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-rw-r--r--board/mvblm7/fpga.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/board/mvblm7/fpga.c b/board/mvblm7/fpga.c
new file mode 100644
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--- /dev/null
+++ b/board/mvblm7/fpga.c
@@ -0,0 +1,188 @@
+/*
+ * (C) Copyright 2002
+ * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
+ * Keith Outwater, keith_outwater@mvis.com.
+ *
+ * (C) Copyright 2008
+ * Andre Schwarz, Matrix Vision GmbH, andre.schwarz@matrix-vision.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
+ *
+ */
+
+#include <common.h>
+#include <ACEX1K.h>
+#include <command.h>
+#include "fpga.h"
+#include "mvblm7.h"
+
+#ifdef FPGA_DEBUG
+#define fpga_debug(fmt, args...) printf("%s: "fmt, __func__, ##args)
+#else
+#define fpga_debug(fmt, args...)
+#endif
+
+Altera_CYC2_Passive_Serial_fns altera_fns = {
+ fpga_null_fn,
+ fpga_config_fn,
+ fpga_status_fn,
+ fpga_done_fn,
+ fpga_wr_fn,
+ fpga_null_fn,
+ fpga_null_fn,
+ 0
+};
+
+Altera_desc cyclone2 = {
+ Altera_CYC2,
+ passive_serial,
+ Altera_EP2C20_SIZE,
+ (void *) &altera_fns,
+ NULL,
+ 0
+};
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int mvblm7_init_fpga(void)
+{
+ fpga_debug("Initialize FPGA interface (reloc 0x%.8lx)\n",
+ gd->reloc_off);
+ fpga_init(gd->reloc_off);
+ fpga_add(fpga_altera, &cyclone2);
+ fpga_config_fn(0, 1, 0);
+ udelay(60);
+
+ return 1;
+}
+
+int fpga_null_fn(int cookie)
+{
+ return 0;
+}
+
+int fpga_config_fn(int assert, int flush, int cookie)
+{
+ volatile immap_t *im = (volatile immap_t *)CFG_IMMR;
+ volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0];
+ u32 dvo = gpio->dat;
+
+ fpga_debug("SET config : %s\n", assert ? "low" : "high");
+ if (assert)
+ dvo |= FPGA_CONFIG;
+ else
+ dvo &= ~FPGA_CONFIG;
+
+ if (flush)
+ gpio->dat = dvo;
+
+ return assert;
+}
+
+int fpga_done_fn(int cookie)
+{
+ volatile immap_t *im = (volatile immap_t *)CFG_IMMR;
+ volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0];
+ int result = 0;
+
+ udelay(10);
+ fpga_debug("CONF_DONE check ... ");
+ if (gpio->dat & FPGA_CONF_DONE) {
+ fpga_debug("high\n");
+ result = 1;
+ } else
+ fpga_debug("low\n");
+
+ return result;
+}
+
+int fpga_status_fn(int cookie)
+{
+ volatile immap_t *im = (volatile immap_t *)CFG_IMMR;
+ volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0];
+ int result = 0;
+
+ fpga_debug("STATUS check ... ");
+ if (gpio->dat & FPGA_STATUS) {
+ fpga_debug("high\n");
+ result = 1;
+ } else
+ fpga_debug("low\n");
+
+ return result;
+}
+
+int fpga_clk_fn(int assert_clk, int flush, int cookie)
+{
+ volatile immap_t *im = (volatile immap_t *)CFG_IMMR;
+ volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0];
+ u32 dvo = gpio->dat;
+
+ fpga_debug("CLOCK %s\n", assert_clk ? "high" : "low");
+ if (assert_clk)
+ dvo |= FPGA_CCLK;
+ else
+ dvo &= ~FPGA_CCLK;
+
+ if (flush)
+ gpio->dat = dvo;
+
+ return assert_clk;
+}
+
+static inline int _write_fpga(u8 val, int dump)
+{
+ volatile immap_t *im = (volatile immap_t *)CFG_IMMR;
+ volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0];
+ int i;
+ u32 dvo = gpio->dat;
+
+ if (dump)
+ fpga_debug(" %02x -> ", val);
+ for (i = 0; i < 8; i++) {
+ dvo &= ~FPGA_CCLK;
+ gpio->dat = dvo;
+ dvo &= ~FPGA_DIN;
+ if (dump)
+ fpga_debug("%d ", val&1);
+ if (val & 1)
+ dvo |= FPGA_DIN;
+ gpio->dat = dvo;
+ dvo |= FPGA_CCLK;
+ gpio->dat = dvo;
+ val >>= 1;
+ }
+ if (dump)
+ fpga_debug("\n");
+
+ return 0;
+}
+
+int fpga_wr_fn(void *buf, size_t len, int flush, int cookie)
+{
+ unsigned char *data = (unsigned char *) buf;
+ int i;
+
+ fpga_debug("fpga_wr: buf %p / size %d\n", buf, len);
+ for (i = 0; i < len; i++)
+ _write_fpga(data[i], 0);
+ fpga_debug("\n");
+
+ return FPGA_SUCCESS;
+}