linux-imx

/*

 * PCMCIA socket code for the Alchemy Db1xxx/Pb1xxx boards.

 *

 * Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com>

 *

 */

​

/* This is a fairly generic PCMCIA socket driver suitable for the

 * following Alchemy Development boards:

 *  Db1000, Db/Pb1500, Db/Pb1100, Db/Pb1550, Db/Pb1200, Db1300

 *

 * The Db1000 is used as a reference:  Per-socket card-, carddetect- and

 *  statuschange IRQs connected to SoC GPIOs, control and status register

 *  bits arranged in per-socket groups in an external PLD.  All boards

 *  listed here use this layout, including bit positions and meanings.

 *  Of course there are exceptions in later boards:

 *

 *  - Pb1100/Pb1500:  single socket only; voltage key bits VS are

 *            at STATUS[5:4] (instead of STATUS[1:0]).

 *  - Au1200-based:   additional card-eject irqs, irqs not gpios!

 *  - Db1300:     Db1200-like, no pwr ctrl, single socket (#1).

 */

​

#include <linux/delay.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/pm.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/resource.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

#include <pcmcia/ss.h>

​

#include <asm/mach-au1x00/au1000.h>

#include <asm/mach-db1x00/bcsr.h>

​

#define MEM_MAP_SIZE    0x400000

#define IO_MAP_SIZE 0x1000

​

struct db1x_pcmcia_sock {

    struct pcmcia_socket    socket;

    int     nr;     /* socket number */

    void        *virt_io;

​

    phys_addr_t phys_io;

    phys_addr_t phys_attr;

    phys_addr_t phys_mem;

​

    /* previous flags for set_socket() */

    unsigned int old_flags;

​

    /* interrupt sources: linux irq numbers! */

    int insert_irq; /* default carddetect irq */

    int stschg_irq; /* card-status-change irq */

    int card_irq;   /* card irq */

    int eject_irq;  /* db1200/pb1200 have these */

    int insert_gpio;    /* db1000 carddetect gpio */

​

#define BOARD_TYPE_DEFAULT  0   /* most boards */

#define BOARD_TYPE_DB1200   1   /* IRQs aren't gpios */

#define BOARD_TYPE_PB1100   2   /* VS bits slightly different */