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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
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
61 /* Private et.o ioctls */
62 #define SIOCGETCPHYRD (SIOCDEVPRIVATE + 9)
63 #define SIOCSETCPHYWR (SIOCDEVPRIVATE + 10)
64
65
66 /* Data structure for a Roboswitch device. */
67 struct robo_switch {
68 char *device; /* The device name string (ethX) */
69 u16 devid; /* ROBO_DEVICE_ID_53xx */
70 bool use_et;
71 bool is_5350;
72 u8 phy_addr; /* PHY address of the device */
73 struct ifreq ifr;
74 struct net_device *dev;
75 unsigned char port[6];
76 };
77
78 /* Currently we can only have one device in the system. */
79 static struct robo_switch robo;
80
81
82 static int do_ioctl(int cmd, void *buf)
83 {
84 mm_segment_t old_fs = get_fs();
85 int ret;
86
87 if (buf != NULL)
88 robo.ifr.ifr_data = (caddr_t) buf;
89
90 set_fs(KERNEL_DS);
91 ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
92 set_fs(old_fs);
93
94 return ret;
95 }
96
97 static u16 mdio_read(__u16 phy_id, __u8 reg)
98 {
99 if (robo.use_et) {
100 int args[2] = { reg };
101
102 if (phy_id != robo.phy_addr) {
103 printk(KERN_ERR PFX
104 "Access to real 'phy' registers unavaliable.\n"
105 "Upgrade kernel driver.\n");
106
107 return 0xffff;
108 }
109
110
111 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
112 printk(KERN_ERR PFX
113 "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
114 return 0xffff;
115 }
116
117 return args[1];
118 } else {
119 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
120 mii->phy_id = phy_id;
121 mii->reg_num = reg;
122
123 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
124 printk(KERN_ERR PFX
125 "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
126
127 return 0xffff;
128 }
129
130 return mii->val_out;
131 }
132 }
133
134 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
135 {
136 if (robo.use_et) {
137 int args[2] = { reg, val };
138
139 if (phy_id != robo.phy_addr) {
140 printk(KERN_ERR PFX
141 "Access to real 'phy' registers unavaliable.\n"
142 "Upgrade kernel driver.\n");
143
144 return;
145 }
146
147 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
148 printk(KERN_ERR PFX
149 "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
150 return;
151 }
152 } else {
153 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
154
155 mii->phy_id = phy_id;
156 mii->reg_num = reg;
157 mii->val_in = val;
158
159 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
160 printk(KERN_ERR PFX
161 "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
162 return;
163 }
164 }
165 }
166
167 static int robo_reg(__u8 page, __u8 reg, __u8 op)
168 {
169 int i = 3;
170
171 /* set page number */
172 mdio_write(robo.phy_addr, REG_MII_PAGE,
173 (page << 8) | REG_MII_PAGE_ENABLE);
174
175 /* set register address */
176 mdio_write(robo.phy_addr, REG_MII_ADDR,
177 (reg << 8) | op);
178
179 /* check if operation completed */
180 while (i--) {
181 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
182 return 0;
183 }
184
185 printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
186
187 return 0;
188 }
189
190 /*
191 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
192 {
193 int i;
194
195 robo_reg(page, reg, REG_MII_ADDR_READ);
196
197 for (i = 0; i < count; i++)
198 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
199 }
200 */
201
202 static __u16 robo_read16(__u8 page, __u8 reg)
203 {
204 robo_reg(page, reg, REG_MII_ADDR_READ);
205
206 return mdio_read(robo.phy_addr, REG_MII_DATA0);
207 }
208
209 static __u32 robo_read32(__u8 page, __u8 reg)
210 {
211 robo_reg(page, reg, REG_MII_ADDR_READ);
212
213 return mdio_read(robo.phy_addr, REG_MII_DATA0) +
214 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
215 }
216
217 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
218 {
219 /* write data */
220 mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
221
222 robo_reg(page, reg, REG_MII_ADDR_WRITE);
223 }
224
225 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
226 {
227 /* write data */
228 mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
229 mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
230
231 robo_reg(page, reg, REG_MII_ADDR_WRITE);
232 }
233
234 /* checks that attached switch is 5325E/5350 */
235 static int robo_vlan5350(void)
236 {
237 /* set vlan access id to 15 and read it back */
238 __u16 val16 = 15;
239 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
240
241 /* 5365 will refuse this as it does not have this reg */
242 return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
243 }
244
245 static int robo_switch_enable(void)
246 {
247 unsigned int i, last_port;
248 u16 val;
249
250 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
251 if (!(val & (1 << 1))) {
252 /* Unmanaged mode */
253 val &= ~(1 << 0);
254 /* With forwarding */
255 val |= (1 << 1);
256 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
257 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
258 if (!(val & (1 << 1))) {
259 printk("Failed to enable switch\n");
260 return -EBUSY;
261 }
262
263 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
264 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
265 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
266 robo_write16(ROBO_CTRL_PAGE, i, 0);
267 }
268
269 /* WAN port LED */
270 robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
271
272 return 0;
273 }
274
275 static void robo_switch_reset(void)
276 {
277 if ((robo.devid == ROBO_DEVICE_ID_5395) ||
278 (robo.devid == ROBO_DEVICE_ID_5397) ||
279 (robo.devid == ROBO_DEVICE_ID_5398)) {
280 /* Trigger a software reset. */
281 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
282 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
283 }
284 }
285
286 static int robo_probe(char *devname)
287 {
288 __u32 phyid;
289 unsigned int i;
290 int err;
291
292 printk(KERN_INFO PFX "Probing device %s: ", devname);
293 strcpy(robo.ifr.ifr_name, devname);
294
295 if ((robo.dev = dev_get_by_name(devname)) == NULL) {
296 printk("No such device\n");
297 return 1;
298 }
299
300 robo.device = devname;
301 for (i = 0; i < 5; i++)
302 robo.port[i] = i;
303 robo.port[5] = 8;
304
305 /* try access using MII ioctls - get phy address */
306 if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
307 robo.use_et = 1;
308 robo.phy_addr = ROBO_PHY_ADDR;
309 } else {
310 /* got phy address check for robo address */
311 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
312 if ((mii->phy_id != ROBO_PHY_ADDR) &&
313 (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
314 printk("Invalid phy address (%d)\n", mii->phy_id);
315 return 1;
316 }
317 robo.use_et = 0;
318 /* The robo has a fixed PHY address that is different from the
319 * Tigon3 PHY address. */
320 robo.phy_addr = ROBO_PHY_ADDR;
321 }
322
323 phyid = mdio_read(robo.phy_addr, 0x2) |
324 (mdio_read(robo.phy_addr, 0x3) << 16);
325
326 if (phyid == 0xffffffff || phyid == 0x55210022) {
327 printk("No Robo switch in managed mode found\n");
328 return 1;
329 }
330
331 /* Get the device ID */
332 for (i = 0; i < 10; i++) {
333 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
334 if (robo.devid)
335 break;
336 udelay(10);
337 }
338 if (!robo.devid)
339 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
340 robo.is_5350 = robo_vlan5350();
341
342 robo_switch_reset();
343 err = robo_switch_enable();
344 if (err)
345 return err;
346
347 printk("found!\n");
348 return 0;
349 }
350
351
352 static int handle_vlan_port_read(void *driver, char *buf, int nr)
353 {
354 __u16 val16;
355 int len = 0;
356 int j;
357
358 val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
359
360 if (robo.is_5350) {
361 u32 val32;
362 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
363 /* actual read */
364 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
365 if ((val32 & (1 << 20)) /* valid */) {
366 for (j = 0; j < 6; j++) {
367 if (val32 & (1 << j)) {
368 len += sprintf(buf + len, "%d", j);
369 if (val32 & (1 << (j + 6))) {
370 if (j == 5) buf[len++] = 'u';
371 } else {
372 buf[len++] = 't';
373 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
374 buf[len++] = '*';
375 }
376 buf[len++] = '\t';
377 }
378 }
379 len += sprintf(buf + len, "\n");
380 }
381 } else {
382 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
383 /* actual read */
384 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
385 if ((val16 & (1 << 14)) /* valid */) {
386 for (j = 0; j < 6; j++) {
387 if (val16 & (1 << j)) {
388 len += sprintf(buf + len, "%d", j);
389 if (val16 & (1 << (j + 7))) {
390 if (j == 5) buf[len++] = 'u';
391 } else {
392 buf[len++] = 't';
393 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
394 buf[len++] = '*';
395 }
396 buf[len++] = '\t';
397 }
398 }
399 len += sprintf(buf + len, "\n");
400 }
401 }
402
403 buf[len] = '\0';
404
405 return len;
406 }
407
408 static int handle_vlan_port_write(void *driver, char *buf, int nr)
409 {
410 switch_driver *d = (switch_driver *) driver;
411 switch_vlan_config *c = switch_parse_vlan(d, buf);
412 int j;
413 __u16 val16;
414
415 if (c == NULL)
416 return -EINVAL;
417
418 for (j = 0; j < d->ports; j++) {
419 if ((c->untag | c->pvid) & (1 << j))
420 /* change default vlan tag */
421 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
422 }
423
424 /* write config now */
425 val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
426 if (robo.is_5350) {
427 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
428 (1 << 20) /* valid */ | (c->untag << 6) | c->port);
429 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
430 } else {
431 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
432 (1 << 14) /* valid */ | (c->untag << 7) | c->port);
433 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
434 }
435
436 return 0;
437 }
438
439 #define set_switch(state) \
440 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
441
442 static int handle_enable_read(void *driver, char *buf, int nr)
443 {
444 return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
445 }
446
447 static int handle_enable_write(void *driver, char *buf, int nr)
448 {
449 set_switch(buf[0] == '1');
450
451 return 0;
452 }
453
454 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
455 {
456 return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
457 }
458
459 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
460 {
461 int disable = ((buf[0] != '1') ? 1 : 0);
462
463 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
464 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
465 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
466 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
467 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
468 (1 << 6) /* drop invalid VID frames */);
469 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
470 (1 << 3) /* drop miss V table frames */);
471
472 return 0;
473 }
474
475 static int handle_reset(void *driver, char *buf, int nr)
476 {
477 switch_driver *d = (switch_driver *) driver;
478 switch_vlan_config *c = switch_parse_vlan(d, buf);
479 int j;
480 __u16 val16;
481
482 if (c == NULL)
483 return -EINVAL;
484
485 /* disable switching */
486 set_switch(0);
487
488 /* reset vlans */
489 for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
490 /* write config now */
491 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
492 if (robo.is_5350)
493 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
494 else
495 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
496 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
497 ROBO_VLAN_TABLE_ACCESS,
498 val16);
499 }
500
501 /* reset ports to a known good state */
502 for (j = 0; j < d->ports; j++) {
503 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
504 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
505 }
506
507 /* enable switching */
508 set_switch(1);
509
510 /* enable vlans */
511 handle_enable_vlan_write(driver, "1", 0);
512
513 return 0;
514 }
515
516 static int __init robo_init(void)
517 {
518 int notfound = 1;
519 char *device;
520
521 device = strdup("ethX");
522 for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
523 notfound = robo_probe(device);
524 }
525 device[3]--;
526
527 if (notfound) {
528 kfree(device);
529 return -ENODEV;
530 } else {
531 static const switch_config cfg[] = {
532 {
533 .name = "enable",
534 .read = handle_enable_read,
535 .write = handle_enable_write
536 }, {
537 .name = "enable_vlan",
538 .read = handle_enable_vlan_read,
539 .write = handle_enable_vlan_write
540 }, {
541 .name = "reset",
542 .read = NULL,
543 .write = handle_reset
544 }, { NULL, },
545 };
546 static const switch_config vlan[] = {
547 {
548 .name = "ports",
549 .read = handle_vlan_port_read,
550 .write = handle_vlan_port_write
551 }, { NULL, },
552 };
553 switch_driver driver = {
554 .name = DRIVER_NAME,
555 .version = DRIVER_VERSION,
556 .interface = device,
557 .cpuport = 5,
558 .ports = 6,
559 .vlans = 16,
560 .driver_handlers = cfg,
561 .port_handlers = NULL,
562 .vlan_handlers = vlan,
563 };
564
565 return switch_register_driver(&driver);
566 }
567 }
568
569 static void __exit robo_exit(void)
570 {
571 switch_unregister_driver(DRIVER_NAME);
572 kfree(robo.device);
573 }
574
575
576 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
577 MODULE_LICENSE("GPL");
578
579 module_init(robo_init);
580 module_exit(robo_exit);
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