535 lines
13 KiB
C
535 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* pata_cmd64x.c - CMD64x PATA for new ATA layer
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* (C) 2005 Red Hat Inc
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* Alan Cox <alan@lxorguk.ukuu.org.uk>
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* (C) 2009-2010 Bartlomiej Zolnierkiewicz
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* (C) 2012 MontaVista Software, LLC <source@mvista.com>
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*
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* Based upon
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* linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
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*
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* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
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* Note, this driver is not used at all on other systems because
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* there the "BIOS" has done all of the following already.
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* Due to massive hardware bugs, UltraDMA is only supported
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* on the 646U2 and not on the 646U.
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*
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* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1998 David S. Miller (davem@redhat.com)
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*
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* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
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*
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* TODO
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* Testing work
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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/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_cmd64x"
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#define DRV_VERSION "0.2.18"
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/*
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* CMD64x specific registers definition.
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*/
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enum {
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CFR = 0x50,
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CFR_INTR_CH0 = 0x04,
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CNTRL = 0x51,
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CNTRL_CH0 = 0x04,
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CNTRL_CH1 = 0x08,
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CMDTIM = 0x52,
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ARTTIM0 = 0x53,
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DRWTIM0 = 0x54,
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ARTTIM1 = 0x55,
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DRWTIM1 = 0x56,
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ARTTIM23 = 0x57,
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ARTTIM23_DIS_RA2 = 0x04,
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ARTTIM23_DIS_RA3 = 0x08,
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ARTTIM23_INTR_CH1 = 0x10,
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DRWTIM2 = 0x58,
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BRST = 0x59,
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DRWTIM3 = 0x5b,
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BMIDECR0 = 0x70,
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MRDMODE = 0x71,
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MRDMODE_INTR_CH0 = 0x04,
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MRDMODE_INTR_CH1 = 0x08,
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BMIDESR0 = 0x72,
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UDIDETCR0 = 0x73,
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DTPR0 = 0x74,
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BMIDECR1 = 0x78,
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BMIDECSR = 0x79,
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UDIDETCR1 = 0x7B,
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DTPR1 = 0x7C
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};
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static int cmd648_cable_detect(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u8 r;
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/* Check cable detect bits */
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pci_read_config_byte(pdev, BMIDECSR, &r);
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if (r & (1 << ap->port_no))
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return ATA_CBL_PATA80;
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return ATA_CBL_PATA40;
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}
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/**
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* cmd64x_set_timing - set PIO and MWDMA timing
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* @ap: ATA interface
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* @adev: ATA device
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* @mode: mode
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*
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* Called to do the PIO and MWDMA mode setup.
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*/
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static void cmd64x_set_timing(struct ata_port *ap, struct ata_device *adev, u8 mode)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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struct ata_timing t;
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const unsigned long T = 1000000 / 33;
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const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
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u8 reg;
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/* Port layout is not logical so use a table */
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const u8 arttim_port[2][2] = {
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{ ARTTIM0, ARTTIM1 },
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{ ARTTIM23, ARTTIM23 }
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};
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const u8 drwtim_port[2][2] = {
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{ DRWTIM0, DRWTIM1 },
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{ DRWTIM2, DRWTIM3 }
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};
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int arttim = arttim_port[ap->port_no][adev->devno];
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int drwtim = drwtim_port[ap->port_no][adev->devno];
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/* ata_timing_compute is smart and will produce timings for MWDMA
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that don't violate the drives PIO capabilities. */
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if (ata_timing_compute(adev, mode, &t, T, 0) < 0) {
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ata_dev_err(adev, DRV_NAME ": mode computation failed.\n");
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return;
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}
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if (ap->port_no) {
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/* Slave has shared address setup */
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struct ata_device *pair = ata_dev_pair(adev);
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if (pair) {
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struct ata_timing tp;
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ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
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ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
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}
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}
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ata_dev_dbg(adev, DRV_NAME ": active %d recovery %d setup %d.\n",
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t.active, t.recover, t.setup);
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if (t.recover > 16) {
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t.active += t.recover - 16;
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t.recover = 16;
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}
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if (t.active > 16)
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t.active = 16;
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/* Now convert the clocks into values we can actually stuff into
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the chip */
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if (t.recover == 16)
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t.recover = 0;
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else if (t.recover > 1)
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t.recover--;
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else
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t.recover = 15;
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if (t.setup > 4)
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t.setup = 0xC0;
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else
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t.setup = setup_data[t.setup];
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t.active &= 0x0F; /* 0 = 16 */
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/* Load setup timing */
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pci_read_config_byte(pdev, arttim, ®);
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reg &= 0x3F;
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reg |= t.setup;
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pci_write_config_byte(pdev, arttim, reg);
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/* Load active/recovery */
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pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
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}
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/**
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* cmd64x_set_piomode - set initial PIO mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Used when configuring the devices ot set the PIO timings. All the
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* actual work is done by the PIO/MWDMA setting helper
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*/
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static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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cmd64x_set_timing(ap, adev, adev->pio_mode);
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}
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/**
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* cmd64x_set_dmamode - set initial DMA mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Called to do the DMA mode setup.
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*/
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static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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static const u8 udma_data[] = {
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0x30, 0x20, 0x10, 0x20, 0x10, 0x00
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};
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u8 regU, regD;
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int pciU = UDIDETCR0 + 8 * ap->port_no;
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int pciD = BMIDESR0 + 8 * ap->port_no;
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int shift = 2 * adev->devno;
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pci_read_config_byte(pdev, pciD, ®D);
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pci_read_config_byte(pdev, pciU, ®U);
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/* DMA bits off */
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regD &= ~(0x20 << adev->devno);
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/* DMA control bits */
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regU &= ~(0x30 << shift);
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/* DMA timing bits */
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regU &= ~(0x05 << adev->devno);
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if (adev->dma_mode >= XFER_UDMA_0) {
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/* Merge the timing value */
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regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
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/* Merge the control bits */
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regU |= 1 << adev->devno; /* UDMA on */
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if (adev->dma_mode > XFER_UDMA_2) /* 15nS timing */
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regU |= 4 << adev->devno;
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} else {
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regU &= ~ (1 << adev->devno); /* UDMA off */
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cmd64x_set_timing(ap, adev, adev->dma_mode);
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}
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regD |= 0x20 << adev->devno;
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pci_write_config_byte(pdev, pciU, regU);
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pci_write_config_byte(pdev, pciD, regD);
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}
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/**
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* cmd64x_sff_irq_check - check IDE interrupt
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* @ap: ATA interface
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*
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* Check IDE interrupt in CFR/ARTTIM23 registers.
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*/
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static bool cmd64x_sff_irq_check(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
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int irq_reg = ap->port_no ? ARTTIM23 : CFR;
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u8 irq_stat;
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/* NOTE: reading the register should clear the interrupt */
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pci_read_config_byte(pdev, irq_reg, &irq_stat);
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return irq_stat & irq_mask;
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}
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/**
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* cmd64x_sff_irq_clear - clear IDE interrupt
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* @ap: ATA interface
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*
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* Clear IDE interrupt in CFR/ARTTIM23 and DMA status registers.
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*/
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static void cmd64x_sff_irq_clear(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int irq_reg = ap->port_no ? ARTTIM23 : CFR;
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u8 irq_stat;
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ata_bmdma_irq_clear(ap);
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/* Reading the register should be enough to clear the interrupt */
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pci_read_config_byte(pdev, irq_reg, &irq_stat);
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}
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/**
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* cmd648_sff_irq_check - check IDE interrupt
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* @ap: ATA interface
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*
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* Check IDE interrupt in MRDMODE register.
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*/
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static bool cmd648_sff_irq_check(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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unsigned long base = pci_resource_start(pdev, 4);
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int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
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u8 mrdmode = inb(base + 1);
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return mrdmode & irq_mask;
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}
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/**
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* cmd648_sff_irq_clear - clear IDE interrupt
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* @ap: ATA interface
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*
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* Clear IDE interrupt in MRDMODE and DMA status registers.
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*/
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static void cmd648_sff_irq_clear(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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unsigned long base = pci_resource_start(pdev, 4);
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int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
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u8 mrdmode;
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ata_bmdma_irq_clear(ap);
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/* Clear this port's interrupt bit (leaving the other port alone) */
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mrdmode = inb(base + 1);
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mrdmode &= ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1);
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outb(mrdmode | irq_mask, base + 1);
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}
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/**
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* cmd646r1_bmdma_stop - DMA stop callback
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* @qc: Command in progress
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*
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* Stub for now while investigating the r1 quirk in the old driver.
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*/
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static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
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{
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ata_bmdma_stop(qc);
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}
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static struct scsi_host_template cmd64x_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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static const struct ata_port_operations cmd64x_base_ops = {
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.inherits = &ata_bmdma_port_ops,
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.set_piomode = cmd64x_set_piomode,
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.set_dmamode = cmd64x_set_dmamode,
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};
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static struct ata_port_operations cmd64x_port_ops = {
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.inherits = &cmd64x_base_ops,
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.sff_irq_check = cmd64x_sff_irq_check,
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.sff_irq_clear = cmd64x_sff_irq_clear,
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.cable_detect = ata_cable_40wire,
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};
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static struct ata_port_operations cmd646r1_port_ops = {
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.inherits = &cmd64x_base_ops,
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.sff_irq_check = cmd64x_sff_irq_check,
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.sff_irq_clear = cmd64x_sff_irq_clear,
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.bmdma_stop = cmd646r1_bmdma_stop,
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.cable_detect = ata_cable_40wire,
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};
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static struct ata_port_operations cmd646r3_port_ops = {
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.inherits = &cmd64x_base_ops,
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.sff_irq_check = cmd648_sff_irq_check,
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.sff_irq_clear = cmd648_sff_irq_clear,
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.cable_detect = ata_cable_40wire,
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};
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static struct ata_port_operations cmd648_port_ops = {
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.inherits = &cmd64x_base_ops,
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.sff_irq_check = cmd648_sff_irq_check,
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.sff_irq_clear = cmd648_sff_irq_clear,
|
||
|
|
.cable_detect = cmd648_cable_detect,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void cmd64x_fixup(struct pci_dev *pdev)
|
||
|
|
{
|
||
|
|
u8 mrdmode;
|
||
|
|
|
||
|
|
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
|
||
|
|
pci_read_config_byte(pdev, MRDMODE, &mrdmode);
|
||
|
|
mrdmode &= ~0x30; /* IRQ set up */
|
||
|
|
mrdmode |= 0x02; /* Memory read line enable */
|
||
|
|
pci_write_config_byte(pdev, MRDMODE, mrdmode);
|
||
|
|
|
||
|
|
/* PPC specific fixup copied from old driver */
|
||
|
|
#ifdef CONFIG_PPC
|
||
|
|
pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
|
||
|
|
{
|
||
|
|
static const struct ata_port_info cmd_info[7] = {
|
||
|
|
{ /* CMD 643 - no UDMA */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.port_ops = &cmd64x_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 646 with broken UDMA */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.port_ops = &cmd64x_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 646U with broken UDMA */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.port_ops = &cmd646r3_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 646U2 with working UDMA */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.udma_mask = ATA_UDMA2,
|
||
|
|
.port_ops = &cmd646r3_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 646 rev 1 */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.port_ops = &cmd646r1_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 648 */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.udma_mask = ATA_UDMA4,
|
||
|
|
.port_ops = &cmd648_port_ops
|
||
|
|
},
|
||
|
|
{ /* CMD 649 */
|
||
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
||
|
|
.pio_mask = ATA_PIO4,
|
||
|
|
.mwdma_mask = ATA_MWDMA2,
|
||
|
|
.udma_mask = ATA_UDMA5,
|
||
|
|
.port_ops = &cmd648_port_ops
|
||
|
|
}
|
||
|
|
};
|
||
|
|
const struct ata_port_info *ppi[] = {
|
||
|
|
&cmd_info[id->driver_data],
|
||
|
|
&cmd_info[id->driver_data],
|
||
|
|
NULL
|
||
|
|
};
|
||
|
|
u8 reg;
|
||
|
|
int rc;
|
||
|
|
struct pci_dev *bridge = pdev->bus->self;
|
||
|
|
/* mobility split bridges don't report enabled ports correctly */
|
||
|
|
int port_ok = !(bridge && bridge->vendor ==
|
||
|
|
PCI_VENDOR_ID_MOBILITY_ELECTRONICS);
|
||
|
|
/* all (with exceptions below) apart from 643 have CNTRL_CH0 bit */
|
||
|
|
int cntrl_ch0_ok = (id->driver_data != 0);
|
||
|
|
|
||
|
|
rc = pcim_enable_device(pdev);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
if (id->driver_data == 0) /* 643 */
|
||
|
|
ata_pci_bmdma_clear_simplex(pdev);
|
||
|
|
|
||
|
|
if (pdev->device == PCI_DEVICE_ID_CMD_646)
|
||
|
|
switch (pdev->revision) {
|
||
|
|
/* UDMA works since rev 5 */
|
||
|
|
default:
|
||
|
|
ppi[0] = &cmd_info[3];
|
||
|
|
ppi[1] = &cmd_info[3];
|
||
|
|
break;
|
||
|
|
/* Interrupts in MRDMODE since rev 3 */
|
||
|
|
case 3:
|
||
|
|
case 4:
|
||
|
|
ppi[0] = &cmd_info[2];
|
||
|
|
ppi[1] = &cmd_info[2];
|
||
|
|
break;
|
||
|
|
/* Rev 1 with other problems? */
|
||
|
|
case 1:
|
||
|
|
ppi[0] = &cmd_info[4];
|
||
|
|
ppi[1] = &cmd_info[4];
|
||
|
|
fallthrough;
|
||
|
|
/* Early revs have no CNTRL_CH0 */
|
||
|
|
case 2:
|
||
|
|
case 0:
|
||
|
|
cntrl_ch0_ok = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
cmd64x_fixup(pdev);
|
||
|
|
|
||
|
|
/* check for enabled ports */
|
||
|
|
pci_read_config_byte(pdev, CNTRL, ®);
|
||
|
|
if (!port_ok)
|
||
|
|
dev_notice(&pdev->dev, "Mobility Bridge detected, ignoring CNTRL port enable/disable\n");
|
||
|
|
if (port_ok && cntrl_ch0_ok && !(reg & CNTRL_CH0)) {
|
||
|
|
dev_notice(&pdev->dev, "Primary port is disabled\n");
|
||
|
|
ppi[0] = &ata_dummy_port_info;
|
||
|
|
|
||
|
|
}
|
||
|
|
if (port_ok && !(reg & CNTRL_CH1)) {
|
||
|
|
dev_notice(&pdev->dev, "Secondary port is disabled\n");
|
||
|
|
ppi[1] = &ata_dummy_port_info;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ata_pci_bmdma_init_one(pdev, ppi, &cmd64x_sht, NULL, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
static int cmd64x_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;
|
||
|
|
|
||
|
|
cmd64x_fixup(pdev);
|
||
|
|
|
||
|
|
ata_host_resume(host);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static const struct pci_device_id cmd64x[] = {
|
||
|
|
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
|
||
|
|
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
|
||
|
|
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 5 },
|
||
|
|
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 6 },
|
||
|
|
|
||
|
|
{ },
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct pci_driver cmd64x_pci_driver = {
|
||
|
|
.name = DRV_NAME,
|
||
|
|
.id_table = cmd64x,
|
||
|
|
.probe = cmd64x_init_one,
|
||
|
|
.remove = ata_pci_remove_one,
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
.suspend = ata_pci_device_suspend,
|
||
|
|
.resume = cmd64x_reinit_one,
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
module_pci_driver(cmd64x_pci_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Alan Cox");
|
||
|
|
MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_DEVICE_TABLE(pci, cmd64x);
|
||
|
|
MODULE_VERSION(DRV_VERSION);
|