/*
* 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) 2005-2007 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
#include "pci-common.h"
typeof(pcibios_map_irq) *octeon_pcibios_map_irq;
enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
/**
* Map a PCI device to the appropriate interrupt line
*
* @param dev The Linux PCI device structure for the device to map
* @param slot The slot number for this device on __BUS 0__. Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to.
* @param pin The PCI interrupt pin read from the device, then swizzled
* as it goes through each bridge.
* @return Interrupt number for the device
*/
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
if (octeon_pcibios_map_irq)
return octeon_pcibios_map_irq(dev, slot, pin);
else
panic("octeon_pcibios_map_irq doesn't point to a "
"pcibios_map_irq() function");
}
/**
* Called to perform platform specific PCI setup
*
* @param dev
* @return
*/
int pcibios_plat_dev_init(struct pci_dev *dev)
{
uint16_t config;
uint32_t dconfig;
int pos;
/*
* Force the Cache line setting to 64 bytes. The standard
* Linux bus scan doesn't seem to set it. Octeon really has
* 128 byte lines, but Intel bridges get really upset if you
* try and set values above 64 bytes. Value is specified in
* 32bit words.
*/
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4);
/* Set latency timers for all devices */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 48);
/* Enable reporting System errors and parity errors on all devices */
/* Enable parity checking and error reporting */
pci_read_config_word(dev, PCI_COMMAND, &config);
config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
pci_write_config_word(dev, PCI_COMMAND, config);
if (dev->subordinate) {
/* Set latency timers on sub bridges */
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 48);
/* More bridge error detection */
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
}
/* Enable the PCIe normal error reporting */
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pos) {
/* Update Device Control */
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
/* Correctable Error Reporting */
config |= PCI_EXP_DEVCTL_CERE;
/* Non-Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_NFERE;
/* Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_FERE;
/* Unsupported Request */
config |= PCI_EXP_DEVCTL_URRE;
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
}
/* Find the Advanced Error Reporting capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (pos) {
/* Clear Uncorrectable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
dconfig);
/* Enable reporting of all uncorrectable errors */
/* Uncorrectable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0);
/*
* Leave severity at HW default. This only controls if
* errors are reported as uncorrectable or
* correctable, not if the error is reported.
*/
/* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
/* Clear Correctable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
/* Enable reporting of all correctable errors */
/* Correctable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0);
/* Advanced Error Capabilities */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
/* ECRC Generation Enable */
if (config & PCI_ERR_CAP_ECRC_GENC)
config |= PCI_ERR_CAP_ECRC_GENE;
/* ECRC Check Enable */
if (config & PCI_ERR_CAP_ECRC_CHKC)
config |= PCI_ERR_CAP_ECRC_CHKE;
pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
/* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
/* Report all errors to the root complex */
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
PCI_ERR_ROOT_CMD_COR_EN |
PCI_ERR_ROOT_CMD_NONFATAL_EN |
PCI_ERR_ROOT_CMD_FATAL_EN);
/* Clear the Root status register */
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
}
return 0;
}
