net/dsa/mv88e6123_61_65.c

   1 /*
   2  * net/dsa/mv88e6123_61_65.c - Marvell 88e6123/6161/6165 switch chip support
   3  * Copyright (c) 2008 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/list.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/phy.h>
  14 #include "dsa_priv.h"
  15 #include "mv88e6xxx.h"
  16
  17 static char *mv88e6123_61_65_probe(struct mii_bus *bus, int sw_addr)
  18 {
  19         int ret;
  20
  21         ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), 0x03);
  22         if (ret >= 0) {
  23                 ret &= 0xfff0;
  24                 if (ret == 0x1210)
  25                         return "Marvell 88E6123";
  26                 if (ret == 0x1610)
  27                         return "Marvell 88E6161";
  28                 if (ret == 0x1650)
  29                         return "Marvell 88E6165";
  30         }
  31
  32         return NULL;
  33 }
  34
  35 static int mv88e6123_61_65_switch_reset(struct dsa_switch *ds)
  36 {
  37         int i;
  38         int ret;
  39
  40         /*
  41          * Set all ports to the disabled state.
  42          */
  43         for (i = 0; i < 8; i++) {
  44                 ret = REG_READ(REG_PORT(i), 0x04);
  45                 REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc);
  46         }
  47
  48         /*
  49          * Wait for transmit queues to drain.
  50          */
  51         msleep(2);
  52
  53         /*
  54          * Reset the switch.
  55          */
  56         REG_WRITE(REG_GLOBAL, 0x04, 0xc400);
  57
  58         /*
  59          * Wait up to one second for reset to complete.
  60          */
  61         for (i = 0; i < 1000; i++) {
  62                 ret = REG_READ(REG_GLOBAL, 0x00);
  63                 if ((ret & 0xc800) == 0xc800)
  64                         break;
  65
  66                 msleep(1);
  67         }
  68         if (i == 1000)
  69                 return -ETIMEDOUT;
  70
  71         return 0;
  72 }
  73
  74 static int mv88e6123_61_65_setup_global(struct dsa_switch *ds)
  75 {
  76         int ret;
  77         int i;
  78
  79         /*
  80          * Disable the PHY polling unit (since there won't be any
  81          * external PHYs to poll), don't discard packets with
  82          * excessive collisions, and mask all interrupt sources.
  83          */
  84         REG_WRITE(REG_GLOBAL, 0x04, 0x0000);
  85
  86         /*
  87          * Set the default address aging time to 5 minutes, and
  88          * enable address learn messages to be sent to all message
  89          * ports.
  90          */
  91         REG_WRITE(REG_GLOBAL, 0x0a, 0x0148);
  92
  93         /*
  94          * Configure the priority mapping registers.
  95          */
  96         ret = mv88e6xxx_config_prio(ds);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /*
 101          * Configure the cpu port, and configure the cpu port as the
 102          * port to which ingress and egress monitor frames are to be
 103          * sent.
 104          */
 105         REG_WRITE(REG_GLOBAL, 0x1a, (ds->cpu_port * 0x1110));
 106
 107         /*
 108          * Disable remote management for now, and set the switch's
 109          * DSA device number to zero.
 110          */
 111         REG_WRITE(REG_GLOBAL, 0x1c, 0x0000);
 112
 113         /*
 114          * Send all frames with destination addresses matching
 115          * 01:80:c2:00:00:2x to the CPU port.
 116          */
 117         REG_WRITE(REG_GLOBAL2, 0x02, 0xffff);
 118
 119         /*
 120          * Send all frames with destination addresses matching
 121          * 01:80:c2:00:00:0x to the CPU port.
 122          */
 123         REG_WRITE(REG_GLOBAL2, 0x03, 0xffff);
 124
 125         /*
 126          * Disable the loopback filter, disable flow control
 127          * messages, disable flood broadcast override, disable
 128          * removing of provider tags, disable ATU age violation
 129          * interrupts, disable tag flow control, force flow
 130          * control priority to the highest, and send all special
 131          * multicast frames to the CPU at the highest priority.
 132          */
 133         REG_WRITE(REG_GLOBAL2, 0x05, 0x00ff);
 134
 135         /*
 136          * Map all DSA device IDs to the CPU port.
 137          */
 138         for (i = 0; i < 32; i++)
 139                 REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | ds->cpu_port);
 140
 141         /*
 142          * Clear all trunk masks.
 143          */
 144         for (i = 0; i < 8; i++)
 145                 REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0xff);
 146
 147         /*
 148          * Clear all trunk mappings.
 149          */
 150         for (i = 0; i < 16; i++)
 151                 REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 | (i << 11));
 152
 153         /*
 154          * Disable ingress rate limiting by resetting all ingress
 155          * rate limit registers to their initial state.
 156          */
 157         for (i = 0; i < 6; i++)
 158                 REG_WRITE(REG_GLOBAL2, 0x09, 0x9000 | (i << 8));
 159
 160         /*
 161          * Initialise cross-chip port VLAN table to reset defaults.
 162          */
 163         REG_WRITE(REG_GLOBAL2, 0x0b, 0x9000);
 164
 165         /*
 166          * Clear the priority override table.
 167          */
 168         for (i = 0; i < 16; i++)
 169                 REG_WRITE(REG_GLOBAL2, 0x0f, 0x8000 | (i << 8));
 170
 171         /* @@@ initialise AVB (22/23) watchdog (27) sdet (29) registers */
 172
 173         return 0;
 174 }
 175
 176 static int mv88e6123_61_65_setup_port(struct dsa_switch *ds, int p)
 177 {
 178         int addr = REG_PORT(p);
 179
 180         /*
 181          * MAC Forcing register: don't force link, speed, duplex
 182          * or flow control state to any particular values.
 183          */
 184         REG_WRITE(addr, 0x01, 0x0003);
 185
 186         /*
 187          * Do not limit the period of time that this port can be
 188          * paused for by the remote end or the period of time that
 189          * this port can pause the remote end.
 190          */
 191         REG_WRITE(addr, 0x02, 0x0000);
 192
 193         /*
 194          * Port Control: disable Drop-on-Unlock, disable Drop-on-Lock,
 195          * configure the requested (DSA/EDSA) tagging mode if this is
 196          * the CPU port, disable Header mode, enable IGMP/MLD snooping,
 197          * disable VLAN tunneling, determine priority by looking at
 198          * 802.1p and IP priority fields (IP prio has precedence), and
 199          * set STP state to Forwarding.  Finally, if this is the CPU
 200          * port, additionally enable forwarding of unknown unicast and
 201          * multicast addresses.
 202          */
 203         REG_WRITE(addr, 0x04,
 204                         (p == ds->cpu_port) ?
 205                          (ds->tag_protocol == htons(ETH_P_DSA)) ?
 206                           0x053f : 0x373f :
 207                          0x0433);
 208
 209         /*
 210          * Port Control 1: disable trunking.  Also, if this is the
 211          * CPU port, enable learn messages to be sent to this port.
 212          */
 213         REG_WRITE(addr, 0x05, (p == ds->cpu_port) ? 0x8000 : 0x0000);
 214
 215         /*
 216          * Port based VLAN map: give each port its own address
 217          * database, allow the CPU port to talk to each of the 'real'
 218          * ports, and allow each of the 'real' ports to only talk to
 219          * the CPU port.
 220          */
 221         REG_WRITE(addr, 0x06,
 222                         ((p & 0xf) << 12) |
 223                          ((p == ds->cpu_port) ?
 224                                 ds->valid_port_mask :
 225                                 (1 << ds->cpu_port)));
 226
 227         /*
 228          * Default VLAN ID and priority: don't set a default VLAN
 229          * ID, and set the default packet priority to zero.
 230          */
 231         REG_WRITE(addr, 0x07, 0x0000);
 232
 233         /*
 234          * Port Control 2: don't force a good FCS, set the maximum
 235          * frame size to 10240 bytes, don't let the switch add or
 236          * strip 802.1q tags, don't discard tagged or untagged frames
 237          * on this port, do a destination address lookup on all
 238          * received packets as usual, disable ARP mirroring and don't
 239          * send a copy of all transmitted/received frames on this port
 240          * to the CPU.
 241          */
 242         REG_WRITE(addr, 0x08, 0x2080);
 243
 244         /*
 245          * Egress rate control: disable egress rate control.
 246          */
 247         REG_WRITE(addr, 0x09, 0x0001);
 248
 249         /*
 250          * Egress rate control 2: disable egress rate control.
 251          */
 252         REG_WRITE(addr, 0x0a, 0x0000);
 253
 254         /*
 255          * Port Association Vector: when learning source addresses
 256          * of packets, add the address to the address database using
 257          * a port bitmap that has only the bit for this port set and
 258          * the other bits clear.
 259          */
 260         REG_WRITE(addr, 0x0b, 1 << p);
 261
 262         /*
 263          * Port ATU control: disable limiting the number of address
 264          * database entries that this port is allowed to use.
 265          */
 266         REG_WRITE(addr, 0x0c, 0x0000);
 267
 268         /*
 269          * Priorit Override: disable DA, SA and VTU priority override.
 270          */
 271         REG_WRITE(addr, 0x0d, 0x0000);
 272
 273         /*
 274          * Port Ethertype: use the Ethertype DSA Ethertype value.
 275          */
 276         REG_WRITE(addr, 0x0f, ETH_P_EDSA);
 277
 278         /*
 279          * Tag Remap: use an identity 802.1p prio -> switch prio
 280          * mapping.
 281          */
 282         REG_WRITE(addr, 0x18, 0x3210);
 283
 284         /*
 285          * Tag Remap 2: use an identity 802.1p prio -> switch prio
 286          * mapping.
 287          */
 288         REG_WRITE(addr, 0x19, 0x7654);
 289
 290         return 0;
 291 }
 292
 293 static int mv88e6123_61_65_setup(struct dsa_switch *ds)
 294 {
 295         struct mv88e6xxx_priv_state *ps = (void *)(ds + 1);
 296         int i;
 297         int ret;
 298
 299         mutex_init(&ps->smi_mutex);
 300         mutex_init(&ps->stats_mutex);
 301
 302         ret = mv88e6123_61_65_switch_reset(ds);
 303         if (ret < 0)
 304                 return ret;
 305
 306         /* @@@ initialise vtu and atu */
 307
 308         ret = mv88e6123_61_65_setup_global(ds);
 309         if (ret < 0)
 310                 return ret;
 311
 312         for (i = 0; i < 6; i++) {
 313                 ret = mv88e6123_61_65_setup_port(ds, i);
 314                 if (ret < 0)
 315                         return ret;
 316         }
 317
 318         return 0;
 319 }
 320
 321 static int mv88e6123_61_65_port_to_phy_addr(int port)
 322 {
 323         if (port >= 0 && port <= 4)
 324                 return port;
 325         return -1;
 326 }
 327
 328 static int
 329 mv88e6123_61_65_phy_read(struct dsa_switch *ds, int port, int regnum)
 330 {
 331         int addr = mv88e6123_61_65_port_to_phy_addr(port);
 332         return mv88e6xxx_phy_read(ds, addr, regnum);
 333 }
 334
 335 static int
 336 mv88e6123_61_65_phy_write(struct dsa_switch *ds,
 337                               int port, int regnum, u16 val)
 338 {
 339         int addr = mv88e6123_61_65_port_to_phy_addr(port);
 340         return mv88e6xxx_phy_write(ds, addr, regnum, val);
 341 }
 342
 343 static struct mv88e6xxx_hw_stat mv88e6123_61_65_hw_stats[] = {
 344         { "in_good_octets", 8, 0x00, },
 345         { "in_bad_octets", 4, 0x02, },
 346         { "in_unicast", 4, 0x04, },
 347         { "in_broadcasts", 4, 0x06, },
 348         { "in_multicasts", 4, 0x07, },
 349         { "in_pause", 4, 0x16, },
 350         { "in_undersize", 4, 0x18, },
 351         { "in_fragments", 4, 0x19, },
 352         { "in_oversize", 4, 0x1a, },
 353         { "in_jabber", 4, 0x1b, },
 354         { "in_rx_error", 4, 0x1c, },
 355         { "in_fcs_error", 4, 0x1d, },
 356         { "out_octets", 8, 0x0e, },
 357         { "out_unicast", 4, 0x10, },
 358         { "out_broadcasts", 4, 0x13, },
 359         { "out_multicasts", 4, 0x12, },
 360         { "out_pause", 4, 0x15, },
 361         { "excessive", 4, 0x11, },
 362         { "collisions", 4, 0x1e, },
 363         { "deferred", 4, 0x05, },
 364         { "single", 4, 0x14, },
 365         { "multiple", 4, 0x17, },
 366         { "out_fcs_error", 4, 0x03, },
 367         { "late", 4, 0x1f, },
 368         { "hist_64bytes", 4, 0x08, },
 369         { "hist_65_127bytes", 4, 0x09, },
 370         { "hist_128_255bytes", 4, 0x0a, },
 371         { "hist_256_511bytes", 4, 0x0b, },
 372         { "hist_512_1023bytes", 4, 0x0c, },
 373         { "hist_1024_max_bytes", 4, 0x0d, },
 374 };
 375
 376 static void
 377 mv88e6123_61_65_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
 378 {
 379         mv88e6xxx_get_strings(ds, ARRAY_SIZE(mv88e6123_61_65_hw_stats),
 380                               mv88e6123_61_65_hw_stats, port, data);
 381 }
 382
 383 static void
 384 mv88e6123_61_65_get_ethtool_stats(struct dsa_switch *ds,
 385                                   int port, uint64_t *data)
 386 {
 387         mv88e6xxx_get_ethtool_stats(ds, ARRAY_SIZE(mv88e6123_61_65_hw_stats),
 388                                     mv88e6123_61_65_hw_stats, port, data);
 389 }
 390
 391 static int mv88e6123_61_65_get_sset_count(struct dsa_switch *ds)
 392 {
 393         return ARRAY_SIZE(mv88e6123_61_65_hw_stats);
 394 }
 395
 396 static struct dsa_switch_driver mv88e6123_61_65_switch_driver = {
 397         .tag_protocol           = __constant_htons(ETH_P_EDSA),
 398         .priv_size              = sizeof(struct mv88e6xxx_priv_state),
 399         .probe                  = mv88e6123_61_65_probe,
 400         .setup                  = mv88e6123_61_65_setup,
 401         .set_addr               = mv88e6xxx_set_addr_indirect,
 402         .phy_read               = mv88e6123_61_65_phy_read,
 403         .phy_write              = mv88e6123_61_65_phy_write,
 404         .poll_link              = mv88e6xxx_poll_link,
 405         .get_strings            = mv88e6123_61_65_get_strings,
 406         .get_ethtool_stats      = mv88e6123_61_65_get_ethtool_stats,
 407         .get_sset_count         = mv88e6123_61_65_get_sset_count,
 408 };
 409
 410 int __init mv88e6123_61_65_init(void)
 411 {
 412         register_switch_driver(&mv88e6123_61_65_switch_driver);
 413         return 0;
 414 }
 415 module_init(mv88e6123_61_65_init);
 416
 417 void __exit mv88e6123_61_65_cleanup(void)
 418 {
 419         unregister_switch_driver(&mv88e6123_61_65_switch_driver);
 420 }
 421 module_exit(mv88e6123_61_65_cleanup);