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* Steven Scholz, imc Measurement & Control, steven.scholz@imc-berlin.de
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* Rich Ireland, Enterasys Networks, rireland@enterasys.com.
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* See file CREDITS for list of people who contributed to this
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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#include <common.h> /* core U-Boot definitions */
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#include <ACEX1K.h> /* ACEX device family */
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/* Define FPGA_DEBUG to get debug printf's */
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#define PRINTF(fmt,args...)
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/* Note: The assumption is that we cannot possibly run fast enough to
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* overrun the device (the Slave Parallel mode can free run at 50MHz).
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* If there is a need to operate slower, define CONFIG_FPGA_DELAY in
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* the board config file to slow things down.
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#ifndef CONFIG_FPGA_DELAY
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#define CONFIG_FPGA_DELAY()
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#ifndef CONFIG_SYS_FPGA_WAIT
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#define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ/10 /* 100 ms */
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static int ACEX1K_ps_load( Altera_desc *desc, void *buf, size_t bsize );
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static int ACEX1K_ps_dump( Altera_desc *desc, void *buf, size_t bsize );
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/* static int ACEX1K_ps_info( Altera_desc *desc ); */
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/* ------------------------------------------------------------------------- */
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/* ACEX1K Generic Implementation */
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int ACEX1K_load (Altera_desc * desc, void *buf, size_t bsize)
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int ret_val = FPGA_FAIL;
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switch (desc->iface) {
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PRINTF ("%s: Launching Passive Serial Loader\n", __FUNCTION__);
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ret_val = ACEX1K_ps_load (desc, buf, bsize);
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/* Add new interface types here */
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printf ("%s: Unsupported interface type, %d\n",
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__FUNCTION__, desc->iface);
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int ACEX1K_dump (Altera_desc * desc, void *buf, size_t bsize)
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int ret_val = FPGA_FAIL;
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switch (desc->iface) {
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PRINTF ("%s: Launching Passive Serial Dump\n", __FUNCTION__);
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ret_val = ACEX1K_ps_dump (desc, buf, bsize);
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/* Add new interface types here */
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printf ("%s: Unsupported interface type, %d\n",
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__FUNCTION__, desc->iface);
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int ACEX1K_info( Altera_desc *desc )
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/* ------------------------------------------------------------------------- */
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/* ACEX1K Passive Serial Generic Implementation */
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static int ACEX1K_ps_load (Altera_desc * desc, void *buf, size_t bsize)
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int ret_val = FPGA_FAIL; /* assume the worst */
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Altera_ACEX1K_Passive_Serial_fns *fn = desc->iface_fns;
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PRINTF ("%s: start with interface functions @ 0x%p\n",
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size_t bytecount = 0;
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unsigned char *data = (unsigned char *) buf;
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int cookie = desc->cookie; /* make a local copy */
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unsigned long ts; /* timestamp */
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PRINTF ("%s: Function Table:\n"
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__FUNCTION__, &fn, fn, fn->config, fn->status,
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fn->clk, fn->data, fn->done);
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#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
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printf ("Loading FPGA Device %d...", cookie);
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* Run the pre configuration function if there is one.
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/* Establish the initial state */
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(*fn->config) (TRUE, TRUE, cookie); /* Assert nCONFIG */
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udelay(2); /* T_cfg > 2us */
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/* nSTATUS should be asserted now */
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(*fn->done) (cookie);
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if ( !(*fn->status) (cookie) ) {
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puts ("** nSTATUS is not asserted.\n");
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(*fn->abort) (cookie);
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(*fn->config) (FALSE, TRUE, cookie); /* Deassert nCONFIG */
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udelay(2); /* T_cf2st1 < 4us */
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/* Wait for nSTATUS to be released (i.e. deasserted) */
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ts = get_timer (0); /* get current time */
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CONFIG_FPGA_DELAY ();
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if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */
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puts ("** Timeout waiting for STATUS to go high.\n");
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(*fn->abort) (cookie);
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(*fn->done) (cookie);
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} while ((*fn->status) (cookie));
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/* Get ready for the burn */
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CONFIG_FPGA_DELAY ();
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while (bytecount < bsize) {
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#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
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(*fn->abort) (cookie);
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/* Altera detects an error if INIT goes low (active)
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while DONE is low (inactive) */
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#if 0 /* not yet implemented */
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if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
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puts ("** CRC error during FPGA load.\n");
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(*fn->abort) (cookie);
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val = data [bytecount ++ ];
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/* Deassert the clock */
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(*fn->clk) (FALSE, TRUE, cookie);
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CONFIG_FPGA_DELAY ();
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(*fn->data) ( (val & 0x01), TRUE, cookie);
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CONFIG_FPGA_DELAY ();
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/* Assert the clock */
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(*fn->clk) (TRUE, TRUE, cookie);
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CONFIG_FPGA_DELAY ();
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#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
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if (bytecount % (bsize / 40) == 0)
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putc ('.'); /* let them know we are alive */
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CONFIG_FPGA_DELAY ();
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#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
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putc (' '); /* terminate the dotted line */
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* Checking FPGA's CONF_DONE signal - correctly booted ?
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if ( ! (*fn->done) (cookie) ) {
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puts ("** Booting failed! CONF_DONE is still deasserted.\n");
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(*fn->abort) (cookie);
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* "DCLK must be clocked an additional 10 times fpr ACEX 1K..."
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for (i = 0; i < 12; i++) {
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CONFIG_FPGA_DELAY ();
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(*fn->clk) (TRUE, TRUE, cookie); /* Assert the clock pin */
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CONFIG_FPGA_DELAY ();
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(*fn->clk) (FALSE, TRUE, cookie); /* Deassert the clock pin */
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ret_val = FPGA_SUCCESS;
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#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
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if (ret_val == FPGA_SUCCESS) {
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(*fn->post) (cookie);
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printf ("%s: NULL Interface function table!\n", __FUNCTION__);
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static int ACEX1K_ps_dump (Altera_desc * desc, void *buf, size_t bsize)
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/* Readback is only available through the Slave Parallel and */
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/* boundary-scan interfaces. */
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printf ("%s: Passive Serial Dumping is unavailable\n",