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u-boot/arch/powerpc/cpu/ppc4xx/4xx_uart.c
Anatolij Gustschin fbb0030e38 serial: struct serial_device: add uninit() entry for drivers 
Subsequent patch extends mpc512x serial driver to support
multiple PSC ports. The driver will provide an uninit()
function to stop the serial controller and to disable the
controller's clock. Adding uninit() entry to struct serial_device
allows disabling the serial controller after usage of
a stdio serial device.

This patch adds uninit() entry to the struct serial_device
and fixes initialization of this structure in the code
accordingly.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
2010-04-24 21:34:07 +02:00

880 lines
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/*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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
*/
/*
* This source code is dual-licensed. You may use it under the terms of the
* GNU General Public License version 2, or under the license below.
*
* This source code has been made available to you by IBM on an AS-IS
* basis. Anyone receiving this source is licensed under IBM
* copyrights to use it in any way he or she deems fit, including
* copying it, modifying it, compiling it, and redistributing it either
* with or without modifications. No license under IBM patents or
* patent applications is to be implied by the copyright license.
*
* Any user of this software should understand that IBM cannot provide
* technical support for this software and will not be responsible for
* any consequences resulting from the use of this software.
*
* Any person who transfers this source code or any derivative work
* must include the IBM copyright notice, this paragraph, and the
* preceding two paragraphs in the transferred software.
*
* COPYRIGHT I B M CORPORATION 1995
* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
*/
#include <common.h>
#include <commproc.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <watchdog.h>
#include <ppc4xx.h>
#ifdef CONFIG_SERIAL_MULTI
#include <serial.h>
#endif
#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
#include <malloc.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
defined(CONFIG_405EX) || defined(CONFIG_440)
#if defined(CONFIG_440)
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define UART0_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000300)
#define UART1_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000400)
#else
#define UART0_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000200)
#define UART1_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000300)
#endif
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
#define UART2_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000600)
#endif
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define UART2_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000500)
#define UART3_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000600)
#endif
#if defined(CONFIG_440GP)
#define CR0_MASK 0x3fff0000
#define CR0_EXTCLK_ENA 0x00600000
#define CR0_UDIV_POS 16
#define UDIV_SUBTRACT 1
#define UART0_SDR CPC0_CR0
#define MFREG(a, d) d = mfdcr(a)
#define MTREG(a, d) mtdcr(a, d)
#else /* #if defined(CONFIG_440GP) */
/* all other 440 PPC's access clock divider via sdr register */
#define CR0_MASK 0xdfffffff
#define CR0_EXTCLK_ENA 0x00800000
#define CR0_UDIV_POS 0
#define UDIV_SUBTRACT 0
#define UART0_SDR SDR0_UART0
#define UART1_SDR SDR0_UART1
#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
defined(CONFIG_440GR) || defined(CONFIG_440GRX) || \
defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define UART2_SDR SDR0_UART2
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
defined(CONFIG_440GR) || defined(CONFIG_440GRX) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define UART3_SDR SDR0_UART3
#endif
#define MFREG(a, d) mfsdr(a, d)
#define MTREG(a, d) mtsdr(a, d)
#endif /* #if defined(CONFIG_440GP) */
#elif defined(CONFIG_405EP) || defined(CONFIG_405EZ)
#define UART0_BASE 0xef600300
#define UART1_BASE 0xef600400
#define UCR0_MASK 0x0000007f
#define UCR1_MASK 0x00007f00
#define UCR0_UDIV_POS 0
#define UCR1_UDIV_POS 8
#define UDIV_MAX 127
#elif defined(CONFIG_405EX)
#define UART0_BASE 0xef600200
#define UART1_BASE 0xef600300
#define CR0_MASK 0x000000ff
#define CR0_EXTCLK_ENA 0x00800000
#define CR0_UDIV_POS 0
#define UDIV_SUBTRACT 0
#define UART0_SDR SDR0_UART0
#define UART1_SDR SDR0_UART1
#else /* CONFIG_405GP || CONFIG_405CR */
#define UART0_BASE 0xef600300
#define UART1_BASE 0xef600400
#define CR0_MASK 0x00001fff
#define CR0_EXTCLK_ENA 0x000000c0
#define CR0_UDIV_POS 1
#define UDIV_MAX 32
#endif
/* using serial port 0 or 1 as U-Boot console ? */
#if defined(CONFIG_UART1_CONSOLE)
#define ACTING_UART0_BASE UART1_BASE
#define ACTING_UART1_BASE UART0_BASE
#else
#define ACTING_UART0_BASE UART0_BASE
#define ACTING_UART1_BASE UART1_BASE
#endif
#if defined(CONFIG_405EP) && defined(CONFIG_SYS_EXT_SERIAL_CLOCK)
#error "External serial clock not supported on AMCC PPC405EP!"
#endif
#define UART_RBR 0x00
#define UART_THR 0x00
#define UART_IER 0x01
#define UART_IIR 0x02
#define UART_FCR 0x02
#define UART_LCR 0x03
#define UART_MCR 0x04
#define UART_LSR 0x05
#define UART_MSR 0x06
#define UART_SCR 0x07
#define UART_DLL 0x00
#define UART_DLM 0x01
/*-----------------------------------------------------------------------------+
| Line Status Register.
+-----------------------------------------------------------------------------*/
#define asyncLSRDataReady1 0x01
#define asyncLSROverrunError1 0x02
#define asyncLSRParityError1 0x04
#define asyncLSRFramingError1 0x08
#define asyncLSRBreakInterrupt1 0x10
#define asyncLSRTxHoldEmpty1 0x20
#define asyncLSRTxShiftEmpty1 0x40
#define asyncLSRRxFifoError1 0x80
#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
/*-----------------------------------------------------------------------------+
| Fifo
+-----------------------------------------------------------------------------*/
typedef struct {
char *rx_buffer;
ulong rx_put;
ulong rx_get;
} serial_buffer_t;
volatile static serial_buffer_t buf_info;
#endif
static void serial_init_common(u32 base, u32 udiv, u16 bdiv)
{
PPC4xx_SYS_INFO sys_info;
u8 val;
get_sys_info(&sys_info);
/* Correct UART frequency in bd-info struct now that
* the UART divisor is available
*/
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
gd->uart_clk = CONFIG_SYS_EXT_SERIAL_CLOCK;
#else
gd->uart_clk = sys_info.freqUART / udiv;
#endif
out_8((u8 *)base + UART_LCR, 0x80); /* set DLAB bit */
out_8((u8 *)base + UART_DLL, bdiv); /* set baudrate divisor */
out_8((u8 *)base + UART_DLM, bdiv >> 8); /* set baudrate divisor */
out_8((u8 *)base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
out_8((u8 *)base + UART_FCR, 0x00); /* disable FIFO */
out_8((u8 *)base + UART_MCR, 0x00); /* no modem control DTR RTS */
val = in_8((u8 *)base + UART_LSR); /* clear line status */
val = in_8((u8 *)base + UART_RBR); /* read receive buffer */
out_8((u8 *)base + UART_SCR, 0x00); /* set scratchpad */
out_8((u8 *)base + UART_IER, 0x00); /* set interrupt enable reg */
}
#if (defined(CONFIG_440) || defined(CONFIG_405EX)) && \
!defined(CONFIG_SYS_EXT_SERIAL_CLOCK)
static void serial_divs (int baudrate, unsigned long *pudiv,
unsigned short *pbdiv)
{
sys_info_t sysinfo;
unsigned long div; /* total divisor udiv * bdiv */
unsigned long umin; /* minimum udiv */
unsigned short diff; /* smallest diff */
unsigned long udiv; /* best udiv */
unsigned short idiff; /* current diff */
unsigned short ibdiv; /* current bdiv */
unsigned long i;
unsigned long est; /* current estimate */
get_sys_info(&sysinfo);
udiv = 32; /* Assume lowest possible serial clk */
div = sysinfo.freqPLB / (16 * baudrate); /* total divisor */
umin = sysinfo.pllOpbDiv << 1; /* 2 x OPB divisor */
diff = 32; /* highest possible */
/* i is the test udiv value -- start with the largest
* possible (32) to minimize serial clock and constrain
* search to umin.
*/
for (i = 32; i > umin; i--) {
ibdiv = div / i;
est = i * ibdiv;
idiff = (est > div) ? (est-div) : (div-est);
if (idiff == 0) {
udiv = i;
break; /* can't do better */
} else if (idiff < diff) {
udiv = i; /* best so far */
diff = idiff; /* update lowest diff*/
}
}
*pudiv = udiv;
*pbdiv = div / udiv;
}
#elif defined(CONFIG_405EZ)
static void serial_divs (int baudrate, unsigned long *pudiv,
unsigned short *pbdiv)
{
sys_info_t sysinfo;
unsigned long div; /* total divisor udiv * bdiv */
unsigned long umin; /* minimum udiv */
unsigned short diff; /* smallest diff */
unsigned long udiv; /* best udiv */
unsigned short idiff; /* current diff */
unsigned short ibdiv; /* current bdiv */
unsigned long i;
unsigned long est; /* current estimate */
unsigned long plloutb;
unsigned long cpr_pllc;
u32 reg;
/* check the pll feedback source */
mfcpr(CPR0_PLLC, cpr_pllc);
get_sys_info(&sysinfo);
plloutb = ((CONFIG_SYS_CLK_FREQ * ((cpr_pllc & PLLC_SRC_MASK) ?
sysinfo.pllFwdDivB : sysinfo.pllFwdDiv) *
sysinfo.pllFbkDiv) / sysinfo.pllFwdDivB);
udiv = 256; /* Assume lowest possible serial clk */
div = plloutb / (16 * baudrate); /* total divisor */
umin = (plloutb / get_OPB_freq()) << 1; /* 2 x OPB divisor */
diff = 256; /* highest possible */
/* i is the test udiv value -- start with the largest
* possible (256) to minimize serial clock and constrain
* search to umin.
*/
for (i = 256; i > umin; i--) {
ibdiv = div / i;
est = i * ibdiv;
idiff = (est > div) ? (est-div) : (div-est);
if (idiff == 0) {
udiv = i;
break; /* can't do better */
} else if (idiff < diff) {
udiv = i; /* best so far */
diff = idiff; /* update lowest diff*/
}
}
*pudiv = udiv;
mfcpr(CPC0_PERD0, reg);
reg &= ~0x0000ffff;
reg |= ((udiv - 0) << 8) | (udiv - 0);
mtcpr(CPC0_PERD0, reg);
*pbdiv = div / udiv;
}
#endif /* defined(CONFIG_440) && !defined(CONFIG_SYS_EXT_SERIAL_CLK) */
/*
* Minimal serial functions needed to use one of the SMC ports
* as serial console interface.
*/
#if defined(CONFIG_440)
int serial_init_dev(unsigned long base)
{
unsigned long reg;
unsigned long udiv;
unsigned short bdiv;
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
unsigned long tmp;
#endif
MFREG(UART0_SDR, reg);
reg &= ~CR0_MASK;
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
reg |= CR0_EXTCLK_ENA;
udiv = 1;
tmp = gd->baudrate * 16;
bdiv = (CONFIG_SYS_EXT_SERIAL_CLOCK + tmp / 2) / tmp;
#else
/* For 440, the cpu clock is on divider chain A, UART on divider
* chain B ... so cpu clock is irrelevant. Get the "optimized"
* values that are subject to the 1/2 opb clock constraint
*/
serial_divs (gd->baudrate, &udiv, &bdiv);
#endif
reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */
/*
* Configure input clock to baudrate generator for all
* available serial ports here
*/
MTREG(UART0_SDR, reg);
#if defined(UART1_SDR)
MTREG(UART1_SDR, reg);
#endif
#if defined(UART2_SDR)
MTREG(UART2_SDR, reg);
#endif
#if defined(UART3_SDR)
MTREG(UART3_SDR, reg);
#endif
serial_init_common(base, udiv, bdiv);
return (0);
}
#else /* !defined(CONFIG_440) */
int serial_init_dev (unsigned long base)
{
unsigned long reg;
unsigned long tmp;
unsigned long clk;
unsigned long udiv;
unsigned short bdiv;
#ifdef CONFIG_405EX
clk = tmp = 0;
mfsdr(UART0_SDR, reg);
reg &= ~CR0_MASK;
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
reg |= CR0_EXTCLK_ENA;
udiv = 1;
tmp = gd->baudrate * 16;
bdiv = (CONFIG_SYS_EXT_SERIAL_CLOCK + tmp / 2) / tmp;
#else
serial_divs(gd->baudrate, &udiv, &bdiv);
#endif
reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */
/*
* Configure input clock to baudrate generator for all
* available serial ports here
*/
mtsdr(UART0_SDR, reg);
#if defined(UART1_SDR)
mtsdr(UART1_SDR, reg);
#endif
#elif defined(CONFIG_405EZ)
serial_divs(gd->baudrate, &udiv, &bdiv);
clk = tmp = reg = 0;
#else
#ifdef CONFIG_405EP
reg = mfdcr(CPC0_UCR) & ~(UCR0_MASK | UCR1_MASK);
clk = gd->cpu_clk;
tmp = CONFIG_SYS_BASE_BAUD * 16;
udiv = (clk + tmp / 2) / tmp;
if (udiv > UDIV_MAX) /* max. n bits for udiv */
udiv = UDIV_MAX;
reg |= (udiv) << UCR0_UDIV_POS; /* set the UART divisor */
reg |= (udiv) << UCR1_UDIV_POS; /* set the UART divisor */
mtdcr (CPC0_UCR, reg);
#else /* CONFIG_405EP */
reg = mfdcr(CPC0_CR0) & ~CR0_MASK;
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
clk = CONFIG_SYS_EXT_SERIAL_CLOCK;
udiv = 1;
reg |= CR0_EXTCLK_ENA;
#else
clk = gd->cpu_clk;
#ifdef CONFIG_SYS_405_UART_ERRATA_59
udiv = 31; /* Errata 59: stuck at 31 */
#else
tmp = CONFIG_SYS_BASE_BAUD * 16;
udiv = (clk + tmp / 2) / tmp;
if (udiv > UDIV_MAX) /* max. n bits for udiv */
udiv = UDIV_MAX;
#endif
#endif
reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */
mtdcr (CPC0_CR0, reg);
#endif /* CONFIG_405EP */
tmp = gd->baudrate * udiv * 16;
bdiv = (clk + tmp / 2) / tmp;
#endif /* CONFIG_405EX */
serial_init_common(base, udiv, bdiv);
return (0);
}
#endif /* if defined(CONFIG_440) */
void serial_setbrg_dev(unsigned long base)
{
serial_init_dev(base);
}
void serial_putc_dev(unsigned long base, const char c)
{
int i;
if (c == '\n')
serial_putc_dev(base, '\r');
/* check THRE bit, wait for transmiter available */
for (i = 1; i < 3500; i++) {
if ((in_8((u8 *)base + UART_LSR) & 0x20) == 0x20)
break;
udelay (100);
}
out_8((u8 *)base + UART_THR, c); /* put character out */
}
void serial_puts_dev (unsigned long base, const char *s)
{
while (*s)
serial_putc_dev (base, *s++);
}
int serial_getc_dev (unsigned long base)
{
unsigned char status = 0;
while (1) {
#if defined(CONFIG_HW_WATCHDOG)
WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
#endif /* CONFIG_HW_WATCHDOG */
status = in_8((u8 *)base + UART_LSR);
if ((status & asyncLSRDataReady1) != 0x0)
break;
if ((status & ( asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1 )) != 0) {
out_8((u8 *)base + UART_LSR,
asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1);
}
}
return (0x000000ff & (int) in_8((u8 *)base));
}
int serial_tstc_dev (unsigned long base)
{
unsigned char status;
status = in_8((u8 *)base + UART_LSR);
if ((status & asyncLSRDataReady1) != 0x0)
return (1);
if ((status & ( asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1 )) != 0) {
out_8((u8 *)base + UART_LSR,
asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1);
}
return 0;
}
#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
void serial_isr (void *arg)
{
int space;
int c;
const int rx_get = buf_info.rx_get;
int rx_put = buf_info.rx_put;
if (rx_get <= rx_put)
space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get);
else
space = rx_get - rx_put;
while (serial_tstc_dev (ACTING_UART0_BASE)) {
c = serial_getc_dev (ACTING_UART0_BASE);
if (space) {
buf_info.rx_buffer[rx_put++] = c;
space--;
}
if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO)
rx_put = 0;
if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) {
/* Stop flow by setting RTS inactive */
out_8((u8 *)ACTING_UART0_BASE + UART_MCR,
in_8((u8 *)ACTING_UART0_BASE + UART_MCR) &
(0xFF ^ 0x02));
}
}
buf_info.rx_put = rx_put;
}
void serial_buffered_init (void)
{
serial_puts ("Switching to interrupt driven serial input mode.\n");
buf_info.rx_buffer = malloc (CONFIG_SERIAL_SOFTWARE_FIFO);
buf_info.rx_put = 0;
buf_info.rx_get = 0;
if (in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10)
serial_puts ("Check CTS signal present on serial port: OK.\n");
else
serial_puts ("WARNING: CTS signal not present on serial port.\n");
irq_install_handler ( VECNUM_U0 /*UART0 */ /*int vec */ ,
serial_isr /*interrupt_handler_t *handler */ ,
(void *) &buf_info /*void *arg */ );
/* Enable "RX Data Available" Interrupt on UART */
out_8(ACTING_UART0_BASE + UART_IER, 0x01);
/* Set DTR active */
out_8(ACTING_UART0_BASE + UART_MCR,
in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x01);
/* Start flow by setting RTS active */
out_8(ACTING_UART0_BASE + UART_MCR,
in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x02);
/* Setup UART FIFO: RX trigger level: 4 byte, Enable FIFO */
out_8(ACTING_UART0_BASE + UART_FCR, (1 << 6) | 1);
}
void serial_buffered_putc (const char c)
{
/* Wait for CTS */
#if defined(CONFIG_HW_WATCHDOG)
while (!(in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10))
WATCHDOG_RESET ();
#else
while (!(in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10));
#endif
serial_putc (c);
}
void serial_buffered_puts (const char *s)
{
serial_puts (s);
}
int serial_buffered_getc (void)
{
int space;
int c;
int rx_get = buf_info.rx_get;
int rx_put;
#if defined(CONFIG_HW_WATCHDOG)
while (rx_get == buf_info.rx_put)
WATCHDOG_RESET ();
#else
while (rx_get == buf_info.rx_put);
#endif
c = buf_info.rx_buffer[rx_get++];
if (rx_get == CONFIG_SERIAL_SOFTWARE_FIFO)
rx_get = 0;
buf_info.rx_get = rx_get;
rx_put = buf_info.rx_put;
if (rx_get <= rx_put)
space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get);
else
space = rx_get - rx_put;
if (space > CONFIG_SERIAL_SOFTWARE_FIFO / 2) {
/* Start flow by setting RTS active */
out_8(ACTING_UART0_BASE + UART_MCR,
in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x02);
}
return c;
}
int serial_buffered_tstc (void)
{
return (buf_info.rx_get != buf_info.rx_put) ? 1 : 0;
}
#endif /* CONFIG_SERIAL_SOFTWARE_FIFO */
#if defined(CONFIG_CMD_KGDB)
/*
AS HARNOIS : according to CONFIG_KGDB_SER_INDEX kgdb uses serial port
number 0 or number 1
- if CONFIG_KGDB_SER_INDEX = 1 => serial port number 0 :
configuration has been already done
- if CONFIG_KGDB_SER_INDEX = 2 => serial port number 1 :
configure port 1 for serial I/O with rate = CONFIG_KGDB_BAUDRATE
*/
#if (CONFIG_KGDB_SER_INDEX & 2)
void kgdb_serial_init (void)
{
u8 val;
u16 br_reg;
get_clocks ();
br_reg = (((((gd->cpu_clk / 16) / 18) * 10) / CONFIG_KGDB_BAUDRATE) +
5) / 10;
/*
* Init onboard 16550 UART
*/
out_8((u8 *)ACTING_UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */
out_8((u8 *)ACTING_UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */
out_8((u8 *)ACTING_UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */
out_8((u8 *)ACTING_UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */
out_8((u8 *)ACTING_UART1_BASE + UART_FCR, 0x00); /* disable FIFO */
out_8((u8 *)ACTING_UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */
val = in_8((u8 *)ACTING_UART1_BASE + UART_LSR); /* clear line status */
val = in_8((u8 *)ACTING_UART1_BASE + UART_RBR); /* read receive buffer */
out_8((u8 *)ACTING_UART1_BASE + UART_SCR, 0x00); /* set scratchpad */
out_8((u8 *)ACTING_UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */
}
void putDebugChar (const char c)
{
if (c == '\n')
serial_putc ('\r');
out_8((u8 *)ACTING_UART1_BASE + UART_THR, c); /* put character out */
/* check THRE bit, wait for transfer done */
while ((in_8((u8 *)ACTING_UART1_BASE + UART_LSR) & 0x20) != 0x20);
}
void putDebugStr (const char *s)
{
while (*s)
serial_putc (*s++);
}
int getDebugChar (void)
{
unsigned char status = 0;
while (1) {
status = in_8((u8 *)ACTING_UART1_BASE + UART_LSR);
if ((status & asyncLSRDataReady1) != 0x0)
break;
if ((status & (asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1 )) != 0) {
out_8((u8 *)ACTING_UART1_BASE + UART_LSR,
asyncLSRFramingError1 |
asyncLSROverrunError1 |
asyncLSRParityError1 |
asyncLSRBreakInterrupt1);
}
}
return (0x000000ff & (int) in_8((u8 *)ACTING_UART1_BASE));
}
void kgdb_interruptible (int yes)
{
return;
}
#else /* ! (CONFIG_KGDB_SER_INDEX & 2) */
void kgdb_serial_init (void)
{
serial_printf ("[on serial] ");
}
void putDebugChar (int c)
{
serial_putc (c);
}
void putDebugStr (const char *str)
{
serial_puts (str);
}
int getDebugChar (void)
{
return serial_getc ();
}
void kgdb_interruptible (int yes)
{
return;
}
#endif /* (CONFIG_KGDB_SER_INDEX & 2) */
#endif
#if defined(CONFIG_SERIAL_MULTI)
int serial0_init(void)
{
return (serial_init_dev(UART0_BASE));
}
int serial1_init(void)
{
return (serial_init_dev(UART1_BASE));
}
void serial0_setbrg (void)
{
serial_setbrg_dev(UART0_BASE);
}
void serial1_setbrg (void)
{
serial_setbrg_dev(UART1_BASE);
}
void serial0_putc(const char c)
{
serial_putc_dev(UART0_BASE,c);
}
void serial1_putc(const char c)
{
serial_putc_dev(UART1_BASE, c);
}
void serial0_puts(const char *s)
{
serial_puts_dev(UART0_BASE, s);
}
void serial1_puts(const char *s)
{
serial_puts_dev(UART1_BASE, s);
}
int serial0_getc(void)
{
return(serial_getc_dev(UART0_BASE));
}
int serial1_getc(void)
{
return(serial_getc_dev(UART1_BASE));
}
int serial0_tstc(void)
{
return (serial_tstc_dev(UART0_BASE));
}
int serial1_tstc(void)
{
return (serial_tstc_dev(UART1_BASE));
}
struct serial_device serial0_device =
{
"serial0",
"UART0",
serial0_init,
NULL,
serial0_setbrg,
serial0_getc,
serial0_tstc,
serial0_putc,
serial0_puts,
};
struct serial_device serial1_device =
{
"serial1",
"UART1",
serial1_init,
NULL,
serial1_setbrg,
serial1_getc,
serial1_tstc,
serial1_putc,
serial1_puts,
};
#else
/*
* Wrapper functions
*/
int serial_init(void)
{
return serial_init_dev(ACTING_UART0_BASE);
}
void serial_setbrg(void)
{
serial_setbrg_dev(ACTING_UART0_BASE);
}
void serial_putc(const char c)
{
serial_putc_dev(ACTING_UART0_BASE, c);
}
void serial_puts(const char *s)
{
serial_puts_dev(ACTING_UART0_BASE, s);
}
int serial_getc(void)
{
return serial_getc_dev(ACTING_UART0_BASE);
}
int serial_tstc(void)
{
return serial_tstc_dev(ACTING_UART0_BASE);
}
#endif /* CONFIG_SERIAL_MULTI */
#endif /* CONFIG_405GP || CONFIG_405CR */
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