16ea0fc98d
This allows parallel scan and the like to be set without having to stop using the existing full helper functions. This patch merely adds the argument and fixes up the callers. It doesn't undo the special cases already in the tree or add any new parallel callers. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
435 lines
10 KiB
C
435 lines
10 KiB
C
/*
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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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*
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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/init.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 "0.2.5"
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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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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_piomode - 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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printk(KERN_ERR 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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if (pair->dma_mode) {
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ata_timing_compute(pair, pair->dma_mode,
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&tp, T, 0);
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ata_timing_merge(&tp, &t, &t, ATA_TIMING_SETUP);
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}
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}
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}
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printk(KERN_DEBUG 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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* cmd648_dma_stop - DMA stop callback
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* @qc: Command in progress
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*
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* DMA has completed.
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*/
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static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u8 dma_intr;
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int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
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int dma_reg = ap->port_no ? ARTTIM23 : CFR;
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ata_bmdma_stop(qc);
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pci_read_config_byte(pdev, dma_reg, &dma_intr);
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pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
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}
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/**
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* cmd646r1_dma_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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.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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.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 cmd648_port_ops = {
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.inherits = &cmd64x_base_ops,
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.bmdma_stop = cmd648_bmdma_stop,
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.cable_detect = cmd648_cable_detect,
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};
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static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static const struct ata_port_info cmd_info[6] = {
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{ /* CMD 643 - no UDMA */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.port_ops = &cmd64x_port_ops
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},
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{ /* CMD 646 with broken UDMA */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.port_ops = &cmd64x_port_ops
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},
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{ /* CMD 646 with working UDMA */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA2,
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.port_ops = &cmd64x_port_ops
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},
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{ /* CMD 646 rev 1 */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.port_ops = &cmd646r1_port_ops
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},
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{ /* CMD 648 */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA4,
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.port_ops = &cmd648_port_ops
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},
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{ /* CMD 649 */
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA5,
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.port_ops = &cmd648_port_ops
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}
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};
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const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
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u8 mrdmode;
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int rc;
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rc = pcim_enable_device(pdev);
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if (rc)
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return rc;
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if (id->driver_data == 0) /* 643 */
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ata_pci_bmdma_clear_simplex(pdev);
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if (pdev->device == PCI_DEVICE_ID_CMD_646) {
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/* Does UDMA work ? */
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if (pdev->revision > 4)
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ppi[0] = &cmd_info[2];
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/* Early rev with other problems ? */
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else if (pdev->revision == 1)
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ppi[0] = &cmd_info[3];
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}
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
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pci_read_config_byte(pdev, MRDMODE, &mrdmode);
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mrdmode &= ~ 0x30; /* IRQ set up */
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mrdmode |= 0x02; /* Memory read line enable */
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pci_write_config_byte(pdev, MRDMODE, mrdmode);
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/* Force PIO 0 here.. */
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/* PPC specific fixup copied from old driver */
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#ifdef CONFIG_PPC
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pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
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#endif
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return ata_pci_sff_init_one(pdev, ppi, &cmd64x_sht, NULL, 0);
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}
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#ifdef CONFIG_PM
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static int cmd64x_reinit_one(struct pci_dev *pdev)
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{
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struct ata_host *host = dev_get_drvdata(&pdev->dev);
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u8 mrdmode;
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int rc;
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rc = ata_pci_device_do_resume(pdev);
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if (rc)
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return rc;
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
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pci_read_config_byte(pdev, MRDMODE, &mrdmode);
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mrdmode &= ~ 0x30; /* IRQ set up */
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mrdmode |= 0x02; /* Memory read line enable */
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pci_write_config_byte(pdev, MRDMODE, mrdmode);
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#ifdef CONFIG_PPC
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pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
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#endif
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ata_host_resume(host);
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return 0;
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}
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#endif
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static const struct pci_device_id cmd64x[] = {
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{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
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{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
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{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
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{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
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{ },
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};
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static struct pci_driver cmd64x_pci_driver = {
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.name = DRV_NAME,
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.id_table = cmd64x,
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.probe = cmd64x_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = cmd64x_reinit_one,
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#endif
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};
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static int __init cmd64x_init(void)
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{
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return pci_register_driver(&cmd64x_pci_driver);
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}
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static void __exit cmd64x_exit(void)
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{
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pci_unregister_driver(&cmd64x_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, cmd64x);
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MODULE_VERSION(DRV_VERSION);
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module_init(cmd64x_init);
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module_exit(cmd64x_exit);
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