drivers/ide/ide-legacy.c

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