/* * pata_artop.c - ARTOP ATA controller driver * * (C) 2006 Red Hat <alan@redhat.com> * * Based in part on drivers/ide/pci/aec62xx.c * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org> * 865/865R fixes for Macintosh card version from a patch to the old * driver by Thibaut VARENE <varenet@parisc-linux.org> * When setting the PCI latency we must set 0x80 or higher for burst * performance Alessandro Zummo <alessandro.zummo@towertech.it> * * TODO * 850 serialization once the core supports it * Investigate no_dsc on 850R * Clock detect */ #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_artop" #define DRV_VERSION "0.4.2" /* * The ARTOP has 33 Mhz and "over clocked" timing tables. Until we * get PCI bus speed functionality we leave this as 0. Its a variable * for when we get the functionality and also for folks wanting to * test stuff. */ static int clock = 0; static int artop6210_pre_reset(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); const struct pci_bits artop_enable_bits[] = { { 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */ { 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */ }; if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no])) return -ENOENT; ap->cbl = ATA_CBL_PATA40; return ata_std_prereset(ap); } /** * artop6210_error_handler - Probe specified port on PATA host controller * @ap: Port to probe * * LOCKING: * None (inherited from caller). */ static void artop6210_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, artop6210_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * artop6260_pre_reset - check for 40/80 pin * @ap: Port * * The ARTOP hardware reports the cable detect bits in register 0x49. * Nothing complicated needed here. */ static int artop6260_pre_reset(struct ata_port *ap) { static const struct pci_bits artop_enable_bits[] = { { 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */ { 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */ }; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; /* Odd numbered device ids are the units with enable bits (the -R cards) */ if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no])) return -ENOENT; pci_read_config_byte(pdev, 0x49, &tmp); if (tmp & (1 << ap->port_no)) ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; return ata_std_prereset(ap); } /** * artop6260_error_handler - Probe specified port on PATA host controller * @ap: Port to probe * * LOCKING: * None (inherited from caller). */ static void artop6260_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, artop6260_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * artop6210_load_piomode - Load a set of PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device * @pio: PIO mode * * Set PIO mode for device, in host controller PCI config space. This * is used both to set PIO timings in PIO mode and also to set the * matching PIO clocking for UDMA, as well as the MWDMA timings. * * LOCKING: * None (inherited from caller). */ static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; const u16 timing[2][5] = { { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 }, { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 } }; /* Load the PIO timing active/recovery bits */ pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]); } /** * artop6210_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set PIO mode for device, in host controller PCI config space. For * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In * the event UDMA is used the later call to set_dmamode will set the * bits as required. * * LOCKING: * None (inherited from caller). */ static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; u8 ultra; artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0); /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */ pci_read_config_byte(pdev, 0x54, &ultra); ultra &= ~(3 << (2 * dn)); pci_write_config_byte(pdev, 0x54, ultra); } /** * artop6260_load_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * @pio: PIO mode * * Set PIO mode for device, in host controller PCI config space. The * ARTOP6260 and relatives store the timing data differently. * * LOCKING: * None (inherited from caller). */ static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; const u8 timing[2][5] = { { 0x00, 0x0A, 0x08, 0x33, 0x31 }, { 0x70, 0x7A, 0x78, 0x43, 0x41 } }; /* Load the PIO timing active/recovery bits */ pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]); } /** * artop6260_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set PIO mode for device, in host controller PCI config space. For * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In * the event UDMA is used the later call to set_dmamode will set the * bits as required. * * LOCKING: * None (inherited from caller). */ static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ultra; artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0); /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */ pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra); ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */ pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra); } /** * artop6210_set_dmamode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: um * * Set DMA mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */ static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev) { unsigned int pio; struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; u8 ultra; if (adev->dma_mode == XFER_MW_DMA_0) pio = 1; else pio = 4; /* Load the PIO timing active/recovery bits */ artop6210_load_piomode(ap, adev, pio); pci_read_config_byte(pdev, 0x54, &ultra); ultra &= ~(3 << (2 * dn)); /* Add ultra DMA bits if in UDMA mode */ if (adev->dma_mode >= XFER_UDMA_0) { u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock; if (mode == 0) mode = 1; ultra |= (mode << (2 * dn)); } pci_write_config_byte(pdev, 0x54, ultra); } /** * artop6260_set_dmamode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set DMA mode for device, in host controller PCI config space. The * ARTOP6260 and relatives store the timing data differently. * * LOCKING: * None (inherited from caller). */ static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev) { unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ultra; if (adev->dma_mode == XFER_MW_DMA_0) pio = 1; else pio = 4; /* Load the PIO timing active/recovery bits */ artop6260_load_piomode(ap, adev, pio); /* Add ultra DMA bits if in UDMA mode */ pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra); ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */ if (adev->dma_mode >= XFER_UDMA_0) { u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock; if (mode == 0) mode = 1; ultra |= (mode << (4 * adev->devno)); } pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra); } static struct scsi_host_template artop_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 const struct ata_port_operations artop6210_ops = { .port_disable = ata_port_disable, .set_piomode = artop6210_set_piomode, .set_dmamode = artop6210_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 = artop6210_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_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; static const struct ata_port_operations artop6260_ops = { .port_disable = ata_port_disable, .set_piomode = artop6260_set_piomode, .set_dmamode = artop6260_set_dmamode, .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 = artop6260_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_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; /** * artop_init_one - Register ARTOP ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in artop_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 artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id) { static int printed_version; static struct ata_port_info info_6210 = { .sht = &artop_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = ATA_UDMA2, .port_ops = &artop6210_ops, }; static struct ata_port_info info_626x = { .sht = &artop_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = ATA_UDMA4, .port_ops = &artop6260_ops, }; static struct ata_port_info info_626x_fast = { .sht = &artop_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = ATA_UDMA5, .port_ops = &artop6260_ops, }; struct ata_port_info *port_info[2]; struct ata_port_info *info = NULL; int ports = 2; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); if (id->driver_data == 0) { /* 6210 variant */ info = &info_6210; /* BIOS may have left us in UDMA, clear it before libata probe */ pci_write_config_byte(pdev, 0x54, 0); /* For the moment (also lacks dsc) */ printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n"); printk(KERN_WARNING "Secondary ATA ports will not be activated.\n"); ports = 1; } else if (id->driver_data == 1) /* 6260 */ info = &info_626x; else if (id->driver_data == 2) { /* 6260 or 6260 + fast */ unsigned long io = pci_resource_start(pdev, 4); u8 reg; info = &info_626x; if (inb(io) & 0x10) info = &info_626x_fast; /* Mac systems come up with some registers not set as we will need them */ /* Clear reset & test bits */ pci_read_config_byte(pdev, 0x49, ®); pci_write_config_byte(pdev, 0x49, reg & ~ 0x30); /* PCI latency must be > 0x80 for burst mode, tweak it * if required. */ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, ®); if (reg <= 0x80) pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90); /* Enable IRQ output and burst mode */ pci_read_config_byte(pdev, 0x4a, ®); pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80); } BUG_ON(info == NULL); port_info[0] = port_info[1] = info; return ata_pci_init_one(pdev, port_info, ports); } static const struct pci_device_id artop_pci_tbl[] = { { PCI_VDEVICE(ARTOP, 0x0005), 0 }, { PCI_VDEVICE(ARTOP, 0x0006), 1 }, { PCI_VDEVICE(ARTOP, 0x0007), 1 }, { PCI_VDEVICE(ARTOP, 0x0008), 2 }, { PCI_VDEVICE(ARTOP, 0x0009), 2 }, { } /* terminate list */ }; static struct pci_driver artop_pci_driver = { .name = DRV_NAME, .id_table = artop_pci_tbl, .probe = artop_init_one, .remove = ata_pci_remove_one, }; static int __init artop_init(void) { return pci_register_driver(&artop_pci_driver); } static void __exit artop_exit(void) { pci_unregister_driver(&artop_pci_driver); } module_init(artop_init); module_exit(artop_exit); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, artop_pci_tbl); MODULE_VERSION(DRV_VERSION);