Root/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#ifdef CONFIG_BCM47XX
38#include <nvram.h>
39#endif
40
41#define DRIVER_NAME "bcm53xx"
42#define DRIVER_VERSION "0.02"
43#define PFX "roboswitch: "
44
45#define ROBO_PHY_ADDR 0x1E /* robo switch phy address */
46#define ROBO_PHY_ADDR_TG3 0x01 /* Tigon3 PHY address */
47#define ROBO_PHY_ADDR_BCM63XX 0x00 /* BCM63XX PHY address */
48
49/* MII registers */
50#define REG_MII_PAGE 0x10 /* MII Page register */
51#define REG_MII_ADDR 0x11 /* MII Address register */
52#define REG_MII_DATA0 0x18 /* MII Data register 0 */
53
54#define REG_MII_PAGE_ENABLE 1
55#define REG_MII_ADDR_WRITE 1
56#define REG_MII_ADDR_READ 2
57
58/* Robo device ID register (in ROBO_MGMT_PAGE) */
59#define ROBO_DEVICE_ID 0x30
60#define ROBO_DEVICE_ID_5325 0x25 /* Faked */
61#define ROBO_DEVICE_ID_5395 0x95
62#define ROBO_DEVICE_ID_5397 0x97
63#define ROBO_DEVICE_ID_5398 0x98
64#define ROBO_DEVICE_ID_53115 0x3115
65
66/* Private et.o ioctls */
67#define SIOCGETCPHYRD (SIOCDEVPRIVATE + 9)
68#define SIOCSETCPHYWR (SIOCDEVPRIVATE + 10)
69
70/* Data structure for a Roboswitch device. */
71struct 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. */
83static struct robo_switch robo;
84
85
86static 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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
96    ret = robo.dev->netdev_ops->ndo_do_ioctl(robo.dev, &robo.ifr, cmd);
97#else
98    ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
99#endif
100    set_fs(old_fs);
101
102    return ret;
103}
104
105static 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
142static 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
175static 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/*
199static 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
210static __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
217static __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
225static 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
233static 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 */
243static 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
253static int robo_switch_enable(void)
254{
255    unsigned int i, last_port;
256    u16 val;
257#ifdef CONFIG_BCM47XX
258    char buf[20];
259#endif
260
261    val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
262    if (!(val & (1 << 1))) {
263        /* Unmanaged mode */
264        val &= ~(1 << 0);
265        /* With forwarding */
266        val |= (1 << 1);
267        robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
268        val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
269        if (!(val & (1 << 1))) {
270            printk("Failed to enable switch\n");
271            return -EBUSY;
272        }
273
274        last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
275                ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
276        for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
277            robo_write16(ROBO_CTRL_PAGE, i, 0);
278    }
279
280#ifdef CONFIG_BCM47XX
281    /* WAN port LED, except for Netgear WGT634U */
282    if (nvram_getenv("nvram_type", buf, sizeof(buf)) >= 0) {
283        if (strcmp(buf, "cfe") != 0)
284            robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
285    }
286#endif
287    return 0;
288}
289
290static void robo_switch_reset(void)
291{
292    if ((robo.devid == ROBO_DEVICE_ID_5395) ||
293        (robo.devid == ROBO_DEVICE_ID_5397) ||
294        (robo.devid == ROBO_DEVICE_ID_5398)) {
295        /* Trigger a software reset. */
296        robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
297        mdelay(500);
298        robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
299    }
300}
301
302static int robo_probe(char *devname)
303{
304    __u32 phyid;
305    unsigned int i;
306    int err = 1;
307
308    printk(KERN_INFO PFX "Probing device %s: ", devname);
309    strcpy(robo.ifr.ifr_name, devname);
310
311#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
312    if ((robo.dev = dev_get_by_name(devname)) == NULL) {
313#else
314    if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
315#endif
316        printk("No such device\n");
317        return 1;
318    }
319
320    robo.device = devname;
321    for (i = 0; i < 5; i++)
322        robo.port[i] = i;
323    robo.port[5] = 8;
324
325    /* try access using MII ioctls - get phy address */
326    if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
327        robo.use_et = 1;
328        robo.phy_addr = ROBO_PHY_ADDR;
329    } else {
330        /* got phy address check for robo address */
331        struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
332        if ((mii->phy_id != ROBO_PHY_ADDR) &&
333            (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
334            (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
335            printk("Invalid phy address (%d)\n", mii->phy_id);
336            goto done;
337        }
338        robo.use_et = 0;
339        /* The robo has a fixed PHY address that is different from the
340         * Tigon3 and BCM63xx PHY address. */
341        robo.phy_addr = ROBO_PHY_ADDR;
342    }
343
344    phyid = mdio_read(robo.phy_addr, 0x2) |
345        (mdio_read(robo.phy_addr, 0x3) << 16);
346
347    if (phyid == 0xffffffff || phyid == 0x55210022) {
348        printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
349        goto done;
350    }
351
352    /* Get the device ID */
353    for (i = 0; i < 10; i++) {
354        robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
355        if (robo.devid)
356            break;
357        udelay(10);
358    }
359    if (!robo.devid)
360        robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
361    robo.is_5350 = robo_vlan5350();
362
363    robo_switch_reset();
364    err = robo_switch_enable();
365    if (err)
366        goto done;
367    err = 0;
368
369    printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
370        robo.is_5350 ? " It's a 5350." : "");
371
372done:
373    if (err) {
374        dev_put(robo.dev);
375        robo.dev = NULL;
376    }
377    return err;
378}
379
380
381static int handle_vlan_port_read(void *driver, char *buf, int nr)
382{
383    __u16 val16;
384    int len = 0;
385    int j;
386
387    val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
388
389    if (robo.is_5350) {
390        u32 val32;
391        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
392        /* actual read */
393        val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
394        if ((val32 & (1 << 20)) /* valid */) {
395            for (j = 0; j < 6; j++) {
396                if (val32 & (1 << j)) {
397                    len += sprintf(buf + len, "%d", j);
398                    if (val32 & (1 << (j + 6))) {
399                        if (j == 5) buf[len++] = 'u';
400                    } else {
401                        buf[len++] = 't';
402                        if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
403                            buf[len++] = '*';
404                    }
405                    buf[len++] = '\t';
406                }
407            }
408            len += sprintf(buf + len, "\n");
409        }
410    } else {
411        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
412        /* actual read */
413        val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
414        if ((val16 & (1 << 14)) /* valid */) {
415            for (j = 0; j < 6; j++) {
416                if (val16 & (1 << j)) {
417                    len += sprintf(buf + len, "%d", j);
418                    if (val16 & (1 << (j + 7))) {
419                        if (j == 5) buf[len++] = 'u';
420                    } else {
421                        buf[len++] = 't';
422                        if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
423                            buf[len++] = '*';
424                    }
425                    buf[len++] = '\t';
426                }
427            }
428            len += sprintf(buf + len, "\n");
429        }
430    }
431
432    buf[len] = '\0';
433
434    return len;
435}
436
437static int handle_vlan_port_write(void *driver, char *buf, int nr)
438{
439    switch_driver *d = (switch_driver *) driver;
440    switch_vlan_config *c = switch_parse_vlan(d, buf);
441    int j;
442    __u16 val16;
443
444    if (c == NULL)
445        return -EINVAL;
446
447    for (j = 0; j < d->ports; j++) {
448        if ((c->untag | c->pvid) & (1 << j))
449            /* change default vlan tag */
450            robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
451    }
452
453    /* write config now */
454
455    if (robo.devid != ROBO_DEVICE_ID_5325) {
456        __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
457            (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
458
459        robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
460        robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
461        robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
462        kfree(c);
463        return 0;
464    }
465
466    val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
467    if (robo.is_5350) {
468        robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
469            (1 << 20) /* valid */ | (c->untag << 6) | c->port);
470        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
471    } else {
472        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
473            (1 << 14) /* valid */ | (c->untag << 7) | c->port);
474        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
475    }
476
477    kfree(c);
478    return 0;
479}
480
481#define set_switch(state) \
482    robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
483
484static int handle_enable_read(void *driver, char *buf, int nr)
485{
486    return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
487}
488
489static int handle_enable_write(void *driver, char *buf, int nr)
490{
491    set_switch(buf[0] == '1');
492
493    return 0;
494}
495
496static int handle_enable_vlan_read(void *driver, char *buf, int nr)
497{
498    return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
499}
500
501static int handle_enable_vlan_write(void *driver, char *buf, int nr)
502{
503    int disable = ((buf[0] != '1') ? 1 : 0);
504
505    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
506        (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
507    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
508        (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
509        0) | (1 << 2) | (1 << 3)); /* RSV multicast */
510
511    if (robo.devid != ROBO_DEVICE_ID_5325)
512        return 0;
513
514    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
515        (1 << 6) /* drop invalid VID frames */);
516    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
517        (1 << 3) /* drop miss V table frames */);
518
519    return 0;
520}
521
522static int handle_reset(void *driver, char *buf, int nr)
523{
524    switch_driver *d = (switch_driver *) driver;
525    int j;
526    __u16 val16;
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
559static 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
617static 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
626MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
627MODULE_LICENSE("GPL");
628
629module_init(robo_init);
630module_exit(robo_exit);
631

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