1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Interrupt driver for RICOH583 power management chip.
4 *
5 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
6 * Author: Laxman dewangan <ldewangan@nvidia.com>
7 *
8 * based on code
9 * Copyright (C) 2011 RICOH COMPANY,LTD
10 */
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/i2c.h>
14 #include <linux/mfd/rc5t583.h>
15
16 enum int_type {
17 SYS_INT = 0x1,
18 DCDC_INT = 0x2,
19 RTC_INT = 0x4,
20 ADC_INT = 0x8,
21 GPIO_INT = 0x10,
22 };
23
24 static int gpedge_add[] = {
25 RC5T583_GPIO_GPEDGE2,
26 RC5T583_GPIO_GPEDGE2
27 };
28
29 static int irq_en_add[] = {
30 RC5T583_INT_EN_SYS1,
31 RC5T583_INT_EN_SYS2,
32 RC5T583_INT_EN_DCDC,
33 RC5T583_INT_EN_RTC,
34 RC5T583_INT_EN_ADC1,
35 RC5T583_INT_EN_ADC2,
36 RC5T583_INT_EN_ADC3,
37 RC5T583_GPIO_EN_INT
38 };
39
40 static int irq_mon_add[] = {
41 RC5T583_INT_MON_SYS1,
42 RC5T583_INT_MON_SYS2,
43 RC5T583_INT_MON_DCDC,
44 RC5T583_INT_MON_RTC,
45 RC5T583_INT_IR_ADCL,
46 RC5T583_INT_IR_ADCH,
47 RC5T583_INT_IR_ADCEND,
48 RC5T583_INT_IR_GPIOF,
49 RC5T583_INT_IR_GPIOR
50 };
51
52 static int irq_clr_add[] = {
53 RC5T583_INT_IR_SYS1,
54 RC5T583_INT_IR_SYS2,
55 RC5T583_INT_IR_DCDC,
56 RC5T583_INT_IR_RTC,
57 RC5T583_INT_IR_ADCL,
58 RC5T583_INT_IR_ADCH,
59 RC5T583_INT_IR_ADCEND,
60 RC5T583_INT_IR_GPIOF,
61 RC5T583_INT_IR_GPIOR
62 };
63
64 static int main_int_type[] = {
65 SYS_INT,
66 SYS_INT,
67 DCDC_INT,
68 RTC_INT,
69 ADC_INT,
70 ADC_INT,
71 ADC_INT,
72 GPIO_INT,
73 GPIO_INT,
74 };
75
76 struct rc5t583_irq_data {
77 u8 int_type;
78 u8 master_bit;
79 u8 int_en_bit;
80 u8 mask_reg_index;
81 int grp_index;
82 };
83
84 #define RC5T583_IRQ(_int_type, _master_bit, _grp_index, \
85 _int_bit, _mask_ind) \
86 { \
87 .int_type = _int_type, \
88 .master_bit = _master_bit, \
89 .grp_index = _grp_index, \
90 .int_en_bit = _int_bit, \
91 .mask_reg_index = _mask_ind, \
92 }
93
94 static const struct rc5t583_irq_data rc5t583_irqs[RC5T583_MAX_IRQS] = {
95 [RC5T583_IRQ_ONKEY] = RC5T583_IRQ(SYS_INT, 0, 0, 0, 0),
96 [RC5T583_IRQ_ACOK] = RC5T583_IRQ(SYS_INT, 0, 1, 1, 0),
97 [RC5T583_IRQ_LIDOPEN] = RC5T583_IRQ(SYS_INT, 0, 2, 2, 0),
98 [RC5T583_IRQ_PREOT] = RC5T583_IRQ(SYS_INT, 0, 3, 3, 0),
99 [RC5T583_IRQ_CLKSTP] = RC5T583_IRQ(SYS_INT, 0, 4, 4, 0),
100 [RC5T583_IRQ_ONKEY_OFF] = RC5T583_IRQ(SYS_INT, 0, 5, 5, 0),
101 [RC5T583_IRQ_WD] = RC5T583_IRQ(SYS_INT, 0, 7, 7, 0),
102 [RC5T583_IRQ_EN_PWRREQ1] = RC5T583_IRQ(SYS_INT, 0, 8, 0, 1),
103 [RC5T583_IRQ_EN_PWRREQ2] = RC5T583_IRQ(SYS_INT, 0, 9, 1, 1),
104 [RC5T583_IRQ_PRE_VINDET] = RC5T583_IRQ(SYS_INT, 0, 10, 2, 1),
105
106 [RC5T583_IRQ_DC0LIM] = RC5T583_IRQ(DCDC_INT, 1, 0, 0, 2),
107 [RC5T583_IRQ_DC1LIM] = RC5T583_IRQ(DCDC_INT, 1, 1, 1, 2),
108 [RC5T583_IRQ_DC2LIM] = RC5T583_IRQ(DCDC_INT, 1, 2, 2, 2),
109 [RC5T583_IRQ_DC3LIM] = RC5T583_IRQ(DCDC_INT, 1, 3, 3, 2),
110
111 [RC5T583_IRQ_CTC] = RC5T583_IRQ(RTC_INT, 2, 0, 0, 3),
112 [RC5T583_IRQ_YALE] = RC5T583_IRQ(RTC_INT, 2, 5, 5, 3),
113 [RC5T583_IRQ_DALE] = RC5T583_IRQ(RTC_INT, 2, 6, 6, 3),
114 [RC5T583_IRQ_WALE] = RC5T583_IRQ(RTC_INT, 2, 7, 7, 3),
115
116 [RC5T583_IRQ_AIN1L] = RC5T583_IRQ(ADC_INT, 3, 0, 0, 4),
117 [RC5T583_IRQ_AIN2L] = RC5T583_IRQ(ADC_INT, 3, 1, 1, 4),
118 [RC5T583_IRQ_AIN3L] = RC5T583_IRQ(ADC_INT, 3, 2, 2, 4),
119 [RC5T583_IRQ_VBATL] = RC5T583_IRQ(ADC_INT, 3, 3, 3, 4),
120 [RC5T583_IRQ_VIN3L] = RC5T583_IRQ(ADC_INT, 3, 4, 4, 4),
121 [RC5T583_IRQ_VIN8L] = RC5T583_IRQ(ADC_INT, 3, 5, 5, 4),
122 [RC5T583_IRQ_AIN1H] = RC5T583_IRQ(ADC_INT, 3, 6, 0, 5),
123 [RC5T583_IRQ_AIN2H] = RC5T583_IRQ(ADC_INT, 3, 7, 1, 5),
124 [RC5T583_IRQ_AIN3H] = RC5T583_IRQ(ADC_INT, 3, 8, 2, 5),
125 [RC5T583_IRQ_VBATH] = RC5T583_IRQ(ADC_INT, 3, 9, 3, 5),
126 [RC5T583_IRQ_VIN3H] = RC5T583_IRQ(ADC_INT, 3, 10, 4, 5),
127 [RC5T583_IRQ_VIN8H] = RC5T583_IRQ(ADC_INT, 3, 11, 5, 5),
128 [RC5T583_IRQ_ADCEND] = RC5T583_IRQ(ADC_INT, 3, 12, 0, 6),
129
130 [RC5T583_IRQ_GPIO0] = RC5T583_IRQ(GPIO_INT, 4, 0, 0, 7),
131 [RC5T583_IRQ_GPIO1] = RC5T583_IRQ(GPIO_INT, 4, 1, 1, 7),
132 [RC5T583_IRQ_GPIO2] = RC5T583_IRQ(GPIO_INT, 4, 2, 2, 7),
133 [RC5T583_IRQ_GPIO3] = RC5T583_IRQ(GPIO_INT, 4, 3, 3, 7),
134 [RC5T583_IRQ_GPIO4] = RC5T583_IRQ(GPIO_INT, 4, 4, 4, 7),
135 [RC5T583_IRQ_GPIO5] = RC5T583_IRQ(GPIO_INT, 4, 5, 5, 7),
136 [RC5T583_IRQ_GPIO6] = RC5T583_IRQ(GPIO_INT, 4, 6, 6, 7),
137 [RC5T583_IRQ_GPIO7] = RC5T583_IRQ(GPIO_INT, 4, 7, 7, 7),
138 };
139
rc5t583_irq_lock(struct irq_data * irq_data)140 static void rc5t583_irq_lock(struct irq_data *irq_data)
141 {
142 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
143 mutex_lock(&rc5t583->irq_lock);
144 }
145
rc5t583_irq_unmask(struct irq_data * irq_data)146 static void rc5t583_irq_unmask(struct irq_data *irq_data)
147 {
148 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
149 unsigned int __irq = irq_data->irq - rc5t583->irq_base;
150 const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
151
152 rc5t583->group_irq_en[data->grp_index] |= 1 << data->grp_index;
153 rc5t583->intc_inten_reg |= 1 << data->master_bit;
154 rc5t583->irq_en_reg[data->mask_reg_index] |= 1 << data->int_en_bit;
155 }
156
rc5t583_irq_mask(struct irq_data * irq_data)157 static void rc5t583_irq_mask(struct irq_data *irq_data)
158 {
159 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
160 unsigned int __irq = irq_data->irq - rc5t583->irq_base;
161 const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
162
163 rc5t583->group_irq_en[data->grp_index] &= ~(1 << data->grp_index);
164 if (!rc5t583->group_irq_en[data->grp_index])
165 rc5t583->intc_inten_reg &= ~(1 << data->master_bit);
166
167 rc5t583->irq_en_reg[data->mask_reg_index] &= ~(1 << data->int_en_bit);
168 }
169
rc5t583_irq_set_type(struct irq_data * irq_data,unsigned int type)170 static int rc5t583_irq_set_type(struct irq_data *irq_data, unsigned int type)
171 {
172 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
173 unsigned int __irq = irq_data->irq - rc5t583->irq_base;
174 const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
175 int val = 0;
176 int gpedge_index;
177 int gpedge_bit_pos;
178
179 /* Supporting only trigger level inetrrupt */
180 if ((data->int_type & GPIO_INT) && (type & IRQ_TYPE_EDGE_BOTH)) {
181 gpedge_index = data->int_en_bit / 4;
182 gpedge_bit_pos = data->int_en_bit % 4;
183
184 if (type & IRQ_TYPE_EDGE_FALLING)
185 val |= 0x2;
186
187 if (type & IRQ_TYPE_EDGE_RISING)
188 val |= 0x1;
189
190 rc5t583->gpedge_reg[gpedge_index] &= ~(3 << gpedge_bit_pos);
191 rc5t583->gpedge_reg[gpedge_index] |= (val << gpedge_bit_pos);
192 rc5t583_irq_unmask(irq_data);
193 return 0;
194 }
195 return -EINVAL;
196 }
197
rc5t583_irq_sync_unlock(struct irq_data * irq_data)198 static void rc5t583_irq_sync_unlock(struct irq_data *irq_data)
199 {
200 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
201 int i;
202 int ret;
203
204 for (i = 0; i < ARRAY_SIZE(rc5t583->gpedge_reg); i++) {
205 ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
206 rc5t583->gpedge_reg[i]);
207 if (ret < 0)
208 dev_warn(rc5t583->dev,
209 "Error in writing reg 0x%02x error: %d\n",
210 gpedge_add[i], ret);
211 }
212
213 for (i = 0; i < ARRAY_SIZE(rc5t583->irq_en_reg); i++) {
214 ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
215 rc5t583->irq_en_reg[i]);
216 if (ret < 0)
217 dev_warn(rc5t583->dev,
218 "Error in writing reg 0x%02x error: %d\n",
219 irq_en_add[i], ret);
220 }
221
222 ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN,
223 rc5t583->intc_inten_reg);
224 if (ret < 0)
225 dev_warn(rc5t583->dev,
226 "Error in writing reg 0x%02x error: %d\n",
227 RC5T583_INTC_INTEN, ret);
228
229 mutex_unlock(&rc5t583->irq_lock);
230 }
231 #ifdef CONFIG_PM_SLEEP
rc5t583_irq_set_wake(struct irq_data * irq_data,unsigned int on)232 static int rc5t583_irq_set_wake(struct irq_data *irq_data, unsigned int on)
233 {
234 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
235 return irq_set_irq_wake(rc5t583->chip_irq, on);
236 }
237 #else
238 #define rc5t583_irq_set_wake NULL
239 #endif
240
rc5t583_irq(int irq,void * data)241 static irqreturn_t rc5t583_irq(int irq, void *data)
242 {
243 struct rc5t583 *rc5t583 = data;
244 uint8_t int_sts[RC5T583_MAX_INTERRUPT_MASK_REGS];
245 uint8_t master_int = 0;
246 int i;
247 int ret;
248 unsigned int rtc_int_sts = 0;
249
250 /* Clear the status */
251 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)
252 int_sts[i] = 0;
253
254 ret = rc5t583_read(rc5t583->dev, RC5T583_INTC_INTMON, &master_int);
255 if (ret < 0) {
256 dev_err(rc5t583->dev,
257 "Error in reading reg 0x%02x error: %d\n",
258 RC5T583_INTC_INTMON, ret);
259 return IRQ_HANDLED;
260 }
261
262 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; ++i) {
263 if (!(master_int & main_int_type[i]))
264 continue;
265
266 ret = rc5t583_read(rc5t583->dev, irq_mon_add[i], &int_sts[i]);
267 if (ret < 0) {
268 dev_warn(rc5t583->dev,
269 "Error in reading reg 0x%02x error: %d\n",
270 irq_mon_add[i], ret);
271 int_sts[i] = 0;
272 continue;
273 }
274
275 if (main_int_type[i] & RTC_INT) {
276 rtc_int_sts = 0;
277 if (int_sts[i] & 0x1)
278 rtc_int_sts |= BIT(6);
279 if (int_sts[i] & 0x2)
280 rtc_int_sts |= BIT(7);
281 if (int_sts[i] & 0x4)
282 rtc_int_sts |= BIT(0);
283 if (int_sts[i] & 0x8)
284 rtc_int_sts |= BIT(5);
285 }
286
287 ret = rc5t583_write(rc5t583->dev, irq_clr_add[i],
288 ~int_sts[i]);
289 if (ret < 0)
290 dev_warn(rc5t583->dev,
291 "Error in reading reg 0x%02x error: %d\n",
292 irq_clr_add[i], ret);
293
294 if (main_int_type[i] & RTC_INT)
295 int_sts[i] = rtc_int_sts;
296 }
297
298 /* Merge gpio interrupts for rising and falling case*/
299 int_sts[7] |= int_sts[8];
300
301 /* Call interrupt handler if enabled */
302 for (i = 0; i < RC5T583_MAX_IRQS; ++i) {
303 const struct rc5t583_irq_data *data = &rc5t583_irqs[i];
304 if ((int_sts[data->mask_reg_index] & (1 << data->int_en_bit)) &&
305 (rc5t583->group_irq_en[data->master_bit] &
306 (1 << data->grp_index)))
307 handle_nested_irq(rc5t583->irq_base + i);
308 }
309
310 return IRQ_HANDLED;
311 }
312
313 static struct irq_chip rc5t583_irq_chip = {
314 .name = "rc5t583-irq",
315 .irq_mask = rc5t583_irq_mask,
316 .irq_unmask = rc5t583_irq_unmask,
317 .irq_bus_lock = rc5t583_irq_lock,
318 .irq_bus_sync_unlock = rc5t583_irq_sync_unlock,
319 .irq_set_type = rc5t583_irq_set_type,
320 .irq_set_wake = rc5t583_irq_set_wake,
321 };
322
rc5t583_irq_init(struct rc5t583 * rc5t583,int irq,int irq_base)323 int rc5t583_irq_init(struct rc5t583 *rc5t583, int irq, int irq_base)
324 {
325 int i, ret;
326
327 if (!irq_base) {
328 dev_warn(rc5t583->dev, "No interrupt support on IRQ base\n");
329 return -EINVAL;
330 }
331
332 mutex_init(&rc5t583->irq_lock);
333
334 /* Initailize all int register to 0 */
335 for (i = 0; i < RC5T583_MAX_INTERRUPT_EN_REGS; i++) {
336 ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
337 rc5t583->irq_en_reg[i]);
338 if (ret < 0)
339 dev_warn(rc5t583->dev,
340 "Error in writing reg 0x%02x error: %d\n",
341 irq_en_add[i], ret);
342 }
343
344 for (i = 0; i < RC5T583_MAX_GPEDGE_REG; i++) {
345 ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
346 rc5t583->gpedge_reg[i]);
347 if (ret < 0)
348 dev_warn(rc5t583->dev,
349 "Error in writing reg 0x%02x error: %d\n",
350 gpedge_add[i], ret);
351 }
352
353 ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN, 0x0);
354 if (ret < 0)
355 dev_warn(rc5t583->dev,
356 "Error in writing reg 0x%02x error: %d\n",
357 RC5T583_INTC_INTEN, ret);
358
359 /* Clear all interrupts in case they woke up active. */
360 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
361 ret = rc5t583_write(rc5t583->dev, irq_clr_add[i], 0);
362 if (ret < 0)
363 dev_warn(rc5t583->dev,
364 "Error in writing reg 0x%02x error: %d\n",
365 irq_clr_add[i], ret);
366 }
367
368 rc5t583->irq_base = irq_base;
369 rc5t583->chip_irq = irq;
370
371 for (i = 0; i < RC5T583_MAX_IRQS; i++) {
372 int __irq = i + rc5t583->irq_base;
373 irq_set_chip_data(__irq, rc5t583);
374 irq_set_chip_and_handler(__irq, &rc5t583_irq_chip,
375 handle_simple_irq);
376 irq_set_nested_thread(__irq, 1);
377 irq_clear_status_flags(__irq, IRQ_NOREQUEST);
378 }
379
380 ret = devm_request_threaded_irq(rc5t583->dev, irq, NULL, rc5t583_irq,
381 IRQF_ONESHOT, "rc5t583", rc5t583);
382 if (ret < 0)
383 dev_err(rc5t583->dev,
384 "Error in registering interrupt error: %d\n", ret);
385 return ret;
386 }
387