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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/gpio.h>
13#include <linux/i2c.h>
14#include <linux/irq.h>
15#include <linux/mfd/core.h>
16#include <linux/interrupt.h>
17#include <linux/irqdomain.h>
18#include <linux/regmap.h>
19
20#include <linux/mfd/wm8994/core.h>
21#include <linux/mfd/wm8994/pdata.h>
22#include <linux/mfd/wm8994/registers.h>
23
24#include <linux/delay.h>
25
26static const struct regmap_irq wm8994_irqs[] = {
27 [WM8994_IRQ_TEMP_SHUT] = {
28 .reg_offset = 1,
29 .mask = WM8994_TEMP_SHUT_EINT,
30 },
31 [WM8994_IRQ_MIC1_DET] = {
32 .reg_offset = 1,
33 .mask = WM8994_MIC1_DET_EINT,
34 },
35 [WM8994_IRQ_MIC1_SHRT] = {
36 .reg_offset = 1,
37 .mask = WM8994_MIC1_SHRT_EINT,
38 },
39 [WM8994_IRQ_MIC2_DET] = {
40 .reg_offset = 1,
41 .mask = WM8994_MIC2_DET_EINT,
42 },
43 [WM8994_IRQ_MIC2_SHRT] = {
44 .reg_offset = 1,
45 .mask = WM8994_MIC2_SHRT_EINT,
46 },
47 [WM8994_IRQ_FLL1_LOCK] = {
48 .reg_offset = 1,
49 .mask = WM8994_FLL1_LOCK_EINT,
50 },
51 [WM8994_IRQ_FLL2_LOCK] = {
52 .reg_offset = 1,
53 .mask = WM8994_FLL2_LOCK_EINT,
54 },
55 [WM8994_IRQ_SRC1_LOCK] = {
56 .reg_offset = 1,
57 .mask = WM8994_SRC1_LOCK_EINT,
58 },
59 [WM8994_IRQ_SRC2_LOCK] = {
60 .reg_offset = 1,
61 .mask = WM8994_SRC2_LOCK_EINT,
62 },
63 [WM8994_IRQ_AIF1DRC1_SIG_DET] = {
64 .reg_offset = 1,
65 .mask = WM8994_AIF1DRC1_SIG_DET,
66 },
67 [WM8994_IRQ_AIF1DRC2_SIG_DET] = {
68 .reg_offset = 1,
69 .mask = WM8994_AIF1DRC2_SIG_DET_EINT,
70 },
71 [WM8994_IRQ_AIF2DRC_SIG_DET] = {
72 .reg_offset = 1,
73 .mask = WM8994_AIF2DRC_SIG_DET_EINT,
74 },
75 [WM8994_IRQ_FIFOS_ERR] = {
76 .reg_offset = 1,
77 .mask = WM8994_FIFOS_ERR_EINT,
78 },
79 [WM8994_IRQ_WSEQ_DONE] = {
80 .reg_offset = 1,
81 .mask = WM8994_WSEQ_DONE_EINT,
82 },
83 [WM8994_IRQ_DCS_DONE] = {
84 .reg_offset = 1,
85 .mask = WM8994_DCS_DONE_EINT,
86 },
87 [WM8994_IRQ_TEMP_WARN] = {
88 .reg_offset = 1,
89 .mask = WM8994_TEMP_WARN_EINT,
90 },
91 [WM8994_IRQ_GPIO(1)] = {
92 .mask = WM8994_GP1_EINT,
93 },
94 [WM8994_IRQ_GPIO(2)] = {
95 .mask = WM8994_GP2_EINT,
96 },
97 [WM8994_IRQ_GPIO(3)] = {
98 .mask = WM8994_GP3_EINT,
99 },
100 [WM8994_IRQ_GPIO(4)] = {
101 .mask = WM8994_GP4_EINT,
102 },
103 [WM8994_IRQ_GPIO(5)] = {
104 .mask = WM8994_GP5_EINT,
105 },
106 [WM8994_IRQ_GPIO(6)] = {
107 .mask = WM8994_GP6_EINT,
108 },
109 [WM8994_IRQ_GPIO(7)] = {
110 .mask = WM8994_GP7_EINT,
111 },
112 [WM8994_IRQ_GPIO(8)] = {
113 .mask = WM8994_GP8_EINT,
114 },
115 [WM8994_IRQ_GPIO(9)] = {
116 .mask = WM8994_GP8_EINT,
117 },
118 [WM8994_IRQ_GPIO(10)] = {
119 .mask = WM8994_GP10_EINT,
120 },
121 [WM8994_IRQ_GPIO(11)] = {
122 .mask = WM8994_GP11_EINT,
123 },
124};
125
126static const struct regmap_irq_chip wm8994_irq_chip = {
127 .name = "wm8994",
128 .irqs = wm8994_irqs,
129 .num_irqs = ARRAY_SIZE(wm8994_irqs),
130
131 .num_regs = 2,
132 .status_base = WM8994_INTERRUPT_STATUS_1,
133 .mask_base = WM8994_INTERRUPT_STATUS_1_MASK,
134 .ack_base = WM8994_INTERRUPT_STATUS_1,
135 .runtime_pm = true,
136};
137
138static void wm8994_edge_irq_enable(struct irq_data *data)
139{
140}
141
142static void wm8994_edge_irq_disable(struct irq_data *data)
143{
144}
145
146static struct irq_chip wm8994_edge_irq_chip = {
147 .name = "wm8994_edge",
148 .irq_disable = wm8994_edge_irq_disable,
149 .irq_enable = wm8994_edge_irq_enable,
150};
151
152static irqreturn_t wm8994_edge_irq(int irq, void *data)
153{
154 struct wm8994 *wm8994 = data;
155
156 while (gpio_get_value_cansleep(wm8994->pdata.irq_gpio))
157 handle_nested_irq(irq_create_mapping(wm8994->edge_irq, 0));
158
159 return IRQ_HANDLED;
160}
161
162static int wm8994_edge_irq_map(struct irq_domain *h, unsigned int virq,
163 irq_hw_number_t hw)
164{
165 struct wm8994 *wm8994 = h->host_data;
166
167 irq_set_chip_data(virq, wm8994);
168 irq_set_chip_and_handler(virq, &wm8994_edge_irq_chip, handle_edge_irq);
169 irq_set_nested_thread(virq, 1);
170 irq_set_noprobe(virq);
171
172 return 0;
173}
174
175static const struct irq_domain_ops wm8994_edge_irq_ops = {
176 .map = wm8994_edge_irq_map,
177 .xlate = irq_domain_xlate_twocell,
178};
179
180int wm8994_irq_init(struct wm8994 *wm8994)
181{
182 int ret;
183 unsigned long irqflags;
184 struct wm8994_pdata *pdata = &wm8994->pdata;
185
186 if (!wm8994->irq) {
187 dev_warn(wm8994->dev,
188 "No interrupt specified, no interrupts\n");
189 wm8994->irq_base = 0;
190 return 0;
191 }
192
193
194 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
195 if (pdata->irq_flags)
196 irqflags = pdata->irq_flags;
197
198
199 if (irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
200 if (gpio_to_irq(pdata->irq_gpio) != wm8994->irq) {
201 dev_warn(wm8994->dev, "IRQ %d is not GPIO %d (%d)\n",
202 wm8994->irq, pdata->irq_gpio,
203 gpio_to_irq(pdata->irq_gpio));
204 wm8994->irq = gpio_to_irq(pdata->irq_gpio);
205 }
206
207 ret = devm_gpio_request_one(wm8994->dev, pdata->irq_gpio,
208 GPIOF_IN, "WM8994 IRQ");
209
210 if (ret != 0) {
211 dev_err(wm8994->dev, "Failed to get IRQ GPIO: %d\n",
212 ret);
213 return ret;
214 }
215
216 wm8994->edge_irq = irq_domain_add_linear(NULL, 1,
217 &wm8994_edge_irq_ops,
218 wm8994);
219
220 ret = regmap_add_irq_chip(wm8994->regmap,
221 irq_create_mapping(wm8994->edge_irq,
222 0),
223 IRQF_ONESHOT,
224 wm8994->irq_base, &wm8994_irq_chip,
225 &wm8994->irq_data);
226 if (ret != 0) {
227 dev_err(wm8994->dev, "Failed to get IRQ: %d\n",
228 ret);
229 return ret;
230 }
231
232 ret = request_threaded_irq(wm8994->irq,
233 NULL, wm8994_edge_irq,
234 irqflags,
235 "WM8994 edge", wm8994);
236 } else {
237 ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
238 irqflags,
239 wm8994->irq_base, &wm8994_irq_chip,
240 &wm8994->irq_data);
241 }
242
243 if (ret != 0) {
244 dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret);
245 return ret;
246 }
247
248
249 wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
250
251 return 0;
252}
253EXPORT_SYMBOL(wm8994_irq_init);
254
255void wm8994_irq_exit(struct wm8994 *wm8994)
256{
257 regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);
258}
259EXPORT_SYMBOL(wm8994_irq_exit);
260
