[PATCH] non-libata driver for Jmicron devices
Less functional than libata this just uses the merged interface provided for
dumb legacy OS's. This is basically a bridge for people not yet ready to use
libata for some reason or another.
Port visibility is entirely dependant on the BIOS setup.
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/ide/pci/jmicron.c b/drivers/ide/pci/jmicron.c
new file mode 100644
index 0000000..68c74bb
--- /dev/null
+++ b/drivers/ide/pci/jmicron.c
@@ -0,0 +1,269 @@
+
+/*
+ * Copyright (C) 2006 Red Hat <alan@redhat.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+typedef enum {
+ PORT_PATA0 = 0,
+ PORT_PATA1 = 1,
+ PORT_SATA = 2,
+} port_type;
+
+/**
+ * jmicron_ratemask - Compute available modes
+ * @drive: IDE drive
+ *
+ * Compute the available speeds for the devices on the interface. This
+ * is all modes to ATA133 clipped by drive cable setup.
+ */
+
+static u8 jmicron_ratemask(ide_drive_t *drive)
+{
+ u8 mode = 4;
+ if (!eighty_ninty_three(drive))
+ mode = min(mode, (u8)1);
+ return mode;
+}
+
+/**
+ * ata66_jmicron - Cable check
+ * @hwif: IDE port
+ *
+ * Return 1 if the cable is 80pin
+ */
+
+static int __devinit ata66_jmicron(ide_hwif_t *hwif)
+{
+ struct pci_dev *pdev = hwif->pci_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 1;
+ return 0;
+ case PORT_PATA1:
+ if (control5 & (1 << 19)) /* 40/80 pin secondary */
+ return 0;
+ return 1;
+ case PORT_SATA:
+ return 1;
+ }
+}
+
+static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)
+{
+ return;
+}
+
+/**
+ * config_jmicron_chipset_for_pio - set drive timings
+ * @drive: drive to tune
+ * @speed we want
+ *
+ */
+
+static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)
+{
+ u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
+ if (set_speed)
+ (void) ide_config_drive_speed(drive, speed);
+}
+
+/**
+ * jmicron_tune_chipset - set controller timings
+ * @drive: Drive to set up
+ * @xferspeed: speed we want to achieve
+ *
+ * As the JMicron snoops for timings all we actually need to do is
+ * make sure we don't set an invalid mode. We do need to honour
+ * the cable detect here.
+ */
+
+static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
+{
+
+ u8 speed = ide_rate_filter(jmicron_ratemask(drive), xferspeed);
+
+ return ide_config_drive_speed(drive, speed);
+}
+
+/**
+ * config_chipset_for_dma - configure for DMA
+ * @drive: drive to configure
+ *
+ * As the JMicron snoops for timings all we actually need to do is
+ * make sure we don't set an invalid mode.
+ */
+
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+ u8 speed = ide_dma_speed(drive, jmicron_ratemask(drive));
+
+ config_jmicron_chipset_for_pio(drive, !speed);
+ jmicron_tune_chipset(drive, speed);
+ return ide_dma_enable(drive);
+}
+
+/**
+ * jmicron_configure_drive_for_dma - set up for DMA transfers
+ * @drive: drive we are going to set up
+ *
+ * As the JMicron snoops for timings all we actually need to do is
+ * make sure we don't set an invalid mode.
+ */
+
+static int jmicron_config_drive_for_dma (ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ if (ide_use_dma(drive)) {
+ if (config_chipset_for_dma(drive))
+ return hwif->ide_dma_on(drive);
+ }
+ config_jmicron_chipset_for_pio(drive, 1);
+ return hwif->ide_dma_off_quietly(drive);
+}
+
+/**
+ * init_hwif_jmicron - set up hwif structs
+ * @hwif: interface to set up
+ *
+ * Minimal set up is required for the Jmicron hardware.
+ */
+
+static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
+{
+ hwif->speedproc = &jmicron_tune_chipset;
+ hwif->tuneproc = &jmicron_tuneproc;
+
+ hwif->drives[0].autotune = 1;
+ hwif->drives[1].autotune = 1;
+
+ if (!hwif->dma_base)
+ goto fallback;
+
+ hwif->atapi_dma = 1;
+ hwif->ultra_mask = 0x7f;
+ hwif->mwdma_mask = 0x07;
+
+ hwif->ide_dma_check = &jmicron_config_drive_for_dma;
+ if (!(hwif->udma_four))
+ hwif->udma_four = ata66_jmicron(hwif);
+
+ hwif->autodma = 1;
+ hwif->drives[0].autodma = hwif->autodma;
+ hwif->drives[1].autodma = hwif->autodma;
+ return;
+fallback:
+ hwif->autodma = 0;
+ return;
+}
+
+#define DECLARE_JMB_DEV(name_str) \
+ { \
+ .name = name_str, \
+ .init_hwif = init_hwif_jmicron, \
+ .channels = 2, \
+ .autodma = AUTODMA, \
+ .bootable = ON_BOARD, \
+ .enablebits = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \
+ }
+
+static ide_pci_device_t jmicron_chipsets[] __devinitdata = {
+ /* 0 */ DECLARE_JMB_DEV("JMB361"),
+ /* 1 */ DECLARE_JMB_DEV("JMB363"),
+ /* 2 */ DECLARE_JMB_DEV("JMB365"),
+ /* 3 */ DECLARE_JMB_DEV("JMB366"),
+ /* 4 */ DECLARE_JMB_DEV("JMB368"),
+};
+
+/**
+ * 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 __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]);
+ return 0;
+}
+
+static struct pci_device_id jmicron_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 0},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 1},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 2},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 3},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 4},
+ { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
+
+static struct pci_driver driver = {
+ .name = "JMicron IDE",
+ .id_table = jmicron_pci_tbl,
+ .probe = jmicron_init_one,
+};
+
+static int __init jmicron_ide_init(void)
+{
+ return ide_pci_register_driver(&driver);
+}
+
+module_init(jmicron_ide_init);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
+MODULE_LICENSE("GPL");