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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | // SPDX-License-Identifier: GPL-2.0 /* * nvec_kbd: keyboard driver for a NVIDIA compliant embedded controller * * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net> * * Authors: Pierre-Hugues Husson <phhusson@free.fr> * Marc Dietrich <marvin24@gmx.de> */ #include <linux/module.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/delay.h> #include <linux/platform_device.h> #include "nvec-keytable.h" #include "nvec.h" enum kbd_subcmds { CNFG_WAKE = 3, CNFG_WAKE_KEY_REPORTING, SET_LEDS = 0xed, ENABLE_KBD = 0xf4, DISABLE_KBD, }; static unsigned char keycodes[ARRAY_SIZE(code_tab_102us) + ARRAY_SIZE(extcode_tab_us102)]; struct nvec_keys { struct input_dev *input; struct notifier_block notifier; struct nvec_chip *nvec; bool caps_lock; }; static struct nvec_keys keys_dev; static void nvec_kbd_toggle_led(void) { char buf[] = { NVEC_KBD, SET_LEDS, 0 }; keys_dev.caps_lock = !keys_dev.caps_lock; if (keys_dev.caps_lock) /* should be BIT(0) only, firmware bug? */ buf[2] = BIT(0) | BIT(1) | BIT(2); nvec_write_async(keys_dev.nvec, buf, sizeof(buf)); } static int nvec_keys_notifier(struct notifier_block *nb, unsigned long event_type, void *data) { int code, state; unsigned char *msg = data; if (event_type == NVEC_KB_EVT) { int _size = (msg[0] & (3 << 5)) >> 5; /* power on/off button */ if (_size == NVEC_VAR_SIZE) return NOTIFY_STOP; if (_size == NVEC_3BYTES) msg++; code = msg[1] & 0x7f; state = msg[1] & 0x80; if (code_tabs[_size][code] == KEY_CAPSLOCK && state) nvec_kbd_toggle_led(); input_report_key(keys_dev.input, code_tabs[_size][code], !state); input_sync(keys_dev.input); return NOTIFY_STOP; } return NOTIFY_DONE; } static int nvec_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { struct nvec_chip *nvec = keys_dev.nvec; char buf[] = { NVEC_KBD, SET_LEDS, 0 }; if (type == EV_REP) return 0; if (type != EV_LED) return -1; if (code != LED_CAPSL) return -1; buf[2] = !!value; nvec_write_async(nvec, buf, sizeof(buf)); return 0; } static int nvec_kbd_probe(struct platform_device *pdev) { struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent); int i, j, err; struct input_dev *idev; char clear_leds[] = { NVEC_KBD, SET_LEDS, 0 }, enable_kbd[] = { NVEC_KBD, ENABLE_KBD }, cnfg_wake[] = { NVEC_KBD, CNFG_WAKE, true, true }, cnfg_wake_key_reporting[] = { NVEC_KBD, CNFG_WAKE_KEY_REPORTING, true }; j = 0; for (i = 0; i < ARRAY_SIZE(code_tab_102us); ++i) keycodes[j++] = code_tab_102us[i]; for (i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i) keycodes[j++] = extcode_tab_us102[i]; idev = devm_input_allocate_device(&pdev->dev); if (!idev) return -ENOMEM; idev->name = "nvec keyboard"; idev->phys = "nvec"; idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_LED); idev->ledbit[0] = BIT_MASK(LED_CAPSL); idev->event = nvec_kbd_event; idev->keycode = keycodes; idev->keycodesize = sizeof(unsigned char); idev->keycodemax = ARRAY_SIZE(keycodes); for (i = 0; i < ARRAY_SIZE(keycodes); ++i) set_bit(keycodes[i], idev->keybit); clear_bit(0, idev->keybit); err = input_register_device(idev); if (err) return err; keys_dev.input = idev; keys_dev.notifier.notifier_call = nvec_keys_notifier; keys_dev.nvec = nvec; nvec_register_notifier(nvec, &keys_dev.notifier, 0); /* Enable keyboard */ nvec_write_sync(nvec, enable_kbd, 2, NULL); /* configures wake on special keys */ nvec_write_sync(nvec, cnfg_wake, 4, NULL); /* enable wake key reporting */ nvec_write_sync(nvec, cnfg_wake_key_reporting, 3, NULL); /* Disable caps lock LED */ nvec_write_sync(nvec, clear_leds, sizeof(clear_leds), NULL); return 0; } static void nvec_kbd_remove(struct platform_device *pdev) { struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent); char disable_kbd[] = { NVEC_KBD, DISABLE_KBD }, uncnfg_wake_key_reporting[] = { NVEC_KBD, CNFG_WAKE_KEY_REPORTING, false }; nvec_write_async(nvec, uncnfg_wake_key_reporting, 3); nvec_write_async(nvec, disable_kbd, 2); nvec_unregister_notifier(nvec, &keys_dev.notifier); } static struct platform_driver nvec_kbd_driver = { .probe = nvec_kbd_probe, .remove_new = nvec_kbd_remove, .driver = { .name = "nvec-kbd", }, }; module_platform_driver(nvec_kbd_driver); MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>"); MODULE_DESCRIPTION("NVEC keyboard driver"); MODULE_ALIAS("platform:nvec-kbd"); MODULE_LICENSE("GPL"); |