1 /* Low-level parallel port routines for the Multiface 3 card
3 * Author: Joerg Dorchain <joerg@dorchain.net>
5 * (C) The elitist m68k Users(TM)
7 * based on the existing parport_amiga and lp_mfc
10 * From the MFC3 documentation:
12 * Miscellaneous PIA Details
13 * -------------------------
15 * The two open-drain interrupt outputs /IRQA and /IRQB are routed to
16 * /INT2 of the Z2 bus.
18 * The CPU data bus of the PIA (D0-D7) is connected to D8-D15 on the Z2
19 * bus. This means that any PIA registers are accessed at even addresses.
21 * Centronics Pin Connections for the PIA
22 * --------------------------------------
24 * The following table shows the connections between the PIA and the
25 * Centronics interface connector. These connections implement a single, but
26 * very complete, Centronics type interface. The Pin column gives the pin
27 * numbers of the PIA. The Centronics pin numbers can be found in the section
28 * "Parallel Connectors".
31 * Pin | PIA | Dir | Centronics Names
32 * -------+-----+-----+---------------------------------------------------------
33 * 19 | CB2 | --> | /STROBE (aka /DRDY)
34 * 10-17 | PBx | <-> | DATA0 - DATA7
35 * 18 | CB1 | <-- | /ACK
36 * 40 | CA1 | <-- | BUSY
37 * 3 | PA1 | <-- | PAPER-OUT (aka POUT)
38 * 4 | PA2 | <-- | SELECTED (aka SEL)
39 * 9 | PA7 | --> | /INIT (aka /RESET or /INPUT-PRIME)
40 * 6 | PA4 | <-- | /ERROR (aka /FAULT)
41 * 7 | PA5 | --> | DIR (aka /SELECT-IN)
42 * 8 | PA6 | --> | /AUTO-FEED-XT
43 * 39 | CA2 | --> | open
44 * 5 | PA3 | <-- | /ACK (same as CB1!)
45 * 2 | PA0 | <-- | BUSY (same as CA1!)
46 * -------+-----+-----+---------------------------------------------------------
48 * Should be enough to understand some of the driver.
50 * Per convention for normal use the port registers are visible.
51 * If you need the data direction registers, restore the value in the
55 #include "multiface.h"
56 #include <linux/module.h>
57 #include <linux/init.h>
58 #include <linux/parport.h>
59 #include <linux/delay.h>
60 #include <linux/mc6821.h>
61 #include <linux/zorro.h>
62 #include <linux/interrupt.h>
63 #include <asm/setup.h>
64 #include <asm/amigahw.h>
66 #include <asm/amigaints.h>
68 /* Maximum Number of Cards supported */
73 #define DPRINTK printk
75 static inline int DPRINTK(void *nothing
, ...) {return 0;}
78 static struct parport
*this_port
[MAX_MFC
] = {NULL
, };
79 static volatile int dummy
; /* for trigger readds */
81 #define pia(dev) ((struct pia *)(dev->base))
82 static struct parport_operations pp_mfc3_ops
;
84 static void mfc3_write_data(struct parport
*p
, unsigned char data
)
86 DPRINTK(KERN_DEBUG
"write_data %c\n",data
);
88 dummy
= pia(p
)->pprb
; /* clears irq bit */
89 /* Triggers also /STROBE.*/
93 static unsigned char mfc3_read_data(struct parport
*p
)
95 /* clears interrupt bit. Triggers also /STROBE. */
99 static unsigned char control_pc_to_mfc3(unsigned char control
)
101 unsigned char ret
= 32|64;
103 if (control
& PARPORT_CONTROL_SELECT
)
104 ret
&= ~32; /* /SELECT_IN */
105 if (control
& PARPORT_CONTROL_INIT
) /* INITP */
107 if (control
& PARPORT_CONTROL_AUTOFD
) /* AUTOLF */
109 if (control
& PARPORT_CONTROL_STROBE
) /* Strobe */
110 /* Handled directly by hardware */;
114 static unsigned char control_mfc3_to_pc(unsigned char control
)
116 unsigned char ret
= PARPORT_CONTROL_STROBE
117 | PARPORT_CONTROL_AUTOFD
| PARPORT_CONTROL_SELECT
;
119 if (control
& 128) /* /INITP */
120 ret
|= PARPORT_CONTROL_INIT
;
121 if (control
& 64) /* /AUTOLF */
122 ret
&= ~PARPORT_CONTROL_AUTOFD
;
123 if (control
& 32) /* /SELECT_IN */
124 ret
&= ~PARPORT_CONTROL_SELECT
;
128 static void mfc3_write_control(struct parport
*p
, unsigned char control
)
130 DPRINTK(KERN_DEBUG
"write_control %02x\n",control
);
131 pia(p
)->ppra
= (pia(p
)->ppra
& 0x1f) | control_pc_to_mfc3(control
);
134 static unsigned char mfc3_read_control( struct parport
*p
)
136 DPRINTK(KERN_DEBUG
"read_control \n");
137 return control_mfc3_to_pc(pia(p
)->ppra
& 0xe0);
140 static unsigned char mfc3_frob_control( struct parport
*p
, unsigned char mask
, unsigned char val
)
144 DPRINTK(KERN_DEBUG
"frob_control mask %02x, value %02x\n",mask
,val
);
145 old
= mfc3_read_control(p
);
146 mfc3_write_control(p
, (old
& ~mask
) ^ val
);
151 static unsigned char status_mfc3_to_pc(unsigned char status
)
153 unsigned char ret
= PARPORT_STATUS_BUSY
;
155 if (status
& 1) /* Busy */
156 ret
&= ~PARPORT_STATUS_BUSY
;
157 if (status
& 2) /* PaperOut */
158 ret
|= PARPORT_STATUS_PAPEROUT
;
159 if (status
& 4) /* Selected */
160 ret
|= PARPORT_STATUS_SELECT
;
161 if (status
& 8) /* Ack */
162 ret
|= PARPORT_STATUS_ACK
;
163 if (status
& 16) /* /ERROR */
164 ret
|= PARPORT_STATUS_ERROR
;
170 static unsigned char mfc3_read_status(struct parport
*p
)
172 unsigned char status
;
174 status
= status_mfc3_to_pc(pia(p
)->ppra
& 0x1f);
175 DPRINTK(KERN_DEBUG
"read_status %02x\n", status
);
180 static int use_cnt
= 0;
182 static irqreturn_t
mfc3_interrupt(int irq
, void *dev_id
)
186 for( i
= 0; i
< MAX_MFC
; i
++)
187 if (this_port
[i
] != NULL
)
188 if (pia(this_port
[i
])->crb
& 128) { /* Board caused interrupt */
189 dummy
= pia(this_port
[i
])->pprb
; /* clear irq bit */
190 parport_generic_irq(this_port
[i
]);
195 static void mfc3_enable_irq(struct parport
*p
)
197 pia(p
)->crb
|= PIA_C1_ENABLE_IRQ
;
200 static void mfc3_disable_irq(struct parport
*p
)
202 pia(p
)->crb
&= ~PIA_C1_ENABLE_IRQ
;
205 static void mfc3_data_forward(struct parport
*p
)
207 DPRINTK(KERN_DEBUG
"forward\n");
208 pia(p
)->crb
&= ~PIA_DDR
; /* make data direction register visible */
209 pia(p
)->pddrb
= 255; /* all pins output */
210 pia(p
)->crb
|= PIA_DDR
; /* make data register visible - default */
213 static void mfc3_data_reverse(struct parport
*p
)
215 DPRINTK(KERN_DEBUG
"reverse\n");
216 pia(p
)->crb
&= ~PIA_DDR
; /* make data direction register visible */
217 pia(p
)->pddrb
= 0; /* all pins input */
218 pia(p
)->crb
|= PIA_DDR
; /* make data register visible - default */
221 static void mfc3_init_state(struct pardevice
*dev
, struct parport_state
*s
)
224 s
->u
.amiga
.datadir
= 255;
225 s
->u
.amiga
.status
= 0;
226 s
->u
.amiga
.statusdir
= 0xe0;
229 static void mfc3_save_state(struct parport
*p
, struct parport_state
*s
)
231 s
->u
.amiga
.data
= pia(p
)->pprb
;
232 pia(p
)->crb
&= ~PIA_DDR
;
233 s
->u
.amiga
.datadir
= pia(p
)->pddrb
;
234 pia(p
)->crb
|= PIA_DDR
;
235 s
->u
.amiga
.status
= pia(p
)->ppra
;
236 pia(p
)->cra
&= ~PIA_DDR
;
237 s
->u
.amiga
.statusdir
= pia(p
)->pddrb
;
238 pia(p
)->cra
|= PIA_DDR
;
241 static void mfc3_restore_state(struct parport
*p
, struct parport_state
*s
)
243 pia(p
)->pprb
= s
->u
.amiga
.data
;
244 pia(p
)->crb
&= ~PIA_DDR
;
245 pia(p
)->pddrb
= s
->u
.amiga
.datadir
;
246 pia(p
)->crb
|= PIA_DDR
;
247 pia(p
)->ppra
= s
->u
.amiga
.status
;
248 pia(p
)->cra
&= ~PIA_DDR
;
249 pia(p
)->pddrb
= s
->u
.amiga
.statusdir
;
250 pia(p
)->cra
|= PIA_DDR
;
253 static struct parport_operations pp_mfc3_ops
= {
254 .write_data
= mfc3_write_data
,
255 .read_data
= mfc3_read_data
,
257 .write_control
= mfc3_write_control
,
258 .read_control
= mfc3_read_control
,
259 .frob_control
= mfc3_frob_control
,
261 .read_status
= mfc3_read_status
,
263 .enable_irq
= mfc3_enable_irq
,
264 .disable_irq
= mfc3_disable_irq
,
266 .data_forward
= mfc3_data_forward
,
267 .data_reverse
= mfc3_data_reverse
,
269 .init_state
= mfc3_init_state
,
270 .save_state
= mfc3_save_state
,
271 .restore_state
= mfc3_restore_state
,
273 .epp_write_data
= parport_ieee1284_epp_write_data
,
274 .epp_read_data
= parport_ieee1284_epp_read_data
,
275 .epp_write_addr
= parport_ieee1284_epp_write_addr
,
276 .epp_read_addr
= parport_ieee1284_epp_read_addr
,
278 .ecp_write_data
= parport_ieee1284_ecp_write_data
,
279 .ecp_read_data
= parport_ieee1284_ecp_read_data
,
280 .ecp_write_addr
= parport_ieee1284_ecp_write_addr
,
282 .compat_write_data
= parport_ieee1284_write_compat
,
283 .nibble_read_data
= parport_ieee1284_read_nibble
,
284 .byte_read_data
= parport_ieee1284_read_byte
,
286 .owner
= THIS_MODULE
,
289 /* ----------- Initialisation code --------------------------------- */
291 static int __init
parport_mfc3_init(void)
296 struct zorro_dev
*z
= NULL
;
301 while ((z
= zorro_find_device(ZORRO_PROD_BSC_MULTIFACE_III
, z
))) {
302 unsigned long piabase
= z
->resource
.start
+PIABASE
;
303 if (!request_mem_region(piabase
, sizeof(struct pia
), "PIA"))
306 pp
= (struct pia
*)ZTWO_VADDR(piabase
);
308 pp
->pddrb
= 255; /* all data pins output */
309 pp
->crb
= PIA_DDR
|32|8;
310 dummy
= pp
->pddrb
; /* reading clears interrupt */
312 pp
->pddra
= 0xe0; /* /RESET, /DIR ,/AUTO-FEED output */
314 pp
->ppra
= 0; /* reset printer */
317 p
= parport_register_port((unsigned long)pp
, IRQ_AMIGA_PORTS
,
318 PARPORT_DMA_NONE
, &pp_mfc3_ops
);
322 if (p
->irq
!= PARPORT_IRQ_NONE
) {
324 if (request_irq(IRQ_AMIGA_PORTS
, mfc3_interrupt
, IRQF_SHARED
, p
->name
, &pp_mfc3_ops
))
329 this_port
[pias
++] = p
;
330 printk(KERN_INFO
"%s: Multiface III port using irq\n", p
->name
);
332 p
->private_data
= (void *)piabase
;
333 parport_announce_port (p
);
342 release_mem_region(piabase
, sizeof(struct pia
));
345 return pias
? 0 : -ENODEV
;
348 static void __exit
parport_mfc3_exit(void)
352 for (i
= 0; i
< MAX_MFC
; i
++) {
355 parport_remove_port(this_port
[i
]);
356 if (this_port
[i
]->irq
!= PARPORT_IRQ_NONE
) {
358 free_irq(IRQ_AMIGA_PORTS
, &pp_mfc3_ops
);
360 release_mem_region(ZTWO_PADDR(this_port
[i
]->private_data
), sizeof(struct pia
));
361 parport_put_port(this_port
[i
]);
366 MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
367 MODULE_DESCRIPTION("Parport Driver for Multiface 3 expansion cards Paralllel Port");
368 MODULE_SUPPORTED_DEVICE("Multiface 3 Parallel Port");
369 MODULE_LICENSE("GPL");
371 module_init(parport_mfc3_init
)
372 module_exit(parport_mfc3_exit
)