summaryrefslogtreecommitdiffstats
path: root/common/cmd_mdio.c
blob: fb13d050752a7f2abeb615101e76046257477fe5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
/*
 * (C) Copyright 2011 Freescale Semiconductor, Inc
 * Andy Fleming
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * MDIO Commands
 */

#include <common.h>
#include <command.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, 0);
	if (end == input)
		return -1;

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

	return 0;
}

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

	for (addr = addrlo; addr <= addrhi; addr++) {
		for (devad = devadlo; devad <= devadhi; devad++) {
			for (reg = reglo; reg <= reghi; reg++) {
				if (!extended)
					err = bus->write(bus, addr, 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 phy_device *phydev, struct mii_dev *bus,
			    int addrlo,
			    int addrhi, int devadlo, int devadhi,
			    int reglo, int reghi, int extended)
{
	int addr, devad, reg;

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

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

				if (!extended)
					val = bus->read(bus, addr, 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(cmd_tbl_t *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;

	/*
	 * 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 -1;
			}

			if (!phydev->drv ||
			    (!phydev->drv->writeext && (op[0] == 'w')) ||
			    (!phydev->drv->readext && (op[0] == 'r'))) {
				puts("PHY does not have extended functions\n");
				return -1;
			}
		}
	}

	switch (op[0]) {
	case 'w':
		if (pos > 1)
			data = simple_strtoul(argv[pos--], NULL, 16);
	case 'r':
		if (pos > 1)
			if (extract_reg_range(argv[pos--], &devadlo, &devadhi,
					&reglo, &reghi))
				return -1;

	default:
		if (pos > 1)
			if (extract_phy_range(&(argv[2]), pos - 1, &bus,
					&phydev, &addrlo, &addrhi))
				return -1;

		break;
	}

	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(phydev, bus, addrlo, addrhi, devadlo, devadhi,
				  reglo, reghi, data, extended);
		break;

	case 'r':
		mdio_read_ranges(phydev, 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"
);
OpenPOWER on IntegriCloud