Move libata to drivers/ata.
This commit is contained in:
Jeff Garzik
508
drivers/ata/sata_svw.c
Normal file
508
drivers/ata/sata_svw.c
Normal file
@@ -0,0 +1,508 @@
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/*
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* sata_svw.c - ServerWorks / Apple K2 SATA
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*
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* Maintained by: Benjamin Herrenschmidt <benh@kernel.crashing.org> and
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* Jeff Garzik <jgarzik@pobox.com>
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* Please ALWAYS copy linux-ide@vger.kernel.org
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* on emails.
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*
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* Copyright 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
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*
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* Bits from Jeff Garzik, Copyright RedHat, Inc.
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*
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* This driver probably works with non-Apple versions of the
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* Broadcom chipset...
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* Hardware documentation available under NDA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#ifdef CONFIG_PPC_OF
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#include <asm/prom.h>
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#include <asm/pci-bridge.h>
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#endif /* CONFIG_PPC_OF */
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#define DRV_NAME "sata_svw"
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#define DRV_VERSION "2.0"
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enum {
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/* Taskfile registers offsets */
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K2_SATA_TF_CMD_OFFSET = 0x00,
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K2_SATA_TF_DATA_OFFSET = 0x00,
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K2_SATA_TF_ERROR_OFFSET = 0x04,
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K2_SATA_TF_NSECT_OFFSET = 0x08,
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K2_SATA_TF_LBAL_OFFSET = 0x0c,
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K2_SATA_TF_LBAM_OFFSET = 0x10,
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K2_SATA_TF_LBAH_OFFSET = 0x14,
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K2_SATA_TF_DEVICE_OFFSET = 0x18,
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K2_SATA_TF_CMDSTAT_OFFSET = 0x1c,
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K2_SATA_TF_CTL_OFFSET = 0x20,
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/* DMA base */
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K2_SATA_DMA_CMD_OFFSET = 0x30,
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/* SCRs base */
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K2_SATA_SCR_STATUS_OFFSET = 0x40,
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K2_SATA_SCR_ERROR_OFFSET = 0x44,
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K2_SATA_SCR_CONTROL_OFFSET = 0x48,
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/* Others */
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K2_SATA_SICR1_OFFSET = 0x80,
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K2_SATA_SICR2_OFFSET = 0x84,
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K2_SATA_SIM_OFFSET = 0x88,
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/* Port stride */
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K2_SATA_PORT_OFFSET = 0x100,
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};
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static u8 k2_stat_check_status(struct ata_port *ap);
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static u32 k2_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
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{
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if (sc_reg > SCR_CONTROL)
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return 0xffffffffU;
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return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
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}
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static void k2_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
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u32 val)
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{
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if (sc_reg > SCR_CONTROL)
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return;
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writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
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}
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static void k2_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
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{
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struct ata_ioports *ioaddr = &ap->ioaddr;
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unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
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if (tf->ctl != ap->last_ctl) {
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writeb(tf->ctl, ioaddr->ctl_addr);
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ap->last_ctl = tf->ctl;
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ata_wait_idle(ap);
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}
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if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
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writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr);
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writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr);
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writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr);
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writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr);
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writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr);
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} else if (is_addr) {
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writew(tf->feature, ioaddr->feature_addr);
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writew(tf->nsect, ioaddr->nsect_addr);
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writew(tf->lbal, ioaddr->lbal_addr);
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writew(tf->lbam, ioaddr->lbam_addr);
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writew(tf->lbah, ioaddr->lbah_addr);
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}
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if (tf->flags & ATA_TFLAG_DEVICE)
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writeb(tf->device, ioaddr->device_addr);
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ata_wait_idle(ap);
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}
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static void k2_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
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{
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struct ata_ioports *ioaddr = &ap->ioaddr;
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u16 nsect, lbal, lbam, lbah, feature;
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tf->command = k2_stat_check_status(ap);
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tf->device = readw(ioaddr->device_addr);
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feature = readw(ioaddr->error_addr);
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nsect = readw(ioaddr->nsect_addr);
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lbal = readw(ioaddr->lbal_addr);
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lbam = readw(ioaddr->lbam_addr);
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lbah = readw(ioaddr->lbah_addr);
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tf->feature = feature;
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tf->nsect = nsect;
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tf->lbal = lbal;
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tf->lbam = lbam;
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tf->lbah = lbah;
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if (tf->flags & ATA_TFLAG_LBA48) {
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tf->hob_feature = feature >> 8;
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tf->hob_nsect = nsect >> 8;
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tf->hob_lbal = lbal >> 8;
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tf->hob_lbam = lbam >> 8;
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tf->hob_lbah = lbah >> 8;
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}
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}
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/**
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* k2_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction (MMIO)
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* @qc: Info associated with this ATA transaction.
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*
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* LOCKING:
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* spin_lock_irqsave(host_set lock)
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*/
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static void k2_bmdma_setup_mmio (struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
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u8 dmactl;
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void *mmio = (void *) ap->ioaddr.bmdma_addr;
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/* load PRD table addr. */
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mb(); /* make sure PRD table writes are visible to controller */
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writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
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/* specify data direction, triple-check start bit is clear */
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dmactl = readb(mmio + ATA_DMA_CMD);
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dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
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if (!rw)
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dmactl |= ATA_DMA_WR;
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writeb(dmactl, mmio + ATA_DMA_CMD);
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/* issue r/w command if this is not a ATA DMA command*/
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if (qc->tf.protocol != ATA_PROT_DMA)
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ap->ops->exec_command(ap, &qc->tf);
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}
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/**
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* k2_bmdma_start_mmio - Start a PCI IDE BMDMA transaction (MMIO)
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* @qc: Info associated with this ATA transaction.
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*
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* LOCKING:
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* spin_lock_irqsave(host_set lock)
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*/
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static void k2_bmdma_start_mmio (struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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void *mmio = (void *) ap->ioaddr.bmdma_addr;
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u8 dmactl;
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/* start host DMA transaction */
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dmactl = readb(mmio + ATA_DMA_CMD);
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writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
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/* There is a race condition in certain SATA controllers that can
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be seen when the r/w command is given to the controller before the
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host DMA is started. On a Read command, the controller would initiate
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the command to the drive even before it sees the DMA start. When there
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are very fast drives connected to the controller, or when the data request
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hits in the drive cache, there is the possibility that the drive returns a part
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or all of the requested data to the controller before the DMA start is issued.
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In this case, the controller would become confused as to what to do with the data.
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In the worst case when all the data is returned back to the controller, the
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controller could hang. In other cases it could return partial data returning
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in data corruption. This problem has been seen in PPC systems and can also appear
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on an system with very fast disks, where the SATA controller is sitting behind a
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number of bridges, and hence there is significant latency between the r/w command
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and the start command. */
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/* issue r/w command if the access is to ATA*/
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if (qc->tf.protocol == ATA_PROT_DMA)
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ap->ops->exec_command(ap, &qc->tf);
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}
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static u8 k2_stat_check_status(struct ata_port *ap)
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{
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return readl((void *) ap->ioaddr.status_addr);
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}
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#ifdef CONFIG_PPC_OF
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/*
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* k2_sata_proc_info
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* inout : decides on the direction of the dataflow and the meaning of the
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* variables
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* buffer: If inout==FALSE data is being written to it else read from it
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* *start: If inout==FALSE start of the valid data in the buffer
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* offset: If inout==FALSE offset from the beginning of the imaginary file
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* from which we start writing into the buffer
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* length: If inout==FALSE max number of bytes to be written into the buffer
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* else number of bytes in the buffer
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*/
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static int k2_sata_proc_info(struct Scsi_Host *shost, char *page, char **start,
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off_t offset, int count, int inout)
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{
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struct ata_port *ap;
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struct device_node *np;
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int len, index;
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/* Find the ata_port */
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ap = ata_shost_to_port(shost);
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if (ap == NULL)
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return 0;
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/* Find the OF node for the PCI device proper */
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np = pci_device_to_OF_node(to_pci_dev(ap->host_set->dev));
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if (np == NULL)
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return 0;
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/* Match it to a port node */
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index = (ap == ap->host_set->ports[0]) ? 0 : 1;
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for (np = np->child; np != NULL; np = np->sibling) {
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u32 *reg = (u32 *)get_property(np, "reg", NULL);
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if (!reg)
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continue;
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if (index == *reg)
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break;
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}
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if (np == NULL)
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return 0;
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len = sprintf(page, "devspec: %s\n", np->full_name);
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return len;
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}
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#endif /* CONFIG_PPC_OF */
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static struct scsi_host_template k2_sata_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
|
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
|
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.sg_tablesize = LIBATA_MAX_PRD,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
|
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.emulated = ATA_SHT_EMULATED,
|
||||
.use_clustering = ATA_SHT_USE_CLUSTERING,
|
||||
.proc_name = DRV_NAME,
|
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.dma_boundary = ATA_DMA_BOUNDARY,
|
||||
.slave_configure = ata_scsi_slave_config,
|
||||
.slave_destroy = ata_scsi_slave_destroy,
|
||||
#ifdef CONFIG_PPC_OF
|
||||
.proc_info = k2_sata_proc_info,
|
||||
#endif
|
||||
.bios_param = ata_std_bios_param,
|
||||
};
|
||||
|
||||
|
||||
static const struct ata_port_operations k2_sata_ops = {
|
||||
.port_disable = ata_port_disable,
|
||||
.tf_load = k2_sata_tf_load,
|
||||
.tf_read = k2_sata_tf_read,
|
||||
.check_status = k2_stat_check_status,
|
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.exec_command = ata_exec_command,
|
||||
.dev_select = ata_std_dev_select,
|
||||
.bmdma_setup = k2_bmdma_setup_mmio,
|
||||
.bmdma_start = k2_bmdma_start_mmio,
|
||||
.bmdma_stop = ata_bmdma_stop,
|
||||
.bmdma_status = ata_bmdma_status,
|
||||
.qc_prep = ata_qc_prep,
|
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.qc_issue = ata_qc_issue_prot,
|
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.data_xfer = ata_mmio_data_xfer,
|
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.freeze = ata_bmdma_freeze,
|
||||
.thaw = ata_bmdma_thaw,
|
||||
.error_handler = ata_bmdma_error_handler,
|
||||
.post_internal_cmd = ata_bmdma_post_internal_cmd,
|
||||
.irq_handler = ata_interrupt,
|
||||
.irq_clear = ata_bmdma_irq_clear,
|
||||
.scr_read = k2_sata_scr_read,
|
||||
.scr_write = k2_sata_scr_write,
|
||||
.port_start = ata_port_start,
|
||||
.port_stop = ata_port_stop,
|
||||
.host_stop = ata_pci_host_stop,
|
||||
};
|
||||
|
||||
static void k2_sata_setup_port(struct ata_ioports *port, unsigned long base)
|
||||
{
|
||||
port->cmd_addr = base + K2_SATA_TF_CMD_OFFSET;
|
||||
port->data_addr = base + K2_SATA_TF_DATA_OFFSET;
|
||||
port->feature_addr =
|
||||
port->error_addr = base + K2_SATA_TF_ERROR_OFFSET;
|
||||
port->nsect_addr = base + K2_SATA_TF_NSECT_OFFSET;
|
||||
port->lbal_addr = base + K2_SATA_TF_LBAL_OFFSET;
|
||||
port->lbam_addr = base + K2_SATA_TF_LBAM_OFFSET;
|
||||
port->lbah_addr = base + K2_SATA_TF_LBAH_OFFSET;
|
||||
port->device_addr = base + K2_SATA_TF_DEVICE_OFFSET;
|
||||
port->command_addr =
|
||||
port->status_addr = base + K2_SATA_TF_CMDSTAT_OFFSET;
|
||||
port->altstatus_addr =
|
||||
port->ctl_addr = base + K2_SATA_TF_CTL_OFFSET;
|
||||
port->bmdma_addr = base + K2_SATA_DMA_CMD_OFFSET;
|
||||
port->scr_addr = base + K2_SATA_SCR_STATUS_OFFSET;
|
||||
}
|
||||
|
||||
|
||||
static int k2_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
|
||||
{
|
||||
static int printed_version;
|
||||
struct ata_probe_ent *probe_ent = NULL;
|
||||
unsigned long base;
|
||||
void __iomem *mmio_base;
|
||||
int pci_dev_busy = 0;
|
||||
int rc;
|
||||
int i;
|
||||
|
||||
if (!printed_version++)
|
||||
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
|
||||
|
||||
/*
|
||||
* If this driver happens to only be useful on Apple's K2, then
|
||||
* we should check that here as it has a normal Serverworks ID
|
||||
*/
|
||||
rc = pci_enable_device(pdev);
|
||||
if (rc)
|
||||
return rc;
|
||||
/*
|
||||
* Check if we have resources mapped at all (second function may
|
||||
* have been disabled by firmware)
|
||||
*/
|
||||
if (pci_resource_len(pdev, 5) == 0)
|
||||
return -ENODEV;
|
||||
|
||||
/* Request PCI regions */
|
||||
rc = pci_request_regions(pdev, DRV_NAME);
|
||||
if (rc) {
|
||||
pci_dev_busy = 1;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
|
||||
if (rc)
|
||||
goto err_out_regions;
|
||||
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
|
||||
if (rc)
|
||||
goto err_out_regions;
|
||||
|
||||
probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
|
||||
if (probe_ent == NULL) {
|
||||
rc = -ENOMEM;
|
||||
goto err_out_regions;
|
||||
}
|
||||
|
||||
memset(probe_ent, 0, sizeof(*probe_ent));
|
||||
probe_ent->dev = pci_dev_to_dev(pdev);
|
||||
INIT_LIST_HEAD(&probe_ent->node);
|
||||
|
||||
mmio_base = pci_iomap(pdev, 5, 0);
|
||||
if (mmio_base == NULL) {
|
||||
rc = -ENOMEM;
|
||||
goto err_out_free_ent;
|
||||
}
|
||||
base = (unsigned long) mmio_base;
|
||||
|
||||
/* Clear a magic bit in SCR1 according to Darwin, those help
|
||||
* some funky seagate drives (though so far, those were already
|
||||
* set by the firmware on the machines I had access to)
|
||||
*/
|
||||
writel(readl(mmio_base + K2_SATA_SICR1_OFFSET) & ~0x00040000,
|
||||
mmio_base + K2_SATA_SICR1_OFFSET);
|
||||
|
||||
/* Clear SATA error & interrupts we don't use */
|
||||
writel(0xffffffff, mmio_base + K2_SATA_SCR_ERROR_OFFSET);
|
||||
writel(0x0, mmio_base + K2_SATA_SIM_OFFSET);
|
||||
|
||||
probe_ent->sht = &k2_sata_sht;
|
||||
probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
|
||||
ATA_FLAG_MMIO;
|
||||
probe_ent->port_ops = &k2_sata_ops;
|
||||
probe_ent->n_ports = 4;
|
||||
probe_ent->irq = pdev->irq;
|
||||
probe_ent->irq_flags = IRQF_SHARED;
|
||||
probe_ent->mmio_base = mmio_base;
|
||||
|
||||
/* We don't care much about the PIO/UDMA masks, but the core won't like us
|
||||
* if we don't fill these
|
||||
*/
|
||||
probe_ent->pio_mask = 0x1f;
|
||||
probe_ent->mwdma_mask = 0x7;
|
||||
probe_ent->udma_mask = 0x7f;
|
||||
|
||||
/* different controllers have different number of ports - currently 4 or 8 */
|
||||
/* All ports are on the same function. Multi-function device is no
|
||||
* longer available. This should not be seen in any system. */
|
||||
for (i = 0; i < ent->driver_data; i++)
|
||||
k2_sata_setup_port(&probe_ent->port[i], base + i * K2_SATA_PORT_OFFSET);
|
||||
|
||||
pci_set_master(pdev);
|
||||
|
||||
/* FIXME: check ata_device_add return value */
|
||||
ata_device_add(probe_ent);
|
||||
kfree(probe_ent);
|
||||
|
||||
return 0;
|
||||
|
||||
err_out_free_ent:
|
||||
kfree(probe_ent);
|
||||
err_out_regions:
|
||||
pci_release_regions(pdev);
|
||||
err_out:
|
||||
if (!pci_dev_busy)
|
||||
pci_disable_device(pdev);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* 0x240 is device ID for Apple K2 device
|
||||
* 0x241 is device ID for Serverworks Frodo4
|
||||
* 0x242 is device ID for Serverworks Frodo8
|
||||
* 0x24a is device ID for BCM5785 (aka HT1000) HT southbridge integrated SATA
|
||||
* controller
|
||||
* */
|
||||
static const struct pci_device_id k2_sata_pci_tbl[] = {
|
||||
{ 0x1166, 0x0240, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
|
||||
{ 0x1166, 0x0241, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
|
||||
{ 0x1166, 0x0242, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },
|
||||
{ 0x1166, 0x024a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
|
||||
{ 0x1166, 0x024b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
|
||||
{ }
|
||||
};
|
||||
|
||||
|
||||
static struct pci_driver k2_sata_pci_driver = {
|
||||
.name = DRV_NAME,
|
||||
.id_table = k2_sata_pci_tbl,
|
||||
.probe = k2_sata_init_one,
|
||||
.remove = ata_pci_remove_one,
|
||||
};
|
||||
|
||||
|
||||
static int __init k2_sata_init(void)
|
||||
{
|
||||
return pci_register_driver(&k2_sata_pci_driver);
|
||||
}
|
||||
|
||||
|
||||
static void __exit k2_sata_exit(void)
|
||||
{
|
||||
pci_unregister_driver(&k2_sata_pci_driver);
|
||||
}
|
||||
|
||||
|
||||
MODULE_AUTHOR("Benjamin Herrenschmidt");
|
||||
MODULE_DESCRIPTION("low-level driver for K2 SATA controller");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DEVICE_TABLE(pci, k2_sata_pci_tbl);
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
|
||||
module_init(k2_sata_init);
|
||||
module_exit(k2_sata_exit);
|
||||
Reference in New Issue
Block a user