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- /*
- * pata_cypress.c - Cypress PATA for new ATA layer
- * (C) 2006 Red Hat Inc
- * Alan Cox
- *
- * 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/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 - 1, 0, 15) |
- (clamp_val(t.active - 1, 0, 15) << 4);
- time_8 = clamp_val(t.act8b - 1, 0, 15) |
- (clamp_val(t.rec8b - 1, 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 - 1, 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 - 1, 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 = ATA_PIO4,
- .mwdma_mask = ATA_MWDMA2,
- .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_bmdma_init_one(pdev, ppi, &cy82c693_sht, NULL, 0);
- }
- 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_SLEEP
- .suspend = ata_pci_device_suspend,
- .resume = ata_pci_device_resume,
- #endif
- };
- module_pci_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);
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