Initial import

1 files changed, 192 insertions, 0 deletions

diff --git a/drivers/staging/nvec/nvec_kbd.c b/drivers/staging/nvec/nvec_kbd.c
new file mode 100644
index 000000000..e881e6b26
--- /dev/null
+++ b/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 <ac100@lists.launchpad.net>
+ *
+ * Authors:  Pierre-Hugues Husson <phhusson@free.fr>
+ *           Marc Dietrich <marvin24@gmx.de>
+ *
+ * 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 <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 = (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 <marvin24@gmx.de>");
+MODULE_DESCRIPTION("NVEC keyboard driver");
+MODULE_ALIAS("platform:nvec-kbd");
+MODULE_LICENSE("GPL");