From 6f0320a9535bc1aa81d83fa879ac14d5ee603658 Mon Sep 17 00:00:00 2001 From: William Wilgus Date: Fri, 27 Jul 2018 23:56:32 +0200 Subject: As3525 v1/v2 Add power savings menu Allow user to select cpu undervolt There have been quite a few issues across the SANSA AMS line related to CPU undervolting while most players show greatly increased runtime some crash. Rather than constanly upping the voltage we now have a setting with a safe value for all players and the option for lower voltages I plan to add a few other options here later such as disk timings and maybe some other clocks/experimental settings Added: Disk Low speed option for AS3525v2 devices cuts frequency to 12 MHz from 24 MHz Added: Disk Low speed option for AS3525v1 devices cuts frequency to 15.5 MHz from 31 MHz Added: I2c Low Speed AS3525 devices, should be bigger improvement for v1 devices Fixed: Debug menu for AS3525v2 No SDSLOT frequency, Showed IDE freq though it is unused Added: DBOP and SSP underclocking affects display on v1/v2 respectively Fixed: debug menu now has SSP frequency, and SSP_CPSR Update: made settings menu more generic Update: cleaned up code Added: Clip v1 & Fuze v1 didn't have HAVE_ADJUSTABLE_CPU_VOLTAGE. not sure why but, waiting on testing to confirm Added: C200v2 and E200v2 devices and HAVE_ADJUSTABLE_CPU_VOLTAGE. Fixed: v1 devices don't like display timing set lower (dbop) v1 devices don't have a divider set for ssp (causes divide by 0) Fixed: ClipZip display lags with Max SSP divider changed from 0xFE to 0x32 Fixed: v1 devices didn't work properly with highspeed sd cards Added code from http://gerrit.rockbox.org/r/#/c/1704/ Added powersave and IDE interface enable/disable Added: V2 devices now have powersave enabled on sd interface Update: cleaned up code, lang defines, added manual entries Update ssp clock mechanism added calculated ssp divider to clipzip Update turn display clock off when clip+ turns off display Fixed: clipzip wrong register for SSP clock Change-Id: I04137682243be92f0f8d8bf1cfa54fbb1965559b TODO: add other players? --- firmware/target/arm/as3525/sd-as3525v2.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) (limited to 'firmware/target/arm/as3525/sd-as3525v2.c') diff --git a/firmware/target/arm/as3525/sd-as3525v2.c b/firmware/target/arm/as3525/sd-as3525v2.c index b512cc2ea4..d27df5289c 100644 --- a/firmware/target/arm/as3525/sd-as3525v2.c +++ b/firmware/target/arm/as3525/sd-as3525v2.c @@ -488,7 +488,7 @@ static int sd_init_card(const int drive) card_info[drive].initialized = 0; card_info[drive].rca = 0; - /* assume 24 MHz clock / 60 = 400 kHz */ + /* assume 24 MHz clock / (2x)60 = 200 kHz */ MCI_CLKDIV = (MCI_CLKDIV & ~(0xFF)) | 0x3C; /* CLK_DIV_0 : bits 7:0 */ /* 100 - 400kHz clock required for Identification Mode */ @@ -957,3 +957,27 @@ int sd_event(long id, intptr_t data) return rc; } + +#if defined(CONFIG_POWER_SAVING) && (CONFIG_POWER_SAVING & POWERSV_DISK) +/* declared in system-as3525.c */ +void ams_sd_set_low_speed(bool slow) +{ + /* block access while speed is changed */ + mutex_lock(&sd_mtx); + enable_controller(true); + if (slow) + { + CGU_SDSLOT = (CGU_SDSLOT & ~(0xF << 2)) | (AS3525_SDSLOT_DIV_MAX << 2); + /* power save is enabled for the sd card(s) ASSUMES CRD0 is int drive! */ + MCI_CLKENA |= (CCLK_LP_CRD1 | CCLK_LP_CRD2 | CCLK_LP_CRD3); + } + else + { + /* Full Speed */ + CGU_SDSLOT = (CGU_SDSLOT & ~(0xF << 2)) | (AS3525_SDSLOT_DIV << 2); + MCI_CLKENA = (MCI_CLKENA & ~(CCLK_LP_CRD1 | CCLK_LP_CRD2 | CCLK_LP_CRD3)); + } + enable_controller(false); + mutex_unlock(&sd_mtx); +} +#endif -- cgit v1.2.3