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u-boot/drivers/fpga/spartan3.c
Matthias Fuchs 670cbde8da fpga: Fix Spartan III FPGA booting 
This patch does some minor fixing of the Xilinx Spartan III
FPGA boot code:

- Fixed call order of post configuration callback and
  success message printing (result of copy-paste?)
- remove obsolete comment
- minor coding style cleanup

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
2009-02-21 22:52:44 +01:00

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/*
* (C) Copyright 2002
* Rich Ireland, Enterasys Networks, rireland@enterasys.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/*
* Configuration support for Xilinx Spartan3 devices. Based
* on spartan2.c (Rich Ireland, rireland@enterasys.com).
*/
#include <common.h> /* core U-Boot definitions */
#include <spartan3.h> /* Spartan-II 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
#undef CONFIG_SYS_FPGA_CHECK_BUSY
#undef CONFIG_SYS_FPGA_PROG_FEEDBACK
/* 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/100 /* 10 ms */
#endif
static int Spartan3_sp_load( Xilinx_desc *desc, void *buf, size_t bsize );
static int Spartan3_sp_dump( Xilinx_desc *desc, void *buf, size_t bsize );
/* static int Spartan3_sp_info( Xilinx_desc *desc ); */
static int Spartan3_sp_reloc( Xilinx_desc *desc, ulong reloc_offset );
static int Spartan3_ss_load( Xilinx_desc *desc, void *buf, size_t bsize );
static int Spartan3_ss_dump( Xilinx_desc *desc, void *buf, size_t bsize );
/* static int Spartan3_ss_info( Xilinx_desc *desc ); */
static int Spartan3_ss_reloc( Xilinx_desc *desc, ulong reloc_offset );
/* ------------------------------------------------------------------------- */
/* Spartan-II Generic Implementation */
int Spartan3_load (Xilinx_desc * desc, void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL;
switch (desc->iface) {
case slave_serial:
PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
ret_val = Spartan3_ss_load (desc, buf, bsize);
break;
case slave_parallel:
PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
ret_val = Spartan3_sp_load (desc, buf, bsize);
break;
default:
printf ("%s: Unsupported interface type, %d\n",
__FUNCTION__, desc->iface);
}
return ret_val;
}
int Spartan3_dump (Xilinx_desc * desc, void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL;
switch (desc->iface) {
case slave_serial:
PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
ret_val = Spartan3_ss_dump (desc, buf, bsize);
break;
case slave_parallel:
PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
ret_val = Spartan3_sp_dump (desc, buf, bsize);
break;
default:
printf ("%s: Unsupported interface type, %d\n",
__FUNCTION__, desc->iface);
}
return ret_val;
}
int Spartan3_info( Xilinx_desc *desc )
{
return FPGA_SUCCESS;
}
int Spartan3_reloc (Xilinx_desc * desc, ulong reloc_offset)
{
int ret_val = FPGA_FAIL; /* assume a failure */
if (desc->family != Xilinx_Spartan3) {
printf ("%s: Unsupported family type, %d\n",
__FUNCTION__, desc->family);
return FPGA_FAIL;
} else
switch (desc->iface) {
case slave_serial:
ret_val = Spartan3_ss_reloc (desc, reloc_offset);
break;
case slave_parallel:
ret_val = Spartan3_sp_reloc (desc, reloc_offset);
break;
default:
printf ("%s: Unsupported interface type, %d\n",
__FUNCTION__, desc->iface);
}
return ret_val;
}
/* ------------------------------------------------------------------------- */
/* Spartan-II Slave Parallel Generic Implementation */
static int Spartan3_sp_load (Xilinx_desc * desc, void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
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"
"pre: 0x%p\n"
"pgm:\t0x%p\n"
"init:\t0x%p\n"
"err:\t0x%p\n"
"clk:\t0x%p\n"
"cs:\t0x%p\n"
"wr:\t0x%p\n"
"read data:\t0x%p\n"
"write data:\t0x%p\n"
"busy:\t0x%p\n"
"abort:\t0x%p\n",
"post:\t0x%p\n\n",
__FUNCTION__, &fn, fn, fn->pre, fn->pgm, fn->init, fn->err,
fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata, fn->busy,
fn->abort, fn->post);
/*
* This code is designed to emulate the "Express Style"
* Continuous Data Loading in Slave Parallel Mode for
* the Spartan-II Family.
*/
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
printf ("Loading FPGA Device %d...\n", cookie);
#endif
/*
* Run the pre configuration function if there is one.
*/
if (*fn->pre) {
(*fn->pre) (cookie);
}
/* Establish the initial state */
(*fn->pgm) (TRUE, TRUE, cookie); /* Assert the program, commit */
/* Get ready for the burn */
CONFIG_FPGA_DELAY ();
(*fn->pgm) (FALSE, TRUE, cookie); /* Deassert the program, commit */
ts = get_timer (0); /* get current time */
/* Now wait for INIT and BUSY to go high */
do {
CONFIG_FPGA_DELAY ();
if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
puts ("** Timeout waiting for INIT to clear.\n");
(*fn->abort) (cookie); /* abort the burn */
return FPGA_FAIL;
}
} while ((*fn->init) (cookie) && (*fn->busy) (cookie));
(*fn->wr) (TRUE, TRUE, cookie); /* Assert write, commit */
(*fn->cs) (TRUE, TRUE, cookie); /* Assert chip select, commit */
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
/* Load the data */
while (bytecount < bsize) {
/* XXX - do we check for an Ctrl-C press in here ??? */
/* XXX - Check the error bit? */
(*fn->wdata) (data[bytecount++], TRUE, cookie); /* write the data */
CONFIG_FPGA_DELAY ();
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
CONFIG_FPGA_DELAY ();
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
#ifdef CONFIG_SYS_FPGA_CHECK_BUSY
ts = get_timer (0); /* get current time */
while ((*fn->busy) (cookie)) {
/* XXX - we should have a check in here somewhere to
* make sure we aren't busy forever... */
CONFIG_FPGA_DELAY ();
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
CONFIG_FPGA_DELAY ();
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
puts ("** Timeout waiting for BUSY to clear.\n");
(*fn->abort) (cookie); /* abort the burn */
return FPGA_FAIL;
}
}
#endif
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (bytecount % (bsize / 40) == 0)
putc ('.'); /* let them know we are alive */
#endif
}
CONFIG_FPGA_DELAY ();
(*fn->cs) (FALSE, TRUE, cookie); /* Deassert the chip select */
(*fn->wr) (FALSE, TRUE, cookie); /* Deassert the write pin */
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
putc ('\n'); /* terminate the dotted line */
#endif
/* now check for done signal */
ts = get_timer (0); /* get current time */
ret_val = FPGA_SUCCESS;
while ((*fn->done) (cookie) == FPGA_FAIL) {
/* XXX - we should have a check in here somewhere to
* make sure we aren't busy forever... */
CONFIG_FPGA_DELAY ();
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
CONFIG_FPGA_DELAY ();
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
puts ("** Timeout waiting for DONE to clear.\n");
(*fn->abort) (cookie); /* abort the burn */
ret_val = FPGA_FAIL;
break;
}
}
/*
* Run the post configuration function if there is one.
*/
if (*fn->post)
(*fn->post) (cookie);
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (ret_val == FPGA_SUCCESS)
puts ("Done.\n");
else
puts ("Fail.\n");
#endif
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
static int Spartan3_sp_dump (Xilinx_desc * desc, void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
if (fn) {
unsigned char *data = (unsigned char *) buf;
size_t bytecount = 0;
int cookie = desc->cookie; /* make a local copy */
printf ("Starting Dump of FPGA Device %d...\n", cookie);
(*fn->cs) (TRUE, TRUE, cookie); /* Assert chip select, commit */
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
/* dump the data */
while (bytecount < bsize) {
/* XXX - do we check for an Ctrl-C press in here ??? */
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
(*fn->rdata) (&(data[bytecount++]), cookie); /* read the data */
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (bytecount % (bsize / 40) == 0)
putc ('.'); /* let them know we are alive */
#endif
}
(*fn->cs) (FALSE, FALSE, cookie); /* Deassert the chip select */
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
putc ('\n'); /* terminate the dotted line */
#endif
puts ("Done.\n");
/* XXX - checksum the data? */
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
static int Spartan3_sp_reloc (Xilinx_desc * desc, ulong reloc_offset)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Xilinx_Spartan3_Slave_Parallel_fns *fn_r, *fn =
(Xilinx_Spartan3_Slave_Parallel_fns *) (desc->iface_fns);
if (fn) {
ulong addr;
/* Get the relocated table address */
addr = (ulong) fn + reloc_offset;
fn_r = (Xilinx_Spartan3_Slave_Parallel_fns *) addr;
if (!fn_r->relocated) {
if (memcmp (fn_r, fn,
sizeof (Xilinx_Spartan3_Slave_Parallel_fns))
== 0) {
/* good copy of the table, fix the descriptor pointer */
desc->iface_fns = fn_r;
} else {
PRINTF ("%s: Invalid function table at 0x%p\n",
__FUNCTION__, fn_r);
return FPGA_FAIL;
}
PRINTF ("%s: Relocating descriptor at 0x%p\n", __FUNCTION__,
desc);
addr = (ulong) (fn->pre) + reloc_offset;
fn_r->pre = (Xilinx_pre_fn) addr;
addr = (ulong) (fn->pgm) + reloc_offset;
fn_r->pgm = (Xilinx_pgm_fn) addr;
addr = (ulong) (fn->init) + reloc_offset;
fn_r->init = (Xilinx_init_fn) addr;
addr = (ulong) (fn->done) + reloc_offset;
fn_r->done = (Xilinx_done_fn) addr;
addr = (ulong) (fn->clk) + reloc_offset;
fn_r->clk = (Xilinx_clk_fn) addr;
addr = (ulong) (fn->err) + reloc_offset;
fn_r->err = (Xilinx_err_fn) addr;
addr = (ulong) (fn->cs) + reloc_offset;
fn_r->cs = (Xilinx_cs_fn) addr;
addr = (ulong) (fn->wr) + reloc_offset;
fn_r->wr = (Xilinx_wr_fn) addr;
addr = (ulong) (fn->rdata) + reloc_offset;
fn_r->rdata = (Xilinx_rdata_fn) addr;
addr = (ulong) (fn->wdata) + reloc_offset;
fn_r->wdata = (Xilinx_wdata_fn) addr;
addr = (ulong) (fn->busy) + reloc_offset;
fn_r->busy = (Xilinx_busy_fn) addr;
addr = (ulong) (fn->abort) + reloc_offset;
fn_r->abort = (Xilinx_abort_fn) addr;
addr = (ulong) (fn->post) + reloc_offset;
fn_r->post = (Xilinx_post_fn) addr;
fn_r->relocated = TRUE;
} else {
/* this table has already been moved */
/* XXX - should check to see if the descriptor is correct */
desc->iface_fns = fn_r;
}
ret_val = FPGA_SUCCESS;
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
/* ------------------------------------------------------------------------- */
static int Spartan3_ss_load (Xilinx_desc * desc, void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Xilinx_Spartan3_Slave_Serial_fns *fn = desc->iface_fns;
int i;
unsigned char val;
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"
"pgm:\t0x%p\n"
"init:\t0x%p\n"
"clk:\t0x%p\n"
"wr:\t0x%p\n"
"done:\t0x%p\n\n",
__FUNCTION__, &fn, fn, fn->pgm, fn->init,
fn->clk, fn->wr, fn->done);
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
printf ("Loading FPGA Device %d...\n", cookie);
#endif
/*
* Run the pre configuration function if there is one.
*/
if (*fn->pre) {
(*fn->pre) (cookie);
}
/* Establish the initial state */
(*fn->pgm) (TRUE, TRUE, cookie); /* Assert the program, commit */
/* Wait for INIT state (init low) */
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 INIT to start.\n");
return FPGA_FAIL;
}
} while (!(*fn->init) (cookie));
/* Get ready for the burn */
CONFIG_FPGA_DELAY ();
(*fn->pgm) (FALSE, TRUE, cookie); /* Deassert the program, commit */
ts = get_timer (0); /* get current time */
/* Now wait for INIT to go high */
do {
CONFIG_FPGA_DELAY ();
if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
puts ("** Timeout waiting for INIT to clear.\n");
return FPGA_FAIL;
}
} while ((*fn->init) (cookie));
/* Load the data */
while (bytecount < bsize) {
/* Xilinx detects an error if INIT goes low (active)
while DONE is low (inactive) */
if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
puts ("** CRC error during FPGA load.\n");
return (FPGA_FAIL);
}
val = data [bytecount ++];
i = 8;
do {
/* Deassert the clock */
(*fn->clk) (FALSE, TRUE, cookie);
CONFIG_FPGA_DELAY ();
/* Write data */
(*fn->wr) ((val & 0x80), 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 ('\n'); /* terminate the dotted line */
#endif
/* now check for done signal */
ts = get_timer (0); /* get current time */
ret_val = FPGA_SUCCESS;
(*fn->wr) (TRUE, TRUE, cookie);
while (! (*fn->done) (cookie)) {
/* XXX - we should have a check in here somewhere to
* make sure we aren't busy forever... */
CONFIG_FPGA_DELAY ();
(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
CONFIG_FPGA_DELAY ();
(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
putc ('*');
if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
puts ("** Timeout waiting for DONE to clear.\n");
ret_val = FPGA_FAIL;
break;
}
}
putc ('\n'); /* terminate the dotted line */
/*
* Run the post configuration function if there is one.
*/
if (*fn->post)
(*fn->post) (cookie);
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if (ret_val == FPGA_SUCCESS)
puts ("Done.\n");
else
puts ("Fail.\n");
#endif
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
static int Spartan3_ss_dump (Xilinx_desc * desc, void *buf, size_t bsize)
{
/* Readback is only available through the Slave Parallel and */
/* boundary-scan interfaces. */
printf ("%s: Slave Serial Dumping is unavailable\n",
__FUNCTION__);
return FPGA_FAIL;
}
static int Spartan3_ss_reloc (Xilinx_desc * desc, ulong reloc_offset)
{
int ret_val = FPGA_FAIL; /* assume the worst */
Xilinx_Spartan3_Slave_Serial_fns *fn_r, *fn =
(Xilinx_Spartan3_Slave_Serial_fns *) (desc->iface_fns);
if (fn) {
ulong addr;
/* Get the relocated table address */
addr = (ulong) fn + reloc_offset;
fn_r = (Xilinx_Spartan3_Slave_Serial_fns *) addr;
if (!fn_r->relocated) {
if (memcmp (fn_r, fn,
sizeof (Xilinx_Spartan3_Slave_Serial_fns))
== 0) {
/* good copy of the table, fix the descriptor pointer */
desc->iface_fns = fn_r;
} else {
PRINTF ("%s: Invalid function table at 0x%p\n",
__FUNCTION__, fn_r);
return FPGA_FAIL;
}
PRINTF ("%s: Relocating descriptor at 0x%p\n", __FUNCTION__,
desc);
if (fn->pre) {
addr = (ulong) (fn->pre) + reloc_offset;
fn_r->pre = (Xilinx_pre_fn) addr;
}
addr = (ulong) (fn->pgm) + reloc_offset;
fn_r->pgm = (Xilinx_pgm_fn) addr;
addr = (ulong) (fn->init) + reloc_offset;
fn_r->init = (Xilinx_init_fn) addr;
addr = (ulong) (fn->done) + reloc_offset;
fn_r->done = (Xilinx_done_fn) addr;
addr = (ulong) (fn->clk) + reloc_offset;
fn_r->clk = (Xilinx_clk_fn) addr;
addr = (ulong) (fn->wr) + reloc_offset;
fn_r->wr = (Xilinx_wr_fn) addr;
if (fn->post) {
addr = (ulong) (fn->post) + reloc_offset;
fn_r->post = (Xilinx_post_fn) addr;
}
fn_r->relocated = TRUE;
} else {
/* this table has already been moved */
/* XXX - should check to see if the descriptor is correct */
desc->iface_fns = fn_r;
}
ret_val = FPGA_SUCCESS;
} else {
printf ("%s: NULL Interface function table!\n", __FUNCTION__);
}
return ret_val;
}
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