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- /*
- * nvec_ps2: mouse 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>
- * Ilya Petrov <ilya.muromec@gmail.com>
- * 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/serio.h>
- #include <linux/delay.h>
- #include <linux/platform_device.h>
- #include "nvec.h"
- #define PACKET_SIZE 6
- #define ENABLE_MOUSE 0xf4
- #define DISABLE_MOUSE 0xf5
- #define PSMOUSE_RST 0xff
- #ifdef NVEC_PS2_DEBUG
- #define NVEC_PHD(str, buf, len) \
- print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
- 16, 1, buf, len, false)
- #else
- #define NVEC_PHD(str, buf, len)
- #endif
- enum ps2_subcmds {
- SEND_COMMAND = 1,
- RECEIVE_N,
- AUTO_RECEIVE_N,
- CANCEL_AUTO_RECEIVE,
- };
- struct nvec_ps2 {
- struct serio *ser_dev;
- struct notifier_block notifier;
- struct nvec_chip *nvec;
- };
- static struct nvec_ps2 ps2_dev;
- static int ps2_startstreaming(struct serio *ser_dev)
- {
- unsigned char buf[] = { NVEC_PS2, AUTO_RECEIVE_N, PACKET_SIZE };
- return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
- }
- static void ps2_stopstreaming(struct serio *ser_dev)
- {
- unsigned char buf[] = { NVEC_PS2, CANCEL_AUTO_RECEIVE };
- nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
- }
- static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
- {
- unsigned char buf[] = { NVEC_PS2, SEND_COMMAND, ENABLE_MOUSE, 1 };
- buf[2] = cmd & 0xff;
- dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
- return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
- }
- static int nvec_ps2_notifier(struct notifier_block *nb,
- unsigned long event_type, void *data)
- {
- int i;
- unsigned char *msg = (unsigned char *)data;
- switch (event_type) {
- case NVEC_PS2_EVT:
- for (i = 0; i < msg[1]; i++)
- serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
- NVEC_PHD("ps/2 mouse event: ", &msg[2], msg[1]);
- return NOTIFY_STOP;
- case NVEC_PS2:
- if (msg[2] == 1) {
- for (i = 0; i < (msg[1] - 2); i++)
- serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
- NVEC_PHD("ps/2 mouse reply: ", &msg[4], msg[1] - 2);
- }
- else if (msg[1] != 2) /* !ack */
- NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);
- return NOTIFY_STOP;
- }
- return NOTIFY_DONE;
- }
- static int nvec_mouse_probe(struct platform_device *pdev)
- {
- struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
- struct serio *ser_dev;
- ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
- if (!ser_dev)
- return -ENOMEM;
- ser_dev->id.type = SERIO_8042;
- ser_dev->write = ps2_sendcommand;
- ser_dev->start = ps2_startstreaming;
- ser_dev->stop = ps2_stopstreaming;
- strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
- strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
- ps2_dev.ser_dev = ser_dev;
- ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
- ps2_dev.nvec = nvec;
- nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
- serio_register_port(ser_dev);
- return 0;
- }
- static int nvec_mouse_remove(struct platform_device *pdev)
- {
- struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
- ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
- ps2_stopstreaming(ps2_dev.ser_dev);
- nvec_unregister_notifier(nvec, &ps2_dev.notifier);
- serio_unregister_port(ps2_dev.ser_dev);
- return 0;
- }
- #ifdef CONFIG_PM_SLEEP
- static int nvec_mouse_suspend(struct device *dev)
- {
- /* disable mouse */
- ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
- /* send cancel autoreceive */
- ps2_stopstreaming(ps2_dev.ser_dev);
- return 0;
- }
- static int nvec_mouse_resume(struct device *dev)
- {
- /* start streaming */
- ps2_startstreaming(ps2_dev.ser_dev);
- /* enable mouse */
- ps2_sendcommand(ps2_dev.ser_dev, ENABLE_MOUSE);
- return 0;
- }
- #endif
- static SIMPLE_DEV_PM_OPS(nvec_mouse_pm_ops, nvec_mouse_suspend,
- nvec_mouse_resume);
- static struct platform_driver nvec_mouse_driver = {
- .probe = nvec_mouse_probe,
- .remove = nvec_mouse_remove,
- .driver = {
- .name = "nvec-mouse",
- .pm = &nvec_mouse_pm_ops,
- },
- };
- module_platform_driver(nvec_mouse_driver);
- MODULE_DESCRIPTION("NVEC mouse driver");
- MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
- MODULE_ALIAS("platform:nvec-mouse");
- MODULE_LICENSE("GPL");
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