openwrtv3/target/linux/ar71xx/files/drivers/net/dsa/mv88e6063.c
Hauke Mehrtens 7bbf4117c6 ar71xx: Add kernel 4.9 support
This add support for kernel 4.9 to the ar71xx target.
It was compile tested with the generic, NAND and mikrotik subtarget.
Multiple members of the community tested it on their boards and did not
report any major problem so far.

Especially the NAND part received some changes to adapt to the new
kernel APIs. The serial driver hack used for the Arduino Yun was not
ported because the kernel changed there a lot.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2017-10-11 22:32:39 +02:00

289 lines
6.5 KiB
C

/*
* net/dsa/mv88e6063.c - Driver for Marvell 88e6063 switch chips
* Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
*
* This driver was base on: net/dsa/mv88e6060.c
* net/dsa/mv88e6063.c - Driver for Marvell 88e6060 switch chips
* 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/version.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <net/dsa.h>
#include <linux/version.h>
#define REG_BASE 0x10
#define REG_PHY(p) (REG_BASE + (p))
#define REG_PORT(p) (REG_BASE + 8 + (p))
#define REG_GLOBAL (REG_BASE + 0x0f)
#define NUM_PORTS 7
static int reg_read(struct dsa_switch *ds, int addr, int reg)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);
return mdiobus_read(bus, addr, reg);
#else
struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->dev);
return mdiobus_read(bus, addr, reg);
#endif
}
#define REG_READ(addr, reg) \
({ \
int __ret; \
\
__ret = reg_read(ds, addr, reg); \
if (__ret < 0) \
return __ret; \
__ret; \
})
static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);
return mdiobus_write(bus, addr, reg, val);
#else
struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->dev);
return mdiobus_write(bus, addr, reg, val);
#endif
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)
static enum dsa_tag_protocol mv88e6063_get_tag_protocol(struct dsa_switch *ds)
{
return DSA_TAG_PROTO_TRAILER;
}
#endif
#define REG_WRITE(addr, reg, val) \
({ \
int __ret; \
\
__ret = reg_write(ds, addr, reg, val); \
if (__ret < 0) \
return __ret; \
})
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
static char *mv88e6063_drv_probe(struct device *host_dev, int sw_addr)
#else
static const char *mv88e6063_drv_probe(struct device *dsa_dev,
struct device *host_dev, int sw_addr,
void **_priv)
#endif
{
struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
int ret;
if (!bus)
return NULL;
ret = mdiobus_read(bus, REG_PORT(0), 0x03);
if (ret >= 0) {
ret &= 0xfff0;
if (ret == 0x1530)
return "Marvell 88E6063";
}
return NULL;
}
static int mv88e6063_switch_reset(struct dsa_switch *ds)
{
int i;
int ret;
/*
* Set all ports to the disabled state.
*/
for (i = 0; i < NUM_PORTS; i++) {
ret = REG_READ(REG_PORT(i), 0x04);
REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc);
}
/*
* Wait for transmit queues to drain.
*/
msleep(2);
/*
* Reset the switch.
*/
REG_WRITE(REG_GLOBAL, 0x0a, 0xa130);
/*
* Wait up to one second for reset to complete.
*/
for (i = 0; i < 1000; i++) {
ret = REG_READ(REG_GLOBAL, 0x00);
if ((ret & 0x8000) == 0x0000)
break;
msleep(1);
}
if (i == 1000)
return -ETIMEDOUT;
return 0;
}
static int mv88e6063_setup_global(struct dsa_switch *ds)
{
/*
* Disable discarding of frames with excessive collisions,
* set the maximum frame size to 1536 bytes, and mask all
* interrupt sources.
*/
REG_WRITE(REG_GLOBAL, 0x04, 0x0800);
/*
* Enable automatic address learning, set the address
* database size to 1024 entries, and set the default aging
* time to 5 minutes.
*/
REG_WRITE(REG_GLOBAL, 0x0a, 0x2130);
return 0;
}
static int mv88e6063_setup_port(struct dsa_switch *ds, int p)
{
int addr = REG_PORT(p);
/*
* Do not force flow control, disable Ingress and Egress
* Header tagging, disable VLAN tunneling, and set the port
* state to Forwarding. Additionally, if this is the CPU
* port, enable Ingress and Egress Trailer tagging mode.
*/
REG_WRITE(addr, 0x04, dsa_is_cpu_port(ds, p) ? 0x4103 : 0x0003);
/*
* Port based VLAN map: give each port its own address
* database, allow the CPU port to talk to each of the 'real'
* ports, and allow each of the 'real' ports to only talk to
* the CPU port.
*/
REG_WRITE(addr, 0x06,
((p & 0xf) << 12) |
(dsa_is_cpu_port(ds, p) ?
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
ds->phys_port_mask :
#else
ds->enabled_port_mask :
#endif
(1 << ds->dst->cpu_port)));
/*
* Port Association Vector: when learning source addresses
* of packets, add the address to the address database using
* a port bitmap that has only the bit for this port set and
* the other bits clear.
*/
REG_WRITE(addr, 0x0b, 1 << p);
return 0;
}
static int mv88e6063_setup(struct dsa_switch *ds)
{
int i;
int ret;
ret = mv88e6063_switch_reset(ds);
if (ret < 0)
return ret;
/* @@@ initialise atu */
ret = mv88e6063_setup_global(ds);
if (ret < 0)
return ret;
for (i = 0; i < NUM_PORTS; i++) {
ret = mv88e6063_setup_port(ds, i);
if (ret < 0)
return ret;
}
return 0;
}
static int mv88e6063_set_addr(struct dsa_switch *ds, u8 *addr)
{
REG_WRITE(REG_GLOBAL, 0x01, (addr[0] << 8) | addr[1]);
REG_WRITE(REG_GLOBAL, 0x02, (addr[2] << 8) | addr[3]);
REG_WRITE(REG_GLOBAL, 0x03, (addr[4] << 8) | addr[5]);
return 0;
}
static int mv88e6063_port_to_phy_addr(int port)
{
if (port >= 0 && port <= NUM_PORTS)
return REG_PHY(port);
return -1;
}
static int mv88e6063_phy_read(struct dsa_switch *ds, int port, int regnum)
{
int addr;
addr = mv88e6063_port_to_phy_addr(port);
if (addr == -1)
return 0xffff;
return reg_read(ds, addr, regnum);
}
static int
mv88e6063_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
{
int addr;
addr = mv88e6063_port_to_phy_addr(port);
if (addr == -1)
return 0xffff;
return reg_write(ds, addr, regnum, val);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,9,0)
static struct dsa_switch_driver mv88e6063_switch_ops = {
#else
static struct dsa_switch_ops mv88e6063_switch_ops = {
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,8,0)
.tag_protocol = htons(ETH_P_TRAILER),
#else
.get_tag_protocol = mv88e6063_get_tag_protocol,
#endif
.probe = mv88e6063_drv_probe,
.setup = mv88e6063_setup,
.set_addr = mv88e6063_set_addr,
.phy_read = mv88e6063_phy_read,
.phy_write = mv88e6063_phy_write,
};
static int __init mv88e6063_init(void)
{
register_switch_driver(&mv88e6063_switch_ops);
return 0;
}
module_init(mv88e6063_init);
static void __exit mv88e6063_cleanup(void)
{
unregister_switch_driver(&mv88e6063_switch_ops);
}
module_exit(mv88e6063_cleanup);