255 lines
7.6 KiB
C
255 lines
7.6 KiB
C
/*
|
|
* Cobalt Qube/Raq PCI support
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1995, 1996, 1997, 2002, 2003 by Ralf Baechle
|
|
* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/pci.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gt64120.h>
|
|
|
|
#include <cobalt.h>
|
|
#include <irq.h>
|
|
|
|
/*
|
|
* PCI slot numbers
|
|
*/
|
|
#define COBALT_PCICONF_CPU 0x06
|
|
#define COBALT_PCICONF_ETH0 0x07
|
|
#define COBALT_PCICONF_RAQSCSI 0x08
|
|
#define COBALT_PCICONF_VIA 0x09
|
|
#define COBALT_PCICONF_PCISLOT 0x0A
|
|
#define COBALT_PCICONF_ETH1 0x0C
|
|
|
|
/*
|
|
* The Cobalt board ID information. The boards have an ID number wired
|
|
* into the VIA that is available in the high nibble of register 94.
|
|
*/
|
|
#define VIA_COBALT_BRD_ID_REG 0x94
|
|
#define VIA_COBALT_BRD_REG_to_ID(reg) ((unsigned char)(reg) >> 4)
|
|
|
|
static void qube_raq_galileo_early_fixup(struct pci_dev *dev)
|
|
{
|
|
if (dev->devfn == PCI_DEVFN(0, 0) &&
|
|
(dev->class >> 8) == PCI_CLASS_MEMORY_OTHER) {
|
|
|
|
dev->class = (PCI_CLASS_BRIDGE_HOST << 8) | (dev->class & 0xff);
|
|
|
|
printk(KERN_INFO "Galileo: fixed bridge class\n");
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
|
|
qube_raq_galileo_early_fixup);
|
|
|
|
static void __devinit cobalt_legacy_ide_resource_fixup(struct pci_dev *dev,
|
|
struct resource *res)
|
|
{
|
|
struct pci_controller *hose = (struct pci_controller *)dev->sysdata;
|
|
unsigned long offset = hose->io_offset;
|
|
struct resource orig = *res;
|
|
|
|
if (!(res->flags & IORESOURCE_IO) ||
|
|
!(res->flags & IORESOURCE_PCI_FIXED))
|
|
return;
|
|
|
|
res->start -= offset;
|
|
res->end -= offset;
|
|
dev_printk(KERN_DEBUG, &dev->dev, "converted legacy %pR to bus %pR\n",
|
|
&orig, res);
|
|
}
|
|
|
|
static void __devinit cobalt_legacy_ide_fixup(struct pci_dev *dev)
|
|
{
|
|
u32 class;
|
|
u8 progif;
|
|
|
|
/*
|
|
* If the IDE controller is in legacy mode, pci_setup_device() fills in
|
|
* the resources with the legacy addresses that normally appear on the
|
|
* PCI bus, just as if we had read them from a BAR.
|
|
*
|
|
* However, with the GT-64111, those legacy addresses, e.g., 0x1f0,
|
|
* will never appear on the PCI bus because it converts memory accesses
|
|
* in the PCI I/O region (which is never at address zero) into I/O port
|
|
* accesses with no address translation.
|
|
*
|
|
* For example, if GT_DEF_PCI0_IO_BASE is 0x10000000, a load or store
|
|
* to physical address 0x100001f0 will become a PCI access to I/O port
|
|
* 0x100001f0. There's no way to generate an access to I/O port 0x1f0,
|
|
* but the VT82C586 IDE controller does respond at 0x100001f0 because
|
|
* it only decodes the low 24 bits of the address.
|
|
*
|
|
* When this quirk runs, the pci_dev resources should contain bus
|
|
* addresses, not Linux I/O port numbers, so convert legacy addresses
|
|
* like 0x1f0 to bus addresses like 0x100001f0. Later, we'll convert
|
|
* them back with pcibios_fixup_bus() or pcibios_bus_to_resource().
|
|
*/
|
|
class = dev->class >> 8;
|
|
if (class != PCI_CLASS_STORAGE_IDE)
|
|
return;
|
|
|
|
pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
|
|
if ((progif & 1) == 0) {
|
|
cobalt_legacy_ide_resource_fixup(dev, &dev->resource[0]);
|
|
cobalt_legacy_ide_resource_fixup(dev, &dev->resource[1]);
|
|
}
|
|
if ((progif & 4) == 0) {
|
|
cobalt_legacy_ide_resource_fixup(dev, &dev->resource[2]);
|
|
cobalt_legacy_ide_resource_fixup(dev, &dev->resource[3]);
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
|
|
cobalt_legacy_ide_fixup);
|
|
|
|
static void qube_raq_via_bmIDE_fixup(struct pci_dev *dev)
|
|
{
|
|
unsigned short cfgword;
|
|
unsigned char lt;
|
|
|
|
/* Enable Bus Mastering and fast back to back. */
|
|
pci_read_config_word(dev, PCI_COMMAND, &cfgword);
|
|
cfgword |= (PCI_COMMAND_FAST_BACK | PCI_COMMAND_MASTER);
|
|
pci_write_config_word(dev, PCI_COMMAND, cfgword);
|
|
|
|
/* Enable both ide interfaces. ROM only enables primary one. */
|
|
pci_write_config_byte(dev, 0x40, 0xb);
|
|
|
|
/* Set latency timer to reasonable value. */
|
|
pci_read_config_byte(dev, PCI_LATENCY_TIMER, <);
|
|
if (lt < 64)
|
|
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
|
|
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
|
|
qube_raq_via_bmIDE_fixup);
|
|
|
|
static void qube_raq_galileo_fixup(struct pci_dev *dev)
|
|
{
|
|
if (dev->devfn != PCI_DEVFN(0, 0))
|
|
return;
|
|
|
|
/* Fix PCI latency-timer and cache-line-size values in Galileo
|
|
* host bridge.
|
|
*/
|
|
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
|
|
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
|
|
|
|
/*
|
|
* The code described by the comment below has been removed
|
|
* as it causes bus mastering by the Ethernet controllers
|
|
* to break under any kind of network load. We always set
|
|
* the retry timeouts to their maximum.
|
|
*
|
|
* --x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--
|
|
*
|
|
* On all machines prior to Q2, we had the STOP line disconnected
|
|
* from Galileo to VIA on PCI. The new Galileo does not function
|
|
* correctly unless we have it connected.
|
|
*
|
|
* Therefore we must set the disconnect/retry cycle values to
|
|
* something sensible when using the new Galileo.
|
|
*/
|
|
|
|
printk(KERN_INFO "Galileo: revision %u\n", dev->revision);
|
|
|
|
#if 0
|
|
if (dev->revision >= 0x10) {
|
|
/* New Galileo, assumes PCI stop line to VIA is connected. */
|
|
GT_WRITE(GT_PCI0_TOR_OFS, 0x4020);
|
|
} else if (dev->revision == 0x1 || dev->revision == 0x2)
|
|
#endif
|
|
{
|
|
signed int timeo;
|
|
/* XXX WE MUST DO THIS ELSE GALILEO LOCKS UP! -DaveM */
|
|
timeo = GT_READ(GT_PCI0_TOR_OFS);
|
|
/* Old Galileo, assumes PCI STOP line to VIA is disconnected. */
|
|
GT_WRITE(GT_PCI0_TOR_OFS,
|
|
(0xff << 16) | /* retry count */
|
|
(0xff << 8) | /* timeout 1 */
|
|
0xff); /* timeout 0 */
|
|
|
|
/* enable PCI retry exceeded interrupt */
|
|
GT_WRITE(GT_INTRMASK_OFS, GT_INTR_RETRYCTR0_MSK | GT_READ(GT_INTRMASK_OFS));
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
|
|
qube_raq_galileo_fixup);
|
|
|
|
int cobalt_board_id;
|
|
|
|
static void qube_raq_via_board_id_fixup(struct pci_dev *dev)
|
|
{
|
|
u8 id;
|
|
int retval;
|
|
|
|
retval = pci_read_config_byte(dev, VIA_COBALT_BRD_ID_REG, &id);
|
|
if (retval) {
|
|
panic("Cannot read board ID");
|
|
return;
|
|
}
|
|
|
|
cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(id);
|
|
|
|
printk(KERN_INFO "Cobalt board ID: %d\n", cobalt_board_id);
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0,
|
|
qube_raq_via_board_id_fixup);
|
|
|
|
static char irq_tab_qube1[] __initdata = {
|
|
[COBALT_PCICONF_CPU] = 0,
|
|
[COBALT_PCICONF_ETH0] = QUBE1_ETH0_IRQ,
|
|
[COBALT_PCICONF_RAQSCSI] = SCSI_IRQ,
|
|
[COBALT_PCICONF_VIA] = 0,
|
|
[COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
|
|
[COBALT_PCICONF_ETH1] = 0
|
|
};
|
|
|
|
static char irq_tab_cobalt[] __initdata = {
|
|
[COBALT_PCICONF_CPU] = 0,
|
|
[COBALT_PCICONF_ETH0] = ETH0_IRQ,
|
|
[COBALT_PCICONF_RAQSCSI] = SCSI_IRQ,
|
|
[COBALT_PCICONF_VIA] = 0,
|
|
[COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
|
|
[COBALT_PCICONF_ETH1] = ETH1_IRQ
|
|
};
|
|
|
|
static char irq_tab_raq2[] __initdata = {
|
|
[COBALT_PCICONF_CPU] = 0,
|
|
[COBALT_PCICONF_ETH0] = ETH0_IRQ,
|
|
[COBALT_PCICONF_RAQSCSI] = RAQ2_SCSI_IRQ,
|
|
[COBALT_PCICONF_VIA] = 0,
|
|
[COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
|
|
[COBALT_PCICONF_ETH1] = ETH1_IRQ
|
|
};
|
|
|
|
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
if (cobalt_board_id <= COBALT_BRD_ID_QUBE1)
|
|
return irq_tab_qube1[slot];
|
|
|
|
if (cobalt_board_id == COBALT_BRD_ID_RAQ2)
|
|
return irq_tab_raq2[slot];
|
|
|
|
return irq_tab_cobalt[slot];
|
|
}
|
|
|
|
/* Do platform specific device initialization at pci_enable_device() time */
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|