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 #define ROBO_PHY_ADDR_BCM63XX   0x00    /* BCM63XX PHY address */
  45
  46 /* MII registers */
  47 #define REG_MII_PAGE    0x10    /* MII Page register */
  48 #define REG_MII_ADDR    0x11    /* MII Address register */
  49 #define REG_MII_DATA0   0x18    /* MII Data register 0 */
  50
  51 #define REG_MII_PAGE_ENABLE     1
  52 #define REG_MII_ADDR_WRITE      1
  53 #define REG_MII_ADDR_READ       2
  54
  55 /* Robo device ID register (in ROBO_MGMT_PAGE) */
  56 #define ROBO_DEVICE_ID          0x30
  57 #define  ROBO_DEVICE_ID_5325    0x25 /* Faked */
  58 #define  ROBO_DEVICE_ID_5395    0x95
  59 #define  ROBO_DEVICE_ID_5397    0x97
  60 #define  ROBO_DEVICE_ID_5398    0x98
  61
  62 /* Private et.o ioctls */
  63 #define SIOCGETCPHYRD           (SIOCDEVPRIVATE + 9)
  64 #define SIOCSETCPHYWR           (SIOCDEVPRIVATE + 10)
  65
  66 /* linux 2.4 does not have 'bool' */
  67 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
  68 #define bool int
  69 #endif
  70
  71 /* Only available on brcm-2.4/brcm47xx */
  72 #ifdef BROADCOM
  73 extern char *nvram_get(const char *name);
  74 #define getvar(str) (nvram_get(str)?:"")
  75 #else
  76 #define getvar(str) NULL
  77 #endif
  78
  79 /* Data structure for a Roboswitch device. */
  80 struct robo_switch {
  81         char *device;                   /* The device name string (ethX) */
  82         u16 devid;                      /* ROBO_DEVICE_ID_53xx */
  83         bool use_et;
  84         bool is_5350;
  85         u8 phy_addr;                    /* PHY address of the device */
  86         struct ifreq ifr;
  87         struct net_device *dev;
  88         unsigned char port[6];
  89 };
  90
  91 /* Currently we can only have one device in the system. */
  92 static struct robo_switch robo;
  93
  94
  95 static int do_ioctl(int cmd, void *buf)
  96 {
  97         mm_segment_t old_fs = get_fs();
  98         int ret;
  99
 100         if (buf != NULL)
 101                 robo.ifr.ifr_data = (caddr_t) buf;
 102
 103         set_fs(KERNEL_DS);
 104         ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
 105         set_fs(old_fs);
 106
 107         return ret;
 108 }
 109
 110 static u16 mdio_read(__u16 phy_id, __u8 reg)
 111 {
 112         if (robo.use_et) {
 113                 int args[2] = { reg };
 114
 115                 if (phy_id != robo.phy_addr) {
 116                         printk(KERN_ERR PFX
 117                                 "Access to real 'phy' registers unavaliable.\n"
 118                                 "Upgrade kernel driver.\n");
 119
 120                         return 0xffff;
 121                 }
 122
 123
 124                 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
 125                         printk(KERN_ERR PFX
 126                                "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
 127                         return 0xffff;
 128                 }
 129
 130                 return args[1];
 131         } else {
 132                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
 133                 mii->phy_id = phy_id;
 134                 mii->reg_num = reg;
 135
 136                 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
 137                         printk(KERN_ERR PFX
 138                                "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
 139
 140                         return 0xffff;
 141                 }
 142
 143                 return mii->val_out;
 144         }
 145 }
 146
 147 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 148 {
 149         if (robo.use_et) {
 150                 int args[2] = { reg, val };
 151
 152                 if (phy_id != robo.phy_addr) {
 153                         printk(KERN_ERR PFX
 154                                 "Access to real 'phy' registers unavaliable.\n"
 155                                 "Upgrade kernel driver.\n");
 156
 157                         return;
 158                 }
 159
 160                 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
 161                         printk(KERN_ERR PFX
 162                                "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
 163                         return;
 164                 }
 165         } else {
 166                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
 167
 168                 mii->phy_id = phy_id;
 169                 mii->reg_num = reg;
 170                 mii->val_in = val;
 171
 172                 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
 173                         printk(KERN_ERR PFX
 174                                "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
 175                         return;
 176                 }
 177         }
 178 }
 179
 180 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 181 {
 182         int i = 3;
 183
 184         /* set page number */
 185         mdio_write(robo.phy_addr, REG_MII_PAGE,
 186                 (page << 8) | REG_MII_PAGE_ENABLE);
 187
 188         /* set register address */
 189         mdio_write(robo.phy_addr, REG_MII_ADDR,
 190                 (reg << 8) | op);
 191
 192         /* check if operation completed */
 193         while (i--) {
 194                 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
 195                         return 0;
 196         }
 197
 198         printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 199
 200         return 0;
 201 }
 202
 203 /*
 204 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 205 {
 206         int i;
 207
 208         robo_reg(page, reg, REG_MII_ADDR_READ);
 209
 210         for (i = 0; i < count; i++)
 211                 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
 212 }
 213 */
 214
 215 static __u16 robo_read16(__u8 page, __u8 reg)
 216 {
 217         robo_reg(page, reg, REG_MII_ADDR_READ);
 218
 219         return mdio_read(robo.phy_addr, REG_MII_DATA0);
 220 }
 221
 222 static __u32 robo_read32(__u8 page, __u8 reg)
 223 {
 224         robo_reg(page, reg, REG_MII_ADDR_READ);
 225
 226         return mdio_read(robo.phy_addr, REG_MII_DATA0) +
 227                 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
 228 }
 229
 230 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 231 {
 232         /* write data */
 233         mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
 234
 235         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 236 }
 237
 238 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 239 {
 240         /* write data */
 241         mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
 242         mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
 243
 244         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 245 }
 246
 247 /* checks that attached switch is 5325E/5350 */
 248 static int robo_vlan5350(void)
 249 {
 250         /* set vlan access id to 15 and read it back */
 251         __u16 val16 = 15;
 252         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 253
 254         /* 5365 will refuse this as it does not have this reg */
 255         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 256 }
 257
 258 static int robo_switch_enable(void)
 259 {
 260         unsigned int i, last_port;
 261         u16 val;
 262
 263         val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 264         if (!(val & (1 << 1))) {
 265                 /* Unmanaged mode */
 266                 val &= ~(1 << 0);
 267                 /* With forwarding */
 268                 val |= (1 << 1);
 269                 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
 270                 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
 271                 if (!(val & (1 << 1))) {
 272                         printk("Failed to enable switch\n");
 273                         return -EBUSY;
 274                 }
 275
 276                 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
 277                                 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
 278                 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
 279                         robo_write16(ROBO_CTRL_PAGE, i, 0);
 280         }
 281
 282         /* WAN port LED, except for Netgear WGT634U */
 283         if (strcmp(getvar("nvram_type"), "cfe") != 0)
 284                 robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
 285
 286         return 0;
 287 }
 288
 289 static void robo_switch_reset(void)
 290 {
 291         if ((robo.devid == ROBO_DEVICE_ID_5395) ||
 292             (robo.devid == ROBO_DEVICE_ID_5397) ||
 293             (robo.devid == ROBO_DEVICE_ID_5398)) {
 294                 /* Trigger a software reset. */
 295                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
 296                 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
 297         }
 298 }
 299
 300 static int robo_probe(char *devname)
 301 {
 302         __u32 phyid;
 303         unsigned int i;
 304         int err;
 305
 306         printk(KERN_INFO PFX "Probing device %s: ", devname);
 307         strcpy(robo.ifr.ifr_name, devname);
 308
 309 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
 310         if ((robo.dev = dev_get_by_name(devname)) == NULL) {
 311 #else
 312         if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
 313 #endif
 314                 printk("No such device\n");
 315                 return 1;
 316         }
 317
 318         robo.device = devname;
 319         for (i = 0; i < 5; i++)
 320                 robo.port[i] = i;
 321         robo.port[5] = 8;
 322
 323         /* try access using MII ioctls - get phy address */
 324         if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
 325                 robo.use_et = 1;
 326                 robo.phy_addr = ROBO_PHY_ADDR;
 327         } else {
 328                 /* got phy address check for robo address */
 329                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
 330                 if ((mii->phy_id != ROBO_PHY_ADDR) &&
 331                     (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
 332                     (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
 333                         printk("Invalid phy address (%d)\n", mii->phy_id);
 334                         return 1;
 335                 }
 336                 robo.use_et = 0;
 337                 /* The robo has a fixed PHY address that is different from the
 338                  * Tigon3 and BCM63xx PHY address. */
 339                 robo.phy_addr = ROBO_PHY_ADDR;
 340         }
 341
 342         phyid = mdio_read(robo.phy_addr, 0x2) |
 343                 (mdio_read(robo.phy_addr, 0x3) << 16);
 344
 345         if (phyid == 0xffffffff || phyid == 0x55210022) {
 346                 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
 347                 return 1;
 348         }
 349
 350         /* Get the device ID */
 351         for (i = 0; i < 10; i++) {
 352                 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
 353                 if (robo.devid)
 354                         break;
 355                 udelay(10);
 356         }
 357         if (!robo.devid)
 358                 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
 359         robo.is_5350 = robo_vlan5350();
 360
 361         robo_switch_reset();
 362         err = robo_switch_enable();
 363         if (err)
 364                 return err;
 365
 366         printk("found!\n");
 367         return 0;
 368 }
 369
 370
 371 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 372 {
 373         __u16 val16;
 374         int len = 0;
 375         int j;
 376
 377         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 378
 379         if (robo.is_5350) {
 380                 u32 val32;
 381                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 382                 /* actual read */
 383                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 384                 if ((val32 & (1 << 20)) /* valid */) {
 385                         for (j = 0; j < 6; j++) {
 386                                 if (val32 & (1 << j)) {
 387                                         len += sprintf(buf + len, "%d", j);
 388                                         if (val32 & (1 << (j + 6))) {
 389                                                 if (j == 5) buf[len++] = 'u';
 390                                         } else {
 391                                                 buf[len++] = 't';
 392                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 393                                                         buf[len++] = '*';
 394                                         }
 395                                         buf[len++] = '\t';
 396                                 }
 397                         }
 398                         len += sprintf(buf + len, "\n");
 399                 }
 400         } else {
 401                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 402                 /* actual read */
 403                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 404                 if ((val16 & (1 << 14)) /* valid */) {
 405                         for (j = 0; j < 6; j++) {
 406                                 if (val16 & (1 << j)) {
 407                                         len += sprintf(buf + len, "%d", j);
 408                                         if (val16 & (1 << (j + 7))) {
 409                                                 if (j == 5) buf[len++] = 'u';
 410                                         } else {
 411                                                 buf[len++] = 't';
 412                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 413                                                         buf[len++] = '*';
 414                                         }
 415                                         buf[len++] = '\t';
 416                                 }
 417                         }
 418                         len += sprintf(buf + len, "\n");
 419                 }
 420         }
 421
 422         buf[len] = '\0';
 423
 424         return len;
 425 }
 426
 427 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 428 {
 429         switch_driver *d = (switch_driver *) driver;
 430         switch_vlan_config *c = switch_parse_vlan(d, buf);
 431         int j;
 432         __u16 val16;
 433
 434         if (c == NULL)
 435                 return -EINVAL;
 436
 437         for (j = 0; j < d->ports; j++) {
 438                 if ((c->untag | c->pvid) & (1 << j))
 439                         /* change default vlan tag */
 440                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 441         }
 442
 443         /* write config now */
 444         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 445         if (robo.is_5350) {
 446                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 447                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 448                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 449         } else {
 450                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 451                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 452                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 453         }
 454
 455         return 0;
 456 }
 457
 458 #define set_switch(state) \
 459         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 460
 461 static int handle_enable_read(void *driver, char *buf, int nr)
 462 {
 463         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 464 }
 465
 466 static int handle_enable_write(void *driver, char *buf, int nr)
 467 {
 468         set_switch(buf[0] == '1');
 469
 470         return 0;
 471 }
 472
 473 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 474 {
 475         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 476 }
 477
 478 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 479 {
 480         int disable = ((buf[0] != '1') ? 1 : 0);
 481
 482         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 483                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 484         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 485                 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
 486         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 487                 (1 << 6) /* drop invalid VID frames */);
 488         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 489                 (1 << 3) /* drop miss V table frames */);
 490
 491         return 0;
 492 }
 493
 494 static int handle_reset(void *driver, char *buf, int nr)
 495 {
 496         switch_driver *d = (switch_driver *) driver;
 497         switch_vlan_config *c = switch_parse_vlan(d, buf);
 498         int j;
 499         __u16 val16;
 500
 501         if (c == NULL)
 502                 return -EINVAL;
 503
 504         /* disable switching */
 505         set_switch(0);
 506
 507         /* reset vlans */
 508         for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 509                 /* write config now */
 510                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 511                 if (robo.is_5350)
 512                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 513                 else
 514                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 515                 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
 516                                                             ROBO_VLAN_TABLE_ACCESS,
 517                              val16);
 518         }
 519
 520         /* reset ports to a known good state */
 521         for (j = 0; j < d->ports; j++) {
 522                 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
 523                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 524         }
 525
 526         /* enable switching */
 527         set_switch(1);
 528
 529         /* enable vlans */
 530         handle_enable_vlan_write(driver, "1", 0);
 531
 532         return 0;
 533 }
 534
 535 static int __init robo_init(void)
 536 {
 537         int notfound = 1;
 538         char *device;
 539
 540         device = strdup("ethX");
 541         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 542                 if (! switch_device_registered (device))
 543                         notfound = robo_probe(device);
 544         }
 545         device[3]--;
 546
 547         if (notfound) {
 548                 kfree(device);
 549                 return -ENODEV;
 550         } else {
 551                 static const switch_config cfg[] = {
 552                         {
 553                                 .name   = "enable",
 554                                 .read   = handle_enable_read,
 555                                 .write  = handle_enable_write
 556                         }, {
 557                                 .name   = "enable_vlan",
 558                                 .read   = handle_enable_vlan_read,
 559                                 .write  = handle_enable_vlan_write
 560                         }, {
 561                                 .name   = "reset",
 562                                 .read   = NULL,
 563                                 .write  = handle_reset
 564                         }, { NULL, },
 565                 };
 566                 static const switch_config vlan[] = {
 567                         {
 568                                 .name   = "ports",
 569                                 .read   = handle_vlan_port_read,
 570                                 .write  = handle_vlan_port_write
 571                         }, { NULL, },
 572                 };
 573                 switch_driver driver = {
 574                         .name                   = DRIVER_NAME,
 575                         .version                = DRIVER_VERSION,
 576                         .interface              = device,
 577                         .cpuport                = 5,
 578                         .ports                  = 6,
 579                         .vlans                  = 16,
 580                         .driver_handlers        = cfg,
 581                         .port_handlers          = NULL,
 582                         .vlan_handlers          = vlan,
 583                 };
 584
 585                 return switch_register_driver(&driver);
 586         }
 587 }
 588
 589 static void __exit robo_exit(void)
 590 {
 591         switch_unregister_driver(DRIVER_NAME);
 592         kfree(robo.device);
 593 }
 594
 595
 596 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 597 MODULE_LICENSE("GPL");
 598
 599 module_init(robo_init);
 600 module_exit(robo_exit);