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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/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
typedef enum {
PORT_PATA0 = 0,
PORT_PATA1 = 1,
PORT_SATA = 2,
} port_type;
/**
* ata66_jmicron - Cable check
* @hwif: IDE port
*
* Returns the cable type.
*/
static u8 __devinit ata66_jmicron(ide_hwif_t *hwif)
{
struct pci_dev *pdev = hwif->pci_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_tuneproc(ide_drive_t *drive, u8 pio)
{
pio = ide_get_best_pio_mode(drive, pio, 5);
ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
/**
* jmicron_tune_chipset - set controller timings
* @drive: Drive to set up
* @speed: speed we want to achieve
*
* As the JMicron snoops for timings all we actually need to do is
* set the transfer mode on the device.
*/
static int jmicron_tune_chipset(ide_drive_t *drive, const u8 speed)
{
return ide_config_drive_speed(drive, speed);
}
/**
* jmicron_configure_drive_for_dma - set up for DMA transfers
* @drive: drive we are going to set up
*
* As the JMicron snoops for timings all we actually need to do is
* make sure we don't set an invalid mode.
*/
static int jmicron_config_drive_for_dma (ide_drive_t *drive)
{
if (ide_tune_dma(drive))
return 0;
jmicron_tuneproc(drive, 255);
return -1;
}
/**
* init_hwif_jmicron - set up hwif structs
* @hwif: interface to set up
*
* Minimal set up is required for the Jmicron hardware.
*/
static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
{
hwif->speedproc = &jmicron_tune_chipset;
hwif->tuneproc = &jmicron_tuneproc;
hwif->drives[0].autotune = 1;
hwif->drives[1].autotune = 1;
if (!hwif->dma_base)
goto fallback;
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x7f;
hwif->mwdma_mask = 0x07;
hwif->ide_dma_check = &jmicron_config_drive_for_dma;
if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = ata66_jmicron(hwif);
hwif->autodma = 1;
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
return;
fallback:
hwif->autodma = 0;
return;
}
static ide_pci_device_t jmicron_chipset __devinitdata = {
.name = "JMB",
.init_hwif = init_hwif_jmicron,
.autodma = AUTODMA,
.bootable = ON_BOARD,
.enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
.pio_mask = ATA_PIO5,
};
/**
* 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)
{
ide_setup_pci_device(dev, &jmicron_chipset);
return 0;
}
/* 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,
};
static int __init jmicron_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(jmicron_ide_init);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
MODULE_LICENSE("GPL");
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