[u-boot.git] / cmd / io.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2012 The Chromium OS Authors.
 */

/*
 * IO space access commands.
 */

#include <command.h>
#include <display_options.h>
#include <vsprintf.h>
#include <asm/io.h>

/* Display values from last command */
static ulong last_addr, last_size;
static ulong last_length = 0x40;
static ulong base_address;

#define DISP_LINE_LEN	16

/*
 * IO Display
 *
 * Syntax:
 *	iod{.b, .w, .l} {addr}
 */
int do_io_iod(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
	ulong addr, length, bytes;
	u8 buf[DISP_LINE_LEN];
	int size, todo;

	/*
	 * We use the last specified parameters, unless new ones are
	 * entered.
	 */
	addr = last_addr;
	size = last_size;
	length = last_length;

	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], 4);
		if (size < 0)
			return 1;

		/* Address is specified since argc > 1 */
		addr = hextoul(argv[1], NULL);
		addr += base_address;

		/*
		 * If another parameter, it is the length to display.
		 * Length is the number of objects, not number of bytes.
		 */
		if (argc > 2)
			length = hextoul(argv[2], NULL);
	}

	bytes = size * length;

	/* Print the lines */
	for (; bytes > 0; addr += todo) {
		u8 *ptr = buf;
		int i;

		todo = min(bytes, (ulong)DISP_LINE_LEN);
		for (i = 0; i < todo; i += size, ptr += size) {
			if (size == 4)
				*(u32 *)ptr = inl(addr + i);
			else if (size == 2)
				*(u16 *)ptr = inw(addr + i);
			else
				*ptr = inb(addr + i);
		}
		print_buffer(addr, buf, size, todo / size,
			     DISP_LINE_LEN / size);
		bytes -= todo;
	}

	last_addr = addr;
	last_length = length;
	last_size = size;

	return 0;
}

int do_io_iow(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
	ulong addr, val;
	int size;

	if (argc != 3)
		return CMD_RET_USAGE;

	size = cmd_get_data_size(argv[0], 4);
	if (size < 0)
		return 1;

	addr = hextoul(argv[1], NULL);
	val = hextoul(argv[2], NULL);

	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, 3, 1, do_io_iod,
	   "IO space display", "[.b, .w, .l] address");

U_BOOT_CMD(iow, 3, 0, do_io_iow,
	   "IO space modify",
	   "[.b, .w, .l] address value");
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
9ad557be VB	2	/*
9ad557be VB	3	* Copyright (c) 2012 The Chromium OS Authors.
9ad557be VB	4	*/
	5
	6	/*
	7	* IO space access commands.
	8	*/
	9
9ad557be	10	#include <command.h>
4e4bf944	11	#include <display_options.h>
301bac60	12	#include <vsprintf.h>
9ad557be VB	13	#include <asm/io.h>
9ad557be VB	14
9da3776b SG	15	/* Display values from last command */
	16	static ulong last_addr, last_size;
	17	static ulong last_length = 0x40;
	18	static ulong base_address;
	19
	20	#define DISP_LINE_LEN 16
	21
9ad557be VB	22	/*
	23	* IO Display
	24	*
	25	* Syntax:
	26	* iod{.b, .w, .l} {addr}
	27	*/
09140113	28	int do_io_iod(struct cmd_tbl cmdtp, int flag, int argc, char const argv[])
9ad557be	29	{
9da3776b SG	30	ulong addr, length, bytes;
	31	u8 buf[DISP_LINE_LEN];
	32	int size, todo;
	33
	34	/*
	35	* We use the last specified parameters, unless new ones are
	36	* entered.
	37	*/
	38	addr = last_addr;
	39	size = last_size;
	40	length = last_length;
	41
	42	if (argc < 2)
9ad557be VB	43	return CMD_RET_USAGE;
9ad557be VB	44
9da3776b SG	45	if ((flag & CMD_FLAG_REPEAT) == 0) {
	46	/*
	47	* New command specified. Check for a size specification.
	48	* Defaults to long if no or incorrect specification.
	49	*/
	50	size = cmd_get_data_size(argv[0], 4);
	51	if (size < 0)
	52	return 1;
	53
	54	/* Address is specified since argc > 1 */
7e5f460e	55	addr = hextoul(argv[1], NULL);
9da3776b SG	56	addr += base_address;
	57
	58	/*
	59	* If another parameter, it is the length to display.
	60	* Length is the number of objects, not number of bytes.
	61	*/
	62	if (argc > 2)
7e5f460e	63	length = hextoul(argv[2], NULL);
9da3776b SG	64	}
	65
	66	bytes = size * length;
	67
	68	/* Print the lines */
	69	for (; bytes > 0; addr += todo) {
	70	u8 *ptr = buf;
	71	int i;
	72
	73	todo = min(bytes, (ulong)DISP_LINE_LEN);
	74	for (i = 0; i < todo; i += size, ptr += size) {
	75	if (size == 4)
	76	(u32 )ptr = inl(addr + i);
	77	else if (size == 2)
	78	(u16 )ptr = inw(addr + i);
	79	else
	80	*ptr = inb(addr + i);
	81	}
	82	print_buffer(addr, buf, size, todo / size,
	83	DISP_LINE_LEN / size);
	84	bytes -= todo;
	85	}
	86
	87	last_addr = addr;
	88	last_length = length;
	89	last_size = size;
9ad557be VB	90
	91	return 0;
	92	}
	93
09140113	94	int do_io_iow(struct cmd_tbl cmdtp, int flag, int argc, char const argv[])
9ad557be	95	{
9398b8ce TR	96	ulong addr, val;
9398b8ce TR	97	int size;
9ad557be VB	98
	99	if (argc != 3)
	100	return CMD_RET_USAGE;
	101
	102	size = cmd_get_data_size(argv[0], 4);
	103	if (size < 0)
	104	return 1;
	105
7e5f460e SG	106	addr = hextoul(argv[1], NULL);
7e5f460e SG	107	val = hextoul(argv[2], NULL);
9ad557be VB	108
	109	if (size == 4)
	110	outl((u32) val, addr);
	111	else if (size == 2)
	112	outw((u16) val, addr);
	113	else
	114	outb((u8) val, addr);
	115
	116	return 0;
	117	}
	118
	119	/**************************************************/
9da3776b	120	U_BOOT_CMD(iod, 3, 1, do_io_iod,
d641819c	121	"IO space display", "[.b, .w, .l] address");
9ad557be VB	122
9ad557be VB	123	U_BOOT_CMD(iow, 3, 0, do_io_iow,
d641819c BM	124	"IO space modify",
d641819c BM	125	"[.b, .w, .l] address value");