cbcdd87593
Currently, port configuration reporting has the following problems. * iomapped address is reported instead of raw address * report contains irrelevant fields or lacks necessary fields for non-SFF controllers. * host->irq/irq2 are there just for reporting and hacky. This patch implements and uses ata_port_desc() and ata_port_pbar_desc(). ata_port_desc() is almost identical to ata_ehi_push_desc() except that it takes @ap instead of @ehi, has no locking requirement, can only be used during host initialization and " " is used as separator instead of ", ". ata_port_pbar_desc() is a helper to ease reporting of a PCI BAR or an offsetted address into it. LLD pushes whatever description it wants using the above two functions. The accumulated description is printed on host registration after "[S/P]ATA max MAX_XFERMODE ". SFF init helpers and ata_host_activate() automatically add descriptions for addresses and irq respectively, so only LLDs which isn't standard SFF need to add custom descriptions. In many cases, such controllers need to report different things anyway. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
170 lines
4 KiB
C
170 lines
4 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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.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 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_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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/**
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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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if (pnp_port_valid(idev, 0) == 0)
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return -ENODEV;
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/* FIXME: Should selected polled PIO here not fail */
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if (pnp_irq_valid(idev, 0) == 0)
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return -ENODEV;
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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, pnp_irq(idev, 0), ata_interrupt, 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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