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

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2011 Freescale Semiconductor, Inc
 * Andy Fleming
 */

/*
 * MDIO Commands
 */

#include <command.h>
#include <dm.h>
#include <miiphy.h>
#include <phy.h>

static char last_op[2];
static uint last_data;
static uint last_addr_lo;
static uint last_addr_hi;
static uint last_devad_lo;
static uint last_devad_hi;
static uint last_reg_lo;
static uint last_reg_hi;

static int extract_range(char *input, int *plo, int *phi)
{
	char *end;
	*plo = simple_strtol(input, &end, 16);
	if (end == input)
		return -1;

	if ((*end == '-') && *(++end))
		*phi = simple_strtol(end, NULL, 16);
	else if (*end == '\0')
		*phi = *plo;
	else
		return -1;

	return 0;
}

static int mdio_write_ranges(struct mii_dev *bus,
			     int addrlo,
			     int addrhi, int devadlo, int devadhi,
			     int reglo, int reghi, unsigned short data,
			     int extended)
{
	struct phy_device *phydev;
	int addr, devad, reg;
	int err = 0;

	for (addr = addrlo; addr <= addrhi; addr++) {
		phydev = bus->phymap[addr];

		for (devad = devadlo; devad <= devadhi; devad++) {
			for (reg = reglo; reg <= reghi; reg++) {
				if (!phydev)
					err = bus->write(bus, addr, devad,
							 reg, data);
				else if (!extended)
					err = phy_write_mmd(phydev, devad,
							    reg, data);
				else
					err = phydev->drv->writeext(phydev,
							addr, devad, reg, data);

				if (err)
					goto err_out;
			}
		}
	}

err_out:
	return err;
}

static int mdio_read_ranges(struct mii_dev *bus,
			    int addrlo,
			    int addrhi, int devadlo, int devadhi,
			    int reglo, int reghi, int extended)
{
	int addr, devad, reg;
	struct phy_device *phydev;

	printf("Reading from bus %s\n", bus->name);
	for (addr = addrlo; addr <= addrhi; addr++) {
		phydev = bus->phymap[addr];
		printf("PHY at address %x:\n", addr);

		for (devad = devadlo; devad <= devadhi; devad++) {
			for (reg = reglo; reg <= reghi; reg++) {
				int val;

				if (!phydev)
					val = bus->read(bus, addr, devad, reg);
				else if (!extended)
					val = phy_read_mmd(phydev, devad, reg);
				else
					val = phydev->drv->readext(phydev, addr,
						devad, reg);

				if (val < 0) {
					printf("Error\n");

					return val;
				}

				if (devad >= 0)
					printf("%d.", devad);

				printf("%d - 0x%x\n", reg, val & 0xffff);
			}
		}
	}

	return 0;
}

/* The register will be in the form [a[-b].]x[-y] */
static int extract_reg_range(char *input, int *devadlo, int *devadhi,
			     int *reglo, int *reghi)
{
	char *regstr;

	/* use strrchr to find the last string after a '.' */
	regstr = strrchr(input, '.');

	/* If it exists, extract the devad(s) */
	if (regstr) {
		char devadstr[32];

		strncpy(devadstr, input, regstr - input);
		devadstr[regstr - input] = '\0';

		if (extract_range(devadstr, devadlo, devadhi))
			return -1;

		regstr++;
	} else {
		/* Otherwise, we have no devad, and we just got regs */
		*devadlo = *devadhi = MDIO_DEVAD_NONE;

		regstr = input;
	}

	return extract_range(regstr, reglo, reghi);
}

static int extract_phy_range(char *const argv[], int argc, struct mii_dev **bus,
			     struct phy_device **phydev,
			     int *addrlo, int *addrhi)
{
	struct phy_device *dev = *phydev;

	if ((argc < 1) || (argc > 2))
		return -1;

	/* If there are two arguments, it's busname addr */
	if (argc == 2) {
		*bus = miiphy_get_dev_by_name(argv[0]);

		if (!*bus)
			return -1;

		return extract_range(argv[1], addrlo, addrhi);
	}

	/* It must be one argument, here */

	/*
	 * This argument can be one of two things:
	 * 1) Ethernet device name
	 * 2) Just an address (use the previously-used bus)
	 *
	 * We check all buses for a PHY which is connected to an ethernet
	 * device by the given name.  If none are found, we call
	 * extract_range() on the string, and see if it's an address range.
	 */
	dev = mdio_phydev_for_ethname(argv[0]);

	if (dev) {
		*addrlo = *addrhi = dev->addr;
		*bus = dev->bus;

		return 0;
	}

	/* It's an address or nothing useful */
	return extract_range(argv[0], addrlo, addrhi);
}

/* ---------------------------------------------------------------- */
static int do_mdio(struct cmd_tbl *cmdtp, int flag, int argc,
		   char *const argv[])
{
	char op[2];
	int addrlo, addrhi, reglo, reghi, devadlo, devadhi;
	unsigned short	data;
	int pos = argc - 1;
	struct mii_dev *bus;
	struct phy_device *phydev = NULL;
	int extended = 0;

	if (argc < 2)
		return CMD_RET_USAGE;

#ifdef CONFIG_DM_MDIO
	/* probe DM MII device before any operation so they are all accesible */
	dm_mdio_probe_devices();
#endif

	/*
	 * We use the last specified parameters, unless new ones are
	 * entered.
	 */
	op[0] = argv[1][0];
	addrlo = last_addr_lo;
	addrhi = last_addr_hi;
	devadlo = last_devad_lo;
	devadhi = last_devad_hi;
	reglo  = last_reg_lo;
	reghi  = last_reg_hi;
	data   = last_data;

	bus = mdio_get_current_dev();

	if (flag & CMD_FLAG_REPEAT)
		op[0] = last_op[0];

	if (strlen(argv[1]) > 1) {
		op[1] = argv[1][1];
		if (op[1] == 'x') {
			phydev = mdio_phydev_for_ethname(argv[2]);

			if (phydev) {
				addrlo = phydev->addr;
				addrhi = addrlo;
				bus = phydev->bus;
				extended = 1;
			} else {
				return CMD_RET_FAILURE;
			}

			if (!phydev->drv ||
			    (!phydev->drv->writeext && (op[0] == 'w')) ||
			    (!phydev->drv->readext && (op[0] == 'r'))) {
				puts("PHY does not have extended functions\n");
				return CMD_RET_FAILURE;
			}
		}
	}

	switch (op[0]) {
	case 'w':
		if (pos > 1)
			data = hextoul(argv[pos--], NULL);
		/* Intentional fall-through - Get reg for read and write */
	case 'r':
		if (pos > 1)
			if (extract_reg_range(argv[pos--], &devadlo, &devadhi,
					      &reglo, &reghi))
				return CMD_RET_FAILURE;
		/* Intentional fall-through - Get phy for all commands */
	default:
		if (pos > 1)
			if (extract_phy_range(&argv[2], pos - 1, &bus,
					      &phydev, &addrlo, &addrhi))
				return CMD_RET_FAILURE;

		break;
	}

	if (!bus) {
		puts("No MDIO bus found\n");
		return CMD_RET_FAILURE;
	}

	if (op[0] == 'l') {
		mdio_list_devices();

		return 0;
	}

	/* Save the chosen bus */
	miiphy_set_current_dev(bus->name);

	switch (op[0]) {
	case 'w':
		mdio_write_ranges(bus, addrlo, addrhi, devadlo, devadhi,
				  reglo, reghi, data, extended);
		break;

	case 'r':
		mdio_read_ranges(bus, addrlo, addrhi, devadlo, devadhi,
				 reglo, reghi, extended);
		break;
	}

	/*
	 * Save the parameters for repeats.
	 */
	last_op[0] = op[0];
	last_addr_lo = addrlo;
	last_addr_hi = addrhi;
	last_devad_lo = devadlo;
	last_devad_hi = devadhi;
	last_reg_lo  = reglo;
	last_reg_hi  = reghi;
	last_data    = data;

	return 0;
}

/***************************************************/

U_BOOT_CMD(
	mdio,	6,	1,	do_mdio,
	"MDIO utility commands",
	"list			- List MDIO buses\n"
	"mdio read <phydev> [<devad>.]<reg> - "
		"read PHY's register at <devad>.<reg>\n"
	"mdio write <phydev> [<devad>.]<reg> <data> - "
		"write PHY's register at <devad>.<reg>\n"
	"mdio rx <phydev> [<devad>.]<reg> - "
		"read PHY's extended register at <devad>.<reg>\n"
	"mdio wx <phydev> [<devad>.]<reg> <data> - "
		"write PHY's extended register at <devad>.<reg>\n"
	"<phydev> may be:\n"
	"   <busname>  <addr>\n"
	"   <addr>\n"
	"   <eth name>\n"
	"<addr> <devad>, and <reg> may be ranges, e.g. 1-5.4-0x1f.\n"
);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
995daa0b AF	2	/*
	3	* (C) Copyright 2011 Freescale Semiconductor, Inc
	4	* Andy Fleming
995daa0b AF	5	*/
	6
	7	/*
	8	* MDIO Commands
	9	*/
	10
995daa0b	11	#include <command.h>
2a64ada7	12	#include <dm.h>
995daa0b AF	13	#include <miiphy.h>
	14	#include <phy.h>
	15
995daa0b AF	16	static char last_op[2];
	17	static uint last_data;
	18	static uint last_addr_lo;
	19	static uint last_addr_hi;
	20	static uint last_devad_lo;
	21	static uint last_devad_hi;
	22	static uint last_reg_lo;
	23	static uint last_reg_hi;
	24
	25	static int extract_range(char input, int plo, int *phi)
	26	{
	27	char *end;
15a2acdf	28	*plo = simple_strtol(input, &end, 16);
995daa0b AF	29	if (end == input)
	30	return -1;
	31
	32	if ((end == '-') && (++end))
15a2acdf	33	*phi = simple_strtol(end, NULL, 16);
995daa0b AF	34	else if (*end == '\0')
	35	phi = plo;
	36	else
	37	return -1;
	38
	39	return 0;
	40	}
	41
e55047ec	42	static int mdio_write_ranges(struct mii_dev *bus,
26b807c4	43	int addrlo,
088f1b19	44	int addrhi, int devadlo, int devadhi,
26b807c4 SB	45	int reglo, int reghi, unsigned short data,
26b807c4 SB	46	int extended)
995daa0b	47	{
e55047ec	48	struct phy_device *phydev;
995daa0b AF	49	int addr, devad, reg;
	50	int err = 0;
	51
	52	for (addr = addrlo; addr <= addrhi; addr++) {
e55047ec CC	53	phydev = bus->phymap[addr];
e55047ec CC	54
995daa0b AF	55	for (devad = devadlo; devad <= devadhi; devad++) {
995daa0b AF	56	for (reg = reglo; reg <= reghi; reg++) {
b4c20f20 VO	57	if (!phydev)
	58	err = bus->write(bus, addr, devad,
	59	reg, data);
	60	else if (!extended)
e55047ec CC	61	err = phy_write_mmd(phydev, devad,
e55047ec CC	62	reg, data);
26b807c4 SB	63	else
	64	err = phydev->drv->writeext(phydev,
	65	addr, devad, reg, data);
995daa0b AF	66
	67	if (err)
	68	goto err_out;
	69	}
	70	}
	71	}
	72
	73	err_out:
	74	return err;
	75	}
	76
e55047ec	77	static int mdio_read_ranges(struct mii_dev *bus,
26b807c4	78	int addrlo,
088f1b19	79	int addrhi, int devadlo, int devadhi,
26b807c4	80	int reglo, int reghi, int extended)
995daa0b AF	81	{
995daa0b AF	82	int addr, devad, reg;
e55047ec	83	struct phy_device *phydev;
995daa0b AF	84
	85	printf("Reading from bus %s\n", bus->name);
	86	for (addr = addrlo; addr <= addrhi; addr++) {
e55047ec	87	phydev = bus->phymap[addr];
15a2acdf	88	printf("PHY at address %x:\n", addr);
995daa0b AF	89
	90	for (devad = devadlo; devad <= devadhi; devad++) {
	91	for (reg = reglo; reg <= reghi; reg++) {
a621b167	92	int val;
995daa0b	93
b4c20f20 VO	94	if (!phydev)
	95	val = bus->read(bus, addr, devad, reg);
	96	else if (!extended)
e55047ec	97	val = phy_read_mmd(phydev, devad, reg);
26b807c4 SB	98	else
	99	val = phydev->drv->readext(phydev, addr,
	100	devad, reg);
	101
995daa0b AF	102	if (val < 0) {
	103	printf("Error\n");
	104
	105	return val;
	106	}
	107
	108	if (devad >= 0)
	109	printf("%d.", devad);
	110
	111	printf("%d - 0x%x\n", reg, val & 0xffff);
	112	}
	113	}
	114	}
	115
	116	return 0;
	117	}
	118
	119	/* The register will be in the form [a[-b].]x[-y] */
088f1b19 KP	120	static int extract_reg_range(char input, int devadlo, int *devadhi,
088f1b19 KP	121	int reglo, int reghi)
995daa0b AF	122	{
	123	char *regstr;
	124
	125	/* use strrchr to find the last string after a '.' */
	126	regstr = strrchr(input, '.');
	127
	128	/* If it exists, extract the devad(s) */
	129	if (regstr) {
	130	char devadstr[32];
	131
	132	strncpy(devadstr, input, regstr - input);
	133	devadstr[regstr - input] = '\0';
	134
	135	if (extract_range(devadstr, devadlo, devadhi))
	136	return -1;
	137
	138	regstr++;
	139	} else {
	140	/* Otherwise, we have no devad, and we just got regs */
	141	devadlo = devadhi = MDIO_DEVAD_NONE;
	142
	143	regstr = input;
	144	}
	145
	146	return extract_range(regstr, reglo, reghi);
	147	}
	148
088f1b19	149	static int extract_phy_range(char const argv[], int argc, struct mii_dev *bus,
26b807c4	150	struct phy_device **phydev,
088f1b19	151	int addrlo, int addrhi)
995daa0b	152	{
26b807c4	153	struct phy_device dev = phydev;
995daa0b AF	154
	155	if ((argc < 1) \|\| (argc > 2))
	156	return -1;
	157
	158	/* If there are two arguments, it's busname addr */
	159	if (argc == 2) {
	160	*bus = miiphy_get_dev_by_name(argv[0]);
	161
	162	if (!*bus)
	163	return -1;
	164
	165	return extract_range(argv[1], addrlo, addrhi);
	166	}
	167
	168	/* It must be one argument, here */
	169
	170	/*
	171	* This argument can be one of two things:
	172	* 1) Ethernet device name
	173	* 2) Just an address (use the previously-used bus)
	174	*
	175	* We check all buses for a PHY which is connected to an ethernet
	176	* device by the given name. If none are found, we call
	177	* extract_range() on the string, and see if it's an address range.
	178	*/
26b807c4	179	dev = mdio_phydev_for_ethname(argv[0]);
995daa0b	180
26b807c4 SB	181	if (dev) {
	182	addrlo = addrhi = dev->addr;
	183	*bus = dev->bus;
995daa0b AF	184
	185	return 0;
	186	}
	187
	188	/* It's an address or nothing useful */
	189	return extract_range(argv[0], addrlo, addrhi);
	190	}
	191
	192	/* ---------------------------------------------------------------- */
09140113 SG	193	static int do_mdio(struct cmd_tbl *cmdtp, int flag, int argc,
09140113 SG	194	char *const argv[])
995daa0b AF	195	{
	196	char op[2];
	197	int addrlo, addrhi, reglo, reghi, devadlo, devadhi;
	198	unsigned short data;
	199	int pos = argc - 1;
	200	struct mii_dev *bus;
26b807c4 SB	201	struct phy_device *phydev = NULL;
26b807c4 SB	202	int extended = 0;
995daa0b AF	203
995daa0b AF	204	if (argc < 2)
4c12eeb8	205	return CMD_RET_USAGE;
995daa0b	206
c3452b50 AM	207	#ifdef CONFIG_DM_MDIO
	208	/* probe DM MII device before any operation so they are all accesible */
	209	dm_mdio_probe_devices();
	210	#endif
	211
995daa0b AF	212	/*
	213	* We use the last specified parameters, unless new ones are
	214	* entered.
	215	*/
	216	op[0] = argv[1][0];
	217	addrlo = last_addr_lo;
	218	addrhi = last_addr_hi;
	219	devadlo = last_devad_lo;
	220	devadhi = last_devad_hi;
	221	reglo = last_reg_lo;
	222	reghi = last_reg_hi;
	223	data = last_data;
	224
	225	bus = mdio_get_current_dev();
	226
	227	if (flag & CMD_FLAG_REPEAT)
	228	op[0] = last_op[0];
	229
26b807c4 SB	230	if (strlen(argv[1]) > 1) {
	231	op[1] = argv[1][1];
	232	if (op[1] == 'x') {
	233	phydev = mdio_phydev_for_ethname(argv[2]);
	234
	235	if (phydev) {
	236	addrlo = phydev->addr;
	237	addrhi = addrlo;
	238	bus = phydev->bus;
	239	extended = 1;
	240	} else {
e55047ec	241	return CMD_RET_FAILURE;
26b807c4 SB	242	}
	243
	244	if (!phydev->drv \|\|
	245	(!phydev->drv->writeext && (op[0] == 'w')) \|\|
	246	(!phydev->drv->readext && (op[0] == 'r'))) {
	247	puts("PHY does not have extended functions\n");
e55047ec	248	return CMD_RET_FAILURE;
26b807c4 SB	249	}
	250	}
	251	}
	252
995daa0b AF	253	switch (op[0]) {
	254	case 'w':
	255	if (pos > 1)
7e5f460e	256	data = hextoul(argv[pos--], NULL);
14a8adeb	257	/* Intentional fall-through - Get reg for read and write */
995daa0b AF	258	case 'r':
	259	if (pos > 1)
	260	if (extract_reg_range(argv[pos--], &devadlo, &devadhi,
c5503898	261	&reglo, &reghi))
e55047ec	262	return CMD_RET_FAILURE;
14a8adeb	263	/* Intentional fall-through - Get phy for all commands */
995daa0b AF	264	default:
995daa0b AF	265	if (pos > 1)
c5503898 MS	266	if (extract_phy_range(&argv[2], pos - 1, &bus,
c5503898 MS	267	&phydev, &addrlo, &addrhi))
e55047ec	268	return CMD_RET_FAILURE;
995daa0b AF	269
	270	break;
	271	}
	272
cb58d18b SG	273	if (!bus) {
	274	puts("No MDIO bus found\n");
	275	return CMD_RET_FAILURE;
	276	}
	277
995daa0b AF	278	if (op[0] == 'l') {
	279	mdio_list_devices();
	280
	281	return 0;
	282	}
	283
	284	/* Save the chosen bus */
	285	miiphy_set_current_dev(bus->name);
	286
	287	switch (op[0]) {
	288	case 'w':
e55047ec	289	mdio_write_ranges(bus, addrlo, addrhi, devadlo, devadhi,
26b807c4	290	reglo, reghi, data, extended);
995daa0b AF	291	break;
	292
	293	case 'r':
e55047ec	294	mdio_read_ranges(bus, addrlo, addrhi, devadlo, devadhi,
26b807c4	295	reglo, reghi, extended);
995daa0b AF	296	break;
	297	}
	298
	299	/*
	300	* Save the parameters for repeats.
	301	*/
	302	last_op[0] = op[0];
	303	last_addr_lo = addrlo;
	304	last_addr_hi = addrhi;
	305	last_devad_lo = devadlo;
	306	last_devad_hi = devadhi;
	307	last_reg_lo = reglo;
	308	last_reg_hi = reghi;
	309	last_data = data;
	310
	311	return 0;
	312	}
	313
	314	/***************************************************/
	315
	316	U_BOOT_CMD(
	317	mdio, 6, 1, do_mdio,
	318	"MDIO utility commands",
	319	"list - List MDIO buses\n"
	320	"mdio read <phydev> [<devad>.]<reg> - "
	321	"read PHY's register at <devad>.<reg>\n"
	322	"mdio write <phydev> [<devad>.]<reg> <data> - "
	323	"write PHY's register at <devad>.<reg>\n"
26b807c4 SB	324	"mdio rx <phydev> [<devad>.]<reg> - "
	325	"read PHY's extended register at <devad>.<reg>\n"
	326	"mdio wx <phydev> [<devad>.]<reg> <data> - "
	327	"write PHY's extended register at <devad>.<reg>\n"
995daa0b AF	328	"<phydev> may be:\n"
	329	" <busname> <addr>\n"
	330	" <addr>\n"
	331	" <eth name>\n"
	332	"<addr> <devad>, and <reg> may be ranges, e.g. 1-5.4-0x1f.\n"
	333	);