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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [ata/] [pata_cypress.c] - Blame information for rev 65

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Line No. Rev Author Line
1 62 marcus.erl
/*
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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 <alan@redhat.com>
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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/init.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 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
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        time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 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 |= FIT(t.setup, 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 |= (FIT(t.setup, 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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        .module                 = THIS_MODULE,
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        .name                   = DRV_NAME,
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        .ioctl                  = ata_scsi_ioctl,
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        .queuecommand           = ata_scsi_queuecmd,
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        .can_queue              = ATA_DEF_QUEUE,
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        .this_id                = ATA_SHT_THIS_ID,
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        .sg_tablesize           = LIBATA_MAX_PRD,
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        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
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        .emulated               = ATA_SHT_EMULATED,
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        .use_clustering         = ATA_SHT_USE_CLUSTERING,
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        .proc_name              = DRV_NAME,
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        .dma_boundary           = ATA_DMA_BOUNDARY,
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        .slave_configure        = ata_scsi_slave_config,
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        .slave_destroy          = ata_scsi_slave_destroy,
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        .bios_param             = ata_std_bios_param,
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};
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static struct ata_port_operations cy82c693_port_ops = {
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        .set_piomode    = cy82c693_set_piomode,
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        .set_dmamode    = cy82c693_set_dmamode,
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        .mode_filter    = ata_pci_default_filter,
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        .tf_load        = ata_tf_load,
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        .tf_read        = ata_tf_read,
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        .check_status   = ata_check_status,
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        .exec_command   = ata_exec_command,
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        .dev_select     = ata_std_dev_select,
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        .freeze         = ata_bmdma_freeze,
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        .thaw           = ata_bmdma_thaw,
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        .error_handler  = ata_bmdma_error_handler,
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        .post_internal_cmd = ata_bmdma_post_internal_cmd,
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        .cable_detect   = ata_cable_40wire,
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        .bmdma_setup    = ata_bmdma_setup,
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        .bmdma_start    = ata_bmdma_start,
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        .bmdma_stop     = ata_bmdma_stop,
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        .bmdma_status   = ata_bmdma_status,
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152
        .qc_prep        = ata_qc_prep,
153
        .qc_issue       = ata_qc_issue_prot,
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155
        .data_xfer      = ata_data_xfer,
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        .irq_handler    = ata_interrupt,
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        .irq_clear      = ata_bmdma_irq_clear,
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        .irq_on         = ata_irq_on,
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        .port_start     = ata_sff_port_start,
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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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                .sht = &cy82c693_sht,
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                .flags = ATA_FLAG_SLAVE_POSS,
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                .pio_mask = 0x1f,
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                .mwdma_mask = 0x07,
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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 };
174
 
175
        /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
176
           For the moment we don't handle the secondary. FIXME */
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178
        if (PCI_FUNC(pdev->devfn) != 1)
179
                return -ENODEV;
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181
        return ata_pci_init_one(pdev, ppi);
182
}
183
 
184
static const struct pci_device_id cy82c693[] = {
185
        { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
186
 
187
        { },
188
};
189
 
190
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
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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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201
static int __init cy82c693_init(void)
202
{
203
        return pci_register_driver(&cy82c693_pci_driver);
204
}
205
 
206
 
207
static void __exit cy82c693_exit(void)
208
{
209
        pci_unregister_driver(&cy82c693_pci_driver);
210
}
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212
 
213
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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219
module_init(cy82c693_init);
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module_exit(cy82c693_exit);

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