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Blackfin arch: fix bug - gpio_bank() macros messed up bank number caculating with...
[deliverable/linux.git] / arch / blackfin / mach-common / ints-priority.c
1 /*
2 * File: arch/blackfin/mach-common/ints-priority.c
3 * Based on:
4 * Author:
5 *
6 * Created: ?
7 * Description: Set up the interrupt priorities
8 *
9 * Modified:
10 * 1996 Roman Zippel
11 * 1999 D. Jeff Dionne <jeff@uclinux.org>
12 * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
13 * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
14 * 2003 Metrowerks/Motorola
15 * 2003 Bas Vermeulen <bas@buyways.nl>
16 * Copyright 2004-2008 Analog Devices Inc.
17 *
18 * Bugs: Enter bugs at http://blackfin.uclinux.org/
19 *
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, see the file COPYING, or write
32 * to the Free Software Foundation, Inc.,
33 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 */
35
36 #include <linux/module.h>
37 #include <linux/kernel_stat.h>
38 #include <linux/seq_file.h>
39 #include <linux/irq.h>
40 #ifdef CONFIG_KGDB
41 #include <linux/kgdb.h>
42 #endif
43 #include <asm/traps.h>
44 #include <asm/blackfin.h>
45 #include <asm/gpio.h>
46 #include <asm/irq_handler.h>
47
48 #ifdef BF537_FAMILY
49 # define BF537_GENERIC_ERROR_INT_DEMUX
50 #else
51 # undef BF537_GENERIC_ERROR_INT_DEMUX
52 #endif
53
54 /*
55 * NOTES:
56 * - we have separated the physical Hardware interrupt from the
57 * levels that the LINUX kernel sees (see the description in irq.h)
58 * -
59 */
60
61 /* Initialize this to an actual value to force it into the .data
62 * section so that we know it is properly initialized at entry into
63 * the kernel but before bss is initialized to zero (which is where
64 * it would live otherwise). The 0x1f magic represents the IRQs we
65 * cannot actually mask out in hardware.
66 */
67 unsigned long irq_flags = 0x1f;
68 EXPORT_SYMBOL(irq_flags);
69
70 /* The number of spurious interrupts */
71 atomic_t num_spurious;
72
73 #ifdef CONFIG_PM
74 unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */
75 unsigned vr_wakeup;
76 #endif
77
78 struct ivgx {
79 /* irq number for request_irq, available in mach-bf5xx/irq.h */
80 unsigned int irqno;
81 /* corresponding bit in the SIC_ISR register */
82 unsigned int isrflag;
83 } ivg_table[NR_PERI_INTS];
84
85 struct ivg_slice {
86 /* position of first irq in ivg_table for given ivg */
87 struct ivgx *ifirst;
88 struct ivgx *istop;
89 } ivg7_13[IVG13 - IVG7 + 1];
90
91
92 /*
93 * Search SIC_IAR and fill tables with the irqvalues
94 * and their positions in the SIC_ISR register.
95 */
96 static void __init search_IAR(void)
97 {
98 unsigned ivg, irq_pos = 0;
99 for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
100 int irqn;
101
102 ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
103
104 for (irqn = 0; irqn < NR_PERI_INTS; irqn++) {
105 int iar_shift = (irqn & 7) * 4;
106 if (ivg == (0xf &
107 #if defined(CONFIG_BF52x) || defined(CONFIG_BF538) \
108 || defined(CONFIG_BF539) || defined(CONFIG_BF51x)
109 bfin_read32((unsigned long *)SIC_IAR0 +
110 ((irqn % 32) >> 3) + ((irqn / 32) *
111 ((SIC_IAR4 - SIC_IAR0) / 4))) >> iar_shift)) {
112 #else
113 bfin_read32((unsigned long *)SIC_IAR0 +
114 (irqn >> 3)) >> iar_shift)) {
115 #endif
116 ivg_table[irq_pos].irqno = IVG7 + irqn;
117 ivg_table[irq_pos].isrflag = 1 << (irqn % 32);
118 ivg7_13[ivg].istop++;
119 irq_pos++;
120 }
121 }
122 }
123 }
124
125 /*
126 * This is for core internal IRQs
127 */
128
129 static void bfin_ack_noop(unsigned int irq)
130 {
131 /* Dummy function. */
132 }
133
134 static void bfin_core_mask_irq(unsigned int irq)
135 {
136 irq_flags &= ~(1 << irq);
137 if (!irqs_disabled())
138 local_irq_enable();
139 }
140
141 static void bfin_core_unmask_irq(unsigned int irq)
142 {
143 irq_flags |= 1 << irq;
144 /*
145 * If interrupts are enabled, IMASK must contain the same value
146 * as irq_flags. Make sure that invariant holds. If interrupts
147 * are currently disabled we need not do anything; one of the
148 * callers will take care of setting IMASK to the proper value
149 * when reenabling interrupts.
150 * local_irq_enable just does "STI irq_flags", so it's exactly
151 * what we need.
152 */
153 if (!irqs_disabled())
154 local_irq_enable();
155 return;
156 }
157
158 static void bfin_internal_mask_irq(unsigned int irq)
159 {
160 #ifdef CONFIG_BF53x
161 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
162 ~(1 << SIC_SYSIRQ(irq)));
163 #else
164 unsigned mask_bank, mask_bit;
165 mask_bank = SIC_SYSIRQ(irq) / 32;
166 mask_bit = SIC_SYSIRQ(irq) % 32;
167 bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
168 ~(1 << mask_bit));
169 #endif
170 SSYNC();
171 }
172
173 static void bfin_internal_unmask_irq(unsigned int irq)
174 {
175 #ifdef CONFIG_BF53x
176 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
177 (1 << SIC_SYSIRQ(irq)));
178 #else
179 unsigned mask_bank, mask_bit;
180 mask_bank = SIC_SYSIRQ(irq) / 32;
181 mask_bit = SIC_SYSIRQ(irq) % 32;
182 bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) |
183 (1 << mask_bit));
184 #endif
185 SSYNC();
186 }
187
188 #ifdef CONFIG_PM
189 int bfin_internal_set_wake(unsigned int irq, unsigned int state)
190 {
191 unsigned bank, bit, wakeup = 0;
192 unsigned long flags;
193 bank = SIC_SYSIRQ(irq) / 32;
194 bit = SIC_SYSIRQ(irq) % 32;
195
196 switch (irq) {
197 #ifdef IRQ_RTC
198 case IRQ_RTC:
199 wakeup |= WAKE;
200 break;
201 #endif
202 #ifdef IRQ_CAN0_RX
203 case IRQ_CAN0_RX:
204 wakeup |= CANWE;
205 break;
206 #endif
207 #ifdef IRQ_CAN1_RX
208 case IRQ_CAN1_RX:
209 wakeup |= CANWE;
210 break;
211 #endif
212 #ifdef IRQ_USB_INT0
213 case IRQ_USB_INT0:
214 wakeup |= USBWE;
215 break;
216 #endif
217 #ifdef IRQ_KEY
218 case IRQ_KEY:
219 wakeup |= KPADWE;
220 break;
221 #endif
222 #ifdef CONFIG_BF54x
223 case IRQ_CNT:
224 wakeup |= ROTWE;
225 break;
226 #endif
227 default:
228 break;
229 }
230
231 local_irq_save(flags);
232
233 if (state) {
234 bfin_sic_iwr[bank] |= (1 << bit);
235 vr_wakeup |= wakeup;
236
237 } else {
238 bfin_sic_iwr[bank] &= ~(1 << bit);
239 vr_wakeup &= ~wakeup;
240 }
241
242 local_irq_restore(flags);
243
244 return 0;
245 }
246 #endif
247
248 static struct irq_chip bfin_core_irqchip = {
249 .name = "CORE",
250 .ack = bfin_ack_noop,
251 .mask = bfin_core_mask_irq,
252 .unmask = bfin_core_unmask_irq,
253 };
254
255 static struct irq_chip bfin_internal_irqchip = {
256 .name = "INTN",
257 .ack = bfin_ack_noop,
258 .mask = bfin_internal_mask_irq,
259 .unmask = bfin_internal_unmask_irq,
260 .mask_ack = bfin_internal_mask_irq,
261 .disable = bfin_internal_mask_irq,
262 .enable = bfin_internal_unmask_irq,
263 #ifdef CONFIG_PM
264 .set_wake = bfin_internal_set_wake,
265 #endif
266 };
267
268 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
269 static int error_int_mask;
270
271 static void bfin_generic_error_mask_irq(unsigned int irq)
272 {
273 error_int_mask &= ~(1L << (irq - IRQ_PPI_ERROR));
274
275 if (!error_int_mask)
276 bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
277 }
278
279 static void bfin_generic_error_unmask_irq(unsigned int irq)
280 {
281 bfin_internal_unmask_irq(IRQ_GENERIC_ERROR);
282 error_int_mask |= 1L << (irq - IRQ_PPI_ERROR);
283 }
284
285 static struct irq_chip bfin_generic_error_irqchip = {
286 .name = "ERROR",
287 .ack = bfin_ack_noop,
288 .mask_ack = bfin_generic_error_mask_irq,
289 .mask = bfin_generic_error_mask_irq,
290 .unmask = bfin_generic_error_unmask_irq,
291 };
292
293 static void bfin_demux_error_irq(unsigned int int_err_irq,
294 struct irq_desc *inta_desc)
295 {
296 int irq = 0;
297
298 SSYNC();
299
300 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
301 if (bfin_read_EMAC_SYSTAT() & EMAC_ERR_MASK)
302 irq = IRQ_MAC_ERROR;
303 else
304 #endif
305 if (bfin_read_SPORT0_STAT() & SPORT_ERR_MASK)
306 irq = IRQ_SPORT0_ERROR;
307 else if (bfin_read_SPORT1_STAT() & SPORT_ERR_MASK)
308 irq = IRQ_SPORT1_ERROR;
309 else if (bfin_read_PPI_STATUS() & PPI_ERR_MASK)
310 irq = IRQ_PPI_ERROR;
311 else if (bfin_read_CAN_GIF() & CAN_ERR_MASK)
312 irq = IRQ_CAN_ERROR;
313 else if (bfin_read_SPI_STAT() & SPI_ERR_MASK)
314 irq = IRQ_SPI_ERROR;
315 else if ((bfin_read_UART0_IIR() & UART_ERR_MASK_STAT1) &&
316 (bfin_read_UART0_IIR() & UART_ERR_MASK_STAT0))
317 irq = IRQ_UART0_ERROR;
318 else if ((bfin_read_UART1_IIR() & UART_ERR_MASK_STAT1) &&
319 (bfin_read_UART1_IIR() & UART_ERR_MASK_STAT0))
320 irq = IRQ_UART1_ERROR;
321
322 if (irq) {
323 if (error_int_mask & (1L << (irq - IRQ_PPI_ERROR))) {
324 struct irq_desc *desc = irq_desc + irq;
325 desc->handle_irq(irq, desc);
326 } else {
327
328 switch (irq) {
329 case IRQ_PPI_ERROR:
330 bfin_write_PPI_STATUS(PPI_ERR_MASK);
331 break;
332 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
333 case IRQ_MAC_ERROR:
334 bfin_write_EMAC_SYSTAT(EMAC_ERR_MASK);
335 break;
336 #endif
337 case IRQ_SPORT0_ERROR:
338 bfin_write_SPORT0_STAT(SPORT_ERR_MASK);
339 break;
340
341 case IRQ_SPORT1_ERROR:
342 bfin_write_SPORT1_STAT(SPORT_ERR_MASK);
343 break;
344
345 case IRQ_CAN_ERROR:
346 bfin_write_CAN_GIS(CAN_ERR_MASK);
347 break;
348
349 case IRQ_SPI_ERROR:
350 bfin_write_SPI_STAT(SPI_ERR_MASK);
351 break;
352
353 default:
354 break;
355 }
356
357 pr_debug("IRQ %d:"
358 " MASKED PERIPHERAL ERROR INTERRUPT ASSERTED\n",
359 irq);
360 }
361 } else
362 printk(KERN_ERR
363 "%s : %s : LINE %d :\nIRQ ?: PERIPHERAL ERROR"
364 " INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
365 __func__, __FILE__, __LINE__);
366
367 }
368 #endif /* BF537_GENERIC_ERROR_INT_DEMUX */
369
370 static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle)
371 {
372 struct irq_desc *desc = irq_desc + irq;
373 /* May not call generic set_irq_handler() due to spinlock
374 recursion. */
375 desc->handle_irq = handle;
376 }
377
378 #if !defined(CONFIG_BF54x)
379
380 static unsigned short gpio_enabled[GPIO_BANK_NUM];
381 static unsigned short gpio_edge_triggered[GPIO_BANK_NUM];
382
383 extern void bfin_gpio_irq_prepare(unsigned gpio);
384
385 static void bfin_gpio_ack_irq(unsigned int irq)
386 {
387 u16 gpionr = irq - IRQ_PF0;
388
389 if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
390 set_gpio_data(gpionr, 0);
391 SSYNC();
392 }
393 }
394
395 static void bfin_gpio_mask_ack_irq(unsigned int irq)
396 {
397 u16 gpionr = irq - IRQ_PF0;
398
399 if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
400 set_gpio_data(gpionr, 0);
401 SSYNC();
402 }
403
404 set_gpio_maska(gpionr, 0);
405 SSYNC();
406 }
407
408 static void bfin_gpio_mask_irq(unsigned int irq)
409 {
410 set_gpio_maska(irq - IRQ_PF0, 0);
411 SSYNC();
412 }
413
414 static void bfin_gpio_unmask_irq(unsigned int irq)
415 {
416 set_gpio_maska(irq - IRQ_PF0, 1);
417 SSYNC();
418 }
419
420 static unsigned int bfin_gpio_irq_startup(unsigned int irq)
421 {
422 u16 gpionr = irq - IRQ_PF0;
423
424 if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
425 bfin_gpio_irq_prepare(gpionr);
426
427 gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
428 bfin_gpio_unmask_irq(irq);
429
430 return 0;
431 }
432
433 static void bfin_gpio_irq_shutdown(unsigned int irq)
434 {
435 bfin_gpio_mask_irq(irq);
436 gpio_enabled[gpio_bank(irq - IRQ_PF0)] &= ~gpio_bit(irq - IRQ_PF0);
437 }
438
439 static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
440 {
441 u16 gpionr = irq - IRQ_PF0;
442
443 if (type == IRQ_TYPE_PROBE) {
444 /* only probe unenabled GPIO interrupt lines */
445 if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
446 return 0;
447 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
448 }
449
450 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
451 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
452 if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
453 bfin_gpio_irq_prepare(gpionr);
454
455 gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
456 } else {
457 gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
458 return 0;
459 }
460
461 set_gpio_inen(gpionr, 0);
462 set_gpio_dir(gpionr, 0);
463
464 if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
465 == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
466 set_gpio_both(gpionr, 1);
467 else
468 set_gpio_both(gpionr, 0);
469
470 if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
471 set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */
472 else
473 set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */
474
475 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
476 set_gpio_edge(gpionr, 1);
477 set_gpio_inen(gpionr, 1);
478 gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
479 set_gpio_data(gpionr, 0);
480
481 } else {
482 set_gpio_edge(gpionr, 0);
483 gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
484 set_gpio_inen(gpionr, 1);
485 }
486
487 SSYNC();
488
489 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
490 bfin_set_irq_handler(irq, handle_edge_irq);
491 else
492 bfin_set_irq_handler(irq, handle_level_irq);
493
494 return 0;
495 }
496
497 #ifdef CONFIG_PM
498 int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
499 {
500 unsigned gpio = irq_to_gpio(irq);
501
502 if (state)
503 gpio_pm_wakeup_request(gpio, PM_WAKE_IGNORE);
504 else
505 gpio_pm_wakeup_free(gpio);
506
507 return 0;
508 }
509 #endif
510
511 static struct irq_chip bfin_gpio_irqchip = {
512 .name = "GPIO",
513 .ack = bfin_gpio_ack_irq,
514 .mask = bfin_gpio_mask_irq,
515 .mask_ack = bfin_gpio_mask_ack_irq,
516 .unmask = bfin_gpio_unmask_irq,
517 .disable = bfin_gpio_mask_irq,
518 .enable = bfin_gpio_unmask_irq,
519 .set_type = bfin_gpio_irq_type,
520 .startup = bfin_gpio_irq_startup,
521 .shutdown = bfin_gpio_irq_shutdown,
522 #ifdef CONFIG_PM
523 .set_wake = bfin_gpio_set_wake,
524 #endif
525 };
526
527 static void bfin_demux_gpio_irq(unsigned int inta_irq,
528 struct irq_desc *desc)
529 {
530 unsigned int i, gpio, mask, irq, search = 0;
531
532 switch (inta_irq) {
533 #if defined(CONFIG_BF53x)
534 case IRQ_PROG_INTA:
535 irq = IRQ_PF0;
536 search = 1;
537 break;
538 # if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
539 case IRQ_MAC_RX:
540 irq = IRQ_PH0;
541 break;
542 # endif
543 #elif defined(CONFIG_BF538) || defined(CONFIG_BF539)
544 case IRQ_PORTF_INTA:
545 irq = IRQ_PF0;
546 break;
547 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
548 case IRQ_PORTF_INTA:
549 irq = IRQ_PF0;
550 break;
551 case IRQ_PORTG_INTA:
552 irq = IRQ_PG0;
553 break;
554 case IRQ_PORTH_INTA:
555 irq = IRQ_PH0;
556 break;
557 #elif defined(CONFIG_BF561)
558 case IRQ_PROG0_INTA:
559 irq = IRQ_PF0;
560 break;
561 case IRQ_PROG1_INTA:
562 irq = IRQ_PF16;
563 break;
564 case IRQ_PROG2_INTA:
565 irq = IRQ_PF32;
566 break;
567 #endif
568 default:
569 BUG();
570 return;
571 }
572
573 if (search) {
574 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
575 irq += i;
576
577 mask = get_gpiop_data(i) &
578 (gpio_enabled[gpio_bank(i)] &
579 get_gpiop_maska(i));
580
581 while (mask) {
582 if (mask & 1) {
583 desc = irq_desc + irq;
584 desc->handle_irq(irq, desc);
585 }
586 irq++;
587 mask >>= 1;
588 }
589 }
590 } else {
591 gpio = irq_to_gpio(irq);
592 mask = get_gpiop_data(gpio) &
593 (gpio_enabled[gpio_bank(gpio)] &
594 get_gpiop_maska(gpio));
595
596 do {
597 if (mask & 1) {
598 desc = irq_desc + irq;
599 desc->handle_irq(irq, desc);
600 }
601 irq++;
602 mask >>= 1;
603 } while (mask);
604 }
605
606 }
607
608 #else /* CONFIG_BF54x */
609
610 #define NR_PINT_SYS_IRQS 4
611 #define NR_PINT_BITS 32
612 #define NR_PINTS 160
613 #define IRQ_NOT_AVAIL 0xFF
614
615 #define PINT_2_BANK(x) ((x) >> 5)
616 #define PINT_2_BIT(x) ((x) & 0x1F)
617 #define PINT_BIT(x) (1 << (PINT_2_BIT(x)))
618
619 static unsigned char irq2pint_lut[NR_PINTS];
620 static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS];
621
622 static unsigned int gpio_both_edge_triggered[NR_PINT_SYS_IRQS];
623 static unsigned short gpio_enabled[GPIO_BANK_NUM];
624
625
626 struct pin_int_t {
627 unsigned int mask_set;
628 unsigned int mask_clear;
629 unsigned int request;
630 unsigned int assign;
631 unsigned int edge_set;
632 unsigned int edge_clear;
633 unsigned int invert_set;
634 unsigned int invert_clear;
635 unsigned int pinstate;
636 unsigned int latch;
637 };
638
639 static struct pin_int_t *pint[NR_PINT_SYS_IRQS] = {
640 (struct pin_int_t *)PINT0_MASK_SET,
641 (struct pin_int_t *)PINT1_MASK_SET,
642 (struct pin_int_t *)PINT2_MASK_SET,
643 (struct pin_int_t *)PINT3_MASK_SET,
644 };
645
646 extern void bfin_gpio_irq_prepare(unsigned gpio);
647
648 inline unsigned short get_irq_base(u8 bank, u8 bmap)
649 {
650
651 u16 irq_base;
652
653 if (bank < 2) { /*PA-PB */
654 irq_base = IRQ_PA0 + bmap * 16;
655 } else { /*PC-PJ */
656 irq_base = IRQ_PC0 + bmap * 16;
657 }
658
659 return irq_base;
660
661 }
662
663 /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
664 void init_pint_lut(void)
665 {
666 u16 bank, bit, irq_base, bit_pos;
667 u32 pint_assign;
668 u8 bmap;
669
670 memset(irq2pint_lut, IRQ_NOT_AVAIL, sizeof(irq2pint_lut));
671
672 for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) {
673
674 pint_assign = pint[bank]->assign;
675
676 for (bit = 0; bit < NR_PINT_BITS; bit++) {
677
678 bmap = (pint_assign >> ((bit / 8) * 8)) & 0xFF;
679
680 irq_base = get_irq_base(bank, bmap);
681
682 irq_base += (bit % 8) + ((bit / 8) & 1 ? 8 : 0);
683 bit_pos = bit + bank * NR_PINT_BITS;
684
685 pint2irq_lut[bit_pos] = irq_base - SYS_IRQS;
686 irq2pint_lut[irq_base - SYS_IRQS] = bit_pos;
687
688 }
689
690 }
691
692 }
693
694 static void bfin_gpio_ack_irq(unsigned int irq)
695 {
696 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
697 u32 pintbit = PINT_BIT(pint_val);
698 u8 bank = PINT_2_BANK(pint_val);
699
700 if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
701 if (pint[bank]->invert_set & pintbit)
702 pint[bank]->invert_clear = pintbit;
703 else
704 pint[bank]->invert_set = pintbit;
705 }
706 pint[bank]->request = pintbit;
707
708 SSYNC();
709 }
710
711 static void bfin_gpio_mask_ack_irq(unsigned int irq)
712 {
713 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
714 u32 pintbit = PINT_BIT(pint_val);
715 u8 bank = PINT_2_BANK(pint_val);
716
717 if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
718 if (pint[bank]->invert_set & pintbit)
719 pint[bank]->invert_clear = pintbit;
720 else
721 pint[bank]->invert_set = pintbit;
722 }
723
724 pint[bank]->request = pintbit;
725 pint[bank]->mask_clear = pintbit;
726 SSYNC();
727 }
728
729 static void bfin_gpio_mask_irq(unsigned int irq)
730 {
731 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
732
733 pint[PINT_2_BANK(pint_val)]->mask_clear = PINT_BIT(pint_val);
734 SSYNC();
735 }
736
737 static void bfin_gpio_unmask_irq(unsigned int irq)
738 {
739 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
740 u32 pintbit = PINT_BIT(pint_val);
741 u8 bank = PINT_2_BANK(pint_val);
742
743 pint[bank]->request = pintbit;
744 pint[bank]->mask_set = pintbit;
745 SSYNC();
746 }
747
748 static unsigned int bfin_gpio_irq_startup(unsigned int irq)
749 {
750 u16 gpionr = irq_to_gpio(irq);
751 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
752
753 if (pint_val == IRQ_NOT_AVAIL) {
754 printk(KERN_ERR
755 "GPIO IRQ %d :Not in PINT Assign table "
756 "Reconfigure Interrupt to Port Assignemt\n", irq);
757 return -ENODEV;
758 }
759
760 if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
761 bfin_gpio_irq_prepare(gpionr);
762
763 gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
764 bfin_gpio_unmask_irq(irq);
765
766 return 0;
767 }
768
769 static void bfin_gpio_irq_shutdown(unsigned int irq)
770 {
771 u16 gpionr = irq_to_gpio(irq);
772
773 bfin_gpio_mask_irq(irq);
774 gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
775 }
776
777 static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
778 {
779
780 u16 gpionr = irq_to_gpio(irq);
781 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
782 u32 pintbit = PINT_BIT(pint_val);
783 u8 bank = PINT_2_BANK(pint_val);
784
785 if (pint_val == IRQ_NOT_AVAIL)
786 return -ENODEV;
787
788 if (type == IRQ_TYPE_PROBE) {
789 /* only probe unenabled GPIO interrupt lines */
790 if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
791 return 0;
792 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
793 }
794
795 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
796 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
797 if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
798 bfin_gpio_irq_prepare(gpionr);
799
800 gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
801 } else {
802 gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
803 return 0;
804 }
805
806 if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
807 pint[bank]->invert_set = pintbit; /* low or falling edge denoted by one */
808 else
809 pint[bank]->invert_clear = pintbit; /* high or rising edge denoted by zero */
810
811 if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
812 == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
813
814 gpio_both_edge_triggered[bank] |= pintbit;
815
816 if (gpio_get_value(gpionr))
817 pint[bank]->invert_set = pintbit;
818 else
819 pint[bank]->invert_clear = pintbit;
820 } else {
821 gpio_both_edge_triggered[bank] &= ~pintbit;
822 }
823
824 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
825 pint[bank]->edge_set = pintbit;
826 bfin_set_irq_handler(irq, handle_edge_irq);
827 } else {
828 pint[bank]->edge_clear = pintbit;
829 bfin_set_irq_handler(irq, handle_level_irq);
830 }
831
832 SSYNC();
833
834 return 0;
835 }
836
837 #ifdef CONFIG_PM
838 u32 pint_saved_masks[NR_PINT_SYS_IRQS];
839 u32 pint_wakeup_masks[NR_PINT_SYS_IRQS];
840
841 int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
842 {
843 u32 pint_irq;
844 u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
845 u32 bank = PINT_2_BANK(pint_val);
846 u32 pintbit = PINT_BIT(pint_val);
847
848 switch (bank) {
849 case 0:
850 pint_irq = IRQ_PINT0;
851 break;
852 case 2:
853 pint_irq = IRQ_PINT2;
854 break;
855 case 3:
856 pint_irq = IRQ_PINT3;
857 break;
858 case 1:
859 pint_irq = IRQ_PINT1;
860 break;
861 default:
862 return -EINVAL;
863 }
864
865 bfin_internal_set_wake(pint_irq, state);
866
867 if (state)
868 pint_wakeup_masks[bank] |= pintbit;
869 else
870 pint_wakeup_masks[bank] &= ~pintbit;
871
872 return 0;
873 }
874
875 u32 bfin_pm_setup(void)
876 {
877 u32 val, i;
878
879 for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
880 val = pint[i]->mask_clear;
881 pint_saved_masks[i] = val;
882 if (val ^ pint_wakeup_masks[i]) {
883 pint[i]->mask_clear = val;
884 pint[i]->mask_set = pint_wakeup_masks[i];
885 }
886 }
887
888 return 0;
889 }
890
891 void bfin_pm_restore(void)
892 {
893 u32 i, val;
894
895 for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
896 val = pint_saved_masks[i];
897 if (val ^ pint_wakeup_masks[i]) {
898 pint[i]->mask_clear = pint[i]->mask_clear;
899 pint[i]->mask_set = val;
900 }
901 }
902 }
903 #endif
904
905 static struct irq_chip bfin_gpio_irqchip = {
906 .name = "GPIO",
907 .ack = bfin_gpio_ack_irq,
908 .mask = bfin_gpio_mask_irq,
909 .mask_ack = bfin_gpio_mask_ack_irq,
910 .unmask = bfin_gpio_unmask_irq,
911 .disable = bfin_gpio_mask_irq,
912 .enable = bfin_gpio_unmask_irq,
913 .set_type = bfin_gpio_irq_type,
914 .startup = bfin_gpio_irq_startup,
915 .shutdown = bfin_gpio_irq_shutdown,
916 #ifdef CONFIG_PM
917 .set_wake = bfin_gpio_set_wake,
918 #endif
919 };
920
921 static void bfin_demux_gpio_irq(unsigned int inta_irq,
922 struct irq_desc *desc)
923 {
924 u8 bank, pint_val;
925 u32 request, irq;
926
927 switch (inta_irq) {
928 case IRQ_PINT0:
929 bank = 0;
930 break;
931 case IRQ_PINT2:
932 bank = 2;
933 break;
934 case IRQ_PINT3:
935 bank = 3;
936 break;
937 case IRQ_PINT1:
938 bank = 1;
939 break;
940 default:
941 return;
942 }
943
944 pint_val = bank * NR_PINT_BITS;
945
946 request = pint[bank]->request;
947
948 while (request) {
949 if (request & 1) {
950 irq = pint2irq_lut[pint_val] + SYS_IRQS;
951 desc = irq_desc + irq;
952 desc->handle_irq(irq, desc);
953 }
954 pint_val++;
955 request >>= 1;
956 }
957
958 }
959 #endif
960
961 void __init init_exception_vectors(void)
962 {
963 SSYNC();
964
965 /* cannot program in software:
966 * evt0 - emulation (jtag)
967 * evt1 - reset
968 */
969 bfin_write_EVT2(evt_nmi);
970 bfin_write_EVT3(trap);
971 bfin_write_EVT5(evt_ivhw);
972 bfin_write_EVT6(evt_timer);
973 bfin_write_EVT7(evt_evt7);
974 bfin_write_EVT8(evt_evt8);
975 bfin_write_EVT9(evt_evt9);
976 bfin_write_EVT10(evt_evt10);
977 bfin_write_EVT11(evt_evt11);
978 bfin_write_EVT12(evt_evt12);
979 bfin_write_EVT13(evt_evt13);
980 bfin_write_EVT14(evt14_softirq);
981 bfin_write_EVT15(evt_system_call);
982 CSYNC();
983 }
984
985 /*
986 * This function should be called during kernel startup to initialize
987 * the BFin IRQ handling routines.
988 */
989 int __init init_arch_irq(void)
990 {
991 int irq;
992 unsigned long ilat = 0;
993 /* Disable all the peripheral intrs - page 4-29 HW Ref manual */
994 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561) \
995 || defined(BF538_FAMILY) || defined(CONFIG_BF51x)
996 bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
997 bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
998 # ifdef CONFIG_BF54x
999 bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
1000 # endif
1001 #else
1002 bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
1003 #endif
1004
1005 local_irq_disable();
1006
1007 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
1008 /* Clear EMAC Interrupt Status bits so we can demux it later */
1009 bfin_write_EMAC_SYSTAT(-1);
1010 #endif
1011
1012 #ifdef CONFIG_BF54x
1013 # ifdef CONFIG_PINTx_REASSIGN
1014 pint[0]->assign = CONFIG_PINT0_ASSIGN;
1015 pint[1]->assign = CONFIG_PINT1_ASSIGN;
1016 pint[2]->assign = CONFIG_PINT2_ASSIGN;
1017 pint[3]->assign = CONFIG_PINT3_ASSIGN;
1018 # endif
1019 /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
1020 init_pint_lut();
1021 #endif
1022
1023 for (irq = 0; irq <= SYS_IRQS; irq++) {
1024 if (irq <= IRQ_CORETMR)
1025 set_irq_chip(irq, &bfin_core_irqchip);
1026 else
1027 set_irq_chip(irq, &bfin_internal_irqchip);
1028
1029 switch (irq) {
1030 #if defined(CONFIG_BF53x)
1031 case IRQ_PROG_INTA:
1032 # if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
1033 case IRQ_MAC_RX:
1034 # endif
1035 #elif defined(CONFIG_BF54x)
1036 case IRQ_PINT0:
1037 case IRQ_PINT1:
1038 case IRQ_PINT2:
1039 case IRQ_PINT3:
1040 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
1041 case IRQ_PORTF_INTA:
1042 case IRQ_PORTG_INTA:
1043 case IRQ_PORTH_INTA:
1044 #elif defined(CONFIG_BF561)
1045 case IRQ_PROG0_INTA:
1046 case IRQ_PROG1_INTA:
1047 case IRQ_PROG2_INTA:
1048 #elif defined(CONFIG_BF538) || defined(CONFIG_BF539)
1049 case IRQ_PORTF_INTA:
1050 #endif
1051
1052 set_irq_chained_handler(irq,
1053 bfin_demux_gpio_irq);
1054 break;
1055 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
1056 case IRQ_GENERIC_ERROR:
1057 set_irq_handler(irq, bfin_demux_error_irq);
1058
1059 break;
1060 #endif
1061 default:
1062 set_irq_handler(irq, handle_simple_irq);
1063 break;
1064 }
1065 }
1066
1067 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
1068 for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
1069 set_irq_chip_and_handler(irq, &bfin_generic_error_irqchip,
1070 handle_level_irq);
1071 #endif
1072
1073 /* if configured as edge, then will be changed to do_edge_IRQ */
1074 for (irq = GPIO_IRQ_BASE; irq < NR_IRQS; irq++)
1075 set_irq_chip_and_handler(irq, &bfin_gpio_irqchip,
1076 handle_level_irq);
1077
1078
1079 bfin_write_IMASK(0);
1080 CSYNC();
1081 ilat = bfin_read_ILAT();
1082 CSYNC();
1083 bfin_write_ILAT(ilat);
1084 CSYNC();
1085
1086 printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
1087 /* IMASK=xxx is equivalent to STI xx or irq_flags=xx,
1088 * local_irq_enable()
1089 */
1090 program_IAR();
1091 /* Therefore it's better to setup IARs before interrupts enabled */
1092 search_IAR();
1093
1094 /* Enable interrupts IVG7-15 */
1095 irq_flags = irq_flags | IMASK_IVG15 |
1096 IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
1097 IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
1098
1099 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561) \
1100 || defined(BF538_FAMILY) || defined(CONFIG_BF51x)
1101 bfin_write_SIC_IWR0(IWR_DISABLE_ALL);
1102 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
1103 /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which
1104 * will screw up the bootrom as it relies on MDMA0/1 waking it
1105 * up from IDLE instructions. See this report for more info:
1106 * http://blackfin.uclinux.org/gf/tracker/4323
1107 */
1108 bfin_write_SIC_IWR1(IWR_ENABLE(10) | IWR_ENABLE(11));
1109 #else
1110 bfin_write_SIC_IWR1(IWR_DISABLE_ALL);
1111 #endif
1112 # ifdef CONFIG_BF54x
1113 bfin_write_SIC_IWR2(IWR_DISABLE_ALL);
1114 # endif
1115 #else
1116 bfin_write_SIC_IWR(IWR_DISABLE_ALL);
1117 #endif
1118
1119 return 0;
1120 }
1121
1122 #ifdef CONFIG_DO_IRQ_L1
1123 __attribute__((l1_text))
1124 #endif
1125 void do_irq(int vec, struct pt_regs *fp)
1126 {
1127 if (vec == EVT_IVTMR_P) {
1128 vec = IRQ_CORETMR;
1129 } else {
1130 struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
1131 struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
1132 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561) \
1133 || defined(BF538_FAMILY) || defined(CONFIG_BF51x)
1134 unsigned long sic_status[3];
1135
1136 sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
1137 sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
1138 #ifdef CONFIG_BF54x
1139 sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
1140 #endif
1141 for (;; ivg++) {
1142 if (ivg >= ivg_stop) {
1143 atomic_inc(&num_spurious);
1144 return;
1145 }
1146 if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
1147 break;
1148 }
1149 #else
1150 unsigned long sic_status;
1151
1152 sic_status = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
1153
1154 for (;; ivg++) {
1155 if (ivg >= ivg_stop) {
1156 atomic_inc(&num_spurious);
1157 return;
1158 } else if (sic_status & ivg->isrflag)
1159 break;
1160 }
1161 #endif
1162 vec = ivg->irqno;
1163 }
1164 asm_do_IRQ(vec, fp);
1165 }
Linux kernel - Deliverables
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