/* * pata_cypress.c - Cypress PATA for new ATA layer * (C) 2006 Red Hat Inc * Alan Cox <alan@redhat.com> * * Based heavily on * linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002 * */ #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_cypress" #define DRV_VERSION "0.1.5" /* here are the offset definitions for the registers */ enum { CY82_IDE_CMDREG = 0x04, CY82_IDE_ADDRSETUP = 0x48, CY82_IDE_MASTER_IOR = 0x4C, CY82_IDE_MASTER_IOW = 0x4D, CY82_IDE_SLAVE_IOR = 0x4E, CY82_IDE_SLAVE_IOW = 0x4F, CY82_IDE_MASTER_8BIT = 0x50, CY82_IDE_SLAVE_8BIT = 0x51, CY82_INDEX_PORT = 0x22, CY82_DATA_PORT = 0x23, CY82_INDEX_CTRLREG1 = 0x01, CY82_INDEX_CHANNEL0 = 0x30, CY82_INDEX_CHANNEL1 = 0x31, CY82_INDEX_TIMEOUT = 0x32 }; /** * cy82c693_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Called to do the PIO mode setup. */ static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); struct ata_timing t; const unsigned long T = 1000000 / 33; short time_16, time_8; u32 addr; if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) { printk(KERN_ERR DRV_NAME ": mome computation failed.\n"); return; } time_16 = clamp_val(t.recover, 0, 15) | (clamp_val(t.active, 0, 15) << 4); time_8 = clamp_val(t.act8b, 0, 15) | (clamp_val(t.rec8b, 0, 15) << 4); if (adev->devno == 0) { pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); addr &= ~0x0F; /* Mask bits */ addr |= clamp_val(t.setup, 0, 15); pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16); pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8); } else { pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); addr &= ~0xF0; /* Mask bits */ addr |= (clamp_val(t.setup, 0, 15) << 4); pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16); pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8); } } /** * cy82c693_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Called to do the DMA mode setup. */ static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev) { int reg = CY82_INDEX_CHANNEL0 + ap->port_no; /* Be afraid, be very afraid. Magic registers in low I/O space */ outb(reg, 0x22); outb(adev->dma_mode - XFER_MW_DMA_0, 0x23); /* 0x50 gives the best behaviour on the Alpha's using this chip */ outb(CY82_INDEX_TIMEOUT, 0x22); outb(0x50, 0x23); } static struct scsi_host_template cy82c693_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations cy82c693_port_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = ata_cable_40wire, .set_piomode = cy82c693_set_piomode, .set_dmamode = cy82c693_set_dmamode, }; static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id) { static const struct ata_port_info info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = 0x1f, .mwdma_mask = 0x07, .port_ops = &cy82c693_port_ops }; const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. For the moment we don't handle the secondary. FIXME */ if (PCI_FUNC(pdev->devfn) != 1) return -ENODEV; return ata_pci_sff_init_one(pdev, ppi, &cy82c693_sht, NULL); } static const struct pci_device_id cy82c693[] = { { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), }, { }, }; static struct pci_driver cy82c693_pci_driver = { .name = DRV_NAME, .id_table = cy82c693, .probe = cy82c693_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; static int __init cy82c693_init(void) { return pci_register_driver(&cy82c693_pci_driver); } static void __exit cy82c693_exit(void) { pci_unregister_driver(&cy82c693_pci_driver); } MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, cy82c693); MODULE_VERSION(DRV_VERSION); module_init(cy82c693_init); module_exit(cy82c693_exit);