#include "precomp.h"

Include dependency graph for hwuart.c:

Macros
#define	UART_PL01x_DR (LlbHwVersaUartBase + 0x00)

#define	UART_PL01x_RSR (LlbHwVersaUartBase + 0x04)

#define	UART_PL01x_ECR (LlbHwVersaUartBase + 0x04)

#define	UART_PL01x_FR (LlbHwVersaUartBase + 0x18)

#define	UART_PL011_IBRD (LlbHwVersaUartBase + 0x24)

#define	UART_PL011_FBRD (LlbHwVersaUartBase + 0x28)

#define	UART_PL011_LCRH (LlbHwVersaUartBase + 0x2C)

#define	UART_PL011_CR (LlbHwVersaUartBase + 0x30)

#define	UART_PL011_IMSC (LlbHwVersaUartBase + 0x38)

#define	UART_PL011_LCRH_WLEN_8 0x60

#define	UART_PL011_LCRH_FEN 0x10

#define	UART_PL011_CR_UARTEN 0x01

#define	UART_PL011_CR_TXE 0x100

#define	UART_PL011_CR_RXE 0x200

#define	UART_PL01x_FR_RXFE 0x10

#define	UART_PL01x_FR_TXFF 0x20

Functions
VOID NTAPI	LlbHwVersaUartInitialize (VOID)

VOID NTAPI	LlbHwUartSendChar (IN CHAR Char)

BOOLEAN NTAPI	LlbHwUartTxReady (VOID)

ULONG NTAPI	LlbHwGetUartBase (IN ULONG Port)

Variables
static const ULONG	LlbHwVersaUartBase = 0x101F1000

Macro Definition Documentation

◆ UART_PL011_CR

#define UART_PL011_CR (LlbHwVersaUartBase + 0x30)

Definition at line 21 of file hwuart.c.

◆ UART_PL011_CR_RXE

#define UART_PL011_CR_RXE 0x200

Definition at line 35 of file hwuart.c.

◆ UART_PL011_CR_TXE

#define UART_PL011_CR_TXE 0x100

Definition at line 34 of file hwuart.c.

◆ UART_PL011_CR_UARTEN

#define UART_PL011_CR_UARTEN 0x01

Definition at line 33 of file hwuart.c.

◆ UART_PL011_FBRD

#define UART_PL011_FBRD (LlbHwVersaUartBase + 0x28)

Definition at line 19 of file hwuart.c.

◆ UART_PL011_IBRD

#define UART_PL011_IBRD (LlbHwVersaUartBase + 0x24)

Definition at line 18 of file hwuart.c.

◆ UART_PL011_IMSC

#define UART_PL011_IMSC (LlbHwVersaUartBase + 0x38)

Definition at line 22 of file hwuart.c.

◆ UART_PL011_LCRH

#define UART_PL011_LCRH (LlbHwVersaUartBase + 0x2C)

Definition at line 20 of file hwuart.c.

◆ UART_PL011_LCRH_FEN

#define UART_PL011_LCRH_FEN 0x10

Definition at line 28 of file hwuart.c.

◆ UART_PL011_LCRH_WLEN_8

#define UART_PL011_LCRH_WLEN_8 0x60

Definition at line 27 of file hwuart.c.

◆ UART_PL01x_DR

#define UART_PL01x_DR (LlbHwVersaUartBase + 0x00)

Definition at line 14 of file hwuart.c.

◆ UART_PL01x_ECR

#define UART_PL01x_ECR (LlbHwVersaUartBase + 0x04)

Definition at line 16 of file hwuart.c.

◆ UART_PL01x_FR

#define UART_PL01x_FR (LlbHwVersaUartBase + 0x18)

Definition at line 17 of file hwuart.c.

◆ UART_PL01x_FR_RXFE

#define UART_PL01x_FR_RXFE 0x10

Definition at line 40 of file hwuart.c.

◆ UART_PL01x_FR_TXFF

#define UART_PL01x_FR_TXFF 0x20

Definition at line 41 of file hwuart.c.

◆ UART_PL01x_RSR

#define UART_PL01x_RSR (LlbHwVersaUartBase + 0x04)

Definition at line 15 of file hwuart.c.

Function Documentation

◆ LlbHwGetUartBase()

ULONG NTAPI LlbHwGetUartBase ( IN ULONG Port )

Definition at line 101 of file hwuart.c.

{
    if (Port == 0)
    {
        return 0x101F1000;
    }
    else if (Port == 1)
    {
        return 0x101F2000;
    }
 
    return 0;
}

◆ LlbHwUartSendChar()

VOID NTAPI LlbHwUartSendChar ( IN CHAR Char )

Definition at line 85 of file hwuart.c.

{
    /* Send the character */
    WRITE_REGISTER_ULONG(UART_PL01x_DR, Char);
}

◆ LlbHwUartTxReady()

BOOLEAN NTAPI LlbHwUartTxReady ( VOID )

Definition at line 93 of file hwuart.c.

{
    /* TX output buffer is ready? */
    return ((READ_REGISTER_ULONG(UART_PL01x_FR) & UART_PL01x_FR_TXFF) == 0);
}

◆ LlbHwVersaUartInitialize()

VOID NTAPI LlbHwVersaUartInitialize ( VOID )

Definition at line 49 of file hwuart.c.

{
    ULONG Divider, Remainder, Fraction, ClockRate, Baudrate;
 
    /* Query peripheral rate, hardcore baudrate */
    ClockRate = LlbHwGetPClk();
    Baudrate = 115200;
 
    /* Calculate baudrate clock divider and remainder */
    Divider = ClockRate / (16 * Baudrate);
    Remainder = ClockRate % (16 * Baudrate);
 
    /* Calculate the fractional part */
    Fraction = (8 * Remainder / Baudrate) >> 1;
    Fraction += (8 * Remainder / Baudrate) & 1;
 
    /* Disable interrupts */
    WRITE_REGISTER_ULONG(UART_PL011_CR, 0);
 
    /* Set the baud rate to 115200 bps */
    WRITE_REGISTER_ULONG(UART_PL011_IBRD, Divider);
    WRITE_REGISTER_ULONG(UART_PL011_FBRD, Fraction);
 
    /* Set 8 bits for data, 1 stop bit, no parity, FIFO enabled */
    WRITE_REGISTER_ULONG(UART_PL011_LCRH,
                         UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN);
 
    /* Clear and enable FIFO */
    WRITE_REGISTER_ULONG(UART_PL011_CR,
                         UART_PL011_CR_UARTEN |
                         UART_PL011_CR_TXE |
                         UART_PL011_CR_RXE);
}

Referenced by LlbHwInitialize().

Variable Documentation

◆ LlbHwVersaUartBase

const ULONG LlbHwVersaUartBase = 0x101F1000

static

Definition at line 43 of file hwuart.c.

Macros

Functions

Variables