2C bus + */ +struct smbus_device { + const char *smbd_name; /* device name */ + const u_char smbd_addr; /* address of the device */ + const char *smbd_desc; /* device descriptor */ +}; + +/* + * list of known devices + */ +struct smbus_device smbus_children[] = { + { "smb", 0, "General Call" }, + { NULL, 0 } +}; + +static devclass_t smbus_devclass; + +/* + * Device methods + */ +static int smbus_probe(device_t); +static int smbus_attach(device_t); +static void smbus_print_child(device_t, device_t); +static int smbus_read_ivar(device_t , device_t, int, u_long *); + +static device_method_t smbus_methods[] = { + /* device interface */ + DEVMETHOD(device_probe, smbus_probe), + DEVMETHOD(device_attach, smbus_attach), + DEVMETHOD(device_detach, bus_generic_detach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + + /* bus interface */ + DEVMETHOD(bus_print_child, smbus_print_child), + DEVMETHOD(bus_read_ivar, smbus_read_ivar), + DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), + DEVMETHOD(bus_create_intr, bus_generic_create_intr), + DEVMETHOD(bus_connect_intr, bus_generic_connect_intr), + + { 0, 0 } +}; + +static driver_t smbus_driver = { + "smbus", + smbus_methods, + DRIVER_TYPE_MISC, + sizeof(struct smbus_softc), +}; + +/* + * At 'probe' time, we add all the devices which we know about to the + * bus. The generic attach routine will probe and attach them if they + * are alive. + */ +static int +smbus_probe(device_t dev) +{ + struct smbus_device *smbdev; + device_t child; + + for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) { + + child = device_add_child(dev, smbdev->smbd_name, -1, smbdev); + device_set_desc(child, smbdev->smbd_desc); + } + + return (0); +} + +static int +smbus_attach(device_t dev) +{ + struct smbus_softc *sc = device_get_softc(dev); + device_t parent = device_get_parent(dev); + + printf("Probing for devices on the SMB bus:\n"); + bus_generic_attach(dev); + + return (0); +} + +void +smbus_generic_intr(device_t dev, u_char devaddr, char low, char high) +{ + return; +} + +static void +smbus_print_child(device_t bus, device_t dev) +{ + struct smbus_device* smbdev = DEVTOSMBUS(dev); + + printf(" on %s%d addr 0x%x", device_get_name(bus), + device_get_unit(bus), smbdev->smbd_addr); + + return; +} + +static int +smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result) +{ + struct smbus_device* smbdev = DEVTOSMBUS(dev); + + switch (index) { + case SMBUS_IVAR_ADDR: + *result = smbdev->smbd_addr; + break; + } + return (ENOENT); +} + +DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0); |