/** * 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/init.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 __devinit 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 __devexit 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); platform_set_drvdata(pdev, NULL); return 0; } static struct platform_driver mc13783_pwrbutton_driver = { .probe = mc13783_pwrbutton_probe, .remove = __devexit_p(mc13783_pwrbutton_remove), .driver = { .name = "mc13783-pwrbutton", .owner = THIS_MODULE, }, }; module_platform_driver(mc13783_pwrbutton_driver); MODULE_ALIAS("platform:mc13783-pwrbutton"); MODULE_DESCRIPTION("MC13783 Power Button"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Philippe Retornaz");