Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 176 insertions, 0 deletions

diff --git a/drivers/ide/jmicron.c b/drivers/ide/jmicron.c
new file mode 100644
index 000000000..ae6480dcb
--- /dev/null
+++ b/drivers/ide/jmicron.c
@@ -0,0 +1,176 @@
+
+/*
+ * Copyright (C) 2006		Red Hat
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "jmicron"
+
+typedef enum {
+	PORT_PATA0 = 0,
+	PORT_PATA1 = 1,
+	PORT_SATA = 2,
+} port_type;
+
+/**
+ *	jmicron_cable_detect	-	cable detection
+ *	@hwif: IDE port
+ *
+ *	Returns the cable type.
+ */
+
+static u8 jmicron_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+	u32 control;
+	u32 control5;
+
+	int port = hwif->channel;
+	port_type port_map[2];
+
+	pci_read_config_dword(pdev, 0x40, &control);
+
+	/* There are two basic mappings. One has the two SATA ports merged
+	   as master/slave and the secondary as PATA, the other has only the
+	   SATA port mapped */
+	if (control & (1 << 23)) {
+		port_map[0] = PORT_SATA;
+		port_map[1] = PORT_PATA0;
+	} else {
+		port_map[0] = PORT_SATA;
+		port_map[1] = PORT_SATA;
+	}
+
+	/* The 365/366 may have this bit set to map the second PATA port
+	   as the internal primary channel */
+	pci_read_config_dword(pdev, 0x80, &control5);
+	if (control5 & (1<<24))
+		port_map[0] = PORT_PATA1;
+
+	/* The two ports may then be logically swapped by the firmware */
+	if (control & (1 << 22))
+		port = port ^ 1;
+
+	/*
+	 *	Now we know which physical port we are talking about we can
+	 *	actually do our cable checking etc. Thankfully we don't need
+	 *	to do the plumbing for other cases.
+	 */
+	switch (port_map[port]) {
+	case PORT_PATA0:
+		if (control & (1 << 3))	/* 40/80 pin primary */
+			return ATA_CBL_PATA40;
+		return ATA_CBL_PATA80;
+	case PORT_PATA1:
+		if (control5 & (1 << 19))	/* 40/80 pin secondary */
+			return ATA_CBL_PATA40;
+		return ATA_CBL_PATA80;
+	case PORT_SATA:
+		break;
+	}
+	/* Avoid bogus "control reaches end of non-void function" */
+	return ATA_CBL_PATA80;
+}
+
+static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+}
+
+/**
+ *	jmicron_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	As the JMicron snoops for timings we don't need to do anything here.
+ */
+
+static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+}
+
+static const struct ide_port_ops jmicron_port_ops = {
+	.set_pio_mode		= jmicron_set_pio_mode,
+	.set_dma_mode		= jmicron_set_dma_mode,
+	.cable_detect		= jmicron_cable_detect,
+};
+
+static const struct ide_port_info jmicron_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
+	.port_ops	= &jmicron_port_ops,
+	.pio_mask	= ATA_PIO5,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA6,
+};
+
+/**
+ *	jmicron_init_one	-	pci layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds a Jmicron controller.
+ *	We then use the IDE PCI generic helper to do most of the work.
+ */
+
+static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &jmicron_chipset, NULL);
+}
+
+/* All JMB PATA controllers have and will continue to have the same
+ * interface.  Matching vendor and device class is enough for all
+ * current and future controllers if the controller is programmed
+ * properly.
+ *
+ * If libata is configured, jmicron PCI quirk programs the controller
+ * into the correct mode.  If libata isn't configured, match known
+ * device IDs too to maintain backward compatibility.
+ */
+static struct pci_device_id jmicron_pci_tbl[] = {
+#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
+#endif
+	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
+
+static struct pci_driver jmicron_pci_driver = {
+	.name		= "JMicron IDE",
+	.id_table	= jmicron_pci_tbl,
+	.probe		= jmicron_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init jmicron_ide_init(void)
+{
+	return ide_pci_register_driver(&jmicron_pci_driver);
+}
+
+static void __exit jmicron_ide_exit(void)
+{
+	pci_unregister_driver(&jmicron_pci_driver);
+}
+
+module_init(jmicron_ide_init);
+module_exit(jmicron_ide_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
+MODULE_LICENSE("GPL");