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serial: uartlite: Support for SERIAL_MULTI

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Add support for SERIAL MULTI for uartlite.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2011-09-25 21:03:08 +00:00 committed by Wolfgang Denk
parent 4b0a03d375
commit 49a23e4a41
3 changed files with 142 additions and 19 deletions
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14
common/serial.c
View File

@ -108,6 +108,20 @@ void serial_initialize (void)
#if defined(CONFIG_SYS_BFIN_UART)
serial_register_bfin_uart();
#endif
#if defined(CONFIG_XILINX_UARTLITE)
# 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 */
#endif /* CONFIG_XILINX_UARTLITE */
serial_assign (default_serial_console ()->name);
}

140
drivers/serial/serial_xuartlite.c
View File

@ -1,5 +1,5 @@
/*
* (C) Copyright 2008 Michal Simek <monstr@monstr.eu>
* (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
* Clean driver and add xilinx constant from header file
*
* (C) Copyright 2004 Atmark Techno, Inc.
@ -25,20 +25,71 @@
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#define RX_FIFO_OFFSET 0 /* receive FIFO, read only */
#define TX_FIFO_OFFSET 4 /* transmit FIFO, write only */
#define STATUS_REG_OFFSET 8 /* status register, read only */
#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 UARTLITE_STATUS (CONFIG_SERIAL_BASE + STATUS_REG_OFFSET)
#define UARTLITE_TX_FIFO (CONFIG_SERIAL_BASE + TX_FIFO_OFFSET)
#define UARTLITE_RX_FIFO (CONFIG_SERIAL_BASE + RX_FIFO_OFFSET)
struct uartlite {
unsigned int rx_fifo;
unsigned int tx_fifo;
unsigned int status;
};
static const 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
};
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(&regs->status) & SR_TX_FIFO_FULL)
;
out_be32(&regs->tx_fifo, c & 0xff);
}
void uartlite_serial_puts(const char *s, const int port)
{
while (*s)
uartlite_serial_putc(*s++, port);
}
int uartlite_serial_getc(const int port)
{
struct uartlite *regs = userial_ports[port];
while (!(in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA))
;
return in_be32(&regs->rx_fifo) & 0xff;
}
int uartlite_serial_tstc(const int port)
{
struct uartlite *regs = userial_ports[port];
return in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA;
}
#if !defined(CONFIG_SERIAL_MULTI)
int serial_init(void)
{
/* FIXME: Nothing for now. We should initialize fifo, etc */
@ -52,26 +103,77 @@ void serial_setbrg(void)
void serial_putc(const char c)
{
if (c == '\n')
serial_putc('\r');
while (in_be32((u32 *) UARTLITE_STATUS) & SR_TX_FIFO_FULL);
out_be32((u32 *) UARTLITE_TX_FIFO, (unsigned char) (c & 0xff));
uartlite_serial_putc(c, 0);
}
void serial_puts(const char * s)
void serial_puts(const char *s)
{
while (*s) {
serial_putc(*s++);
}
uartlite_serial_puts(s, 0);
}
int serial_getc(void)
{
while (!(in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff;
return uartlite_serial_getc(0);
}
int serial_tstc(void)
{
return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
return uartlite_serial_tstc(0);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
/* Multi serial device functions */
#define DECLARE_ESERIAL_FUNCTIONS(port) \
int userial##port##_init(void) \
{ return(0); } \
void userial##port##_setbrg(void) {} \
int userial##port##_getc(void) \
{ return uartlite_serial_getc(port); } \
int userial##port##_tstc(void) \
{ return uartlite_serial_tstc(port); } \
void userial##port##_putc(const char c) \
{ uartlite_serial_putc(c, port); } \
void userial##port##_puts(const char *s) \
{ uartlite_serial_puts(s, port); }
/* Serial device descriptor */
#define INIT_ESERIAL_STRUCTURE(port, name) {\
name,\
userial##port##_init,\
NULL,\
userial##port##_setbrg,\
userial##port##_getc,\
userial##port##_tstc,\
userial##port##_putc,\
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)
{
# ifdef XILINX_UARTLITE_BASEADDR
return &uartlite_serial0_device;
# endif /* XILINX_UARTLITE_BASEADDR */
# ifdef XILINX_UARTLITE_BASEADDR1
return &uartlite_serial1_device;
# endif /* XILINX_UARTLITE_BASEADDR1 */
# ifdef XILINX_UARTLITE_BASEADDR2
return &uartlite_serial2_device;
# endif /* XILINX_UARTLITE_BASEADDR2 */
# ifdef XILINX_UARTLITE_BASEADDR3
return &uartlite_serial3_device;
# endif /* XILINX_UARTLITE_BASEADDR3 */
}
#endif /* CONFIG_SERIAL_MULTI */

7
include/serial.h
View File

@ -50,6 +50,13 @@ extern struct serial_device serial4_device;
extern struct serial_device serial6_device;
#endif
#if defined(CONFIG_XILINX_UARTLITE)
extern struct serial_device uartlite_serial0_device;
extern struct serial_device uartlite_serial1_device;
extern struct serial_device uartlite_serial2_device;
extern struct serial_device uartlite_serial3_device;
#endif
#if defined(CONFIG_S3C2410)
extern struct serial_device s3c24xx_serial0_device;
extern struct serial_device s3c24xx_serial1_device;