diff options
Diffstat (limited to 'include/asm-avr32/arch-at32ap/smc.h')
| -rw-r--r-- | include/asm-avr32/arch-at32ap/smc.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/asm-avr32/arch-at32ap/smc.h b/include/asm-avr32/arch-at32ap/smc.h new file mode 100644 index 0000000..3732b32 --- /dev/null +++ b/include/asm-avr32/arch-at32ap/smc.h @@ -0,0 +1,60 @@ +/* + * Static Memory Controller for AT32 chips + * + * Copyright (C) 2006 Atmel Corporation + * + * Inspired by the OMAP2 General-Purpose Memory Controller interface + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ARCH_AT32AP_SMC_H +#define __ARCH_AT32AP_SMC_H + +/* + * All timing parameters are in nanoseconds. + */ +struct smc_config { + /* Delay from address valid to assertion of given strobe */ + u16 ncs_read_setup; + u16 nrd_setup; + u16 ncs_write_setup; + u16 nwe_setup; + + /* Pulse length of given strobe */ + u16 ncs_read_pulse; + u16 nrd_pulse; + u16 ncs_write_pulse; + u16 nwe_pulse; + + /* Total cycle length of given operation */ + u16 read_cycle; + u16 write_cycle; + + /* Bus width in bytes */ + u8 bus_width; + + /* + * 0: Data is sampled on rising edge of NCS + * 1: Data is sampled on rising edge of NRD + */ + unsigned int nrd_controlled:1; + + /* + * 0: Data is driven on falling edge of NCS + * 1: Data is driven on falling edge of NWR + */ + unsigned int nwe_controlled:1; + + /* + * 0: Byte select access type + * 1: Byte write access type + */ + unsigned int byte_write:1; +}; + +extern int smc_set_configuration(int cs, const struct smc_config *config); +extern struct smc_config *smc_get_configuration(int cs); + +#endif /* __ARCH_AT32AP_SMC_H */ |