u-boot/drivers/fpga/ACEX1K.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

249 lines
6.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Steven Scholz, imc Measurement & Control, steven.scholz@imc-berlin.de
*
* (C) Copyright 2002
* Rich Ireland, Enterasys Networks, rireland@enterasys.com.
*/
#include <common.h> /* core U-Boot definitions */
#include <console.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 ACEX1K_ps_load(Altera_desc *desc, const void *buf, size_t bsize);
static int ACEX1K_ps_dump(Altera_desc *desc, const void *buf, size_t bsize);
/* static int ACEX1K_ps_info(Altera_desc *desc); */
/* ------------------------------------------------------------------------- */
/* ACEX1K Generic Implementation */
int ACEX1K_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", __FUNCTION__);
ret_val = ACEX1K_ps_load (desc, buf, bsize);
break;
/* Add new interface types here */
default:
printf ("%s: Unsupported interface type, %d\n",
__FUNCTION__, desc->iface);
}
return ret_val;
}
int ACEX1K_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", __FUNCTION__);
ret_val = ACEX1K_ps_dump (desc, buf, bsize);
break;
/* Add new interface types here */
default:
printf ("%s: Unsupported interface type, %d\n",
__FUNCTION__, desc->iface);
}
return ret_val;
}
int ACEX1K_info( Altera_desc *desc )
{
return FPGA_SUCCESS;
}
/* ------------------------------------------------------------------------- */
/* ACEX1K Passive Serial Generic Implementation */
static int ACEX1K_ps_load(Altera_desc *desc, const void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Altera_ACEX1K_Passive_Serial_fns *fn = desc->iface_fns;
int i;
PRINTF ("%s: start with interface functions @ 0x%p\n",
__FUNCTION__, fn);
if (fn) {
size_t bytecount = 0;
unsigned char *data = (unsigned char *) buf;
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"
"clk:\t0x%p\n"
"data:\t0x%p\n"
"done:\t0x%p\n\n",
__FUNCTION__, &fn, fn, fn->config, fn->status,
fn->clk, fn->data, 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) (true, true, cookie); /* Assert nCONFIG */
udelay(2); /* T_cfg > 2us */
/* nSTATUS should be asserted now */
(*fn->done) (cookie);
if ( !(*fn->status) (cookie) ) {
puts ("** nSTATUS is not asserted.\n");
(*fn->abort) (cookie);
return FPGA_FAIL;
}
(*fn->config) (false, true, cookie); /* Deassert nCONFIG */
udelay(2); /* T_cf2st1 < 4us */
/* Wait for nSTATUS to be released (i.e. deasserted) */
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;
}
(*fn->done) (cookie);
} while ((*fn->status) (cookie));
/* Get ready for the burn */
CONFIG_FPGA_DELAY ();
/* Load the data */
while (bytecount < bsize) {
unsigned char val=0;
#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
if (ctrlc ()) {
(*fn->abort) (cookie);
return FPGA_FAIL;
}
#endif
/* Altera detects an error if INIT goes low (active)
while DONE is low (inactive) */
#if 0 /* not yet implemented */
if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
puts ("** CRC error during FPGA load.\n");
(*fn->abort) (cookie);
return (FPGA_FAIL);
}
#endif
val = data [bytecount ++ ];
i = 8;
do {
/* Deassert the clock */
(*fn->clk) (false, true, cookie);
CONFIG_FPGA_DELAY ();
/* Write data */
(*fn->data) ((val & 0x01), true, cookie);
CONFIG_FPGA_DELAY ();
/* Assert the clock */
(*fn->clk) (true, true, cookie);
CONFIG_FPGA_DELAY ();
val >>= 1;
i --;
} while (i > 0);
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (bytecount % (bsize / 40) == 0)
putc ('.'); /* let them know we are alive */
#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);
}
/*
* "DCLK must be clocked an additional 10 times fpr ACEX 1K..."
*/
for (i = 0; i < 12; i++) {
CONFIG_FPGA_DELAY ();
(*fn->clk) (true, true, cookie); /* Assert the clock pin */
CONFIG_FPGA_DELAY ();
(*fn->clk) (false, true, cookie); /* Deassert the clock pin */
}
ret_val = FPGA_SUCCESS;
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (ret_val == FPGA_SUCCESS) {
puts ("Done.\n");
}
else {
puts ("Fail.\n");
}
#endif
(*fn->post) (cookie);
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
static int ACEX1K_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",
__FUNCTION__);
return FPGA_FAIL;
}