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/*
* (C) Copyright 2000 - 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*
* Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
* changes based on the file arch/powerpc/mbxboot/m8260_tty.c from the
* Linux/PPC sources (m8260_tty.c had no copyright info in it).
*
* Martin Krause, 8 Jun 2006
* Added SERIAL_MULTI support
*/
/*
* Minimal serial functions needed to use one of the PSC ports
* as serial console interface.
*/
#include <common.h>
#include <linux/compiler.h>
#include <mpc5xxx.h>
#include <serial.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_PSC_CONSOLE)
#if CONFIG_PSC_CONSOLE == 1
#define PSC_BASE MPC5XXX_PSC1
#elif CONFIG_PSC_CONSOLE == 2
#define PSC_BASE MPC5XXX_PSC2
#elif CONFIG_PSC_CONSOLE == 3
#define PSC_BASE MPC5XXX_PSC3
#elif CONFIG_PSC_CONSOLE == 4
#define PSC_BASE MPC5XXX_PSC4
#elif CONFIG_PSC_CONSOLE == 5
#define PSC_BASE MPC5XXX_PSC5
#elif CONFIG_PSC_CONSOLE == 6
#define PSC_BASE MPC5XXX_PSC6
#else
#error CONFIG_PSC_CONSOLE must be in 1 ... 6
#endif
#if defined(CONFIG_PSC_CONSOLE2)
#if CONFIG_PSC_CONSOLE2 == 1
#define PSC_BASE2 MPC5XXX_PSC1
#elif CONFIG_PSC_CONSOLE2 == 2
#define PSC_BASE2 MPC5XXX_PSC2
#elif CONFIG_PSC_CONSOLE2 == 3
#define PSC_BASE2 MPC5XXX_PSC3
#elif CONFIG_PSC_CONSOLE2 == 4
#define PSC_BASE2 MPC5XXX_PSC4
#elif CONFIG_PSC_CONSOLE2 == 5
#define PSC_BASE2 MPC5XXX_PSC5
#elif CONFIG_PSC_CONSOLE2 == 6
#define PSC_BASE2 MPC5XXX_PSC6
#else
#error CONFIG_PSC_CONSOLE2 must be in 1 ... 6
#endif
#endif
int serial_init_dev (unsigned long dev_base)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
unsigned long baseclk;
int div;
/* reset PSC */
psc->command = PSC_SEL_MODE_REG_1;
/* select clock sources */
psc->psc_clock_select = 0;
baseclk = (gd->arch.ipb_clk + 16) / 32;
/* switch to UART mode */
psc->sicr = 0;
/* configure parity, bit length and so on */
psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
psc->mode = PSC_MODE_ONE_STOP;
/* set up UART divisor */
div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
psc->ctur = (div >> 8) & 0xff;
psc->ctlr = div & 0xff;
/* disable all interrupts */
psc->psc_imr = 0;
/* reset and enable Rx/Tx */
psc->command = PSC_RST_RX;
psc->command = PSC_RST_TX;
psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
return (0);
}
void serial_putc_dev (unsigned long dev_base, const char c)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
if (c == '\n')
serial_putc_dev (dev_base, '\r');
/* Wait for last character to go. */
while (!(psc->psc_status & PSC_SR_TXEMP))
;
psc->psc_buffer_8 = c;
}
void serial_puts_dev (unsigned long dev_base, const char *s)
{
while (*s) {
serial_putc_dev (dev_base, *s++);
}
}
int serial_getc_dev (unsigned long dev_base)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
/* Wait for a character to arrive. */
while (!(psc->psc_status & PSC_SR_RXRDY))
;
return psc->psc_buffer_8;
}
int serial_tstc_dev (unsigned long dev_base)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
return (psc->psc_status & PSC_SR_RXRDY);
}
void serial_setbrg_dev (unsigned long dev_base)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
unsigned long baseclk, div;
baseclk = (gd->arch.ipb_clk + 16) / 32;
/* set up UART divisor */
div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
psc->ctur = (div >> 8) & 0xFF;
psc->ctlr = div & 0xff;
}
void serial_setrts_dev (unsigned long dev_base, int s)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
if (s) {
/* Assert RTS (become LOW) */
psc->op1 = 0x1;
}
else {
/* Negate RTS (become HIGH) */
psc->op0 = 0x1;
}
}
int serial_getcts_dev (unsigned long dev_base)
{
volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
return (psc->ip & 0x1) ? 0 : 1;
}
int serial0_init(void)
{
return (serial_init_dev(PSC_BASE));
}
void serial0_setbrg (void)
{
serial_setbrg_dev(PSC_BASE);
}
void serial0_putc(const char c)
{
serial_putc_dev(PSC_BASE,c);
}
void serial0_puts(const char *s)
{
serial_puts_dev(PSC_BASE, s);
}
int serial0_getc(void)
{
return(serial_getc_dev(PSC_BASE));
}
int serial0_tstc(void)
{
return (serial_tstc_dev(PSC_BASE));
}
struct serial_device serial0_device =
{
.name = "serial0",
.start = serial0_init,
.stop = NULL,
.setbrg = serial0_setbrg,
.getc = serial0_getc,
.tstc = serial0_tstc,
.putc = serial0_putc,
.puts = serial0_puts,
};
__weak struct serial_device *default_serial_console(void)
{
return &serial0_device;
}
#ifdef CONFIG_PSC_CONSOLE2
int serial1_init(void)
{
return serial_init_dev(PSC_BASE2);
}
void serial1_setbrg(void)
{
serial_setbrg_dev(PSC_BASE2);
}
void serial1_putc(const char c)
{
serial_putc_dev(PSC_BASE2, c);
}
void serial1_puts(const char *s)
{
serial_puts_dev(PSC_BASE2, s);
}
int serial1_getc(void)
{
return serial_getc_dev(PSC_BASE2);
}
int serial1_tstc(void)
{
return serial_tstc_dev(PSC_BASE2);
}
struct serial_device serial1_device =
{
.name = "serial1",
.start = serial1_init,
.stop = NULL,
.setbrg = serial1_setbrg,
.getc = serial1_getc,
.tstc = serial1_tstc,
.putc = serial1_putc,
.puts = serial1_puts,
};
#endif /* CONFIG_PSC_CONSOLE2 */
#endif /* CONFIG_PSC_CONSOLE */
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