FS#11765: Improve AMSv1 Battery Life by Lowering CPU and Peripheral clocks. Unboosted CPU and peripheral clock is now 31MHz. Boosted CPU and pclk are 186MHz and 62MHz, respectively.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28834 a1c6a512-1295-4272-9138-f99709370657

4 files changed, 94 insertions, 16 deletions

diff --git a/firmware/target/arm/as3525/clock-target.h b/firmware/target/arm/as3525/clock-target.h
index 97d6edb3d1..135164b25b 100644
--- a/firmware/target/arm/as3525/clock-target.h
+++ b/firmware/target/arm/as3525/clock-target.h
@@ -114,17 +114,19 @@
                       /* *5/8 = 240MHz      120, 80, 60, 48, 40  */
 //#define AS3525_PLLA_SETTING     0x2630
 
-#define AS3525_FCLK_PREDIV    0 /* div = (8-n)/8 Enter manually & postdiv will be calculated*/
+#define AS3525_FCLK_PREDIV    2 /* div = (8-n)/8 Enter manually & postdiv will be calculated*/
                                 /* 0 gives you the PLLA 1st line choices, 1 the 2nd line etc. */
 
-#define AS3525_FCLK_FREQ      248000000            /* Boosted FCLK frequency  */
-#define AS3525_DRAM_FREQ       62000000            /* Initial DRAM frequency  */
+#define AS3525_FCLK_FREQ      186000000   /* Boosted FCLK frequency - over 200MHz */
+                                          /* requires CVDDp bumped to 1.2V        */
+#define AS3525_DRAM_FREQ       31000000            /* Initial DRAM frequency  */
+#define AS3525_DRAM_FREQ_BOOSTED 62000000
 /* AS3525_PCLK_FREQ != AS3525_DRAM_FREQ/1 will boot to white lcd screen */
 
 #endif  /* CONFIG_CPU == AS3525v2 */
 
 #define AS3525_PCLK_FREQ      (AS3525_DRAM_FREQ/1)   /* PCLK divided from DRAM freq */
-
+#define AS3525_PCLK_FREQ_BOOSTED (AS3525_DRAM_FREQ_BOOSTED/1)
 #define AS3525_DBOP_FREQ      (AS3525_PCLK_FREQ/1)   /* DBOP divided from PCLK freq */
 
 /** ****************************************************************************/
@@ -169,6 +171,9 @@
          /*unable to use AS3525_PCLK_DIV1 != 0 successfuly so far*/
 #define AS3525_PCLK_DIV1         (CLK_DIV(AS3525_DRAM_FREQ, AS3525_PCLK_FREQ) - 1)/* div = 1/(n+1)*/ 
 #define AS3525_PCLK_DIV0         (CLK_DIV(AS3525_PLLA_FREQ, AS3525_DRAM_FREQ) - 1) /*div=1/(n+1)*/
+#define AS3525_PCLK_DIV1_BOOSTED (CLK_DIV(AS3525_DRAM_FREQ_BOOSTED, AS3525_PCLK_FREQ_BOOSTED) - 1)
+#define AS3525_PCLK_DIV0_BOOSTED (CLK_DIV(AS3525_PLLA_FREQ, AS3525_PCLK_FREQ_BOOSTED) - 1)
+
 #else
 
 #define AS3525_PCLK_SEL          AS3525_CLK_FCLK
@@ -179,8 +184,10 @@
    /* PCLK as Source */
   #define AS3525_DBOP_DIV        (CLK_DIV(AS3525_PCLK_FREQ, AS3525_DBOP_FREQ) - 1) /*div=1/(n+1)*/
   #define AS3525_I2C_PRESCALER   CLK_DIV(AS3525_PCLK_FREQ, AS3525_I2C_FREQ)
+  #define AS3525_I2C_PRESCALER_BOOSTED   CLK_DIV(AS3525_PCLK_FREQ_BOOSTED, AS3525_I2C_FREQ)
   #define AS3525_I2C_FREQ        400000
   #define AS3525_SD_IDENT_DIV    ((CLK_DIV(AS3525_PCLK_FREQ, AS3525_SD_IDENT_FREQ) / 2) - 1)
+  #define AS3525_SD_IDENT_DIV_BOOSTED    ((CLK_DIV(AS3525_PCLK_FREQ_BOOSTED, AS3525_SD_IDENT_FREQ) / 2) - 1)
   #define AS3525_SD_IDENT_FREQ   400000      /* must be between 100 & 400 kHz */
   #define AS3525_SSP_PRESCALER   ((CLK_DIV(AS3525_PCLK_FREQ, AS3525_SSP_FREQ) + 1) & ~1)    /* must be an even number */
   #define AS3525_SSP_FREQ        12000000
diff --git a/firmware/target/arm/as3525/debug-as3525.c b/firmware/target/arm/as3525/debug-as3525.c
index 513295edcb..9950ccd9c6 100644
--- a/firmware/target/arm/as3525/debug-as3525.c
+++ b/firmware/target/arm/as3525/debug-as3525.c
@@ -182,7 +182,12 @@ static int calc_freq(int clk)
                     return 0;
             }
         case CLK_I2C:
-            return calc_freq(CLK_PCLK)/AS3525_I2C_PRESCALER;
+#if CONFIG_CPU == AS3525
+            if (cpu_frequency == CPUFREQ_MAX)
+                return calc_freq(CLK_PCLK)/AS3525_I2C_PRESCALER_BOOSTED;
+            else
+#endif
+                return calc_freq(CLK_PCLK)/AS3525_I2C_PRESCALER;
         case CLK_I2SI:
             switch((CGU_AUDIO>>12) & 3) {
                 case 0:
@@ -218,7 +223,7 @@ static int calc_freq(int clk)
         case CLK_SD_MCLK_MSD:
             if(!(MCI_SD & (1<<8)))
                 return 0;
-            else if(MCI_SD & (1<<10))
+            else if(MCI_SD & (1<<10)) /* bypass */
                 return calc_freq(CLK_PCLK);
             else
             return calc_freq(CLK_PCLK)/(((MCI_SD & 0xff)+1)*2);
@@ -347,7 +352,7 @@ bool __dbg_hw_info(void)
             calc_freq(CLK_SD_MCLK_NAND)/1000000);
 #ifdef HAVE_MULTIDRIVE
         lcd_putsf(0, line++, "uSD :%3dMHz    %3dMHz",
-            ((AS3525_PCLK_FREQ/ 1000000) /
+            ((calc_freq(CLK_PCLK)/ 1000000) /
             ((last_sd & MCI_CLOCK_BYPASS) ? 1: (((last_sd & 0xff) + 1) * 2))),
             calc_freq(CLK_SD_MCLK_MSD)/1000000);
 #endif
diff --git a/firmware/target/arm/as3525/sd-as3525.c b/firmware/target/arm/as3525/sd-as3525.c
index 0dc29c8aa5..6f11145ee6 100644
--- a/firmware/target/arm/as3525/sd-as3525.c
+++ b/firmware/target/arm/as3525/sd-as3525.c
@@ -116,9 +116,8 @@ static void init_pl180_controller(const int drive);
 static tCardInfo card_info[NUM_DRIVES];
 
 /* maximum timeouts recommanded in the SD Specification v2.00 */
-#define SD_MAX_READ_TIMEOUT     ((AS3525_PCLK_FREQ) / 1000 * 100) /* 100 ms */
-#define SD_MAX_WRITE_TIMEOUT    ((AS3525_PCLK_FREQ) / 1000 * 250) /* 250 ms */
-
+#define SD_MAX_READ_TIMEOUT     ((AS3525_PCLK_FREQ*(cpu_frequency==CPUFREQ_MAX?2:1)) / 1000 * 100) /* 100 ms */
+#define SD_MAX_WRITE_TIMEOUT    ((AS3525_PCLK_FREQ*(cpu_frequency==CPUFREQ_MAX?2:1)) / 1000 * 250) /* 250 ms */
 /* for compatibility */
 static long last_disk_activity = -1;
 
@@ -140,6 +139,8 @@ static struct wakeup transfer_completion_signal;
 static volatile unsigned int transfer_error[NUM_VOLUMES];
 #define PL180_MAX_TRANSFER_ERRORS 10
 
+extern long cpu_frequency;
+
 #define UNALIGNED_NUM_SECTORS 10
 static unsigned char aligned_buffer[UNALIGNED_NUM_SECTORS* SD_BLOCK_SIZE] __attribute__((aligned(32)));   /* align on cache line size */
 static unsigned char *uncached_buffer = AS3525_UNCACHED_ADDR(&aligned_buffer[0]);
@@ -283,7 +284,7 @@ static bool send_cmd(const int drive, const int cmd, const int arg,
 #define MCI_HALFSPEED     (MCI_CLOCK_ENABLE)                        /* MCLK/2 */
 #define MCI_QUARTERSPEED  (MCI_CLOCK_ENABLE | 1)                    /* MCLK/4 */
 #define MCI_IDENTSPEED    (MCI_CLOCK_ENABLE | AS3525_SD_IDENT_DIV)  /* IDENT  */
-
+#define MCI_IDENTSPEED_BOOSTED    (MCI_CLOCK_ENABLE | AS3525_SD_IDENT_DIV_BOOSTED)
 static int sd_init_card(const int drive)
 {
     unsigned long response;
@@ -293,7 +294,10 @@ static int sd_init_card(const int drive)
     card_info[drive].rca = 0;
 
     /* MCLCK on and set to 400kHz ident frequency  */
-    MCI_CLOCK(drive) = MCI_IDENTSPEED;
+    if (cpu_frequency == CPUFREQ_MAX)
+        MCI_CLOCK(drive) = MCI_IDENTSPEED_BOOSTED;
+    else
+        MCI_CLOCK(drive) = MCI_IDENTSPEED;
 
     /* 100 - 400kHz clock required for Identification Mode  */
     /*  Start of Card Identification Mode ************************************/
@@ -375,8 +379,12 @@ static int sd_init_card(const int drive)
         MCI_CLOCK(drive) = MCI_HALFSPEED;  /* MCICLK = IDE_CLK/2 = 25 MHz  */
 #if defined(HAVE_MULTIDRIVE)
     else
-        /* MCICLK = PCLK/2 = 31MHz(HS) or PCLK/4 = 15.5 Mhz (STD)*/
-        MCI_CLOCK(drive) = (hs_card ? MCI_HALFSPEED : MCI_QUARTERSPEED);
+    {   /* PCLK = 31Mhz (62 boosted) MCI = 31Mhz(hs) or 15.5 */
+        if (cpu_frequency == CPUFREQ_MAX )
+            MCI_CLOCK(drive) = (hs_card ? MCI_HALFSPEED : MCI_QUARTERSPEED);
+        else
+            MCI_CLOCK(drive) = (hs_card ? MCI_FULLSPEED : MCI_HALFSPEED);
+    }
 #endif
 
     /*  CMD7 w/rca: Select card to put it in TRAN state */
@@ -523,6 +531,26 @@ static void sd_thread(void)
     }
 }
 
+#ifdef HAVE_MULTIDRIVE
+void sd_set_boosted_divider(void)
+{
+    if ( !sd_enabled )
+        return;   
+    /* 62Mhz/2 - 62/4 */
+    MCI_CLOCK(SD_SLOT_AS3525) = (hs_card ?
+    MCI_HALFSPEED : MCI_QUARTERSPEED);
+}
+
+void sd_set_unboosted_divider(void)
+{
+    if ( !sd_enabled )
+        return;
+    /* 31Mhz/1 - 31/2 */
+    MCI_CLOCK(SD_SLOT_AS3525) = (hs_card ?
+    MCI_FULLSPEED : MCI_HALFSPEED);    
+}
+#endif
+
 static void init_pl180_controller(const int drive)
 {
     MCI_COMMAND(drive) = MCI_DATA_CTRL(drive) = 0;
diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index d8059715d0..2c4543fa33 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -33,6 +33,12 @@
 #include "backlight-target.h"
 #include "lcd.h"
 
+/* FIXME */
+#define I2C2_CPSR0      *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x1C))
+#define I2C2_CPSR1      *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x20))
+extern void sd_set_boosted_divider(void);
+extern void sd_set_unboosted_divider(void);
+
 #define default_interrupt(name) \
   extern __attribute__((weak,alias("UIRQ"))) void name (void)
 
@@ -286,7 +292,12 @@ void system_init(void)
 #endif
 
     /*  Initialize power management settings */
+#if CONFIG_CPU == AS3525
+    ascodec_write(AS3514_CVDD_DCDC3, AS314_CP_DCDC3_SETTING|CVDD_1_10);
+#else
     ascodec_write(AS3514_CVDD_DCDC3, AS314_CP_DCDC3_SETTING);
+#endif
+
 #if CONFIG_TUNER
     fmradio_i2c_init();
 #endif
@@ -354,7 +365,9 @@ void set_cpu_frequency(long frequency)
 {
     if(frequency == CPUFREQ_MAX)
     {
-#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
+#if defined(HAVE_ADJUSTABLE_CPU_VOLTAGE) && (CPUFREQ_MAX > 200000000)
+        /* This doesn't work anymore. It was written before ascodec
+           was switched to use interrupts */
         /* Increasing frequency so boost voltage before change */
         ascodec_write(AS3514_CVDD_DCDC3, (AS314_CP_DCDC3_SETTING | CVDD_1_20));
 
@@ -374,10 +387,35 @@ void set_cpu_frequency(long frequency)
             "mcr p15, 0, r0, c1, c0  \n"
             : : : "r0" );
 
+#ifdef HAVE_MULTIDRIVE
+        /*  Set uSD frequency */
+        sd_set_boosted_divider();
+#endif
+        /*  Set I2C frequency */
+        I2C2_CPSR0 = AS3525_I2C_PRESCALER_BOOSTED & 0xFF;          /* 8 lsb */
+        I2C2_CPSR1 = (AS3525_I2C_PRESCALER_BOOSTED >> 8) & 0x3;    /* 2 msb */
+        /*  Set PCLK frequency */
+        CGU_PERI = ((CGU_PERI & ~0x7F)  |       /* reset divider & clksel bits */
+                 (AS3525_PCLK_DIV0_BOOSTED << 2) |
+                 (AS3525_PCLK_DIV1_BOOSTED << 6) |
+                  AS3525_PCLK_SEL);
         cpu_frequency = CPUFREQ_MAX;
     }
     else
     {
+        /*  Set I2C frequency */
+        I2C2_CPSR0 = AS3525_I2C_PRESCALER & 0xFF;          /* 8 lsb */
+        I2C2_CPSR1 = (AS3525_I2C_PRESCALER >> 8) & 0x3;    /* 2 msb */
+        /*  Set PCLK frequency */
+        CGU_PERI = ((CGU_PERI & ~0x7F)  |       /* reset divider & clksel bits */
+                 (AS3525_PCLK_DIV0 << 2) |
+                 (AS3525_PCLK_DIV1 << 6) |
+                  AS3525_PCLK_SEL);
+
+#ifdef HAVE_MULTIDRIVE
+        /*  Set uSD frequency */
+        sd_set_unboosted_divider();
+#endif
         asm volatile(
             "mrc p15, 0, r0, c1, c0  \n"
             "bic r0, r0, #3<<30      \n"     /* fastbus clocking */
@@ -387,7 +425,7 @@ void set_cpu_frequency(long frequency)
         /* FCLK is unused so put it to the lowest freq we can */
         CGU_PROC = ((0xf << 4) | (0x3 << 2) | AS3525_CLK_MAIN);
 
-#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
+#if defined(HAVE_ADJUSTABLE_CPU_VOLTAGE) && (CPUFREQ_MAX > 200000000)
         /* Decreasing frequency so reduce voltage after change */
         ascodec_write(AS3514_CVDD_DCDC3, (AS314_CP_DCDC3_SETTING | CVDD_1_10));
 #endif  /*  HAVE_ADJUSTABLE_CPU_VOLTAGE */