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/init.h> 24 #include <linux/kernel.h> 25 #include <linux/errno.h> 26 #include <linux/input.h> 27 #include <linux/interrupt.h> 28 #include <linux/platform_device.h> 29 #include <linux/mfd/mc13783.h> 30 #include <linux/sched.h> 31 #include <linux/slab.h> 32 33 struct mc13783_pwrb { 34 struct input_dev *pwr; 35 struct mc13xxx *mc13783; 36 #define MC13783_PWRB_B1_POL_INVERT (1 << 0) 37 #define MC13783_PWRB_B2_POL_INVERT (1 << 1) 38 #define MC13783_PWRB_B3_POL_INVERT (1 << 2) 39 int flags; 40 unsigned short keymap[3]; 41 }; 42 43 #define MC13783_REG_INTERRUPT_SENSE_1 5 44 #define MC13783_IRQSENSE1_ONOFD1S (1 << 3) 45 #define MC13783_IRQSENSE1_ONOFD2S (1 << 4) 46 #define MC13783_IRQSENSE1_ONOFD3S (1 << 5) 47 48 #define MC13783_REG_POWER_CONTROL_2 15 49 #define MC13783_POWER_CONTROL_2_ON1BDBNC 4 50 #define MC13783_POWER_CONTROL_2_ON2BDBNC 6 51 #define MC13783_POWER_CONTROL_2_ON3BDBNC 8 52 #define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1) 53 #define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2) 54 #define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3) 55 56 static irqreturn_t button_irq(int irq, void *_priv) 57 { 58 struct mc13783_pwrb *priv = _priv; 59 int val; 60 61 mc13xxx_irq_ack(priv->mc13783, irq); 62 mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val); 63 64 switch (irq) { 65 case MC13783_IRQ_ONOFD1: 66 val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0; 67 if (priv->flags & MC13783_PWRB_B1_POL_INVERT) 68 val ^= 1; 69 input_report_key(priv->pwr, priv->keymap[0], val); 70 break; 71 72 case MC13783_IRQ_ONOFD2: 73 val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0; 74 if (priv->flags & MC13783_PWRB_B2_POL_INVERT) 75 val ^= 1; 76 input_report_key(priv->pwr, priv->keymap[1], val); 77 break; 78 79 case MC13783_IRQ_ONOFD3: 80 val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0; 81 if (priv->flags & MC13783_PWRB_B3_POL_INVERT) 82 val ^= 1; 83 input_report_key(priv->pwr, priv->keymap[2], val); 84 break; 85 } 86 87 input_sync(priv->pwr); 88 89 return IRQ_HANDLED; 90 } 91 92 static int mc13783_pwrbutton_probe(struct platform_device *pdev) 93 { 94 const struct mc13xxx_buttons_platform_data *pdata; 95 struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent); 96 struct input_dev *pwr; 97 struct mc13783_pwrb *priv; 98 int err = 0; 99 int reg = 0; 100 101 pdata = dev_get_platdata(&pdev->dev); 102 if (!pdata) { 103 dev_err(&pdev->dev, "missing platform data\n"); 104 return -ENODEV; 105 } 106 107 pwr = input_allocate_device(); 108 if (!pwr) { 109 dev_dbg(&pdev->dev, "Can't allocate power button\n"); 110 return -ENOMEM; 111 } 112 113 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 114 if (!priv) { 115 err = -ENOMEM; 116 dev_dbg(&pdev->dev, "Can't allocate power button\n"); 117 goto free_input_dev; 118 } 119 120 reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC; 121 reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC; 122 reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC; 123 124 priv->pwr = pwr; 125 priv->mc13783 = mc13783; 126 127 mc13xxx_lock(mc13783); 128 129 if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) { 130 priv->keymap[0] = pdata->b1on_key; 131 if (pdata->b1on_key != KEY_RESERVED) 132 __set_bit(pdata->b1on_key, pwr->keybit); 133 134 if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT) 135 priv->flags |= MC13783_PWRB_B1_POL_INVERT; 136 137 if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN) 138 reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN; 139 140 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1, 141 button_irq, "b1on", priv); 142 if (err) { 143 dev_dbg(&pdev->dev, "Can't request irq\n"); 144 goto free_priv; 145 } 146 } 147 148 if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) { 149 priv->keymap[1] = pdata->b2on_key; 150 if (pdata->b2on_key != KEY_RESERVED) 151 __set_bit(pdata->b2on_key, pwr->keybit); 152 153 if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT) 154 priv->flags |= MC13783_PWRB_B2_POL_INVERT; 155 156 if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN) 157 reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN; 158 159 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2, 160 button_irq, "b2on", priv); 161 if (err) { 162 dev_dbg(&pdev->dev, "Can't request irq\n"); 163 goto free_irq_b1; 164 } 165 } 166 167 if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) { 168 priv->keymap[2] = pdata->b3on_key; 169 if (pdata->b3on_key != KEY_RESERVED) 170 __set_bit(pdata->b3on_key, pwr->keybit); 171 172 if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT) 173 priv->flags |= MC13783_PWRB_B3_POL_INVERT; 174 175 if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN) 176 reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN; 177 178 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3, 179 button_irq, "b3on", priv); 180 if (err) { 181 dev_dbg(&pdev->dev, "Can't request irq: %d\n", err); 182 goto free_irq_b2; 183 } 184 } 185 186 mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg); 187 188 mc13xxx_unlock(mc13783); 189 190 pwr->name = "mc13783_pwrbutton"; 191 pwr->phys = "mc13783_pwrbutton/input0"; 192 pwr->dev.parent = &pdev->dev; 193 194 pwr->keycode = priv->keymap; 195 pwr->keycodemax = ARRAY_SIZE(priv->keymap); 196 pwr->keycodesize = sizeof(priv->keymap[0]); 197 __set_bit(EV_KEY, pwr->evbit); 198 199 err = input_register_device(pwr); 200 if (err) { 201 dev_dbg(&pdev->dev, "Can't register power button: %d\n", err); 202 goto free_irq; 203 } 204 205 platform_set_drvdata(pdev, priv); 206 207 return 0; 208 209 free_irq: 210 mc13xxx_lock(mc13783); 211 212 if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) 213 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv); 214 215 free_irq_b2: 216 if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) 217 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv); 218 219 free_irq_b1: 220 if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) 221 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv); 222 223 free_priv: 224 mc13xxx_unlock(mc13783); 225 kfree(priv); 226 227 free_input_dev: 228 input_free_device(pwr); 229 230 return err; 231 } 232 233 static int mc13783_pwrbutton_remove(struct platform_device *pdev) 234 { 235 struct mc13783_pwrb *priv = platform_get_drvdata(pdev); 236 const struct mc13xxx_buttons_platform_data *pdata; 237 238 pdata = dev_get_platdata(&pdev->dev); 239 240 mc13xxx_lock(priv->mc13783); 241 242 if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) 243 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv); 244 if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) 245 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv); 246 if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) 247 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv); 248 249 mc13xxx_unlock(priv->mc13783); 250 251 input_unregister_device(priv->pwr); 252 kfree(priv); 253 254 return 0; 255 } 256 257 static struct platform_driver mc13783_pwrbutton_driver = { 258 .probe = mc13783_pwrbutton_probe, 259 .remove = mc13783_pwrbutton_remove, 260 .driver = { 261 .name = "mc13783-pwrbutton", 262 .owner = THIS_MODULE, 263 }, 264 }; 265 266 module_platform_driver(mc13783_pwrbutton_driver); 267 268 MODULE_ALIAS("platform:mc13783-pwrbutton"); 269 MODULE_DESCRIPTION("MC13783 Power Button"); 270 MODULE_LICENSE("GPL v2"); 271 MODULE_AUTHOR("Philippe Retornaz"); 272