1 /* 2 * Device model for i.MX UART 3 * 4 * Copyright (c) 2008 OKL 5 * Originally Written by Hans Jiang 6 * Copyright (c) 2011 NICTA Pty Ltd. 7 * Updated by Jean-Christophe Dubois <jcd@tribudubois.net> 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 * 14 * You should have received a copy of the GNU General Public License along 15 * with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef IMX_SERIAL_H 19 #define IMX_SERIAL_H 20 21 #include "hw/sysbus.h" 22 #include "chardev/char-fe.h" 23 24 #define TYPE_IMX_SERIAL "imx.serial" 25 #define IMX_SERIAL(obj) OBJECT_CHECK(IMXSerialState, (obj), TYPE_IMX_SERIAL) 26 27 #define URXD_CHARRDY (1<<15) /* character read is valid */ 28 #define URXD_ERR (1<<14) /* Character has error */ 29 #define URXD_BRK (1<<11) /* Break received */ 30 31 #define USR1_PARTYER (1<<15) /* Parity Error */ 32 #define USR1_RTSS (1<<14) /* RTS pin status */ 33 #define USR1_TRDY (1<<13) /* Tx ready */ 34 #define USR1_RTSD (1<<12) /* RTS delta: pin changed state */ 35 #define USR1_ESCF (1<<11) /* Escape sequence interrupt */ 36 #define USR1_FRAMERR (1<<10) /* Framing error */ 37 #define USR1_RRDY (1<<9) /* receiver ready */ 38 #define USR1_AGTIM (1<<8) /* Aging timer interrupt */ 39 #define USR1_DTRD (1<<7) /* DTR changed */ 40 #define USR1_RXDS (1<<6) /* Receiver is idle */ 41 #define USR1_AIRINT (1<<5) /* Aysnch IR interrupt */ 42 #define USR1_AWAKE (1<<4) /* Falling edge detected on RXd pin */ 43 44 #define USR2_ADET (1<<15) /* Autobaud complete */ 45 #define USR2_TXFE (1<<14) /* Transmit FIFO empty */ 46 #define USR2_DTRF (1<<13) /* DTR/DSR transition */ 47 #define USR2_IDLE (1<<12) /* UART has been idle for too long */ 48 #define USR2_ACST (1<<11) /* Autobaud counter stopped */ 49 #define USR2_RIDELT (1<<10) /* Ring Indicator delta */ 50 #define USR2_RIIN (1<<9) /* Ring Indicator Input */ 51 #define USR2_IRINT (1<<8) /* Serial Infrared Interrupt */ 52 #define USR2_WAKE (1<<7) /* Start bit detected */ 53 #define USR2_DCDDELT (1<<6) /* Data Carrier Detect delta */ 54 #define USR2_DCDIN (1<<5) /* Data Carrier Detect Input */ 55 #define USR2_RTSF (1<<4) /* RTS transition */ 56 #define USR2_TXDC (1<<3) /* Transmission complete */ 57 #define USR2_BRCD (1<<2) /* Break condition detected */ 58 #define USR2_ORE (1<<1) /* Overrun error */ 59 #define USR2_RDR (1<<0) /* Receive data ready */ 60 61 #define UCR1_TRDYEN (1<<13) /* Tx Ready Interrupt Enable */ 62 #define UCR1_RRDYEN (1<<9) /* Rx Ready Interrupt Enable */ 63 #define UCR1_TXMPTYEN (1<<6) /* Tx Empty Interrupt Enable */ 64 #define UCR1_UARTEN (1<<0) /* UART Enable */ 65 66 #define UCR2_TXEN (1<<2) /* Transmitter enable */ 67 #define UCR2_RXEN (1<<1) /* Receiver enable */ 68 #define UCR2_SRST (1<<0) /* Reset complete */ 69 70 #define UTS1_TXEMPTY (1<<6) 71 #define UTS1_RXEMPTY (1<<5) 72 #define UTS1_TXFULL (1<<4) 73 #define UTS1_RXFULL (1<<3) 74 75 typedef struct IMXSerialState { 76 /*< private >*/ 77 SysBusDevice parent_obj; 78 79 /*< public >*/ 80 MemoryRegion iomem; 81 int32_t readbuff; 82 83 uint32_t usr1; 84 uint32_t usr2; 85 uint32_t ucr1; 86 uint32_t ucr2; 87 uint32_t uts1; 88 89 /* 90 * The registers below are implemented just so that the 91 * guest OS sees what it has written 92 */ 93 uint32_t onems; 94 uint32_t ufcr; 95 uint32_t ubmr; 96 uint32_t ubrc; 97 uint32_t ucr3; 98 99 qemu_irq irq; 100 CharBackend chr; 101 } IMXSerialState; 102 103 #endif 104