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openwrt/package/switch/src/switch-robo.c

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/*
* Broadcom BCM5325E/536x switch configuration module
*
* Copyright (C) 2005 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2008 Michael Buesch <mb@bu3sch.de>
* Based on 'robocfg' by Oleg I. Vdovikin
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <linux/autoconf.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/sockios.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include "switch-core.h"
#include "etc53xx.h"
#define DRIVER_NAME "bcm53xx"
#define DRIVER_VERSION "0.02"
#define PFX "roboswitch: "
#define ROBO_PHY_ADDR 0x1E /* robo switch phy address */
#define ROBO_PHY_ADDR_TG3 0x01 /* Tigon3 PHY address */
/* MII registers */
#define REG_MII_PAGE 0x10 /* MII Page register */
#define REG_MII_ADDR 0x11 /* MII Address register */
#define REG_MII_DATA0 0x18 /* MII Data register 0 */
#define REG_MII_PAGE_ENABLE 1
#define REG_MII_ADDR_WRITE 1
#define REG_MII_ADDR_READ 2
/* Robo device ID register (in ROBO_MGMT_PAGE) */
#define ROBO_DEVICE_ID 0x30
#define ROBO_DEVICE_ID_5325 0x25 /* Faked */
#define ROBO_DEVICE_ID_5395 0x95
#define ROBO_DEVICE_ID_5397 0x97
#define ROBO_DEVICE_ID_5398 0x98
/* Private et.o ioctls */
#define SIOCGETCPHYRD (SIOCDEVPRIVATE + 9)
#define SIOCSETCPHYWR (SIOCDEVPRIVATE + 10)
/* linux 2.4 does not have 'bool' */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#define bool int
#endif
/* Data structure for a Roboswitch device. */
struct robo_switch {
char *device; /* The device name string (ethX) */
u16 devid; /* ROBO_DEVICE_ID_53xx */
bool use_et;
bool is_5350;
u8 phy_addr; /* PHY address of the device */
struct ifreq ifr;
struct net_device *dev;
unsigned char port[6];
};
/* Currently we can only have one device in the system. */
static struct robo_switch robo;
static int do_ioctl(int cmd, void *buf)
{
mm_segment_t old_fs = get_fs();
int ret;
if (buf != NULL)
robo.ifr.ifr_data = (caddr_t) buf;
set_fs(KERNEL_DS);
ret = robo.dev->do_ioctl(robo.dev, &robo.ifr, cmd);
set_fs(old_fs);
return ret;
}
static u16 mdio_read(__u16 phy_id, __u8 reg)
{
if (robo.use_et) {
int args[2] = { reg };
if (phy_id != robo.phy_addr) {
printk(KERN_ERR PFX
"Access to real 'phy' registers unavaliable.\n"
"Upgrade kernel driver.\n");
return 0xffff;
}
if (do_ioctl(SIOCGETCPHYRD, &args) < 0) {
printk(KERN_ERR PFX
"[%s:%d] SIOCGETCPHYRD failed!\n", __FILE__, __LINE__);
return 0xffff;
}
return args[1];
} else {
struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
mii->phy_id = phy_id;
mii->reg_num = reg;
if (do_ioctl(SIOCGMIIREG, NULL) < 0) {
printk(KERN_ERR PFX
"[%s:%d] SIOCGMIIREG failed!\n", __FILE__, __LINE__);
return 0xffff;
}
return mii->val_out;
}
}
static void mdio_write(__u16 phy_id, __u8 reg, __u16 val)
{
if (robo.use_et) {
int args[2] = { reg, val };
if (phy_id != robo.phy_addr) {
printk(KERN_ERR PFX
"Access to real 'phy' registers unavaliable.\n"
"Upgrade kernel driver.\n");
return;
}
if (do_ioctl(SIOCSETCPHYWR, args) < 0) {
printk(KERN_ERR PFX
"[%s:%d] SIOCGETCPHYWR failed!\n", __FILE__, __LINE__);
return;
}
} else {
struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&robo.ifr.ifr_data;
mii->phy_id = phy_id;
mii->reg_num = reg;
mii->val_in = val;
if (do_ioctl(SIOCSMIIREG, NULL) < 0) {
printk(KERN_ERR PFX
"[%s:%d] SIOCSMIIREG failed!\n", __FILE__, __LINE__);
return;
}
}
}
static int robo_reg(__u8 page, __u8 reg, __u8 op)
{
int i = 3;
/* set page number */
mdio_write(robo.phy_addr, REG_MII_PAGE,
(page << 8) | REG_MII_PAGE_ENABLE);
/* set register address */
mdio_write(robo.phy_addr, REG_MII_ADDR,
(reg << 8) | op);
/* check if operation completed */
while (i--) {
if ((mdio_read(robo.phy_addr, REG_MII_ADDR) & 3) == 0)
return 0;
}
printk(KERN_ERR PFX "[%s:%d] timeout in robo_reg!\n", __FILE__, __LINE__);
return 0;
}
/*
static void robo_read(__u8 page, __u8 reg, __u16 *val, int count)
{
int i;
robo_reg(page, reg, REG_MII_ADDR_READ);
for (i = 0; i < count; i++)
val[i] = mdio_read(robo.phy_addr, REG_MII_DATA0 + i);
}
*/
static __u16 robo_read16(__u8 page, __u8 reg)
{
robo_reg(page, reg, REG_MII_ADDR_READ);
return mdio_read(robo.phy_addr, REG_MII_DATA0);
}
static __u32 robo_read32(__u8 page, __u8 reg)
{
robo_reg(page, reg, REG_MII_ADDR_READ);
return mdio_read(robo.phy_addr, REG_MII_DATA0) +
(mdio_read(robo.phy_addr, REG_MII_DATA0 + 1) << 16);
}
static void robo_write16(__u8 page, __u8 reg, __u16 val16)
{
/* write data */
mdio_write(robo.phy_addr, REG_MII_DATA0, val16);
robo_reg(page, reg, REG_MII_ADDR_WRITE);
}
static void robo_write32(__u8 page, __u8 reg, __u32 val32)
{
/* write data */
mdio_write(robo.phy_addr, REG_MII_DATA0, val32 & 65535);
mdio_write(robo.phy_addr, REG_MII_DATA0 + 1, val32 >> 16);
robo_reg(page, reg, REG_MII_ADDR_WRITE);
}
/* checks that attached switch is 5325E/5350 */
static int robo_vlan5350(void)
{
/* set vlan access id to 15 and read it back */
__u16 val16 = 15;
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
/* 5365 will refuse this as it does not have this reg */
return (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350) == val16);
}
static int robo_switch_enable(void)
{
unsigned int i, last_port;
u16 val;
val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
if (!(val & (1 << 1))) {
/* Unmanaged mode */
val &= ~(1 << 0);
/* With forwarding */
val |= (1 << 1);
robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, val);
val = robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE);
if (!(val & (1 << 1))) {
printk("Failed to enable switch\n");
return -EBUSY;
}
last_port = (robo.devid == ROBO_DEVICE_ID_5398) ?
ROBO_PORT6_CTRL : ROBO_PORT3_CTRL;
for (i = ROBO_PORT0_CTRL; i < last_port + 1; i++)
robo_write16(ROBO_CTRL_PAGE, i, 0);
}
/* WAN port LED */
robo_write16(ROBO_CTRL_PAGE, 0x16, 0x1F);
return 0;
}
static void robo_switch_reset(void)
{
if ((robo.devid == ROBO_DEVICE_ID_5395) ||
(robo.devid == ROBO_DEVICE_ID_5397) ||
(robo.devid == ROBO_DEVICE_ID_5398)) {
/* Trigger a software reset. */
robo_write16(ROBO_CTRL_PAGE, 0x79, 0x83);
robo_write16(ROBO_CTRL_PAGE, 0x79, 0);
}
}
static int robo_probe(char *devname)
{
__u32 phyid;
unsigned int i;
int err;
printk(KERN_INFO PFX "Probing device %s: ", devname);
strcpy(robo.ifr.ifr_name, devname);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
if ((robo.dev = dev_get_by_name(devname)) == NULL) {
#else
if ((robo.dev = dev_get_by_name(&init_net, devname)) == NULL) {
#endif
printk("No such device\n");
return 1;
}
robo.device = devname;
for (i = 0; i < 5; i++)
robo.port[i] = i;
robo.port[5] = 8;
/* try access using MII ioctls - get phy address */
if (do_ioctl(SIOCGMIIPHY, NULL) < 0) {
robo.use_et = 1;
robo.phy_addr = ROBO_PHY_ADDR;
} else {
/* got phy address check for robo address */
struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &robo.ifr.ifr_data;
if ((mii->phy_id != ROBO_PHY_ADDR) &&
(mii->phy_id != ROBO_PHY_ADDR_TG3)) {
printk("Invalid phy address (%d)\n", mii->phy_id);
return 1;
}
robo.use_et = 0;
/* The robo has a fixed PHY address that is different from the
* Tigon3 PHY address. */
robo.phy_addr = ROBO_PHY_ADDR;
}
phyid = mdio_read(robo.phy_addr, 0x2) |
(mdio_read(robo.phy_addr, 0x3) << 16);
if (phyid == 0xffffffff || phyid == 0x55210022) {
printk("No Robo switch in managed mode found\n");
return 1;
}
/* Get the device ID */
for (i = 0; i < 10; i++) {
robo.devid = robo_read16(ROBO_MGMT_PAGE, ROBO_DEVICE_ID);
if (robo.devid)
break;
udelay(10);
}
if (!robo.devid)
robo.devid = ROBO_DEVICE_ID_5325; /* Fake it */
robo.is_5350 = robo_vlan5350();
robo_switch_reset();
err = robo_switch_enable();
if (err)
return err;
printk("found!\n");
return 0;
}
static int handle_vlan_port_read(void *driver, char *buf, int nr)
{
__u16 val16;
int len = 0;
int j;
val16 = (nr) /* vlan */ | (0 << 12) /* read */ | (1 << 13) /* enable */;
if (robo.is_5350) {
u32 val32;
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
/* actual read */
val32 = robo_read32(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
if ((val32 & (1 << 20)) /* valid */) {
for (j = 0; j < 6; j++) {
if (val32 & (1 << j)) {
len += sprintf(buf + len, "%d", j);
if (val32 & (1 << (j + 6))) {
if (j == 5) buf[len++] = 'u';
} else {
buf[len++] = 't';
if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
buf[len++] = '*';
}
buf[len++] = '\t';
}
}
len += sprintf(buf + len, "\n");
}
} else {
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
/* actual read */
val16 = robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_READ);
if ((val16 & (1 << 14)) /* valid */) {
for (j = 0; j < 6; j++) {
if (val16 & (1 << j)) {
len += sprintf(buf + len, "%d", j);
if (val16 & (1 << (j + 7))) {
if (j == 5) buf[len++] = 'u';
} else {
buf[len++] = 't';
if (robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1)) == nr)
buf[len++] = '*';
}
buf[len++] = '\t';
}
}
len += sprintf(buf + len, "\n");
}
}
buf[len] = '\0';
return len;
}
static int handle_vlan_port_write(void *driver, char *buf, int nr)
{
switch_driver *d = (switch_driver *) driver;
switch_vlan_config *c = switch_parse_vlan(d, buf);
int j;
__u16 val16;
if (c == NULL)
return -EINVAL;
for (j = 0; j < d->ports; j++) {
if ((c->untag | c->pvid) & (1 << j))
/* change default vlan tag */
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), nr);
}
/* write config now */
val16 = (nr) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
if (robo.is_5350) {
robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350,
(1 << 20) /* valid */ | (c->untag << 6) | c->port);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS_5350, val16);
} else {
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE,
(1 << 14) /* valid */ | (c->untag << 7) | c->port);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_TABLE_ACCESS, val16);
}
return 0;
}
#define set_switch(state) \
robo_write16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE, (robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & ~2) | (state ? 2 : 0));
static int handle_enable_read(void *driver, char *buf, int nr)
{
return sprintf(buf, "%d\n", (((robo_read16(ROBO_CTRL_PAGE, ROBO_SWITCH_MODE) & 2) == 2) ? 1 : 0));
}
static int handle_enable_write(void *driver, char *buf, int nr)
{
set_switch(buf[0] == '1');
return 0;
}
static int handle_enable_vlan_read(void *driver, char *buf, int nr)
{
return sprintf(buf, "%d\n", (((robo_read16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0) & (1 << 7)) == (1 << 7)) ? 1 : 0));
}
static int handle_enable_vlan_write(void *driver, char *buf, int nr)
{
int disable = ((buf[0] != '1') ? 1 : 0);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL0, disable ? 0 :
(1 << 7) /* 802.1Q VLAN */ | (3 << 5) /* mac check and hash */);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL1, disable ? 0 :
(1 << 1) | (1 << 2) | (1 << 3) /* RSV multicast */);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL4, disable ? 0 :
(1 << 6) /* drop invalid VID frames */);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_CTRL5, disable ? 0 :
(1 << 3) /* drop miss V table frames */);
return 0;
}
static int handle_reset(void *driver, char *buf, int nr)
{
switch_driver *d = (switch_driver *) driver;
switch_vlan_config *c = switch_parse_vlan(d, buf);
int j;
__u16 val16;
if (c == NULL)
return -EINVAL;
/* disable switching */
set_switch(0);
/* reset vlans */
for (j = 0; j <= ((robo.is_5350) ? VLAN_ID_MAX5350 : VLAN_ID_MAX); j++) {
/* write config now */
val16 = (j) /* vlan */ | (1 << 12) /* write */ | (1 << 13) /* enable */;
if (robo.is_5350)
robo_write32(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE_5350, 0);
else
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_WRITE, 0);
robo_write16(ROBO_VLAN_PAGE, robo.is_5350 ? ROBO_VLAN_TABLE_ACCESS_5350 :
ROBO_VLAN_TABLE_ACCESS,
val16);
}
/* reset ports to a known good state */
for (j = 0; j < d->ports; j++) {
robo_write16(ROBO_CTRL_PAGE, robo.port[j], 0x0000);
robo_write16(ROBO_VLAN_PAGE, ROBO_VLAN_PORT0_DEF_TAG + (j << 1), 0);
}
/* enable switching */
set_switch(1);
/* enable vlans */
handle_enable_vlan_write(driver, "1", 0);
return 0;
}
static int __init robo_init(void)
{
int notfound = 1;
char *device;
device = strdup("ethX");
for (device[3] = '0'; (device[3] <= '3') && notfound; device[3]++) {
if (! switch_device_registered (device))
notfound = robo_probe(device);
}
device[3]--;
if (notfound) {
kfree(device);
return -ENODEV;
} else {
static const switch_config cfg[] = {
{
.name = "enable",
.read = handle_enable_read,
.write = handle_enable_write
}, {
.name = "enable_vlan",
.read = handle_enable_vlan_read,
.write = handle_enable_vlan_write
}, {
.name = "reset",
.read = NULL,
.write = handle_reset
}, { NULL, },
};
static const switch_config vlan[] = {
{
.name = "ports",
.read = handle_vlan_port_read,
.write = handle_vlan_port_write
}, { NULL, },
};
switch_driver driver = {
.name = DRIVER_NAME,
.version = DRIVER_VERSION,
.interface = device,
.cpuport = 5,
.ports = 6,
.vlans = 16,
.driver_handlers = cfg,
.port_handlers = NULL,
.vlan_handlers = vlan,
};
return switch_register_driver(&driver);
}
}
static void __exit robo_exit(void)
{
switch_unregister_driver(DRIVER_NAME);
kfree(robo.device);
}
MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
MODULE_LICENSE("GPL");
module_init(robo_init);
module_exit(robo_exit);
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