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

   1/*
   2 * generic/default IDE host driver
   3 *
   4 * Copyright (C) 2004, 2008-2009 Bartlomiej Zolnierkiewicz
   5 * This code was split off from ide.c.  See it for original copyrights.
   6 *
   7 * May be copied or modified under the terms of the GNU General Public License.
   8 */
   9
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/module.h>
  13#include <linux/ide.h>
  14#include <linux/pci_ids.h>
  15
  16/* FIXME: convert arm and m32r to use ide_platform host driver */
  17#ifdef CONFIG_ARM
  18#include <asm/irq.h>
  19#endif
  20#ifdef CONFIG_M32R
  21#include <asm/m32r.h>
  22#endif
  23
  24#define DRV_NAME        "ide_generic"
  25
  26static int probe_mask;
  27module_param(probe_mask, int, 0);
  28MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
  29
  30static const struct ide_port_info ide_generic_port_info = {
  31        .host_flags             = IDE_HFLAG_NO_DMA,
  32        .chipset                = ide_generic,
  33};
  34
  35#ifdef CONFIG_ARM
  36static const u16 legacy_bases[] = { 0x1f0 };
  37static const int legacy_irqs[]  = { IRQ_HARDDISK };
  38#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
  39      defined(CONFIG_PLAT_OPSPUT)
  40static const u16 legacy_bases[] = { 0x1f0 };
  41static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
  42#elif defined(CONFIG_PLAT_MAPPI3)
  43static const u16 legacy_bases[] = { 0x1f0, 0x170 };
  44static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
  45#elif defined(CONFIG_ALPHA)
  46static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
  47static const int legacy_irqs[]  = { 14, 15, 11, 10 };
  48#else
  49static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
  50static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
  51#endif
  52
  53static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
  54{
  55#ifdef CONFIG_PCI
  56        struct pci_dev *p = NULL;
  57        u16 val;
  58
  59        for_each_pci_dev(p) {
  60                if (pci_resource_start(p, 0) == 0x1f0)
  61                        *primary = 1;
  62                if (pci_resource_start(p, 2) == 0x170)
  63                        *secondary = 1;
  64
  65                /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
  66                if (p->vendor == PCI_VENDOR_ID_CYRIX &&
  67                    (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
  68                     p->device == PCI_DEVICE_ID_CYRIX_5520))
  69                        *primary = *secondary = 1;
  70
  71                /* Intel MPIIX - PIO ATA on non PCI side of bridge */
  72                if (p->vendor == PCI_VENDOR_ID_INTEL &&
  73                    p->device == PCI_DEVICE_ID_INTEL_82371MX) {
  74                        pci_read_config_word(p, 0x6C, &val);
  75                        if (val & 0x8000) {
  76                                /* ATA port enabled */
  77                                if (val & 0x4000)
  78                                        *secondary = 1;
  79                                else
  80                                        *primary = 1;
  81                        }
  82                }
  83        }
  84#endif
  85}
  86
  87static int __init ide_generic_init(void)
  88{
  89        struct ide_hw hw, *hws[] = { &hw };
  90        unsigned long io_addr;
  91        int i, rc = 0, primary = 0, secondary = 0;
  92
  93        ide_generic_check_pci_legacy_iobases(&primary, &secondary);
  94
  95        if (!probe_mask) {
  96                printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
  97                     "module parameter for probing all legacy ISA IDE ports\n");
  98
  99                if (primary == 0)
 100                        probe_mask |= 0x1;
 101
 102                if (secondary == 0)
 103                        probe_mask |= 0x2;
 104        } else
 105                printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
 106                        "upon user request\n");
 107
 108        for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
 109                io_addr = legacy_bases[i];
 110
 111                if ((probe_mask & (1 << i)) && io_addr) {
 112                        if (!request_region(io_addr, 8, DRV_NAME)) {
 113                                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
 114                                                "not free.\n",
 115                                                DRV_NAME, io_addr, io_addr + 7);
 116                                rc = -EBUSY;
 117                                continue;
 118                        }
 119
 120                        if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
 121                                printk(KERN_ERR "%s: I/O resource 0x%lX "
 122                                                "not free.\n",
 123                                                DRV_NAME, io_addr + 0x206);
 124                                release_region(io_addr, 8);
 125                                rc = -EBUSY;
 126                                continue;
 127                        }
 128
 129                        memset(&hw, 0, sizeof(hw));
 130                        ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
 131#ifdef CONFIG_IA64
 132                        hw.irq = isa_irq_to_vector(legacy_irqs[i]);
 133#else
 134                        hw.irq = legacy_irqs[i];
 135#endif
 136                        rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL);
 137                        if (rc) {
 138                                release_region(io_addr + 0x206, 1);
 139                                release_region(io_addr, 8);
 140                        }
 141                }
 142        }
 143
 144        return rc;
 145}
 146
 147module_init(ide_generic_init);
 148
 149MODULE_LICENSE("GPL");
 150