openwrt/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 char *device;
  55 static int use_et = 0;
  56 static int is_5350 = 0;
  57 static struct ifreq ifr;
  58 static struct net_device *dev;
  59 static unsigned char port[6] = { 0, 1, 2, 3, 4, 8 };
  60
  61 static int do_ioctl(int cmd, void *buf)
  62 {
  63         mm_segment_t old_fs = get_fs();
  64         int ret;
  65
  66         if (buf != NULL)
  67                 ifr.ifr_data = (caddr_t) buf;
  68
  69         set_fs(KERNEL_DS);
  70         ret = dev->do_ioctl(dev, &ifr, cmd);
  71         set_fs(old_fs);
  72
  73         return ret;
  74 }
  75
  76 static u16 mdio_read(__u16 phy_id, __u8 reg)
  77 {
  78         if (use_et) {
  79                 int args[2] = { reg };
  80
  81                 if (phy_id != ROBO_PHY_ADDR) {
  82                         printk(
  83                                 "Access to real 'phy' registers unavaliable.\n"
  84                                 "Upgrade kernel driver.\n");
  85
  86                         return 0xffff;
  87                 }
  88
  89
  90                 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
  91                         printk("[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
  92                         return 0xffff;
  93                 }
  94
  95                 return args[1];
  96         } else {
  97                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr.ifr_data;
  98                 mii->phy_id = phy_id;
  99                 mii->reg_num = reg;
 100
 101                 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
 102                         printk("[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
 103
 104                         return 0xffff;
 105                 }
 106
 107                 return mii->val_out;
 108         }
 109 }
 110
 111 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
 112 {
 113         if (use_et) {
 114                 int args[2] = { reg, val };
 115
 116                 if (phy_id != ROBO_PHY_ADDR) {
 117                         printk(
 118                                 "Access to real 'phy' registers unavaliable.\n"
 119                                 "Upgrade kernel driver.\n");
 120
 121                         return;
 122                 }
 123
 124                 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
 125                         printk("[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
 126                         return;
 127                 }
 128         } else {
 129                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&ifr.ifr_data;
 130
 131                 mii->phy_id = phy_id;
 132                 mii->reg_num = reg;
 133                 mii->val_in = val;
 134
 135                 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
 136                         printk("[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
 137                         return;
 138                 }
 139         }
 140 }
 141
 142 static int robo_reg(__u8 page, __u8 reg, __u8 op)
 143 {
 144         int i = 3;
 145
 146         /* set page number */
 147         mdio_write(ROBO_PHY_ADDR, REG_MII_PAGE,
 148                 (page << 8) | REG_MII_PAGE_ENABLE);
 149
 150         /* set register address */
 151         mdio_write(ROBO_PHY_ADDR, REG_MII_ADDR,
 152                 (reg << 8) | op);
 153
 154         /* check if operation completed */
 155         while (i--) {
 156                 if ((mdio_read(ROBO_PHY_ADDR, REG_MII_ADDR) & 3) == 0)
 157                         return 0;
 158         }
 159
 160         printk("[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
 161
 162         return 0;
 163 }
 164
 165 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 166 {
 167         int i;
 168
 169         robo_reg(page, reg, REG_MII_ADDR_READ);
 170
 171         for (i = 0; i < count; i++)
 172                 val[i] = mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + i);
 173 }
 174
 175 static __u16 robo_read16(__u8 page, __u8 reg)
 176 {
 177         robo_reg(page, reg, REG_MII_ADDR_READ);
 178
 179         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0);
 180 }
 181
 182 static __u32 robo_read32(__u8 page, __u8 reg)
 183 {
 184         robo_reg(page, reg, REG_MII_ADDR_READ);
 185
 186         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0) +
 187                 (mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + 1) << 16);
 188 }
 189
 190 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 191 {
 192         /* write data */
 193         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val16);
 194
 195         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 196 }
 197
 198 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 199 {
 200         /* write data */
 201         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val32 & 65535);
 202         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0 + 1, val32 >> 16);
 203
 204         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 205 }
 206
 207 /* checks that attached switch is 5325E/5350 */
 208 static int robo_vlan5350()
 209 {
 210         /* set vlan access id to 15 and read it back */
 211         __u16 val16 = 15;
 212         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 213
 214         /* 5365 will refuse this as it does not have this reg */
 215         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 216 }
 217
 218
 219
 220 static int robo_probe(char *devname)
 221 {
 222         struct ethtool_drvinfo info;
 223         int i;
 224         __u32 phyid;
 225
 226         printk("Probing device %s: ", devname);
 227         strcpy(ifr.ifr_name, devname);
 228
 229         if ((dev = dev_get_by_name(devname)) == NULL) {
 230                 printk("No such device\n");
 231                 return 1;
 232         }
 233
 234         info.cmd = ETHTOOL_GDRVINFO;
 235         if (do_ioctl(SIOCETHTOOL, (void *) &info) < 0) {
 236                 printk("SIOCETHTOOL: not supported\n");
 237                 return 1;
 238         }
 239
 240         /* try access using MII ioctls - get phy address */
 241         if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
 242                 use_et = 1;
 243         } else {
 244                 /* got phy address check for robo address */
 245                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr.ifr_data;
 246                 if (mii->phy_id != ROBO_PHY_ADDR) {
 247                         printk("Invalid phy address (%d)\n", mii->phy_id);
 248                         return 1;
 249                 }
 250         }
 251
 252         phyid = mdio_read(ROBO_PHY_ADDR, 0x2) |
 253                 (mdio_read(ROBO_PHY_ADDR, 0x3) << 16);
 254
 255         if (phyid == 0xffffffff || phyid == 0x55210022) {
 256                 printk("No Robo switch in managed mode found\n");
 257                 return 1;
 258         }
 259
 260         is_5350 = robo_vlan5350();
 261
 262         printk("found!\n");
 263         return 0;
 264 }
 265
 266
 267 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 268 {
 269         __u16 val16;
 270         int len = 0;
 271         int j;
 272
 273         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 274
 275         if (is_5350) {
 276                 u32 val32;
 277                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 278                 /* actual read */
 279                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 280                 if ((val32 & (1 << 20)) /* valid */) {
 281                         for (j = 0; j < 6; j++) {
 282                                 if (val32 & (1 << j)) {
 283                                         len += sprintf(buf + len, "%d", j);
 284                                         if (val32 & (1 << (j + 6))) {
 285                                                 if (j == 5) buf[len++] = 'u';
 286                                         } else {
 287                                                 buf[len++] = 't';
 288                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 289                                                         buf[len++] = '*';
 290                                         }
 291                                         buf[len++] = '\t';
 292                                 }
 293                         }
 294                         len += sprintf(buf + len, "\n");
 295                 }
 296         } else {
 297                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 298                 /* actual read */
 299                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 300                 if ((val16 & (1 << 14)) /* valid */) {
 301                         for (j = 0; j < 6; j++) {
 302                                 if (val16 & (1 << j)) {
 303                                         len += sprintf(buf + len, "%d", j);
 304                                         if (val16 & (1 << (j + 7))) {
 305                                                 if (j == 5) buf[len++] = 'u';
 306                                         } else {
 307                                                 buf[len++] = 't';
 308                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 309                                                         buf[len++] = '*';
 310                                         }
 311                                         buf[len++] = '\t';
 312                                 }
 313                         }
 314                         len += sprintf(buf + len, "\n");
 315                 }
 316         }
 317
 318         return len;
 319 }
 320
 321 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 322 {
 323         switch_driver *d = (switch_driver *) driver;
 324         switch_vlan_config *c = switch_parse_vlan(d, buf);
 325         int j;
 326         __u16 val16;
 327
 328         if (c == NULL)
 329                 return -EINVAL;
 330
 331         for (j = 0; j < d->ports; j++) {
 332                 if ((c->untag | c->pvid) & (1 << j))
 333                         /* change default vlan tag */
 334                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 335         }
 336
 337         /* write config now */
 338         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 339         if (is_5350) {
 340                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 341                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 342                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 343         } else {
 344                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 345                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 346                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 347         }
 348
 349         return 0;
 350 }
 351
 352 #define set_switch(state) \
 353         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 354
 355 static int handle_enable_read(void *driver, char *buf, int nr)
 356 {
 357         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 358 }
 359
 360 static int handle_enable_write(void *driver, char *buf, int nr)
 361 {
 362         set_switch(buf[0] == '1');
 363
 364         return 0;
 365 }
 366
 367 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 368 {
 369         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 370 }
 371
 372 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 373 {
 374         int disable = ((buf[0] != '1') ? 1 : 0);
 375
 376         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 377                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 378         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 379                 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
 380         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 381                 (1 << 6) /* drop invalid VID frames */);
 382         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 383                 (1 << 3) /* drop miss V table frames */);
 384
 385         return 0;
 386 }
 387
 388 static int handle_reset(void *driver, char *buf, int nr)
 389 {
 390         switch_driver *d = (switch_driver *) driver;
 391         switch_vlan_config *c = switch_parse_vlan(d, buf);
 392         int j;
 393         __u16 val16;
 394
 395         if (c == NULL)
 396                 return -EINVAL;
 397
 398         /* disable switching */
 399         set_switch(0);
 400
 401         /* reset vlans */
 402         for (j = 0; j <= (is_5350 ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 403                 /* write config now */
 404                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 405                 if (is_5350)
 406                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 407                 else
 408                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 409                 robo_write16(ROBO_VLAN_PAGE, (is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 : ROBO_VLAN_TABLE_ACCESS), val16);
 410         }
 411
 412         /* reset ports to a known good state */
 413         for (j = 0; j < d->ports; j++) {
 414                 robo_write16(ROBO_CTRL_PAGE, port[j], 0x0000);
 415                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 416         }
 417
 418         /* enable switching */
 419         set_switch(1);
 420
 421         /* enable vlans */
 422         handle_enable_vlan_write(driver, "1", 0);
 423
 424         return 0;
 425 }
 426
 427 static int __init robo_init()
 428 {
 429         int notfound = 1;
 430
 431         device = strdup("ethX");
 432         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 433                 notfound = robo_probe(device);
 434         }
 435         device[3]--;
 436
 437         if (notfound) {
 438                 kfree(device);
 439                 return -ENODEV;
 440         } else {
 441                 switch_config cfg[] = {
 442                         {"enable", handle_enable_read, handle_enable_write},
 443                         {"enable_vlan", handle_enable_vlan_read, handle_enable_vlan_write},
 444                         {"reset", NULL, handle_reset},
 445                         {NULL, NULL, NULL}
 446                 };
 447                 switch_config vlan[] = {
 448                         {"ports", handle_vlan_port_read, handle_vlan_port_write},
 449                         {NULL, NULL, NULL}
 450                 };
 451                 switch_driver driver = {
 452                         name: DRIVER_NAME,
 453                         version: DRIVER_VERSION,
 454                         interface: device,
 455                         cpuport: 5,
 456                         ports: 6,
 457                         vlans: 16,
 458                         driver_handlers: cfg,
 459                         port_handlers: NULL,
 460                         vlan_handlers: vlan,
 461                 };
 462
 463                 return switch_register_driver(&driver);
 464         }
 465 }
 466
 467 static void __exit robo_exit()
 468 {
 469         switch_unregister_driver(DRIVER_NAME);
 470         kfree(device);
 471 }
 472
 473
 474 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 475 MODULE_LICENSE("GPL");
 476
 477 module_init(robo_init);
 478 module_exit(robo_exit);