1 files changed, 264 insertions, 0 deletions
diff --git a/board/prodrive/alpr/fpga.c b/board/prodrive/alpr/fpga.c
new file mode 100644
index 0000000..78307b4
--- /dev/null
+++ b/board/prodrive/alpr/fpga.c
@@ -0,0 +1,264 @@
+/*
+ * (C) Copyright 2006
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de
+ *
+ * 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
+ *
+ */
+
+/*
+ * Altera FPGA configuration support for the ALPR computer from prodrive
+ */
+
+#include <common.h>
+#include <altera.h>
+#include <ACEX1K.h>
+#include <command.h>
+#include <asm-ppc/processor.h>
+#include <ppc440.h>
+#include "fpga.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if (CONFIG_FPGA)
+
+#ifdef FPGA_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define	PRINTF(fmt,args...)
+#endif
+
+static	unsigned long	regval;
+
+#define SET_GPIO_REG_0(reg, bit) {\
+					regval = in32(reg);\
+					regval &= ~(0x80000000 >> bit);\
+					out32(reg, regval);\
+					}
+
+#define SET_GPIO_REG_1(reg, bit) {\
+					regval = in32(reg);\
+					regval |= (0x80000000 >> bit);\
+					out32(reg, regval);\
+					}
+
+#define	GPIO_CLK_PIN			0x00002000
+#define	GPIO_CLK_PIN_I			0xffffdfff
+#define GPIO_DAT_PIN			0x00001000
+#define GPIO_DAT_PIN_I			0xffffefff
+#define GPIO_CLKDAT_PIN_I		0xffffcfff
+
+#define SET_GPIO_CLK_0			out32(GPIO0_OR, in32(GPIO0_OR) & GPIO_CLK_PIN_I);
+#define SET_GPIO_CLK_1			out32(GPIO0_OR, in32(GPIO0_OR) | GPIO_CLK_PIN);
+#define SET_GPIO_DAT_0			out32(GPIO0_OR, in32(GPIO0_OR) & GPIO_DAT_PIN_I);
+#define SET_GPIO_DAT_1			out32(GPIO0_OR, in32(GPIO0_OR) | GPIO_DAT_PIN);
+
+#define	SET_GPIO_0(bit) SET_GPIO_REG_0(GPIO0_OR, bit)
+#define	SET_GPIO_1(bit) SET_GPIO_REG_1(GPIO0_OR, bit)
+
+#define SET_GPIO_CLK_0_Z1		out32(GPIO0_OR, (in32(GPIO0_OR) & GPIO_CLK_PIN_I) | GPIO_DAT_PIN);
+#define SET_GPIO_CLK_0_Z0		out32(GPIO0_OR, in32(GPIO0_OR) & GPIO_CLKDAT_PIN_I);
+
+#define FPGA_WRITE_1 { \
+			SET_GPIO_CLK_0_Z1\
+			SET_GPIO_CLK_1}
+
+#define FPGA_WRITE_0 { \
+			SET_GPIO_CLK_0_Z0\
+			SET_GPIO_CLK_1}
+
+#define P_GP(reg) (reg & 0x00023f00)
+
+/* Plattforminitializations */
+/* Here we have to set the FPGA Chain */
+/* PROGRAM_PROG_EN	= HIGH */
+/* PROGRAM_SEL_DPR	= LOW */
+int fpga_pre_fn (int cookie)
+{
+	unsigned long	reg;
+
+	reg = in32(GPIO0_IR);
+	/* Enable the FPGA Chain */
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_PROG_EN);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_PROG_EN);
+	SET_GPIO_1(CFG_GPIO_PROG_EN);
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_SEL_DPR);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_SEL_DPR);
+	SET_GPIO_0((CFG_GPIO_SEL_DPR));
+
+	/* initialize the GPIO Pins */	
+	/* output */
+	SET_GPIO_0(CFG_GPIO_CLK);
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_CLK);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_CLK);
+
+	/* output */
+	SET_GPIO_0(CFG_GPIO_DATA);
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_DATA);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_DATA);
+
+	/* First we set STATUS to 0 then as an input */
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_STATUS);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_STATUS);
+	SET_GPIO_0(CFG_GPIO_STATUS);
+	SET_GPIO_REG_0(GPIO0_TCR, CFG_GPIO_STATUS);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_STATUS);
+
+	/* output */
+	SET_GPIO_REG_1(GPIO0_TCR, CFG_GPIO_CONFIG);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_CONFIG);
+	SET_GPIO_0(CFG_GPIO_CONFIG);
+
+	/* input */
+	SET_GPIO_0(CFG_GPIO_CON_DON);
+	SET_GPIO_REG_0(GPIO0_TCR, CFG_GPIO_CON_DON);
+	SET_GPIO_REG_0(GPIO0_ODR, CFG_GPIO_CON_DON);
+
+	/* CONFIG = 0 STATUS = 0 -> FPGA in reset state */
+	SET_GPIO_0(CFG_GPIO_CONFIG);
+	return FPGA_SUCCESS;
+}
+
+/* Set the state of CONFIG Pin */
+int fpga_config_fn (int assert_config, int flush, int cookie)
+{
+	if (assert_config) {
+		SET_GPIO_1(CFG_GPIO_CONFIG);
+	} else {
+		SET_GPIO_0(CFG_GPIO_CONFIG);
+	}
+	return FPGA_SUCCESS;
+}
+
+/* Returns the state of STATUS Pin */
+int fpga_status_fn (int cookie)
+{
+	unsigned long	reg;
+
+	reg = in32(GPIO0_IR);
+	if (reg &= (0x80000000 >> CFG_GPIO_STATUS)) {
+		PRINTF("STATUS = HIGH\n");
+		return FPGA_FAIL;
+	}
+	PRINTF("STATUS = LOW\n");
+	return FPGA_SUCCESS;
+}
+
+/* Returns the state of CONF_DONE Pin */
+int fpga_done_fn (int cookie)
+{
+	unsigned long	reg;
+	reg = in32(GPIO0_IR);
+	if (reg &= (0x80000000 >> CFG_GPIO_CON_DON)) {
+		PRINTF("CONF_DON = HIGH\n");
+		return FPGA_FAIL;
+	}
+	PRINTF("CONF_DON = LOW\n");
+	return FPGA_SUCCESS;
+}
+
+/* writes the complete buffer to the FPGA
+   writing the complete buffer in one function is very faster,
+   then calling it for every bit */
+int fpga_write_fn (void *buf, size_t len, int flush, int cookie)
+{
+	size_t bytecount = 0;
+	unsigned char *data = (unsigned char *) buf;
+	unsigned char val=0;
+	int		i;
+
+	while (bytecount < len) {
+#ifdef CFG_FPGA_CHECK_CTRLC
+		if (ctrlc ()) {
+			return FPGA_FAIL;
+		}
+#endif
+		val = data[bytecount ++ ];
+		i = 8;
+		do {
+			if (val & 0x01) {
+				FPGA_WRITE_1;
+			} else {
+				FPGA_WRITE_0;
+			}
+			val >>= 1;
+			i --;
+		} while (i > 0);
+
+#ifdef CFG_FPGA_PROG_FEEDBACK
+		if (bytecount % (len / 40) == 0)
+			putc ('.');		/* let them know we are alive */
+#endif
+	}
+	return FPGA_SUCCESS;
+}
+
+/* called, when programming is aborted */
+int fpga_abort_fn (int cookie)
+{
+	SET_GPIO_1((CFG_GPIO_SEL_DPR));
+	return FPGA_SUCCESS;
+}
+
+/* called, when programming was succesful */
+int fpga_post_fn (int cookie)
+{
+	return fpga_abort_fn (cookie);
+}
+
+/* Note that these are pointers to code that is in Flash.  They will be
+ * relocated at runtime.
+ */
+Altera_CYC2_Passive_Serial_fns fpga_fns = {
+	fpga_pre_fn,
+	fpga_config_fn,
+	fpga_status_fn,
+	fpga_done_fn,
+	fpga_write_fn,
+	fpga_abort_fn,
+	fpga_post_fn
+};
+
+Altera_desc fpga[CONFIG_FPGA_COUNT] = {
+	{Altera_CYC2,
+	 passive_serial,
+	 Altera_EP2C35_SIZE,
+	 (void *) &fpga_fns,
+	 NULL,
+	 0}
+};
+
+/*
+ * Initialize the fpga.  Return 1 on success, 0 on failure.
+ */
+int alpr_fpga_init (void)
+{
+	int i;
+
+	PRINTF ("%s:%d: Initialize FPGA interface (relocation offset = 0x%.8lx)\n", __FUNCTION__, __LINE__, gd->reloc_off);
+	fpga_init (gd->reloc_off);
+
+	for (i = 0; i < CONFIG_FPGA_COUNT; i++) {
+		PRINTF ("%s:%d: Adding fpga %d\n", __FUNCTION__, __LINE__, i);
+		fpga_add (fpga_altera, &fpga[i]);
+	}
+	return 1;
+}
+
+#endif