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path: root/drivers/input/misc/mc13783-pwrbutton.c
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Diffstat (limited to 'drivers/input/misc/mc13783-pwrbutton.c')
-rw-r--r--drivers/input/misc/mc13783-pwrbutton.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/drivers/input/misc/mc13783-pwrbutton.c b/drivers/input/misc/mc13783-pwrbutton.c
new file mode 100644
index 000000000..afdf8ef25
--- /dev/null
+++ b/drivers/input/misc/mc13783-pwrbutton.c
@@ -0,0 +1,269 @@
+/**
+ * Copyright (C) 2011 Philippe Rétornaz
+ *
+ * Based on twl4030-pwrbutton driver by:
+ * Peter De Schrijver <peter.de-schrijver@nokia.com>
+ * Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+struct mc13783_pwrb {
+ struct input_dev *pwr;
+ struct mc13xxx *mc13783;
+#define MC13783_PWRB_B1_POL_INVERT (1 << 0)
+#define MC13783_PWRB_B2_POL_INVERT (1 << 1)
+#define MC13783_PWRB_B3_POL_INVERT (1 << 2)
+ int flags;
+ unsigned short keymap[3];
+};
+
+#define MC13783_REG_INTERRUPT_SENSE_1 5
+#define MC13783_IRQSENSE1_ONOFD1S (1 << 3)
+#define MC13783_IRQSENSE1_ONOFD2S (1 << 4)
+#define MC13783_IRQSENSE1_ONOFD3S (1 << 5)
+
+#define MC13783_REG_POWER_CONTROL_2 15
+#define MC13783_POWER_CONTROL_2_ON1BDBNC 4
+#define MC13783_POWER_CONTROL_2_ON2BDBNC 6
+#define MC13783_POWER_CONTROL_2_ON3BDBNC 8
+#define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1)
+#define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2)
+#define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3)
+
+static irqreturn_t button_irq(int irq, void *_priv)
+{
+ struct mc13783_pwrb *priv = _priv;
+ int val;
+
+ mc13xxx_irq_ack(priv->mc13783, irq);
+ mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
+
+ switch (irq) {
+ case MC13783_IRQ_ONOFD1:
+ val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
+ if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
+ val ^= 1;
+ input_report_key(priv->pwr, priv->keymap[0], val);
+ break;
+
+ case MC13783_IRQ_ONOFD2:
+ val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
+ if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
+ val ^= 1;
+ input_report_key(priv->pwr, priv->keymap[1], val);
+ break;
+
+ case MC13783_IRQ_ONOFD3:
+ val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
+ if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
+ val ^= 1;
+ input_report_key(priv->pwr, priv->keymap[2], val);
+ break;
+ }
+
+ input_sync(priv->pwr);
+
+ return IRQ_HANDLED;
+}
+
+static int mc13783_pwrbutton_probe(struct platform_device *pdev)
+{
+ const struct mc13xxx_buttons_platform_data *pdata;
+ struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
+ struct input_dev *pwr;
+ struct mc13783_pwrb *priv;
+ int err = 0;
+ int reg = 0;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ return -ENODEV;
+ }
+
+ pwr = input_allocate_device();
+ if (!pwr) {
+ dev_dbg(&pdev->dev, "Can't allocate power button\n");
+ return -ENOMEM;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ err = -ENOMEM;
+ dev_dbg(&pdev->dev, "Can't allocate power button\n");
+ goto free_input_dev;
+ }
+
+ reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
+ reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
+ reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
+
+ priv->pwr = pwr;
+ priv->mc13783 = mc13783;
+
+ mc13xxx_lock(mc13783);
+
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
+ priv->keymap[0] = pdata->b1on_key;
+ if (pdata->b1on_key != KEY_RESERVED)
+ __set_bit(pdata->b1on_key, pwr->keybit);
+
+ if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B1_POL_INVERT;
+
+ if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
+
+ err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
+ button_irq, "b1on", priv);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't request irq\n");
+ goto free_priv;
+ }
+ }
+
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
+ priv->keymap[1] = pdata->b2on_key;
+ if (pdata->b2on_key != KEY_RESERVED)
+ __set_bit(pdata->b2on_key, pwr->keybit);
+
+ if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B2_POL_INVERT;
+
+ if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
+
+ err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
+ button_irq, "b2on", priv);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't request irq\n");
+ goto free_irq_b1;
+ }
+ }
+
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
+ priv->keymap[2] = pdata->b3on_key;
+ if (pdata->b3on_key != KEY_RESERVED)
+ __set_bit(pdata->b3on_key, pwr->keybit);
+
+ if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
+ priv->flags |= MC13783_PWRB_B3_POL_INVERT;
+
+ if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
+ reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
+
+ err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
+ button_irq, "b3on", priv);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
+ goto free_irq_b2;
+ }
+ }
+
+ mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
+
+ mc13xxx_unlock(mc13783);
+
+ pwr->name = "mc13783_pwrbutton";
+ pwr->phys = "mc13783_pwrbutton/input0";
+ pwr->dev.parent = &pdev->dev;
+
+ pwr->keycode = priv->keymap;
+ pwr->keycodemax = ARRAY_SIZE(priv->keymap);
+ pwr->keycodesize = sizeof(priv->keymap[0]);
+ __set_bit(EV_KEY, pwr->evbit);
+
+ err = input_register_device(pwr);
+ if (err) {
+ dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
+ goto free_irq;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+
+free_irq:
+ mc13xxx_lock(mc13783);
+
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
+
+free_irq_b2:
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
+
+free_irq_b1:
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
+
+free_priv:
+ mc13xxx_unlock(mc13783);
+ kfree(priv);
+
+free_input_dev:
+ input_free_device(pwr);
+
+ return err;
+}
+
+static int mc13783_pwrbutton_remove(struct platform_device *pdev)
+{
+ struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
+ const struct mc13xxx_buttons_platform_data *pdata;
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ mc13xxx_lock(priv->mc13783);
+
+ if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
+ if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
+ if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+ mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
+
+ mc13xxx_unlock(priv->mc13783);
+
+ input_unregister_device(priv->pwr);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver mc13783_pwrbutton_driver = {
+ .probe = mc13783_pwrbutton_probe,
+ .remove = mc13783_pwrbutton_remove,
+ .driver = {
+ .name = "mc13783-pwrbutton",
+ },
+};
+
+module_platform_driver(mc13783_pwrbutton_driver);
+
+MODULE_ALIAS("platform:mc13783-pwrbutton");
+MODULE_DESCRIPTION("MC13783 Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Philippe Retornaz");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 16:10:17 +0000