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Release 4.10 drivers/ata/pata_cypress.c

Directory: drivers/ata
/*
 * 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); } }

Contributors

PersonTokensPropCommitsCommitProp
jeff garzikjeff garzik27793.90%133.33%
bartlomiej zolnierkiewiczbartlomiej zolnierkiewicz124.07%133.33%
harvey harrisonharvey harrison62.03%133.33%
Total295100.00%3100.00%

/** * 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); }

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jeff garzikjeff garzik59100.00%1100.00%
Total59100.00%1100.00%

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); }

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jeff garzikjeff garzik7480.43%225.00%
tejun heotejun heo1415.22%450.00%
erik inge bolsoerik inge bolso22.17%112.50%
alan coxalan cox22.17%112.50%
Total92100.00%8100.00%

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);

Overall Contributors

PersonTokensPropCommitsCommitProp
jeff garzikjeff garzik59888.86%313.64%
tejun heotejun heo324.75%940.91%
alan coxalan cox182.67%418.18%
bartlomiej zolnierkiewiczbartlomiej zolnierkiewicz131.93%29.09%
harvey harrisonharvey harrison60.89%14.55%
akira iguchiakira iguchi30.45%14.55%
erik inge bolsoerik inge bolso20.30%14.55%
axel linaxel lin10.15%14.55%
Total673100.00%22100.00%
Directory: drivers/ata
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