[apple/xnu.git] / osfmk / ppc / POWERMAC / scc_8530.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/*
 * @APPLE_FREE_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	File: scc_8530.h
 * 	Author: Alessandro Forin, Carnegie Mellon University
 *	Date:	6/91
 *
 *	Definitions for the Zilog Z8530 SCC serial line chip
 */

#ifndef	_SCC_8530_H_
#define	_SCC_8530_H_

/*
 * Register map, needs definition of the alignment
 * used on the specific machine.
 * #define the 'scc_register_t' data type before
 * including this header file.  For restrictions on
 * access modes define the set/get_datum macros.
 * We provide defaults ifnot.
 */


#define	SCC_CHANNEL_A	1
#define	SCC_CHANNEL_B	0

#define	SCC_MODEM	SCC_CHANNEL_A
#define	SCC_PRINTER	SCC_CHANNEL_B

#define	SCC_DATA_OFFSET	4

typedef unsigned char *scc_regmap_t;

extern void	powermac_scc_set_datum(scc_regmap_t regs, unsigned int offset, unsigned char value);
extern unsigned char powermac_scc_get_datum(scc_regmap_t regs, unsigned int offset);

#define scc_set_datum(regs, d, v)	powermac_scc_set_datum(regs, (d), (v))
#define	scc_get_datum(regs, d,v)	(v)  = powermac_scc_get_datum(regs, (d));

#define	scc_init_reg(regs,chan)		{ \
		char tmp; \
		scc_get_datum(regs, ((chan)<<1),tmp); \
		scc_get_datum(regs, ((chan)<<1),tmp); \
	}

#define	scc_read_reg(regs,chan,reg,val)	{ \
		scc_set_datum(regs, ((chan)<<1),reg); \
		scc_get_datum(regs, ((chan)<<1),val); \
	}

#define	scc_read_reg_zero(regs,chan,val)	{ \
		scc_get_datum(regs, ((chan)<<1),val); \
	}

#define	scc_write_reg(regs,chan,reg,val)	{ \
		scc_set_datum(regs, ((chan)<<1),reg); \
		scc_set_datum(regs, ((chan)<<1),val); \
	}

#define	scc_write_reg_zero(regs,chan,val) { \
		scc_set_datum(regs, ((chan)<<1),val); \
	}

#define	scc_read_data(regs,chan,val)	{ \
		scc_get_datum(regs, ((chan)<<1)+SCC_DATA_OFFSET,val); \
	}

#define	scc_write_data(regs,chan,val) { \
		scc_set_datum(regs, ((chan)<<1)+SCC_DATA_OFFSET,val); \
	}


/*
 * Addressable registers
 */

#define	SCC_RR0		0	/* status register */
#define	SCC_RR1		1	/* special receive conditions */
#define	SCC_RR2		2	/* (modified) interrupt vector */
#define	SCC_RR3		3	/* interrupts pending (cha A only) */
#define	SCC_RR8		8	/* recv buffer (alias for data) */
#define	SCC_RR10	10	/* sdlc status */
#define	SCC_RR12	12	/* BRG constant, low part */
#define	SCC_RR13	13	/* BRG constant, high part */
#define	SCC_RR15	15	/* interrupts currently enabled */

#define	SCC_WR0		0	/* reg select, and commands */
#define	SCC_WR1		1	/* interrupt and DMA enables */
#define	SCC_WR2		2	/* interrupt vector */
#define	SCC_WR3		3	/* receiver params and enables */
#define	SCC_WR4		4	/* clock/char/parity params */
#define	SCC_WR5		5	/* xmit params and enables */
#define	SCC_WR6		6	/* synchr SYNCH/address */
#define	SCC_WR7		7	/* synchr SYNCH/flag */
#define	SCC_WR8		8	/* xmit buffer (alias for data) */
#define	SCC_WR9		9	/* vectoring and resets */
#define	SCC_WR10	10	/* synchr params */
#define	SCC_WR11	11	/* clocking definitions */
#define	SCC_WR12	12	/* BRG constant, low part */
#define	SCC_WR13	13	/* BRG constant, high part */
#define	SCC_WR14	14	/* BRG enables and commands */
#define	SCC_WR15	15	/* interrupt enables */

/*
 * Read registers defines
 */

#define	SCC_RR0_BREAK		0x80	/* break detected (rings twice), or */
#define	SCC_RR0_ABORT		0x80	/* abort (synchr) */
#define	SCC_RR0_TX_UNDERRUN	0x40	/* xmit buffer empty/end of message */
#define	SCC_RR0_CTS		0x20	/* clear-to-send pin active (sampled
					   only on intr and after RESI cmd */
#define	SCC_RR0_SYNCH		0x10	/* SYNCH found/still hunting */
#define	SCC_RR0_DCD		0x08	/* carrier-detect (same as CTS) */
#define	SCC_RR0_TX_EMPTY	0x04	/* xmit buffer empty */
#define	SCC_RR0_ZERO_COUNT	0x02	/* ? */
#define	SCC_RR0_RX_AVAIL	0x01	/* recv fifo not empty */

#define	SCC_RR1_EOF		0x80	/* end-of-frame, SDLC mode */
#define	SCC_RR1_CRC_ERR		0x40	/* incorrect CRC or.. */
#define	SCC_RR1_FRAME_ERR	0x40	/* ..bad frame */
#define	SCC_RR1_RX_OVERRUN	0x20	/* rcv fifo overflow */
#define	SCC_RR1_PARITY_ERR	0x10	/* incorrect parity in data */
#define	SCC_RR1_RESIDUE0	0x08
#define	SCC_RR1_RESIDUE1	0x04
#define	SCC_RR1_RESIDUE2	0x02
#define	SCC_RR1_ALL_SENT	0x01

/* RR2 contains the interrupt vector unmodified (channel A) or
   modified as follows (channel B, if vector-include-status) */

#define	SCC_RR2_STATUS(val)	((val)&0xe)	/* 11/7/95 used to be 0xf */

#define	SCC_RR2_B_XMIT_DONE	0x0
#define	SCC_RR2_B_EXT_STATUS	0x2
#define	SCC_RR2_B_RECV_DONE	0x4
#define	SCC_RR2_B_RECV_SPECIAL	0x6
#define	SCC_RR2_A_XMIT_DONE	0x8
#define	SCC_RR2_A_EXT_STATUS	0xa
#define	SCC_RR2_A_RECV_DONE	0xc
#define	SCC_RR2_A_RECV_SPECIAL	0xe

/* Interrupts pending, to be read from channel A only (B raz) */
#define	SCC_RR3_zero		0xc0
#define	SCC_RR3_RX_IP_A		0x20
#define	SCC_RR3_TX_IP_A		0x10
#define	SCC_RR3_EXT_IP_A	0x08
#define	SCC_RR3_RX_IP_B		0x04
#define	SCC_RR3_TX_IP_B		0x02
#define	SCC_RR3_EXT_IP_B	0x01

/* RR8 is the receive data buffer, a 3 deep FIFO */
#define	SCC_RECV_BUFFER		SCC_RR8
#define	SCC_RECV_FIFO_DEEP	3

#define	SCC_RR10_1CLKS		0x80
#define	SCC_RR10_2CLKS		0x40
#define	SCC_RR10_zero		0x2d
#define	SCC_RR10_LOOP_SND	0x10
#define	SCC_RR10_ON_LOOP	0x02

/* RR12/RR13 hold the timing base, upper byte in RR13 */

#define	scc_get_timing_base(scc,chan,val)	{ \
		register char	tmp;	\
		scc_read_reg(scc,chan,SCC_RR12,val);\
		scc_read_reg(scc,chan,SCC_RR13,tmp);\
		(val) = ((val)<<8)|(tmp&0xff);\
	}

#define	SCC_RR15_BREAK_IE	0x80
#define	SCC_RR15_TX_UNDERRUN_IE	0x40
#define	SCC_RR15_CTS_IE		0x20
#define	SCC_RR15_SYNCH_IE	0x10
#define	SCC_RR15_DCD_IE		0x08
#define	SCC_RR15_zero		0x05
#define	SCC_RR15_ZERO_COUNT_IE	0x02


/*
 * Write registers defines
 */

/* WR0 is used for commands too */
#define	SCC_RESET_TXURUN_LATCH	0xc0
#define	SCC_RESET_TX_CRC	0x80
#define	SCC_RESET_RX_CRC	0x40
#define	SCC_RESET_HIGHEST_IUS	0x38	/* channel A only */
#define	SCC_RESET_ERROR		0x30
#define	SCC_RESET_TX_IP		0x28
#define	SCC_IE_NEXT_CHAR	0x20
#define	SCC_SEND_SDLC_ABORT	0x18
#define	SCC_RESET_EXT_IP	0x10

#define	SCC_WR1_DMA_ENABLE	0x80	/* dma control */
#define	SCC_WR1_DMA_MODE	0x40	/* drive ~req for DMA controller */
#define	SCC_WR1_DMA_RECV_DATA	0x20	/* from wire to host memory */
					/* interrupt enable/conditions */
#define	SCC_WR1_RXI_SPECIAL_O	0x18	/* on special only */
#define	SCC_WR1_RXI_ALL_CHAR	0x10	/* on each char, or special */
#define	SCC_WR1_RXI_FIRST_CHAR	0x08	/* on first char, or special */
#define	SCC_WR1_RXI_DISABLE	0x00	/* never on recv */
#define	SCC_WR1_PARITY_IE	0x04	/* on parity errors */
#define	SCC_WR1_TX_IE		0x02
#define	SCC_WR1_EXT_IE		0x01

/* WR2 is common and contains the interrupt vector (high nibble) */

#define	SCC_WR3_RX_8_BITS	0xc0
#define	SCC_WR3_RX_6_BITS	0x80
#define	SCC_WR3_RX_7_BITS	0x40
#define	SCC_WR3_RX_5_BITS	0x00
#define	SCC_WR3_AUTO_ENABLE	0x20
#define	SCC_WR3_HUNT_MODE	0x10
#define	SCC_WR3_RX_CRC_ENABLE	0x08
#define	SCC_WR3_SDLC_SRCH	0x04
#define	SCC_WR3_INHIBIT_SYNCH	0x02
#define	SCC_WR3_RX_ENABLE	0x01

/* Should be re-written after reset */
#define	SCC_WR4_CLK_x64		0xc0	/* clock divide factor */
#define	SCC_WR4_CLK_x32		0x80
#define	SCC_WR4_CLK_x16		0x40
#define	SCC_WR4_CLK_x1		0x00
#define	SCC_WR4_EXT_SYNCH_MODE	0x30	/* synch modes */
#define	SCC_WR4_SDLC_MODE	0x20
#define	SCC_WR4_16BIT_SYNCH	0x10
#define	SCC_WR4_8BIT_SYNCH	0x00
#define	SCC_WR4_2_STOP		0x0c	/* asynch modes */
#define	SCC_WR4_1_5_STOP	0x08
#define	SCC_WR4_1_STOP		0x04
#define	SCC_WR4_SYNCH_MODE	0x00
#define	SCC_WR4_EVEN_PARITY	0x02
#define	SCC_WR4_PARITY_ENABLE	0x01

#define	SCC_WR5_DTR		0x80	/* drive DTR pin */
#define	SCC_WR5_TX_8_BITS	0x60
#define	SCC_WR5_TX_6_BITS	0x40
#define	SCC_WR5_TX_7_BITS	0x20
#define	SCC_WR5_TX_5_BITS	0x00
#define	SCC_WR5_SEND_BREAK	0x10
#define	SCC_WR5_TX_ENABLE	0x08
#define	SCC_WR5_CRC_16		0x04	/* CRC if non zero, .. */
#define	SCC_WR5_SDLC		0x00	/* ..SDLC otherwise  */
#define	SCC_WR5_RTS		0x02	/* drive RTS pin */
#define	SCC_WR5_TX_CRC_ENABLE	0x01

/* Registers WR6 and WR7 are for synch modes data, with among other things: */

#define	SCC_WR6_BISYNCH_12	0x0f
#define	SCC_WR6_SDLC_RANGE_MASK	0x0f
#define	SCC_WR7_SDLC_FLAG	0x7e

/* Register WR7' (prime) controls some ESCC features */
#define SCC_WR7P_RX_FIFO	0x08	/* Enable interrupt on FIFO 1/2 full */

/* WR8 is the transmit data buffer (no FIFO) */
#define	SCC_XMT_BUFFER		SCC_WR8

#define	SCC_WR9_HW_RESET	0xc0	/* force hardware reset */
#define	SCC_WR9_RESET_CHA_A	0x80
#define	SCC_WR9_RESET_CHA_B	0x40
#define	SCC_WR9_NON_VECTORED	0x20	/* mbz for Zilog chip */
#define	SCC_WR9_STATUS_HIGH	0x10
#define	SCC_WR9_MASTER_IE	0x08
#define	SCC_WR9_DLC		0x04	/* disable-lower-chain */
#define	SCC_WR9_NV		0x02	/* no vector */
#define	SCC_WR9_VIS		0x01	/* vector-includes-status */

#define	SCC_WR10_CRC_PRESET	0x80
#define	SCC_WR10_FM0		0x60
#define	SCC_WR10_FM1		0x40
#define	SCC_WR10_NRZI		0x20
#define	SCC_WR10_NRZ		0x00
#define	SCC_WR10_ACTIVE_ON_POLL	0x10
#define	SCC_WR10_MARK_IDLE	0x08	/* flag if zero */
#define	SCC_WR10_ABORT_ON_URUN	0x04	/* flag if zero */
#define	SCC_WR10_LOOP_MODE	0x02
#define	SCC_WR10_6BIT_SYNCH	0x01
#define	SCC_WR10_8BIT_SYNCH	0x00

#define	SCC_WR11_RTxC_XTAL	0x80	/* RTxC pin is input (ext oscill) */
#define	SCC_WR11_RCLK_DPLL	0x60	/* clock received data on dpll */
#define	SCC_WR11_RCLK_BAUDR	0x40	/* .. on BRG */
#define	SCC_WR11_RCLK_TRc_PIN	0x20	/* .. on TRxC pin */
#define	SCC_WR11_RCLK_RTc_PIN	0x00	/* .. on RTxC pin */
#define	SCC_WR11_XTLK_DPLL	0x18
#define	SCC_WR11_XTLK_BAUDR	0x10
#define	SCC_WR11_XTLK_TRc_PIN	0x08
#define	SCC_WR11_XTLK_RTc_PIN	0x00
#define	SCC_WR11_TRc_OUT	0x04	/* drive TRxC pin as output from..*/
#define	SCC_WR11_TRcOUT_DPLL	0x03	/* .. the dpll */
#define	SCC_WR11_TRcOUT_BAUDR	0x02	/* .. the BRG */
#define	SCC_WR11_TRcOUT_XMTCLK	0x01	/* .. the xmit clock */
#define	SCC_WR11_TRcOUT_XTAL	0x00	/* .. the external oscillator */

/* WR12/WR13 are for timing base preset */
#define	scc_set_timing_base(scc,chan,val)	{ \
		scc_write_reg(scc,chan,SCC_RR12,val);\
		scc_write_reg(scc,chan,SCC_RR13,(val)>>8);\
	}

/* More commands in this register */
#define	SCC_WR14_NRZI_MODE	0xe0	/* synch modulations */
#define	SCC_WR14_FM_MODE	0xc0
#define	SCC_WR14_RTc_SOURCE	0xa0	/* clock is from pin .. */
#define	SCC_WR14_BAUDR_SOURCE	0x80	/* .. or internal BRG */
#define	SCC_WR14_DISABLE_DPLL	0x60
#define	SCC_WR14_RESET_CLKMISS	0x40
#define	SCC_WR14_SEARCH_MODE	0x20
/* ..and more bitsy */
#define	SCC_WR14_LOCAL_LOOPB	0x10
#define	SCC_WR14_AUTO_ECHO	0x08
#define	SCC_WR14_DTR_REQUEST	0x04
#define	SCC_WR14_BAUDR_SRC	0x02
#define	SCC_WR14_BAUDR_ENABLE	0x01

#define	SCC_WR15_BREAK_IE	0x80
#define	SCC_WR15_TX_UNDERRUN_IE	0x40
#define	SCC_WR15_CTS_IE		0x20
#define	SCC_WR15_SYNCHUNT_IE	0x10
#define	SCC_WR15_DCD_IE		0x08
#define	SCC_WR15_zero		0x05
#define	SCC_WR15_ZERO_COUNT_IE	0x02
#define SCC_WR15_ENABLE_ESCC	0x01	/* Enable some ESCC registers */

#define	NSCC_LINE		2	/* How many lines are support per 8530 */
/*
 * Driver status
 */

#define	SCC_FLAGS_DMA_PAUSED	0x00001		/* DMA has been paused because of XON/XOFF */
#define	SCC_FLAGS_DMA_TX_BUSY	0x00002		/* On going DMA operation.. */

struct scc_softreg {
	unsigned char	wr1;
	unsigned char	wr4;
	unsigned char	wr5;
	unsigned char	wr14;

	unsigned long	speed;
	unsigned long	flags;
	unsigned long	dma_flags;
};


struct scc_softc {
	scc_regmap_t		regs;
	struct scc_dma_ops	*dma_ops;

	/* software copy of some write regs, for reg |= */
	struct scc_softreg softr[NSCC_LINE];

	int		flags;
	int		modem[NSCC_LINE]; /* Mach modem bits (TM_DTR etc). */
	int		dcd_timer[NSCC_LINE];
	int		dma_initted;

	char		polling_mode;
	char		probed_once;

	boolean_t		full_modem;
};

#define DCD_TIMEOUT 4

typedef struct scc_softc *scc_softc_t;
extern struct scc_softc		scc_softc[];

#endif	/*_SCC_8530_H_*/
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* @OSF_COPYRIGHT@
	24	*/
	25	/*
	26	* @APPLE_FREE_COPYRIGHT@
	27	*/
	28	/*
	29	* Mach Operating System
	30	* Copyright (c) 1991,1990,1989 Carnegie Mellon University
	31	* All Rights Reserved.
	32	*
	33	* Permission to use, copy, modify and distribute this software and its
	34	* documentation is hereby granted, provided that both the copyright
	35	* notice and this permission notice appear in all copies of the
	36	* software, derivative works or modified versions, and any portions
	37	* thereof, and that both notices appear in supporting documentation.
	38	*
	39	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	40	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	41	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	42	*
	43	* Carnegie Mellon requests users of this software to return to
	44	*
	45	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	46	* School of Computer Science
	47	* Carnegie Mellon University
	48	* Pittsburgh PA 15213-3890
	49	*
	50	* any improvements or extensions that they make and grant Carnegie Mellon
	51	* the rights to redistribute these changes.
	52	*/
	53	/*
	54	*/
	55	/*
	56	* File: scc_8530.h
	57	* Author: Alessandro Forin, Carnegie Mellon University
	58	* Date: 6/91
	59	*
	60	* Definitions for the Zilog Z8530 SCC serial line chip
	61	*/
	62
	63	#ifndef _SCC_8530_H_
	64	#define _SCC_8530_H_
65
66	/*
67	* Register map, needs definition of the alignment
68	* used on the specific machine.
69	* #define the 'scc_register_t' data type before
70	* including this header file. For restrictions on
71	* access modes define the set/get_datum macros.
72	* We provide defaults ifnot.
73	*/
74
75
76	#define SCC_CHANNEL_A 1
77	#define SCC_CHANNEL_B 0
78
79	#define SCC_MODEM SCC_CHANNEL_A
80	#define SCC_PRINTER SCC_CHANNEL_B
81
82	#define SCC_DATA_OFFSET 4
83
84	typedef unsigned char *scc_regmap_t;
85
86	extern void powermac_scc_set_datum(scc_regmap_t regs, unsigned int offset, unsigned char value);
87	extern unsigned char powermac_scc_get_datum(scc_regmap_t regs, unsigned int offset);
88
89	#define scc_set_datum(regs, d, v) powermac_scc_set_datum(regs, (d), (v))
90	#define scc_get_datum(regs, d,v) (v) = powermac_scc_get_datum(regs, (d));
91
92	#define scc_init_reg(regs,chan) { \
93	char tmp; \
94	scc_get_datum(regs, ((chan)<<1),tmp); \
95	scc_get_datum(regs, ((chan)<<1),tmp); \
96	}
97
98	#define scc_read_reg(regs,chan,reg,val) { \
99	scc_set_datum(regs, ((chan)<<1),reg); \
100	scc_get_datum(regs, ((chan)<<1),val); \
101	}
102
103	#define scc_read_reg_zero(regs,chan,val) { \
104	scc_get_datum(regs, ((chan)<<1),val); \
105	}
106
107	#define scc_write_reg(regs,chan,reg,val) { \
108	scc_set_datum(regs, ((chan)<<1),reg); \
109	scc_set_datum(regs, ((chan)<<1),val); \
110	}
111
112	#define scc_write_reg_zero(regs,chan,val) { \
113	scc_set_datum(regs, ((chan)<<1),val); \
114	}
115
116	#define scc_read_data(regs,chan,val) { \
117	scc_get_datum(regs, ((chan)<<1)+SCC_DATA_OFFSET,val); \
118	}
119
120	#define scc_write_data(regs,chan,val) { \
121	scc_set_datum(regs, ((chan)<<1)+SCC_DATA_OFFSET,val); \
122	}
123
124
125	/*
126	* Addressable registers
127	*/
128
129	#define SCC_RR0 0 /* status register */
130	#define SCC_RR1 1 /* special receive conditions */
131	#define SCC_RR2 2 /* (modified) interrupt vector */
132	#define SCC_RR3 3 /* interrupts pending (cha A only) */
133	#define SCC_RR8 8 /* recv buffer (alias for data) */
134	#define SCC_RR10 10 /* sdlc status */
135	#define SCC_RR12 12 /* BRG constant, low part */
136	#define SCC_RR13 13 /* BRG constant, high part */
137	#define SCC_RR15 15 /* interrupts currently enabled */
138
139	#define SCC_WR0 0 /* reg select, and commands */
140	#define SCC_WR1 1 /* interrupt and DMA enables */
141	#define SCC_WR2 2 /* interrupt vector */
142	#define SCC_WR3 3 /* receiver params and enables */
143	#define SCC_WR4 4 /* clock/char/parity params */
144	#define SCC_WR5 5 /* xmit params and enables */
145	#define SCC_WR6 6 /* synchr SYNCH/address */
146	#define SCC_WR7 7 /* synchr SYNCH/flag */
147	#define SCC_WR8 8 /* xmit buffer (alias for data) */
148	#define SCC_WR9 9 /* vectoring and resets */
149	#define SCC_WR10 10 /* synchr params */
150	#define SCC_WR11 11 /* clocking definitions */
151	#define SCC_WR12 12 /* BRG constant, low part */
152	#define SCC_WR13 13 /* BRG constant, high part */
153	#define SCC_WR14 14 /* BRG enables and commands */
154	#define SCC_WR15 15 /* interrupt enables */
155
156	/*
157	* Read registers defines
158	*/
159
160	#define SCC_RR0_BREAK 0x80 /* break detected (rings twice), or */
161	#define SCC_RR0_ABORT 0x80 /* abort (synchr) */
162	#define SCC_RR0_TX_UNDERRUN 0x40 /* xmit buffer empty/end of message */
163	#define SCC_RR0_CTS 0x20 /* clear-to-send pin active (sampled
164	only on intr and after RESI cmd */
165	#define SCC_RR0_SYNCH 0x10 /* SYNCH found/still hunting */
166	#define SCC_RR0_DCD 0x08 /* carrier-detect (same as CTS) */
167	#define SCC_RR0_TX_EMPTY 0x04 /* xmit buffer empty */
168	#define SCC_RR0_ZERO_COUNT 0x02 /* ? */
169	#define SCC_RR0_RX_AVAIL 0x01 /* recv fifo not empty */
170
171	#define SCC_RR1_EOF 0x80 /* end-of-frame, SDLC mode */
172	#define SCC_RR1_CRC_ERR 0x40 /* incorrect CRC or.. */
173	#define SCC_RR1_FRAME_ERR 0x40 /* ..bad frame */
174	#define SCC_RR1_RX_OVERRUN 0x20 /* rcv fifo overflow */
175	#define SCC_RR1_PARITY_ERR 0x10 /* incorrect parity in data */
176	#define SCC_RR1_RESIDUE0 0x08
177	#define SCC_RR1_RESIDUE1 0x04
178	#define SCC_RR1_RESIDUE2 0x02
179	#define SCC_RR1_ALL_SENT 0x01
180
181	/* RR2 contains the interrupt vector unmodified (channel A) or
182	modified as follows (channel B, if vector-include-status) */
183
184	#define SCC_RR2_STATUS(val) ((val)&0xe) /* 11/7/95 used to be 0xf */
185
186	#define SCC_RR2_B_XMIT_DONE 0x0
187	#define SCC_RR2_B_EXT_STATUS 0x2
188	#define SCC_RR2_B_RECV_DONE 0x4
189	#define SCC_RR2_B_RECV_SPECIAL 0x6
190	#define SCC_RR2_A_XMIT_DONE 0x8
191	#define SCC_RR2_A_EXT_STATUS 0xa
192	#define SCC_RR2_A_RECV_DONE 0xc
193	#define SCC_RR2_A_RECV_SPECIAL 0xe
194
195	/* Interrupts pending, to be read from channel A only (B raz) */
196	#define SCC_RR3_zero 0xc0
197	#define SCC_RR3_RX_IP_A 0x20
198	#define SCC_RR3_TX_IP_A 0x10
199	#define SCC_RR3_EXT_IP_A 0x08
200	#define SCC_RR3_RX_IP_B 0x04
201	#define SCC_RR3_TX_IP_B 0x02
202	#define SCC_RR3_EXT_IP_B 0x01
203
204	/* RR8 is the receive data buffer, a 3 deep FIFO */
205	#define SCC_RECV_BUFFER SCC_RR8
206	#define SCC_RECV_FIFO_DEEP 3
207
208	#define SCC_RR10_1CLKS 0x80
209	#define SCC_RR10_2CLKS 0x40
210	#define SCC_RR10_zero 0x2d
211	#define SCC_RR10_LOOP_SND 0x10
212	#define SCC_RR10_ON_LOOP 0x02
213
214	/* RR12/RR13 hold the timing base, upper byte in RR13 */
215
216	#define scc_get_timing_base(scc,chan,val) { \
217	register char tmp; \
218	scc_read_reg(scc,chan,SCC_RR12,val);\
219	scc_read_reg(scc,chan,SCC_RR13,tmp);\
220	(val) = ((val)<<8)\|(tmp&0xff);\
221	}
222
223	#define SCC_RR15_BREAK_IE 0x80
224	#define SCC_RR15_TX_UNDERRUN_IE 0x40
225	#define SCC_RR15_CTS_IE 0x20
226	#define SCC_RR15_SYNCH_IE 0x10
227	#define SCC_RR15_DCD_IE 0x08
228	#define SCC_RR15_zero 0x05
229	#define SCC_RR15_ZERO_COUNT_IE 0x02
230
231
232	/*
233	* Write registers defines
234	*/
235
236	/* WR0 is used for commands too */
237	#define SCC_RESET_TXURUN_LATCH 0xc0
238	#define SCC_RESET_TX_CRC 0x80
239	#define SCC_RESET_RX_CRC 0x40
240	#define SCC_RESET_HIGHEST_IUS 0x38 /* channel A only */
241	#define SCC_RESET_ERROR 0x30
242	#define SCC_RESET_TX_IP 0x28
243	#define SCC_IE_NEXT_CHAR 0x20
244	#define SCC_SEND_SDLC_ABORT 0x18
245	#define SCC_RESET_EXT_IP 0x10
246
247	#define SCC_WR1_DMA_ENABLE 0x80 /* dma control */
248	#define SCC_WR1_DMA_MODE 0x40 /* drive ~req for DMA controller */
249	#define SCC_WR1_DMA_RECV_DATA 0x20 /* from wire to host memory */
250	/* interrupt enable/conditions */
251	#define SCC_WR1_RXI_SPECIAL_O 0x18 /* on special only */
252	#define SCC_WR1_RXI_ALL_CHAR 0x10 /* on each char, or special */
253	#define SCC_WR1_RXI_FIRST_CHAR 0x08 /* on first char, or special */
254	#define SCC_WR1_RXI_DISABLE 0x00 /* never on recv */
255	#define SCC_WR1_PARITY_IE 0x04 /* on parity errors */
256	#define SCC_WR1_TX_IE 0x02
257	#define SCC_WR1_EXT_IE 0x01
258
259	/* WR2 is common and contains the interrupt vector (high nibble) */
260
261	#define SCC_WR3_RX_8_BITS 0xc0
262	#define SCC_WR3_RX_6_BITS 0x80
263	#define SCC_WR3_RX_7_BITS 0x40
264	#define SCC_WR3_RX_5_BITS 0x00
265	#define SCC_WR3_AUTO_ENABLE 0x20
266	#define SCC_WR3_HUNT_MODE 0x10
267	#define SCC_WR3_RX_CRC_ENABLE 0x08
268	#define SCC_WR3_SDLC_SRCH 0x04
269	#define SCC_WR3_INHIBIT_SYNCH 0x02
270	#define SCC_WR3_RX_ENABLE 0x01
271
272	/* Should be re-written after reset */
273	#define SCC_WR4_CLK_x64 0xc0 /* clock divide factor */
274	#define SCC_WR4_CLK_x32 0x80
275	#define SCC_WR4_CLK_x16 0x40
276	#define SCC_WR4_CLK_x1 0x00
277	#define SCC_WR4_EXT_SYNCH_MODE 0x30 /* synch modes */
278	#define SCC_WR4_SDLC_MODE 0x20
279	#define SCC_WR4_16BIT_SYNCH 0x10
280	#define SCC_WR4_8BIT_SYNCH 0x00
281	#define SCC_WR4_2_STOP 0x0c /* asynch modes */
282	#define SCC_WR4_1_5_STOP 0x08
283	#define SCC_WR4_1_STOP 0x04
284	#define SCC_WR4_SYNCH_MODE 0x00
285	#define SCC_WR4_EVEN_PARITY 0x02
286	#define SCC_WR4_PARITY_ENABLE 0x01
287
288	#define SCC_WR5_DTR 0x80 /* drive DTR pin */
289	#define SCC_WR5_TX_8_BITS 0x60
290	#define SCC_WR5_TX_6_BITS 0x40
291	#define SCC_WR5_TX_7_BITS 0x20
292	#define SCC_WR5_TX_5_BITS 0x00
293	#define SCC_WR5_SEND_BREAK 0x10
294	#define SCC_WR5_TX_ENABLE 0x08
295	#define SCC_WR5_CRC_16 0x04 /* CRC if non zero, .. */
296	#define SCC_WR5_SDLC 0x00 /* ..SDLC otherwise */
297	#define SCC_WR5_RTS 0x02 /* drive RTS pin */
298	#define SCC_WR5_TX_CRC_ENABLE 0x01
299
300	/* Registers WR6 and WR7 are for synch modes data, with among other things: */
301
302	#define SCC_WR6_BISYNCH_12 0x0f
303	#define SCC_WR6_SDLC_RANGE_MASK 0x0f
304	#define SCC_WR7_SDLC_FLAG 0x7e
305
306	/* Register WR7' (prime) controls some ESCC features */
307	#define SCC_WR7P_RX_FIFO 0x08 /* Enable interrupt on FIFO 1/2 full */
308
309	/* WR8 is the transmit data buffer (no FIFO) */
310	#define SCC_XMT_BUFFER SCC_WR8
311
312	#define SCC_WR9_HW_RESET 0xc0 /* force hardware reset */
313	#define SCC_WR9_RESET_CHA_A 0x80
314	#define SCC_WR9_RESET_CHA_B 0x40
315	#define SCC_WR9_NON_VECTORED 0x20 /* mbz for Zilog chip */
316	#define SCC_WR9_STATUS_HIGH 0x10
317	#define SCC_WR9_MASTER_IE 0x08
318	#define SCC_WR9_DLC 0x04 /* disable-lower-chain */
319	#define SCC_WR9_NV 0x02 /* no vector */
320	#define SCC_WR9_VIS 0x01 /* vector-includes-status */
321
322	#define SCC_WR10_CRC_PRESET 0x80
323	#define SCC_WR10_FM0 0x60
324	#define SCC_WR10_FM1 0x40
325	#define SCC_WR10_NRZI 0x20
326	#define SCC_WR10_NRZ 0x00
327	#define SCC_WR10_ACTIVE_ON_POLL 0x10
328	#define SCC_WR10_MARK_IDLE 0x08 /* flag if zero */
329	#define SCC_WR10_ABORT_ON_URUN 0x04 /* flag if zero */
330	#define SCC_WR10_LOOP_MODE 0x02
331	#define SCC_WR10_6BIT_SYNCH 0x01
332	#define SCC_WR10_8BIT_SYNCH 0x00
333
334	#define SCC_WR11_RTxC_XTAL 0x80 /* RTxC pin is input (ext oscill) */
335	#define SCC_WR11_RCLK_DPLL 0x60 /* clock received data on dpll */
336	#define SCC_WR11_RCLK_BAUDR 0x40 /* .. on BRG */
337	#define SCC_WR11_RCLK_TRc_PIN 0x20 /* .. on TRxC pin */
338	#define SCC_WR11_RCLK_RTc_PIN 0x00 /* .. on RTxC pin */
339	#define SCC_WR11_XTLK_DPLL 0x18
340	#define SCC_WR11_XTLK_BAUDR 0x10
341	#define SCC_WR11_XTLK_TRc_PIN 0x08
342	#define SCC_WR11_XTLK_RTc_PIN 0x00
343	#define SCC_WR11_TRc_OUT 0x04 /* drive TRxC pin as output from..*/
344	#define SCC_WR11_TRcOUT_DPLL 0x03 /* .. the dpll */
345	#define SCC_WR11_TRcOUT_BAUDR 0x02 /* .. the BRG */
346	#define SCC_WR11_TRcOUT_XMTCLK 0x01 /* .. the xmit clock */
347	#define SCC_WR11_TRcOUT_XTAL 0x00 /* .. the external oscillator */
348
349	/* WR12/WR13 are for timing base preset */
350	#define scc_set_timing_base(scc,chan,val) { \
351	scc_write_reg(scc,chan,SCC_RR12,val);\
352	scc_write_reg(scc,chan,SCC_RR13,(val)>>8);\
353	}
354
355	/* More commands in this register */
356	#define SCC_WR14_NRZI_MODE 0xe0 /* synch modulations */
357	#define SCC_WR14_FM_MODE 0xc0
358	#define SCC_WR14_RTc_SOURCE 0xa0 /* clock is from pin .. */
359	#define SCC_WR14_BAUDR_SOURCE 0x80 /* .. or internal BRG */
360	#define SCC_WR14_DISABLE_DPLL 0x60
361	#define SCC_WR14_RESET_CLKMISS 0x40
362	#define SCC_WR14_SEARCH_MODE 0x20
363	/* ..and more bitsy */
364	#define SCC_WR14_LOCAL_LOOPB 0x10
365	#define SCC_WR14_AUTO_ECHO 0x08
366	#define SCC_WR14_DTR_REQUEST 0x04
367	#define SCC_WR14_BAUDR_SRC 0x02
368	#define SCC_WR14_BAUDR_ENABLE 0x01
369
370	#define SCC_WR15_BREAK_IE 0x80
371	#define SCC_WR15_TX_UNDERRUN_IE 0x40
372	#define SCC_WR15_CTS_IE 0x20
373	#define SCC_WR15_SYNCHUNT_IE 0x10
374	#define SCC_WR15_DCD_IE 0x08
375	#define SCC_WR15_zero 0x05
376	#define SCC_WR15_ZERO_COUNT_IE 0x02
377	#define SCC_WR15_ENABLE_ESCC 0x01 /* Enable some ESCC registers */
378
379	#define NSCC_LINE 2 /* How many lines are support per 8530 */
380	/*
381	* Driver status
382	*/
383
384	#define SCC_FLAGS_DMA_PAUSED 0x00001 /* DMA has been paused because of XON/XOFF */
385	#define SCC_FLAGS_DMA_TX_BUSY 0x00002 /* On going DMA operation.. */
386
387	struct scc_softreg {
388	unsigned char wr1;
389	unsigned char wr4;
390	unsigned char wr5;
391	unsigned char wr14;
392
393	unsigned long speed;
394	unsigned long flags;
395	unsigned long dma_flags;
396	};
397
398
399	struct scc_softc {
400	scc_regmap_t regs;
401	struct scc_dma_ops *dma_ops;
402
403	/* software copy of some write regs, for reg \|= */
404	struct scc_softreg softr[NSCC_LINE];
405
406	int flags;
407	int modem[NSCC_LINE]; /* Mach modem bits (TM_DTR etc). */
408	int dcd_timer[NSCC_LINE];
409	int dma_initted;
410
411	char polling_mode;
412	char probed_once;
413
414	boolean_t full_modem;
415	};
416
417	#define DCD_TIMEOUT 4
418
419	typedef struct scc_softc *scc_softc_t;
420	extern struct scc_softc scc_softc[];
421
422	#endif /_SCC_8530_H_/