LXR linux/arch/mn10300/kernel/mn10300-serial.h

   1/* MN10300 On-chip serial port driver definitions
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#ifndef _MN10300_SERIAL_H
  12#define _MN10300_SERIAL_H
  13
  14#ifndef __ASSEMBLY__
  15#include <linux/serial_core.h>
  16#include <linux/termios.h>
  17#endif
  18
  19#include <asm/page.h>
  20#include <asm/serial-regs.h>
  21
  22#define NR_PORTS                3               /* should be set 3 or 9 or 16 */
  23
  24#define MNSC_BUFFER_SIZE        +(PAGE_SIZE / 2)
  25
  26/* intr_flags bits */
  27#define MNSCx_RX_AVAIL          0x01
  28#define MNSCx_RX_OVERF          0x02
  29#define MNSCx_TX_SPACE          0x04
  30#define MNSCx_TX_EMPTY          0x08
  31
  32#ifndef __ASSEMBLY__
  33
  34struct mn10300_serial_port {
  35        char                    *rx_buffer;     /* reception buffer base */
  36        unsigned                rx_inp;         /* pointer to rx input offset */
  37        unsigned                rx_outp;        /* pointer to rx output offset */
  38        u8                      tx_xchar;       /* high-priority XON/XOFF buffer */
  39        u8                      tx_break;       /* transmit break request */
  40        u8                      intr_flags;     /* interrupt flags */
  41        volatile u16            *rx_icr;        /* Rx interrupt control register */
  42        volatile u16            *tx_icr;        /* Tx interrupt control register */
  43        int                     rx_irq;         /* reception IRQ */
  44        int                     tx_irq;         /* transmission IRQ */
  45        int                     tm_irq;         /* timer IRQ */
  46
  47        const char              *name;          /* name of serial port */
  48        const char              *rx_name;       /* Rx interrupt handler name of serial port */
  49        const char              *tx_name;       /* Tx interrupt handler name of serial port */
  50        const char              *tm_name;       /* Timer interrupt handler name */
  51        unsigned short          type;           /* type of serial port */
  52        unsigned char           isconsole;      /* T if it's a console */
  53        volatile void           *_iobase;       /* pointer to base of I/O control regs */
  54        volatile u16            *_control;      /* control register pointer */
  55        volatile u8             *_status;       /* status register pointer */
  56        volatile u8             *_intr;         /* interrupt register pointer */
  57        volatile void           *_rxb;          /* receive buffer register pointer */
  58        volatile void           *_txb;          /* transmit buffer register pointer */
  59        volatile u16            *_tmicr;        /* timer interrupt control register */
  60        volatile u8             *_tmxmd;        /* baud rate timer mode register */
  61        volatile u16            *_tmxbr;        /* baud rate timer base register */
  62
  63        /* this must come down here so that assembly can use BSET to access the
  64         * above fields */
  65        struct uart_port        uart;
  66
  67        unsigned short          rx_brk;         /* current break reception status */
  68        u16                     tx_cts;         /* current CTS status */
  69        int                     gdbstub;        /* preemptively stolen by GDB stub */
  70
  71        u8                      clock_src;      /* clock source */
  72#define MNSCx_CLOCK_SRC_IOCLK   0
  73#define MNSCx_CLOCK_SRC_IOBCLK  1
  74
  75        u8                      div_timer;      /* timer used as divisor */
  76#define MNSCx_DIV_TIMER_16BIT   0
  77#define MNSCx_DIV_TIMER_8BIT    1
  78
  79        u16                     options;        /* options */
  80#define MNSCx_OPT_CTS           0x0001
  81
  82        unsigned long           ioclk;          /* base clock rate */
  83};
  84
  85#ifdef CONFIG_MN10300_TTYSM0
  86extern struct mn10300_serial_port mn10300_serial_port_sif0;
  87#endif
  88
  89#ifdef CONFIG_MN10300_TTYSM1
  90extern struct mn10300_serial_port mn10300_serial_port_sif1;
  91#endif
  92
  93#ifdef CONFIG_MN10300_TTYSM2
  94extern struct mn10300_serial_port mn10300_serial_port_sif2;
  95#endif
  96
  97extern struct mn10300_serial_port *mn10300_serial_ports[];
  98
  99struct mn10300_serial_int {
 100        struct mn10300_serial_port *port;
 101        asmlinkage void (*vdma)(void);
 102};
 103
 104extern struct mn10300_serial_int mn10300_serial_int_tbl[];
 105
 106extern asmlinkage void mn10300_serial_vdma_interrupt(void);
 107extern asmlinkage void mn10300_serial_vdma_rx_handler(void);
 108extern asmlinkage void mn10300_serial_vdma_tx_handler(void);
 109
 110#endif /* __ASSEMBLY__ */
 111
 112#if defined(CONFIG_GDBSTUB_ON_TTYSM0)
 113#define SCgSTR SC0STR
 114#define SCgRXB SC0RXB
 115#define SCgRXIRQ SC0RXIRQ
 116#elif defined(CONFIG_GDBSTUB_ON_TTYSM1)
 117#define SCgSTR SC1STR
 118#define SCgRXB SC1RXB
 119#define SCgRXIRQ SC1RXIRQ
 120#elif defined(CONFIG_GDBSTUB_ON_TTYSM2)
 121#define SCgSTR SC2STR
 122#define SCgRXB SC2RXB
 123#define SCgRXIRQ SC2RXIRQ
 124#endif
 125
 126#endif /* _MN10300_SERIAL_H */
 127