linux-imx

/*

 * The DSP56001 Device Driver, saviour of the Free World(tm)

 *

 * Authors: Fredrik Noring   <noring@nocrew.org>

 *          lars brinkhoff   <lars@nocrew.org>

 *          Tomas Berndtsson <tomas@nocrew.org>

 *

 * First version May 1996

 *

 * History:

 *  97-01-29   Tomas Berndtsson,

 *               Integrated with Linux 2.1.21 kernel sources.

 *  97-02-15   Tomas Berndtsson,

 *               Fixed for kernel 2.1.26

 *

 * BUGS:

 *  Hmm... there must be something here :)

 *

 * Copyright (C) 1996,1997 Fredrik Noring, lars brinkhoff & Tomas Berndtsson

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file COPYING in the main directory of this archive

 * for more details.

 */

​

#include <linux/module.h>

#include <linux/major.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/delay.h>    /* guess what */

#include <linux/fs.h>

#include <linux/mm.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/mutex.h>

#include <linux/firmware.h>

#include <linux/platform_device.h>

#include <linux/uaccess.h>  /* For put_user and get_user */

​

#include <asm/atarihw.h>

#include <asm/traps.h>

​

#include <asm/dsp56k.h>

​

/* minor devices */

#define DSP56K_DEV_56001        0    /* The only device so far */

​

#define TIMEOUT    10   /* Host port timeout in number of tries */

#define MAXIO    2048   /* Maximum number of words before sleep */

#define DSP56K_MAX_BINARY_LENGTH (3*64*1024)

​

#define DSP56K_TX_INT_ON    dsp56k_host_interface.icr |=  DSP56K_ICR_TREQ

#define DSP56K_RX_INT_ON    dsp56k_host_interface.icr |=  DSP56K_ICR_RREQ

#define DSP56K_TX_INT_OFF   dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ

#define DSP56K_RX_INT_OFF   dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ

​

#define DSP56K_TRANSMIT     (dsp56k_host_interface.isr & DSP56K_ISR_TXDE)

#define DSP56K_RECEIVE      (dsp56k_host_interface.isr & DSP56K_ISR_RXDF)

​

#define handshake(count, maxio, timeout, ENABLE, f) \

{ \

    long i, t, m; \

    while (count > 0) { \