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