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