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[AVR32] Add nwait and tdf parameters to SMC configuration 

Complete the SMC configuration code by adding nwait and tdf
parameter. After this change, we support the same parameters as the
hardware.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Hans-Christian Egtvedt 2007-01-31 18:01:45 +01:00 committed by Haavard Skinnemoen
parent 9c8f8e7524
commit 068d9f6eb9
2 changed files with 45 additions and 0 deletions
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23
arch/avr32/mach-at32ap/hsmc.c
View File

@ -75,12 +75,35 @@ int smc_set_configuration(int cs, const struct smc_config *config)
return -EINVAL;
}
switch (config->nwait_mode) {
case 0:
mode |= HSMC_BF(EXNW_MODE, HSMC_EXNW_MODE_DISABLED);
break;
case 1:
mode |= HSMC_BF(EXNW_MODE, HSMC_EXNW_MODE_RESERVED);
break;
case 2:
mode |= HSMC_BF(EXNW_MODE, HSMC_EXNW_MODE_FROZEN);
break;
case 3:
mode |= HSMC_BF(EXNW_MODE, HSMC_EXNW_MODE_READY);
break;
default:
return -EINVAL;
}
if (config->tdf_cycles) {
mode |= HSMC_BF(TDF_CYCLES, config->tdf_cycles);
}
if (config->nrd_controlled)
mode |= HSMC_BIT(READ_MODE);
if (config->nwe_controlled)
mode |= HSMC_BIT(WRITE_MODE);
if (config->byte_write)
mode |= HSMC_BIT(BAT);
if (config->tdf_mode)
mode |= HSMC_BIT(TDF_MODE);
pr_debug("smc cs%d: setup/%08x pulse/%08x cycle/%08x mode/%08x\n",
cs, setup, pulse, cycle, mode);

22
include/asm-avr32/arch-at32ap/smc.h
View File

@ -47,11 +47,33 @@ struct smc_config {
*/
unsigned int nwe_controlled:1;
/*
* 0: NWAIT is disabled
* 1: Reserved
* 2: NWAIT is frozen mode
* 3: NWAIT in ready mode
*/
unsigned int nwait_mode:2;
/*
* 0: Byte select access type
* 1: Byte write access type
*/
unsigned int byte_write:1;
/*
* Number of clock cycles before data is released after
* the rising edge of the read controlling signal
*
* Total cycles from SMC is tdf_cycles + 1
*/
unsigned int tdf_cycles:4;
/*
* 0: TDF optimization disabled
* 1: TDF optimization enabled
*/
unsigned int tdf_mode:1;
};
extern int smc_set_configuration(int cs, const struct smc_config *config);