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authorLaxman Dewangan <ldewangan@nvidia.com>2012-02-28 08:05:17 -0500
committerSamuel Ortiz <sameo@linux.intel.com>2012-03-16 15:05:45 -0400
commit1b1247dd75aa5cf5fae54a3bec7280046e9c7957 (patch)
treeb2a63af28a30582f7e429f4f6627ad179a831df4 /drivers/mfd/rc5t583-irq.c
parentbc628fd19d2d1d053b88fa225bb599be026c048b (diff)
mfd: Add support for RICOH PMIC RC5T583
Ricoh power management IC RC5T583 contains is multi functional device having multiple sub devices inside this. This device has multiple dcdc/ldo regulators, gpios, interrupt controllers, on-key, RTCs, ADCs. This device have 4 DCDCs, 8 LDOs, 8 GPIOs, 6 ADCs, 3 RTCs etc. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/rc5t583-irq.c')
-rw-r--r--drivers/mfd/rc5t583-irq.c408
1 files changed, 408 insertions, 0 deletions
diff --git a/drivers/mfd/rc5t583-irq.c b/drivers/mfd/rc5t583-irq.c
new file mode 100644
index 000000000000..fa6f80fad5f1
--- /dev/null
+++ b/drivers/mfd/rc5t583-irq.c
@@ -0,0 +1,408 @@
1/*
2 * Interrupt driver for RICOH583 power management chip.
3 *
4 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
5 * Author: Laxman dewangan <ldewangan@nvidia.com>
6 *
7 * based on code
8 * Copyright (C) 2011 RICOH COMPANY,LTD
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms and conditions of the GNU General Public License,
12 * version 2, as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 *
22 */
23#include <linux/interrupt.h>
24#include <linux/irq.h>
25#include <linux/init.h>
26#include <linux/i2c.h>
27#include <linux/mfd/rc5t583.h>
28
29enum int_type {
30 SYS_INT = 0x1,
31 DCDC_INT = 0x2,
32 RTC_INT = 0x4,
33 ADC_INT = 0x8,
34 GPIO_INT = 0x10,
35};
36
37static int gpedge_add[] = {
38 RC5T583_GPIO_GPEDGE2,
39 RC5T583_GPIO_GPEDGE2
40};
41
42static int irq_en_add[] = {
43 RC5T583_INT_EN_SYS1,
44 RC5T583_INT_EN_SYS2,
45 RC5T583_INT_EN_DCDC,
46 RC5T583_INT_EN_RTC,
47 RC5T583_INT_EN_ADC1,
48 RC5T583_INT_EN_ADC2,
49 RC5T583_INT_EN_ADC3,
50 RC5T583_GPIO_EN_INT
51};
52
53static int irq_mon_add[] = {
54 RC5T583_INT_MON_SYS1,
55 RC5T583_INT_MON_SYS2,
56 RC5T583_INT_MON_DCDC,
57 RC5T583_INT_MON_RTC,
58 RC5T583_INT_IR_ADCL,
59 RC5T583_INT_IR_ADCH,
60 RC5T583_INT_IR_ADCEND,
61 RC5T583_INT_IR_GPIOF,
62 RC5T583_INT_IR_GPIOR
63};
64
65static int irq_clr_add[] = {
66 RC5T583_INT_IR_SYS1,
67 RC5T583_INT_IR_SYS2,
68 RC5T583_INT_IR_DCDC,
69 RC5T583_INT_IR_RTC,
70 RC5T583_INT_IR_ADCL,
71 RC5T583_INT_IR_ADCH,
72 RC5T583_INT_IR_ADCEND,
73 RC5T583_INT_IR_GPIOF,
74 RC5T583_INT_IR_GPIOR
75};
76
77static int main_int_type[] = {
78 SYS_INT,
79 SYS_INT,
80 DCDC_INT,
81 RTC_INT,
82 ADC_INT,
83 ADC_INT,
84 ADC_INT,
85 GPIO_INT,
86 GPIO_INT,
87};
88
89struct rc5t583_irq_data {
90 u8 int_type;
91 u8 master_bit;
92 u8 int_en_bit;
93 u8 mask_reg_index;
94 int grp_index;
95};
96
97#define RC5T583_IRQ(_int_type, _master_bit, _grp_index, \
98 _int_bit, _mask_ind) \
99 { \
100 .int_type = _int_type, \
101 .master_bit = _master_bit, \
102 .grp_index = _grp_index, \
103 .int_en_bit = _int_bit, \
104 .mask_reg_index = _mask_ind, \
105 }
106
107static const struct rc5t583_irq_data rc5t583_irqs[RC5T583_MAX_IRQS] = {
108 [RC5T583_IRQ_ONKEY] = RC5T583_IRQ(SYS_INT, 0, 0, 0, 0),
109 [RC5T583_IRQ_ACOK] = RC5T583_IRQ(SYS_INT, 0, 1, 1, 0),
110 [RC5T583_IRQ_LIDOPEN] = RC5T583_IRQ(SYS_INT, 0, 2, 2, 0),
111 [RC5T583_IRQ_PREOT] = RC5T583_IRQ(SYS_INT, 0, 3, 3, 0),
112 [RC5T583_IRQ_CLKSTP] = RC5T583_IRQ(SYS_INT, 0, 4, 4, 0),
113 [RC5T583_IRQ_ONKEY_OFF] = RC5T583_IRQ(SYS_INT, 0, 5, 5, 0),
114 [RC5T583_IRQ_WD] = RC5T583_IRQ(SYS_INT, 0, 7, 7, 0),
115 [RC5T583_IRQ_EN_PWRREQ1] = RC5T583_IRQ(SYS_INT, 0, 8, 0, 1),
116 [RC5T583_IRQ_EN_PWRREQ2] = RC5T583_IRQ(SYS_INT, 0, 9, 1, 1),
117 [RC5T583_IRQ_PRE_VINDET] = RC5T583_IRQ(SYS_INT, 0, 10, 2, 1),
118
119 [RC5T583_IRQ_DC0LIM] = RC5T583_IRQ(DCDC_INT, 1, 0, 0, 2),
120 [RC5T583_IRQ_DC1LIM] = RC5T583_IRQ(DCDC_INT, 1, 1, 1, 2),
121 [RC5T583_IRQ_DC2LIM] = RC5T583_IRQ(DCDC_INT, 1, 2, 2, 2),
122 [RC5T583_IRQ_DC3LIM] = RC5T583_IRQ(DCDC_INT, 1, 3, 3, 2),
123
124 [RC5T583_IRQ_CTC] = RC5T583_IRQ(RTC_INT, 2, 0, 0, 3),
125 [RC5T583_IRQ_YALE] = RC5T583_IRQ(RTC_INT, 2, 5, 5, 3),
126 [RC5T583_IRQ_DALE] = RC5T583_IRQ(RTC_INT, 2, 6, 6, 3),
127 [RC5T583_IRQ_WALE] = RC5T583_IRQ(RTC_INT, 2, 7, 7, 3),
128
129 [RC5T583_IRQ_AIN1L] = RC5T583_IRQ(ADC_INT, 3, 0, 0, 4),
130 [RC5T583_IRQ_AIN2L] = RC5T583_IRQ(ADC_INT, 3, 1, 1, 4),
131 [RC5T583_IRQ_AIN3L] = RC5T583_IRQ(ADC_INT, 3, 2, 2, 4),
132 [RC5T583_IRQ_VBATL] = RC5T583_IRQ(ADC_INT, 3, 3, 3, 4),
133 [RC5T583_IRQ_VIN3L] = RC5T583_IRQ(ADC_INT, 3, 4, 4, 4),
134 [RC5T583_IRQ_VIN8L] = RC5T583_IRQ(ADC_INT, 3, 5, 5, 4),
135 [RC5T583_IRQ_AIN1H] = RC5T583_IRQ(ADC_INT, 3, 6, 0, 5),
136 [RC5T583_IRQ_AIN2H] = RC5T583_IRQ(ADC_INT, 3, 7, 1, 5),
137 [RC5T583_IRQ_AIN3H] = RC5T583_IRQ(ADC_INT, 3, 8, 2, 5),
138 [RC5T583_IRQ_VBATH] = RC5T583_IRQ(ADC_INT, 3, 9, 3, 5),
139 [RC5T583_IRQ_VIN3H] = RC5T583_IRQ(ADC_INT, 3, 10, 4, 5),
140 [RC5T583_IRQ_VIN8H] = RC5T583_IRQ(ADC_INT, 3, 11, 5, 5),
141 [RC5T583_IRQ_ADCEND] = RC5T583_IRQ(ADC_INT, 3, 12, 0, 6),
142
143 [RC5T583_IRQ_GPIO0] = RC5T583_IRQ(GPIO_INT, 4, 0, 0, 7),
144 [RC5T583_IRQ_GPIO1] = RC5T583_IRQ(GPIO_INT, 4, 1, 1, 7),
145 [RC5T583_IRQ_GPIO2] = RC5T583_IRQ(GPIO_INT, 4, 2, 2, 7),
146 [RC5T583_IRQ_GPIO3] = RC5T583_IRQ(GPIO_INT, 4, 3, 3, 7),
147 [RC5T583_IRQ_GPIO4] = RC5T583_IRQ(GPIO_INT, 4, 4, 4, 7),
148 [RC5T583_IRQ_GPIO5] = RC5T583_IRQ(GPIO_INT, 4, 5, 5, 7),
149 [RC5T583_IRQ_GPIO6] = RC5T583_IRQ(GPIO_INT, 4, 6, 6, 7),
150 [RC5T583_IRQ_GPIO7] = RC5T583_IRQ(GPIO_INT, 4, 7, 7, 7),
151};
152
153static void rc5t583_irq_lock(struct irq_data *irq_data)
154{
155 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
156 mutex_lock(&rc5t583->irq_lock);
157}
158
159static void rc5t583_irq_unmask(struct irq_data *irq_data)
160{
161 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
162 unsigned int __irq = irq_data->irq - rc5t583->irq_base;
163 const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
164
165 rc5t583->group_irq_en[data->grp_index] |= 1 << data->grp_index;
166 rc5t583->intc_inten_reg |= 1 << data->master_bit;
167 rc5t583->irq_en_reg[data->mask_reg_index] |= 1 << data->int_en_bit;
168}
169
170static void rc5t583_irq_mask(struct irq_data *irq_data)
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
176 rc5t583->group_irq_en[data->grp_index] &= ~(1 << data->grp_index);
177 if (!rc5t583->group_irq_en[data->grp_index])
178 rc5t583->intc_inten_reg &= ~(1 << data->master_bit);
179
180 rc5t583->irq_en_reg[data->mask_reg_index] &= ~(1 << data->int_en_bit);
181}
182
183static int rc5t583_irq_set_type(struct irq_data *irq_data, unsigned int type)
184{
185 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
186 unsigned int __irq = irq_data->irq - rc5t583->irq_base;
187 const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
188 int val = 0;
189 int gpedge_index;
190 int gpedge_bit_pos;
191
192 /* Supporting only trigger level inetrrupt */
193 if ((data->int_type & GPIO_INT) && (type & IRQ_TYPE_EDGE_BOTH)) {
194 gpedge_index = data->int_en_bit / 4;
195 gpedge_bit_pos = data->int_en_bit % 4;
196
197 if (type & IRQ_TYPE_EDGE_FALLING)
198 val |= 0x2;
199
200 if (type & IRQ_TYPE_EDGE_RISING)
201 val |= 0x1;
202
203 rc5t583->gpedge_reg[gpedge_index] &= ~(3 << gpedge_bit_pos);
204 rc5t583->gpedge_reg[gpedge_index] |= (val << gpedge_bit_pos);
205 rc5t583_irq_unmask(irq_data);
206 return 0;
207 }
208 return -EINVAL;
209}
210
211static void rc5t583_irq_sync_unlock(struct irq_data *irq_data)
212{
213 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
214 int i;
215 int ret;
216
217 for (i = 0; i < ARRAY_SIZE(rc5t583->gpedge_reg); i++) {
218 ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
219 rc5t583->gpedge_reg[i]);
220 if (ret < 0)
221 dev_warn(rc5t583->dev,
222 "Error in writing reg 0x%02x error: %d\n",
223 gpedge_add[i], ret);
224 }
225
226 for (i = 0; i < ARRAY_SIZE(rc5t583->irq_en_reg); i++) {
227 ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
228 rc5t583->irq_en_reg[i]);
229 if (ret < 0)
230 dev_warn(rc5t583->dev,
231 "Error in writing reg 0x%02x error: %d\n",
232 irq_en_add[i], ret);
233 }
234
235 ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN,
236 rc5t583->intc_inten_reg);
237 if (ret < 0)
238 dev_warn(rc5t583->dev,
239 "Error in writing reg 0x%02x error: %d\n",
240 RC5T583_INTC_INTEN, ret);
241
242 mutex_unlock(&rc5t583->irq_lock);
243}
244#ifdef CONFIG_PM_SLEEP
245static int rc5t583_irq_set_wake(struct irq_data *irq_data, unsigned int on)
246{
247 struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
248 return irq_set_irq_wake(rc5t583->chip_irq, on);
249}
250#else
251#define rc5t583_irq_set_wake NULL
252#endif
253
254static irqreturn_t rc5t583_irq(int irq, void *data)
255{
256 struct rc5t583 *rc5t583 = data;
257 uint8_t int_sts[RC5T583_MAX_INTERRUPT_MASK_REGS];
258 uint8_t master_int;
259 int i;
260 int ret;
261 unsigned int rtc_int_sts = 0;
262
263 /* Clear the status */
264 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)
265 int_sts[i] = 0;
266
267 ret = rc5t583_read(rc5t583->dev, RC5T583_INTC_INTMON, &master_int);
268 if (ret < 0) {
269 dev_err(rc5t583->dev,
270 "Error in reading reg 0x%02x error: %d\n",
271 RC5T583_INTC_INTMON, ret);
272 return IRQ_HANDLED;
273 }
274
275 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; ++i) {
276 if (!(master_int & main_int_type[i]))
277 continue;
278
279 ret = rc5t583_read(rc5t583->dev, irq_mon_add[i], &int_sts[i]);
280 if (ret < 0) {
281 dev_warn(rc5t583->dev,
282 "Error in reading reg 0x%02x error: %d\n",
283 irq_mon_add[i], ret);
284 int_sts[i] = 0;
285 continue;
286 }
287
288 if (main_int_type[i] & RTC_INT) {
289 rtc_int_sts = 0;
290 if (int_sts[i] & 0x1)
291 rtc_int_sts |= BIT(6);
292 if (int_sts[i] & 0x2)
293 rtc_int_sts |= BIT(7);
294 if (int_sts[i] & 0x4)
295 rtc_int_sts |= BIT(0);
296 if (int_sts[i] & 0x8)
297 rtc_int_sts |= BIT(5);
298 }
299
300 ret = rc5t583_write(rc5t583->dev, irq_clr_add[i],
301 ~int_sts[i]);
302 if (ret < 0)
303 dev_warn(rc5t583->dev,
304 "Error in reading reg 0x%02x error: %d\n",
305 irq_clr_add[i], ret);
306
307 if (main_int_type[i] & RTC_INT)
308 int_sts[i] = rtc_int_sts;
309 }
310
311 /* Merge gpio interrupts for rising and falling case*/
312 int_sts[7] |= int_sts[8];
313
314 /* Call interrupt handler if enabled */
315 for (i = 0; i < RC5T583_MAX_IRQS; ++i) {
316 const struct rc5t583_irq_data *data = &rc5t583_irqs[i];
317 if ((int_sts[data->mask_reg_index] & (1 << data->int_en_bit)) &&
318 (rc5t583->group_irq_en[data->master_bit] &
319 (1 << data->grp_index)))
320 handle_nested_irq(rc5t583->irq_base + i);
321 }
322
323 return IRQ_HANDLED;
324}
325
326static struct irq_chip rc5t583_irq_chip = {
327 .name = "rc5t583-irq",
328 .irq_mask = rc5t583_irq_mask,
329 .irq_unmask = rc5t583_irq_unmask,
330 .irq_bus_lock = rc5t583_irq_lock,
331 .irq_bus_sync_unlock = rc5t583_irq_sync_unlock,
332 .irq_set_type = rc5t583_irq_set_type,
333 .irq_set_wake = rc5t583_irq_set_wake,
334};
335
336int rc5t583_irq_init(struct rc5t583 *rc5t583, int irq, int irq_base)
337{
338 int i, ret;
339
340 if (!irq_base) {
341 dev_warn(rc5t583->dev, "No interrupt support on IRQ base\n");
342 return -EINVAL;
343 }
344
345 mutex_init(&rc5t583->irq_lock);
346
347 /* Initailize all int register to 0 */
348 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
349 ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
350 rc5t583->irq_en_reg[i]);
351 if (ret < 0)
352 dev_warn(rc5t583->dev,
353 "Error in writing reg 0x%02x error: %d\n",
354 irq_en_add[i], ret);
355 }
356
357 for (i = 0; i < RC5T583_MAX_GPEDGE_REG; i++) {
358 ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
359 rc5t583->gpedge_reg[i]);
360 if (ret < 0)
361 dev_warn(rc5t583->dev,
362 "Error in writing reg 0x%02x error: %d\n",
363 gpedge_add[i], ret);
364 }
365
366 ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN, 0x0);
367 if (ret < 0)
368 dev_warn(rc5t583->dev,
369 "Error in writing reg 0x%02x error: %d\n",
370 RC5T583_INTC_INTEN, ret);
371
372 /* Clear all interrupts in case they woke up active. */
373 for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
374 ret = rc5t583_write(rc5t583->dev, irq_clr_add[i], 0);
375 if (ret < 0)
376 dev_warn(rc5t583->dev,
377 "Error in writing reg 0x%02x error: %d\n",
378 irq_clr_add[i], ret);
379 }
380
381 rc5t583->irq_base = irq_base;
382 rc5t583->chip_irq = irq;
383
384 for (i = 0; i < RC5T583_MAX_IRQS; i++) {
385 int __irq = i + rc5t583->irq_base;
386 irq_set_chip_data(__irq, rc5t583);
387 irq_set_chip_and_handler(__irq, &rc5t583_irq_chip,
388 handle_simple_irq);
389 irq_set_nested_thread(__irq, 1);
390#ifdef CONFIG_ARM
391 set_irq_flags(__irq, IRQF_VALID);
392#endif
393 }
394
395 ret = request_threaded_irq(irq, NULL, rc5t583_irq, IRQF_ONESHOT,
396 "rc5t583", rc5t583);
397 if (ret < 0)
398 dev_err(rc5t583->dev,
399 "Error in registering interrupt error: %d\n", ret);
400 return ret;
401}
402
403int rc5t583_irq_exit(struct rc5t583 *rc5t583)
404{
405 if (rc5t583->chip_irq)
406 free_irq(rc5t583->chip_irq, rc5t583);
407 return 0;
408}
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