/* * (C) Copyright 2003 * Steven Scholz, imc Measurement & Control, steven.scholz@imc-berlin.de * * (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 * */ #include <common.h> /* core U-Boot definitions */ #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; }