2 * Copyright (C) 2011 Philippe Rétornaz
4 * Based on twl4030-pwrbutton driver by:
5 * Peter De Schrijver <peter.de-schrijver@nokia.com>
6 * Felipe Balbi <felipe.balbi@nokia.com>
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.
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.
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
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>
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)
39 unsigned short keymap[3];
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)
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)
55 static irqreturn_t button_irq(int irq, void *_priv)
57 struct mc13783_pwrb *priv = _priv;
60 mc13xxx_irq_ack(priv->mc13783, irq);
61 mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
64 case MC13783_IRQ_ONOFD1:
65 val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
66 if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
68 input_report_key(priv->pwr, priv->keymap[0], val);
71 case MC13783_IRQ_ONOFD2:
72 val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
73 if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
75 input_report_key(priv->pwr, priv->keymap[1], val);
78 case MC13783_IRQ_ONOFD3:
79 val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
80 if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
82 input_report_key(priv->pwr, priv->keymap[2], val);
86 input_sync(priv->pwr);
91 static int mc13783_pwrbutton_probe(struct platform_device *pdev)
93 const struct mc13xxx_buttons_platform_data *pdata;
94 struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
95 struct input_dev *pwr;
96 struct mc13783_pwrb *priv;
100 pdata = dev_get_platdata(&pdev->dev);
102 dev_err(&pdev->dev, "missing platform data\n");
106 pwr = input_allocate_device();
108 dev_dbg(&pdev->dev, "Can't allocate power button\n");
112 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
115 dev_dbg(&pdev->dev, "Can't allocate power button\n");
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;
124 priv->mc13783 = mc13783;
126 mc13xxx_lock(mc13783);
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);
133 if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
134 priv->flags |= MC13783_PWRB_B1_POL_INVERT;
136 if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
137 reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
139 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
140 button_irq, "b1on", priv);
142 dev_dbg(&pdev->dev, "Can't request irq\n");
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);
152 if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
153 priv->flags |= MC13783_PWRB_B2_POL_INVERT;
155 if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
156 reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
158 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
159 button_irq, "b2on", priv);
161 dev_dbg(&pdev->dev, "Can't request irq\n");
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);
171 if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
172 priv->flags |= MC13783_PWRB_B3_POL_INVERT;
174 if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
175 reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
177 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
178 button_irq, "b3on", priv);
180 dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
185 mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
187 mc13xxx_unlock(mc13783);
189 pwr->name = "mc13783_pwrbutton";
190 pwr->phys = "mc13783_pwrbutton/input0";
191 pwr->dev.parent = &pdev->dev;
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);
198 err = input_register_device(pwr);
200 dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
204 platform_set_drvdata(pdev, priv);
209 mc13xxx_lock(mc13783);
211 if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
212 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
215 if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
216 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
219 if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
220 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
223 mc13xxx_unlock(mc13783);
227 input_free_device(pwr);
232 static int mc13783_pwrbutton_remove(struct platform_device *pdev)
234 struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
235 const struct mc13xxx_buttons_platform_data *pdata;
237 pdata = dev_get_platdata(&pdev->dev);
239 mc13xxx_lock(priv->mc13783);
241 if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
242 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
243 if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
244 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
245 if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
246 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
248 mc13xxx_unlock(priv->mc13783);
250 input_unregister_device(priv->pwr);
256 static struct platform_driver mc13783_pwrbutton_driver = {
257 .probe = mc13783_pwrbutton_probe,
258 .remove = mc13783_pwrbutton_remove,
260 .name = "mc13783-pwrbutton",
264 module_platform_driver(mc13783_pwrbutton_driver);
266 MODULE_ALIAS("platform:mc13783-pwrbutton");
267 MODULE_DESCRIPTION("MC13783 Power Button");
268 MODULE_LICENSE("GPL v2");
269 MODULE_AUTHOR("Philippe Retornaz");