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drivers/ata/pata_jmicron.c
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/* * 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. * |
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* (c) 2006 Red Hat |
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*/ #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" |
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#define DRV_VERSION "0.1.5" |
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typedef enum { PORT_PATA0 = 0, PORT_PATA1 = 1, PORT_SATA = 2, } port_type; /** * jmicron_pre_reset - check for 40/80 pin |
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* @link: ATA link |
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* @deadline: deadline jiffies for the operation |
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* * Perform the PATA port setup we need. |
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* |
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* 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. */ |
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static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) |
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{ |
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struct ata_port *ap = link->ap; |
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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) |
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return -ENOENT; |
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/* 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. */ |
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switch (port_map[port]) { |
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case PORT_PATA0: |
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if ((control & (1 << 5)) == 0) return -ENOENT; |
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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) |
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return -ENOENT; |
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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; } |
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return ata_sff_prereset(link, deadline); |
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} |
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/* No PIO or DMA methods needed for this device */ static struct scsi_host_template jmicron_sht = { |
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ATA_BMDMA_SHT(DRV_NAME), |
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}; |
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static struct ata_port_operations jmicron_ops = { .inherits = &ata_bmdma_port_ops, |
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.prereset = jmicron_pre_reset, |
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}; /** * 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) { |
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static const struct ata_port_info info = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA5, |
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.port_ops = &jmicron_ops, }; |
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const struct ata_port_info *ppi[] = { &info, NULL }; |
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return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0); |
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} static const struct pci_device_id jmicron_pci_tbl[] = { |
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{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, |
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{ } /* 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, |
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#ifdef CONFIG_PM |
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.suspend = ata_pci_device_suspend, |
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.resume = ata_pci_device_resume, |
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#endif |
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}; 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); |