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/*
* net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support
*
* Copyright (c) 2014 Guenter Roeck
*
* Derived from mv88e6123_61_65.c
* Copyright (c) 2008-2009 Marvell Semiconductor
*
* 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.
*/
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <net/dsa.h>
#include "mv88e6xxx.h"
static char *mv88e6352_probe(struct device *host_dev, int sw_addr)
{
struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
int ret;
if (bus == NULL)
return NULL;
ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), PORT_SWITCH_ID);
if (ret >= 0) {
if ((ret & 0xfff0) == PORT_SWITCH_ID_6172)
return "Marvell 88E6172";
if ((ret & 0xfff0) == PORT_SWITCH_ID_6176)
return "Marvell 88E6176";
if (ret == PORT_SWITCH_ID_6320_A1)
return "Marvell 88E6320 (A1)";
if (ret == PORT_SWITCH_ID_6320_A2)
return "Marvell 88e6320 (A2)";
if ((ret & 0xfff0) == PORT_SWITCH_ID_6320)
return "Marvell 88E6320";
if (ret == PORT_SWITCH_ID_6321_A1)
return "Marvell 88E6321 (A1)";
if (ret == PORT_SWITCH_ID_6321_A2)
return "Marvell 88e6321 (A2)";
if ((ret & 0xfff0) == PORT_SWITCH_ID_6321)
return "Marvell 88E6321";
if (ret == PORT_SWITCH_ID_6352_A0)
return "Marvell 88E6352 (A0)";
if (ret == PORT_SWITCH_ID_6352_A1)
return "Marvell 88E6352 (A1)";
if ((ret & 0xfff0) == PORT_SWITCH_ID_6352)
return "Marvell 88E6352";
}
return NULL;
}
static int mv88e6352_setup_global(struct dsa_switch *ds)
{
u32 upstream_port = dsa_upstream_port(ds);
int ret;
u32 reg;
ret = mv88e6xxx_setup_global(ds);
if (ret)
return ret;
/* Discard packets with excessive collisions,
* mask all interrupt sources, enable PPU (bit 14, undocumented).
*/
REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL,
GLOBAL_CONTROL_PPU_ENABLE | GLOBAL_CONTROL_DISCARD_EXCESS);
/* Configure the upstream port, and configure the upstream
* port as the port to which ingress and egress monitor frames
* are to be sent.
*/
reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT |
upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT |
upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg);
/* Disable remote management for now, and set the switch's
* DSA device number.
*/
REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f);
return 0;
}
static int mv88e6352_setup(struct dsa_switch *ds)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int ret;
ret = mv88e6xxx_setup_common(ds);
if (ret < 0)
return ret;
ps->num_ports = 7;
mutex_init(&ps->eeprom_mutex);
ret = mv88e6xxx_switch_reset(ds, true);
if (ret < 0)
return ret;
ret = mv88e6352_setup_global(ds);
if (ret < 0)
return ret;
return mv88e6xxx_setup_ports(ds);
}
static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int ret;
mutex_lock(&ps->eeprom_mutex);
ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
GLOBAL2_EEPROM_OP_READ |
(addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
if (ret < 0)
goto error;
ret = mv88e6xxx_eeprom_busy_wait(ds);
if (ret < 0)
goto error;
ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA);
error:
mutex_unlock(&ps->eeprom_mutex);
return ret;
}
static int mv88e6352_get_eeprom(struct dsa_switch *ds,
struct ethtool_eeprom *eeprom, u8 *data)
{
int offset;
int len;
int ret;
offset = eeprom->offset;
len = eeprom->len;
eeprom->len = 0;
eeprom->magic = 0xc3ec4951;
ret = mv88e6xxx_eeprom_load_wait(ds);
if (ret < 0)
return ret;
if (offset & 1) {
int word;
word = mv88e6352_read_eeprom_word(ds, offset >> 1);
if (word < 0)
return word;
*data++ = (word >> 8) & 0xff;
offset++;
len--;
eeprom->len++;
}
while (len >= 2) {
int word;
word = mv88e6352_read_eeprom_word(ds, offset >> 1);
if (word < 0)
return word;
*data++ = word & 0xff;
*data++ = (word >> 8) & 0xff;
offset += 2;
len -= 2;
eeprom->len += 2;
}
if (len) {
int word;
word = mv88e6352_read_eeprom_word(ds, offset >> 1);
if (word < 0)
return word;
*data++ = word & 0xff;
offset++;
len--;
eeprom->len++;
}
return 0;
}
static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds)
{
int ret;
ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP);
if (ret < 0)
return ret;
if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN))
return -EROFS;
return 0;
}
static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr,
u16 data)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int ret;
mutex_lock(&ps->eeprom_mutex);
ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data);
if (ret < 0)
goto error;
ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
GLOBAL2_EEPROM_OP_WRITE |
(addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
if (ret < 0)
goto error;
ret = mv88e6xxx_eeprom_busy_wait(ds);
error:
mutex_unlock(&ps->eeprom_mutex);
return ret;
}
static int mv88e6352_set_eeprom(struct dsa_switch *ds,
struct ethtool_eeprom *eeprom, u8 *data)
{
int offset;
int ret;
int len;
if (eeprom->magic != 0xc3ec4951)
return -EINVAL;
ret = mv88e6352_eeprom_is_readonly(ds);
if (ret)
return ret;
offset = eeprom->offset;
len = eeprom->len;
eeprom->len = 0;
ret = mv88e6xxx_eeprom_load_wait(ds);
if (ret < 0)
return ret;
if (offset & 1) {
int word;
word = mv88e6352_read_eeprom_word(ds, offset >> 1);
if (word < 0)
return word;
word = (*data++ << 8) | (word & 0xff);
ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
if (ret < 0)
return ret;
offset++;
len--;
eeprom->len++;
}
while (len >= 2) {
int word;
word = *data++;
word |= *data++ << 8;
ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
if (ret < 0)
return ret;
offset += 2;
len -= 2;
eeprom->len += 2;
}
if (len) {
int word;
word = mv88e6352_read_eeprom_word(ds, offset >> 1);
if (word < 0)
return word;
word = (word & 0xff00) | *data++;
ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
if (ret < 0)
return ret;
offset++;
len--;
eeprom->len++;
}
return 0;
}
struct dsa_switch_driver mv88e6352_switch_driver = {
.tag_protocol = DSA_TAG_PROTO_EDSA,
.priv_size = sizeof(struct mv88e6xxx_priv_state),
.probe = mv88e6352_probe,
.setup = mv88e6352_setup,
.set_addr = mv88e6xxx_set_addr_indirect,
.phy_read = mv88e6xxx_phy_read_indirect,
.phy_write = mv88e6xxx_phy_write_indirect,
.get_strings = mv88e6xxx_get_strings,
.get_ethtool_stats = mv88e6xxx_get_ethtool_stats,
.get_sset_count = mv88e6xxx_get_sset_count,
.adjust_link = mv88e6xxx_adjust_link,
.set_eee = mv88e6xxx_set_eee,
.get_eee = mv88e6xxx_get_eee,
#ifdef CONFIG_NET_DSA_HWMON
.get_temp = mv88e6xxx_get_temp,
.get_temp_limit = mv88e6xxx_get_temp_limit,
.set_temp_limit = mv88e6xxx_set_temp_limit,
.get_temp_alarm = mv88e6xxx_get_temp_alarm,
#endif
.get_eeprom = mv88e6352_get_eeprom,
.set_eeprom = mv88e6352_set_eeprom,
.get_regs_len = mv88e6xxx_get_regs_len,
.get_regs = mv88e6xxx_get_regs,
.port_join_bridge = mv88e6xxx_join_bridge,
.port_leave_bridge = mv88e6xxx_leave_bridge,
.port_stp_update = mv88e6xxx_port_stp_update,
.port_pvid_get = mv88e6xxx_port_pvid_get,
.port_pvid_set = mv88e6xxx_port_pvid_set,
.port_vlan_add = mv88e6xxx_port_vlan_add,
.port_vlan_del = mv88e6xxx_port_vlan_del,
.vlan_getnext = mv88e6xxx_vlan_getnext,
.port_fdb_prepare = mv88e6xxx_port_fdb_prepare,
.port_fdb_add = mv88e6xxx_port_fdb_add,
.port_fdb_del = mv88e6xxx_port_fdb_del,
.port_fdb_getnext = mv88e6xxx_port_fdb_getnext,
};
MODULE_ALIAS("platform:mv88e6172");
MODULE_ALIAS("platform:mv88e6176");
MODULE_ALIAS("platform:mv88e6320");
MODULE_ALIAS("platform:mv88e6321");
MODULE_ALIAS("platform:mv88e6352");
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