177 lines
4.5 KiB
C
Executable file
177 lines
4.5 KiB
C
Executable file
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/*
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* Copyright (C) 2006 Red Hat
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*
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* May be copied or modified under the terms of the GNU General Public License
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#define DRV_NAME "jmicron"
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typedef enum {
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PORT_PATA0 = 0,
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PORT_PATA1 = 1,
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PORT_SATA = 2,
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} port_type;
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/**
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* jmicron_cable_detect - cable detection
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* @hwif: IDE port
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*
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* Returns the cable type.
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*/
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static u8 jmicron_cable_detect(ide_hwif_t *hwif)
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{
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struct pci_dev *pdev = to_pci_dev(hwif->dev);
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u32 control;
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u32 control5;
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int port = hwif->channel;
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port_type port_map[2];
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pci_read_config_dword(pdev, 0x40, &control);
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/* There are two basic mappings. One has the two SATA ports merged
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as master/slave and the secondary as PATA, the other has only the
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SATA port mapped */
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if (control & (1 << 23)) {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_PATA0;
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} else {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_SATA;
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}
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/* The 365/366 may have this bit set to map the second PATA port
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as the internal primary channel */
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pci_read_config_dword(pdev, 0x80, &control5);
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if (control5 & (1<<24))
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port_map[0] = PORT_PATA1;
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/* The two ports may then be logically swapped by the firmware */
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if (control & (1 << 22))
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port = port ^ 1;
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/*
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* Now we know which physical port we are talking about we can
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* actually do our cable checking etc. Thankfully we don't need
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* to do the plumbing for other cases.
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*/
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switch (port_map[port]) {
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case PORT_PATA0:
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if (control & (1 << 3)) /* 40/80 pin primary */
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return ATA_CBL_PATA40;
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return ATA_CBL_PATA80;
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case PORT_PATA1:
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if (control5 & (1 << 19)) /* 40/80 pin secondary */
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return ATA_CBL_PATA40;
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return ATA_CBL_PATA80;
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case PORT_SATA:
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break;
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}
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/* Avoid bogus "control reaches end of non-void function" */
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return ATA_CBL_PATA80;
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}
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static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
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{
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}
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/**
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* jmicron_set_dma_mode - set host controller for DMA mode
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* @hwif: port
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* @drive: drive
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*
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* As the JMicron snoops for timings we don't need to do anything here.
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*/
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static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
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{
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}
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static const struct ide_port_ops jmicron_port_ops = {
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.set_pio_mode = jmicron_set_pio_mode,
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.set_dma_mode = jmicron_set_dma_mode,
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.cable_detect = jmicron_cable_detect,
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};
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static const struct ide_port_info jmicron_chipset = {
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.name = DRV_NAME,
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.enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
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.port_ops = &jmicron_port_ops,
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.pio_mask = ATA_PIO5,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA6,
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};
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/**
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* jmicron_init_one - pci layer discovery entry
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* @dev: PCI device
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* @id: ident table entry
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*
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* Called by the PCI code when it finds a Jmicron controller.
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* We then use the IDE PCI generic helper to do most of the work.
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*/
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static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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return ide_pci_init_one(dev, &jmicron_chipset, NULL);
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}
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/* All JMB PATA controllers have and will continue to have the same
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* interface. Matching vendor and device class is enough for all
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* current and future controllers if the controller is programmed
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* properly.
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*
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* If libata is configured, jmicron PCI quirk programs the controller
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* into the correct mode. If libata isn't configured, match known
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* device IDs too to maintain backward compatibility.
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*/
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static struct pci_device_id jmicron_pci_tbl[] = {
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#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
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#endif
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{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
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PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
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static struct pci_driver jmicron_pci_driver = {
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.name = "JMicron IDE",
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.id_table = jmicron_pci_tbl,
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.probe = jmicron_init_one,
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.remove = ide_pci_remove,
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.suspend = ide_pci_suspend,
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.resume = ide_pci_resume,
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};
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static int __init jmicron_ide_init(void)
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{
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return ide_pci_register_driver(&jmicron_pci_driver);
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}
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static void __exit jmicron_ide_exit(void)
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{
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pci_unregister_driver(&jmicron_pci_driver);
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}
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module_init(jmicron_ide_init);
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module_exit(jmicron_ide_exit);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
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MODULE_LICENSE("GPL");
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