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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fa3218d859
Currently early kernel messages, i.e., those from uncompression, go to the debugging UART. And if it is enabled in the platform configuration, but not initialized by the bootloader, the machine hangs, waiting for UART status change. Besides, having those messages on another UART - typically the console UART - may be preferrable. This patch allows selecting the UART in kernel configuration. Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
128 lines
5.9 KiB
C
128 lines
5.9 KiB
C
/*
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* include/linux/atmel_serial.h
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*
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* Copyright (C) 2005 Ivan Kokshaysky
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* Copyright (C) SAN People
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*
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* USART registers.
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* Based on AT91RM9200 datasheet revision E.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef ATMEL_SERIAL_H
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#define ATMEL_SERIAL_H
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#define ATMEL_US_CR 0x00 /* Control Register */
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#define ATMEL_US_RSTRX (1 << 2) /* Reset Receiver */
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#define ATMEL_US_RSTTX (1 << 3) /* Reset Transmitter */
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#define ATMEL_US_RXEN (1 << 4) /* Receiver Enable */
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#define ATMEL_US_RXDIS (1 << 5) /* Receiver Disable */
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#define ATMEL_US_TXEN (1 << 6) /* Transmitter Enable */
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#define ATMEL_US_TXDIS (1 << 7) /* Transmitter Disable */
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#define ATMEL_US_RSTSTA (1 << 8) /* Reset Status Bits */
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#define ATMEL_US_STTBRK (1 << 9) /* Start Break */
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#define ATMEL_US_STPBRK (1 << 10) /* Stop Break */
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#define ATMEL_US_STTTO (1 << 11) /* Start Time-out */
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#define ATMEL_US_SENDA (1 << 12) /* Send Address */
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#define ATMEL_US_RSTIT (1 << 13) /* Reset Iterations */
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#define ATMEL_US_RSTNACK (1 << 14) /* Reset Non Acknowledge */
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#define ATMEL_US_RETTO (1 << 15) /* Rearm Time-out */
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#define ATMEL_US_DTREN (1 << 16) /* Data Terminal Ready Enable [AT91RM9200 only] */
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#define ATMEL_US_DTRDIS (1 << 17) /* Data Terminal Ready Disable [AT91RM9200 only] */
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#define ATMEL_US_RTSEN (1 << 18) /* Request To Send Enable */
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#define ATMEL_US_RTSDIS (1 << 19) /* Request To Send Disable */
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#define ATMEL_US_MR 0x04 /* Mode Register */
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#define ATMEL_US_USMODE (0xf << 0) /* Mode of the USART */
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#define ATMEL_US_USMODE_NORMAL 0
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#define ATMEL_US_USMODE_RS485 1
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#define ATMEL_US_USMODE_HWHS 2
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#define ATMEL_US_USMODE_MODEM 3
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#define ATMEL_US_USMODE_ISO7816_T0 4
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#define ATMEL_US_USMODE_ISO7816_T1 6
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#define ATMEL_US_USMODE_IRDA 8
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#define ATMEL_US_USCLKS (3 << 4) /* Clock Selection */
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#define ATMEL_US_USCLKS_MCK (0 << 4)
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#define ATMEL_US_USCLKS_MCK_DIV8 (1 << 4)
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#define ATMEL_US_USCLKS_SCK (3 << 4)
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#define ATMEL_US_CHRL (3 << 6) /* Character Length */
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#define ATMEL_US_CHRL_5 (0 << 6)
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#define ATMEL_US_CHRL_6 (1 << 6)
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#define ATMEL_US_CHRL_7 (2 << 6)
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#define ATMEL_US_CHRL_8 (3 << 6)
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#define ATMEL_US_SYNC (1 << 8) /* Synchronous Mode Select */
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#define ATMEL_US_PAR (7 << 9) /* Parity Type */
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#define ATMEL_US_PAR_EVEN (0 << 9)
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#define ATMEL_US_PAR_ODD (1 << 9)
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#define ATMEL_US_PAR_SPACE (2 << 9)
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#define ATMEL_US_PAR_MARK (3 << 9)
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#define ATMEL_US_PAR_NONE (4 << 9)
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#define ATMEL_US_PAR_MULTI_DROP (6 << 9)
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#define ATMEL_US_NBSTOP (3 << 12) /* Number of Stop Bits */
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#define ATMEL_US_NBSTOP_1 (0 << 12)
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#define ATMEL_US_NBSTOP_1_5 (1 << 12)
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#define ATMEL_US_NBSTOP_2 (2 << 12)
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#define ATMEL_US_CHMODE (3 << 14) /* Channel Mode */
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#define ATMEL_US_CHMODE_NORMAL (0 << 14)
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#define ATMEL_US_CHMODE_ECHO (1 << 14)
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#define ATMEL_US_CHMODE_LOC_LOOP (2 << 14)
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#define ATMEL_US_CHMODE_REM_LOOP (3 << 14)
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#define ATMEL_US_MSBF (1 << 16) /* Bit Order */
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#define ATMEL_US_MODE9 (1 << 17) /* 9-bit Character Length */
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#define ATMEL_US_CLKO (1 << 18) /* Clock Output Select */
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#define ATMEL_US_OVER (1 << 19) /* Oversampling Mode */
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#define ATMEL_US_INACK (1 << 20) /* Inhibit Non Acknowledge */
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#define ATMEL_US_DSNACK (1 << 21) /* Disable Successive NACK */
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#define ATMEL_US_MAX_ITER (7 << 24) /* Max Iterations */
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#define ATMEL_US_FILTER (1 << 28) /* Infrared Receive Line Filter */
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#define ATMEL_US_IER 0x08 /* Interrupt Enable Register */
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#define ATMEL_US_RXRDY (1 << 0) /* Receiver Ready */
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#define ATMEL_US_TXRDY (1 << 1) /* Transmitter Ready */
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#define ATMEL_US_RXBRK (1 << 2) /* Break Received / End of Break */
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#define ATMEL_US_ENDRX (1 << 3) /* End of Receiver Transfer */
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#define ATMEL_US_ENDTX (1 << 4) /* End of Transmitter Transfer */
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#define ATMEL_US_OVRE (1 << 5) /* Overrun Error */
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#define ATMEL_US_FRAME (1 << 6) /* Framing Error */
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#define ATMEL_US_PARE (1 << 7) /* Parity Error */
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#define ATMEL_US_TIMEOUT (1 << 8) /* Receiver Time-out */
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#define ATMEL_US_TXEMPTY (1 << 9) /* Transmitter Empty */
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#define ATMEL_US_ITERATION (1 << 10) /* Max number of Repetitions Reached */
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#define ATMEL_US_TXBUFE (1 << 11) /* Transmission Buffer Empty */
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#define ATMEL_US_RXBUFF (1 << 12) /* Reception Buffer Full */
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#define ATMEL_US_NACK (1 << 13) /* Non Acknowledge */
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#define ATMEL_US_RIIC (1 << 16) /* Ring Indicator Input Change [AT91RM9200 only] */
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#define ATMEL_US_DSRIC (1 << 17) /* Data Set Ready Input Change [AT91RM9200 only] */
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#define ATMEL_US_DCDIC (1 << 18) /* Data Carrier Detect Input Change [AT91RM9200 only] */
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#define ATMEL_US_CTSIC (1 << 19) /* Clear to Send Input Change */
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#define ATMEL_US_RI (1 << 20) /* RI */
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#define ATMEL_US_DSR (1 << 21) /* DSR */
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#define ATMEL_US_DCD (1 << 22) /* DCD */
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#define ATMEL_US_CTS (1 << 23) /* CTS */
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#define ATMEL_US_IDR 0x0c /* Interrupt Disable Register */
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#define ATMEL_US_IMR 0x10 /* Interrupt Mask Register */
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#define ATMEL_US_CSR 0x14 /* Channel Status Register */
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#define ATMEL_US_RHR 0x18 /* Receiver Holding Register */
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#define ATMEL_US_THR 0x1c /* Transmitter Holding Register */
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#define ATMEL_US_SYNH (1 << 15) /* Transmit/Receive Sync [AT91SAM9261 only] */
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#define ATMEL_US_BRGR 0x20 /* Baud Rate Generator Register */
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#define ATMEL_US_CD (0xffff << 0) /* Clock Divider */
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#define ATMEL_US_RTOR 0x24 /* Receiver Time-out Register */
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#define ATMEL_US_TO (0xffff << 0) /* Time-out Value */
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#define ATMEL_US_TTGR 0x28 /* Transmitter Timeguard Register */
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#define ATMEL_US_TG (0xff << 0) /* Timeguard Value */
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#define ATMEL_US_FIDI 0x40 /* FI DI Ratio Register */
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#define ATMEL_US_NER 0x44 /* Number of Errors Register */
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#define ATMEL_US_IF 0x4c /* IrDA Filter Register */
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#endif
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