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>
177 lines
4.4 KiB
C
177 lines
4.4 KiB
C
/*
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* pata_netcell.c - Netcell PATA driver
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*
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* (c) 2006 Red Hat <alan@redhat.com>
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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 <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/ata.h>
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#define DRV_NAME "pata_netcell"
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#define DRV_VERSION "0.1.6"
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/**
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* netcell_probe_init - check for 40/80 pin
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* @ap: Port
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*
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* Cables are handled by the RAID controller. Report 80 pin.
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*/
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static int netcell_pre_reset(struct ata_port *ap)
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{
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ap->cbl = ATA_CBL_PATA80;
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return ata_std_prereset(ap);
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}
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/**
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* netcell_probe_reset - Probe specified port on PATA host controller
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* @ap: Port to probe
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void netcell_error_handler(struct ata_port *ap)
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{
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return ata_bmdma_drive_eh(ap, netcell_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/* No PIO or DMA methods needed for this device */
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static struct scsi_host_template netcell_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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/* Use standard CHS mapping rules */
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.bios_param = ata_std_bios_param,
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.resume = ata_scsi_device_resume,
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.suspend = ata_scsi_device_suspend,
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};
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static const struct ata_port_operations netcell_ops = {
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.port_disable = ata_port_disable,
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/* Task file is PCI ATA format, use helpers */
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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 = netcell_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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/* BMDMA handling is PCI ATA format, use helpers */
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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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.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-related hooks */
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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/* Generic PATA PCI ATA helpers */
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.port_start = ata_port_start,
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};
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/**
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* netcell_init_one - Register Netcell ATA PCI device with kernel services
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* @pdev: PCI device to register
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* @ent: Entry in netcell_pci_tbl matching with @pdev
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*
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* Called from kernel PCI layer.
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*
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* LOCKING:
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* Inherited from PCI layer (may sleep).
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*
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* RETURNS:
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* Zero on success, or -ERRNO value.
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*/
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static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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static int printed_version;
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static struct ata_port_info info = {
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.sht = &netcell_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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/* Actually we don't really care about these as the
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firmware deals with it */
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.pio_mask = 0x1f, /* pio0-4 */
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.mwdma_mask = 0x07, /* mwdma0-2 */
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.udma_mask = 0x3f, /* UDMA 133 */
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.port_ops = &netcell_ops,
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};
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static struct ata_port_info *port_info[2] = { &info, &info };
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if (!printed_version++)
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dev_printk(KERN_DEBUG, &pdev->dev,
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"version " DRV_VERSION "\n");
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/* Any chip specific setup/optimisation/messages here */
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ata_pci_clear_simplex(pdev);
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/* And let the library code do the work */
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return ata_pci_init_one(pdev, port_info, 2);
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}
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static const struct pci_device_id netcell_pci_tbl[] = {
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{ PCI_VDEVICE(NETCELL, PCI_DEVICE_ID_REVOLUTION), },
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{ } /* terminate list */
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};
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static struct pci_driver netcell_pci_driver = {
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.name = DRV_NAME,
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.id_table = netcell_pci_tbl,
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.probe = netcell_init_one,
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.remove = ata_pci_remove_one,
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.suspend = ata_pci_device_suspend,
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.resume = ata_pci_device_resume,
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};
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static int __init netcell_init(void)
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{
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return pci_register_driver(&netcell_pci_driver);
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}
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static void __exit netcell_exit(void)
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{
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pci_unregister_driver(&netcell_pci_driver);
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}
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module_init(netcell_init);
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module_exit(netcell_exit);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("SCSI low-level driver for Netcell PATA RAID");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, netcell_pci_tbl);
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MODULE_VERSION(DRV_VERSION);
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