| /* |
| * linux/drivers/ide/pci/serverworks.c Version 0.22 Jun 27 2007 |
| * |
| * 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/ioport.h> |
| #include <linux/pci.h> |
| #include <linux/hdreg.h> |
| #include <linux/ide.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| |
| #include <asm/io.h> |
| |
| #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) |
| { |
| while (*list) |
| if (!strcmp(*list++, drive->id->model)) |
| return 1; |
| return 0; |
| } |
| |
| static u8 svwks_udma_filter(ide_drive_t *drive) |
| { |
| struct pci_dev *dev = HWIF(drive)->pci_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, ®); |
| |
| /* |
| * 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 = drive->hwif->pci_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 = hwif->pci_dev; |
| u8 unit = (drive->select.b.unit & 0x01); |
| |
| u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0; |
| |
| /* If we are about to put a disk into UDMA mode we screwed up. |
| Our code assumes we never _ever_ do this on an OSB4 */ |
| |
| if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 && |
| drive->media == ide_disk && speed >= XFER_UDMA_0) |
| BUG(); |
| |
| 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); |
| |
| switch(speed) { |
| case XFER_MW_DMA_2: |
| case XFER_MW_DMA_1: |
| case XFER_MW_DMA_0: |
| dma_timing |= dma_modes[speed - XFER_MW_DMA_0]; |
| break; |
| |
| case XFER_UDMA_5: |
| case XFER_UDMA_4: |
| case XFER_UDMA_3: |
| case XFER_UDMA_2: |
| case XFER_UDMA_1: |
| case XFER_UDMA_0: |
| dma_timing |= dma_modes[2]; |
| ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit)); |
| ultra_enable |= (0x01 << drive->dn); |
| default: |
| break; |
| } |
| |
| 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 __devinit init_chipset_svwks (struct pci_dev *dev, const char *name) |
| { |
| 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 &= ~0x00002000; /* disable 600ns interrupt mask */ |
| if(!(reg & 0x00004000)) |
| printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name); |
| 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, ®4c); |
| 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, ®41); |
| 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 __devinit 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 __devinit ata66_svwks_dell(ide_hwif_t *hwif) |
| { |
| struct pci_dev *dev = hwif->pci_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 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif) |
| { |
| struct pci_dev *dev = hwif->pci_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 __devinit ata66_svwks(ide_hwif_t *hwif) |
| { |
| struct pci_dev *dev = hwif->pci_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 void __devinit init_hwif_svwks (ide_hwif_t *hwif) |
| { |
| hwif->set_pio_mode = &svwks_set_pio_mode; |
| hwif->set_dma_mode = &svwks_set_dma_mode; |
| hwif->udma_filter = &svwks_udma_filter; |
| |
| if (!hwif->dma_base) |
| return; |
| |
| if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) { |
| if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
| hwif->cbl = ata66_svwks(hwif); |
| } |
| } |
| |
| static ide_pci_device_t serverworks_chipsets[] __devinitdata = { |
| { /* 0 */ |
| .name = "SvrWks OSB4", |
| .init_chipset = init_chipset_svwks, |
| .init_hwif = init_hwif_svwks, |
| .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE, |
| .pio_mask = ATA_PIO4, |
| .mwdma_mask = ATA_MWDMA2, |
| .udma_mask = 0x00, /* UDMA is problematic on OSB4 */ |
| },{ /* 1 */ |
| .name = "SvrWks CSB5", |
| .init_chipset = init_chipset_svwks, |
| .init_hwif = init_hwif_svwks, |
| .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE, |
| .pio_mask = ATA_PIO4, |
| .mwdma_mask = ATA_MWDMA2, |
| .udma_mask = ATA_UDMA5, |
| },{ /* 2 */ |
| .name = "SvrWks CSB6", |
| .init_chipset = init_chipset_svwks, |
| .init_hwif = init_hwif_svwks, |
| .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE, |
| .pio_mask = ATA_PIO4, |
| .mwdma_mask = ATA_MWDMA2, |
| .udma_mask = ATA_UDMA5, |
| },{ /* 3 */ |
| .name = "SvrWks CSB6", |
| .init_chipset = init_chipset_svwks, |
| .init_hwif = init_hwif_svwks, |
| .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_SINGLE | |
| IDE_HFLAG_BOOTABLE, |
| .pio_mask = ATA_PIO4, |
| .mwdma_mask = ATA_MWDMA2, |
| .udma_mask = ATA_UDMA5, |
| },{ /* 4 */ |
| .name = "SvrWks HT1000", |
| .init_chipset = init_chipset_svwks, |
| .init_hwif = init_hwif_svwks, |
| .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_SINGLE | |
| IDE_HFLAG_BOOTABLE, |
| .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) |
| { |
| ide_pci_device_t d; |
| u8 idx = id->driver_data; |
| |
| d = serverworks_chipsets[idx]; |
| |
| if (idx == 2 || idx == 3) { |
| if ((PCI_FUNC(dev->devfn) & 1) == 0) { |
| if (pci_resource_start(dev, 0) != 0x01f1) |
| d.host_flags &= ~IDE_HFLAG_BOOTABLE; |
| d.host_flags |= IDE_HFLAG_SINGLE; |
| } else |
| d.host_flags &= ~IDE_HFLAG_SINGLE; |
| } |
| |
| return ide_setup_pci_device(dev, &d); |
| } |
| |
| 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 driver = { |
| .name = "Serverworks_IDE", |
| .id_table = svwks_pci_tbl, |
| .probe = svwks_init_one, |
| }; |
| |
| static int __init svwks_ide_init(void) |
| { |
| return ide_pci_register_driver(&driver); |
| } |
| |
| module_init(svwks_ide_init); |
| |
| MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick"); |
| MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE"); |
| MODULE_LICENSE("GPL"); |