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/*
* Copyright (C) 2006 Red Hat <alan@redhat.com>
*
* May be copied or modified under the terms of the GNU General Public License
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
typedef enum {
PORT_PATA0 = 0,
PORT_PATA1 = 1,
PORT_SATA = 2,
} port_type;
/**
* jmicron_cable_detect - cable detection
* @hwif: IDE port
*
* Returns the cable type.
*/
static u8 __devinit jmicron_cable_detect(ide_hwif_t *hwif)
{
struct pci_dev *pdev = to_pci_dev(hwif->dev);
u32 control;
u32 control5;
int port = hwif->channel;
port_type port_map[2];
pci_read_config_dword(pdev, 0x40, &control);
/* 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 << 3)) /* 40/80 pin primary */
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
case PORT_PATA1:
if (control5 & (1 << 19)) /* 40/80 pin secondary */
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
case PORT_SATA:
break;
}
/* Avoid bogus "control reaches end of non-void function" */
return ATA_CBL_PATA80;
}
static void jmicron_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
}
/**
* jmicron_set_dma_mode - set host controller for DMA mode
* @drive: drive
* @mode: DMA mode
*
* As the JMicron snoops for timings we don't need to do anything here.
*/
static void jmicron_set_dma_mode(ide_drive_t *drive, const u8 mode)
{
}
static const struct ide_port_ops jmicron_port_ops = {
.set_pio_mode = jmicron_set_pio_mode,
.set_dma_mode = jmicron_set_dma_mode,
.cable_detect = jmicron_cable_detect,
};
static const struct ide_port_info jmicron_chipset __devinitdata = {
.name = "JMB",
.enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
.port_ops = &jmicron_port_ops,
.pio_mask = ATA_PIO5,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
};
/**
* jmicron_init_one - pci layer discovery entry
* @dev: PCI device
* @id: ident table entry
*
* Called by the PCI code when it finds a Jmicron controller.
* We then use the IDE PCI generic helper to do most of the work.
*/
static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_pci_init_one(dev, &jmicron_chipset, NULL);
}
/* All JMB PATA controllers have and will continue to have the same
* interface. Matching vendor and device class is enough for all
* current and future controllers if the controller is programmed
* properly.
*
* If libata is configured, jmicron PCI quirk programs the controller
* into the correct mode. If libata isn't configured, match known
* device IDs too to maintain backward compatibility.
*/
static struct pci_device_id jmicron_pci_tbl[] = {
#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
#endif
{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
static struct pci_driver driver = {
.name = "JMicron IDE",
.id_table = jmicron_pci_tbl,
.probe = jmicron_init_one,
.remove = ide_pci_remove,
};
static int __init jmicron_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
static void __exit jmicron_ide_exit(void)
{
pci_unregister_driver(&driver);
}
module_init(jmicron_ide_init);
module_exit(jmicron_ide_exit);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
MODULE_LICENSE("GPL");
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