Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 181 insertions, 0 deletions

diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c
new file mode 100644
index 000000000..8af92bbb3
--- /dev/null
+++ b/drivers/ide/slc90e66.c
@@ -0,0 +1,181 @@
+/*
+ *  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, &reg4042);
+	sitre = (reg4042 & 0x4000) ? 1 : 0;
+	pci_read_config_word(dev, 0x44, &reg44);
+	pci_read_config_word(dev, 0x48, &reg48);
+	pci_read_config_word(dev, 0x4a, &reg4a);
+
+	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, &reg4a);
+			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, &reg47);
+
+	/* 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");