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[linux-2.6.git] / include / asm-avr32 / arch-at32ap / smc.h
1 /*
2  * Static Memory Controller for AT32 chips
3  *
4  * Copyright (C) 2006 Atmel Corporation
5  *
6  * Inspired by the OMAP2 General-Purpose Memory Controller interface
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 version 2 as
10  * published by the Free Software Foundation.
11  */
12 #ifndef __ARCH_AT32AP_SMC_H
13 #define __ARCH_AT32AP_SMC_H
14
15 /*
16  * All timing parameters are in nanoseconds.
17  */
18 struct smc_config {
19         /* Delay from address valid to assertion of given strobe */
20         u16             ncs_read_setup;
21         u16             nrd_setup;
22         u16             ncs_write_setup;
23         u16             nwe_setup;
24
25         /* Pulse length of given strobe */
26         u16             ncs_read_pulse;
27         u16             nrd_pulse;
28         u16             ncs_write_pulse;
29         u16             nwe_pulse;
30
31         /* Total cycle length of given operation */
32         u16             read_cycle;
33         u16             write_cycle;
34
35         /* Bus width in bytes */
36         u8              bus_width;
37
38         /*
39          * 0: Data is sampled on rising edge of NCS
40          * 1: Data is sampled on rising edge of NRD
41          */
42         unsigned int    nrd_controlled:1;
43
44         /*
45          * 0: Data is driven on falling edge of NCS
46          * 1: Data is driven on falling edge of NWR
47          */
48         unsigned int    nwe_controlled:1;
49
50         /*
51          * 0: Byte select access type
52          * 1: Byte write access type
53          */
54         unsigned int    byte_write:1;
55 };
56
57 extern int smc_set_configuration(int cs, const struct smc_config *config);
58 extern struct smc_config *smc_get_configuration(int cs);
59
60 #endif /* __ARCH_AT32AP_SMC_H */