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Andy Fleming995daa02011-03-21 18:03:22 -05001/*
2 * (C) Copyright 2011 Freescale Semiconductor, Inc
3 * Andy Fleming
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24/*
25 * MDIO Commands
26 */
27
28#include <common.h>
29#include <command.h>
30#include <miiphy.h>
31#include <phy.h>
32
33
34static char last_op[2];
35static uint last_data;
36static uint last_addr_lo;
37static uint last_addr_hi;
38static uint last_devad_lo;
39static uint last_devad_hi;
40static uint last_reg_lo;
41static uint last_reg_hi;
42
43static int extract_range(char *input, int *plo, int *phi)
44{
45 char *end;
46 *plo = simple_strtol(input, &end, 0);
47 if (end == input)
48 return -1;
49
50 if ((*end == '-') && *(++end))
51 *phi = simple_strtol(end, NULL, 0);
52 else if (*end == '\0')
53 *phi = *plo;
54 else
55 return -1;
56
57 return 0;
58}
59
60int mdio_write_ranges(struct mii_dev *bus, int addrlo,
61 int addrhi, int devadlo, int devadhi,
62 int reglo, int reghi, unsigned short data)
63{
64 int addr, devad, reg;
65 int err = 0;
66
67 for (addr = addrlo; addr <= addrhi; addr++) {
68 for (devad = devadlo; devad <= devadhi; devad++) {
69 for (reg = reglo; reg <= reghi; reg++) {
70 err = bus->write(bus, addr, devad, reg, data);
71
72 if (err)
73 goto err_out;
74 }
75 }
76 }
77
78err_out:
79 return err;
80}
81
82int mdio_read_ranges(struct mii_dev *bus, int addrlo,
83 int addrhi, int devadlo, int devadhi,
84 int reglo, int reghi)
85{
86 int addr, devad, reg;
87
88 printf("Reading from bus %s\n", bus->name);
89 for (addr = addrlo; addr <= addrhi; addr++) {
90 printf("PHY at address %d:\n", addr);
91
92 for (devad = devadlo; devad <= devadhi; devad++) {
93 for (reg = reglo; reg <= reghi; reg++) {
Anatolij Gustschina621b162011-04-30 02:39:29 +000094 int val;
Andy Fleming995daa02011-03-21 18:03:22 -050095
Anatolij Gustschina621b162011-04-30 02:39:29 +000096 val = bus->read(bus, addr, devad, reg);
Andy Fleming995daa02011-03-21 18:03:22 -050097 if (val < 0) {
98 printf("Error\n");
99
100 return val;
101 }
102
103 if (devad >= 0)
104 printf("%d.", devad);
105
106 printf("%d - 0x%x\n", reg, val & 0xffff);
107 }
108 }
109 }
110
111 return 0;
112}
113
114/* The register will be in the form [a[-b].]x[-y] */
115int extract_reg_range(char *input, int *devadlo, int *devadhi,
116 int *reglo, int *reghi)
117{
118 char *regstr;
119
120 /* use strrchr to find the last string after a '.' */
121 regstr = strrchr(input, '.');
122
123 /* If it exists, extract the devad(s) */
124 if (regstr) {
125 char devadstr[32];
126
127 strncpy(devadstr, input, regstr - input);
128 devadstr[regstr - input] = '\0';
129
130 if (extract_range(devadstr, devadlo, devadhi))
131 return -1;
132
133 regstr++;
134 } else {
135 /* Otherwise, we have no devad, and we just got regs */
136 *devadlo = *devadhi = MDIO_DEVAD_NONE;
137
138 regstr = input;
139 }
140
141 return extract_range(regstr, reglo, reghi);
142}
143
144int extract_phy_range(char *const argv[], int argc, struct mii_dev **bus,
145 int *addrlo, int *addrhi)
146{
147 struct phy_device *phydev;
148
149 if ((argc < 1) || (argc > 2))
150 return -1;
151
152 /* If there are two arguments, it's busname addr */
153 if (argc == 2) {
154 *bus = miiphy_get_dev_by_name(argv[0]);
155
156 if (!*bus)
157 return -1;
158
159 return extract_range(argv[1], addrlo, addrhi);
160 }
161
162 /* It must be one argument, here */
163
164 /*
165 * This argument can be one of two things:
166 * 1) Ethernet device name
167 * 2) Just an address (use the previously-used bus)
168 *
169 * We check all buses for a PHY which is connected to an ethernet
170 * device by the given name. If none are found, we call
171 * extract_range() on the string, and see if it's an address range.
172 */
173 phydev = mdio_phydev_for_ethname(argv[0]);
174
175 if (phydev) {
176 *addrlo = *addrhi = phydev->addr;
177 *bus = phydev->bus;
178
179 return 0;
180 }
181
182 /* It's an address or nothing useful */
183 return extract_range(argv[0], addrlo, addrhi);
184}
185
186/* ---------------------------------------------------------------- */
187static int do_mdio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
188{
189 char op[2];
190 int addrlo, addrhi, reglo, reghi, devadlo, devadhi;
191 unsigned short data;
192 int pos = argc - 1;
193 struct mii_dev *bus;
194
195 if (argc < 2)
Simon Glass4c12eeb2011-12-10 08:44:01 +0000196 return CMD_RET_USAGE;
Andy Fleming995daa02011-03-21 18:03:22 -0500197
198 /*
199 * We use the last specified parameters, unless new ones are
200 * entered.
201 */
202 op[0] = argv[1][0];
203 addrlo = last_addr_lo;
204 addrhi = last_addr_hi;
205 devadlo = last_devad_lo;
206 devadhi = last_devad_hi;
207 reglo = last_reg_lo;
208 reghi = last_reg_hi;
209 data = last_data;
210
211 bus = mdio_get_current_dev();
212
213 if (flag & CMD_FLAG_REPEAT)
214 op[0] = last_op[0];
215
216 switch (op[0]) {
217 case 'w':
218 if (pos > 1)
219 data = simple_strtoul(argv[pos--], NULL, 16);
220 case 'r':
221 if (pos > 1)
222 if (extract_reg_range(argv[pos--], &devadlo, &devadhi,
223 &reglo, &reghi))
224 return -1;
225
226 default:
227 if (pos > 1)
228 if (extract_phy_range(&(argv[2]), pos - 1, &bus,
229 &addrlo, &addrhi))
230 return -1;
231
232 break;
233 }
234
235 if (op[0] == 'l') {
236 mdio_list_devices();
237
238 return 0;
239 }
240
241 /* Save the chosen bus */
242 miiphy_set_current_dev(bus->name);
243
244 switch (op[0]) {
245 case 'w':
246 mdio_write_ranges(bus, addrlo, addrhi, devadlo, devadhi,
247 reglo, reghi, data);
248 break;
249
250 case 'r':
251 mdio_read_ranges(bus, addrlo, addrhi, devadlo, devadhi,
252 reglo, reghi);
253 break;
254 }
255
256 /*
257 * Save the parameters for repeats.
258 */
259 last_op[0] = op[0];
260 last_addr_lo = addrlo;
261 last_addr_hi = addrhi;
262 last_devad_lo = devadlo;
263 last_devad_hi = devadhi;
264 last_reg_lo = reglo;
265 last_reg_hi = reghi;
266 last_data = data;
267
268 return 0;
269}
270
271/***************************************************/
272
273U_BOOT_CMD(
274 mdio, 6, 1, do_mdio,
275 "MDIO utility commands",
276 "list - List MDIO buses\n"
277 "mdio read <phydev> [<devad>.]<reg> - "
278 "read PHY's register at <devad>.<reg>\n"
279 "mdio write <phydev> [<devad>.]<reg> <data> - "
280 "write PHY's register at <devad>.<reg>\n"
281 "<phydev> may be:\n"
282 " <busname> <addr>\n"
283 " <addr>\n"
284 " <eth name>\n"
285 "<addr> <devad>, and <reg> may be ranges, e.g. 1-5.4-0x1f.\n"
286);