linux-imx

/*

 * omap_cf.c -- OMAP 16xx CompactFlash controller driver

 *

 * Copyright (c) 2005 David Brownell

 *

 * 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.

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/slab.h>

​

#include <pcmcia/ss.h>

​

#include <mach/hardware.h>

#include <asm/io.h>

#include <asm/sizes.h>

​

#include <mach/mux.h>

#include <mach/tc.h>

​

​

/* NOTE:  don't expect this to support many I/O cards.  The 16xx chips have

 * hard-wired timings to support Compact Flash memory cards; they won't work

 * with various other devices (like WLAN adapters) without some external

 * logic to help out.

 *

 * NOTE:  CF controller docs disagree with address space docs as to where

 * CF_BASE really lives; this is a doc erratum.

 */

#define CF_BASE 0xfffe2800

​

/* status; read after IRQ */

#define CF_STATUS           (CF_BASE + 0x00)

#   define  CF_STATUS_BAD_READ  (1 << 2)

#   define  CF_STATUS_BAD_WRITE (1 << 1)

#   define  CF_STATUS_CARD_DETECT   (1 << 0)

​

/* which chipselect (CS0..CS3) is used for CF (active low) */

#define CF_CFG              (CF_BASE + 0x02)

​

/* card reset */

#define CF_CONTROL          (CF_BASE + 0x04)

#   define  CF_CONTROL_RESET    (1 << 0)

​

#define omap_cf_present() (!(omap_readw(CF_STATUS) & CF_STATUS_CARD_DETECT))

​

/*--------------------------------------------------------------------------*/

​

static const char driver_name[] = "omap_cf";

​

struct omap_cf_socket {

    struct pcmcia_socket    socket;

​

    struct timer_list   timer;