1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
6 #define pr_fmt(fmt) "%s: " fmt, __func__
8 #include <linux/kernel.h>
9 #include <linux/interrupt.h>
10 #include <linux/irqchip/chained_irq.h>
11 #include <linux/irq.h>
12 #include <linux/irqdomain.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/err.h>
17 #include <linux/ssbi.h>
18 #include <linux/regmap.h>
19 #include <linux/of_platform.h>
20 #include <linux/mfd/core.h>
22 #define SSBI_REG_ADDR_IRQ_BASE 0x1BB
24 #define SSBI_REG_ADDR_IRQ_ROOT (SSBI_REG_ADDR_IRQ_BASE + 0)
25 #define SSBI_REG_ADDR_IRQ_M_STATUS1 (SSBI_REG_ADDR_IRQ_BASE + 1)
26 #define SSBI_REG_ADDR_IRQ_M_STATUS2 (SSBI_REG_ADDR_IRQ_BASE + 2)
27 #define SSBI_REG_ADDR_IRQ_M_STATUS3 (SSBI_REG_ADDR_IRQ_BASE + 3)
28 #define SSBI_REG_ADDR_IRQ_M_STATUS4 (SSBI_REG_ADDR_IRQ_BASE + 4)
29 #define SSBI_REG_ADDR_IRQ_BLK_SEL (SSBI_REG_ADDR_IRQ_BASE + 5)
30 #define SSBI_REG_ADDR_IRQ_IT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 6)
31 #define SSBI_REG_ADDR_IRQ_CONFIG (SSBI_REG_ADDR_IRQ_BASE + 7)
32 #define SSBI_REG_ADDR_IRQ_RT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 8)
34 #define PM8821_SSBI_REG_ADDR_IRQ_BASE 0x100
35 #define PM8821_SSBI_REG_ADDR_IRQ_MASTER0 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0x30)
36 #define PM8821_SSBI_REG_ADDR_IRQ_MASTER1 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0xb0)
37 #define PM8821_SSBI_REG(m, b, offset) \
39 (PM8821_SSBI_REG_ADDR_IRQ_MASTER0 + b + offset) : \
40 (PM8821_SSBI_REG_ADDR_IRQ_MASTER1 + b + offset))
41 #define PM8821_SSBI_ADDR_IRQ_ROOT(m, b) PM8821_SSBI_REG(m, b, 0x0)
42 #define PM8821_SSBI_ADDR_IRQ_CLEAR(m, b) PM8821_SSBI_REG(m, b, 0x01)
43 #define PM8821_SSBI_ADDR_IRQ_MASK(m, b) PM8821_SSBI_REG(m, b, 0x08)
44 #define PM8821_SSBI_ADDR_IRQ_RT_STATUS(m, b) PM8821_SSBI_REG(m, b, 0x0f)
46 #define PM8821_BLOCKS_PER_MASTER 7
48 #define PM_IRQF_LVL_SEL 0x01 /* level select */
49 #define PM_IRQF_MASK_FE 0x02 /* mask falling edge */
50 #define PM_IRQF_MASK_RE 0x04 /* mask rising edge */
51 #define PM_IRQF_CLR 0x08 /* clear interrupt */
52 #define PM_IRQF_BITS_MASK 0x70
53 #define PM_IRQF_BITS_SHIFT 4
54 #define PM_IRQF_WRITE 0x80
56 #define PM_IRQF_MASK_ALL (PM_IRQF_MASK_FE | \
59 #define REG_HWREV 0x002 /* PMIC4 revision */
60 #define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */
62 #define PM8XXX_NR_IRQS 256
63 #define PM8821_NR_IRQS 112
67 struct irq_chip
*irq_chip
;
68 irq_handler_t irq_handler
;
72 struct regmap
*regmap
;
73 spinlock_t pm_irq_lock
;
74 struct irq_domain
*irqdomain
;
75 unsigned int num_blocks
;
76 unsigned int num_masters
;
77 const struct pm_irq_data
*pm_irq_data
;
78 /* MUST BE AT THE END OF THIS STRUCT */
82 static int pm8xxx_read_block_irq(struct pm_irq_chip
*chip
, unsigned int bp
,
87 spin_lock(&chip
->pm_irq_lock
);
88 rc
= regmap_write(chip
->regmap
, SSBI_REG_ADDR_IRQ_BLK_SEL
, bp
);
90 pr_err("Failed Selecting Block %d rc=%d\n", bp
, rc
);
94 rc
= regmap_read(chip
->regmap
, SSBI_REG_ADDR_IRQ_IT_STATUS
, ip
);
96 pr_err("Failed Reading Status rc=%d\n", rc
);
98 spin_unlock(&chip
->pm_irq_lock
);
103 pm8xxx_config_irq(struct pm_irq_chip
*chip
, unsigned int bp
, unsigned int cp
)
108 spin_lock_irqsave(&chip
->pm_irq_lock
, flags
);
109 rc
= regmap_write(chip
->regmap
, SSBI_REG_ADDR_IRQ_BLK_SEL
, bp
);
111 pr_err("Failed Selecting Block %d rc=%d\n", bp
, rc
);
116 rc
= regmap_write(chip
->regmap
, SSBI_REG_ADDR_IRQ_CONFIG
, cp
);
118 pr_err("Failed Configuring IRQ rc=%d\n", rc
);
120 spin_unlock_irqrestore(&chip
->pm_irq_lock
, flags
);
124 static int pm8xxx_irq_block_handler(struct pm_irq_chip
*chip
, int block
)
126 int pmirq
, i
, ret
= 0;
129 ret
= pm8xxx_read_block_irq(chip
, block
, &bits
);
131 pr_err("Failed reading %d block ret=%d", block
, ret
);
135 pr_err("block bit set in master but no irqs: %d", block
);
140 for (i
= 0; i
< 8; i
++) {
141 if (bits
& (1 << i
)) {
142 pmirq
= block
* 8 + i
;
143 generic_handle_domain_irq(chip
->irqdomain
, pmirq
);
149 static int pm8xxx_irq_master_handler(struct pm_irq_chip
*chip
, int master
)
151 unsigned int blockbits
;
152 int block_number
, i
, ret
= 0;
154 ret
= regmap_read(chip
->regmap
, SSBI_REG_ADDR_IRQ_M_STATUS1
+ master
,
157 pr_err("Failed to read master %d ret=%d\n", master
, ret
);
161 pr_err("master bit set in root but no blocks: %d", master
);
165 for (i
= 0; i
< 8; i
++)
166 if (blockbits
& (1 << i
)) {
167 block_number
= master
* 8 + i
; /* block # */
168 ret
|= pm8xxx_irq_block_handler(chip
, block_number
);
173 static irqreturn_t
pm8xxx_irq_handler(int irq
, void *data
)
175 struct pm_irq_chip
*chip
= data
;
177 int i
, ret
, masters
= 0;
179 ret
= regmap_read(chip
->regmap
, SSBI_REG_ADDR_IRQ_ROOT
, &root
);
181 pr_err("Can't read root status ret=%d\n", ret
);
185 /* on pm8xxx series masters start from bit 1 of the root */
188 /* Read allowed masters for blocks. */
189 for (i
= 0; i
< chip
->num_masters
; i
++)
190 if (masters
& (1 << i
))
191 pm8xxx_irq_master_handler(chip
, i
);
196 static void pm8821_irq_block_handler(struct pm_irq_chip
*chip
,
197 int master
, int block
)
202 ret
= regmap_read(chip
->regmap
,
203 PM8821_SSBI_ADDR_IRQ_ROOT(master
, block
), &bits
);
205 pr_err("Reading block %d failed ret=%d", block
, ret
);
209 /* Convert block offset to global block number */
210 block
+= (master
* PM8821_BLOCKS_PER_MASTER
) - 1;
213 for (i
= 0; i
< 8; i
++) {
215 pmirq
= block
* 8 + i
;
216 generic_handle_domain_irq(chip
->irqdomain
, pmirq
);
221 static inline void pm8821_irq_master_handler(struct pm_irq_chip
*chip
,
222 int master
, u8 master_val
)
226 for (block
= 1; block
< 8; block
++)
227 if (master_val
& BIT(block
))
228 pm8821_irq_block_handler(chip
, master
, block
);
231 static irqreturn_t
pm8821_irq_handler(int irq
, void *data
)
233 struct pm_irq_chip
*chip
= data
;
237 ret
= regmap_read(chip
->regmap
,
238 PM8821_SSBI_REG_ADDR_IRQ_MASTER0
, &master
);
240 pr_err("Failed to read master 0 ret=%d\n", ret
);
244 /* bits 1 through 7 marks the first 7 blocks in master 0 */
245 if (master
& GENMASK(7, 1))
246 pm8821_irq_master_handler(chip
, 0, master
);
248 /* bit 0 marks if master 1 contains any bits */
249 if (!(master
& BIT(0)))
252 ret
= regmap_read(chip
->regmap
,
253 PM8821_SSBI_REG_ADDR_IRQ_MASTER1
, &master
);
255 pr_err("Failed to read master 1 ret=%d\n", ret
);
259 pm8821_irq_master_handler(chip
, 1, master
);
264 static void pm8xxx_irq_mask_ack(struct irq_data
*d
)
266 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
267 unsigned int pmirq
= irqd_to_hwirq(d
);
272 config
= chip
->config
[pmirq
] | PM_IRQF_MASK_ALL
| PM_IRQF_CLR
;
273 pm8xxx_config_irq(chip
, block
, config
);
276 static void pm8xxx_irq_unmask(struct irq_data
*d
)
278 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
279 unsigned int pmirq
= irqd_to_hwirq(d
);
284 config
= chip
->config
[pmirq
];
285 pm8xxx_config_irq(chip
, block
, config
);
288 static int pm8xxx_irq_set_type(struct irq_data
*d
, unsigned int flow_type
)
290 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
291 unsigned int pmirq
= irqd_to_hwirq(d
);
298 chip
->config
[pmirq
] = (irq_bit
<< PM_IRQF_BITS_SHIFT
)
300 if (flow_type
& (IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
)) {
301 if (flow_type
& IRQF_TRIGGER_RISING
)
302 chip
->config
[pmirq
] &= ~PM_IRQF_MASK_RE
;
303 if (flow_type
& IRQF_TRIGGER_FALLING
)
304 chip
->config
[pmirq
] &= ~PM_IRQF_MASK_FE
;
306 chip
->config
[pmirq
] |= PM_IRQF_LVL_SEL
;
308 if (flow_type
& IRQF_TRIGGER_HIGH
)
309 chip
->config
[pmirq
] &= ~PM_IRQF_MASK_RE
;
311 chip
->config
[pmirq
] &= ~PM_IRQF_MASK_FE
;
314 config
= chip
->config
[pmirq
] | PM_IRQF_CLR
;
315 return pm8xxx_config_irq(chip
, block
, config
);
318 static int pm8xxx_irq_get_irqchip_state(struct irq_data
*d
,
319 enum irqchip_irq_state which
,
322 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
323 unsigned int pmirq
= irqd_to_hwirq(d
);
330 if (which
!= IRQCHIP_STATE_LINE_LEVEL
)
336 spin_lock_irqsave(&chip
->pm_irq_lock
, flags
);
337 rc
= regmap_write(chip
->regmap
, SSBI_REG_ADDR_IRQ_BLK_SEL
, block
);
339 pr_err("Failed Selecting Block %d rc=%d\n", block
, rc
);
343 rc
= regmap_read(chip
->regmap
, SSBI_REG_ADDR_IRQ_RT_STATUS
, &bits
);
345 pr_err("Failed Reading Status rc=%d\n", rc
);
349 *state
= !!(bits
& BIT(irq_bit
));
351 spin_unlock_irqrestore(&chip
->pm_irq_lock
, flags
);
356 static struct irq_chip pm8xxx_irq_chip
= {
358 .irq_mask_ack
= pm8xxx_irq_mask_ack
,
359 .irq_unmask
= pm8xxx_irq_unmask
,
360 .irq_set_type
= pm8xxx_irq_set_type
,
361 .irq_get_irqchip_state
= pm8xxx_irq_get_irqchip_state
,
362 .flags
= IRQCHIP_MASK_ON_SUSPEND
| IRQCHIP_SKIP_SET_WAKE
,
365 static void pm8xxx_irq_domain_map(struct pm_irq_chip
*chip
,
366 struct irq_domain
*domain
, unsigned int irq
,
367 irq_hw_number_t hwirq
, unsigned int type
)
369 irq_domain_set_info(domain
, irq
, hwirq
, chip
->pm_irq_data
->irq_chip
,
370 chip
, handle_level_irq
, NULL
, NULL
);
371 irq_set_noprobe(irq
);
374 static int pm8xxx_irq_domain_alloc(struct irq_domain
*domain
, unsigned int virq
,
375 unsigned int nr_irqs
, void *data
)
377 struct pm_irq_chip
*chip
= domain
->host_data
;
378 struct irq_fwspec
*fwspec
= data
;
379 irq_hw_number_t hwirq
;
383 ret
= irq_domain_translate_twocell(domain
, fwspec
, &hwirq
, &type
);
387 for (i
= 0; i
< nr_irqs
; i
++)
388 pm8xxx_irq_domain_map(chip
, domain
, virq
+ i
, hwirq
+ i
, type
);
393 static const struct irq_domain_ops pm8xxx_irq_domain_ops
= {
394 .alloc
= pm8xxx_irq_domain_alloc
,
395 .free
= irq_domain_free_irqs_common
,
396 .translate
= irq_domain_translate_twocell
,
399 static void pm8821_irq_mask_ack(struct irq_data
*d
)
401 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
402 unsigned int pmirq
= irqd_to_hwirq(d
);
407 master
= block
/ PM8821_BLOCKS_PER_MASTER
;
409 block
%= PM8821_BLOCKS_PER_MASTER
;
411 rc
= regmap_update_bits(chip
->regmap
,
412 PM8821_SSBI_ADDR_IRQ_MASK(master
, block
),
413 BIT(irq_bit
), BIT(irq_bit
));
415 pr_err("Failed to mask IRQ:%d rc=%d\n", pmirq
, rc
);
419 rc
= regmap_update_bits(chip
->regmap
,
420 PM8821_SSBI_ADDR_IRQ_CLEAR(master
, block
),
421 BIT(irq_bit
), BIT(irq_bit
));
423 pr_err("Failed to CLEAR IRQ:%d rc=%d\n", pmirq
, rc
);
426 static void pm8821_irq_unmask(struct irq_data
*d
)
428 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
429 unsigned int pmirq
= irqd_to_hwirq(d
);
434 master
= block
/ PM8821_BLOCKS_PER_MASTER
;
436 block
%= PM8821_BLOCKS_PER_MASTER
;
438 rc
= regmap_update_bits(chip
->regmap
,
439 PM8821_SSBI_ADDR_IRQ_MASK(master
, block
),
440 BIT(irq_bit
), ~BIT(irq_bit
));
442 pr_err("Failed to read/write unmask IRQ:%d rc=%d\n", pmirq
, rc
);
446 static int pm8821_irq_get_irqchip_state(struct irq_data
*d
,
447 enum irqchip_irq_state which
,
450 struct pm_irq_chip
*chip
= irq_data_get_irq_chip_data(d
);
451 int rc
, pmirq
= irqd_to_hwirq(d
);
452 u8 block
, irq_bit
, master
;
456 master
= block
/ PM8821_BLOCKS_PER_MASTER
;
458 block
%= PM8821_BLOCKS_PER_MASTER
;
460 rc
= regmap_read(chip
->regmap
,
461 PM8821_SSBI_ADDR_IRQ_RT_STATUS(master
, block
), &bits
);
463 pr_err("Reading Status of IRQ %d failed rc=%d\n", pmirq
, rc
);
467 *state
= !!(bits
& BIT(irq_bit
));
472 static struct irq_chip pm8821_irq_chip
= {
474 .irq_mask_ack
= pm8821_irq_mask_ack
,
475 .irq_unmask
= pm8821_irq_unmask
,
476 .irq_get_irqchip_state
= pm8821_irq_get_irqchip_state
,
477 .flags
= IRQCHIP_MASK_ON_SUSPEND
| IRQCHIP_SKIP_SET_WAKE
,
480 static const struct regmap_config ssbi_regmap_config
= {
483 .max_register
= 0x3ff,
485 .reg_read
= ssbi_reg_read
,
486 .reg_write
= ssbi_reg_write
489 static const struct pm_irq_data pm8xxx_data
= {
490 .num_irqs
= PM8XXX_NR_IRQS
,
491 .irq_chip
= &pm8xxx_irq_chip
,
492 .irq_handler
= pm8xxx_irq_handler
,
495 static const struct pm_irq_data pm8821_data
= {
496 .num_irqs
= PM8821_NR_IRQS
,
497 .irq_chip
= &pm8821_irq_chip
,
498 .irq_handler
= pm8821_irq_handler
,
501 static const struct of_device_id pm8xxx_id_table
[] = {
502 { .compatible
= "qcom,pm8058", .data
= &pm8xxx_data
},
503 { .compatible
= "qcom,pm8821", .data
= &pm8821_data
},
504 { .compatible
= "qcom,pm8921", .data
= &pm8xxx_data
},
507 MODULE_DEVICE_TABLE(of
, pm8xxx_id_table
);
509 static int pm8xxx_probe(struct platform_device
*pdev
)
511 const struct pm_irq_data
*data
;
512 struct regmap
*regmap
;
515 struct pm_irq_chip
*chip
;
517 data
= of_device_get_match_data(&pdev
->dev
);
519 dev_err(&pdev
->dev
, "No matching driver data found\n");
523 irq
= platform_get_irq(pdev
, 0);
527 regmap
= devm_regmap_init(&pdev
->dev
, NULL
, pdev
->dev
.parent
,
528 &ssbi_regmap_config
);
530 return PTR_ERR(regmap
);
532 /* Read PMIC chip revision */
533 rc
= regmap_read(regmap
, REG_HWREV
, &val
);
535 pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV
, rc
);
538 pr_info("PMIC revision 1: %02X\n", val
);
540 /* Read PMIC chip revision 2 */
541 rc
= regmap_read(regmap
, REG_HWREV_2
, &val
);
543 pr_err("Failed to read hw rev 2 reg %d:rc=%d\n",
547 pr_info("PMIC revision 2: %02X\n", val
);
549 chip
= devm_kzalloc(&pdev
->dev
,
550 struct_size(chip
, config
, data
->num_irqs
),
555 platform_set_drvdata(pdev
, chip
);
556 chip
->regmap
= regmap
;
557 chip
->num_blocks
= DIV_ROUND_UP(data
->num_irqs
, 8);
558 chip
->num_masters
= DIV_ROUND_UP(chip
->num_blocks
, 8);
559 chip
->pm_irq_data
= data
;
560 spin_lock_init(&chip
->pm_irq_lock
);
562 chip
->irqdomain
= irq_domain_add_linear(pdev
->dev
.of_node
,
564 &pm8xxx_irq_domain_ops
,
566 if (!chip
->irqdomain
)
569 rc
= devm_request_irq(&pdev
->dev
, irq
, data
->irq_handler
, 0, dev_name(&pdev
->dev
), chip
);
573 irq_set_irq_wake(irq
, 1);
575 rc
= of_platform_populate(pdev
->dev
.of_node
, NULL
, NULL
, &pdev
->dev
);
577 irq_domain_remove(chip
->irqdomain
);
582 static int pm8xxx_remove_child(struct device
*dev
, void *unused
)
584 platform_device_unregister(to_platform_device(dev
));
588 static void pm8xxx_remove(struct platform_device
*pdev
)
590 struct pm_irq_chip
*chip
= platform_get_drvdata(pdev
);
592 device_for_each_child(&pdev
->dev
, NULL
, pm8xxx_remove_child
);
593 irq_domain_remove(chip
->irqdomain
);
596 static struct platform_driver pm8xxx_driver
= {
597 .probe
= pm8xxx_probe
,
598 .remove
= pm8xxx_remove
,
600 .name
= "pm8xxx-core",
601 .of_match_table
= pm8xxx_id_table
,
605 static int __init
pm8xxx_init(void)
607 return platform_driver_register(&pm8xxx_driver
);
609 subsys_initcall(pm8xxx_init
);
611 static void __exit
pm8xxx_exit(void)
613 platform_driver_unregister(&pm8xxx_driver
);
615 module_exit(pm8xxx_exit
);
617 MODULE_LICENSE("GPL v2");
618 MODULE_DESCRIPTION("PMIC 8xxx core driver");
619 MODULE_VERSION("1.0");
620 MODULE_ALIAS("platform:pm8xxx-core");