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