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kmi.h
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1 /*
2  * linux/include/asm-arm/hardware/amba_kmi.h
3  *
4  * Internal header file for AMBA KMI ports
5  *
6  * Copyright (C) 2000 Deep Blue Solutions Ltd.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  *
22  *
23  * ---------------------------------------------------------------------------
24  * From ARM PrimeCell(tm) PS2 Keyboard/Mouse Interface (PL050) Technical
25  * Reference Manual - ARM DDI 0143B - see http://www.arm.com/
26  * ---------------------------------------------------------------------------
27  */
28 #ifndef ASM_ARM_HARDWARE_AMBA_KMI_H
29 #define ASM_ARM_HARDWARE_AMBA_KMI_H
30 
31 /*
32  * KMI control register:
33  * KMICR_TYPE 0 = PS2/AT mode, 1 = No line control bit mode
34  * KMICR_RXINTREN 1 = enable RX interrupts
35  * KMICR_TXINTREN 1 = enable TX interrupts
36  * KMICR_EN 1 = enable KMI
37  * KMICR_FD 1 = force KMI data low
38  * KMICR_FC 1 = force KMI clock low
39  */
40 #define KMICR (KMI_BASE + 0x00)
41 #define KMICR_TYPE (1 << 5)
42 #define KMICR_RXINTREN (1 << 4)
43 #define KMICR_TXINTREN (1 << 3)
44 #define KMICR_EN (1 << 2)
45 #define KMICR_FD (1 << 1)
46 #define KMICR_FC (1 << 0)
47 
48 /*
49  * KMI status register:
50  * KMISTAT_TXEMPTY 1 = transmitter register empty
51  * KMISTAT_TXBUSY 1 = currently sending data
52  * KMISTAT_RXFULL 1 = receiver register ready to be read
53  * KMISTAT_RXBUSY 1 = currently receiving data
54  * KMISTAT_RXPARITY parity of last databyte received
55  * KMISTAT_IC current level of KMI clock input
56  * KMISTAT_ID current level of KMI data input
57  */
58 #define KMISTAT (KMI_BASE + 0x04)
59 #define KMISTAT_TXEMPTY (1 << 6)
60 #define KMISTAT_TXBUSY (1 << 5)
61 #define KMISTAT_RXFULL (1 << 4)
62 #define KMISTAT_RXBUSY (1 << 3)
63 #define KMISTAT_RXPARITY (1 << 2)
64 #define KMISTAT_IC (1 << 1)
65 #define KMISTAT_ID (1 << 0)
66 
67 /*
68  * KMI data register
69  */
70 #define KMIDATA (KMI_BASE + 0x08)
71 
72 /*
73  * KMI clock divisor: to generate 8MHz internal clock
74  * div = (ref / 8MHz) - 1; 0 <= div <= 15
75  */
76 #define KMICLKDIV (KMI_BASE + 0x0c)
77 
78 /*
79  * KMI interrupt register:
80  * KMIIR_TXINTR 1 = transmit interrupt asserted
81  * KMIIR_RXINTR 1 = receive interrupt asserted
82  */
83 #define KMIIR (KMI_BASE + 0x10)
84 #define KMIIR_TXINTR (1 << 1)
85 #define KMIIR_RXINTR (1 << 0)
86 
87 /*
88  * The size of the KMI primecell
89  */
90 #define KMI_SIZE (0x100)
91 
92 #endif