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
};
56 return nvec_write_async(ps2_dev
.nvec
, buf
, sizeof(buf
));
59 static void ps2_stopstreaming(struct serio
*ser_dev
)
61 unsigned char buf
[] = { NVEC_PS2
, CANCEL_AUTO_RECEIVE
};
62 nvec_write_async(ps2_dev
.nvec
, buf
, sizeof(buf
));
65 static int ps2_sendcommand(struct serio
*ser_dev
, unsigned char cmd
)
67 unsigned char buf
[] = { NVEC_PS2
, SEND_COMMAND
, ENABLE_MOUSE
, 1 };
71 dev_dbg(&ser_dev
->dev
, "Sending ps2 cmd %02x\n", cmd
);
72 return nvec_write_async(ps2_dev
.nvec
, buf
, sizeof(buf
));
75 static int nvec_ps2_notifier(struct notifier_block
*nb
,
76 unsigned long event_type
, void *data
)
79 unsigned char *msg
= (unsigned char *)data
;
83 for (i
= 0; i
< msg
[1]; i
++)
84 serio_interrupt(ps2_dev
.ser_dev
, msg
[2 + i
], 0);
85 NVEC_PHD("ps/2 mouse event: ", &msg
[2], msg
[1]);
90 for (i
= 0; i
< (msg
[1] - 2); i
++)
91 serio_interrupt(ps2_dev
.ser_dev
, msg
[i
+ 4], 0);
92 NVEC_PHD("ps/2 mouse reply: ", &msg
[4], msg
[1] - 2);
95 else if (msg
[1] != 2) /* !ack */
96 NVEC_PHD("unhandled mouse event: ", msg
, msg
[1] + 2);
103 static int nvec_mouse_probe(struct platform_device
*pdev
)
105 struct nvec_chip
*nvec
= dev_get_drvdata(pdev
->dev
.parent
);
106 struct serio
*ser_dev
;
107 char mouse_reset
[] = { NVEC_PS2
, SEND_COMMAND
, PSMOUSE_RST
, 3 };
109 ser_dev
= kzalloc(sizeof(struct serio
), GFP_KERNEL
);
113 ser_dev
->id
.type
= SERIO_PS_PSTHRU
;
114 ser_dev
->write
= ps2_sendcommand
;
115 ser_dev
->start
= ps2_startstreaming
;
116 ser_dev
->stop
= ps2_stopstreaming
;
118 strlcpy(ser_dev
->name
, "nvec mouse", sizeof(ser_dev
->name
));
119 strlcpy(ser_dev
->phys
, "nvec", sizeof(ser_dev
->phys
));
121 ps2_dev
.ser_dev
= ser_dev
;
122 ps2_dev
.notifier
.notifier_call
= nvec_ps2_notifier
;
124 nvec_register_notifier(nvec
, &ps2_dev
.notifier
, 0);
126 serio_register_port(ser_dev
);
129 nvec_write_async(nvec
, mouse_reset
, sizeof(mouse_reset
));
134 static int nvec_mouse_remove(struct platform_device
*pdev
)
136 struct nvec_chip
*nvec
= dev_get_drvdata(pdev
->dev
.parent
);
138 ps2_sendcommand(ps2_dev
.ser_dev
, DISABLE_MOUSE
);
139 ps2_stopstreaming(ps2_dev
.ser_dev
);
140 nvec_unregister_notifier(nvec
, &ps2_dev
.notifier
);
141 serio_unregister_port(ps2_dev
.ser_dev
);
146 #ifdef CONFIG_PM_SLEEP
147 static int nvec_mouse_suspend(struct device
*dev
)
150 ps2_sendcommand(ps2_dev
.ser_dev
, DISABLE_MOUSE
);
152 /* send cancel autoreceive */
153 ps2_stopstreaming(ps2_dev
.ser_dev
);
158 static int nvec_mouse_resume(struct device
*dev
)
160 /* start streaming */
161 ps2_startstreaming(ps2_dev
.ser_dev
);
164 ps2_sendcommand(ps2_dev
.ser_dev
, ENABLE_MOUSE
);
170 static const SIMPLE_DEV_PM_OPS(nvec_mouse_pm_ops
, nvec_mouse_suspend
,
173 static struct platform_driver nvec_mouse_driver
= {
174 .probe
= nvec_mouse_probe
,
175 .remove
= nvec_mouse_remove
,
177 .name
= "nvec-mouse",
178 .owner
= THIS_MODULE
,
179 .pm
= &nvec_mouse_pm_ops
,
183 module_platform_driver(nvec_mouse_driver
);
185 MODULE_DESCRIPTION("NVEC mouse driver");
186 MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
187 MODULE_ALIAS("platform:nvec-mouse");
188 MODULE_LICENSE("GPL");