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1da177e4 LT |
1 | /* Low-level parallel port routines for the Multiface 3 card |
2 | * | |
3 | * Author: Joerg Dorchain <joerg@dorchain.net> | |
4 | * | |
5 | * (C) The elitist m68k Users(TM) | |
6 | * | |
7 | * based on the existing parport_amiga and lp_mfc | |
8 | * | |
9 | * | |
10 | * From the MFC3 documentation: | |
11 | * | |
12 | * Miscellaneous PIA Details | |
13 | * ------------------------- | |
14 | * | |
15 | * The two open-drain interrupt outputs /IRQA and /IRQB are routed to | |
16 | * /INT2 of the Z2 bus. | |
17 | * | |
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. | |
20 | * | |
21 | * Centronics Pin Connections for the PIA | |
22 | * -------------------------------------- | |
23 | * | |
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". | |
29 | * | |
30 | * | |
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 | * -------+-----+-----+--------------------------------------------------------- | |
47 | * | |
48 | * Should be enough to understand some of the driver. | |
49 | * | |
50 | * Per convention for normal use the port registers are visible. | |
51 | * If you need the data direction registers, restore the value in the | |
52 | * control register. | |
53 | */ | |
54 | ||
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> | |
65 | #include <asm/irq.h> | |
66 | #include <asm/amigaints.h> | |
67 | ||
68 | /* Maximum Number of Cards supported */ | |
69 | #define MAX_MFC 5 | |
70 | ||
71 | #undef DEBUG | |
72 | #ifdef DEBUG | |
73 | #define DPRINTK printk | |
74 | #else | |
75 | static inline int DPRINTK(void *nothing, ...) {return 0;} | |
76 | #endif | |
77 | ||
78 | static struct parport *this_port[MAX_MFC] = {NULL, }; | |
79 | static volatile int dummy; /* for trigger readds */ | |
80 | ||
81 | #define pia(dev) ((struct pia *)(dev->base)) | |
82 | static struct parport_operations pp_mfc3_ops; | |
83 | ||
84 | static void mfc3_write_data(struct parport *p, unsigned char data) | |
85 | { | |
86 | DPRINTK(KERN_DEBUG "write_data %c\n",data); | |
87 | ||
88 | dummy = pia(p)->pprb; /* clears irq bit */ | |
89 | /* Triggers also /STROBE.*/ | |
90 | pia(p)->pprb = data; | |
91 | } | |
92 | ||
93 | static unsigned char mfc3_read_data(struct parport *p) | |
94 | { | |
95 | /* clears interrupt bit. Triggers also /STROBE. */ | |
96 | return pia(p)->pprb; | |
97 | } | |
98 | ||
99 | static unsigned char control_pc_to_mfc3(unsigned char control) | |
100 | { | |
101 | unsigned char ret = 32|64; | |
102 | ||
103 | if (control & PARPORT_CONTROL_SELECT) /* XXX: What is SELECP? */ | |
104 | ret &= ~32; /* /SELECT_IN */ | |
105 | if (control & PARPORT_CONTROL_INIT) /* INITP */ | |
106 | ret |= 128; | |
107 | if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */ | |
108 | ret &= ~64; | |
109 | if (control & PARPORT_CONTROL_STROBE) /* Strobe */ | |
110 | /* Handled directly by hardware */; | |
111 | return ret; | |
112 | } | |
113 | ||
114 | static unsigned char control_mfc3_to_pc(unsigned char control) | |
115 | { | |
116 | unsigned char ret = PARPORT_CONTROL_STROBE | |
117 | | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT; | |
118 | ||
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; | |
125 | return ret; | |
126 | } | |
127 | ||
128 | static void mfc3_write_control(struct parport *p, unsigned char control) | |
129 | { | |
130 | DPRINTK(KERN_DEBUG "write_control %02x\n",control); | |
131 | pia(p)->ppra = (pia(p)->ppra & 0x1f) | control_pc_to_mfc3(control); | |
132 | } | |
133 | ||
134 | static unsigned char mfc3_read_control( struct parport *p) | |
135 | { | |
136 | DPRINTK(KERN_DEBUG "read_control \n"); | |
137 | return control_mfc3_to_pc(pia(p)->ppra & 0xe0); | |
138 | } | |
139 | ||
140 | static unsigned char mfc3_frob_control( struct parport *p, unsigned char mask, unsigned char val) | |
141 | { | |
142 | unsigned char old; | |
143 | ||
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); | |
147 | return old; | |
148 | } | |
149 | ||
150 | #if 0 /* currently unused */ | |
151 | static unsigned char status_pc_to_mfc3(unsigned char status) | |
152 | { | |
153 | unsigned char ret = 1; | |
154 | ||
155 | if (status & PARPORT_STATUS_BUSY) /* Busy */ | |
156 | ret &= ~1; | |
157 | if (status & PARPORT_STATUS_ACK) /* Ack */ | |
158 | ret |= 8; | |
159 | if (status & PARPORT_STATUS_PAPEROUT) /* PaperOut */ | |
160 | ret |= 2; | |
161 | if (status & PARPORT_STATUS_SELECT) /* select */ | |
162 | ret |= 4; | |
163 | if (status & PARPORT_STATUS_ERROR) /* error */ | |
164 | ret |= 16; | |
165 | return ret; | |
166 | } | |
167 | #endif | |
168 | ||
169 | static unsigned char status_mfc3_to_pc(unsigned char status) | |
170 | { | |
171 | unsigned char ret = PARPORT_STATUS_BUSY; | |
172 | ||
173 | if (status & 1) /* Busy */ | |
174 | ret &= ~PARPORT_STATUS_BUSY; | |
175 | if (status & 2) /* PaperOut */ | |
176 | ret |= PARPORT_STATUS_PAPEROUT; | |
177 | if (status & 4) /* Selected */ | |
178 | ret |= PARPORT_STATUS_SELECT; | |
179 | if (status & 8) /* Ack */ | |
180 | ret |= PARPORT_STATUS_ACK; | |
181 | if (status & 16) /* /ERROR */ | |
182 | ret |= PARPORT_STATUS_ERROR; | |
183 | ||
184 | return ret; | |
185 | } | |
186 | ||
187 | #if 0 /* currently unused */ | |
188 | static void mfc3_write_status( struct parport *p, unsigned char status) | |
189 | { | |
190 | DPRINTK(KERN_DEBUG "write_status %02x\n",status); | |
191 | pia(p)->ppra = (pia(p)->ppra & 0xe0) | status_pc_to_mfc3(status); | |
192 | } | |
193 | #endif | |
194 | ||
195 | static unsigned char mfc3_read_status(struct parport *p) | |
196 | { | |
197 | unsigned char status; | |
198 | ||
199 | status = status_mfc3_to_pc(pia(p)->ppra & 0x1f); | |
200 | DPRINTK(KERN_DEBUG "read_status %02x\n", status); | |
201 | return status; | |
202 | } | |
203 | ||
204 | #if 0 /* currently unused */ | |
205 | static void mfc3_change_mode( struct parport *p, int m) | |
206 | { | |
207 | /* XXX: This port only has one mode, and I am | |
208 | not sure about the corresponding PC-style mode*/ | |
209 | } | |
210 | #endif | |
211 | ||
212 | static int use_cnt = 0; | |
213 | ||
7d12e780 | 214 | static irqreturn_t mfc3_interrupt(int irq, void *dev_id) |
1da177e4 LT |
215 | { |
216 | int i; | |
217 | ||
218 | for( i = 0; i < MAX_MFC; i++) | |
219 | if (this_port[i] != NULL) | |
220 | if (pia(this_port[i])->crb & 128) { /* Board caused interrupt */ | |
221 | dummy = pia(this_port[i])->pprb; /* clear irq bit */ | |
f230d101 | 222 | parport_generic_irq(this_port[i]); |
1da177e4 LT |
223 | } |
224 | return IRQ_HANDLED; | |
225 | } | |
226 | ||
227 | static void mfc3_enable_irq(struct parport *p) | |
228 | { | |
229 | pia(p)->crb |= PIA_C1_ENABLE_IRQ; | |
230 | } | |
231 | ||
232 | static void mfc3_disable_irq(struct parport *p) | |
233 | { | |
234 | pia(p)->crb &= ~PIA_C1_ENABLE_IRQ; | |
235 | } | |
236 | ||
237 | static void mfc3_data_forward(struct parport *p) | |
238 | { | |
239 | DPRINTK(KERN_DEBUG "forward\n"); | |
240 | pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */ | |
241 | pia(p)->pddrb = 255; /* all pins output */ | |
242 | pia(p)->crb |= PIA_DDR; /* make data register visible - default */ | |
243 | } | |
244 | ||
245 | static void mfc3_data_reverse(struct parport *p) | |
246 | { | |
247 | DPRINTK(KERN_DEBUG "reverse\n"); | |
248 | pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */ | |
249 | pia(p)->pddrb = 0; /* all pins input */ | |
250 | pia(p)->crb |= PIA_DDR; /* make data register visible - default */ | |
251 | } | |
252 | ||
253 | static void mfc3_init_state(struct pardevice *dev, struct parport_state *s) | |
254 | { | |
255 | s->u.amiga.data = 0; | |
256 | s->u.amiga.datadir = 255; | |
257 | s->u.amiga.status = 0; | |
258 | s->u.amiga.statusdir = 0xe0; | |
259 | } | |
260 | ||
261 | static void mfc3_save_state(struct parport *p, struct parport_state *s) | |
262 | { | |
263 | s->u.amiga.data = pia(p)->pprb; | |
264 | pia(p)->crb &= ~PIA_DDR; | |
265 | s->u.amiga.datadir = pia(p)->pddrb; | |
266 | pia(p)->crb |= PIA_DDR; | |
267 | s->u.amiga.status = pia(p)->ppra; | |
268 | pia(p)->cra &= ~PIA_DDR; | |
269 | s->u.amiga.statusdir = pia(p)->pddrb; | |
270 | pia(p)->cra |= PIA_DDR; | |
271 | } | |
272 | ||
273 | static void mfc3_restore_state(struct parport *p, struct parport_state *s) | |
274 | { | |
275 | pia(p)->pprb = s->u.amiga.data; | |
276 | pia(p)->crb &= ~PIA_DDR; | |
277 | pia(p)->pddrb = s->u.amiga.datadir; | |
278 | pia(p)->crb |= PIA_DDR; | |
279 | pia(p)->ppra = s->u.amiga.status; | |
280 | pia(p)->cra &= ~PIA_DDR; | |
281 | pia(p)->pddrb = s->u.amiga.statusdir; | |
282 | pia(p)->cra |= PIA_DDR; | |
283 | } | |
284 | ||
285 | static struct parport_operations pp_mfc3_ops = { | |
286 | .write_data = mfc3_write_data, | |
287 | .read_data = mfc3_read_data, | |
288 | ||
289 | .write_control = mfc3_write_control, | |
290 | .read_control = mfc3_read_control, | |
291 | .frob_control = mfc3_frob_control, | |
292 | ||
293 | .read_status = mfc3_read_status, | |
294 | ||
295 | .enable_irq = mfc3_enable_irq, | |
296 | .disable_irq = mfc3_disable_irq, | |
297 | ||
298 | .data_forward = mfc3_data_forward, | |
299 | .data_reverse = mfc3_data_reverse, | |
300 | ||
301 | .init_state = mfc3_init_state, | |
302 | .save_state = mfc3_save_state, | |
303 | .restore_state = mfc3_restore_state, | |
304 | ||
305 | .epp_write_data = parport_ieee1284_epp_write_data, | |
306 | .epp_read_data = parport_ieee1284_epp_read_data, | |
307 | .epp_write_addr = parport_ieee1284_epp_write_addr, | |
308 | .epp_read_addr = parport_ieee1284_epp_read_addr, | |
309 | ||
310 | .ecp_write_data = parport_ieee1284_ecp_write_data, | |
311 | .ecp_read_data = parport_ieee1284_ecp_read_data, | |
312 | .ecp_write_addr = parport_ieee1284_ecp_write_addr, | |
313 | ||
314 | .compat_write_data = parport_ieee1284_write_compat, | |
315 | .nibble_read_data = parport_ieee1284_read_nibble, | |
316 | .byte_read_data = parport_ieee1284_read_byte, | |
317 | ||
318 | .owner = THIS_MODULE, | |
319 | }; | |
320 | ||
321 | /* ----------- Initialisation code --------------------------------- */ | |
322 | ||
323 | static int __init parport_mfc3_init(void) | |
324 | { | |
325 | struct parport *p; | |
326 | int pias = 0; | |
327 | struct pia *pp; | |
328 | struct zorro_dev *z = NULL; | |
329 | ||
330 | if (!MACH_IS_AMIGA) | |
331 | return -ENODEV; | |
332 | ||
333 | while ((z = zorro_find_device(ZORRO_PROD_BSC_MULTIFACE_III, z))) { | |
334 | unsigned long piabase = z->resource.start+PIABASE; | |
335 | if (!request_mem_region(piabase, sizeof(struct pia), "PIA")) | |
336 | continue; | |
337 | ||
338 | pp = (struct pia *)ZTWO_VADDR(piabase); | |
339 | pp->crb = 0; | |
340 | pp->pddrb = 255; /* all data pins output */ | |
341 | pp->crb = PIA_DDR|32|8; | |
342 | dummy = pp->pddrb; /* reading clears interrupt */ | |
343 | pp->cra = 0; | |
344 | pp->pddra = 0xe0; /* /RESET, /DIR ,/AUTO-FEED output */ | |
345 | pp->cra = PIA_DDR; | |
346 | pp->ppra = 0; /* reset printer */ | |
347 | udelay(10); | |
348 | pp->ppra = 128; | |
349 | p = parport_register_port((unsigned long)pp, IRQ_AMIGA_PORTS, | |
350 | PARPORT_DMA_NONE, &pp_mfc3_ops); | |
351 | if (!p) | |
352 | goto out_port; | |
353 | ||
354 | if (p->irq != PARPORT_IRQ_NONE) { | |
355 | if (use_cnt++ == 0) | |
dace1453 | 356 | if (request_irq(IRQ_AMIGA_PORTS, mfc3_interrupt, IRQF_SHARED, p->name, &pp_mfc3_ops)) |
1da177e4 LT |
357 | goto out_irq; |
358 | } | |
c15a3837 | 359 | p->dev = &z->dev; |
1da177e4 LT |
360 | |
361 | this_port[pias++] = p; | |
362 | printk(KERN_INFO "%s: Multiface III port using irq\n", p->name); | |
363 | /* XXX: set operating mode */ | |
364 | ||
365 | p->private_data = (void *)piabase; | |
366 | parport_announce_port (p); | |
367 | ||
368 | if (pias >= MAX_MFC) | |
369 | break; | |
370 | continue; | |
371 | ||
372 | out_irq: | |
373 | parport_put_port(p); | |
374 | out_port: | |
375 | release_mem_region(piabase, sizeof(struct pia)); | |
376 | } | |
377 | ||
378 | return pias ? 0 : -ENODEV; | |
379 | } | |
380 | ||
381 | static void __exit parport_mfc3_exit(void) | |
382 | { | |
383 | int i; | |
384 | ||
385 | for (i = 0; i < MAX_MFC; i++) { | |
386 | if (!this_port[i]) | |
387 | continue; | |
388 | parport_remove_port(this_port[i]); | |
389 | if (!this_port[i]->irq != PARPORT_IRQ_NONE) { | |
390 | if (--use_cnt == 0) | |
391 | free_irq(IRQ_AMIGA_PORTS, &pp_mfc3_ops); | |
392 | } | |
393 | release_mem_region(ZTWO_PADDR(this_port[i]->private_data), sizeof(struct pia)); | |
394 | parport_put_port(this_port[i]); | |
395 | } | |
396 | } | |
397 | ||
398 | ||
399 | MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>"); | |
400 | MODULE_DESCRIPTION("Parport Driver for Multiface 3 expansion cards Paralllel Port"); | |
401 | MODULE_SUPPORTED_DEVICE("Multiface 3 Parallel Port"); | |
402 | MODULE_LICENSE("GPL"); | |
403 | ||
404 | module_init(parport_mfc3_init) | |
405 | module_exit(parport_mfc3_exit) |