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author | Simon Glass <sjg@chromium.org> | 2016-01-18 06:53:51 +0300 |
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committer | Tom Rini <trini@konsulko.com> | 2016-01-25 18:39:43 +0300 |
commit | 72a8cf8dccf6f8b86d1683205e032a94eaa86938 (patch) | |
tree | b29378eb8af182f0faf2028cb52465a021de40cc /cmd/cmd_portio.c | |
parent | 25d5352c71dcc599030a4a764d8087185ed537d3 (diff) | |
download | u-boot-72a8cf8dccf6f8b86d1683205e032a94eaa86938.tar.xz |
Move all command code into its own directory
There are a lot of unrelated files in common, including all of the commands.
Moving them into their own directory makes them easier to find and is more
logical.
Some commands include non-command code, such as cmd_scsi.c. This should be
sorted out at some point so that the function can be enabled with or without
the associated command.
Unfortunately, with m68k I get this error:
m68k: + M5329AFEE
+arch/m68k/cpu/mcf532x/start.o: In function `_start':
+arch/m68k/cpu/mcf532x/start.S:159:(.text+0x452): relocation truncated to fit: R_68K_PC16 against symbol `board_init_f' defined in .text.board_init_f section in common/built-in.o
I hope someone can shed some light on what this means. I hope it isn't
depending on the position of code in the image.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Diffstat (limited to 'cmd/cmd_portio.c')
-rw-r--r-- | cmd/cmd_portio.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/cmd/cmd_portio.c b/cmd/cmd_portio.c new file mode 100644 index 0000000000..bf3a99791c --- /dev/null +++ b/cmd/cmd_portio.c @@ -0,0 +1,145 @@ +/* + * (C) Copyright 2003 + * Marc Singer, elf@buici.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * Port I/O Functions + * + * Copied from FADS ROM, Dan Malek (dmalek@jlc.net) + */ + +#include <common.h> +#include <command.h> + +/* 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 * const argv[]) +{ + uint addr = out_last_addr; + uint size = out_last_size; + uint value = out_last_value; + + if (argc != 3) + return CMD_RET_USAGE; + + 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; +} + +U_BOOT_CMD( + out, 3, 1, do_portio_out, + "write datum to IO port", + "[.b, .w, .l] port value\n - output to IO port" +); + +int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) +{ + uint addr = in_last_addr; + uint size = in_last_size; + + if (argc != 2) + return CMD_RET_USAGE; + + 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; +} + +U_BOOT_CMD( + in, 2, 1, do_portio_in, + "read data from an IO port", + "[.b, .w, .l] port\n" + " - read datum from IO port" +); |