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