upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/include/asm-blackfin/arch-bf537/bf537_serial.h

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/*
* U-boot bf537_serial.h
*
* Copyright (c) 2005-2007 Analog Devices Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef _BF537_SERIAL_H_
#define _BF537_SERIAL_H_
#define BYTE_REF(addr) (*((volatile char*)addr))
#define HALFWORD_REF(addr) (*((volatile short*)addr))
#define WORD_REF(addr) (*((volatile long*)addr))
#define UART_THR_LO HALFWORD_REF(UART_THR)
#define UART_RBR_LO HALFWORD_REF(UART_RBR)
#define UART_DLL_LO HALFWORD_REF(UART_DLL)
#define UART_IER_LO HALFWORD_REF(UART_IER)
#define UART_IER_ERBFI 0x01
#define UART_IER_ETBEI 0x02
#define UART_IER_ELSI 0x04
#define UART_IER_EDDSI 0x08
#define UART_DLH_LO HALFWORD_REF(UART_DLH)
#define UART_IIR_LO HALFWORD_REF(UART_IIR)
#define UART_IIR_NOINT 0x01
#define UART_IIR_STATUS 0x06
#define UART_IIR_LSR 0x06
#define UART_IIR_RBR 0x04
#define UART_IIR_THR 0x02
#define UART_IIR_MSR 0x00
#define UART_LCR_LO HALFWORD_REF(UART_LCR)
#define UART_LCR_WLS5 0
#define UART_LCR_WLS6 0x01
#define UART_LCR_WLS7 0x02
#define UART_LCR_WLS8 0x03
#define UART_LCR_STB 0x04
#define UART_LCR_PEN 0x08
#define UART_LCR_EPS 0x10
#define UART_LCR_SP 0x20
#define UART_LCR_SB 0x40
#define UART_LCR_DLAB 0x80
#define UART_MCR_LO HALFWORD_REF(UART_MCR)
#define UART_LSR_LO HALFWORD_REF(UART_LSR)
#define UART_LSR_DR 0x01
#define UART_LSR_OE 0x02
#define UART_LSR_PE 0x04
#define UART_LSR_FE 0x08
#define UART_LSR_BI 0x10
#define UART_LSR_THRE 0x20
#define UART_LSR_TEMT 0x40
#define UART_MSR_LO HALFWORD_REF(UART_MSR)
#define UART_SCR_LO HALFWORD_REF(UART_SCR)
#define UART_GCTL_LO HALFWORD_REF(UART_GCTL)
#define UART_GCTL_UCEN 0x01
#endif