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335 lines
7.5 KiB
335 lines
7.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips |
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* Copyright (c) 2008-2009 Marvell Semiconductor |
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*/ |
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#include <linux/delay.h> |
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#include <linux/etherdevice.h> |
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#include <linux/jiffies.h> |
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/phy.h> |
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#include <net/dsa.h> |
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#include "mv88e6060.h" |
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static int reg_read(struct mv88e6060_priv *priv, int addr, int reg) |
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{ |
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return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg); |
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} |
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static int reg_write(struct mv88e6060_priv *priv, int addr, int reg, u16 val) |
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{ |
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return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val); |
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} |
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static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr) |
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{ |
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int ret; |
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ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID); |
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if (ret >= 0) { |
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if (ret == PORT_SWITCH_ID_6060) |
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return "Marvell 88E6060 (A0)"; |
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if (ret == PORT_SWITCH_ID_6060_R1 || |
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ret == PORT_SWITCH_ID_6060_R2) |
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return "Marvell 88E6060 (B0)"; |
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if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060) |
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return "Marvell 88E6060"; |
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} |
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return NULL; |
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} |
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static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds, |
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int port, |
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enum dsa_tag_protocol m) |
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{ |
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return DSA_TAG_PROTO_TRAILER; |
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} |
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static int mv88e6060_switch_reset(struct mv88e6060_priv *priv) |
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{ |
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int i; |
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int ret; |
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unsigned long timeout; |
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/* Set all ports to the disabled state. */ |
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for (i = 0; i < MV88E6060_PORTS; i++) { |
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ret = reg_read(priv, REG_PORT(i), PORT_CONTROL); |
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if (ret < 0) |
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return ret; |
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ret = reg_write(priv, REG_PORT(i), PORT_CONTROL, |
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ret & ~PORT_CONTROL_STATE_MASK); |
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if (ret) |
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return ret; |
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} |
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/* Wait for transmit queues to drain. */ |
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usleep_range(2000, 4000); |
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/* Reset the switch. */ |
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ret = reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL, |
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GLOBAL_ATU_CONTROL_SWRESET | |
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GLOBAL_ATU_CONTROL_LEARNDIS); |
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if (ret) |
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return ret; |
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/* Wait up to one second for reset to complete. */ |
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timeout = jiffies + 1 * HZ; |
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while (time_before(jiffies, timeout)) { |
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ret = reg_read(priv, REG_GLOBAL, GLOBAL_STATUS); |
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if (ret < 0) |
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return ret; |
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if (ret & GLOBAL_STATUS_INIT_READY) |
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break; |
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usleep_range(1000, 2000); |
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} |
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if (time_after(jiffies, timeout)) |
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return -ETIMEDOUT; |
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return 0; |
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} |
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static int mv88e6060_setup_global(struct mv88e6060_priv *priv) |
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{ |
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int ret; |
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/* Disable discarding of frames with excessive collisions, |
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* set the maximum frame size to 1536 bytes, and mask all |
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* interrupt sources. |
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*/ |
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ret = reg_write(priv, REG_GLOBAL, GLOBAL_CONTROL, |
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GLOBAL_CONTROL_MAX_FRAME_1536); |
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if (ret) |
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return ret; |
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/* Disable automatic address learning. |
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*/ |
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return reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL, |
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GLOBAL_ATU_CONTROL_LEARNDIS); |
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} |
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static int mv88e6060_setup_port(struct mv88e6060_priv *priv, int p) |
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{ |
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int addr = REG_PORT(p); |
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int ret; |
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/* Do not force flow control, disable Ingress and Egress |
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* Header tagging, disable VLAN tunneling, and set the port |
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* state to Forwarding. Additionally, if this is the CPU |
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* port, enable Ingress and Egress Trailer tagging mode. |
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*/ |
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ret = reg_write(priv, addr, PORT_CONTROL, |
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dsa_is_cpu_port(priv->ds, p) ? |
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PORT_CONTROL_TRAILER | |
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PORT_CONTROL_INGRESS_MODE | |
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PORT_CONTROL_STATE_FORWARDING : |
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PORT_CONTROL_STATE_FORWARDING); |
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if (ret) |
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return ret; |
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/* Port based VLAN map: give each port its own address |
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* database, allow the CPU port to talk to each of the 'real' |
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* ports, and allow each of the 'real' ports to only talk to |
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* the CPU port. |
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*/ |
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ret = reg_write(priv, addr, PORT_VLAN_MAP, |
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((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) | |
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(dsa_is_cpu_port(priv->ds, p) ? |
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dsa_user_ports(priv->ds) : |
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BIT(dsa_to_port(priv->ds, p)->cpu_dp->index))); |
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if (ret) |
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return ret; |
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/* Port Association Vector: when learning source addresses |
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* of packets, add the address to the address database using |
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* a port bitmap that has only the bit for this port set and |
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* the other bits clear. |
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*/ |
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return reg_write(priv, addr, PORT_ASSOC_VECTOR, BIT(p)); |
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} |
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static int mv88e6060_setup_addr(struct mv88e6060_priv *priv) |
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{ |
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u8 addr[ETH_ALEN]; |
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int ret; |
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u16 val; |
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eth_random_addr(addr); |
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val = addr[0] << 8 | addr[1]; |
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/* The multicast bit is always transmitted as a zero, so the switch uses |
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* bit 8 for "DiffAddr", where 0 means all ports transmit the same SA. |
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*/ |
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val &= 0xfeff; |
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ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_01, val); |
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if (ret) |
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return ret; |
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ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_23, |
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(addr[2] << 8) | addr[3]); |
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if (ret) |
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return ret; |
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return reg_write(priv, REG_GLOBAL, GLOBAL_MAC_45, |
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(addr[4] << 8) | addr[5]); |
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} |
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static int mv88e6060_setup(struct dsa_switch *ds) |
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{ |
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struct mv88e6060_priv *priv = ds->priv; |
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int ret; |
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int i; |
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priv->ds = ds; |
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ret = mv88e6060_switch_reset(priv); |
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if (ret < 0) |
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return ret; |
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/* @@@ initialise atu */ |
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ret = mv88e6060_setup_global(priv); |
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if (ret < 0) |
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return ret; |
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ret = mv88e6060_setup_addr(priv); |
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if (ret < 0) |
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return ret; |
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for (i = 0; i < MV88E6060_PORTS; i++) { |
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ret = mv88e6060_setup_port(priv, i); |
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if (ret < 0) |
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return ret; |
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} |
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return 0; |
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} |
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static int mv88e6060_port_to_phy_addr(int port) |
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{ |
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if (port >= 0 && port < MV88E6060_PORTS) |
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return port; |
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return -1; |
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} |
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static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum) |
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{ |
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struct mv88e6060_priv *priv = ds->priv; |
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int addr; |
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addr = mv88e6060_port_to_phy_addr(port); |
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if (addr == -1) |
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return 0xffff; |
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return reg_read(priv, addr, regnum); |
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} |
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static int |
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mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) |
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{ |
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struct mv88e6060_priv *priv = ds->priv; |
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int addr; |
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addr = mv88e6060_port_to_phy_addr(port); |
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if (addr == -1) |
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return 0xffff; |
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return reg_write(priv, addr, regnum, val); |
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} |
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static const struct dsa_switch_ops mv88e6060_switch_ops = { |
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.get_tag_protocol = mv88e6060_get_tag_protocol, |
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.setup = mv88e6060_setup, |
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.phy_read = mv88e6060_phy_read, |
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.phy_write = mv88e6060_phy_write, |
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}; |
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static int mv88e6060_probe(struct mdio_device *mdiodev) |
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{ |
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struct device *dev = &mdiodev->dev; |
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struct mv88e6060_priv *priv; |
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struct dsa_switch *ds; |
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const char *name; |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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priv->bus = mdiodev->bus; |
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priv->sw_addr = mdiodev->addr; |
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name = mv88e6060_get_name(priv->bus, priv->sw_addr); |
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if (!name) |
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return -ENODEV; |
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dev_info(dev, "switch %s detected\n", name); |
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ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL); |
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if (!ds) |
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return -ENOMEM; |
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ds->dev = dev; |
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ds->num_ports = MV88E6060_PORTS; |
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ds->priv = priv; |
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ds->dev = dev; |
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ds->ops = &mv88e6060_switch_ops; |
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dev_set_drvdata(dev, ds); |
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return dsa_register_switch(ds); |
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} |
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static void mv88e6060_remove(struct mdio_device *mdiodev) |
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{ |
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struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); |
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if (!ds) |
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return; |
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dsa_unregister_switch(ds); |
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dev_set_drvdata(&mdiodev->dev, NULL); |
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} |
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static void mv88e6060_shutdown(struct mdio_device *mdiodev) |
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{ |
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struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); |
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if (!ds) |
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return; |
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dsa_switch_shutdown(ds); |
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dev_set_drvdata(&mdiodev->dev, NULL); |
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} |
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static const struct of_device_id mv88e6060_of_match[] = { |
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{ |
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.compatible = "marvell,mv88e6060", |
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}, |
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{ /* sentinel */ }, |
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}; |
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static struct mdio_driver mv88e6060_driver = { |
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.probe = mv88e6060_probe, |
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.remove = mv88e6060_remove, |
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.shutdown = mv88e6060_shutdown, |
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.mdiodrv.driver = { |
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.name = "mv88e6060", |
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.of_match_table = mv88e6060_of_match, |
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}, |
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}; |
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mdio_module_driver(mv88e6060_driver); |
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MODULE_AUTHOR("Lennert Buytenhek <[email protected]>"); |
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MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:mv88e6060");
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