Annotation of prex-old/dev/i386/pc/mouse.c, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * mouse.c - ps2 mouse support
32: */
33:
34: /*
35: * PS/2 mouse packet
36: *
37: * Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
38: * ------ ------ ------ ------ ------ ----- ------ ------ ------
39: * Byte 1 Yovf Xovf Ysign Xsign 1 MidBtn RgtBtn LftBtn
40: * Byte 2 X movement
41: * Byte 3 Y movement
42: */
43:
44: #include <driver.h>
45: #include <cpu.h>
46:
47: #include "kmc.h"
48:
49: /* #define DEBUG_MOUSE */
50:
51: #ifdef DEBUG_MOUSE
52: #define mou_printf(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
53: #else
54: #define mou_printf(fmt, args...) do {} while (0)
55: #endif
56:
57:
58: #define MOUSE_IRQ 12
59:
60: static int mouse_init(void);
61: static int mouse_open(device_t, int);
62: static int mouse_close(device_t);
63: static int mouse_read(device_t, char *, size_t *, int);
64:
65: /*
66: * Driver structure
67: */
68: struct driver mouse_drv = {
69: /* name */ "PS/2 Mouse",
70: /* order */ 6,
71: /* init */ mouse_init,
72: };
73:
74: static struct devio mouse_io = {
75: /* open */ mouse_open,
76: /* close */ mouse_close,
77: /* read */ mouse_read,
78: /* write */ NULL,
79: /* ioctl */ NULL,
80: /* event */ NULL,
81: };
82:
83: static device_t mouse_dev; /* Mouse object */
84: static int mouse_irq; /* Handle for mouse irq */
85: static u_char packet[3]; /* Mouse packet */
86: static int index = 0;
87:
88: /*
89: * Write aux device command
90: */
91: static void
92: aux_command(int val)
93: {
94:
95: mou_printf("%x\n", val);
96: wait_ibe();
97: outb(0x60, KMC_CMD);
98: wait_ibe();
99: outb(val, KMC_DATA);
100: }
101:
102: /*
103: * Returns 0 on success, -1 on failure.
104: */
105: static int
106: aux_write(int val)
107: {
108: int rc = -1;
109:
110: mou_printf("val=%x\n", val);
111: irq_lock();
112:
113: /* Write the value to the device */
114: wait_ibe();
115: outb(0xd4, KMC_CMD);
116: wait_ibe();
117: outb(val, KMC_DATA);
118:
119: /* Get the ack */
120: wait_obf();
121: if ((inb(KMC_STS) & 0x20) == 0x20) {
122: if (inb(KMC_DATA) == 0xfa)
123: rc = 0;
124: }
125: irq_unlock();
126: #ifdef DEBUG_MOUSE
127: if (rc)
128: mou_printf("error val=%x\n", val);
129: #endif
130: return rc;
131: }
132:
133: /*
134: * Interrupt handler
135: */
136: static int
137: mouse_isr(int irq)
138: {
139: u_char dat, id;
140:
141: if ((inb(KMC_STS) & 0x21) != 0x21)
142: return 0;
143:
144: dat = inb(KMC_DATA);
145: if (dat == 0xaa) { /* BAT comp (reconnect) ? */
146: printk("BAT comp");
147: index = 0;
148: wait_obf();
149: if ((inb(KMC_STS) & 0x20) == 0x20) {
150: id = inb(KMC_DATA);
151: printk("Mouse ID=%x\n", id);
152: }
153: aux_write(0xf4); /* Enable aux device */
154: return 0;
155: }
156:
157: packet[index++] = dat;
158: if (index < 3)
159: return 0;
160: index = 0;
161: mou_printf("%x:%d:%d\n", packet[0], packet[1], packet[2]);
162: return 0;
163: }
164:
165: /*
166: * Open
167: */
168: static int
169: mouse_open(device_t dev, int mode)
170: {
171: mou_printf("dev=%x\n", dev);
172: return 0;
173: }
174:
175: /*
176: * Close
177: */
178: static int
179: mouse_close(device_t dev)
180: {
181: mou_printf("dev=%x\n", dev);
182: return 0;
183: }
184:
185: /*
186: * Read
187: */
188: static int
189: mouse_read(device_t dev, char *buf, size_t *nbyte, int blkno)
190: {
191: return 0;
192: }
193:
194: /*
195: * Initialize
196: */
197: static int
198: mouse_init(void)
199: {
200:
201: printk("Mouse sampling rate=100 samples/sec\n");
202:
203: /* Create device object */
204: mouse_dev = device_create(&mouse_io, "mouse", DF_CHR);
205: ASSERT(mouse_dev);
206:
207: /* Allocate IRQ */
208: mouse_irq = irq_attach(MOUSE_IRQ, IPL_INPUT, 0, mouse_isr, NULL);
209: ASSERT(mouse_irq != -1);
210:
211: wait_ibe();
212: outb(0xa8, KMC_CMD); /* Enable aux */
213:
214: aux_write(0xf3); /* Set sample rate */
215: aux_write(100); /* 100 samples/sec */
216:
217: aux_write(0xe8); /* Set resolution */
218: aux_write(3); /* 8 counts per mm */
219: aux_write(0xe7); /* 2:1 scaling */
220:
221: aux_write(0xf4); /* Enable aux device */
222: aux_command(0x47); /* Enable controller ints */
223: return 0;
224: }
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