/* * pata_opti.c - ATI PATA for new ATA layer * (C) 2005 Red Hat Inc * Alan Cox <alan@redhat.com> * * Based on * linux/drivers/ide/pci/opti621.c Version 0.7 Sept 10, 2002 * * Copyright (C) 1996-1998 Linus Torvalds & authors (see below) * * Authors: * Jaromir Koutek <miri@punknet.cz>, * Jan Harkes <jaharkes@cwi.nl>, * Mark Lord <mlord@pobox.com> * Some parts of code are from ali14xx.c and from rz1000.c. * * Also consulted the FreeBSD prototype driver by Kevin Day to try * and resolve some confusions. Further documentation can be found in * Ralf Brown's interrupt list * * If you have other variants of the Opti range (Viper/Vendetta) please * try this driver with those PCI idents and report back. For the later * chips see the pata_optidma driver * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME "pata_opti" #define DRV_VERSION "0.2.9" enum { READ_REG = 0, /* index of Read cycle timing register */ WRITE_REG = 1, /* index of Write cycle timing register */ CNTRL_REG = 3, /* index of Control register */ STRAP_REG = 5, /* index of Strap register */ MISC_REG = 6 /* index of Miscellaneous register */ }; /** * opti_pre_reset - probe begin * @ap: ATA port * @deadline: deadline jiffies for the operation * * Set up cable type and use generic probe init */ static int opti_pre_reset(struct ata_port *ap, unsigned long deadline) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); static const struct pci_bits opti_enable_bits[] = { { 0x45, 1, 0x80, 0x00 }, { 0x40, 1, 0x08, 0x00 } }; if (!pci_test_config_bits(pdev, &opti_enable_bits[ap->port_no])) return -ENOENT; return ata_std_prereset(ap, deadline); } /** * opti_probe_reset - probe reset * @ap: ATA port * * Perform the ATA probe and bus reset sequence plus specific handling * for this hardware. The Opti needs little handling - we have no UDMA66 * capability that needs cable detection. All we must do is check the port * is enabled. */ static void opti_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, opti_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * opti_write_reg - control register setup * @ap: ATA port * @value: value * @reg: control register number * * The Opti uses magic 'trapdoor' register accesses to do configuration * rather than using PCI space as other controllers do. The double inw * on the error register activates configuration mode. We can then write * the control register */ static void opti_write_reg(struct ata_port *ap, u8 val, int reg) { void __iomem *regio = ap->ioaddr.cmd_addr; /* These 3 unlock the control register access */ ioread16(regio + 1); ioread16(regio + 1); iowrite8(3, regio + 2); /* Do the I/O */ iowrite8(val, regio + reg); /* Relock */ iowrite8(0x83, regio + 2); } /** * opti_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Called to do the PIO mode setup. Timing numbers are taken from * the FreeBSD driver then pre computed to keep the code clean. There * are two tables depending on the hardware clock speed. */ static void opti_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct ata_device *pair = ata_dev_pair(adev); int clock; int pio = adev->pio_mode - XFER_PIO_0; void __iomem *regio = ap->ioaddr.cmd_addr; u8 addr; /* Address table precomputed with prefetch off and a DCLK of 2 */ static const u8 addr_timing[2][5] = { { 0x30, 0x20, 0x20, 0x10, 0x10 }, { 0x20, 0x20, 0x10, 0x10, 0x10 } }; static const u8 data_rec_timing[2][5] = { { 0x6B, 0x56, 0x42, 0x32, 0x31 }, { 0x58, 0x44, 0x32, 0x22, 0x21 } }; iowrite8(0xff, regio + 5); clock = ioread16(regio + 5) & 1; /* * As with many controllers the address setup time is shared * and must suit both devices if present. */ addr = addr_timing[clock][pio]; if (pair) { /* Hardware constraint */ u8 pair_addr = addr_timing[clock][pair->pio_mode - XFER_PIO_0]; if (pair_addr > addr) addr = pair_addr; } /* Commence primary programming sequence */ opti_write_reg(ap, adev->devno, MISC_REG); opti_write_reg(ap, data_rec_timing[clock][pio], READ_REG); opti_write_reg(ap, data_rec_timing[clock][pio], WRITE_REG); opti_write_reg(ap, addr, MISC_REG); /* Programming sequence complete, override strapping */ opti_write_reg(ap, 0x85, CNTRL_REG); } static struct scsi_host_template opti_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, }; static struct ata_port_operations opti_port_ops = { .port_disable = ata_port_disable, .set_piomode = opti_set_piomode, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = opti_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .cable_detect = ata_cable_40wire, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .irq_on = ata_irq_on, .irq_ack = ata_irq_ack, .port_start = ata_port_start, }; static int opti_init_one(struct pci_dev *dev, const struct pci_device_id *id) { static const struct ata_port_info info = { .sht = &opti_sht, .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = 0x1f, .port_ops = &opti_port_ops }; const struct ata_port_info *ppi[] = { &info, NULL }; static int printed_version; if (!printed_version++) dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n"); return ata_pci_init_one(dev, ppi); } static const struct pci_device_id opti[] = { { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 }, { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 1 }, { }, }; static struct pci_driver opti_pci_driver = { .name = DRV_NAME, .id_table = opti, .probe = opti_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; static int __init opti_init(void) { return pci_register_driver(&opti_pci_driver); } static void __exit opti_exit(void) { pci_unregister_driver(&opti_pci_driver); } MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for Opti 621/621X"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, opti); MODULE_VERSION(DRV_VERSION); module_init(opti_init); module_exit(opti_exit);