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/autoconf.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 /*
 166 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
 167 {
 168         int i;
 169
 170         robo_reg(page, reg, REG_MII_ADDR_READ);
 171
 172         for (i = 0; i < count; i++)
 173                 val[i] = mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + i);
 174 }
 175 */
 176
 177 static __u16 robo_read16(__u8 page, __u8 reg)
 178 {
 179         robo_reg(page, reg, REG_MII_ADDR_READ);
 180
 181         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0);
 182 }
 183
 184 static __u32 robo_read32(__u8 page, __u8 reg)
 185 {
 186         robo_reg(page, reg, REG_MII_ADDR_READ);
 187
 188         return mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0) +
 189                 (mdio_read(ROBO_PHY_ADDR, REG_MII_DATA0 + 1) << 16);
 190 }
 191
 192 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
 193 {
 194         /* write data */
 195         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val16);
 196
 197         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 198 }
 199
 200 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
 201 {
 202         /* write data */
 203         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0, val32 & 65535);
 204         mdio_write(ROBO_PHY_ADDR, REG_MII_DATA0 + 1, val32 >> 16);
 205
 206         robo_reg(page, reg, REG_MII_ADDR_WRITE);
 207 }
 208
 209 /* checks that attached switch is 5325E/5350 */
 210 static int robo_vlan5350(void)
 211 {
 212         /* set vlan access id to 15 and read it back */
 213         __u16 val16 = 15;
 214         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 215
 216         /* 5365 will refuse this as it does not have this reg */
 217         return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
 218 }
 219
 220
 221
 222 static int robo_probe(char *devname)
 223 {
 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         /* try access using MII ioctls - get phy address */
 235         if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
 236                 use_et = 1;
 237         } else {
 238                 /* got phy address check for robo address */
 239                 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr.ifr_data;
 240                 if (mii->phy_id != ROBO_PHY_ADDR) {
 241                         printk("Invalid phy address (%d)\n", mii->phy_id);
 242                         return 1;
 243                 }
 244         }
 245
 246         phyid = mdio_read(ROBO_PHY_ADDR, 0x2) |
 247                 (mdio_read(ROBO_PHY_ADDR, 0x3) << 16);
 248
 249         if (phyid == 0xffffffff || phyid == 0x55210022) {
 250                 printk("No Robo switch in managed mode found\n");
 251                 return 1;
 252         }
 253
 254         is_5350 = robo_vlan5350();
 255
 256         printk("found!\n");
 257         return 0;
 258 }
 259
 260
 261 static int handle_vlan_port_read(void *driver, char *buf, int nr)
 262 {
 263         __u16 val16;
 264         int len = 0;
 265         int j;
 266
 267         val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
 268
 269         if (is_5350) {
 270                 u32 val32;
 271                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 272                 /* actual read */
 273                 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 274                 if ((val32 & (1 << 20)) /* valid */) {
 275                         for (j = 0; j < 6; j++) {
 276                                 if (val32 & (1 << j)) {
 277                                         len += sprintf(buf + len, "%d", j);
 278                                         if (val32 & (1 << (j + 6))) {
 279                                                 if (j == 5) buf[len++] = 'u';
 280                                         } else {
 281                                                 buf[len++] = 't';
 282                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 283                                                         buf[len++] = '*';
 284                                         }
 285                                         buf[len++] = '\t';
 286                                 }
 287                         }
 288                         len += sprintf(buf + len, "\n");
 289                 }
 290         } else {
 291                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 292                 /* actual read */
 293                 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
 294                 if ((val16 & (1 << 14)) /* valid */) {
 295                         for (j = 0; j < 6; j++) {
 296                                 if (val16 & (1 << j)) {
 297                                         len += sprintf(buf + len, "%d", j);
 298                                         if (val16 & (1 << (j + 7))) {
 299                                                 if (j == 5) buf[len++] = 'u';
 300                                         } else {
 301                                                 buf[len++] = 't';
 302                                                 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
 303                                                         buf[len++] = '*';
 304                                         }
 305                                         buf[len++] = '\t';
 306                                 }
 307                         }
 308                         len += sprintf(buf + len, "\n");
 309                 }
 310         }
 311
 312         buf[len] = '\0';
 313
 314         return len;
 315 }
 316
 317 static int handle_vlan_port_write(void *driver, char *buf, int nr)
 318 {
 319         switch_driver *d = (switch_driver *) driver;
 320         switch_vlan_config *c = switch_parse_vlan(d, buf);
 321         int j;
 322         __u16 val16;
 323
 324         if (c == NULL)
 325                 return -EINVAL;
 326
 327         for (j = 0; j < d->ports; j++) {
 328                 if ((c->untag | c->pvid) & (1 << j))
 329                         /* change default vlan tag */
 330                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
 331         }
 332
 333         /* write config now */
 334         val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 335         if (is_5350) {
 336                 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
 337                         (1 << 20) /* valid */ | (c->untag << 6) | c->port);
 338                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
 339         } else {
 340                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
 341                         (1 << 14)  /* valid */ | (c->untag << 7) | c->port);
 342                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
 343         }
 344
 345         return 0;
 346 }
 347
 348 #define set_switch(state) \
 349         robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
 350
 351 static int handle_enable_read(void *driver, char *buf, int nr)
 352 {
 353         return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
 354 }
 355
 356 static int handle_enable_write(void *driver, char *buf, int nr)
 357 {
 358         set_switch(buf[0] == '1');
 359
 360         return 0;
 361 }
 362
 363 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
 364 {
 365         return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
 366 }
 367
 368 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
 369 {
 370         int disable = ((buf[0] != '1') ? 1 : 0);
 371
 372         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
 373                 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
 374         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
 375                 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
 376         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
 377                 (1 << 6) /* drop invalid VID frames */);
 378         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
 379                 (1 << 3) /* drop miss V table frames */);
 380
 381         return 0;
 382 }
 383
 384 static int handle_reset(void *driver, char *buf, int nr)
 385 {
 386         switch_driver *d = (switch_driver *) driver;
 387         switch_vlan_config *c = switch_parse_vlan(d, buf);
 388         int j;
 389         __u16 val16;
 390
 391         if (c == NULL)
 392                 return -EINVAL;
 393
 394         /* disable switching */
 395         set_switch(0);
 396
 397         /* reset vlans */
 398         for (j = 0; j <= (is_5350 ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
 399                 /* write config now */
 400                 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
 401                 if (is_5350)
 402                         robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
 403                 else
 404                         robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
 405                 robo_write16(ROBO_VLAN_PAGE, (is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 : ROBO_VLAN_TABLE_ACCESS), val16);
 406         }
 407
 408         /* reset ports to a known good state */
 409         for (j = 0; j < d->ports; j++) {
 410                 robo_write16(ROBO_CTRL_PAGE, port[j], 0x0000);
 411                 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
 412         }
 413
 414         /* enable switching */
 415         set_switch(1);
 416
 417         /* enable vlans */
 418         handle_enable_vlan_write(driver, "1", 0);
 419
 420         return 0;
 421 }
 422
 423 static int __init robo_init(void)
 424 {
 425         int notfound = 1;
 426
 427         device = strdup("ethX");
 428         for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
 429                 notfound = robo_probe(device);
 430         }
 431         device[3]--;
 432
 433         if (notfound) {
 434                 kfree(device);
 435                 return -ENODEV;
 436         } else {
 437                 switch_config cfg[] = {
 438                         {"enable", handle_enable_read, handle_enable_write},
 439                         {"enable_vlan", handle_enable_vlan_read, handle_enable_vlan_write},
 440                         {"reset", NULL, handle_reset},
 441                         {NULL, NULL, NULL}
 442                 };
 443                 switch_config vlan[] = {
 444                         {"ports", handle_vlan_port_read, handle_vlan_port_write},
 445                         {NULL, NULL, NULL}
 446                 };
 447                 switch_driver driver = {
 448                         name: DRIVER_NAME,
 449                         version: DRIVER_VERSION,
 450                         interface: device,
 451                         cpuport: 5,
 452                         ports: 6,
 453                         vlans: 16,
 454                         driver_handlers: cfg,
 455                         port_handlers: NULL,
 456                         vlan_handlers: vlan,
 457                 };
 458
 459                 return switch_register_driver(&driver);
 460         }
 461 }
 462
 463 static void __exit robo_exit(void)
 464 {
 465         switch_unregister_driver(DRIVER_NAME);
 466         kfree(device);
 467 }
 468
 469
 470 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 471 MODULE_LICENSE("GPL");
 472
 473 module_init(robo_init);
 474 module_exit(robo_exit);