File: [local] / sys / dev / i2c / i2c.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:09:57 2008 UTC (16 years, 5 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
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/* $OpenBSD: i2c.c,v 1.14 2006/02/26 20:24:46 deraadt Exp $ */
/* $NetBSD: i2c.c,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/event.h>
#include <sys/conf.h>
#define _I2C_PRIVATE
#include <dev/i2c/i2cvar.h>
#define IICCF_ADDR 0
#define IICCF_SIZE 1
#include "ipmi.h"
struct iic_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
};
int iic_match(struct device *, void *, void *);
void iic_attach(struct device *, struct device *, void *);
int iic_search(struct device *, void *, void *);
struct cfattach iic_ca = {
sizeof (struct iic_softc),
iic_match,
iic_attach
};
struct cfdriver iic_cd = {
NULL, "iic", DV_DULL
};
int
iicbus_print(void *aux, const char *pnp)
{
struct i2cbus_attach_args *iba = aux;
if (pnp != NULL)
printf("%s at %s", iba->iba_name, pnp);
return (UNCONF);
}
int
iic_print(void *aux, const char *pnp)
{
struct i2c_attach_args *ia = aux;
if (pnp != NULL)
printf("\"%s\" at %s", ia->ia_name, pnp);
printf(" addr 0x%x", ia->ia_addr);
return (UNCONF);
}
int
iic_search(struct device *parent, void *arg, void *aux)
{
struct iic_softc *sc = (void *) parent;
struct cfdata *cf = arg;
struct i2c_attach_args ia;
if (cf->cf_loc[IICCF_ADDR] != -1) {
memset(&ia, 0, sizeof(ia));
ia.ia_tag = sc->sc_tag;
ia.ia_addr = cf->cf_loc[IICCF_ADDR];
ia.ia_size = cf->cf_loc[IICCF_SIZE];
ia.ia_name = "unknown";
if (cf->cf_attach->ca_match(parent, cf, &ia) > 0)
config_attach(parent, cf, &ia, iic_print);
}
return (0);
}
int
iic_match(struct device *parent, void *arg, void *aux)
{
struct cfdata *cf = arg;
struct i2cbus_attach_args *iba = aux;
/* Just make sure we're looking for i2c. */
return (strcmp(iba->iba_name, cf->cf_driver->cd_name) == 0);
}
void
iic_attach(struct device *parent, struct device *self, void *aux)
{
struct iic_softc *sc = (void *) self;
struct i2cbus_attach_args *iba = aux;
sc->sc_tag = iba->iba_tag;
#if NIPMI > 0
extern int ipmi_enabled;
if (ipmi_enabled) {
printf(": disabled to avoid ipmi0 interactions\n");
return;
}
#endif
printf("\n");
/*
* Attach all i2c devices described in the kernel
* configuration file.
*/
config_search(iic_search, self, NULL);
/*
* Scan for known device signatures.
*/
if (iba->iba_bus_scan)
(iba->iba_bus_scan)(self, aux, iba->iba_bus_scan_arg);
else
iic_scan(self, aux);
}