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/* Copyright 2017 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "main.h"
#define AMI_BMC "/proc/ractrends/Helper/FwInfo"
#define OPENFSI_BMC "/sys/bus/platform/devices/gpio-fsi/fsi0/"
#define FSI_CFAM_ID "/sys/devices/platform/gpio-fsi/fsi0/slave@00:00/cfam_id"
#define CHIP_ID_P8 0xea
#define CHIP_ID_P9 0xd1
#define CHIP_ID_P8P 0xd3
enum backend default_backend(void)
{
int rc;
rc = access(AMI_BMC, F_OK);
if (rc == 0) /* AMI BMC */
return I2C;
rc = access(OPENFSI_BMC, F_OK);
if (rc == 0) /* Kernel interface. OpenBMC */
return KERNEL;
return FAKE;
}
void print_backends(FILE *stream)
{
fprintf(stream, "Valid backends: i2c kernel fsi fake\n");
}
void print_targets(FILE *stream)
{
fprintf(stream, "kernel: No target is necessary\n");
fprintf(stream, "i2c: No target is necessary\n");
fprintf(stream, "fsi: p8 p9w p9b p9r p9t p9z\n");
}
static const char *default_kernel_target(void)
{
FILE *cfam_id_file;
/* Try and determine the correct device type */
cfam_id_file = fopen(FSI_CFAM_ID, "r");
if (cfam_id_file) {
uint32_t cfam_id = 0;
int rc;
rc = fscanf(cfam_id_file, "0x%" PRIx32, &cfam_id);
if (rc != 1)
pdbg_log(PDBG_ERROR, "%s", strerror(errno));
fclose(cfam_id_file);
switch((cfam_id >> 4) & 0xff) {
case CHIP_ID_P9:
return "p9";
break;
case CHIP_ID_P8:
case CHIP_ID_P8P:
return "p8";
break;
default:
pdbg_log(PDBG_ERROR, "Unknown chip-id detected\n");
pdbg_log(PDBG_ERROR, "You will need to specify a host type with -d <host type>\n");
return NULL;
}
} else {
/* The support for POWER8 included the cfam_id
* so if it doesn't exist assume we must be on
* P9 */
pdbg_log(PDBG_WARNING, "Unable to determine host type, defaulting to p9\n");
return "p9";
}
return NULL;
}
static const char *default_fsi_target(void)
{
FILE *dt_compatible;
char line[256];
char *p;
dt_compatible = fopen("/proc/device-tree/compatible", "r");
if (!dt_compatible)
return NULL;
p = fgets(line, sizeof(line), dt_compatible);
fclose(dt_compatible);
if (!p) /* Uh oh*/
return NULL;
if (strstr(line, "witherspoon"))
return "p9w";
if (strstr(line, "blackbird"))
return "p9b";
if (strstr(line, "romulus"))
return "p9r";
if (strstr(line, "talos"))
return "p9t";
if (strstr(line, "zaius"))
return "p9z";
if (strstr(line, "palmetto"))
return "p8";
return NULL;
}
const char *default_target(enum backend backend)
{
switch(backend) {
case I2C:
return NULL;
break;
case KERNEL:
return default_kernel_target();
break;
case FSI:
return default_fsi_target();
break;
default:
return NULL;
break;
}
return NULL;
}
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