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/*
* Device model for i.MX UART
*
* Copyright (c) 2008 OKL
* Originally Written by Hans Jiang
* Copyright (c) 2011 NICTA Pty Ltd.
* Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef IMX_SERIAL_H
#define IMX_SERIAL_H
#include "hw/sysbus.h"
#include "chardev/char-fe.h"
#include "qom/object.h"
#include "qemu/fifo32.h"
#define TYPE_IMX_SERIAL "imx.serial"
OBJECT_DECLARE_SIMPLE_TYPE(IMXSerialState, IMX_SERIAL)
#define FIFO_SIZE 32
#define URXD_CHARRDY (1<<15) /* character read is valid */
#define URXD_ERR (1<<14) /* Character has error */
#define URXD_OVRRUN (1<<13) /* 32nd character in RX FIFO */
#define URXD_FRMERR (1<<12) /* Character has frame error */
#define URXD_BRK (1<<11) /* Break received */
#define USR1_PARTYER (1<<15) /* Parity Error */
#define USR1_RTSS (1<<14) /* RTS pin status */
#define USR1_TRDY (1<<13) /* Tx ready */
#define USR1_RTSD (1<<12) /* RTS delta: pin changed state */
#define USR1_ESCF (1<<11) /* Escape sequence interrupt */
#define USR1_FRAMERR (1<<10) /* Framing error */
#define USR1_RRDY (1<<9) /* receiver ready */
#define USR1_AGTIM (1<<8) /* Aging timer interrupt */
#define USR1_DTRD (1<<7) /* DTR changed */
#define USR1_RXDS (1<<6) /* Receiver is idle */
#define USR1_AIRINT (1<<5) /* Aysnch IR interrupt */
#define USR1_AWAKE (1<<4) /* Falling edge detected on RXd pin */
#define USR2_ADET (1<<15) /* Autobaud complete */
#define USR2_TXFE (1<<14) /* Transmit FIFO empty */
#define USR2_DTRF (1<<13) /* DTR/DSR transition */
#define USR2_IDLE (1<<12) /* UART has been idle for too long */
#define USR2_ACST (1<<11) /* Autobaud counter stopped */
#define USR2_RIDELT (1<<10) /* Ring Indicator delta */
#define USR2_RIIN (1<<9) /* Ring Indicator Input */
#define USR2_IRINT (1<<8) /* Serial Infrared Interrupt */
#define USR2_WAKE (1<<7) /* Start bit detected */
#define USR2_DCDDELT (1<<6) /* Data Carrier Detect delta */
#define USR2_DCDIN (1<<5) /* Data Carrier Detect Input */
#define USR2_RTSF (1<<4) /* RTS transition */
#define USR2_TXDC (1<<3) /* Transmission complete */
#define USR2_BRCD (1<<2) /* Break condition detected */
#define USR2_ORE (1<<1) /* Overrun error */
#define USR2_RDR (1<<0) /* Receive data ready */
#define UCR1_TRDYEN (1<<13) /* Tx Ready Interrupt Enable */
#define UCR1_RRDYEN (1<<9) /* Rx Ready Interrupt Enable */
#define UCR1_TXMPTYEN (1<<6) /* Tx Empty Interrupt Enable */
#define UCR1_UARTEN (1<<0) /* UART Enable */
#define UCR2_ATEN (1<<3) /* Ageing Timer Enable */
#define UCR2_TXEN (1<<2) /* Transmitter enable */
#define UCR2_RXEN (1<<1) /* Receiver enable */
#define UCR2_SRST (1<<0) /* Reset complete */
#define UCR4_DREN BIT(0) /* Receive Data Ready interrupt enable */
#define UCR4_OREN BIT(1) /* Overrun interrupt enable */
#define UCR4_TCEN BIT(3) /* TX complete interrupt enable */
#define UCR4_WKEN BIT(7) /* WAKE interrupt enable */
#define UTS1_TXEMPTY (1<<6)
#define UTS1_RXEMPTY (1<<5)
#define UTS1_TXFULL (1<<4)
#define UTS1_RXFULL (1<<3)
#define TL_MASK 0x3f
/* Bit time in nanoseconds assuming maximum baud rate of 115200 */
#define BIT_TIME_NS 8681
/* Assume 8 bits per character */
#define NUM_BITS 8
/* Ageing timer triggers after 8 characters */
#define AGE_DURATION_NS (8 * NUM_BITS * BIT_TIME_NS)
struct IMXSerialState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion iomem;
QEMUTimer ageing_timer;
Fifo32 rx_fifo;
uint32_t usr1;
uint32_t usr2;
uint32_t ucr1;
uint32_t ucr2;
uint32_t uts1;
/*
* The registers below are implemented just so that the
* guest OS sees what it has written
*/
uint32_t onems;
uint32_t ufcr;
uint32_t ubmr;
uint32_t ubrc;
uint32_t ucr3;
uint32_t ucr4;
qemu_irq irq;
CharBackend chr;
};
#endif
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