sys-clk.c File Reference

#include <io.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <types.h>
#include <timer.h>
#include <log.h>
#include <sys-clk.h>

Include dependency graph for sys-clk.c:

Classes
struct	pll_reg_config

Macros
#define	PLL_REG_CONF(x)    { x, (1 << x##_PLL_FREF_SEL_OFFSET) }
#define	CPU_PLL_FACTOR_N_24M(x)   (((x) + (24) - 1) / (24))
#define	CPU_PLL_FACTOR_N_26M(x)   (((x) + (26) - 1) / (26))

Functions
static void	set_pll_parent (void)
static void	enable_pll (uint32_t addr, uint32_t m0, uint32_t n, uint32_t m1, uint32_t p)
static void	set_pll (uint32_t addr, uint32_t m0, uint32_t n, uint32_t m1, uint32_t p)
static void	set_pll_cpux_axi (void)
static void	set_apb1 (void)
static void	set_pll_nsi (void)
void	sunxi_clk_init (void)
	Initialize the global clocks.
uint32_t	sunxi_clk_get_hosc_type ()
	Get the type of High-Speed Oscillator (HOSC).
void	sunxi_clk_reset (void)
	Reset the global clocks.
uint32_t	sunxi_clk_get_peri1x_rate ()
	Get the clock rate of the PERI1X bus.
static void	sunxi_cpu_clk_dump (uint32_t pll_addr, uint32_t ctl_addr, char *name, uint32_t clk_hosc)
static void	sunxi_peri_clk_dump (uint32_t addr, char *name, uint8_t pll_div)
void	sunxi_clk_dump (void)
	Dump all clock-related register values.

Variables
const struct pll_reg_config	pll_ctrl_regs []

Macro Definition Documentation

CPU_PLL_FACTOR_N_24M

#define CPU_PLL_FACTOR_N_24M

(

x

)

(((x) + (24) - 1) / (24))

CPU_PLL_FACTOR_N_26M

#define CPU_PLL_FACTOR_N_26M

(

x

)

(((x) + (26) - 1) / (26))

PLL_REG_CONF

#define PLL_REG_CONF

(

x

)

{ x, (1 << x##_PLL_FREF_SEL_OFFSET) }

Function Documentation

enable_pll()

static void enable_pll ( uint32_t  addr, uint32_t  m0, uint32_t  n, uint32_t  m1, uint32_t  p  )

inlinestatic

set_apb1()

static void set_apb1 ( void  )

inlinestatic

set_pll()

static void set_pll ( uint32_t  addr, uint32_t  m0, uint32_t  n, uint32_t  m1, uint32_t  p  )

inlinestatic

set_pll_cpux_axi()

static void set_pll_cpux_axi ( void  )

inlinestatic

set_pll_nsi()

static void set_pll_nsi ( void  )

inlinestatic

set_pll_parent()

static void set_pll_parent ( void  )

inlinestatic

sunxi_clk_dump()

void sunxi_clk_dump

(

void

)

Dump all clock-related register values.

This function prints out all clock-related register values for debugging and observation.

sunxi_clk_get_hosc_type()

uint32_t sunxi_clk_get_hosc_type

(

void

)

Get the type of High-Speed Oscillator (HOSC).

This function retrieves the type of the High-Speed Oscillator currently being used. The returned value can indicate different HOSC configurations or features supported by the system.

Returns

uint32_t Type of the HOSC.

sunxi_clk_get_peri1x_rate()

uint32_t sunxi_clk_get_peri1x_rate

(

)

Get the clock rate of the PERI1X bus.

Returns

The clock rate of the PERI1X bus in Hz.

sunxi_clk_init()

void sunxi_clk_init

(

void

)

Initialize the global clocks.

This function initializes the global clocks, including PLLs and clock dividers.

Initialize the global clocks.

This function configures various clock sources for the CPU, AXI, APB, NSI, and MBUS based on the Sunxi platform's requirements. The function also prints debug messages to track the initialization process.

It performs the following tasks:

• Configures the CPU and AXI clock using the set_pll_cpux_axi() function.
• Configures the APB clock using the set_apb() function.
• Configures the NSI clock using the set_pll_nsi() function.
• Configures the MBUS clock using the set_pll_mbus() function.

Note

This function should be called during the system initialization process to ensure the correct operation of the platform's clock system.

Warning

Ensure that all the clock configuration functions are correctly implemented and tested to avoid system instability.

sunxi_clk_reset()

void sunxi_clk_reset

(

void

)

Reset the global clocks.

This function resets all global clocks to their default values.

sunxi_cpu_clk_dump()

static void sunxi_cpu_clk_dump ( uint32_t  pll_addr, uint32_t  ctl_addr, char *  name, uint32_t  clk_hosc  )

inlinestatic

sunxi_peri_clk_dump()

static void sunxi_peri_clk_dump ( uint32_t  addr, char *  name, uint8_t  pll_div  )

inlinestatic

Variable Documentation

pll_ctrl_regs

const struct pll_reg_config pll_ctrl_regs[]

Initial value:

= {
        PLL_REG_CONF(PLL_DDR_CTRL_REG),
        PLL_REG_CONF(PLL_PERI0_CTRL_REG),
        PLL_REG_CONF(PLL_PERI1_CTRL_REG),
        PLL_REG_CONF(PLL_GPU0_CTRL_REG),
        PLL_REG_CONF(PLL_VIDEO0_CTRL_REG),
        PLL_REG_CONF(PLL_VIDEO1_CTRL_REG),
        PLL_REG_CONF(PLL_VIDEO2_CTRL_REG),
        PLL_REG_CONF(PLL_VE0_CTRL_REG),
        PLL_REG_CONF(PLL_VE1_CTRL_REG),
        PLL_REG_CONF(PLL_AUDIO0_CTRL_REG),
        PLL_REG_CONF(PLL_AUDIO1_CTRL_REG),
        PLL_REG_CONF(PLL_NPU_CTRL_REG),
        PLL_REG_CONF(PLL_DE_CTRL_REG),
}