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@@ -1,17 +1,89 @@
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/*
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* generic/default IDE host driver
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*
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- * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
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+ * Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
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* This code was split off from ide.c. See it for original copyrights.
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*
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* May be copied or modified under the terms of the GNU General Public License.
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*/
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+/*
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+ * For special cases new interfaces may be added using sysfs, i.e.
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+ *
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+ * echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
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+ *
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+ * will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
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+ */
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+
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/ide.h>
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+#define DRV_NAME "ide_generic"
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+
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+static ssize_t store_add(struct class *cls, const char *buf, size_t n)
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+{
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+ ide_hwif_t *hwif;
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+ unsigned int base, ctl;
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+ int irq;
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+ hw_regs_t hw;
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+ u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
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+
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+ if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
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+ return -EINVAL;
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+
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+ hwif = ide_find_port(base);
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+ if (hwif == NULL)
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+ return -ENOENT;
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+
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+ memset(&hw, 0, sizeof(hw));
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+ ide_std_init_ports(&hw, base, ctl);
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+ hw.irq = irq;
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+ hw.chipset = ide_generic;
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+
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+ ide_init_port_hw(hwif, &hw);
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+
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+ idx[0] = hwif->index;
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+
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+ ide_device_add(idx, NULL);
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+
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+ return n;
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+};
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+
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+static struct class_attribute ide_generic_class_attrs[] = {
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+ __ATTR(add, S_IWUSR, NULL, store_add),
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+ __ATTR_NULL
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+};
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+
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+static void ide_generic_class_release(struct class *cls)
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+{
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+ kfree(cls);
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+}
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+
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+static int __init ide_generic_sysfs_init(void)
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+{
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+ struct class *cls;
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+ int rc;
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+
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+ cls = kzalloc(sizeof(*cls), GFP_KERNEL);
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+ if (!cls)
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+ return -ENOMEM;
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+
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+ cls->name = DRV_NAME;
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+ cls->owner = THIS_MODULE;
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+ cls->class_release = ide_generic_class_release;
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+ cls->class_attrs = ide_generic_class_attrs;
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+
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+ rc = class_register(cls);
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+ if (rc) {
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+ kfree(cls);
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+ return rc;
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+ }
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+
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+ return 0;
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+}
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+
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static int __init ide_generic_init(void)
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{
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u8 idx[MAX_HWIFS];
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@@ -30,6 +102,10 @@ static int __init ide_generic_init(void)
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ide_device_add_all(idx, NULL);
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+ if (ide_generic_sysfs_init())
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+ printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
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+ "class\n");
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+
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return 0;
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}
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