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-rw-r--r--post/board/lwmon5/fpga.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/post/board/lwmon5/fpga.c b/post/board/lwmon5/fpga.c
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+/*
+ * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
+ *
+ * Developed for DENX Software Engineering GmbH
+ *
+ * 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>
+
+#ifdef CONFIG_POST
+
+/* This test performs testing of FPGA SCRATCH register,
+ * gets FPGA version and run get_ram_size() on FPGA memory
+ */
+
+#include <post.h>
+
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define FPGA_SCRATCH_REG 0xC4000050
+#define FPGA_VERSION_REG 0xC4000040
+#define FPGA_RAM_START 0xC4200000
+#define FPGA_RAM_END 0xC4203FFF
+
+#define FPGA_PWM_CTRL_REG 0xC4000020
+#define FPGA_PWM_TV_REG 0xC4000024
+
+/* Turn on backlight, set brightness */
+void fpga_backlight_enable(int pwm)
+{
+ out_be16((void *)FPGA_PWM_CTRL_REG, 0x0701);
+ out_be16((void *)FPGA_PWM_TV_REG, pwm);
+}
+
+#if CONFIG_POST & CFG_POST_BSPEC3
+
+static int one_scratch_test(uint value)
+{
+ uint read_value;
+ int ret = 0;
+
+ out_be32((void *)FPGA_SCRATCH_REG, value);
+ /* read other location (protect against data lines capacity) */
+ ret = in_be16((void *)FPGA_VERSION_REG);
+ /* verify test pattern */
+ read_value = in_be32((void *)FPGA_SCRATCH_REG);
+ if (read_value != value) {
+ post_log("FPGA SCRATCH test failed write %08X, read %08X\n",
+ value, read_value);
+ ret = 1;
+ }
+
+ return ret;
+}
+
+/* Verify FPGA, get version & memory size */
+int fpga_post_test(int flags)
+{
+ uint old_value;
+ ushort version;
+ uint read_value;
+ int ret = 0;
+
+ post_log("\n");
+ old_value = in_be32((void *)FPGA_SCRATCH_REG);
+
+ if (one_scratch_test(0x55555555))
+ ret = 1;
+ if (one_scratch_test(0xAAAAAAAA))
+ ret = 1;
+
+ out_be32((void *)FPGA_SCRATCH_REG, old_value);
+
+ version = in_be16((void *)FPGA_VERSION_REG);
+ post_log("FPGA : version %u.%u\n",
+ (version >> 8) & 0xFF, version & 0xFF);
+
+ read_value = get_ram_size((void *)CFG_FPGA_BASE_1, 0x4000);
+ post_log("FPGA RAM size: %d bytes\n", read_value);
+
+ return ret;
+}
+
+#endif /* CONFIG_POST & CFG_POST_BSPEC3 */
+#endif /* CONFIG_POST */
+