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path: root/drivers/ata/ata_generic.c
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Diffstat (limited to 'drivers/ata/ata_generic.c')
-rw-r--r--drivers/ata/ata_generic.c104
1 files changed, 74 insertions, 30 deletions
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 12e26c3c68e..9ff545ce8da 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -19,7 +19,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
-#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
@@ -32,6 +31,12 @@
* A generic parallel ATA driver using libata
*/
+enum {
+ ATA_GEN_CLASS_MATCH = (1 << 0),
+ ATA_GEN_FORCE_DMA = (1 << 1),
+ ATA_GEN_INTEL_IDER = (1 << 2),
+};
+
/**
* generic_set_mode - mode setting
* @link: link to set up
@@ -46,16 +51,16 @@
static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
{
struct ata_port *ap = link->ap;
+ const struct pci_device_id *id = ap->host->private_data;
int dma_enabled = 0;
struct ata_device *dev;
- struct pci_dev *pdev = to_pci_dev(ap->host->dev);
- /* Bits 5 and 6 indicate if DMA is active on master/slave */
- if (ap->ioaddr.bmdma_addr)
+ if (id->driver_data & ATA_GEN_FORCE_DMA) {
+ dma_enabled = 0xff;
+ } else if (ap->ioaddr.bmdma_addr) {
+ /* Bits 5 and 6 indicate if DMA is active on master/slave */
dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-
- if (pdev->vendor == PCI_VENDOR_ID_CENATEK)
- dma_enabled = 0xFF;
+ }
ata_for_each_dev(dev, link, ENABLED) {
/* We don't really care */
@@ -75,14 +80,13 @@ static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0);
}
- ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
- name);
+ ata_dev_info(dev, "configured for %s\n", name);
dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
dev->flags &= ~ATA_DFLAG_PIO;
} else {
- ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
+ ata_dev_info(dev, "configured for PIO\n");
dev->xfer_mode = XFER_PIO_0;
dev->xfer_shift = ATA_SHIFT_PIO;
dev->flags |= ATA_DFLAG_PIO;
@@ -104,6 +108,49 @@ static struct ata_port_operations generic_port_ops = {
static int all_generic_ide; /* Set to claim all devices */
/**
+ * is_intel_ider - identify intel IDE-R devices
+ * @dev: PCI device
+ *
+ * Distinguish Intel IDE-R controller devices from other Intel IDE
+ * devices. IDE-R devices have no timing registers and are in
+ * most respects virtual. They should be driven by the ata_generic
+ * driver.
+ *
+ * IDE-R devices have PCI offset 0xF8.L as zero, later Intel ATA has
+ * it non zero. All Intel ATA has 0x40 writable (timing), but it is
+ * not writable on IDE-R devices (this is guaranteed).
+ */
+
+static int is_intel_ider(struct pci_dev *dev)
+{
+ /* For Intel IDE the value at 0xF8 is only zero on IDE-R
+ interfaces */
+ u32 r;
+ u16 t;
+
+ /* Check the manufacturing ID, it will be zero for IDE-R */
+ pci_read_config_dword(dev, 0xF8, &r);
+ /* Not IDE-R: punt so that ata_(old)piix gets it */
+ if (r != 0)
+ return 0;
+ /* 0xF8 will also be zero on some early Intel IDE devices
+ but they will have a sane timing register */
+ pci_read_config_word(dev, 0x40, &t);
+ if (t != 0)
+ return 0;
+ /* Finally check if the timing register is writable so that
+ we eliminate any early devices hot-docked in a docking
+ station */
+ pci_write_config_word(dev, 0x40, 1);
+ pci_read_config_word(dev, 0x40, &t);
+ if (t) {
+ pci_write_config_word(dev, 0x40, 0);
+ return 0;
+ }
+ return 1;
+}
+
+/**
* ata_generic_init - attach generic IDE
* @dev: PCI device found
* @id: match entry
@@ -126,9 +173,13 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
const struct ata_port_info *ppi[] = { &info, NULL };
/* Don't use the generic entry unless instructed to do so */
- if (id->driver_data == 1 && all_generic_ide == 0)
+ if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0)
return -ENODEV;
+ if ((id->driver_data & ATA_GEN_INTEL_IDER) && !all_generic_ide)
+ if (!is_intel_ider(dev))
+ return -ENODEV;
+
/* Devices that need care */
if (dev->vendor == PCI_VENDOR_ID_UMC &&
dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
@@ -155,7 +206,7 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
return rc;
pcim_pin_device(dev);
}
- return ata_pci_sff_init_one(dev, ppi, &generic_sht, NULL);
+ return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0);
}
static struct pci_device_id ata_generic[] = {
@@ -167,15 +218,21 @@ static struct pci_device_id ata_generic[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
{ PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
- { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), },
+ { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE),
+ .driver_data = ATA_GEN_FORCE_DMA },
#if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE)
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), },
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), },
-#endif
+#endif
+ /* Intel, IDE class device */
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+ PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL,
+ .driver_data = ATA_GEN_INTEL_IDER },
/* Must come last. If you add entries adjust this table appropriately */
- { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
+ { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL),
+ .driver_data = ATA_GEN_CLASS_MATCH },
{ 0, },
};
@@ -184,23 +241,13 @@ static struct pci_driver ata_generic_pci_driver = {
.id_table = ata_generic,
.probe = ata_generic_init_one,
.remove = ata_pci_remove_one,
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
.suspend = ata_pci_device_suspend,
.resume = ata_pci_device_resume,
#endif
};
-static int __init ata_generic_init(void)
-{
- return pci_register_driver(&ata_generic_pci_driver);
-}
-
-
-static void __exit ata_generic_exit(void)
-{
- pci_unregister_driver(&ata_generic_pci_driver);
-}
-
+module_pci_driver(ata_generic_pci_driver);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for generic ATA");
@@ -208,7 +255,4 @@ MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ata_generic);
MODULE_VERSION(DRV_VERSION);
-module_init(ata_generic_init);
-module_exit(ata_generic_exit);
-
module_param(all_generic_ide, int, 0);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:58:16 +0000