target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_uart.h

   1 /*
   2  *  ADM5120 UART definitions
   3  *
   4  *  This header file defines the hardware registers of the ADM5120 SoC
   5  *  built-in UARTs.
   6  *
   7  *  Copyright (C) 2007 OpenWrt.org
   8  *  Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License version 2 as published
  12  *  by the Free Software Foundation.
  13  *
  14  */
  15
  16 #ifndef _ADM5120_UART_H_
  17 #define _ADM5120_UART_H_
  18
  19 #define UART_BAUDDIV(clk, baud) ((clk/(16 * (baud)))-1)
  20
  21 #define UART_REG_DATA   0x00
  22 #define UART_REG_RSR    0x04
  23 #define UART_REG_ECR    UART_REG_RSR
  24 #define UART_REG_LCRH   0x08
  25 #define UART_REG_LCRM   0x0C
  26 #define UART_REG_LCRL   0x10
  27 #define UART_REG_CTRL   0x14
  28 #define UART_REG_FLAG   0x18
  29
  30 /* Receive Status Register bits */
  31 #define UART_RSR_FE     ( 1 << 0 )
  32 #define UART_RSR_PE     ( 1 << 1 )
  33 #define UART_RSR_BE     ( 1 << 2 )
  34 #define UART_RSR_OE     ( 1 << 3 )
  35 #define UART_RSR_ERR    ( UART_RSR_FE | UART_RSR_PE | UART_RSR_BE )
  36
  37 #define UART_ECR_ALL    0xFF
  38
  39 /* Line Control High register bits */
  40 #define UART_LCRH_BRK   ( 1 << 0 ) /* send break */
  41 #define UART_LCRH_PEN   ( 1 << 1 ) /* parity enable */
  42 #define UART_LCRH_EPS   ( 1 << 2 ) /* even parity select */
  43 #define UART_LCRH_STP1  ( 0 << 3 ) /* one stop bits select */
  44 #define UART_LCRH_STP2  ( 1 << 3 ) /* two stop bits select */
  45 #define UART_LCRH_FEN   ( 1 << 4 ) /* FIFO enable */
  46
  47 #define UART_LCRH_WLEN5 ( 0 << 5 )
  48 #define UART_LCRH_WLEN6 ( 1 << 5 )
  49 #define UART_LCRH_WLEN7 ( 2 << 5 )
  50 #define UART_LCRH_WLEN8 ( 3 << 5 )
  51
  52 /* Control register bits */
  53 #define UART_CTRL_EN    ( 1 << 0 )
  54
  55 /* Flag register bits */
  56 #define UART_FLAG_CTS   ( 1 << 0 )
  57 #define UART_FLAG_DSR   ( 1 << 1 )
  58 #define UART_FLAG_DCD   ( 1 << 2 )
  59 #define UART_FLAG_BUSY  ( 1 << 3 )
  60 #define UART_FLAG_RXFE  ( 1 << 4 )
  61 #define UART_FLAG_TXFF  ( 1 << 5 )
  62 #define UART_FLAG_RXFF  ( 1 << 6 )
  63 #define UART_FLAG_TXFE  ( 1 << 7 )
  64
  65 #endif /* _ADM5120_UART_H_ */