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