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         mii->phy_id = phy_id;
 100         mii->reg_num = reg;
 101
 102         if (do_ioctl(SIOCGMIIREG) < 0) {
 103                 printk(KERN_ERR PFX
 104                        "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
 105
 106                 return 0xffff;
 107         }
 108
 109         return mii->val_out;
 110 }
 111
 112 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 113 {
 114         struct mii_ioctl_data *mii = if_mii(&robo.ifr);
 115
 116         mii->phy_id = phy_id;
 117         mii->reg_num = reg;
 118         mii->val_in = val;
 119
 120         if (do_ioctl(SIOCSMIIREG) < 0) {
 121                 printk(KERN_ERR PFX
 122                        "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
 123                 return;
 124         }
 125 }
 126
 127 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 128 {
 129         int i = 3;
 130
 131         /* set page number */
 132         mdio_write(ROBO_PHY_ADDR, REG_MII_PAGE,
 133                 (page << 8) | REG_MII_PAGE_ENABLE);
 134
 135         /* set register address */
 136         mdio_write(ROBO_PHY_ADDR, REG_MII_ADDR,
 137                 (reg << 8) | op);
 138
 139         /* check if operation completed */
 140         while (i--) {
 141                 if ((mdio_read(ROBO_PHY_ADDR, REG_MII_ADDR) & 3) == 0)
 142                         return 0;
 143         }
 144
 145         printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 146
 147         return 0;
 148 }
 149
 150 /*
 151 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 152 {
 153         int i;
 154
 155         robo_reg(page, reg, REG_MII_ADDR_READ);
 156
 157         for (i = 0; i < count; i++)
 158                 val[i] = mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + i);
 159 }
 160 */
 161
 162 static __u16 robo_read16(__u8 page, __u8 reg)
 163 {
 164         robo_reg(page, reg, REG_MII_ADDR_READ);
 165
 166         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0);
 167 }
 168
 169 static __u32 robo_read32(__u8 page, __u8 reg)
 170 {
 171         robo_reg(page, reg, REG_MII_ADDR_READ);
 172
 173         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0) +
 174                 (mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + 1) << 16);
 175 }
 176
 177 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 178 {
 179         /* write data */
 180         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val16);
 181
 182         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 183 }
 184
 185 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 186 {
 187         /* write data */
 188         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val32 & 65535);
 189         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0 + 1, val32 >> 16);
 190
 191         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 192 }
 193
 194 /* checks that attached switch is 5325E/5350 */
 195 static int robo_vlan5350(void)
 196 {
 197         /* set vlan access id to 15 and read it back */
 198         __u16 val16 = 15;
 199         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 200
 201         /* 5365 will refuse this as it does not have this reg */
 202         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 203 }
 204
 205 static int robo_switch_enable(void)
 206 {
 207         unsigned int i, last_port;
 208         u16 val;
 209 #ifdef CONFIG_BCM47XX
 210         char buf[20];
 211 #endif
 212
 213         val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 214         if (!(val & (1 << 1))) {
 215                 /* Unmanaged mode */
 216                 val &= ~(1 << 0);
 217                 /* With forwarding */
 218                 val |= (1 << 1);
 219                 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
 220                 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 221                 if (!(val & (1 << 1))) {
 222                         printk("Failed to enable switch\n");
 223                         return -EBUSY;
 224                 }
 225
 226                 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
 227                                 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
 228                 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
 229                         robo_write16(ROBO_CTRL_PAGE, i, 0);
 230         }
 231
 232 #ifdef CONFIG_BCM47XX
 233         /* WAN port LED, except for Netgear WGT634U */
 234         if (nvram_getenv("nvram_type", buf, sizeof(buf)) >= 0) {
 235                 if (strcmp(buf, "cfe") != 0)
 236                         robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
 237         }
 238 #endif
 239         return 0;
 240 }
 241
 242 static void robo_switch_reset(void)
 243 {
 244         if ((robo.devid == ROBO_DEVICE_ID_5395) ||
 245             (robo.devid == ROBO_DEVICE_ID_5397) ||
 246             (robo.devid == ROBO_DEVICE_ID_5398)) {
 247                 /* Trigger a software reset. */
 248                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
 249                 mdelay(500);
 250                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
 251         }
 252 }
 253
 254 static int robo_probe(char *devname)
 255 {
 256         __u32 phyid;
 257         unsigned int i;
 258         int err = 1;
 259
 260         printk(KERN_INFO PFX "Probing device %s: ", devname);
 261         strcpy(robo.ifr.ifr_name, devname);
 262
 263         if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
 264                 printk("No such device\n");
 265                 return 1;
 266         }
 267
 268         robo.device = devname;
 269         for (i = 0; i < 5; i++)
 270                 robo.port[i] = i;
 271         robo.port[5] = 8;
 272
 273         /* try access using MII ioctls - get phy address */
 274         if (do_ioctl(SIOCGMIIPHY) < 0) {
 275                 printk("error while accessing MII phy registers with ioctls\n");
 276                 goto done;
 277         }
 278
 279         /* got phy address check for robo address */
 280         struct mii_ioctl_data *mii = if_mii(&robo.ifr);
 281         if ((mii->phy_id != ROBO_PHY_ADDR) &&
 282             (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
 283             (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
 284                 printk("Invalid phy address (%d)\n", mii->phy_id);
 285                 goto done;
 286         }
 287
 288         phyid = mdio_read(ROBO_PHY_ADDR, 0x2) |
 289                 (mdio_read(ROBO_PHY_ADDR, 0x3) << 16);
 290
 291         if (phyid == 0xffffffff || phyid == 0x55210022) {
 292                 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
 293                 goto done;
 294         }
 295
 296         /* Get the device ID */
 297         for (i = 0; i < 10; i++) {
 298                 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
 299                 if (robo.devid)
 300                         break;
 301                 udelay(10);
 302         }
 303         if (!robo.devid)
 304                 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
 305         robo.is_5350 = robo_vlan5350();
 306
 307         robo_switch_reset();
 308         err = robo_switch_enable();
 309         if (err)
 310                 goto done;
 311         err = 0;
 312
 313         printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
 314                 robo.is_5350 ? " It's a 5350." : "");
 315
 316 done:
 317         if (err) {
 318                 dev_put(robo.dev);
 319                 robo.dev = NULL;
 320         }
 321         return err;
 322 }
 323
 324
 325 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 326 {
 327         __u16 val16;
 328         int len = 0;
 329         int j;
 330
 331         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 332
 333         if (robo.is_5350) {
 334                 u32 val32;
 335                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 336                 /* actual read */
 337                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 338                 if ((val32 & (1 << 20)) /* valid */) {
 339                         for (j = 0; j < 6; j++) {
 340                                 if (val32 & (1 << j)) {
 341                                         len += sprintf(buf + len, "%d", j);
 342                                         if (val32 & (1 << (j + 6))) {
 343                                                 if (j == 5) buf[len++] = 'u';
 344                                         } else {
 345                                                 buf[len++] = 't';
 346                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 347                                                         buf[len++] = '*';
 348                                         }
 349                                         buf[len++] = '\t';
 350                                 }
 351                         }
 352                         len += sprintf(buf + len, "\n");
 353                 }
 354         } else {
 355                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 356                 /* actual read */
 357                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 358                 if ((val16 & (1 << 14)) /* valid */) {
 359                         for (j = 0; j < 6; j++) {
 360                                 if (val16 & (1 << j)) {
 361                                         len += sprintf(buf + len, "%d", j);
 362                                         if (val16 & (1 << (j + 7))) {
 363                                                 if (j == 5) buf[len++] = 'u';
 364                                         } else {
 365                                                 buf[len++] = 't';
 366                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 367                                                         buf[len++] = '*';
 368                                         }
 369                                         buf[len++] = '\t';
 370                                 }
 371                         }
 372                         len += sprintf(buf + len, "\n");
 373                 }
 374         }
 375
 376         buf[len] = '\0';
 377
 378         return len;
 379 }
 380
 381 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 382 {
 383         switch_driver *d = (switch_driver *) driver;
 384         switch_vlan_config *c = switch_parse_vlan(d, buf);
 385         int j;
 386         __u16 val16;
 387
 388         if (c == NULL)
 389                 return -EINVAL;
 390
 391         for (j = 0; j < d->ports; j++) {
 392                 if ((c->untag | c->pvid) & (1 << j))
 393                         /* change default vlan tag */
 394                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 395         }
 396
 397         /* write config now */
 398
 399         if (robo.devid != ROBO_DEVICE_ID_5325) {
 400                 __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
 401                         (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
 402
 403                 robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
 404                 robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
 405                 robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
 406                 kfree(c);
 407                 return 0;
 408         }
 409
 410         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 411         if (robo.is_5350) {
 412                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 413                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 414                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 415         } else {
 416                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 417                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 418                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 419         }
 420
 421         kfree(c);
 422         return 0;
 423 }
 424
 425 #define set_switch(state) \
 426         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 427
 428 static int handle_enable_read(void *driver, char *buf, int nr)
 429 {
 430         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 431 }
 432
 433 static int handle_enable_write(void *driver, char *buf, int nr)
 434 {
 435         set_switch(buf[0] == '1');
 436
 437         return 0;
 438 }
 439
 440 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 441 {
 442         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 443 }
 444
 445 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 446 {
 447         int disable = ((buf[0] != '1') ? 1 : 0);
 448
 449         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 450                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 451         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 452                 (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
 453                 0) | (1 << 2) | (1 << 3)); /* RSV multicast */
 454
 455         if (robo.devid != ROBO_DEVICE_ID_5325)
 456                 return 0;
 457
 458         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 459                 (1 << 6) /* drop invalid VID frames */);
 460         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 461                 (1 << 3) /* drop miss V table frames */);
 462
 463         return 0;
 464 }
 465
 466 static int handle_reset(void *driver, char *buf, int nr)
 467 {
 468         switch_driver *d = (switch_driver *) driver;
 469         int j;
 470         __u16 val16;
 471
 472         /* disable switching */
 473         set_switch(0);
 474
 475         /* reset vlans */
 476         for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 477                 /* write config now */
 478                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 479                 if (robo.is_5350)
 480                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 481                 else
 482                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 483                 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
 484                                                             ROBO_VLAN_TABLE_ACCESS,
 485                              val16);
 486         }
 487
 488         /* reset ports to a known good state */
 489         for (j = 0; j < d->ports; j++) {
 490                 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
 491                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 492         }
 493
 494         /* enable switching */
 495         set_switch(1);
 496
 497         /* enable vlans */
 498         handle_enable_vlan_write(driver, "1", 0);
 499
 500         return 0;
 501 }
 502
 503 static int __init robo_init(void)
 504 {
 505         int notfound = 1;
 506         char *device;
 507
 508         device = strdup("ethX");
 509         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 510                 if (! switch_device_registered (device))
 511                         notfound = robo_probe(device);
 512         }
 513         device[3]--;
 514
 515         if (notfound) {
 516                 kfree(device);
 517                 return -ENODEV;
 518         } else {
 519                 static const switch_config cfg[] = {
 520                         {
 521                                 .name   = "enable",
 522                                 .read   = handle_enable_read,
 523                                 .write  = handle_enable_write
 524                         }, {
 525                                 .name   = "enable_vlan",
 526                                 .read   = handle_enable_vlan_read,
 527                                 .write  = handle_enable_vlan_write
 528                         }, {
 529                                 .name   = "reset",
 530                                 .read   = NULL,
 531                                 .write  = handle_reset
 532                         }, { NULL, },
 533                 };
 534                 static const switch_config vlan[] = {
 535                         {
 536                                 .name   = "ports",
 537                                 .read   = handle_vlan_port_read,
 538                                 .write  = handle_vlan_port_write
 539                         }, { NULL, },
 540                 };
 541                 switch_driver driver = {
 542                         .name                   = DRIVER_NAME,
 543                         .version                = DRIVER_VERSION,
 544                         .interface              = device,
 545                         .cpuport                = 5,
 546                         .ports                  = 6,
 547                         .vlans                  = 16,
 548                         .driver_handlers        = cfg,
 549                         .port_handlers          = NULL,
 550                         .vlan_handlers          = vlan,
 551                 };
 552                 if (robo.devid != ROBO_DEVICE_ID_5325) {
 553                         driver.ports = 9;
 554                         driver.cpuport = 8;
 555                 }
 556
 557                 return switch_register_driver(&driver);
 558         }
 559 }
 560
 561 static void __exit robo_exit(void)
 562 {
 563         switch_unregister_driver(DRIVER_NAME);
 564         if (robo.dev)
 565                 dev_put(robo.dev);
 566         kfree(robo.device);
 567 }
 568
 569
 570 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 571 MODULE_LICENSE("GPL");
 572
 573 module_init(robo_init);
 574 module_exit(robo_exit);