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-rw-r--r--board/dave/common/fpga.c256
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diff --git a/board/dave/common/fpga.c b/board/dave/common/fpga.c
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+++ b/board/dave/common/fpga.c
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+/*
+ * (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
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <command.h>
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef FPGA_DEBUG
+#define DBG(x...) printf(x)
+#else
+#define DBG(x...)
+#endif /* DEBUG */
+
+#define MAX_ONES 226
+
+#ifdef CFG_FPGA_PRG
+# define FPGA_PRG CFG_FPGA_PRG /* FPGA program pin (ppc output)*/
+# define FPGA_CLK CFG_FPGA_CLK /* FPGA clk pin (ppc output) */
+# define FPGA_DATA CFG_FPGA_DATA /* FPGA data pin (ppc output) */
+# define FPGA_DONE CFG_FPGA_DONE /* FPGA done pin (ppc input) */
+# define FPGA_INIT CFG_FPGA_INIT /* FPGA init pin (ppc input) */
+#else
+# define FPGA_PRG 0x04000000 /* FPGA program pin (ppc output) */
+# define FPGA_CLK 0x02000000 /* FPGA clk pin (ppc output) */
+# define FPGA_DATA 0x01000000 /* FPGA data pin (ppc output) */
+# define FPGA_DONE 0x00800000 /* FPGA done pin (ppc input) */
+# define FPGA_INIT 0x00400000 /* FPGA init pin (ppc input) */
+#endif
+
+#define ERROR_FPGA_PRG_INIT_LOW -1 /* Timeout after PRG* asserted */
+#define ERROR_FPGA_PRG_INIT_HIGH -2 /* Timeout after PRG* deasserted */
+#define ERROR_FPGA_PRG_DONE -3 /* Timeout after programming */
+
+#define SET_FPGA(data) out32(GPIO0_OR, data)
+
+#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 */
+
+#if 0
+static int fpga_boot (unsigned char *fpgadata, int size)
+{
+ int i, index, len;
+ int count;
+
+#ifdef CFG_FPGA_SPARTAN2
+ int j;
+#else
+ unsigned char b;
+ int bit;
+#endif
+
+ /* display infos on fpgaimage */
+ index = 15;
+ for (i = 0; i < 4; i++) {
+ len = fpgadata[index];
+ DBG ("FPGA: %s\n", &(fpgadata[index + 1]));
+ index += len + 3;
+ }
+
+#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
+
+ DBG ("FPGA: configdata starts at position 0x%x\n", index);
+ DBG ("FPGA: length of fpga-data %d\n", size - index);
+
+ /*
+ * Setup port pins for fpga programming
+ */
+ out32 (GPIO0_ODR, 0x00000000); /* no open drain pins */
+ out32 (GPIO0_TCR, in32 (GPIO0_TCR) | FPGA_PRG | FPGA_CLK | FPGA_DATA); /* setup for output */
+ out32 (GPIO0_OR, in32 (GPIO0_OR) | FPGA_PRG | FPGA_CLK | FPGA_DATA); /* set pins to high */
+
+ DBG ("%s, ",
+ ((in32 (GPIO0_IR) & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
+ DBG ("%s\n",
+ ((in32 (GPIO0_IR) & 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 (in32 (GPIO0_IR) & FPGA_INIT) {
+ udelay (1000); /* wait 1ms */
+ /* Check for timeout - 100us max, so use 3ms */
+ if (count++ > 3) {
+ DBG ("FPGA: Booting failed!\n");
+ return ERROR_FPGA_PRG_INIT_LOW;
+ }
+ }
+
+ DBG ("%s, ",
+ ((in32 (GPIO0_IR) & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
+ DBG ("%s\n",
+ ((in32 (GPIO0_IR) & 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 (!(in32 (GPIO0_IR) & FPGA_INIT)) {
+ udelay (1000); /* wait 1ms */
+ /* Check for timeout */
+ if (count++ > 3) {
+ DBG ("FPGA: Booting failed!\n");
+ return ERROR_FPGA_PRG_INIT_HIGH;
+ }
+ }
+
+ DBG ("%s, ",
+ ((in32 (GPIO0_IR) & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
+ DBG ("%s\n",
+ ((in32 (GPIO0_IR) & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
+
+ DBG ("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++) {
+ for (j = 0; j < 8; j++) {
+ if ((fpgadata[i] & 0x80) == 0x80) {
+ FPGA_WRITE_1;
+ } else {
+ FPGA_WRITE_0;
+ }
+ fpgadata[i] <<= 1;
+ }
+ }
+#else /* ! CFG_FPGA_SPARTAN2 */
+ /* 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 /* CFG_FPGA_SPARTAN2 */
+
+ DBG ("%s, ",
+ ((in32 (GPIO0_IR) & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
+ DBG ("%s\n",
+ ((in32 (GPIO0_IR) & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
+
+ /*
+ * Check if fpga's DONE signal - correctly booted ?
+ */
+
+ /* Wait for FPGA end of programming period . */
+ count = 0;
+ while (!(in32 (GPIO0_IR) & FPGA_DONE)) {
+ udelay (1000); /* wait 1ms */
+ /* Check for timeout */
+ if (count++ > 3) {
+ DBG ("FPGA: Booting failed!\n");
+ return ERROR_FPGA_PRG_DONE;
+ }
+ }
+
+ DBG ("FPGA: Booting successful!\n");
+ return 0;
+}
+#endif /* 0 */
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