package/switch/src/switch-robo.c

   1 /*
   2  * Broadcom BCM5325E/536x switch configuration module
   3  *
   4  * Copyright (C) 2005 Felix Fietkau <nbd@nbd.name>
   5  * Copyright (C) 2008 Michael Buesch <mb@bu3sch.de>
   6  * Based on 'robocfg' by Oleg I. Vdovikin
   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
  10  * as published by the Free Software Foundation; either version 2
  11  * of 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., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301, USA.
  22  */
  23
  24 #include <linux/autoconf.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/if.h>
  28 #include <linux/if_arp.h>
  29 #include <linux/sockios.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/mii.h>
  32 #include <linux/delay.h>
  33 #include <asm/uaccess.h>
  34
  35 #include "switch-core.h"
  36 #include "etc53xx.h"
  37
  38 #define DRIVER_NAME             "bcm53xx"
  39 #define DRIVER_VERSION          "0.02"
  40 #define PFX                     "roboswitch: "
  41
  42 #define ROBO_PHY_ADDR           0x1E    /* robo switch phy address */
  43 #define ROBO_PHY_ADDR_TG3       0x01    /* Tigon3 PHY address */
  44
  45 /* MII registers */
  46 #define REG_MII_PAGE    0x10    /* MII Page register */
  47 #define REG_MII_ADDR    0x11    /* MII Address register */
  48 #define REG_MII_DATA0   0x18    /* MII Data register 0 */
  49
  50 #define REG_MII_PAGE_ENABLE     1
  51 #define REG_MII_ADDR_WRITE      1
  52 #define REG_MII_ADDR_READ       2
  53
  54 /* Robo device ID register (in ROBO_MGMT_PAGE) */
  55 #define ROBO_DEVICE_ID          0x30
  56 #define  ROBO_DEVICE_ID_5325    0x25 /* Faked */
  57 #define  ROBO_DEVICE_ID_5395    0x95
  58 #define  ROBO_DEVICE_ID_5397    0x97
  59 #define  ROBO_DEVICE_ID_5398    0x98
  60
  61 /* Private et.o ioctls */
  62 #define SIOCGETCPHYRD           (SIOCDEVPRIVATE + 9)
  63 #define SIOCSETCPHYWR           (SIOCDEVPRIVATE + 10)
  64
  65
  66 /* Data structure for a Roboswitch device. */
  67 struct robo_switch {
  68         char *device;                   /* The device name string (ethX) */
  69         u16 devid;                      /* ROBO_DEVICE_ID_53xx */
  70         bool use_et;
  71         bool is_5350;
  72         u8 phy_addr;                    /* PHY address of the device */
  73         struct ifreq ifr;
  74         struct net_device *dev;
  75         unsigned char port[6];
  76 };
  77
  78 /* Currently we can only have one device in the system. */
  79 static struct robo_switch robo;
  80
  81
  82 static int do_ioctl(int cmd, void *buf)
  83 {
  84         mm_segment_t old_fs = get_fs();
  85         int ret;
  86
  87         if (buf != NULL)
  88                 robo.ifr.ifr_data = (caddr_t) buf;
  89
  90         set_fs(KERNEL_DS);
  91         ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
  92         set_fs(old_fs);
  93
  94         return ret;
  95 }
  96
  97 static u16 mdio_read(__u16 phy_id, __u8 reg)
  98 {
  99         if (robo.use_et) {
 100                 int args[2] = { reg };
 101
 102                 if (phy_id != robo.phy_addr) {
 103                         printk(KERN_ERR PFX
 104                                 "Access to real 'phy' registers unavaliable.\n"
 105                                 "Upgrade kernel driver.\n");
 106
 107                         return 0xffff;
 108                 }
 109
 110
 111                 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
 112                         printk(KERN_ERR PFX
 113                                "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
 114                         return 0xffff;
 115                 }
 116
 117                 return args[1];
 118         } else {
 119                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
 120                 mii->phy_id = phy_id;
 121                 mii->reg_num = reg;
 122
 123                 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
 124                         printk(KERN_ERR PFX
 125                                "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
 126
 127                         return 0xffff;
 128                 }
 129
 130                 return mii->val_out;
 131         }
 132 }
 133
 134 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 135 {
 136         if (robo.use_et) {
 137                 int args[2] = { reg, val };
 138
 139                 if (phy_id != robo.phy_addr) {
 140                         printk(KERN_ERR PFX
 141                                 "Access to real 'phy' registers unavaliable.\n"
 142                                 "Upgrade kernel driver.\n");
 143
 144                         return;
 145                 }
 146
 147                 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
 148                         printk(KERN_ERR PFX
 149                                "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
 150                         return;
 151                 }
 152         } else {
 153                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
 154
 155                 mii->phy_id = phy_id;
 156                 mii->reg_num = reg;
 157                 mii->val_in = val;
 158
 159                 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
 160                         printk(KERN_ERR PFX
 161                                "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
 162                         return;
 163                 }
 164         }
 165 }
 166
 167 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 168 {
 169         int i = 3;
 170
 171         /* set page number */
 172         mdio_write(robo.phy_addr, REG_MII_PAGE,
 173                 (page << 8) | REG_MII_PAGE_ENABLE);
 174
 175         /* set register address */
 176         mdio_write(robo.phy_addr, REG_MII_ADDR,
 177                 (reg << 8) | op);
 178
 179         /* check if operation completed */
 180         while (i--) {
 181                 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
 182                         return 0;
 183         }
 184
 185         printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 186
 187         return 0;
 188 }
 189
 190 /*
 191 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 192 {
 193         int i;
 194
 195         robo_reg(page, reg, REG_MII_ADDR_READ);
 196
 197         for (i = 0; i < count; i++)
 198                 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
 199 }
 200 */
 201
 202 static __u16 robo_read16(__u8 page, __u8 reg)
 203 {
 204         robo_reg(page, reg, REG_MII_ADDR_READ);
 205
 206         return mdio_read(robo.phy_addr, REG_MII_DATA0);
 207 }
 208
 209 static __u32 robo_read32(__u8 page, __u8 reg)
 210 {
 211         robo_reg(page, reg, REG_MII_ADDR_READ);
 212
 213         return mdio_read(robo.phy_addr, REG_MII_DATA0) +
 214                 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
 215 }
 216
 217 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 218 {
 219         /* write data */
 220         mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
 221
 222         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 223 }
 224
 225 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 226 {
 227         /* write data */
 228         mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
 229         mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
 230
 231         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 232 }
 233
 234 /* checks that attached switch is 5325E/5350 */
 235 static int robo_vlan5350(void)
 236 {
 237         /* set vlan access id to 15 and read it back */
 238         __u16 val16 = 15;
 239         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 240
 241         /* 5365 will refuse this as it does not have this reg */
 242         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 243 }
 244
 245 static int robo_switch_enable(void)
 246 {
 247         unsigned int i, last_port;
 248         u16 val;
 249
 250         val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 251         if (!(val & (1 << 1))) {
 252                 /* Unmanaged mode */
 253                 val &= ~(1 << 0);
 254                 /* With forwarding */
 255                 val |= (1 << 1);
 256                 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
 257                 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 258                 if (!(val & (1 << 1))) {
 259                         printk("Failed to enable switch\n");
 260                         return -EBUSY;
 261                 }
 262
 263                 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
 264                                 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
 265                 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
 266                         robo_write16(ROBO_CTRL_PAGE, i, 0);
 267         }
 268
 269         /* WAN port LED */
 270         robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
 271
 272         return 0;
 273 }
 274
 275 static void robo_switch_reset(void)
 276 {
 277         if ((robo.devid == ROBO_DEVICE_ID_5395) ||
 278             (robo.devid == ROBO_DEVICE_ID_5397) ||
 279             (robo.devid == ROBO_DEVICE_ID_5398)) {
 280                 /* Trigger a software reset. */
 281                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
 282                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
 283         }
 284 }
 285
 286 static int robo_probe(char *devname)
 287 {
 288         __u32 phyid;
 289         unsigned int i;
 290         int err;
 291
 292         printk(KERN_INFO PFX "Probing device %s: ", devname);
 293         strcpy(robo.ifr.ifr_name, devname);
 294
 295         if ((robo.dev = dev_get_by_name(devname)) == NULL) {
 296                 printk("No such device\n");
 297                 return 1;
 298         }
 299
 300         robo.device = devname;
 301         for (i = 0; i < 5; i++)
 302                 robo.port[i] = i;
 303         robo.port[5] = 8;
 304
 305         /* try access using MII ioctls - get phy address */
 306         if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
 307                 robo.use_et = 1;
 308                 robo.phy_addr = ROBO_PHY_ADDR;
 309         } else {
 310                 /* got phy address check for robo address */
 311                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
 312                 if ((mii->phy_id != ROBO_PHY_ADDR) &&
 313                     (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
 314                         printk("Invalid phy address (%d)\n", mii->phy_id);
 315                         return 1;
 316                 }
 317                 robo.use_et = 0;
 318                 /* The robo has a fixed PHY address that is different from the
 319                  * Tigon3 PHY address. */
 320                 robo.phy_addr = ROBO_PHY_ADDR;
 321         }
 322
 323         phyid = mdio_read(robo.phy_addr, 0x2) |
 324                 (mdio_read(robo.phy_addr, 0x3) << 16);
 325
 326         if (phyid == 0xffffffff || phyid == 0x55210022) {
 327                 printk("No Robo switch in managed mode found\n");
 328                 return 1;
 329         }
 330
 331         /* Get the device ID */
 332         for (i = 0; i < 10; i++) {
 333                 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
 334                 if (robo.devid)
 335                         break;
 336                 udelay(10);
 337         }
 338         if (!robo.devid)
 339                 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
 340         robo.is_5350 = robo_vlan5350();
 341
 342         robo_switch_reset();
 343         err = robo_switch_enable();
 344         if (err)
 345                 return err;
 346
 347         printk("found!\n");
 348         return 0;
 349 }
 350
 351
 352 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 353 {
 354         __u16 val16;
 355         int len = 0;
 356         int j;
 357
 358         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 359
 360         if (robo.is_5350) {
 361                 u32 val32;
 362                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 363                 /* actual read */
 364                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 365                 if ((val32 & (1 << 20)) /* valid */) {
 366                         for (j = 0; j < 6; j++) {
 367                                 if (val32 & (1 << j)) {
 368                                         len += sprintf(buf + len, "%d", j);
 369                                         if (val32 & (1 << (j + 6))) {
 370                                                 if (j == 5) buf[len++] = 'u';
 371                                         } else {
 372                                                 buf[len++] = 't';
 373                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 374                                                         buf[len++] = '*';
 375                                         }
 376                                         buf[len++] = '\t';
 377                                 }
 378                         }
 379                         len += sprintf(buf + len, "\n");
 380                 }
 381         } else {
 382                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 383                 /* actual read */
 384                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 385                 if ((val16 & (1 << 14)) /* valid */) {
 386                         for (j = 0; j < 6; j++) {
 387                                 if (val16 & (1 << j)) {
 388                                         len += sprintf(buf + len, "%d", j);
 389                                         if (val16 & (1 << (j + 7))) {
 390                                                 if (j == 5) buf[len++] = 'u';
 391                                         } else {
 392                                                 buf[len++] = 't';
 393                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 394                                                         buf[len++] = '*';
 395                                         }
 396                                         buf[len++] = '\t';
 397                                 }
 398                         }
 399                         len += sprintf(buf + len, "\n");
 400                 }
 401         }
 402
 403         buf[len] = '\0';
 404
 405         return len;
 406 }
 407
 408 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 409 {
 410         switch_driver *d = (switch_driver *) driver;
 411         switch_vlan_config *c = switch_parse_vlan(d, buf);
 412         int j;
 413         __u16 val16;
 414
 415         if (c == NULL)
 416                 return -EINVAL;
 417
 418         for (j = 0; j < d->ports; j++) {
 419                 if ((c->untag | c->pvid) & (1 << j))
 420                         /* change default vlan tag */
 421                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 422         }
 423
 424         /* write config now */
 425         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 426         if (robo.is_5350) {
 427                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 428                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 429                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 430         } else {
 431                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 432                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 433                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 434         }
 435
 436         return 0;
 437 }
 438
 439 #define set_switch(state) \
 440         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 441
 442 static int handle_enable_read(void *driver, char *buf, int nr)
 443 {
 444         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 445 }
 446
 447 static int handle_enable_write(void *driver, char *buf, int nr)
 448 {
 449         set_switch(buf[0] == '1');
 450
 451         return 0;
 452 }
 453
 454 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 455 {
 456         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 457 }
 458
 459 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 460 {
 461         int disable = ((buf[0] != '1') ? 1 : 0);
 462
 463         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 464                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 465         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 466                 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
 467         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 468                 (1 << 6) /* drop invalid VID frames */);
 469         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 470                 (1 << 3) /* drop miss V table frames */);
 471
 472         return 0;
 473 }
 474
 475 static int handle_reset(void *driver, char *buf, int nr)
 476 {
 477         switch_driver *d = (switch_driver *) driver;
 478         switch_vlan_config *c = switch_parse_vlan(d, buf);
 479         int j;
 480         __u16 val16;
 481
 482         if (c == NULL)
 483                 return -EINVAL;
 484
 485         /* disable switching */
 486         set_switch(0);
 487
 488         /* reset vlans */
 489         for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 490                 /* write config now */
 491                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 492                 if (robo.is_5350)
 493                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 494                 else
 495                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 496                 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
 497                                                             ROBO_VLAN_TABLE_ACCESS,
 498                              val16);
 499         }
 500
 501         /* reset ports to a known good state */
 502         for (j = 0; j < d->ports; j++) {
 503                 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
 504                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 505         }
 506
 507         /* enable switching */
 508         set_switch(1);
 509
 510         /* enable vlans */
 511         handle_enable_vlan_write(driver, "1", 0);
 512
 513         return 0;
 514 }
 515
 516 static int __init robo_init(void)
 517 {
 518         int notfound = 1;
 519         char *device;
 520
 521         device = strdup("ethX");
 522         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 523                 notfound = robo_probe(device);
 524         }
 525         device[3]--;
 526
 527         if (notfound) {
 528                 kfree(device);
 529                 return -ENODEV;
 530         } else {
 531                 static const switch_config cfg[] = {
 532                         {
 533                                 .name   = "enable",
 534                                 .read   = handle_enable_read,
 535                                 .write  = handle_enable_write
 536                         }, {
 537                                 .name   = "enable_vlan",
 538                                 .read   = handle_enable_vlan_read,
 539                                 .write  = handle_enable_vlan_write
 540                         }, {
 541                                 .name   = "reset",
 542                                 .read   = NULL,
 543                                 .write  = handle_reset
 544                         }, { NULL, },
 545                 };
 546                 static const switch_config vlan[] = {
 547                         {
 548                                 .name   = "ports",
 549                                 .read   = handle_vlan_port_read,
 550                                 .write  = handle_vlan_port_write
 551                         }, { NULL, },
 552                 };
 553                 switch_driver driver = {
 554                         .name                   = DRIVER_NAME,
 555                         .version                = DRIVER_VERSION,
 556                         .interface              = device,
 557                         .cpuport                = 5,
 558                         .ports                  = 6,
 559                         .vlans                  = 16,
 560                         .driver_handlers        = cfg,
 561                         .port_handlers          = NULL,
 562                         .vlan_handlers          = vlan,
 563                 };
 564
 565                 return switch_register_driver(&driver);
 566         }
 567 }
 568
 569 static void __exit robo_exit(void)
 570 {
 571         switch_unregister_driver(DRIVER_NAME);
 572         kfree(robo.device);
 573 }
 574
 575
 576 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 577 MODULE_LICENSE("GPL");
 578
 579 module_init(robo_init);
 580 module_exit(robo_exit);