ide-legacy.c

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#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/ide.h>

static void ide_legacy_init_one(struct ide_hw **hws, struct ide_hw *hw,
                u8 port_no, const struct ide_port_info *d,
                unsigned long config)
{
    unsigned long base, ctl;
    int irq;

    if (port_no == 0) {
        base = 0x1f0;
        ctl  = 0x3f6;
        irq  = 14;
    } else {
        base = 0x170;
        ctl  = 0x376;
        irq  = 15;
    }

    if (!request_region(base, 8, d->name)) {
        printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
                d->name, base, base + 7);
        return;
    }

    if (!request_region(ctl, 1, d->name)) {
        printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
                d->name, ctl);
        release_region(base, 8);
        return;
    }

    ide_std_init_ports(hw, base, ctl);
    hw->irq = irq;
    hw->config = config;

    hws[port_no] = hw;
}

int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
{
    struct ide_hw hw[2], *hws[] = { NULL, NULL };

    memset(&hw, 0, sizeof(hw));

    if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
        ide_legacy_init_one(hws, &hw[0], 0, d, config);
    ide_legacy_init_one(hws, &hw[1], 1, d, config);

    if (hws[0] == NULL && hws[1] == NULL &&
        (d->host_flags & IDE_HFLAG_SINGLE))
        return -ENOENT;

    return ide_host_add(d, hws, 2, NULL);
}
EXPORT_SYMBOL_GPL(ide_legacy_device_add);