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at91usartvar.h revision 1.3 
      1 /*      $NetBSD: at91usartvar.h,v 1.3 2009/10/23 06:53:13 snj 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_ */
     98