iPod Classic: s5l8702 clocking rewrite+documentation

This is a rewrite of the clocking section, the resulting system
frequencies are the same as the current git version.

This pàtch uses fixed FClk and just one register is written to switch
all system frequencies, it needs less steps than the current git
version to reach the desired frequency, so it is faster and safer.
Includes functions to step-up/down over a table of predefined set of
frequencies.

The major difference is that Vcore is decreased from 1050 to 1000 mV.

See clocking-s5l8702.h for more information.

Change-Id: I58ac6634e1996adbe1c0c0918a7ce94ad1917d8e

1 files changed, 75 insertions, 33 deletions

diff --git a/firmware/export/s5l8702.h b/firmware/export/s5l8702.h
index 1a59d47036..6ec59eaf37 100644
--- a/firmware/export/s5l8702.h
+++ b/firmware/export/s5l8702.h
@@ -39,6 +39,12 @@
 #define TTB_SIZE                  0x4000
 #define TTB_BASE_ADDR             (DRAM_ORIG + DRAM_SIZE - TTB_SIZE)
 
+#define IRAM0_ORIG      0x22000000
+#define IRAM0_SIZE      0x20000
+#define IRAM1_ORIG      0x22020000
+#define IRAM1_SIZE      0x20000
+
+
 /////SYSTEM CONTROLLER/////
 #define CLKCON0      (*((volatile uint32_t*)(0x3C500000)))
 #define CLKCON1      (*((volatile uint32_t*)(0x3C500004)))
@@ -151,6 +157,9 @@
 
 
 /////I2C/////
+#define I2CCLKGATE(i)   ((i) == 1 ? CLOCKGATE_I2C1 : \
+                                    CLOCKGATE_I2C0)
+
 #define IICCON(bus)  (*((uint32_t volatile*)(0x3C600000 + 0x300000 * (bus))))
 #define IICSTAT(bus) (*((uint32_t volatile*)(0x3C600004 + 0x300000 * (bus))))
 #define IICADD(bus)  (*((uint32_t volatile*)(0x3C600008 + 0x300000 * (bus))))
@@ -374,9 +383,9 @@
 #define SPIBASE(i)      ((i) == 2 ? 0x3d200000 : \
                          (i) == 1 ? 0x3ce00000 : \
                                     0x3c300000)
-#define SPICLKGATE(i)   ((i) == 2 ? 0x2f : \
-                         (i) == 1 ? 0x2b : \
-                                    0x22)
+#define SPICLKGATE(i)   ((i) == 2 ? CLOCKGATE_SPI2 : \
+                         (i) == 1 ? CLOCKGATE_SPI1 : \
+                                    CLOCKGATE_SPI0)
 #define SPIDMA(i)       ((i) == 2 ? 0xd : \
                          (i) == 1 ? 0xf : \
                                     0x5)
@@ -658,6 +667,10 @@
 
 
 /////I2S/////
+#define I2SCLKGATE(i)   ((i) == 2 ? CLOCKGATE_I2S2 : \
+                         (i) == 1 ? CLOCKGATE_I2S1 : \
+                                    CLOCKGATE_I2S0)
+
 #define I2SCLKCON           (*((volatile uint32_t*)(0x3CA00000)))
 #define I2STXCON            (*((volatile uint32_t*)(0x3CA00004)))
 #define I2STXCOM            (*((volatile uint32_t*)(0x3CA00008)))
@@ -676,38 +689,67 @@
 
 
 /////CLOCK GATES/////
-#define CLOCKGATE_USB_1 2
-#define CLOCKGATE_USB_2 35
-#define CLOCKGATE_DMAC0 25
-#define CLOCKGATE_DMAC1 26
-#define CLOCKGATE_UART  41
+#define CLOCKGATE_SHA       0
+#define CLOCKGATE_LCD       1
+#define CLOCKGATE_USBOTG    2
+#define CLOCKGATE_SMx       3
+#define CLOCKGATE_SM1       4
+#define CLOCKGATE_ATA       5
+#define CLOCKGATE_SDCI      9
+#define CLOCKGATE_AES       10
+#define CLOCKGATE_DMAC0     25
+#define CLOCKGATE_DMAC1     26
+#define CLOCKGATE_ROM       30
+
+#define CLOCKGATE_RTC       32
+#define CLOCKGATE_CWHEEL    33
+#define CLOCKGATE_SPI0      34
+#define CLOCKGATE_USBPHY    35
+#define CLOCKGATE_I2C0      36
+#define CLOCKGATE_TIMER     37
+#define CLOCKGATE_I2C1      38
+#define CLOCKGATE_I2S0      39
+#define CLOCKGATE_UART      41
+#define CLOCKGATE_I2S1      42
+#define CLOCKGATE_SPI1      43
+#define CLOCKGATE_GPIO      44
+#define CLOCKGATE_CHIPID    46
+#define CLOCKGATE_I2S2      47
+#define CLOCKGATE_SPI2      48
 
 
 /////INTERRUPTS/////
-#define IRQ_TIMER32 7
-#define IRQ_TIMER 8
-#define IRQ_USB_FUNC 19
-#define IRQ_DMAC(d) 16 + d
-#define IRQ_DMAC0 16
-#define IRQ_DMAC1 17
-#define IRQ_WHEEL 23
-#define IRQ_ATA 29
-#define IRQ_MMC 44
-
-#define IRQ_UART(i) (24+i)
-#define IRQ_UART0 24
-#define IRQ_UART1 25
-#define IRQ_UART2 26
-#define IRQ_UART3 27
-#define IRQ_UART4 28    /* obsolete/not implemented on s5l8702 ??? */
-
-#define IRQ_EXT0    0
-#define IRQ_EXT1    1
-#define IRQ_EXT2    2
-#define IRQ_EXT3    3
-#define IRQ_EXT4    31
-#define IRQ_EXT5    32
-#define IRQ_EXT6    33
+#define IRQ_TIMER32     7
+#define IRQ_TIMER       8
+#define IRQ_SPI(i)      (9+i) /* TBC */
+#define IRQ_SPI0        9
+#define IRQ_SPI1        10
+#define IRQ_SPI2        11
+#define IRQ_LCD         14
+#define IRQ_DMAC(d)     (16+d)
+#define IRQ_DMAC0       16
+#define IRQ_DMAC1       17
+#define IRQ_USB_FUNC    19
+#define IRQ_I2C         21    /* TBC */
+#define IRQ_WHEEL       23
+#define IRQ_UART(i)     (24+i)
+#define IRQ_UART0       24
+#define IRQ_UART1       25
+#define IRQ_UART2       26
+#define IRQ_UART3       27
+#define IRQ_UART4       28    /* obsolete/not implemented on s5l8702 ??? */
+#define IRQ_ATA         29
+#define IRQ_SBOOT       36
+#define IRQ_AES         39
+#define IRQ_SHA         40
+#define IRQ_MMC         44
+
+#define IRQ_EXT0        0
+#define IRQ_EXT1        1
+#define IRQ_EXT2        2
+#define IRQ_EXT3        3
+#define IRQ_EXT4        31
+#define IRQ_EXT5        32
+#define IRQ_EXT6        33
 
 #endif
-