diff options
Diffstat (limited to 'target/linux/ar71xx/files/net/dsa/mv88e6063.c')
| -rw-r--r-- | target/linux/ar71xx/files/net/dsa/mv88e6063.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/net/dsa/mv88e6063.c b/target/linux/ar71xx/files/net/dsa/mv88e6063.c new file mode 100644 index 0000000000..5638a9fe94 --- /dev/null +++ b/target/linux/ar71xx/files/net/dsa/mv88e6063.c @@ -0,0 +1,294 @@ +/* + * 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/list.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include "dsa_priv.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) +{ + return mdiobus_read(ds->master_mii_bus, addr, reg); +} + +#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) +{ + return mdiobus_write(ds->master_mii_bus, addr, reg, val); +} + +#define REG_WRITE(addr, reg, val) \ + ({ \ + int __ret; \ + \ + __ret = reg_write(ds, addr, reg, val); \ + if (__ret < 0) \ + return __ret; \ + }) + +static char *mv88e6063_probe(struct mii_bus *bus, int sw_addr) +{ + int ret; + + 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) ? + ds->phys_port_mask : + (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); +} + +static void mv88e6063_poll_link(struct dsa_switch *ds) +{ + int i; + + for (i = 0; i < DSA_MAX_PORTS; i++) { + struct net_device *dev; + int uninitialized_var(port_status); + int link; + int speed; + int duplex; + int fc; + + dev = ds->ports[i]; + if (dev == NULL) + continue; + + link = 0; + if (dev->flags & IFF_UP) { + port_status = reg_read(ds, REG_PORT(i), 0x00); + if (port_status < 0) + continue; + + link = !!(port_status & 0x1000); + } + + if (!link) { + if (netif_carrier_ok(dev)) { + printk(KERN_INFO "%s: link down\n", dev->name); + netif_carrier_off(dev); + } + continue; + } + + speed = (port_status & 0x0100) ? 100 : 10; + duplex = (port_status & 0x0200) ? 1 : 0; + fc = ((port_status & 0xc000) == 0xc000) ? 1 : 0; + + if (!netif_carrier_ok(dev)) { + printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, " + "flow control %sabled\n", dev->name, + speed, duplex ? "full" : "half", + fc ? "en" : "dis"); + netif_carrier_on(dev); + } + } +} + +static struct dsa_switch_driver mv88e6063_switch_driver = { + .tag_protocol = htons(ETH_P_TRAILER), + .probe = mv88e6063_probe, + .setup = mv88e6063_setup, + .set_addr = mv88e6063_set_addr, + .phy_read = mv88e6063_phy_read, + .phy_write = mv88e6063_phy_write, + .poll_link = mv88e6063_poll_link, +}; + +static int __init mv88e6063_init(void) +{ + register_switch_driver(&mv88e6063_switch_driver); + return 0; +} +module_init(mv88e6063_init); + +static void __exit mv88e6063_cleanup(void) +{ + unregister_switch_driver(&mv88e6063_switch_driver); +} +module_exit(mv88e6063_cleanup); |