[PATCH 2/3] FPGA: add a programming command

[Juergen Beisert]

This command is a simple frontend to the FPGA programming handler manager.

Signed-off-by: Juergen Beisert <jbe at pengutronix.de>
---
 commands/Kconfig    |  10 +++++
 commands/Makefile   |   1 +
 commands/fpgaload.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 128 insertions(+)
 create mode 100644 commands/fpgaload.c

diff --git a/commands/Kconfig b/commands/Kconfig
index 9738ec4..bb4ccaf 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -605,6 +605,16 @@ config CMD_BAREBOX_UPDATE
 	select BAREBOX_UPDATE
 	prompt "barebox-update"
 
+config CMD_FPGALOAD
+	bool
+	select FPGAMANAGER
+	prompt "fpgaload"
+	help
+	  Provides the "fpgaload" command which deals with FPGA firmware to
+	  download it into an FPGA device. This command uses the FPGA manager
+	  framework to hide the details about how program a specific FPGA
+	  device.
+
 config CMD_TIMEOUT
 	tristate
 	prompt "timeout"
diff --git a/commands/Makefile b/commands/Makefile
index 58d27fa..864ca0c 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -93,3 +93,4 @@ obj-$(CONFIG_CMD_MIITOOL)	+= miitool.o
 obj-$(CONFIG_CMD_DETECT)	+= detect.o
 obj-$(CONFIG_CMD_BOOT)		+= boot.o
 obj-$(CONFIG_CMD_DEVINFO)	+= devinfo.o
+obj-$(CONFIG_CMD_FPGALOAD)	+= fpgaload.o
diff --git a/commands/fpgaload.c b/commands/fpgaload.c
new file mode 100644
index 0000000..677ff73
--- /dev/null
+++ b/commands/fpgaload.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2013 Juergen Beisert <kernel at pengutronix.de>, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <getopt.h>
+#include <fpgamgr.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <linux/stat.h>
+
+static int fpgaload_write_data(struct fpga_mgr *mgr, const char *firmware)
+{
+	int fd, ret;
+	struct stat s;
+	size_t sz;
+	unsigned char buffer[256]; /* must always be a multiple of 8 bytes! */
+
+	ret = stat(firmware, &s);
+	if (ret != 0) {
+		printf("Unable to access file '%s'\n", firmware);
+		return -EINVAL;
+	}
+
+	fd = open(firmware, O_RDONLY);
+	if (fd < 0)
+		return fd;
+
+	do {
+		sz = read(fd, buffer, sizeof(buffer));
+		if (sz == 0)
+			break;
+		ret = fpgamgr_prog_fpga(mgr, buffer, sz);
+		if (ret < 0)
+			break;
+	} while (1);
+
+	close(fd);
+	return 0;
+}
+
+static int do_fpgaload(int argc, char *argv[])
+{
+	int ret, opt, index = -1;
+	const char *name = NULL, *firmware;
+	struct fpga_mgr *mgr;
+
+	while ((opt = getopt(argc, argv, "t:i:l")) > 0) {
+		switch (opt) {
+		case 't':
+			name = optarg;
+			break;
+		case 'i':
+			index = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'l':
+			printf("registered programming handlers:\n");
+			fpgamgr_handlers_list();
+			return 0;
+		default:
+			return COMMAND_ERROR_USAGE;
+		}
+	}
+
+	if (!(argc - optind))
+		return COMMAND_ERROR_USAGE;
+
+	firmware = argv[optind];
+
+	mgr = fpgamgr_find_handler(name, index);
+	if (mgr == NULL) {
+		printf("No such programming handler found\n");
+		return 1;
+	}
+
+	ret = fpgamgr_open_fpga(mgr);
+	if (ret == -ENOSYS) {
+		/* this might be a bug... */
+		pr_debug("No programming initiater function defined\n");
+	}
+
+	ret = fpgaload_write_data(mgr, firmware);
+	if (ret != 0)
+		return 1;
+
+	ret = fpgamgr_close_fpga(mgr);
+	if (ret == -ENOSYS) {
+		/* this might be a bug... */
+		pr_debug("No programming finisher function defined\n");
+	}
+
+	return 0;
+}
+
+BAREBOX_CMD_HELP_START(fpgaload)
+BAREBOX_CMD_HELP_USAGE("fpgaload [OPTIONS] <firmware>\n")
+BAREBOX_CMD_HELP_SHORT("Program a firmware file content into an FPGA\n")
+BAREBOX_CMD_HELP_OPT("-t <target>", "define the FPGA handler by name\n")
+BAREBOX_CMD_HELP_OPT("-i <index>", "define the FPGA handler by index\n")
+BAREBOX_CMD_HELP_OPT("-l\t", "list registered FPGAs\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(fpgaload)
+	.cmd = do_fpgaload,
+	.usage = "program an FPGA",
+	BAREBOX_CMD_HELP(cmd_fpgaload_help)
+BAREBOX_CMD_END
-- 
1.8.4.rc3