sgiserial.h
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- /* sgiserial.h: Definitions for the SGI Zilog85C30 serial driver.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- */
- #ifndef _SGI_SERIAL_H
- #define _SGI_SERIAL_H
- /* Just one channel */
- struct sgi_zschannel {
- #ifdef __MIPSEB__
- volatile unsigned char unused0[3];
- volatile unsigned char control;
- volatile unsigned char unused1[3];
- volatile unsigned char data;
- #else /* __MIPSEL__ */
- volatile unsigned char control;
- volatile unsigned char unused0[3];
- volatile unsigned char data;
- volatile unsigned char unused1[3];
- #endif
- };
- /* The address space layout for each zs chip. Yes they are
- * backwards.
- */
- struct sgi_zslayout {
- struct sgi_zschannel channelB;
- struct sgi_zschannel channelA;
- };
- #define NUM_ZSREGS 16
- struct serial_struct {
- int type;
- int line;
- int port;
- int irq;
- int flags;
- int xmit_fifo_size;
- int custom_divisor;
- int baud_base;
- unsigned short close_delay;
- char reserved_char[2];
- int hub6;
- unsigned short closing_wait; /* time to wait before closing */
- unsigned short closing_wait2; /* no longer used... */
- int reserved[4];
- };
- /*
- * For the close wait times, 0 means wait forever for serial port to
- * flush its output. 65535 means don't wait at all.
- */
- #define ZILOG_CLOSING_WAIT_INF 0
- #define ZILOG_CLOSING_WAIT_NONE 65535
- /*
- * Definitions for ZILOG_struct (and serial_struct) flags field
- */
- #define ZILOG_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
- on the callout port */
- #define ZILOG_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
- #define ZILOG_SAK 0x0004 /* Secure Attention Key (Orange book) */
- #define ZILOG_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
- #define ZILOG_SPD_MASK 0x0030
- #define ZILOG_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
- #define ZILOG_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
- #define ZILOG_SPD_CUST 0x0030 /* Use user-specified divisor */
- #define ZILOG_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
- #define ZILOG_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
- #define ZILOG_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
- #define ZILOG_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
- #define ZILOG_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
- #define ZILOG_FLAGS 0x0FFF /* Possible legal ZILOG flags */
- #define ZILOG_USR_MASK 0x0430 /* Legal flags that non-privileged
- * users can set or reset */
- /* Internal flags used only by kernel/chr_drv/serial.c */
- #define ZILOG_INITIALIZED 0x80000000 /* Serial port was initialized */
- #define ZILOG_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
- #define ZILOG_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
- #define ZILOG_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
- #define ZILOG_CLOSING 0x08000000 /* Serial port is closing */
- #define ZILOG_CTS_FLOW 0x04000000 /* Do CTS flow control */
- #define ZILOG_CHECK_CD 0x02000000 /* i.e., CLOCAL */
- /* Software state per channel */
- #ifdef __KERNEL__
- /*
- * This is our internal structure for each serial port's state.
- *
- * Many fields are paralleled by the structure used by the serial_struct
- * structure.
- *
- * For definitions of the flags field, see tty.h
- */
- struct sgi_serial {
- struct sgi_serial *zs_next; /* For IRQ servicing chain */
- struct sgi_zschannel *zs_channel; /* Channel registers */
- unsigned char read_reg_zero;
- char soft_carrier; /* Use soft carrier on this channel */
- char cons_keyb; /* Channel runs the keyboard */
- char cons_mouse; /* Channel runs the mouse */
- char break_abort; /* Is serial console in, so process brk/abrt */
- char kgdb_channel; /* Kgdb is running on this channel */
- char is_cons; /* Is this our console. */
- /* We need to know the current clock divisor
- * to read the bps rate the chip has currently
- * loaded.
- */
- unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */
- int zs_baud;
- /* Current write register values */
- unsigned char curregs[NUM_ZSREGS];
- /* Values we need to set next opportunity */
- unsigned char pendregs[NUM_ZSREGS];
- char change_needed;
- int magic;
- int baud_base;
- int port;
- int irq;
- int flags; /* defined in tty.h */
- int type; /* UART type */
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
- int timeout;
- int xmit_fifo_size;
- int custom_divisor;
- int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- unsigned short closing_wait2;
- unsigned long event;
- unsigned long last_active;
- int line;
- int count; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
- struct tq_struct tqueue;
- struct tq_struct tqueue_hangup;
- struct termios normal_termios;
- struct termios callout_termios;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
- };
- #define SERIAL_MAGIC 0x5301
- /*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
- #define SERIAL_XMIT_SIZE 4096
- /*
- * Events are used to schedule things to happen at timer-interrupt
- * time, instead of at rs interrupt time.
- */
- #define RS_EVENT_WRITE_WAKEUP 0
- #endif /* __KERNEL__ */
- /* Conversion routines to/from brg time constants from/to bits
- * per second.
- */
- #define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2))
- #define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2)
- /* The Zilog register set */
- #define FLAG 0x7e
- /* Write Register 0 */
- #define R0 0 /* Register selects */
- #define R1 1
- #define R2 2
- #define R3 3
- #define R4 4
- #define R5 5
- #define R6 6
- #define R7 7
- #define R8 8
- #define R9 9
- #define R10 10
- #define R11 11
- #define R12 12
- #define R13 13
- #define R14 14
- #define R15 15
- #define NULLCODE 0 /* Null Code */
- #define POINT_HIGH 0x8 /* Select upper half of registers */
- #define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */
- #define SEND_ABORT 0x18 /* HDLC Abort */
- #define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */
- #define RES_Tx_P 0x28 /* Reset TxINT Pending */
- #define ERR_RES 0x30 /* Error Reset */
- #define RES_H_IUS 0x38 /* Reset highest IUS */
- #define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */
- #define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */
- #define RES_EOM_L 0xC0 /* Reset EOM latch */
- /* Write Register 1 */
- #define EXT_INT_ENAB 0x1 /* Ext Int Enable */
- #define TxINT_ENAB 0x2 /* Tx Int Enable */
- #define PAR_SPEC 0x4 /* Parity is special condition */
- #define RxINT_DISAB 0 /* Rx Int Disable */
- #define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */
- #define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */
- #define INT_ERR_Rx 0x18 /* Int on error only */
- #define WT_RDY_RT 0x20 /* Wait/Ready on R/T */
- #define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */
- #define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */
- /* Write Register #2 (Interrupt Vector) */
- /* Write Register 3 */
- #define RxENABLE 0x1 /* Rx Enable */
- #define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */
- #define ADD_SM 0x4 /* Address Search Mode (SDLC) */
- #define RxCRC_ENAB 0x8 /* Rx CRC Enable */
- #define ENT_HM 0x10 /* Enter Hunt Mode */
- #define AUTO_ENAB 0x20 /* Auto Enables */
- #define Rx5 0x0 /* Rx 5 Bits/Character */
- #define Rx7 0x40 /* Rx 7 Bits/Character */
- #define Rx6 0x80 /* Rx 6 Bits/Character */
- #define Rx8 0xc0 /* Rx 8 Bits/Character */
- /* Write Register 4 */
- #define PAR_ENA 0x1 /* Parity Enable */
- #define PAR_EVEN 0x2 /* Parity Even/Odd* */
- #define SYNC_ENAB 0 /* Sync Modes Enable */
- #define SB1 0x4 /* 1 stop bit/char */
- #define SB15 0x8 /* 1.5 stop bits/char */
- #define SB2 0xc /* 2 stop bits/char */
- #define MONSYNC 0 /* 8 Bit Sync character */
- #define BISYNC 0x10 /* 16 bit sync character */
- #define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */
- #define EXTSYNC 0x30 /* External Sync Mode */
- #define X1CLK 0x0 /* x1 clock mode */
- #define X16CLK 0x40 /* x16 clock mode */
- #define X32CLK 0x80 /* x32 clock mode */
- #define X64CLK 0xC0 /* x64 clock mode */
- /* Write Register 5 */
- #define TxCRC_ENAB 0x1 /* Tx CRC Enable */
- #define RTS 0x2 /* RTS */
- #define SDLC_CRC 0x4 /* SDLC/CRC-16 */
- #define TxENAB 0x8 /* Tx Enable */
- #define SND_BRK 0x10 /* Send Break */
- #define Tx5 0x0 /* Tx 5 bits (or less)/character */
- #define Tx7 0x20 /* Tx 7 bits/character */
- #define Tx6 0x40 /* Tx 6 bits/character */
- #define Tx8 0x60 /* Tx 8 bits/character */
- #define DTR 0x80 /* DTR */
- /* Write Register 6 (Sync bits 0-7/SDLC Address Field) */
- /* Write Register 7 (Sync bits 8-15/SDLC 01111110) */
- /* Write Register 8 (transmit buffer) */
- /* Write Register 9 (Master interrupt control) */
- #define VIS 1 /* Vector Includes Status */
- #define NV 2 /* No Vector */
- #define DLC 4 /* Disable Lower Chain */
- #define MIE 8 /* Master Interrupt Enable */
- #define STATHI 0x10 /* Status high */
- #define NORESET 0 /* No reset on write to R9 */
- #define CHRB 0x40 /* Reset channel B */
- #define CHRA 0x80 /* Reset channel A */
- #define FHWRES 0xc0 /* Force hardware reset */
- /* Write Register 10 (misc control bits) */
- #define BIT6 1 /* 6 bit/8bit sync */
- #define LOOPMODE 2 /* SDLC Loop mode */
- #define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */
- #define MARKIDLE 8 /* Mark/flag on idle */
- #define GAOP 0x10 /* Go active on poll */
- #define NRZ 0 /* NRZ mode */
- #define NRZI 0x20 /* NRZI mode */
- #define FM1 0x40 /* FM1 (transition = 1) */
- #define FM0 0x60 /* FM0 (transition = 0) */
- #define CRCPS 0x80 /* CRC Preset I/O */
- /* Write Register 11 (Clock Mode control) */
- #define TRxCXT 0 /* TRxC = Xtal output */
- #define TRxCTC 1 /* TRxC = Transmit clock */
- #define TRxCBR 2 /* TRxC = BR Generator Output */
- #define TRxCDP 3 /* TRxC = DPLL output */
- #define TRxCOI 4 /* TRxC O/I */
- #define TCRTxCP 0 /* Transmit clock = RTxC pin */
- #define TCTRxCP 8 /* Transmit clock = TRxC pin */
- #define TCBR 0x10 /* Transmit clock = BR Generator output */
- #define TCDPLL 0x18 /* Transmit clock = DPLL output */
- #define RCRTxCP 0 /* Receive clock = RTxC pin */
- #define RCTRxCP 0x20 /* Receive clock = TRxC pin */
- #define RCBR 0x40 /* Receive clock = BR Generator output */
- #define RCDPLL 0x60 /* Receive clock = DPLL output */
- #define RTxCX 0x80 /* RTxC Xtal/No Xtal */
- /* Write Register 12 (lower byte of baud rate generator time constant) */
- /* Write Register 13 (upper byte of baud rate generator time constant) */
- /* Write Register 14 (Misc control bits) */
- #define BRENABL 1 /* Baud rate generator enable */
- #define BRSRC 2 /* Baud rate generator source */
- #define DTRREQ 4 /* DTR/Request function */
- #define AUTOECHO 8 /* Auto Echo */
- #define LOOPBAK 0x10 /* Local loopback */
- #define SEARCH 0x20 /* Enter search mode */
- #define RMC 0x40 /* Reset missing clock */
- #define DISDPLL 0x60 /* Disable DPLL */
- #define SSBR 0x80 /* Set DPLL source = BR generator */
- #define SSRTxC 0xa0 /* Set DPLL source = RTxC */
- #define SFMM 0xc0 /* Set FM mode */
- #define SNRZI 0xe0 /* Set NRZI mode */
- /* Write Register 15 (external/status interrupt control) */
- #define ZCIE 2 /* Zero count IE */
- #define DCDIE 8 /* DCD IE */
- #define SYNCIE 0x10 /* Sync/hunt IE */
- #define CTSIE 0x20 /* CTS IE */
- #define TxUIE 0x40 /* Tx Underrun/EOM IE */
- #define BRKIE 0x80 /* Break/Abort IE */
- /* Read Register 0 */
- #define Rx_CH_AV 0x1 /* Rx Character Available */
- #define ZCOUNT 0x2 /* Zero count */
- #define Tx_BUF_EMP 0x4 /* Tx Buffer empty */
- #define DCD 0x8 /* DCD */
- #define SYNC 0x10 /* Sync/hunt */
- #define CTS 0x20 /* CTS */
- #define TxEOM 0x40 /* Tx underrun */
- #define BRK_ABRT 0x80 /* Break/Abort */
- /* Read Register 1 */
- #define ALL_SNT 0x1 /* All sent */
- /* Residue Data for 8 Rx bits/char programmed */
- #define RES3 0x8 /* 0/3 */
- #define RES4 0x4 /* 0/4 */
- #define RES5 0xc /* 0/5 */
- #define RES6 0x2 /* 0/6 */
- #define RES7 0xa /* 0/7 */
- #define RES8 0x6 /* 0/8 */
- #define RES18 0xe /* 1/8 */
- #define RES28 0x0 /* 2/8 */
- /* Special Rx Condition Interrupts */
- #define PAR_ERR 0x10 /* Parity error */
- #define Rx_OVR 0x20 /* Rx Overrun Error */
- #define CRC_ERR 0x40 /* CRC/Framing Error */
- #define END_FR 0x80 /* End of Frame (SDLC) */
- /* Read Register 2 (channel b only) - Interrupt vector */
- /* Read Register 3 (interrupt pending register) ch a only */
- #define CHBEXT 0x1 /* Channel B Ext/Stat IP */
- #define CHBTxIP 0x2 /* Channel B Tx IP */
- #define CHBRxIP 0x4 /* Channel B Rx IP */
- #define CHAEXT 0x8 /* Channel A Ext/Stat IP */
- #define CHATxIP 0x10 /* Channel A Tx IP */
- #define CHARxIP 0x20 /* Channel A Rx IP */
- /* Read Register 8 (receive data register) */
- /* Read Register 10 (misc status bits) */
- #define ONLOOP 2 /* On loop */
- #define LOOPSEND 0x10 /* Loop sending */
- #define CLK2MIS 0x40 /* Two clocks missing */
- #define CLK1MIS 0x80 /* One clock missing */
- /* Read Register 12 (lower byte of baud rate generator constant) */
- /* Read Register 13 (upper byte of baud rate generator constant) */
- /* Read Register 15 (value of WR 15) */
- /* Misc inlines */
- extern inline void ZS_CLEARERR(struct sgi_zschannel *channel)
- {
- volatile unsigned char junk;
- udelay(2);
- channel->control = ERR_RES;
- if (ioc_icontrol)
- junk = ioc_icontrol->istat0;
- }
- extern inline void ZS_CLEARFIFO(struct sgi_zschannel *channel)
- {
- volatile unsigned char junk;
- udelay(2);
- junk = channel->data;
- udelay(2);
- if (ioc_icontrol)
- junk = ioc_icontrol->istat0;
- junk = channel->data;
- udelay(2);
- if (ioc_icontrol)
- junk = ioc_icontrol->istat0;
- junk = channel->data;
- udelay(2);
- if (ioc_icontrol)
- junk = ioc_icontrol->istat0;
- }
- #if 0
- #define ZS_CLEARERR(channel) (channel->control = ERR_RES)
- #define ZS_CLEARFIFO(channel) do { volatile unsigned char garbage;
- garbage = channel->data;
- udelay(2);
- garbage = channel->data;
- udelay(2);
- garbage = channel->data;
- udelay(2); } while(0)
- #endif
- #endif /* !(_SPARC_SERIAL_H) */