Add console command to access io space registers

Provide u-boot console functions to access IO space registers. A no
thrills implementation, accessing one register at a time.

For example:
    boot > iod 80
    0080: 00000094
    boot > iod.w 80
    0080: 0094
    boot > iod.b 80
    0080: 94
    boot > iow.b 0x80 12
    boot > iod 0x80
    0080: 00000012

Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/common/Makefile b/common/Makefile
index ebb7635..083df17 100644 (file)
--- a/common/Makefile
+++ b/common/Makefile
@@ -120,6 +120,7 @@ COBJS-$(CONFIG_LOGBUFFER) += cmd_log.o
 COBJS-$(CONFIG_ID_EEPROM) += cmd_mac.o
 COBJS-$(CONFIG_CMD_MD5SUM) += cmd_md5sum.o
 COBJS-$(CONFIG_CMD_MEMORY) += cmd_mem.o
+COBJS-$(CONFIG_CMD_IO) += cmd_io.o
 COBJS-$(CONFIG_CMD_MFSL) += cmd_mfsl.o
 COBJS-$(CONFIG_MII) += miiphyutil.o
 COBJS-$(CONFIG_CMD_MII) += miiphyutil.o

diff --git a/common/cmd_io.c b/common/cmd_io.c
new file mode 100644 (file)
index 0000000..6450cb5
--- /dev/null
+++ b/common/cmd_io.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ *
+ * 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
+ */
+
+/*
+ * IO space access commands.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+
+/*
+ * IO Display
+ *
+ * Syntax:
+ *     iod{.b, .w, .l} {addr}
+ */
+int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+       ulong addr;
+       int size;
+
+       if (argc != 2)
+               return CMD_RET_USAGE;
+
+       size = cmd_get_data_size(argv[0], 4);
+       if (size < 0)
+               return 1;
+
+       addr = simple_strtoul(argv[1], NULL, 16);
+
+       printf("%04x: ", (u16) addr);
+
+       if (size == 4)
+               printf("%08x\n", inl(addr));
+       else if (size == 2)
+               printf("%04x\n", inw(addr));
+       else
+               printf("%02x\n", inb(addr));
+
+       return 0;
+}
+
+int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+       ulong addr, size, val;
+
+       if (argc != 3)
+               return CMD_RET_USAGE;
+
+       size = cmd_get_data_size(argv[0], 4);
+       if (size < 0)
+               return 1;
+
+       addr = simple_strtoul(argv[1], NULL, 16);
+       val = simple_strtoul(argv[2], NULL, 16);
+
+       if (size == 4)
+               outl((u32) val, addr);
+       else if (size == 2)
+               outw((u16) val, addr);
+       else
+               outb((u8) val, addr);
+
+       return 0;
+}
+
+/**************************************************/
+U_BOOT_CMD(iod, 2, 0, do_io_iod,
+          "IO space display", "[.b, .w, .l] address [# of objects]");
+
+U_BOOT_CMD(iow, 3, 0, do_io_iow,
+          "IO space modify (auto-incrementing address)",
+          "[.b, .w, .l] address");

diff --git a/include/command.h b/include/command.h
index 10bc260..476e7cf 100644 (file)
--- a/include/command.h
+++ b/include/command.h
@@ -89,10 +89,10 @@ extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *
  */
 
 #if defined(CONFIG_CMD_MEMORY)         \
-    || defined(CONFIG_CMD_I2C)         \
-    || defined(CONFIG_CMD_ITEST)       \
-    || defined(CONFIG_CMD_PCI)         \
-    || defined(CONFIG_CMD_PORTIO)
+       || defined(CONFIG_CMD_I2C)      \
+       || defined(CONFIG_CMD_ITEST)    \
+       || defined(CONFIG_CMD_PCI)      \
+       || defined(CONFIG_CMD_PORTIO)
 #define CMD_DATA_SIZE
 extern int cmd_get_data_size(char* arg, int default_size);
 #endif

diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h
index 124d51f..e82f642 100644 (file)
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -48,6 +48,7 @@
 #define CONFIG_CMD_IMI         /* iminfo                       */
 #define CONFIG_CMD_IMLS                /* List all found images        */
 #define CONFIG_CMD_IMMAP       /* IMMR dump support            */
+#define CONFIG_CMD_IO          /* Access to X86 IO space       */
 #define CONFIG_CMD_IRQ         /* irqinfo                      */
 #define CONFIG_CMD_ITEST       /* Integer (and string) test    */
 #define CONFIG_CMD_JFFS2       /* JFFS2 Support                */