// SPDX-License-Identifier: GPL-2.0-only /* * pata_serverworks.c - Serverworks PATA for new ATA layer * (C) 2005 Red Hat Inc * (C) 2010 Bartlomiej Zolnierkiewicz * * based upon * * serverworks.c * * Copyright (C) 1998-2000 Michel Aubry * Copyright (C) 1998-2000 Andrzej Krzysztofowicz * Copyright (C) 1998-2000 Andre Hedrick * 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) * * Documentation: * Available under NDA only. Errata info very hard to get. */ #include #include #include #include #include #include #include #define DRV_NAME "pata_serverworks" #define DRV_VERSION "0.4.3" #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 * const csb_bad_ata100[] = { "ST320011A", "ST340016A", "ST360021A", "ST380021A", NULL }; /** * oem_cable - Dell/Sun serverworks cable detection * @ap: ATA port to do cable detect * * Dell PowerEdge and Sun Cobalt 'Alpine' hide the 40/80 pin select * for their interfaces in the top two bits of the subsystem ID. */ static int oem_cable(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (pdev->subsystem_device & (1 << (ap->port_no + 14))) return ATA_CBL_PATA80; return ATA_CBL_PATA40; } struct sv_cable_table { int device; int subvendor; int (*cable_detect)(struct ata_port *ap); }; static struct sv_cable_table cable_detect[] = { { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, oem_cable }, { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, oem_cable }, { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, oem_cable }, { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, ata_cable_40wire }, { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, ata_cable_unknown }, { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, ata_cable_unknown }, { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, ata_cable_unknown }, { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, ata_cable_unknown }, { } }; /** * serverworks_cable_detect - cable detection * @ap: ATA port * * Perform cable detection according to the device and subvendor * identifications */ static int serverworks_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); struct sv_cable_table *cb = cable_detect; while(cb->device) { if (cb->device == pdev->device && (cb->subvendor == pdev->subsystem_vendor || cb->subvendor == PCI_ANY_ID)) { return cb->cable_detect(ap); } cb++; } BUG(); return -1; /* kill compiler warning */ } /** * serverworks_is_csb - Check for CSB or OSB * @pdev: PCI device to check * * Returns true if the device being checked is known to be a CSB * series device. */ static u8 serverworks_is_csb(struct pci_dev *pdev) { switch (pdev->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; } /** * serverworks_osb4_filter - mode selection filter * @adev: ATA device * @mask: Mask of proposed modes * * Filter the offered modes for the device to apply controller * specific rules. OSB4 requires no UDMA for disks due to a FIFO * bug we hit. */ static unsigned int serverworks_osb4_filter(struct ata_device *adev, unsigned int mask) { if (adev->class == ATA_DEV_ATA) mask &= ~ATA_MASK_UDMA; return mask; } /** * serverworks_csb_filter - mode selection filter * @adev: ATA device * @mask: Mask of proposed modes * * Check the list of devices with broken UDMA5 and * disable UDMA5 if matched. */ static unsigned int serverworks_csb_filter(struct ata_device *adev, unsigned int mask) { const char *p; char model_num[ATA_ID_PROD_LEN + 1]; int i; /* Disk, UDMA */ if (adev->class != ATA_DEV_ATA) return mask; /* Actually do need to check */ ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num)); for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) { if (!strcmp(p, model_num)) mask &= ~(0xE0 << ATA_SHIFT_UDMA); } return mask; } /** * serverworks_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the OSB4/CSB5 timing registers for PIO. The PIO register * load is done as a simple lookup. */ static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev) { static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 }; int offset = 1 + 2 * ap->port_no - adev->devno; int devbits = (2 * ap->port_no + adev->devno) * 4; u16 csb5_pio; struct pci_dev *pdev = to_pci_dev(ap->host->dev); int pio = adev->pio_mode - XFER_PIO_0; pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]); /* The OSB4 just requires the timing but the CSB series want the mode number as well */ if (serverworks_is_csb(pdev)) { pci_read_config_word(pdev, 0x4A, &csb5_pio); csb5_pio &= ~(0x0F << devbits); pci_write_config_word(pdev, 0x4A, csb5_pio | (pio << devbits)); } } /** * serverworks_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5 * chipset. The MWDMA mode values are pulled from a lookup table * while the chipset uses mode number for UDMA. */ static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev) { static const u8 dma_mode[] = { 0x77, 0x21, 0x20 }; int offset = 1 + 2 * ap->port_no - adev->devno; int devbits = 2 * ap->port_no + adev->devno; u8 ultra; u8 ultra_cfg; struct pci_dev *pdev = to_pci_dev(ap->host->dev); pci_read_config_byte(pdev, 0x54, &ultra_cfg); pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra); ultra &= ~(0x0F << (adev->devno * 4)); if (adev->dma_mode >= XFER_UDMA_0) { pci_write_config_byte(pdev, 0x44 + offset, 0x20); ultra |= (adev->dma_mode - XFER_UDMA_0) << (adev->devno * 4); ultra_cfg |= (1 << devbits); } else { pci_write_config_byte(pdev, 0x44 + offset, dma_mode[adev->dma_mode - XFER_MW_DMA_0]); ultra_cfg &= ~(1 << devbits); } pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra); pci_write_config_byte(pdev, 0x54, ultra_cfg); } static const struct scsi_host_template serverworks_osb4_sht = { ATA_BASE_SHT(DRV_NAME), .sg_tablesize = LIBATA_DUMB_MAX_PRD, .dma_boundary = ATA_DMA_BOUNDARY, }; static const struct scsi_host_template serverworks_csb_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations serverworks_osb4_port_ops = { .inherits = &ata_bmdma_port_ops, .qc_prep = ata_bmdma_dumb_qc_prep, .cable_detect = serverworks_cable_detect, .mode_filter = serverworks_osb4_filter, .set_piomode = serverworks_set_piomode, .set_dmamode = serverworks_set_dmamode, }; static struct ata_port_operations serverworks_csb_port_ops = { .inherits = &serverworks_osb4_port_ops, .qc_prep = ata_bmdma_qc_prep, .mode_filter = serverworks_csb_filter, }; static int serverworks_fixup_osb4(struct pci_dev *pdev) { u32 reg; struct pci_dev *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)) dev_info(&pdev->dev, "UDMA not BIOS enabled.\n"); reg |= 0x00004000; /* enable UDMA/33 support */ pci_write_config_dword(isa_dev, 0x64, reg); pci_dev_put(isa_dev); return 0; } dev_warn(&pdev->dev, "Unable to find bridge.\n"); return -ENODEV; } static int serverworks_fixup_csb(struct pci_dev *pdev) { u8 btr; /* Third Channel Test */ if (!(PCI_FUNC(pdev->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); } } 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); } } /* 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(pdev, 0x5A, &btr); btr &= ~0x40; if (!(PCI_FUNC(pdev->devfn) & 1)) btr |= 0x2; else btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2; pci_write_config_byte(pdev, 0x5A, btr); return btr; } static void serverworks_fixup_ht1000(struct pci_dev *pdev) { u8 btr; /* Setup HT1000 SouthBridge Controller - Single Channel Only */ pci_read_config_byte(pdev, 0x5A, &btr); btr &= ~0x40; btr |= 0x3; pci_write_config_byte(pdev, 0x5A, btr); } static int serverworks_fixup(struct pci_dev *pdev) { int rc = 0; /* Force master latency timer to 64 PCI clocks */ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40); switch (pdev->device) { case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE: rc = serverworks_fixup_osb4(pdev); break; case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: ata_pci_bmdma_clear_simplex(pdev); fallthrough; case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE: case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2: rc = serverworks_fixup_csb(pdev); break; case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE: serverworks_fixup_ht1000(pdev); break; } return rc; } static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id) { static const struct ata_port_info info[4] = { { /* OSB4 */ .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA2, .port_ops = &serverworks_osb4_port_ops }, { /* OSB4 no UDMA */ .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, /* No UDMA */ .port_ops = &serverworks_osb4_port_ops }, { /* CSB5 */ .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA4, .port_ops = &serverworks_csb_port_ops }, { /* CSB5 - later revisions*/ .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, .port_ops = &serverworks_csb_port_ops } }; const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL }; const struct scsi_host_template *sht = &serverworks_csb_sht; int rc; rc = pcim_enable_device(pdev); if (rc) return rc; rc = serverworks_fixup(pdev); /* OSB4 : South Bridge and IDE */ if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) { /* Select non UDMA capable OSB4 if we can't do fixups */ if (rc < 0) ppi[0] = &info[1]; sht = &serverworks_osb4_sht; } /* setup CSB5/CSB6 : South Bridge and IDE option RAID */ else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) || (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) || (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) { /* If the returned btr is the newer revision then select the right info block */ if (rc == 3) ppi[0] = &info[3]; /* Is this the 3rd channel CSB6 IDE ? */ if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) ppi[1] = &ata_dummy_port_info; } return ata_pci_bmdma_init_one(pdev, ppi, sht, NULL, 0); } #ifdef CONFIG_PM_SLEEP static int serverworks_reinit_one(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); int rc; rc = ata_pci_device_do_resume(pdev); if (rc) return rc; (void)serverworks_fixup(pdev); ata_host_resume(host); return 0; } #endif static const struct pci_device_id serverworks[] = { { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0}, { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2}, { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2}, { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2}, { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2}, { }, }; static struct pci_driver serverworks_pci_driver = { .name = DRV_NAME, .id_table = serverworks, .probe = serverworks_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM_SLEEP .suspend = ata_pci_device_suspend, .resume = serverworks_reinit_one, #endif }; module_pci_driver(serverworks_pci_driver); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, serverworks); MODULE_VERSION(DRV_VERSION);