drivers/ide/ide-legacy.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/kernel.h>
   3 #include <linux/export.h>
   4 #include <linux/ide.h>
   5
   6 static void ide_legacy_init_one(struct ide_hw **hws, struct ide_hw *hw,
   7                                 u8 port_no, const struct ide_port_info *d,
   8                                 unsigned long config)
   9 {
  10         unsigned long base, ctl;
  11         int irq;
  12
  13         if (port_no == 0) {
  14                 base = 0x1f0;
  15                 ctl  = 0x3f6;
  16                 irq  = 14;
  17         } else {
  18                 base = 0x170;
  19                 ctl  = 0x376;
  20                 irq  = 15;
  21         }
  22
  23         if (!request_region(base, 8, d->name)) {
  24                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  25                                 d->name, base, base + 7);
  26                 return;
  27         }
  28
  29         if (!request_region(ctl, 1, d->name)) {
  30                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  31                                 d->name, ctl);
  32                 release_region(base, 8);
  33                 return;
  34         }
  35
  36         ide_std_init_ports(hw, base, ctl);
  37         hw->irq = irq;
  38         hw->config = config;
  39
  40         hws[port_no] = hw;
  41 }
  42
  43 int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
  44 {
  45         struct ide_hw hw[2], *hws[] = { NULL, NULL };
  46
  47         memset(&hw, 0, sizeof(hw));
  48
  49         if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
  50                 ide_legacy_init_one(hws, &hw[0], 0, d, config);
  51         ide_legacy_init_one(hws, &hw[1], 1, d, config);
  52
  53         if (hws[0] == NULL && hws[1] == NULL &&
  54             (d->host_flags & IDE_HFLAG_SINGLE))
  55                 return -ENOENT;
  56
  57         return ide_host_add(d, hws, 2, NULL);
  58 }
  59 EXPORT_SYMBOL_GPL(ide_legacy_device_add);