diff options
Diffstat (limited to 'firmware/target')
| -rw-r--r-- | firmware/target/arm/pp/ata-target.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/firmware/target/arm/pp/ata-target.h b/firmware/target/arm/pp/ata-target.h index 75570bf3cd..ddf4056db9 100644 --- a/firmware/target/arm/pp/ata-target.h +++ b/firmware/target/arm/pp/ata-target.h @@ -63,13 +63,15 @@ /* Maximum multi-word DMA mode supported by the controller */ #define ATA_MAX_MWDMA 2 -#ifndef BOOTLOADER +#ifndef BOOTLOADER /* The PP5020 supports UDMA 4, but it needs cpu boosting and only * improves performance by ~10% with a stock disk. * UDMA 2 is stable at 30 Mhz. * UDMA 1 is stable at 24 Mhz. + * + * A slower mode is used on iPod 4Gs due to reported instabilities. */ -#if CPUFREQ_NORMAL >= 30000000 +#if CPUFREQ_NORMAL >= 30000000 && !defined(IPOD_4G) #define ATA_MAX_UDMA 2 #elif CPUFREQ_NORMAL >= 24000000 #define ATA_MAX_UDMA 1 |