cyclon2.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2006
* Heiko Schocher, hs@denx.de
* Based on ACE1XK.c
*/
#include <common.h> /* core U-Boot definitions */
#include <altera.h>
#include <ACEX1K.h> /* ACEX device family */
/* Define FPGA_DEBUG to get debug printf's */
#ifdef FPGA_DEBUG
#define PRINTF(fmt, args...) printf(fmt, ##args)
#else
#define PRINTF(fmt, args...)
#endif
/* Note: The assumption is that we cannot possibly run fast enough to
* overrun the device (the Slave Parallel mode can free run at 50MHz).
* If there is a need to operate slower, define CONFIG_FPGA_DELAY in
* the board config file to slow things down.
*/
#ifndef CONFIG_FPGA_DELAY
#define CONFIG_FPGA_DELAY()
#endif
#ifndef CONFIG_SYS_FPGA_WAIT
#define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ / 10 /* 100 ms */
#endif
static int CYC2_ps_load(Altera_desc *desc, const void *buf, size_t bsize);
static int CYC2_ps_dump(Altera_desc *desc, const void *buf, size_t bsize);
/* static int CYC2_ps_info( Altera_desc *desc ); */
/* ------------------------------------------------------------------------- */
/* CYCLON2 Generic Implementation */
int CYC2_load(Altera_desc *desc, const void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL;
switch (desc->iface) {
case passive_serial:
PRINTF("%s: Launching Passive Serial Loader\n", __func__);
ret_val = CYC2_ps_load(desc, buf, bsize);
break;
case fast_passive_parallel:
/* Fast Passive Parallel (FPP) and PS only differ in what is
* done in the write() callback. Use the existing PS load
* function for FPP, too.
*/
PRINTF("%s: Launching Fast Passive Parallel Loader\n",
__func__);
ret_val = CYC2_ps_load(desc, buf, bsize);
break;
/* Add new interface types here */
default:
printf("%s: Unsupported interface type, %d\n",
__func__, desc->iface);
}
return ret_val;
}
int CYC2_dump(Altera_desc *desc, const void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL;
switch (desc->iface) {
case passive_serial:
PRINTF("%s: Launching Passive Serial Dump\n", __func__);
ret_val = CYC2_ps_dump(desc, buf, bsize);
break;
/* Add new interface types here */
default:
printf("%s: Unsupported interface type, %d\n",
__func__, desc->iface);
}
return ret_val;
}
int CYC2_info(Altera_desc *desc)
{
return FPGA_SUCCESS;
}
/* ------------------------------------------------------------------------- */
/* CYCLON2 Passive Serial Generic Implementation */
static int CYC2_ps_load(Altera_desc *desc, const void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Altera_CYC2_Passive_Serial_fns *fn = desc->iface_fns;
int ret = 0;
PRINTF("%s: start with interface functions @ 0x%p\n",
__func__, fn);
if (fn) {
int cookie = desc->cookie; /* make a local copy */
unsigned long ts; /* timestamp */
PRINTF("%s: Function Table:\n"
"ptr:\t0x%p\n"
"struct: 0x%p\n"
"config:\t0x%p\n"
"status:\t0x%p\n"
"write:\t0x%p\n"
"done:\t0x%p\n\n",
__func__, &fn, fn, fn->config, fn->status,
fn->write, fn->done);
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
printf("Loading FPGA Device %d...", cookie);
#endif
/*
* Run the pre configuration function if there is one.
*/
if (*fn->pre)
(*fn->pre) (cookie);
/* Establish the initial state */
(*fn->config) (false, true, cookie); /* De-assert nCONFIG */
udelay(100);
(*fn->config) (true, true, cookie); /* Assert nCONFIG */
udelay(2); /* T_cfg > 2us */
/* Wait for nSTATUS to be asserted */
ts = get_timer(0); /* get current time */
do {
CONFIG_FPGA_DELAY();
if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
/* check the time */
puts("** Timeout waiting for STATUS to go high.\n");
(*fn->abort) (cookie);
return FPGA_FAIL;
}
} while (!(*fn->status) (cookie));
/* Get ready for the burn */
CONFIG_FPGA_DELAY();
ret = (*fn->write) (buf, bsize, true, cookie);
if (ret) {
puts("** Write failed.\n");
(*fn->abort) (cookie);
return FPGA_FAIL;
}
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
puts(" OK? ...");
#endif
CONFIG_FPGA_DELAY();
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
putc(' '); /* terminate the dotted line */
#endif
/*
* Checking FPGA's CONF_DONE signal - correctly booted ?
*/
if (!(*fn->done) (cookie)) {
puts("** Booting failed! CONF_DONE is still deasserted.\n");
(*fn->abort) (cookie);
return FPGA_FAIL;
}
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
puts(" OK\n");
#endif
ret_val = FPGA_SUCCESS;
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (ret_val == FPGA_SUCCESS)
puts("Done.\n");
else
puts("Fail.\n");
#endif
/*
* Run the post configuration function if there is one.
*/
if (*fn->post)
(*fn->post) (cookie);
} else {
printf("%s: NULL Interface function table!\n", __func__);
}
return ret_val;
}
static int CYC2_ps_dump(Altera_desc *desc, const void *buf, size_t bsize)
{
/* Readback is only available through the Slave Parallel and */
/* boundary-scan interfaces. */
printf("%s: Passive Serial Dumping is unavailable\n", __func__);
return FPGA_FAIL;
}