| /* |
| * RZ1000/1001 driver based upon |
| * |
| * linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003 |
| * Copyright (C) 1995-1998 Linus Torvalds & author (see below) |
| * Principal Author: mlord@pobox.com (Mark Lord) |
| * |
| * See linux/MAINTAINERS for address of current maintainer. |
| * |
| * This file provides support for disabling the buggy read-ahead |
| * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards. |
| */ |
| |
| #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> |
| #include <linux/libata.h> |
| |
| #define DRV_NAME "pata_rz1000" |
| #define DRV_VERSION "0.2.4" |
| |
| |
| /** |
| * rz1000_set_mode - mode setting function |
| * @link: ATA link |
| * @unused: returned device on set_mode failure |
| * |
| * Use a non standard set_mode function. We don't want to be tuned. We |
| * would prefer to be BIOS generic but for the fact our hardware is |
| * whacked out. |
| */ |
| |
| static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused) |
| { |
| struct ata_device *dev; |
| |
| ata_link_for_each_dev(dev, link) { |
| if (ata_dev_enabled(dev)) { |
| /* We don't really care */ |
| dev->pio_mode = XFER_PIO_0; |
| dev->xfer_mode = XFER_PIO_0; |
| dev->xfer_shift = ATA_SHIFT_PIO; |
| dev->flags |= ATA_DFLAG_PIO; |
| ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); |
| } |
| } |
| return 0; |
| } |
| |
| |
| static struct scsi_host_template rz1000_sht = { |
| ATA_PIO_SHT(DRV_NAME), |
| }; |
| |
| static struct ata_port_operations rz1000_port_ops = { |
| .inherits = &ata_sff_port_ops, |
| .cable_detect = ata_cable_40wire, |
| .set_mode = rz1000_set_mode, |
| }; |
| |
| static int rz1000_fifo_disable(struct pci_dev *pdev) |
| { |
| u16 reg; |
| /* Be exceptionally paranoid as we must be sure to apply the fix */ |
| if (pci_read_config_word(pdev, 0x40, ®) != 0) |
| return -1; |
| reg &= 0xDFFF; |
| if (pci_write_config_word(pdev, 0x40, reg) != 0) |
| return -1; |
| printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n"); |
| return 0; |
| } |
| |
| /** |
| * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services |
| * @pdev: PCI device to register |
| * @ent: Entry in rz1000_pci_tbl matching with @pdev |
| * |
| * Configure an RZ1000 interface. This doesn't require much special |
| * handling except that we *MUST* kill the chipset readahead or the |
| * user may experience data corruption. |
| */ |
| |
| static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) |
| { |
| static int printed_version; |
| static const struct ata_port_info info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .port_ops = &rz1000_port_ops |
| }; |
| const struct ata_port_info *ppi[] = { &info, NULL }; |
| |
| if (!printed_version++) |
| printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); |
| |
| if (rz1000_fifo_disable(pdev) == 0) |
| return ata_pci_init_one(pdev, ppi, &rz1000_sht); |
| |
| printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n"); |
| /* Not safe to use so skip */ |
| return -ENODEV; |
| } |
| |
| #ifdef CONFIG_PM |
| static int rz1000_reinit_one(struct pci_dev *pdev) |
| { |
| /* If this fails on resume (which is a "cant happen" case), we |
| must stop as any progress risks data loss */ |
| if (rz1000_fifo_disable(pdev)) |
| panic("rz1000 fifo"); |
| return ata_pci_device_resume(pdev); |
| } |
| #endif |
| |
| static const struct pci_device_id pata_rz1000[] = { |
| { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), }, |
| { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), }, |
| |
| { }, |
| }; |
| |
| static struct pci_driver rz1000_pci_driver = { |
| .name = DRV_NAME, |
| .id_table = pata_rz1000, |
| .probe = rz1000_init_one, |
| .remove = ata_pci_remove_one, |
| #ifdef CONFIG_PM |
| .suspend = ata_pci_device_suspend, |
| .resume = rz1000_reinit_one, |
| #endif |
| }; |
| |
| static int __init rz1000_init(void) |
| { |
| return pci_register_driver(&rz1000_pci_driver); |
| } |
| |
| static void __exit rz1000_exit(void) |
| { |
| pci_unregister_driver(&rz1000_pci_driver); |
| } |
| |
| MODULE_AUTHOR("Alan Cox"); |
| MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DEVICE_TABLE(pci, pata_rz1000); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_init(rz1000_init); |
| module_exit(rz1000_exit); |
| |