Logo Search packages:      
Sourcecode: linux version File versions  Download package

pata_marvell.c

/*
 *    Marvell PATA driver.
 *
 *    For the moment we drive the PATA port in legacy mode. That
 *    isn't making full use of the device functionality but it is
 *    easy to get working.
 *
 *    (c) 2006 Red Hat  <alan@redhat.com>
 */

#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 <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/ata.h>

#define DRV_NAME  "pata_marvell"
#define DRV_VERSION     "0.1.4"

/**
 *    marvell_pre_reset -     check for 40/80 pin
 *    @link: link
 *    @deadline: deadline jiffies for the operation
 *
 *    Perform the PATA port setup we need.
 */

static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
{
      struct ata_port *ap = link->ap;
      struct pci_dev *pdev = to_pci_dev(ap->host->dev);
      u32 devices;
      void __iomem *barp;
      int i;

      /* Check if our port is enabled */

      barp = pci_iomap(pdev, 5, 0x10);
      if (barp == NULL)
            return -ENOMEM;
      printk("BAR5:");
      for(i = 0; i <= 0x0F; i++)
            printk("%02X:%02X ", i, ioread8(barp + i));
      printk("\n");

      devices = ioread32(barp + 0x0C);
      pci_iounmap(pdev, barp);

      if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
          (!(devices & 0x10)))      /* PATA enable ? */
            return -ENOENT;

      return ata_std_prereset(link, deadline);
}

static int marvell_cable_detect(struct ata_port *ap)
{
      /* Cable type */
      switch(ap->port_no)
      {
      case 0:
            if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
                  return ATA_CBL_PATA40;
            return ATA_CBL_PATA80;
      case 1: /* Legacy SATA port */
            return ATA_CBL_SATA;
      }

      BUG();
      return 0;   /* Our BUG macro needs the right markup */
}

/**
 *    marvell_error_handler - Setup and error handler
 *    @ap: Port to handle
 *
 *    LOCKING:
 *    None (inherited from caller).
 */

static void marvell_error_handler(struct ata_port *ap)
{
      return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset,
                          NULL, ata_std_postreset);
}

/* No PIO or DMA methods needed for this device */

static struct scsi_host_template marvell_sht = {
      .module                 = THIS_MODULE,
      .name             = DRV_NAME,
      .ioctl                  = ata_scsi_ioctl,
      .queuecommand           = ata_scsi_queuecmd,
      .can_queue        = ATA_DEF_QUEUE,
      .this_id          = ATA_SHT_THIS_ID,
      .sg_tablesize           = LIBATA_MAX_PRD,
      .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
      .emulated         = ATA_SHT_EMULATED,
      .use_clustering         = ATA_SHT_USE_CLUSTERING,
      .proc_name        = DRV_NAME,
      .dma_boundary           = ATA_DMA_BOUNDARY,
      .slave_configure  = ata_scsi_slave_config,
      .slave_destroy          = ata_scsi_slave_destroy,
      /* Use standard CHS mapping rules */
      .bios_param       = ata_std_bios_param,
};

static const struct ata_port_operations marvell_ops = {
      /* Task file is PCI ATA format, use helpers */
      .tf_load          = ata_tf_load,
      .tf_read          = ata_tf_read,
      .check_status           = ata_check_status,
      .exec_command           = ata_exec_command,
      .dev_select       = ata_std_dev_select,

      .freeze                 = ata_bmdma_freeze,
      .thaw             = ata_bmdma_thaw,
      .error_handler          = marvell_error_handler,
      .post_internal_cmd      = ata_bmdma_post_internal_cmd,
      .cable_detect           = marvell_cable_detect,

      /* BMDMA handling is PCI ATA format, use helpers */
      .bmdma_setup            = ata_bmdma_setup,
      .bmdma_start            = ata_bmdma_start,
      .bmdma_stop       = ata_bmdma_stop,
      .bmdma_status           = ata_bmdma_status,
      .qc_prep          = ata_qc_prep,
      .qc_issue         = ata_qc_issue_prot,
      .data_xfer        = ata_data_xfer,

      /* Timeout handling */
      .irq_handler            = ata_interrupt,
      .irq_clear        = ata_bmdma_irq_clear,
      .irq_on                 = ata_irq_on,

      /* Generic PATA PCI ATA helpers */
      .port_start       = ata_sff_port_start,
};


/**
 *    marvell_init_one - Register Marvell ATA PCI device with kernel services
 *    @pdev: PCI device to register
 *    @ent: Entry in marvell_pci_tbl matching with @pdev
 *
 *    Called from kernel PCI layer.
 *
 *    LOCKING:
 *    Inherited from PCI layer (may sleep).
 *
 *    RETURNS:
 *    Zero on success, or -ERRNO value.
 */

static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
      static const struct ata_port_info info = {
            .sht        = &marvell_sht,
            .flags            = ATA_FLAG_SLAVE_POSS,

            .pio_mask   = 0x1f,
            .mwdma_mask = 0x07,
            .udma_mask  = ATA_UDMA5,

            .port_ops   = &marvell_ops,
      };
      static const struct ata_port_info info_sata = {
            .sht        = &marvell_sht,
            /* Slave possible as its magically mapped not real */
            .flags            = ATA_FLAG_SLAVE_POSS,

            .pio_mask   = 0x1f,
            .mwdma_mask = 0x07,
            .udma_mask  = ATA_UDMA6,

            .port_ops   = &marvell_ops,
      };
      const struct ata_port_info *ppi[] = { &info, &info_sata };

      if (pdev->device == 0x6101)
            ppi[1] = &ata_dummy_port_info;

      return ata_pci_init_one(pdev, ppi);
}

static const struct pci_device_id marvell_pci_tbl[] = {
      { PCI_DEVICE(0x11AB, 0x6101), },
      { PCI_DEVICE(0x11AB, 0x6121), },
      { PCI_DEVICE(0x11AB, 0x6123), },
      { PCI_DEVICE(0x11AB, 0x6145), },
      { }   /* terminate list */
};

static struct pci_driver marvell_pci_driver = {
      .name             = DRV_NAME,
      .id_table         = marvell_pci_tbl,
      .probe                  = marvell_init_one,
      .remove                 = ata_pci_remove_one,
#ifdef CONFIG_PM
      .suspend          = ata_pci_device_suspend,
      .resume                 = ata_pci_device_resume,
#endif
};

static int __init marvell_init(void)
{
      return pci_register_driver(&marvell_pci_driver);
}

static void __exit marvell_exit(void)
{
      pci_unregister_driver(&marvell_pci_driver);
}

module_init(marvell_init);
module_exit(marvell_exit);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
MODULE_VERSION(DRV_VERSION);


Generated by  Doxygen 1.6.0   Back to index