diff options
| author |   Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com> | 2007-08-17 16:59:57 +0200 |
|---|---|---|
| committer |   Haavard Skinnemoen <hskinnemoen@atmel.com> | 2007-10-11 13:32:49 +0200 |
| commit | af8184718a322ae589efa583aa69ffdae61bf266 (patch) | |
| tree | 7324ba9e6a14e78b89b703bea7d0594a0ae9ef6e /include/asm-avr32 | |
| parent | [AVR32] Drop support for redundant "keepinitrd" boot-time parm. (diff) | |
| download | linux-dev-af8184718a322ae589efa583aa69ffdae61bf266.tar.xz linux-dev-af8184718a322ae589efa583aa69ffdae61bf266.zip | |
[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 <gregerts@stud.ntnu.no>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32')
| -rw-r--r-- | include/asm-avr32/arch-at32ap/smc.h | 51 |
1 files changed, 41 insertions, 10 deletions
diff --git a/include/asm-avr32/arch-at32ap/smc.h b/include/asm-avr32/arch-at32ap/smc.h index 07152b7fd9c9..c98eea44a70a 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); |