sys/arch/arm/at91/at91usartvar.h

   1 /*      $NetBSD: at91usartvar.h,v 1.2 2008/07/03 01:15:39 matt Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2007 Embedtronics Oy. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  */
  28
  29 #ifndef _AT91USARTVAR_H_
  30 #define _AT91USARTVAR_H_
  31
  32 #include <sys/tty.h>
  33 #include <arm/at91/at91pdcvar.h>
  34
  35 /* Hardware flag masks */
  36 #define COM_HW_NOIEN            0x01
  37 #define COM_HW_DEV_OK           0x20
  38 #define COM_HW_CONSOLE          0x40
  39 #define COM_HW_KGDB             0x80
  40
  41 #define RX_TTY_BLOCKED          0x01
  42 #define RX_TTY_OVERFLOWED       0x02
  43 #define RX_IBUF_BLOCKED         0x04
  44 #define RX_IBUF_OVERFLOWED      0x08
  45 #define RX_ANY_BLOCK            0x0f
  46
  47 #define AT91USART_RING_SIZE     MAX(PAGE_SIZE, 2048)
  48
  49 struct at91usart_softc {
  50         device_t                sc_dev;
  51         bus_addr_t              sc_hwbase;
  52         bus_space_tag_t         sc_iot;
  53         bus_space_handle_t      sc_ioh;
  54         bus_dma_tag_t           sc_dmat;
  55         int                     sc_pid;
  56
  57         /* hardware flow control callbacks: */
  58         void                    (*hwflow)(struct at91usart_softc *, int enabled);
  59         void                    (*start_tx)(struct at91usart_softc *sc);
  60         void                    (*stop_tx)(struct at91usart_softc *sc);
  61         void                    (*rx_started)(struct at91usart_softc *sc);
  62         void                    (*rx_stopped)(struct at91usart_softc *sc);
  63         void                    (*rx_rts_ctl)(struct at91usart_softc *sc, int enabled);
  64
  65         at91pdc_fifo_t          sc_rx_fifo;
  66         at91pdc_fifo_t          sc_tx_fifo;
  67
  68         u_char                  *sc_tba;
  69         int                     sc_tbc;
  70
  71         void                    *sc_si;
  72
  73         struct tty              *sc_tty;
  74
  75         /* status flags */
  76         int                     sc_hwflags, sc_swflags;
  77
  78         volatile u_int          sc_rx_flags,
  79                                 sc_rx_ready;
  80
  81         volatile u_int          sc_csr, sc_brgr, sc_ier, sc_poll;
  82
  83         /* power management hooks */
  84         int                     (*enable)(struct at91usart_softc *);
  85         int                     (*disable)(struct at91usart_softc *);
  86
  87         int                     enabled;
  88 #if NRND > 0 && defined(RND_COM)
  89         rndsource_element_t  rnd_source;
  90 #endif
  91 };
  92
  93 struct at91bus_attach_args;
  94 void    at91usart_attach_subr(struct at91usart_softc *, struct at91bus_attach_args *);
  95 int     at91usart_cn_attach(bus_space_tag_t, bus_addr_t, bus_space_handle_t, u_int32_t mstclk, int, tcflag_t);
  96
  97 #endif /* _AT91USARTVAR_H_ */