mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
8c3bd6b596
Just to be sure that there is no pending data. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
/*
|
|
* (C) Copyright 2008-2011 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>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <linux/compiler.h>
|
|
#include <serial.h>
|
|
|
|
#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
|
|
#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
|
|
#define SR_RX_FIFO_FULL 0x02 /* 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;
|
|
};
|
|
|
|
static struct uartlite *userial_ports[4] = {
|
|
#ifdef XILINX_UARTLITE_BASEADDR
|
|
[0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
|
|
#endif
|
|
#ifdef XILINX_UARTLITE_BASEADDR1
|
|
[1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
|
|
#endif
|
|
#ifdef XILINX_UARTLITE_BASEADDR2
|
|
[2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
|
|
#endif
|
|
#ifdef XILINX_UARTLITE_BASEADDR3
|
|
[3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
|
|
#endif
|
|
};
|
|
|
|
static void uartlite_serial_putc(const char c, const int port)
|
|
{
|
|
struct uartlite *regs = userial_ports[port];
|
|
|
|
if (c == '\n')
|
|
uartlite_serial_putc('\r', port);
|
|
|
|
while (in_be32(®s->status) & SR_TX_FIFO_FULL)
|
|
;
|
|
out_be32(®s->tx_fifo, c & 0xff);
|
|
}
|
|
|
|
static void uartlite_serial_puts(const char *s, const int port)
|
|
{
|
|
while (*s)
|
|
uartlite_serial_putc(*s++, port);
|
|
}
|
|
|
|
static int uartlite_serial_getc(const int port)
|
|
{
|
|
struct uartlite *regs = userial_ports[port];
|
|
|
|
while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
|
|
;
|
|
return in_be32(®s->rx_fifo) & 0xff;
|
|
}
|
|
|
|
static int uartlite_serial_tstc(const int port)
|
|
{
|
|
struct uartlite *regs = userial_ports[port];
|
|
|
|
return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
|
|
}
|
|
|
|
static int uartlite_serial_init(const int port)
|
|
{
|
|
struct uartlite *regs = userial_ports[port];
|
|
|
|
if (regs) {
|
|
out_be32(®s->control, 0);
|
|
out_be32(®s->control,
|
|
ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);
|
|
in_be32(®s->control);
|
|
return 0;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Multi serial device functions */
|
|
#define DECLARE_ESERIAL_FUNCTIONS(port) \
|
|
static int userial##port##_init(void) \
|
|
{ return uartlite_serial_init(port); } \
|
|
static void userial##port##_setbrg(void) {} \
|
|
static int userial##port##_getc(void) \
|
|
{ return uartlite_serial_getc(port); } \
|
|
static int userial##port##_tstc(void) \
|
|
{ return uartlite_serial_tstc(port); } \
|
|
static void userial##port##_putc(const char c) \
|
|
{ uartlite_serial_putc(c, port); } \
|
|
static void userial##port##_puts(const char *s) \
|
|
{ uartlite_serial_puts(s, port); }
|
|
|
|
/* Serial device descriptor */
|
|
#define INIT_ESERIAL_STRUCTURE(port, __name) { \
|
|
.name = __name, \
|
|
.start = userial##port##_init, \
|
|
.stop = NULL, \
|
|
.setbrg = userial##port##_setbrg, \
|
|
.getc = userial##port##_getc, \
|
|
.tstc = userial##port##_tstc, \
|
|
.putc = userial##port##_putc, \
|
|
.puts = userial##port##_puts, \
|
|
}
|
|
|
|
DECLARE_ESERIAL_FUNCTIONS(0);
|
|
struct serial_device uartlite_serial0_device =
|
|
INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
|
|
DECLARE_ESERIAL_FUNCTIONS(1);
|
|
struct serial_device uartlite_serial1_device =
|
|
INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
|
|
DECLARE_ESERIAL_FUNCTIONS(2);
|
|
struct serial_device uartlite_serial2_device =
|
|
INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
|
|
DECLARE_ESERIAL_FUNCTIONS(3);
|
|
struct serial_device uartlite_serial3_device =
|
|
INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
|
|
|
|
__weak struct serial_device *default_serial_console(void)
|
|
{
|
|
if (userial_ports[0])
|
|
return &uartlite_serial0_device;
|
|
if (userial_ports[1])
|
|
return &uartlite_serial1_device;
|
|
if (userial_ports[2])
|
|
return &uartlite_serial2_device;
|
|
if (userial_ports[3])
|
|
return &uartlite_serial3_device;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void uartlite_serial_initialize(void)
|
|
{
|
|
#ifdef XILINX_UARTLITE_BASEADDR
|
|
serial_register(&uartlite_serial0_device);
|
|
#endif /* XILINX_UARTLITE_BASEADDR */
|
|
#ifdef XILINX_UARTLITE_BASEADDR1
|
|
serial_register(&uartlite_serial1_device);
|
|
#endif /* XILINX_UARTLITE_BASEADDR1 */
|
|
#ifdef XILINX_UARTLITE_BASEADDR2
|
|
serial_register(&uartlite_serial2_device);
|
|
#endif /* XILINX_UARTLITE_BASEADDR2 */
|
|
#ifdef XILINX_UARTLITE_BASEADDR3
|
|
serial_register(&uartlite_serial3_device);
|
|
#endif /* XILINX_UARTLITE_BASEADDR3 */
|
|
}
|