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openwrt/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
Felix Fietkau 4e12c9d210 fix a crash in ip175c attribute enumeration 
SVN-Revision: 15506
2009-04-30 13:57:22 +00:00

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/*
* swconfig-ip175c.c: Swconfig configuration for IC+ IP175C switch
*
* Copyright (C) 2008 Patrick Horn <patrick.horn@gmail.com>
* Copyright (C) 2008 Martin Mares <mj@ucw.cz>
* Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/delay.h>
#include <linux/switch.h>
#define MAX_VLANS 16
#define MAX_PORTS 9
typedef struct ip175c_reg {
u16 p; // phy
u16 m; // mii
} reg;
typedef char bitnum;
#define NOTSUPPORTED {-1,-1}
#define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
/*********** CONSTANTS ***********/
struct register_mappings {
char *NAME;
u16 MODEL_NO; // compare to bits 4-9 of MII register 0,3.
bitnum NUM_PORTS;
bitnum CPU_PORT;
/* The default VLAN for each port.
Default: 0x0001 for Ports 0,1,2,3
0x0002 for Ports 4,5 */
reg VLAN_DEFAULT_TAG_REG[MAX_PORTS];
/* These ports are tagged.
Default: 0x00 */
reg ADD_TAG_REG;
reg REMOVE_TAG_REG;
bitnum ADD_TAG_BIT[MAX_PORTS];
/* These ports are untagged.
Default: 0x00 (i.e. do not alter any VLAN tags...)
Maybe set to 0 if user disables VLANs. */
bitnum REMOVE_TAG_BIT[MAX_PORTS];
/* Port M and Port N are on the same VLAN.
Default: All ports on all VLANs. */
// Use register {29, 19+N/2}
reg VLAN_LOOKUP_REG;
// Port 5 uses register {30, 18} but same as odd bits.
reg VLAN_LOOKUP_REG_5; // in a different register on IP175C.
bitnum VLAN_LOOKUP_EVEN_BIT[MAX_PORTS];
bitnum VLAN_LOOKUP_ODD_BIT[MAX_PORTS];
/* This VLAN corresponds to which ports.
Default: 0x2f,0x30,0x3f,0x3f... */
reg TAG_VLAN_MASK_REG;
bitnum TAG_VLAN_MASK_EVEN_BIT[MAX_PORTS];
bitnum TAG_VLAN_MASK_ODD_BIT[MAX_PORTS];
int RESET_VAL;
reg RESET_REG;
reg MODE_REG;
int MODE_VAL;
/* General flags */
reg ROUTER_CONTROL_REG;
reg VLAN_CONTROL_REG;
bitnum TAG_VLAN_BIT;
bitnum ROUTER_EN_BIT;
bitnum NUMLAN_GROUPS_MAX;
bitnum NUMLAN_GROUPS_BIT;
reg MII_REGISTER_EN;
bitnum MII_REGISTER_EN_BIT;
// set to 1 for 178C, 0 for 175C.
bitnum SIMPLE_VLAN_REGISTERS; // 175C has two vlans per register but 178C has only one.
};
static const struct register_mappings IP178C = {
.NAME = "IP178C",
.MODEL_NO = 0x18,
.VLAN_DEFAULT_TAG_REG = {
{30,3},{30,4},{30,5},{30,6},{30,7},{30,8},
{30,9},{30,10},{30,11},
},
.ADD_TAG_REG = {30,12},
.ADD_TAG_BIT = {0,1,2,3,4,5,6,7,8},
.REMOVE_TAG_REG = {30,13},
.REMOVE_TAG_BIT = {4,5,6,7,8,9,10,11,12},
.SIMPLE_VLAN_REGISTERS = 1,
.VLAN_LOOKUP_REG = {31,0},// +N
.VLAN_LOOKUP_REG_5 = NOTSUPPORTED, // not used with SIMPLE_VLAN_REGISTERS
.VLAN_LOOKUP_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
.VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,5,6,7,8},
.TAG_VLAN_MASK_REG = {30,14}, // +N
.TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
.TAG_VLAN_MASK_ODD_BIT = {0,1,2,3,4,5,6,7,8},
.RESET_VAL = 0x55AA,
.RESET_REG = {30,0},
.MODE_VAL = 0,
.MODE_REG = NOTSUPPORTED,
.ROUTER_CONTROL_REG = {30,30},
.ROUTER_EN_BIT = 11,
.NUMLAN_GROUPS_MAX = 8,
.NUMLAN_GROUPS_BIT = 8, // {0-2}
.VLAN_CONTROL_REG = {30,13},
.TAG_VLAN_BIT = 3,
.CPU_PORT = 8,
.NUM_PORTS = 9,
.MII_REGISTER_EN = NOTSUPPORTED,
};
static const struct register_mappings IP175C = {
.NAME = "IP175C",
.MODEL_NO = 0x18,
.VLAN_DEFAULT_TAG_REG = {
{29,24},{29,25},{29,26},{29,27},{29,28},{29,30},
NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
},
.ADD_TAG_REG = {29,23},
.REMOVE_TAG_REG = {29,23},
.ADD_TAG_BIT = {11,12,13,14,15,1,-1,-1,-1},
.REMOVE_TAG_BIT = {6,7,8,9,10,0,-1,-1,-1},
.SIMPLE_VLAN_REGISTERS = 0,
.VLAN_LOOKUP_REG = {29,19},// +N/2
.VLAN_LOOKUP_REG_5 = {30,18},
.VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,15,-1,-1,-1},
.VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,7,-1,-1,-1},
.TAG_VLAN_MASK_REG = {30,1}, // +N/2
.TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,-1,-1,-1},
.TAG_VLAN_MASK_ODD_BIT = {8,9,10,11,12,13,-1,-1,-1},
.RESET_VAL = 0x175C,
.RESET_REG = {30,0},
.MODE_VAL = 0x175C,
.MODE_REG = {29,31},
.ROUTER_CONTROL_REG = {30,9},
.ROUTER_EN_BIT = 3,
.NUMLAN_GROUPS_MAX = 8,
.NUMLAN_GROUPS_BIT = 0, // {0-2}
.VLAN_CONTROL_REG = {30,9},
.TAG_VLAN_BIT = 7,
.NUM_PORTS = 6,
.CPU_PORT = 5,
.MII_REGISTER_EN = NOTSUPPORTED,
};
static const struct register_mappings IP175A = {
.NAME = "IP175A",
.MODEL_NO = 0x05,
.VLAN_DEFAULT_TAG_REG = {
{0,24},{0,25},{0,26},{0,27},{0,28},NOTSUPPORTED,
NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
},
.ADD_TAG_REG = {0,23},
.REMOVE_TAG_REG = {0,23},
.ADD_TAG_BIT = {11,12,13,14,15,1,-1,-1,-1},
.REMOVE_TAG_BIT = {6,7,8,9,10,0,-1,-1,-1},
.SIMPLE_VLAN_REGISTERS = 1,
// Only programmable via. EEPROM
.VLAN_LOOKUP_REG = NOTSUPPORTED,// +N/2
.VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
.VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,15,-1,-1,-1},
.VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,7,-1,-1,-1},
.TAG_VLAN_MASK_REG = NOTSUPPORTED, // +N/2
.TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,-1,-1,-1},
.TAG_VLAN_MASK_ODD_BIT = {8,9,10,11,12,13,-1,-1,-1},
.RESET_VAL = -1,
.RESET_REG = NOTSUPPORTED,
.MODE_VAL = 0,
.MODE_REG = NOTSUPPORTED,
.ROUTER_CONTROL_REG = NOTSUPPORTED,
.VLAN_CONTROL_REG = NOTSUPPORTED,
.TAG_VLAN_BIT = -1,
.ROUTER_EN_BIT = -1,
.NUMLAN_GROUPS_MAX = -1,
.NUMLAN_GROUPS_BIT = -1, // {0-2}
.NUM_PORTS = 6,
.CPU_PORT = 5,
.MII_REGISTER_EN = {0, 12},
.MII_REGISTER_EN_BIT = 7,
};
struct ip175c_state {
struct switch_dev dev;
struct mii_bus *mii_bus;
bool registered;
int router_mode; // ROUTER_EN
int vlan_enabled; // TAG_VLAN_EN
struct port_state {
u16 pvid;
unsigned int shareports;
} ports[MAX_PORTS];
unsigned int add_tag;
unsigned int remove_tag;
int num_vlans;
unsigned int vlan_ports[MAX_VLANS];
const struct register_mappings *regs;
reg proc_mii; /*!< phy/reg for the low level register access via /proc */
char buf[80];
};
static int ip_phy_read(struct mii_bus *bus, int port, int reg)
{
int val;
mutex_lock(&bus->mdio_lock);
val = bus->read(bus, port, reg);
mutex_unlock(&bus->mdio_lock);
return val;
}
static int ip_phy_write(struct mii_bus *bus, int port, int reg, u16 val)
{
int err;
mutex_lock(&bus->mdio_lock);
err = bus->write(bus, port, reg, val);
mutex_unlock(&bus->mdio_lock);
return err;
}
static int getPhy (struct ip175c_state *state, reg mii)
{
struct mii_bus *bus = state->mii_bus;
int val;
if (!REG_SUPP(mii))
return -EFAULT;
val = ip_phy_read(bus, mii.p, mii.m);
if (val < 0)
pr_warning("IP175C: Unable to get MII register %d,%d: error %d\n", mii.p,mii.m,-val);
return val;
}
static int setPhy (struct ip175c_state *state, reg mii, u16 value)
{
struct mii_bus *bus = state->mii_bus;
int err;
if (!REG_SUPP(mii))
return -EFAULT;
err = ip_phy_write(bus, mii.p, mii.m, value);
if (err < 0) {
pr_warning("IP175C: Unable to set MII register %d,%d to %d: error %d\n", mii.p,mii.m,value,-err);
return err;
}
mdelay(2);
getPhy(state, mii);
return 0;
}
/**
* These two macros are to simplify the mapping of logical bits to the bits in hardware.
* NOTE: these macros will return if there is an error!
*/
#define GET_PORT_BITS(state, bits, addr, bit_lookup) \
do { \
int i, val = getPhy((state), (addr)); \
if (val < 0) \
return val; \
(bits) = 0; \
for (i = 0; i < MAX_PORTS; i++) { \
if ((bit_lookup)[i] == -1) continue; \
if (val & (1<<(bit_lookup)[i])) \
(bits) |= (1<<i); \
} \
} while (0)
#define SET_PORT_BITS(state, bits, addr, bit_lookup) \
do { \
int i, val = getPhy((state), (addr)); \
if (val < 0) \
return val; \
for (i = 0; i < MAX_PORTS; i++) { \
unsigned int newmask = ((bits)&(1<<i)); \
if ((bit_lookup)[i] == -1) continue; \
val &= ~(1<<(bit_lookup)[i]); \
val |= ((newmask>>i)<<(bit_lookup)[i]); \
} \
val = setPhy((state), (addr), val); \
if (val < 0) \
return val; \
} while (0)
static int get_model(struct ip175c_state *state)
{
reg oui_id_reg = {0, 2};
int oui_id;
reg model_no_reg = {0, 3};
int model_no, model_no_orig;
// 175 and 178 have the same oui ID.
reg oui_id_reg_178c = {5, 2}; // returns error on IP175C.
int is_178c = 0;
oui_id = getPhy(state, oui_id_reg);
if (oui_id != 0x0243) {
// non
return -ENODEV; // Not a IC+ chip.
}
oui_id = getPhy(state, oui_id_reg_178c);
if (oui_id == 0x0243) {
is_178c = 1;
}
model_no_orig = getPhy(state, model_no_reg);
if (model_no_orig < 0) {
return -ENODEV;
}
model_no = model_no_orig >> 4; // shift out revision number.
model_no &= 0x3f; // only take the model number (low 6 bits).
if (model_no == IP175A.MODEL_NO) {
state->regs = &IP175A;
} else if (model_no == IP175C.MODEL_NO) {
if (is_178c) {
state->regs = &IP178C;
} else {
state->regs = &IP175C;
}
} else {
printk(KERN_WARNING "ip175c: Found an unknown IC+ switch with model number %02Xh.\n", model_no_orig);
return -EPERM;
}
return 0;
}
/** Get only the vlan and router flags on the router **/
static int get_flags(struct ip175c_state *state)
{
int val;
state->router_mode = 0;
state->vlan_enabled = -1; // hack
state->num_vlans = 0;
if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
return 0; // not an error if it doesn't support enable vlan.
}
val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
if (val < 0) {
return val;
}
if (state->regs->ROUTER_EN_BIT >= 0)
state->router_mode = ((val>>state->regs->ROUTER_EN_BIT) & 1);
if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
state->num_vlans = (val >> state->regs->NUMLAN_GROUPS_BIT);
state->num_vlans &= (state->regs->NUMLAN_GROUPS_MAX-1);
state->num_vlans+=1; // does not include WAN.
}
val = getPhy(state, state->regs->VLAN_CONTROL_REG);
if (val < 0) {
return 0;
}
if (state->regs->TAG_VLAN_BIT >= 0)
state->vlan_enabled = ((val>>state->regs->TAG_VLAN_BIT) & 1);
return 0;
}
/** Get all state variables for VLAN mappings and port-based tagging. **/
static int get_state(struct ip175c_state *state)
{
int i, j;
int ret;
ret = get_flags(state);
if (ret < 0) {
return ret;
}
GET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
GET_PORT_BITS(state, state->add_tag,
state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
if (state->vlan_enabled == -1) {
// not sure how to get this...
state->vlan_enabled = (!state->remove_tag && !state->add_tag);
}
if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
for (j=0; j<MAX_PORTS; j++) {
state->ports[j].shareports = 0; // initialize them in case.
}
for (j=0; j<state->regs->NUM_PORTS; j++) {
reg addr;
const bitnum *bit_lookup = (j%2==0)?
state->regs->VLAN_LOOKUP_EVEN_BIT:
state->regs->VLAN_LOOKUP_ODD_BIT;
addr = state->regs->VLAN_LOOKUP_REG;
if (state->regs->SIMPLE_VLAN_REGISTERS) {
addr.m += j;
} else {
switch (j) {
case 0:
case 1:
break;
case 2:
case 3:
addr.m+=1;
break;
case 4:
addr.m+=2;
break;
case 5:
addr = state->regs->VLAN_LOOKUP_REG_5;
break;
}
}
if (REG_SUPP(addr)) {
GET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
}
}
} else {
for (j=0; j<MAX_PORTS; j++) {
state->ports[j].shareports = 0xff;
}
}
for (i=0; i<MAX_PORTS; i++) {
if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
int val = getPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i]);
if (val < 0) {
return val;
}
state->ports[i].pvid = val;
} else {
state->ports[i].pvid = 0;
}
}
if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
for (j=0; j<MAX_VLANS; j++) {
reg addr = state->regs->TAG_VLAN_MASK_REG;
const bitnum *bit_lookup = (j%2==0)?
state->regs->TAG_VLAN_MASK_EVEN_BIT:
state->regs->TAG_VLAN_MASK_ODD_BIT;
if (state->regs->SIMPLE_VLAN_REGISTERS) {
addr.m += j;
} else {
addr.m += j/2;
}
GET_PORT_BITS(state, state->vlan_ports[j], addr, bit_lookup);
}
} else {
for (j=0; j<MAX_VLANS; j++) {
state->vlan_ports[j] = 0;
for (i=0; i<state->regs->NUM_PORTS; i++) {
if ((state->ports[i].pvid == j) ||
(state->ports[i].pvid == 0)) {
state->vlan_ports[j] |= (1<<i);
}
}
}
}
return 0;
}
/** Only update vlan and router flags in the switch **/
static int update_flags(struct ip175c_state *state)
{
int val;
if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
return 0;
}
val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
if (val < 0) {
return val;
}
if (state->regs->ROUTER_EN_BIT >= 0) {
if (state->router_mode) {
val |= (1<<state->regs->ROUTER_EN_BIT);
} else {
val &= (~(1<<state->regs->ROUTER_EN_BIT));
}
}
if (state->regs->TAG_VLAN_BIT >= 0) {
if (state->vlan_enabled) {
val |= (1<<state->regs->TAG_VLAN_BIT);
} else {
val &= (~(1<<state->regs->TAG_VLAN_BIT));
}
}
if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
val &= (~((state->regs->NUMLAN_GROUPS_MAX-1)<<state->regs->NUMLAN_GROUPS_BIT));
if (state->num_vlans > state->regs->NUMLAN_GROUPS_MAX) {
val |= state->regs->NUMLAN_GROUPS_MAX << state->regs->NUMLAN_GROUPS_BIT;
} else if (state->num_vlans >= 1) {
val |= (state->num_vlans-1) << state->regs->NUMLAN_GROUPS_BIT;
}
}
return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
}
/** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
static int update_state(struct ip175c_state *state)
{
int j;
int i;
SET_PORT_BITS(state, state->add_tag,
state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
SET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
for (j=0; j<state->regs->NUM_PORTS; j++) {
reg addr;
const bitnum *bit_lookup = (j%2==0)?
state->regs->VLAN_LOOKUP_EVEN_BIT:
state->regs->VLAN_LOOKUP_ODD_BIT;
// duplicate code -- sorry
addr = state->regs->VLAN_LOOKUP_REG;
if (state->regs->SIMPLE_VLAN_REGISTERS) {
addr.m += j;
} else {
switch (j) {
case 0:
case 1:
break;
case 2:
case 3:
addr.m+=1;
break;
case 4:
addr.m+=2;
break;
case 5:
addr = state->regs->VLAN_LOOKUP_REG_5;
break;
default:
addr.m = -1; // shouldn't get here, but...
break;
}
}
//printf("shareports for %d is %02X\n",j,state->ports[j].shareports);
if (REG_SUPP(addr)) {
SET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
}
}
}
if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
for (j=0; j<MAX_VLANS; j++) {
reg addr = state->regs->TAG_VLAN_MASK_REG;
const bitnum *bit_lookup = (j%2==0)?
state->regs->TAG_VLAN_MASK_EVEN_BIT:
state->regs->TAG_VLAN_MASK_ODD_BIT;
unsigned int vlan_mask;
if (state->regs->SIMPLE_VLAN_REGISTERS) {
addr.m += j;
} else {
addr.m += j/2;
}
vlan_mask = state->vlan_ports[j];
SET_PORT_BITS(state, vlan_mask, addr, bit_lookup);
}
}
for (i=0; i<MAX_PORTS; i++) {
if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
int err = setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i],
state->ports[i].pvid);
if (err < 0) {
return err;
}
}
}
return update_flags(state);
// software reset: 30.0 = 0x175C
// wait 2ms
// reset ports 0,1,2,3,4
}
/*
Uses only the VLAN port mask and the add tag mask to generate the other fields:
which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
*/
static void correct_vlan_state(struct ip175c_state *state)
{
int i, j;
state->num_vlans = 0;
for (i=0; i<MAX_VLANS; i++) {
if (state->vlan_ports[i] != 0) {
state->num_vlans = i+1; //hack -- we need to store the "set" vlans somewhere...
}
}
for (i=0; i<state->regs->NUM_PORTS; i++) {
unsigned int portmask = (1<<i);
if (!state->vlan_enabled) {
// share with everybody!
state->ports[i].shareports = (1<<state->regs->NUM_PORTS)-1;
continue;
}
state->ports[i].shareports = portmask;
for (j=0; j<MAX_VLANS; j++) {
if (state->vlan_ports[j] & portmask)
state->ports[i].shareports |= state->vlan_ports[j];
}
}
state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
}
static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state); // may be set in get_state.
if (err < 0)
return err;
val->value.i = state->vlan_enabled;
return 0;
}
static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
int enable;
int i;
err = get_state(state);
if (err < 0)
return err;
enable = val->value.i;
if (state->vlan_enabled == enable) {
// do not change any state.
return 0;
}
state->vlan_enabled = enable;
// Otherwise, if we are switching state, set fields to a known default.
state->remove_tag = 0x0000;
state->add_tag = 0x0000;
for (i = 0; i < MAX_PORTS; i++)
state->ports[i].shareports = 0xffff;
for (i = 0; i < MAX_VLANS; i++)
state->vlan_ports[i] = 0x0;
if (state->vlan_enabled) {
// updates other fields only based off vlan_ports and add_tag fields.
// Note that by default, no ports are in any vlans.
correct_vlan_state(state);
}
// ensure sane defaults?
return update_state(state);
}
static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
int b;
int ind;
unsigned int ports;
if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL;
err = get_state(state);
if (err<0)
return err;
ports = state->vlan_ports[val->port_vlan];
b = 0;
ind = 0;
while (b < MAX_PORTS) {
if (ports&1) {
int istagged = ((state->add_tag >> b) & 1);
val->value.ports[ind].id = b;
val->value.ports[ind].flags = (istagged << SWITCH_PORT_FLAG_TAGGED);
ind++;
}
b++;
ports >>= 1;
}
val->len = ind;
return 0;
}
static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int i;
int err;
if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
return -EINVAL;
err = get_state(state);
if (err < 0)
return err;
state->vlan_ports[val->port_vlan] = 0;
for (i = 0; i < val->len; i++) {
int bitmask = (1<<val->value.ports[i].id);
state->vlan_ports[val->port_vlan] |= bitmask;
if (val->value.ports[i].flags & (1<<SWITCH_PORT_FLAG_TAGGED)) {
state->add_tag |= bitmask;
} else {
state->add_tag &= (~bitmask);
}
}
correct_vlan_state(state);
err = update_state(state);
return err;
}
static int ip175c_apply(struct switch_dev *dev)
{
struct ip175c_state *state = dev->priv;
int err;
err = get_flags(state);
if (err < 0)
return err;
if (REG_SUPP(state->regs->MII_REGISTER_EN)){
int val = getPhy(state, state->regs->MII_REGISTER_EN);
if (val < 0) {
return val;
}
val |= (1<<state->regs->MII_REGISTER_EN_BIT);
return setPhy(state, state->regs->MII_REGISTER_EN, val);
}
return 0;
}
static int ip175c_reset(struct switch_dev *dev)
{
struct ip175c_state *state = dev->priv;
int i, err;
err = get_flags(state);
if (err < 0)
return err;
if (REG_SUPP(state->regs->RESET_REG)) {
err = setPhy(state, state->regs->RESET_REG, state->regs->RESET_VAL);
if (err < 0)
return err;
err = getPhy(state, state->regs->RESET_REG);
/* data sheet specifies reset period is 2 msec
(don't see any mention of the 2ms delay in the IP178C spec, only
in IP175C, but it can't hurt.) */
mdelay(2);
}
if (REG_SUPP(state->regs->MODE_REG)) {
err = setPhy(state, state->regs->MODE_REG, state->regs->RESET_VAL);
if (err < 0)
return err;
err = getPhy(state, state->regs->MODE_REG);
}
/* reset switch ports */
for (i = 0; i < 5; i++) {
err = state->mii_bus->write(state->mii_bus, i,
MII_BMCR, BMCR_RESET);
if (err < 0)
return err;
}
return 0;
}
/*! get the current register number */
static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state);
if (err < 0)
return err;
if (state->add_tag & (1<<val->port_vlan)) {
if (state->remove_tag & (1<<val->port_vlan))
val->value.i = 3; // shouldn't ever happen.
else
val->value.i = 1;
} else {
if (state->remove_tag & (1<<val->port_vlan))
val->value.i = 0;
else
val->value.i = 2;
}
return 0;
}
/*! set a new register address for low level access to registers */
static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int err;
err = get_state(state);
if (err < 0)
return err;
state->add_tag &= ~(1<<val->port_vlan);
state->remove_tag &= ~(1<<val->port_vlan);
if (val->value.i == 0)
state->remove_tag |= (1<<val->port_vlan);
if (val->value.i == 1)
state->add_tag |= (1<<val->port_vlan);
SET_PORT_BITS(state, state->add_tag,
state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
SET_PORT_BITS(state, state->remove_tag,
state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
return err;
}
/* low level /proc procedures */
/*! get the current phy address */
static int ip175c_get_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
val->value.i = state->proc_mii.p;
return 0;
}
/*! set a new phy address for low level access to registers */
static int ip175c_set_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int new_reg = val->value.i;
if (new_reg < 0 || new_reg > 31)
state->proc_mii.p = (u16)-1;
else
state->proc_mii.p = (u16)new_reg;
return 0;
}
/*! get the current register number */
static int ip175c_get_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
val->value.i = state->proc_mii.m;
return 0;
}
/*! set a new register address for low level access to registers */
static int ip175c_set_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int new_reg = val->value.i;
if (new_reg < 0 || new_reg > 31)
state->proc_mii.m = (u16)-1;
else
state->proc_mii.m = (u16)new_reg;
return 0;
}
/*! get the register content of state->proc_mii */
static int ip175c_get_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int retval = -EINVAL;
if (REG_SUPP(state->proc_mii))
retval = getPhy(state, state->proc_mii);
if (retval < 0) {
return retval;
} else {
val->value.i = retval;
return 0;
}
}
/*! write a value to the register defined by phy/reg above */
static int ip175c_set_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
int myval, err = 0;
myval = val->value.i;
if (myval <= 0xffff && myval >= 0 && REG_SUPP(state->proc_mii)) {
err = setPhy(state, state->proc_mii, (u16)myval);
}
return err;
}
static int ip175c_read_name(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
val->value.s = state->regs->NAME; // just a const pointer, won't be freed by swconfig.
return 0;
}
static int ip175c_set_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
struct mii_bus *bus = state->mii_bus;
int nr = val->port_vlan;
int ctrl;
int autoneg;
int speed;
if (val->value.i == 100) {
speed = 1;
autoneg = 0;
} else if (val->value.i == 10) {
speed = 0;
autoneg = 0;
} else {
autoneg = 1;
speed = 1;
}
/* can't set speed for cpu port */
if (nr == state->regs->CPU_PORT)
return -EINVAL;
if (nr >= dev->ports || nr < 0)
return -EINVAL;
ctrl = ip_phy_read(bus, nr, 0);
if (ctrl < 0)
return -EIO;
ctrl &= (~(1<<12));
ctrl &= (~(1<<13));
ctrl |= (autoneg<<12);
ctrl |= (speed<<13);
return ip_phy_write(bus, nr, 0, ctrl);
}
static int ip175c_get_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
struct mii_bus *bus = state->mii_bus;
int nr = val->port_vlan;
int speed, status;
if (nr == state->regs->CPU_PORT) {
val->value.i = 100;
return 0;
}
if (nr >= dev->ports || nr < 0)
return -EINVAL;
status = ip_phy_read(bus, nr, 1);
speed = ip_phy_read(bus, nr, 18);
if (status < 0 || speed < 0)
return -EIO;
if (status & 4)
val->value.i = ((speed & (1<<11)) ? 100 : 10);
else
val->value.i = 0;
return 0;
}
static int ip175c_get_port_status(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
{
struct ip175c_state *state = dev->priv;
struct mii_bus *bus = state->mii_bus;
int ctrl, speed, status;
int nr = val->port_vlan;
int len;
char *buf = state->buf; // fixed-length at 80.
if (nr == state->regs->CPU_PORT) {
sprintf(buf, "up, 100 Mbps, cpu port");
val->value.s = buf;
return 0;
}
if (nr >= dev->ports || nr < 0)
return -EINVAL;
ctrl = ip_phy_read(bus, nr, 0);
status = ip_phy_read(bus, nr, 1);
speed = ip_phy_read(bus, nr, 18);
if (ctrl < 0 || status < 0 || speed < 0)
return -EIO;
if (status & 4)
len = sprintf(buf, "up, %d Mbps, %s duplex",
((speed & (1<<11)) ? 100 : 10),
((speed & (1<<10)) ? "full" : "half"));
else
len = sprintf(buf, "down");
if (ctrl & (1<<12)) {
len += sprintf(buf+len, ", auto-negotiate");
if (!(status & (1<<5)))
len += sprintf(buf+len, " (in progress)");
} else {
len += sprintf(buf+len, ", fixed speed (%d)",
((ctrl & (1<<13)) ? 100 : 10));
}
buf[len] = '\0';
val->value.s = buf;
return 0;
}
static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
{
struct ip175c_state *state = dev->priv;
*val = state->ports[port].pvid;
return 0;
}
static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
{
struct ip175c_state *state = dev->priv;
state->ports[port].pvid = val;
if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port]))
return 0;
return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
}
enum Ports {
IP175C_PORT_STATUS,
IP175C_PORT_LINK,
IP175C_PORT_TAGGED,
IP175C_PORT_PVID,
};
enum Globals {
IP175C_ENABLE_VLAN,
IP175C_GET_NAME,
IP175C_REGISTER_PHY,
IP175C_REGISTER_MII,
IP175C_REGISTER_VALUE,
IP175C_REGISTER_ERRNO,
};
static const struct switch_attr ip175c_global[] = {
[IP175C_ENABLE_VLAN] = {
.id = IP175C_ENABLE_VLAN,
.type = SWITCH_TYPE_INT,
.name = "enable_vlan",
.description = "Flag to enable or disable VLANs and tagging",
.get = ip175c_get_enable_vlan,
.set = ip175c_set_enable_vlan,
},
[IP175C_GET_NAME] = {
.id = IP175C_GET_NAME,
.type = SWITCH_TYPE_STRING,
.description = "Returns the type of IC+ chip.",
.name = "name",
.get = ip175c_read_name,
.set = NULL,
},
/* jal: added for low level debugging etc. */
[IP175C_REGISTER_PHY] = {
.id = IP175C_REGISTER_PHY,
.type = SWITCH_TYPE_INT,
.description = "Direct register access: set phy (0-4, or 29,30,31)",
.name = "phy",
.get = ip175c_get_phy,
.set = ip175c_set_phy,
},
[IP175C_REGISTER_MII] = {
.id = IP175C_REGISTER_MII,
.type = SWITCH_TYPE_INT,
.description = "Direct register access: set mii number (0-31)",
.name = "reg",
.get = ip175c_get_reg,
.set = ip175c_set_reg,
},
[IP175C_REGISTER_VALUE] = {
.id = IP175C_REGISTER_VALUE,
.type = SWITCH_TYPE_INT,
.description = "Direct register access: read/write to register (0-65535)",
.name = "val",
.get = ip175c_get_val,
.set = ip175c_set_val,
},
};
static const struct switch_attr ip175c_vlan[] = {
};
static const struct switch_attr ip175c_port[] = {
[IP175C_PORT_STATUS] = {
.id = IP175C_PORT_STATUS,
.type = SWITCH_TYPE_STRING,
.description = "Returns Detailed port status",
.name = "status",
.get = ip175c_get_port_status,
.set = NULL,
},
[IP175C_PORT_LINK] = {
.id = IP175C_PORT_LINK,
.type = SWITCH_TYPE_INT,
.description = "Link speed. Can write 0 for auto-negotiate, or 10 or 100",
.name = "link",
.get = ip175c_get_port_speed,
.set = ip175c_set_port_speed,
},
[IP175C_PORT_TAGGED] = {
.id = IP175C_PORT_LINK,
.type = SWITCH_TYPE_INT,
.description = "0 = untag, 1 = add tags, 2 = do not alter (This value is reset if vlans are altered)",
.name = "tagged",
.get = ip175c_get_tagged,
.set = ip175c_set_tagged,
},
};
static int ip175c_probe(struct phy_device *pdev)
{
struct ip175c_state *state;
struct switch_dev *dev;
int err;
/* we only attach to PHY 0, but use all available PHYs */
if (pdev->addr != 0)
return -ENODEV;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;
dev = &state->dev;
dev->attr_global.attr = ip175c_global;
dev->attr_global.n_attr = ARRAY_SIZE(ip175c_global);
dev->attr_port.attr = ip175c_port;
dev->attr_port.n_attr = ARRAY_SIZE(ip175c_port);
dev->attr_vlan.attr = ip175c_vlan;
dev->attr_vlan.n_attr = ARRAY_SIZE(ip175c_vlan);
dev->get_port_pvid = ip175c_get_pvid;
dev->set_port_pvid = ip175c_set_pvid;
dev->get_vlan_ports = ip175c_get_ports;
dev->set_vlan_ports = ip175c_set_ports;
dev->apply_config = ip175c_apply;
dev->reset_switch = ip175c_reset;
dev->priv = state;
pdev->priv = state;
state->mii_bus = pdev->bus;
err = get_model(state);
if (err < 0)
goto error;
dev->vlans = MAX_VLANS;
dev->cpu_port = state->regs->CPU_PORT;
dev->ports = state->regs->NUM_PORTS;
dev->name = state->regs->NAME;
return 0;
error:
kfree(state);
return err;
}
static int ip175c_config_init(struct phy_device *pdev)
{
struct ip175c_state *state = pdev->priv;
struct net_device *dev = pdev->attached_dev;
int err;
pdev->irq = PHY_IGNORE_INTERRUPT;
err = register_switch(&state->dev, dev);
if (err < 0)
return err;
ip175c_reset(&state->dev);
state->registered = true;
netif_carrier_on(pdev->attached_dev);
return 0;
}
static void ip175c_remove(struct phy_device *pdev)
{
struct ip175c_state *state = pdev->priv;
if (state->registered)
unregister_switch(&state->dev);
kfree(state);
}
static int ip175c_config_aneg(struct phy_device *pdev)
{
return 0;
}
static int ip175c_read_status(struct phy_device *pdev)
{
pdev->speed = SPEED_100;
pdev->duplex = DUPLEX_FULL;
pdev->pause = pdev->asym_pause = 0;
return 0;
}
static struct phy_driver ip175c_driver = {
.name = "IC+ IP175C",
.phy_id = 0x02430d80,
.phy_id_mask = 0x0ffffff0,
.features = PHY_BASIC_FEATURES,
.probe = ip175c_probe,
.remove = ip175c_remove,
.config_init = ip175c_config_init,
.config_aneg = ip175c_config_aneg,
.read_status = ip175c_read_status,
.driver = { .owner = THIS_MODULE },
};
int __init ip175c_init(void)
{
return phy_driver_register(&ip175c_driver);
}
void __exit ip175c_exit(void)
{
phy_driver_unregister(&ip175c_driver);
}
MODULE_AUTHOR("Patrick Horn <patrick.horn@gmail.com>");
MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
MODULE_LICENSE("GPL");
module_init(ip175c_init);
module_exit(ip175c_exit);
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