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As3525 v1/v2 Add power savings menu

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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?
This commit is contained in:
William Wilgus 2018-07-27 23:56:32 +02:00
parent 400603abdf
commit 6f0320a953
23 changed files with 537 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

23
firmware/target/arm/as3525/sansa-clipplus/lcd-clip-plus.c
View file

@ -26,11 +26,25 @@
#include "system.h"
#include "cpu.h"
static void ssp_set_prescaler(unsigned int prescaler)
{
int oldlevel = disable_interrupt_save(IRQ_FIQ_STATUS);
/* must be on to write regs */
bool ssp_enabled = bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE) &
CGU_SSP_CLOCK_ENABLE;
SSP_CPSR = prescaler;
if (!ssp_enabled) /* put it back how we found it */
bitclr32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
restore_irq(oldlevel);
}
int lcd_hw_init(void)
{
bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
SSP_CPSR = AS3525_SSP_PRESCALER; /* OF = 0x10 */
ssp_set_prescaler(AS3525_SSP_PRESCALER); /* OF = 0x10 */
SSP_CR0 = (1<<7) | (1<<6) | 7; /* Motorola SPI frame format, 8 bits */
SSP_CR1 = (1<<3) | (1<<1); /* SSP Operation enabled */
SSP_IMSC = 0; /* No interrupts */
@ -115,3 +129,10 @@ void lcd_enable_power(bool onoff)
#endif
}
#if defined(CONFIG_POWER_SAVING) && (CONFIG_POWER_SAVING & POWERSV_DISP)
/* declared in system-as3525.c */
void ams_ssp_set_low_speed(bool slow)
{
ssp_set_prescaler(slow ? AS3525_SSP_PRESCALER_MAX : AS3525_SSP_PRESCALER);
}
#endif