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