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[openwrt/svn-archive/archive.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/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 /* 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 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
301 }
302 }
303
304 static int robo_probe(char *devname)
305 {
306 __u32 phyid;
307 unsigned int i;
308 int err;
309
310 printk(KERN_INFO PFX "Probing device %s: ", devname);
311 strcpy(robo.ifr.ifr_name, devname);
312
313 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
314 if ((robo.dev = dev_get_by_name(devname)) == NULL) {
315 #else
316 if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
317 #endif
318 printk("No such device\n");
319 return 1;
320 }
321
322 robo.device = devname;
323 for (i = 0; i < 5; i++)
324 robo.port[i] = i;
325 robo.port[5] = 8;
326
327 /* try access using MII ioctls - get phy address */
328 if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
329 robo.use_et = 1;
330 robo.phy_addr = ROBO_PHY_ADDR;
331 } else {
332 /* got phy address check for robo address */
333 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
334 if ((mii->phy_id != ROBO_PHY_ADDR) &&
335 (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
336 (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
337 printk("Invalid phy address (%d)\n", mii->phy_id);
338 return 1;
339 }
340 robo.use_et = 0;
341 /* The robo has a fixed PHY address that is different from the
342 * Tigon3 and BCM63xx PHY address. */
343 robo.phy_addr = ROBO_PHY_ADDR;
344 }
345
346 phyid = mdio_read(robo.phy_addr, 0x2) |
347 (mdio_read(robo.phy_addr, 0x3) << 16);
348
349 if (phyid == 0xffffffff || phyid == 0x55210022) {
350 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
351 return 1;
352 }
353
354 /* Get the device ID */
355 for (i = 0; i < 10; i++) {
356 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
357 if (robo.devid)
358 break;
359 udelay(10);
360 }
361 if (!robo.devid)
362 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
363 robo.is_5350 = robo_vlan5350();
364
365 robo_switch_reset();
366 err = robo_switch_enable();
367 if (err)
368 return err;
369
370 printk("found!\n");
371 return 0;
372 }
373
374
375 static int handle_vlan_port_read(void *driver, char *buf, int nr)
376 {
377 __u16 val16;
378 int len = 0;
379 int j;
380
381 val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
382
383 if (robo.is_5350) {
384 u32 val32;
385 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
386 /* actual read */
387 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
388 if ((val32 & (1 << 20)) /* valid */) {
389 for (j = 0; j < 6; j++) {
390 if (val32 & (1 << j)) {
391 len += sprintf(buf + len, "%d", j);
392 if (val32 & (1 << (j + 6))) {
393 if (j == 5) buf[len++] = 'u';
394 } else {
395 buf[len++] = 't';
396 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
397 buf[len++] = '*';
398 }
399 buf[len++] = '\t';
400 }
401 }
402 len += sprintf(buf + len, "\n");
403 }
404 } else {
405 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
406 /* actual read */
407 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
408 if ((val16 & (1 << 14)) /* valid */) {
409 for (j = 0; j < 6; j++) {
410 if (val16 & (1 << j)) {
411 len += sprintf(buf + len, "%d", j);
412 if (val16 & (1 << (j + 7))) {
413 if (j == 5) buf[len++] = 'u';
414 } else {
415 buf[len++] = 't';
416 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
417 buf[len++] = '*';
418 }
419 buf[len++] = '\t';
420 }
421 }
422 len += sprintf(buf + len, "\n");
423 }
424 }
425
426 buf[len] = '\0';
427
428 return len;
429 }
430
431 static int handle_vlan_port_write(void *driver, char *buf, int nr)
432 {
433 switch_driver *d = (switch_driver *) driver;
434 switch_vlan_config *c = switch_parse_vlan(d, buf);
435 int j;
436 __u16 val16;
437
438 if (c == NULL)
439 return -EINVAL;
440
441 for (j = 0; j < d->ports; j++) {
442 if ((c->untag | c->pvid) & (1 << j))
443 /* change default vlan tag */
444 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
445 }
446
447 /* write config now */
448 val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
449 if (robo.is_5350) {
450 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
451 (1 << 20) /* valid */ | (c->untag << 6) | c->port);
452 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
453 } else {
454 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
455 (1 << 14) /* valid */ | (c->untag << 7) | c->port);
456 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
457 }
458
459 return 0;
460 }
461
462 #define set_switch(state) \
463 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
464
465 static int handle_enable_read(void *driver, char *buf, int nr)
466 {
467 return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
468 }
469
470 static int handle_enable_write(void *driver, char *buf, int nr)
471 {
472 set_switch(buf[0] == '1');
473
474 return 0;
475 }
476
477 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
478 {
479 return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
480 }
481
482 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
483 {
484 int disable = ((buf[0] != '1') ? 1 : 0);
485
486 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
487 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
488 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
489 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
490 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
491 (1 << 6) /* drop invalid VID frames */);
492 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
493 (1 << 3) /* drop miss V table frames */);
494
495 return 0;
496 }
497
498 static int handle_reset(void *driver, char *buf, int nr)
499 {
500 switch_driver *d = (switch_driver *) driver;
501 switch_vlan_config *c = switch_parse_vlan(d, buf);
502 int j;
503 __u16 val16;
504
505 if (c == NULL)
506 return -EINVAL;
507
508 /* disable switching */
509 set_switch(0);
510
511 /* reset vlans */
512 for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
513 /* write config now */
514 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
515 if (robo.is_5350)
516 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
517 else
518 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
519 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
520 ROBO_VLAN_TABLE_ACCESS,
521 val16);
522 }
523
524 /* reset ports to a known good state */
525 for (j = 0; j < d->ports; j++) {
526 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
527 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
528 }
529
530 /* enable switching */
531 set_switch(1);
532
533 /* enable vlans */
534 handle_enable_vlan_write(driver, "1", 0);
535
536 return 0;
537 }
538
539 static int __init robo_init(void)
540 {
541 int notfound = 1;
542 char *device;
543
544 device = strdup("ethX");
545 for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
546 if (! switch_device_registered (device))
547 notfound = robo_probe(device);
548 }
549 device[3]--;
550
551 if (notfound) {
552 kfree(device);
553 return -ENODEV;
554 } else {
555 static const switch_config cfg[] = {
556 {
557 .name = "enable",
558 .read = handle_enable_read,
559 .write = handle_enable_write
560 }, {
561 .name = "enable_vlan",
562 .read = handle_enable_vlan_read,
563 .write = handle_enable_vlan_write
564 }, {
565 .name = "reset",
566 .read = NULL,
567 .write = handle_reset
568 }, { NULL, },
569 };
570 static const switch_config vlan[] = {
571 {
572 .name = "ports",
573 .read = handle_vlan_port_read,
574 .write = handle_vlan_port_write
575 }, { NULL, },
576 };
577 switch_driver driver = {
578 .name = DRIVER_NAME,
579 .version = DRIVER_VERSION,
580 .interface = device,
581 .cpuport = 5,
582 .ports = 6,
583 .vlans = 16,
584 .driver_handlers = cfg,
585 .port_handlers = NULL,
586 .vlan_handlers = vlan,
587 };
588
589 return switch_register_driver(&driver);
590 }
591 }
592
593 static void __exit robo_exit(void)
594 {
595 switch_unregister_driver(DRIVER_NAME);
596 kfree(robo.device);
597 }
598
599
600 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
601 MODULE_LICENSE("GPL");
602
603 module_init(robo_init);
604 module_exit(robo_exit);
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