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Diffstat (limited to '')
| -rw-r--r-- | drivers/net/wan/z85230.h | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/drivers/net/wan/z85230.h b/drivers/net/wan/z85230.h new file mode 100644 index 000000000..1081d171e --- /dev/null +++ b/drivers/net/wan/z85230.h @@ -0,0 +1,446 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Description of Z8530 Z85C30 and Z85230 communications chips + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1998 Alan Cox <alan@lxorguk.ukuu.org.uk> + */ + +#ifndef _Z8530_H +#define _Z8530_H + +#include <linux/tty.h> +#include <linux/interrupt.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 */ + + /* + * Async features + */ + + struct tty_struct *tty; /* Attached terminal */ + int line; /* Minor number */ + 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 */ + 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; /* Device 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[]; +irqreturn_t z8530_interrupt(int, void *); +void z8530_describe(struct z8530_dev *, char *mapping, unsigned long io); +int z8530_init(struct z8530_dev *); +int z8530_shutdown(struct z8530_dev *); +int z8530_sync_open(struct net_device *, struct z8530_channel *); +int z8530_sync_close(struct net_device *, struct z8530_channel *); +int z8530_sync_dma_open(struct net_device *, struct z8530_channel *); +int z8530_sync_dma_close(struct net_device *, struct z8530_channel *); +int z8530_sync_txdma_open(struct net_device *, struct z8530_channel *); +int z8530_sync_txdma_close(struct net_device *, struct z8530_channel *); +int z8530_channel_load(struct z8530_channel *, u8 *); +netdev_tx_t z8530_queue_xmit(struct z8530_channel *c, struct sk_buff *skb); +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 + */ + +/* + * 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) */ |