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openwrt-xburst/target/linux/generic-2.6/files/drivers/net/phy/ip175c.c
juhosg 2624270e11 ip17xx: Consolidate operations with PHY registers
Call mdiobus_{read,write} instead of duplicating their code.

Introduce ip_phy_write_masked(), which changes a part of a register. Will
be used later in this patch series. Please note that it does not hold any
lock between reading and writing, so it is up to the caller to serialize.

Also add DUMP_MII_IO, which enables logging of all MII accesses.

Signed-off-by: Martin Mares <mj@ucw.cz>
Signed-off-by: Patrick Horn <patrick.horn@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21709 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-06-08 20:17:55 +00:00

1340 lines
32 KiB
C

/*
* 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
#undef DUMP_MII_IO
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,-1,-1,-1,-1},
.SIMPLE_VLAN_REGISTERS = 0,
// Register 19-21 documentation is missing/contradictory.
// For registers 19-21 ports need to be: even numbers to MSB, odd to LSB.
// This contradicts text for ROM registers, but follows logic of CoS bits.
.VLAN_LOOKUP_REG = {0,19},// +N/2
.VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
.VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,-1,-1,-1,-1},
.VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,-1,-1,-1,-1},
.TAG_VLAN_MASK_REG = NOTSUPPORTED, // +N/2,
.TAG_VLAN_MASK_EVEN_BIT = {-1,-1,-1,-1,-1,-1,-1,-1,-1},
.TAG_VLAN_MASK_ODD_BIT = {-1,-1,-1,-1,-1,-1,-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 = 5,
.CPU_PORT = 4,
.MII_REGISTER_EN = {0, 18},
.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 ip175c_state *state, int port, int reg)
{
int val = mdiobus_read(state->mii_bus, port, reg);
if (val < 0)
pr_warning("IP175C: Unable to get MII register %d,%d: error %d\n", port, reg, -val);
#ifdef DUMP_MII_IO
else
pr_debug("IP175C: Read MII(%d,%d) -> %04x\n", port, reg, val);
#endif
return val;
}
static int ip_phy_write(struct ip175c_state *state, int port, int reg, u16 val)
{
int err;
#ifdef DUMP_MII_IO
pr_debug("IP175C: Write MII(%d,%d) <- %04x\n", port, reg, val);
#endif
err = mdiobus_write(state->mii_bus, port, reg, val);
if (err < 0)
pr_warning("IP175C: Unable to write MII register %d,%d: error %d\n", port, reg, -err);
return err;
}
static int ip_phy_write_masked(struct ip175c_state *state, int port, int reg, unsigned int mask, unsigned int data)
{
int val = ip_phy_read(state, port, reg);
if (val < 0)
return 0;
return ip_phy_write(state, port, reg, (val & ~mask) | data);
}
static int getPhy(struct ip175c_state *state, reg mii)
{
if (!REG_SUPP(mii))
return -EFAULT;
return ip_phy_read(state, mii.p, mii.m);
}
static int setPhy(struct ip175c_state *state, reg mii, u16 value)
{
int err;
if (!REG_SUPP(mii))
return -EFAULT;
err = ip_phy_write(state, mii.p, mii.m, value);
if (err < 0)
return err;
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 < state->regs->NUM_PORTS-1; i++) {
err = ip_phy_write(state, 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;
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(state, nr, 0);
if (ctrl < 0)
return -EIO;
ctrl &= (~(1<<12));
ctrl &= (~(1<<13));
ctrl |= (autoneg<<12);
ctrl |= (speed<<13);
return ip_phy_write(state, 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;
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(state, nr, 1);
speed = ip_phy_read(state, 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;
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(state, nr, 0);
status = ip_phy_read(state, nr, 1);
speed = ip_phy_read(state, 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 },
};
static struct phy_driver ip175a_driver = {
.name = "IC+ IP175A",
.phy_id = 0x02430c50,
.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)
{
int ret;
ret = phy_driver_register(&ip175a_driver);
if (ret < 0)
return ret;
return phy_driver_register(&ip175c_driver);
}
void __exit ip175c_exit(void)
{
phy_driver_unregister(&ip175c_driver);
phy_driver_unregister(&ip175a_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);