2 * Set up the interrupt priorities
4 * Copyright 2004-2009 Analog Devices Inc.
5 * 2003 Bas Vermeulen <bas@buyways.nl>
6 * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
7 * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
8 * 1999 D. Jeff Dionne <jeff@uclinux.org>
11 * Licensed under the GPL-2
14 #include <linux/module.h>
15 #include <linux/kernel_stat.h>
16 #include <linux/seq_file.h>
17 #include <linux/irq.h>
19 #include <linux/ipipe.h>
22 #include <linux/kgdb.h>
24 #include <asm/traps.h>
25 #include <asm/blackfin.h>
27 #include <asm/irq_handler.h>
29 #include <asm/bfin5xx_spi.h>
30 #include <asm/bfin_sport.h>
31 #include <asm/bfin_can.h>
33 #define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1))
36 # define BF537_GENERIC_ERROR_INT_DEMUX
37 # define SPI_ERR_MASK (BIT_STAT_TXCOL | BIT_STAT_RBSY | BIT_STAT_MODF | BIT_STAT_TXE) /* SPI_STAT */
38 # define SPORT_ERR_MASK (ROVF | RUVF | TOVF | TUVF) /* SPORT_STAT */
39 # define PPI_ERR_MASK (0xFFFF & ~FLD) /* PPI_STATUS */
40 # define EMAC_ERR_MASK (PHYINT | MMCINT | RXFSINT | TXFSINT | WAKEDET | RXDMAERR | TXDMAERR | STMDONE) /* EMAC_SYSTAT */
41 # define UART_ERR_MASK (0x6) /* UART_IIR */
42 # define CAN_ERR_MASK (EWTIF | EWRIF | EPIF | BOIF | WUIF | UIAIF | AAIF | RMLIF | UCEIF | EXTIF | ADIF) /* CAN_GIF */
44 # undef BF537_GENERIC_ERROR_INT_DEMUX
49 * - we have separated the physical Hardware interrupt from the
50 * levels that the LINUX kernel sees (see the description in irq.h)
55 /* Initialize this to an actual value to force it into the .data
56 * section so that we know it is properly initialized at entry into
57 * the kernel but before bss is initialized to zero (which is where
58 * it would live otherwise). The 0x1f magic represents the IRQs we
59 * cannot actually mask out in hardware.
61 unsigned long bfin_irq_flags = 0x1f;
62 EXPORT_SYMBOL(bfin_irq_flags);
65 /* The number of spurious interrupts */
66 atomic_t num_spurious;
69 unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */
74 /* irq number for request_irq, available in mach-bf5xx/irq.h */
76 /* corresponding bit in the SIC_ISR register */
78 } ivg_table[NR_PERI_INTS];
81 /* position of first irq in ivg_table for given ivg */
84 } ivg7_13[IVG13 - IVG7 + 1];
88 * Search SIC_IAR and fill tables with the irqvalues
89 * and their positions in the SIC_ISR register.
91 static void __init search_IAR(void)
93 unsigned ivg, irq_pos = 0;
94 for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
97 ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
99 for (irqN = 0; irqN < NR_PERI_INTS; irqN += 4) {
101 u32 iar = bfin_read32((unsigned long *)SIC_IAR0 +
102 #if defined(CONFIG_BF51x) || defined(CONFIG_BF52x) || \
103 defined(CONFIG_BF538) || defined(CONFIG_BF539)
104 ((irqN % 32) >> 3) + ((irqN / 32) * ((SIC_IAR4 - SIC_IAR0) / 4))
110 for (irqn = irqN; irqn < irqN + 4; ++irqn) {
111 int iar_shift = (irqn & 7) * 4;
112 if (ivg == (0xf & (iar >> iar_shift))) {
113 ivg_table[irq_pos].irqno = IVG7 + irqn;
114 ivg_table[irq_pos].isrflag = 1 << (irqn % 32);
115 ivg7_13[ivg].istop++;
124 * This is for core internal IRQs
127 static void bfin_ack_noop(struct irq_data *d)
129 /* Dummy function. */
132 static void bfin_core_mask_irq(struct irq_data *d)
134 bfin_irq_flags &= ~(1 << d->irq);
135 if (!hard_irqs_disabled())
136 hard_local_irq_enable();
139 static void bfin_core_unmask_irq(struct irq_data *d)
141 bfin_irq_flags |= 1 << d->irq;
143 * If interrupts are enabled, IMASK must contain the same value
144 * as bfin_irq_flags. Make sure that invariant holds. If interrupts
145 * are currently disabled we need not do anything; one of the
146 * callers will take care of setting IMASK to the proper value
147 * when reenabling interrupts.
148 * local_irq_enable just does "STI bfin_irq_flags", so it's exactly
151 if (!hard_irqs_disabled())
152 hard_local_irq_enable();
156 static void bfin_internal_mask_irq(unsigned int irq)
161 flags = hard_local_irq_save();
162 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
163 ~(1 << SIC_SYSIRQ(irq)));
165 unsigned mask_bank, mask_bit;
166 flags = hard_local_irq_save();
167 mask_bank = SIC_SYSIRQ(irq) / 32;
168 mask_bit = SIC_SYSIRQ(irq) % 32;
169 bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
172 bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) &
176 hard_local_irq_restore(flags);
179 static void bfin_internal_mask_irq_chip(struct irq_data *d)
181 bfin_internal_mask_irq(d->irq);
185 static void bfin_internal_unmask_irq_affinity(unsigned int irq,
186 const struct cpumask *affinity)
188 static void bfin_internal_unmask_irq(unsigned int irq)
194 flags = hard_local_irq_save();
195 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
196 (1 << SIC_SYSIRQ(irq)));
198 unsigned mask_bank, mask_bit;
199 flags = hard_local_irq_save();
200 mask_bank = SIC_SYSIRQ(irq) / 32;
201 mask_bit = SIC_SYSIRQ(irq) % 32;
203 if (cpumask_test_cpu(0, affinity))
205 bfin_write_SIC_IMASK(mask_bank,
206 bfin_read_SIC_IMASK(mask_bank) |
209 if (cpumask_test_cpu(1, affinity))
210 bfin_write_SICB_IMASK(mask_bank,
211 bfin_read_SICB_IMASK(mask_bank) |
215 hard_local_irq_restore(flags);
219 static void bfin_internal_unmask_irq_chip(struct irq_data *d)
221 bfin_internal_unmask_irq_affinity(d->irq, d->affinity);
224 static int bfin_internal_set_affinity(struct irq_data *d,
225 const struct cpumask *mask, bool force)
227 bfin_internal_mask_irq(d->irq);
228 bfin_internal_unmask_irq_affinity(d->irq, mask);
233 static void bfin_internal_unmask_irq_chip(struct irq_data *d)
235 bfin_internal_unmask_irq(d->irq);
240 int bfin_internal_set_wake(unsigned int irq, unsigned int state)
242 u32 bank, bit, wakeup = 0;
244 bank = SIC_SYSIRQ(irq) / 32;
245 bit = SIC_SYSIRQ(irq) % 32;
277 flags = hard_local_irq_save();
280 bfin_sic_iwr[bank] |= (1 << bit);
284 bfin_sic_iwr[bank] &= ~(1 << bit);
285 vr_wakeup &= ~wakeup;
288 hard_local_irq_restore(flags);
293 static int bfin_internal_set_wake_chip(struct irq_data *d, unsigned int state)
295 return bfin_internal_set_wake(d->irq, state);
299 static struct irq_chip bfin_core_irqchip = {
301 .irq_ack = bfin_ack_noop,
302 .irq_mask = bfin_core_mask_irq,
303 .irq_unmask = bfin_core_unmask_irq,
306 static struct irq_chip bfin_internal_irqchip = {
308 .irq_ack = bfin_ack_noop,
309 .irq_mask = bfin_internal_mask_irq_chip,
310 .irq_unmask = bfin_internal_unmask_irq_chip,
311 .irq_mask_ack = bfin_internal_mask_irq_chip,
312 .irq_disable = bfin_internal_mask_irq_chip,
313 .irq_enable = bfin_internal_unmask_irq_chip,
315 .irq_set_affinity = bfin_internal_set_affinity,
318 .irq_set_wake = bfin_internal_set_wake_chip,
322 static void bfin_handle_irq(unsigned irq)
325 struct pt_regs regs; /* Contents not used. */
326 ipipe_trace_irq_entry(irq);
327 __ipipe_handle_irq(irq, ®s);
328 ipipe_trace_irq_exit(irq);
329 #else /* !CONFIG_IPIPE */
330 generic_handle_irq(irq);
331 #endif /* !CONFIG_IPIPE */
334 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
335 static int error_int_mask;
337 static void bfin_generic_error_mask_irq(struct irq_data *d)
339 error_int_mask &= ~(1L << (d->irq - IRQ_PPI_ERROR));
341 bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
344 static void bfin_generic_error_unmask_irq(struct irq_data *d)
346 bfin_internal_unmask_irq(IRQ_GENERIC_ERROR);
347 error_int_mask |= 1L << (d->irq - IRQ_PPI_ERROR);
350 static struct irq_chip bfin_generic_error_irqchip = {
352 .irq_ack = bfin_ack_noop,
353 .irq_mask_ack = bfin_generic_error_mask_irq,
354 .irq_mask = bfin_generic_error_mask_irq,
355 .irq_unmask = bfin_generic_error_unmask_irq,
358 static void bfin_demux_error_irq(unsigned int int_err_irq,
359 struct irq_desc *inta_desc)
363 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
364 if (bfin_read_EMAC_SYSTAT() & EMAC_ERR_MASK)
368 if (bfin_read_SPORT0_STAT() & SPORT_ERR_MASK)
369 irq = IRQ_SPORT0_ERROR;
370 else if (bfin_read_SPORT1_STAT() & SPORT_ERR_MASK)
371 irq = IRQ_SPORT1_ERROR;
372 else if (bfin_read_PPI_STATUS() & PPI_ERR_MASK)
374 else if (bfin_read_CAN_GIF() & CAN_ERR_MASK)
376 else if (bfin_read_SPI_STAT() & SPI_ERR_MASK)
378 else if ((bfin_read_UART0_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
379 irq = IRQ_UART0_ERROR;
380 else if ((bfin_read_UART1_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
381 irq = IRQ_UART1_ERROR;
384 if (error_int_mask & (1L << (irq - IRQ_PPI_ERROR)))
385 bfin_handle_irq(irq);
390 bfin_write_PPI_STATUS(PPI_ERR_MASK);
392 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
394 bfin_write_EMAC_SYSTAT(EMAC_ERR_MASK);
397 case IRQ_SPORT0_ERROR:
398 bfin_write_SPORT0_STAT(SPORT_ERR_MASK);
401 case IRQ_SPORT1_ERROR:
402 bfin_write_SPORT1_STAT(SPORT_ERR_MASK);
406 bfin_write_CAN_GIS(CAN_ERR_MASK);
410 bfin_write_SPI_STAT(SPI_ERR_MASK);
418 " MASKED PERIPHERAL ERROR INTERRUPT ASSERTED\n",
423 "%s : %s : LINE %d :\nIRQ ?: PERIPHERAL ERROR"
424 " INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
425 __func__, __FILE__, __LINE__);
428 #endif /* BF537_GENERIC_ERROR_INT_DEMUX */
430 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
431 static int mac_stat_int_mask;
433 static void bfin_mac_status_ack_irq(unsigned int irq)
437 bfin_write_EMAC_MMC_TIRQS(
438 bfin_read_EMAC_MMC_TIRQE() &
439 bfin_read_EMAC_MMC_TIRQS());
440 bfin_write_EMAC_MMC_RIRQS(
441 bfin_read_EMAC_MMC_RIRQE() &
442 bfin_read_EMAC_MMC_RIRQS());
444 case IRQ_MAC_RXFSINT:
445 bfin_write_EMAC_RX_STKY(
446 bfin_read_EMAC_RX_IRQE() &
447 bfin_read_EMAC_RX_STKY());
449 case IRQ_MAC_TXFSINT:
450 bfin_write_EMAC_TX_STKY(
451 bfin_read_EMAC_TX_IRQE() &
452 bfin_read_EMAC_TX_STKY());
454 case IRQ_MAC_WAKEDET:
455 bfin_write_EMAC_WKUP_CTL(
456 bfin_read_EMAC_WKUP_CTL() | MPKS | RWKS);
459 /* These bits are W1C */
460 bfin_write_EMAC_SYSTAT(1L << (irq - IRQ_MAC_PHYINT));
465 static void bfin_mac_status_mask_irq(struct irq_data *d)
467 unsigned int irq = d->irq;
469 mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT));
470 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
473 bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() & ~PHYIE);
479 if (!mac_stat_int_mask)
480 bfin_internal_mask_irq(IRQ_MAC_ERROR);
482 bfin_mac_status_ack_irq(irq);
485 static void bfin_mac_status_unmask_irq(struct irq_data *d)
487 unsigned int irq = d->irq;
489 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
492 bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() | PHYIE);
498 if (!mac_stat_int_mask)
499 bfin_internal_unmask_irq(IRQ_MAC_ERROR);
501 mac_stat_int_mask |= 1L << (irq - IRQ_MAC_PHYINT);
505 int bfin_mac_status_set_wake(struct irq_data *d, unsigned int state)
507 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
508 return bfin_internal_set_wake(IRQ_GENERIC_ERROR, state);
510 return bfin_internal_set_wake(IRQ_MAC_ERROR, state);
515 static struct irq_chip bfin_mac_status_irqchip = {
517 .irq_ack = bfin_ack_noop,
518 .irq_mask_ack = bfin_mac_status_mask_irq,
519 .irq_mask = bfin_mac_status_mask_irq,
520 .irq_unmask = bfin_mac_status_unmask_irq,
522 .irq_set_wake = bfin_mac_status_set_wake,
526 static void bfin_demux_mac_status_irq(unsigned int int_err_irq,
527 struct irq_desc *inta_desc)
530 u32 status = bfin_read_EMAC_SYSTAT();
532 for (i = 0; i <= (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++)
533 if (status & (1L << i)) {
534 irq = IRQ_MAC_PHYINT + i;
539 if (mac_stat_int_mask & (1L << (irq - IRQ_MAC_PHYINT))) {
540 bfin_handle_irq(irq);
542 bfin_mac_status_ack_irq(irq);
544 " MASKED MAC ERROR INTERRUPT ASSERTED\n",
549 "%s : %s : LINE %d :\nIRQ ?: MAC ERROR"
550 " INTERRUPT ASSERTED BUT NO SOURCE FOUND"
551 "(EMAC_SYSTAT=0x%X)\n",
552 __func__, __FILE__, __LINE__, status);
556 static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle)
559 _set_irq_handler(irq, handle_level_irq);
561 __set_irq_handler_unlocked(irq, handle);
565 static DECLARE_BITMAP(gpio_enabled, MAX_BLACKFIN_GPIOS);
566 extern void bfin_gpio_irq_prepare(unsigned gpio);
568 #if !defined(CONFIG_BF54x)
570 static void bfin_gpio_ack_irq(struct irq_data *d)
572 /* AFAIK ack_irq in case mask_ack is provided
573 * get's only called for edge sense irqs
575 set_gpio_data(irq_to_gpio(d->irq), 0);
578 static void bfin_gpio_mask_ack_irq(struct irq_data *d)
580 unsigned int irq = d->irq;
581 struct irq_desc *desc = irq_to_desc(irq);
582 u32 gpionr = irq_to_gpio(irq);
584 if (desc->handle_irq == handle_edge_irq)
585 set_gpio_data(gpionr, 0);
587 set_gpio_maska(gpionr, 0);
590 static void bfin_gpio_mask_irq(struct irq_data *d)
592 set_gpio_maska(irq_to_gpio(d->irq), 0);
595 static void bfin_gpio_unmask_irq(struct irq_data *d)
597 set_gpio_maska(irq_to_gpio(d->irq), 1);
600 static unsigned int bfin_gpio_irq_startup(struct irq_data *d)
602 u32 gpionr = irq_to_gpio(d->irq);
604 if (__test_and_set_bit(gpionr, gpio_enabled))
605 bfin_gpio_irq_prepare(gpionr);
607 bfin_gpio_unmask_irq(d);
612 static void bfin_gpio_irq_shutdown(struct irq_data *d)
614 u32 gpionr = irq_to_gpio(d->irq);
616 bfin_gpio_mask_irq(d);
617 __clear_bit(gpionr, gpio_enabled);
618 bfin_gpio_irq_free(gpionr);
621 static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type)
623 unsigned int irq = d->irq;
626 u32 gpionr = irq_to_gpio(irq);
628 if (type == IRQ_TYPE_PROBE) {
629 /* only probe unenabled GPIO interrupt lines */
630 if (test_bit(gpionr, gpio_enabled))
632 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
635 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
636 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
638 snprintf(buf, 16, "gpio-irq%d", irq);
639 ret = bfin_gpio_irq_request(gpionr, buf);
643 if (__test_and_set_bit(gpionr, gpio_enabled))
644 bfin_gpio_irq_prepare(gpionr);
647 __clear_bit(gpionr, gpio_enabled);
651 set_gpio_inen(gpionr, 0);
652 set_gpio_dir(gpionr, 0);
654 if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
655 == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
656 set_gpio_both(gpionr, 1);
658 set_gpio_both(gpionr, 0);
660 if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
661 set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */
663 set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */
665 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
666 set_gpio_edge(gpionr, 1);
667 set_gpio_inen(gpionr, 1);
668 set_gpio_data(gpionr, 0);
671 set_gpio_edge(gpionr, 0);
672 set_gpio_inen(gpionr, 1);
675 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
676 bfin_set_irq_handler(irq, handle_edge_irq);
678 bfin_set_irq_handler(irq, handle_level_irq);
684 int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
686 return gpio_pm_wakeup_ctrl(irq_to_gpio(d->irq), state);
690 static void bfin_demux_gpio_irq(unsigned int inta_irq,
691 struct irq_desc *desc)
693 unsigned int i, gpio, mask, irq, search = 0;
696 #if defined(CONFIG_BF53x)
701 # if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
706 #elif defined(CONFIG_BF538) || defined(CONFIG_BF539)
710 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
720 #elif defined(CONFIG_BF561)
737 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
740 mask = get_gpiop_data(i) & get_gpiop_maska(i);
744 bfin_handle_irq(irq);
750 gpio = irq_to_gpio(irq);
751 mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio);
755 bfin_handle_irq(irq);
763 #else /* CONFIG_BF54x */
765 #define NR_PINT_SYS_IRQS 4
766 #define NR_PINT_BITS 32
768 #define IRQ_NOT_AVAIL 0xFF
770 #define PINT_2_BANK(x) ((x) >> 5)
771 #define PINT_2_BIT(x) ((x) & 0x1F)
772 #define PINT_BIT(x) (1 << (PINT_2_BIT(x)))
774 static unsigned char irq2pint_lut[NR_PINTS];
775 static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS];
778 unsigned int mask_set;
779 unsigned int mask_clear;
780 unsigned int request;
782 unsigned int edge_set;
783 unsigned int edge_clear;
784 unsigned int invert_set;
785 unsigned int invert_clear;
786 unsigned int pinstate;
790 static struct pin_int_t *pint[NR_PINT_SYS_IRQS] = {
791 (struct pin_int_t *)PINT0_MASK_SET,
792 (struct pin_int_t *)PINT1_MASK_SET,
793 (struct pin_int_t *)PINT2_MASK_SET,
794 (struct pin_int_t *)PINT3_MASK_SET,
797 inline unsigned int get_irq_base(u32 bank, u8 bmap)
799 unsigned int irq_base;
801 if (bank < 2) { /*PA-PB */
802 irq_base = IRQ_PA0 + bmap * 16;
804 irq_base = IRQ_PC0 + bmap * 16;
810 /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
811 void init_pint_lut(void)
813 u16 bank, bit, irq_base, bit_pos;
817 memset(irq2pint_lut, IRQ_NOT_AVAIL, sizeof(irq2pint_lut));
819 for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) {
821 pint_assign = pint[bank]->assign;
823 for (bit = 0; bit < NR_PINT_BITS; bit++) {
825 bmap = (pint_assign >> ((bit / 8) * 8)) & 0xFF;
827 irq_base = get_irq_base(bank, bmap);
829 irq_base += (bit % 8) + ((bit / 8) & 1 ? 8 : 0);
830 bit_pos = bit + bank * NR_PINT_BITS;
832 pint2irq_lut[bit_pos] = irq_base - SYS_IRQS;
833 irq2pint_lut[irq_base - SYS_IRQS] = bit_pos;
838 static void bfin_gpio_ack_irq(struct irq_data *d)
840 struct irq_desc *desc = irq_to_desc(d->irq);
841 u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS];
842 u32 pintbit = PINT_BIT(pint_val);
843 u32 bank = PINT_2_BANK(pint_val);
845 if ((desc->status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
846 if (pint[bank]->invert_set & pintbit)
847 pint[bank]->invert_clear = pintbit;
849 pint[bank]->invert_set = pintbit;
851 pint[bank]->request = pintbit;
855 static void bfin_gpio_mask_ack_irq(struct irq_data *d)
857 struct irq_desc *desc = irq_to_desc(d->irq);
858 u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS];
859 u32 pintbit = PINT_BIT(pint_val);
860 u32 bank = PINT_2_BANK(pint_val);
862 if ((desc->status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
863 if (pint[bank]->invert_set & pintbit)
864 pint[bank]->invert_clear = pintbit;
866 pint[bank]->invert_set = pintbit;
869 pint[bank]->request = pintbit;
870 pint[bank]->mask_clear = pintbit;
873 static void bfin_gpio_mask_irq(struct irq_data *d)
875 u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS];
877 pint[PINT_2_BANK(pint_val)]->mask_clear = PINT_BIT(pint_val);
880 static void bfin_gpio_unmask_irq(struct irq_data *d)
882 u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS];
883 u32 pintbit = PINT_BIT(pint_val);
884 u32 bank = PINT_2_BANK(pint_val);
886 pint[bank]->mask_set = pintbit;
889 static unsigned int bfin_gpio_irq_startup(struct irq_data *d)
891 unsigned int irq = d->irq;
892 u32 gpionr = irq_to_gpio(irq);
893 u32 pint_val = irq2pint_lut[irq - SYS_IRQS];
895 if (pint_val == IRQ_NOT_AVAIL) {
897 "GPIO IRQ %d :Not in PINT Assign table "
898 "Reconfigure Interrupt to Port Assignemt\n", irq);
902 if (__test_and_set_bit(gpionr, gpio_enabled))
903 bfin_gpio_irq_prepare(gpionr);
905 bfin_gpio_unmask_irq(d);
910 static void bfin_gpio_irq_shutdown(struct irq_data *d)
912 u32 gpionr = irq_to_gpio(d->irq);
914 bfin_gpio_mask_irq(d);
915 __clear_bit(gpionr, gpio_enabled);
916 bfin_gpio_irq_free(gpionr);
919 static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type)
921 unsigned int irq = d->irq;
924 u32 gpionr = irq_to_gpio(irq);
925 u32 pint_val = irq2pint_lut[irq - SYS_IRQS];
926 u32 pintbit = PINT_BIT(pint_val);
927 u32 bank = PINT_2_BANK(pint_val);
929 if (pint_val == IRQ_NOT_AVAIL)
932 if (type == IRQ_TYPE_PROBE) {
933 /* only probe unenabled GPIO interrupt lines */
934 if (test_bit(gpionr, gpio_enabled))
936 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
939 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
940 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
942 snprintf(buf, 16, "gpio-irq%d", irq);
943 ret = bfin_gpio_irq_request(gpionr, buf);
947 if (__test_and_set_bit(gpionr, gpio_enabled))
948 bfin_gpio_irq_prepare(gpionr);
951 __clear_bit(gpionr, gpio_enabled);
955 if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
956 pint[bank]->invert_set = pintbit; /* low or falling edge denoted by one */
958 pint[bank]->invert_clear = pintbit; /* high or rising edge denoted by zero */
960 if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
961 == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
962 if (gpio_get_value(gpionr))
963 pint[bank]->invert_set = pintbit;
965 pint[bank]->invert_clear = pintbit;
968 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
969 pint[bank]->edge_set = pintbit;
970 bfin_set_irq_handler(irq, handle_edge_irq);
972 pint[bank]->edge_clear = pintbit;
973 bfin_set_irq_handler(irq, handle_level_irq);
980 u32 pint_saved_masks[NR_PINT_SYS_IRQS];
981 u32 pint_wakeup_masks[NR_PINT_SYS_IRQS];
983 int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
986 u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS];
987 u32 bank = PINT_2_BANK(pint_val);
988 u32 pintbit = PINT_BIT(pint_val);
992 pint_irq = IRQ_PINT0;
995 pint_irq = IRQ_PINT2;
998 pint_irq = IRQ_PINT3;
1001 pint_irq = IRQ_PINT1;
1007 bfin_internal_set_wake(pint_irq, state);
1010 pint_wakeup_masks[bank] |= pintbit;
1012 pint_wakeup_masks[bank] &= ~pintbit;
1017 u32 bfin_pm_setup(void)
1021 for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
1022 val = pint[i]->mask_clear;
1023 pint_saved_masks[i] = val;
1024 if (val ^ pint_wakeup_masks[i]) {
1025 pint[i]->mask_clear = val;
1026 pint[i]->mask_set = pint_wakeup_masks[i];
1033 void bfin_pm_restore(void)
1037 for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
1038 val = pint_saved_masks[i];
1039 if (val ^ pint_wakeup_masks[i]) {
1040 pint[i]->mask_clear = pint[i]->mask_clear;
1041 pint[i]->mask_set = val;
1047 static void bfin_demux_gpio_irq(unsigned int inta_irq,
1048 struct irq_desc *desc)
1070 pint_val = bank * NR_PINT_BITS;
1072 request = pint[bank]->request;
1076 irq = pint2irq_lut[pint_val] + SYS_IRQS;
1077 bfin_handle_irq(irq);
1086 static struct irq_chip bfin_gpio_irqchip = {
1088 .irq_ack = bfin_gpio_ack_irq,
1089 .irq_mask = bfin_gpio_mask_irq,
1090 .irq_mask_ack = bfin_gpio_mask_ack_irq,
1091 .irq_unmask = bfin_gpio_unmask_irq,
1092 .irq_disable = bfin_gpio_mask_irq,
1093 .irq_enable = bfin_gpio_unmask_irq,
1094 .irq_set_type = bfin_gpio_irq_type,
1095 .irq_startup = bfin_gpio_irq_startup,
1096 .irq_shutdown = bfin_gpio_irq_shutdown,
1098 .irq_set_wake = bfin_gpio_set_wake,
1102 void __cpuinit init_exception_vectors(void)
1104 /* cannot program in software:
1105 * evt0 - emulation (jtag)
1108 bfin_write_EVT2(evt_nmi);
1109 bfin_write_EVT3(trap);
1110 bfin_write_EVT5(evt_ivhw);
1111 bfin_write_EVT6(evt_timer);
1112 bfin_write_EVT7(evt_evt7);
1113 bfin_write_EVT8(evt_evt8);
1114 bfin_write_EVT9(evt_evt9);
1115 bfin_write_EVT10(evt_evt10);
1116 bfin_write_EVT11(evt_evt11);
1117 bfin_write_EVT12(evt_evt12);
1118 bfin_write_EVT13(evt_evt13);
1119 bfin_write_EVT14(evt_evt14);
1120 bfin_write_EVT15(evt_system_call);
1125 * This function should be called during kernel startup to initialize
1126 * the BFin IRQ handling routines.
1129 int __init init_arch_irq(void)
1132 unsigned long ilat = 0;
1133 /* Disable all the peripheral intrs - page 4-29 HW Ref manual */
1134 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561) \
1135 || defined(BF538_FAMILY) || defined(CONFIG_BF51x)
1136 bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
1137 bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
1138 # ifdef CONFIG_BF54x
1139 bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
1142 bfin_write_SICB_IMASK0(SIC_UNMASK_ALL);
1143 bfin_write_SICB_IMASK1(SIC_UNMASK_ALL);
1146 bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
1149 local_irq_disable();
1151 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
1152 /* Clear EMAC Interrupt Status bits so we can demux it later */
1153 bfin_write_EMAC_SYSTAT(-1);
1157 # ifdef CONFIG_PINTx_REASSIGN
1158 pint[0]->assign = CONFIG_PINT0_ASSIGN;
1159 pint[1]->assign = CONFIG_PINT1_ASSIGN;
1160 pint[2]->assign = CONFIG_PINT2_ASSIGN;
1161 pint[3]->assign = CONFIG_PINT3_ASSIGN;
1163 /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
1167 for (irq = 0; irq <= SYS_IRQS; irq++) {
1168 if (irq <= IRQ_CORETMR)
1169 set_irq_chip(irq, &bfin_core_irqchip);
1171 set_irq_chip(irq, &bfin_internal_irqchip);
1174 #if defined(CONFIG_BF53x)
1176 # if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
1179 #elif defined(CONFIG_BF54x)
1184 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
1185 case IRQ_PORTF_INTA:
1186 case IRQ_PORTG_INTA:
1187 case IRQ_PORTH_INTA:
1188 #elif defined(CONFIG_BF561)
1189 case IRQ_PROG0_INTA:
1190 case IRQ_PROG1_INTA:
1191 case IRQ_PROG2_INTA:
1192 #elif defined(CONFIG_BF538) || defined(CONFIG_BF539)
1193 case IRQ_PORTF_INTA:
1195 set_irq_chained_handler(irq,
1196 bfin_demux_gpio_irq);
1198 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
1199 case IRQ_GENERIC_ERROR:
1200 set_irq_chained_handler(irq, bfin_demux_error_irq);
1203 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
1205 set_irq_chained_handler(irq, bfin_demux_mac_status_irq);
1211 set_irq_handler(irq, handle_percpu_irq);
1215 #ifdef CONFIG_TICKSOURCE_CORETMR
1218 set_irq_handler(irq, handle_percpu_irq);
1221 set_irq_handler(irq, handle_simple_irq);
1226 #ifdef CONFIG_TICKSOURCE_GPTMR0
1228 set_irq_handler(irq, handle_simple_irq);
1234 set_irq_handler(irq, handle_level_irq);
1236 #else /* !CONFIG_IPIPE */
1238 set_irq_handler(irq, handle_simple_irq);
1240 #endif /* !CONFIG_IPIPE */
1244 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
1245 for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
1246 set_irq_chip_and_handler(irq, &bfin_generic_error_irqchip,
1248 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
1249 set_irq_chained_handler(IRQ_MAC_ERROR, bfin_demux_mac_status_irq);
1253 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
1254 for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++)
1255 set_irq_chip_and_handler(irq, &bfin_mac_status_irqchip,
1258 /* if configured as edge, then will be changed to do_edge_IRQ */
1259 for (irq = GPIO_IRQ_BASE;
1260 irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++)
1261 set_irq_chip_and_handler(irq, &bfin_gpio_irqchip,
1264 bfin_write_IMASK(0);
1266 ilat = bfin_read_ILAT();
1268 bfin_write_ILAT(ilat);
1271 printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
1272 /* IMASK=xxx is equivalent to STI xx or bfin_irq_flags=xx,
1273 * local_irq_enable()
1276 /* Therefore it's better to setup IARs before interrupts enabled */
1279 /* Enable interrupts IVG7-15 */
1280 bfin_irq_flags |= IMASK_IVG15 |
1281 IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
1282 IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
1284 /* This implicitly covers ANOMALY_05000171
1285 * Boot-ROM code modifies SICA_IWRx wakeup registers
1288 bfin_write_SIC_IWR0(IWR_DISABLE_ALL);
1290 /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which
1291 * will screw up the bootrom as it relies on MDMA0/1 waking it
1292 * up from IDLE instructions. See this report for more info:
1293 * http://blackfin.uclinux.org/gf/tracker/4323
1295 if (ANOMALY_05000435)
1296 bfin_write_SIC_IWR1(IWR_ENABLE(10) | IWR_ENABLE(11));
1298 bfin_write_SIC_IWR1(IWR_DISABLE_ALL);
1301 bfin_write_SIC_IWR2(IWR_DISABLE_ALL);
1304 bfin_write_SIC_IWR(IWR_DISABLE_ALL);
1310 #ifdef CONFIG_DO_IRQ_L1
1311 __attribute__((l1_text))
1313 void do_irq(int vec, struct pt_regs *fp)
1315 if (vec == EVT_IVTMR_P) {
1318 struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
1319 struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
1320 #if defined(SIC_ISR0)
1321 unsigned long sic_status[3];
1323 if (smp_processor_id()) {
1325 /* This will be optimized out in UP mode. */
1326 sic_status[0] = bfin_read_SICB_ISR0() & bfin_read_SICB_IMASK0();
1327 sic_status[1] = bfin_read_SICB_ISR1() & bfin_read_SICB_IMASK1();
1330 sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
1331 sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
1334 sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
1337 if (ivg >= ivg_stop) {
1338 atomic_inc(&num_spurious);
1341 if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
1345 unsigned long sic_status;
1347 sic_status = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
1350 if (ivg >= ivg_stop) {
1351 atomic_inc(&num_spurious);
1353 } else if (sic_status & ivg->isrflag)
1359 asm_do_IRQ(vec, fp);
1364 int __ipipe_get_irq_priority(unsigned irq)
1368 if (irq <= IRQ_CORETMR)
1371 for (ient = 0; ient < NR_PERI_INTS; ient++) {
1372 struct ivgx *ivg = ivg_table + ient;
1373 if (ivg->irqno == irq) {
1374 for (prio = 0; prio <= IVG13-IVG7; prio++) {
1375 if (ivg7_13[prio].ifirst <= ivg &&
1376 ivg7_13[prio].istop > ivg)
1385 /* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */
1386 #ifdef CONFIG_DO_IRQ_L1
1387 __attribute__((l1_text))
1389 asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
1391 struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr();
1392 struct ipipe_domain *this_domain = __ipipe_current_domain;
1393 struct ivgx *ivg_stop = ivg7_13[vec-IVG7].istop;
1394 struct ivgx *ivg = ivg7_13[vec-IVG7].ifirst;
1397 if (likely(vec == EVT_IVTMR_P))
1400 #if defined(SIC_ISR0)
1401 unsigned long sic_status[3];
1403 sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
1404 sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
1406 sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
1409 if (ivg >= ivg_stop) {
1410 atomic_inc(&num_spurious);
1413 if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
1417 unsigned long sic_status;
1419 sic_status = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
1422 if (ivg >= ivg_stop) {
1423 atomic_inc(&num_spurious);
1425 } else if (sic_status & ivg->isrflag)
1432 if (irq == IRQ_SYSTMR) {
1433 #if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_TICKSOURCE_GPTMR0)
1434 bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */
1436 /* This is basically what we need from the register frame. */
1437 __raw_get_cpu_var(__ipipe_tick_regs).ipend = regs->ipend;
1438 __raw_get_cpu_var(__ipipe_tick_regs).pc = regs->pc;
1439 if (this_domain != ipipe_root_domain)
1440 __raw_get_cpu_var(__ipipe_tick_regs).ipend &= ~0x10;
1442 __raw_get_cpu_var(__ipipe_tick_regs).ipend |= 0x10;
1445 if (this_domain == ipipe_root_domain) {
1446 s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
1450 ipipe_trace_irq_entry(irq);
1451 __ipipe_handle_irq(irq, regs);
1452 ipipe_trace_irq_exit(irq);
1454 if (this_domain == ipipe_root_domain) {
1455 set_thread_flag(TIF_IRQ_SYNC);
1457 __clear_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
1458 return !test_bit(IPIPE_STALL_FLAG, &p->status);
1465 #endif /* CONFIG_IPIPE */