xref: /openbmc/linux/drivers/scsi/pcmcia/nsp_cs.h (revision ea39700f) 
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 
224 typedef 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 */
232 typedef 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 
244 typedef 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 */
288 static void        nsp_cs_detach (struct pcmcia_device *p_dev);
289 static void        nsp_cs_release(struct pcmcia_device *link);
290 static int        nsp_cs_config (struct pcmcia_device *link);
291 
292 /* Linux SCSI subsystem specific functions */
293 static struct Scsi_Host *nsp_detect     (struct scsi_host_template *sht);
294 static const  char      *nsp_info       (struct Scsi_Host *shpnt);
295 static        int        nsp_show_info  (struct seq_file *m,
296 	                                 struct Scsi_Host *host);
297 static 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);*/
302 static int nsp_eh_bus_reset    (struct scsi_cmnd *SCpnt);
303 static int nsp_eh_host_reset   (struct scsi_cmnd *SCpnt);
304 static int nsp_bus_reset       (nsp_hw_data *data);
305 
306 /* */
307 static void nsphw_init           (nsp_hw_data *data);
308 static bool nsphw_start_selection(struct scsi_cmnd *SCpnt);
309 static void nsp_start_timer      (struct scsi_cmnd *SCpnt, int time);
310 static int  nsp_fifo_count       (struct scsi_cmnd *SCpnt);
311 static void nsp_pio_read         (struct scsi_cmnd *SCpnt);
312 static void nsp_pio_write        (struct scsi_cmnd *SCpnt);
313 static int  nsp_nexus            (struct scsi_cmnd *SCpnt);
314 static void nsp_scsi_done        (struct scsi_cmnd *SCpnt);
315 static int  nsp_analyze_sdtr     (struct scsi_cmnd *SCpnt);
316 static int  nsp_negate_signal    (struct scsi_cmnd *SCpnt,
317 				  unsigned char mask, char *str);
318 static int  nsp_expect_signal    (struct scsi_cmnd *SCpnt,
319 				  unsigned char current_phase,
320 				  unsigned char  mask);
321 static int  nsp_xfer             (struct scsi_cmnd *SCpnt, int phase);
322 static int  nsp_dataphase_bypass (struct scsi_cmnd *SCpnt);
323 static void nsp_reselected       (struct scsi_cmnd *SCpnt);
324 static 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
331 static void show_command (struct scsi_cmnd *SCpnt);
332 static void show_phase   (struct scsi_cmnd *SCpnt);
333 static void show_busphase(unsigned char stat);
334 static 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  */
345 enum _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 
361 enum _data_in_out {
362 	IO_UNKNOWN,
363 	IO_IN,
364 	IO_OUT
365 };
366 
367 enum _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