/* * (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 <spartan2.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 Spartan2_sp_load( Xilinx_desc *desc, void *buf, size_t bsize ); static int Spartan2_sp_dump( Xilinx_desc *desc, void *buf, size_t bsize ); /* static int Spartan2_sp_info( Xilinx_desc *desc ); */ static int Spartan2_ss_load( Xilinx_desc *desc, void *buf, size_t bsize ); static int Spartan2_ss_dump( Xilinx_desc *desc, void *buf, size_t bsize ); /* static int Spartan2_ss_info( Xilinx_desc *desc ); */ /* ------------------------------------------------------------------------- */ /* Spartan-II Generic Implementation */ int Spartan2_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 = Spartan2_ss_load (desc, buf, bsize); break; case slave_parallel: PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__); ret_val = Spartan2_sp_load (desc, buf, bsize); break; default: printf ("%s: Unsupported interface type, %d\n", __FUNCTION__, desc->iface); } return ret_val; } int Spartan2_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 = Spartan2_ss_dump (desc, buf, bsize); break; case slave_parallel: PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__); ret_val = Spartan2_sp_dump (desc, buf, bsize); break; default: printf ("%s: Unsupported interface type, %d\n", __FUNCTION__, desc->iface); } return ret_val; } int Spartan2_info( Xilinx_desc *desc ) { return FPGA_SUCCESS; } /* ------------------------------------------------------------------------- */ /* Spartan-II Slave Parallel Generic Implementation */ static int Spartan2_sp_load (Xilinx_desc * desc, void *buf, size_t bsize) { int ret_val = FPGA_FAIL; /* assume the worst */ Xilinx_Spartan2_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) { 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 Spartan2_sp_dump (Xilinx_desc * desc, void *buf, size_t bsize) { int ret_val = FPGA_FAIL; /* assume the worst */ Xilinx_Spartan2_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 Spartan2_ss_load (Xilinx_desc * desc, void *buf, size_t bsize) { int ret_val = FPGA_FAIL; /* assume the worst */ Xilinx_Spartan2_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)) { 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 Spartan2_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; }