127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
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/* MN10300 On-chip serial port driver definitions
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _MN10300_SERIAL_H
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#define _MN10300_SERIAL_H
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#ifndef __ASSEMBLY__
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#include <linux/serial_core.h>
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#include <linux/termios.h>
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#endif
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#include <asm/page.h>
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#include <asm/serial-regs.h>
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#define NR_PORTS 3 /* should be set 3 or 9 or 16 */
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#define MNSC_BUFFER_SIZE +(PAGE_SIZE / 2)
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/* intr_flags bits */
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#define MNSCx_RX_AVAIL 0x01
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#define MNSCx_RX_OVERF 0x02
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#define MNSCx_TX_SPACE 0x04
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#define MNSCx_TX_EMPTY 0x08
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#ifndef __ASSEMBLY__
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struct mn10300_serial_port {
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char *rx_buffer; /* reception buffer base */
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unsigned rx_inp; /* pointer to rx input offset */
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unsigned rx_outp; /* pointer to rx output offset */
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u8 tx_xchar; /* high-priority XON/XOFF buffer */
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u8 tx_break; /* transmit break request */
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u8 intr_flags; /* interrupt flags */
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volatile u16 *rx_icr; /* Rx interrupt control register */
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volatile u16 *tx_icr; /* Tx interrupt control register */
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int rx_irq; /* reception IRQ */
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int tx_irq; /* transmission IRQ */
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int tm_irq; /* timer IRQ */
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const char *name; /* name of serial port */
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const char *rx_name; /* Rx interrupt handler name of serial port */
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const char *tx_name; /* Tx interrupt handler name of serial port */
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const char *tm_name; /* Timer interrupt handler name */
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unsigned short type; /* type of serial port */
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unsigned char isconsole; /* T if it's a console */
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volatile void *_iobase; /* pointer to base of I/O control regs */
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volatile u16 *_control; /* control register pointer */
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volatile u8 *_status; /* status register pointer */
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volatile u8 *_intr; /* interrupt register pointer */
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volatile void *_rxb; /* receive buffer register pointer */
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volatile void *_txb; /* transmit buffer register pointer */
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volatile u16 *_tmicr; /* timer interrupt control register */
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volatile u8 *_tmxmd; /* baud rate timer mode register */
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volatile u16 *_tmxbr; /* baud rate timer base register */
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/* this must come down here so that assembly can use BSET to access the
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* above fields */
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struct uart_port uart;
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unsigned short rx_brk; /* current break reception status */
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u16 tx_cts; /* current CTS status */
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int gdbstub; /* preemptively stolen by GDB stub */
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u8 clock_src; /* clock source */
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#define MNSCx_CLOCK_SRC_IOCLK 0
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#define MNSCx_CLOCK_SRC_IOBCLK 1
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u8 div_timer; /* timer used as divisor */
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#define MNSCx_DIV_TIMER_16BIT 0
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#define MNSCx_DIV_TIMER_8BIT 1
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u16 options; /* options */
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#define MNSCx_OPT_CTS 0x0001
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unsigned long ioclk; /* base clock rate */
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};
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#ifdef CONFIG_MN10300_TTYSM0
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extern struct mn10300_serial_port mn10300_serial_port_sif0;
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#endif
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#ifdef CONFIG_MN10300_TTYSM1
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extern struct mn10300_serial_port mn10300_serial_port_sif1;
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#endif
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#ifdef CONFIG_MN10300_TTYSM2
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extern struct mn10300_serial_port mn10300_serial_port_sif2;
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#endif
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extern struct mn10300_serial_port *mn10300_serial_ports[];
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struct mn10300_serial_int {
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struct mn10300_serial_port *port;
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asmlinkage void (*vdma)(void);
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};
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extern struct mn10300_serial_int mn10300_serial_int_tbl[];
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extern asmlinkage void mn10300_serial_vdma_interrupt(void);
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extern asmlinkage void mn10300_serial_vdma_rx_handler(void);
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extern asmlinkage void mn10300_serial_vdma_tx_handler(void);
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#endif /* __ASSEMBLY__ */
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#if defined(CONFIG_GDBSTUB_ON_TTYSM0)
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#define SCgSTR SC0STR
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#define SCgRXB SC0RXB
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#define SCgRXIRQ SC0RXIRQ
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#elif defined(CONFIG_GDBSTUB_ON_TTYSM1)
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#define SCgSTR SC1STR
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#define SCgRXB SC1RXB
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#define SCgRXIRQ SC1RXIRQ
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#elif defined(CONFIG_GDBSTUB_ON_TTYSM2)
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#define SCgSTR SC2STR
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#define SCgRXB SC2RXB
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#define SCgRXIRQ SC2RXIRQ
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#endif
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#endif /* _MN10300_SERIAL_H */
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