FreeBSD/Linux Kernel Cross Reference
sys/dev/cx/cxreg.h

     /*-
      * Defines for Cronyx-Sigma adapter, based on Cirrus Logic multiprotocol
      * controller RISC processor CL-CD2400/2401.
      *
      * Copyright (C) 1994-2000 Cronyx Engineering.
      * Author: Serge Vakulenko, <vak@cronyx.ru>
      *
      * This software is distributed with NO WARRANTIES, not even the implied
      * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     *
     * Authors grant any other persons or organisations permission to use
     * or modify this software as long as this message is kept with the software,
     * all derivative works or modified versions.
     *
     * Cronyx Id: cxreg.h,v 1.1.2.1 2003/11/12 17:13:41 rik Exp $
     * $FreeBSD: releng/8.3/sys/dev/cx/cxreg.h 139749 2005-01-06 01:43:34Z imp $
     */
    #define REVCL_MIN   7           /* CD2400 min. revision number G */
    #define REVCL_MAX   13          /* CD2400 max. revision number M */
    #define REVCL31_MIN 0x33        /* CD2431 min. revision number C */
    #define REVCL31_MAX 0x34        /* CD2431 max. revision number D */
    
    #define BRD_INTR_LEVEL 0x5a     /* interrupt level (arbitrary PILR value) */
    
    #define CS0(p)  ((p) | 0x8000)  /* chip select 0 */
    #define CS1(p)  ((p) | 0xc000)  /* chip select 1 */
    #define CS1A(p) ((p) | 0x8010)  /* chip select 1 for agp-compatible models */
    #define BSR(p)  (p)             /* board status register, read only */
    #define BCR0(p) (p)             /* board command register 0, write only */
    #define BCR1(p) ((p) | 0x2000)  /* board command register 1, write only */
    
    /*
     * For Sigma-800 only.
     */
    #define BDET(p) ((p) | 0x2000)  /* board detection register, read only */
    #define BCR2(p) ((p) | 0x4000)  /* board command register 2, write only */
    
    /*
     * Chip register address, B is chip base port, R is chip register number.
     */
    #define R(b,r) ((b) | (((r)<<6 & 0x3c00) | ((r) & 0xf)))
    
    /*
     * Interrupt acknowledge register, P is board port, L is interrupt level,
     * as prodrammed in PILR.
     */
    #define IACK(p,l)   (R(p,l) | 0x4000)
    
    /*
     * Global registers.
     */
    #define GFRCR(b)    R(b,0x82)   /* global firmware revision code register */
    #define CAR(b)      R(b,0xec)   /* channel access register */
    
    /*
     * Option registers.
     */
    #define CMR(b)      R(b,0x18)   /* channel mode register */
    #define COR1(b)     R(b,0x13)   /* channel option register 1 */
    #define COR2(b)     R(b,0x14)   /* channel option register 2 */
    #define COR3(b)     R(b,0x15)   /* channel option register 3 */
    #define COR4(b)     R(b,0x16)   /* channel option register 4 */
    #define COR5(b)     R(b,0x17)   /* channel option register 5 */
    #define COR6(b)     R(b,0x1b)   /* channel option register 6 */
    #define COR7(b)     R(b,0x04)   /* channel option register 7 */
    #define SCHR1(b)    R(b,0x1c)   /* special character register 1 */
    #define SCHR2(b)    R(b,0x1d)   /* special character register 2 */
    #define SCHR3(b)    R(b,0x1e)   /* special character register 3 */
    #define SCHR4(b)    R(b,0x1f)   /* special character register 4 */
    #define SCRL(b)     R(b,0x20)   /* special character range low */
    #define SCRH(b)     R(b,0x21)   /* special character range high */
    #define LNXT(b)     R(b,0x2d)   /* LNext character */
    #define RFAR1(b)    R(b,0x1c)   /* receive frame address register 1 */
    #define RFAR2(b)    R(b,0x1d)   /* receive frame address register 2 */
    #define RFAR3(b)    R(b,0x1e)   /* receive frame address register 3 */
    #define RFAR4(b)    R(b,0x1f)   /* receive frame address register 4 */
    #define CPSR(b)     R(b,0xd4)   /* CRC polynomial select register */
    
    /*
     * Bit rate and clock option registers.
     */
    #define RBPR(b)     R(b,0xc9)   /* receive baud rate period register */
    #define RCOR(b)     R(b,0xca)   /* receive clock option register */
    #define TBPR(b)     R(b,0xc1)   /* transmit baud rate period register */
    #define TCOR(b)     R(b,0xc2)   /* receive clock option register */
    
    /*
     * Channel command and status registers.
     */
    #define CCR(b)      R(b,0x10)   /* channel command register */
    #define STCR(b)     R(b,0x11)   /* special transmit command register */
    #define CSR(b)      R(b,0x19)   /* channel status register */
    #define MSVR(b)     R(b,0xdc)   /* modem signal value register */
    #define MSVR_RTS(b) R(b,0xdc)   /* modem RTS setup register */
    #define MSVR_DTR(b) R(b,0xdd)   /* modem DTR setup register */
    
    /*
     * Interrupt registers.
     */
   #define LIVR(b)     R(b,0x0a)   /* local interrupt vector register */
   #define IER(b)      R(b,0x12)   /* interrupt enable register */
   #define LICR(b)     R(b,0x25)   /* local interrupting channel register */
   #define STK(b)      R(b,0xe0)   /* stack register */
   
   /*
    * Receive interrupt registers.
    */
   #define RPILR(b)    R(b,0xe3)   /* receive priority interrupt level register */
   #define RIR(b)      R(b,0xef)   /* receive interrupt register */
   #define RISR(b)     R(b,0x8a)   /* receive interrupt status register */
   #define RISRL(b)    R(b,0x8a)   /* receive interrupt status register low */
   #define RISRH(b)    R(b,0x8b)   /* receive interrupt status register high */
   #define RFOC(b)     R(b,0x33)   /* receive FIFO output count */
   #define RDR(b)      R(b,0xf8)   /* receive data register */
   #define REOIR(b)    R(b,0x87)   /* receive end of interrupt register */
   
   /*
    * Transmit interrupt registers.
    */
   #define TPILR(b)    R(b,0xe2)   /* transmit priority interrupt level reg */
   #define TIR(b)      R(b,0xee)   /* transmit interrupt register */
   #define TISR(b)     R(b,0x89)   /* transmit interrupt status register */
   #define TFTC(b)     R(b,0x83)   /* transmit FIFO transfer count */
   #define TDR(b)      R(b,0xf8)   /* transmit data register */
   #define TEOIR(b)    R(b,0x86)   /* transmit end of interrupt register */
   
   /*
    * Modem interrupt registers.
    */
   #define MPILR(b)    R(b,0xe1)   /* modem priority interrupt level register */
   #define MIR(b)      R(b,0xed)   /* modem interrupt register */
   #define MISR(b)     R(b,0x88)   /* modem/timer interrupt status register */
   #define MEOIR(b)    R(b,0x85)   /* modem end of interrupt register */
   
   /*
    * DMA registers.
    */
   #define DMR(b)      R(b,0xf4)   /* DMA mode register */
   #define BERCNT(b)   R(b,0x8d)   /* bus error retry count */
   #define DMABSTS(b)  R(b,0x1a)   /* DMA buffer status */
   
   /*
    * DMA receive registers.
    */
   #define ARBADRL(b)  R(b,0x40)   /* A receive buffer address lower */
   #define ARBADRU(b)  R(b,0x42)   /* A receive buffer address upper */
   #define BRBADRL(b)  R(b,0x44)   /* B receive buffer address lower */
   #define BRBADRU(b)  R(b,0x46)   /* B receive buffer address upper */
   #define ARBCNT(b)   R(b,0x48)   /* A receive buffer byte count */
   #define BRBCNT(b)   R(b,0x4a)   /* B receive buffer byte count */
   #define ARBSTS(b)   R(b,0x4c)   /* A receive buffer status */
   #define BRBSTS(b)   R(b,0x4d)   /* B receive buffer status */
   #define RCBADRL(b)  R(b,0x3c)   /* receive current buffer address lower */
   #define RCBADRU(b)  R(b,0x3e)   /* receive current buffer address upper */
   
   /*
    * DMA transmit registers.
    */
   #define ATBADRL(b)  R(b,0x50)   /* A transmit buffer address lower */
   #define ATBADRU(b)  R(b,0x52)   /* A transmit buffer address upper */
   #define BTBADRL(b)  R(b,0x54)   /* B transmit buffer address lower */
   #define BTBADRU(b)  R(b,0x56)   /* B transmit buffer address upper */
   #define ATBCNT(b)   R(b,0x58)   /* A transmit buffer byte count */
   #define BTBCNT(b)   R(b,0x5a)   /* B transmit buffer byte count */
   #define ATBSTS(b)   R(b,0x5c)   /* A transmit buffer status */
   #define BTBSTS(b)   R(b,0x5d)   /* B transmit buffer status */
   #define TCBADRL(b)  R(b,0x38)   /* transmit current buffer address lower */
   #define TCBADRU(b)  R(b,0x3a)   /* transmit current buffer address upper */
   
   /*
    * Timer registers.
    */
   #define TPR(b)      R(b,0xd8)   /* timer period register */
   #define RTPR(b)     R(b,0x26)   /* receive timeout period register */
   #define RTPRL(b)    R(b,0x26)   /* receive timeout period register low */
   #define RTPTH(b)    R(b,0x27)   /* receive timeout period register high */
   #define GT1(b)      R(b,0x28)   /* general timer 1 */
   #define GT1L(b)     R(b,0x28)   /* general timer 1 low */
   #define GT1H(b)     R(b,0x29)   /* general timer 1 high */
   #define GT2(b)      R(b,0x2a)   /* general timer 2 */
   #define TTR(b)      R(b,0x2a)   /* transmit timer register */
   
   /*
    * Board status register bits, for all models.
    */
   #define BSR_NOINTR     0x01     /* no interrupt pending flag */
   #define BSR_NOCHAIN    0x80     /* no daisy chained board, all but Sigma-22 */
   
   /*
    * For old Sigmas only.
    */
   #define BSR_VAR_MASK   0x66     /* adapter variant mask */
   #define BSR_OSC_MASK   0x18     /* oscillator frequency mask */
   #define BSR_OSC_20     0x18     /* 20 MHz */
   #define BSR_OSC_18432  0x10     /* 18.432 MHz */
   
   #define BSR_NODSR(n)   (0x100 << (n))   /* DSR from channels 0-3, inverted */
   #define BSR_NOCD(n)    (0x1000 << (n))  /* CD from channels 0-3, inverted */
   
   /*
    * Board status register bits for Sigma-2x.
    */
   #define BSR2X_OSC_33     0x08   /* oscillator 33/20 MHz bit */
   #define BSR2X_VAR_MASK   0x30   /* Sigma-2x variant mask */
   
   /*
    * Board status register bits for Sigma-800.
    */
   #define BSR800_NU0       0x02   /* no channels 0-3 installed */
   #define BSR800_NU1       0x04   /* no channels 4-7 installed */
   #define BSR800_LERR      0x08   /* firmware load error */
   #define BSR800_MIRQ      0x10   /* modem IRQ active */
   #define BSR800_TIRQ      0x20   /* transmit IRQ active */
   #define BSR800_RIRQ      0x40   /* receive IRQ active */
   
   #define BDET_IB          0x08   /* identification bit */
   #define BDET_IB_NEG      0x80   /* negated identification bit */
   
   /*
    * Sigma-800 control register 2 bits.
    */
   #define BCR2_BUS0       0x01    /* bus timing control */
   #define BCR2_BUS1       0x02    /* bus timing control */
   #define BCR2_TMS        0x08    /* firmware download signal */
   #define BCR2_TDI        0x80    /* firmware download signal */
   
   /*
    * Board revision mask.
    */
   #define BSR_REV_MASK     (BSR_OSC_MASK|BSR_VAR_MASK|BSR_NOCHAIN)
   #define BSR2X_REV_MASK   (BSR_OSC_MASK|BSR_VAR_MASK)
   
   /*
    * Sigma-2x variants.
    */
   #define CRONYX_22       0x20
   #define CRONYX_24       0x00
   
   /*
    * Sigma-XXX variants.
    */
   #define CRONYX_100      0x64
   #define CRONYX_400      0x62
   #define CRONYX_500      0x60
   #define CRONYX_410      0x24
   #define CRONYX_810      0x20
   #define CRONYX_410s     0x04
   #define CRONYX_810s     0x00
   #define CRONYX_440      0x44
   #define CRONYX_840      0x40
   #define CRONYX_401      0x26
   #define CRONYX_801      0x22
   #define CRONYX_401s     0x06
   #define CRONYX_801s     0x02
   #define CRONYX_404      0x46
   #define CRONYX_703      0x42
   
   /*
    * Board control register 0 bits.
    */
   #define BCR0_IRQ_DIS  0x00      /* no interrupt generated */
   #define BCR0_IRQ_3    0x01      /* select IRQ number 3 */
   #define BCR0_IRQ_5    0x02      /* select IRQ number 5 */
   #define BCR0_IRQ_7    0x03      /* select IRQ number 7 */
   #define BCR0_IRQ_10   0x04      /* select IRQ number 10 */
   #define BCR0_IRQ_11   0x05      /* select IRQ number 11 */
   #define BCR0_IRQ_12   0x06      /* select IRQ number 12 */
   #define BCR0_IRQ_15   0x07      /* select IRQ number 15 */
   #define BCR0_IRQ_MASK 0x07      /* irq select mask */
   
   #define BCR0_DMA_DIS  0x00      /* no interrupt generated */
   #define BCR0_DMA_5    0x10      /* select DMA channel 5 */
   #define BCR0_DMA_6    0x20      /* select DMA channel 6 */
   #define BCR0_DMA_7    0x30      /* select DMA channel 7 */
   #define BCR0_DMA_MASK 0x30      /* drq select mask */
   
   /* For old Sigmas only. */
   #define BCR0_NORESET  0x08      /* CD2400 reset flag (inverted) */
   
   #define BCR0_UM_ASYNC 0x00      /* channel 0 mode - async */
   #define BCR0_UM_SYNC  0x80      /* channel 0 mode - sync */
   #define BCR0_UI_RS232 0x00      /* channel 0 interface - RS-232 */
   #define BCR0_UI_RS449 0x40      /* channel 0 interface - RS-449/V.35 */
   #define BCR0_UMASK    0xc0      /* channel 0 interface mask */
   
   /* For Sigma-22 only. */
   #define BCR02X_FAST   0x40      /* fast bus timing */
   #define BCR02X_LED    0x80      /* LED control */
   
   /* For Sigma-800 only. */
   #define BCR0800_TCK   0x80      /* firmware download signal */
   
   /*
    * Board control register 1 bits.
    */
   /* For old Sigmas only. */
   #define BCR1_DTR(n)    (0x100 << (n))   /* DTR for channels 0-3 sync */
   
   /* For Sigma-800 only. */
   #define BCR1800_DTR(n) (1 << ((n) & 7)) /* DTR for channels 0-7 sync */
   
   /*
    * Channel commands (CCR).
    */
   #define CCR_CLRCH  0x40         /* clear channel */
   #define CCR_INITCH 0x20         /* initialize channel */
   #define CCR_RSTALL 0x10         /* reset all channels */
   #define CCR_ENTX   0x08         /* enable transmitter */
   #define CCR_DISTX  0x04         /* disable transmitter */
   #define CCR_ENRX   0x02         /* enable receiver */
   #define CCR_DISRX  0x01         /* disable receiver */
   #define CCR_CLRT1  0xc0         /* clear timer 1 */
   #define CCR_CLRT2  0xa0         /* clear timer 2 */
   #define CCR_CLRRCV 0x90         /* clear receiver */
   #define CCR_CLRTX  0x88         /* clear transmitter */
   
   /*
    * Interrupt enable register (IER) bits.
    */
   #define IER_MDM    0x80         /* modem status changed */
   #define IER_RET    0x20         /* receive exception timeout */
   #define IER_RXD    0x08         /* data received */
   #define IER_TIMER  0x04         /* timer expired */
   #define IER_TXMPTY 0x02         /* transmitter empty */
   #define IER_TXD    0x01         /* data transmitted */
   
   /*
    * Modem signal values register bits (MSVR).
    */
   #define MSV_DSR    0x80         /* state of Data Set Ready input */
   #define MSV_CD     0x40         /* state of Carrier Detect input */
   #define MSV_CTS    0x20         /* state of Clear to Send input */
   #define MSV_TXCOUT 0x10         /* TXCout/DTR pin output flag */
   #define MSV_PORTID 0x04         /* device is CL-CD2401 (not 2400) */
   #define MSV_DTR    0x02         /* state of Data Terminal Ready output */
   #define MSV_RTS    0x01         /* state of Request to Send output */
   #define MSV_BITS "\2\1rts\2dtr\3cd2400\5txcout\6cts\7cd\10dsr"
   
   /*
    * DMA buffer status register bits (DMABSTS).
    */
   #define DMABSTS_TDALIGN 0x80    /* internal data alignment in transmit FIFO */
   #define DMABSTS_RSTAPD  0x40    /* reset append mode */
   #define DMABSTS_CRTTBUF 0x20    /* internal current transmit buffer in use */
   #define DMABSTS_APPEND  0x10    /* append buffer is in use */
   #define DMABSTS_NTBUF   0x08    /* next transmit buffer is B (not A) */
   #define DMABSTS_TBUSY   0x04    /* current transmit buffer is in use */
   #define DMABSTS_NRBUF   0x02    /* next receive buffer is B (not A) */
   #define DMABSTS_RBUSY   0x01    /* current receive buffer is in use */
   
   /*
    * Buffer status register bits ([AB][RT]BSTS).
    */
   #define BSTS_BUSERR 0x80        /* bus error */
   #define BSTS_EOFR   0x40        /* end of frame */
   #define BSTS_EOBUF  0x20        /* end of buffer */
   #define BSTS_APPEND 0x08        /* append mode */
   #define BSTS_INTR   0x02        /* interrupt required */
   #define BSTS_OWN24  0x01        /* buffer is (free to be) used by CD2400 */
   #define BSTS_BITS "\2\1own24\2intr\4append\6eobuf\7eofr\10buserr"
   
   /*
    * Receive interrupt status register (RISR) bits.
    */
   #define RIS_OVERRUN   0x0008    /* overrun error */
   #define RIS_BB        0x0800    /* buffer B status (not A) */
   #define RIS_EOBUF     0x2000    /* end of buffer reached */
   #define RIS_EOFR      0x4000    /* frame reception complete */
   #define RIS_BUSERR    0x8000    /* bus error */
   
   #define RISH_CLRDCT   0x0001    /* X.21 clear detect */
   #define RISH_RESIND   0x0004    /* residual indication */
   #define RISH_CRCERR   0x0010    /* CRC error */
   #define RISH_RXABORT  0x0020    /* abort sequence received */
   #define RISH_EOFR     0x0040    /* complete frame received */
   #define RISH_BITS "\2\1clrdct\3resind\4overrun\5crcerr\6rxabort\7eofr\14bb\16eobuf\17eofr\20buserr"
   
   #define RISA_BREAK    0x0001    /* break signal detected */
   #define RISA_FRERR    0x0002    /* frame error (bad stop bits) */
   #define RISA_PARERR   0x0004    /* parity error */
   #define RISA_SCMASK   0x0070    /* special character detect mask */
   #define RISA_SCHR1    0x0010    /* special character 1 detected */
   #define RISA_SCHR2    0x0020    /* special character 2 detected */
   #define RISA_SCHR3    0x0030    /* special character 3 detected */
   #define RISA_SCHR4    0x0040    /* special character 4 detected */
   #define RISA_SCRANGE  0x0070    /* special character in range detected */
   #define RISA_TIMEOUT  0x0080    /* receive timeout, no data */
   #define RISA_BITS "\2\1break\2frerr\3parerr\4overrun\5schr1\6schr2\7schr4\10timeout\14bb\16eobuf\17eofr\20buserr"
   
   #define RISB_CRCERR   0x0010    /* CRC error */
   #define RISB_RXABORT  0x0020    /* abort sequence received */
   #define RISB_EOFR     0x0040    /* complete frame received */
   
   #define RISX_LEADCHG  0x0001    /* CTS lead change */
   #define RISX_PARERR   0x0004    /* parity error */
   #define RISX_SCMASK   0x0070    /* special character detect mask */
   #define RISX_SCHR1    0x0010    /* special character 1 detected */
   #define RISX_SCHR2    0x0020    /* special character 2 detected */
   #define RISX_SCHR3    0x0030    /* special character 3 detected */
   #define RISX_ALLZERO  0x0040    /* all 0 condition detected */
   #define RISX_ALLONE   0x0050    /* all 1 condition detected */
   #define RISX_ALTOZ    0x0060    /* alternating 1 0 condition detected */
   #define RISX_SYN      0x0070    /* SYN detected */
   #define RISX_LEAD     0x0080    /* leading value */
   
   /*
    * Channel mode register (CMR) bits.
    */
   #define CMR_RXDMA     0x80      /* DMA receive transfer mode */
   #define CMR_TXDMA     0x40      /* DMA transmit transfer mode */
   #define CMR_HDLC      0x00      /* HDLC protocol mode */
   #define CMR_BISYNC    0x01      /* BISYNC protocol mode */
   #define CMR_ASYNC     0x02      /* ASYNC protocol mode */
   #define CMR_X21       0x03      /* X.21 protocol mode */
   
   /*
    * Modem interrupt status register (MISR) bits.
    */
   #define MIS_CDSR      0x80      /* DSR changed */
   #define MIS_CCD       0x40      /* CD changed */
   #define MIS_CCTS      0x20      /* CTS changed */
   #define MIS_CGT2      0x02      /* GT2 timer expired */
   #define MIS_CGT1      0x01      /* GT1 timer expired */
   #define MIS_BITS "\2\1gt1\2gt2\6ccts\7ccd\10cdsr"
   
   /*
    * Transmit interrupt status register (TISR) bits.
    */
   #define TIS_BUSERR    0x80      /* Bus error */
   #define TIS_EOFR      0x40      /* End of frame */
   #define TIS_EOBUF     0x20      /* end of transmit buffer reached */
   #define TIS_UNDERRUN  0x10      /* transmit underrun */
   #define TIS_BB        0x08      /* buffer B status (not A) */
   #define TIS_TXEMPTY   0x02      /* transmitter empty */
   #define TIS_TXDATA    0x01      /* transmit data below threshold */
   #define TIS_BITS "\2\1txdata\2txempty\4bb\5underrun\6eobuf\7eofr\10buserr"
   
   /*
    * Local interrupt vector register (LIVR) bits.
    */
   #define LIV_EXCEP     0
   #define LIV_MODEM     1
   #define LIV_TXDATA    2
   #define LIV_RXDATA    3
   
   /*
    * Transmit end of interrupt registers (TEOIR) bits.
    */
   #define TEOI_TERMBUFF  0x80     /* force current buffer to be discarded */
   #define TEOI_EOFR      0x40     /* end of frame in interrupt mode */
   #define TEOI_SETTM2    0x20     /* set general timer 2 in sync mode */
   #define TEOI_SETTM1    0x10     /* set general timer 1 in sync mode */
   #define TEOI_NOTRANSF  0x08     /* no transfer of data on this interrupt */
   
   /*
    * Receive end of interrupt registers (REOIR) bits.
    */
   #define REOI_TERMBUFF  0x80     /* force current buffer to be terminated */
   #define REOI_DISCEXC   0x40     /* discard exception character */
   #define REOI_SETTM2    0x20     /* set general timer 2 */
   #define REOI_SETTM1    0x10     /* set general timer 1 */
   #define REOI_NOTRANSF  0x08     /* no transfer of data */
   #define REOI_GAP_MASK  0x07     /* optional gap size to leave in buffer */
   
   /*
    * Special transmit command register (STCR) bits.
    */
   #define STC_ABORTTX   0x40      /* abort transmission (HDLC mode) */
   #define STC_APPDCMP   0x20      /* append complete (async DMA mode) */
   #define STC_SNDSPC    0x08      /* send special characters (async mode) */
   #define STC_SSPC_MASK 0x07      /* special character select */
   #define STC_SSPC_1    0x01      /* send special character #1 */
   #define STC_SSPC_2    0x02      /* send special character #2 */
   #define STC_SSPC_3    0x03      /* send special character #3 */
   #define STC_SSPC_4    0x04      /* send special character #4 */
   
   /*
    * Channel status register (CSR) bits, asynchronous mode.
    */
   #define CSRA_RXEN    0x80       /* receiver enable */
   #define CSRA_RXFLOFF 0x40       /* receiver flow off */
   #define CSRA_RXFLON  0x20       /* receiver flow on */
   #define CSRA_TXEN    0x08       /* transmitter enable */
   #define CSRA_TXFLOFF 0x04       /* transmitter flow off */
   #define CSRA_TXFLON  0x02       /* transmitter flow on */
   #define CSRA_BITS "\2\2txflon\3txfloff\4txen\6rxflon\7rxfloff\10rxen"

Cache object: 8df367cca2f0cce9c9e53a6fbab70bde