sccnxp.h

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/*
 *  NXP (Philips) SCC+++(SCN+++) serial driver
 *
 *  Copyright (C) 2012 Alexander Shiyan <[email protected]>
 *
 *  Based on sc26xx.c, by Thomas Bogendörfer ([email protected])
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 */

#ifndef __SCCNXP_H
#define __SCCNXP_H

#define SCCNXP_MAX_UARTS    2

/* Output lines */
#define LINE_OP0        1
#define LINE_OP1        2
#define LINE_OP2        3
#define LINE_OP3        4
#define LINE_OP4        5
#define LINE_OP5        6
#define LINE_OP6        7
#define LINE_OP7        8

/* Input lines */
#define LINE_IP0        9
#define LINE_IP1        10
#define LINE_IP2        11
#define LINE_IP3        12
#define LINE_IP4        13
#define LINE_IP5        14
#define LINE_IP6        15

/* Signals */
#define DTR_OP          0   /* DTR */
#define RTS_OP          4   /* RTS */
#define DSR_IP          8   /* DSR */
#define CTS_IP          12  /* CTS */
#define DCD_IP          16  /* DCD */
#define RNG_IP          20  /* RNG */

#define DIR_OP          24  /* Special signal for control RS-485.
                     * Goes high when transmit,
                     * then goes low.
                     */

/* Routing control signal 'sig' to line 'line' */
#define MCTRL_SIG(sig, line)    ((line) << (sig))

/*
 * Example board initialization data:
 *
 * static struct resource sc2892_resources[] = {
 *  DEFINE_RES_MEM(UART_PHYS_START, 0x10),
 *  DEFINE_RES_IRQ(IRQ_EXT2),
 * };
 *
 * static struct sccnxp_pdata sc2892_info = {
 *  .frequency  = 3686400,
 *  .mctrl_cfg[0]   = MCTRL_SIG(DIR_OP, LINE_OP0),
 *  .mctrl_cfg[1]   = MCTRL_SIG(DIR_OP, LINE_OP1),
 * };
 *
 * static struct platform_device sc2892 = {
 *  .name       = "sc2892",
 *  .id     = -1,
 *  .resource   = sc2892_resources,
 *  .num_resources  = ARRAY_SIZE(sc2892_resources),
 *  .dev = {
 *      .platform_data  = &sc2892_info,
 *  },
 * };
 */

/* SCCNXP platform data structure */
struct sccnxp_pdata {
    /* Frequency (extrenal clock or crystal) */
    int         frequency;
    /* Shift for A0 line */
    const u8        reg_shift;
    /* Modem control lines configuration */
    const u32       mctrl_cfg[SCCNXP_MAX_UARTS];
    /* Called during startup */
    void (*init)(void);
    /* Called before finish */
    void (*exit)(void);
};

#endif