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139 lines
3.5 KiB
139 lines
3.5 KiB
/* |
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* generic/default IDE host driver |
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* |
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* Copyright (C) 2004, 2008-2009 Bartlomiej Zolnierkiewicz |
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* This code was split off from ide.c. See it for original copyrights. |
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* |
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* May be copied or modified under the terms of the GNU General Public License. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/ide.h> |
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#include <linux/pci_ids.h> |
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/* FIXME: convert arm to use ide_platform host driver */ |
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#ifdef CONFIG_ARM |
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#include <asm/irq.h> |
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#endif |
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#define DRV_NAME "ide_generic" |
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static int probe_mask; |
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module_param(probe_mask, int, 0); |
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MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports"); |
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static const struct ide_port_info ide_generic_port_info = { |
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.host_flags = IDE_HFLAG_NO_DMA, |
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.chipset = ide_generic, |
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}; |
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#ifdef CONFIG_ARM |
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static const u16 legacy_bases[] = { 0x1f0 }; |
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static const int legacy_irqs[] = { IRQ_HARDDISK }; |
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#elif defined(CONFIG_ALPHA) |
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static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 }; |
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static const int legacy_irqs[] = { 14, 15, 11, 10 }; |
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#else |
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static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 }; |
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static const int legacy_irqs[] = { 14, 15, 11, 10, 8, 12 }; |
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#endif |
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static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary) |
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{ |
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#ifdef CONFIG_PCI |
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struct pci_dev *p = NULL; |
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u16 val; |
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for_each_pci_dev(p) { |
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if (pci_resource_start(p, 0) == 0x1f0) |
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*primary = 1; |
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if (pci_resource_start(p, 2) == 0x170) |
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*secondary = 1; |
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/* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */ |
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if (p->vendor == PCI_VENDOR_ID_CYRIX && |
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(p->device == PCI_DEVICE_ID_CYRIX_5510 || |
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p->device == PCI_DEVICE_ID_CYRIX_5520)) |
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*primary = *secondary = 1; |
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/* Intel MPIIX - PIO ATA on non PCI side of bridge */ |
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if (p->vendor == PCI_VENDOR_ID_INTEL && |
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p->device == PCI_DEVICE_ID_INTEL_82371MX) { |
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pci_read_config_word(p, 0x6C, &val); |
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if (val & 0x8000) { |
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/* ATA port enabled */ |
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if (val & 0x4000) |
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*secondary = 1; |
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else |
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*primary = 1; |
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} |
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} |
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} |
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#endif |
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} |
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static int __init ide_generic_init(void) |
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{ |
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struct ide_hw hw, *hws[] = { &hw }; |
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unsigned long io_addr; |
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int i, rc = 0, primary = 0, secondary = 0; |
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ide_generic_check_pci_legacy_iobases(&primary, &secondary); |
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if (!probe_mask) { |
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printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" " |
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"module parameter for probing all legacy ISA IDE ports\n"); |
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if (primary == 0) |
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probe_mask |= 0x1; |
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if (secondary == 0) |
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probe_mask |= 0x2; |
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} else |
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printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports " |
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"upon user request\n"); |
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for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) { |
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io_addr = legacy_bases[i]; |
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if ((probe_mask & (1 << i)) && io_addr) { |
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if (!request_region(io_addr, 8, DRV_NAME)) { |
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printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX " |
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"not free.\n", |
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DRV_NAME, io_addr, io_addr + 7); |
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rc = -EBUSY; |
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continue; |
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} |
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if (!request_region(io_addr + 0x206, 1, DRV_NAME)) { |
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printk(KERN_ERR "%s: I/O resource 0x%lX " |
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"not free.\n", |
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DRV_NAME, io_addr + 0x206); |
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release_region(io_addr, 8); |
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rc = -EBUSY; |
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continue; |
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} |
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memset(&hw, 0, sizeof(hw)); |
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ide_std_init_ports(&hw, io_addr, io_addr + 0x206); |
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#ifdef CONFIG_IA64 |
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hw.irq = isa_irq_to_vector(legacy_irqs[i]); |
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#else |
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hw.irq = legacy_irqs[i]; |
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#endif |
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rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL); |
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if (rc) { |
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release_region(io_addr + 0x206, 1); |
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release_region(io_addr, 8); |
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} |
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} |
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} |
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return rc; |
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} |
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module_init(ide_generic_init); |
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MODULE_LICENSE("GPL");
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