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
  26 static int probe_mask;
  27 module_param(probe_mask, int, 0);
  28 MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
  29
  30 static 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
  36 static const u16 legacy_bases[] = { 0x1f0 };
  37 static const int legacy_irqs[]  = { IRQ_HARDDISK };
  38 #elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
  39       defined(CONFIG_PLAT_OPSPUT)
  40 static const u16 legacy_bases[] = { 0x1f0 };
  41 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
  42 #elif defined(CONFIG_PLAT_MAPPI3)
  43 static const u16 legacy_bases[] = { 0x1f0, 0x170 };
  44 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
  45 #elif defined(CONFIG_ALPHA)
  46 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
  47 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
  48 #else
  49 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
  50 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
  51 #endif
  52
  53 static 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
  87 static 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
 147 module_init(ide_generic_init);
 148
 149 MODULE_LICENSE("GPL");