2 * Code to handle IP32 IRQs
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2000 Harald Koerfgen
9 * Copyright (C) 2001 Keith M Wesolowski
11 #include <linux/init.h>
12 #include <linux/kernel_stat.h>
13 #include <linux/types.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
16 #include <linux/bitops.h>
17 #include <linux/kernel.h>
19 #include <linux/random.h>
20 #include <linux/sched.h>
22 #include <asm/irq_cpu.h>
23 #include <asm/mipsregs.h>
24 #include <asm/signal.h>
26 #include <asm/ip32/crime.h>
27 #include <asm/ip32/mace.h>
28 #include <asm/ip32/ip32_ints.h>
30 /* issue a PIO read to make sure no PIO writes are pending */
31 static void inline flush_crime_bus(void)
36 static void inline flush_mace_bus(void)
38 mace->perif.ctrl.misc;
44 * IP0 -> software (ignored)
45 * IP1 -> software (ignored)
46 * IP2 -> (irq0) C crime 1.1 all interrupts; crime 1.5 ???
47 * IP3 -> (irq1) X unknown
48 * IP4 -> (irq2) X unknown
49 * IP5 -> (irq3) X unknown
50 * IP6 -> (irq4) X unknown
51 * IP7 -> (irq5) 7 CPU count/compare timer (system timer)
55 * CRIME_INT_STAT 31:0:
60 * 3 -> 11 Mace ethernet
61 * 4 -> S SuperIO sub-interrupt
62 * 5 -> M Miscellaneous sub-interrupt
63 * 6 -> A Audio sub-interrupt
64 * 7 -> 15 PCI bridge errors
65 * 8 -> 16 PCI SCSI aic7xxx 0
66 * 9 -> 17 PCI SCSI aic7xxx 1
68 * 11 -> 19 unused (PCI slot 1)
69 * 12 -> 20 unused (PCI slot 2)
70 * 13 -> 21 unused (PCI shared 0)
71 * 14 -> 22 unused (PCI shared 1)
72 * 15 -> 23 unused (PCI shared 2)
78 * 21 -> 29 Memory errors
79 * 22 -> 30 RE empty edge (E)
80 * 23 -> 31 RE full edge (E)
81 * 24 -> 32 RE idle edge (E)
82 * 25 -> 33 RE empty level
83 * 26 -> 34 RE full level
84 * 27 -> 35 RE idle level
85 * 28 -> 36 unused (software 0) (E)
86 * 29 -> 37 unused (software 1) (E)
87 * 30 -> 38 unused (software 2) - crime 1.5 CPU SysCorError (E)
90 * S, M, A: Use the MACE ISA interrupt register
91 * MACE_ISA_INT_STAT 31:0
96 * 10 -> X Keyboard polled
98 * 12 -> X Mouse polled
99 * 13-15 -> 53-55 Count/compare timers
100 * 16-19 -> 56-59 Parallel (16 E)
101 * 20-25 -> 60-62 Serial 1 (22 E)
102 * 26-31 -> 66-71 Serial 2 (28 E)
104 * Note that this means IRQs 12-14, 50, and 52 do not exist. This is a
105 * different IRQ map than IRIX uses, but that's OK as Linux irq handling
106 * is quite different anyway.
109 /* Some initial interrupts to set up */
110 extern irqreturn_t crime_memerr_intr(int irq, void *dev_id);
111 extern irqreturn_t crime_cpuerr_intr(int irq, void *dev_id);
113 static struct irqaction memerr_irq = {
114 .handler = crime_memerr_intr,
115 .name = "CRIME memory error",
118 static struct irqaction cpuerr_irq = {
119 .handler = crime_cpuerr_intr,
120 .name = "CRIME CPU error",
124 * This is for pure CRIME interrupts - ie not MACE. The advantage?
125 * We get to split the register in half and do faster lookups.
128 static uint64_t crime_mask;
130 static inline void crime_enable_irq(struct irq_data *d)
132 unsigned int bit = d->irq - CRIME_IRQ_BASE;
134 crime_mask |= 1 << bit;
135 crime->imask = crime_mask;
138 static inline void crime_disable_irq(struct irq_data *d)
140 unsigned int bit = d->irq - CRIME_IRQ_BASE;
142 crime_mask &= ~(1 << bit);
143 crime->imask = crime_mask;
147 static struct irq_chip crime_level_interrupt = {
148 .name = "IP32 CRIME",
149 .irq_mask = crime_disable_irq,
150 .irq_unmask = crime_enable_irq,
153 static void crime_edge_mask_and_ack_irq(struct irq_data *d)
155 unsigned int bit = d->irq - CRIME_IRQ_BASE;
158 /* Edge triggered interrupts must be cleared. */
159 crime_int = crime->hard_int;
160 crime_int &= ~(1 << bit);
161 crime->hard_int = crime_int;
163 crime_disable_irq(d);
166 static struct irq_chip crime_edge_interrupt = {
167 .name = "IP32 CRIME",
168 .irq_ack = crime_edge_mask_and_ack_irq,
169 .irq_mask = crime_disable_irq,
170 .irq_mask_ack = crime_edge_mask_and_ack_irq,
171 .irq_unmask = crime_enable_irq,
175 * This is for MACE PCI interrupts. We can decrease bus traffic by masking
176 * as close to the source as possible. This also means we can take the
177 * next chunk of the CRIME register in one piece.
180 static unsigned long macepci_mask;
182 static void enable_macepci_irq(struct irq_data *d)
184 macepci_mask |= MACEPCI_CONTROL_INT(d->irq - MACEPCI_SCSI0_IRQ);
185 mace->pci.control = macepci_mask;
186 crime_mask |= 1 << (d->irq - CRIME_IRQ_BASE);
187 crime->imask = crime_mask;
190 static void disable_macepci_irq(struct irq_data *d)
192 crime_mask &= ~(1 << (d->irq - CRIME_IRQ_BASE));
193 crime->imask = crime_mask;
195 macepci_mask &= ~MACEPCI_CONTROL_INT(d->irq - MACEPCI_SCSI0_IRQ);
196 mace->pci.control = macepci_mask;
200 static struct irq_chip ip32_macepci_interrupt = {
201 .name = "IP32 MACE PCI",
202 .irq_mask = disable_macepci_irq,
203 .irq_unmask = enable_macepci_irq,
206 /* This is used for MACE ISA interrupts. That means bits 4-6 in the
210 #define MACEISA_AUDIO_INT (MACEISA_AUDIO_SW_INT | \
211 MACEISA_AUDIO_SC_INT | \
212 MACEISA_AUDIO1_DMAT_INT | \
213 MACEISA_AUDIO1_OF_INT | \
214 MACEISA_AUDIO2_DMAT_INT | \
215 MACEISA_AUDIO2_MERR_INT | \
216 MACEISA_AUDIO3_DMAT_INT | \
217 MACEISA_AUDIO3_MERR_INT)
218 #define MACEISA_MISC_INT (MACEISA_RTC_INT | \
220 MACEISA_KEYB_POLL_INT | \
221 MACEISA_MOUSE_INT | \
222 MACEISA_MOUSE_POLL_INT | \
223 MACEISA_TIMER0_INT | \
224 MACEISA_TIMER1_INT | \
226 #define MACEISA_SUPERIO_INT (MACEISA_PARALLEL_INT | \
227 MACEISA_PAR_CTXA_INT | \
228 MACEISA_PAR_CTXB_INT | \
229 MACEISA_PAR_MERR_INT | \
230 MACEISA_SERIAL1_INT | \
231 MACEISA_SERIAL1_TDMAT_INT | \
232 MACEISA_SERIAL1_TDMAPR_INT | \
233 MACEISA_SERIAL1_TDMAME_INT | \
234 MACEISA_SERIAL1_RDMAT_INT | \
235 MACEISA_SERIAL1_RDMAOR_INT | \
236 MACEISA_SERIAL2_INT | \
237 MACEISA_SERIAL2_TDMAT_INT | \
238 MACEISA_SERIAL2_TDMAPR_INT | \
239 MACEISA_SERIAL2_TDMAME_INT | \
240 MACEISA_SERIAL2_RDMAT_INT | \
241 MACEISA_SERIAL2_RDMAOR_INT)
243 static unsigned long maceisa_mask;
245 static void enable_maceisa_irq(struct irq_data *d)
247 unsigned int crime_int = 0;
249 pr_debug("maceisa enable: %u\n", d->irq);
252 case MACEISA_AUDIO_SW_IRQ ... MACEISA_AUDIO3_MERR_IRQ:
253 crime_int = MACE_AUDIO_INT;
255 case MACEISA_RTC_IRQ ... MACEISA_TIMER2_IRQ:
256 crime_int = MACE_MISC_INT;
258 case MACEISA_PARALLEL_IRQ ... MACEISA_SERIAL2_RDMAOR_IRQ:
259 crime_int = MACE_SUPERIO_INT;
262 pr_debug("crime_int %08x enabled\n", crime_int);
263 crime_mask |= crime_int;
264 crime->imask = crime_mask;
265 maceisa_mask |= 1 << (d->irq - MACEISA_AUDIO_SW_IRQ);
266 mace->perif.ctrl.imask = maceisa_mask;
269 static void disable_maceisa_irq(struct irq_data *d)
271 unsigned int crime_int = 0;
273 maceisa_mask &= ~(1 << (d->irq - MACEISA_AUDIO_SW_IRQ));
274 if (!(maceisa_mask & MACEISA_AUDIO_INT))
275 crime_int |= MACE_AUDIO_INT;
276 if (!(maceisa_mask & MACEISA_MISC_INT))
277 crime_int |= MACE_MISC_INT;
278 if (!(maceisa_mask & MACEISA_SUPERIO_INT))
279 crime_int |= MACE_SUPERIO_INT;
280 crime_mask &= ~crime_int;
281 crime->imask = crime_mask;
283 mace->perif.ctrl.imask = maceisa_mask;
287 static void mask_and_ack_maceisa_irq(struct irq_data *d)
289 unsigned long mace_int;
292 mace_int = mace->perif.ctrl.istat;
293 mace_int &= ~(1 << (d->irq - MACEISA_AUDIO_SW_IRQ));
294 mace->perif.ctrl.istat = mace_int;
296 disable_maceisa_irq(d);
299 static struct irq_chip ip32_maceisa_level_interrupt = {
300 .name = "IP32 MACE ISA",
301 .irq_mask = disable_maceisa_irq,
302 .irq_unmask = enable_maceisa_irq,
305 static struct irq_chip ip32_maceisa_edge_interrupt = {
306 .name = "IP32 MACE ISA",
307 .irq_ack = mask_and_ack_maceisa_irq,
308 .irq_mask = disable_maceisa_irq,
309 .irq_mask_ack = mask_and_ack_maceisa_irq,
310 .irq_unmask = enable_maceisa_irq,
313 /* This is used for regular non-ISA, non-PCI MACE interrupts. That means
314 * bits 0-3 and 7 in the CRIME register.
317 static void enable_mace_irq(struct irq_data *d)
319 unsigned int bit = d->irq - CRIME_IRQ_BASE;
321 crime_mask |= (1 << bit);
322 crime->imask = crime_mask;
325 static void disable_mace_irq(struct irq_data *d)
327 unsigned int bit = d->irq - CRIME_IRQ_BASE;
329 crime_mask &= ~(1 << bit);
330 crime->imask = crime_mask;
334 static struct irq_chip ip32_mace_interrupt = {
336 .irq_mask = disable_mace_irq,
337 .irq_unmask = enable_mace_irq,
340 static void ip32_unknown_interrupt(void)
342 printk("Unknown interrupt occurred!\n");
343 printk("cp0_status: %08x\n", read_c0_status());
344 printk("cp0_cause: %08x\n", read_c0_cause());
345 printk("CRIME intr mask: %016lx\n", crime->imask);
346 printk("CRIME intr status: %016lx\n", crime->istat);
347 printk("CRIME hardware intr register: %016lx\n", crime->hard_int);
348 printk("MACE ISA intr mask: %08lx\n", mace->perif.ctrl.imask);
349 printk("MACE ISA intr status: %08lx\n", mace->perif.ctrl.istat);
350 printk("MACE PCI control register: %08x\n", mace->pci.control);
352 printk("Register dump:\n");
353 show_regs(get_irq_regs());
355 printk("Please mail this report to linux-mips@linux-mips.org\n");
356 printk("Spinning...");
360 /* CRIME 1.1 appears to deliver all interrupts to this one pin. */
361 /* change this to loop over all edge-triggered irqs, exception masked out ones */
362 static void ip32_irq0(void)
368 * Sanity check interrupt numbering enum.
369 * MACE got 32 interrupts and there are 32 MACE ISA interrupts daisy
372 BUILD_BUG_ON(CRIME_VICE_IRQ - MACE_VID_IN1_IRQ != 31);
373 BUILD_BUG_ON(MACEISA_SERIAL2_RDMAOR_IRQ - MACEISA_AUDIO_SW_IRQ != 31);
375 crime_int = crime->istat & crime_mask;
377 /* crime sometime delivers spurious interrupts, ignore them */
378 if (unlikely(crime_int == 0))
381 irq = MACE_VID_IN1_IRQ + __ffs(crime_int);
383 if (crime_int & CRIME_MACEISA_INT_MASK) {
384 unsigned long mace_int = mace->perif.ctrl.istat;
385 irq = __ffs(mace_int & maceisa_mask) + MACEISA_AUDIO_SW_IRQ;
388 pr_debug("*irq %u*\n", irq);
392 static void ip32_irq1(void)
394 ip32_unknown_interrupt();
397 static void ip32_irq2(void)
399 ip32_unknown_interrupt();
402 static void ip32_irq3(void)
404 ip32_unknown_interrupt();
407 static void ip32_irq4(void)
409 ip32_unknown_interrupt();
412 static void ip32_irq5(void)
414 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
417 asmlinkage void plat_irq_dispatch(void)
419 unsigned int pending = read_c0_status() & read_c0_cause();
421 if (likely(pending & IE_IRQ0))
423 else if (unlikely(pending & IE_IRQ1))
425 else if (unlikely(pending & IE_IRQ2))
427 else if (unlikely(pending & IE_IRQ3))
429 else if (unlikely(pending & IE_IRQ4))
431 else if (likely(pending & IE_IRQ5))
435 void __init arch_init_irq(void)
439 /* Install our interrupt handler, then clear and disable all
440 * CRIME and MACE interrupts. */
444 mace->perif.ctrl.istat = 0;
445 mace->perif.ctrl.imask = 0;
448 for (irq = CRIME_IRQ_BASE; irq <= IP32_IRQ_MAX; irq++) {
450 case MACE_VID_IN1_IRQ ... MACE_PCI_BRIDGE_IRQ:
451 irq_set_chip_and_handler_name(irq,
452 &ip32_mace_interrupt,
457 case MACEPCI_SCSI0_IRQ ... MACEPCI_SHARED2_IRQ:
458 irq_set_chip_and_handler_name(irq,
459 &ip32_macepci_interrupt,
464 case CRIME_CPUERR_IRQ:
465 case CRIME_MEMERR_IRQ:
466 irq_set_chip_and_handler_name(irq,
467 &crime_level_interrupt,
472 case CRIME_GBE0_IRQ ... CRIME_GBE3_IRQ:
473 case CRIME_RE_EMPTY_E_IRQ ... CRIME_RE_IDLE_E_IRQ:
474 case CRIME_SOFT0_IRQ ... CRIME_SOFT2_IRQ:
476 irq_set_chip_and_handler_name(irq,
477 &crime_edge_interrupt,
482 case MACEISA_PARALLEL_IRQ:
483 case MACEISA_SERIAL1_TDMAPR_IRQ:
484 case MACEISA_SERIAL2_TDMAPR_IRQ:
485 irq_set_chip_and_handler_name(irq,
486 &ip32_maceisa_edge_interrupt,
492 irq_set_chip_and_handler_name(irq,
493 &ip32_maceisa_level_interrupt,
499 setup_irq(CRIME_MEMERR_IRQ, &memerr_irq);
500 setup_irq(CRIME_CPUERR_IRQ, &cpuerr_irq);
502 #define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
503 change_c0_status(ST0_IM, ALLINTS);