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30fc7ac3 PR |
1 | /** |
2 | * Copyright (C) 2011 Philippe Rétornaz | |
3 | * | |
4 | * Based on twl4030-pwrbutton driver by: | |
5 | * Peter De Schrijver <peter.de-schrijver@nokia.com> | |
6 | * Felipe Balbi <felipe.balbi@nokia.com> | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General | |
9 | * Public License. See the file "COPYING" in the main directory of this | |
10 | * archive for more details. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/input.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/mfd/mc13783.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/slab.h> | |
32 | ||
33 | struct mc13783_pwrb { | |
34 | struct input_dev *pwr; | |
35 | struct mc13xxx *mc13783; | |
36 | #define MC13783_PWRB_B1_POL_INVERT (1 << 0) | |
37 | #define MC13783_PWRB_B2_POL_INVERT (1 << 1) | |
38 | #define MC13783_PWRB_B3_POL_INVERT (1 << 2) | |
39 | int flags; | |
40 | unsigned short keymap[3]; | |
41 | }; | |
42 | ||
43 | #define MC13783_REG_INTERRUPT_SENSE_1 5 | |
44 | #define MC13783_IRQSENSE1_ONOFD1S (1 << 3) | |
45 | #define MC13783_IRQSENSE1_ONOFD2S (1 << 4) | |
46 | #define MC13783_IRQSENSE1_ONOFD3S (1 << 5) | |
47 | ||
48 | #define MC13783_REG_POWER_CONTROL_2 15 | |
49 | #define MC13783_POWER_CONTROL_2_ON1BDBNC 4 | |
50 | #define MC13783_POWER_CONTROL_2_ON2BDBNC 6 | |
51 | #define MC13783_POWER_CONTROL_2_ON3BDBNC 8 | |
52 | #define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1) | |
53 | #define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2) | |
54 | #define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3) | |
55 | ||
56 | static irqreturn_t button_irq(int irq, void *_priv) | |
57 | { | |
58 | struct mc13783_pwrb *priv = _priv; | |
59 | int val; | |
60 | ||
61 | mc13xxx_irq_ack(priv->mc13783, irq); | |
62 | mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val); | |
63 | ||
64 | switch (irq) { | |
65 | case MC13783_IRQ_ONOFD1: | |
66 | val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0; | |
67 | if (priv->flags & MC13783_PWRB_B1_POL_INVERT) | |
68 | val ^= 1; | |
69 | input_report_key(priv->pwr, priv->keymap[0], val); | |
70 | break; | |
71 | ||
72 | case MC13783_IRQ_ONOFD2: | |
73 | val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0; | |
74 | if (priv->flags & MC13783_PWRB_B2_POL_INVERT) | |
75 | val ^= 1; | |
76 | input_report_key(priv->pwr, priv->keymap[1], val); | |
77 | break; | |
78 | ||
79 | case MC13783_IRQ_ONOFD3: | |
80 | val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0; | |
81 | if (priv->flags & MC13783_PWRB_B3_POL_INVERT) | |
82 | val ^= 1; | |
83 | input_report_key(priv->pwr, priv->keymap[2], val); | |
84 | break; | |
85 | } | |
86 | ||
87 | input_sync(priv->pwr); | |
88 | ||
89 | return IRQ_HANDLED; | |
90 | } | |
91 | ||
92 | static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev) | |
93 | { | |
94 | const struct mc13xxx_buttons_platform_data *pdata; | |
95 | struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent); | |
96 | struct input_dev *pwr; | |
97 | struct mc13783_pwrb *priv; | |
98 | int err = 0; | |
99 | int reg = 0; | |
100 | ||
101 | pdata = dev_get_platdata(&pdev->dev); | |
102 | if (!pdata) { | |
103 | dev_err(&pdev->dev, "missing platform data\n"); | |
104 | return -ENODEV; | |
105 | } | |
106 | ||
107 | pwr = input_allocate_device(); | |
108 | if (!pwr) { | |
109 | dev_dbg(&pdev->dev, "Can't allocate power button\n"); | |
110 | return -ENOMEM; | |
111 | } | |
112 | ||
113 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
114 | if (!priv) { | |
115 | err = -ENOMEM; | |
116 | dev_dbg(&pdev->dev, "Can't allocate power button\n"); | |
117 | goto free_input_dev; | |
118 | } | |
119 | ||
120 | reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC; | |
121 | reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC; | |
122 | reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC; | |
123 | ||
124 | priv->pwr = pwr; | |
125 | priv->mc13783 = mc13783; | |
126 | ||
127 | mc13xxx_lock(mc13783); | |
128 | ||
129 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) { | |
130 | priv->keymap[0] = pdata->b1on_key; | |
131 | if (pdata->b1on_key != KEY_RESERVED) | |
132 | __set_bit(pdata->b1on_key, pwr->keybit); | |
133 | ||
134 | if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT) | |
135 | priv->flags |= MC13783_PWRB_B1_POL_INVERT; | |
136 | ||
137 | if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN) | |
138 | reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN; | |
139 | ||
140 | err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1, | |
141 | button_irq, "b1on", priv); | |
142 | if (err) { | |
143 | dev_dbg(&pdev->dev, "Can't request irq\n"); | |
144 | goto free_priv; | |
145 | } | |
146 | } | |
147 | ||
148 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) { | |
149 | priv->keymap[1] = pdata->b2on_key; | |
150 | if (pdata->b2on_key != KEY_RESERVED) | |
151 | __set_bit(pdata->b2on_key, pwr->keybit); | |
152 | ||
153 | if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT) | |
154 | priv->flags |= MC13783_PWRB_B2_POL_INVERT; | |
155 | ||
156 | if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN) | |
157 | reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN; | |
158 | ||
159 | err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2, | |
160 | button_irq, "b2on", priv); | |
161 | if (err) { | |
162 | dev_dbg(&pdev->dev, "Can't request irq\n"); | |
163 | goto free_irq_b1; | |
164 | } | |
165 | } | |
166 | ||
167 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) { | |
168 | priv->keymap[2] = pdata->b3on_key; | |
169 | if (pdata->b3on_key != KEY_RESERVED) | |
170 | __set_bit(pdata->b3on_key, pwr->keybit); | |
171 | ||
172 | if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT) | |
173 | priv->flags |= MC13783_PWRB_B3_POL_INVERT; | |
174 | ||
175 | if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN) | |
176 | reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN; | |
177 | ||
178 | err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3, | |
179 | button_irq, "b3on", priv); | |
180 | if (err) { | |
181 | dev_dbg(&pdev->dev, "Can't request irq: %d\n", err); | |
182 | goto free_irq_b2; | |
183 | } | |
184 | } | |
185 | ||
186 | mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg); | |
187 | ||
188 | mc13xxx_unlock(mc13783); | |
189 | ||
190 | pwr->name = "mc13783_pwrbutton"; | |
191 | pwr->phys = "mc13783_pwrbutton/input0"; | |
192 | pwr->dev.parent = &pdev->dev; | |
193 | ||
194 | pwr->keycode = priv->keymap; | |
195 | pwr->keycodemax = ARRAY_SIZE(priv->keymap); | |
196 | pwr->keycodesize = sizeof(priv->keymap[0]); | |
197 | __set_bit(EV_KEY, pwr->evbit); | |
198 | ||
199 | err = input_register_device(pwr); | |
200 | if (err) { | |
201 | dev_dbg(&pdev->dev, "Can't register power button: %d\n", err); | |
202 | goto free_irq; | |
203 | } | |
204 | ||
205 | platform_set_drvdata(pdev, priv); | |
206 | ||
207 | return 0; | |
208 | ||
209 | free_irq: | |
210 | mc13xxx_lock(mc13783); | |
211 | ||
212 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) | |
213 | mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv); | |
214 | ||
215 | free_irq_b2: | |
216 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) | |
217 | mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv); | |
218 | ||
219 | free_irq_b1: | |
220 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) | |
221 | mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv); | |
222 | ||
223 | free_priv: | |
224 | mc13xxx_unlock(mc13783); | |
225 | kfree(priv); | |
226 | ||
227 | free_input_dev: | |
228 | input_free_device(pwr); | |
229 | ||
230 | return err; | |
231 | } | |
232 | ||
233 | static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev) | |
234 | { | |
235 | struct mc13783_pwrb *priv = platform_get_drvdata(pdev); | |
236 | const struct mc13xxx_buttons_platform_data *pdata; | |
237 | ||
238 | pdata = dev_get_platdata(&pdev->dev); | |
239 | ||
240 | mc13xxx_lock(priv->mc13783); | |
241 | ||
242 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) | |
243 | mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv); | |
244 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) | |
245 | mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv); | |
246 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) | |
247 | mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv); | |
248 | ||
249 | mc13xxx_unlock(priv->mc13783); | |
250 | ||
251 | input_unregister_device(priv->pwr); | |
252 | kfree(priv); | |
253 | platform_set_drvdata(pdev, NULL); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
18b2b181 | 258 | static struct platform_driver mc13783_pwrbutton_driver = { |
30fc7ac3 | 259 | .probe = mc13783_pwrbutton_probe, |
1cb0aa88 | 260 | .remove = mc13783_pwrbutton_remove, |
30fc7ac3 PR |
261 | .driver = { |
262 | .name = "mc13783-pwrbutton", | |
263 | .owner = THIS_MODULE, | |
264 | }, | |
265 | }; | |
266 | ||
18b2b181 | 267 | module_platform_driver(mc13783_pwrbutton_driver); |
30fc7ac3 PR |
268 | |
269 | MODULE_ALIAS("platform:mc13783-pwrbutton"); | |
270 | MODULE_DESCRIPTION("MC13783 Power Button"); | |
271 | MODULE_LICENSE("GPL v2"); | |
272 | MODULE_AUTHOR("Philippe Retornaz"); |