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/* Copyright 2014-2016 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
* imitations under the License.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <time.h>
#include "xscom.h"
#define DBG(fmt...) do { if (verbose) printf(fmt); } while(0)
#define ERR(fmt...) do { fprintf(stderr, fmt); } while(0)
#define OCB_PIB_BASE_P8 0x0006B000
#define OCB_PIB_BASE_P9 0x0006D000
#define OCBCSR0 0x11
#define OCBCSR0_AND 0x12
#define OCBCSR0_OR 0x13
#define OCB_STREAM_MODE PPC_BIT(4)
#define OCB_STREAM_TYPE PPC_BIT(5)
#define OCBAR0 0x10
#define OCBDR0 0x15
#define PVR_TYPE_P8E 0x004b /* Murano */
#define PVR_TYPE_P8 0x004d /* Venice */
#define PVR_TYPE_P8NVL 0x004c /* Naples */
#define PVR_TYPE_P9 0x004e
#define PVR_TYPE_P9P 0x004f /* Axone */
#ifdef __powerpc__
static uint64_t get_xscom_base(void)
{
unsigned int pvr;
asm volatile("mfpvr %0" : "=r" (pvr));
switch (pvr >> 16) {
case PVR_TYPE_P9:
case PVR_TYPE_P9P:
return OCB_PIB_BASE_P9;
case PVR_TYPE_P8E:
case PVR_TYPE_P8:
case PVR_TYPE_P8NVL:
return OCB_PIB_BASE_P8;
}
ERR("Unknown processor, exiting\n");
exit(1);
return 0;
}
#else
/* Just so it compiles on x86 */
static uint64_t get_xscom_base(void) { return 0; }
#endif
int sram_read(uint32_t chip_id, int chan, uint32_t addr, uint64_t *val)
{
uint64_t sdat, base = get_xscom_base();
uint32_t coff = chan * 0x20;
int rc;
/* Read for debug purposes */
rc = xscom_read(chip_id, base + OCBCSR0 + coff, &sdat);
if (rc) {
ERR("xscom OCBCSR0 read error %d\n", rc);
return -1;
}
/* Create an AND mask to clear bit 4 and 5 and poke the AND register */
sdat = ~(OCB_STREAM_MODE | OCB_STREAM_TYPE);
rc = xscom_write(chip_id, base + OCBCSR0_AND + coff, sdat);
if (rc) {
ERR("xscom OCBCSR0_AND write error %d\n", rc);
return -1;
}
sdat = ((uint64_t)addr) << 32;
rc = xscom_write(chip_id, base + OCBAR0 + coff, sdat);
if (rc) {
ERR("xscom OCBAR0 write error %d\n", rc);
return -1;
}
rc = xscom_read(chip_id, base + OCBDR0 + coff, val);
if (rc) {
ERR("xscom OCBDR0 read error %d\n", rc);
return -1;
}
return 0;
}
int sram_write(uint32_t chip_id, int chan, uint32_t addr, uint64_t val)
{
uint64_t sdat, base = get_xscom_base();
uint32_t coff = chan * 0x20;
int rc;
#if 0
if (dummy) {
printf("[dummy] write chip %d OCC sram 0x%08x = %016lx\n",
chip_id, addr, val);
return 0;
}
#endif
/* Read for debug purposes */
rc = xscom_read(chip_id, base + OCBCSR0 + coff, &sdat);
if (rc) {
ERR("xscom OCBCSR0 read error %d\n", rc);
return -1;
}
/* Create an AND mask to clear bit 4 and 5 and poke the AND register */
sdat = ~(OCB_STREAM_MODE | OCB_STREAM_TYPE);
rc = xscom_write(chip_id, base + OCBCSR0_AND + coff, sdat);
if (rc) {
ERR("xscom OCBCSR0_AND write error %d\n", rc);
return -1;
}
sdat = ((uint64_t)addr) << 32;
rc = xscom_write(chip_id, base + OCBAR0 + coff, sdat);
if (rc) {
ERR("xscom OCBAR0 write error %d\n", rc);
return -1;
}
rc = xscom_write(chip_id, base + OCBDR0 + coff, val);
if (rc) {
ERR("xscom OCBDR0 write error %d\n", rc);
return -1;
}
return 0;
}
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