615 lines
20 KiB
C
615 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* pci_sabre.c: Sabre specific PCI controller support.
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*
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* Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/of_device.h>
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#include <asm/apb.h>
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#include <asm/iommu.h>
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#include <asm/irq.h>
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#include <asm/prom.h>
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#include <asm/upa.h>
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#include "pci_impl.h"
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#include "iommu_common.h"
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#include "psycho_common.h"
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#define DRIVER_NAME "sabre"
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#define PFX DRIVER_NAME ": "
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/* SABRE PCI controller register offsets and definitions. */
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#define SABRE_UE_AFSR 0x0030UL
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#define SABRE_UEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
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#define SABRE_UEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
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#define SABRE_UEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
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#define SABRE_UEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
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#define SABRE_UEAFSR_SDTE 0x0200000000000000UL /* Secondary DMA Translation Error */
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#define SABRE_UEAFSR_PDTE 0x0100000000000000UL /* Primary DMA Translation Error */
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#define SABRE_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
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#define SABRE_UEAFSR_OFF 0x00000000e0000000UL /* Offset (AFAR bits [5:3] */
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#define SABRE_UEAFSR_BLK 0x0000000000800000UL /* Was block operation */
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#define SABRE_UECE_AFAR 0x0038UL
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#define SABRE_CE_AFSR 0x0040UL
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#define SABRE_CEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
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#define SABRE_CEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
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#define SABRE_CEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
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#define SABRE_CEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
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#define SABRE_CEAFSR_ESYND 0x00ff000000000000UL /* ECC Syndrome */
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#define SABRE_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
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#define SABRE_CEAFSR_OFF 0x00000000e0000000UL /* Offset */
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#define SABRE_CEAFSR_BLK 0x0000000000800000UL /* Was block operation */
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#define SABRE_UECE_AFAR_ALIAS 0x0048UL /* Aliases to 0x0038 */
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#define SABRE_IOMMU_CONTROL 0x0200UL
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#define SABRE_IOMMUCTRL_ERRSTS 0x0000000006000000UL /* Error status bits */
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#define SABRE_IOMMUCTRL_ERR 0x0000000001000000UL /* Error present in IOTLB */
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#define SABRE_IOMMUCTRL_LCKEN 0x0000000000800000UL /* IOTLB lock enable */
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#define SABRE_IOMMUCTRL_LCKPTR 0x0000000000780000UL /* IOTLB lock pointer */
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#define SABRE_IOMMUCTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
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#define SABRE_IOMMU_TSBSZ_1K 0x0000000000000000
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#define SABRE_IOMMU_TSBSZ_2K 0x0000000000010000
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#define SABRE_IOMMU_TSBSZ_4K 0x0000000000020000
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#define SABRE_IOMMU_TSBSZ_8K 0x0000000000030000
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#define SABRE_IOMMU_TSBSZ_16K 0x0000000000040000
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#define SABRE_IOMMU_TSBSZ_32K 0x0000000000050000
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#define SABRE_IOMMU_TSBSZ_64K 0x0000000000060000
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#define SABRE_IOMMU_TSBSZ_128K 0x0000000000070000
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#define SABRE_IOMMUCTRL_TBWSZ 0x0000000000000004UL /* TSB assumed page size */
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#define SABRE_IOMMUCTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
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#define SABRE_IOMMUCTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
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#define SABRE_IOMMU_TSBBASE 0x0208UL
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#define SABRE_IOMMU_FLUSH 0x0210UL
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#define SABRE_IMAP_A_SLOT0 0x0c00UL
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#define SABRE_IMAP_B_SLOT0 0x0c20UL
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#define SABRE_IMAP_SCSI 0x1000UL
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#define SABRE_IMAP_ETH 0x1008UL
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#define SABRE_IMAP_BPP 0x1010UL
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#define SABRE_IMAP_AU_REC 0x1018UL
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#define SABRE_IMAP_AU_PLAY 0x1020UL
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#define SABRE_IMAP_PFAIL 0x1028UL
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#define SABRE_IMAP_KMS 0x1030UL
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#define SABRE_IMAP_FLPY 0x1038UL
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#define SABRE_IMAP_SHW 0x1040UL
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#define SABRE_IMAP_KBD 0x1048UL
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#define SABRE_IMAP_MS 0x1050UL
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#define SABRE_IMAP_SER 0x1058UL
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#define SABRE_IMAP_UE 0x1070UL
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#define SABRE_IMAP_CE 0x1078UL
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#define SABRE_IMAP_PCIERR 0x1080UL
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#define SABRE_IMAP_GFX 0x1098UL
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#define SABRE_IMAP_EUPA 0x10a0UL
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#define SABRE_ICLR_A_SLOT0 0x1400UL
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#define SABRE_ICLR_B_SLOT0 0x1480UL
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#define SABRE_ICLR_SCSI 0x1800UL
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#define SABRE_ICLR_ETH 0x1808UL
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#define SABRE_ICLR_BPP 0x1810UL
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#define SABRE_ICLR_AU_REC 0x1818UL
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#define SABRE_ICLR_AU_PLAY 0x1820UL
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#define SABRE_ICLR_PFAIL 0x1828UL
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#define SABRE_ICLR_KMS 0x1830UL
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#define SABRE_ICLR_FLPY 0x1838UL
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#define SABRE_ICLR_SHW 0x1840UL
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#define SABRE_ICLR_KBD 0x1848UL
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#define SABRE_ICLR_MS 0x1850UL
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#define SABRE_ICLR_SER 0x1858UL
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#define SABRE_ICLR_UE 0x1870UL
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#define SABRE_ICLR_CE 0x1878UL
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#define SABRE_ICLR_PCIERR 0x1880UL
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#define SABRE_WRSYNC 0x1c20UL
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#define SABRE_PCICTRL 0x2000UL
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#define SABRE_PCICTRL_MRLEN 0x0000001000000000UL /* Use MemoryReadLine for block loads/stores */
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#define SABRE_PCICTRL_SERR 0x0000000400000000UL /* Set when SERR asserted on PCI bus */
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#define SABRE_PCICTRL_ARBPARK 0x0000000000200000UL /* Bus Parking 0=Ultra-IIi 1=prev-bus-owner */
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#define SABRE_PCICTRL_CPUPRIO 0x0000000000100000UL /* Ultra-IIi granted every other bus cycle */
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#define SABRE_PCICTRL_ARBPRIO 0x00000000000f0000UL /* Slot which is granted every other bus cycle */
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#define SABRE_PCICTRL_ERREN 0x0000000000000100UL /* PCI Error Interrupt Enable */
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#define SABRE_PCICTRL_RTRYWE 0x0000000000000080UL /* DMA Flow Control 0=wait-if-possible 1=retry */
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#define SABRE_PCICTRL_AEN 0x000000000000000fUL /* Slot PCI arbitration enables */
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#define SABRE_PIOAFSR 0x2010UL
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#define SABRE_PIOAFSR_PMA 0x8000000000000000UL /* Primary Master Abort */
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#define SABRE_PIOAFSR_PTA 0x4000000000000000UL /* Primary Target Abort */
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#define SABRE_PIOAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */
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#define SABRE_PIOAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */
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#define SABRE_PIOAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort */
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#define SABRE_PIOAFSR_STA 0x0400000000000000UL /* Secondary Target Abort */
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#define SABRE_PIOAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */
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#define SABRE_PIOAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */
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#define SABRE_PIOAFSR_BMSK 0x0000ffff00000000UL /* Byte Mask */
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#define SABRE_PIOAFSR_BLK 0x0000000080000000UL /* Was Block Operation */
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#define SABRE_PIOAFAR 0x2018UL
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#define SABRE_PCIDIAG 0x2020UL
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#define SABRE_PCIDIAG_DRTRY 0x0000000000000040UL /* Disable PIO Retry Limit */
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#define SABRE_PCIDIAG_IPAPAR 0x0000000000000008UL /* Invert PIO Address Parity */
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#define SABRE_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO Data Parity */
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#define SABRE_PCIDIAG_IDDPAR 0x0000000000000002UL /* Invert DMA Data Parity */
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#define SABRE_PCIDIAG_ELPBK 0x0000000000000001UL /* Loopback Enable - not supported */
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#define SABRE_PCITASR 0x2028UL
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#define SABRE_PCITASR_EF 0x0000000000000080UL /* Respond to 0xe0000000-0xffffffff */
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#define SABRE_PCITASR_CD 0x0000000000000040UL /* Respond to 0xc0000000-0xdfffffff */
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#define SABRE_PCITASR_AB 0x0000000000000020UL /* Respond to 0xa0000000-0xbfffffff */
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#define SABRE_PCITASR_89 0x0000000000000010UL /* Respond to 0x80000000-0x9fffffff */
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#define SABRE_PCITASR_67 0x0000000000000008UL /* Respond to 0x60000000-0x7fffffff */
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#define SABRE_PCITASR_45 0x0000000000000004UL /* Respond to 0x40000000-0x5fffffff */
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#define SABRE_PCITASR_23 0x0000000000000002UL /* Respond to 0x20000000-0x3fffffff */
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#define SABRE_PCITASR_01 0x0000000000000001UL /* Respond to 0x00000000-0x1fffffff */
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#define SABRE_PIOBUF_DIAG 0x5000UL
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#define SABRE_DMABUF_DIAGLO 0x5100UL
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#define SABRE_DMABUF_DIAGHI 0x51c0UL
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#define SABRE_IMAP_GFX_ALIAS 0x6000UL /* Aliases to 0x1098 */
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#define SABRE_IMAP_EUPA_ALIAS 0x8000UL /* Aliases to 0x10a0 */
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#define SABRE_IOMMU_VADIAG 0xa400UL
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#define SABRE_IOMMU_TCDIAG 0xa408UL
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#define SABRE_IOMMU_TAG 0xa580UL
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#define SABRE_IOMMUTAG_ERRSTS 0x0000000001800000UL /* Error status bits */
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#define SABRE_IOMMUTAG_ERR 0x0000000000400000UL /* Error present */
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#define SABRE_IOMMUTAG_WRITE 0x0000000000200000UL /* Page is writable */
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#define SABRE_IOMMUTAG_STREAM 0x0000000000100000UL /* Streamable bit - unused */
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#define SABRE_IOMMUTAG_SIZE 0x0000000000080000UL /* 0=8k 1=16k */
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#define SABRE_IOMMUTAG_VPN 0x000000000007ffffUL /* Virtual Page Number [31:13] */
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#define SABRE_IOMMU_DATA 0xa600UL
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#define SABRE_IOMMUDATA_VALID 0x0000000040000000UL /* Valid */
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#define SABRE_IOMMUDATA_USED 0x0000000020000000UL /* Used (for LRU algorithm) */
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#define SABRE_IOMMUDATA_CACHE 0x0000000010000000UL /* Cacheable */
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#define SABRE_IOMMUDATA_PPN 0x00000000001fffffUL /* Physical Page Number [33:13] */
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#define SABRE_PCI_IRQSTATE 0xa800UL
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#define SABRE_OBIO_IRQSTATE 0xa808UL
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#define SABRE_FFBCFG 0xf000UL
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#define SABRE_FFBCFG_SPRQS 0x000000000f000000 /* Slave P_RQST queue size */
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#define SABRE_FFBCFG_ONEREAD 0x0000000000004000 /* Slave supports one outstanding read */
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#define SABRE_MCCTRL0 0xf010UL
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#define SABRE_MCCTRL0_RENAB 0x0000000080000000 /* Refresh Enable */
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#define SABRE_MCCTRL0_EENAB 0x0000000010000000 /* Enable all ECC functions */
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#define SABRE_MCCTRL0_11BIT 0x0000000000001000 /* Enable 11-bit column addressing */
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#define SABRE_MCCTRL0_DPP 0x0000000000000f00 /* DIMM Pair Present Bits */
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#define SABRE_MCCTRL0_RINTVL 0x00000000000000ff /* Refresh Interval */
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#define SABRE_MCCTRL1 0xf018UL
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#define SABRE_MCCTRL1_AMDC 0x0000000038000000 /* Advance Memdata Clock */
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#define SABRE_MCCTRL1_ARDC 0x0000000007000000 /* Advance DRAM Read Data Clock */
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#define SABRE_MCCTRL1_CSR 0x0000000000e00000 /* CAS to RAS delay for CBR refresh */
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#define SABRE_MCCTRL1_CASRW 0x00000000001c0000 /* CAS length for read/write */
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#define SABRE_MCCTRL1_RCD 0x0000000000038000 /* RAS to CAS delay */
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#define SABRE_MCCTRL1_CP 0x0000000000007000 /* CAS Precharge */
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#define SABRE_MCCTRL1_RP 0x0000000000000e00 /* RAS Precharge */
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#define SABRE_MCCTRL1_RAS 0x00000000000001c0 /* Length of RAS for refresh */
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#define SABRE_MCCTRL1_CASRW2 0x0000000000000038 /* Must be same as CASRW */
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#define SABRE_MCCTRL1_RSC 0x0000000000000007 /* RAS after CAS hold time */
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#define SABRE_RESETCTRL 0xf020UL
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#define SABRE_CONFIGSPACE 0x001000000UL
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#define SABRE_IOSPACE 0x002000000UL
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#define SABRE_IOSPACE_SIZE 0x000ffffffUL
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#define SABRE_MEMSPACE 0x100000000UL
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#define SABRE_MEMSPACE_SIZE 0x07fffffffUL
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static int hummingbird_p;
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static struct pci_bus *sabre_root_bus;
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static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
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{
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struct pci_pbm_info *pbm = dev_id;
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unsigned long afsr_reg = pbm->controller_regs + SABRE_UE_AFSR;
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unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
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unsigned long afsr, afar, error_bits;
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int reported;
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/* Latch uncorrectable error status. */
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afar = upa_readq(afar_reg);
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afsr = upa_readq(afsr_reg);
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/* Clear the primary/secondary error status bits. */
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error_bits = afsr &
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(SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
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SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
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SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE);
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if (!error_bits)
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return IRQ_NONE;
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upa_writeq(error_bits, afsr_reg);
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/* Log the error. */
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printk("%s: Uncorrectable Error, primary error type[%s%s]\n",
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pbm->name,
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((error_bits & SABRE_UEAFSR_PDRD) ?
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"DMA Read" :
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((error_bits & SABRE_UEAFSR_PDWR) ?
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"DMA Write" : "???")),
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((error_bits & SABRE_UEAFSR_PDTE) ?
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":Translation Error" : ""));
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printk("%s: bytemask[%04lx] dword_offset[%lx] was_block(%d)\n",
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pbm->name,
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(afsr & SABRE_UEAFSR_BMSK) >> 32UL,
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(afsr & SABRE_UEAFSR_OFF) >> 29UL,
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((afsr & SABRE_UEAFSR_BLK) ? 1 : 0));
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printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
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printk("%s: UE Secondary errors [", pbm->name);
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reported = 0;
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if (afsr & SABRE_UEAFSR_SDRD) {
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reported++;
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printk("(DMA Read)");
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}
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if (afsr & SABRE_UEAFSR_SDWR) {
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reported++;
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printk("(DMA Write)");
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}
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if (afsr & SABRE_UEAFSR_SDTE) {
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reported++;
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printk("(Translation Error)");
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}
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if (!reported)
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printk("(none)");
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printk("]\n");
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/* Interrogate IOMMU for error status. */
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psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
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return IRQ_HANDLED;
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}
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static irqreturn_t sabre_ce_intr(int irq, void *dev_id)
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{
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struct pci_pbm_info *pbm = dev_id;
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unsigned long afsr_reg = pbm->controller_regs + SABRE_CE_AFSR;
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unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
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unsigned long afsr, afar, error_bits;
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int reported;
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/* Latch error status. */
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afar = upa_readq(afar_reg);
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afsr = upa_readq(afsr_reg);
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/* Clear primary/secondary error status bits. */
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error_bits = afsr &
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(SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
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SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR);
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if (!error_bits)
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return IRQ_NONE;
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upa_writeq(error_bits, afsr_reg);
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/* Log the error. */
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printk("%s: Correctable Error, primary error type[%s]\n",
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pbm->name,
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((error_bits & SABRE_CEAFSR_PDRD) ?
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"DMA Read" :
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((error_bits & SABRE_CEAFSR_PDWR) ?
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"DMA Write" : "???")));
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/* XXX Use syndrome and afar to print out module string just like
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* XXX UDB CE trap handler does... -DaveM
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*/
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printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
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"was_block(%d)\n",
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pbm->name,
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(afsr & SABRE_CEAFSR_ESYND) >> 48UL,
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(afsr & SABRE_CEAFSR_BMSK) >> 32UL,
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(afsr & SABRE_CEAFSR_OFF) >> 29UL,
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((afsr & SABRE_CEAFSR_BLK) ? 1 : 0));
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printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
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printk("%s: CE Secondary errors [", pbm->name);
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reported = 0;
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if (afsr & SABRE_CEAFSR_SDRD) {
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reported++;
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printk("(DMA Read)");
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}
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if (afsr & SABRE_CEAFSR_SDWR) {
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reported++;
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printk("(DMA Write)");
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}
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if (!reported)
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printk("(none)");
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printk("]\n");
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return IRQ_HANDLED;
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}
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static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
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{
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struct device_node *dp = pbm->op->dev.of_node;
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struct platform_device *op;
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unsigned long base = pbm->controller_regs;
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u64 tmp;
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int err;
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if (pbm->chip_type == PBM_CHIP_TYPE_SABRE)
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dp = dp->parent;
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op = of_find_device_by_node(dp);
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if (!op)
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return;
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/* Sabre/Hummingbird IRQ property layout is:
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* 0: PCI ERR
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* 1: UE ERR
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* 2: CE ERR
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* 3: POWER FAIL
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*/
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if (op->archdata.num_irqs < 4)
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return;
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/* We clear the error bits in the appropriate AFSR before
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* registering the handler so that we don't get spurious
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* interrupts.
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*/
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upa_writeq((SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
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SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
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SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE),
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base + SABRE_UE_AFSR);
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err = request_irq(op->archdata.irqs[1], sabre_ue_intr, 0, "SABRE_UE", pbm);
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if (err)
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printk(KERN_WARNING "%s: Couldn't register UE, err=%d.\n",
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pbm->name, err);
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upa_writeq((SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
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SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR),
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base + SABRE_CE_AFSR);
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|
|
err = request_irq(op->archdata.irqs[2], sabre_ce_intr, 0, "SABRE_CE", pbm);
|
|
if (err)
|
|
printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n",
|
|
pbm->name, err);
|
|
err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, 0,
|
|
"SABRE_PCIERR", pbm);
|
|
if (err)
|
|
printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
|
|
pbm->name, err);
|
|
|
|
tmp = upa_readq(base + SABRE_PCICTRL);
|
|
tmp |= SABRE_PCICTRL_ERREN;
|
|
upa_writeq(tmp, base + SABRE_PCICTRL);
|
|
}
|
|
|
|
static void apb_init(struct pci_bus *sabre_bus)
|
|
{
|
|
struct pci_dev *pdev;
|
|
|
|
list_for_each_entry(pdev, &sabre_bus->devices, bus_list) {
|
|
if (pdev->vendor == PCI_VENDOR_ID_SUN &&
|
|
pdev->device == PCI_DEVICE_ID_SUN_SIMBA) {
|
|
u16 word16;
|
|
|
|
pci_read_config_word(pdev, PCI_COMMAND, &word16);
|
|
word16 |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
|
|
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY |
|
|
PCI_COMMAND_IO;
|
|
pci_write_config_word(pdev, PCI_COMMAND, word16);
|
|
|
|
/* Status register bits are "write 1 to clear". */
|
|
pci_write_config_word(pdev, PCI_STATUS, 0xffff);
|
|
pci_write_config_word(pdev, PCI_SEC_STATUS, 0xffff);
|
|
|
|
/* Use a primary/seconday latency timer value
|
|
* of 64.
|
|
*/
|
|
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
|
|
pci_write_config_byte(pdev, PCI_SEC_LATENCY_TIMER, 64);
|
|
|
|
/* Enable reporting/forwarding of master aborts,
|
|
* parity, and SERR.
|
|
*/
|
|
pci_write_config_byte(pdev, PCI_BRIDGE_CONTROL,
|
|
(PCI_BRIDGE_CTL_PARITY |
|
|
PCI_BRIDGE_CTL_SERR |
|
|
PCI_BRIDGE_CTL_MASTER_ABORT));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sabre_scan_bus(struct pci_pbm_info *pbm, struct device *parent)
|
|
{
|
|
static int once;
|
|
|
|
/* The APB bridge speaks to the Sabre host PCI bridge
|
|
* at 66Mhz, but the front side of APB runs at 33Mhz
|
|
* for both segments.
|
|
*
|
|
* Hummingbird systems do not use APB, so they run
|
|
* at 66MHZ.
|
|
*/
|
|
if (hummingbird_p)
|
|
pbm->is_66mhz_capable = 1;
|
|
else
|
|
pbm->is_66mhz_capable = 0;
|
|
|
|
/* This driver has not been verified to handle
|
|
* multiple SABREs yet, so trap this.
|
|
*
|
|
* Also note that the SABRE host bridge is hardwired
|
|
* to live at bus 0.
|
|
*/
|
|
if (once != 0) {
|
|
printk(KERN_ERR PFX "Multiple controllers unsupported.\n");
|
|
return;
|
|
}
|
|
once++;
|
|
|
|
pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
|
|
if (!pbm->pci_bus)
|
|
return;
|
|
|
|
sabre_root_bus = pbm->pci_bus;
|
|
|
|
apb_init(pbm->pci_bus);
|
|
|
|
sabre_register_error_handlers(pbm);
|
|
}
|
|
|
|
static void sabre_pbm_init(struct pci_pbm_info *pbm,
|
|
struct platform_device *op)
|
|
{
|
|
psycho_pbm_init_common(pbm, op, "SABRE", PBM_CHIP_TYPE_SABRE);
|
|
pbm->pci_afsr = pbm->controller_regs + SABRE_PIOAFSR;
|
|
pbm->pci_afar = pbm->controller_regs + SABRE_PIOAFAR;
|
|
pbm->pci_csr = pbm->controller_regs + SABRE_PCICTRL;
|
|
sabre_scan_bus(pbm, &op->dev);
|
|
}
|
|
|
|
static const struct of_device_id sabre_match[];
|
|
static int sabre_probe(struct platform_device *op)
|
|
{
|
|
const struct of_device_id *match;
|
|
const struct linux_prom64_registers *pr_regs;
|
|
struct device_node *dp = op->dev.of_node;
|
|
struct pci_pbm_info *pbm;
|
|
u32 upa_portid, dma_mask;
|
|
struct iommu *iommu;
|
|
int tsbsize, err;
|
|
const u32 *vdma;
|
|
u64 clear_irq;
|
|
|
|
match = of_match_device(sabre_match, &op->dev);
|
|
hummingbird_p = match && (match->data != NULL);
|
|
if (!hummingbird_p) {
|
|
struct device_node *cpu_dp;
|
|
|
|
/* Of course, Sun has to encode things a thousand
|
|
* different ways, inconsistently.
|
|
*/
|
|
for_each_node_by_type(cpu_dp, "cpu") {
|
|
if (of_node_name_eq(cpu_dp, "SUNW,UltraSPARC-IIe"))
|
|
hummingbird_p = 1;
|
|
}
|
|
}
|
|
|
|
err = -ENOMEM;
|
|
pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
|
|
if (!pbm) {
|
|
printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
|
|
goto out_err;
|
|
}
|
|
|
|
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
|
|
if (!iommu) {
|
|
printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
|
|
goto out_free_controller;
|
|
}
|
|
|
|
pbm->iommu = iommu;
|
|
|
|
upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
|
|
|
|
pbm->portid = upa_portid;
|
|
|
|
/*
|
|
* Map in SABRE register set and report the presence of this SABRE.
|
|
*/
|
|
|
|
pr_regs = of_get_property(dp, "reg", NULL);
|
|
err = -ENODEV;
|
|
if (!pr_regs) {
|
|
printk(KERN_ERR PFX "No reg property\n");
|
|
goto out_free_iommu;
|
|
}
|
|
|
|
/*
|
|
* First REG in property is base of entire SABRE register space.
|
|
*/
|
|
pbm->controller_regs = pr_regs[0].phys_addr;
|
|
|
|
/* Clear interrupts */
|
|
|
|
/* PCI first */
|
|
for (clear_irq = SABRE_ICLR_A_SLOT0; clear_irq < SABRE_ICLR_B_SLOT0 + 0x80; clear_irq += 8)
|
|
upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
|
|
|
|
/* Then OBIO */
|
|
for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8)
|
|
upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
|
|
|
|
/* Error interrupts are enabled later after the bus scan. */
|
|
upa_writeq((SABRE_PCICTRL_MRLEN | SABRE_PCICTRL_SERR |
|
|
SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN),
|
|
pbm->controller_regs + SABRE_PCICTRL);
|
|
|
|
/* Now map in PCI config space for entire SABRE. */
|
|
pbm->config_space = pbm->controller_regs + SABRE_CONFIGSPACE;
|
|
|
|
vdma = of_get_property(dp, "virtual-dma", NULL);
|
|
if (!vdma) {
|
|
printk(KERN_ERR PFX "No virtual-dma property\n");
|
|
goto out_free_iommu;
|
|
}
|
|
|
|
dma_mask = vdma[0];
|
|
switch(vdma[1]) {
|
|
case 0x20000000:
|
|
dma_mask |= 0x1fffffff;
|
|
tsbsize = 64;
|
|
break;
|
|
case 0x40000000:
|
|
dma_mask |= 0x3fffffff;
|
|
tsbsize = 128;
|
|
break;
|
|
|
|
case 0x80000000:
|
|
dma_mask |= 0x7fffffff;
|
|
tsbsize = 128;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR PFX "Strange virtual-dma size.\n");
|
|
goto out_free_iommu;
|
|
}
|
|
|
|
err = psycho_iommu_init(pbm, tsbsize, vdma[0], dma_mask, SABRE_WRSYNC);
|
|
if (err)
|
|
goto out_free_iommu;
|
|
|
|
/*
|
|
* Look for APB underneath.
|
|
*/
|
|
sabre_pbm_init(pbm, op);
|
|
|
|
pbm->next = pci_pbm_root;
|
|
pci_pbm_root = pbm;
|
|
|
|
dev_set_drvdata(&op->dev, pbm);
|
|
|
|
return 0;
|
|
|
|
out_free_iommu:
|
|
kfree(pbm->iommu);
|
|
|
|
out_free_controller:
|
|
kfree(pbm);
|
|
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
static const struct of_device_id sabre_match[] = {
|
|
{
|
|
.name = "pci",
|
|
.compatible = "pci108e,a001",
|
|
.data = (void *) 1,
|
|
},
|
|
{
|
|
.name = "pci",
|
|
.compatible = "pci108e,a000",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver sabre_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.of_match_table = sabre_match,
|
|
},
|
|
.probe = sabre_probe,
|
|
};
|
|
|
|
static int __init sabre_init(void)
|
|
{
|
|
return platform_driver_register(&sabre_driver);
|
|
}
|
|
|
|
subsys_initcall(sabre_init);
|