path: root/drivers/pcmcia/m8xx_pcmcia.c

/*
 * m8xx_pcmcia.c - Linux PCMCIA socket driver for the mpc8xx series.
 *
 * (C) 1999-2000 Magnus Damm <damm@bitsmart.com>
 * (C) 2001-2002 Montavista Software, Inc.
 *     <mlocke@mvista.com>
 *
 * Support for two slots by Cyclades Corporation
 *     <oliver.kurth@cyclades.de>
 * Further fixes, v2.6 kernel port
 *     <marcelo.tosatti@cyclades.com>
 * 
 * Some fixes, additions (C) 2005 Montavista Software, Inc. 
 *     <vbordug@ru.mvista.com>
 *
 * "The ExCA standard specifies that socket controllers should provide
 * two IO and five memory windows per socket, which can be independently
 * configured and positioned in the host address space and mapped to
 * arbitrary segments of card address space. " - David A Hinds. 1999
 *
 * This controller does _not_ meet the ExCA standard.
 *
 * m8xx pcmcia controller brief info:
 * + 8 windows (attrib, mem, i/o)
 * + up to two slots (SLOT_A and SLOT_B)
 * + inputpins, outputpins, event and mask registers.
 * - no offset register. sigh.
 *
 * Because of the lacking offset register we must map the whole card.
 * We assign each memory window PCMCIA_MEM_WIN_SIZE address space.
 * Make sure there is (PCMCIA_MEM_WIN_SIZE * PCMCIA_MEM_WIN_NO
 * * PCMCIA_SOCKETS_NO) bytes at PCMCIA_MEM_WIN_BASE.
 * The i/o windows are dynamically allocated at PCMCIA_IO_WIN_BASE.
 * They are maximum 64KByte each...
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>

#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/system.h>

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/mpc8xx.h>
#include <asm/8xx_immap.h>
#include <asm/irq.h>

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/ss.h>

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0);
#define dprintk(args...) printk(KERN_DEBUG "m8xx_pcmcia: " args);
#else
#define dprintk(args...)
#endif

#define pcmcia_info(args...) printk(KERN_INFO "m8xx_pcmcia: "args)
#define pcmcia_error(args...) printk(KERN_ERR "m8xx_pcmcia: "args)

static const char *version = "Version 0.06, Aug 2005";
MODULE_LICENSE("Dual MPL/GPL");

#if !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B)

/* The RPX series use SLOT_B */
#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
#define CONFIG_PCMCIA_SLOT_B
#define CONFIG_BD_IS_MHZ
#endif

/* The ADS board use SLOT_A */
#ifdef CONFIG_ADS
#define CONFIG_PCMCIA_SLOT_A
#define CONFIG_BD_IS_MHZ
#endif

/* The FADS series are a mess */
#ifdef CONFIG_FADS
#if defined(CONFIG_MPC860T) || defined(CONFIG_MPC860) || defined(CONFIG_MPC821)
#define CONFIG_PCMCIA_SLOT_A
#else
#define CONFIG_PCMCIA_SLOT_B
#endif
#endif

#if defined(CONFIG_MPC885ADS)
#define CONFIG_PCMCIA_SLOT_A
#define PCMCIA_GLITCHY_CD
#endif

/* Cyclades ACS uses both slots */
#ifdef CONFIG_PRxK
#define CONFIG_PCMCIA_SLOT_A
#define CONFIG_PCMCIA_SLOT_B
#endif

#endif /* !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B) */

#if defined(CONFIG_PCMCIA_SLOT_A) && defined(CONFIG_PCMCIA_SLOT_B)

#define PCMCIA_SOCKETS_NO 2
/* We have only 8 windows, dualsocket support will be limited. */
#define PCMCIA_MEM_WIN_NO 2
#define PCMCIA_IO_WIN_NO  2
#define PCMCIA_SLOT_MSG "SLOT_A and SLOT_B"

#elif defined(CONFIG_PCMCIA_SLOT_A) || defined(CONFIG_PCMCIA_SLOT_B)

#define PCMCIA_SOCKETS_NO 1
/* full support for one slot */
#define PCMCIA_MEM_WIN_NO 5
#define PCMCIA_IO_WIN_NO  2

/* define _slot_ to be able to optimize macros */

#ifdef CONFIG_PCMCIA_SLOT_A
#define _slot_ 0
#define PCMCIA_SLOT_MSG "SLOT_A"
#else
#define _slot_ 1
#define PCMCIA_SLOT_MSG "SLOT_B"
#endif

#else
#error m8xx_pcmcia: Bad configuration!
#endif

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

#define PCMCIA_MEM_WIN_BASE 0xe0000000 /* base address for memory window 0   */
#define PCMCIA_MEM_WIN_SIZE 0x04000000 /* each memory window is 64 MByte     */
#define PCMCIA_IO_WIN_BASE  _IO_BASE   /* base address for io window 0       */

#define PCMCIA_SCHLVL PCMCIA_INTERRUPT /* Status Change Interrupt Level      */

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

/* 2.4.x and newer has this always in HZ */
#define M8XX_BUSFREQ ((((bd_t *)&(__res))->bi_busfreq))

static int pcmcia_schlvl = PCMCIA_SCHLVL;

static DEFINE_SPINLOCK(events_lock);


#define PCMCIA_SOCKET_KEY_5V 1
#define PCMCIA_SOCK