LXR linux/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
   6static 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
  43int 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}
  59EXPORT_SYMBOL_GPL(ide_legacy_device_add);
  60