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[openwrt.git] / 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/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 <linux/delay.h>
32 #include <asm/uaccess.h>
33
34 #include "switch-core.h"
35 #include "etc53xx.h"
36
37 #define DRIVER_NAME "bcm53xx"
38 #define DRIVER_VERSION "0.02"
39 #define PFX "roboswitch: "
40
41 #define ROBO_PHY_ADDR 0x1E /* robo switch phy address */
42 #define ROBO_PHY_ADDR_TG3 0x01 /* Tigon3 PHY address */
43 #define ROBO_PHY_ADDR_BCM63XX 0x00 /* BCM63XX 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 #define ROBO_DEVICE_ID_53115 0x3115
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 /* Only available on brcm-2.4/brcm47xx */
72 #ifdef BROADCOM
73 extern char *nvram_get(const char *name);
74 #define getvar(str) (nvram_get(str)?:"")
75 #else
76 #define getvar(str) ""
77 #endif
78
79 /* Data structure for a Roboswitch device. */
80 struct robo_switch {
81 char *device; /* The device name string (ethX) */
82 u16 devid; /* ROBO_DEVICE_ID_53xx */
83 bool use_et;
84 bool is_5350;
85 u8 phy_addr; /* PHY address of the device */
86 struct ifreq ifr;
87 struct net_device *dev;
88 unsigned char port[6];
89 };
90
91 /* Currently we can only have one device in the system. */
92 static struct robo_switch robo;
93
94
95 static int do_ioctl(int cmd, void *buf)
96 {
97 mm_segment_t old_fs = get_fs();
98 int ret;
99
100 if (buf != NULL)
101 robo.ifr.ifr_data = (caddr_t) buf;
102
103 set_fs(KERNEL_DS);
104 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
105 ret = robo.dev->netdev_ops->ndo_do_ioctl(robo.dev, &robo.ifr, cmd);
106 #else
107 ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
108 #endif
109 set_fs(old_fs);
110
111 return ret;
112 }
113
114 static u16 mdio_read(__u16 phy_id, __u8 reg)
115 {
116 if (robo.use_et) {
117 int args[2] = { reg };
118
119 if (phy_id != robo.phy_addr) {
120 printk(KERN_ERR PFX
121 "Access to real 'phy' registers unavaliable.\n"
122 "Upgrade kernel driver.\n");
123
124 return 0xffff;
125 }
126
127
128 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
129 printk(KERN_ERR PFX
130 "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
131 return 0xffff;
132 }
133
134 return args[1];
135 } else {
136 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
137 mii->phy_id = phy_id;
138 mii->reg_num = reg;
139
140 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
141 printk(KERN_ERR PFX
142 "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
143
144 return 0xffff;
145 }
146
147 return mii->val_out;
148 }
149 }
150
151 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
152 {
153 if (robo.use_et) {
154 int args[2] = { reg, val };
155
156 if (phy_id != robo.phy_addr) {
157 printk(KERN_ERR PFX
158 "Access to real 'phy' registers unavaliable.\n"
159 "Upgrade kernel driver.\n");
160
161 return;
162 }
163
164 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
165 printk(KERN_ERR PFX
166 "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
167 return;
168 }
169 } else {
170 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
171
172 mii->phy_id = phy_id;
173 mii->reg_num = reg;
174 mii->val_in = val;
175
176 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
177 printk(KERN_ERR PFX
178 "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
179 return;
180 }
181 }
182 }
183
184 static int robo_reg(__u8 page, __u8 reg, __u8 op)
185 {
186 int i = 3;
187
188 /* set page number */
189 mdio_write(robo.phy_addr, REG_MII_PAGE,
190 (page << 8) | REG_MII_PAGE_ENABLE);
191
192 /* set register address */
193 mdio_write(robo.phy_addr, REG_MII_ADDR,
194 (reg << 8) | op);
195
196 /* check if operation completed */
197 while (i--) {
198 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
199 return 0;
200 }
201
202 printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
203
204 return 0;
205 }
206
207 /*
208 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
209 {
210 int i;
211
212 robo_reg(page, reg, REG_MII_ADDR_READ);
213
214 for (i = 0; i < count; i++)
215 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
216 }
217 */
218
219 static __u16 robo_read16(__u8 page, __u8 reg)
220 {
221 robo_reg(page, reg, REG_MII_ADDR_READ);
222
223 return mdio_read(robo.phy_addr, REG_MII_DATA0);
224 }
225
226 static __u32 robo_read32(__u8 page, __u8 reg)
227 {
228 robo_reg(page, reg, REG_MII_ADDR_READ);
229
230 return mdio_read(robo.phy_addr, REG_MII_DATA0) +
231 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
232 }
233
234 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
235 {
236 /* write data */
237 mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
238
239 robo_reg(page, reg, REG_MII_ADDR_WRITE);
240 }
241
242 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
243 {
244 /* write data */
245 mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
246 mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
247
248 robo_reg(page, reg, REG_MII_ADDR_WRITE);
249 }
250
251 /* checks that attached switch is 5325E/5350 */
252 static int robo_vlan5350(void)
253 {
254 /* set vlan access id to 15 and read it back */
255 __u16 val16 = 15;
256 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
257
258 /* 5365 will refuse this as it does not have this reg */
259 return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
260 }
261
262 static int robo_switch_enable(void)
263 {
264 unsigned int i, last_port;
265 u16 val;
266
267 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
268 if (!(val & (1 << 1))) {
269 /* Unmanaged mode */
270 val &= ~(1 << 0);
271 /* With forwarding */
272 val |= (1 << 1);
273 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
274 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
275 if (!(val & (1 << 1))) {
276 printk("Failed to enable switch\n");
277 return -EBUSY;
278 }
279
280 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
281 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
282 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
283 robo_write16(ROBO_CTRL_PAGE, i, 0);
284 }
285
286 /* WAN port LED, except for Netgear WGT634U */
287 if (strcmp(getvar("nvram_type"), "cfe") != 0)
288 robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
289
290 return 0;
291 }
292
293 static void robo_switch_reset(void)
294 {
295 if ((robo.devid == ROBO_DEVICE_ID_5395) ||
296 (robo.devid == ROBO_DEVICE_ID_5397) ||
297 (robo.devid == ROBO_DEVICE_ID_5398)) {
298 /* Trigger a software reset. */
299 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
300 mdelay(500);
301 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
302 }
303 }
304
305 static int robo_probe(char *devname)
306 {
307 __u32 phyid;
308 unsigned int i;
309 int err;
310
311 printk(KERN_INFO PFX "Probing device %s: ", devname);
312 strcpy(robo.ifr.ifr_name, devname);
313
314 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
315 if ((robo.dev = dev_get_by_name(devname)) == NULL) {
316 #else
317 if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
318 #endif
319 printk("No such device\n");
320 return 1;
321 }
322
323 robo.device = devname;
324 for (i = 0; i < 5; i++)
325 robo.port[i] = i;
326 robo.port[5] = 8;
327
328 /* try access using MII ioctls - get phy address */
329 if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
330 robo.use_et = 1;
331 robo.phy_addr = ROBO_PHY_ADDR;
332 } else {
333 /* got phy address check for robo address */
334 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
335 if ((mii->phy_id != ROBO_PHY_ADDR) &&
336 (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
337 (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
338 printk("Invalid phy address (%d)\n", mii->phy_id);
339 return 1;
340 }
341 robo.use_et = 0;
342 /* The robo has a fixed PHY address that is different from the
343 * Tigon3 and BCM63xx PHY address. */
344 robo.phy_addr = ROBO_PHY_ADDR;
345 }
346
347 phyid = mdio_read(robo.phy_addr, 0x2) |
348 (mdio_read(robo.phy_addr, 0x3) << 16);
349
350 if (phyid == 0xffffffff || phyid == 0x55210022) {
351 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
352 return 1;
353 }
354
355 /* Get the device ID */
356 for (i = 0; i < 10; i++) {
357 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
358 if (robo.devid)
359 break;
360 udelay(10);
361 }
362 if (!robo.devid)
363 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
364 robo.is_5350 = robo_vlan5350();
365
366 robo_switch_reset();
367 err = robo_switch_enable();
368 if (err)
369 return err;
370
371 printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
372 robo.is_5350 ? " It's a 5350." : "");
373 return 0;
374 }
375
376
377 static int handle_vlan_port_read(void *driver, char *buf, int nr)
378 {
379 __u16 val16;
380 int len = 0;
381 int j;
382
383 val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
384
385 if (robo.is_5350) {
386 u32 val32;
387 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
388 /* actual read */
389 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
390 if ((val32 & (1 << 20)) /* valid */) {
391 for (j = 0; j < 6; j++) {
392 if (val32 & (1 << j)) {
393 len += sprintf(buf + len, "%d", j);
394 if (val32 & (1 << (j + 6))) {
395 if (j == 5) buf[len++] = 'u';
396 } else {
397 buf[len++] = 't';
398 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
399 buf[len++] = '*';
400 }
401 buf[len++] = '\t';
402 }
403 }
404 len += sprintf(buf + len, "\n");
405 }
406 } else {
407 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
408 /* actual read */
409 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
410 if ((val16 & (1 << 14)) /* valid */) {
411 for (j = 0; j < 6; j++) {
412 if (val16 & (1 << j)) {
413 len += sprintf(buf + len, "%d", j);
414 if (val16 & (1 << (j + 7))) {
415 if (j == 5) buf[len++] = 'u';
416 } else {
417 buf[len++] = 't';
418 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
419 buf[len++] = '*';
420 }
421 buf[len++] = '\t';
422 }
423 }
424 len += sprintf(buf + len, "\n");
425 }
426 }
427
428 buf[len] = '\0';
429
430 return len;
431 }
432
433 static int handle_vlan_port_write(void *driver, char *buf, int nr)
434 {
435 switch_driver *d = (switch_driver *) driver;
436 switch_vlan_config *c = switch_parse_vlan(d, buf);
437 int j;
438 __u16 val16;
439
440 if (c == NULL)
441 return -EINVAL;
442
443 for (j = 0; j < d->ports; j++) {
444 if ((c->untag | c->pvid) & (1 << j))
445 /* change default vlan tag */
446 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
447 }
448
449 /* write config now */
450
451 if (robo.devid != ROBO_DEVICE_ID_5325) {
452 __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
453 (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
454
455 robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
456 robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
457 robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
458 return 0;
459 }
460
461 val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
462 if (robo.is_5350) {
463 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
464 (1 << 20) /* valid */ | (c->untag << 6) | c->port);
465 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
466 } else {
467 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
468 (1 << 14) /* valid */ | (c->untag << 7) | c->port);
469 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
470 }
471
472 return 0;
473 }
474
475 #define set_switch(state) \
476 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
477
478 static int handle_enable_read(void *driver, char *buf, int nr)
479 {
480 return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
481 }
482
483 static int handle_enable_write(void *driver, char *buf, int nr)
484 {
485 set_switch(buf[0] == '1');
486
487 return 0;
488 }
489
490 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
491 {
492 return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
493 }
494
495 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
496 {
497 int disable = ((buf[0] != '1') ? 1 : 0);
498
499 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
500 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
501 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
502 (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
503 0) | (1 << 2) | (1 << 3)); /* RSV multicast */
504
505 if (robo.devid != ROBO_DEVICE_ID_5325)
506 return 0;
507
508 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
509 (1 << 6) /* drop invalid VID frames */);
510 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
511 (1 << 3) /* drop miss V table frames */);
512
513 return 0;
514 }
515
516 static int handle_reset(void *driver, char *buf, int nr)
517 {
518 switch_driver *d = (switch_driver *) driver;
519 switch_vlan_config *c = switch_parse_vlan(d, buf);
520 int j;
521 __u16 val16;
522
523 if (c == NULL)
524 return -EINVAL;
525
526 /* disable switching */
527 set_switch(0);
528
529 /* reset vlans */
530 for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
531 /* write config now */
532 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
533 if (robo.is_5350)
534 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
535 else
536 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
537 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
538 ROBO_VLAN_TABLE_ACCESS,
539 val16);
540 }
541
542 /* reset ports to a known good state */
543 for (j = 0; j < d->ports; j++) {
544 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
545 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
546 }
547
548 /* enable switching */
549 set_switch(1);
550
551 /* enable vlans */
552 handle_enable_vlan_write(driver, "1", 0);
553
554 return 0;
555 }
556
557 static int __init robo_init(void)
558 {
559 int notfound = 1;
560 char *device;
561
562 device = strdup("ethX");
563 for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
564 if (! switch_device_registered (device))
565 notfound = robo_probe(device);
566 }
567 device[3]--;
568
569 if (notfound) {
570 kfree(device);
571 return -ENODEV;
572 } else {
573 static const switch_config cfg[] = {
574 {
575 .name = "enable",
576 .read = handle_enable_read,
577 .write = handle_enable_write
578 }, {
579 .name = "enable_vlan",
580 .read = handle_enable_vlan_read,
581 .write = handle_enable_vlan_write
582 }, {
583 .name = "reset",
584 .read = NULL,
585 .write = handle_reset
586 }, { NULL, },
587 };
588 static const switch_config vlan[] = {
589 {
590 .name = "ports",
591 .read = handle_vlan_port_read,
592 .write = handle_vlan_port_write
593 }, { NULL, },
594 };
595 switch_driver driver = {
596 .name = DRIVER_NAME,
597 .version = DRIVER_VERSION,
598 .interface = device,
599 .cpuport = 5,
600 .ports = 6,
601 .vlans = 16,
602 .driver_handlers = cfg,
603 .port_handlers = NULL,
604 .vlan_handlers = vlan,
605 };
606 if (robo.devid != ROBO_DEVICE_ID_5325) {
607 driver.ports = 9;
608 driver.cpuport = 8;
609 }
610
611 return switch_register_driver(&driver);
612 }
613 }
614
615 static void __exit robo_exit(void)
616 {
617 switch_unregister_driver(DRIVER_NAME);
618 kfree(robo.device);
619 }
620
621
622 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
623 MODULE_LICENSE("GPL");
624
625 module_init(robo_init);
626 module_exit(robo_exit);
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