forked from luck/tmp_suning_uos_patched
85a053fa5f
Fixups are executed once the pci-device is found which is during boot process so __init seems fine as long as the platform does not support hotplug. However it is possible to remove the PCI bus at run time and have it rediscovered again via "echo 1 > /sys/bus/pci/rescan" and this will call the fixups again. [ralf@linux-mips.org: Made piixirqmap[] in malta_piix_func0_fixup() __initdata.] Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
/*
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* Copyright (C) 2008 Lemote Technology
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* Copyright (C) 2004 ICT CAS
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* Author: Li xiaoyu, lixy@ict.ac.cn
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*
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* Copyright (C) 2007 Lemote, Inc.
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <loongson.h>
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#include <cs5536/cs5536.h>
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#include <cs5536/cs5536_pci.h>
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/* PCI interrupt pins
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*
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* These should not be changed, or you should consider loongson2f interrupt
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* register and your pci card dispatch
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*/
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#define PCIA 4
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#define PCIB 5
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#define PCIC 6
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#define PCID 7
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/* all the pci device has the PCIA pin, check the datasheet. */
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static char irq_tab[][5] __initdata = {
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/* INTA INTB INTC INTD */
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{0, 0, 0, 0, 0}, /* 11: Unused */
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{0, 0, 0, 0, 0}, /* 12: Unused */
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{0, 0, 0, 0, 0}, /* 13: Unused */
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{0, 0, 0, 0, 0}, /* 14: Unused */
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{0, 0, 0, 0, 0}, /* 15: Unused */
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{0, 0, 0, 0, 0}, /* 16: Unused */
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{0, PCIA, 0, 0, 0}, /* 17: RTL8110-0 */
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{0, PCIB, 0, 0, 0}, /* 18: RTL8110-1 */
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{0, PCIC, 0, 0, 0}, /* 19: SiI3114 */
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{0, PCID, 0, 0, 0}, /* 20: 3-ports nec usb */
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{0, PCIA, PCIB, PCIC, PCID}, /* 21: PCI-SLOT */
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{0, 0, 0, 0, 0}, /* 22: Unused */
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{0, 0, 0, 0, 0}, /* 23: Unused */
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{0, 0, 0, 0, 0}, /* 24: Unused */
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{0, 0, 0, 0, 0}, /* 25: Unused */
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{0, 0, 0, 0, 0}, /* 26: Unused */
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{0, 0, 0, 0, 0}, /* 27: Unused */
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};
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int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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int virq;
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if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
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&& (PCI_SLOT(dev->devfn) < 32)) {
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virq = irq_tab[slot][pin];
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printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
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virq + LOONGSON_IRQ_BASE);
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if (virq != 0)
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return LOONGSON_IRQ_BASE + virq;
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else
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return 0;
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} else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) { /* cs5536 */
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switch (PCI_FUNC(dev->devfn)) {
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case 2:
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pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
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CS5536_IDE_INTR);
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return CS5536_IDE_INTR; /* for IDE */
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case 3:
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pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
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CS5536_ACC_INTR);
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return CS5536_ACC_INTR; /* for AUDIO */
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case 4: /* for OHCI */
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case 5: /* for EHCI */
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case 6: /* for UDC */
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case 7: /* for OTG */
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pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
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CS5536_USB_INTR);
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return CS5536_USB_INTR;
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}
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return dev->irq;
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} else {
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printk(KERN_INFO " strange pci slot number.\n");
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return 0;
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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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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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/* CS5536 SPEC. fixup */
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static void __devinit loongson_cs5536_isa_fixup(struct pci_dev *pdev)
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{
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/* the uart1 and uart2 interrupt in PIC is enabled as default */
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pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
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pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
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}
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static void __devinit loongson_cs5536_ide_fixup(struct pci_dev *pdev)
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{
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/* setting the mutex pin as IDE function */
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pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
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CS5536_IDE_FLASH_SIGNATURE);
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}
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static void __devinit loongson_cs5536_acc_fixup(struct pci_dev *pdev)
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{
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/* enable the AUDIO interrupt in PIC */
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pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
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}
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static void __devinit loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
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{
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/* enable the OHCI interrupt in PIC */
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/* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
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pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
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}
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static void __devinit loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
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{
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u32 hi, lo;
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/* Serial short detect enable */
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_rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
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_wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
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/* setting the USB2.0 micro frame length */
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pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
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}
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static void __devinit loongson_nec_fixup(struct pci_dev *pdev)
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{
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unsigned int val;
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pci_read_config_dword(pdev, 0xe0, &val);
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/* Only 2 port be used */
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pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
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loongson_cs5536_isa_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
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loongson_cs5536_ohci_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
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loongson_cs5536_ehci_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
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loongson_cs5536_acc_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
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loongson_cs5536_ide_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
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loongson_nec_fixup);
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