718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
365 lines
8.4 KiB
C
365 lines
8.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 1998, 2001 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* I2C support for the bti2c chipset.
|
|
*
|
|
* From brooktree848.c <fsmp@freefall.org>
|
|
*/
|
|
|
|
#include "opt_bktr.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/uio.h>
|
|
|
|
#if __FreeBSD_version < 500014
|
|
#include <sys/select.h>
|
|
#else
|
|
#include <sys/selinfo.h>
|
|
#endif
|
|
|
|
#if (__FreeBSD_version < 500000)
|
|
#include <pci/pcivar.h>
|
|
#include <pci/pcireg.h>
|
|
#else
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcireg.h>
|
|
#endif
|
|
|
|
#include <machine/bus.h>
|
|
#include <sys/bus.h>
|
|
|
|
#include <dev/bktr/ioctl_meteor.h>
|
|
#include <dev/bktr/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
|
|
#include <dev/bktr/bktr_reg.h>
|
|
#include <dev/bktr/bktr_i2c.h>
|
|
|
|
#include <dev/smbus/smbconf.h>
|
|
#include <dev/iicbus/iiconf.h>
|
|
|
|
/* Compilation is void if BKTR_USE_FREEBSD_SMBUS is not
|
|
* defined. This allows bktr owners to have smbus active for there
|
|
* motherboard and still use their bktr without smbus.
|
|
*/
|
|
#if defined(BKTR_USE_FREEBSD_SMBUS)
|
|
|
|
#define BTI2C_DEBUG(x) if (bti2c_debug) (x)
|
|
static int bti2c_debug = 0;
|
|
|
|
/*
|
|
* Call this to pass the address of the bktr device to the
|
|
* bti2c_i2c layer and initialize all the I2C bus architecture
|
|
*/
|
|
int bt848_i2c_attach(device_t dev)
|
|
{
|
|
struct bktr_softc *bktr_sc = (struct bktr_softc *)device_get_softc(dev);
|
|
struct bktr_i2c_softc *sc = &bktr_sc->i2c_sc;
|
|
|
|
sc->smbus = device_add_child(dev, "smbus", -1);
|
|
sc->iicbb = device_add_child(dev, "iicbb", -1);
|
|
|
|
if (!sc->iicbb || !sc->smbus)
|
|
return ENXIO;
|
|
|
|
bus_generic_attach(dev);
|
|
|
|
return (0);
|
|
};
|
|
|
|
int bt848_i2c_detach(device_t dev)
|
|
{
|
|
struct bktr_softc *bktr_sc = (struct bktr_softc *)device_get_softc(dev);
|
|
struct bktr_i2c_softc *sc = &bktr_sc->i2c_sc;
|
|
int error = 0;
|
|
|
|
if ((error = bus_generic_detach(dev)))
|
|
goto error;
|
|
|
|
if (sc->iicbb && (error = device_delete_child(dev, sc->iicbb)))
|
|
goto error;
|
|
|
|
if (sc->smbus && (error = device_delete_child(dev, sc->smbus)))
|
|
goto error;
|
|
|
|
error:
|
|
return (error);
|
|
}
|
|
|
|
int bti2c_smb_callback(device_t dev, int index, void *data)
|
|
{
|
|
struct bktr_softc *bktr_sc = (struct bktr_softc *)device_get_softc(dev);
|
|
struct bktr_i2c_softc *sc = &bktr_sc->i2c_sc;
|
|
int error = 0;
|
|
|
|
/* test each time if we already have/haven't the iicbus
|
|
* to avoid deadlocks
|
|
*/
|
|
switch (index) {
|
|
case SMB_REQUEST_BUS:
|
|
/* XXX test & set */
|
|
mtx_lock(&Giant);
|
|
if (!sc->bus_owned) {
|
|
sc->bus_owned = 1;
|
|
} else
|
|
error = EWOULDBLOCK;
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
|
|
case SMB_RELEASE_BUS:
|
|
/* XXX test & set */
|
|
mtx_lock(&Giant);
|
|
if (sc->bus_owned) {
|
|
sc->bus_owned = 0;
|
|
} else
|
|
error = EINVAL;
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int bti2c_iic_callback(device_t dev, int index, caddr_t *data)
|
|
{
|
|
struct bktr_softc *bktr_sc = (struct bktr_softc *)device_get_softc(dev);
|
|
struct bktr_i2c_softc *sc = &bktr_sc->i2c_sc;
|
|
int error = 0;
|
|
|
|
/* test each time if we already have/haven't the smbus
|
|
* to avoid deadlocks
|
|
*/
|
|
switch (index) {
|
|
case IIC_REQUEST_BUS:
|
|
/* XXX test & set */
|
|
mtx_lock(&Giant);
|
|
if (!sc->bus_owned) {
|
|
sc->bus_owned = 1;
|
|
} else
|
|
error = EWOULDBLOCK;
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
|
|
case IIC_RELEASE_BUS:
|
|
/* XXX test & set */
|
|
mtx_lock(&Giant);
|
|
if (sc->bus_owned) {
|
|
sc->bus_owned = 0;
|
|
} else
|
|
error = EINVAL;
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int bti2c_iic_reset(device_t dev, u_char speed, u_char addr, u_char * oldaddr)
|
|
{
|
|
mtx_lock(&Giant);
|
|
if (oldaddr)
|
|
*oldaddr = 0; /* XXX */
|
|
mtx_unlock(&Giant);
|
|
|
|
return (IIC_ENOADDR);
|
|
}
|
|
|
|
void bti2c_iic_setsda(device_t dev, int val)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
int clock;
|
|
|
|
mtx_lock(&Giant);
|
|
clock = INL(sc, BKTR_I2C_DATA_CTL) & 0x2;
|
|
|
|
if (val)
|
|
OUTL(sc, BKTR_I2C_DATA_CTL, clock | 1);
|
|
else
|
|
OUTL(sc, BKTR_I2C_DATA_CTL, clock);
|
|
mtx_unlock(&Giant);
|
|
|
|
return;
|
|
}
|
|
|
|
void bti2c_iic_setscl(device_t dev, int val)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
int data;
|
|
|
|
mtx_lock(&Giant);
|
|
data = INL(sc, BKTR_I2C_DATA_CTL) & 0x1;
|
|
|
|
if (val)
|
|
OUTL(sc, BKTR_I2C_DATA_CTL, 0x2 | data);
|
|
else
|
|
OUTL(sc, BKTR_I2C_DATA_CTL, data);
|
|
mtx_unlock(&Giant);
|
|
|
|
return;
|
|
}
|
|
|
|
int
|
|
bti2c_iic_getsda(device_t dev)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
int retval;
|
|
|
|
mtx_lock(&Giant);
|
|
retval = INL(sc,BKTR_I2C_DATA_CTL) & 0x1;
|
|
mtx_unlock(&Giant);
|
|
return (retval);
|
|
}
|
|
|
|
int
|
|
bti2c_iic_getscl(device_t dev)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bti2c_write(struct bktr_softc *sc, u_long data)
|
|
{
|
|
u_long x;
|
|
|
|
mtx_lock(&Giant);
|
|
|
|
/* clear status bits */
|
|
OUTL(sc, BKTR_INT_STAT, (BT848_INT_RACK | BT848_INT_I2CDONE));
|
|
|
|
BTI2C_DEBUG(printf("w%lx", data));
|
|
|
|
/* write the address and data */
|
|
OUTL(sc, BKTR_I2C_DATA_CTL, data);
|
|
|
|
/* wait for completion */
|
|
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
|
if ( INL(sc, BKTR_INT_STAT) & BT848_INT_I2CDONE )
|
|
break;
|
|
}
|
|
|
|
/* check for ACK */
|
|
if ( !x || !( INL(sc, BKTR_INT_STAT) & BT848_INT_RACK) ) {
|
|
BTI2C_DEBUG(printf("%c%c", (!x)?'+':'-',
|
|
(!( INL(sc, BKTR_INT_STAT) & BT848_INT_RACK))?'+':'-'));
|
|
mtx_unlock(&Giant);
|
|
return (SMB_ENOACK);
|
|
}
|
|
BTI2C_DEBUG(printf("+"));
|
|
mtx_unlock(&Giant);
|
|
|
|
/* return OK */
|
|
return( 0 );
|
|
}
|
|
|
|
int
|
|
bti2c_smb_writeb(device_t dev, u_char slave, char cmd, char byte)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
u_long data;
|
|
|
|
data = ((slave & 0xff) << 24) | ((byte & 0xff) << 16) | (u_char)cmd;
|
|
|
|
return (bti2c_write(sc, data));
|
|
}
|
|
|
|
/*
|
|
* byte1 becomes low byte of word
|
|
* byte2 becomes high byte of word
|
|
*/
|
|
int
|
|
bti2c_smb_writew(device_t dev, u_char slave, char cmd, short word)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
u_long data;
|
|
char low, high;
|
|
|
|
low = (char)(word & 0xff);
|
|
high = (char)((word & 0xff00) >> 8);
|
|
|
|
data = ((slave & 0xff) << 24) | ((low & 0xff) << 16) |
|
|
((high & 0xff) << 8) | BT848_DATA_CTL_I2CW3B | (u_char)cmd;
|
|
|
|
return (bti2c_write(sc, data));
|
|
}
|
|
|
|
/*
|
|
* The Bt878 and Bt879 differed on the treatment of i2c commands
|
|
*/
|
|
int
|
|
bti2c_smb_readb(device_t dev, u_char slave, char cmd, char *byte)
|
|
{
|
|
struct bktr_softc *sc = (struct bktr_softc *)device_get_softc(dev);
|
|
u_long x;
|
|
|
|
mtx_lock(&Giant);
|
|
/* clear status bits */
|
|
OUTL(sc,BKTR_INT_STAT, (BT848_INT_RACK | BT848_INT_I2CDONE));
|
|
|
|
OUTL(sc,BKTR_I2C_DATA_CTL, ((slave & 0xff) << 24) | (u_char)cmd);
|
|
|
|
BTI2C_DEBUG(printf("r%lx/", (u_long)(((slave & 0xff) << 24) | (u_char)cmd)));
|
|
|
|
/* wait for completion */
|
|
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
|
if ( INL(sc,BKTR_INT_STAT) & BT848_INT_I2CDONE )
|
|
break;
|
|
}
|
|
|
|
/* check for ACK */
|
|
if ( !x || !(INL(sc,BKTR_INT_STAT) & BT848_INT_RACK) ) {
|
|
BTI2C_DEBUG(printf("r%c%c", (!x)?'+':'-',
|
|
(!( INL(sc,BKTR_INT_STAT) & BT848_INT_RACK))?'+':'-'));
|
|
mtx_unlock(&Giant);
|
|
return (SMB_ENOACK);
|
|
}
|
|
|
|
*byte = (char)((INL(sc,BKTR_I2C_DATA_CTL) >> 8) & 0xff);
|
|
BTI2C_DEBUG(printf("r%x+", *byte));
|
|
mtx_unlock(&Giant);
|
|
|
|
return (0);
|
|
}
|
|
|
|
DRIVER_MODULE(iicbb, bktr, iicbb_driver, iicbb_devclass, 0, 0);
|
|
DRIVER_MODULE(smbus, bktr, smbus_driver, smbus_devclass, 0, 0);
|
|
|
|
#endif /* defined(BKTR_USE_FREEBSD_SMBUS) */
|