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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-08-05 11:14:15 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-08-07 04:55:48 -0400
commita09e64fbc0094e3073dbb09c3b4bfe4ab669244b (patch)
tree69689f467179891b498bd7423fcf61925173db31 /arch/arm/mach-pxa/include/mach/i2c.h
parenta1b81a84fff05dbfef45b7012c26e1fee9973e5d (diff)
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/include/mach/i2c.h')
-rw-r--r--arch/arm/mach-pxa/include/mach/i2c.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/i2c.h b/arch/arm/mach-pxa/include/mach/i2c.h
new file mode 100644
index 000000000000..80596b013443
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/i2c.h
@@ -0,0 +1,77 @@
1/*
2 * i2c_pxa.h
3 *
4 * Copyright (C) 2002 Intrinsyc Software Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11#ifndef _I2C_PXA_H_
12#define _I2C_PXA_H_
13
14#if 0
15#define DEF_TIMEOUT 3
16#else
17/* need a longer timeout if we're dealing with the fact we may well be
18 * looking at a multi-master environment
19*/
20#define DEF_TIMEOUT 32
21#endif
22
23#define BUS_ERROR (-EREMOTEIO)
24#define XFER_NAKED (-ECONNREFUSED)
25#define I2C_RETRY (-2000) /* an error has occurred retry transmit */
26
27/* ICR initialize bit values
28*
29* 15. FM 0 (100 Khz operation)
30* 14. UR 0 (No unit reset)
31* 13. SADIE 0 (Disables the unit from interrupting on slave addresses
32* matching its slave address)
33* 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration
34* in master mode)
35* 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode)
36* 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent)
37* 9. IRFIE 1 (Enable interrupts from full buffer received)
38* 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty)
39* 7. GCD 1 (Disables i2c unit response to general call messages as a slave)
40* 6. IUE 0 (Disable unit until we change settings)
41* 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL)
42* 4. MA 0 (Only send stop with the ICR stop bit)
43* 3. TB 0 (We are not transmitting a byte initially)
44* 2. ACKNAK 0 (Send an ACK after the unit receives a byte)
45* 1. STOP 0 (Do not send a STOP)
46* 0. START 0 (Do not send a START)
47*
48*/
49#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
50
51/* I2C status register init values
52 *
53 * 10. BED 1 (Clear bus error detected)
54 * 9. SAD 1 (Clear slave address detected)
55 * 7. IRF 1 (Clear IDBR Receive Full)
56 * 6. ITE 1 (Clear IDBR Transmit Empty)
57 * 5. ALD 1 (Clear Arbitration Loss Detected)
58 * 4. SSD 1 (Clear Slave Stop Detected)
59 */
60#define I2C_ISR_INIT 0x7FF /* status register init */
61
62struct i2c_slave_client;
63
64struct i2c_pxa_platform_data {
65 unsigned int slave_addr;
66 struct i2c_slave_client *slave;
67 unsigned int class;
68 int use_pio;
69};
70
71extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
72
73#ifdef CONFIG_PXA27x
74extern void pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info);
75#endif
76
77#endif