/* * pata_efar.c - EFAR PIIX clone controller driver * * (C) 2005 Red Hat <alan@redhat.com> * * Some parts based on ata_piix.c by Jeff Garzik and others. * * The EFAR is a PIIX4 clone with UDMA66 support. Unlike the later * Intel ICH controllers the EFAR widened the UDMA mode register bits * and doesn't require the funky clock selection. */ #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 <linux/device.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <linux/ata.h> #define DRV_NAME "pata_efar" #define DRV_VERSION "0.4.3" /** * efar_pre_reset - check for 40/80 pin * @ap: Port * * Perform cable detection for the EFAR ATA interface. This is * different to the PIIX arrangement */ static int efar_pre_reset(struct ata_port *ap) { static const struct pci_bits efar_enable_bits[] = { { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */ }; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; if (!pci_test_config_bits(pdev, &efar_enable_bits[ap->port_no])) return -ENOENT; pci_read_config_byte(pdev, 0x47, &tmp); if (tmp & (2 >> ap->port_no)) ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; return ata_std_prereset(ap); } /** * efar_probe_reset - Probe specified port on PATA host controller * @ap: Port to probe * * LOCKING: * None (inherited from caller). */ static void efar_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, efar_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * efar_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: um * * Set PIO mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev) { unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *dev = to_pci_dev(ap->host->dev); unsigned int idetm_port= ap->port_no ? 0x42 : 0x40; u16 idetm_data; int control = 0; /* * See Intel Document 298600-004 for the timing programing rules * for PIIX/ICH. The EFAR is a clone so very similar */ static const /* ISP RTC */ u8 timings[][2] = { { 0, 0 }, { 0, 0 }, { 1, 0 }, { 2, 1 }, { 2, 3 }, }; if (pio > 2) control |= 1; /* TIME1 enable */ if (ata_pio_need_iordy(adev)) /* PIO 3/4 require IORDY */ control |= 2; /* IE enable */ /* Intel specifies that the PPE functionality is for disk only */ if (adev->class == ATA_DEV_ATA) control |= 4; /* PPE enable */ pci_read_config_word(dev, idetm_port, &idetm_data); /* Enable PPE, IE and TIME as appropriate */ if (adev->devno == 0) { idetm_data &= 0xCCF0; idetm_data |= control; idetm_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8); } else { int shift = 4 * ap->port_no; u8 slave_data; idetm_data &= 0xCC0F; idetm_data |= (control << 4); /* Slave timing in seperate register */ pci_read_config_byte(dev, 0x44, &slave_data); slave_data &= 0x0F << shift; slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << shift; pci_write_config_byte(dev, 0x44, slave_data); } idetm_data |= 0x4000; /* Ensure SITRE is enabled */ pci_write_config_word(dev, idetm_port, idetm_data); } /** * efar_set_dmamode - Initialize host controller PATA DMA timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set UDMA/MWDMA mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev) { struct pci_dev *dev = to_pci_dev(ap->host->dev); u8 master_port = ap->port_no ? 0x42 : 0x40; u16 master_data; u8 speed = adev->dma_mode; int devid = adev->devno + 2 * ap->port_no; u8 udma_enable; static const /* ISP RTC */ u8 timings[][2] = { { 0, 0 }, { 0, 0 }, { 1, 0 }, { 2, 1 }, { 2, 3 }, }; pci_read_config_word(dev, master_port, &master_data); pci_read_config_byte(dev, 0x48, &udma_enable); if (speed >= XFER_UDMA_0) { unsigned int udma = adev->dma_mode - XFER_UDMA_0; u16 udma_timing; udma_enable |= (1 << devid); /* Load the UDMA mode number */ pci_read_config_word(dev, 0x4A, &udma_timing); udma_timing &= ~(7 << (4 * devid)); udma_timing |= udma << (4 * devid); pci_write_config_word(dev, 0x4A, udma_timing); } else { /* * MWDMA is driven by the PIO timings. We must also enable * IORDY unconditionally along with TIME1. PPE has already * been set when the PIO timing was set. */ unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0; unsigned int control; u8 slave_data; const unsigned int needed_pio[3] = { XFER_PIO_0, XFER_PIO_3, XFER_PIO_4 }; int pio = needed_pio[mwdma] - XFER_PIO_0; control = 3; /* IORDY|TIME1 */ /* If the drive MWDMA is faster than it can do PIO then we must force PIO into PIO0 */ if (adev->pio_mode < needed_pio[mwdma]) /* Enable DMA timing only */ control |= 8; /* PIO cycles in PIO0 */ if (adev->devno) { /* Slave */ master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */ master_data |= control << 4; pci_read_config_byte(dev, 0x44, &slave_data); slave_data &= (0x0F + 0xE1 * ap->port_no); /* Load the matching timing */ slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0); pci_write_config_byte(dev, 0x44, slave_data); } else { /* Master */ master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY and master timing bits */ master_data |= control; master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8); } udma_enable &= ~(1 << devid); pci_write_config_word(dev, master_port, master_data); } pci_write_config_byte(dev, 0x48, udma_enable); } static struct scsi_host_template efar_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, #ifdef CONFIG_PM .resume = ata_scsi_device_resume, .suspend = ata_scsi_device_suspend, #endif }; static const struct ata_port_operations efar_ops = { .port_disable = ata_port_disable, .set_piomode = efar_set_piomode, .set_dmamode = efar_set_dmamode, .mode_filter = ata_pci_default_filter, .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 = efar_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .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, }; /** * efar_init_one - Register EFAR ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in efar_pci_tbl matching with @pdev * * Called from kernel PCI layer. * * LOCKING: * Inherited from PCI layer (may sleep). * * RETURNS: * Zero on success, or -ERRNO value. */ static int efar_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version; static struct ata_port_info info = { .sht = &efar_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma1-2 */ .udma_mask = 0x0f, /* UDMA 66 */ .port_ops = &efar_ops, }; static struct ata_port_info *port_info[2] = { &info, &info }; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); return ata_pci_init_one(pdev, port_info, 2); } static const struct pci_device_id efar_pci_tbl[] = { { PCI_VDEVICE(EFAR, 0x9130), }, { } /* terminate list */ }; static struct pci_driver efar_pci_driver = { .name = DRV_NAME, .id_table = efar_pci_tbl, .probe = efar_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; static int __init efar_init(void) { return pci_register_driver(&efar_pci_driver); } static void __exit efar_exit(void) { pci_unregister_driver(&efar_pci_driver); } module_init(efar_init); module_exit(efar_exit); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("SCSI low-level driver for EFAR PIIX clones"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, efar_pci_tbl); MODULE_VERSION(DRV_VERSION);