44c10138fd
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.
This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.
In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.
Compile tested with make all{yes,mod}config on x86_64 and i386.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
175 lines
5 KiB
C
175 lines
5 KiB
C
/*
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* Cobalt Qube/Raq PCI support
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997, 2002, 2003 by Ralf Baechle
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* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/pci.h>
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#include <asm/io.h>
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#include <asm/gt64120.h>
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#include <cobalt.h>
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static void qube_raq_galileo_early_fixup(struct pci_dev *dev)
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{
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if (dev->devfn == PCI_DEVFN(0, 0) &&
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(dev->class >> 8) == PCI_CLASS_MEMORY_OTHER) {
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dev->class = (PCI_CLASS_BRIDGE_HOST << 8) | (dev->class & 0xff);
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printk(KERN_INFO "Galileo: fixed bridge class\n");
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}
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}
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DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
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qube_raq_galileo_early_fixup);
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static void qube_raq_via_bmIDE_fixup(struct pci_dev *dev)
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{
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unsigned short cfgword;
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unsigned char lt;
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/* Enable Bus Mastering and fast back to back. */
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pci_read_config_word(dev, PCI_COMMAND, &cfgword);
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cfgword |= (PCI_COMMAND_FAST_BACK | PCI_COMMAND_MASTER);
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pci_write_config_word(dev, PCI_COMMAND, cfgword);
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/* Enable both ide interfaces. ROM only enables primary one. */
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pci_write_config_byte(dev, 0x40, 0xb);
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/* Set latency timer to reasonable value. */
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pci_read_config_byte(dev, PCI_LATENCY_TIMER, <);
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if (lt < 64)
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
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pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
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qube_raq_via_bmIDE_fixup);
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static void qube_raq_galileo_fixup(struct pci_dev *dev)
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{
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if (dev->devfn != PCI_DEVFN(0, 0))
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return;
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/* Fix PCI latency-timer and cache-line-size values in Galileo
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* host bridge.
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*/
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
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pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
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/*
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* The code described by the comment below has been removed
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* as it causes bus mastering by the Ethernet controllers
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* to break under any kind of network load. We always set
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* the retry timeouts to their maximum.
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*
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* --x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--
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*
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* On all machines prior to Q2, we had the STOP line disconnected
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* from Galileo to VIA on PCI. The new Galileo does not function
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* correctly unless we have it connected.
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*
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* Therefore we must set the disconnect/retry cycle values to
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* something sensible when using the new Galileo.
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*/
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printk(KERN_INFO "Galileo: revision %u\n", dev->revision);
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#if 0
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if (dev->revision >= 0x10) {
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/* New Galileo, assumes PCI stop line to VIA is connected. */
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GT_WRITE(GT_PCI0_TOR_OFS, 0x4020);
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} else if (dev->revision == 0x1 || dev->revision == 0x2)
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#endif
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{
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signed int timeo;
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/* XXX WE MUST DO THIS ELSE GALILEO LOCKS UP! -DaveM */
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timeo = GT_READ(GT_PCI0_TOR_OFS);
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/* Old Galileo, assumes PCI STOP line to VIA is disconnected. */
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GT_WRITE(GT_PCI0_TOR_OFS,
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(0xff << 16) | /* retry count */
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(0xff << 8) | /* timeout 1 */
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0xff); /* timeout 0 */
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/* enable PCI retry exceeded interrupt */
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GT_WRITE(GT_INTRMASK_OFS, GT_INTR_RETRYCTR0_MSK | GT_READ(GT_INTRMASK_OFS));
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}
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
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qube_raq_galileo_fixup);
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int cobalt_board_id;
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static void qube_raq_via_board_id_fixup(struct pci_dev *dev)
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{
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u8 id;
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int retval;
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retval = pci_read_config_byte(dev, VIA_COBALT_BRD_ID_REG, &id);
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if (retval) {
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panic("Cannot read board ID");
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return;
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}
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cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(id);
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printk(KERN_INFO "Cobalt board ID: %d\n", cobalt_board_id);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0,
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qube_raq_via_board_id_fixup);
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static char irq_tab_qube1[] __initdata = {
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[COBALT_PCICONF_CPU] = 0,
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[COBALT_PCICONF_ETH0] = COBALT_QUBE1_ETH0_IRQ,
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[COBALT_PCICONF_RAQSCSI] = COBALT_SCSI_IRQ,
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[COBALT_PCICONF_VIA] = 0,
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[COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
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[COBALT_PCICONF_ETH1] = 0
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};
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static char irq_tab_cobalt[] __initdata = {
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[COBALT_PCICONF_CPU] = 0,
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[COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
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[COBALT_PCICONF_RAQSCSI] = COBALT_SCSI_IRQ,
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[COBALT_PCICONF_VIA] = 0,
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[COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
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[COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
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};
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static char irq_tab_raq2[] __initdata = {
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[COBALT_PCICONF_CPU] = 0,
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[COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
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[COBALT_PCICONF_RAQSCSI] = COBALT_RAQ_SCSI_IRQ,
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[COBALT_PCICONF_VIA] = 0,
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[COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
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[COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
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};
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int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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if (cobalt_board_id < COBALT_BRD_ID_QUBE2)
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return irq_tab_qube1[slot];
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if (cobalt_board_id == COBALT_BRD_ID_RAQ2)
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return irq_tab_raq2[slot];
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return irq_tab_cobalt[slot];
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}
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/* Do platform specific device initialization at pci_enable_device() time */
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int pcibios_plat_dev_init(struct pci_dev *dev)
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{
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return 0;
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}
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