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#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/* 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/* Only available on brcm-2.4/brcm47xx */
72#ifdef BROADCOM
73extern char *nvram_get(const char *name);
74#define getvar(str) (nvram_get(str)?:"")
75#else
76#define getvar(str) ""
77#endif
78
79/* Data structure for a Roboswitch device. */
80struct robo_switch {
81    char *device; /* The device name string (ethX) */
82    u16 devid; /* ROBO_DEVICE_ID_53xx */
83    bool use_et;
84    bool is_5350;
85    u8 phy_addr; /* PHY address of the device */
86    struct ifreq ifr;
87    struct net_device *dev;
88    unsigned char port[6];
89};
90
91/* Currently we can only have one device in the system. */
92static struct robo_switch robo;
93
94
95static int do_ioctl(int cmd, void *buf)
96{
97    mm_segment_t old_fs = get_fs();
98    int ret;
99
100    if (buf != NULL)
101        robo.ifr.ifr_data = (caddr_t) buf;
102
103    set_fs(KERNEL_DS);
104#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
105    ret = robo.dev->netdev_ops->ndo_do_ioctl(robo.dev, &robo.ifr, cmd);
106#else
107    ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
108#endif
109    set_fs(old_fs);
110
111    return ret;
112}
113
114static u16 mdio_read(__u16 phy_id, __u8 reg)
115{
116    if (robo.use_et) {
117        int args[2] = { reg };
118
119        if (phy_id != robo.phy_addr) {
120            printk(KERN_ERR PFX
121                "Access to real 'phy' registers unavaliable.\n"
122                "Upgrade kernel driver.\n");
123
124            return 0xffff;
125        }
126
127
128        if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
129            printk(KERN_ERR PFX
130                   "[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
131            return 0xffff;
132        }
133    
134        return args[1];
135    } else {
136        struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
137        mii->phy_id = phy_id;
138        mii->reg_num = reg;
139
140        if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
141            printk(KERN_ERR PFX
142                   "[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
143
144            return 0xffff;
145        }
146
147        return mii->val_out;
148    }
149}
150
151static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
152{
153    if (robo.use_et) {
154        int args[2] = { reg, val };
155
156        if (phy_id != robo.phy_addr) {
157            printk(KERN_ERR PFX
158                "Access to real 'phy' registers unavaliable.\n"
159                "Upgrade kernel driver.\n");
160
161            return;
162        }
163        
164        if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
165            printk(KERN_ERR PFX
166                   "[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
167            return;
168        }
169    } else {
170        struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
171
172        mii->phy_id = phy_id;
173        mii->reg_num = reg;
174        mii->val_in = val;
175
176        if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
177            printk(KERN_ERR PFX
178                   "[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
179            return;
180        }
181    }
182}
183
184static int robo_reg(__u8 page, __u8 reg, __u8 op)
185{
186    int i = 3;
187    
188    /* set page number */
189    mdio_write(robo.phy_addr, REG_MII_PAGE,
190        (page << 8) | REG_MII_PAGE_ENABLE);
191    
192    /* set register address */
193    mdio_write(robo.phy_addr, REG_MII_ADDR,
194        (reg << 8) | op);
195
196    /* check if operation completed */
197    while (i--) {
198        if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
199            return 0;
200    }
201
202    printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
203    
204    return 0;
205}
206
207/*
208static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
209{
210    int i;
211    
212    robo_reg(page, reg, REG_MII_ADDR_READ);
213    
214    for (i = 0; i < count; i++)
215        val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
216}
217*/
218
219static __u16 robo_read16(__u8 page, __u8 reg)
220{
221    robo_reg(page, reg, REG_MII_ADDR_READ);
222    
223    return mdio_read(robo.phy_addr, REG_MII_DATA0);
224}
225
226static __u32 robo_read32(__u8 page, __u8 reg)
227{
228    robo_reg(page, reg, REG_MII_ADDR_READ);
229    
230    return mdio_read(robo.phy_addr, REG_MII_DATA0) +
231        (mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
232}
233
234static void robo_write16(__u8 page, __u8 reg, __u16 val16)
235{
236    /* write data */
237    mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
238
239    robo_reg(page, reg, REG_MII_ADDR_WRITE);
240}
241
242static void robo_write32(__u8 page, __u8 reg, __u32 val32)
243{
244    /* write data */
245    mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
246    mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
247    
248    robo_reg(page, reg, REG_MII_ADDR_WRITE);
249}
250
251/* checks that attached switch is 5325E/5350 */
252static int robo_vlan5350(void)
253{
254    /* set vlan access id to 15 and read it back */
255    __u16 val16 = 15;
256    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
257    
258    /* 5365 will refuse this as it does not have this reg */
259    return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
260}
261
262static int robo_switch_enable(void)
263{
264    unsigned int i, last_port;
265    u16 val;
266
267    val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
268    if (!(val & (1 << 1))) {
269        /* Unmanaged mode */
270        val &= ~(1 << 0);
271        /* With forwarding */
272        val |= (1 << 1);
273        robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
274        val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
275        if (!(val & (1 << 1))) {
276            printk("Failed to enable switch\n");
277            return -EBUSY;
278        }
279
280        last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
281                ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
282        for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
283            robo_write16(ROBO_CTRL_PAGE, i, 0);
284    }
285
286    /* WAN port LED, except for Netgear WGT634U */
287    if (strcmp(getvar("nvram_type"), "cfe") != 0)
288        robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
289
290    return 0;
291}
292
293static void robo_switch_reset(void)
294{
295    if ((robo.devid == ROBO_DEVICE_ID_5395) ||
296        (robo.devid == ROBO_DEVICE_ID_5397) ||
297        (robo.devid == ROBO_DEVICE_ID_5398)) {
298        /* Trigger a software reset. */
299        robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
300        mdelay(500);
301        robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
302    }
303}
304
305static int robo_probe(char *devname)
306{
307    __u32 phyid;
308    unsigned int i;
309    int err;
310
311    printk(KERN_INFO PFX "Probing device %s: ", devname);
312    strcpy(robo.ifr.ifr_name, devname);
313
314#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
315    if ((robo.dev = dev_get_by_name(devname)) == NULL) {
316#else
317    if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
318#endif
319        printk("No such device\n");
320        return 1;
321    }
322
323    robo.device = devname;
324    for (i = 0; i < 5; i++)
325        robo.port[i] = i;
326    robo.port[5] = 8;
327
328    /* try access using MII ioctls - get phy address */
329    if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
330        robo.use_et = 1;
331        robo.phy_addr = ROBO_PHY_ADDR;
332    } else {
333        /* got phy address check for robo address */
334        struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
335        if ((mii->phy_id != ROBO_PHY_ADDR) &&
336            (mii->phy_id != ROBO_PHY_ADDR_BCM63XX) &&
337            (mii->phy_id != ROBO_PHY_ADDR_TG3)) {
338            printk("Invalid phy address (%d)\n", mii->phy_id);
339            return 1;
340        }
341        robo.use_et = 0;
342        /* The robo has a fixed PHY address that is different from the
343         * Tigon3 and BCM63xx PHY address. */
344        robo.phy_addr = ROBO_PHY_ADDR;
345    }
346
347    phyid = mdio_read(robo.phy_addr, 0x2) |
348        (mdio_read(robo.phy_addr, 0x3) << 16);
349
350    if (phyid == 0xffffffff || phyid == 0x55210022) {
351        printk("No Robo switch in managed mode found, phy_id = 0x%08x\n", phyid);
352        return 1;
353    }
354
355    /* Get the device ID */
356    for (i = 0; i < 10; i++) {
357        robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
358        if (robo.devid)
359            break;
360        udelay(10);
361    }
362    if (!robo.devid)
363        robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
364    robo.is_5350 = robo_vlan5350();
365
366    robo_switch_reset();
367    err = robo_switch_enable();
368    if (err)
369        return err;
370
371    printk("found a 5%s%x!%s\n", robo.devid & 0xff00 ? "" : "3", robo.devid,
372        robo.is_5350 ? " It's a 5350." : "");
373    return 0;
374}
375
376
377static int handle_vlan_port_read(void *driver, char *buf, int nr)
378{
379    __u16 val16;
380    int len = 0;
381    int j;
382
383    val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
384    
385    if (robo.is_5350) {
386        u32 val32;
387        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
388        /* actual read */
389        val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
390        if ((val32 & (1 << 20)) /* valid */) {
391            for (j = 0; j < 6; j++) {
392                if (val32 & (1 << j)) {
393                    len += sprintf(buf + len, "%d", j);
394                    if (val32 & (1 << (j + 6))) {
395                        if (j == 5) buf[len++] = 'u';
396                    } else {
397                        buf[len++] = 't';
398                        if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
399                            buf[len++] = '*';
400                    }
401                    buf[len++] = '\t';
402                }
403            }
404            len += sprintf(buf + len, "\n");
405        }
406    } else {
407        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
408        /* actual read */
409        val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
410        if ((val16 & (1 << 14)) /* valid */) {
411            for (j = 0; j < 6; j++) {
412                if (val16 & (1 << j)) {
413                    len += sprintf(buf + len, "%d", j);
414                    if (val16 & (1 << (j + 7))) {
415                        if (j == 5) buf[len++] = 'u';
416                    } else {
417                        buf[len++] = 't';
418                        if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
419                            buf[len++] = '*';
420                    }
421                    buf[len++] = '\t';
422                }
423            }
424            len += sprintf(buf + len, "\n");
425        }
426    }
427
428    buf[len] = '\0';
429
430    return len;
431}
432
433static int handle_vlan_port_write(void *driver, char *buf, int nr)
434{
435    switch_driver *d = (switch_driver *) driver;
436    switch_vlan_config *c = switch_parse_vlan(d, buf);
437    int j;
438    __u16 val16;
439    
440    if (c == NULL)
441        return -EINVAL;
442
443    for (j = 0; j < d->ports; j++) {
444        if ((c->untag | c->pvid) & (1 << j))
445            /* change default vlan tag */
446            robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
447    }
448
449    /* write config now */
450
451    if (robo.devid != ROBO_DEVICE_ID_5325) {
452        __u8 regoff = ((robo.devid == ROBO_DEVICE_ID_5395) ||
453            (robo.devid == ROBO_DEVICE_ID_53115)) ? 0x20 : 0;
454
455        robo_write32(ROBO_ARLIO_PAGE, 0x63 + regoff, (c->untag << 9) | c->port);
456        robo_write16(ROBO_ARLIO_PAGE, 0x61 + regoff, nr);
457        robo_write16(ROBO_ARLIO_PAGE, 0x60 + regoff, 1 << 7);
458        return 0;
459    }
460
461    val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
462    if (robo.is_5350) {
463        robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
464            (1 << 20) /* valid */ | (c->untag << 6) | c->port);
465        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
466    } else {
467        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
468            (1 << 14) /* valid */ | (c->untag << 7) | c->port);
469        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
470    }
471
472    return 0;
473}
474
475#define set_switch(state) \
476    robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
477
478static int handle_enable_read(void *driver, char *buf, int nr)
479{
480    return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
481}
482
483static int handle_enable_write(void *driver, char *buf, int nr)
484{
485    set_switch(buf[0] == '1');
486
487    return 0;
488}
489
490static int handle_enable_vlan_read(void *driver, char *buf, int nr)
491{
492    return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
493}
494
495static int handle_enable_vlan_write(void *driver, char *buf, int nr)
496{
497    int disable = ((buf[0] != '1') ? 1 : 0);
498    
499    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
500        (1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
501    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
502        (robo.devid == ROBO_DEVICE_ID_5325 ? (1 << 1) :
503        0) | (1 << 2) | (1 << 3)); /* RSV multicast */
504
505    if (robo.devid != ROBO_DEVICE_ID_5325)
506        return 0;
507
508    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
509        (1 << 6) /* drop invalid VID frames */);
510    robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
511        (1 << 3) /* drop miss V table frames */);
512
513    return 0;
514}
515
516static int handle_reset(void *driver, char *buf, int nr)
517{
518    switch_driver *d = (switch_driver *) driver;
519    switch_vlan_config *c = switch_parse_vlan(d, buf);
520    int j;
521    __u16 val16;
522    
523    if (c == NULL)
524        return -EINVAL;
525
526    /* disable switching */
527    set_switch(0);
528
529    /* reset vlans */
530    for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
531        /* write config now */
532        val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
533        if (robo.is_5350)
534            robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
535        else
536            robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
537        robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
538                                ROBO_VLAN_TABLE_ACCESS,
539                 val16);
540    }
541
542    /* reset ports to a known good state */
543    for (j = 0; j < d->ports; j++) {
544        robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
545        robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
546    }
547
548    /* enable switching */
549    set_switch(1);
550
551    /* enable vlans */
552    handle_enable_vlan_write(driver, "1", 0);
553
554    return 0;
555}
556
557static int __init robo_init(void)
558{
559    int notfound = 1;
560    char *device;
561
562    device = strdup("ethX");
563    for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
564        if (! switch_device_registered (device))
565            notfound = robo_probe(device);
566    }
567    device[3]--;
568    
569    if (notfound) {
570        kfree(device);
571        return -ENODEV;
572    } else {
573        static const switch_config cfg[] = {
574            {
575                .name = "enable",
576                .read = handle_enable_read,
577                .write = handle_enable_write
578            }, {
579                .name = "enable_vlan",
580                .read = handle_enable_vlan_read,
581                .write = handle_enable_vlan_write
582            }, {
583                .name = "reset",
584                .read = NULL,
585                .write = handle_reset
586            }, { NULL, },
587        };
588        static const switch_config vlan[] = {
589            {
590                .name = "ports",
591                .read = handle_vlan_port_read,
592                .write = handle_vlan_port_write
593            }, { NULL, },
594        };
595        switch_driver driver = {
596            .name = DRIVER_NAME,
597            .version = DRIVER_VERSION,
598            .interface = device,
599            .cpuport = 5,
600            .ports = 6,
601            .vlans = 16,
602            .driver_handlers = cfg,
603            .port_handlers = NULL,
604            .vlan_handlers = vlan,
605        };
606        if (robo.devid != ROBO_DEVICE_ID_5325) {
607            driver.ports = 9;
608            driver.cpuport = 8;
609        }
610
611        return switch_register_driver(&driver);
612    }
613}
614
615static void __exit robo_exit(void)
616{
617    switch_unregister_driver(DRIVER_NAME);
618    kfree(robo.device);
619}
620
621
622MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
623MODULE_LICENSE("GPL");
624
625module_init(robo_init);
626module_exit(robo_exit);
627

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