kernel-ark/drivers/ide/pci/jmicron.c
Tejun Heo ebbc203136 jmicron: make ide jmicron driver play nice with libata ones
When libata is configured, the device is configured such that SATA and
PATA ports live in separate functions with different programming
interfaces.  pata_jmicron and ide jmicron drivers can drive only the
PATA part.

This patch makes jmicron match PCI class code such that it doesn't
attach itself to the SATA part preventing the proper ahci driver from
attaching.

This change is suggested by Bartlomiej.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: justin@jmicron.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-03-17 21:57:25 +01:00

289 lines
6.9 KiB
C

/*
* 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;
/**
* jmicron_ratemask - Compute available modes
* @drive: IDE drive
*
* Compute the available speeds for the devices on the interface. This
* is all modes to ATA133 clipped by drive cable setup.
*/
static u8 jmicron_ratemask(ide_drive_t *drive)
{
u8 mode = 4;
if (!eighty_ninty_three(drive))
mode = min(mode, (u8)1);
return mode;
}
/**
* ata66_jmicron - Cable check
* @hwif: IDE port
*
* Return 1 if the cable is 80pin
*/
static int __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 0;
return 1;
case PORT_PATA1:
if (control5 & (1 << 19)) /* 40/80 pin secondary */
return 0;
return 1;
case PORT_SATA:
break;
}
return 1; /* Avoid bogus "control reaches end of non-void function" */
}
static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)
{
return;
}
/**
* config_jmicron_chipset_for_pio - set drive timings
* @drive: drive to tune
* @speed we want
*
*/
static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)
{
u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
if (set_speed)
(void) ide_config_drive_speed(drive, speed);
}
/**
* jmicron_tune_chipset - set controller timings
* @drive: Drive to set up
* @xferspeed: speed we want to achieve
*
* As the JMicron snoops for timings all we actually need to do is
* make sure we don't set an invalid mode. We do need to honour
* the cable detect here.
*/
static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
{
u8 speed = ide_rate_filter(jmicron_ratemask(drive), xferspeed);
return ide_config_drive_speed(drive, speed);
}
/**
* config_chipset_for_dma - configure for DMA
* @drive: drive to configure
*
* As the JMicron snoops for timings all we actually need to do is
* make sure we don't set an invalid mode.
*/
static int config_chipset_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, jmicron_ratemask(drive));
if (!speed)
return 0;
jmicron_tune_chipset(drive, speed);
return ide_dma_enable(drive);
}
/**
* 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_use_dma(drive) && config_chipset_for_dma(drive))
return 0;
config_jmicron_chipset_for_pio(drive, 1);
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->udma_four))
hwif->udma_four = ata66_jmicron(hwif);
hwif->autodma = 1;
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
return;
fallback:
hwif->autodma = 0;
return;
}
#define DECLARE_JMB_DEV(name_str) \
{ \
.name = name_str, \
.init_hwif = init_hwif_jmicron, \
.channels = 2, \
.autodma = AUTODMA, \
.bootable = ON_BOARD, \
.enablebits = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \
}
static ide_pci_device_t jmicron_chipsets[] __devinitdata = {
/* 0 */ DECLARE_JMB_DEV("JMB361"),
/* 1 */ DECLARE_JMB_DEV("JMB363"),
/* 2 */ DECLARE_JMB_DEV("JMB365"),
/* 3 */ DECLARE_JMB_DEV("JMB366"),
/* 4 */ DECLARE_JMB_DEV("JMB368"),
};
/**
* 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_chipsets[id->driver_data]);
return 0;
}
/* If libata is configured, jmicron PCI quirk will configure it such
* that the SATA ports are in AHCI function while the PATA ports are
* in a separate IDE function. In such cases, match device class and
* attach only to IDE. If libata isn't configured, keep the old
* behavior for backward compatibility.
*/
#if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
#define JMB_CLASS PCI_CLASS_STORAGE_IDE << 8
#define JMB_CLASS_MASK 0xffff00
#else
#define JMB_CLASS 0
#define JMB_CLASS_MASK 0
#endif
static struct pci_device_id jmicron_pci_tbl[] = {
{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361,
PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 0},
{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363,
PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 1},
{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365,
PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 2},
{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366,
PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 3},
{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368,
PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 4},
{ 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");