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167 lines
4.3 KiB
167 lines
4.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* pata_cypress.c - Cypress PATA for new ATA layer |
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* (C) 2006 Red Hat Inc |
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* Alan Cox |
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* |
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* Based heavily on |
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* linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002 |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/blkdev.h> |
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#include <linux/delay.h> |
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#include <scsi/scsi_host.h> |
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#include <linux/libata.h> |
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#define DRV_NAME "pata_cypress" |
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#define DRV_VERSION "0.1.5" |
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/* here are the offset definitions for the registers */ |
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enum { |
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CY82_IDE_CMDREG = 0x04, |
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CY82_IDE_ADDRSETUP = 0x48, |
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CY82_IDE_MASTER_IOR = 0x4C, |
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CY82_IDE_MASTER_IOW = 0x4D, |
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CY82_IDE_SLAVE_IOR = 0x4E, |
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CY82_IDE_SLAVE_IOW = 0x4F, |
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CY82_IDE_MASTER_8BIT = 0x50, |
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CY82_IDE_SLAVE_8BIT = 0x51, |
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CY82_INDEX_PORT = 0x22, |
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CY82_DATA_PORT = 0x23, |
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CY82_INDEX_CTRLREG1 = 0x01, |
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CY82_INDEX_CHANNEL0 = 0x30, |
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CY82_INDEX_CHANNEL1 = 0x31, |
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CY82_INDEX_TIMEOUT = 0x32 |
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}; |
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/** |
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* cy82c693_set_piomode - set initial PIO mode data |
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* @ap: ATA interface |
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* @adev: ATA device |
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* |
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* Called to do the PIO mode setup. |
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*/ |
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static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) |
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{ |
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struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
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struct ata_timing t; |
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const unsigned long T = 1000000 / 33; |
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short time_16, time_8; |
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u32 addr; |
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if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) { |
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printk(KERN_ERR DRV_NAME ": mome computation failed.\n"); |
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return; |
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} |
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time_16 = clamp_val(t.recover - 1, 0, 15) | |
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(clamp_val(t.active - 1, 0, 15) << 4); |
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time_8 = clamp_val(t.act8b - 1, 0, 15) | |
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(clamp_val(t.rec8b - 1, 0, 15) << 4); |
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if (adev->devno == 0) { |
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pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); |
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addr &= ~0x0F; /* Mask bits */ |
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addr |= clamp_val(t.setup - 1, 0, 15); |
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pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); |
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pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); |
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pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16); |
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pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8); |
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} else { |
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pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); |
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addr &= ~0xF0; /* Mask bits */ |
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addr |= (clamp_val(t.setup - 1, 0, 15) << 4); |
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pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); |
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); |
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16); |
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8); |
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} |
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} |
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/** |
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* cy82c693_set_dmamode - set initial DMA mode data |
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* @ap: ATA interface |
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* @adev: ATA device |
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* |
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* Called to do the DMA mode setup. |
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*/ |
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static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
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{ |
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int reg = CY82_INDEX_CHANNEL0 + ap->port_no; |
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/* Be afraid, be very afraid. Magic registers in low I/O space */ |
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outb(reg, 0x22); |
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outb(adev->dma_mode - XFER_MW_DMA_0, 0x23); |
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/* 0x50 gives the best behaviour on the Alpha's using this chip */ |
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outb(CY82_INDEX_TIMEOUT, 0x22); |
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outb(0x50, 0x23); |
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} |
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static struct scsi_host_template cy82c693_sht = { |
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ATA_BMDMA_SHT(DRV_NAME), |
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}; |
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static struct ata_port_operations cy82c693_port_ops = { |
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.inherits = &ata_bmdma_port_ops, |
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.cable_detect = ata_cable_40wire, |
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.set_piomode = cy82c693_set_piomode, |
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.set_dmamode = cy82c693_set_dmamode, |
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}; |
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static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id) |
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{ |
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static const struct ata_port_info info = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, |
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.mwdma_mask = ATA_MWDMA2, |
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.port_ops = &cy82c693_port_ops |
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}; |
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const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; |
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/* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. |
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For the moment we don't handle the secondary. FIXME */ |
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if (PCI_FUNC(pdev->devfn) != 1) |
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return -ENODEV; |
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return ata_pci_bmdma_init_one(pdev, ppi, &cy82c693_sht, NULL, 0); |
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} |
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static const struct pci_device_id cy82c693[] = { |
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{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), }, |
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{ }, |
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}; |
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static struct pci_driver cy82c693_pci_driver = { |
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.name = DRV_NAME, |
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.id_table = cy82c693, |
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.probe = cy82c693_init_one, |
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.remove = ata_pci_remove_one, |
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#ifdef CONFIG_PM_SLEEP |
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.suspend = ata_pci_device_suspend, |
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.resume = ata_pci_device_resume, |
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#endif |
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}; |
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module_pci_driver(cy82c693_pci_driver); |
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MODULE_AUTHOR("Alan Cox"); |
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MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DEVICE_TABLE(pci, cy82c693); |
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MODULE_VERSION(DRV_VERSION);
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