diff options
Diffstat (limited to 'drivers/ide/ide-generic.c')
| -rw-r--r-- | drivers/ide/ide-generic.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c new file mode 100644 index 000000000..54d7c4685 --- /dev/null +++ b/drivers/ide/ide-generic.c @@ -0,0 +1,149 @@ +/* + * generic/default IDE host driver + * + * Copyright (C) 2004, 2008-2009 Bartlomiej Zolnierkiewicz + * This code was split off from ide.c. See it for original copyrights. + * + * May be copied or modified under the terms of the GNU General Public License. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/ide.h> +#include <linux/pci_ids.h> + +/* FIXME: convert arm and m32r to use ide_platform host driver */ +#ifdef CONFIG_ARM +#include <asm/irq.h> +#endif +#ifdef CONFIG_M32R +#include <asm/m32r.h> +#endif + +#define DRV_NAME "ide_generic" + +static int probe_mask; +module_param(probe_mask, int, 0); +MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports"); + +static const struct ide_port_info ide_generic_port_info = { + .host_flags = IDE_HFLAG_NO_DMA, + .chipset = ide_generic, +}; + +#ifdef CONFIG_ARM +static const u16 legacy_bases[] = { 0x1f0 }; +static const int legacy_irqs[] = { IRQ_HARDDISK }; +#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \ + defined(CONFIG_PLAT_OPSPUT) +static const u16 legacy_bases[] = { 0x1f0 }; +static const int legacy_irqs[] = { PLD_IRQ_CFIREQ }; +#elif defined(CONFIG_PLAT_MAPPI3) +static const u16 legacy_bases[] = { 0x1f0, 0x170 }; +static const int legacy_irqs[] = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ }; +#elif defined(CONFIG_ALPHA) +static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 }; +static const int legacy_irqs[] = { 14, 15, 11, 10 }; +#else +static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 }; +static const int legacy_irqs[] = { 14, 15, 11, 10, 8, 12 }; +#endif + +static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary) +{ +#ifdef CONFIG_PCI + struct pci_dev *p = NULL; + u16 val; + + for_each_pci_dev(p) { + if (pci_resource_start(p, 0) == 0x1f0) + *primary = 1; + if (pci_resource_start(p, 2) == 0x170) + *secondary = 1; + + /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */ + if (p->vendor == PCI_VENDOR_ID_CYRIX && + (p->device == PCI_DEVICE_ID_CYRIX_5510 || + p->device == PCI_DEVICE_ID_CYRIX_5520)) + *primary = *secondary = 1; + + /* Intel MPIIX - PIO ATA on non PCI side of bridge */ + if (p->vendor == PCI_VENDOR_ID_INTEL && + p->device == PCI_DEVICE_ID_INTEL_82371MX) { + pci_read_config_word(p, 0x6C, &val); + if (val & 0x8000) { + /* ATA port enabled */ + if (val & 0x4000) + *secondary = 1; + else + *primary = 1; + } + } + } +#endif +} + +static int __init ide_generic_init(void) +{ + struct ide_hw hw, *hws[] = { &hw }; + unsigned long io_addr; + int i, rc = 0, primary = 0, secondary = 0; + + ide_generic_check_pci_legacy_iobases(&primary, &secondary); + + if (!probe_mask) { + printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" " + "module parameter for probing all legacy ISA IDE ports\n"); + + if (primary == 0) + probe_mask |= 0x1; + + if (secondary == 0) + probe_mask |= 0x2; + } else + printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports " + "upon user request\n"); + + for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) { + io_addr = legacy_bases[i]; + + if ((probe_mask & (1 << i)) && io_addr) { + if (!request_region(io_addr, 8, DRV_NAME)) { + printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX " + "not free.\n", + DRV_NAME, io_addr, io_addr + 7); + rc = -EBUSY; + continue; + } + + if (!request_region(io_addr + 0x206, 1, DRV_NAME)) { + printk(KERN_ERR "%s: I/O resource 0x%lX " + "not free.\n", + DRV_NAME, io_addr + 0x206); + release_region(io_addr, 8); + rc = -EBUSY; + continue; + } + + memset(&hw, 0, sizeof(hw)); + ide_std_init_ports(&hw, io_addr, io_addr + 0x206); +#ifdef CONFIG_IA64 + hw.irq = isa_irq_to_vector(legacy_irqs[i]); +#else + hw.irq = legacy_irqs[i]; +#endif + rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL); + if (rc) { + release_region(io_addr + 0x206, 1); + release_region(io_addr, 8); + } + } + } + + return rc; +} + +module_init(ide_generic_init); + +MODULE_LICENSE("GPL"); |