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

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

/*
 * IO space access commands.
 */

#include <common.h>
#include <command.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 = simple_strtoul(argv[1], NULL, 16);
		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 = simple_strtoul(argv[2], NULL, 16);
	}

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