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/* $OpenBSD: ofwi2c.c,v 1.9 2014/02/21 21:28:26 deraadt Exp $ */
/*
* Copyright (c) 2006 Theo de Raadt
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <dev/i2c/i2cvar.h>
#include <dev/ofw/openfirm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <sparc64/pci_machdep.h>
#include <arch/sparc64/dev/ofwi2cvar.h>
void
ofwiic_pci_scan(struct device *self, struct i2cbus_attach_args *iba, void *aux)
{
struct pci_attach_args *pa = aux;
pcitag_t tag = pa->pa_tag;
int iba_node = PCITAG_NODE(tag);
char name[32];
int node;
for (node = OF_child(iba_node); node; node = OF_peer(node)) {
memset(name, 0, sizeof(name));
if (OF_getprop(node, "compatible", name, sizeof(name)) == -1)
continue;
if (name[0] == '\0')
continue;
if (strcmp(name, "i2c-smbus") == 0 ||
strcmp(name, "i2c") == 0)
ofwiic_scan(self, iba, &node);
}
}
void
ofwiic_scan(struct device *self, struct i2cbus_attach_args *iba, void *aux)
{
int iba_node = *(int *)aux;
extern int iic_print(void *, const char *);
struct i2c_attach_args ia;
char name[32];
u_int32_t reg[2];
int node;
for (node = OF_child(iba_node); node; node = OF_peer(node)) {
memset(name, 0, sizeof(name));
memset(reg, 0, sizeof(reg));
if (OF_getprop(node, "compatible", name, sizeof(name)) == -1)
continue;
if (name[0] == '\0')
continue;
if (OF_getprop(node, "reg", reg, sizeof(reg)) == -1)
continue;
memset(&ia, 0, sizeof(ia));
ia.ia_tag = iba->iba_tag;
ia.ia_addr = (reg[0] << 7) | (reg[1] >> 1);
ia.ia_name = name;
ia.ia_cookie = &node;
if (strncmp(ia.ia_name, "i2c-", strlen("i2c-")) == 0)
ia.ia_name += strlen("i2c-");
/* Skip non-SPD EEPROMs. */
if (strcmp(ia.ia_name, "at24c64") == 0 ||
strcmp(ia.ia_name, "at34c02") == 0) {
if (OF_getprop(node, "name", name, sizeof(name)) == -1)
continue;
if (strcmp(name, "dimm") == 0 ||
strcmp(name, "dimm-spd") == 0)
ia.ia_name = "spd";
else
continue;
}
/*
* XXX alipm crashes on some machines for an unknown reason
* when doing the periodic i2c accesses things like sensors
* need. However, devices accessed only at boot are fine.
*/
if (strcmp(self->dv_parent->dv_xname, "alipm0") == 0 &&
(ia.ia_addr < 0x50 || ia.ia_addr > 0x57)) {
iic_print(&ia, self->dv_parent->dv_xname);
printf(" skipped due to %s bugs\n",
self->dv_parent->dv_xname);
continue;
}
config_found(self, &ia, iic_print);
}
}
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