sifive.c File Reference

#include <device/mmio.h>
#include <boot/coreboot_tables.h>
#include <console/uart.h>
#include <types.h>

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Data Structures
struct	sifive_uart_registers

Macros
#define	TXDATA_FULL   BIT(31)
#define	RXDATA_EMPTY   BIT(31)
#define	TXCTRL_TXEN   BIT(0)
#define	TXCTRL_NSTOP_SHIFT   1
#define	TXCTRL_NSTOP(x)   (((x)-1) << TXCTRL_NSTOP_SHIFT)
#define	TXCTRL_TXCNT_SHIFT   16
#define	TXCTRL_TXCNT(x)   ((x) << TXCTRL_TXCNT_SHIFT)
#define	RXCTRL_RXEN   BIT(0)
#define	RXCTRL_RXCNT_SHIFT   16
#define	RXCTRL_RXCNT(x)   ((x) << RXCTRL_RXCNT_SHIFT)
#define	IP_TXWM   BIT(0)
#define	IP_RXWM   BIT(1)

Functions
static void	sifive_uart_init (struct sifive_uart_registers *regs, int div)
void	uart_init (unsigned int idx)
static bool	uart_can_tx (struct sifive_uart_registers *regs)
void	uart_tx_byte (unsigned int idx, unsigned char data)
void	uart_tx_flush (unsigned int idx)
unsigned char	uart_rx_byte (unsigned int idx)
unsigned int	uart_input_clock_divider (void)
void	uart_fill_lb (void *data)

Variables
struct sifive_uart_registers	__packed

Macro Definition Documentation

IP_RXWM

#define IP_RXWM   BIT(1)

Definition at line 34 of file sifive.c.

IP_TXWM

#define IP_TXWM   BIT(0)

Definition at line 33 of file sifive.c.

RXCTRL_RXCNT

#define RXCTRL_RXCNT

(

x

)

((x) << RXCTRL_RXCNT_SHIFT)

Definition at line 32 of file sifive.c.

RXCTRL_RXCNT_SHIFT

#define RXCTRL_RXCNT_SHIFT   16

Definition at line 31 of file sifive.c.

RXCTRL_RXEN

#define RXCTRL_RXEN   BIT(0)

Definition at line 30 of file sifive.c.

RXDATA_EMPTY

#define RXDATA_EMPTY   BIT(31)

Definition at line 24 of file sifive.c.

TXCTRL_NSTOP

#define TXCTRL_NSTOP

(

x

)

(((x)-1) << TXCTRL_NSTOP_SHIFT)

Definition at line 27 of file sifive.c.

TXCTRL_NSTOP_SHIFT

#define TXCTRL_NSTOP_SHIFT   1

Definition at line 26 of file sifive.c.

TXCTRL_TXCNT

#define TXCTRL_TXCNT

(

x

)

((x) << TXCTRL_TXCNT_SHIFT)

Definition at line 29 of file sifive.c.

TXCTRL_TXCNT_SHIFT

#define TXCTRL_TXCNT_SHIFT   16

Definition at line 28 of file sifive.c.

TXCTRL_TXEN

#define TXCTRL_TXEN   BIT(0)

Definition at line 25 of file sifive.c.

TXDATA_FULL

#define TXDATA_FULL   BIT(31)

Definition at line 23 of file sifive.c.

Function Documentation

sifive_uart_init()

static void sifive_uart_init ( struct sifive_uart_registers *  regs, int  div  )

static

Definition at line 36 of file sifive.c.

References RXCTRL_RXCNT, RXCTRL_RXEN, TXCTRL_NSTOP, TXCTRL_TXCNT, TXCTRL_TXEN, and write32().

Referenced by uart_init().

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uart_can_tx()

static bool uart_can_tx ( struct sifive_uart_registers *  regs )

static

Definition at line 56 of file sifive.c.

References read32(), and TXDATA_FULL.

Referenced by uart_tx_byte().

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uart_fill_lb()

void uart_fill_lb

(

void *

data

)

Definition at line 103 of file sifive.c.

uart_init()

void uart_init

(

unsigned int

idx

)

Definition at line 48 of file sifive.c.

References get_uart_baudrate(), sifive_uart_init(), uart_baudrate_divisor(), uart_input_clock_divider(), uart_platform_baseptr(), and uart_platform_refclk().

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uart_input_clock_divider()

unsigned int uart_input_clock_divider

(

void

)

Definition at line 94 of file sifive.c.

Referenced by uart_init().

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uart_rx_byte()

unsigned char uart_rx_byte

(

unsigned int

idx

)

Definition at line 82 of file sifive.c.

References read32(), sifive_uart_registers::rxdata, RXDATA_EMPTY, and uart_platform_baseptr().

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uart_tx_byte()

void uart_tx_byte	(	unsigned int	idx,
		unsigned char	data
	)

Definition at line 61 of file sifive.c.

References uart_can_tx(), uart_platform_baseptr(), and write32().

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uart_tx_flush()

void uart_tx_flush

(

unsigned int

idx

)

Definition at line 71 of file sifive.c.

References sifive_uart_registers::ip, IP_TXWM, read32(), and uart_platform_baseptr().

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Variable Documentation

__packed

struct sifive_uart_registers __packed