target/linux/adm5120/files/arch/mips/include/asm/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 Gabor Juhos <juhosg@openwrt.org>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  *
  13  */
  14
  15 #ifndef _MACH_ADM5120_UART_H
  16 #define _MACH_ADM5120_UART_H
  17
  18 #define UART_BAUDDIV(clk, baud) ((clk/(16 * (baud)))-1)
  19
  20 #define UART_REG_DATA   0x00
  21 #define UART_REG_RSR    0x04
  22 #define UART_REG_ECR    UART_REG_RSR
  23 #define UART_REG_LCRH   0x08
  24 #define UART_REG_LCRM   0x0C
  25 #define UART_REG_LCRL   0x10
  26 #define UART_REG_CTRL   0x14
  27 #define UART_REG_FLAG   0x18
  28
  29 /* Receive Status Register bits */
  30 #define UART_RSR_FE     (1 << 0)
  31 #define UART_RSR_PE     (1 << 1)
  32 #define UART_RSR_BE     (1 << 2)
  33 #define UART_RSR_OE     (1 << 3)
  34 #define UART_RSR_ERR    (UART_RSR_FE | UART_RSR_PE | UART_RSR_BE)
  35
  36 #define UART_ECR_ALL    0xFF
  37
  38 /* Line Control High register bits */
  39 #define UART_LCRH_BRK   (1 << 0) /* send break */
  40 #define UART_LCRH_PEN   (1 << 1) /* parity enable */
  41 #define UART_LCRH_EPS   (1 << 2) /* even parity select */
  42 #define UART_LCRH_STP1  (0 << 3) /* one stop bits select */
  43 #define UART_LCRH_STP2  (1 << 3) /* two stop bits select */
  44 #define UART_LCRH_FEN   (1 << 4) /* FIFO enable */
  45
  46 #define UART_LCRH_WLEN5 (0 << 5)
  47 #define UART_LCRH_WLEN6 (1 << 5)
  48 #define UART_LCRH_WLEN7 (2 << 5)
  49 #define UART_LCRH_WLEN8 (3 << 5)
  50
  51 /* Control register bits */
  52 #define UART_CTRL_EN    (1 << 0)
  53
  54 /* Flag register bits */
  55 #define UART_FLAG_CTS   (1 << 0)
  56 #define UART_FLAG_DSR   (1 << 1)
  57 #define UART_FLAG_DCD   (1 << 2)
  58 #define UART_FLAG_BUSY  (1 << 3)
  59 #define UART_FLAG_RXFE  (1 << 4)
  60 #define UART_FLAG_TXFF  (1 << 5)
  61 #define UART_FLAG_RXFF  (1 << 6)
  62 #define UART_FLAG_TXFE  (1 << 7)
  63
  64 #endif /* _MACH_ADM5120_UART_H */