Initial revision
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;
+}
+