X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fstaging%2Fnvec%2Fnvec_kbd.c;fp=kernel%2Fdrivers%2Fstaging%2Fnvec%2Fnvec_kbd.c;h=e881e6b26a4c7af93209d7241660f43d165eb645;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/staging/nvec/nvec_kbd.c b/kernel/drivers/staging/nvec/nvec_kbd.c new file mode 100644 index 000000000..e881e6b26 --- /dev/null +++ b/kernel/drivers/staging/nvec/nvec_kbd.c @@ -0,0 +1,192 @@ +/* + * nvec_kbd: keyboard driver for a NVIDIA compliant embedded controller + * + * Copyright (C) 2011 The AC100 Kernel Team + * + * Authors: Pierre-Hugues Husson + * Marc Dietrich + * + * 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. + * + */ + +#include +#include +#include +#include +#include + +#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 = (unsigned char *)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); + 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_async(nvec, enable_kbd, 2); + + /* configures wake on special keys */ + nvec_write_async(nvec, cnfg_wake, 4); + /* enable wake key reporting */ + nvec_write_async(nvec, cnfg_wake_key_reporting, 3); + + /* Disable caps lock LED */ + nvec_write_async(nvec, clear_leds, sizeof(clear_leds)); + + return 0; +} + +static int 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); + + return 0; +} + +static struct platform_driver nvec_kbd_driver = { + .probe = nvec_kbd_probe, + .remove = nvec_kbd_remove, + .driver = { + .name = "nvec-kbd", + }, +}; + +module_platform_driver(nvec_kbd_driver); + +MODULE_AUTHOR("Marc Dietrich "); +MODULE_DESCRIPTION("NVEC keyboard driver"); +MODULE_ALIAS("platform:nvec-kbd"); +MODULE_LICENSE("GPL");