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      1 /*      $NetBSD: at91usartvar.h,v 1.7 2015/04/14 20:32:35 riastradh 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 #ifdef RND_COM
     35 #include <sys/rndsource.h>
     36 #endif
     37 
     38 /* Hardware flag masks */
     39 #define COM_HW_NOIEN		0x01
     40 #define COM_HW_DEV_OK		0x20
     41 #define COM_HW_CONSOLE		0x40
     42 #define COM_HW_KGDB		0x80
     43 
     44 #define RX_TTY_BLOCKED		0x01
     45 #define RX_TTY_OVERFLOWED	0x02
     46 #define RX_IBUF_BLOCKED		0x04
     47 #define RX_IBUF_OVERFLOWED	0x08
     48 #define RX_ANY_BLOCK		0x0f
     49 
     50 #define AT91USART_RING_SIZE	MAX(PAGE_SIZE, 2048)
     51 
     52 struct at91usart_softc {
     53 	device_t		sc_dev;
     54 	bus_addr_t		sc_hwbase;
     55 	bus_space_tag_t		sc_iot;
     56 	bus_space_handle_t 	sc_ioh;
     57 	bus_dma_tag_t		sc_dmat;
     58 	int			sc_pid;
     59 
     60 	/* hardware flow control callbacks: */
     61 	void			(*hwflow)(struct at91usart_softc *, int enabled);
     62 	void			(*start_tx)(struct at91usart_softc *sc);
     63 	void			(*stop_tx)(struct at91usart_softc *sc);
     64 	void			(*rx_started)(struct at91usart_softc *sc);
     65 	void			(*rx_stopped)(struct at91usart_softc *sc);
     66 	void			(*rx_rts_ctl)(struct at91usart_softc *sc, int enabled);
     67 
     68 	at91pdc_fifo_t		sc_rx_fifo;
     69 	at91pdc_fifo_t		sc_tx_fifo;
     70 
     71 	u_char			*sc_tba;
     72 	int			sc_tbc;
     73 
     74 	void			*sc_si;
     75 
     76 	struct tty		*sc_tty;
     77 
     78 	/* status flags */
     79 	int			sc_hwflags, sc_swflags;
     80 
     81 	volatile u_int		sc_rx_flags,
     82 				sc_rx_ready;
     83 
     84 	volatile u_int		sc_csr, sc_brgr, sc_ier, sc_poll;
     85 
     86 	/* power management hooks */
     87 	int			(*enable)(struct at91usart_softc *);
     88 	int			(*disable)(struct at91usart_softc *);
     89 
     90 	int			enabled;
     91 #ifdef RND_COM
     92 	krndsource_t  rnd_source;
     93 #endif
     94 };
     95 
     96 struct at91bus_attach_args;
     97 void	at91usart_attach_subr(struct at91usart_softc *, struct at91bus_attach_args *);
     98 int	at91usart_cn_attach(bus_space_tag_t, bus_addr_t, bus_space_handle_t, uint32_t mstclk, int, tcflag_t);
     99 
    100 #endif /* _AT91USARTVAR_H_ */
    101