mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* Toshiba rbtx4938 pci routines
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* Copyright (C) 2000-2001 Toshiba Corporation
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*
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* 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is
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* licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*
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* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
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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/tx4938/rbtx4938.h>
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extern struct pci_controller tx4938_pci_controller[];
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int pci_get_irq(struct pci_dev *dev, int pin)
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{
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int irq = pin;
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u8 slot = PCI_SLOT(dev->devfn);
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struct pci_controller *controller = (struct pci_controller *)dev->sysdata;
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if (controller == &tx4938_pci_controller[1]) {
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/* TX4938 PCIC1 */
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switch (slot) {
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case TX4938_PCIC_IDSEL_AD_TO_SLOT(31):
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if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH0_SEL)
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return RBTX4938_IRQ_IRC + TX4938_IR_ETH0;
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break;
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case TX4938_PCIC_IDSEL_AD_TO_SLOT(30):
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if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH1_SEL)
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return RBTX4938_IRQ_IRC + TX4938_IR_ETH1;
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break;
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}
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return 0;
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}
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/* IRQ rotation */
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irq--; /* 0-3 */
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if (dev->bus->parent == NULL &&
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(slot == TX4938_PCIC_IDSEL_AD_TO_SLOT(23))) {
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/* PCI CardSlot (IDSEL=A23) */
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/* PCIA => PCIA (IDSEL=A23) */
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irq = (irq + 0 + slot) % 4;
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} else {
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/* PCI Backplane */
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irq = (irq + 33 - slot) % 4;
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}
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irq++; /* 1-4 */
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switch (irq) {
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case 1:
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irq = RBTX4938_IRQ_IOC_PCIA;
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break;
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case 2:
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irq = RBTX4938_IRQ_IOC_PCIB;
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break;
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case 3:
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irq = RBTX4938_IRQ_IOC_PCIC;
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break;
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case 4:
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irq = RBTX4938_IRQ_IOC_PCID;
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break;
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}
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return irq;
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}
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int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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unsigned char irq = 0;
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irq = pci_get_irq(dev, pin);
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printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n",
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dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn),
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PCI_FUNC(dev->devfn), irq);
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return irq;
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}
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/*
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* Do platform specific device initialization at pci_enable_device() time
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*/
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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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