uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * (C) Copyright 2008 - 2015 Michal Simek <monstr@monstr.eu>

 * Clean driver and add xilinx constant from header file

 *

 * (C) Copyright 2004 Atmark Techno, Inc.

 * Yasushi SHOJI <yashi@atmark-techno.com>

 */

​

#include <config.h>

#include <common.h>

#include <dm.h>

#include <asm/io.h>

#include <linux/compiler.h>

#include <serial.h>

​

#define SR_TX_FIFO_FULL     BIT(3) /* transmit FIFO full */

#define SR_TX_FIFO_EMPTY    BIT(2) /* transmit FIFO empty */

#define SR_RX_FIFO_VALID_DATA   BIT(0) /* data in receive FIFO */

#define SR_RX_FIFO_FULL     BIT(1) /* receive FIFO full */

​

#define ULITE_CONTROL_RST_TX    0x01

#define ULITE_CONTROL_RST_RX    0x02

​

struct uartlite {

    unsigned int rx_fifo;

    unsigned int tx_fifo;

    unsigned int status;

    unsigned int control;

};

​

struct uartlite_platdata {

    struct uartlite *regs;

};

​

static int uartlite_serial_putc(struct udevice *dev, const char ch)

{

    struct uartlite_platdata *plat = dev_get_platdata(dev);

    struct uartlite *regs = plat->regs;

​

    if (in_be32(&regs->status) & SR_TX_FIFO_FULL)

        return -EAGAIN;

​

    out_be32(&regs->tx_fifo, ch & 0xff);

​

    return 0;

}

​

static int uartlite_serial_getc(struct udevice *dev)

{

    struct uartlite_platdata *plat = dev_get_platdata(dev);

    struct uartlite *regs = plat->regs;

​

    if (!(in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA))

        return -EAGAIN;

​

    return in_be32(&regs->rx_fifo) & 0xff;

}

​

static int uartlite_serial_pending(struct udevice *dev, bool input)

{

    struct uartlite_platdata *plat = dev_get_platdata(dev);

    struct uartlite *regs = plat->regs;