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madwifi: fix fast-frame related dma unmap bug
[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 /* linux 2.4 does not have 'bool' */
66 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
67 #define bool int
68 #endif
69
70 /* Data structure for a Roboswitch device. */
71 struct robo_switch {
72 char *device; /* The device name string (ethX) */
73 u16 devid; /* ROBO_DEVICE_ID_53xx */
74 bool use_et;
75 bool is_5350;
76 u8 phy_addr; /* PHY address of the device */
77 struct ifreq ifr;
78 struct net_device *dev;
79 unsigned char port[6];
80 };
81
82 /* Currently we can only have one device in the system. */
83 static struct robo_switch robo;
84
85
86 static int do_ioctl(int cmd, void *buf)
87 {
88 mm_segment_t old_fs = get_fs();
89 int ret;
90
91 if (buf != NULL)
92 robo.ifr.ifr_data = (caddr_t) buf;
93
94 set_fs(KERNEL_DS);
95 ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
96 set_fs(old_fs);
97
98 return ret;
99 }
100
101 static u16 mdio_read(__u16 phy_id, __u8 reg)
102 {
103 if (robo.use_et) {
104 int args[2] = { reg };
105
106 if (phy_id != robo.phy_addr) {
107 printk(KERN_ERR PFX
108 "Access to real 'phy' registers unavaliable.\n"
109 "Upgrade kernel driver.\n");
110
111 return 0xffff;
112 }
113
114
115 if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
116 printk(KERN_ERR PFX
117 "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
118 return 0xffff;
119 }
120
121 return args[1];
122 } else {
123 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
124 mii->phy_id = phy_id;
125 mii->reg_num = reg;
126
127 if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
128 printk(KERN_ERR PFX
129 "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
130
131 return 0xffff;
132 }
133
134 return mii->val_out;
135 }
136 }
137
138 static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
139 {
140 if (robo.use_et) {
141 int args[2] = { reg, val };
142
143 if (phy_id != robo.phy_addr) {
144 printk(KERN_ERR PFX
145 "Access to real 'phy' registers unavaliable.\n"
146 "Upgrade kernel driver.\n");
147
148 return;
149 }
150
151 if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
152 printk(KERN_ERR PFX
153 "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
154 return;
155 }
156 } else {
157 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
158
159 mii->phy_id = phy_id;
160 mii->reg_num = reg;
161 mii->val_in = val;
162
163 if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
164 printk(KERN_ERR PFX
165 "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
166 return;
167 }
168 }
169 }
170
171 static int robo_reg(__u8 page, __u8 reg, __u8 op)
172 {
173 int i = 3;
174
175 /* set page number */
176 mdio_write(robo.phy_addr, REG_MII_PAGE,
177 (page << 8) | REG_MII_PAGE_ENABLE);
178
179 /* set register address */
180 mdio_write(robo.phy_addr, REG_MII_ADDR,
181 (reg << 8) | op);
182
183 /* check if operation completed */
184 while (i--) {
185 if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
186 return 0;
187 }
188
189 printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
190
191 return 0;
192 }
193
194 /*
195 static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
196 {
197 int i;
198
199 robo_reg(page, reg, REG_MII_ADDR_READ);
200
201 for (i = 0; i < count; i++)
202 val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
203 }
204 */
205
206 static __u16 robo_read16(__u8 page, __u8 reg)
207 {
208 robo_reg(page, reg, REG_MII_ADDR_READ);
209
210 return mdio_read(robo.phy_addr, REG_MII_DATA0);
211 }
212
213 static __u32 robo_read32(__u8 page, __u8 reg)
214 {
215 robo_reg(page, reg, REG_MII_ADDR_READ);
216
217 return mdio_read(robo.phy_addr, REG_MII_DATA0) +
218 (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
219 }
220
221 static void robo_write16(__u8 page, __u8 reg, __u16 val16)
222 {
223 /* write data */
224 mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
225
226 robo_reg(page, reg, REG_MII_ADDR_WRITE);
227 }
228
229 static void robo_write32(__u8 page, __u8 reg, __u32 val32)
230 {
231 /* write data */
232 mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
233 mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
234
235 robo_reg(page, reg, REG_MII_ADDR_WRITE);
236 }
237
238 /* checks that attached switch is 5325E/5350 */
239 static int robo_vlan5350(void)
240 {
241 /* set vlan access id to 15 and read it back */
242 __u16 val16 = 15;
243 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
244
245 /* 5365 will refuse this as it does not have this reg */
246 return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
247 }
248
249 static int robo_switch_enable(void)
250 {
251 unsigned int i, last_port;
252 u16 val;
253
254 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
255 if (!(val & (1 << 1))) {
256 /* Unmanaged mode */
257 val &= ~(1 << 0);
258 /* With forwarding */
259 val |= (1 << 1);
260 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
261 val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
262 if (!(val & (1 << 1))) {
263 printk("Failed to enable switch\n");
264 return -EBUSY;
265 }
266
267 last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
268 ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
269 for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
270 robo_write16(ROBO_CTRL_PAGE, i, 0);
271 }
272
273 /* WAN port LED */
274 robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
275
276 return 0;
277 }
278
279 static void robo_switch_reset(void)
280 {
281 if ((robo.devid == ROBO_DEVICE_ID_5395) ||
282 (robo.devid == ROBO_DEVICE_ID_5397) ||
283 (robo.devid == ROBO_DEVICE_ID_5398)) {
284 /* Trigger a software reset. */
285 robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
286 robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
287 }
288 }
289
290 static int robo_probe(char *devname)
291 {
292 __u32 phyid;
293 unsigned int i;
294 int err;
295
296 printk(KERN_INFO PFX "Probing device %s: ", devname);
297 strcpy(robo.ifr.ifr_name, devname);
298
299 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
300 if ((robo.dev = dev_get_by_name(devname)) == NULL) {
301 #else
302 if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
303 #endif
304 printk("No such device\n");
305 return 1;
306 }
307
308 robo.device = devname;
309 for (i = 0; i < 5; i++)
310 robo.port[i] = i;
311 robo.port[5] = 8;
312
313 /* try access using MII ioctls - get phy address */
314 if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
315 robo.use_et = 1;
316 robo.phy_addr = ROBO_PHY_ADDR;
317 } else {
318 /* got phy address check for robo address */
319 struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
320 if ((mii->phy_id != ROBO_PHY_ADDR) &&
321 (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
322 printk("Invalid phy address (%d)\n", mii->phy_id);
323 return 1;
324 }
325 robo.use_et = 0;
326 /* The robo has a fixed PHY address that is different from the
327 * Tigon3 PHY address. */
328 robo.phy_addr = ROBO_PHY_ADDR;
329 }
330
331 phyid = mdio_read(robo.phy_addr, 0x2) |
332 (mdio_read(robo.phy_addr, 0x3) << 16);
333
334 if (phyid == 0xffffffff || phyid == 0x55210022) {
335 printk("No Robo switch in managed mode found\n");
336 return 1;
337 }
338
339 /* Get the device ID */
340 for (i = 0; i < 10; i++) {
341 robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
342 if (robo.devid)
343 break;
344 udelay(10);
345 }
346 if (!robo.devid)
347 robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
348 robo.is_5350 = robo_vlan5350();
349
350 robo_switch_reset();
351 err = robo_switch_enable();
352 if (err)
353 return err;
354
355 printk("found!\n");
356 return 0;
357 }
358
359
360 static int handle_vlan_port_read(void *driver, char *buf, int nr)
361 {
362 __u16 val16;
363 int len = 0;
364 int j;
365
366 val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
367
368 if (robo.is_5350) {
369 u32 val32;
370 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
371 /* actual read */
372 val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
373 if ((val32 & (1 << 20)) /* valid */) {
374 for (j = 0; j < 6; j++) {
375 if (val32 & (1 << j)) {
376 len += sprintf(buf + len, "%d", j);
377 if (val32 & (1 << (j + 6))) {
378 if (j == 5) buf[len++] = 'u';
379 } else {
380 buf[len++] = 't';
381 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
382 buf[len++] = '*';
383 }
384 buf[len++] = '\t';
385 }
386 }
387 len += sprintf(buf + len, "\n");
388 }
389 } else {
390 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
391 /* actual read */
392 val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
393 if ((val16 & (1 << 14)) /* valid */) {
394 for (j = 0; j < 6; j++) {
395 if (val16 & (1 << j)) {
396 len += sprintf(buf + len, "%d", j);
397 if (val16 & (1 << (j + 7))) {
398 if (j == 5) buf[len++] = 'u';
399 } else {
400 buf[len++] = 't';
401 if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
402 buf[len++] = '*';
403 }
404 buf[len++] = '\t';
405 }
406 }
407 len += sprintf(buf + len, "\n");
408 }
409 }
410
411 buf[len] = '\0';
412
413 return len;
414 }
415
416 static int handle_vlan_port_write(void *driver, char *buf, int nr)
417 {
418 switch_driver *d = (switch_driver *) driver;
419 switch_vlan_config *c = switch_parse_vlan(d, buf);
420 int j;
421 __u16 val16;
422
423 if (c == NULL)
424 return -EINVAL;
425
426 for (j = 0; j < d->ports; j++) {
427 if ((c->untag | c->pvid) & (1 << j))
428 /* change default vlan tag */
429 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
430 }
431
432 /* write config now */
433 val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
434 if (robo.is_5350) {
435 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
436 (1 << 20) /* valid */ | (c->untag << 6) | c->port);
437 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
438 } else {
439 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
440 (1 << 14) /* valid */ | (c->untag << 7) | c->port);
441 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
442 }
443
444 return 0;
445 }
446
447 #define set_switch(state) \
448 robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
449
450 static int handle_enable_read(void *driver, char *buf, int nr)
451 {
452 return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
453 }
454
455 static int handle_enable_write(void *driver, char *buf, int nr)
456 {
457 set_switch(buf[0] == '1');
458
459 return 0;
460 }
461
462 static int handle_enable_vlan_read(void *driver, char *buf, int nr)
463 {
464 return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
465 }
466
467 static int handle_enable_vlan_write(void *driver, char *buf, int nr)
468 {
469 int disable = ((buf[0] != '1') ? 1 : 0);
470
471 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
472 (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
473 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
474 (1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
475 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
476 (1 << 6) /* drop invalid VID frames */);
477 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
478 (1 << 3) /* drop miss V table frames */);
479
480 return 0;
481 }
482
483 static int handle_reset(void *driver, char *buf, int nr)
484 {
485 switch_driver *d = (switch_driver *) driver;
486 switch_vlan_config *c = switch_parse_vlan(d, buf);
487 int j;
488 __u16 val16;
489
490 if (c == NULL)
491 return -EINVAL;
492
493 /* disable switching */
494 set_switch(0);
495
496 /* reset vlans */
497 for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
498 /* write config now */
499 val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
500 if (robo.is_5350)
501 robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
502 else
503 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
504 robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
505 ROBO_VLAN_TABLE_ACCESS,
506 val16);
507 }
508
509 /* reset ports to a known good state */
510 for (j = 0; j < d->ports; j++) {
511 robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
512 robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
513 }
514
515 /* enable switching */
516 set_switch(1);
517
518 /* enable vlans */
519 handle_enable_vlan_write(driver, "1", 0);
520
521 return 0;
522 }
523
524 static int __init robo_init(void)
525 {
526 int notfound = 1;
527 char *device;
528
529 device = strdup("ethX");
530 for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
531 if (! switch_device_registered (device))
532 notfound = robo_probe(device);
533 }
534 device[3]--;
535
536 if (notfound) {
537 kfree(device);
538 return -ENODEV;
539 } else {
540 static const switch_config cfg[] = {
541 {
542 .name = "enable",
543 .read = handle_enable_read,
544 .write = handle_enable_write
545 }, {
546 .name = "enable_vlan",
547 .read = handle_enable_vlan_read,
548 .write = handle_enable_vlan_write
549 }, {
550 .name = "reset",
551 .read = NULL,
552 .write = handle_reset
553 }, { NULL, },
554 };
555 static const switch_config vlan[] = {
556 {
557 .name = "ports",
558 .read = handle_vlan_port_read,
559 .write = handle_vlan_port_write
560 }, { NULL, },
561 };
562 switch_driver driver = {
563 .name = DRIVER_NAME,
564 .version = DRIVER_VERSION,
565 .interface = device,
566 .cpuport = 5,
567 .ports = 6,
568 .vlans = 16,
569 .driver_handlers = cfg,
570 .port_handlers = NULL,
571 .vlan_handlers = vlan,
572 };
573
574 return switch_register_driver(&driver);
575 }
576 }
577
578 static void __exit robo_exit(void)
579 {
580 switch_unregister_driver(DRIVER_NAME);
581 kfree(robo.device);
582 }
583
584
585 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
586 MODULE_LICENSE("GPL");
587
588 module_init(robo_init);
589 module_exit(robo_exit);
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