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u-boot/drivers/serial/serial_ns16550.c
Tom Rini 7f5eef93af arm: Remove OMAP2420H4 and all omap24xx support 
The omap2420H4 was the only mainline omap24xx board.  Prior to being
fixed by Jon Hunter in time for v2013.04 it had been functionally broken
for a very long time.  Remove this board as there's not been interest in
it in U-Boot for quite a long time.

Signed-off-by: Tom Rini <trini@ti.com>
2013-06-10 08:43:19 -04:00

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/*
* (C) Copyright 2000
* Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <linux/compiler.h>
#include <ns16550.h>
#ifdef CONFIG_NS87308
#include <ns87308.h>
#endif
#include <serial.h>
#ifndef CONFIG_NS16550_MIN_FUNCTIONS
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_CONS_INDEX)
#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
#error "Invalid console index value."
#endif
#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
#error "Console port 1 defined but not configured."
#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
#error "Console port 2 defined but not configured."
#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
#error "Console port 3 defined but not configured."
#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
#error "Console port 4 defined but not configured."
#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
#error "Console port 5 defined but not configured."
#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
#error "Console port 6 defined but not configured."
#endif
/* Note: The port number specified in the functions is 1 based.
* the array is 0 based.
*/
static NS16550_t serial_ports[6] = {
#ifdef CONFIG_SYS_NS16550_COM1
(NS16550_t)CONFIG_SYS_NS16550_COM1,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM2
(NS16550_t)CONFIG_SYS_NS16550_COM2,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM3
(NS16550_t)CONFIG_SYS_NS16550_COM3,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM4
(NS16550_t)CONFIG_SYS_NS16550_COM4,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM5
(NS16550_t)CONFIG_SYS_NS16550_COM5,
#else
NULL,
#endif
#ifdef CONFIG_SYS_NS16550_COM6
(NS16550_t)CONFIG_SYS_NS16550_COM6
#else
NULL
#endif
};
#define PORT serial_ports[port-1]
/* Multi serial device functions */
#define DECLARE_ESERIAL_FUNCTIONS(port) \
static int eserial##port##_init(void) \
{ \
int clock_divisor; \
clock_divisor = calc_divisor(serial_ports[port-1]); \
NS16550_init(serial_ports[port-1], clock_divisor); \
return 0 ; \
} \
static void eserial##port##_setbrg(void) \
{ \
serial_setbrg_dev(port); \
} \
static int eserial##port##_getc(void) \
{ \
return serial_getc_dev(port); \
} \
static int eserial##port##_tstc(void) \
{ \
return serial_tstc_dev(port); \
} \
static void eserial##port##_putc(const char c) \
{ \
serial_putc_dev(port, c); \
} \
static void eserial##port##_puts(const char *s) \
{ \
serial_puts_dev(port, s); \
}
/* Serial device descriptor */
#define INIT_ESERIAL_STRUCTURE(port, __name) { \
.name = __name, \
.start = eserial##port##_init, \
.stop = NULL, \
.setbrg = eserial##port##_setbrg, \
.getc = eserial##port##_getc, \
.tstc = eserial##port##_tstc, \
.putc = eserial##port##_putc, \
.puts = eserial##port##_puts, \
}
static int calc_divisor (NS16550_t port)
{
#ifdef CONFIG_OMAP1510
/* If can't cleanly clock 115200 set div to 1 */
if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
return (1); /* return 1 for base divisor */
}
port->osc_12m_sel = 0; /* clear if previsouly set */
#endif
#ifdef CONFIG_OMAP1610
/* If can't cleanly clock 115200 set div to 1 */
if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
return (26); /* return 26 for base divisor */
}
#endif
#define MODE_X_DIV 16
/* Compute divisor value. Normally, we should simply return:
* CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
* but we need to round that value by adding 0.5.
* Rounding is especially important at high baud rates.
*/
return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
(MODE_X_DIV * gd->baudrate);
}
void
_serial_putc(const char c,const int port)
{
if (c == '\n')
NS16550_putc(PORT, '\r');
NS16550_putc(PORT, c);
}
void
_serial_putc_raw(const char c,const int port)
{
NS16550_putc(PORT, c);
}
void
_serial_puts (const char *s,const int port)
{
while (*s) {
_serial_putc (*s++,port);
}
}
int
_serial_getc(const int port)
{
return NS16550_getc(PORT);
}
int
_serial_tstc(const int port)
{
return NS16550_tstc(PORT);
}
void
_serial_setbrg (const int port)
{
int clock_divisor;
clock_divisor = calc_divisor(PORT);
NS16550_reinit(PORT, clock_divisor);
}
static inline void
serial_putc_dev(unsigned int dev_index,const char c)
{
_serial_putc(c,dev_index);
}
static inline void
serial_putc_raw_dev(unsigned int dev_index,const char c)
{
_serial_putc_raw(c,dev_index);
}
static inline void
serial_puts_dev(unsigned int dev_index,const char *s)
{
_serial_puts(s,dev_index);
}
static inline int
serial_getc_dev(unsigned int dev_index)
{
return _serial_getc(dev_index);
}
static inline int
serial_tstc_dev(unsigned int dev_index)
{
return _serial_tstc(dev_index);
}
static inline void
serial_setbrg_dev(unsigned int dev_index)
{
_serial_setbrg(dev_index);
}
#if defined(CONFIG_SYS_NS16550_COM1)
DECLARE_ESERIAL_FUNCTIONS(1);
struct serial_device eserial1_device =
INIT_ESERIAL_STRUCTURE(1, "eserial0");
#endif
#if defined(CONFIG_SYS_NS16550_COM2)
DECLARE_ESERIAL_FUNCTIONS(2);
struct serial_device eserial2_device =
INIT_ESERIAL_STRUCTURE(2, "eserial1");
#endif
#if defined(CONFIG_SYS_NS16550_COM3)
DECLARE_ESERIAL_FUNCTIONS(3);
struct serial_device eserial3_device =
INIT_ESERIAL_STRUCTURE(3, "eserial2");
#endif
#if defined(CONFIG_SYS_NS16550_COM4)
DECLARE_ESERIAL_FUNCTIONS(4);
struct serial_device eserial4_device =
INIT_ESERIAL_STRUCTURE(4, "eserial3");
#endif
#if defined(CONFIG_SYS_NS16550_COM5)
DECLARE_ESERIAL_FUNCTIONS(5);
struct serial_device eserial5_device =
INIT_ESERIAL_STRUCTURE(5, "eserial4");
#endif
#if defined(CONFIG_SYS_NS16550_COM6)
DECLARE_ESERIAL_FUNCTIONS(6);
struct serial_device eserial6_device =
INIT_ESERIAL_STRUCTURE(6, "eserial5");
#endif
__weak struct serial_device *default_serial_console(void)
{
#if CONFIG_CONS_INDEX == 1
return &eserial1_device;
#elif CONFIG_CONS_INDEX == 2
return &eserial2_device;
#elif CONFIG_CONS_INDEX == 3
return &eserial3_device;
#elif CONFIG_CONS_INDEX == 4
return &eserial4_device;
#elif CONFIG_CONS_INDEX == 5
return &eserial5_device;
#elif CONFIG_CONS_INDEX == 6
return &eserial6_device;
#else
#error "Bad CONFIG_CONS_INDEX."
#endif
}
void ns16550_serial_initialize(void)
{
#if defined(CONFIG_SYS_NS16550_COM1)
serial_register(&eserial1_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM2)
serial_register(&eserial2_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM3)
serial_register(&eserial3_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM4)
serial_register(&eserial4_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM5)
serial_register(&eserial5_device);
#endif
#if defined(CONFIG_SYS_NS16550_COM6)
serial_register(&eserial6_device);
#endif
}
#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */
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