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