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Diffstat (limited to 'board/w7o/fpga.c')
| -rw-r--r-- | board/w7o/fpga.c | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/board/w7o/fpga.c b/board/w7o/fpga.c new file mode 100644 index 0000000..e84123b --- /dev/null +++ b/board/w7o/fpga.c @@ -0,0 +1,380 @@ +/* + * (C) Copyright 2001 + * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com + * and + * Bill Hunter, Wave 7 Optics, william.hunter@mediaone.net + * + * 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 <config.h> +#include <common.h> +#include "w7o.h" +#include <asm/processor.h> +#include "errors.h" + +static void +fpga_img_write(unsigned long *src, unsigned long len, unsigned short *daddr) +{ + unsigned long i; + volatile unsigned long val; + volatile unsigned short *dest = daddr; /* volatile-bypass optimizer */ + + for (i = 0; i < len; i++, src++) { + val = *src; + *dest = (unsigned short)((val & 0xff000000L) >> 16); + *dest = (unsigned short)((val & 0x00ff0000L) >> 8); + *dest = (unsigned short)(val & 0x0000ff00L); + *dest = (unsigned short)((val & 0x000000ffL) << 8); + } + + /* Terminate programming with 4 C clocks */ + dest = daddr; + val = *(unsigned short *)dest; + val = *(unsigned short *)dest; + val = *(unsigned short *)dest; + val = *(unsigned short *)dest; + +} + + +int +fpgaDownload(unsigned char *saddr, + unsigned long size, + unsigned short *daddr) +{ + int i; /* index, intr disable flag */ + int start; /* timer */ + unsigned long greg, grego; /* GPIO & output register */ + unsigned long length; /* image size in words */ + unsigned long *source; /* image source addr */ + unsigned short *dest; /* destination FPGA addr */ + volatile unsigned short *ndest; /* temp dest FPGA addr */ + volatile unsigned short val; /* temp val */ + unsigned long cnfg = GPIO_XCV_CNFG; /* FPGA CNFG */ + unsigned long eirq = GPIO_XCV_IRQ; + int retval = -1; /* Function return value */ + + /* Setup some basic values */ + length = (size / 4) + 1; /* size in words, rounding UP + is OK */ + source = (unsigned long *)saddr; + dest = (unsigned short *)daddr; + + /* Get DCR output register */ + grego = in32(IBM405GP_GPIO0_OR); + + /* Reset FPGA */ + grego &= ~GPIO_XCV_PROG; /* PROG line low */ + out32(IBM405GP_GPIO0_OR, grego); + + /* Setup timeout timer */ + start = get_timer(0); + + /* Wait for FPGA init line */ + while(in32(IBM405GP_GPIO0_IR) & GPIO_XCV_INIT) { /* Wait INIT line low */ + /* Check for timeout - 100us max, so use 3ms */ + if (get_timer(start) > 3) { + printf(" failed to start init.\n"); + log_warn(ERR_XINIT0); /* Don't halt */ + + /* Reset line stays low */ + goto done; /* I like gotos... */ + } + } + + /* Unreset FPGA */ + grego |= GPIO_XCV_PROG; /* PROG line high */ + out32(IBM405GP_GPIO0_OR, grego); + + /* Wait for FPGA end of init period . */ + while(!(in32(IBM405GP_GPIO0_IR) & GPIO_XCV_INIT)) { /* Wait for INIT hi */ + + /* Check for timeout */ + if (get_timer(start) > 3) { + printf(" failed to exit init.\n"); + log_warn(ERR_XINIT1); + + /* Reset FPGA */ + grego &= ~GPIO_XCV_PROG; /* PROG line low */ + out32(IBM405GP_GPIO0_OR, grego); + + goto done; + } + } + + /* Now program FPGA ... */ + ndest = dest; + for (i = 0; i < CONFIG_NUM_FPGAS; i++) { + /* Toggle IRQ/GPIO */ + greg = mfdcr(CPC0_CR0); /* get chip ctrl register */ + greg |= eirq; /* toggle irq/gpio */ + mtdcr(CPC0_CR0, greg); /* ... just do it */ + + /* turn on open drain for CNFG */ + greg = in32(IBM405GP_GPIO0_ODR); /* get open drain register */ + greg |= cnfg; /* CNFG open drain */ + out32(IBM405GP_GPIO0_ODR, greg); /* .. just do it */ + + /* Turn output enable on for CNFG */ + greg = in32(IBM405GP_GPIO0_TCR); /* get tristate register */ + greg |= cnfg; /* CNFG tristate inactive */ + out32(IBM405GP_GPIO0_TCR, greg); /* ... just do it */ + + /* Setup FPGA for programming */ + grego &= ~cnfg; /* CONFIG line low */ + out32(IBM405GP_GPIO0_OR, grego); + + /* + * Program the FPGA + */ + printf("\n destination: 0x%lx ", (unsigned long)ndest); + + fpga_img_write(source, length, (unsigned short *)ndest); + + /* Done programming */ + grego |= cnfg; /* CONFIG line high */ + out32(IBM405GP_GPIO0_OR, grego); + + /* Turn output enable OFF for CNFG */ + greg = in32(IBM405GP_GPIO0_TCR); /* get tristate register */ + greg &= ~cnfg; /* CNFG tristate inactive */ + out32(IBM405GP_GPIO0_TCR, greg); /* ... just do it */ + + /* Toggle IRQ/GPIO */ + greg = mfdcr(CPC0_CR0); /* get chip ctrl register */ + greg &= ~eirq; /* toggle irq/gpio */ + mtdcr(CPC0_CR0, greg); /* ... just do it */ + + ndest = (unsigned short *)((char *)ndest + 0x00100000L); /* XXX - Next FPGA addr */ + cnfg >>= 1; /* XXX - Next */ + eirq >>= 1; + } + + /* Terminate programming with 4 C clocks */ + ndest = dest; + for (i = 0; i < CONFIG_NUM_FPGAS; i++) { + val = *ndest; + val = *ndest; + val = *ndest; + val = *ndest; + ndest = (unsigned short *)((char *)ndest + 0x00100000L); + } + + /* Setup timer */ + start = get_timer(0); + + /* Wait for FPGA end of programming period . */ + while(!(in32(IBM405GP_GPIO0_IR) & GPIO_XCV_DONE)) { /* Test DONE low */ + + /* Check for timeout */ + if (get_timer(start) > 3) { + printf(" done failed to come high.\n"); + log_warn(ERR_XDONE1); + + /* Reset FPGA */ + grego &= ~GPIO_XCV_PROG; /* PROG line low */ + out32(IBM405GP_GPIO0_OR, grego); + + goto done; + } + } + + printf("\n FPGA load succeeded\n"); + retval = 0; /* Program OK */ + +done: + return retval; +} + +/* FPGA image is stored in flash */ +extern flash_info_t flash_info[]; + +int init_fpga(void) +{ + unsigned int i,j,ptr; /* General purpose */ + unsigned char bufchar; /* General purpose character */ + unsigned char *buf; /* Start of image pointer */ + unsigned long len; /* Length of image */ + unsigned char *fn_buf; /* Start of filename string */ + unsigned int fn_len; /* Length of filename string */ + unsigned char *xcv_buf; /* Pointer to start of image */ + unsigned long xcv_len; /* Length of image */ + unsigned long crc; /* 30bit crc in image */ + unsigned long calc_crc; /* Calc'd 30bit crc */ + int retval = -1; + + /* Tell the world what we are doing */ + printf("FPGA: "); + + /* + * Get address of first sector where the FPGA + * image is stored. + */ + buf = (unsigned char *)flash_info[1].start[0]; + + /* + * Get the stored image's CRC & length. + */ + crc = *(unsigned long *)(buf+4); /* CRC is first long word */ + len = *(unsigned long *)(buf+8); /* Image len is next long */ + + /* Pedantic */ + if ((len < 0x133A4) || (len > 0x80000)) + goto bad_image; + + /* + * Get the file name pointer and length. + */ + fn_len = (*(unsigned short *)(buf+12) & 0xff); /* filename length + is next short */ + fn_buf = buf + 14; + + /* + * Get the FPGA image pointer and length length. + */ + xcv_buf = fn_buf + fn_len; /* pointer to fpga image */ + xcv_len = len - 14 - fn_len; /* fpga image length */ + + /* Check for uninitialized FLASH */ + if ((strncmp(buf, "w7o", 3)!=0) || (len > 0x0007ffffL) || (len == 0)) + goto bad_image; + + /* + * Calculate and Check the image's CRC. + */ + calc_crc = crc32(0, xcv_buf, xcv_len); + if (crc != calc_crc) { + printf("\nfailed - bad CRC\n"); + goto done; + } + + /* Output the file name */ + printf("file name : "); + for (i=0;i<fn_len;i++) { + bufchar = fn_buf[+i]; + if (bufchar<' ' || bufchar>'~') bufchar = '.'; + putc(bufchar); + } + + /* + * find rest of display data + */ + ptr = 15; /* Offset to ncd filename + length in fpga image */ + j = xcv_buf[ptr]; /* Get len of ncd filename */ + if (j > 32) goto bad_image; + ptr = ptr + j + 3; /* skip ncd filename string + + 3 bytes more bytes */ + + /* + * output target device string + */ + j = xcv_buf[ptr++] - 1; /* len of targ str less term */ + if (j > 32) goto bad_image; + printf("\n target : "); + for (i = 0; i < j; i++) { + bufchar = (xcv_buf[ptr++]); + if (bufchar<' ' || bufchar>'~') bufchar = '.'; + putc(bufchar); + } + + /* + * output compilation date string and time string + */ + ptr += 3; /* skip 2 bytes */ + printf("\n synth time : "); + j = (xcv_buf[ptr++] - 1); /* len of date str less term */ + if (j > 32) goto bad_image; + for (i = 0; i < j; i++) { + bufchar = (xcv_buf[ptr++]); + if (bufchar<' ' || bufchar>'~') bufchar = '.'; + putc(bufchar); + } + + ptr += 3; /* Skip 2 bytes */ + printf(" - "); + j = (xcv_buf[ptr++] - 1); /* slen = targ dev str len */ + if (j > 32) goto bad_image; + for (i = 0; i < j; i++) { + bufchar = (xcv_buf[ptr++]); + if (bufchar<' ' || bufchar>'~') bufchar = '.'; + putc(bufchar); + } + + /* + * output crc and length strings + */ + printf("\n len & crc : 0x%lx 0x%lx", len, crc); + + /* + * Program the FPGA. + */ + retval = fpgaDownload((unsigned char*)xcv_buf, xcv_len, + (unsigned short *)0xfd000000L); + return retval; + +bad_image: + printf("\n BAD FPGA image format @ %lx\n", flash_info[1].start[0]); + log_warn(ERR_XIMAGE); +done: + return retval; +} + +void test_fpga(unsigned short *daddr) +{ + int i; + volatile unsigned short *ndest = daddr; + + for (i = 0; i < CONFIG_NUM_FPGAS; i++) { +#if defined(CONFIG_W7OLMG) + ndest[0x7e] = 0x55aa; + if (ndest[0x7e] != 0x55aa) + log_warn(ERR_XRW1 + i); + ndest[0x7e] = 0xaa55; + if (ndest[0x7e] != 0xaa55) + log_warn(ERR_XRW1 + i); + ndest[0x7e] = 0xc318; + if (ndest[0x7e] != 0xc318) + log_warn(ERR_XRW1 + i); + +#elif defined(CONFIG_W7OLMC) + ndest[0x800] = 0x55aa; + ndest[0x801] = 0xaa55; + ndest[0x802] = 0xc318; + ndest[0x4800] = 0x55aa; + ndest[0x4801] = 0xaa55; + ndest[0x4802] = 0xc318; + if ((ndest[0x800] != 0x55aa) || + (ndest[0x801] != 0xaa55) || + (ndest[0x802] != 0xc318)) + log_warn(ERR_XRW1 + (2 * i)); /* Auto gen error code */ + if ((ndest[0x4800] != 0x55aa) || + (ndest[0x4801] != 0xaa55) || + (ndest[0x4802] != 0xc318)) + log_warn(ERR_XRW2 + (2 * i)); /* Auto gen error code */ + +#else +# error "Unknown W7O board configuration" +#endif + } + + printf(" FPGA ready\n"); + return; +} + |