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drasko |
/*
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* OMAP UART Generic driver implementation.
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*
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* Copyright (C) 2007 Bahadir Balban
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*
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* The particular intention of this code is that it has been carefully written
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* as decoupled from os-specific code and in a verbose way such that it clearly
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* demonstrates how the device operates, reducing the amount of time to be spent
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* for understanding the operational model and implementing a driver from
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* scratch. This is the very first to be such a driver so far, hopefully it will
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* turn out to be useful.
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*/
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#ifndef __OMAP_UART_H__
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#define __OMAP_UART_H__
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#include INC_PLAT(uart.h)
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#include INC_ARCH(io.h)
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/* Register offsets */
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#define OMAP_UART_DLL 0x00
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#define OMAP_UART_THR 0x00
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#define OMAP_UART_RHR 0x00
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#define OMAP_UART_DLH 0x04
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#define OMAP_UART_IER 0x04
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#define OMAP_UART_FCR 0x08
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#define OMAP_UART_MCR 0x10
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#define OMAP_UART_LSR 0x14
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#define OMAP_UART_MDR1 0x20
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#define OMAP_UART_LCR 0x0C
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/* Modes supported by OMAP UART/IRDA/CIR IP */
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#define OMAP_UART_MODE_UART16X 0x0
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#define OMAP_UART_MODE_SIR 0x1
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#define OMAP_UART_MODE_UART16X_AUTO_BAUD 0x2
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#define OMAP_UART_MODE_UART13X 0x3
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#define OMAP_UART_MODE_MIR 0x4
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#define OMAP_UART_MODE_FIR 0x5
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#define OMAP_UART_MODE_CIR 0x6
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#define OMAP_UART_MODE_DEFAULT 0x7 /* Disable */
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/* Number of data bits for UART */
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#define OMAP_UART_DATA_BITS_5 0x0
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#define OMAP_UART_DATA_BITS_6 0x1
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#define OMAP_UART_DATA_BITS_7 0x2
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#define OMAP_UART_DATA_BITS_8 0x3
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/* Stop bits to be used for UART data */
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#define OMAP_UART_STOP_BITS_1 0x0
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#define OMAP_UART_STOP_BITS_1_5 0x1
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/* Banked Register modes- ConfigA, ConfigB, Operational */
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#define OMAP_UART_BANKED_MODE_OPERATIONAL 0x00
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#define OMAP_UART_BANKED_MODE_CONFIG_A 0x80
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#define OMAP_UART_BANKED_MODE_CONFIG_B 0xBF
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void uart_tx_char(unsigned long base, char c);
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char uart_rx_char(unsigned long uart_base);
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void uart_set_baudrate(unsigned long uart_base, u32 baudrate, u32 clkrate);
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void uart_init(unsigned long uart_base);
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#endif /* __OMAP_UART_H__ */
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