aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/pcmcia/nsp_cs.h
blob: 8908b8e5b78a993ce627ce6a59ac25b5f5014122 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
/*=======================================================/
  Header file for nsp_cs.c
      By: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>

    Ver.1.0 : Cut unused lines.
    Ver 0.1 : Initial version.

    This software may be used and distributed according to the terms of
    the GNU General Public License.

=========================================================*/

/* $Id: nsp_cs.h,v 1.19 2003/08/18 11:09:19 elca Exp $ */

#ifndef  __nsp_cs__
#define  __nsp_cs__

/* for debugging */
//#define NSP_DEBUG 9

/*
#define static
#define inline
*/

/************************************
 * Some useful macros...
 */
#define BIT(x)      (1L << (x))

/* SCSI initiator must be ID 7 */
#define NSP_INITIATOR_ID  7

#define NSP_SELTIMEOUT 200

/***************************************************************************
 * register definitions
 ***************************************************************************/
/*========================================================================
 * base register
 ========================================================================*/
#define	IRQCONTROL	0x00  /* R */
#  define IRQCONTROL_RESELECT_CLEAR     BIT(0)
#  define IRQCONTROL_PHASE_CHANGE_CLEAR BIT(1)
#  define IRQCONTROL_TIMER_CLEAR        BIT(2)
#  define IRQCONTROL_FIFO_CLEAR         BIT(3)
#  define IRQCONTROL_ALLMASK            0xff
#  define IRQCONTROL_ALLCLEAR           (IRQCONTROL_RESELECT_CLEAR     | \
					 IRQCONTROL_PHASE_CHANGE_CLEAR | \
					 IRQCONTROL_TIMER_CLEAR        | \
					 IRQCONTROL_FIFO_CLEAR          )
#  define IRQCONTROL_IRQDISABLE         0xf0

#define	IRQSTATUS	0x00  /* W */
#  define IRQSTATUS_SCSI  BIT(0)
#  define IRQSTATUS_TIMER BIT(2)
#  define IRQSTATUS_FIFO  BIT(3)
#  define IRQSTATUS_MASK  0x0f

#define	IFSELECT	0x01 /* W */
#  define IF_IFSEL    BIT(0)
#  define IF_REGSEL   BIT(2)

#define	FIFOSTATUS	0x01 /* R */
#  define FIFOSTATUS_CHIP_REVISION_MASK 0x0f
#  define FIFOSTATUS_CHIP_ID_MASK       0x70
#  define FIFOSTATUS_FULL_EMPTY         BIT(7)

#define	INDEXREG	0x02 /* R/W */
#define	DATAREG		0x03 /* R/W */
#define	FIFODATA	0x04 /* R/W */
#define	FIFODATA1	0x05 /* R/W */
#define	FIFODATA2	0x06 /* R/W */
#define	FIFODATA3	0x07 /* R/W */

/*====================================================================
 * indexed register
 ====================================================================*/
#define EXTBUSCTRL	0x10 /* R/W,deleted */

#define CLOCKDIV	0x11 /* R/W */
#  define CLOCK_40M 0x02
#  define CLOCK_20M 0x01
#  define FAST_20   BIT(2)

#define TERMPWRCTRL	0x13 /* R/W */
#  define POWER_ON BIT(0)

#define SCSIIRQMODE	0x15 /* R/W */
#  define SCSI_PHASE_CHANGE_EI BIT(0)
#  define RESELECT_EI          BIT(4)
#  define FIFO_IRQ_EI          BIT(5)
#  define SCSI_RESET_IRQ_EI    BIT(6)

#define IRQPHASESENCE	0x16 /* R */
#  define LATCHED_MSG      BIT(0)
#  define LATCHED_IO       BIT(1)
#  define LATCHED_CD       BIT(2)
#  define LATCHED_BUS_FREE BIT(3)
#  define PHASE_CHANGE_IRQ BIT(4)
#  define RESELECT_IRQ     BIT(5)
#  define FIFO_IRQ         BIT(6)
#  define SCSI_RESET_IRQ   BIT(7)

#define TIMERCOUNT	0x17 /* R/W */

#define SCSIBUSCTRL	0x18 /* R/W */
#  define SCSI_SEL         BIT(0)
#  define SCSI_RST         BIT(1)
#  define SCSI_DATAOUT_ENB BIT(2)
#  define SCSI_ATN         BIT(3)
#  define SCSI_ACK         BIT(4)
#  define SCSI_BSY         BIT(5)
#  define AUTODIRECTION    BIT(6)
#  define ACKENB           BIT(7)

#define SCSIBUSMON	0x19 /* R */

#define SETARBIT	0x1A /* W */
#  define ARBIT_GO         BIT(0)
#  define ARBIT_FLAG_CLEAR BIT(1)

#define ARBITSTATUS	0x1A /* R */
/*#  define ARBIT_GO        BIT(0)*/
#  define ARBIT_WIN        BIT(1)
#  define ARBIT_FAIL       BIT(2)
#  define RESELECT_FLAG    BIT(3)

#define PARITYCTRL	0x1B  /* W */
#define PARITYSTATUS	0x1B  /* R */

#define COMMANDCTRL	0x1C  /* W */
#  define CLEAR_COMMAND_POINTER BIT(0)
#  define AUTO_COMMAND_GO       BIT(1)

#define RESELECTID	0x1C  /* R   */
#define COMMANDDATA	0x1D  /* R/W */

#define POINTERCLR	0x1E  /*   W */
#  define POINTER_CLEAR      BIT(0)
#  define ACK_COUNTER_CLEAR  BIT(1)
#  define REQ_COUNTER_CLEAR  BIT(2)
#  define HOST_COUNTER_CLEAR BIT(3)
#  define READ_SOURCE        (BIT(4) | BIT(5))
#    define ACK_COUNTER        (0)
#    define REQ_COUNTER        (BIT(4))
#    define HOST_COUNTER       (BIT(5))

#define TRANSFERCOUNT	0x1E  /* R   */

#define TRANSFERMODE	0x20  /* R/W */
#  define MODE_MEM8   BIT(0)
#  define MODE_MEM32  BIT(1)
#  define MODE_ADR24  BIT(2)
#  define MODE_ADR32  BIT(3)
#  define MODE_IO8    BIT(4)
#  define MODE_IO32   BIT(5)
#  define TRANSFER_GO BIT(6)
#  define BRAIND      BIT(7)

#define SYNCREG		0x21 /* R/W */
#  define SYNCREG_OFFSET_MASK  0x0f
#  define SYNCREG_PERIOD_MASK  0xf0
#  define SYNCREG_PERIOD_SHIFT 4

#define SCSIDATALATCH	0x22 /*   W */
#define SCSIDATAIN	0x22 /* R   */
#define SCSIDATAWITHACK	0x23 /* R/W */
#define SCAMCONTROL	0x24 /*   W */
#define SCAMSTATUS	0x24 /* R   */
#define SCAMDATA	0x25 /* R/W */

#define OTHERCONTROL	0x26 /* R/W */
#  define TPL_ROM_WRITE_EN BIT(0)
#  define TPWR_OUT         BIT(1)
#  define TPWR_SENSE       BIT(2)
#  define RA8_CONTROL      BIT(3)

#define ACKWIDTH	0x27 /* R/W */
#define CLRTESTPNT	0x28 /*   W */
#define ACKCNTLD	0x29 /*   W */
#define REQCNTLD	0x2A /*   W */
#define HSTCNTLD	0x2B /*   W */
#define CHECKSUM	0x2C /* R/W */

/************************************************************************
 * Input status bit definitions.
 ************************************************************************/
#define S_MESSAGE	BIT(0)    /* Message line from SCSI bus      */
#define S_IO		BIT(1)    /* Input/Output line from SCSI bus */
#define S_CD		BIT(2)    /* Command/Data line from SCSI bus */
#define S_BUSY		BIT(3)    /* Busy line from SCSI bus         */
#define S_ACK		BIT(4)    /* Acknowlege line from SCSI bus   */
#define S_REQUEST	BIT(5)    /* Request line from SCSI bus      */
#define S_SELECT	BIT(6)	  /*                                 */
#define S_ATN		BIT(7)	  /*                                 */

/***********************************************************************
 * Useful Bus Monitor status combinations.
 ***********************************************************************/
#define BUSMON_SEL         S_SELECT
#define BUSMON_BSY         S_BUSY
#define BUSMON_REQ         S_REQUEST
#define BUSMON_IO          S_IO
#define BUSMON_ACK         S_ACK
#define BUSMON_BUS_FREE    0
#define BUSMON_COMMAND     ( S_BUSY | S_CD |                    S_REQUEST )
#define BUSMON_MESSAGE_IN  ( S_BUSY | S_CD | S_IO | S_MESSAGE | S_REQUEST )
#define BUSMON_MESSAGE_OUT ( S_BUSY | S_CD |        S_MESSAGE | S_REQUEST )
#define BUSMON_DATA_IN     ( S_BUSY |        S_IO |             S_REQUEST )
#define BUSMON_DATA_OUT    ( S_BUSY |                           S_REQUEST )
#define BUSMON_STATUS      ( S_BUSY | S_CD | S_IO |             S_REQUEST )
#define BUSMON_SELECT      (                 S_IO |                        S_SELECT )
#define BUSMON_RESELECT    (                 S_IO |                        S_SELECT )
#define BUSMON_PHASE_MASK  (          S_CD | S_IO | S_MESSAGE |            S_SELECT )

#define BUSPHASE_SELECT      ( BUSMON_SELECT      & BUSMON_PHASE_MASK )
#define BUSPHASE_COMMAND     ( BUSMON_COMMAND     & BUSMON_PHASE_MASK )
#define BUSPHASE_MESSAGE_IN  ( BUSMON_MESSAGE_IN  & BUSMON_PHASE_MASK )
#define BUSPHASE_MESSAGE_OUT ( BUSMON_MESSAGE_OUT & BUSMON_PHASE_MASK )
#define BUSPHASE_DATA_IN     ( BUSMON_DATA_IN     & BUSMON_PHASE_MASK )
#define BUSPHASE_DATA_OUT    ( BUSMON_DATA_OUT    & BUSMON_PHASE_MASK )
#define BUSPHASE_STATUS      ( BUSMON_STATUS      & BUSMON_PHASE_MASK )

/*====================================================================*/

typedef struct scsi_info_t {
	struct pcmcia_device	*p_dev;
	struct Scsi_Host      *host;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,74))
	dev_node_t             node;
#else
	int	               ndev;
	dev_node_t             node[8];
	struct bus_operations *bus;
#endif
	int                    stop;
} scsi_info_t;


/* synchronous transfer negotiation data */
typedef struct _sync_data {
	unsigned int SyncNegotiation;
#define SYNC_NOT_YET 0
#define SYNC_OK      1
#define SYNC_NG      2

	unsigned int  SyncPeriod;
	unsigned int  SyncOffset;
	unsigned char SyncRegister;
	unsigned char AckWidth;
} sync_data;

typedef struct _nsp_hw_data {
	unsigned int  BaseAddress;
	unsigned int  NumAddress;
	unsigned int  IrqNumber;

	unsigned long MmioAddress;
#define NSP_MMIO_OFFSET 0x0800
	unsigned long MmioLength;

	unsigned char ScsiClockDiv;

	unsigned char TransferMode;

	int           TimerCount;
	int           SelectionTimeOut;
	Scsi_Cmnd    *CurrentSC;
	//int           CurrnetTarget;

	int           FifoCount;

#define MSGBUF_SIZE 20
	unsigned char MsgBuffer[MSGBUF_SIZE];
	int MsgLen;

#define N_TARGET 8
	sync_data     Sync[N_TARGET];

	char nspinfo[110];     /* description */
	spinlock_t Lock;

	scsi_info_t   *ScsiInfo; /* attach <-> detect glue */


#ifdef NSP_DEBUG
	int CmdId; /* Accepted command serial number.
		      Used for debugging.             */
#endif
} nsp_hw_data;


/****************************************************************************
 *
 */

/* Card service functions */
static void        nsp_cs_detach (struct pcmcia_device *p_dev);
static void        nsp_cs_release(struct pcmcia_device *link);
static int        nsp_cs_config (struct pcmcia_device *link);

/* Linux SCSI subsystem specific functions */
static struct Scsi_Host *nsp_detect     (struct scsi_host_template *sht);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
static        int        nsp_detect_old (struct scsi_host_template *sht);
static        int        nsp_release_old(struct Scsi_Host *shpnt);
#endif
static const  char      *nsp_info       (struct Scsi_Host *shpnt);
static        int        nsp_proc_info  (
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
	                                 struct Scsi_Host *host,
#endif
					 char   *buffer,
					 char  **start,
					 off_t   offset,
					 int     length,
#if !(LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
					 int     hostno,
#endif
					 int     inout);
static        int        nsp_queuecommand(Scsi_Cmnd *SCpnt, void (* done)(Scsi_Cmnd *SCpnt));

/* Error handler */
/*static int nsp_eh_abort       (Scsi_Cmnd *SCpnt);*/
/*static int nsp_eh_device_reset(Scsi_Cmnd *SCpnt);*/
static int nsp_eh_bus_reset    (Scsi_Cmnd *SCpnt);
static int nsp_eh_host_reset   (Scsi_Cmnd *SCpnt);
static int nsp_bus_reset       (nsp_hw_data *data);

/* */
static int  nsphw_init           (nsp_hw_data *data);
static int  nsphw_start_selection(Scsi_Cmnd *SCpnt);
static void nsp_start_timer      (Scsi_Cmnd *SCpnt, int time);
static int  nsp_fifo_count       (Scsi_Cmnd *SCpnt);
static void nsp_pio_read         (Scsi_Cmnd *SCpnt);
static void nsp_pio_write        (Scsi_Cmnd *SCpnt);
static int  nsp_nexus            (Scsi_Cmnd *SCpnt);
static void nsp_scsi_done        (Scsi_Cmnd *SCpnt);
static int  nsp_analyze_sdtr     (Scsi_Cmnd *SCpnt);
static int  nsp_negate_signal    (Scsi_Cmnd *SCpnt, unsigned char mask, char *str);
static int  nsp_expect_signal    (Scsi_Cmnd *SCpnt, unsigned char current_phase, unsigned char  mask);
static int  nsp_xfer             (Scsi_Cmnd *SCpnt, int phase);
static int  nsp_dataphase_bypass (Scsi_Cmnd *SCpnt);
static int  nsp_reselected       (Scsi_Cmnd *SCpnt);
static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht);

/* Interrupt handler */
//static irqreturn_t nspintr(int irq, void *dev_id, struct pt_regs *regs);

/* Module entry point*/
static int  __init nsp_cs_init(void);
static void __exit nsp_cs_exit(void);


/* Debug */
#ifdef NSP_DEBUG
static void show_command (Scsi_Cmnd *SCpnt);
static void show_phase   (Scsi_Cmnd *SCpnt);
static void show_busphase(unsigned char stat);
static void show_message (nsp_hw_data *data);
#else
# define show_command(ptr)   /* */
# define show_phase(SCpnt)   /* */
# define show_busphase(stat) /* */
# define show_message(data)  /* */
#endif

/*
 * SCSI phase
 */
enum _scsi_phase {
	PH_UNDETERMINED ,
	PH_ARBSTART     ,
	PH_SELSTART     ,
	PH_SELECTED     ,
	PH_COMMAND      ,
	PH_DATA         ,
	PH_STATUS       ,
	PH_MSG_IN       ,
	PH_MSG_OUT      ,
	PH_DISCONNECT   ,
	PH_RESELECT     ,
	PH_ABORT        ,
	PH_RESET
};

enum _data_in_out {
	IO_UNKNOWN,
	IO_IN,
	IO_OUT
};

enum _burst_mode {
	BURST_IO8   = 0,
	BURST_IO32  = 1,
	BURST_MEM32 = 2,
};


/**************************************************************************
 * SCSI messaage
 */
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_EXTENDED         0x01
#define MSG_ABORT            0x06
#define MSG_NO_OPERATION     0x08
#define MSG_BUS_DEVICE_RESET 0x0c

#define MSG_EXT_SDTR         0x01


/**************************************************************************
 * Compatibility functions
 */

/* for Kernel 2.4 */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
#  define scsi_register_host(template)   scsi_register_module(MODULE_SCSI_HA, template)
#  define scsi_unregister_host(template) scsi_unregister_module(MODULE_SCSI_HA, template)
#  define scsi_host_put(host)            scsi_unregister(host)

typedef void irqreturn_t;
#  define IRQ_NONE      /* */
#  define IRQ_HANDLED   /* */
#  define IRQ_RETVAL(x) /* */

/* This is ad-hoc version of scsi_host_get_next() */
static inline struct Scsi_Host *scsi_host_get_next(struct Scsi_Host *host)
{
	if (host == NULL) {
		return scsi_hostlist;
	} else {
		return host->next;
	}
}

/* This is ad-hoc version of scsi_host_hn_get() */
static inline struct Scsi_Host *scsi_host_hn_get(unsigned short hostno)
{
	struct Scsi_Host *host;

	for (host = scsi_host_get_next(NULL); host != NULL;
	     host = scsi_host_get_next(host)) {
		if (host->host_no == hostno) {
			break;
		}
	}

	return host;
}

static void cs_error(struct pcmcia_device *handle, int func, int ret)
{
	error_info_t err = { func, ret };
	pcmcia_report_error(handle, &err);
}

/* scatter-gather table */
#  define BUFFER_ADDR (SCpnt->SCp.buffer->address)
#endif

/* for Kernel 2.6 */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
/* scatter-gather table */
#  define BUFFER_ADDR ((char *)((unsigned int)(SCpnt->SCp.buffer->page) + SCpnt->SCp.buffer->offset))
#endif

#endif  /*__nsp_cs__*/
/* end */