common/cmd_mdio.c

   1 /*
   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
  34 static char last_op[2];
  35 static uint last_data;
  36 static uint last_addr_lo;
  37 static uint last_addr_hi;
  38 static uint last_devad_lo;
  39 static uint last_devad_hi;
  40 static uint last_reg_lo;
  41 static uint last_reg_hi;
  42
  43 static 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
  60 int 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
  78 err_out:
  79         return err;
  80 }
  81
  82 int 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++) {
  94                                 u16 val;
  95                                 val = bus->read(bus, addr, devad, reg);
  96
  97                                 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] */
 115 int 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
 144 int 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 /* ---------------------------------------------------------------- */
 187 static 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)
 196                 return cmd_usage(cmdtp);
 197
 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
 273 U_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 );