[linux.git] / drivers / scsi / mac53c94.h

/*
 * mac53c94.h: definitions for the driver for the 53c94 SCSI bus adaptor
 * found on Power Macintosh computers, controlling the external SCSI chain.
 *
 * Copyright (C) 1996 Paul Mackerras.
 */
#ifndef _MAC53C94_H
#define _MAC53C94_H

/*
 * Registers in the 53C94 controller.
 */

struct mac53c94_regs {
	unsigned char	count_lo;
	char pad0[15];
	unsigned char	count_mid;
	char pad1[15];
	unsigned char	fifo;
	char pad2[15];
	unsigned char	command;
	char pad3[15];
	unsigned char	status;
	char pad4[15];
	unsigned char	interrupt;
	char pad5[15];
	unsigned char	seqstep;
	char pad6[15];
	unsigned char	flags;
	char pad7[15];
	unsigned char	config1;
	char pad8[15];
	unsigned char	clk_factor;
	char pad9[15];
	unsigned char	test;
	char pad10[15];
	unsigned char	config2;
	char pad11[15];
	unsigned char	config3;
	char pad12[15];
	unsigned char	config4;
	char pad13[15];
	unsigned char	count_hi;
	char pad14[15];
	unsigned char	fifo_res;
	char pad15[15];
};

/*
 * Alternate functions for some registers.
 */
#define dest_id		status
#define sel_timeout	interrupt
#define sync_period	seqstep
#define sync_offset	flags

/*
 * Bits in command register.
 */
#define CMD_DMA_MODE	0x80
#define CMD_MODE_MASK	0x70
#define CMD_MODE_INIT	0x10
#define CMD_MODE_TARG	0x20
#define CMD_MODE_DISC	0x40

#define CMD_NOP		0
#define CMD_FLUSH	1
#define CMD_RESET	2
#define CMD_SCSI_RESET	3

#define CMD_XFER_DATA	0x10
#define CMD_I_COMPLETE	0x11
#define CMD_ACCEPT_MSG	0x12
#define CMD_XFER_PAD	0x18
#define CMD_SET_ATN	0x1a
#define CMD_CLR_ATN	0x1b

#define CMD_SEND_MSG	0x20
#define CMD_SEND_STATUS	0x21
#define CMD_SEND_DATA	0x22
#define CMD_DISC_SEQ	0x23
#define CMD_TERMINATE	0x24
#define CMD_T_COMPLETE	0x25
#define CMD_DISCONNECT	0x27
#define CMD_RECV_MSG	0x28
#define CMD_RECV_CDB	0x29
#define CMD_RECV_DATA	0x2a
#define CMD_RECV_CMD	0x2b
#define CMD_ABORT_DMA	0x04

#define CMD_RESELECT	0x40
#define CMD_SELECT	0x41
#define CMD_SELECT_ATN	0x42
#define CMD_SELATN_STOP	0x43
#define CMD_ENABLE_SEL	0x44
#define CMD_DISABLE_SEL	0x45
#define CMD_SEL_ATN3	0x46
#define CMD_RESEL_ATN3	0x47

/*
 * Bits in status register.
 */
#define STAT_IRQ	0x80
#define STAT_ERROR	0x40
#define STAT_PARITY	0x20
#define STAT_TC_ZERO	0x10
#define STAT_DONE	0x08
#define STAT_PHASE	0x07
#define STAT_MSG	0x04
#define STAT_CD		0x02
#define STAT_IO		0x01

/*
 * Bits in interrupt register.
 */
#define INTR_RESET	0x80	/* SCSI bus was reset */
#define INTR_ILL_CMD	0x40	/* illegal command */
#define INTR_DISCONNECT	0x20	/* we got disconnected */
#define INTR_BUS_SERV	0x10	/* bus service requested */
#define INTR_DONE	0x08	/* function completed */
#define INTR_RESELECTED	0x04	/* we were reselected */
#define INTR_SEL_ATN	0x02	/* we were selected, ATN asserted */
#define INTR_SELECT	0x01	/* we were selected, ATN negated */

/*
 * Encoding for the select timeout.
 */
#define TIMO_VAL(x)	((x) * 5000 / 7682)

/*
 * Bits in sequence step register.
 */
#define SS_MASK		7
#define SS_ARB_SEL	0	/* Selection & arbitration complete */
#define SS_MSG_SENT	1	/* One message byte sent */
#define SS_NOT_CMD	2	/* Not in command phase */
#define SS_PHASE_CHG	3	/* Early phase change, cmd bytes lost */
#define SS_DONE		4	/* Command was sent OK */

/*
 * Encoding for sync transfer period.
 */
#define SYNCP_MASK	0x1f
#define SYNCP_MIN	4
#define SYNCP_MAX	31

/*
 * Bits in flags register.
 */
#define FLAGS_FIFO_LEV	0x1f
#define FLAGS_SEQ_STEP	0xe0

/*
 * Encoding for sync offset.
 */
#define SYNCO_MASK	0x0f
#define SYNCO_ASS_CTRL	0x30	/* REQ/ACK assertion control */
#define SYNCO_NEG_CTRL	0xc0	/* REQ/ACK negation control */

/*
 * Bits in config1 register.
 */
#define CF1_SLOW_CABLE	0x80	/* Slow cable mode */
#define CF1_NO_RES_REP	0x40	/* Disable SCSI reset reports */
#define CF1_PAR_TEST	0x20	/* Parity test mode enable */
#define CF1_PAR_ENABLE	0x10	/* Enable parity checks */
#define CF1_TEST	0x08	/* Chip tests */
#define CF1_MY_ID	0x07	/* Controller's address on bus */

/*
 * Encoding for clk_factor register.
 */
#define CLKF_MASK	7
#define CLKF_VAL(freq)	((((freq) + 4999999) / 5000000) & CLKF_MASK)

/*
 * Bits in test mode register.
 */
#define TEST_TARGET	1	/* target test mode */
#define TEST_INITIATOR	2	/* initiator test mode */
#define TEST_TRISTATE	4	/* tristate (hi-z) test mode */

/*
 * Bits in config2 register.
 */
#define CF2_RFB		0x80
#define CF2_FEATURE_EN	0x40	/* enable features / phase latch */
#define CF2_BYTECTRL	0x20
#define CF2_DREQ_HIZ	0x10
#define CF2_SCSI2	0x08
#define CF2_PAR_ABORT	0x04	/* bad parity target abort */
#define CF2_REG_PARERR	0x02	/* register parity error */
#define CF2_DMA_PARERR	0x01	/* DMA parity error */

/*
 * Bits in the config3 register.
 */
#define CF3_ID_MSG_CHK	0x80
#define CF3_3B_MSGS	0x40
#define CF3_CDB10	0x20
#define CF3_FASTSCSI	0x10	/* enable fast SCSI support */
#define CF3_FASTCLOCK	0x08
#define CF3_SAVERESID	0x04
#define CF3_ALT_DMA	0x02
#define CF3_THRESH_8	0x01

/*
 * Bits in the config4 register.
 */
#define CF4_EAN		0x04
#define CF4_TEST	0x02
#define CF4_BBTE	0x01

#endif /* _MAC53C94_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* mac53c94.h: definitions for the driver for the 53c94 SCSI bus adaptor
	3	* found on Power Macintosh computers, controlling the external SCSI chain.
	4	*
	5	* Copyright (C) 1996 Paul Mackerras.
	6	*/
	7	#ifndef _MAC53C94_H
	8	#define _MAC53C94_H
	9
	10	/*
	11	* Registers in the 53C94 controller.
	12	*/
	13
	14	struct mac53c94_regs {
	15	unsigned char count_lo;
	16	char pad0[15];
	17	unsigned char count_mid;
	18	char pad1[15];
	19	unsigned char fifo;
	20	char pad2[15];
	21	unsigned char command;
	22	char pad3[15];
	23	unsigned char status;
	24	char pad4[15];
	25	unsigned char interrupt;
	26	char pad5[15];
	27	unsigned char seqstep;
	28	char pad6[15];
	29	unsigned char flags;
	30	char pad7[15];
	31	unsigned char config1;
	32	char pad8[15];
	33	unsigned char clk_factor;
	34	char pad9[15];
	35	unsigned char test;
	36	char pad10[15];
	37	unsigned char config2;
	38	char pad11[15];
	39	unsigned char config3;
	40	char pad12[15];
	41	unsigned char config4;
	42	char pad13[15];
	43	unsigned char count_hi;
	44	char pad14[15];
	45	unsigned char fifo_res;
	46	char pad15[15];
	47	};
	48
	49	/*
	50	* Alternate functions for some registers.
	51	*/
	52	#define dest_id status
	53	#define sel_timeout interrupt
	54	#define sync_period seqstep
	55	#define sync_offset flags
	56
	57	/*
	58	* Bits in command register.
	59	*/
	60	#define CMD_DMA_MODE 0x80
	61	#define CMD_MODE_MASK 0x70
	62	#define CMD_MODE_INIT 0x10
	63	#define CMD_MODE_TARG 0x20
	64	#define CMD_MODE_DISC 0x40
65
66	#define CMD_NOP 0
67	#define CMD_FLUSH 1
68	#define CMD_RESET 2
69	#define CMD_SCSI_RESET 3
70
71	#define CMD_XFER_DATA 0x10
72	#define CMD_I_COMPLETE 0x11
73	#define CMD_ACCEPT_MSG 0x12
74	#define CMD_XFER_PAD 0x18
75	#define CMD_SET_ATN 0x1a
76	#define CMD_CLR_ATN 0x1b
77
78	#define CMD_SEND_MSG 0x20
79	#define CMD_SEND_STATUS 0x21
80	#define CMD_SEND_DATA 0x22
81	#define CMD_DISC_SEQ 0x23
82	#define CMD_TERMINATE 0x24
83	#define CMD_T_COMPLETE 0x25
84	#define CMD_DISCONNECT 0x27
85	#define CMD_RECV_MSG 0x28
86	#define CMD_RECV_CDB 0x29
87	#define CMD_RECV_DATA 0x2a
88	#define CMD_RECV_CMD 0x2b
89	#define CMD_ABORT_DMA 0x04
90
91	#define CMD_RESELECT 0x40
92	#define CMD_SELECT 0x41
93	#define CMD_SELECT_ATN 0x42
94	#define CMD_SELATN_STOP 0x43
95	#define CMD_ENABLE_SEL 0x44
96	#define CMD_DISABLE_SEL 0x45
97	#define CMD_SEL_ATN3 0x46
98	#define CMD_RESEL_ATN3 0x47
99
100	/*
101	* Bits in status register.
102	*/
103	#define STAT_IRQ 0x80
104	#define STAT_ERROR 0x40
105	#define STAT_PARITY 0x20
106	#define STAT_TC_ZERO 0x10
107	#define STAT_DONE 0x08
108	#define STAT_PHASE 0x07
109	#define STAT_MSG 0x04
110	#define STAT_CD 0x02
111	#define STAT_IO 0x01
112
113	/*
114	* Bits in interrupt register.
115	*/
116	#define INTR_RESET 0x80 /* SCSI bus was reset */
117	#define INTR_ILL_CMD 0x40 /* illegal command */
118	#define INTR_DISCONNECT 0x20 /* we got disconnected */
119	#define INTR_BUS_SERV 0x10 /* bus service requested */
120	#define INTR_DONE 0x08 /* function completed */
121	#define INTR_RESELECTED 0x04 /* we were reselected */
122	#define INTR_SEL_ATN 0x02 /* we were selected, ATN asserted */
123	#define INTR_SELECT 0x01 /* we were selected, ATN negated */
124
125	/*
126	* Encoding for the select timeout.
127	*/
128	#define TIMO_VAL(x) ((x) * 5000 / 7682)
129
130	/*
131	* Bits in sequence step register.
132	*/
133	#define SS_MASK 7
134	#define SS_ARB_SEL 0 /* Selection & arbitration complete */
135	#define SS_MSG_SENT 1 /* One message byte sent */
136	#define SS_NOT_CMD 2 /* Not in command phase */
137	#define SS_PHASE_CHG 3 /* Early phase change, cmd bytes lost */
138	#define SS_DONE 4 /* Command was sent OK */
139
140	/*
141	* Encoding for sync transfer period.
142	*/
143	#define SYNCP_MASK 0x1f
144	#define SYNCP_MIN 4
145	#define SYNCP_MAX 31
146
147	/*
148	* Bits in flags register.
149	*/
150	#define FLAGS_FIFO_LEV 0x1f
151	#define FLAGS_SEQ_STEP 0xe0
152
153	/*
154	* Encoding for sync offset.
155	*/
156	#define SYNCO_MASK 0x0f
157	#define SYNCO_ASS_CTRL 0x30 /* REQ/ACK assertion control */
158	#define SYNCO_NEG_CTRL 0xc0 /* REQ/ACK negation control */
159
160	/*
161	* Bits in config1 register.
162	*/
163	#define CF1_SLOW_CABLE 0x80 /* Slow cable mode */
164	#define CF1_NO_RES_REP 0x40 /* Disable SCSI reset reports */
165	#define CF1_PAR_TEST 0x20 /* Parity test mode enable */
166	#define CF1_PAR_ENABLE 0x10 /* Enable parity checks */
167	#define CF1_TEST 0x08 /* Chip tests */
168	#define CF1_MY_ID 0x07 /* Controller's address on bus */
169
170	/*
171	* Encoding for clk_factor register.
172	*/
173	#define CLKF_MASK 7
174	#define CLKF_VAL(freq) ((((freq) + 4999999) / 5000000) & CLKF_MASK)
175
176	/*
177	* Bits in test mode register.
178	*/
179	#define TEST_TARGET 1 /* target test mode */
180	#define TEST_INITIATOR 2 /* initiator test mode */
181	#define TEST_TRISTATE 4 /* tristate (hi-z) test mode */
182
183	/*
184	* Bits in config2 register.
185	*/
186	#define CF2_RFB 0x80
187	#define CF2_FEATURE_EN 0x40 /* enable features / phase latch */
188	#define CF2_BYTECTRL 0x20
189	#define CF2_DREQ_HIZ 0x10
190	#define CF2_SCSI2 0x08
191	#define CF2_PAR_ABORT 0x04 /* bad parity target abort */
192	#define CF2_REG_PARERR 0x02 /* register parity error */
193	#define CF2_DMA_PARERR 0x01 /* DMA parity error */
194
195	/*
196	* Bits in the config3 register.
197	*/
198	#define CF3_ID_MSG_CHK 0x80
199	#define CF3_3B_MSGS 0x40
200	#define CF3_CDB10 0x20
201	#define CF3_FASTSCSI 0x10 /* enable fast SCSI support */
202	#define CF3_FASTCLOCK 0x08
203	#define CF3_SAVERESID 0x04
204	#define CF3_ALT_DMA 0x02
205	#define CF3_THRESH_8 0x01
206
207	/*
208	* Bits in the config4 register.
209	*/
210	#define CF4_EAN 0x04
211	#define CF4_TEST 0x02
212	#define CF4_BBTE 0x01
213
214	#endif /* _MAC53C94_H */