1 files changed, 157 insertions, 0 deletions
diff --git a/common/cmd_portio.c b/common/cmd_portio.c
new file mode 100644
index 0000000..afa39e1
--- /dev/null
+++ b/common/cmd_portio.c
@@ -0,0 +1,157 @@
+/*
+ * (C) Copyright 2003
+ * Marc Singer, elf@buici.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
+ */
+
+/*
+ * Port I/O Functions
+ *
+ * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cmd_portio.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_PORTIO)
+
+extern int cmd_get_data_size (char *arg, int default_size);
+
+/* Display values from last command.
+ * Memory modify remembered values are different from display memory.
+ */
+static uint in_last_addr, in_last_size;
+static uint out_last_addr, out_last_size, out_last_value;
+
+
+int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	uint addr = out_last_addr;
+	uint size = out_last_size;
+	uint value = out_last_value;
+
+	if (argc != 3) {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if ((flag & CMD_FLAG_REPEAT) == 0) {
+		/* New command specified.  Check for a size specification.
+		 * Defaults to long if no or incorrect specification.
+		 */
+		size = cmd_get_data_size (argv[0], 1);
+		addr = simple_strtoul (argv[1], NULL, 16);
+		value = simple_strtoul (argv[2], NULL, 16);
+	}
+#if defined (CONFIG_X86)
+
+	{
+		unsigned short port = addr;
+
+		switch (size) {
+		default:
+		case 1:
+		    {
+			unsigned char ch = value;
+			__asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
+		    }
+			break;
+		case 2:
+		    {
+			unsigned short w = value;
+			__asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
+		    }
+			break;
+		case 4:
+			__asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
+
+			break;
+		}
+	}
+
+#endif							/* CONFIG_X86 */
+
+	out_last_addr = addr;
+	out_last_size = size;
+	out_last_value = value;
+
+	return 0;
+}
+
+int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	uint addr = in_last_addr;
+	uint size = in_last_size;
+
+	if (argc != 2) {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if ((flag & CMD_FLAG_REPEAT) == 0) {
+		/* New command specified.  Check for a size specification.
+		 * Defaults to long if no or incorrect specification.
+		 */
+		size = cmd_get_data_size (argv[0], 1);
+		addr = simple_strtoul (argv[1], NULL, 16);
+	}
+#if defined (CONFIG_X86)
+
+	{
+		unsigned short port = addr;
+
+		switch (size) {
+		default:
+		case 1:
+		    {
+			unsigned char ch;
+			__asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
+
+			printf (" %02x\n", ch);
+		    }
+			break;
+		case 2:
+		    {
+			unsigned short w;
+			__asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
+
+			printf (" %04x\n", w);
+		    }
+			break;
+		case 4:
+		    {
+			unsigned long l;
+			__asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
+
+			printf (" %08lx\n", l);
+		    }
+			break;
+		}
+	}
+#endif	/* CONFIG_X86 */
+
+	in_last_addr = addr;
+	in_last_size = size;
+
+	return 0;
+}
+
+#endif	/* CFG_CMD_PORTIO */