diff options
Diffstat (limited to 'firmware/fx2/usrp1/fpga_load.c')
| -rw-r--r-- | firmware/fx2/usrp1/fpga_load.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/firmware/fx2/usrp1/fpga_load.c b/firmware/fx2/usrp1/fpga_load.c new file mode 100644 index 000000000..c3ae9e707 --- /dev/null +++ b/firmware/fx2/usrp1/fpga_load.c @@ -0,0 +1,193 @@ +/* + * USRP - Universal Software Radio Peripheral + * + * Copyright (C) 2003 Free Software Foundation, Inc. + * + * 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 3 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., 51 Franklin Street, Boston, MA 02110-1301 USA + */ + +#include "usrp_common.h" +#include "fpga_load.h" +#include "delay.h" + +/* + * setup altera FPGA serial load (PS). + * + * On entry: + * don't care + * + * On exit: + * ALTERA_DCLK = 0 + * ALTERA_NCONFIG = 1 + * ALTERA_NSTATUS = 1 (input) + */ +unsigned char +fpga_load_begin (void) +{ + USRP_ALTERA_CONFIG &= ~bmALTERA_BITS; // clear all bits (NCONFIG low) + udelay (40); // wait 40 us + USRP_ALTERA_CONFIG |= bmALTERA_NCONFIG; // set NCONFIG high + + if (UC_BOARD_HAS_FPGA){ + // FIXME should really cap this loop with a counter so we + // don't hang forever on a hardware failure. + while ((USRP_ALTERA_CONFIG & bmALTERA_NSTATUS) == 0) // wait for NSTATUS to go high + ; + } + + // ready to xfer now + + return 1; +} + +/* + * clock out the low bit of bits. + * + * On entry: + * ALTERA_DCLK = 0 + * ALTERA_NCONFIG = 1 + * ALTERA_NSTATUS = 1 (input) + * + * On exit: + * ALTERA_DCLK = 0 + * ALTERA_NCONFIG = 1 + * ALTERA_NSTATUS = 1 (input) + */ + + +#if 0 + +static void +clock_out_config_byte (unsigned char bits) +{ + unsigned char i; + + // clock out configuration byte, least significant bit first + + for (i = 0; i < 8; i++){ + + USRP_ALTERA_CONFIG = ((USRP_ALTERA_CONFIG & ~bmALTERA_DATA0) | ((bits & 1) ? bmALTERA_DATA0 : 0)); + USRP_ALTERA_CONFIG |= bmALTERA_DCLK; /* set DCLK to 1 */ + USRP_ALTERA_CONFIG &= ~bmALTERA_DCLK; /* set DCLK to 0 */ + + bits = bits >> 1; + } +} + +#else + +static void +clock_out_config_byte (unsigned char bits) _naked +{ + _asm + mov a, dpl + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + rrc a + mov _bitALTERA_DATA0,c + setb _bitALTERA_DCLK + clr _bitALTERA_DCLK + + ret + + _endasm; +} + +#endif + +static void +clock_out_bytes (unsigned char bytecount, + unsigned char xdata *p) +{ + while (bytecount-- > 0) + clock_out_config_byte (*p++); +} + +/* + * Transfer block of bytes from packet to FPGA serial configuration port + * + * On entry: + * ALTERA_DCLK = 0 + * ALTERA_NCONFIG = 1 + * ALTERA_NSTATUS = 1 (input) + * + * On exit: + * ALTERA_DCLK = 0 + * ALTERA_NCONFIG = 1 + * ALTERA_NSTATUS = 1 (input) + */ +unsigned char +fpga_load_xfer (xdata unsigned char *p, unsigned char bytecount) +{ + clock_out_bytes (bytecount, p); + return 1; +} + +/* + * check for successful load... + */ +unsigned char +fpga_load_end (void) +{ + unsigned char status = USRP_ALTERA_CONFIG; + + if (!UC_BOARD_HAS_FPGA) // always true if we don't have FPGA + return 1; + + if ((status & bmALTERA_NSTATUS) == 0) // failed to program + return 0; + + if ((status & bmALTERA_CONF_DONE) == bmALTERA_CONF_DONE) + return 1; // everything's cool + + // I don't think this should happen. It indicates that + // programming is still in progress. + + return 0; +} |