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Balaji T Ke8deb282009-12-14 00:25:31 +01001/*
2 * twl6030-irq.c - TWL6030 irq support
3 *
4 * Copyright (C) 2005-2009 Texas Instruments, Inc.
5 *
6 * Modifications to defer interrupt handling to a kernel thread:
7 * Copyright (C) 2006 MontaVista Software, Inc.
8 *
9 * Based on tlv320aic23.c:
10 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
11 *
12 * Code cleanup and modifications to IRQ handler.
13 * by syed khasim <x0khasim@ti.com>
14 *
15 * TWL6030 specific code and IRQ handling changes by
16 * Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
17 * Balaji T K <balajitk@ti.com>
18 *
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 */
33
Paul Gortmaker5d4a3572011-07-10 12:41:10 -040034#include <linux/export.h>
Balaji T Ke8deb282009-12-14 00:25:31 +010035#include <linux/interrupt.h>
36#include <linux/irq.h>
37#include <linux/kthread.h>
38#include <linux/i2c/twl.h>
kishore kadiyala72f2e2c2010-09-24 17:13:20 +000039#include <linux/platform_device.h>
Todd Poynorab2b9262011-10-04 11:52:29 +020040#include <linux/suspend.h>
Benoit Cousson78518ff2012-02-29 19:40:31 +010041#include <linux/of.h>
42#include <linux/irqdomain.h>
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +030043#include <linux/of_device.h>
Balaji T Ke8deb282009-12-14 00:25:31 +010044
G, Manjunath Kondaiahb0b4a7c2010-10-19 11:02:48 +020045#include "twl-core.h"
46
Balaji T Ke8deb282009-12-14 00:25:31 +010047/*
48 * TWL6030 (unlike its predecessors, which had two level interrupt handling)
49 * three interrupt registers INT_STS_A, INT_STS_B and INT_STS_C.
50 * It exposes status bits saying who has raised an interrupt. There are
51 * three mask registers that corresponds to these status registers, that
52 * enables/disables these interrupts.
53 *
54 * We set up IRQs starting at a platform-specified base. An interrupt map table,
55 * specifies mapping between interrupt number and the associated module.
Balaji T Ke8deb282009-12-14 00:25:31 +010056 */
Benoit Cousson78518ff2012-02-29 19:40:31 +010057#define TWL6030_NR_IRQS 20
Balaji T Ke8deb282009-12-14 00:25:31 +010058
59static int twl6030_interrupt_mapping[24] = {
60 PWR_INTR_OFFSET, /* Bit 0 PWRON */
61 PWR_INTR_OFFSET, /* Bit 1 RPWRON */
62 PWR_INTR_OFFSET, /* Bit 2 BAT_VLOW */
63 RTC_INTR_OFFSET, /* Bit 3 RTC_ALARM */
64 RTC_INTR_OFFSET, /* Bit 4 RTC_PERIOD */
65 HOTDIE_INTR_OFFSET, /* Bit 5 HOT_DIE */
66 SMPSLDO_INTR_OFFSET, /* Bit 6 VXXX_SHORT */
67 SMPSLDO_INTR_OFFSET, /* Bit 7 VMMC_SHORT */
68
69 SMPSLDO_INTR_OFFSET, /* Bit 8 VUSIM_SHORT */
70 BATDETECT_INTR_OFFSET, /* Bit 9 BAT */
71 SIMDETECT_INTR_OFFSET, /* Bit 10 SIM */
72 MMCDETECT_INTR_OFFSET, /* Bit 11 MMC */
73 RSV_INTR_OFFSET, /* Bit 12 Reserved */
74 MADC_INTR_OFFSET, /* Bit 13 GPADC_RT_EOC */
75 MADC_INTR_OFFSET, /* Bit 14 GPADC_SW_EOC */
76 GASGAUGE_INTR_OFFSET, /* Bit 15 CC_AUTOCAL */
77
78 USBOTG_INTR_OFFSET, /* Bit 16 ID_WKUP */
79 USBOTG_INTR_OFFSET, /* Bit 17 VBUS_WKUP */
80 USBOTG_INTR_OFFSET, /* Bit 18 ID */
Hema HK77b1d3f2010-12-10 17:55:37 +053081 USB_PRES_INTR_OFFSET, /* Bit 19 VBUS */
Balaji T Ke8deb282009-12-14 00:25:31 +010082 CHARGER_INTR_OFFSET, /* Bit 20 CHRG_CTRL */
Graeme Gregory6523b142011-05-12 14:27:56 +010083 CHARGERFAULT_INTR_OFFSET, /* Bit 21 EXT_CHRG */
84 CHARGERFAULT_INTR_OFFSET, /* Bit 22 INT_CHRG */
Balaji T Ke8deb282009-12-14 00:25:31 +010085 RSV_INTR_OFFSET, /* Bit 23 Reserved */
86};
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +030087
88static int twl6032_interrupt_mapping[24] = {
89 PWR_INTR_OFFSET, /* Bit 0 PWRON */
90 PWR_INTR_OFFSET, /* Bit 1 RPWRON */
91 PWR_INTR_OFFSET, /* Bit 2 SYS_VLOW */
92 RTC_INTR_OFFSET, /* Bit 3 RTC_ALARM */
93 RTC_INTR_OFFSET, /* Bit 4 RTC_PERIOD */
94 HOTDIE_INTR_OFFSET, /* Bit 5 HOT_DIE */
95 SMPSLDO_INTR_OFFSET, /* Bit 6 VXXX_SHORT */
96 PWR_INTR_OFFSET, /* Bit 7 SPDURATION */
97
98 PWR_INTR_OFFSET, /* Bit 8 WATCHDOG */
99 BATDETECT_INTR_OFFSET, /* Bit 9 BAT */
100 SIMDETECT_INTR_OFFSET, /* Bit 10 SIM */
101 MMCDETECT_INTR_OFFSET, /* Bit 11 MMC */
102 MADC_INTR_OFFSET, /* Bit 12 GPADC_RT_EOC */
103 MADC_INTR_OFFSET, /* Bit 13 GPADC_SW_EOC */
104 GASGAUGE_INTR_OFFSET, /* Bit 14 CC_EOC */
105 GASGAUGE_INTR_OFFSET, /* Bit 15 CC_AUTOCAL */
106
107 USBOTG_INTR_OFFSET, /* Bit 16 ID_WKUP */
108 USBOTG_INTR_OFFSET, /* Bit 17 VBUS_WKUP */
109 USBOTG_INTR_OFFSET, /* Bit 18 ID */
110 USB_PRES_INTR_OFFSET, /* Bit 19 VBUS */
111 CHARGER_INTR_OFFSET, /* Bit 20 CHRG_CTRL */
112 CHARGERFAULT_INTR_OFFSET, /* Bit 21 EXT_CHRG */
113 CHARGERFAULT_INTR_OFFSET, /* Bit 22 INT_CHRG */
114 RSV_INTR_OFFSET, /* Bit 23 Reserved */
115};
116
Balaji T Ke8deb282009-12-14 00:25:31 +0100117/*----------------------------------------------------------------------*/
118
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300119struct twl6030_irq {
120 unsigned int irq_base;
121 int twl_irq;
122 bool irq_wake_enabled;
123 atomic_t wakeirqs;
124 struct notifier_block pm_nb;
125 struct irq_chip irq_chip;
126 struct irq_domain *irq_domain;
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +0300127 const int *irq_mapping_tbl;
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300128};
Balaji T Ke8deb282009-12-14 00:25:31 +0100129
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300130static struct twl6030_irq *twl6030_irq;
Todd Poynorab2b9262011-10-04 11:52:29 +0200131
132static int twl6030_irq_pm_notifier(struct notifier_block *notifier,
133 unsigned long pm_event, void *unused)
134{
135 int chained_wakeups;
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300136 struct twl6030_irq *pdata = container_of(notifier, struct twl6030_irq,
137 pm_nb);
Todd Poynorab2b9262011-10-04 11:52:29 +0200138
139 switch (pm_event) {
140 case PM_SUSPEND_PREPARE:
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300141 chained_wakeups = atomic_read(&pdata->wakeirqs);
Todd Poynorab2b9262011-10-04 11:52:29 +0200142
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300143 if (chained_wakeups && !pdata->irq_wake_enabled) {
144 if (enable_irq_wake(pdata->twl_irq))
Todd Poynorab2b9262011-10-04 11:52:29 +0200145 pr_err("twl6030 IRQ wake enable failed\n");
146 else
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300147 pdata->irq_wake_enabled = true;
148 } else if (!chained_wakeups && pdata->irq_wake_enabled) {
149 disable_irq_wake(pdata->twl_irq);
150 pdata->irq_wake_enabled = false;
Todd Poynorab2b9262011-10-04 11:52:29 +0200151 }
152
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300153 disable_irq(pdata->twl_irq);
Todd Poynorab2b9262011-10-04 11:52:29 +0200154 break;
Todd Poynor782baa22011-09-26 16:44:24 -0700155
156 case PM_POST_SUSPEND:
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300157 enable_irq(pdata->twl_irq);
Todd Poynor782baa22011-09-26 16:44:24 -0700158 break;
159
Todd Poynorab2b9262011-10-04 11:52:29 +0200160 default:
161 break;
162 }
163
164 return NOTIFY_DONE;
165}
166
Balaji T Ke8deb282009-12-14 00:25:31 +0100167/*
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300168* Threaded irq handler for the twl6030 interrupt.
169* We query the interrupt controller in the twl6030 to determine
170* which module is generating the interrupt request and call
171* handle_nested_irq for that module.
172*/
173static irqreturn_t twl6030_irq_thread(int irq, void *data)
Balaji T Ke8deb282009-12-14 00:25:31 +0100174{
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300175 int i, ret;
176 union {
Balaji T Ke8deb282009-12-14 00:25:31 +0100177 u8 bytes[4];
Danke Xie754fa7b2013-12-23 19:11:46 +0200178 __le32 int_sts;
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300179 } sts;
Danke Xie754fa7b2013-12-23 19:11:46 +0200180 u32 int_sts; /* sts.int_sts converted to CPU endianness */
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300181 struct twl6030_irq *pdata = data;
Balaji T Ke8deb282009-12-14 00:25:31 +0100182
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300183 /* read INT_STS_A, B and C in one shot using a burst read */
184 ret = twl_i2c_read(TWL_MODULE_PIH, sts.bytes, REG_INT_STS_A, 3);
185 if (ret) {
186 pr_warn("twl6030_irq: I2C error %d reading PIH ISR\n", ret);
187 return IRQ_HANDLED;
Balaji T Ke8deb282009-12-14 00:25:31 +0100188 }
189
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300190 sts.bytes[3] = 0; /* Only 24 bits are valid*/
Balaji T Ke8deb282009-12-14 00:25:31 +0100191
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300192 /*
193 * Since VBUS status bit is not reliable for VBUS disconnect
194 * use CHARGER VBUS detection status bit instead.
195 */
196 if (sts.bytes[2] & 0x10)
197 sts.bytes[2] |= 0x08;
198
Danke Xie754fa7b2013-12-23 19:11:46 +0200199 int_sts = le32_to_cpu(sts.int_sts);
200 for (i = 0; int_sts; int_sts >>= 1, i++)
201 if (int_sts & 0x1) {
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300202 int module_irq =
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300203 irq_find_mapping(pdata->irq_domain,
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +0300204 pdata->irq_mapping_tbl[i]);
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300205 if (module_irq)
206 handle_nested_irq(module_irq);
207 else
208 pr_err("twl6030_irq: Unmapped PIH ISR %u detected\n",
209 i);
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300210 pr_debug("twl6030_irq: PIH ISR %u, virq%u\n",
211 i, module_irq);
212 }
213
214 /*
215 * NOTE:
216 * Simulation confirms that documentation is wrong w.r.t the
217 * interrupt status clear operation. A single *byte* write to
218 * any one of STS_A to STS_C register results in all three
219 * STS registers being reset. Since it does not matter which
220 * value is written, all three registers are cleared on a
221 * single byte write, so we just use 0x0 to clear.
222 */
223 ret = twl_i2c_write_u8(TWL_MODULE_PIH, 0x00, REG_INT_STS_A);
224 if (ret)
225 pr_warn("twl6030_irq: I2C error in clearing PIH ISR\n");
226
Balaji T Ke8deb282009-12-14 00:25:31 +0100227 return IRQ_HANDLED;
228}
229
230/*----------------------------------------------------------------------*/
231
Nishanth Menonb8b8d792012-02-22 20:03:59 -0600232static int twl6030_irq_set_wake(struct irq_data *d, unsigned int on)
Santosh Shilimkar49dcd072011-09-06 21:29:30 +0530233{
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300234 struct twl6030_irq *pdata = irq_get_chip_data(d->irq);
235
Todd Poynorab2b9262011-10-04 11:52:29 +0200236 if (on)
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300237 atomic_inc(&pdata->wakeirqs);
Todd Poynorab2b9262011-10-04 11:52:29 +0200238 else
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300239 atomic_dec(&pdata->wakeirqs);
Santosh Shilimkar49dcd072011-09-06 21:29:30 +0530240
Todd Poynorab2b9262011-10-04 11:52:29 +0200241 return 0;
Santosh Shilimkar49dcd072011-09-06 21:29:30 +0530242}
243
Balaji T Ke8deb282009-12-14 00:25:31 +0100244int twl6030_interrupt_unmask(u8 bit_mask, u8 offset)
245{
246 int ret;
247 u8 unmask_value;
248 ret = twl_i2c_read_u8(TWL_MODULE_PIH, &unmask_value,
249 REG_INT_STS_A + offset);
250 unmask_value &= (~(bit_mask));
251 ret |= twl_i2c_write_u8(TWL_MODULE_PIH, unmask_value,
252 REG_INT_STS_A + offset); /* unmask INT_MSK_A/B/C */
253 return ret;
254}
255EXPORT_SYMBOL(twl6030_interrupt_unmask);
256
257int twl6030_interrupt_mask(u8 bit_mask, u8 offset)
258{
259 int ret;
260 u8 mask_value;
261 ret = twl_i2c_read_u8(TWL_MODULE_PIH, &mask_value,
262 REG_INT_STS_A + offset);
263 mask_value |= (bit_mask);
264 ret |= twl_i2c_write_u8(TWL_MODULE_PIH, mask_value,
265 REG_INT_STS_A + offset); /* mask INT_MSK_A/B/C */
266 return ret;
267}
268EXPORT_SYMBOL(twl6030_interrupt_mask);
269
kishore kadiyala72f2e2c2010-09-24 17:13:20 +0000270int twl6030_mmc_card_detect_config(void)
271{
272 int ret;
273 u8 reg_val = 0;
274
275 /* Unmasking the Card detect Interrupt line for MMC1 from Phoenix */
276 twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
277 REG_INT_MSK_LINE_B);
278 twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
279 REG_INT_MSK_STS_B);
280 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300281 * Initially Configuring MMC_CTRL for receiving interrupts &
kishore kadiyala72f2e2c2010-09-24 17:13:20 +0000282 * Card status on TWL6030 for MMC1
283 */
284 ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val, TWL6030_MMCCTRL);
285 if (ret < 0) {
286 pr_err("twl6030: Failed to read MMCCTRL, error %d\n", ret);
287 return ret;
288 }
289 reg_val &= ~VMMC_AUTO_OFF;
290 reg_val |= SW_FC;
291 ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val, TWL6030_MMCCTRL);
292 if (ret < 0) {
293 pr_err("twl6030: Failed to write MMCCTRL, error %d\n", ret);
294 return ret;
295 }
296
297 /* Configuring PullUp-PullDown register */
298 ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val,
299 TWL6030_CFG_INPUT_PUPD3);
300 if (ret < 0) {
301 pr_err("twl6030: Failed to read CFG_INPUT_PUPD3, error %d\n",
302 ret);
303 return ret;
304 }
305 reg_val &= ~(MMC_PU | MMC_PD);
306 ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val,
307 TWL6030_CFG_INPUT_PUPD3);
308 if (ret < 0) {
309 pr_err("twl6030: Failed to write CFG_INPUT_PUPD3, error %d\n",
310 ret);
311 return ret;
312 }
Benoit Coussonbdd61bc2012-03-02 16:15:22 +0100313
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300314 return irq_find_mapping(twl6030_irq->irq_domain,
315 MMCDETECT_INTR_OFFSET);
kishore kadiyala72f2e2c2010-09-24 17:13:20 +0000316}
317EXPORT_SYMBOL(twl6030_mmc_card_detect_config);
318
319int twl6030_mmc_card_detect(struct device *dev, int slot)
320{
321 int ret = -EIO;
322 u8 read_reg = 0;
323 struct platform_device *pdev = to_platform_device(dev);
324
325 if (pdev->id) {
326 /* TWL6030 provide's Card detect support for
327 * only MMC1 controller.
328 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300329 pr_err("Unknown MMC controller %d in %s\n", pdev->id, __func__);
kishore kadiyala72f2e2c2010-09-24 17:13:20 +0000330 return ret;
331 }
332 /*
333 * BIT0 of MMC_CTRL on TWL6030 provides card status for MMC1
334 * 0 - Card not present ,1 - Card present
335 */
336 ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &read_reg,
337 TWL6030_MMCCTRL);
338 if (ret >= 0)
339 ret = read_reg & STS_MMC;
340 return ret;
341}
342EXPORT_SYMBOL(twl6030_mmc_card_detect);
343
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300344static int twl6030_irq_map(struct irq_domain *d, unsigned int virq,
345 irq_hw_number_t hwirq)
346{
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300347 struct twl6030_irq *pdata = d->host_data;
348
349 irq_set_chip_data(virq, pdata);
350 irq_set_chip_and_handler(virq, &pdata->irq_chip, handle_simple_irq);
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300351 irq_set_nested_thread(virq, true);
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300352 irq_set_parent(virq, pdata->twl_irq);
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300353
354#ifdef CONFIG_ARM
355 /*
356 * ARM requires an extra step to clear IRQ_NOREQUEST, which it
357 * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
358 */
359 set_irq_flags(virq, IRQF_VALID);
360#else
361 /* same effect on other architectures */
362 irq_set_noprobe(virq);
363#endif
364
365 return 0;
366}
367
368static void twl6030_irq_unmap(struct irq_domain *d, unsigned int virq)
369{
370#ifdef CONFIG_ARM
371 set_irq_flags(virq, 0);
372#endif
373 irq_set_chip_and_handler(virq, NULL, NULL);
374 irq_set_chip_data(virq, NULL);
375}
376
377static struct irq_domain_ops twl6030_irq_domain_ops = {
378 .map = twl6030_irq_map,
379 .unmap = twl6030_irq_unmap,
380 .xlate = irq_domain_xlate_onetwocell,
381};
382
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +0300383static const struct of_device_id twl6030_of_match[] = {
384 {.compatible = "ti,twl6030", &twl6030_interrupt_mapping},
385 {.compatible = "ti,twl6032", &twl6032_interrupt_mapping},
386 { },
387};
388
Benoit Cousson78518ff2012-02-29 19:40:31 +0100389int twl6030_init_irq(struct device *dev, int irq_num)
Balaji T Ke8deb282009-12-14 00:25:31 +0100390{
Benoit Cousson78518ff2012-02-29 19:40:31 +0100391 struct device_node *node = dev->of_node;
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300392 int nr_irqs;
Grygorii Strashkoa820e562013-07-25 16:15:48 +0300393 int status;
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100394 u8 mask[3];
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +0300395 const struct of_device_id *of_id;
396
397 of_id = of_match_device(twl6030_of_match, dev);
398 if (!of_id || !of_id->data) {
399 dev_err(dev, "Unknown TWL device model\n");
400 return -EINVAL;
401 }
Benoit Cousson78518ff2012-02-29 19:40:31 +0100402
403 nr_irqs = TWL6030_NR_IRQS;
404
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300405 twl6030_irq = devm_kzalloc(dev, sizeof(*twl6030_irq), GFP_KERNEL);
406 if (!twl6030_irq) {
407 dev_err(dev, "twl6030_irq: Memory allocation failed\n");
408 return -ENOMEM;
409 }
410
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100411 mask[0] = 0xFF;
Balaji T Ke8deb282009-12-14 00:25:31 +0100412 mask[1] = 0xFF;
413 mask[2] = 0xFF;
Benoit Coussonec1a07b2012-03-02 11:11:26 +0100414
415 /* mask all int lines */
Grygorii Strashkoa820e562013-07-25 16:15:48 +0300416 status = twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_MSK_LINE_A, 3);
Benoit Coussonec1a07b2012-03-02 11:11:26 +0100417 /* mask all int sts */
Grygorii Strashkoa820e562013-07-25 16:15:48 +0300418 status |= twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_MSK_STS_A, 3);
Benoit Coussonec1a07b2012-03-02 11:11:26 +0100419 /* clear INT_STS_A,B,C */
Grygorii Strashkoa820e562013-07-25 16:15:48 +0300420 status |= twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_STS_A, 3);
421
422 if (status < 0) {
423 dev_err(dev, "I2C err writing TWL_MODULE_PIH: %d\n", status);
424 return status;
425 }
Balaji T Ke8deb282009-12-14 00:25:31 +0100426
Benoit Coussonec1a07b2012-03-02 11:11:26 +0100427 /*
428 * install an irq handler for each of the modules;
Balaji T Ke8deb282009-12-14 00:25:31 +0100429 * clone dummy irq_chip since PIH can't *do* anything
430 */
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300431 twl6030_irq->irq_chip = dummy_irq_chip;
432 twl6030_irq->irq_chip.name = "twl6030";
433 twl6030_irq->irq_chip.irq_set_type = NULL;
434 twl6030_irq->irq_chip.irq_set_wake = twl6030_irq_set_wake;
Balaji T Ke8deb282009-12-14 00:25:31 +0100435
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300436 twl6030_irq->pm_nb.notifier_call = twl6030_irq_pm_notifier;
437 atomic_set(&twl6030_irq->wakeirqs, 0);
Oleksandr Dmytryshyn74d85e42013-07-25 16:15:51 +0300438 twl6030_irq->irq_mapping_tbl = of_id->data;
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300439
440 twl6030_irq->irq_domain =
441 irq_domain_add_linear(node, nr_irqs,
442 &twl6030_irq_domain_ops, twl6030_irq);
443 if (!twl6030_irq->irq_domain) {
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300444 dev_err(dev, "Can't add irq_domain\n");
445 return -ENOMEM;
Balaji T Ke8deb282009-12-14 00:25:31 +0100446 }
447
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300448 dev_info(dev, "PIH (irq %d) nested IRQs\n", irq_num);
Balaji T Ke8deb282009-12-14 00:25:31 +0100449
450 /* install an irq handler to demultiplex the TWL6030 interrupt */
Naga Venkata Srikanth V87343e52013-07-25 16:15:47 +0300451 status = request_threaded_irq(irq_num, NULL, twl6030_irq_thread,
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300452 IRQF_ONESHOT, "TWL6030-PIH", twl6030_irq);
Balaji T Ke8deb282009-12-14 00:25:31 +0100453 if (status < 0) {
Benoit Coussonec1a07b2012-03-02 11:11:26 +0100454 dev_err(dev, "could not claim irq %d: %d\n", irq_num, status);
Balaji T Ke8deb282009-12-14 00:25:31 +0100455 goto fail_irq;
456 }
Axel Lin862de702011-08-11 15:21:00 +0800457
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300458 twl6030_irq->twl_irq = irq_num;
459 register_pm_notifier(&twl6030_irq->pm_nb);
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300460 return 0;
Balaji T Ke8deb282009-12-14 00:25:31 +0100461
Axel Lin862de702011-08-11 15:21:00 +0800462fail_irq:
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300463 irq_domain_remove(twl6030_irq->irq_domain);
Balaji T Ke8deb282009-12-14 00:25:31 +0100464 return status;
465}
466
467int twl6030_exit_irq(void)
468{
Grygorii Strashko0aa8c682013-07-25 16:15:50 +0300469 if (twl6030_irq && twl6030_irq->twl_irq) {
470 unregister_pm_notifier(&twl6030_irq->pm_nb);
471 free_irq(twl6030_irq->twl_irq, NULL);
Grygorii Strashkob32408f2013-07-25 16:15:49 +0300472 /*
473 * TODO: IRQ domain and allocated nested IRQ descriptors
474 * should be freed somehow here. Now It can't be done, because
475 * child devices will not be deleted during removing of
476 * TWL Core driver and they will still contain allocated
477 * virt IRQs in their Resources tables.
478 * The same prevents us from using devm_request_threaded_irq()
479 * in this module.
480 */
Balaji T Ke8deb282009-12-14 00:25:31 +0100481 }
Balaji T Ke8deb282009-12-14 00:25:31 +0100482 return 0;
483}
484