diff options
Diffstat (limited to 'arch/mips/pci/fixup-cobalt.c')
| -rw-r--r-- | arch/mips/pci/fixup-cobalt.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/arch/mips/pci/fixup-cobalt.c b/arch/mips/pci/fixup-cobalt.c new file mode 100644 index 00000000000..57e1ca2116b --- /dev/null +++ b/arch/mips/pci/fixup-cobalt.c @@ -0,0 +1,112 @@ +/* + * 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; +} |