1 files changed, 470 insertions, 0 deletions

diff --git a/drivers/ide/serverworks.c b/drivers/ide/serverworks.c
new file mode 100644
index 000000000000..437bc919dafd
--- /dev/null
+++ b/drivers/ide/serverworks.c
@@ -0,0 +1,470 @@
+/*
+ * Copyright (C) 1998-2000 Michel Aubry
+ * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
+ * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
+ * Portions copyright (c) 2001 Sun Microsystems
+ *
+ *
+ * RCC/ServerWorks IDE driver for Linux
+ *
+ *   OSB4: `Open South Bridge' IDE Interface (fn 1)
+ *         supports UDMA mode 2 (33 MB/s)
+ *
+ *   CSB5: `Champion South Bridge' IDE Interface (fn 1)
+ *         all revisions support UDMA mode 4 (66 MB/s)
+ *         revision A2.0 and up support UDMA mode 5 (100 MB/s)
+ *
+ *         *** The CSB5 does not provide ANY register ***
+ *         *** to detect 80-conductor cable presence. ***
+ *
+ *   CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
+ *
+ *   HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
+ *   controller same as the CSB6. Single channel ATA100 only.
+ *
+ * Documentation:
+ *      Available under NDA only. Errata info very hard to get.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "serverworks"
+
+#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
+#define SVWKS_CSB6_REVISION     0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
+
+/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
+ * can overrun their FIFOs when used with the CSB5 */
+static const char *svwks_bad_ata100[] = {
+        "ST320011A",
+        "ST340016A",
+        "ST360021A",
+        "ST380021A",
+        NULL
+};
+
+static struct pci_dev *isa_dev;
+
+static int check_in_drive_lists (ide_drive_t *drive, const char **list)
+{
+        char *m = (char *)&drive->id[ATA_ID_PROD];
+
+        while (*list)
+                if (!strcmp(*list++, m))
+                        return 1;
+        return 0;
+}
+
+static u8 svwks_udma_filter(ide_drive_t *drive)
+{
+        struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+        u8 mask = 0;
+
+        if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
+                return 0x1f;
+        if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
+                u32 reg = 0;
+                if (isa_dev)
+                        pci_read_config_dword(isa_dev, 0x64, &reg);
+                        
+                /*
+                 *      Don't enable UDMA on disk devices for the moment
+                 */
+                if(drive->media == ide_disk)
+                        return 0;
+                /* Check the OSB4 DMA33 enable bit */
+                return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
+        } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
+                return 0x07;
+        } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
+                u8 btr = 0, mode;
+                pci_read_config_byte(dev, 0x5A, &btr);
+                mode = btr & 0x3;
+
+                /* If someone decides to do UDMA133 on CSB5 the same
+                   issue will bite so be inclusive */
+                if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
+                        mode = 2;
+
+                switch(mode) {
+                case 3:  mask = 0x3f; break;
+                case 2:  mask = 0x1f; break;
+                case 1:  mask = 0x07; break;
+                default: mask = 0x00; break;
+                }
+        }
+        if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
+             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
+            (!(PCI_FUNC(dev->devfn) & 1)))
+                mask = 0x1f;
+
+        return mask;
+}
+
+static u8 svwks_csb_check (struct pci_dev *dev)
+{
+        switch (dev->device) {
+                case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
+                case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
+                case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
+                case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
+                        return 1;
+                default:
+                        break;
+        }
+        return 0;
+}
+
+static void svwks_set_pio_mode(ide_drive_t *drive, const u8 pio)
+{
+        static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
+        static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
+
+        struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+
+        pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
+
+        if (svwks_csb_check(dev)) {
+                u16 csb_pio = 0;
+
+                pci_read_config_word(dev, 0x4a, &csb_pio);
+
+                csb_pio &= ~(0x0f << (4 * drive->dn));
+                csb_pio |= (pio << (4 * drive->dn));
+
+                pci_write_config_word(dev, 0x4a, csb_pio);
+        }
+}
+
+static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
+{
+        static const u8 udma_modes[]            = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
+        static const u8 dma_modes[]             = { 0x77, 0x21, 0x20 };
+        static const u8 drive_pci2[]            = { 0x45, 0x44, 0x47, 0x46 };
+
+        ide_hwif_t *hwif        = HWIF(drive);
+        struct pci_dev *dev     = to_pci_dev(hwif->dev);
+        u8 unit                 = drive->dn & 1;
+
+        u8 ultra_enable  = 0, ultra_timing = 0, dma_timing = 0;
+
+        pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
+        pci_read_config_byte(dev, 0x54, &ultra_enable);
+
+        ultra_timing    &= ~(0x0F << (4*unit));
+        ultra_enable    &= ~(0x01 << drive->dn);
+
+        if (speed >= XFER_UDMA_0) {
+                dma_timing   |= dma_modes[2];
+                ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
+                ultra_enable |= (0x01 << drive->dn);
+        } else if (speed >= XFER_MW_DMA_0)
+                dma_timing   |= dma_modes[speed - XFER_MW_DMA_0];
+
+        pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
+        pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
+        pci_write_config_byte(dev, 0x54, ultra_enable);
+}
+
+static unsigned int init_chipset_svwks(struct pci_dev *dev)
+{
+        unsigned int reg;
+        u8 btr;
+
+        /* force Master Latency Timer value to 64 PCICLKs */
+        pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
+
+        /* OSB4 : South Bridge and IDE */
+        if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
+                isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+                          PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
+                if (isa_dev) {
+                        pci_read_config_dword(isa_dev, 0x64, &reg);
+                        reg &= ~0x00002000; /* disable 600ns interrupt mask */
+                        if(!(reg & 0x00004000))
+                                printk(KERN_DEBUG DRV_NAME " %s: UDMA not BIOS "
+                                        "enabled.\n", pci_name(dev));
+                        reg |=  0x00004000; /* enable UDMA/33 support */
+                        pci_write_config_dword(isa_dev, 0x64, reg);
+                }
+        }
+
+        /* setup CSB5/CSB6 : South Bridge and IDE option RAID */
+        else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
+                 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
+                 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
+
+                /* Third Channel Test */
+                if (!(PCI_FUNC(dev->devfn) & 1)) {
+                        struct pci_dev * findev = NULL;
+                        u32 reg4c = 0;
+                        findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+                                PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
+                        if (findev) {
+                                pci_read_config_dword(findev, 0x4C, &reg4c);
+                                reg4c &= ~0x000007FF;
+                                reg4c |=  0x00000040;
+                                reg4c |=  0x00000020;
+                                pci_write_config_dword(findev, 0x4C, reg4c);
+                                pci_dev_put(findev);
+                        }
+                        outb_p(0x06, 0x0c00);
+                        dev->irq = inb_p(0x0c01);
+                } else {
+                        struct pci_dev * findev = NULL;
+                        u8 reg41 = 0;
+
+                        findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+                                        PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
+                        if (findev) {
+                                pci_read_config_byte(findev, 0x41, &reg41);
+                                reg41 &= ~0x40;
+                                pci_write_config_byte(findev, 0x41, reg41);
+                                pci_dev_put(findev);
+                        }
+                        /*
+                         * This is a device pin issue on CSB6.
+                         * Since there will be a future raid mode,
+                         * early versions of the chipset require the
+                         * interrupt pin to be set, and it is a compatibility
+                         * mode issue.
+                         */
+                        if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
+                                dev->irq = 0;
+                }
+//              pci_read_config_dword(dev, 0x40, &pioreg)
+//              pci_write_config_dword(dev, 0x40, 0x99999999);
+//              pci_read_config_dword(dev, 0x44, &dmareg);
+//              pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
+                /* setup the UDMA Control register
+                 *
+                 * 1. clear bit 6 to enable DMA
+                 * 2. enable DMA modes with bits 0-1
+                 *      00 : legacy
+                 *      01 : udma2
+                 *      10 : udma2/udma4
+                 *      11 : udma2/udma4/udma5
+                 */
+                pci_read_config_byte(dev, 0x5A, &btr);
+                btr &= ~0x40;
+                if (!(PCI_FUNC(dev->devfn) & 1))
+                        btr |= 0x2;
+                else
+                        btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
+                pci_write_config_byte(dev, 0x5A, btr);
+        }
+        /* Setup HT1000 SouthBridge Controller - Single Channel Only */
+        else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
+                pci_read_config_byte(dev, 0x5A, &btr);
+                btr &= ~0x40;
+                btr |= 0x3;
+                pci_write_config_byte(dev, 0x5A, btr);
+        }
+
+        return dev->irq;
+}
+
+static u8 ata66_svwks_svwks(ide_hwif_t *hwif)
+{
+        return ATA_CBL_PATA80;
+}
+
+/* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
+ * of the subsystem device ID indicate presence of an 80-pin cable.
+ * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
+ * Bit 15 set   = secondary IDE channel has 80-pin cable.
+ * Bit 14 clear = primary IDE channel does not have 80-pin cable.
+ * Bit 14 set   = primary IDE channel has 80-pin cable.
+ */
+static u8 ata66_svwks_dell(ide_hwif_t *hwif)
+{
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+        if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
+            dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
+            (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
+             dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
+                return ((1 << (hwif->channel + 14)) &
+                        dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+        return ATA_CBL_PATA40;
+}
+
+/* Sun Cobalt Alpine hardware avoids the 80-pin cable
+ * detect issue by attaching the drives directly to the board.
+ * This check follows the Dell precedent (how scary is that?!)
+ *
+ * WARNING: this only works on Alpine hardware!
+ */
+static u8 ata66_svwks_cobalt(ide_hwif_t *hwif)
+{
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+        if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
+            dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
+            dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
+                return ((1 << (hwif->channel + 14)) &
+                        dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+        return ATA_CBL_PATA40;
+}
+
+static u8 svwks_cable_detect(ide_hwif_t *hwif)
+{
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+        /* Server Works */
+        if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
+                return ata66_svwks_svwks (hwif);
+        
+        /* Dell PowerEdge */
+        if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
+                return ata66_svwks_dell (hwif);
+
+        /* Cobalt Alpine */
+        if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
+                return ata66_svwks_cobalt (hwif);
+
+        /* Per Specified Design by OEM, and ASIC Architect */
+        if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
+            (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
+                return ATA_CBL_PATA80;
+
+        return ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops osb4_port_ops = {
+        .set_pio_mode           = svwks_set_pio_mode,
+        .set_dma_mode           = svwks_set_dma_mode,
+        .udma_filter            = svwks_udma_filter,
+};
+
+static const struct ide_port_ops svwks_port_ops = {
+        .set_pio_mode           = svwks_set_pio_mode,
+        .set_dma_mode           = svwks_set_dma_mode,
+        .udma_filter            = svwks_udma_filter,
+        .cable_detect           = svwks_cable_detect,
+};
+
+#define IDE_HFLAGS_SVWKS IDE_HFLAG_LEGACY_IRQS
+
+static const struct ide_port_info serverworks_chipsets[] __devinitdata = {
+        {       /* 0: OSB4 */
+                .name           = DRV_NAME,
+                .init_chipset   = init_chipset_svwks,
+                .port_ops       = &osb4_port_ops,
+                .host_flags     = IDE_HFLAGS_SVWKS,
+                .pio_mask       = ATA_PIO4,
+                .mwdma_mask     = ATA_MWDMA2,
+                .udma_mask      = 0x00, /* UDMA is problematic on OSB4 */
+        },
+        {       /* 1: CSB5 */
+                .name           = DRV_NAME,
+                .init_chipset   = init_chipset_svwks,
+                .port_ops       = &svwks_port_ops,
+                .host_flags     = IDE_HFLAGS_SVWKS,
+                .pio_mask       = ATA_PIO4,
+                .mwdma_mask     = ATA_MWDMA2,
+                .udma_mask      = ATA_UDMA5,
+        },
+        {       /* 2: CSB6 */
+                .name           = DRV_NAME,
+                .init_chipset   = init_chipset_svwks,
+                .port_ops       = &svwks_port_ops,
+                .host_flags     = IDE_HFLAGS_SVWKS,
+                .pio_mask       = ATA_PIO4,
+                .mwdma_mask     = ATA_MWDMA2,
+                .udma_mask      = ATA_UDMA5,
+        },
+        {       /* 3: CSB6-2 */
+                .name           = DRV_NAME,
+                .init_chipset   = init_chipset_svwks,
+                .port_ops       = &svwks_port_ops,
+                .host_flags     = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
+                .pio_mask       = ATA_PIO4,
+                .mwdma_mask     = ATA_MWDMA2,
+                .udma_mask      = ATA_UDMA5,
+        },
+        {       /* 4: HT1000 */
+                .name           = DRV_NAME,
+                .init_chipset   = init_chipset_svwks,
+                .port_ops       = &svwks_port_ops,
+                .host_flags     = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE,
+                .pio_mask       = ATA_PIO4,
+                .mwdma_mask     = ATA_MWDMA2,
+                .udma_mask      = ATA_UDMA5,
+        }
+};
+
+/**
+ *      svwks_init_one  -       called when a OSB/CSB is found
+ *      @dev: the svwks device
+ *      @id: the matching pci id
+ *
+ *      Called when the PCI registration layer (or the IDE initialization)
+ *      finds a device matching our IDE device tables.
+ */
+ 
+static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        struct ide_port_info d;
+        u8 idx = id->driver_data;
+
+        d = serverworks_chipsets[idx];
+
+        if (idx == 1)
+                d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
+        else if (idx == 2 || idx == 3) {
+                if ((PCI_FUNC(dev->devfn) & 1) == 0) {
+                        if (pci_resource_start(dev, 0) != 0x01f1)
+                                d.host_flags |= IDE_HFLAG_NON_BOOTABLE;
+                        d.host_flags |= IDE_HFLAG_SINGLE;
+                } else
+                        d.host_flags &= ~IDE_HFLAG_SINGLE;
+        }
+
+        return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id svwks_pci_tbl[] = {
+        { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE),   0 },
+        { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE),   1 },
+        { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE),   2 },
+        { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2),  3 },
+        { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
+        { 0, },
+};
+MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
+
+static struct pci_driver svwks_pci_driver = {
+        .name           = "Serverworks_IDE",
+        .id_table       = svwks_pci_tbl,
+        .probe          = svwks_init_one,
+        .remove         = ide_pci_remove,
+        .suspend        = ide_pci_suspend,
+        .resume         = ide_pci_resume,
+};
+
+static int __init svwks_ide_init(void)
+{
+        return ide_pci_register_driver(&svwks_pci_driver);
+}
+
+static void __exit svwks_ide_exit(void)
+{
+        pci_unregister_driver(&svwks_pci_driver);
+}
+
+module_init(svwks_ide_init);
+module_exit(svwks_ide_exit);
+
+MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
+MODULE_LICENSE("GPL");