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Add preliminary support for Z16F serial port

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@560 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2008-01-23 20:38:12 +00:00
parent d1142ca09c
commit 261b0e7f58
4 changed files with 800 additions and 31 deletions
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2
arch/z16/src/z16f/Make.defs
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@ -44,5 +44,5 @@ CMN_CSRCS = up_allocateheap.c up_initialize.c up_schedulesigaction.c \
up_exit.c up_releasestack.c up_idle.c up_reprioritizertr.c
CHIP_SSRCS = z16f_lowuart.S
CHIP_CSRCS = z16f_clkinit.c z16f_irq.c z16f_timerisr.c
CHIP_CSRCS = z16f_clkinit.c z16f_irq.c z16f_timerisr.c z16f_serial.c

58
arch/z16/src/z16f/chip.h
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@ -322,7 +322,24 @@
# define Z16F_GPIOK_SMRE _HX32(ffffe198) /* 8-bits: Port K Stop Mode Recovery En */
#endif
/* UART0/1 registers ****************************************************************/
/* UART Register Offsets *************************************************************/
#define Z16F_UART_TXD _HX8(00) /* 8-bits: UART Transmit Data */
#define Z16F_UART_RXD _HX8(00) /* 8-bits: UART Receive Data */
#define Z16F_UART_STAT0 _HX8(01) /* 8-bits: UART Status 0 */
#define Z16F_UART_CTL _HX8(02) /* 16-bits: UART Control */
#define Z16F_UART_CTL0 _HX8(02) /* 8-bits: UART Control 0 */
#define Z16F_UART_CTL1 _HX8(03) /* 8-bits: UART COntrol 1 */
#define Z16F_UART_MDSTAT _HX8(04) /* 8-bits: UART Mode Select & Status */
#define Z16F_UART_ADDR _HX8(05) /* 8-bits: UART Address Compare */
#define Z16F_UART_BR _HX8(06) /* 16-bits: UART Baud Rate */
#define Z16F_UART_BRH _HX8(06) /* 8-bits: UART Baud Rate High Byte */
#define Z16F_UART_BRL _HX8(07) /* 8-bits: UART Baud Rate Low Byte */
#define Z16F_UART0_BASE _HX32(ffffe200) /* UART0 Register Base Address */
#define Z16F_UART1_BASE _HX32(ffffe210) /* UART1 Register Base Address */
/* UART0/1 Registers ****************************************************************/
#define Z16F_UART0_TXD _HX32(ffffe200) /* 8-bits: UART0 Transmit Data */
#define Z16F_UART0_RXD _HX32(ffffe200) /* 8-bits: UART0 Receive Data */
@ -348,6 +365,45 @@
#define Z16F_UART1_BRH _HX32(ffffe216) /* 8-bits: UART1 Baud Rate High Byte */
#define Z16F_UART1_BRL _HX32(ffffe217) /* 8-bits: UART1 Baud Rate Low Byte */
/* UART0/1 Status 0 Register Bit Definitions ****************************************/
#define Z16F_UARTSTAT0_RDA _HX8(0x80) /* Bit 7: Receive Data Available */
#define Z16F_UARTSTAT0_PE _HX8(0x40) /* Bit 6: Parity Error */
#define Z16F_UARTSTAT0_OE _HX8(0x20) /* Bit 5: Overrun Error */
#define Z16F_UARTSTAT0_FE _HX8(0x10) /* Bit 4: Framing Error */
#define Z16F_UARTSTAT0_BRKD _HX8(0x08) /* Bit 3: Break Detect */
#define Z16F_UARTSTAT0_TDRE _HX8(0x04) /* Bit 2: Transmitter Data Register Empty */
#define Z16F_UARTSTAT0_TXE _HX8(0x02) /* Bit 1: Transmitter Empty */
#define Z16F_UARTSTAT0_CTS _HX8(0x01) /* Bit 0: Clear To Send */
/* UART0/1 Control 0/1 Register Bit Definitions *************************************/
#define Z16F_UARTCTL0_TEN _HX8(0x80) /* Bit 7: Transmit Enable */
#define Z16F_UARTCTL0_REN _HX8(0x40) /* Bit 6: Receive Enable */
#define Z16F_UARTCTL0_CTSE _HX8(0x20) /* Bit 5: CTS Enable */
#define Z16F_UARTCTL0_PEN _HX8(0x10) /* Bit 4: Parity Enable */
#define Z16F_UARTCTL0_PSEL _HX8(0x08) /* Bit 3: Odd Parity Select */
#define Z16F_UARTCTL0_SBRK _HX8(0x04) /* Bit 2: Send Break */
#define Z16F_UARTCTL0_STOP _HX8(0x02) /* Bit 1: Stop Bit Select */
#define Z16F_UARTCTL0_LBEN _HX8(0x01) /* Bit 0: Loopback Enable */
#define Z16F_UARTCTL1_MPMD1 _HX8(0x80) /* Bit 7: Multiprocessor Mode (bit1) */
#define Z16F_UARTCTL1_MPEN _HX8(0x40) /* Bit 6: Multiprocessor Enable */
#define Z16F_UARTCTL1_MPMD0 _HX8(0x20) /* Bit 5: Multiprocessor Mode (bit0) */
#define Z16F_UARTCTL1_MPBT _HX8(0x10) /* Bit 4: Multiprocessor Bit Transmit */
#define Z16F_UARTCTL1_DEPOL _HX8(0x08) /* Bit 3: Driver Enable Polarity */
#define Z16F_UARTCTL1_BRGCTL _HX8(0x04) /* Bit 2: Baud Rate Generator Control */
#define Z16F_UARTCTL1_RDAIRQ _HX8(0x02) /* Bit 1: Receive Data Interrupt Enable */
#define Z16F_UARTCTL1_IREN _HX8(0x01) /* Bit 0: Infrared Encoder/Decoder Eanble */
/* UART0/1 Mode Status/Select Register Bit Definitions ******************************/
#define Z16F_UARTMDSEL_NORMAL _HX8(0x00) /* Bits 5-7=0: Multiprocessor and Normal Mode */
#define Z16F_UARTMDSEL_FILTER _HX8(0x20) /* Bits 5-7=1: Noise Filter Control/Status */
#define Z16F_UARTMDSEL_LINP _HX8(0x40) /* Bits 5-7=2: LIN protocol Contol/Status */
#define Z16F_UARTMDSEL_HWREV _HX8(0xe0) /* Bits 5-7=7: LIN-UART Hardware Revision */
/* Bits 0-4: Mode dependent status */
/* Timer0/1/2 registers *************************************************************/
#define Z16F_TIMER0_HL _HX32(ffffe300) /* 16-bit: Timer 0 */

70
arch/z16/src/z16f/z16f_lowuart.S
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@ -79,42 +79,55 @@
* Initialize UART0 or UART1
*
* Parameters:
* r1 = 0:UART0 1:UART1
* r2 = Frequency
* r3 = BAUD rate
* None
*
*************************************************************************/
z16f_lowuartinit:
pushmlo <r0,R3> /* Save registers */
pushmlo <r0, r3> /* Save registers */
/* Calculate and set the baud rate generation register */
ld r3, #_SYS_CLK_FREQ
ld r0, R3
sll r0, #3
#ifdef CONFIG_UART0_SERIAL_CONSOLE
sll r0, #CONFIG_UART0_BAUD
ld r3, #CONFIG_UART0_BAUD /* r3 = baud */
#else
sll r0, #CONFIG_UART1_BAUD
ld r3, #CONFIG_UART1_BAUD /* r3 = baud */
#endif
sll R3, #4
udiv r0, R3 /* BRG = (freq + baud * 8)/(baud * 16) */
ld r0, r3 /* r0 = baud */
sll r0, #3 /* r0 = baud * 8 */
add r0, #_SYS_CLK_FREQ /* r3 = freq + baud * 8*/
sll r3, #4 /* r3 = baud * 16 */
udiv r0, r3 /* BRG = (freq + baud * 8)/(baud * 16) */
#ifdef CONFIG_UART0_SERIAL_CONSOLE
ld.w Z16F_UART0_BR, r0 /* Z16F_UART0_BR = BRG */
/* Set the GPIO Alternate Function Register Lo (AFL) register */
ld r0, #%30
or.b Z16F_GPIOA_AFL, r0 /* Z16F_GPIOA_AFL |= %30 */
/* Enable UART receive (REN) and transmit (TEN) */
clr.b Z16F_UART0_CTL1 /* Z16F_UART0_CTL1 = 0 */
ld r0, #%c0
ld r0, #(Z16F_UARTCTL0_TEN|Z16F_UARTCTL0_REN)
ld.b Z16F_UART0_CTL0, r0 /* Z16F_UART0_CTL0 = %c0 */
#else
ld.w Z16F_UART1_BR, r0 /* Z16F_UART1_BR = BRG */
/* Set the GPIO Alternate Function Register Lo (AFL) register */
ld r0, #%30
or.b Z16F_GPIOD_AFL, r0 /* Z16F_GPIOD_AFL |= %30 */
/* Enable UART receive (REN) and transmit (TEN) */
clr.b Z16F_UART1_CTL1 /* Z16F_UART1_CTL1 = 0 */
ld r0, #%c0
ld r0, #(Z16F_UARTCTL0_TEN|Z16F_UARTCTL0_REN)
ld.b Z16F_UART1_CTL0, r0 /* Z16F_UART1_CTL0 = %c0 */
#endif
popmlo <r0, R3> /* Restore registers */
popmlo <r0, r3> /* Restore registers */
ret /* Return */
@ -131,22 +144,21 @@ z16f_lowuartinit:
#ifdef CONFIG_ARCH_LOWPUTC
_z16f_xmitc:
pushmlo <r0> /* Save registers */
pushmlo <r0> /* Save registers */
_z16f_xmitc1:
ld r0, #Z16F_UARTSTAT0_TDRE /* TDRE=Transmitter Data Register Empty */
#ifdef CONFIG_UART0_SERIAL_CONSOLE
ld r0,#4
tm.b Z16F_UART0_STAT0,r0
jp eq, _z16f_xmitc1 /* While (!(Z16F_UART0_STAT0 & %4)) */
ld.b Z16F_UART0_TXD,r1 /* Z16F_UART0_TXD = r1 (character) */
tm.b Z16F_UART0_STAT0, r0 /* r0 = Z16F_UART0_STAT0 */
jp eq, _z16f_xmitc1 /* While (!(Z16F_UART0_STAT0 & TDRE)) */
ld.b Z16F_UART0_TXD, r1 /* Z16F_UART0_TXD = r1 (character) */
#else
ld r0,#4
tm.b Z16F_UART1_STAT0,r0
jp eq, _z16f_xmitc1 /* While (!(Z16F_UART1_STAT0 & %4)) */
ld.b Z16F_UART1_TXD,r1 /* Z16F_UART1_TXD = r1 (character) */
tm.b Z16F_UART1_STAT0, r0 /* r0 = Z16F_UART0_STAT1 */
jp eq, _z16f_xmitc1 /* While (!(Z16F_UART1_STAT0 & TDRE)) */
ld.b Z16F_UART1_TXD, r1 /* Z16F_UART1_TXD = r1 (character) */
#endif
popmlo <r0> /* Restore registers */
ret /* Return */
popmlo <r0> /* Restore registers */
ret /* Return */
#endif
/*************************************************************************
@ -200,13 +212,13 @@ _up_lowputc1:
#ifdef CONFIG_ARCH_LOWGETC
_up_lowgetc:
up_lowgetc1:
ld r0, #%80
ld r0, #Z16F_UARTSTAT0_RDA /* RDA=Receive data available */
#ifdef CONFIG_UART0_SERIAL_CONSOLE
tm.b Z16F_UART0_STAT0,r0
jp eq, _up_lowgetc1 /* While (!Z16F_UART0_STAT0 & %80)) */
tm.b Z16F_UART0_STAT0, r0
jp eq, _up_lowgetc1 /* While (!Z16F_UART0_STAT0 & RDA)) */
ld.ub r0, Z16F_UART0_RXD /* r0 = Z16F_UART0_RXD */
#else
tm.b Z16F_UART1_STAT0,r0 /* While (!Z16F_UART1_STAT0 & %80) */
tm.b Z16F_UART1_STAT0,r0 /* While (!Z16F_UART1_STAT0 & RDA) */
jp eq, _up_lowgetc1
ld.ub r0, Z16F_UART1_RXD /* r0 = Z16F_UART1_RXD */
#endif

701
arch/z16/src/z16f/z16f_serial.c Normal file
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@ -0,0 +1,701 @@
/****************************************************************************
* arch/z16/src/z16f/z16f_serial.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <unistd.h>
#include <semaphore.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/serial.h>
#include <arch/serial.h>
#include "up_arch.h"
#include "os_internal.h"
#include "up_internal.h"
#if CONFIG_NFILE_DESCRIPTORS > 0
/****************************************************************************
* Definitions
****************************************************************************/
#define BASE_BAUD 115200
/* System clock frequency value from ZDS target settings */
extern _Erom unsigned long SYS_CLK_FREQ;
#define _DEFCLK ((unsigned long)&SYS_CLK_FREQ)
/****************************************************************************
* Private Types
****************************************************************************/
struct z16f_uart_s
{
uint32 uartbase; /* Base address of UART
* registers */
uint32 baud; /* Configured baud */
uint16 msr; /* Saved MSR value */
ubyte irq; /* IRQ associated with
* this UART */
ubyte parity; /* 0=none, 1=odd, 2=even */
boolean stopbits2; /* TRUE: Configure with 2
* stop bits instead of 1 */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int z16f_setup(struct uart_dev_s *dev);
static void z16f_shutdown(struct uart_dev_s *dev);
static int z16f_interrupt(int irq, void *context);
static int z16f_ioctl(struct file *filep, int cmd, unsigned long arg);
static int z16f_receive(struct uart_dev_s *dev, uint32 *status);
static void z16f_rxint(struct uart_dev_s *dev, boolean enable);
static boolean z16f_rxfifonotempty(struct uart_dev_s *dev);
static void z16f_send(struct uart_dev_s *dev, int ch);
static void z16f_txint(struct uart_dev_s *dev, boolean enable);
static boolean z16f_txfifonotfull(struct uart_dev_s *dev);
static boolean z16f_txfifoempty(struct uart_dev_s *dev);
/****************************************************************************
* Private Variables
****************************************************************************/
struct uart_ops_s g_uart_ops =
{
z16f_setup, /* setup */
z16f_shutdown, /* shutdown */
z16f_interrupt, /* handler */
z16f_ioctl, /* ioctl */
z16f_receive, /* receive */
z16f_rxint, /* rxint */
z16f_rxfifonotempty, /* rxfifonotempty */
z16f_send, /* send */
z16f_txint, /* txint */
z16f_txfifonotfull, /* txfifonotfull */
z16f_txfifoempty /* txfifoempty */
};
/* I/O buffers */
static char g_uart0rxbuffer[CONFIG_UART0_RXBUFSIZE];
static char g_uart0txbuffer[CONFIG_UART0_TXBUFSIZE];
static char g_uart1rxbuffer[CONFIG_UART1_RXBUFSIZE];
static char g_uart1txbuffer[CONFIG_UART1_TXBUFSIZE];
/* This describes the state of the DM320 uart0 port. */
static struct z16f_uart_s g_uart0priv =
{
Z16F_UART0_BASE, /* uartbase */
CONFIG_UART0_BAUD, /* baud */
0, /* msr */
CONFIG_UART0_PARITY, /* parity */
CONFIG_UART0_2STOP /* stopbits2 */
};
static uart_dev_t g_uart0port =
{
0, /* open_count */
/* REVISIT */
Z16F_IRQ_UART0TX, /* txirq */
Z16F_IRQ_UART0RX, /* rxirq */
FALSE, /* xmitwaiting */
FALSE, /* recvwaiting */
#ifdef CONFIG_UART0_SERIAL_CONSOLE
TRUE, /* isconsole */
#else
FALSE, /* isconsole */
#endif
{ 0 }, /* closesem */
{ 0 }, /* xmitsem */
{ 0 ], /* recvsem */
{
{ 0 }, /* xmit.sem */
0, /* xmit.head */
0, /* xmit.tail */
CONFIG_UART0_TXBUFSIZE, /* xmit.size */
g_uart0txbuffer, /* xmit.buffer */
},
{
{ 0 }, /* recv.sem */
0, /* recv.head */
0, /* recv.tail */
CONFIG_UART0_RXBUFSIZE, /* recv.size */
g_uart0rxbuffer, /* recv.buffer */
},
&g_uart_ops, /* ops */
&g_uart0priv, /* priv */
};
/* This describes the state of the DM320 uart1 port. */
static struct z16f_uart_s g_uart1priv =
{
Z16F_UART1_BASE, /* uartbase */
CONFIG_UART1_BAUD, /* baud */
0, /* msr */
CONFIG_UART1_PARITY, /* parity */
CONFIG_UART1_2STOP /* stopbits2 */
};
static uart_dev_t g_uart1port =
{
0, /* open_count */
/* REVISIT */
Z16F_IRQ_UART1TX, /* txirq */
Z16F_IRQ_UART1RX, /* rxirq */
FALSE, /* xmitwaiting */
FALSE, /* recvwaiting */
#ifdef CONFIG_UART0_SERIAL_CONSOLE
TRUE, /* isconsole */
#else
FALSE, /* isconsole */
#endif
{ 0 }, /* closesem */
{ 0 }, /* xmitsem */
{ 0 ], /* recvsem */
{
{ 0 }, /* xmit.sem */
0, /* xmit.head */
0, /* xmit.tail */
CONFIG_UART1_TXBUFSIZE, /* xmit.size */
g_uart1txbuffer, /* xmit.buffer */
},
{
{ 0 }, /* recv.sem */
0, /* recv.head */
0, /* recv.tail */
CONFIG_UART0_RXBUFSIZE, /* recv.size */
g_uart0rxbuffer, /* recv.buffer */
},
&g_uart_ops, /* ops */
&g_uart1priv, /* priv */
};
/* Now, which one with be tty0/console and which tty1? */
#ifdef CONFIG_UART1_SERIAL_CONSOLE
# define CONSOLE_DEV g_uart1port
# define TTYS0_DEV g_uart1port
# define TTYS1_DEV g_uart0port
#else
# define CONSOLE_DEV g_uart0port
# define TTYS0_DEV g_uart0port
# define TTYS1_DEV g_uart1port
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: z16f_serialout
****************************************************************************/
static void z16f_serialout(struct z16f_uart_s *priv, int offset, ubyte value)
{
putreg8(value, priv->uartbase + offset);
}
/****************************************************************************
* Name: z16f_disableuartirq
****************************************************************************/
static ubyte z16f_disableuartirq(struct z16f_uart_s *priv)
{
/* REVISIT */
return 0;
}
/****************************************************************************
* Name: z16f_restoreuartirq
****************************************************************************/
static void z16f_restoreuartirq(struct z16f_uart_s *priv, ubyte state)
{
/* REVISIT */
}
/****************************************************************************
* Name: z16f_waittrde
****************************************************************************/
static void z16f_waittrde(struct z16f_uart_s *priv)
{
int tmp;
for (tmp = 1000 ; tmp > 0 ; tmp--)
{
if ((getreg8(priv->uartbase + Z16F_UART_STAT0) & Z16F_UARTSTAT0_TDRE) != 0)
{
break;
}
}
}
/****************************************************************************
* Name: z16f_setup
*
* Description:
* Configure the UART baud, parity, etc. This method is called the first
* time that the serial port is opened.
*
****************************************************************************/
static int z16f_setup(struct uart_dev_s *dev)
{
#ifdef CONFIG_SUPPRESS_UART_CONFIG
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
uint32 brg;
ubyte ctl0;
ubyte ctl1;
/* Calculate and set the baud rate generation register.
* BRG = (freq + baud * 8)/(baud * 16)
*/
brg = (_DEFCLK + (priv->baud << 3))/(priv->baud << 4);
putreg16((uint16)brg, priv->uartbase + Z16F_UART_BR);
/* Configure STOP bits */
ctl0 = ctl1 = 0;
if (priv->stopbits2)
{
ctl0 |= Z16F_UARTCTL0_STOP;
}
/* Configure parity */
if (priv->parity == 1)
{
ctl0 |= (Z16F_UARTCTL0_PEN|Z16F_UARTCTL0_PSEL);
}
else if (priv->parity == 2)
{
ctl0 |= Z16F_UARTCTL0_PEN;
}
putreg8(ctl0, priv->uartbase + Z16F_UART_CTL0);
putreg8(ctl1, priv->uartbase + Z16F_UART_CTL1);
/* Enable UART receive (REN) and transmit (TEN) */
ctl0 |= (Z16F_UARTCTL0_TEN|Z16F_UARTCTL0_REN);
putreg8(ctl0, priv->uartbase + Z16F_UART_CTL0);
#endif
return OK;
}
/****************************************************************************
* Name: z16f_shutdown
*
* Description:
* Disable the UART. This method is called when the serial
* port is closed
*
****************************************************************************/
static void z16f_shutdown(struct uart_dev_s *dev)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
(void)z16f_disableuartirq(priv);
}
/****************************************************************************
* Name: z16f_interrupt
*
* Description:
* This is the UART interrupt handler. It will be invoked
* when an interrupt received on the 'irq' It should call
* uart_transmitchars or uart_receivechar to perform the
* appropriate data transfers. The interrupt handling logic\
* must be able to map the 'irq' number into the approprite
* uart_dev_s structure in order to call these functions.
*
****************************************************************************/
static int z16f_interrupt(int irq, void *context)
{
struct uart_dev_s *dev = NULL;
struct z16f_uart_s *priv;
ubyte status;
int passes;
/* REVISIT */
#if 0
if (g_uart1port.txirq == irq || g_uart1port.rxirq == irq)
{
dev = &g_uart1port;
}
else if (g_uart0port.txirq == irq || g_uart0port.rxirq == irq)
{
dev = &g_uart0port;
}
else
#endif
{
PANIC(OSERR_INTERNAL);
}
priv = (struct z16f_uart_s*)dev->priv;
/* Loop while there is something to do */
for (;;)
{
/* Get the current UART status */
status = getreg8(priv->uartbase + Z16F_UART_STAT0);
if ((status & (Z16F_UARTSTAT0_RDA|Z16F_UARTSTAT0_TDRE)) == 0)
{
break;
}
else
{
/* Handline incoming, receive bytes */
if (status & Z16F_UARTSTAT0_RDA)
{
uart_recvchars(dev);
}
/* Handle outgoing, transmit bytes */
if (status & Z16F_UARTSTAT0_TDRE)
{
uart_xmitchars(dev);
}
/* Keep track of how many times we do this in case there
* is some hardware failure condition.
*/
if (++passes > 256)
{
break;
}
}
}
}
/****************************************************************************
* Name: z16f_ioctl
*
* Description:
* All ioctl calls will be routed through this method
*
****************************************************************************/
static int z16f_ioctl(struct file *filep, int cmd, unsigned long arg)
{
*get_errno_ptr() = ENOTTY;
return ERROR;
}
/****************************************************************************
* Name: z16f_receive
*
* Description:
* Called (usually) from the interrupt level to receive one character from
* the UART. Error bits associated with the receipt are provided in the
* return 'status'.
*
****************************************************************************/
static int z16f_receive(struct uart_dev_s *dev, uint32 *status)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
ubyte rxd;
ubyte stat0;
rxd = getreg8(priv->uartbase + Z16F_UART_RXD);
stat0 = getreg8(priv->uartbase + Z16F_UART_STAT0);
*status = (uint32)rxd | (((uint32)stat0) << 8);
return rxd;
}
/****************************************************************************
* Name: z16f_rxint
*
* Description:
* Call to enable or disable RX interrupts
*
****************************************************************************/
static void z16f_rxint(struct uart_dev_s *dev, boolean enable)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
/* REVISIT */
#if 0
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
up_enable_irq(priv->rxirq);
#endif
}
else
{
up_disable_irq(priv->rxirq);
}
#endif
}
/****************************************************************************
* Name: z16f_rxfifonotempty
*
* Description:
* Return TRUE if the receive fifo is not empty
*
****************************************************************************/
static boolean z16f_rxfifonotempty(struct uart_dev_s *dev)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
return ((getreg8(priv->uartbase + Z16F_UART_STAT0) & Z16F_UARTSTAT0_RDA) != 0);
}
/****************************************************************************
* Name: z16f_send
*
* Description:
* This method will send one byte on the UART
*
****************************************************************************/
static void z16f_send(struct uart_dev_s *dev, int ch)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
putreg8(ch, priv->uartbase + Z16F_UART1_TXD);
}
/****************************************************************************
* Name: z16f_txint
*
* Description:
* Call to enable or disable TX interrupts
*
****************************************************************************/
static void z16f_txint(struct uart_dev_s *dev, boolean enable)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
/* REVISIT */
#if 0
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
up_enable_irq(priv->txirq);
#endif
}
else
{
up_disable_irq(priv->txirq);
}
#endif
}
/****************************************************************************
* Name: z16f_txfifonotfull
*
* Description:
* Return TRUE if the tranmsit fifo is not full
*
****************************************************************************/
static boolean z16f_txfifonotfull(struct uart_dev_s *dev)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
return ((getreg8(priv->uartbase + Z16F_UART_STAT0) & Z16F_UARTSTAT0_TDRE) != 0);
}
/****************************************************************************
* Name: z16f_txfifoempty
*
* Description:
* Return TRUE if the transmit fifo is empty
*
****************************************************************************/
static boolean z16f_txfifoempty(struct uart_dev_s *dev)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)dev->priv;
return ((getreg8(priv->uartbase + Z16F_UART_STAT0) & Z16F_UARTSTAT0_TXE) != 0);
}
/****************************************************************************
* Public Funtions
****************************************************************************/
/****************************************************************************
* Name: z16f_serialinit
*
* Description:
* Performs the low level UART initialization early in
* debug so that the serial console will be available
* during bootup. This must be called before z16f_serialinit.
*
****************************************************************************/
void up_earlyserialinit(void)
{
(void)z16f_disableuartirq(TTYS0_DEV.priv);
(void)z16f_disableuartirq(TTYS1_DEV.priv);
CONSOLE_DEV.isconsole = TRUE;
z16f_setup(&CONSOLE_DEV);
}
/****************************************************************************
* Name: z16f_serialinit
*
* Description:
* Register serial console and serial ports. This assumes
* that up_earlyserialinit was called previously.
*
****************************************************************************/
void z16f_serialinit(void)
{
(void)uart_register("/dev/console", &CONSOLE_DEV);
(void)uart_register("/dev/ttyS0", &TTYS0_DEV);
(void)uart_register("/dev/ttyS1", &TTYS1_DEV);
}
/****************************************************************************
* Name: up_putc
*
* Description:
* Provide priority, low-level access to support OS debug
* writes
*
****************************************************************************/
int up_putc(int ch)
{
struct z16f_uart_s *priv = (struct z16f_uart_s*)CONSOLE_DEV.priv;
ubyte state;
state = z16f_disableuartirq(priv);
z16f_waittrde(priv);
z16f_serialout(priv, UART_DTRR, (uint16)ch);
/* Check for LF */
if (ch == '\n')
{
/* Add CR */
z16f_waittrde(priv);
z16f_serialout(priv, UART_DTRR, '\r');
}
z16f_waittrde(priv);
z16f_restoreuartirq(priv, state);
return ch;
}
#else /* CONFIG_NFILE_DESCRIPTORS > 0 */
/****************************************************************************
* Definitions
****************************************************************************/
#ifdef CONFIG_UART1_SERIAL_CONSOLE
# define z16f_contrde() \
do { \
int tmp; \
for (tmp = 1000 ; tmp > 0 ; tmp--) \
if ((getreg8(Z16F_UART1_STAT0) & Z16F_UARTSTAT0_TDRE) != 0) \
break; \
} while (0)
# define z16f_contxd(ch) \
putreg8((ubyte)(ch), Z16F_UART1_STAT0)
#else
# define z16f_contrde() \
do { \
int tmp; \
for (tmp = 1000 ; tmp > 0 ; tmp--) \
if ((getreg8(Z16F_UART0_STAT0) & Z16F_UARTSTAT0_TDRE) != 0) \
break; \
} while (0)
# define z16f_contxd(ch) \
putreg8((ubyte)(ch), Z16F_UART0_STAT0)
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
int up_putc(int ch)
{
z16f_contrde();
z16f_contxd(ch);
/* Check for LF */
if (ch == '\n')
{
/* Add CR */
z16f_contrde();
z16f_contxd('\r');
}
return ch;
}
#endif /* CONFIG_NFILE_DESCRIPTORS > 0 */