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PXA270: Add support for multiple serial ports. 

This patch adds support for multiple serial ports to the PXA target.
FFUART, BTUART and STUART are supported.

Signed-off-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
stefano babic 2007-08-30 22:57:04 +02:00 committed by Wolfgang Denk
parent 28bb3f72c6
commit 80172c6181
4 changed files with 285 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
common/serial.c
View File

@ -32,7 +32,7 @@ DECLARE_GLOBAL_DATA_PTR;
static struct serial_device *serial_devices = NULL;
static struct serial_device *serial_current = NULL;
#ifndef CONFIG_LWMON
#if !defined(CONFIG_LWMON) && !defined(CONFIG_PXA27X)
struct serial_device *default_serial_console (void)
{
#if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
@ -65,7 +65,7 @@ struct serial_device *default_serial_console (void)
}
#endif
static int serial_register (struct serial_device *dev)
int serial_register (struct serial_device *dev)
{
dev->init += gd->reloc_off;
dev->setbrg += gd->reloc_off;
@ -110,6 +110,15 @@ void serial_initialize (void)
serial_register(&eserial4_device);
#endif
#endif /* CFG_NS16550_SERIAL */
#if defined (CONFIG_FFUART)
serial_register(&serial_ffuart_device);
#endif
#if defined (CONFIG_BTUART)
serial_register(&serial_btuart_device);
#endif
#if defined (CONFIG_STUART)
serial_register(&serial_stuart_device);
#endif
serial_assign (default_serial_console ()->name);
}

241
cpu/pxa/serial.c
View File

@ -30,11 +30,28 @@
#include <common.h>
#include <watchdog.h>
#include <serial.h>
#include <asm/arch/pxa-regs.h>
DECLARE_GLOBAL_DATA_PTR;
void serial_setbrg (void)
#define FFUART 0
#define BTUART 1
#define STUART 2
#ifndef CONFIG_SERIAL_MULTI
#if defined (CONFIG_FFUART)
#define UART_INDEX FFUART
#elif defined (CONFIG_BTUART)
#define UART_INDEX BTUART
#elif defined (CONFIG_STUART)
#define UART_INDEX STUART
#else
#error "Bad: you didn't configure serial ..."
#endif
#endif
void pxa_setbrg_dev (unsigned int uart_index)
{
unsigned int quot = 0;
@ -53,7 +70,8 @@ void serial_setbrg (void)
else
hang ();
#ifdef CONFIG_FFUART
switch (uart_index) {
case FFUART:
#ifdef CONFIG_CPU_MONAHANS
CKENA |= CKENA_22_FFUART;
#else
@ -70,8 +88,9 @@ void serial_setbrg (void)
FFLCR = LCR_WLS0 | LCR_WLS1;
FFIER = IER_UUE; /* Enable FFUART */
break;
#elif defined(CONFIG_BTUART)
case BTUART:
#ifdef CONFIG_CPU_MONAHANS
CKENA |= CKENA_21_BTUART;
#else
@ -89,7 +108,9 @@ void serial_setbrg (void)
BTIER = IER_UUE; /* Enable BFUART */
#elif defined(CONFIG_STUART)
break;
case STUART:
#ifdef CONFIG_CPU_MONAHANS
CKENA |= CKENA_23_STUART;
#else
@ -106,10 +127,11 @@ void serial_setbrg (void)
STLCR = LCR_WLS0 | LCR_WLS1;
STIER = IER_UUE; /* Enable STUART */
break;
#else
#error "Bad: you didn't configure serial ..."
#endif
default:
hang();
}
}
@ -118,9 +140,9 @@ void serial_setbrg (void)
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*
*/
int serial_init (void)
int pxa_init_dev (unsigned int uart_index)
{
serial_setbrg ();
pxa_setbrg_dev (uart_index);
return (0);
}
@ -129,26 +151,32 @@ int serial_init (void)
/*
* Output a single byte to the serial port.
*/
void serial_putc (const char c)
void pxa_putc_dev (unsigned int uart_index,const char c)
{
#ifdef CONFIG_FFUART
switch (uart_index) {
case FFUART:
/* wait for room in the tx FIFO on FFUART */
while ((FFLSR & LSR_TEMT) == 0)
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
FFTHR = c;
#elif defined(CONFIG_BTUART)
break;
case BTUART:
while ((BTLSR & LSR_TEMT ) == 0 )
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
BTTHR = c;
#elif defined(CONFIG_STUART)
break;
case STUART:
while ((STLSR & LSR_TEMT ) == 0 )
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
STTHR = c;
#endif
break;
}
/* If \n, also do \r */
if (c == '\n')
serial_putc ('\r');
pxa_putc_dev (uart_index,'\r');
}
/*
@ -156,15 +184,17 @@ void serial_putc (const char c)
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
int serial_tstc (void)
int pxa_tstc_dev (unsigned int uart_index)
{
#ifdef CONFIG_FFUART
switch (uart_index) {
case FFUART:
return FFLSR & LSR_DR;
#elif defined(CONFIG_BTUART)
case BTUART:
return BTLSR & LSR_DR;
#elif defined(CONFIG_STUART)
case STUART:
return STLSR & LSR_DR;
#endif
}
return -1;
}
/*
@ -172,27 +202,184 @@ int serial_tstc (void)
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
int serial_getc (void)
int pxa_getc_dev (unsigned int uart_index)
{
#ifdef CONFIG_FFUART
switch (uart_index) {
case FFUART:
while (!(FFLSR & LSR_DR))
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
return (char) FFRBR & 0xff;
#elif defined(CONFIG_BTUART)
case BTUART:
while (!(BTLSR & LSR_DR))
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
return (char) BTRBR & 0xff;
#elif defined(CONFIG_STUART)
case STUART:
while (!(STLSR & LSR_DR))
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
return (char) STRBR & 0xff;
#endif
}
return -1;
}
void
serial_puts (const char *s)
pxa_puts_dev (unsigned int uart_index,const char *s)
{
while (*s) {
serial_putc (*s++);
pxa_putc_dev (uart_index,*s++);
}
}
#if defined (CONFIG_FFUART)
static int ffuart_init(void)
{
return pxa_init_dev(FFUART);
}
static void ffuart_setbrg(void)
{
return pxa_setbrg_dev(FFUART);
}
static void ffuart_putc(const char c)
{
return pxa_putc_dev(FFUART,c);
}
static void ffuart_puts(const char *s)
{
return pxa_puts_dev(FFUART,s);
}
static int ffuart_getc(void)
{
return pxa_getc_dev(FFUART);
}
static int ffuart_tstc(void)
{
return pxa_tstc_dev(FFUART);
}
struct serial_device serial_ffuart_device =
{
"serial_ffuart",
"PXA",
ffuart_init,
ffuart_setbrg,
ffuart_getc,
ffuart_tstc,
ffuart_putc,
ffuart_puts,
};
#endif
#if defined (CONFIG_BTUART)
static int btuart_init(void)
{
return pxa_init_dev(BTUART);
}
static void btuart_setbrg(void)
{
return pxa_setbrg_dev(BTUART);
}
static void btuart_putc(const char c)
{
return pxa_putc_dev(BTUART,c);
}
static void btuart_puts(const char *s)
{
return pxa_puts_dev(BTUART,s);
}
static int btuart_getc(void)
{
return pxa_getc_dev(BTUART);
}
static int btuart_tstc(void)
{
return pxa_tstc_dev(BTUART);
}
struct serial_device serial_btuart_device =
{
"serial_btuart",
"PXA",
btuart_init,
btuart_setbrg,
btuart_getc,
btuart_tstc,
btuart_putc,
btuart_puts,
};
#endif
#if defined (CONFIG_STUART)
static int stuart_init(void)
{
return pxa_init_dev(STUART);
}
static void stuart_setbrg(void)
{
return pxa_setbrg_dev(STUART);
}
static void stuart_putc(const char c)
{
return pxa_putc_dev(STUART,c);
}
static void stuart_puts(const char *s)
{
return pxa_puts_dev(STUART,s);
}
static int stuart_getc(void)
{
return pxa_getc_dev(STUART);
}
static int stuart_tstc(void)
{
return pxa_tstc_dev(STUART);
}
struct serial_device serial_stuart_device =
{
"serial_stuart",
"PXA",
stuart_init,
stuart_setbrg,
stuart_getc,
stuart_tstc,
stuart_putc,
stuart_puts,
};
#endif
#ifndef CONFIG_SERIAL_MULTI
inline int serial_init(void) {
return (pxa_init_dev(UART_INDEX));
}
void serial_setbrg(void) {
pxa_setbrg_dev(UART_INDEX);
}
int serial_getc(void) {
return(pxa_getc_dev(UART_INDEX));
}
int serial_tstc(void) {
return(pxa_tstc_dev(UART_INDEX));
}
void serial_putc(const char c) {
pxa_putc_dev(UART_INDEX,c);
}
void serial_puts(const char *s) {
pxa_puts_dev(UART_INDEX,s);
}
#endif /* CONFIG_SERIAL_MULTI */

4
include/serial.h
View File

@ -36,6 +36,10 @@ extern struct serial_device eserial4_device;
#endif
extern struct serial_device serial_ffuart_device;
extern struct serial_device serial_btuart_device;
extern struct serial_device serial_stuart_device;
extern void serial_initialize(void);
extern void serial_devices_init(void);
extern int serial_assign(char * name);

4
lib_arm/board.c
View File

@ -314,6 +314,10 @@ void start_armboot (void)
drv_vfd_init();
#endif /* CONFIG_VFD */
#ifdef CONFIG_SERIAL_MULTI
serial_initialize();
#endif
/* IP Address */
gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");