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 };
  33
  34 #ifdef CONFIG_ARM
  35 static const u16 legacy_bases[] = { 0x1f0 };
  36 static const int legacy_irqs[]  = { IRQ_HARDDISK };
  37 #elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
  38       defined(CONFIG_PLAT_OPSPUT)
  39 static const u16 legacy_bases[] = { 0x1f0 };
  40 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
  41 #elif defined(CONFIG_PLAT_MAPPI3)
  42 static const u16 legacy_bases[] = { 0x1f0, 0x170 };
  43 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
  44 #elif defined(CONFIG_ALPHA)
  45 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
  46 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
  47 #else
  48 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
  49 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
  50 #endif
  51
  52 static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
  53 {
  54 #ifdef CONFIG_PCI
  55         struct pci_dev *p = NULL;
  56         u16 val;
  57
  58         for_each_pci_dev(p) {
  59                 if (pci_resource_start(p, 0) == 0x1f0)
  60                         *primary = 1;
  61                 if (pci_resource_start(p, 2) == 0x170)
  62                         *secondary = 1;
  63
  64                 /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
  65                 if (p->vendor == PCI_VENDOR_ID_CYRIX &&
  66                     (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
  67                      p->device == PCI_DEVICE_ID_CYRIX_5520))
  68                         *primary = *secondary = 1;
  69
  70                 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
  71                 if (p->vendor == PCI_VENDOR_ID_INTEL &&
  72                     p->device == PCI_DEVICE_ID_INTEL_82371MX) {
  73                         pci_read_config_word(p, 0x6C, &val);
  74                         if (val & 0x8000) {
  75                                 /* ATA port enabled */
  76                                 if (val & 0x4000)
  77                                         *secondary = 1;
  78                                 else
  79                                         *primary = 1;
  80                         }
  81                 }
  82         }
  83 #endif
  84 }
  85
  86 static int __init ide_generic_init(void)
  87 {
  88         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
  89         unsigned long io_addr;
  90         int i, rc = 0, primary = 0, secondary = 0;
  91
  92         ide_generic_check_pci_legacy_iobases(&primary, &secondary);
  93
  94         if (!probe_mask) {
  95                 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
  96                      "module parameter for probing all legacy ISA IDE ports\n");
  97
  98                 if (primary == 0)
  99                         probe_mask |= 0x1;
 100
 101                 if (secondary == 0)
 102                         probe_mask |= 0x2;
 103         } else
 104                 printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
 105                         "upon user request\n");
 106
 107         for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
 108                 io_addr = legacy_bases[i];
 109
 110                 if ((probe_mask & (1 << i)) && io_addr) {
 111                         if (!request_region(io_addr, 8, DRV_NAME)) {
 112                                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
 113                                                 "not free.\n",
 114                                                 DRV_NAME, io_addr, io_addr + 7);
 115                                 rc = -EBUSY;
 116                                 continue;
 117                         }
 118
 119                         if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
 120                                 printk(KERN_ERR "%s: I/O resource 0x%lX "
 121                                                 "not free.\n",
 122                                                 DRV_NAME, io_addr + 0x206);
 123                                 release_region(io_addr, 8);
 124                                 rc = -EBUSY;
 125                                 continue;
 126                         }
 127
 128                         memset(&hw, 0, sizeof(hw));
 129                         ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
 130 #ifdef CONFIG_IA64
 131                         hw.irq = isa_irq_to_vector(legacy_irqs[i]);
 132 #else
 133                         hw.irq = legacy_irqs[i];
 134 #endif
 135                         hw.chipset = ide_generic;
 136
 137                         rc = ide_host_add(&ide_generic_port_info, hws, NULL);
 138                         if (rc) {
 139                                 release_region(io_addr + 0x206, 1);
 140                                 release_region(io_addr, 8);
 141                         }
 142                 }
 143         }
 144
 145         return rc;
 146 }
 147
 148 module_init(ide_generic_init);
 149
 150 MODULE_LICENSE("GPL");