--- /dev/null
+/*
+ * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
+ *
+ * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
+ * but this keeps the ISA-Bridge and slots alive.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "slc90e66"
+
+static DEFINE_SPINLOCK(slc90e66_lock);
+
+static void slc90e66_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ int is_slave = drive->dn & 1;
+ int master_port = hwif->channel ? 0x42 : 0x40;
+ int slave_port = 0x44;
+ unsigned long flags;
+ u16 master_data;
+ u8 slave_data;
+ int control = 0;
+ const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+ /* ISP RTC */
+ static const u8 timings[][2] = {
+ { 0, 0 },
+ { 0, 0 },
+ { 1, 0 },
+ { 2, 1 },
+ { 2, 3 }, };
+
+ spin_lock_irqsave(&slc90e66_lock, flags);
+ pci_read_config_word(dev, master_port, &master_data);
+
+ if (pio > 1)
+ control |= 1; /* Programmable timing on */
+ if (drive->media == ide_disk)
+ control |= 4; /* Prefetch, post write */
+ if (ide_pio_need_iordy(drive, pio))
+ control |= 2; /* IORDY */
+ if (is_slave) {
+ master_data |= 0x4000;
+ master_data &= ~0x0070;
+ if (pio > 1) {
+ /* Set PPE, IE and TIME */
+ master_data |= control << 4;
+ }
+ pci_read_config_byte(dev, slave_port, &slave_data);
+ slave_data &= hwif->channel ? 0x0f : 0xf0;
+ slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
+ (hwif->channel ? 4 : 0);
+ } else {
+ master_data &= ~0x3307;
+ if (pio > 1) {
+ /* enable PPE, IE and TIME */
+ master_data |= control;
+ }
+ master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
+ }
+ pci_write_config_word(dev, master_port, master_data);
+ if (is_slave)
+ pci_write_config_byte(dev, slave_port, slave_data);
+ spin_unlock_irqrestore(&slc90e66_lock, flags);
+}
+
+static void slc90e66_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ u8 maslave = hwif->channel ? 0x42 : 0x40;
+ int sitre = 0, a_speed = 7 << (drive->dn * 4);
+ int u_speed = 0, u_flag = 1 << drive->dn;
+ u16 reg4042, reg44, reg48, reg4a;
+ const u8 speed = drive->dma_mode;
+
+ pci_read_config_word(dev, maslave, ®4042);
+ sitre = (reg4042 & 0x4000) ? 1 : 0;
+ pci_read_config_word(dev, 0x44, ®44);
+ pci_read_config_word(dev, 0x48, ®48);
+ pci_read_config_word(dev, 0x4a, ®4a);
+
+ if (speed >= XFER_UDMA_0) {
+ u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
+
+ if (!(reg48 & u_flag))
+ pci_write_config_word(dev, 0x48, reg48|u_flag);
+ if ((reg4a & a_speed) != u_speed) {
+ pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+ pci_read_config_word(dev, 0x4a, ®4a);
+ pci_write_config_word(dev, 0x4a, reg4a|u_speed);
+ }
+ } else {
+ const u8 mwdma_to_pio[] = { 0, 3, 4 };
+
+ if (reg48 & u_flag)
+ pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
+ if (reg4a & a_speed)
+ pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+
+ if (speed >= XFER_MW_DMA_0)
+ drive->pio_mode =
+ mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
+ else
+ drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
+
+ slc90e66_set_pio_mode(hwif, drive);
+ }
+}
+
+static u8 slc90e66_cable_detect(ide_hwif_t *hwif)
+{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02;
+
+ pci_read_config_byte(dev, 0x47, ®47);
+
+ /* bit[0(1)]: 0:80, 1:40 */
+ return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static const struct ide_port_ops slc90e66_port_ops = {
+ .set_pio_mode = slc90e66_set_pio_mode,
+ .set_dma_mode = slc90e66_set_dma_mode,
+ .cable_detect = slc90e66_cable_detect,
+};
+
+static const struct ide_port_info slc90e66_chipset = {
+ .name = DRV_NAME,
+ .enablebits = { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} },
+ .port_ops = &slc90e66_port_ops,
+ .pio_mask = ATA_PIO4,
+ .swdma_mask = ATA_SWDMA2_ONLY,
+ .mwdma_mask = ATA_MWDMA12_ONLY,
+ .udma_mask = ATA_UDMA4,
+};
+
+static int slc90e66_init_one(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ return ide_pci_init_one(dev, &slc90e66_chipset, NULL);
+}
+
+static const struct pci_device_id slc90e66_pci_tbl[] = {
+ { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
+
+static struct pci_driver slc90e66_pci_driver = {
+ .name = "SLC90e66_IDE",
+ .id_table = slc90e66_pci_tbl,
+ .probe = slc90e66_init_one,
+ .remove = ide_pci_remove,
+ .suspend = ide_pci_suspend,
+ .resume = ide_pci_resume,
+};
+
+static int __init slc90e66_ide_init(void)
+{
+ return ide_pci_register_driver(&slc90e66_pci_driver);
+}
+
+static void __exit slc90e66_ide_exit(void)
+{
+ pci_unregister_driver(&slc90e66_pci_driver);
+}
+
+module_init(slc90e66_ide_init);
+module_exit(slc90e66_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff