1/*=======================================================/
2  Header file for nsp_cs.c
3      By: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
4
5    Ver.1.0 : Cut unused lines.
6    Ver 0.1 : Initial version.
7
8    This software may be used and distributed according to the terms of
9    the GNU General Public License.
10
11=========================================================*/
12
13#ifndef  __nsp_cs__
14#define  __nsp_cs__
15
16/* for debugging */
17//#define NSP_DEBUG 9
18
19/*
20#define static
21#define inline
22*/
23
24/************************************
25 * Some useful macros...
26 */
27
28/* SCSI initiator must be ID 7 */
29#define NSP_INITIATOR_ID  7
30
31#define NSP_SELTIMEOUT 200
32
33/***************************************************************************
34 * register definitions
35 ***************************************************************************/
36/*========================================================================
37 * base register
38 ========================================================================*/
39#define	IRQCONTROL	0x00  /* R */
40#  define IRQCONTROL_RESELECT_CLEAR     BIT(0)
41#  define IRQCONTROL_PHASE_CHANGE_CLEAR BIT(1)
42#  define IRQCONTROL_TIMER_CLEAR        BIT(2)
43#  define IRQCONTROL_FIFO_CLEAR         BIT(3)
44#  define IRQCONTROL_ALLMASK            0xff
45#  define IRQCONTROL_ALLCLEAR           (IRQCONTROL_RESELECT_CLEAR     | \
46					 IRQCONTROL_PHASE_CHANGE_CLEAR | \
47					 IRQCONTROL_TIMER_CLEAR        | \
48					 IRQCONTROL_FIFO_CLEAR          )
49#  define IRQCONTROL_IRQDISABLE         0xf0
50
51#define	IRQSTATUS	0x00  /* W */
52#  define IRQSTATUS_SCSI  BIT(0)
53#  define IRQSTATUS_TIMER BIT(2)
54#  define IRQSTATUS_FIFO  BIT(3)
55#  define IRQSTATUS_MASK  0x0f
56
57#define	IFSELECT	0x01 /* W */
58#  define IF_IFSEL    BIT(0)
59#  define IF_REGSEL   BIT(2)
60
61#define	FIFOSTATUS	0x01 /* R */
62#  define FIFOSTATUS_CHIP_REVISION_MASK 0x0f
63#  define FIFOSTATUS_CHIP_ID_MASK       0x70
64#  define FIFOSTATUS_FULL_EMPTY         BIT(7)
65
66#define	INDEXREG	0x02 /* R/W */
67#define	DATAREG		0x03 /* R/W */
68#define	FIFODATA	0x04 /* R/W */
69#define	FIFODATA1	0x05 /* R/W */
70#define	FIFODATA2	0x06 /* R/W */
71#define	FIFODATA3	0x07 /* R/W */
72
73/*====================================================================
74 * indexed register
75 ====================================================================*/
76#define EXTBUSCTRL	0x10 /* R/W,deleted */
77
78#define CLOCKDIV	0x11 /* R/W */
79#  define CLOCK_40M 0x02
80#  define CLOCK_20M 0x01
81#  define FAST_20   BIT(2)
82
83#define TERMPWRCTRL	0x13 /* R/W */
84#  define POWER_ON BIT(0)
85
86#define SCSIIRQMODE	0x15 /* R/W */
87#  define SCSI_PHASE_CHANGE_EI BIT(0)
88#  define RESELECT_EI          BIT(4)
89#  define FIFO_IRQ_EI          BIT(5)
90#  define SCSI_RESET_IRQ_EI    BIT(6)
91
92#define IRQPHASESENCE	0x16 /* R */
93#  define LATCHED_MSG      BIT(0)
94#  define LATCHED_IO       BIT(1)
95#  define LATCHED_CD       BIT(2)
96#  define LATCHED_BUS_FREE BIT(3)
97#  define PHASE_CHANGE_IRQ BIT(4)
98#  define RESELECT_IRQ     BIT(5)
99#  define FIFO_IRQ         BIT(6)
100#  define SCSI_RESET_IRQ   BIT(7)
101
102#define TIMERCOUNT	0x17 /* R/W */
103
104#define SCSIBUSCTRL	0x18 /* R/W */
105#  define SCSI_SEL         BIT(0)
106#  define SCSI_RST         BIT(1)
107#  define SCSI_DATAOUT_ENB BIT(2)
108#  define SCSI_ATN         BIT(3)
109#  define SCSI_ACK         BIT(4)
110#  define SCSI_BSY         BIT(5)
111#  define AUTODIRECTION    BIT(6)
112#  define ACKENB           BIT(7)
113
114#define SCSIBUSMON	0x19 /* R */
115
116#define SETARBIT	0x1A /* W */
117#  define ARBIT_GO         BIT(0)
118#  define ARBIT_FLAG_CLEAR BIT(1)
119
120#define ARBITSTATUS	0x1A /* R */
121/*#  define ARBIT_GO        BIT(0)*/
122#  define ARBIT_WIN        BIT(1)
123#  define ARBIT_FAIL       BIT(2)
124#  define RESELECT_FLAG    BIT(3)
125
126#define PARITYCTRL	0x1B  /* W */
127#define PARITYSTATUS	0x1B  /* R */
128
129#define COMMANDCTRL	0x1C  /* W */
130#  define CLEAR_COMMAND_POINTER BIT(0)
131#  define AUTO_COMMAND_GO       BIT(1)
132
133#define RESELECTID	0x1C  /* R   */
134#define COMMANDDATA	0x1D  /* R/W */
135
136#define POINTERCLR	0x1E  /*   W */
137#  define POINTER_CLEAR      BIT(0)
138#  define ACK_COUNTER_CLEAR  BIT(1)
139#  define REQ_COUNTER_CLEAR  BIT(2)
140#  define HOST_COUNTER_CLEAR BIT(3)
141#  define READ_SOURCE        (BIT(4) | BIT(5))
142#    define ACK_COUNTER        (0)
143#    define REQ_COUNTER        (BIT(4))
144#    define HOST_COUNTER       (BIT(5))
145
146#define TRANSFERCOUNT	0x1E  /* R   */
147
148#define TRANSFERMODE	0x20  /* R/W */
149#  define MODE_MEM8   BIT(0)
150#  define MODE_MEM32  BIT(1)
151#  define MODE_ADR24  BIT(2)
152#  define MODE_ADR32  BIT(3)
153#  define MODE_IO8    BIT(4)
154#  define MODE_IO32   BIT(5)
155#  define TRANSFER_GO BIT(6)
156#  define BRAIND      BIT(7)
157
158#define SYNCREG		0x21 /* R/W */
159#  define SYNCREG_OFFSET_MASK  0x0f
160#  define SYNCREG_PERIOD_MASK  0xf0
161#  define SYNCREG_PERIOD_SHIFT 4
162
163#define SCSIDATALATCH	0x22 /*   W */
164#define SCSIDATAIN	0x22 /* R   */
165#define SCSIDATAWITHACK	0x23 /* R/W */
166#define SCAMCONTROL	0x24 /*   W */
167#define SCAMSTATUS	0x24 /* R   */
168#define SCAMDATA	0x25 /* R/W */
169
170#define OTHERCONTROL	0x26 /* R/W */
171#  define TPL_ROM_WRITE_EN BIT(0)
172#  define TPWR_OUT         BIT(1)
173#  define TPWR_SENSE       BIT(2)
174#  define RA8_CONTROL      BIT(3)
175
176#define ACKWIDTH	0x27 /* R/W */
177#define CLRTESTPNT	0x28 /*   W */
178#define ACKCNTLD	0x29 /*   W */
179#define REQCNTLD	0x2A /*   W */
180#define HSTCNTLD	0x2B /*   W */
181#define CHECKSUM	0x2C /* R/W */
182
183/************************************************************************
184 * Input status bit definitions.
185 ************************************************************************/
186#define S_MESSAGE	BIT(0)    /* Message line from SCSI bus      */
187#define S_IO		BIT(1)    /* Input/Output line from SCSI bus */
188#define S_CD		BIT(2)    /* Command/Data line from SCSI bus */
189#define S_BUSY		BIT(3)    /* Busy line from SCSI bus         */
190#define S_ACK		BIT(4)    /* Acknowledge line from SCSI bus  */
191#define S_REQUEST	BIT(5)    /* Request line from SCSI bus      */
192#define S_SELECT	BIT(6)	  /*                                 */
193#define S_ATN		BIT(7)	  /*                                 */
194
195/***********************************************************************
196 * Useful Bus Monitor status combinations.
197 ***********************************************************************/
198#define BUSMON_SEL         S_SELECT
199#define BUSMON_BSY         S_BUSY
200#define BUSMON_REQ         S_REQUEST
201#define BUSMON_IO          S_IO
202#define BUSMON_ACK         S_ACK
203#define BUSMON_BUS_FREE    0
204#define BUSMON_COMMAND     ( S_BUSY | S_CD |                    S_REQUEST )
205#define BUSMON_MESSAGE_IN  ( S_BUSY | S_CD | S_IO | S_MESSAGE | S_REQUEST )
206#define BUSMON_MESSAGE_OUT ( S_BUSY | S_CD |        S_MESSAGE | S_REQUEST )
207#define BUSMON_DATA_IN     ( S_BUSY |        S_IO |             S_REQUEST )
208#define BUSMON_DATA_OUT    ( S_BUSY |                           S_REQUEST )
209#define BUSMON_STATUS      ( S_BUSY | S_CD | S_IO |             S_REQUEST )
210#define BUSMON_SELECT      (                 S_IO |                        S_SELECT )
211#define BUSMON_RESELECT    (                 S_IO |                        S_SELECT )
212#define BUSMON_PHASE_MASK  (          S_CD | S_IO | S_MESSAGE |            S_SELECT )
213
214#define BUSPHASE_SELECT      ( BUSMON_SELECT      & BUSMON_PHASE_MASK )
215#define BUSPHASE_COMMAND     ( BUSMON_COMMAND     & BUSMON_PHASE_MASK )
216#define BUSPHASE_MESSAGE_IN  ( BUSMON_MESSAGE_IN  & BUSMON_PHASE_MASK )
217#define BUSPHASE_MESSAGE_OUT ( BUSMON_MESSAGE_OUT & BUSMON_PHASE_MASK )
218#define BUSPHASE_DATA_IN     ( BUSMON_DATA_IN     & BUSMON_PHASE_MASK )
219#define BUSPHASE_DATA_OUT    ( BUSMON_DATA_OUT    & BUSMON_PHASE_MASK )
220#define BUSPHASE_STATUS      ( BUSMON_STATUS      & BUSMON_PHASE_MASK )
221
222/*====================================================================*/
223
224typedef struct scsi_info_t {
225	struct pcmcia_device	*p_dev;
226	struct Scsi_Host      *host;
227	int                    stop;
228} scsi_info_t;
229
230
231/* synchronous transfer negotiation data */
232typedef struct _sync_data {
233	unsigned int SyncNegotiation;
234#define SYNC_NOT_YET 0
235#define SYNC_OK      1
236#define SYNC_NG      2
237
238	unsigned int  SyncPeriod;
239	unsigned int  SyncOffset;
240	unsigned char SyncRegister;
241	unsigned char AckWidth;
242} sync_data;
243
244typedef struct _nsp_hw_data {
245	unsigned int  BaseAddress;
246	unsigned int  NumAddress;
247	unsigned int  IrqNumber;
248
249	unsigned long MmioAddress;
250#define NSP_MMIO_OFFSET 0x0800
251	unsigned long MmioLength;
252
253	unsigned char ScsiClockDiv;
254
255	unsigned char TransferMode;
256
257	int           TimerCount;
258	int           SelectionTimeOut;
259	struct scsi_cmnd *CurrentSC;
260	//int           CurrnetTarget;
261
262	int           FifoCount;
263
264#define MSGBUF_SIZE 20
265	unsigned char MsgBuffer[MSGBUF_SIZE];
266	int MsgLen;
267
268#define N_TARGET 8
269	sync_data     Sync[N_TARGET];
270
271	char nspinfo[110];     /* description */
272	spinlock_t Lock;
273
274	scsi_info_t   *ScsiInfo; /* attach <-> detect glue */
275
276
277#ifdef NSP_DEBUG
278	int CmdId; /* Accepted command serial number.
279		      Used for debugging.             */
280#endif
281} nsp_hw_data;
282
283/****************************************************************************
284 *
285 */
286
287/* Card service functions */
288static void        nsp_cs_detach (struct pcmcia_device *p_dev);
289static void        nsp_cs_release(struct pcmcia_device *link);
290static int        nsp_cs_config (struct pcmcia_device *link);
291
292/* Linux SCSI subsystem specific functions */
293static struct Scsi_Host *nsp_detect     (struct scsi_host_template *sht);
294static const  char      *nsp_info       (struct Scsi_Host *shpnt);
295static        int        nsp_show_info  (struct seq_file *m,
296	                                 struct Scsi_Host *host);
297static int nsp_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *SCpnt);
298
299/* Error handler */
300/*static int nsp_eh_abort       (struct scsi_cmnd *SCpnt);*/
301/*static int nsp_eh_device_reset(struct scsi_cmnd *SCpnt);*/
302static int nsp_eh_bus_reset    (struct scsi_cmnd *SCpnt);
303static int nsp_eh_host_reset   (struct scsi_cmnd *SCpnt);
304static int nsp_bus_reset       (nsp_hw_data *data);
305
306/* */
307static void nsphw_init           (nsp_hw_data *data);
308static bool nsphw_start_selection(struct scsi_cmnd *SCpnt);
309static void nsp_start_timer      (struct scsi_cmnd *SCpnt, int time);
310static int  nsp_fifo_count       (struct scsi_cmnd *SCpnt);
311static void nsp_pio_read         (struct scsi_cmnd *SCpnt);
312static void nsp_pio_write        (struct scsi_cmnd *SCpnt);
313static int  nsp_nexus            (struct scsi_cmnd *SCpnt);
314static void nsp_scsi_done        (struct scsi_cmnd *SCpnt);
315static int  nsp_analyze_sdtr     (struct scsi_cmnd *SCpnt);
316static int  nsp_negate_signal    (struct scsi_cmnd *SCpnt,
317				  unsigned char mask, char *str);
318static int  nsp_expect_signal    (struct scsi_cmnd *SCpnt,
319				  unsigned char current_phase,
320				  unsigned char  mask);
321static int  nsp_xfer             (struct scsi_cmnd *SCpnt, int phase);
322static int  nsp_dataphase_bypass (struct scsi_cmnd *SCpnt);
323static void nsp_reselected       (struct scsi_cmnd *SCpnt);
324static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht);
325
326/* Interrupt handler */
327//static irqreturn_t nspintr(int irq, void *dev_id);
328
329/* Debug */
330#ifdef NSP_DEBUG
331static void show_command (struct scsi_cmnd *SCpnt);
332static void show_phase   (struct scsi_cmnd *SCpnt);
333static void show_busphase(unsigned char stat);
334static void show_message (nsp_hw_data *data);
335#else
336# define show_command(ptr)   /* */
337# define show_phase(SCpnt)   /* */
338# define show_busphase(stat) /* */
339# define show_message(data)  /* */
340#endif
341
342/*
343 * SCSI phase
344 */
345enum _scsi_phase {
346	PH_UNDETERMINED ,
347	PH_ARBSTART     ,
348	PH_SELSTART     ,
349	PH_SELECTED     ,
350	PH_COMMAND      ,
351	PH_DATA         ,
352	PH_STATUS       ,
353	PH_MSG_IN       ,
354	PH_MSG_OUT      ,
355	PH_DISCONNECT   ,
356	PH_RESELECT     ,
357	PH_ABORT        ,
358	PH_RESET
359};
360
361enum _data_in_out {
362	IO_UNKNOWN,
363	IO_IN,
364	IO_OUT
365};
366
367enum _burst_mode {
368	BURST_IO8   = 0,
369	BURST_IO32  = 1,
370	BURST_MEM32 = 2,
371};
372
373/* scatter-gather table */
374#define BUFFER_ADDR(SCpnt) ((char *)(sg_virt(nsp_priv(SCpnt)->buffer)))
375
376#endif  /*__nsp_cs__*/
377/* end */
378