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author | wdenk <wdenk> | 2004-09-29 11:02:56 +0000 |
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committer | wdenk <wdenk> | 2004-09-29 11:02:56 +0000 |
commit | da93ed8147a000505ac7b7ed4e2fb50532596a3c (patch) | |
tree | f375a3f5d82d1f519f77d9446ccf147f2091548f /board/quantum/fpga.c | |
parent | a5725fabc0c6378f583df6fc6491ec07eab154ab (diff) | |
download | u-boot-imx-da93ed8147a000505ac7b7ed4e2fb50532596a3c.zip u-boot-imx-da93ed8147a000505ac7b7ed4e2fb50532596a3c.tar.gz u-boot-imx-da93ed8147a000505ac7b7ed4e2fb50532596a3c.tar.bz2 |
* Patch by Shlomo Kut, 29 Mar 2004:
Add support for MKS Instruments "Quantum" board
* Fix build problem with Cogent boards;
avoid using <asm/byteorder.h> when using the host compiler
Diffstat (limited to 'board/quantum/fpga.c')
-rw-r--r-- | board/quantum/fpga.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/board/quantum/fpga.c b/board/quantum/fpga.c new file mode 100644 index 0000000..75c2658 --- /dev/null +++ b/board/quantum/fpga.c @@ -0,0 +1,263 @@ +/* + * (C) Copyright 2001-2003 + * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com + * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.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 + */ +/* The DEBUG define must be before common to enable debugging */ +#undef DEBUG +#include <common.h> +#include <asm/processor.h> +#include <command.h> +#include "fpga.h" +/* ------------------------------------------------------------------------- */ + +#define MAX_ONES 226 + +/* MPC850 port D */ +#define PD(bit) (1 << (15 - (bit))) +# define FPGA_INIT PD(11) /* FPGA init pin (ppc input) */ +# define FPGA_PRG PD(12) /* FPGA program pin (ppc output) */ +# define FPGA_CLK PD(13) /* FPGA clk pin (ppc output) */ +# define FPGA_DATA PD(14) /* FPGA data pin (ppc output) */ +# define FPGA_DONE PD(15) /* FPGA done pin (ppc input) */ + + +/* DDR 0 - input, 1 - output */ +#define FPGA_INIT_PDDIR FPGA_PRG | FPGA_CLK | FPGA_DATA /* just set outputs */ + + +#define SET_FPGA(data) immr->im_ioport.iop_pddat = (data) +#define GET_FPGA immr->im_ioport.iop_pddat + +#define FPGA_WRITE_1 { \ + SET_FPGA(FPGA_PRG | FPGA_DATA); /* set clock to 0 */ \ + SET_FPGA(FPGA_PRG | FPGA_DATA); /* set data to 1 */ \ + SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA); /* set clock to 1 */ \ + SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);} /* set data to 1 */ + +#define FPGA_WRITE_0 { \ + SET_FPGA(FPGA_PRG | FPGA_DATA); /* set clock to 0 */ \ + SET_FPGA(FPGA_PRG); /* set data to 0 */ \ + SET_FPGA(FPGA_PRG | FPGA_CLK); /* set clock to 1 */ \ + SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);} /* set data to 1 */ + + +int fpga_boot (unsigned char *fpgadata, int size) +{ + volatile immap_t *immr = (immap_t *) CFG_IMMR; + int i, index, len; + int count; + +#ifdef CFG_FPGA_SPARTAN2 + int j; + unsigned char data; +#else + unsigned char b; + int bit; +#endif + + debug ("fpga_boot: fpgadata = %p, size = %d\n", fpgadata, size); + + /* display infos on fpgaimage */ + printf ("FPGA:"); + index = 15; + for (i = 0; i < 4; i++) { + len = fpgadata[index]; + printf (" %s", &(fpgadata[index + 1])); + index += len + 3; + } + printf ("\n"); + + + index = 0; + +#ifdef CFG_FPGA_SPARTAN2 + /* search for preamble 0xFFFFFFFF */ + while (1) { + if ((fpgadata[index] == 0xff) && (fpgadata[index + 1] == 0xff) + && (fpgadata[index + 2] == 0xff) + && (fpgadata[index + 3] == 0xff)) + break; /* preamble found */ + else + index++; + } +#else + /* search for preamble 0xFF2X */ + for (index = 0; index < size - 1; index++) { + if ((fpgadata[index] == 0xff) + && ((fpgadata[index + 1] & 0xf0) == 0x30)) + break; + } + index += 2; +#endif + + debug ("FPGA: configdata starts at position 0x%x\n", index); + debug ("FPGA: length of fpga-data %d\n", size - index); + + /* + * Setup port pins for fpga programming + */ + immr->im_ioport.iop_pddir = FPGA_INIT_PDDIR; + + debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE"); + debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT"); + + /* + * Init fpga by asserting and deasserting PROGRAM* + */ + SET_FPGA (FPGA_CLK | FPGA_DATA); + + /* Wait for FPGA init line low */ + count = 0; + while (GET_FPGA & FPGA_INIT) { + udelay (1000); /* wait 1ms */ + /* Check for timeout - 100us max, so use 3ms */ + if (count++ > 3) { + debug ("FPGA: Booting failed!\n"); + return ERROR_FPGA_PRG_INIT_LOW; + } + } + + debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE"); + debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT"); + + /* deassert PROGRAM* */ + SET_FPGA (FPGA_PRG | FPGA_CLK | FPGA_DATA); + + /* Wait for FPGA end of init period . */ + count = 0; + while (!(GET_FPGA & FPGA_INIT)) { + udelay (1000); /* wait 1ms */ + /* Check for timeout */ + if (count++ > 3) { + debug ("FPGA: Booting failed!\n"); + return ERROR_FPGA_PRG_INIT_HIGH; + } + } + + debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE"); + debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT"); + + debug ("write configuration data into fpga\n"); + /* write configuration-data into fpga... */ + +#ifdef CFG_FPGA_SPARTAN2 + /* + * Load uncompressed image into fpga + */ + for (i = index; i < size; i++) { +#ifdef CFG_FPGA_PROG_FEEDBACK + if ((i % 1024) == 0) + printf ("%6d out of %6d\r", i, size); /* let them know we are alive */ +#endif + + data = fpgadata[i]; + for (j = 0; j < 8; j++) { + if ((data & 0x80) == 0x80) { + FPGA_WRITE_1; + } else { + FPGA_WRITE_0; + } + data <<= 1; + } + } + /* add some 0xff to the end of the file */ + for (i = 0; i < 8; i++) { + data = 0xff; + for (j = 0; j < 8; j++) { + if ((data & 0x80) == 0x80) { + FPGA_WRITE_1; + } else { + FPGA_WRITE_0; + } + data <<= 1; + } + } +#else + /* send 0xff 0x20 */ + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_1; + FPGA_WRITE_0; + FPGA_WRITE_0; + FPGA_WRITE_1; + FPGA_WRITE_0; + FPGA_WRITE_0; + FPGA_WRITE_0; + FPGA_WRITE_0; + FPGA_WRITE_0; + + /* + ** Bit_DeCompression + ** Code 1 .. maxOnes : n '1's followed by '0' + ** maxOnes + 1 .. maxOnes + 1 : n - 1 '1's no '0' + ** maxOnes + 2 .. 254 : n - (maxOnes + 2) '0's followed by '1' + ** 255 : '1' + */ + + for (i = index; i < size; i++) { + b = fpgadata[i]; + if ((b >= 1) && (b <= MAX_ONES)) { + for (bit = 0; bit < b; bit++) { + FPGA_WRITE_1; + } + FPGA_WRITE_0; + } else if (b == (MAX_ONES + 1)) { + for (bit = 1; bit < b; bit++) { + FPGA_WRITE_1; + } + } else if ((b >= (MAX_ONES + 2)) && (b <= 254)) { + for (bit = 0; bit < (b - (MAX_ONES + 2)); bit++) { + FPGA_WRITE_0; + } + FPGA_WRITE_1; + } else if (b == 255) { + FPGA_WRITE_1; + } + } +#endif + debug ("\n\n"); + debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE"); + debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT"); + + /* + * Check if fpga's DONE signal - correctly booted ? + */ + + /* Wait for FPGA end of programming period . */ + count = 0; + while (!(GET_FPGA & FPGA_DONE)) { + udelay (1000); /* wait 1ms */ + /* Check for timeout */ + if (count++ > 3) { + debug ("FPGA: Booting failed!\n"); + return ERROR_FPGA_PRG_DONE; + } + } + + debug ("FPGA: Booting successful!\n"); + return 0; +} |