From: Vadim Bendebury vbendeb@chromium.org
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 --- Changes in v3: None Changes in v2: None
common/Makefile | 1 + common/cmd_io.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++ include/command.h | 8 ++-- include/config_cmd_all.h | 1 + 4 files changed, 99 insertions(+), 4 deletions(-) create mode 100644 common/cmd_io.c
diff --git a/common/Makefile b/common/Makefile index dcab027..1c5d623 100644 --- 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 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 --- 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 --- 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 */