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/kernel.h> |
24 | #include <linux/errno.h> |
25 | #include <linux/input.h> |
26 | #include <linux/interrupt.h> |
27 | #include <linux/platform_device.h> |
28 | #include <linux/mfd/mc13783.h> |
29 | #include <linux/sched.h> |
30 | #include <linux/slab.h> |
31 | |
32 | struct mc13783_pwrb { |
33 | struct input_dev *pwr; |
34 | struct mc13xxx *mc13783; |
35 | #define MC13783_PWRB_B1_POL_INVERT (1 << 0) |
36 | #define MC13783_PWRB_B2_POL_INVERT (1 << 1) |
37 | #define MC13783_PWRB_B3_POL_INVERT (1 << 2) |
38 | int flags; |
39 | unsigned short keymap[3]; |
40 | }; |
41 | |
42 | #define MC13783_REG_INTERRUPT_SENSE_1 5 |
43 | #define MC13783_IRQSENSE1_ONOFD1S (1 << 3) |
44 | #define MC13783_IRQSENSE1_ONOFD2S (1 << 4) |
45 | #define MC13783_IRQSENSE1_ONOFD3S (1 << 5) |
46 | |
47 | #define MC13783_REG_POWER_CONTROL_2 15 |
48 | #define MC13783_POWER_CONTROL_2_ON1BDBNC 4 |
49 | #define MC13783_POWER_CONTROL_2_ON2BDBNC 6 |
50 | #define MC13783_POWER_CONTROL_2_ON3BDBNC 8 |
51 | #define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1) |
52 | #define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2) |
53 | #define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3) |
54 | |
55 | static irqreturn_t button_irq(int irq, void *_priv) |
56 | { |
57 | struct mc13783_pwrb *priv = _priv; |
58 | int val; |
59 | |
60 | mc13xxx_irq_ack(mc13xxx: priv->mc13783, irq); |
61 | mc13xxx_reg_read(mc13xxx: priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, val: &val); |
62 | |
63 | switch (irq) { |
64 | case MC13783_IRQ_ONOFD1: |
65 | val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0; |
66 | if (priv->flags & MC13783_PWRB_B1_POL_INVERT) |
67 | val ^= 1; |
68 | input_report_key(dev: priv->pwr, code: priv->keymap[0], value: val); |
69 | break; |
70 | |
71 | case MC13783_IRQ_ONOFD2: |
72 | val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0; |
73 | if (priv->flags & MC13783_PWRB_B2_POL_INVERT) |
74 | val ^= 1; |
75 | input_report_key(dev: priv->pwr, code: priv->keymap[1], value: val); |
76 | break; |
77 | |
78 | case MC13783_IRQ_ONOFD3: |
79 | val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0; |
80 | if (priv->flags & MC13783_PWRB_B3_POL_INVERT) |
81 | val ^= 1; |
82 | input_report_key(dev: priv->pwr, code: priv->keymap[2], value: val); |
83 | break; |
84 | } |
85 | |
86 | input_sync(dev: priv->pwr); |
87 | |
88 | return IRQ_HANDLED; |
89 | } |
90 | |
91 | static int mc13783_pwrbutton_probe(struct platform_device *pdev) |
92 | { |
93 | const struct mc13xxx_buttons_platform_data *pdata; |
94 | struct mc13xxx *mc13783 = dev_get_drvdata(dev: pdev->dev.parent); |
95 | struct input_dev *pwr; |
96 | struct mc13783_pwrb *priv; |
97 | int err = 0; |
98 | int reg = 0; |
99 | |
100 | pdata = dev_get_platdata(dev: &pdev->dev); |
101 | if (!pdata) { |
102 | dev_err(&pdev->dev, "missing platform data\n" ); |
103 | return -ENODEV; |
104 | } |
105 | |
106 | pwr = input_allocate_device(); |
107 | if (!pwr) { |
108 | dev_dbg(&pdev->dev, "Can't allocate power button\n" ); |
109 | return -ENOMEM; |
110 | } |
111 | |
112 | priv = kzalloc(size: sizeof(*priv), GFP_KERNEL); |
113 | if (!priv) { |
114 | err = -ENOMEM; |
115 | dev_dbg(&pdev->dev, "Can't allocate power button\n" ); |
116 | goto free_input_dev; |
117 | } |
118 | |
119 | reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC; |
120 | reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC; |
121 | reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC; |
122 | |
123 | priv->pwr = pwr; |
124 | priv->mc13783 = mc13783; |
125 | |
126 | mc13xxx_lock(mc13xxx: mc13783); |
127 | |
128 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) { |
129 | priv->keymap[0] = pdata->b1on_key; |
130 | if (pdata->b1on_key != KEY_RESERVED) |
131 | __set_bit(pdata->b1on_key, pwr->keybit); |
132 | |
133 | if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT) |
134 | priv->flags |= MC13783_PWRB_B1_POL_INVERT; |
135 | |
136 | if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN) |
137 | reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN; |
138 | |
139 | err = mc13xxx_irq_request(mc13xxx: mc13783, MC13783_IRQ_ONOFD1, |
140 | handler: button_irq, name: "b1on" , dev: priv); |
141 | if (err) { |
142 | dev_dbg(&pdev->dev, "Can't request irq\n" ); |
143 | goto free_priv; |
144 | } |
145 | } |
146 | |
147 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) { |
148 | priv->keymap[1] = pdata->b2on_key; |
149 | if (pdata->b2on_key != KEY_RESERVED) |
150 | __set_bit(pdata->b2on_key, pwr->keybit); |
151 | |
152 | if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT) |
153 | priv->flags |= MC13783_PWRB_B2_POL_INVERT; |
154 | |
155 | if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN) |
156 | reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN; |
157 | |
158 | err = mc13xxx_irq_request(mc13xxx: mc13783, MC13783_IRQ_ONOFD2, |
159 | handler: button_irq, name: "b2on" , dev: priv); |
160 | if (err) { |
161 | dev_dbg(&pdev->dev, "Can't request irq\n" ); |
162 | goto free_irq_b1; |
163 | } |
164 | } |
165 | |
166 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) { |
167 | priv->keymap[2] = pdata->b3on_key; |
168 | if (pdata->b3on_key != KEY_RESERVED) |
169 | __set_bit(pdata->b3on_key, pwr->keybit); |
170 | |
171 | if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT) |
172 | priv->flags |= MC13783_PWRB_B3_POL_INVERT; |
173 | |
174 | if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN) |
175 | reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN; |
176 | |
177 | err = mc13xxx_irq_request(mc13xxx: mc13783, MC13783_IRQ_ONOFD3, |
178 | handler: button_irq, name: "b3on" , dev: priv); |
179 | if (err) { |
180 | dev_dbg(&pdev->dev, "Can't request irq: %d\n" , err); |
181 | goto free_irq_b2; |
182 | } |
183 | } |
184 | |
185 | mc13xxx_reg_rmw(mc13xxx: mc13783, MC13783_REG_POWER_CONTROL_2, mask: 0x3FE, val: reg); |
186 | |
187 | mc13xxx_unlock(mc13xxx: mc13783); |
188 | |
189 | pwr->name = "mc13783_pwrbutton" ; |
190 | pwr->phys = "mc13783_pwrbutton/input0" ; |
191 | pwr->dev.parent = &pdev->dev; |
192 | |
193 | pwr->keycode = priv->keymap; |
194 | pwr->keycodemax = ARRAY_SIZE(priv->keymap); |
195 | pwr->keycodesize = sizeof(priv->keymap[0]); |
196 | __set_bit(EV_KEY, pwr->evbit); |
197 | |
198 | err = input_register_device(pwr); |
199 | if (err) { |
200 | dev_dbg(&pdev->dev, "Can't register power button: %d\n" , err); |
201 | goto free_irq; |
202 | } |
203 | |
204 | platform_set_drvdata(pdev, data: priv); |
205 | |
206 | return 0; |
207 | |
208 | free_irq: |
209 | mc13xxx_lock(mc13xxx: mc13783); |
210 | |
211 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) |
212 | mc13xxx_irq_free(mc13xxx: mc13783, MC13783_IRQ_ONOFD3, dev: priv); |
213 | |
214 | free_irq_b2: |
215 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) |
216 | mc13xxx_irq_free(mc13xxx: mc13783, MC13783_IRQ_ONOFD2, dev: priv); |
217 | |
218 | free_irq_b1: |
219 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) |
220 | mc13xxx_irq_free(mc13xxx: mc13783, MC13783_IRQ_ONOFD1, dev: priv); |
221 | |
222 | free_priv: |
223 | mc13xxx_unlock(mc13xxx: mc13783); |
224 | kfree(objp: priv); |
225 | |
226 | free_input_dev: |
227 | input_free_device(dev: pwr); |
228 | |
229 | return err; |
230 | } |
231 | |
232 | static int mc13783_pwrbutton_remove(struct platform_device *pdev) |
233 | { |
234 | struct mc13783_pwrb *priv = platform_get_drvdata(pdev); |
235 | const struct mc13xxx_buttons_platform_data *pdata; |
236 | |
237 | pdata = dev_get_platdata(dev: &pdev->dev); |
238 | |
239 | mc13xxx_lock(mc13xxx: priv->mc13783); |
240 | |
241 | if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) |
242 | mc13xxx_irq_free(mc13xxx: priv->mc13783, MC13783_IRQ_ONOFD3, dev: priv); |
243 | if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) |
244 | mc13xxx_irq_free(mc13xxx: priv->mc13783, MC13783_IRQ_ONOFD2, dev: priv); |
245 | if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) |
246 | mc13xxx_irq_free(mc13xxx: priv->mc13783, MC13783_IRQ_ONOFD1, dev: priv); |
247 | |
248 | mc13xxx_unlock(mc13xxx: priv->mc13783); |
249 | |
250 | input_unregister_device(priv->pwr); |
251 | kfree(objp: priv); |
252 | |
253 | return 0; |
254 | } |
255 | |
256 | static struct platform_driver mc13783_pwrbutton_driver = { |
257 | .probe = mc13783_pwrbutton_probe, |
258 | .remove = mc13783_pwrbutton_remove, |
259 | .driver = { |
260 | .name = "mc13783-pwrbutton" , |
261 | }, |
262 | }; |
263 | |
264 | module_platform_driver(mc13783_pwrbutton_driver); |
265 | |
266 | MODULE_ALIAS("platform:mc13783-pwrbutton" ); |
267 | MODULE_DESCRIPTION("MC13783 Power Button" ); |
268 | MODULE_LICENSE("GPL v2" ); |
269 | MODULE_AUTHOR("Philippe Retornaz" ); |
270 | |