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ath9k: add some code to control internal driver queue length limits
[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 /* Only available on brcm47xx */
67 #ifdef BROADCOM
68 extern char *nvram_get(const char *name);
69 #define getvar(str) (nvram_get(str)?:"")
70 #else
71 #define getvar(str) ""
72 #endif
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 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
100 ret = robo.dev->netdev_ops->ndo_do_ioctl(robo.dev, &robo.ifr, cmd);
101 #else
102 ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
103 #endif
104 set_fs(old_fs);
105
106 return ret;
107 }
108
109 static u16 mdio_read(__u16 phy_id, __u8 reg)
110 {
111 if (robo.use_et) {
112 int args[2] = { reg };
113
114 if (phy_id != robo.phy_addr) {
115 printk(KERN_ERR PFX
116 "Access to real 'phy' registers unavaliable.\n"
117 "Upgrade kernel driver.\n");
118
119 return 0xffff;
120 }
121
122
123 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
124 printk(KERN_ERR PFX
125 "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
126 return 0xffff;
127 }
128
129 return args[1];
130 } else {
131 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
132 mii->phy_id = phy_id;
133 mii->reg_num = reg;
134
135 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
136 printk(KERN_ERR PFX
137 "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
138
139 return 0xffff;
140 }
141
142 return mii->val_out;
143 }
144 }
145
146 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
147 {
148 if (robo.use_et) {
149 int args[2] = { reg, val };
150
151 if (phy_id != robo.phy_addr) {
152 printk(KERN_ERR PFX
153 "Access to real 'phy' registers unavaliable.\n"
154 "Upgrade kernel driver.\n");
155
156 return;
157 }
158
159 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
160 printk(KERN_ERR PFX
161 "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
162 return;
163 }
164 } else {
165 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
166
167 mii->phy_id = phy_id;
168 mii->reg_num = reg;
169 mii->val_in = val;
170
171 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
172 printk(KERN_ERR PFX
173 "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
174 return;
175 }
176 }
177 }
178
179 static int robo_reg(__u8 page, __u8 reg, __u8 op)
180 {
181 int i = 3;
182
183 /* set page number */
184 mdio_write(robo.phy_addr, REG_MII_PAGE,
185 (page << 8) | REG_MII_PAGE_ENABLE);
186
187 /* set register address */
188 mdio_write(robo.phy_addr, REG_MII_ADDR,
189 (reg << 8) | op);
190
191 /* check if operation completed */
192 while (i--) {
193 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
194 return 0;
195 }
196
197 printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
198
199 return 0;
200 }
201
202 /*
203 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
204 {
205 int i;
206
207 robo_reg(page, reg, REG_MII_ADDR_READ);
208
209 for (i = 0; i < count; i++)
210 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
211 }
212 */
213
214 static __u16 robo_read16(__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 }
220
221 static __u32 robo_read32(__u8 page, __u8 reg)
222 {
223 robo_reg(page, reg, REG_MII_ADDR_READ);
224
225 return mdio_read(robo.phy_addr, REG_MII_DATA0) +
226 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
227 }
228
229 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
230 {
231 /* write data */
232 mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
233
234 robo_reg(page, reg, REG_MII_ADDR_WRITE);
235 }
236
237 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
238 {
239 /* write data */
240 mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
241 mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
242
243 robo_reg(page, reg, REG_MII_ADDR_WRITE);
244 }
245
246 /* checks that attached switch is 5325E/5350 */
247 static int robo_vlan5350(void)
248 {
249 /* set vlan access id to 15 and read it back */
250 __u16 val16 = 15;
251 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
252
253 /* 5365 will refuse this as it does not have this reg */
254 return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
255 }
256
257 static int robo_switch_enable(void)
258 {
259 unsigned int i, last_port;
260 u16 val;
261
262 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
263 if (!(val & (1 << 1))) {
264 /* Unmanaged mode */
265 val &= ~(1 << 0);
266 /* With forwarding */
267 val |= (1 << 1);
268 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
269 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
270 if (!(val & (1 << 1))) {
271 printk("Failed to enable switch\n");
272 return -EBUSY;
273 }
274
275 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
276 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
277 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
278 robo_write16(ROBO_CTRL_PAGE, i, 0);
279 }
280
281 /* WAN port LED, except for Netgear WGT634U */
282 if (strcmp(getvar("nvram_type"), "cfe") != 0)
283 robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
284
285 return 0;
286 }
287
288 static void robo_switch_reset(void)
289 {
290 if ((robo.devid == ROBO_DEVICE_ID_5395) ||
291 (robo.devid == ROBO_DEVICE_ID_5397) ||
292 (robo.devid == ROBO_DEVICE_ID_5398)) {
293 /* Trigger a software reset. */
294 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
295 mdelay(500);
296 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
297 }
298 }
299
300 static int robo_probe(char *devname)
301 {
302 __u32 phyid;
303 unsigned int i;
304 int err = 1;
305
306 printk(KERN_INFO PFX "Probing device %s: ", devname);
307 strcpy(robo.ifr.ifr_name, devname);
308
309 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
310 if ((robo.dev = dev_get_by_name(devname)) == NULL) {
311 #else
312 if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
313 #endif
314 printk("No such device\n");
315 return 1;
316 }
317
318 robo.device = devname;
319 for (i = 0; i < 5; i++)
320 robo.port[i] = i;
321 robo.port[5] = 8;
322
323 /* try access using MII ioctls - get phy address */
324 if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
325 robo.use_et = 1;
326 robo.phy_addr = ROBO_PHY_ADDR;
327 } else {
328 /* got phy address check for robo address */
329 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
330 if ((mii->phy_id != ROBO_PHY_ADDR) &&
331 (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
332 (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
333 printk("Invalid phy address (%d)\n", mii->phy_id);
334 goto done;
335 }
336 robo.use_et = 0;
337 /* The robo has a fixed PHY address that is different from the
338 * Tigon3 and BCM63xx PHY address. */
339 robo.phy_addr = ROBO_PHY_ADDR;
340 }
341
342 phyid = mdio_read(robo.phy_addr, 0x2) |
343 (mdio_read(robo.phy_addr, 0x3) << 16);
344
345 if (phyid == 0xffffffff || phyid == 0x55210022) {
346 printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
347 goto done;
348 }
349
350 /* Get the device ID */
351 for (i = 0; i < 10; i++) {
352 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
353 if (robo.devid)
354 break;
355 udelay(10);
356 }
357 if (!robo.devid)
358 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
359 robo.is_5350 = robo_vlan5350();
360
361 robo_switch_reset();
362 err = robo_switch_enable();
363 if (err)
364 goto done;
365 err = 0;
366
367 printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
368 robo.is_5350 ? " It's a 5350." : "");
369
370 done:
371 if (err) {
372 dev_put(robo.dev);
373 robo.dev = NULL;
374 }
375 return err;
376 }
377
378
379 static int handle_vlan_port_read(void *driver, char *buf, int nr)
380 {
381 __u16 val16;
382 int len = 0;
383 int j;
384
385 val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
386
387 if (robo.is_5350) {
388 u32 val32;
389 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
390 /* actual read */
391 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
392 if ((val32 & (1 << 20)) /* valid */) {
393 for (j = 0; j < 6; j++) {
394 if (val32 & (1 << j)) {
395 len += sprintf(buf + len, "%d", j);
396 if (val32 & (1 << (j + 6))) {
397 if (j == 5) buf[len++] = 'u';
398 } else {
399 buf[len++] = 't';
400 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
401 buf[len++] = '*';
402 }
403 buf[len++] = '\t';
404 }
405 }
406 len += sprintf(buf + len, "\n");
407 }
408 } else {
409 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
410 /* actual read */
411 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
412 if ((val16 & (1 << 14)) /* valid */) {
413 for (j = 0; j < 6; j++) {
414 if (val16 & (1 << j)) {
415 len += sprintf(buf + len, "%d", j);
416 if (val16 & (1 << (j + 7))) {
417 if (j == 5) buf[len++] = 'u';
418 } else {
419 buf[len++] = 't';
420 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
421 buf[len++] = '*';
422 }
423 buf[len++] = '\t';
424 }
425 }
426 len += sprintf(buf + len, "\n");
427 }
428 }
429
430 buf[len] = '\0';
431
432 return len;
433 }
434
435 static int handle_vlan_port_write(void *driver, char *buf, int nr)
436 {
437 switch_driver *d = (switch_driver *) driver;
438 switch_vlan_config *c = switch_parse_vlan(d, buf);
439 int j;
440 __u16 val16;
441
442 if (c == NULL)
443 return -EINVAL;
444
445 for (j = 0; j < d->ports; j++) {
446 if ((c->untag | c->pvid) & (1 << j))
447 /* change default vlan tag */
448 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
449 }
450
451 /* write config now */
452
453 if (robo.devid != ROBO_DEVICE_ID_5325) {
454 __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
455 (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
456
457 robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
458 robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
459 robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
460 return 0;
461 }
462
463 val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
464 if (robo.is_5350) {
465 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
466 (1 << 20) /* valid */ | (c->untag << 6) | c->port);
467 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
468 } else {
469 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
470 (1 << 14) /* valid */ | (c->untag << 7) | c->port);
471 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
472 }
473
474 return 0;
475 }
476
477 #define set_switch(state) \
478 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
479
480 static int handle_enable_read(void *driver, char *buf, int nr)
481 {
482 return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
483 }
484
485 static int handle_enable_write(void *driver, char *buf, int nr)
486 {
487 set_switch(buf[0] == '1');
488
489 return 0;
490 }
491
492 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
493 {
494 return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
495 }
496
497 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
498 {
499 int disable = ((buf[0] != '1') ? 1 : 0);
500
501 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
502 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
503 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
504 (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
505 0) | (1 << 2) | (1 << 3)); /* RSV multicast */
506
507 if (robo.devid != ROBO_DEVICE_ID_5325)
508 return 0;
509
510 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
511 (1 << 6) /* drop invalid VID frames */);
512 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
513 (1 << 3) /* drop miss V table frames */);
514
515 return 0;
516 }
517
518 static int handle_reset(void *driver, char *buf, int nr)
519 {
520 switch_driver *d = (switch_driver *) driver;
521 switch_vlan_config *c = switch_parse_vlan(d, buf);
522 int j;
523 __u16 val16;
524
525 if (c == NULL)
526 return -EINVAL;
527
528 /* disable switching */
529 set_switch(0);
530
531 /* reset vlans */
532 for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
533 /* write config now */
534 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
535 if (robo.is_5350)
536 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
537 else
538 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
539 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
540 ROBO_VLAN_TABLE_ACCESS,
541 val16);
542 }
543
544 /* reset ports to a known good state */
545 for (j = 0; j < d->ports; j++) {
546 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
547 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
548 }
549
550 /* enable switching */
551 set_switch(1);
552
553 /* enable vlans */
554 handle_enable_vlan_write(driver, "1", 0);
555
556 return 0;
557 }
558
559 static int __init robo_init(void)
560 {
561 int notfound = 1;
562 char *device;
563
564 device = strdup("ethX");
565 for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
566 if (! switch_device_registered (device))
567 notfound = robo_probe(device);
568 }
569 device[3]--;
570
571 if (notfound) {
572 kfree(device);
573 return -ENODEV;
574 } else {
575 static const switch_config cfg[] = {
576 {
577 .name = "enable",
578 .read = handle_enable_read,
579 .write = handle_enable_write
580 }, {
581 .name = "enable_vlan",
582 .read = handle_enable_vlan_read,
583 .write = handle_enable_vlan_write
584 }, {
585 .name = "reset",
586 .read = NULL,
587 .write = handle_reset
588 }, { NULL, },
589 };
590 static const switch_config vlan[] = {
591 {
592 .name = "ports",
593 .read = handle_vlan_port_read,
594 .write = handle_vlan_port_write
595 }, { NULL, },
596 };
597 switch_driver driver = {
598 .name = DRIVER_NAME,
599 .version = DRIVER_VERSION,
600 .interface = device,
601 .cpuport = 5,
602 .ports = 6,
603 .vlans = 16,
604 .driver_handlers = cfg,
605 .port_handlers = NULL,
606 .vlan_handlers = vlan,
607 };
608 if (robo.devid != ROBO_DEVICE_ID_5325) {
609 driver.ports = 9;
610 driver.cpuport = 8;
611 }
612
613 return switch_register_driver(&driver);
614 }
615 }
616
617 static void __exit robo_exit(void)
618 {
619 switch_unregister_driver(DRIVER_NAME);
620 if (robo.dev)
621 dev_put(robo.dev);
622 kfree(robo.device);
623 }
624
625
626 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
627 MODULE_LICENSE("GPL");
628
629 module_init(robo_init);
630 module_exit(robo_exit);
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