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linux/drivers/net/wan/lmc/lmc_media.c
Al Viro 79ea13ce07 NULL noise in drivers/net 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:07:12 -08:00

1225 lines
34 KiB
C
Raw Blame History

/* $Id: lmc_media.c,v 1.13 2000/04/11 05:25:26 asj Exp $ */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/inet.h>
#include <linux/bitops.h>
#include <net/syncppp.h>
#include <asm/processor.h> /* Processor type for cache alignment. */
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include "lmc.h"
#include "lmc_var.h"
#include "lmc_ioctl.h"
#include "lmc_debug.h"
#define CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE 1
/*
* Copyright (c) 1997-2000 LAN Media Corporation (LMC)
* All rights reserved. www.lanmedia.com
*
* This code is written by:
* Andrew Stanley-Jones (asj@cban.com)
* Rob Braun (bbraun@vix.com),
* Michael Graff (explorer@vix.com) and
* Matt Thomas (matt@3am-software.com).
*
* This software may be used and distributed according to the terms
* of the GNU General Public License version 2, incorporated herein by reference.
*/
/*
* protocol independent method.
*/
static void lmc_set_protocol (lmc_softc_t * const, lmc_ctl_t *);
/*
* media independent methods to check on media status, link, light LEDs,
* etc.
*/
static void lmc_ds3_init (lmc_softc_t * const);
static void lmc_ds3_default (lmc_softc_t * const);
static void lmc_ds3_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_ds3_set_100ft (lmc_softc_t * const, int);
static int lmc_ds3_get_link_status (lmc_softc_t * const);
static void lmc_ds3_set_crc_length (lmc_softc_t * const, int);
static void lmc_ds3_set_scram (lmc_softc_t * const, int);
static void lmc_ds3_watchdog (lmc_softc_t * const);
static void lmc_hssi_init (lmc_softc_t * const);
static void lmc_hssi_default (lmc_softc_t * const);
static void lmc_hssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_hssi_set_clock (lmc_softc_t * const, int);
static int lmc_hssi_get_link_status (lmc_softc_t * const);
static void lmc_hssi_set_link_status (lmc_softc_t * const, int);
static void lmc_hssi_set_crc_length (lmc_softc_t * const, int);
static void lmc_hssi_watchdog (lmc_softc_t * const);
static void lmc_ssi_init (lmc_softc_t * const);
static void lmc_ssi_default (lmc_softc_t * const);
static void lmc_ssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_ssi_set_clock (lmc_softc_t * const, int);
static void lmc_ssi_set_speed (lmc_softc_t * const, lmc_ctl_t *);
static int lmc_ssi_get_link_status (lmc_softc_t * const);
static void lmc_ssi_set_link_status (lmc_softc_t * const, int);
static void lmc_ssi_set_crc_length (lmc_softc_t * const, int);
static void lmc_ssi_watchdog (lmc_softc_t * const);
static void lmc_t1_init (lmc_softc_t * const);
static void lmc_t1_default (lmc_softc_t * const);
static void lmc_t1_set_status (lmc_softc_t * const, lmc_ctl_t *);
static int lmc_t1_get_link_status (lmc_softc_t * const);
static void lmc_t1_set_circuit_type (lmc_softc_t * const, int);
static void lmc_t1_set_crc_length (lmc_softc_t * const, int);
static void lmc_t1_set_clock (lmc_softc_t * const, int);
static void lmc_t1_watchdog (lmc_softc_t * const);
static void lmc_dummy_set_1 (lmc_softc_t * const, int);
static void lmc_dummy_set2_1 (lmc_softc_t * const, lmc_ctl_t *);
static inline void write_av9110_bit (lmc_softc_t *, int);
static void write_av9110 (lmc_softc_t *, u_int32_t, u_int32_t, u_int32_t,
u_int32_t, u_int32_t);
lmc_media_t lmc_ds3_media = {
lmc_ds3_init, /* special media init stuff */
lmc_ds3_default, /* reset to default state */
lmc_ds3_set_status, /* reset status to state provided */
lmc_dummy_set_1, /* set clock source */
lmc_dummy_set2_1, /* set line speed */
lmc_ds3_set_100ft, /* set cable length */
lmc_ds3_set_scram, /* set scrambler */
lmc_ds3_get_link_status, /* get link status */
lmc_dummy_set_1, /* set link status */
lmc_ds3_set_crc_length, /* set CRC length */
lmc_dummy_set_1, /* set T1 or E1 circuit type */
lmc_ds3_watchdog
};
lmc_media_t lmc_hssi_media = {
lmc_hssi_init, /* special media init stuff */
lmc_hssi_default, /* reset to default state */
lmc_hssi_set_status, /* reset status to state provided */
lmc_hssi_set_clock, /* set clock source */
lmc_dummy_set2_1, /* set line speed */
lmc_dummy_set_1, /* set cable length */
lmc_dummy_set_1, /* set scrambler */
lmc_hssi_get_link_status, /* get link status */
lmc_hssi_set_link_status, /* set link status */
lmc_hssi_set_crc_length, /* set CRC length */
lmc_dummy_set_1, /* set T1 or E1 circuit type */
lmc_hssi_watchdog
};
lmc_media_t lmc_ssi_media = { lmc_ssi_init, /* special media init stuff */
lmc_ssi_default, /* reset to default state */
lmc_ssi_set_status, /* reset status to state provided */
lmc_ssi_set_clock, /* set clock source */
lmc_ssi_set_speed, /* set line speed */
lmc_dummy_set_1, /* set cable length */
lmc_dummy_set_1, /* set scrambler */
lmc_ssi_get_link_status, /* get link status */
lmc_ssi_set_link_status, /* set link status */
lmc_ssi_set_crc_length, /* set CRC length */
lmc_dummy_set_1, /* set T1 or E1 circuit type */
lmc_ssi_watchdog
};
lmc_media_t lmc_t1_media = {
lmc_t1_init, /* special media init stuff */
lmc_t1_default, /* reset to default state */
lmc_t1_set_status, /* reset status to state provided */
lmc_t1_set_clock, /* set clock source */
lmc_dummy_set2_1, /* set line speed */
lmc_dummy_set_1, /* set cable length */
lmc_dummy_set_1, /* set scrambler */
lmc_t1_get_link_status, /* get link status */
lmc_dummy_set_1, /* set link status */
lmc_t1_set_crc_length, /* set CRC length */
lmc_t1_set_circuit_type, /* set T1 or E1 circuit type */
lmc_t1_watchdog
};
static void
lmc_dummy_set_1 (lmc_softc_t * const sc, int a)
{
}
static void
lmc_dummy_set2_1 (lmc_softc_t * const sc, lmc_ctl_t * a)
{
}
/*
* HSSI methods
*/
static void
lmc_hssi_init (lmc_softc_t * const sc)
{
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5200;
lmc_gpio_mkoutput (sc, LMC_GEP_HSSI_CLOCK);
}
static void
lmc_hssi_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_hssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in clock source
*/
if (ctl->clock_source && !sc->ictl.clock_source)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
}
else if (!ctl->clock_source && sc->ictl.clock_source)
{
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
}
lmc_set_protocol (sc, ctl);
}
/*
* 1 == internal, 0 == external
*/
static void
lmc_hssi_set_clock (lmc_softc_t * const sc, int ie)
{
int old;
old = sc->ictl.clock_source;
if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_gpio |= LMC_GEP_HSSI_CLOCK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_gpio &= ~(LMC_GEP_HSSI_CLOCK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
}
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_hssi_get_link_status (lmc_softc_t * const sc)
{
/*
* We're using the same code as SSI since
* they're practically the same
*/
return lmc_ssi_get_link_status(sc);
}
static void
lmc_hssi_set_link_status (lmc_softc_t * const sc, int state)
{
if (state == LMC_LINK_UP)
sc->lmc_miireg16 |= LMC_MII16_HSSI_TA;
else
sc->lmc_miireg16 &= ~LMC_MII16_HSSI_TA;
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_hssi_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_HSSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_HSSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_hssi_watchdog (lmc_softc_t * const sc)
{
/* HSSI is blank */
}
/*
* DS3 methods
*/
/*
* Set cable length
*/
static void
lmc_ds3_set_100ft (lmc_softc_t * const sc, int ie)
{
if (ie == LMC_CTL_CABLE_LENGTH_GT_100FT)
{
sc->lmc_miireg16 &= ~LMC_MII16_DS3_ZERO;
sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_GT_100FT;
}
else if (ie == LMC_CTL_CABLE_LENGTH_LT_100FT)
{
sc->lmc_miireg16 |= LMC_MII16_DS3_ZERO;
sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_LT_100FT;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_ds3_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_cable_length (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
sc->lmc_media->set_scrambler (sc, LMC_CTL_OFF);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_ds3_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_cable_length (sc, sc->ictl.cable_length);
sc->lmc_media->set_scrambler (sc, sc->ictl.scrambler_onoff);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in cable length setting
*/
if (ctl->cable_length && !sc->ictl.cable_length)
lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_GT_100FT);
else if (!ctl->cable_length && sc->ictl.cable_length)
lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
/*
* Check for change in scrambler setting (requires reset)
*/
if (ctl->scrambler_onoff && !sc->ictl.scrambler_onoff)
lmc_ds3_set_scram (sc, LMC_CTL_ON);
else if (!ctl->scrambler_onoff && sc->ictl.scrambler_onoff)
lmc_ds3_set_scram (sc, LMC_CTL_OFF);
lmc_set_protocol (sc, ctl);
}
static void
lmc_ds3_init (lmc_softc_t * const sc)
{
int i;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5245;
/* writes zeros everywhere */
for (i = 0; i < 21; i++)
{
lmc_mii_writereg (sc, 0, 17, i);
lmc_mii_writereg (sc, 0, 18, 0);
}
/* set some essential bits */
lmc_mii_writereg (sc, 0, 17, 1);
lmc_mii_writereg (sc, 0, 18, 0x25); /* ser, xtx */
lmc_mii_writereg (sc, 0, 17, 5);
lmc_mii_writereg (sc, 0, 18, 0x80); /* emode */
lmc_mii_writereg (sc, 0, 17, 14);
lmc_mii_writereg (sc, 0, 18, 0x30); /* rcgen, tcgen */
/* clear counters and latched bits */
for (i = 0; i < 21; i++)
{
lmc_mii_writereg (sc, 0, 17, i);
lmc_mii_readreg (sc, 0, 18);
}
}
/*
* 1 == DS3 payload scrambled, 0 == not scrambled
*/
static void
lmc_ds3_set_scram (lmc_softc_t * const sc, int ie)
{
if (ie == LMC_CTL_ON)
{
sc->lmc_miireg16 |= LMC_MII16_DS3_SCRAM;
sc->ictl.scrambler_onoff = LMC_CTL_ON;
}
else
{
sc->lmc_miireg16 &= ~LMC_MII16_DS3_SCRAM;
sc->ictl.scrambler_onoff = LMC_CTL_OFF;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_ds3_get_link_status (lmc_softc_t * const sc)
{
u_int16_t link_status, link_status_11;
int ret = 1;
lmc_mii_writereg (sc, 0, 17, 7);
link_status = lmc_mii_readreg (sc, 0, 18);
/* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
* led0 yellow = far-end adapter is in Red alarm condition
* led1 blue = received an Alarm Indication signal
* (upstream failure)
* led2 Green = power to adapter, Gate Array loaded & driver
* attached
* led3 red = Loss of Signal (LOS) or out of frame (OOF)
* conditions detected on T3 receive signal
*/
lmc_led_on(sc, LMC_DS3_LED2);
if ((link_status & LMC_FRAMER_REG0_DLOS) ||
(link_status & LMC_FRAMER_REG0_OOFS)){
ret = 0;
if(sc->last_led_err[3] != 1){
u16 r1;
lmc_mii_writereg (sc, 0, 17, 01); /* Turn on Xbit error as our cisco does */
r1 = lmc_mii_readreg (sc, 0, 18);
r1 &= 0xfe;
lmc_mii_writereg(sc, 0, 18, r1);
printk(KERN_WARNING "%s: Red Alarm - Loss of Signal or Loss of Framing\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED3); /* turn on red LED */
sc->last_led_err[3] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED3); /* turn on red LED */
if(sc->last_led_err[3] == 1){
u16 r1;
lmc_mii_writereg (sc, 0, 17, 01); /* Turn off Xbit error */
r1 = lmc_mii_readreg (sc, 0, 18);
r1 |= 0x01;
lmc_mii_writereg(sc, 0, 18, r1);
}
sc->last_led_err[3] = 0;
}
lmc_mii_writereg(sc, 0, 17, 0x10);
link_status_11 = lmc_mii_readreg(sc, 0, 18);
if((link_status & LMC_FRAMER_REG0_AIS) ||
(link_status_11 & LMC_FRAMER_REG10_XBIT)) {
ret = 0;
if(sc->last_led_err[0] != 1){
printk(KERN_WARNING "%s: AIS Alarm or XBit Error\n", sc->name);
printk(KERN_WARNING "%s: Remote end has loss of signal or framing\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 0;
}
lmc_mii_writereg (sc, 0, 17, 9);
link_status = lmc_mii_readreg (sc, 0, 18);
if(link_status & LMC_FRAMER_REG9_RBLUE){
ret = 0;
if(sc->last_led_err[1] != 1){
printk(KERN_WARNING "%s: Blue Alarm - Receiving all 1's\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED1);
sc->last_led_err[1] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED1);
sc->last_led_err[1] = 0;
}
return ret;
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_ds3_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_DS3_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_DS3_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_ds3_watchdog (lmc_softc_t * const sc)
{
}
/*
* SSI methods
*/
static void
lmc_ssi_init (lmc_softc_t * const sc)
{
u_int16_t mii17;
int cable;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1000;
mii17 = lmc_mii_readreg (sc, 0, 17);
cable = (mii17 & LMC_MII17_SSI_CABLE_MASK) >> LMC_MII17_SSI_CABLE_SHIFT;
sc->ictl.cable_type = cable;
lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
}
static void
lmc_ssi_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
/*
* make TXCLOCK always be an output
*/
lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_media->set_speed (sc, NULL);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_ssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
sc->lmc_media->set_speed (sc, &sc->ictl);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in clock source
*/
if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_INT
&& sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
}
else if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_EXT
&& sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_INT)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
}
if (ctl->clock_rate != sc->ictl.clock_rate)
sc->lmc_media->set_speed (sc, ctl);
lmc_set_protocol (sc, ctl);
}
/*
* 1 == internal, 0 == external
*/
static void
lmc_ssi_set_clock (lmc_softc_t * const sc, int ie)
{
int old;
old = ie;
if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
if(ie != old)
printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
if(ie != old)
printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
}
}
static void
lmc_ssi_set_speed (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
lmc_ctl_t *ictl = &sc->ictl;
lmc_av9110_t *av;
/* original settings for clock rate of:
* 100 Khz (8,25,0,0,2) were incorrect
* they should have been 80,125,1,3,3
* There are 17 param combinations to produce this freq.
* For 1.5 Mhz use 120,100,1,1,2 (226 param. combinations)
*/
if (ctl == NULL)
{
av = &ictl->cardspec.ssi;
ictl->clock_rate = 1500000;
av->f = ictl->clock_rate;
av->n = 120;
av->m = 100;
av->v = 1;
av->x = 1;
av->r = 2;
write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
return;
}
av = &ctl->cardspec.ssi;
if (av->f == 0)
return;
ictl->clock_rate = av->f; /* really, this is the rate we are */
ictl->cardspec.ssi = *av;
write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_ssi_get_link_status (lmc_softc_t * const sc)
{
u_int16_t link_status;
u_int32_t ticks;
int ret = 1;
int hw_hdsk = 1;
/*
* missing CTS? Hmm. If we require CTS on, we may never get the
* link to come up, so omit it in this test.
*
* Also, it seems that with a loopback cable, DCD isn't asserted,
* so just check for things like this:
* DSR _must_ be asserted.
* One of DCD or CTS must be asserted.
*/
/* LMC 1000 (SSI) LED definitions
* led0 Green = power to adapter, Gate Array loaded &
* driver attached
* led1 Green = DSR and DTR and RTS and CTS are set
* led2 Green = Cable detected
* led3 red = No timing is available from the
* cable or the on-board frequency
* generator.
*/
link_status = lmc_mii_readreg (sc, 0, 16);
/* Is the transmit clock still available */
ticks = LMC_CSR_READ (sc, csr_gp_timer);
ticks = 0x0000ffff - (ticks & 0x0000ffff);
lmc_led_on (sc, LMC_MII16_LED0);
/* ====== transmit clock determination ===== */
if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_INT) {
lmc_led_off(sc, LMC_MII16_LED3);
}
else if (ticks == 0 ) { /* no clock found ? */
ret = 0;
if(sc->last_led_err[3] != 1){
sc->stats.tx_lossOfClockCnt++;
printk(KERN_WARNING "%s: Lost Clock, Link Down\n", sc->name);
}
sc->last_led_err[3] = 1;
lmc_led_on (sc, LMC_MII16_LED3); /* turn ON red LED */
}
else {
if(sc->last_led_err[3] == 1)
printk(KERN_WARNING "%s: Clock Returned\n", sc->name);
sc->last_led_err[3] = 0;
lmc_led_off (sc, LMC_MII16_LED3); /* turn OFF red LED */
}
if ((link_status & LMC_MII16_SSI_DSR) == 0) { /* Also HSSI CA */
ret = 0;
hw_hdsk = 0;
}
#ifdef CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE
if ((link_status & (LMC_MII16_SSI_CTS | LMC_MII16_SSI_DCD)) == 0){
ret = 0;
hw_hdsk = 0;
}
#endif
if(hw_hdsk == 0){
if(sc->last_led_err[1] != 1)
printk(KERN_WARNING "%s: DSR not asserted\n", sc->name);
sc->last_led_err[1] = 1;
lmc_led_off(sc, LMC_MII16_LED1);
}
else {
if(sc->last_led_err[1] != 0)
printk(KERN_WARNING "%s: DSR now asserted\n", sc->name);
sc->last_led_err[1] = 0;
lmc_led_on(sc, LMC_MII16_LED1);
}
if(ret == 1) {
lmc_led_on(sc, LMC_MII16_LED2); /* Over all good status? */
}
return ret;
}
static void
lmc_ssi_set_link_status (lmc_softc_t * const sc, int state)
{
if (state == LMC_LINK_UP)
{
sc->lmc_miireg16 |= (LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
printk (LMC_PRINTF_FMT ": asserting DTR and RTS\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_miireg16 &= ~(LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
printk (LMC_PRINTF_FMT ": deasserting DTR and RTS\n", LMC_PRINTF_ARGS);
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_ssi_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_SSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_SSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* These are bits to program the ssi frequency generator
*/
static inline void
write_av9110_bit (lmc_softc_t * sc, int c)
{
/*
* set the data bit as we need it.
*/
sc->lmc_gpio &= ~(LMC_GEP_CLK);
if (c & 0x01)
sc->lmc_gpio |= LMC_GEP_DATA;
else
sc->lmc_gpio &= ~(LMC_GEP_DATA);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* set the clock to high
*/
sc->lmc_gpio |= LMC_GEP_CLK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* set the clock to low again.
*/
sc->lmc_gpio &= ~(LMC_GEP_CLK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
}
static void
write_av9110 (lmc_softc_t * sc, u_int32_t n, u_int32_t m, u_int32_t v,
u_int32_t x, u_int32_t r)
{
int i;
#if 0
printk (LMC_PRINTF_FMT ": speed %u, %d %d %d %d %d\n",
LMC_PRINTF_ARGS, sc->ictl.clock_rate, n, m, v, x, r);
#endif
sc->lmc_gpio |= LMC_GEP_SSI_GENERATOR;
sc->lmc_gpio &= ~(LMC_GEP_DATA | LMC_GEP_CLK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* Set the TXCLOCK, GENERATOR, SERIAL, and SERIALCLK
* as outputs.
*/
lmc_gpio_mkoutput (sc, (LMC_GEP_DATA | LMC_GEP_CLK
| LMC_GEP_SSI_GENERATOR));
sc->lmc_gpio &= ~(LMC_GEP_SSI_GENERATOR);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* a shifting we will go...
*/
for (i = 0; i < 7; i++)
write_av9110_bit (sc, n >> i);
for (i = 0; i < 7; i++)
write_av9110_bit (sc, m >> i);
for (i = 0; i < 1; i++)
write_av9110_bit (sc, v >> i);
for (i = 0; i < 2; i++)
write_av9110_bit (sc, x >> i);
for (i = 0; i < 2; i++)
write_av9110_bit (sc, r >> i);
for (i = 0; i < 5; i++)
write_av9110_bit (sc, 0x17 >> i);
/*
* stop driving serial-related signals
*/
lmc_gpio_mkinput (sc,
(LMC_GEP_DATA | LMC_GEP_CLK
| LMC_GEP_SSI_GENERATOR));
}
static void
lmc_ssi_watchdog (lmc_softc_t * const sc)
{
u_int16_t mii17 = lmc_mii_readreg (sc, 0, 17);
if (((mii17 >> 3) & 7) == 7)
{
lmc_led_off (sc, LMC_MII16_LED2);
}
else
{
lmc_led_on (sc, LMC_MII16_LED2);
}
}
/*
* T1 methods
*/
/*
* The framer regs are multiplexed through MII regs 17 & 18
* write the register address to MII reg 17 and the * data to MII reg 18. */
static void
lmc_t1_write (lmc_softc_t * const sc, int a, int d)
{
lmc_mii_writereg (sc, 0, 17, a);
lmc_mii_writereg (sc, 0, 18, d);
}
/* Save a warning
static int
lmc_t1_read (lmc_softc_t * const sc, int a)
{
lmc_mii_writereg (sc, 0, 17, a);
return lmc_mii_readreg (sc, 0, 18);
}
*/
static void
lmc_t1_init (lmc_softc_t * const sc)
{
u_int16_t mii16;
int i;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1200;
mii16 = lmc_mii_readreg (sc, 0, 16);
/* reset 8370 */
mii16 &= ~LMC_MII16_T1_RST;
lmc_mii_writereg (sc, 0, 16, mii16 | LMC_MII16_T1_RST);
lmc_mii_writereg (sc, 0, 16, mii16);
/* set T1 or E1 line. Uses sc->lmcmii16 reg in function so update it */
sc->lmc_miireg16 = mii16;
lmc_t1_set_circuit_type(sc, LMC_CTL_CIRCUIT_TYPE_T1);
mii16 = sc->lmc_miireg16;
lmc_t1_write (sc, 0x01, 0x1B); /* CR0 - primary control */
lmc_t1_write (sc, 0x02, 0x42); /* JAT_CR - jitter atten config */
lmc_t1_write (sc, 0x14, 0x00); /* LOOP - loopback config */
lmc_t1_write (sc, 0x15, 0x00); /* DL3_TS - external data link timeslot */
lmc_t1_write (sc, 0x18, 0xFF); /* PIO - programmable I/O */
lmc_t1_write (sc, 0x19, 0x30); /* POE - programmable OE */
lmc_t1_write (sc, 0x1A, 0x0F); /* CMUX - clock input mux */
lmc_t1_write (sc, 0x20, 0x41); /* LIU_CR - RX LIU config */
lmc_t1_write (sc, 0x22, 0x76); /* RLIU_CR - RX LIU config */
lmc_t1_write (sc, 0x40, 0x03); /* RCR0 - RX config */
lmc_t1_write (sc, 0x45, 0x00); /* RALM - RX alarm config */
lmc_t1_write (sc, 0x46, 0x05); /* LATCH - RX alarm/err/cntr latch */
lmc_t1_write (sc, 0x68, 0x40); /* TLIU_CR - TX LIU config */
lmc_t1_write (sc, 0x70, 0x0D); /* TCR0 - TX framer config */
lmc_t1_write (sc, 0x71, 0x05); /* TCR1 - TX config */
lmc_t1_write (sc, 0x72, 0x0B); /* TFRM - TX frame format */
lmc_t1_write (sc, 0x73, 0x00); /* TERROR - TX error insert */
lmc_t1_write (sc, 0x74, 0x00); /* TMAN - TX manual Sa/FEBE config */
lmc_t1_write (sc, 0x75, 0x00); /* TALM - TX alarm signal config */
lmc_t1_write (sc, 0x76, 0x00); /* TPATT - TX test pattern config */
lmc_t1_write (sc, 0x77, 0x00); /* TLB - TX inband loopback config */
lmc_t1_write (sc, 0x90, 0x05); /* CLAD_CR - clock rate adapter config */
lmc_t1_write (sc, 0x91, 0x05); /* CSEL - clad freq sel */
lmc_t1_write (sc, 0xA6, 0x00); /* DL1_CTL - DL1 control */
lmc_t1_write (sc, 0xB1, 0x00); /* DL2_CTL - DL2 control */
lmc_t1_write (sc, 0xD0, 0x47); /* SBI_CR - sys bus iface config */
lmc_t1_write (sc, 0xD1, 0x70); /* RSB_CR - RX sys bus config */
lmc_t1_write (sc, 0xD4, 0x30); /* TSB_CR - TX sys bus config */
for (i = 0; i < 32; i++)
{
lmc_t1_write (sc, 0x0E0 + i, 0x00); /* SBCn - sys bus per-channel ctl */
lmc_t1_write (sc, 0x100 + i, 0x00); /* TPCn - TX per-channel ctl */
lmc_t1_write (sc, 0x180 + i, 0x00); /* RPCn - RX per-channel ctl */
}
for (i = 1; i < 25; i++)
{
lmc_t1_write (sc, 0x0E0 + i, 0x0D); /* SBCn - sys bus per-channel ctl */
}
mii16 |= LMC_MII16_T1_XOE;
lmc_mii_writereg (sc, 0, 16, mii16);
sc->lmc_miireg16 = mii16;
}
static void
lmc_t1_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
/* Right now we can only clock from out internal source */
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
}
/* * Given a user provided state, set ourselves up to match it. This will * always reset the card if needed.
*/
static void
lmc_t1_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_circuit_type (sc, sc->ictl.circuit_type);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in circuit type */
if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_T1
&& sc->ictl.circuit_type ==
LMC_CTL_CIRCUIT_TYPE_E1) sc->lmc_media->set_circuit_type (sc,
LMC_CTL_CIRCUIT_TYPE_E1);
else if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_E1
&& sc->ictl.circuit_type == LMC_CTL_CIRCUIT_TYPE_T1)
sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
lmc_set_protocol (sc, ctl);
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/ static int
lmc_t1_get_link_status (lmc_softc_t * const sc)
{
u_int16_t link_status;
int ret = 1;
/* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
* led0 yellow = far-end adapter is in Red alarm condition
* led1 blue = received an Alarm Indication signal
* (upstream failure)
* led2 Green = power to adapter, Gate Array loaded & driver
* attached
* led3 red = Loss of Signal (LOS) or out of frame (OOF)
* conditions detected on T3 receive signal
*/
lmc_trace(sc->lmc_device, "lmc_t1_get_link_status in");
lmc_led_on(sc, LMC_DS3_LED2);
lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM1_STATUS);
link_status = lmc_mii_readreg (sc, 0, 18);
if (link_status & T1F_RAIS) { /* turn on blue LED */
ret = 0;
if(sc->last_led_err[1] != 1){
printk(KERN_WARNING "%s: Receive AIS/Blue Alarm. Far end in RED alarm\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED1);
sc->last_led_err[1] = 1;
}
else {
if(sc->last_led_err[1] != 0){
printk(KERN_WARNING "%s: End AIS/Blue Alarm\n", sc->name);
}
lmc_led_off (sc, LMC_DS3_LED1);
sc->last_led_err[1] = 0;
}
/*
* Yellow Alarm is nasty evil stuff, looks at data patterns
* inside the channel and confuses it with HDLC framing
* ignore all yellow alarms.
*
* Do listen to MultiFrame Yellow alarm which while implemented
* different ways isn't in the channel and hence somewhat
* more reliable
*/
if (link_status & T1F_RMYEL) {
ret = 0;
if(sc->last_led_err[0] != 1){
printk(KERN_WARNING "%s: Receive Yellow AIS Alarm\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 1;
}
else {
if(sc->last_led_err[0] != 0){
printk(KERN_WARNING "%s: End of Yellow AIS Alarm\n", sc->name);
}
lmc_led_off(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 0;
}
/*
* Loss of signal and los of frame
* Use the green bit to identify which one lit the led
*/
if(link_status & T1F_RLOF){
ret = 0;
if(sc->last_led_err[3] != 1){
printk(KERN_WARNING "%s: Local Red Alarm: Loss of Framing\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED3);
sc->last_led_err[3] = 1;
}
else {
if(sc->last_led_err[3] != 0){
printk(KERN_WARNING "%s: End Red Alarm (LOF)\n", sc->name);
}
if( ! (link_status & T1F_RLOS))
lmc_led_off(sc, LMC_DS3_LED3);
sc->last_led_err[3] = 0;
}
if(link_status & T1F_RLOS){
ret = 0;
if(sc->last_led_err[2] != 1){
printk(KERN_WARNING "%s: Local Red Alarm: Loss of Signal\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED3);
sc->last_led_err[2] = 1;
}
else {
if(sc->last_led_err[2] != 0){
printk(KERN_WARNING "%s: End Red Alarm (LOS)\n", sc->name);
}
if( ! (link_status & T1F_RLOF))
lmc_led_off(sc, LMC_DS3_LED3);
sc->last_led_err[2] = 0;
}
sc->lmc_xinfo.t1_alarm1_status = link_status;
lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM2_STATUS);
sc->lmc_xinfo.t1_alarm2_status = lmc_mii_readreg (sc, 0, 18);
lmc_trace(sc->lmc_device, "lmc_t1_get_link_status out");
return ret;
}
/*
* 1 == T1 Circuit Type , 0 == E1 Circuit Type
*/
static void
lmc_t1_set_circuit_type (lmc_softc_t * const sc, int ie)
{
if (ie == LMC_CTL_CIRCUIT_TYPE_T1) {
sc->lmc_miireg16 |= LMC_MII16_T1_Z;
sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_T1;
printk(KERN_INFO "%s: In T1 Mode\n", sc->name);
}
else {
sc->lmc_miireg16 &= ~LMC_MII16_T1_Z;
sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_E1;
printk(KERN_INFO "%s: In E1 Mode\n", sc->name);
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 0 == 16bit, 1 == 32bit */
static void
lmc_t1_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_T1_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
}
else
{
/* 16 bit */ sc->lmc_miireg16 &= ~LMC_MII16_T1_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 1 == internal, 0 == external
*/
static void
lmc_t1_set_clock (lmc_softc_t * const sc, int ie)
{
int old;
old = ie;
if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
}
}
static void
lmc_t1_watchdog (lmc_softc_t * const sc)
{
}
static void
lmc_set_protocol (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (!ctl)
sc->ictl.keepalive_onoff = LMC_CTL_ON;
}
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