z85230.h
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上传日期:2013-04-10
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- /*
- * Description of Z8530 Z85C30 and Z85230 communications chips
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 Alan Cox <alan@redhat.com>
- */
- #ifndef _Z8530_H
- #define _Z8530_H
- #include <linux/tty.h>
- /* 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 RPRIME 16 /* Indicate a prime register access on 230 */
- #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 PRIME 1 /* R5' etc register access (Z85C30/230 only) */
- #define ZCIE 2 /* Zero count IE */
- #define FIFOE 4 /* Z85230 only */
- #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_HUNT 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) */
- /*
- * Interrupt handling functions for this SCC
- */
- struct z8530_channel;
-
- struct z8530_irqhandler
- {
- void (*rx)(struct z8530_channel *);
- void (*tx)(struct z8530_channel *);
- void (*status)(struct z8530_channel *);
- };
- /*
- * A channel of the Z8530
- */
- struct z8530_channel
- {
- struct z8530_irqhandler *irqs; /* IRQ handlers */
- /*
- * Synchronous
- */
- u16 count; /* Buyes received */
- u16 max; /* Most we can receive this frame */
- u16 mtu; /* MTU of the device */
- u8 *dptr; /* Pointer into rx buffer */
- struct sk_buff *skb; /* Buffer dptr points into */
- struct sk_buff *skb2; /* Pending buffer */
- u8 status; /* Current DCD */
- u8 dcdcheck; /* which bit to check for line */
- u8 sync; /* Set if in sync mode */
- u8 regs[32]; /* Register map for the chip */
- u8 pendregs[32]; /* Pending register values */
-
- struct sk_buff *tx_skb; /* Buffer being transmitted */
- struct sk_buff *tx_next_skb; /* Next transmit buffer */
- u8 *tx_ptr; /* Byte pointer into the buffer */
- u8 *tx_next_ptr; /* Next pointer to use */
- u8 *tx_dma_buf[2]; /* TX flip buffers for DMA */
- u8 tx_dma_used; /* Flip buffer usage toggler */
- u16 txcount; /* Count of bytes to transmit */
-
- void (*rx_function)(struct z8530_channel *, struct sk_buff *);
-
- /*
- * Sync DMA
- */
-
- u8 rxdma; /* DMA channels */
- u8 txdma;
- u8 rxdma_on; /* DMA active if flag set */
- u8 txdma_on;
- u8 dma_num; /* Buffer we are DMAing into */
- u8 dma_ready; /* Is the other buffer free */
- u8 dma_tx; /* TX is to use DMA */
- u8 *rx_buf[2]; /* The flip buffers */
-
- /*
- * System
- */
-
- struct z8530_dev *dev; /* Z85230 chip instance we are from */
- unsigned long ctrlio; /* I/O ports */
- unsigned long dataio;
- /*
- * For PC we encode this way.
- */
- #define Z8530_PORT_SLEEP 0x80000000
- #define Z8530_PORT_OF(x) ((x)&0xFFFF)
- u32 rx_overrun; /* Overruns - not done yet */
- u32 rx_crc_err;
- /*
- * Bound device pointers
- */
- void *private; /* For our owner */
- struct net_device *netdevice; /* Network layer device */
- struct net_device_stats stats; /* Network layer statistics */
- /*
- * Async features
- */
- struct tty_struct *tty; /* Attached terminal */
- int line; /* Minor number */
- struct termios normal_termios; /* Terminal settings */
- struct termios callout_termios;
- wait_queue_head_t open_wait; /* Tasks waiting to open */
- wait_queue_head_t close_wait; /* and for close to end */
- unsigned long event; /* Pending events */
- int fdcount; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- int x_char; /* XON/XOF char */
- unsigned char *xmit_buf; /* Transmit pointer */
- int xmit_head; /* Transmit ring */
- int xmit_tail;
- int xmit_cnt;
- int flags;
- int timeout;
- int xmit_fifo_size; /* Transmit FIFO info */
- int close_delay; /* Do we wait for drain on close ? */
- unsigned short closing_wait;
- /* 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;
- int magic;
- int baud_base; /* Baud parameters */
- int custom_divisor;
- unsigned char tx_active; /* character is being xmitted */
- unsigned char tx_stopped; /* output is suspended */
- spinlock_t *lock; /* Devicr lock */
- };
- /*
- * Each Z853x0 device.
- */
-
- struct z8530_dev
- {
- char *name; /* Device instance name */
- struct z8530_channel chanA; /* SCC channel A */
- struct z8530_channel chanB; /* SCC channel B */
- int type;
- #define Z8530 0 /* NMOS dinosaur */
- #define Z85C30 1 /* CMOS - better */
- #define Z85230 2 /* CMOS with real FIFO */
- int irq; /* Interrupt for the device */
- int active; /* Soft interrupt enable - the Mac doesn't
- always have a hard disable on its 8530s... */
- spinlock_t lock;
- };
- /*
- * Functions
- */
-
- extern u8 z8530_dead_port[];
- extern u8 z8530_hdlc_kilostream_85230[];
- extern u8 z8530_hdlc_kilostream[];
- extern void z8530_interrupt(int, void *, struct pt_regs *);
- extern void z8530_describe(struct z8530_dev *, char *mapping, unsigned long io);
- extern int z8530_init(struct z8530_dev *);
- extern int z8530_shutdown(struct z8530_dev *);
- extern int z8530_sync_open(struct net_device *, struct z8530_channel *);
- extern int z8530_sync_close(struct net_device *, struct z8530_channel *);
- extern int z8530_sync_dma_open(struct net_device *, struct z8530_channel *);
- extern int z8530_sync_dma_close(struct net_device *, struct z8530_channel *);
- extern int z8530_sync_txdma_open(struct net_device *, struct z8530_channel *);
- extern int z8530_sync_txdma_close(struct net_device *, struct z8530_channel *);
- extern int z8530_channel_load(struct z8530_channel *, u8 *);
- extern int z8530_queue_xmit(struct z8530_channel *c, struct sk_buff *skb);
- extern struct net_device_stats *z8530_get_stats(struct z8530_channel *c);
- extern void z8530_null_rx(struct z8530_channel *c, struct sk_buff *skb);
- /*
- * Standard interrupt vector sets
- */
-
- extern struct z8530_irqhandler z8530_sync, z8530_async, z8530_nop;
- /*
- * Asynchronous Interfacing
- */
- #define SERIAL_MAGIC 0x5301
- /*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
- #define SERIAL_XMIT_SIZE 4096
- #define WAKEUP_CHARS 256
- /*
- * Events are used to schedule things to happen at timer-interrupt
- * time, instead of at rs interrupt time.
- */
- #define RS_EVENT_WRITE_WAKEUP 0
- /* 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 */
- #endif /* !(_Z8530_H) */