diff options
Diffstat (limited to 'drivers/net/wan/lmc/lmc_media.c')
| -rw-r--r-- | drivers/net/wan/lmc/lmc_media.c | 1206 |
1 files changed, 1206 insertions, 0 deletions
diff --git a/drivers/net/wan/lmc/lmc_media.c b/drivers/net/wan/lmc/lmc_media.c new file mode 100644 index 000000000..ec1ac7b1f --- /dev/null +++ b/drivers/net/wan/lmc/lmc_media.c @@ -0,0 +1,1206 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* $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/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 <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/io.h> +#include <asm/dma.h> + +#include <linux/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). + */ + +/* + * 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 *, u32, u32, u32, u32, u32); + +lmc_media_t lmc_ds3_media = { + .init = lmc_ds3_init, /* special media init stuff */ + .defaults = lmc_ds3_default, /* reset to default state */ + .set_status = lmc_ds3_set_status, /* reset status to state provided */ + .set_clock_source = lmc_dummy_set_1, /* set clock source */ + .set_speed = lmc_dummy_set2_1, /* set line speed */ + .set_cable_length = lmc_ds3_set_100ft, /* set cable length */ + .set_scrambler = lmc_ds3_set_scram, /* set scrambler */ + .get_link_status = lmc_ds3_get_link_status, /* get link status */ + .set_link_status = lmc_dummy_set_1, /* set link status */ + .set_crc_length = lmc_ds3_set_crc_length, /* set CRC length */ + .set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */ + .watchdog = lmc_ds3_watchdog +}; + +lmc_media_t lmc_hssi_media = { + .init = lmc_hssi_init, /* special media init stuff */ + .defaults = lmc_hssi_default, /* reset to default state */ + .set_status = lmc_hssi_set_status, /* reset status to state provided */ + .set_clock_source = lmc_hssi_set_clock, /* set clock source */ + .set_speed = lmc_dummy_set2_1, /* set line speed */ + .set_cable_length = lmc_dummy_set_1, /* set cable length */ + .set_scrambler = lmc_dummy_set_1, /* set scrambler */ + .get_link_status = lmc_hssi_get_link_status, /* get link status */ + .set_link_status = lmc_hssi_set_link_status, /* set link status */ + .set_crc_length = lmc_hssi_set_crc_length, /* set CRC length */ + .set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */ + .watchdog = lmc_hssi_watchdog +}; + +lmc_media_t lmc_ssi_media = { + .init = lmc_ssi_init, /* special media init stuff */ + .defaults = lmc_ssi_default, /* reset to default state */ + .set_status = lmc_ssi_set_status, /* reset status to state provided */ + .set_clock_source = lmc_ssi_set_clock, /* set clock source */ + .set_speed = lmc_ssi_set_speed, /* set line speed */ + .set_cable_length = lmc_dummy_set_1, /* set cable length */ + .set_scrambler = lmc_dummy_set_1, /* set scrambler */ + .get_link_status = lmc_ssi_get_link_status, /* get link status */ + .set_link_status = lmc_ssi_set_link_status, /* set link status */ + .set_crc_length = lmc_ssi_set_crc_length, /* set CRC length */ + .set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */ + .watchdog = lmc_ssi_watchdog +}; + +lmc_media_t lmc_t1_media = { + .init = lmc_t1_init, /* special media init stuff */ + .defaults = lmc_t1_default, /* reset to default state */ + .set_status = lmc_t1_set_status, /* reset status to state provided */ + .set_clock_source = lmc_t1_set_clock, /* set clock source */ + .set_speed = lmc_dummy_set2_1, /* set line speed */ + .set_cable_length = lmc_dummy_set_1, /* set cable length */ + .set_scrambler = lmc_dummy_set_1, /* set scrambler */ + .get_link_status = lmc_t1_get_link_status, /* get link status */ + .set_link_status = lmc_dummy_set_1, /* set link status */ + .set_crc_length = lmc_t1_set_crc_length, /* set CRC length */ + .set_circuit_type = lmc_t1_set_circuit_type, /* set T1 or E1 circuit type */ + .watchdog = 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) +{ + u16 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) +{ + u16 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) +{ + u16 link_status; + u32 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->extra_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, u32 n, u32 m, u32 v, u32 x, u32 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) +{ + u16 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) +{ + u16 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) +{ + u16 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_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); + + 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; +} |