[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>

3 files changed, 276 insertions, 0 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 69d627bd537a..0524f17175fd 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -594,6 +594,12 @@ config BLK_DEV_HPT366
           ide-probe at boot. It is reported to support DVD II drives, by the
           manufacturer.
 
+config BLK_DEV_JMICRON
+        tristate "JMicron JMB36x support"
+        help
+          Basic support for the JMicron ATA controllers. For full support
+          use the libata drivers.
+
 config BLK_DEV_SC1200
         tristate "National SCx200 chipset support"
         help
diff --git a/drivers/ide/pci/Makefile b/drivers/ide/pci/Makefile
index f35d684edc25..640a54b09b5a 100644
--- a/drivers/ide/pci/Makefile
+++ b/drivers/ide/pci/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_BLK_DEV_HPT366)		+= hpt366.o
 #obj-$(CONFIG_BLK_DEV_HPT37X)           += hpt37x.o
 obj-$(CONFIG_BLK_DEV_IT8172)            += it8172.o
 obj-$(CONFIG_BLK_DEV_IT821X)            += it821x.o
+obj-$(CONFIG_BLK_DEV_JMICRON)           += jmicron.o
 obj-$(CONFIG_BLK_DEV_NS87415)           += ns87415.o
 obj-$(CONFIG_BLK_DEV_OPTI621)           += opti621.o
 obj-$(CONFIG_BLK_DEV_PDC202XX_OLD)      += pdc202xx_old.o
diff --git a/drivers/ide/pci/jmicron.c b/drivers/ide/pci/jmicron.c
new file mode 100644
index 000000000000..68c74bbf8b06
--- /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");