xref: /openbmc/linux/drivers/scsi/wd33c93.h (revision d4a0a0f2)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *    wd33c93.h -  Linux device driver definitions for the
4  *                 Commodore Amiga A2091/590 SCSI controller card
5  *
6  *    IMPORTANT: This file is for version 1.25 - 09/Jul/1997
7  *
8  * Copyright (c) 1996 John Shifflett, GeoLog Consulting
9  *    john@geolog.com
10  *    jshiffle@netcom.com
11  */
12 #ifndef WD33C93_H
13 #define WD33C93_H
14 
15 
16 #define PROC_INTERFACE     /* add code for /proc/scsi/wd33c93/xxx interface */
17 #ifdef  PROC_INTERFACE
18 #define PROC_STATISTICS    /* add code for keeping various real time stats */
19 #endif
20 
21 #define SYNC_DEBUG         /* extra info on sync negotiation printed */
22 #define DEBUGGING_ON       /* enable command-line debugging bitmask */
23 #define DEBUG_DEFAULTS 0   /* default debugging bitmask */
24 
25 
26 #ifdef DEBUGGING_ON
27 #define DB(f,a) if (hostdata->args & (f)) a;
28 #else
29 #define DB(f,a)
30 #endif
31 
32 #define uchar unsigned char
33 
34 
35 /* wd register names */
36 #define WD_OWN_ID    0x00
37 #define WD_CONTROL      0x01
38 #define WD_TIMEOUT_PERIOD  0x02
39 #define WD_CDB_1     0x03
40 #define WD_CDB_2     0x04
41 #define WD_CDB_3     0x05
42 #define WD_CDB_4     0x06
43 #define WD_CDB_5     0x07
44 #define WD_CDB_6     0x08
45 #define WD_CDB_7     0x09
46 #define WD_CDB_8     0x0a
47 #define WD_CDB_9     0x0b
48 #define WD_CDB_10    0x0c
49 #define WD_CDB_11    0x0d
50 #define WD_CDB_12    0x0e
51 #define WD_TARGET_LUN      0x0f
52 #define WD_COMMAND_PHASE   0x10
53 #define WD_SYNCHRONOUS_TRANSFER 0x11
54 #define WD_TRANSFER_COUNT_MSB 0x12
55 #define WD_TRANSFER_COUNT  0x13
56 #define WD_TRANSFER_COUNT_LSB 0x14
57 #define WD_DESTINATION_ID  0x15
58 #define WD_SOURCE_ID    0x16
59 #define WD_SCSI_STATUS     0x17
60 #define WD_COMMAND      0x18
61 #define WD_DATA      0x19
62 #define WD_QUEUE_TAG    0x1a
63 #define WD_AUXILIARY_STATUS   0x1f
64 
65 /* WD commands */
66 #define WD_CMD_RESET    0x00
67 #define WD_CMD_ABORT    0x01
68 #define WD_CMD_ASSERT_ATN  0x02
69 #define WD_CMD_NEGATE_ACK  0x03
70 #define WD_CMD_DISCONNECT  0x04
71 #define WD_CMD_RESELECT    0x05
72 #define WD_CMD_SEL_ATN     0x06
73 #define WD_CMD_SEL      0x07
74 #define WD_CMD_SEL_ATN_XFER   0x08
75 #define WD_CMD_SEL_XFER    0x09
76 #define WD_CMD_RESEL_RECEIVE  0x0a
77 #define WD_CMD_RESEL_SEND  0x0b
78 #define WD_CMD_WAIT_SEL_RECEIVE 0x0c
79 #define WD_CMD_TRANS_ADDR  0x18
80 #define WD_CMD_TRANS_INFO  0x20
81 #define WD_CMD_TRANSFER_PAD   0x21
82 #define WD_CMD_SBT_MODE    0x80
83 
84 /* ASR register */
85 #define ASR_INT         (0x80)
86 #define ASR_LCI         (0x40)
87 #define ASR_BSY         (0x20)
88 #define ASR_CIP         (0x10)
89 #define ASR_PE          (0x02)
90 #define ASR_DBR         (0x01)
91 
92 /* SCSI Bus Phases */
93 #define PHS_DATA_OUT    0x00
94 #define PHS_DATA_IN     0x01
95 #define PHS_COMMAND     0x02
96 #define PHS_STATUS      0x03
97 #define PHS_MESS_OUT    0x06
98 #define PHS_MESS_IN     0x07
99 
100 /* Command Status Register definitions */
101 
102   /* reset state interrupts */
103 #define CSR_RESET    0x00
104 #define CSR_RESET_AF    0x01
105 
106   /* successful completion interrupts */
107 #define CSR_RESELECT    0x10
108 #define CSR_SELECT      0x11
109 #define CSR_SEL_XFER_DONE  0x16
110 #define CSR_XFER_DONE      0x18
111 
112   /* paused or aborted interrupts */
113 #define CSR_MSGIN    0x20
114 #define CSR_SDP         0x21
115 #define CSR_SEL_ABORT      0x22
116 #define CSR_RESEL_ABORT    0x25
117 #define CSR_RESEL_ABORT_AM 0x27
118 #define CSR_ABORT    0x28
119 
120   /* terminated interrupts */
121 #define CSR_INVALID     0x40
122 #define CSR_UNEXP_DISC     0x41
123 #define CSR_TIMEOUT     0x42
124 #define CSR_PARITY      0x43
125 #define CSR_PARITY_ATN     0x44
126 #define CSR_BAD_STATUS     0x45
127 #define CSR_UNEXP    0x48
128 
129   /* service required interrupts */
130 #define CSR_RESEL    0x80
131 #define CSR_RESEL_AM    0x81
132 #define CSR_DISC     0x85
133 #define CSR_SRV_REQ     0x88
134 
135    /* Own ID/CDB Size register */
136 #define OWNID_EAF    0x08
137 #define OWNID_EHP    0x10
138 #define OWNID_RAF    0x20
139 #define OWNID_FS_8   0x00
140 #define OWNID_FS_12  0x40
141 #define OWNID_FS_16  0x80
142 
143    /* define these so we don't have to change a2091.c, etc. */
144 #define WD33C93_FS_8_10  OWNID_FS_8
145 #define WD33C93_FS_12_15 OWNID_FS_12
146 #define WD33C93_FS_16_20 OWNID_FS_16
147 
148    /* pass input-clock explicitly. accepted mhz values are 8-10,12-20 */
149 #define WD33C93_FS_MHZ(mhz) (mhz)
150 
151    /* Control register */
152 #define CTRL_HSP     0x01
153 #define CTRL_HA      0x02
154 #define CTRL_IDI     0x04
155 #define CTRL_EDI     0x08
156 #define CTRL_HHP     0x10
157 #define CTRL_POLLED  0x00
158 #define CTRL_BURST   0x20
159 #define CTRL_BUS     0x40
160 #define CTRL_DMA     0x80
161 
162    /* Timeout Period register */
163 #define TIMEOUT_PERIOD_VALUE  20    /* 20 = 200 ms */
164 
165    /* Synchronous Transfer Register */
166 #define STR_FSS      0x80
167 
168    /* Destination ID register */
169 #define DSTID_DPD    0x40
170 #define DATA_OUT_DIR 0
171 #define DATA_IN_DIR  1
172 #define DSTID_SCC    0x80
173 
174    /* Source ID register */
175 #define SRCID_MASK   0x07
176 #define SRCID_SIV    0x08
177 #define SRCID_DSP    0x20
178 #define SRCID_ES     0x40
179 #define SRCID_ER     0x80
180 
181    /* This is what the 3393 chip looks like to us */
182 typedef struct {
183    volatile unsigned char  *SASR;
184    volatile unsigned char  *SCMD;
185 } wd33c93_regs;
186 
187 
188 typedef int (*dma_setup_t) (struct scsi_cmnd *SCpnt, int dir_in);
189 typedef void (*dma_stop_t) (struct Scsi_Host *instance,
190 		struct scsi_cmnd *SCpnt, int status);
191 
192 
193 #define ILLEGAL_STATUS_BYTE   0xff
194 
195 #define DEFAULT_SX_PER   376     /* (ns) fairly safe */
196 #define DEFAULT_SX_OFF   0       /* aka async */
197 
198 #define OPTIMUM_SX_PER   252     /* (ns) best we can do (mult-of-4) */
199 #define OPTIMUM_SX_OFF   12      /* size of wd3393 fifo */
200 
201 struct sx_period {
202    unsigned int   period_ns;
203    uchar          reg_value;
204    };
205 
206 /* FEF: defines for hostdata->dma_buffer_pool */
207 
208 #define BUF_CHIP_ALLOCED 0
209 #define BUF_SCSI_ALLOCED 1
210 
211 struct WD33C93_hostdata {
212     struct Scsi_Host *next;
213     wd33c93_regs     regs;
214     spinlock_t       lock;
215     uchar            clock_freq;
216     uchar            chip;             /* what kind of wd33c93? */
217     uchar            microcode;        /* microcode rev */
218     uchar            dma_buffer_pool;  /* FEF: buffer from chip_ram? */
219     int              dma_dir;          /* data transfer dir. */
220     dma_setup_t      dma_setup;
221     dma_stop_t       dma_stop;
222     unsigned int     dma_xfer_mask;
223     uchar            *dma_bounce_buffer;
224     unsigned int     dma_bounce_len;
225     volatile uchar   busy[8];          /* index = target, bit = lun */
226     volatile struct scsi_cmnd *input_Q;       /* commands waiting to be started */
227     volatile struct scsi_cmnd *selecting;     /* trying to select this command */
228     volatile struct scsi_cmnd *connected;     /* currently connected command */
229     volatile struct scsi_cmnd *disconnected_Q;/* commands waiting for reconnect */
230     uchar            state;            /* what we are currently doing */
231     uchar            dma;              /* current state of DMA (on/off) */
232     uchar            level2;           /* extent to which Level-2 commands are used */
233     uchar            disconnect;       /* disconnect/reselect policy */
234     unsigned int     args;             /* set from command-line argument */
235     uchar            incoming_msg[8];  /* filled during message_in phase */
236     int              incoming_ptr;     /* mainly used with EXTENDED messages */
237     uchar            outgoing_msg[8];  /* send this during next message_out */
238     int              outgoing_len;     /* length of outgoing message */
239     unsigned int     default_sx_per;   /* default transfer period for SCSI bus */
240     uchar            sync_xfer[8];     /* sync_xfer reg settings per target */
241     uchar            sync_stat[8];     /* status of sync negotiation per target */
242     uchar            no_sync;          /* bitmask: don't do sync on these targets */
243     uchar            no_dma;           /* set this flag to disable DMA */
244     uchar            dma_mode;         /* DMA Burst Mode or Single Byte DMA */
245     uchar            fast;             /* set this flag to enable Fast SCSI */
246     struct sx_period sx_table[9];      /* transfer periods for actual DTC-setting */
247 #ifdef PROC_INTERFACE
248     uchar            proc;             /* bitmask: what's in proc output */
249 #ifdef PROC_STATISTICS
250     unsigned long    cmd_cnt[8];       /* # of commands issued per target */
251     unsigned long    int_cnt;          /* # of interrupts serviced */
252     unsigned long    pio_cnt;          /* # of pio data transfers */
253     unsigned long    dma_cnt;          /* # of DMA data transfers */
254     unsigned long    disc_allowed_cnt[8]; /* # of disconnects allowed per target */
255     unsigned long    disc_done_cnt[8]; /* # of disconnects done per target*/
256 #endif
257 #endif
258     };
259 
WD33C93_scsi_pointer(struct scsi_cmnd * cmd)260 static inline struct scsi_pointer *WD33C93_scsi_pointer(struct scsi_cmnd *cmd)
261 {
262 	return scsi_cmd_priv(cmd);
263 }
264 
265 /* defines for hostdata->chip */
266 
267 #define C_WD33C93       0
268 #define C_WD33C93A      1
269 #define C_WD33C93B      2
270 #define C_UNKNOWN_CHIP  100
271 
272 /* defines for hostdata->state */
273 
274 #define S_UNCONNECTED         0
275 #define S_SELECTING           1
276 #define S_RUNNING_LEVEL2      2
277 #define S_CONNECTED           3
278 #define S_PRE_TMP_DISC        4
279 #define S_PRE_CMP_DISC        5
280 
281 /* defines for hostdata->dma */
282 
283 #define D_DMA_OFF          0
284 #define D_DMA_RUNNING      1
285 
286 /* defines for hostdata->level2 */
287 /* NOTE: only the first 3 are implemented so far */
288 
289 #define L2_NONE      1  /* no combination commands - we get lots of ints */
290 #define L2_SELECT    2  /* start with SEL_ATN_XFER, but never resume it */
291 #define L2_BASIC     3  /* resume after STATUS ints & RDP messages */
292 #define L2_DATA      4  /* resume after DATA_IN/OUT ints */
293 #define L2_MOST      5  /* resume after anything except a RESELECT int */
294 #define L2_RESELECT  6  /* resume after everything, including RESELECT ints */
295 #define L2_ALL       7  /* always resume */
296 
297 /* defines for hostdata->disconnect */
298 
299 #define DIS_NEVER    0
300 #define DIS_ADAPTIVE 1
301 #define DIS_ALWAYS   2
302 
303 /* defines for hostdata->args */
304 
305 #define DB_TEST1              1<<0
306 #define DB_TEST2              1<<1
307 #define DB_QUEUE_COMMAND      1<<2
308 #define DB_EXECUTE            1<<3
309 #define DB_INTR               1<<4
310 #define DB_TRANSFER           1<<5
311 #define DB_MASK               0x3f
312 
313 /* defines for hostdata->sync_stat[] */
314 
315 #define SS_UNSET     0
316 #define SS_FIRST     1
317 #define SS_WAITING   2
318 #define SS_SET       3
319 
320 /* defines for hostdata->proc */
321 
322 #define PR_VERSION   1<<0
323 #define PR_INFO      1<<1
324 #define PR_STATISTICS 1<<2
325 #define PR_CONNECTED 1<<3
326 #define PR_INPUTQ    1<<4
327 #define PR_DISCQ     1<<5
328 #define PR_TEST      1<<6
329 #define PR_STOP      1<<7
330 
331 
332 void wd33c93_init (struct Scsi_Host *instance, const wd33c93_regs regs,
333          dma_setup_t setup, dma_stop_t stop, int clock_freq);
334 int wd33c93_abort (struct scsi_cmnd *cmd);
335 int wd33c93_queuecommand (struct Scsi_Host *h, struct scsi_cmnd *cmd);
336 void wd33c93_intr (struct Scsi_Host *instance);
337 int wd33c93_show_info(struct seq_file *, struct Scsi_Host *);
338 int wd33c93_write_info(struct Scsi_Host *, char *, int);
339 int wd33c93_host_reset (struct scsi_cmnd *);
340 
341 #endif /* WD33C93_H */
342