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>
230 lines
5.8 KiB
C
230 lines
5.8 KiB
C
/*
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* pata_cypress.c - Cypress PATA for new ATA layer
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* (C) 2006 Red Hat Inc
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* Alan Cox <alan@redhat.com>
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*
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* Based heavily on
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* linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002
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*
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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 <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_cypress"
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#define DRV_VERSION "0.1.4"
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/* here are the offset definitions for the registers */
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enum {
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CY82_IDE_CMDREG = 0x04,
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CY82_IDE_ADDRSETUP = 0x48,
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CY82_IDE_MASTER_IOR = 0x4C,
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CY82_IDE_MASTER_IOW = 0x4D,
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CY82_IDE_SLAVE_IOR = 0x4E,
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CY82_IDE_SLAVE_IOW = 0x4F,
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CY82_IDE_MASTER_8BIT = 0x50,
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CY82_IDE_SLAVE_8BIT = 0x51,
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CY82_INDEX_PORT = 0x22,
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CY82_DATA_PORT = 0x23,
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CY82_INDEX_CTRLREG1 = 0x01,
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CY82_INDEX_CHANNEL0 = 0x30,
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CY82_INDEX_CHANNEL1 = 0x31,
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CY82_INDEX_TIMEOUT = 0x32
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};
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static int cy82c693_pre_reset(struct ata_port *ap)
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{
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ap->cbl = ATA_CBL_PATA40;
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return ata_std_prereset(ap);
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}
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static void cy82c693_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, cy82c693_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* cy82c693_set_piomode - set initial PIO mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Called to do the PIO mode setup.
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*/
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static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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struct ata_timing t;
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const unsigned long T = 1000000 / 33;
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short time_16, time_8;
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u32 addr;
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if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {
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printk(KERN_ERR DRV_NAME ": mome computation failed.\n");
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return;
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}
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time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
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time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4);
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if (adev->devno == 0) {
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pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
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addr &= ~0x0F; /* Mask bits */
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addr |= FIT(t.setup, 0, 15);
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pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
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pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
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pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
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pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
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} else {
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pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
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addr &= ~0xF0; /* Mask bits */
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addr |= (FIT(t.setup, 0, 15) << 4);
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pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
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pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
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}
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}
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/**
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* cy82c693_set_dmamode - set initial DMA mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Called to do the DMA mode setup.
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*/
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static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
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/* Be afraid, be very afraid. Magic registers in low I/O space */
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outb(reg, 0x22);
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outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
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/* 0x50 gives the best behaviour on the Alpha's using this chip */
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outb(CY82_INDEX_TIMEOUT, 0x22);
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outb(0x50, 0x23);
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}
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static struct scsi_host_template cy82c693_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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.resume = ata_scsi_device_resume,
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.suspend = ata_scsi_device_suspend,
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};
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static struct ata_port_operations cy82c693_port_ops = {
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.port_disable = ata_port_disable,
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.set_piomode = cy82c693_set_piomode,
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.set_dmamode = cy82c693_set_dmamode,
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.mode_filter = ata_pci_default_filter,
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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 = cy82c693_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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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_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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static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static struct ata_port_info info = {
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.sht = &cy82c693_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.port_ops = &cy82c693_port_ops
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};
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static struct ata_port_info *port_info[1] = { &info };
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/* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
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For the moment we don't handle the secondary. FIXME */
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if (PCI_FUNC(pdev->devfn) != 1)
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return -ENODEV;
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return ata_pci_init_one(pdev, port_info, 1);
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}
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static const struct pci_device_id cy82c693[] = {
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{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
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{ },
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};
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static struct pci_driver cy82c693_pci_driver = {
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.name = DRV_NAME,
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.id_table = cy82c693,
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.probe = cy82c693_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 cy82c693_init(void)
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{
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return pci_register_driver(&cy82c693_pci_driver);
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}
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static void __exit cy82c693_exit(void)
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{
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pci_unregister_driver(&cy82c693_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, cy82c693);
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MODULE_VERSION(DRV_VERSION);
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module_init(cy82c693_init);
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module_exit(cy82c693_exit);
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