/* * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the * PATA port of the controller. The SATA ports are * driven by AHCI in the usual configuration although * this driver can handle other setups if we need it. * * (c) 2006 Red Hat <alan@redhat.com> */ #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_jmicron" #define DRV_VERSION "0.1.4" typedef enum { PORT_PATA0 = 0, PORT_PATA1 = 1, PORT_SATA = 2, } port_type; /** * jmicron_pre_reset - check for 40/80 pin * @ap: Port * * Perform the PATA port setup we need. * On the Jmicron 361/363 there is a single PATA port that can be mapped * either as primary or secondary (or neither). We don't do any policy * and setup here. We assume that has been done by init_one and the * BIOS. */ static int jmicron_pre_reset(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u32 control; u32 control5; int port_mask = 1<< (4 * ap->port_no); int port = ap->port_no; port_type port_map[2]; /* Check if our port is enabled */ pci_read_config_dword(pdev, 0x40, &control); if ((control & port_mask) == 0) return -ENOENT; /* There are two basic mappings. One has the two SATA ports merged as master/slave and the secondary as PATA, the other has only the SATA port mapped */ if (control & (1 << 23)) { port_map[0] = PORT_SATA; port_map[1] = PORT_PATA0; } else { port_map[0] = PORT_SATA; port_map[1] = PORT_SATA; } /* The 365/366 may have this bit set to map the second PATA port as the internal primary channel */ pci_read_config_dword(pdev, 0x80, &control5); if (control5 & (1<<24)) port_map[0] = PORT_PATA1; /* The two ports may then be logically swapped by the firmware */ if (control & (1 << 22)) port = port ^ 1; /* * Now we know which physical port we are talking about we can * actually do our cable checking etc. Thankfully we don't need * to do the plumbing for other cases. */ switch (port_map[port]) { case PORT_PATA0: if (control & (1 << 5)) return 0; if (control & (1 << 3)) /* 40/80 pin primary */ ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; break; case PORT_PATA1: /* Bit 21 is set if the port is enabled */ if ((control5 & (1 << 21)) == 0) return 0; if (control5 & (1 << 19)) /* 40/80 pin secondary */ ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; break; case PORT_SATA: ap->cbl = ATA_CBL_SATA; break; } return ata_std_prereset(ap); } /** * jmicron_error_handler - Setup and error handler * @ap: Port to handle * * LOCKING: * None (inherited from caller). */ static void jmicron_error_handler(struct ata_port *ap) { return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /* No PIO or DMA methods needed for this device */ static struct scsi_host_template jmicron_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, /* Use standard CHS mapping rules */ .bios_param = ata_std_bios_param, }; static const struct ata_port_operations jmicron_ops = { .port_disable = ata_port_disable, /* Task file is PCI ATA format, use helpers */ .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 = jmicron_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, /* BMDMA handling is PCI ATA format, use helpers */ .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-related hooks */ .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, /* Generic PATA PCI ATA helpers */ .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; /** * jmicron_init_one - Register Jmicron ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in jmicron_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 jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) { static struct ata_port_info info = { .sht = &jmicron_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x3f, .port_ops = &jmicron_ops, }; struct ata_port_info *port_info[2] = { &info, &info }; u32 reg; if (id->driver_data != 368) { /* Put the controller into AHCI mode in case the AHCI driver has not yet been loaded. This can be done with either function present */ /* FIXME: We may want a way to override this in future */ pci_write_config_byte(pdev, 0x41, 0xa1); /* PATA controller is fn 1, AHCI is fn 0 */ if (PCI_FUNC(pdev->devfn) != 1) return -ENODEV; } if ( id->driver_data == 365 || id->driver_data == 366) { /* The 365/66 have two PATA channels, redirect the second */ pci_read_config_dword(pdev, 0x80, ®); reg |= (1 << 24); /* IDE1 to PATA IDE secondary */ pci_write_config_dword(pdev, 0x80, reg); } return ata_pci_init_one(pdev, port_info, 2); } static int jmicron_reinit_one(struct pci_dev *pdev) { u32 reg; switch(pdev->device) { case PCI_DEVICE_ID_JMICRON_JMB368: break; case PCI_DEVICE_ID_JMICRON_JMB365: case PCI_DEVICE_ID_JMICRON_JMB366: /* Restore mapping or disks swap and boy does it get ugly */ pci_read_config_dword(pdev, 0x80, ®); reg |= (1 << 24); /* IDE1 to PATA IDE secondary */ pci_write_config_dword(pdev, 0x80, reg); /* Fall through */ default: /* Make sure AHCI is turned back on */ pci_write_config_byte(pdev, 0x41, 0xa1); } return ata_pci_device_resume(pdev); } static const struct pci_device_id jmicron_pci_tbl[] = { { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361}, { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363}, { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365}, { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366}, { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368}, { } /* terminate list */ }; static struct pci_driver jmicron_pci_driver = { .name = DRV_NAME, .id_table = jmicron_pci_tbl, .probe = jmicron_init_one, .remove = ata_pci_remove_one, .suspend = ata_pci_device_suspend, .resume = jmicron_reinit_one, }; static int __init jmicron_init(void) { return pci_register_driver(&jmicron_pci_driver); } static void __exit jmicron_exit(void) { pci_unregister_driver(&jmicron_pci_driver); } module_init(jmicron_init); module_exit(jmicron_exit); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); MODULE_VERSION(DRV_VERSION);