brintos

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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _SUNZILOG_H3#define _SUNZILOG_H4 5struct zilog_channel {6	volatile unsigned char control;7	volatile unsigned char __pad1;8	volatile unsigned char data;9	volatile unsigned char __pad2;10};11 12struct zilog_layout {13	struct zilog_channel channelB;14	struct zilog_channel channelA;15};16 17#define	NUM_ZSREGS	1718#define	R7p		16 /* Written as R7 with P15 bit 0 set */19 20/* Conversion routines to/from brg time constants from/to bits21 * per second.22 */23#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2))24#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2)25 26/* The Zilog register set */27 28#define	FLAG	0x7e29 30/* Write Register 0 */31#define	R0	0		/* Register selects */32#define	R1	133#define	R2	234#define	R3	335#define	R4	436#define	R5	537#define	R6	638#define	R7	739#define	R8	840#define	R9	941#define	R10	1042#define	R11	1143#define	R12	1244#define	R13	1345#define	R14	1446#define	R15	1547 48#define	NULLCODE	0	/* Null Code */49#define	POINT_HIGH	0x8	/* Select upper half of registers */50#define	RES_EXT_INT	0x10	/* Reset Ext. Status Interrupts */51#define	SEND_ABORT	0x18	/* HDLC Abort */52#define	RES_RxINT_FC	0x20	/* Reset RxINT on First Character */53#define	RES_Tx_P	0x28	/* Reset TxINT Pending */54#define	ERR_RES		0x30	/* Error Reset */55#define	RES_H_IUS	0x38	/* Reset highest IUS */56 57#define	RES_Rx_CRC	0x40	/* Reset Rx CRC Checker */58#define	RES_Tx_CRC	0x80	/* Reset Tx CRC Checker */59#define	RES_EOM_L	0xC0	/* Reset EOM latch */60 61/* Write Register 1 */62 63#define	EXT_INT_ENAB	0x1	/* Ext Int Enable */64#define	TxINT_ENAB	0x2	/* Tx Int Enable */65#define	PAR_SPEC	0x4	/* Parity is special condition */66 67#define	RxINT_DISAB	0	/* Rx Int Disable */68#define	RxINT_FCERR	0x8	/* Rx Int on First Character Only or Error */69#define	INT_ALL_Rx	0x10	/* Int on all Rx Characters or error */70#define	INT_ERR_Rx	0x18	/* Int on error only */71#define RxINT_MASK	0x1872 73#define	WT_RDY_RT	0x20	/* Wait/Ready on R/T */74#define	WT_FN_RDYFN	0x40	/* Wait/FN/Ready FN */75#define	WT_RDY_ENAB	0x80	/* Wait/Ready Enable */76 77/* Write Register #2 (Interrupt Vector) */78 79/* Write Register 3 */80 81#define	RxENAB  	0x1	/* Rx Enable */82#define	SYNC_L_INH	0x2	/* Sync Character Load Inhibit */83#define	ADD_SM		0x4	/* Address Search Mode (SDLC) */84#define	RxCRC_ENAB	0x8	/* Rx CRC Enable */85#define	ENT_HM		0x10	/* Enter Hunt Mode */86#define	AUTO_ENAB	0x20	/* Auto Enables */87#define	Rx5		0x0	/* Rx 5 Bits/Character */88#define	Rx7		0x40	/* Rx 7 Bits/Character */89#define	Rx6		0x80	/* Rx 6 Bits/Character */90#define	Rx8		0xc0	/* Rx 8 Bits/Character */91#define RxN_MASK	0xc092 93/* Write Register 4 */94 95#define	PAR_ENAB	0x1	/* Parity Enable */96#define	PAR_EVEN	0x2	/* Parity Even/Odd* */97 98#define	SYNC_ENAB	0	/* Sync Modes Enable */99#define	SB1		0x4	/* 1 stop bit/char */100#define	SB15		0x8	/* 1.5 stop bits/char */101#define	SB2		0xc	/* 2 stop bits/char */102 103#define	MONSYNC		0	/* 8 Bit Sync character */104#define	BISYNC		0x10	/* 16 bit sync character */105#define	SDLC		0x20	/* SDLC Mode (01111110 Sync Flag) */106#define	EXTSYNC		0x30	/* External Sync Mode */107 108#define	X1CLK		0x0	/* x1 clock mode */109#define	X16CLK		0x40	/* x16 clock mode */110#define	X32CLK		0x80	/* x32 clock mode */111#define	X64CLK		0xC0	/* x64 clock mode */112#define XCLK_MASK	0xC0113 114/* Write Register 5 */115 116#define	TxCRC_ENAB	0x1	/* Tx CRC Enable */117#define	RTS		0x2	/* RTS */118#define	SDLC_CRC	0x4	/* SDLC/CRC-16 */119#define	TxENAB		0x8	/* Tx Enable */120#define	SND_BRK		0x10	/* Send Break */121#define	Tx5		0x0	/* Tx 5 bits (or less)/character */122#define	Tx7		0x20	/* Tx 7 bits/character */123#define	Tx6		0x40	/* Tx 6 bits/character */124#define	Tx8		0x60	/* Tx 8 bits/character */125#define TxN_MASK	0x60126#define	DTR		0x80	/* DTR */127 128/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */129 130/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */131 132/* Write Register 7' (ESCC Only) */133#define	AUTO_TxFLAG	1	/* Automatic Tx SDLC Flag */134#define	AUTO_EOM_RST	2	/* Automatic EOM Reset */135#define	AUTOnRTS	4	/* Automatic /RTS pin deactivation */136#define	RxFIFO_LVL	8	/* Receive FIFO interrupt level */137#define	nDTRnREQ	0x10	/* /DTR/REQ timing */138#define	TxFIFO_LVL	0x20	/* Transmit FIFO interrupt level */139#define	EXT_RD_EN	0x40	/* Extended read register enable */140 141/* Write Register 8 (transmit buffer) */142 143/* Write Register 9 (Master interrupt control) */144#define	VIS	1	/* Vector Includes Status */145#define	NV	2	/* No Vector */146#define	DLC	4	/* Disable Lower Chain */147#define	MIE	8	/* Master Interrupt Enable */148#define	STATHI	0x10	/* Status high */149#define	SWIACK  0x20    /* Software Interrupt Ack (not on NMOS) */150#define	NORESET	0	/* No reset on write to R9 */151#define	CHRB	0x40	/* Reset channel B */152#define	CHRA	0x80	/* Reset channel A */153#define	FHWRES	0xc0	/* Force hardware reset */154 155/* Write Register 10 (misc control bits) */156#define	BIT6	1	/* 6 bit/8bit sync */157#define	LOOPMODE 2	/* SDLC Loop mode */158#define	ABUNDER	4	/* Abort/flag on SDLC xmit underrun */159#define	MARKIDLE 8	/* Mark/flag on idle */160#define	GAOP	0x10	/* Go active on poll */161#define	NRZ	0	/* NRZ mode */162#define	NRZI	0x20	/* NRZI mode */163#define	FM1	0x40	/* FM1 (transition = 1) */164#define	FM0	0x60	/* FM0 (transition = 0) */165#define	CRCPS	0x80	/* CRC Preset I/O */166 167/* Write Register 11 (Clock Mode control) */168#define	TRxCXT	0	/* TRxC = Xtal output */169#define	TRxCTC	1	/* TRxC = Transmit clock */170#define	TRxCBR	2	/* TRxC = BR Generator Output */171#define	TRxCDP	3	/* TRxC = DPLL output */172#define	TRxCOI	4	/* TRxC O/I */173#define	TCRTxCP	0	/* Transmit clock = RTxC pin */174#define	TCTRxCP	8	/* Transmit clock = TRxC pin */175#define	TCBR	0x10	/* Transmit clock = BR Generator output */176#define	TCDPLL	0x18	/* Transmit clock = DPLL output */177#define	RCRTxCP	0	/* Receive clock = RTxC pin */178#define	RCTRxCP	0x20	/* Receive clock = TRxC pin */179#define	RCBR	0x40	/* Receive clock = BR Generator output */180#define	RCDPLL	0x60	/* Receive clock = DPLL output */181#define	RTxCX	0x80	/* RTxC Xtal/No Xtal */182 183/* Write Register 12 (lower byte of baud rate generator time constant) */184 185/* Write Register 13 (upper byte of baud rate generator time constant) */186 187/* Write Register 14 (Misc control bits) */188#define	BRENAB 	1	/* Baud rate generator enable */189#define	BRSRC	2	/* Baud rate generator source */190#define	DTRREQ	4	/* DTR/Request function */191#define	AUTOECHO 8	/* Auto Echo */192#define	LOOPBAK	0x10	/* Local loopback */193#define	SEARCH	0x20	/* Enter search mode */194#define	RMC	0x40	/* Reset missing clock */195#define	DISDPLL	0x60	/* Disable DPLL */196#define	SSBR	0x80	/* Set DPLL source = BR generator */197#define	SSRTxC	0xa0	/* Set DPLL source = RTxC */198#define	SFMM	0xc0	/* Set FM mode */199#define	SNRZI	0xe0	/* Set NRZI mode */200 201/* Write Register 15 (external/status interrupt control) */202#define	WR7pEN	1	/* WR7' Enable (ESCC only) */203#define	ZCIE	2	/* Zero count IE */204#define	FIFOEN	4	/* FIFO Enable (ESCC only) */205#define	DCDIE	8	/* DCD IE */206#define	SYNCIE	0x10	/* Sync/hunt IE */207#define	CTSIE	0x20	/* CTS IE */208#define	TxUIE	0x40	/* Tx Underrun/EOM IE */209#define	BRKIE	0x80	/* Break/Abort IE */210 211 212/* Read Register 0 */213#define	Rx_CH_AV	0x1	/* Rx Character Available */214#define	ZCOUNT		0x2	/* Zero count */215#define	Tx_BUF_EMP	0x4	/* Tx Buffer empty */216#define	DCD		0x8	/* DCD */217#define	SYNC		0x10	/* Sync/hunt */218#define	CTS		0x20	/* CTS */219#define	TxEOM		0x40	/* Tx underrun */220#define	BRK_ABRT	0x80	/* Break/Abort */221 222/* Read Register 1 */223#define	ALL_SNT		0x1	/* All sent */224/* Residue Data for 8 Rx bits/char programmed */225#define	RES3		0x8	/* 0/3 */226#define	RES4		0x4	/* 0/4 */227#define	RES5		0xc	/* 0/5 */228#define	RES6		0x2	/* 0/6 */229#define	RES7		0xa	/* 0/7 */230#define	RES8		0x6	/* 0/8 */231#define	RES18		0xe	/* 1/8 */232#define	RES28		0x0	/* 2/8 */233/* Special Rx Condition Interrupts */234#define	PAR_ERR		0x10	/* Parity error */235#define	Rx_OVR		0x20	/* Rx Overrun Error */236#define	CRC_ERR		0x40	/* CRC/Framing Error */237#define	END_FR		0x80	/* End of Frame (SDLC) */238 239/* Read Register 2 (channel b only) - Interrupt vector */240#define CHB_Tx_EMPTY	0x00241#define CHB_EXT_STAT	0x02242#define CHB_Rx_AVAIL	0x04243#define CHB_SPECIAL	0x06244#define CHA_Tx_EMPTY	0x08245#define CHA_EXT_STAT	0x0a246#define CHA_Rx_AVAIL	0x0c247#define CHA_SPECIAL	0x0e248#define STATUS_MASK	0x0e249 250/* Read Register 3 (interrupt pending register) ch a only */251#define	CHBEXT	0x1		/* Channel B Ext/Stat IP */252#define	CHBTxIP	0x2		/* Channel B Tx IP */253#define	CHBRxIP	0x4		/* Channel B Rx IP */254#define	CHAEXT	0x8		/* Channel A Ext/Stat IP */255#define	CHATxIP	0x10		/* Channel A Tx IP */256#define	CHARxIP	0x20		/* Channel A Rx IP */257 258/* Read Register 6 (LSB frame byte count [Not on NMOS]) */259 260/* Read Register 7 (MSB frame byte count and FIFO status [Not on NMOS]) */261 262/* Read Register 8 (receive data register) */263 264/* Read Register 10  (misc status bits) */265#define	ONLOOP	2		/* On loop */266#define	LOOPSEND 0x10		/* Loop sending */267#define	CLK2MIS	0x40		/* Two clocks missing */268#define	CLK1MIS	0x80		/* One clock missing */269 270/* Read Register 12 (lower byte of baud rate generator constant) */271 272/* Read Register 13 (upper byte of baud rate generator constant) */273 274/* Read Register 15 (value of WR 15) */275 276/* Misc macros */277#define ZS_CLEARERR(channel)    do { sbus_writeb(ERR_RES, &channel->control); \278				     udelay(5); } while(0)279 280#define ZS_CLEARSTAT(channel)   do { sbus_writeb(RES_EXT_INT, &channel->control); \281				     udelay(5); } while(0)282 283#define ZS_CLEARFIFO(channel)   do { sbus_readb(&channel->data); \284				     udelay(2); \285				     sbus_readb(&channel->data); \286				     udelay(2); \287				     sbus_readb(&channel->data); \288				     udelay(2); } while(0)289 290#endif /* _SUNZILOG_H */291