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68d1d07b51
libata lets low level drivers build scsi_host_template and register it to the SCSI layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This patch implements SHT initializers which can be used to initialize all the boilerplate entries in a sht. Three variants of them are implemented - BASE, BMDMA and NCQ - for different types of drivers. Note that entries can be overriden by putting individual initializers after the helper macro. All sht tables are identical before and after this patch. Signed-off-by: Tejun Heo <htejun@gmail.com>
158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
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/*
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* pata-isapnp.c - ISA PnP PATA controller driver.
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* Copyright 2005/2006 Red Hat Inc <alan@redhat.com>, all rights reserved.
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*
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* Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
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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/isapnp.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/ata.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_isapnp"
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#define DRV_VERSION "0.2.2"
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static struct scsi_host_template isapnp_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations isapnp_port_ops = {
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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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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_data_xfer,
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.irq_clear = ata_noop_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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/**
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* isapnp_init_one - attach an isapnp interface
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* @idev: PnP device
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* @dev_id: matching detect line
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*
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* Register an ISA bus IDE interface. Such interfaces are PIO 0 and
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* non shared IRQ.
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*/
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static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
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{
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struct ata_host *host;
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struct ata_port *ap;
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void __iomem *cmd_addr, *ctl_addr;
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int irq = 0;
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irq_handler_t handler = NULL;
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if (pnp_port_valid(idev, 0) == 0)
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return -ENODEV;
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if (pnp_irq_valid(idev, 0)) {
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irq = pnp_irq(idev, 0);
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handler = ata_interrupt;
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}
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/* allocate host */
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host = ata_host_alloc(&idev->dev, 1);
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if (!host)
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return -ENOMEM;
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/* acquire resources and fill host */
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cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
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if (!cmd_addr)
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return -ENOMEM;
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ap = host->ports[0];
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ap->ops = &isapnp_port_ops;
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ap->pio_mask = 1;
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ap->flags |= ATA_FLAG_SLAVE_POSS;
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ap->ioaddr.cmd_addr = cmd_addr;
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if (pnp_port_valid(idev, 1) == 0) {
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ctl_addr = devm_ioport_map(&idev->dev,
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pnp_port_start(idev, 1), 1);
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ap->ioaddr.altstatus_addr = ctl_addr;
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ap->ioaddr.ctl_addr = ctl_addr;
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}
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ata_std_ports(&ap->ioaddr);
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ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
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(unsigned long long)pnp_port_start(idev, 0),
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(unsigned long long)pnp_port_start(idev, 1));
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/* activate */
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return ata_host_activate(host, irq, handler, 0,
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&isapnp_sht);
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}
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/**
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* isapnp_remove_one - unplug an isapnp interface
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* @idev: PnP device
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*
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* Remove a previously configured PnP ATA port. Called only on module
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* unload events as the core does not currently deal with ISAPnP docking.
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*/
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static void isapnp_remove_one(struct pnp_dev *idev)
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{
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struct device *dev = &idev->dev;
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struct ata_host *host = dev_get_drvdata(dev);
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ata_host_detach(host);
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}
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static struct pnp_device_id isapnp_devices[] = {
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/* Generic ESDI/IDE/ATA compatible hard disk controller */
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{.id = "PNP0600", .driver_data = 0},
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{.id = ""}
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};
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MODULE_DEVICE_TABLE(pnp, isapnp_devices);
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static struct pnp_driver isapnp_driver = {
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.name = DRV_NAME,
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.id_table = isapnp_devices,
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.probe = isapnp_init_one,
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.remove = isapnp_remove_one,
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};
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static int __init isapnp_init(void)
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{
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return pnp_register_driver(&isapnp_driver);
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}
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static void __exit isapnp_exit(void)
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{
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pnp_unregister_driver(&isapnp_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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module_init(isapnp_init);
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module_exit(isapnp_exit);
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