LXR linux/drivers/ide/ide-legacy.c

   1#include <linux/kernel.h>
   2#include <linux/export.h>
   3#include <linux/ide.h>
   4
   5static void ide_legacy_init_one(struct ide_hw **hws, struct ide_hw *hw,
   6                                u8 port_no, const struct ide_port_info *d,
   7                                unsigned long config)
   8{
   9        unsigned long base, ctl;
  10        int irq;
  11
  12        if (port_no == 0) {
  13                base = 0x1f0;
  14                ctl  = 0x3f6;
  15                irq  = 14;
  16        } else {
  17                base = 0x170;
  18                ctl  = 0x376;
  19                irq  = 15;
  20        }
  21
  22        if (!request_region(base, 8, d->name)) {
  23                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  24                                d->name, base, base + 7);
  25                return;
  26        }
  27
  28        if (!request_region(ctl, 1, d->name)) {
  29                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  30                                d->name, ctl);
  31                release_region(base, 8);
  32                return;
  33        }
  34
  35        ide_std_init_ports(hw, base, ctl);
  36        hw->irq = irq;
  37        hw->config = config;
  38
  39        hws[port_no] = hw;
  40}
  41
  42int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
  43{
  44        struct ide_hw hw[2], *hws[] = { NULL, NULL };
  45
  46        memset(&hw, 0, sizeof(hw));
  47
  48        if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
  49                ide_legacy_init_one(hws, &hw[0], 0, d, config);
  50        ide_legacy_init_one(hws, &hw[1], 1, d, config);
  51
  52        if (hws[0] == NULL && hws[1] == NULL &&
  53            (d->host_flags & IDE_HFLAG_SINGLE))
  54                return -ENOENT;
  55
  56        return ide_host_add(d, hws, 2, NULL);
  57}
  58EXPORT_SYMBOL_GPL(ide_legacy_device_add);
  59