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Linux 2.6.13-rc4
[linux-2.6/next.git] / arch / mips / vr41xx / common / vrc4173.c
blob5475dd72e2649becc41a73cd54718cb051946067
1 /*
2 * vrc4173.c, NEC VRC4173 base driver for NEC VR4122/VR4131.
3 *
4 * Copyright (C) 2001-2003 MontaVista Software Inc.
5 * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com>
6 * Copyright (C) 2004 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
7 * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/irq.h>
27 #include <linux/pci.h>
28 #include <linux/spinlock.h>
29 #include <linux/types.h>
30
31 #include <asm/vr41xx/vr41xx.h>
32 #include <asm/vr41xx/vrc4173.h>
33
34 MODULE_DESCRIPTION("NEC VRC4173 base driver for NEC VR4122/4131");
35 MODULE_AUTHOR("Yoichi Yuasa <yyuasa@mvista.com>");
36 MODULE_LICENSE("GPL");
37
38 #define VRC4173_CMUCLKMSK 0x040
39 #define MSKPIU 0x0001
40 #define MSKKIU 0x0002
41 #define MSKAIU 0x0004
42 #define MSKPS2CH1 0x0008
43 #define MSKPS2CH2 0x0010
44 #define MSKUSB 0x0020
45 #define MSKCARD1 0x0040
46 #define MSKCARD2 0x0080
47 #define MSKAC97 0x0100
48 #define MSK48MUSB 0x0400
49 #define MSK48MPIN 0x0800
50 #define MSK48MOSC 0x1000
51 #define VRC4173_CMUSRST 0x042
52 #define USBRST 0x0001
53 #define CARD1RST 0x0002
54 #define CARD2RST 0x0004
55 #define AC97RST 0x0008
56
57 #define VRC4173_SYSINT1REG 0x060
58 #define VRC4173_MSYSINT1REG 0x06c
59 #define VRC4173_MPIUINTREG 0x06e
60 #define VRC4173_MAIUINTREG 0x070
61 #define VRC4173_MKIUINTREG 0x072
62
63 #define VRC4173_SELECTREG 0x09e
64 #define SEL3 0x0008
65 #define SEL2 0x0004
66 #define SEL1 0x0002
67 #define SEL0 0x0001
68
69 static struct pci_device_id vrc4173_id_table[] __devinitdata = {
70 { .vendor = PCI_VENDOR_ID_NEC,
71 .device = PCI_DEVICE_ID_NEC_VRC4173,
72 .subvendor = PCI_ANY_ID,
73 .subdevice = PCI_ANY_ID, },
74 { .vendor = 0, },
75 };
76
77 unsigned long vrc4173_io_offset = 0;
78
79 EXPORT_SYMBOL(vrc4173_io_offset);
80
81 static int vrc4173_initialized;
82 static uint16_t vrc4173_cmuclkmsk;
83 static uint16_t vrc4173_selectreg;
84 static spinlock_t vrc4173_cmu_lock;
85 static spinlock_t vrc4173_giu_lock;
86
87 static inline void set_cmusrst(uint16_t val)
88 {
89 uint16_t cmusrst;
90
91 cmusrst = vrc4173_inw(VRC4173_CMUSRST);
92 cmusrst |= val;
93 vrc4173_outw(cmusrst, VRC4173_CMUSRST);
94 }
95
96 static inline void clear_cmusrst(uint16_t val)
97 {
98 uint16_t cmusrst;
99
100 cmusrst = vrc4173_inw(VRC4173_CMUSRST);
101 cmusrst &= ~val;
102 vrc4173_outw(cmusrst, VRC4173_CMUSRST);
103 }
104
105 void vrc4173_supply_clock(vrc4173_clock_t clock)
106 {
107 if (vrc4173_initialized) {
108 spin_lock_irq(&vrc4173_cmu_lock);
109
110 switch (clock) {
111 case VRC4173_PIU_CLOCK:
112 vrc4173_cmuclkmsk |= MSKPIU;
113 break;
114 case VRC4173_KIU_CLOCK:
115 vrc4173_cmuclkmsk |= MSKKIU;
116 break;
117 case VRC4173_AIU_CLOCK:
118 vrc4173_cmuclkmsk |= MSKAIU;
119 break;
120 case VRC4173_PS2_CH1_CLOCK:
121 vrc4173_cmuclkmsk |= MSKPS2CH1;
122 break;
123 case VRC4173_PS2_CH2_CLOCK:
124 vrc4173_cmuclkmsk |= MSKPS2CH2;
125 break;
126 case VRC4173_USBU_PCI_CLOCK:
127 set_cmusrst(USBRST);
128 vrc4173_cmuclkmsk |= MSKUSB;
129 break;
130 case VRC4173_CARDU1_PCI_CLOCK:
131 set_cmusrst(CARD1RST);
132 vrc4173_cmuclkmsk |= MSKCARD1;
133 break;
134 case VRC4173_CARDU2_PCI_CLOCK:
135 set_cmusrst(CARD2RST);
136 vrc4173_cmuclkmsk |= MSKCARD2;
137 break;
138 case VRC4173_AC97U_PCI_CLOCK:
139 set_cmusrst(AC97RST);
140 vrc4173_cmuclkmsk |= MSKAC97;
141 break;
142 case VRC4173_USBU_48MHz_CLOCK:
143 set_cmusrst(USBRST);
144 vrc4173_cmuclkmsk |= MSK48MUSB;
145 break;
146 case VRC4173_EXT_48MHz_CLOCK:
147 if (vrc4173_cmuclkmsk & MSK48MOSC)
148 vrc4173_cmuclkmsk |= MSK48MPIN;
149 else
150 printk(KERN_WARNING
151 "vrc4173_supply_clock: "
152 "Please supply VRC4173_48MHz_CLOCK first "
153 "rather than VRC4173_EXT_48MHz_CLOCK.\n");
154 break;
155 case VRC4173_48MHz_CLOCK:
156 vrc4173_cmuclkmsk |= MSK48MOSC;
157 break;
158 default:
159 printk(KERN_WARNING
160 "vrc4173_supply_clock: Invalid CLOCK value %u\n", clock);
161 break;
162 }
163
164 vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK);
165
166 switch (clock) {
167 case VRC4173_USBU_PCI_CLOCK:
168 case VRC4173_USBU_48MHz_CLOCK:
169 clear_cmusrst(USBRST);
170 break;
171 case VRC4173_CARDU1_PCI_CLOCK:
172 clear_cmusrst(CARD1RST);
173 break;
174 case VRC4173_CARDU2_PCI_CLOCK:
175 clear_cmusrst(CARD2RST);
176 break;
177 case VRC4173_AC97U_PCI_CLOCK:
178 clear_cmusrst(AC97RST);
179 break;
180 default:
181 break;
182 }
183
184 spin_unlock_irq(&vrc4173_cmu_lock);
185 }
186 }
187
188 EXPORT_SYMBOL(vrc4173_supply_clock);
189
190 void vrc4173_mask_clock(vrc4173_clock_t clock)
191 {
192 if (vrc4173_initialized) {
193 spin_lock_irq(&vrc4173_cmu_lock);
194
195 switch (clock) {
196 case VRC4173_PIU_CLOCK:
197 vrc4173_cmuclkmsk &= ~MSKPIU;
198 break;
199 case VRC4173_KIU_CLOCK:
200 vrc4173_cmuclkmsk &= ~MSKKIU;
201 break;
202 case VRC4173_AIU_CLOCK:
203 vrc4173_cmuclkmsk &= ~MSKAIU;
204 break;
205 case VRC4173_PS2_CH1_CLOCK:
206 vrc4173_cmuclkmsk &= ~MSKPS2CH1;
207 break;
208 case VRC4173_PS2_CH2_CLOCK:
209 vrc4173_cmuclkmsk &= ~MSKPS2CH2;
210 break;
211 case VRC4173_USBU_PCI_CLOCK:
212 set_cmusrst(USBRST);
213 vrc4173_cmuclkmsk &= ~MSKUSB;
214 break;
215 case VRC4173_CARDU1_PCI_CLOCK:
216 set_cmusrst(CARD1RST);
217 vrc4173_cmuclkmsk &= ~MSKCARD1;
218 break;
219 case VRC4173_CARDU2_PCI_CLOCK:
220 set_cmusrst(CARD2RST);
221 vrc4173_cmuclkmsk &= ~MSKCARD2;
222 break;
223 case VRC4173_AC97U_PCI_CLOCK:
224 set_cmusrst(AC97RST);
225 vrc4173_cmuclkmsk &= ~MSKAC97;
226 break;
227 case VRC4173_USBU_48MHz_CLOCK:
228 set_cmusrst(USBRST);
229 vrc4173_cmuclkmsk &= ~MSK48MUSB;
230 break;
231 case VRC4173_EXT_48MHz_CLOCK:
232 vrc4173_cmuclkmsk &= ~MSK48MPIN;
233 break;
234 case VRC4173_48MHz_CLOCK:
235 vrc4173_cmuclkmsk &= ~MSK48MOSC;
236 break;
237 default:
238 printk(KERN_WARNING "vrc4173_mask_clock: Invalid CLOCK value %u\n", clock);
239 break;
240 }
241
242 vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK);
243
244 switch (clock) {
245 case VRC4173_USBU_PCI_CLOCK:
246 case VRC4173_USBU_48MHz_CLOCK:
247 clear_cmusrst(USBRST);
248 break;
249 case VRC4173_CARDU1_PCI_CLOCK:
250 clear_cmusrst(CARD1RST);
251 break;
252 case VRC4173_CARDU2_PCI_CLOCK:
253 clear_cmusrst(CARD2RST);
254 break;
255 case VRC4173_AC97U_PCI_CLOCK:
256 clear_cmusrst(AC97RST);
257 break;
258 default:
259 break;
260 }
261
262 spin_unlock_irq(&vrc4173_cmu_lock);
263 }
264 }
265
266 EXPORT_SYMBOL(vrc4173_mask_clock);
267
268 static inline void vrc4173_cmu_init(void)
269 {
270 vrc4173_cmuclkmsk = vrc4173_inw(VRC4173_CMUCLKMSK);
271
272 spin_lock_init(&vrc4173_cmu_lock);
273 }
274
275 void vrc4173_select_function(vrc4173_function_t function)
276 {
277 if (vrc4173_initialized) {
278 spin_lock_irq(&vrc4173_giu_lock);
279
280 switch(function) {
281 case PS2_CHANNEL1:
282 vrc4173_selectreg |= SEL2;
283 break;
284 case PS2_CHANNEL2:
285 vrc4173_selectreg |= SEL1;
286 break;
287 case TOUCHPANEL:
288 vrc4173_selectreg &= SEL2 | SEL1 | SEL0;
289 break;
290 case KEYBOARD_8SCANLINES:
291 vrc4173_selectreg &= SEL3 | SEL2 | SEL1;
292 break;
293 case KEYBOARD_10SCANLINES:
294 vrc4173_selectreg &= SEL3 | SEL2;
295 break;
296 case KEYBOARD_12SCANLINES:
297 vrc4173_selectreg &= SEL3;
298 break;
299 case GPIO_0_15PINS:
300 vrc4173_selectreg |= SEL0;
301 break;
302 case GPIO_16_20PINS:
303 vrc4173_selectreg |= SEL3;
304 break;
305 }
306
307 vrc4173_outw(vrc4173_selectreg, VRC4173_SELECTREG);
308
309 spin_unlock_irq(&vrc4173_giu_lock);
310 }
311 }
312
313 EXPORT_SYMBOL(vrc4173_select_function);
314
315 static inline void vrc4173_giu_init(void)
316 {
317 vrc4173_selectreg = vrc4173_inw(VRC4173_SELECTREG);
318
319 spin_lock_init(&vrc4173_giu_lock);
320 }
321
322 void vrc4173_enable_piuint(uint16_t mask)
323 {
324 irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ;
325 unsigned long flags;
326 uint16_t val;
327
328 spin_lock_irqsave(&desc->lock, flags);
329 val = vrc4173_inw(VRC4173_MPIUINTREG);
330 val |= mask;
331 vrc4173_outw(val, VRC4173_MPIUINTREG);
332 spin_unlock_irqrestore(&desc->lock, flags);
333 }
334
335 EXPORT_SYMBOL(vrc4173_enable_piuint);
336
337 void vrc4173_disable_piuint(uint16_t mask)
338 {
339 irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ;
340 unsigned long flags;
341 uint16_t val;
342
343 spin_lock_irqsave(&desc->lock, flags);
344 val = vrc4173_inw(VRC4173_MPIUINTREG);
345 val &= ~mask;
346 vrc4173_outw(val, VRC4173_MPIUINTREG);
347 spin_unlock_irqrestore(&desc->lock, flags);
348 }
349
350 EXPORT_SYMBOL(vrc4173_disable_piuint);
351
352 void vrc4173_enable_aiuint(uint16_t mask)
353 {
354 irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ;
355 unsigned long flags;
356 uint16_t val;
357
358 spin_lock_irqsave(&desc->lock, flags);
359 val = vrc4173_inw(VRC4173_MAIUINTREG);
360 val |= mask;
361 vrc4173_outw(val, VRC4173_MAIUINTREG);
362 spin_unlock_irqrestore(&desc->lock, flags);
363 }
364
365 EXPORT_SYMBOL(vrc4173_enable_aiuint);
366
367 void vrc4173_disable_aiuint(uint16_t mask)
368 {
369 irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ;
370 unsigned long flags;
371 uint16_t val;
372
373 spin_lock_irqsave(&desc->lock, flags);
374 val = vrc4173_inw(VRC4173_MAIUINTREG);
375 val &= ~mask;
376 vrc4173_outw(val, VRC4173_MAIUINTREG);
377 spin_unlock_irqrestore(&desc->lock, flags);
378 }
379
380 EXPORT_SYMBOL(vrc4173_disable_aiuint);
381
382 void vrc4173_enable_kiuint(uint16_t mask)
383 {
384 irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ;
385 unsigned long flags;
386 uint16_t val;
387
388 spin_lock_irqsave(&desc->lock, flags);
389 val = vrc4173_inw(VRC4173_MKIUINTREG);
390 val |= mask;
391 vrc4173_outw(val, VRC4173_MKIUINTREG);
392 spin_unlock_irqrestore(&desc->lock, flags);
393 }
394
395 EXPORT_SYMBOL(vrc4173_enable_kiuint);
396
397 void vrc4173_disable_kiuint(uint16_t mask)
398 {
399 irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ;
400 unsigned long flags;
401 uint16_t val;
402
403 spin_lock_irqsave(&desc->lock, flags);
404 val = vrc4173_inw(VRC4173_MKIUINTREG);
405 val &= ~mask;
406 vrc4173_outw(val, VRC4173_MKIUINTREG);
407 spin_unlock_irqrestore(&desc->lock, flags);
408 }
409
410 EXPORT_SYMBOL(vrc4173_disable_kiuint);
411
412 static void enable_vrc4173_irq(unsigned int irq)
413 {
414 uint16_t val;
415
416 val = vrc4173_inw(VRC4173_MSYSINT1REG);
417 val |= (uint16_t)1 << (irq - VRC4173_IRQ_BASE);
418 vrc4173_outw(val, VRC4173_MSYSINT1REG);
419 }
420
421 static void disable_vrc4173_irq(unsigned int irq)
422 {
423 uint16_t val;
424
425 val = vrc4173_inw(VRC4173_MSYSINT1REG);
426 val &= ~((uint16_t)1 << (irq - VRC4173_IRQ_BASE));
427 vrc4173_outw(val, VRC4173_MSYSINT1REG);
428 }
429
430 static unsigned int startup_vrc4173_irq(unsigned int irq)
431 {
432 enable_vrc4173_irq(irq);
433 return 0; /* never anything pending */
434 }
435
436 #define shutdown_vrc4173_irq disable_vrc4173_irq
437 #define ack_vrc4173_irq disable_vrc4173_irq
438
439 static void end_vrc4173_irq(unsigned int irq)
440 {
441 if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
442 enable_vrc4173_irq(irq);
443 }
444
445 static struct hw_interrupt_type vrc4173_irq_type = {
446 .typename = "VRC4173",
447 .startup = startup_vrc4173_irq,
448 .shutdown = shutdown_vrc4173_irq,
449 .enable = enable_vrc4173_irq,
450 .disable = disable_vrc4173_irq,
451 .ack = ack_vrc4173_irq,
452 .end = end_vrc4173_irq,
453 };
454
455 static int vrc4173_get_irq_number(int irq)
456 {
457 uint16_t status, mask;
458 int i;
459
460 status = vrc4173_inw(VRC4173_SYSINT1REG);
461 mask = vrc4173_inw(VRC4173_MSYSINT1REG);
462
463 status &= mask;
464 if (status) {
465 for (i = 0; i < 16; i++)
466 if (status & (0x0001 << i))
467 return VRC4173_IRQ(i);
468 }
469
470 return -EINVAL;
471 }
472
473 static inline int vrc4173_icu_init(int cascade_irq)
474 {
475 int i;
476
477 if (cascade_irq < GIU_IRQ(0) || cascade_irq > GIU_IRQ(15))
478 return -EINVAL;
479
480 vrc4173_outw(0, VRC4173_MSYSINT1REG);
481
482 vr41xx_set_irq_trigger(GIU_IRQ_TO_PIN(cascade_irq), TRIGGER_LEVEL, SIGNAL_THROUGH);
483 vr41xx_set_irq_level(GIU_IRQ_TO_PIN(cascade_irq), LEVEL_LOW);
484
485 for (i = VRC4173_IRQ_BASE; i <= VRC4173_IRQ_LAST; i++)
486 irq_desc[i].handler = &vrc4173_irq_type;
487
488 return 0;
489 }
490
491 static int __devinit vrc4173_probe(struct pci_dev *dev,
492 const struct pci_device_id *id)
493 {
494 unsigned long start, flags;
495 int err;
496
497 err = pci_enable_device(dev);
498 if (err < 0) {
499 printk(KERN_ERR "vrc4173: Failed to enable PCI device, aborting\n");
500 return err;
501 }
502
503 pci_set_master(dev);
504
505 start = pci_resource_start(dev, 0);
506 if (start == 0) {
507 printk(KERN_ERR "vrc4173:No such PCI I/O resource, aborting\n");
508 return -ENXIO;
509 }
510
511 flags = pci_resource_flags(dev, 0);
512 if ((flags & IORESOURCE_IO) == 0) {
513 printk(KERN_ERR "vrc4173: No such PCI I/O resource, aborting\n");
514 return -ENXIO;
515 }
516
517 err = pci_request_regions(dev, "NEC VRC4173");
518 if (err < 0) {
519 printk(KERN_ERR "vrc4173: PCI resources are busy, aborting\n");
520 return err;
521 }
522
523 set_vrc4173_io_offset(start);
524
525 vrc4173_cmu_init();
526 vrc4173_giu_init();
527
528 err = vrc4173_icu_init(dev->irq);
529 if (err < 0) {
530 printk(KERN_ERR "vrc4173: Invalid IRQ %d, aborting\n", dev->irq);
531 return err;
532 }
533
534 err = vr41xx_cascade_irq(dev->irq, vrc4173_get_irq_number);
535 if (err < 0) {
536 printk(KERN_ERR "vrc4173: IRQ resource %d is busy, aborting\n", dev->irq);
537 return err;
538 }
539
540 printk(KERN_INFO
541 "NEC VRC4173 at 0x%#08lx, IRQ is cascaded to %d\n", start, dev->irq);
542
543 return 0;
544 }
545
546 static void vrc4173_remove(struct pci_dev *dev)
547 {
548 free_irq(dev->irq, NULL);
549
550 pci_release_regions(dev);
551 }
552
553 static struct pci_driver vrc4173_driver = {
554 .name = "NEC VRC4173",
555 .probe = vrc4173_probe,
556 .remove = vrc4173_remove,
557 .id_table = vrc4173_id_table,
558 };
559
560 static int __devinit vrc4173_init(void)
561 {
562 int err;
563
564 err = pci_module_init(&vrc4173_driver);
565 if (err < 0)
566 return err;
567
568 vrc4173_initialized = 1;
569
570 return 0;
571 }
572
573 static void __devexit vrc4173_exit(void)
574 {
575 vrc4173_initialized = 0;
576
577 pci_unregister_driver(&vrc4173_driver);
578 }
579
580 module_init(vrc4173_init);
581 module_exit(vrc4173_exit);
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