2 * nvec_ps2: mouse driver for a NVIDIA compliant embedded controller
4 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
6 * Authors: Pierre-Hugues Husson <phhusson@free.fr>
7 * Ilya Petrov <ilya.muromec@gmail.com>
8 * Marc Dietrich <marvin24@gmx.de>
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/serio.h>
19 #include <linux/delay.h>
20 #include <linux/platform_device.h>
26 #define ENABLE_MOUSE 0xf4
27 #define DISABLE_MOUSE 0xf5
28 #define PSMOUSE_RST 0xff
31 #define NVEC_PHD(str, buf, len) \
32 print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
33 16, 1, buf, len, false)
35 #define NVEC_PHD(str, buf, len)
46 struct serio *ser_dev;
47 struct notifier_block notifier;
48 struct nvec_chip *nvec;
51 static struct nvec_ps2 ps2_dev;
53 static int ps2_startstreaming(struct serio *ser_dev)
55 unsigned char buf[] = { NVEC_PS2, AUTO_RECEIVE_N, PACKET_SIZE };
57 return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
60 static void ps2_stopstreaming(struct serio *ser_dev)
62 unsigned char buf[] = { NVEC_PS2, CANCEL_AUTO_RECEIVE };
64 nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
67 static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
69 unsigned char buf[] = { NVEC_PS2, SEND_COMMAND, ENABLE_MOUSE, 1 };
73 dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
74 return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
77 static int nvec_ps2_notifier(struct notifier_block *nb,
78 unsigned long event_type, void *data)
81 unsigned char *msg = data;
85 for (i = 0; i < msg[1]; i++)
86 serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
87 NVEC_PHD("ps/2 mouse event: ", &msg[2], msg[1]);
92 for (i = 0; i < (msg[1] - 2); i++)
93 serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
94 NVEC_PHD("ps/2 mouse reply: ", &msg[4], msg[1] - 2);
97 else if (msg[1] != 2) /* !ack */
98 NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);
105 static int nvec_mouse_probe(struct platform_device *pdev)
107 struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
108 struct serio *ser_dev;
110 ser_dev = kzalloc(sizeof(*ser_dev), GFP_KERNEL);
114 ser_dev->id.type = SERIO_8042;
115 ser_dev->write = ps2_sendcommand;
116 ser_dev->start = ps2_startstreaming;
117 ser_dev->stop = ps2_stopstreaming;
119 strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
120 strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
122 ps2_dev.ser_dev = ser_dev;
123 ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
125 nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
127 serio_register_port(ser_dev);
132 static int nvec_mouse_remove(struct platform_device *pdev)
134 struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
136 ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
137 ps2_stopstreaming(ps2_dev.ser_dev);
138 nvec_unregister_notifier(nvec, &ps2_dev.notifier);
139 serio_unregister_port(ps2_dev.ser_dev);
144 #ifdef CONFIG_PM_SLEEP
145 static int nvec_mouse_suspend(struct device *dev)
148 ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
150 /* send cancel autoreceive */
151 ps2_stopstreaming(ps2_dev.ser_dev);
156 static int nvec_mouse_resume(struct device *dev)
158 /* start streaming */
159 ps2_startstreaming(ps2_dev.ser_dev);
162 ps2_sendcommand(ps2_dev.ser_dev, ENABLE_MOUSE);
168 static SIMPLE_DEV_PM_OPS(nvec_mouse_pm_ops, nvec_mouse_suspend,
171 static struct platform_driver nvec_mouse_driver = {
172 .probe = nvec_mouse_probe,
173 .remove = nvec_mouse_remove,
175 .name = "nvec-mouse",
176 .pm = &nvec_mouse_pm_ops,
180 module_platform_driver(nvec_mouse_driver);
182 MODULE_DESCRIPTION("NVEC mouse driver");
183 MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
184 MODULE_ALIAS("platform:nvec-mouse");
185 MODULE_LICENSE("GPL");