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