sl811_cs.c

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/*
 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
 * Filename: sl811_cs.c
 * Author:   Yukio Yamamoto
 *
 *  Port to sl811-hcd and 2.6.x by
 *    Botond Botyanszki <[email protected]>
 *    Simon Pickering
 *
 *  Last update: 2005-05-12
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include <linux/usb/sl811.h>

MODULE_AUTHOR("Botond Botyanszki");
MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
MODULE_LICENSE("GPL");


/*====================================================================*/
/* MACROS                                                             */
/*====================================================================*/

#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)

/*====================================================================*/
/* VARIABLES                                                          */
/*====================================================================*/

typedef struct local_info_t {
    struct pcmcia_device    *p_dev;
} local_info_t;

static void sl811_cs_release(struct pcmcia_device * link);

/*====================================================================*/

static void release_platform_dev(struct device * dev)
{
    dev_dbg(dev, "sl811_cs platform_dev release\n");
    dev->parent = NULL;
}

static struct sl811_platform_data platform_data = {
    .potpg      = 100,
    .power      = 50,       /* == 100mA */
    // .reset   = ... FIXME:  invoke CF reset on the card
};

static struct resource resources[] = {
    [0] = {
        .flags  = IORESOURCE_IRQ,
    },
    [1] = {
        // .name   = "address",
        .flags  = IORESOURCE_IO,
    },
    [2] = {
        // .name   = "data",
        .flags  = IORESOURCE_IO,
    },
};

extern struct platform_driver sl811h_driver;

static struct platform_device platform_dev = {
    .id         = -1,
    .dev = {
        .platform_data = &platform_data,
        .release       = release_platform_dev,
    },
    .resource       = resources,
    .num_resources      = ARRAY_SIZE(resources),
};

static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
             int irq)
{
    if (platform_dev.dev.parent)
        return -EBUSY;
    platform_dev.dev.parent = parent;

    /* finish seting up the platform device */
    resources[0].start = irq;

    resources[1].start = base_addr;
    resources[1].end = base_addr;

    resources[2].start = base_addr + 1;
    resources[2].end   = base_addr + 1;

    /* The driver core will probe for us.  We know sl811-hcd has been
     * initialized already because of the link order dependency created
     * by referencing "sl811h_driver".
     */
    platform_dev.name = sl811h_driver.driver.name;
    return platform_device_register(&platform_dev);
}

/*====================================================================*/

static void sl811_cs_detach(struct pcmcia_device *link)
{
    dev_dbg(&link->dev, "sl811_cs_detach\n");

    sl811_cs_release(link);

    /* This points to the parent local_info_t struct */
    kfree(link->priv);
}

static void sl811_cs_release(struct pcmcia_device * link)
{
    dev_dbg(&link->dev, "sl811_cs_release\n");

    pcmcia_disable_device(link);
    platform_device_unregister(&platform_dev);
}

static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
{
    if (p_dev->config_index == 0)
        return -EINVAL;

    return pcmcia_request_io(p_dev);
}


static int sl811_cs_config(struct pcmcia_device *link)
{
    struct device       *parent = &link->dev;
    int         ret;

    dev_dbg(&link->dev, "sl811_cs_config\n");

    link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
        CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO;

    if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
        goto failed;

    /* require an IRQ and two registers */
    if (resource_size(link->resource[0]) < 2)
        goto failed;

    if (!link->irq)
        goto failed;

    ret = pcmcia_enable_device(link);
    if (ret)
        goto failed;

    if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
            < 0) {
failed:
        printk(KERN_WARNING "sl811_cs_config failed\n");
        sl811_cs_release(link);
        return  -ENODEV;
    }
    return 0;
}

static int sl811_cs_probe(struct pcmcia_device *link)
{
    local_info_t *local;

    local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
    if (!local)
        return -ENOMEM;
    local->p_dev = link;
    link->priv = local;

    return sl811_cs_config(link);
}

static const struct pcmcia_device_id sl811_ids[] = {
    PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
    PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, sl811_ids);

static struct pcmcia_driver sl811_cs_driver = {
    .owner      = THIS_MODULE,
    .name       = "sl811_cs",
    .probe      = sl811_cs_probe,
    .remove     = sl811_cs_detach,
    .id_table   = sl811_ids,
};

/*====================================================================*/

static int __init init_sl811_cs(void)
{
    return pcmcia_register_driver(&sl811_cs_driver);
}
module_init(init_sl811_cs);

static void __exit exit_sl811_cs(void)
{
    pcmcia_unregister_driver(&sl811_cs_driver);
}
module_exit(exit_sl811_cs);