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https://github.com/brain-hackers/u-boot-brain
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4c12eeb8b5
Change all files in common/ to use CMD_RET_USAGE instead of calling cmd_usage() directly. I'm not completely sure about this patch since the code since impact is small (100 byte or so on ARM) and it might need splitting into smaller patches. But for now here it is. Signed-off-by: Simon Glass <sjg@chromium.org>
162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
/*
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* (C) Copyright 2003
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* Marc Singer, elf@buici.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Port I/O Functions
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*
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* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
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*/
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#include <common.h>
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#include <command.h>
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/* Display values from last command.
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* Memory modify remembered values are different from display memory.
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*/
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static uint in_last_addr, in_last_size;
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static uint out_last_addr, out_last_size, out_last_value;
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int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
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{
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uint addr = out_last_addr;
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uint size = out_last_size;
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uint value = out_last_value;
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if (argc != 3)
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return CMD_RET_USAGE;
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if ((flag & CMD_FLAG_REPEAT) == 0) {
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/*
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* New command specified. Check for a size specification.
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* Defaults to long if no or incorrect specification.
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*/
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size = cmd_get_data_size (argv[0], 1);
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addr = simple_strtoul (argv[1], NULL, 16);
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value = simple_strtoul (argv[2], NULL, 16);
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}
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#if defined (CONFIG_X86)
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{
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unsigned short port = addr;
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switch (size) {
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default:
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case 1:
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{
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unsigned char ch = value;
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__asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
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}
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break;
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case 2:
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{
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unsigned short w = value;
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__asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
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}
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break;
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case 4:
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__asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
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break;
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}
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}
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#endif /* CONFIG_X86 */
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out_last_addr = addr;
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out_last_size = size;
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out_last_value = value;
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return 0;
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}
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U_BOOT_CMD(
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out, 3, 1, do_portio_out,
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"write datum to IO port",
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"[.b, .w, .l] port value\n - output to IO port"
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);
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int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
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{
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uint addr = in_last_addr;
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uint size = in_last_size;
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if (argc != 2)
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return CMD_RET_USAGE;
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if ((flag & CMD_FLAG_REPEAT) == 0) {
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/*
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* New command specified. Check for a size specification.
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* Defaults to long if no or incorrect specification.
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*/
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size = cmd_get_data_size (argv[0], 1);
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addr = simple_strtoul (argv[1], NULL, 16);
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}
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#if defined (CONFIG_X86)
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{
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unsigned short port = addr;
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switch (size) {
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default:
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case 1:
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{
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unsigned char ch;
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__asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
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printf (" %02x\n", ch);
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}
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break;
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case 2:
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{
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unsigned short w;
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__asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
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printf (" %04x\n", w);
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}
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break;
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case 4:
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{
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unsigned long l;
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__asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
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printf (" %08lx\n", l);
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}
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break;
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}
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}
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#endif /* CONFIG_X86 */
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in_last_addr = addr;
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in_last_size = size;
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return 0;
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}
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U_BOOT_CMD(
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in, 2, 1, do_portio_in,
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"read data from an IO port",
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"[.b, .w, .l] port\n"
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" - read datum from IO port"
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);
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