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/module.h>
  25 #include <linux/init.h>
  26 #include <linux/if.h>
  27 #include <linux/if_arp.h>
  28 #include <linux/sockios.h>
  29 #include <linux/ethtool.h>
  30 #include <linux/mii.h>
  31 #include <linux/delay.h>
  32 #include <asm/uaccess.h>
  33
  34 #include "switch-core.h"
  35 #include "etc53xx.h"
  36
  37 #ifdef CONFIG_BCM47XX
  38 #include <nvram.h>
  39 #endif
  40
  41 #define DRIVER_NAME             "bcm53xx"
  42 #define DRIVER_VERSION          "0.02"
  43 #define PFX                     "roboswitch: "
  44
  45 #define ROBO_PHY_ADDR           0x1E    /* robo switch phy address */
  46 #define ROBO_PHY_ADDR_TG3       0x01    /* Tigon3 PHY address */
  47 #define ROBO_PHY_ADDR_BCM63XX   0x00    /* BCM63XX PHY address */
  48
  49 /* MII registers */
  50 #define REG_MII_PAGE    0x10    /* MII Page register */
  51 #define REG_MII_ADDR    0x11    /* MII Address register */
  52 #define REG_MII_DATA0   0x18    /* MII Data register 0 */
  53
  54 #define REG_MII_PAGE_ENABLE     1
  55 #define REG_MII_ADDR_WRITE      1
  56 #define REG_MII_ADDR_READ       2
  57
  58 /* Robo device ID register (in ROBO_MGMT_PAGE) */
  59 #define ROBO_DEVICE_ID          0x30
  60 #define  ROBO_DEVICE_ID_5325    0x25 /* Faked */
  61 #define  ROBO_DEVICE_ID_5395    0x95
  62 #define  ROBO_DEVICE_ID_5397    0x97
  63 #define  ROBO_DEVICE_ID_5398    0x98
  64 #define  ROBO_DEVICE_ID_53115   0x3115
  65
  66 /* Private et.o ioctls */
  67 #define SIOCGETCPHYRD           (SIOCDEVPRIVATE + 9)
  68 #define SIOCSETCPHYWR           (SIOCDEVPRIVATE + 10)
  69
  70 /* Data structure for a Roboswitch device. */
  71 struct robo_switch {
  72         char *device;                   /* The device name string (ethX) */
  73         u16 devid;                      /* ROBO_DEVICE_ID_53xx */
  74         bool is_5350;
  75         struct ifreq ifr;
  76         struct net_device *dev;
  77         unsigned char port[6];
  78 };
  79
  80 /* Currently we can only have one device in the system. */
  81 static struct robo_switch robo;
  82
  83
  84 static int do_ioctl(int cmd)
  85 {
  86         mm_segment_t old_fs = get_fs();
  87         int ret;
  88
  89         set_fs(KERNEL_DS);
  90         ret = robo.dev->netdev_ops->ndo_do_ioctl(robo.dev, &robo.ifr, cmd);
  91         set_fs(old_fs);
  92
  93         return ret;
  94 }
  95
  96 static u16 mdio_read(__u16 phy_id, __u8 reg)
  97 {
  98         struct mii_ioctl_data *mii = if_mii(&robo.ifr);
  99         int err;
 100
 101         mii->phy_id = phy_id;
 102         mii->reg_num = reg;
 103
 104         err = do_ioctl(SIOCGMIIREG);
 105         if (err < 0) {
 106                 printk(KERN_ERR PFX
 107                        "[%s:%d] SIOCGMIIREG failed! err: %i\n", __FILE__, __LINE__, err);
 108
 109                 return 0xffff;
 110         }
 111
 112         return mii->val_out;
 113 }
 114
 115 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 116 {
 117         struct mii_ioctl_data *mii = if_mii(&robo.ifr);
 118         int err;
 119
 120         mii->phy_id = phy_id;
 121         mii->reg_num = reg;
 122         mii->val_in = val;
 123
 124         err = do_ioctl(SIOCSMIIREG);
 125         if (err < 0) {
 126                 printk(KERN_ERR PFX
 127                        "[%s:%d] SIOCSMIIREG failed! err: %i\n", __FILE__, __LINE__, err);
 128                 return;
 129         }
 130 }
 131
 132 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 133 {
 134         int i = 3;
 135
 136         /* set page number */
 137         mdio_write(ROBO_PHY_ADDR, REG_MII_PAGE,
 138                 (page << 8) | REG_MII_PAGE_ENABLE);
 139
 140         /* set register address */
 141         mdio_write(ROBO_PHY_ADDR, REG_MII_ADDR,
 142                 (reg << 8) | op);
 143
 144         /* check if operation completed */
 145         while (i--) {
 146                 if ((mdio_read(ROBO_PHY_ADDR, REG_MII_ADDR) & 3) == 0)
 147                         return 0;
 148         }
 149
 150         printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 151
 152         return 0;
 153 }
 154
 155 /*
 156 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 157 {
 158         int i;
 159
 160         robo_reg(page, reg, REG_MII_ADDR_READ);
 161
 162         for (i = 0; i < count; i++)
 163                 val[i] = mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + i);
 164 }
 165 */
 166
 167 static __u16 robo_read16(__u8 page, __u8 reg)
 168 {
 169         robo_reg(page, reg, REG_MII_ADDR_READ);
 170
 171         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0);
 172 }
 173
 174 static __u32 robo_read32(__u8 page, __u8 reg)
 175 {
 176         robo_reg(page, reg, REG_MII_ADDR_READ);
 177
 178         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0) +
 179                 (mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + 1) << 16);
 180 }
 181
 182 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 183 {
 184         /* write data */
 185         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val16);
 186
 187         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 188 }
 189
 190 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 191 {
 192         /* write data */
 193         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val32 & 65535);
 194         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0 + 1, val32 >> 16);
 195
 196         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 197 }
 198
 199 /* checks that attached switch is 5325E/5350 */
 200 static int robo_vlan5350(void)
 201 {
 202         /* set vlan access id to 15 and read it back */
 203         __u16 val16 = 15;
 204         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 205
 206         /* 5365 will refuse this as it does not have this reg */
 207         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 208 }
 209
 210 static int robo_switch_enable(void)
 211 {
 212         unsigned int i, last_port;
 213         u16 val;
 214 #ifdef CONFIG_BCM47XX
 215         char buf[20];
 216 #endif
 217
 218         val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 219         if (!(val & (1 << 1))) {
 220                 /* Unmanaged mode */
 221                 val &= ~(1 << 0);
 222                 /* With forwarding */
 223                 val |= (1 << 1);
 224                 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
 225                 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 226                 if (!(val & (1 << 1))) {
 227                         printk("Failed to enable switch\n");
 228                         return -EBUSY;
 229                 }
 230
 231                 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
 232                                 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
 233                 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
 234                         robo_write16(ROBO_CTRL_PAGE, i, 0);
 235         }
 236
 237 #ifdef CONFIG_BCM47XX
 238         /* WAN port LED, except for Netgear WGT634U */
 239         if (nvram_getenv("nvram_type", buf, sizeof(buf)) >= 0) {
 240                 if (strcmp(buf, "cfe") != 0)
 241                         robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
 242         }
 243 #endif
 244         return 0;
 245 }
 246
 247 static void robo_switch_reset(void)
 248 {
 249         if ((robo.devid == ROBO_DEVICE_ID_5395) ||
 250             (robo.devid == ROBO_DEVICE_ID_5397) ||
 251             (robo.devid == ROBO_DEVICE_ID_5398)) {
 252                 /* Trigger a software reset. */
 253                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
 254                 mdelay(500);
 255                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
 256         }
 257 }
 258
 259 static int robo_probe(char *devname)
 260 {
 261         __u32 phyid;
 262         unsigned int i;
 263         int err = 1;
 264
 265         printk(KERN_INFO PFX "Probing device %s: ", devname);
 266         strcpy(robo.ifr.ifr_name, devname);
 267
 268         if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
 269                 printk("No such device\n");
 270                 return 1;
 271         }
 272         if (!robo.dev->netdev_ops || !robo.dev->netdev_ops->ndo_do_ioctl) {
 273                 printk("ndo_do_ioctl not implemented in ethernet driver\n");
 274                 return 1;
 275         }
 276
 277         robo.device = devname;
 278         for (i = 0; i < 5; i++)
 279                 robo.port[i] = i;
 280         robo.port[5] = 8;
 281
 282         /* try access using MII ioctls - get phy address */
 283         if (do_ioctl(SIOCGMIIPHY) < 0) {
 284                 printk("error while accessing MII phy registers with ioctls\n");
 285                 goto done;
 286         }
 287
 288         /* got phy address check for robo address */
 289         struct mii_ioctl_data *mii = if_mii(&robo.ifr);
 290         if ((mii->phy_id != ROBO_PHY_ADDR) &&
 291             (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
 292             (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
 293                 printk("Invalid phy address (%d)\n", mii->phy_id);
 294                 goto done;
 295         }
 296
 297         phyid = mdio_read(ROBO_PHY_ADDR, 0x2) |
 298                 (mdio_read(ROBO_PHY_ADDR, 0x3) << 16);
 299
 300         if (phyid == 0xffffffff || phyid == 0x55210022) {
 301                 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
 302                 goto done;
 303         }
 304
 305         /* Get the device ID */
 306         for (i = 0; i < 10; i++) {
 307                 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
 308                 if (robo.devid)
 309                         break;
 310                 udelay(10);
 311         }
 312         if (!robo.devid)
 313                 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
 314         robo.is_5350 = robo_vlan5350();
 315
 316         robo_switch_reset();
 317         err = robo_switch_enable();
 318         if (err)
 319                 goto done;
 320         err = 0;
 321
 322         printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
 323                 robo.is_5350 ? " It's a 5350." : "");
 324
 325 done:
 326         if (err) {
 327                 dev_put(robo.dev);
 328                 robo.dev = NULL;
 329         }
 330         return err;
 331 }
 332
 333
 334 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 335 {
 336         __u16 val16;
 337         int len = 0;
 338         int j;
 339
 340         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 341
 342         if (robo.is_5350) {
 343                 u32 val32;
 344                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 345                 /* actual read */
 346                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 347                 if ((val32 & (1 << 20)) /* valid */) {
 348                         for (j = 0; j < 6; j++) {
 349                                 if (val32 & (1 << j)) {
 350                                         len += sprintf(buf + len, "%d", j);
 351                                         if (val32 & (1 << (j + 6))) {
 352                                                 if (j == 5) buf[len++] = 'u';
 353                                         } else {
 354                                                 buf[len++] = 't';
 355                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 356                                                         buf[len++] = '*';
 357                                         }
 358                                         buf[len++] = '\t';
 359                                 }
 360                         }
 361                         len += sprintf(buf + len, "\n");
 362                 }
 363         } else {
 364                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 365                 /* actual read */
 366                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 367                 if ((val16 & (1 << 14)) /* valid */) {
 368                         for (j = 0; j < 6; j++) {
 369                                 if (val16 & (1 << j)) {
 370                                         len += sprintf(buf + len, "%d", j);
 371                                         if (val16 & (1 << (j + 7))) {
 372                                                 if (j == 5) buf[len++] = 'u';
 373                                         } else {
 374                                                 buf[len++] = 't';
 375                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 376                                                         buf[len++] = '*';
 377                                         }
 378                                         buf[len++] = '\t';
 379                                 }
 380                         }
 381                         len += sprintf(buf + len, "\n");
 382                 }
 383         }
 384
 385         buf[len] = '\0';
 386
 387         return len;
 388 }
 389
 390 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 391 {
 392         switch_driver *d = (switch_driver *) driver;
 393         switch_vlan_config *c = switch_parse_vlan(d, buf);
 394         int j;
 395         __u16 val16;
 396
 397         if (c == NULL)
 398                 return -EINVAL;
 399
 400         for (j = 0; j < d->ports; j++) {
 401                 if ((c->untag | c->pvid) & (1 << j))
 402                         /* change default vlan tag */
 403                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 404         }
 405
 406         /* write config now */
 407
 408         if (robo.devid != ROBO_DEVICE_ID_5325) {
 409                 __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
 410                         (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
 411
 412                 robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
 413                 robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
 414                 robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
 415                 kfree(c);
 416                 return 0;
 417         }
 418
 419         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 420         if (robo.is_5350) {
 421                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 422                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 423                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 424         } else {
 425                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 426                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 427                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 428         }
 429
 430         kfree(c);
 431         return 0;
 432 }
 433
 434 #define set_switch(state) \
 435         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 436
 437 static int handle_enable_read(void *driver, char *buf, int nr)
 438 {
 439         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 440 }
 441
 442 static int handle_enable_write(void *driver, char *buf, int nr)
 443 {
 444         set_switch(buf[0] == '1');
 445
 446         return 0;
 447 }
 448
 449 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 450 {
 451         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 452 }
 453
 454 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 455 {
 456         int disable = ((buf[0] != '1') ? 1 : 0);
 457
 458         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 459                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 460         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 461                 (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
 462                 0) | (1 << 2) | (1 << 3)); /* RSV multicast */
 463
 464         if (robo.devid != ROBO_DEVICE_ID_5325)
 465                 return 0;
 466
 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         int j;
 479         __u16 val16;
 480
 481         /* disable switching */
 482         set_switch(0);
 483
 484         /* reset vlans */
 485         for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 486                 /* write config now */
 487                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 488                 if (robo.is_5350)
 489                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 490                 else
 491                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 492                 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
 493                                                             ROBO_VLAN_TABLE_ACCESS,
 494                              val16);
 495         }
 496
 497         /* reset ports to a known good state */
 498         for (j = 0; j < d->ports; j++) {
 499                 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
 500                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 501         }
 502
 503         /* enable switching */
 504         set_switch(1);
 505
 506         /* enable vlans */
 507         handle_enable_vlan_write(driver, "1", 0);
 508
 509         return 0;
 510 }
 511
 512 static int __init robo_init(void)
 513 {
 514         int notfound = 1;
 515         char *device;
 516
 517         device = strdup("ethX");
 518         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 519                 if (! switch_device_registered (device))
 520                         notfound = robo_probe(device);
 521         }
 522         device[3]--;
 523
 524         if (notfound) {
 525                 kfree(device);
 526                 return -ENODEV;
 527         } else {
 528                 static const switch_config cfg[] = {
 529                         {
 530                                 .name   = "enable",
 531                                 .read   = handle_enable_read,
 532                                 .write  = handle_enable_write
 533                         }, {
 534                                 .name   = "enable_vlan",
 535                                 .read   = handle_enable_vlan_read,
 536                                 .write  = handle_enable_vlan_write
 537                         }, {
 538                                 .name   = "reset",
 539                                 .read   = NULL,
 540                                 .write  = handle_reset
 541                         }, { NULL, },
 542                 };
 543                 static const switch_config vlan[] = {
 544                         {
 545                                 .name   = "ports",
 546                                 .read   = handle_vlan_port_read,
 547                                 .write  = handle_vlan_port_write
 548                         }, { NULL, },
 549                 };
 550                 switch_driver driver = {
 551                         .name                   = DRIVER_NAME,
 552                         .version                = DRIVER_VERSION,
 553                         .interface              = device,
 554                         .cpuport                = 5,
 555                         .ports                  = 6,
 556                         .vlans                  = 16,
 557                         .driver_handlers        = cfg,
 558                         .port_handlers          = NULL,
 559                         .vlan_handlers          = vlan,
 560                 };
 561                 if (robo.devid != ROBO_DEVICE_ID_5325) {
 562                         driver.ports = 9;
 563                         driver.cpuport = 8;
 564                 }
 565
 566                 return switch_register_driver(&driver);
 567         }
 568 }
 569
 570 static void __exit robo_exit(void)
 571 {
 572         switch_unregister_driver(DRIVER_NAME);
 573         if (robo.dev)
 574                 dev_put(robo.dev);
 575         kfree(robo.device);
 576 }
 577
 578
 579 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 580 MODULE_LICENSE("GPL");
 581
 582 module_init(robo_init);
 583 module_exit(robo_exit);