Commit | Line | Data |
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9ae6f740 TP |
1 | /* |
2 | * Marvell Armada 370 and Armada XP SoC IRQ handling | |
3 | * | |
4 | * Copyright (C) 2012 Marvell | |
5 | * | |
6 | * Lior Amsalem <alior@marvell.com> | |
7 | * Gregory CLEMENT <gregory.clement@free-electrons.com> | |
8 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | |
9 | * Ben Dooks <ben.dooks@codethink.co.uk> | |
10 | * | |
11 | * This file is licensed under the terms of the GNU General Public | |
12 | * License version 2. This program is licensed "as is" without any | |
13 | * warranty of any kind, whether express or implied. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/interrupt.h> | |
bc69b8ad | 21 | #include <linux/irqchip/chained_irq.h> |
d7df84b3 | 22 | #include <linux/cpu.h> |
9ae6f740 TP |
23 | #include <linux/io.h> |
24 | #include <linux/of_address.h> | |
25 | #include <linux/of_irq.h> | |
31f614ed | 26 | #include <linux/of_pci.h> |
9ae6f740 | 27 | #include <linux/irqdomain.h> |
31f614ed | 28 | #include <linux/slab.h> |
0f077eb5 | 29 | #include <linux/syscore_ops.h> |
31f614ed | 30 | #include <linux/msi.h> |
9ae6f740 TP |
31 | #include <asm/mach/arch.h> |
32 | #include <asm/exception.h> | |
344e873e | 33 | #include <asm/smp_plat.h> |
9339d432 TP |
34 | #include <asm/mach/irq.h> |
35 | ||
36 | #include "irqchip.h" | |
9ae6f740 TP |
37 | |
38 | /* Interrupt Controller Registers Map */ | |
39 | #define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48) | |
40 | #define ARMADA_370_XP_INT_CLEAR_MASK_OFFS (0x4C) | |
41 | ||
f3e16ccd | 42 | #define ARMADA_370_XP_INT_CONTROL (0x00) |
9ae6f740 TP |
43 | #define ARMADA_370_XP_INT_SET_ENABLE_OFFS (0x30) |
44 | #define ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS (0x34) | |
3202bf01 | 45 | #define ARMADA_370_XP_INT_SOURCE_CTL(irq) (0x100 + irq*4) |
8cc3cfc5 | 46 | #define ARMADA_370_XP_INT_SOURCE_CPU_MASK 0xF |
758e8366 | 47 | #define ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid) ((BIT(0) | BIT(8)) << cpuid) |
9ae6f740 TP |
48 | |
49 | #define ARMADA_370_XP_CPU_INTACK_OFFS (0x44) | |
bc69b8ad | 50 | #define ARMADA_375_PPI_CAUSE (0x10) |
9ae6f740 | 51 | |
344e873e GC |
52 | #define ARMADA_370_XP_SW_TRIG_INT_OFFS (0x4) |
53 | #define ARMADA_370_XP_IN_DRBEL_MSK_OFFS (0xc) | |
54 | #define ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS (0x8) | |
55 | ||
3202bf01 GC |
56 | #define ARMADA_370_XP_MAX_PER_CPU_IRQS (28) |
57 | ||
7f23f62f GC |
58 | #define ARMADA_370_XP_TIMER0_PER_CPU_IRQ (5) |
59 | ||
5ec69017 TP |
60 | #define IPI_DOORBELL_START (0) |
61 | #define IPI_DOORBELL_END (8) | |
62 | #define IPI_DOORBELL_MASK 0xFF | |
31f614ed TP |
63 | #define PCI_MSI_DOORBELL_START (16) |
64 | #define PCI_MSI_DOORBELL_NR (16) | |
65 | #define PCI_MSI_DOORBELL_END (32) | |
66 | #define PCI_MSI_DOORBELL_MASK 0xFFFF0000 | |
344e873e | 67 | |
9ae6f740 TP |
68 | static void __iomem *per_cpu_int_base; |
69 | static void __iomem *main_int_base; | |
70 | static struct irq_domain *armada_370_xp_mpic_domain; | |
0f077eb5 | 71 | static u32 doorbell_mask_reg; |
5724be84 | 72 | static int parent_irq; |
31f614ed TP |
73 | #ifdef CONFIG_PCI_MSI |
74 | static struct irq_domain *armada_370_xp_msi_domain; | |
75 | static DECLARE_BITMAP(msi_used, PCI_MSI_DOORBELL_NR); | |
76 | static DEFINE_MUTEX(msi_used_lock); | |
77 | static phys_addr_t msi_doorbell_addr; | |
78 | #endif | |
9ae6f740 | 79 | |
3202bf01 GC |
80 | /* |
81 | * In SMP mode: | |
82 | * For shared global interrupts, mask/unmask global enable bit | |
097ef18d | 83 | * For CPU interrupts, mask/unmask the calling CPU's bit |
3202bf01 | 84 | */ |
9ae6f740 TP |
85 | static void armada_370_xp_irq_mask(struct irq_data *d) |
86 | { | |
3202bf01 GC |
87 | irq_hw_number_t hwirq = irqd_to_hwirq(d); |
88 | ||
7f23f62f | 89 | if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) |
3202bf01 GC |
90 | writel(hwirq, main_int_base + |
91 | ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS); | |
92 | else | |
93 | writel(hwirq, per_cpu_int_base + | |
94 | ARMADA_370_XP_INT_SET_MASK_OFFS); | |
9ae6f740 TP |
95 | } |
96 | ||
97 | static void armada_370_xp_irq_unmask(struct irq_data *d) | |
98 | { | |
3202bf01 GC |
99 | irq_hw_number_t hwirq = irqd_to_hwirq(d); |
100 | ||
7f23f62f | 101 | if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) |
3202bf01 GC |
102 | writel(hwirq, main_int_base + |
103 | ARMADA_370_XP_INT_SET_ENABLE_OFFS); | |
104 | else | |
105 | writel(hwirq, per_cpu_int_base + | |
106 | ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
9ae6f740 TP |
107 | } |
108 | ||
31f614ed TP |
109 | #ifdef CONFIG_PCI_MSI |
110 | ||
111 | static int armada_370_xp_alloc_msi(void) | |
112 | { | |
113 | int hwirq; | |
114 | ||
115 | mutex_lock(&msi_used_lock); | |
116 | hwirq = find_first_zero_bit(&msi_used, PCI_MSI_DOORBELL_NR); | |
117 | if (hwirq >= PCI_MSI_DOORBELL_NR) | |
118 | hwirq = -ENOSPC; | |
119 | else | |
120 | set_bit(hwirq, msi_used); | |
121 | mutex_unlock(&msi_used_lock); | |
122 | ||
123 | return hwirq; | |
124 | } | |
125 | ||
126 | static void armada_370_xp_free_msi(int hwirq) | |
127 | { | |
128 | mutex_lock(&msi_used_lock); | |
129 | if (!test_bit(hwirq, msi_used)) | |
130 | pr_err("trying to free unused MSI#%d\n", hwirq); | |
131 | else | |
132 | clear_bit(hwirq, msi_used); | |
133 | mutex_unlock(&msi_used_lock); | |
134 | } | |
135 | ||
c2791b80 | 136 | static int armada_370_xp_setup_msi_irq(struct msi_controller *chip, |
31f614ed TP |
137 | struct pci_dev *pdev, |
138 | struct msi_desc *desc) | |
139 | { | |
140 | struct msi_msg msg; | |
da343fc7 | 141 | int virq, hwirq; |
31f614ed | 142 | |
3930115e AG |
143 | /* We support MSI, but not MSI-X */ |
144 | if (desc->msi_attrib.is_msix) | |
145 | return -EINVAL; | |
146 | ||
31f614ed TP |
147 | hwirq = armada_370_xp_alloc_msi(); |
148 | if (hwirq < 0) | |
149 | return hwirq; | |
150 | ||
151 | virq = irq_create_mapping(armada_370_xp_msi_domain, hwirq); | |
152 | if (!virq) { | |
153 | armada_370_xp_free_msi(hwirq); | |
154 | return -EINVAL; | |
155 | } | |
156 | ||
157 | irq_set_msi_desc(virq, desc); | |
158 | ||
159 | msg.address_lo = msi_doorbell_addr; | |
160 | msg.address_hi = 0; | |
161 | msg.data = 0xf00 | (hwirq + 16); | |
162 | ||
83a18912 | 163 | pci_write_msi_msg(virq, &msg); |
31f614ed TP |
164 | return 0; |
165 | } | |
166 | ||
c2791b80 | 167 | static void armada_370_xp_teardown_msi_irq(struct msi_controller *chip, |
31f614ed TP |
168 | unsigned int irq) |
169 | { | |
170 | struct irq_data *d = irq_get_irq_data(irq); | |
ff3c6645 NG |
171 | unsigned long hwirq = d->hwirq; |
172 | ||
31f614ed | 173 | irq_dispose_mapping(irq); |
ff3c6645 | 174 | armada_370_xp_free_msi(hwirq); |
31f614ed TP |
175 | } |
176 | ||
177 | static struct irq_chip armada_370_xp_msi_irq_chip = { | |
178 | .name = "armada_370_xp_msi_irq", | |
280510f1 TG |
179 | .irq_enable = pci_msi_unmask_irq, |
180 | .irq_disable = pci_msi_mask_irq, | |
181 | .irq_mask = pci_msi_mask_irq, | |
182 | .irq_unmask = pci_msi_unmask_irq, | |
31f614ed TP |
183 | }; |
184 | ||
185 | static int armada_370_xp_msi_map(struct irq_domain *domain, unsigned int virq, | |
186 | irq_hw_number_t hw) | |
187 | { | |
188 | irq_set_chip_and_handler(virq, &armada_370_xp_msi_irq_chip, | |
189 | handle_simple_irq); | |
190 | set_irq_flags(virq, IRQF_VALID); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static const struct irq_domain_ops armada_370_xp_msi_irq_ops = { | |
196 | .map = armada_370_xp_msi_map, | |
197 | }; | |
198 | ||
199 | static int armada_370_xp_msi_init(struct device_node *node, | |
200 | phys_addr_t main_int_phys_base) | |
201 | { | |
c2791b80 | 202 | struct msi_controller *msi_chip; |
31f614ed TP |
203 | u32 reg; |
204 | int ret; | |
205 | ||
206 | msi_doorbell_addr = main_int_phys_base + | |
207 | ARMADA_370_XP_SW_TRIG_INT_OFFS; | |
208 | ||
209 | msi_chip = kzalloc(sizeof(*msi_chip), GFP_KERNEL); | |
210 | if (!msi_chip) | |
211 | return -ENOMEM; | |
212 | ||
213 | msi_chip->setup_irq = armada_370_xp_setup_msi_irq; | |
214 | msi_chip->teardown_irq = armada_370_xp_teardown_msi_irq; | |
215 | msi_chip->of_node = node; | |
216 | ||
217 | armada_370_xp_msi_domain = | |
218 | irq_domain_add_linear(NULL, PCI_MSI_DOORBELL_NR, | |
219 | &armada_370_xp_msi_irq_ops, | |
220 | NULL); | |
221 | if (!armada_370_xp_msi_domain) { | |
222 | kfree(msi_chip); | |
223 | return -ENOMEM; | |
224 | } | |
225 | ||
226 | ret = of_pci_msi_chip_add(msi_chip); | |
227 | if (ret < 0) { | |
228 | irq_domain_remove(armada_370_xp_msi_domain); | |
229 | kfree(msi_chip); | |
230 | return ret; | |
231 | } | |
232 | ||
233 | reg = readl(per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS) | |
234 | | PCI_MSI_DOORBELL_MASK; | |
235 | ||
236 | writel(reg, per_cpu_int_base + | |
237 | ARMADA_370_XP_IN_DRBEL_MSK_OFFS); | |
238 | ||
239 | /* Unmask IPI interrupt */ | |
240 | writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | #else | |
245 | static inline int armada_370_xp_msi_init(struct device_node *node, | |
246 | phys_addr_t main_int_phys_base) | |
247 | { | |
248 | return 0; | |
249 | } | |
250 | #endif | |
251 | ||
344e873e | 252 | #ifdef CONFIG_SMP |
19e61d41 AE |
253 | static DEFINE_RAW_SPINLOCK(irq_controller_lock); |
254 | ||
344e873e GC |
255 | static int armada_xp_set_affinity(struct irq_data *d, |
256 | const struct cpumask *mask_val, bool force) | |
257 | { | |
3202bf01 | 258 | irq_hw_number_t hwirq = irqd_to_hwirq(d); |
8cc3cfc5 | 259 | unsigned long reg, mask; |
3202bf01 GC |
260 | int cpu; |
261 | ||
8cc3cfc5 TG |
262 | /* Select a single core from the affinity mask which is online */ |
263 | cpu = cpumask_any_and(mask_val, cpu_online_mask); | |
264 | mask = 1UL << cpu_logical_map(cpu); | |
3202bf01 GC |
265 | |
266 | raw_spin_lock(&irq_controller_lock); | |
3202bf01 | 267 | reg = readl(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq)); |
8cc3cfc5 | 268 | reg = (reg & (~ARMADA_370_XP_INT_SOURCE_CPU_MASK)) | mask; |
3202bf01 | 269 | writel(reg, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq)); |
3202bf01 GC |
270 | raw_spin_unlock(&irq_controller_lock); |
271 | ||
1dacf194 | 272 | return IRQ_SET_MASK_OK; |
344e873e GC |
273 | } |
274 | #endif | |
275 | ||
9ae6f740 TP |
276 | static struct irq_chip armada_370_xp_irq_chip = { |
277 | .name = "armada_370_xp_irq", | |
278 | .irq_mask = armada_370_xp_irq_mask, | |
279 | .irq_mask_ack = armada_370_xp_irq_mask, | |
280 | .irq_unmask = armada_370_xp_irq_unmask, | |
344e873e GC |
281 | #ifdef CONFIG_SMP |
282 | .irq_set_affinity = armada_xp_set_affinity, | |
283 | #endif | |
9ae6f740 TP |
284 | }; |
285 | ||
286 | static int armada_370_xp_mpic_irq_map(struct irq_domain *h, | |
287 | unsigned int virq, irq_hw_number_t hw) | |
288 | { | |
289 | armada_370_xp_irq_mask(irq_get_irq_data(virq)); | |
600468d0 GC |
290 | if (hw != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) |
291 | writel(hw, per_cpu_int_base + | |
292 | ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
293 | else | |
294 | writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS); | |
9ae6f740 | 295 | irq_set_status_flags(virq, IRQ_LEVEL); |
3a6f08a3 | 296 | |
7f23f62f | 297 | if (hw == ARMADA_370_XP_TIMER0_PER_CPU_IRQ) { |
3a6f08a3 GC |
298 | irq_set_percpu_devid(virq); |
299 | irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip, | |
300 | handle_percpu_devid_irq); | |
301 | ||
302 | } else { | |
303 | irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip, | |
304 | handle_level_irq); | |
305 | } | |
9ae6f740 TP |
306 | set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
d7df84b3 | 311 | static void armada_xp_mpic_smp_cpu_init(void) |
344e873e | 312 | { |
b73842b7 TP |
313 | u32 control; |
314 | int nr_irqs, i; | |
315 | ||
316 | control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL); | |
317 | nr_irqs = (control >> 2) & 0x3ff; | |
318 | ||
319 | for (i = 0; i < nr_irqs; i++) | |
320 | writel(i, per_cpu_int_base + ARMADA_370_XP_INT_SET_MASK_OFFS); | |
321 | ||
344e873e GC |
322 | /* Clear pending IPIs */ |
323 | writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); | |
324 | ||
325 | /* Enable first 8 IPIs */ | |
5ec69017 | 326 | writel(IPI_DOORBELL_MASK, per_cpu_int_base + |
344e873e GC |
327 | ARMADA_370_XP_IN_DRBEL_MSK_OFFS); |
328 | ||
329 | /* Unmask IPI interrupt */ | |
330 | writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
331 | } | |
d7df84b3 | 332 | |
933a24b0 EG |
333 | #ifdef CONFIG_SMP |
334 | static void armada_mpic_send_doorbell(const struct cpumask *mask, | |
335 | unsigned int irq) | |
336 | { | |
337 | int cpu; | |
338 | unsigned long map = 0; | |
339 | ||
340 | /* Convert our logical CPU mask into a physical one. */ | |
341 | for_each_cpu(cpu, mask) | |
342 | map |= 1 << cpu_logical_map(cpu); | |
343 | ||
344 | /* | |
345 | * Ensure that stores to Normal memory are visible to the | |
346 | * other CPUs before issuing the IPI. | |
347 | */ | |
348 | dsb(); | |
349 | ||
350 | /* submit softirq */ | |
351 | writel((map << 8) | irq, main_int_base + | |
352 | ARMADA_370_XP_SW_TRIG_INT_OFFS); | |
353 | } | |
354 | ||
d7df84b3 TP |
355 | static int armada_xp_mpic_secondary_init(struct notifier_block *nfb, |
356 | unsigned long action, void *hcpu) | |
357 | { | |
358 | if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) | |
359 | armada_xp_mpic_smp_cpu_init(); | |
5724be84 | 360 | |
d7df84b3 TP |
361 | return NOTIFY_OK; |
362 | } | |
363 | ||
364 | static struct notifier_block armada_370_xp_mpic_cpu_notifier = { | |
365 | .notifier_call = armada_xp_mpic_secondary_init, | |
366 | .priority = 100, | |
367 | }; | |
368 | ||
5724be84 MR |
369 | static int mpic_cascaded_secondary_init(struct notifier_block *nfb, |
370 | unsigned long action, void *hcpu) | |
371 | { | |
372 | if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) | |
373 | enable_percpu_irq(parent_irq, IRQ_TYPE_NONE); | |
374 | ||
375 | return NOTIFY_OK; | |
376 | } | |
377 | ||
378 | static struct notifier_block mpic_cascaded_cpu_notifier = { | |
379 | .notifier_call = mpic_cascaded_secondary_init, | |
380 | .priority = 100, | |
381 | }; | |
382 | ||
344e873e GC |
383 | #endif /* CONFIG_SMP */ |
384 | ||
9ae6f740 TP |
385 | static struct irq_domain_ops armada_370_xp_mpic_irq_ops = { |
386 | .map = armada_370_xp_mpic_irq_map, | |
387 | .xlate = irq_domain_xlate_onecell, | |
388 | }; | |
389 | ||
9b8cf779 | 390 | #ifdef CONFIG_PCI_MSI |
bc69b8ad | 391 | static void armada_370_xp_handle_msi_irq(struct pt_regs *regs, bool is_chained) |
9b8cf779 EG |
392 | { |
393 | u32 msimask, msinr; | |
394 | ||
395 | msimask = readl_relaxed(per_cpu_int_base + | |
396 | ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) | |
397 | & PCI_MSI_DOORBELL_MASK; | |
398 | ||
399 | writel(~msimask, per_cpu_int_base + | |
400 | ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); | |
401 | ||
402 | for (msinr = PCI_MSI_DOORBELL_START; | |
403 | msinr < PCI_MSI_DOORBELL_END; msinr++) { | |
404 | int irq; | |
405 | ||
406 | if (!(msimask & BIT(msinr))) | |
407 | continue; | |
408 | ||
e89c6a06 MZ |
409 | if (is_chained) { |
410 | irq = irq_find_mapping(armada_370_xp_msi_domain, | |
411 | msinr - 16); | |
bc69b8ad | 412 | generic_handle_irq(irq); |
e89c6a06 MZ |
413 | } else { |
414 | irq = msinr - 16; | |
415 | handle_domain_irq(armada_370_xp_msi_domain, | |
416 | irq, regs); | |
417 | } | |
9b8cf779 EG |
418 | } |
419 | } | |
420 | #else | |
bc69b8ad | 421 | static void armada_370_xp_handle_msi_irq(struct pt_regs *r, bool b) {} |
9b8cf779 EG |
422 | #endif |
423 | ||
bc69b8ad EG |
424 | static void armada_370_xp_mpic_handle_cascade_irq(unsigned int irq, |
425 | struct irq_desc *desc) | |
426 | { | |
427 | struct irq_chip *chip = irq_get_chip(irq); | |
758e8366 | 428 | unsigned long irqmap, irqn, irqsrc, cpuid; |
bc69b8ad EG |
429 | unsigned int cascade_irq; |
430 | ||
431 | chained_irq_enter(chip, desc); | |
432 | ||
433 | irqmap = readl_relaxed(per_cpu_int_base + ARMADA_375_PPI_CAUSE); | |
758e8366 | 434 | cpuid = cpu_logical_map(smp_processor_id()); |
bc69b8ad EG |
435 | |
436 | for_each_set_bit(irqn, &irqmap, BITS_PER_LONG) { | |
758e8366 GJ |
437 | irqsrc = readl_relaxed(main_int_base + |
438 | ARMADA_370_XP_INT_SOURCE_CTL(irqn)); | |
439 | ||
440 | /* Check if the interrupt is not masked on current CPU. | |
441 | * Test IRQ (0-1) and FIQ (8-9) mask bits. | |
442 | */ | |
443 | if (!(irqsrc & ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid))) | |
444 | continue; | |
445 | ||
446 | if (irqn == 1) { | |
447 | armada_370_xp_handle_msi_irq(NULL, true); | |
448 | continue; | |
449 | } | |
450 | ||
bc69b8ad EG |
451 | cascade_irq = irq_find_mapping(armada_370_xp_mpic_domain, irqn); |
452 | generic_handle_irq(cascade_irq); | |
453 | } | |
454 | ||
455 | chained_irq_exit(chip, desc); | |
456 | } | |
457 | ||
8783dd3a | 458 | static void __exception_irq_entry |
9339d432 | 459 | armada_370_xp_handle_irq(struct pt_regs *regs) |
9ae6f740 TP |
460 | { |
461 | u32 irqstat, irqnr; | |
462 | ||
463 | do { | |
464 | irqstat = readl_relaxed(per_cpu_int_base + | |
465 | ARMADA_370_XP_CPU_INTACK_OFFS); | |
466 | irqnr = irqstat & 0x3FF; | |
467 | ||
344e873e GC |
468 | if (irqnr > 1022) |
469 | break; | |
470 | ||
31f614ed | 471 | if (irqnr > 1) { |
e89c6a06 MZ |
472 | handle_domain_irq(armada_370_xp_mpic_domain, |
473 | irqnr, regs); | |
9ae6f740 TP |
474 | continue; |
475 | } | |
31f614ed | 476 | |
31f614ed | 477 | /* MSI handling */ |
9b8cf779 | 478 | if (irqnr == 1) |
bc69b8ad | 479 | armada_370_xp_handle_msi_irq(regs, false); |
31f614ed | 480 | |
344e873e GC |
481 | #ifdef CONFIG_SMP |
482 | /* IPI Handling */ | |
483 | if (irqnr == 0) { | |
484 | u32 ipimask, ipinr; | |
485 | ||
486 | ipimask = readl_relaxed(per_cpu_int_base + | |
487 | ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) | |
5ec69017 | 488 | & IPI_DOORBELL_MASK; |
344e873e | 489 | |
a6f089e9 | 490 | writel(~ipimask, per_cpu_int_base + |
344e873e GC |
491 | ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); |
492 | ||
493 | /* Handle all pending doorbells */ | |
5ec69017 TP |
494 | for (ipinr = IPI_DOORBELL_START; |
495 | ipinr < IPI_DOORBELL_END; ipinr++) { | |
344e873e GC |
496 | if (ipimask & (0x1 << ipinr)) |
497 | handle_IPI(ipinr, regs); | |
498 | } | |
499 | continue; | |
500 | } | |
501 | #endif | |
9ae6f740 | 502 | |
9ae6f740 TP |
503 | } while (1); |
504 | } | |
505 | ||
0f077eb5 TP |
506 | static int armada_370_xp_mpic_suspend(void) |
507 | { | |
508 | doorbell_mask_reg = readl(per_cpu_int_base + | |
509 | ARMADA_370_XP_IN_DRBEL_MSK_OFFS); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static void armada_370_xp_mpic_resume(void) | |
514 | { | |
515 | int nirqs; | |
516 | irq_hw_number_t irq; | |
517 | ||
518 | /* Re-enable interrupts */ | |
519 | nirqs = (readl(main_int_base + ARMADA_370_XP_INT_CONTROL) >> 2) & 0x3ff; | |
520 | for (irq = 0; irq < nirqs; irq++) { | |
521 | struct irq_data *data; | |
522 | int virq; | |
523 | ||
524 | virq = irq_linear_revmap(armada_370_xp_mpic_domain, irq); | |
525 | if (virq == 0) | |
526 | continue; | |
527 | ||
528 | if (irq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) | |
529 | writel(irq, per_cpu_int_base + | |
530 | ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
531 | else | |
532 | writel(irq, main_int_base + | |
533 | ARMADA_370_XP_INT_SET_ENABLE_OFFS); | |
534 | ||
535 | data = irq_get_irq_data(virq); | |
536 | if (!irqd_irq_disabled(data)) | |
537 | armada_370_xp_irq_unmask(data); | |
538 | } | |
539 | ||
540 | /* Reconfigure doorbells for IPIs and MSIs */ | |
541 | writel(doorbell_mask_reg, | |
542 | per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS); | |
543 | if (doorbell_mask_reg & IPI_DOORBELL_MASK) | |
544 | writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
545 | if (doorbell_mask_reg & PCI_MSI_DOORBELL_MASK) | |
546 | writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); | |
547 | } | |
548 | ||
549 | struct syscore_ops armada_370_xp_mpic_syscore_ops = { | |
550 | .suspend = armada_370_xp_mpic_suspend, | |
551 | .resume = armada_370_xp_mpic_resume, | |
552 | }; | |
553 | ||
b313ada8 TP |
554 | static int __init armada_370_xp_mpic_of_init(struct device_node *node, |
555 | struct device_node *parent) | |
9ae6f740 | 556 | { |
627dfcc2 | 557 | struct resource main_int_res, per_cpu_int_res; |
5724be84 | 558 | int nr_irqs, i; |
b313ada8 TP |
559 | u32 control; |
560 | ||
627dfcc2 TP |
561 | BUG_ON(of_address_to_resource(node, 0, &main_int_res)); |
562 | BUG_ON(of_address_to_resource(node, 1, &per_cpu_int_res)); | |
b313ada8 | 563 | |
627dfcc2 TP |
564 | BUG_ON(!request_mem_region(main_int_res.start, |
565 | resource_size(&main_int_res), | |
566 | node->full_name)); | |
567 | BUG_ON(!request_mem_region(per_cpu_int_res.start, | |
568 | resource_size(&per_cpu_int_res), | |
569 | node->full_name)); | |
570 | ||
571 | main_int_base = ioremap(main_int_res.start, | |
572 | resource_size(&main_int_res)); | |
b313ada8 | 573 | BUG_ON(!main_int_base); |
627dfcc2 TP |
574 | |
575 | per_cpu_int_base = ioremap(per_cpu_int_res.start, | |
576 | resource_size(&per_cpu_int_res)); | |
b313ada8 TP |
577 | BUG_ON(!per_cpu_int_base); |
578 | ||
579 | control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL); | |
b73842b7 TP |
580 | nr_irqs = (control >> 2) & 0x3ff; |
581 | ||
582 | for (i = 0; i < nr_irqs; i++) | |
583 | writel(i, main_int_base + ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS); | |
b313ada8 TP |
584 | |
585 | armada_370_xp_mpic_domain = | |
b73842b7 | 586 | irq_domain_add_linear(node, nr_irqs, |
b313ada8 TP |
587 | &armada_370_xp_mpic_irq_ops, NULL); |
588 | ||
627dfcc2 | 589 | BUG_ON(!armada_370_xp_mpic_domain); |
b313ada8 | 590 | |
933a24b0 | 591 | /* Setup for the boot CPU */ |
b313ada8 | 592 | armada_xp_mpic_smp_cpu_init(); |
b313ada8 | 593 | |
31f614ed TP |
594 | armada_370_xp_msi_init(node, main_int_res.start); |
595 | ||
bc69b8ad EG |
596 | parent_irq = irq_of_parse_and_map(node, 0); |
597 | if (parent_irq <= 0) { | |
598 | irq_set_default_host(armada_370_xp_mpic_domain); | |
599 | set_handle_irq(armada_370_xp_handle_irq); | |
ef37d337 TP |
600 | #ifdef CONFIG_SMP |
601 | set_smp_cross_call(armada_mpic_send_doorbell); | |
d7df84b3 | 602 | register_cpu_notifier(&armada_370_xp_mpic_cpu_notifier); |
ef37d337 | 603 | #endif |
bc69b8ad | 604 | } else { |
5724be84 MR |
605 | #ifdef CONFIG_SMP |
606 | register_cpu_notifier(&mpic_cascaded_cpu_notifier); | |
607 | #endif | |
bc69b8ad EG |
608 | irq_set_chained_handler(parent_irq, |
609 | armada_370_xp_mpic_handle_cascade_irq); | |
610 | } | |
b313ada8 | 611 | |
0f077eb5 TP |
612 | register_syscore_ops(&armada_370_xp_mpic_syscore_ops); |
613 | ||
b313ada8 | 614 | return 0; |
9ae6f740 | 615 | } |
b313ada8 | 616 | |
9339d432 | 617 | IRQCHIP_DECLARE(armada_370_xp_mpic, "marvell,mpic", armada_370_xp_mpic_of_init); |