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linux/drivers/net/dsa/microchip/ksz8795.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Microchip KSZ8795 switch driver
*
* Copyright (C) 2017 Microchip Technology Inc.
* Tristram Ha <Tristram.Ha@microchip.com>
*/
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_data/microchip-ksz.h>
#include <linux/phy.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>
#include <net/switchdev.h>
#include "ksz_common.h"
#include "ksz8795_reg.h"
static const struct {
char string[ETH_GSTRING_LEN];
} mib_names[TOTAL_SWITCH_COUNTER_NUM] = {
{ "rx_hi" },
{ "rx_undersize" },
{ "rx_fragments" },
{ "rx_oversize" },
{ "rx_jabbers" },
{ "rx_symbol_err" },
{ "rx_crc_err" },
{ "rx_align_err" },
{ "rx_mac_ctrl" },
{ "rx_pause" },
{ "rx_bcast" },
{ "rx_mcast" },
{ "rx_ucast" },
{ "rx_64_or_less" },
{ "rx_65_127" },
{ "rx_128_255" },
{ "rx_256_511" },
{ "rx_512_1023" },
{ "rx_1024_1522" },
{ "rx_1523_2000" },
{ "rx_2001" },
{ "tx_hi" },
{ "tx_late_col" },
{ "tx_pause" },
{ "tx_bcast" },
{ "tx_mcast" },
{ "tx_ucast" },
{ "tx_deferred" },
{ "tx_total_col" },
{ "tx_exc_col" },
{ "tx_single_col" },
{ "tx_mult_col" },
{ "rx_total" },
{ "tx_total" },
{ "rx_discards" },
{ "tx_discards" },
};
static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
{
regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
}
static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
bool set)
{
regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset),
bits, set ? bits : 0);
}
static int ksz8795_reset_switch(struct ksz_device *dev)
{
/* reset switch */
ksz_write8(dev, REG_POWER_MANAGEMENT_1,
SW_SOFTWARE_POWER_DOWN << SW_POWER_MANAGEMENT_MODE_S);
ksz_write8(dev, REG_POWER_MANAGEMENT_1, 0);
return 0;
}
static void ksz8795_set_prio_queue(struct ksz_device *dev, int port, int queue)
{
u8 hi, lo;
/* Number of queues can only be 1, 2, or 4. */
switch (queue) {
case 4:
case 3:
queue = PORT_QUEUE_SPLIT_4;
break;
case 2:
queue = PORT_QUEUE_SPLIT_2;
break;
default:
queue = PORT_QUEUE_SPLIT_1;
}
ksz_pread8(dev, port, REG_PORT_CTRL_0, &lo);
ksz_pread8(dev, port, P_DROP_TAG_CTRL, &hi);
lo &= ~PORT_QUEUE_SPLIT_L;
if (queue & PORT_QUEUE_SPLIT_2)
lo |= PORT_QUEUE_SPLIT_L;
hi &= ~PORT_QUEUE_SPLIT_H;
if (queue & PORT_QUEUE_SPLIT_4)
hi |= PORT_QUEUE_SPLIT_H;
ksz_pwrite8(dev, port, REG_PORT_CTRL_0, lo);
ksz_pwrite8(dev, port, P_DROP_TAG_CTRL, hi);
/* Default is port based for egress rate limit. */
if (queue != PORT_QUEUE_SPLIT_1)
ksz_cfg(dev, REG_SW_CTRL_19, SW_OUT_RATE_LIMIT_QUEUE_BASED,
true);
}
static void ksz8795_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
u64 *cnt)
{
u16 ctrl_addr;
u32 data;
u8 check;
int loop;
ctrl_addr = addr + SWITCH_COUNTER_NUM * port;
ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ);
mutex_lock(&dev->alu_mutex);
ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
/* It is almost guaranteed to always read the valid bit because of
* slow SPI speed.
*/
for (loop = 2; loop > 0; loop--) {
ksz_read8(dev, REG_IND_MIB_CHECK, &check);
if (check & MIB_COUNTER_VALID) {
ksz_read32(dev, REG_IND_DATA_LO, &data);
if (check & MIB_COUNTER_OVERFLOW)
*cnt += MIB_COUNTER_VALUE + 1;
*cnt += data & MIB_COUNTER_VALUE;
break;
}
}
mutex_unlock(&dev->alu_mutex);
}
static void ksz8795_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
u64 *dropped, u64 *cnt)
{
u16 ctrl_addr;
u32 data;
u8 check;
int loop;
addr -= SWITCH_COUNTER_NUM;
ctrl_addr = (KS_MIB_TOTAL_RX_1 - KS_MIB_TOTAL_RX_0) * port;
ctrl_addr += addr + KS_MIB_TOTAL_RX_0;
ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ);
mutex_lock(&dev->alu_mutex);
ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
/* It is almost guaranteed to always read the valid bit because of
* slow SPI speed.
*/
for (loop = 2; loop > 0; loop--) {
ksz_read8(dev, REG_IND_MIB_CHECK, &check);
if (check & MIB_COUNTER_VALID) {
ksz_read32(dev, REG_IND_DATA_LO, &data);
if (addr < 2) {
u64 total;
total = check & MIB_TOTAL_BYTES_H;
total <<= 32;
*cnt += total;
*cnt += data;
if (check & MIB_COUNTER_OVERFLOW) {
total = MIB_TOTAL_BYTES_H + 1;
total <<= 32;
*cnt += total;
}
} else {
if (check & MIB_COUNTER_OVERFLOW)
*cnt += MIB_PACKET_DROPPED + 1;
*cnt += data & MIB_PACKET_DROPPED;
}
break;
}
}
mutex_unlock(&dev->alu_mutex);
}
static void ksz8795_freeze_mib(struct ksz_device *dev, int port, bool freeze)
{
/* enable the port for flush/freeze function */
if (freeze)
ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true);
ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FREEZE, freeze);
/* disable the port after freeze is done */
if (!freeze)
ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false);
}
static void ksz8795_port_init_cnt(struct ksz_device *dev, int port)
{
struct ksz_port_mib *mib = &dev->ports[port].mib;
/* flush all enabled port MIB counters */
ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true);
ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FLUSH, true);
ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false);
mib->cnt_ptr = 0;
/* Some ports may not have MIB counters before SWITCH_COUNTER_NUM. */
while (mib->cnt_ptr < dev->reg_mib_cnt) {
dev->dev_ops->r_mib_cnt(dev, port, mib->cnt_ptr,
&mib->counters[mib->cnt_ptr]);
++mib->cnt_ptr;
}
/* Some ports may not have MIB counters after SWITCH_COUNTER_NUM. */
while (mib->cnt_ptr < dev->mib_cnt) {
dev->dev_ops->r_mib_pkt(dev, port, mib->cnt_ptr,
NULL, &mib->counters[mib->cnt_ptr]);
++mib->cnt_ptr;
}
mib->cnt_ptr = 0;
memset(mib->counters, 0, dev->mib_cnt * sizeof(u64));
}
static void ksz8795_r_table(struct ksz_device *dev, int table, u16 addr,
u64 *data)
{
u16 ctrl_addr;
ctrl_addr = IND_ACC_TABLE(table | TABLE_READ) | addr;
mutex_lock(&dev->alu_mutex);
ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
ksz_read64(dev, REG_IND_DATA_HI, data);
mutex_unlock(&dev->alu_mutex);
}
static void ksz8795_w_table(struct ksz_device *dev, int table, u16 addr,
u64 data)
{
u16 ctrl_addr;
ctrl_addr = IND_ACC_TABLE(table) | addr;
mutex_lock(&dev->alu_mutex);
ksz_write64(dev, REG_IND_DATA_HI, data);
ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
mutex_unlock(&dev->alu_mutex);
}
static int ksz8795_valid_dyn_entry(struct ksz_device *dev, u8 *data)
{
int timeout = 100;
do {
ksz_read8(dev, REG_IND_DATA_CHECK, data);
timeout--;
} while ((*data & DYNAMIC_MAC_TABLE_NOT_READY) && timeout);
/* Entry is not ready for accessing. */
if (*data & DYNAMIC_MAC_TABLE_NOT_READY) {
return -EAGAIN;
/* Entry is ready for accessing. */
} else {
ksz_read8(dev, REG_IND_DATA_8, data);
/* There is no valid entry in the table. */
if (*data & DYNAMIC_MAC_TABLE_MAC_EMPTY)
return -ENXIO;
}
return 0;
}
static int ksz8795_r_dyn_mac_table(struct ksz_device *dev, u16 addr,
u8 *mac_addr, u8 *fid, u8 *src_port,
u8 *timestamp, u16 *entries)
{
u32 data_hi, data_lo;
u16 ctrl_addr;
u8 data;
int rc;
ctrl_addr = IND_ACC_TABLE(TABLE_DYNAMIC_MAC | TABLE_READ) | addr;
mutex_lock(&dev->alu_mutex);
ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
rc = ksz8795_valid_dyn_entry(dev, &data);
if (rc == -EAGAIN) {
if (addr == 0)
*entries = 0;
} else if (rc == -ENXIO) {
*entries = 0;
/* At least one valid entry in the table. */
} else {
u64 buf = 0;
int cnt;
ksz_read64(dev, REG_IND_DATA_HI, &buf);
data_hi = (u32)(buf >> 32);
data_lo = (u32)buf;
/* Check out how many valid entry in the table. */
cnt = data & DYNAMIC_MAC_TABLE_ENTRIES_H;
cnt <<= DYNAMIC_MAC_ENTRIES_H_S;
cnt |= (data_hi & DYNAMIC_MAC_TABLE_ENTRIES) >>
DYNAMIC_MAC_ENTRIES_S;
*entries = cnt + 1;
*fid = (data_hi & DYNAMIC_MAC_TABLE_FID) >>
DYNAMIC_MAC_FID_S;
*src_port = (data_hi & DYNAMIC_MAC_TABLE_SRC_PORT) >>
DYNAMIC_MAC_SRC_PORT_S;
*timestamp = (data_hi & DYNAMIC_MAC_TABLE_TIMESTAMP) >>
DYNAMIC_MAC_TIMESTAMP_S;
mac_addr[5] = (u8)data_lo;
mac_addr[4] = (u8)(data_lo >> 8);
mac_addr[3] = (u8)(data_lo >> 16);
mac_addr[2] = (u8)(data_lo >> 24);
mac_addr[1] = (u8)data_hi;
mac_addr[0] = (u8)(data_hi >> 8);
rc = 0;
}
mutex_unlock(&dev->alu_mutex);
return rc;
}
static int ksz8795_r_sta_mac_table(struct ksz_device *dev, u16 addr,
struct alu_struct *alu)
{
u32 data_hi, data_lo;
u64 data;
ksz8795_r_table(dev, TABLE_STATIC_MAC, addr, &data);
data_hi = data >> 32;
data_lo = (u32)data;
if (data_hi & (STATIC_MAC_TABLE_VALID | STATIC_MAC_TABLE_OVERRIDE)) {
alu->mac[5] = (u8)data_lo;
alu->mac[4] = (u8)(data_lo >> 8);
alu->mac[3] = (u8)(data_lo >> 16);
alu->mac[2] = (u8)(data_lo >> 24);
alu->mac[1] = (u8)data_hi;
alu->mac[0] = (u8)(data_hi >> 8);
alu->port_forward = (data_hi & STATIC_MAC_TABLE_FWD_PORTS) >>
STATIC_MAC_FWD_PORTS_S;
alu->is_override =
(data_hi & STATIC_MAC_TABLE_OVERRIDE) ? 1 : 0;
data_hi >>= 1;
alu->is_use_fid = (data_hi & STATIC_MAC_TABLE_USE_FID) ? 1 : 0;
alu->fid = (data_hi & STATIC_MAC_TABLE_FID) >>
STATIC_MAC_FID_S;
return 0;
}
return -ENXIO;
}
static void ksz8795_w_sta_mac_table(struct ksz_device *dev, u16 addr,
struct alu_struct *alu)
{
u32 data_hi, data_lo;
u64 data;
data_lo = ((u32)alu->mac[2] << 24) |
((u32)alu->mac[3] << 16) |
((u32)alu->mac[4] << 8) | alu->mac[5];
data_hi = ((u32)alu->mac[0] << 8) | alu->mac[1];
data_hi |= (u32)alu->port_forward << STATIC_MAC_FWD_PORTS_S;
if (alu->is_override)
data_hi |= STATIC_MAC_TABLE_OVERRIDE;
if (alu->is_use_fid) {
data_hi |= STATIC_MAC_TABLE_USE_FID;
data_hi |= (u32)alu->fid << STATIC_MAC_FID_S;
}
if (alu->is_static)
data_hi |= STATIC_MAC_TABLE_VALID;
else
data_hi &= ~STATIC_MAC_TABLE_OVERRIDE;
data = (u64)data_hi << 32 | data_lo;
ksz8795_w_table(dev, TABLE_STATIC_MAC, addr, data);
}
static void ksz8795_from_vlan(u16 vlan, u8 *fid, u8 *member, u8 *valid)
{
*fid = vlan & VLAN_TABLE_FID;
*member = (vlan & VLAN_TABLE_MEMBERSHIP) >> VLAN_TABLE_MEMBERSHIP_S;
*valid = !!(vlan & VLAN_TABLE_VALID);
}
static void ksz8795_to_vlan(u8 fid, u8 member, u8 valid, u16 *vlan)
{
*vlan = fid;
*vlan |= (u16)member << VLAN_TABLE_MEMBERSHIP_S;
if (valid)
*vlan |= VLAN_TABLE_VALID;
}
static void ksz8795_r_vlan_entries(struct ksz_device *dev, u16 addr)
{
u64 data;
int i;
ksz8795_r_table(dev, TABLE_VLAN, addr, &data);
addr *= 4;
for (i = 0; i < 4; i++) {
dev->vlan_cache[addr + i].table[0] = (u16)data;
data >>= VLAN_TABLE_S;
}
}
static void ksz8795_r_vlan_table(struct ksz_device *dev, u16 vid, u16 *vlan)
{
int index;
u16 *data;
u16 addr;
u64 buf;
data = (u16 *)&buf;
addr = vid / 4;
index = vid & 3;
ksz8795_r_table(dev, TABLE_VLAN, addr, &buf);
*vlan = data[index];
}
static void ksz8795_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
{
int index;
u16 *data;
u16 addr;
u64 buf;
data = (u16 *)&buf;
addr = vid / 4;
index = vid & 3;
ksz8795_r_table(dev, TABLE_VLAN, addr, &buf);
data[index] = vlan;
dev->vlan_cache[vid].table[0] = vlan;
ksz8795_w_table(dev, TABLE_VLAN, addr, buf);
}
static void ksz8795_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
{
u8 restart, speed, ctrl, link;
int processed = true;
u16 data = 0;
u8 p = phy;
switch (reg) {
case PHY_REG_CTRL:
ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart);
ksz_pread8(dev, p, P_SPEED_STATUS, &speed);
ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl);
if (restart & PORT_PHY_LOOPBACK)
data |= PHY_LOOPBACK;
if (ctrl & PORT_FORCE_100_MBIT)
data |= PHY_SPEED_100MBIT;
if (!(ctrl & PORT_AUTO_NEG_DISABLE))
data |= PHY_AUTO_NEG_ENABLE;
if (restart & PORT_POWER_DOWN)
data |= PHY_POWER_DOWN;
if (restart & PORT_AUTO_NEG_RESTART)
data |= PHY_AUTO_NEG_RESTART;
if (ctrl & PORT_FORCE_FULL_DUPLEX)
data |= PHY_FULL_DUPLEX;
if (speed & PORT_HP_MDIX)
data |= PHY_HP_MDIX;
if (restart & PORT_FORCE_MDIX)
data |= PHY_FORCE_MDIX;
if (restart & PORT_AUTO_MDIX_DISABLE)
data |= PHY_AUTO_MDIX_DISABLE;
if (restart & PORT_TX_DISABLE)
data |= PHY_TRANSMIT_DISABLE;
if (restart & PORT_LED_OFF)
data |= PHY_LED_DISABLE;
break;
case PHY_REG_STATUS:
ksz_pread8(dev, p, P_LINK_STATUS, &link);
data = PHY_100BTX_FD_CAPABLE |
PHY_100BTX_CAPABLE |
PHY_10BT_FD_CAPABLE |
PHY_10BT_CAPABLE |
PHY_AUTO_NEG_CAPABLE;
if (link & PORT_AUTO_NEG_COMPLETE)
data |= PHY_AUTO_NEG_ACKNOWLEDGE;
if (link & PORT_STAT_LINK_GOOD)
data |= PHY_LINK_STATUS;
break;
case PHY_REG_ID_1:
data = KSZ8795_ID_HI;
break;
case PHY_REG_ID_2:
data = KSZ8795_ID_LO;
break;
case PHY_REG_AUTO_NEGOTIATION:
ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl);
data = PHY_AUTO_NEG_802_3;
if (ctrl & PORT_AUTO_NEG_SYM_PAUSE)
data |= PHY_AUTO_NEG_SYM_PAUSE;
if (ctrl & PORT_AUTO_NEG_100BTX_FD)
data |= PHY_AUTO_NEG_100BTX_FD;
if (ctrl & PORT_AUTO_NEG_100BTX)
data |= PHY_AUTO_NEG_100BTX;
if (ctrl & PORT_AUTO_NEG_10BT_FD)
data |= PHY_AUTO_NEG_10BT_FD;
if (ctrl & PORT_AUTO_NEG_10BT)
data |= PHY_AUTO_NEG_10BT;
break;
case PHY_REG_REMOTE_CAPABILITY:
ksz_pread8(dev, p, P_REMOTE_STATUS, &link);
data = PHY_AUTO_NEG_802_3;
if (link & PORT_REMOTE_SYM_PAUSE)
data |= PHY_AUTO_NEG_SYM_PAUSE;
if (link & PORT_REMOTE_100BTX_FD)
data |= PHY_AUTO_NEG_100BTX_FD;
if (link & PORT_REMOTE_100BTX)
data |= PHY_AUTO_NEG_100BTX;
if (link & PORT_REMOTE_10BT_FD)
data |= PHY_AUTO_NEG_10BT_FD;
if (link & PORT_REMOTE_10BT)
data |= PHY_AUTO_NEG_10BT;
if (data & ~PHY_AUTO_NEG_802_3)
data |= PHY_REMOTE_ACKNOWLEDGE_NOT;
break;
default:
processed = false;
break;
}
if (processed)
*val = data;
}
static void ksz8795_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
{
u8 p = phy;
u8 restart, speed, ctrl, data;
switch (reg) {
case PHY_REG_CTRL:
/* Do not support PHY reset function. */
if (val & PHY_RESET)
break;
ksz_pread8(dev, p, P_SPEED_STATUS, &speed);
data = speed;
if (val & PHY_HP_MDIX)
data |= PORT_HP_MDIX;
else
data &= ~PORT_HP_MDIX;
if (data != speed)
ksz_pwrite8(dev, p, P_SPEED_STATUS, data);
ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl);
data = ctrl;
if (!(val & PHY_AUTO_NEG_ENABLE))
data |= PORT_AUTO_NEG_DISABLE;
else
data &= ~PORT_AUTO_NEG_DISABLE;
/* Fiber port does not support auto-negotiation. */
if (dev->ports[p].fiber)
data |= PORT_AUTO_NEG_DISABLE;
if (val & PHY_SPEED_100MBIT)
data |= PORT_FORCE_100_MBIT;
else
data &= ~PORT_FORCE_100_MBIT;
if (val & PHY_FULL_DUPLEX)
data |= PORT_FORCE_FULL_DUPLEX;
else
data &= ~PORT_FORCE_FULL_DUPLEX;
if (data != ctrl)
ksz_pwrite8(dev, p, P_FORCE_CTRL, data);
ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart);
data = restart;
if (val & PHY_LED_DISABLE)
data |= PORT_LED_OFF;
else
data &= ~PORT_LED_OFF;
if (val & PHY_TRANSMIT_DISABLE)
data |= PORT_TX_DISABLE;
else
data &= ~PORT_TX_DISABLE;
if (val & PHY_AUTO_NEG_RESTART)
data |= PORT_AUTO_NEG_RESTART;
else
data &= ~(PORT_AUTO_NEG_RESTART);
if (val & PHY_POWER_DOWN)
data |= PORT_POWER_DOWN;
else
data &= ~PORT_POWER_DOWN;
if (val & PHY_AUTO_MDIX_DISABLE)
data |= PORT_AUTO_MDIX_DISABLE;
else
data &= ~PORT_AUTO_MDIX_DISABLE;
if (val & PHY_FORCE_MDIX)
data |= PORT_FORCE_MDIX;
else
data &= ~PORT_FORCE_MDIX;
if (val & PHY_LOOPBACK)
data |= PORT_PHY_LOOPBACK;
else
data &= ~PORT_PHY_LOOPBACK;
if (data != restart)
ksz_pwrite8(dev, p, P_NEG_RESTART_CTRL, data);
break;
case PHY_REG_AUTO_NEGOTIATION:
ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl);
data = ctrl;
data &= ~(PORT_AUTO_NEG_SYM_PAUSE |
PORT_AUTO_NEG_100BTX_FD |
PORT_AUTO_NEG_100BTX |
PORT_AUTO_NEG_10BT_FD |
PORT_AUTO_NEG_10BT);
if (val & PHY_AUTO_NEG_SYM_PAUSE)
data |= PORT_AUTO_NEG_SYM_PAUSE;
if (val & PHY_AUTO_NEG_100BTX_FD)
data |= PORT_AUTO_NEG_100BTX_FD;
if (val & PHY_AUTO_NEG_100BTX)
data |= PORT_AUTO_NEG_100BTX;
if (val & PHY_AUTO_NEG_10BT_FD)
data |= PORT_AUTO_NEG_10BT_FD;
if (val & PHY_AUTO_NEG_10BT)
data |= PORT_AUTO_NEG_10BT;
if (data != ctrl)
ksz_pwrite8(dev, p, P_LOCAL_CTRL, data);
break;
default:
break;
}
}
static enum dsa_tag_protocol ksz8795_get_tag_protocol(struct dsa_switch *ds,
int port,
enum dsa_tag_protocol mp)
{
return DSA_TAG_PROTO_KSZ8795;
}
static void ksz8795_get_strings(struct dsa_switch *ds, int port,
u32 stringset, uint8_t *buf)
{
int i;
for (i = 0; i < TOTAL_SWITCH_COUNTER_NUM; i++) {
memcpy(buf + i * ETH_GSTRING_LEN, mib_names[i].string,
ETH_GSTRING_LEN);
}
}
static void ksz8795_cfg_port_member(struct ksz_device *dev, int port,
u8 member)
{
u8 data;
ksz_pread8(dev, port, P_MIRROR_CTRL, &data);
data &= ~PORT_VLAN_MEMBERSHIP;
data |= (member & dev->port_mask);
ksz_pwrite8(dev, port, P_MIRROR_CTRL, data);
dev->ports[port].member = member;
}
static void ksz8795_port_stp_state_set(struct dsa_switch *ds, int port,
u8 state)
{
struct ksz_device *dev = ds->priv;
int forward = dev->member;
struct ksz_port *p;
int member = -1;
u8 data;
p = &dev->ports[port];
ksz_pread8(dev, port, P_STP_CTRL, &data);
data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
switch (state) {
case BR_STATE_DISABLED:
data |= PORT_LEARN_DISABLE;
if (port < SWITCH_PORT_NUM)
member = 0;
break;
case BR_STATE_LISTENING:
data |= (PORT_RX_ENABLE | PORT_LEARN_DISABLE);
if (port < SWITCH_PORT_NUM &&
p->stp_state == BR_STATE_DISABLED)
member = dev->host_mask | p->vid_member;
break;
case BR_STATE_LEARNING:
data |= PORT_RX_ENABLE;
break;
case BR_STATE_FORWARDING:
data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
/* This function is also used internally. */
if (port == dev->cpu_port)
break;
/* Port is a member of a bridge. */
if (dev->br_member & BIT(port)) {
dev->member |= BIT(port);
member = dev->member;
} else {
member = dev->host_mask | p->vid_member;
}
break;
case BR_STATE_BLOCKING:
data |= PORT_LEARN_DISABLE;
if (port < SWITCH_PORT_NUM &&
p->stp_state == BR_STATE_DISABLED)
member = dev->host_mask | p->vid_member;
break;
default:
dev_err(ds->dev, "invalid STP state: %d\n", state);
return;
}
ksz_pwrite8(dev, port, P_STP_CTRL, data);
p->stp_state = state;
/* Port membership may share register with STP state. */
if (member >= 0 && member != p->member)
ksz8795_cfg_port_member(dev, port, (u8)member);
/* Check if forwarding needs to be updated. */
if (state != BR_STATE_FORWARDING) {
if (dev->br_member & BIT(port))
dev->member &= ~BIT(port);
}
/* When topology has changed the function ksz_update_port_member
* should be called to modify port forwarding behavior.
*/
if (forward != dev->member)
ksz_update_port_member(dev, port);
}
static void ksz8795_flush_dyn_mac_table(struct ksz_device *dev, int port)
{
u8 learn[TOTAL_PORT_NUM];
int first, index, cnt;
struct ksz_port *p;
if ((uint)port < TOTAL_PORT_NUM) {
first = port;
cnt = port + 1;
} else {
/* Flush all ports. */
first = 0;
cnt = dev->mib_port_cnt;
}
for (index = first; index < cnt; index++) {
p = &dev->ports[index];
if (!p->on)
continue;
ksz_pread8(dev, index, P_STP_CTRL, &learn[index]);
if (!(learn[index] & PORT_LEARN_DISABLE))
ksz_pwrite8(dev, index, P_STP_CTRL,
learn[index] | PORT_LEARN_DISABLE);
}
ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
for (index = first; index < cnt; index++) {
p = &dev->ports[index];
if (!p->on)
continue;
if (!(learn[index] & PORT_LEARN_DISABLE))
ksz_pwrite8(dev, index, P_STP_CTRL, learn[index]);
}
}
static int ksz8795_port_vlan_filtering(struct dsa_switch *ds, int port,
bool flag)
{
struct ksz_device *dev = ds->priv;
ksz_cfg(dev, S_MIRROR_CTRL, SW_VLAN_ENABLE, flag);
return 0;
}
static void ksz8795_port_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct ksz_device *dev = ds->priv;
u16 data, vid, new_pvid = 0;
u8 fid, member, valid;
ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
ksz8795_r_vlan_table(dev, vid, &data);
ksz8795_from_vlan(data, &fid, &member, &valid);
/* First time to setup the VLAN entry. */
if (!valid) {
/* Need to find a way to map VID to FID. */
fid = 1;
valid = 1;
}
member |= BIT(port);
ksz8795_to_vlan(fid, member, valid, &data);
ksz8795_w_vlan_table(dev, vid, data);
/* change PVID */
if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
new_pvid = vid;
}
if (new_pvid) {
ksz_pread16(dev, port, REG_PORT_CTRL_VID, &vid);
vid &= 0xfff;
vid |= new_pvid;
ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, vid);
}
}
static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct ksz_device *dev = ds->priv;
u16 data, vid, pvid, new_pvid = 0;
u8 fid, member, valid;
ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid);
pvid = pvid & 0xFFF;
ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
ksz8795_r_vlan_table(dev, vid, &data);
ksz8795_from_vlan(data, &fid, &member, &valid);
member &= ~BIT(port);
/* Invalidate the entry if no more member. */
if (!member) {
fid = 0;
valid = 0;
}
if (pvid == vid)
new_pvid = 1;
ksz8795_to_vlan(fid, member, valid, &data);
ksz8795_w_vlan_table(dev, vid, data);
}
if (new_pvid != pvid)
ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, pvid);
return 0;
}
static int ksz8795_port_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror,
bool ingress)
{
struct ksz_device *dev = ds->priv;
if (ingress) {
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
dev->mirror_rx |= BIT(port);
} else {
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);
dev->mirror_tx |= BIT(port);
}
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);
/* configure mirror port */
if (dev->mirror_rx || dev->mirror_tx)
ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
PORT_MIRROR_SNIFFER, true);
return 0;
}
static void ksz8795_port_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror)
{
struct ksz_device *dev = ds->priv;
u8 data;
if (mirror->ingress) {
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
dev->mirror_rx &= ~BIT(port);
} else {
ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);
dev->mirror_tx &= ~BIT(port);
}
ksz_pread8(dev, port, P_MIRROR_CTRL, &data);
if (!dev->mirror_rx && !dev->mirror_tx)
ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
PORT_MIRROR_SNIFFER, false);
}
static void ksz8795_port_setup(struct ksz_device *dev, int port, bool cpu_port)
{
struct ksz_port *p = &dev->ports[port];
u8 data8, member;
/* enable broadcast storm limit */
ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true);
ksz8795_set_prio_queue(dev, port, 4);
/* disable DiffServ priority */
ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_DIFFSERV_ENABLE, false);
/* replace priority */
ksz_port_cfg(dev, port, P_802_1P_CTRL, PORT_802_1P_REMAPPING, false);
/* enable 802.1p priority */
ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_ENABLE, true);
if (cpu_port) {
/* Configure MII interface for proper network communication. */
ksz_read8(dev, REG_PORT_5_CTRL_6, &data8);
data8 &= ~PORT_INTERFACE_TYPE;
data8 &= ~PORT_GMII_1GPS_MODE;
switch (dev->interface) {
case PHY_INTERFACE_MODE_MII:
p->phydev.speed = SPEED_100;
break;
case PHY_INTERFACE_MODE_RMII:
data8 |= PORT_INTERFACE_RMII;
p->phydev.speed = SPEED_100;
break;
case PHY_INTERFACE_MODE_GMII:
data8 |= PORT_GMII_1GPS_MODE;
data8 |= PORT_INTERFACE_GMII;
p->phydev.speed = SPEED_1000;
break;
default:
data8 &= ~PORT_RGMII_ID_IN_ENABLE;
data8 &= ~PORT_RGMII_ID_OUT_ENABLE;
if (dev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
dev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
data8 |= PORT_RGMII_ID_IN_ENABLE;
if (dev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
dev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
data8 |= PORT_RGMII_ID_OUT_ENABLE;
data8 |= PORT_GMII_1GPS_MODE;
data8 |= PORT_INTERFACE_RGMII;
p->phydev.speed = SPEED_1000;
break;
}
ksz_write8(dev, REG_PORT_5_CTRL_6, data8);
p->phydev.duplex = 1;
member = dev->port_mask;
} else {
member = dev->host_mask | p->vid_member;
}
ksz8795_cfg_port_member(dev, port, member);
}
static void ksz8795_config_cpu_port(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
struct ksz_port *p;
u8 remote;
int i;
ds->num_ports = dev->port_cnt + 1;
/* Switch marks the maximum frame with extra byte as oversize. */
ksz_cfg(dev, REG_SW_CTRL_2, SW_LEGAL_PACKET_DISABLE, true);
ksz_cfg(dev, S_TAIL_TAG_CTRL, SW_TAIL_TAG_ENABLE, true);
p = &dev->ports[dev->cpu_port];
p->vid_member = dev->port_mask;
p->on = 1;
ksz8795_port_setup(dev, dev->cpu_port, true);
dev->member = dev->host_mask;
for (i = 0; i < SWITCH_PORT_NUM; i++) {
p = &dev->ports[i];
/* Initialize to non-zero so that ksz_cfg_port_member() will
* be called.
*/
p->vid_member = BIT(i);
p->member = dev->port_mask;
ksz8795_port_stp_state_set(ds, i, BR_STATE_DISABLED);
/* Last port may be disabled. */
if (i == dev->port_cnt)
break;
p->on = 1;
p->phy = 1;
}
for (i = 0; i < dev->phy_port_cnt; i++) {
p = &dev->ports[i];
if (!p->on)
continue;
ksz_pread8(dev, i, P_REMOTE_STATUS, &remote);
if (remote & PORT_FIBER_MODE)
p->fiber = 1;
if (p->fiber)
ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL,
true);
else
ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL,
false);
}
}
static int ksz8795_setup(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
struct alu_struct alu;
int i, ret = 0;
dev->vlan_cache = devm_kcalloc(dev->dev, sizeof(struct vlan_table),
dev->num_vlans, GFP_KERNEL);
if (!dev->vlan_cache)
return -ENOMEM;
ret = ksz8795_reset_switch(dev);
if (ret) {
dev_err(ds->dev, "failed to reset switch\n");
return ret;
}
ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true);
/* Enable automatic fast aging when link changed detected. */
ksz_cfg(dev, S_LINK_AGING_CTRL, SW_LINK_AUTO_AGING, true);
/* Enable aggressive back off algorithm in half duplex mode. */
regmap_update_bits(dev->regmap[0], REG_SW_CTRL_1,
SW_AGGR_BACKOFF, SW_AGGR_BACKOFF);
/*
* Make sure unicast VLAN boundary is set as default and
* enable no excessive collision drop.
*/
regmap_update_bits(dev->regmap[0], REG_SW_CTRL_2,
UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP,
UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP);
ksz8795_config_cpu_port(ds);
ksz_cfg(dev, REG_SW_CTRL_2, MULTICAST_STORM_DISABLE, true);
ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_REPLACE_VID, false);
ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
/* set broadcast storm protection 10% rate */
regmap_update_bits(dev->regmap[1], S_REPLACE_VID_CTRL,
BROADCAST_STORM_RATE,
(BROADCAST_STORM_VALUE *
BROADCAST_STORM_PROT_RATE) / 100);
for (i = 0; i < VLAN_TABLE_ENTRIES; i++)
ksz8795_r_vlan_entries(dev, i);
/* Setup STP address for STP operation. */
memset(&alu, 0, sizeof(alu));
ether_addr_copy(alu.mac, eth_stp_addr);
alu.is_static = true;
alu.is_override = true;
alu.port_forward = dev->host_mask;
ksz8795_w_sta_mac_table(dev, 0, &alu);
ksz_init_mib_timer(dev);
return 0;
}
static const struct dsa_switch_ops ksz8795_switch_ops = {
.get_tag_protocol = ksz8795_get_tag_protocol,
.setup = ksz8795_setup,
.phy_read = ksz_phy_read16,
.phy_write = ksz_phy_write16,
.phylink_mac_link_down = ksz_mac_link_down,
.port_enable = ksz_enable_port,
.get_strings = ksz8795_get_strings,
.get_ethtool_stats = ksz_get_ethtool_stats,
.get_sset_count = ksz_sset_count,
.port_bridge_join = ksz_port_bridge_join,
.port_bridge_leave = ksz_port_bridge_leave,
.port_stp_state_set = ksz8795_port_stp_state_set,
.port_fast_age = ksz_port_fast_age,
.port_vlan_filtering = ksz8795_port_vlan_filtering,
.port_vlan_prepare = ksz_port_vlan_prepare,
.port_vlan_add = ksz8795_port_vlan_add,
.port_vlan_del = ksz8795_port_vlan_del,
.port_fdb_dump = ksz_port_fdb_dump,
.port_mdb_prepare = ksz_port_mdb_prepare,
.port_mdb_add = ksz_port_mdb_add,
.port_mdb_del = ksz_port_mdb_del,
.port_mirror_add = ksz8795_port_mirror_add,
.port_mirror_del = ksz8795_port_mirror_del,
};
static u32 ksz8795_get_port_addr(int port, int offset)
{
return PORT_CTRL_ADDR(port, offset);
}
static int ksz8795_switch_detect(struct ksz_device *dev)
{
u8 id1, id2;
u16 id16;
int ret;
/* read chip id */
ret = ksz_read16(dev, REG_CHIP_ID0, &id16);
if (ret)
return ret;
id1 = id16 >> 8;
id2 = id16 & SW_CHIP_ID_M;
if (id1 != FAMILY_ID ||
(id2 != CHIP_ID_94 && id2 != CHIP_ID_95))
return -ENODEV;
dev->mib_port_cnt = TOTAL_PORT_NUM;
dev->phy_port_cnt = SWITCH_PORT_NUM;
dev->port_cnt = SWITCH_PORT_NUM;
if (id2 == CHIP_ID_95) {
u8 val;
id2 = 0x95;
ksz_read8(dev, REG_PORT_1_STATUS_0, &val);
if (val & PORT_FIBER_MODE)
id2 = 0x65;
} else if (id2 == CHIP_ID_94) {
dev->port_cnt--;
dev->last_port = dev->port_cnt;
id2 = 0x94;
}
id16 &= ~0xff;
id16 |= id2;
dev->chip_id = id16;
dev->cpu_port = dev->mib_port_cnt - 1;
dev->host_mask = BIT(dev->cpu_port);
return 0;
}
struct ksz_chip_data {
u16 chip_id;
const char *dev_name;
int num_vlans;
int num_alus;
int num_statics;
int cpu_ports;
int port_cnt;
};
static const struct ksz_chip_data ksz8795_switch_chips[] = {
{
.chip_id = 0x8795,
.dev_name = "KSZ8795",
.num_vlans = 4096,
.num_alus = 0,
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 4, /* total physical port count */
},
{
.chip_id = 0x8794,
.dev_name = "KSZ8794",
.num_vlans = 4096,
.num_alus = 0,
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 3, /* total physical port count */
},
{
.chip_id = 0x8765,
.dev_name = "KSZ8765",
.num_vlans = 4096,
.num_alus = 0,
.num_statics = 8,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 4, /* total physical port count */
},
};
static int ksz8795_switch_init(struct ksz_device *dev)
{
int i;
dev->ds->ops = &ksz8795_switch_ops;
for (i = 0; i < ARRAY_SIZE(ksz8795_switch_chips); i++) {
const struct ksz_chip_data *chip = &ksz8795_switch_chips[i];
if (dev->chip_id == chip->chip_id) {
dev->name = chip->dev_name;
dev->num_vlans = chip->num_vlans;
dev->num_alus = chip->num_alus;
dev->num_statics = chip->num_statics;
dev->port_cnt = chip->port_cnt;
dev->cpu_ports = chip->cpu_ports;
break;
}
}
/* no switch found */
if (!dev->cpu_ports)
return -ENODEV;
dev->port_mask = BIT(dev->port_cnt) - 1;
dev->port_mask |= dev->host_mask;
dev->reg_mib_cnt = SWITCH_COUNTER_NUM;
dev->mib_cnt = TOTAL_SWITCH_COUNTER_NUM;
i = dev->mib_port_cnt;
dev->ports = devm_kzalloc(dev->dev, sizeof(struct ksz_port) * i,
GFP_KERNEL);
if (!dev->ports)
return -ENOMEM;
for (i = 0; i < dev->mib_port_cnt; i++) {
mutex_init(&dev->ports[i].mib.cnt_mutex);
dev->ports[i].mib.counters =
devm_kzalloc(dev->dev,
sizeof(u64) *
(TOTAL_SWITCH_COUNTER_NUM + 1),
GFP_KERNEL);
if (!dev->ports[i].mib.counters)
return -ENOMEM;
}
/* set the real number of ports */
dev->ds->num_ports = dev->port_cnt;
return 0;
}
static void ksz8795_switch_exit(struct ksz_device *dev)
{
ksz8795_reset_switch(dev);
}
static const struct ksz_dev_ops ksz8795_dev_ops = {
.get_port_addr = ksz8795_get_port_addr,
.cfg_port_member = ksz8795_cfg_port_member,
.flush_dyn_mac_table = ksz8795_flush_dyn_mac_table,
.port_setup = ksz8795_port_setup,
.r_phy = ksz8795_r_phy,
.w_phy = ksz8795_w_phy,
.r_dyn_mac_table = ksz8795_r_dyn_mac_table,
.r_sta_mac_table = ksz8795_r_sta_mac_table,
.w_sta_mac_table = ksz8795_w_sta_mac_table,
.r_mib_cnt = ksz8795_r_mib_cnt,
.r_mib_pkt = ksz8795_r_mib_pkt,
.freeze_mib = ksz8795_freeze_mib,
.port_init_cnt = ksz8795_port_init_cnt,
.shutdown = ksz8795_reset_switch,
.detect = ksz8795_switch_detect,
.init = ksz8795_switch_init,
.exit = ksz8795_switch_exit,
};
int ksz8795_switch_register(struct ksz_device *dev)
{
return ksz_switch_register(dev, &ksz8795_dev_ops);
}
EXPORT_SYMBOL(ksz8795_switch_register);
MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
MODULE_DESCRIPTION("Microchip KSZ8795 Series Switch DSA Driver");
MODULE_LICENSE("GPL");
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