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path: root/drivers/ide/jmicron.c
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-rw-r--r--drivers/ide/jmicron.c176
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");