From af8184718a322ae589efa583aa69ffdae61bf266 Mon Sep 17 00:00:00 2001 From: Kristoffer Nyborg Gregertsen Date: Fri, 17 Aug 2007 16:59:57 +0200 Subject: [AVR32] SMC configuration in clock cycles This patch makes the SMC configuration take timings in clock cycles instead of nanoseconds. A function to calculate timings in clock cycles is added. This patch removes the rounding troubles of the previous SMC configuration method. [hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config] Signed-off-by: Kristoffer Nyborg Gregertsen Signed-off-by: Haavard Skinnemoen --- include/asm-avr32/arch-at32ap/smc.h | 51 +++++++++++++++++++++++++++++-------- 1 file changed, 41 insertions(+), 10 deletions(-) (limited to 'include/asm-avr32') diff --git a/include/asm-avr32/arch-at32ap/smc.h b/include/asm-avr32/arch-at32ap/smc.h index 07152b7fd9c..c98eea44a70 100644 --- a/include/asm-avr32/arch-at32ap/smc.h +++ b/include/asm-avr32/arch-at32ap/smc.h @@ -15,22 +15,50 @@ /* * All timing parameters are in nanoseconds. */ +struct smc_timing { + /* Delay from address valid to assertion of given strobe */ + int ncs_read_setup; + int nrd_setup; + int ncs_write_setup; + int nwe_setup; + + /* Pulse length of given strobe */ + int ncs_read_pulse; + int nrd_pulse; + int ncs_write_pulse; + int nwe_pulse; + + /* Total cycle length of given operation */ + int read_cycle; + int write_cycle; + + /* Minimal recovery times, will extend cycle if needed */ + int ncs_read_recover; + int nrd_recover; + int ncs_write_recover; + int nwe_recover; +}; + +/* + * All timing parameters are in clock cycles. + */ 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; + u8 ncs_read_setup; + u8 nrd_setup; + u8 ncs_write_setup; + u8 nwe_setup; /* Pulse length of given strobe */ - u16 ncs_read_pulse; - u16 nrd_pulse; - u16 ncs_write_pulse; - u16 nwe_pulse; + u8 ncs_read_pulse; + u8 nrd_pulse; + u8 ncs_write_pulse; + u8 nwe_pulse; /* Total cycle length of given operation */ - u16 read_cycle; - u16 write_cycle; + u8 read_cycle; + u8 write_cycle; /* Bus width in bytes */ u8 bus_width; @@ -76,6 +104,9 @@ struct smc_config { unsigned int tdf_mode:1; }; +extern void smc_set_timing(struct smc_config *config, + const struct smc_timing *timing); + extern int smc_set_configuration(int cs, const struct smc_config *config); extern struct smc_config *smc_get_configuration(int cs); -- cgit v1.2.3-70-g09d2