/*
* 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 <asm/cobalt/cobalt.h>
extern int cobalt_board_id;
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, 7);
}
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)
{
unsigned short galileo_id;
/* 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, 7);
/*
* 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.
*/
pci_read_config_word(dev, PCI_REVISION_ID, &galileo_id);
galileo_id &= 0xff; /* mask off class info */
if (galileo_id >= 0x10) {
/* New Galileo, assumes PCI stop line to VIA is connected. */
GALILEO_OUTL(0x4020, GT_PCI0_TOR_OFS);
} else if (galileo_id == 0x1 || galileo_id == 0x2) {
signed int timeo;
/* XXX WE MUST DO THIS ELSE GALILEO LOCKS UP! -DaveM */
timeo = GALILEO_INL(GT_PCI0_TOR_OFS);
/* Old Galileo, assumes PCI STOP line to VIA is disconnected. */
GALILEO_OUTL(0xffff, GT_PCI0_TOR_OFS);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_GALILEO, PCI_ANY_ID,
qube_raq_galileo_fixup);
static char irq_tab_cobalt[] __initdata = {
[COBALT_PCICONF_CPU] = 0,
[COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
[COBALT_PCICONF_RAQSCSI] = COBALT_SCSI_IRQ,
[COBALT_PCICONF_VIA] = 0,
[COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
[COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
};
static char irq_tab_raq2[] __initdata = {
[COBALT_PCICONF_CPU] = 0,
[COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
[COBALT_PCICONF_RAQSCSI] = COBALT_RAQ_SCSI_IRQ,
[COBALT_PCICONF_VIA] = 0,
[COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
[COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
};
int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
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;
}
