target/linux/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  * Based on 'robocfg' by Oleg I. Vdovikin
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301, USA.
  21  */
  22
  23 #include <linux/config.h>
  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 <asm/uaccess.h>
  32
  33 #include "switch-core.h"
  34 #include "etc53xx.h"
  35
  36 #define DRIVER_NAME             "bcm53xx"
  37 #define DRIVER_VERSION  "0.01"
  38
  39 #define ROBO_PHY_ADDR   0x1E    /* robo switch phy address */
  40
  41 /* MII registers */
  42 #define REG_MII_PAGE    0x10    /* MII Page register */
  43 #define REG_MII_ADDR    0x11    /* MII Address register */
  44 #define REG_MII_DATA0   0x18    /* MII Data register 0 */
  45
  46 #define REG_MII_PAGE_ENABLE     1
  47 #define REG_MII_ADDR_WRITE      1
  48 #define REG_MII_ADDR_READ       2
  49
  50 /* Private et.o ioctls */
  51 #define SIOCGETCPHYRD           (SIOCDEVPRIVATE + 9)
  52 #define SIOCSETCPHYWR           (SIOCDEVPRIVATE + 10)
  53
  54 static int use_et = 0;
  55 static int is_5350 = 0;
  56 static struct ifreq ifr;
  57 static struct net_device *dev;
  58 static unsigned char port[6] = { 0, 1, 2, 3, 4, 8 };
  59
  60 static int do_ioctl(int cmd, void *buf)
  61 {
  62         mm_segment_t old_fs = get_fs();
  63         int ret;
  64
  65         if (buf != NULL)
  66                 ifr.ifr_data = (caddr_t) buf;
  67
  68         set_fs(KERNEL_DS);
  69         ret = dev->do_ioctl(dev, &ifr, cmd);
  70         set_fs(old_fs);
  71
  72         return ret;
  73 }
  74
  75 static u16 mdio_read(__u16 phy_id, __u8 reg)
  76 {
  77         if (use_et) {
  78                 int args[2] = { reg };
  79
  80                 if (phy_id != ROBO_PHY_ADDR) {
  81                         printk(
  82                                 "Access to real 'phy' registers unavaliable.\n"
  83                                 "Upgrade kernel driver.\n");
  84
  85                         return 0xffff;
  86                 }
  87
  88
  89                 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
  90                         printk("[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
  91                         return 0xffff;
  92                 }
  93
  94                 return args[1];
  95         } else {
  96                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr.ifr_data;
  97                 mii->phy_id = phy_id;
  98                 mii->reg_num = reg;
  99
 100                 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
 101                         printk("[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
 102
 103                         return 0xffff;
 104                 }
 105
 106                 return mii->val_out;
 107         }
 108 }
 109
 110 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 111 {
 112         if (use_et) {
 113                 int args[2] = { reg, val };
 114
 115                 if (phy_id != ROBO_PHY_ADDR) {
 116                         printk(
 117                                 "Access to real 'phy' registers unavaliable.\n"
 118                                 "Upgrade kernel driver.\n");
 119
 120                         return;
 121                 }
 122
 123                 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
 124                         printk("[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
 125                         return;
 126                 }
 127         } else {
 128                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&ifr.ifr_data;
 129
 130                 mii->phy_id = phy_id;
 131                 mii->reg_num = reg;
 132                 mii->val_in = val;
 133
 134                 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
 135                         printk("[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
 136                         return;
 137                 }
 138         }
 139 }
 140
 141 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 142 {
 143         int i = 3;
 144
 145         /* set page number */
 146         mdio_write(ROBO_PHY_ADDR, REG_MII_PAGE,
 147                 (page << 8) | REG_MII_PAGE_ENABLE);
 148
 149         /* set register address */
 150         mdio_write(ROBO_PHY_ADDR, REG_MII_ADDR,
 151                 (reg << 8) | op);
 152
 153         /* check if operation completed */
 154         while (i--) {
 155                 if ((mdio_read(ROBO_PHY_ADDR, REG_MII_ADDR) & 3) == 0)
 156                         return 0;
 157         }
 158
 159         printk("[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 160
 161         return 0;
 162 }
 163
 164 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 165 {
 166         int i;
 167
 168         robo_reg(page, reg, REG_MII_ADDR_READ);
 169
 170         for (i = 0; i < count; i++)
 171                 val[i] = mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + i);
 172 }
 173
 174 static __u16 robo_read16(__u8 page, __u8 reg)
 175 {
 176         robo_reg(page, reg, REG_MII_ADDR_READ);
 177
 178         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0);
 179 }
 180
 181 static __u32 robo_read32(__u8 page, __u8 reg)
 182 {
 183         robo_reg(page, reg, REG_MII_ADDR_READ);
 184
 185         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0) +
 186                 (mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + 1) << 16);
 187 }
 188
 189 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 190 {
 191         /* write data */
 192         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val16);
 193
 194         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 195 }
 196
 197 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 198 {
 199         /* write data */
 200         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val32 & 65535);
 201         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0 + 1, val32 >> 16);
 202
 203         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 204 }
 205
 206 /* checks that attached switch is 5325E/5350 */
 207 static int robo_vlan5350()
 208 {
 209         /* set vlan access id to 15 and read it back */
 210         __u16 val16 = 15;
 211         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 212
 213         /* 5365 will refuse this as it does not have this reg */
 214         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 215 }
 216
 217
 218
 219 static int robo_probe(char *devname)
 220 {
 221         struct ethtool_drvinfo info;
 222         int i;
 223         __u32 phyid;
 224
 225         printk("Probing device %s: ", devname);
 226         strcpy(ifr.ifr_name, devname);
 227
 228         if ((dev = dev_get_by_name(devname)) == NULL) {
 229                 printk("No such device\n");
 230                 return 1;
 231         }
 232
 233         info.cmd = ETHTOOL_GDRVINFO;
 234         if (do_ioctl(SIOCETHTOOL, (void *) &info) < 0) {
 235                 printk("SIOCETHTOOL: not supported\n");
 236                 return 1;
 237         }
 238
 239         /* try access using MII ioctls - get phy address */
 240         if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
 241                 use_et = 1;
 242         } else {
 243                 /* got phy address check for robo address */
 244                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr.ifr_data;
 245                 if (mii->phy_id != ROBO_PHY_ADDR) {
 246                         printk("Invalid phy address (%d)\n", mii->phy_id);
 247                         return 1;
 248                 }
 249         }
 250
 251         phyid = mdio_read(ROBO_PHY_ADDR, 0x2) |
 252                 (mdio_read(ROBO_PHY_ADDR, 0x3) << 16);
 253
 254         if (phyid == 0xffffffff || phyid == 0x55210022) {
 255                 printk("No Robo switch in managed mode found\n");
 256                 return 1;
 257         }
 258
 259         is_5350 = robo_vlan5350();
 260
 261         printk("found!\n");
 262         return 0;
 263 }
 264
 265
 266 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 267 {
 268         __u16 val16;
 269         int len = 0;
 270         int j;
 271
 272         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 273
 274         if (is_5350) {
 275                 u32 val32;
 276                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 277                 /* actual read */
 278                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 279                 if ((val32 & (1 << 20)) /* valid */) {
 280                         for (j = 0; j < 6; j++) {
 281                                 if (val32 & (1 << j)) {
 282                                         len += sprintf(buf + len, "%d", j);
 283                                         if (val32 & (1 << (j + 6))) {
 284                                                 if (j == 5) buf[len++] = 'u';
 285                                         } else {
 286                                                 buf[len++] = 't';
 287                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 288                                                         buf[len++] = '*';
 289                                         }
 290                                         buf[len++] = '\t';
 291                                 }
 292                         }
 293                         len += sprintf(buf + len, "\n");
 294                 }
 295         } else {
 296                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 297                 /* actual read */
 298                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 299                 if ((val16 & (1 << 14)) /* valid */) {
 300                         for (j = 0; j < 6; j++) {
 301                                 if (val16 & (1 << j)) {
 302                                         len += sprintf(buf + len, "%d", j);
 303                                         if (val16 & (1 << (j + 7))) {
 304                                                 if (j == 5) buf[len++] = 'u';
 305                                         } else {
 306                                                 buf[len++] = 't';
 307                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 308                                                         buf[len++] = '*';
 309                                         }
 310                                         buf[len++] = '\t';
 311                                 }
 312                         }
 313                         len += sprintf(buf + len, "\n");
 314                 }
 315         }
 316
 317         return len;
 318 }
 319
 320 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 321 {
 322         switch_driver *d = (switch_driver *) driver;
 323         switch_vlan_config *c = switch_parse_vlan(d, buf);
 324         int j;
 325         __u16 val16;
 326
 327         if (c == NULL)
 328                 return -EINVAL;
 329
 330         for (j = 0; j < d->ports; j++) {
 331                 if ((c->untag | c->pvid) & (1 << j))
 332                         /* change default vlan tag */
 333                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 334         }
 335
 336         /* write config now */
 337         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 338         if (is_5350) {
 339                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 340                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 341                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 342         } else {
 343                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 344                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 345                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 346         }
 347
 348         return 0;
 349 }
 350
 351 #define set_switch(state) \
 352         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 353
 354 static int handle_enable_read(void *driver, char *buf, int nr)
 355 {
 356         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 357 }
 358
 359 static int handle_enable_write(void *driver, char *buf, int nr)
 360 {
 361         set_switch(buf[0] == '1');
 362
 363         return 0;
 364 }
 365
 366 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 367 {
 368         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 369 }
 370
 371 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 372 {
 373         int disable = ((buf[0] != '1') ? 1 : 0);
 374
 375         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 376                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 377         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 378                 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
 379         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 380                 (1 << 6) /* drop invalid VID frames */);
 381         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 382                 (1 << 3) /* drop miss V table frames */);
 383
 384         return 0;
 385 }
 386
 387 static int handle_reset(void *driver, char *buf, int nr)
 388 {
 389         switch_driver *d = (switch_driver *) driver;
 390         switch_vlan_config *c = switch_parse_vlan(d, buf);
 391         int j;
 392         __u16 val16;
 393
 394         if (c == NULL)
 395                 return -EINVAL;
 396
 397         /* disable switching */
 398         set_switch(0);
 399
 400         /* reset vlans */
 401         for (j = 0; j <= (is_5350 ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 402                 /* write config now */
 403                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 404                 if (is_5350)
 405                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 406                 else
 407                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 408                 robo_write16(ROBO_VLAN_PAGE, (is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 : ROBO_VLAN_TABLE_ACCESS), val16);
 409         }
 410
 411         /* reset ports to a known good state */
 412         for (j = 0; j < d->ports; j++) {
 413                 robo_write16(ROBO_CTRL_PAGE, port[j], 0x0000);
 414                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 415         }
 416
 417         /* enable switching */
 418         set_switch(1);
 419
 420         /* enable vlans */
 421         handle_enable_vlan_write(driver, "1", 0);
 422
 423         return 0;
 424 }
 425
 426 static int __init robo_init()
 427 {
 428         char *device = "ethX";
 429         int notfound = 1;
 430
 431         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 432                 notfound = robo_probe(device);
 433         }
 434         device[3]--;
 435
 436         if (notfound)
 437                 return -ENODEV;
 438         else {
 439                 switch_config cfg[] = {
 440                         {"enable", handle_enable_read, handle_enable_write},
 441                         {"enable_vlan", handle_enable_vlan_read, handle_enable_vlan_write},
 442                         {"reset", NULL, handle_reset},
 443                         {NULL, NULL, NULL}
 444                 };
 445                 switch_config vlan[] = {
 446                         {"ports", handle_vlan_port_read, handle_vlan_port_write},
 447                         {NULL, NULL, NULL}
 448                 };
 449                 switch_driver driver = {
 450                         name: DRIVER_NAME,
 451                         version: DRIVER_VERSION,
 452                         interface: device,
 453                         cpuport: 5,
 454                         ports: 6,
 455                         vlans: 16,
 456                         driver_handlers: cfg,
 457                         port_handlers: NULL,
 458                         vlan_handlers: vlan,
 459                 };
 460
 461                 return switch_register_driver(&driver);
 462         }
 463 }
 464
 465 static void __exit robo_exit()
 466 {
 467         switch_unregister_driver(DRIVER_NAME);
 468 }
 469
 470
 471 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 472 MODULE_LICENSE("GPL");
 473
 474 module_init(robo_init);
 475 module_exit(robo_exit);