u-boot/post/board/lwmon5/fpga.c

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/*
* (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
*
* Developed for DENX Software Engineering GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
/* This test performs testing of FPGA SCRATCH register,
* gets FPGA version and run get_ram_size() on FPGA memory
*/
#include <post.h>
#include <watchdog.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#define FPGA_SCRATCH_REG 0xC4000050
#define FPGA_VERSION_REG 0xC4000040
#define FPGA_RAM_START 0xC4200000
#define FPGA_RAM_END 0xC4203FFF
#define FPGA_STAT 0xC400000C
#define FPGA_BUFFER 0x00800000
#define FPGA_RAM_SIZE (FPGA_RAM_END - FPGA_RAM_START + 1)
#if CONFIG_POST & CONFIG_SYS_POST_BSPEC3
const static unsigned long pattern[] = {
0xffffffff,
0xaaaaaaaa,
0xcccccccc,
0xf0f0f0f0,
0xff00ff00,
0xffff0000,
0x0000ffff,
0x00ff00ff,
0x0f0f0f0f,
0x33333333,
0x55555555,
0x00000000,
};
const static unsigned long otherpattern = 0x01234567;
static int one_scratch_test(uint value)
{
uint read_value;
int ret = 0;
out_be32((void *)FPGA_SCRATCH_REG, value);
/* read other location (protect against data lines capacity) */
ret = in_be16((void *)FPGA_VERSION_REG);
/* verify test pattern */
read_value = in_be32((void *)FPGA_SCRATCH_REG);
if (read_value != value) {
post_log("FPGA SCRATCH test failed write %08X, read %08X\n",
value, read_value);
ret = -1;
}
return ret;
}
static int fpga_post_test1(ulong *start, ulong size, ulong val)
{
int ret = 0;
ulong i = 0;
ulong *mem = start;
ulong readback;
for (i = 0; i < size / sizeof(ulong); i++) {
mem[i] = val;
if (i % 1024 == 0)
WATCHDOG_RESET();
}
for (i = 0; i < size / sizeof(ulong); i++) {
readback = mem[i];
if (readback != val) {
post_log("FPGA Memory error at %08x, "
"wrote %08x, read %08x !\n",
mem + i, val, readback);
ret = -1;
break;
}
if (i % 1024 == 0)
WATCHDOG_RESET();
}
return ret;
}
static int fpga_post_test2(ulong *start, ulong size)
{
int ret = 0;
ulong i = 0;
ulong *mem = start;
ulong readback;
for (i = 0; i < size / sizeof(ulong); i++) {
mem[i] = 1 << (i % 32);
if (i % 1024 == 0)
WATCHDOG_RESET();
}
for (i = 0; i < size / sizeof(ulong); i++) {
readback = mem[i];
if (readback != 1 << (i % 32)) {
post_log("FPGA Memory error at %08x, "
"wrote %08x, read %08x !\n",
mem + i, 1 << (i % 32), readback);
ret = -1;
break;
}
if (i % 1024 == 0)
WATCHDOG_RESET();
}
return ret;
}
static int fpga_post_test3(ulong *start, ulong size)
{
int ret = 0;
ulong i = 0;
ulong *mem = start;
ulong readback;
for (i = 0; i < size / sizeof(ulong); i++) {
mem[i] = i;
if (i % 1024 == 0)
WATCHDOG_RESET();
}
for (i = 0; i < size / sizeof(ulong); i++) {
readback = mem[i];
if (readback != i) {
post_log("FPGA Memory error at %08x, "
"wrote %08x, read %08x !\n",
mem + i, i, readback);
ret = -1;
break;
}
if (i % 1024 == 0)
WATCHDOG_RESET();
}
return ret;
}
static int fpga_post_test4(ulong *start, ulong size)
{
int ret = 0;
ulong i = 0;
ulong *mem = start;
ulong readback;
for (i = 0; i < size / sizeof(ulong); i++) {
mem[i] = ~i;
if (i % 1024 == 0)
WATCHDOG_RESET();
}
for (i = 0; i < size / sizeof(ulong); i++) {
readback = mem[i];
if (readback != ~i) {
post_log("FPGA Memory error at %08x, "
"wrote %08x, read %08x !\n",
mem + i, ~i, readback);
ret = -1;
break;
}
if (i % 1024 == 0)
WATCHDOG_RESET();
}
return ret;
}
/* FPGA Memory-pattern-test */
static int fpga_mem_test(void)
{
int ret = 0;
ulong* start = (ulong *)FPGA_RAM_START;
ulong size = FPGA_RAM_SIZE;
if (ret == 0)
ret = fpga_post_test1(start, size, 0x00000000);
if (ret == 0)
ret = fpga_post_test1(start, size, 0xffffffff);
if (ret == 0)
ret = fpga_post_test1(start, size, 0x55555555);
if (ret == 0)
ret = fpga_post_test1(start, size, 0xaaaaaaaa);
WATCHDOG_RESET();
if (ret == 0)
ret = fpga_post_test2(start, size);
if (ret == 0)
ret = fpga_post_test3(start, size);
if (ret == 0)
ret = fpga_post_test4(start, size);
return ret;
}
/* Verify FPGA addresslines */
static int fpga_post_addrline(ulong *address, ulong *base, ulong size)
{
unsigned long *target;
unsigned long *end;
unsigned long readback;
unsigned long xor;
int ret = 0;
end = (ulong *)((ulong)base + size);
xor = 0;
for (xor = sizeof(ulong); xor > 0; xor <<= 1) {
target = (ulong*)((ulong)address ^ xor);
if ((target >= base) && (target < end)) {
*address = ~*target;
readback = *target;
if (readback == *address) {
post_log("Memory (address line) error at %08x"
"XOR value %08x !\n",
address, target, xor);
ret = -1;
break;
}
}
}
return ret;
}
/* Verify FPGA addresslines */
static int fpga_post_dataline(ulong *address)
{
unsigned long temp32 = 0;
int i = 0;
int ret = 0;
for (i = 0; i < ARRAY_SIZE(pattern); i++) {
*address = pattern[i];
/*
* Put a different pattern on the data lines: otherwise they
* may float long enough to read back what we wrote.
*/
*(address + 1) = otherpattern;
temp32 = *address;
if (temp32 != pattern[i]){
post_log("Memory (date line) error at %08x, "
"wrote %08x, read %08x !\n",
address, pattern[i], temp32);
ret = 1;
}
}
return ret;
}
/* Verify FPGA, get version & memory size */
int fpga_post_test(int flags)
{
uint old_value;
uint version;
uint read_value;
int ret = 0;
post_log("\n");
old_value = in_be32((void *)FPGA_SCRATCH_REG);
if (one_scratch_test(0x55555555))
ret = 1;
if (one_scratch_test(0xAAAAAAAA))
ret = 1;
out_be32((void *)FPGA_SCRATCH_REG, old_value);
version = in_be32((void *)FPGA_VERSION_REG);
post_log("FPGA version %u.%u\n",
(version >> 8) & 0xFF, version & 0xFF);
/* Enable write to FPGA RAM */
out_be32((void *)FPGA_STAT, in_be32((void *)FPGA_STAT) | 0x1000);
/* get RAM size */
read_value = get_ram_size((void *)CONFIG_SYS_FPGA_BASE_1, FPGA_RAM_SIZE);
post_log("FPGA RAM size %d bytes\n", read_value);
WATCHDOG_RESET();
/* copy fpga memory to DDR2 RAM*/
memcpy((void *)FPGA_BUFFER,(void *)FPGA_RAM_START, FPGA_RAM_SIZE);
WATCHDOG_RESET();
/* Test datalines */
if (fpga_post_dataline((ulong *)FPGA_RAM_START)) {
ret = 1;
goto out;
}
WATCHDOG_RESET();
/* Test addresslines */
if (fpga_post_addrline((ulong *)FPGA_RAM_START,
(ulong *)FPGA_RAM_START, FPGA_RAM_SIZE)) {
ret = 1;
goto out;
}
WATCHDOG_RESET();
if (fpga_post_addrline((ulong *)FPGA_RAM_END - sizeof(long),
(ulong *)FPGA_RAM_START, FPGA_RAM_SIZE)) {
ret = 1;
goto out;
}
WATCHDOG_RESET();
/* Memory Pattern Test */
if (fpga_mem_test()) {
ret = 1;
goto out;
}
WATCHDOG_RESET();
/* restore memory */
memcpy((void *)FPGA_RAM_START,(void *)FPGA_BUFFER, FPGA_RAM_SIZE);
WATCHDOG_RESET();
out:
/* Disable write to RAM */
out_be32((void *)FPGA_STAT, in_be32((void *)FPGA_STAT) & 0xEFFF);
return ret;
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC3 */