167 lines
5.1 KiB
C
167 lines
5.1 KiB
C
/*
|
|
*
|
|
* BRIEF MODULE DESCRIPTION
|
|
* IT8172 IDE controller support
|
|
*
|
|
* Copyright (C) 2000 MontaVista Software Inc.
|
|
* Copyright (C) 2008 Shane McDonald
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#define DRV_NAME "IT8172"
|
|
|
|
static void it8172_set_pio_mode(ide_drive_t *drive, const u8 pio)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct pci_dev *dev = to_pci_dev(hwif->dev);
|
|
u16 drive_enables;
|
|
u32 drive_timing;
|
|
|
|
/*
|
|
* The highest value of DIOR/DIOW pulse width and recovery time
|
|
* that can be set in the IT8172 is 8 PCI clock cycles. As a result,
|
|
* it cannot be configured for PIO mode 0. This table sets these
|
|
* parameters to the maximum supported by the IT8172.
|
|
*/
|
|
static const u8 timings[] = { 0x3f, 0x3c, 0x1b, 0x12, 0x0a };
|
|
|
|
pci_read_config_word(dev, 0x40, &drive_enables);
|
|
pci_read_config_dword(dev, 0x44, &drive_timing);
|
|
|
|
/*
|
|
* Enable port 0x44. The IT8172 spec is confused; it calls
|
|
* this register the "Slave IDE Timing Register", but in fact,
|
|
* it controls timing for both master and slave drives.
|
|
*/
|
|
drive_enables |= 0x4000;
|
|
|
|
drive_enables &= drive->dn ? 0xc006 : 0xc060;
|
|
if (drive->media == ide_disk)
|
|
/* enable prefetch */
|
|
drive_enables |= 0x0004 << (drive->dn * 4);
|
|
if (ide_pio_need_iordy(drive, pio))
|
|
/* enable IORDY sample-point */
|
|
drive_enables |= 0x0002 << (drive->dn * 4);
|
|
|
|
drive_timing &= drive->dn ? 0x00003f00 : 0x000fc000;
|
|
drive_timing |= timings[pio] << (drive->dn * 6 + 8);
|
|
|
|
pci_write_config_word(dev, 0x40, drive_enables);
|
|
pci_write_config_dword(dev, 0x44, drive_timing);
|
|
}
|
|
|
|
static void it8172_set_dma_mode(ide_drive_t *drive, const u8 speed)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct pci_dev *dev = to_pci_dev(hwif->dev);
|
|
int a_speed = 3 << (drive->dn * 4);
|
|
int u_flag = 1 << drive->dn;
|
|
int u_speed = 0;
|
|
u8 reg48, reg4a;
|
|
|
|
pci_read_config_byte(dev, 0x48, ®48);
|
|
pci_read_config_byte(dev, 0x4a, ®4a);
|
|
|
|
if (speed >= XFER_UDMA_0) {
|
|
u8 udma = speed - XFER_UDMA_0;
|
|
u_speed = udma << (drive->dn * 4);
|
|
|
|
pci_write_config_byte(dev, 0x48, reg48 | u_flag);
|
|
reg4a &= ~a_speed;
|
|
pci_write_config_byte(dev, 0x4a, reg4a | u_speed);
|
|
} else {
|
|
const u8 mwdma_to_pio[] = { 0, 3, 4 };
|
|
u8 pio;
|
|
|
|
pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
|
|
pci_write_config_byte(dev, 0x4a, reg4a & ~a_speed);
|
|
|
|
pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
|
|
|
|
it8172_set_pio_mode(drive, pio);
|
|
}
|
|
}
|
|
|
|
|
|
static const struct ide_port_ops it8172_port_ops = {
|
|
.set_pio_mode = it8172_set_pio_mode,
|
|
.set_dma_mode = it8172_set_dma_mode,
|
|
};
|
|
|
|
static const struct ide_port_info it8172_port_info __devinitdata = {
|
|
.name = DRV_NAME,
|
|
.port_ops = &it8172_port_ops,
|
|
.enablebits = { {0x41, 0x80, 0x80}, {0x00, 0x00, 0x00} },
|
|
.host_flags = IDE_HFLAG_SINGLE,
|
|
.pio_mask = ATA_PIO4 & ~ATA_PIO0,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA2,
|
|
};
|
|
|
|
static int __devinit it8172_init_one(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
|
|
return -ENODEV; /* IT8172 is more than an IDE controller */
|
|
return ide_pci_init_one(dev, &it8172_port_info, NULL);
|
|
}
|
|
|
|
static struct pci_device_id it8172_pci_tbl[] = {
|
|
{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8172), 0 },
|
|
{ 0, },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, it8172_pci_tbl);
|
|
|
|
static struct pci_driver it8172_pci_driver = {
|
|
.name = "IT8172_IDE",
|
|
.id_table = it8172_pci_tbl,
|
|
.probe = it8172_init_one,
|
|
.remove = ide_pci_remove,
|
|
.suspend = ide_pci_suspend,
|
|
.resume = ide_pci_resume,
|
|
};
|
|
|
|
static int __init it8172_ide_init(void)
|
|
{
|
|
return ide_pci_register_driver(&it8172_pci_driver);
|
|
}
|
|
|
|
static void __exit it8172_ide_exit(void)
|
|
{
|
|
pci_unregister_driver(&it8172_pci_driver);
|
|
}
|
|
|
|
module_init(it8172_ide_init);
|
|
module_exit(it8172_ide_exit);
|
|
|
|
MODULE_AUTHOR("Steve Longerbeam");
|
|
MODULE_DESCRIPTION("PCI driver module for ITE 8172 IDE");
|
|
MODULE_LICENSE("GPL");
|