Michael Hennerich | fba65fe | 2009-10-10 13:54:02 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Keypad driver for Analog Devices ADP5520 MFD PMICs |
| 3 | * |
| 4 | * Copyright 2009 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/input.h> |
| 14 | #include <linux/mfd/adp5520.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Michael Hennerich | fba65fe | 2009-10-10 13:54:02 -0400 | [diff] [blame] | 16 | |
| 17 | struct adp5520_keys { |
| 18 | struct input_dev *input; |
| 19 | struct notifier_block notifier; |
| 20 | struct device *master; |
| 21 | unsigned short keycode[ADP5520_KEYMAPSIZE]; |
| 22 | }; |
| 23 | |
| 24 | static void adp5520_keys_report_event(struct adp5520_keys *dev, |
| 25 | unsigned short keymask, int value) |
| 26 | { |
| 27 | int i; |
| 28 | |
| 29 | for (i = 0; i < ADP5520_MAXKEYS; i++) |
| 30 | if (keymask & (1 << i)) |
| 31 | input_report_key(dev->input, dev->keycode[i], value); |
| 32 | |
| 33 | input_sync(dev->input); |
| 34 | } |
| 35 | |
| 36 | static int adp5520_keys_notifier(struct notifier_block *nb, |
| 37 | unsigned long event, void *data) |
| 38 | { |
| 39 | struct adp5520_keys *dev; |
| 40 | uint8_t reg_val_lo, reg_val_hi; |
| 41 | unsigned short keymask; |
| 42 | |
| 43 | dev = container_of(nb, struct adp5520_keys, notifier); |
| 44 | |
| 45 | if (event & ADP5520_KP_INT) { |
| 46 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo); |
| 47 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi); |
| 48 | |
| 49 | keymask = (reg_val_hi << 8) | reg_val_lo; |
| 50 | /* Read twice to clear */ |
| 51 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo); |
| 52 | adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi); |
| 53 | keymask |= (reg_val_hi << 8) | reg_val_lo; |
| 54 | adp5520_keys_report_event(dev, keymask, 1); |
| 55 | } |
| 56 | |
| 57 | if (event & ADP5520_KR_INT) { |
| 58 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo); |
| 59 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi); |
| 60 | |
| 61 | keymask = (reg_val_hi << 8) | reg_val_lo; |
| 62 | /* Read twice to clear */ |
| 63 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo); |
| 64 | adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi); |
| 65 | keymask |= (reg_val_hi << 8) | reg_val_lo; |
| 66 | adp5520_keys_report_event(dev, keymask, 0); |
| 67 | } |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static int __devinit adp5520_keys_probe(struct platform_device *pdev) |
| 73 | { |
| 74 | struct adp5520_keys_platform_data *pdata = pdev->dev.platform_data; |
| 75 | struct input_dev *input; |
| 76 | struct adp5520_keys *dev; |
| 77 | int ret, i; |
| 78 | unsigned char en_mask, ctl_mask = 0; |
| 79 | |
| 80 | if (pdev->id != ID_ADP5520) { |
| 81 | dev_err(&pdev->dev, "only ADP5520 supports Keypad\n"); |
| 82 | return -EINVAL; |
| 83 | } |
| 84 | |
| 85 | if (pdata == NULL) { |
| 86 | dev_err(&pdev->dev, "missing platform data\n"); |
| 87 | return -EINVAL; |
| 88 | } |
| 89 | |
| 90 | if (!(pdata->rows_en_mask && pdata->cols_en_mask)) |
| 91 | return -EINVAL; |
| 92 | |
| 93 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 94 | if (dev == NULL) { |
| 95 | dev_err(&pdev->dev, "failed to alloc memory\n"); |
| 96 | return -ENOMEM; |
| 97 | } |
| 98 | |
| 99 | input = input_allocate_device(); |
| 100 | if (!input) { |
| 101 | ret = -ENOMEM; |
| 102 | goto err; |
| 103 | } |
| 104 | |
| 105 | dev->master = pdev->dev.parent; |
| 106 | dev->input = input; |
| 107 | |
| 108 | input->name = pdev->name; |
| 109 | input->phys = "adp5520-keys/input0"; |
| 110 | input->dev.parent = &pdev->dev; |
| 111 | |
| 112 | input_set_drvdata(input, dev); |
| 113 | |
| 114 | input->id.bustype = BUS_I2C; |
| 115 | input->id.vendor = 0x0001; |
| 116 | input->id.product = 0x5520; |
| 117 | input->id.version = 0x0001; |
| 118 | |
| 119 | input->keycodesize = sizeof(dev->keycode[0]); |
| 120 | input->keycodemax = pdata->keymapsize; |
| 121 | input->keycode = dev->keycode; |
| 122 | |
| 123 | memcpy(dev->keycode, pdata->keymap, |
| 124 | pdata->keymapsize * input->keycodesize); |
| 125 | |
| 126 | /* setup input device */ |
| 127 | __set_bit(EV_KEY, input->evbit); |
| 128 | |
| 129 | if (pdata->repeat) |
| 130 | __set_bit(EV_REP, input->evbit); |
| 131 | |
| 132 | for (i = 0; i < input->keycodemax; i++) |
| 133 | __set_bit(dev->keycode[i], input->keybit); |
| 134 | __clear_bit(KEY_RESERVED, input->keybit); |
| 135 | |
| 136 | ret = input_register_device(input); |
| 137 | if (ret) { |
| 138 | dev_err(&pdev->dev, "unable to register input device\n"); |
| 139 | goto err; |
| 140 | } |
| 141 | |
| 142 | en_mask = pdata->rows_en_mask | pdata->cols_en_mask; |
| 143 | |
| 144 | ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask); |
| 145 | |
| 146 | if (en_mask & ADP5520_COL_C3) |
| 147 | ctl_mask |= ADP5520_C3_MODE; |
| 148 | |
| 149 | if (en_mask & ADP5520_ROW_R3) |
| 150 | ctl_mask |= ADP5520_R3_MODE; |
| 151 | |
| 152 | if (ctl_mask) |
| 153 | ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL, |
| 154 | ctl_mask); |
| 155 | |
| 156 | ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP, |
| 157 | pdata->rows_en_mask); |
| 158 | |
| 159 | if (ret) { |
| 160 | dev_err(&pdev->dev, "failed to write\n"); |
| 161 | ret = -EIO; |
| 162 | goto err1; |
| 163 | } |
| 164 | |
| 165 | dev->notifier.notifier_call = adp5520_keys_notifier; |
| 166 | ret = adp5520_register_notifier(dev->master, &dev->notifier, |
| 167 | ADP5520_KP_IEN | ADP5520_KR_IEN); |
| 168 | if (ret) { |
| 169 | dev_err(&pdev->dev, "failed to register notifier\n"); |
| 170 | goto err1; |
| 171 | } |
| 172 | |
| 173 | platform_set_drvdata(pdev, dev); |
| 174 | return 0; |
| 175 | |
| 176 | err1: |
| 177 | input_unregister_device(input); |
| 178 | input = NULL; |
| 179 | err: |
| 180 | input_free_device(input); |
| 181 | kfree(dev); |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | static int __devexit adp5520_keys_remove(struct platform_device *pdev) |
| 186 | { |
| 187 | struct adp5520_keys *dev = platform_get_drvdata(pdev); |
| 188 | |
| 189 | adp5520_unregister_notifier(dev->master, &dev->notifier, |
| 190 | ADP5520_KP_IEN | ADP5520_KR_IEN); |
| 191 | |
| 192 | input_unregister_device(dev->input); |
| 193 | kfree(dev); |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static struct platform_driver adp5520_keys_driver = { |
| 198 | .driver = { |
| 199 | .name = "adp5520-keys", |
| 200 | .owner = THIS_MODULE, |
| 201 | }, |
| 202 | .probe = adp5520_keys_probe, |
| 203 | .remove = __devexit_p(adp5520_keys_remove), |
| 204 | }; |
JJ Ding | 5146c84 | 2011-11-29 11:08:39 -0800 | [diff] [blame] | 205 | module_platform_driver(adp5520_keys_driver); |
Michael Hennerich | fba65fe | 2009-10-10 13:54:02 -0400 | [diff] [blame] | 206 | |
| 207 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 208 | MODULE_DESCRIPTION("Keys ADP5520 Driver"); |
| 209 | MODULE_LICENSE("GPL"); |
| 210 | MODULE_ALIAS("platform:adp5520-keys"); |