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-rw-r--r--drivers/ide/Kconfig7
-rw-r--r--drivers/ide/Makefile1
-rw-r--r--drivers/ide/it8172.c166
-rw-r--r--include/linux/pci_ids.h1
4 files changed, 175 insertions, 0 deletions
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 4ee85fcf9aaf..3f9503867e6b 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -511,6 +511,13 @@ config BLK_DEV_PIIX
This allows the kernel to change PIO, DMA and UDMA speeds and to
configure the chip to optimum performance.
+config BLK_DEV_IT8172
+ tristate "IT8172 IDE support"
+ select BLK_DEV_IDEDMA_PCI
+ help
+ This driver adds support for the IDE controller on the
+ IT8172 System Controller.
+
config BLK_DEV_IT8213
tristate "IT8213 IDE support"
select BLK_DEV_IDEDMA_PCI
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index 410728992e6a..c2b9c93f0095 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_BLK_DEV_SC1200) += sc1200.o
obj-$(CONFIG_BLK_DEV_CY82C693) += cy82c693.o
obj-$(CONFIG_BLK_DEV_DELKIN) += delkin_cb.o
obj-$(CONFIG_BLK_DEV_HPT366) += hpt366.o
+obj-$(CONFIG_BLK_DEV_IT8172) += it8172.o
obj-$(CONFIG_BLK_DEV_IT8213) += it8213.o
obj-$(CONFIG_BLK_DEV_IT821X) += it821x.o
obj-$(CONFIG_BLK_DEV_JMICRON) += jmicron.o
diff --git a/drivers/ide/it8172.c b/drivers/ide/it8172.c
new file mode 100644
index 000000000000..e021078cd06b
--- /dev/null
+++ b/drivers/ide/it8172.c
@@ -0,0 +1,166 @@
+/*
+ *
+ * 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 (ata_id_has_iordy(drive->id))
+ /* 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, &reg48);
+ pci_read_config_byte(dev, 0x4a, &reg4a);
+
+ 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");
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 218c73b1e6d4..d543365518ab 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1658,6 +1658,7 @@
#define PCI_VENDOR_ID_ROCKWELL 0x127A
#define PCI_VENDOR_ID_ITE 0x1283
+#define PCI_DEVICE_ID_ITE_8172 0x8172
#define PCI_DEVICE_ID_ITE_8211 0x8211
#define PCI_DEVICE_ID_ITE_8212 0x8212
#define PCI_DEVICE_ID_ITE_8213 0x8213
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