24dc5f33ea
Update libata LLDs to use devres. Core layer is already converted to
support managed LLDs. This patch simplifies initialization and fixes
many resource related bugs in init failure and detach path. For
example, all converted drivers now handle ata_device_add() failure
gracefully without excessive resource rollback code.
As most resources are released automatically on driver detach, many
drivers don't need or can do with much simpler ->{port|host}_stop().
In general, stop callbacks are need iff port or host needs to be given
commands to shut it down. Note that freezing is enough in many cases
and ports are automatically frozen before being detached.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
155 lines
3.7 KiB
C
155 lines
3.7 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 "0.1.5"
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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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.port_disable = ata_port_disable,
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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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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_pio_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.port_start = ata_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_probe_ent ae;
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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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memset(&ae, 0, sizeof(struct ata_probe_ent));
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INIT_LIST_HEAD(&ae.node);
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ae.dev = &idev->dev;
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ae.port_ops = &isapnp_port_ops;
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ae.sht = &isapnp_sht;
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ae.n_ports = 1;
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ae.pio_mask = 1; /* ISA so PIO 0 cycles */
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ae.irq = pnp_irq(idev, 0);
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ae.irq_flags = 0;
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ae.port_flags = ATA_FLAG_SLAVE_POSS;
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ae.port[0].cmd_addr = pnp_port_start(idev, 0);
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if (pnp_port_valid(idev, 1) == 0) {
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ae.port[0].altstatus_addr = pnp_port_start(idev, 1);
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ae.port[0].ctl_addr = pnp_port_start(idev, 1);
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ae.port_flags |= ATA_FLAG_SRST;
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}
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ata_std_ports(&ae.port[0]);
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if (ata_device_add(&ae) == 0)
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return -ENODEV;
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return 0;
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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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dev_set_drvdata(dev, NULL);
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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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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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