+++ /dev/null
-/*
- *
- * 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_hwif_t *hwif, ide_drive_t *drive)
-{
- struct pci_dev *dev = to_pci_dev(hwif->dev);
- u16 drive_enables;
- u32 drive_timing;
- const u8 pio = drive->pio_mode - XFER_PIO_0;
-
- /*
- * 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_hwif_t *hwif, ide_drive_t *drive)
-{
- 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;
- const u8 speed = drive->dma_mode;
-
- 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 };
-
- pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
- pci_write_config_byte(dev, 0x4a, reg4a & ~a_speed);
-
- drive->pio_mode =
- mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
-
- it8172_set_pio_mode(hwif, drive);
- }
-}
-
-
-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 = {
- .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 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");
git.samba.org / sfrench / cifs-2.6.git / blobdiff