// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2008 Lemote Technology * Copyright (C) 2004 ICT CAS * Author: Li xiaoyu, lixy@ict.ac.cn * * Copyright (C) 2007 Lemote, Inc. * Author: Fuxin Zhang, zhangfx@lemote.com */ #include <linux/init.h> #include <linux/pci.h> #include <loongson.h> #include <cs5536/cs5536.h> #include <cs5536/cs5536_pci.h> /* PCI interrupt pins * * These should not be changed, or you should consider loongson2f interrupt * register and your pci card dispatch */ #define PCIA 4 #define PCIB 5 #define PCIC 6 #define PCID 7 /* all the pci device has the PCIA pin, check the datasheet. */ static char irq_tab[][5] = { /* INTA INTB INTC INTD */ {0, 0, 0, 0, 0}, /* 11: Unused */ {0, 0, 0, 0, 0}, /* 12: Unused */ {0, 0, 0, 0, 0}, /* 13: Unused */ {0, 0, 0, 0, 0}, /* 14: Unused */ {0, 0, 0, 0, 0}, /* 15: Unused */ {0, 0, 0, 0, 0}, /* 16: Unused */ {0, PCIA, 0, 0, 0}, /* 17: RTL8110-0 */ {0, PCIB, 0, 0, 0}, /* 18: RTL8110-1 */ {0, PCIC, 0, 0, 0}, /* 19: SiI3114 */ {0, PCID, 0, 0, 0}, /* 20: 3-ports nec usb */ {0, PCIA, PCIB, PCIC, PCID}, /* 21: PCI-SLOT */ {0, 0, 0, 0, 0}, /* 22: Unused */ {0, 0, 0, 0, 0}, /* 23: Unused */ {0, 0, 0, 0, 0}, /* 24: Unused */ {0, 0, 0, 0, 0}, /* 25: Unused */ {0, 0, 0, 0, 0}, /* 26: Unused */ {0, 0, 0, 0, 0}, /* 27: Unused */ }; int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { int virq; if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536) && (PCI_SLOT(dev->devfn) < 32)) { virq = irq_tab[slot][pin]; printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin, virq + LOONGSON_IRQ_BASE); if (virq != 0) return LOONGSON_IRQ_BASE + virq; else return 0; } else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) { /* cs5536 */ switch (PCI_FUNC(dev->devfn)) { case 2: pci_write_config_byte(dev, PCI_INTERRUPT_LINE, CS5536_IDE_INTR); return CS5536_IDE_INTR; /* for IDE */ case 3: pci_write_config_byte(dev, PCI_INTERRUPT_LINE, CS5536_ACC_INTR); return CS5536_ACC_INTR; /* for AUDIO */ case 4: /* for OHCI */ case 5: /* for EHCI */ case 6: /* for UDC */ case 7: /* for OTG */ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, CS5536_USB_INTR); return CS5536_USB_INTR; } return dev->irq; } else { printk(KERN_INFO "strange PCI slot number.\n"); return 0; } } /* Do platform specific device initialization at pci_enable_device() time */ int pcibios_plat_dev_init(struct pci_dev *dev) { return 0; } /* CS5536 SPEC. fixup */ static void loongson_cs5536_isa_fixup(struct pci_dev *pdev) { /* the uart1 and uart2 interrupt in PIC is enabled as default */ pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1); pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1); } static void loongson_cs5536_ide_fixup(struct pci_dev *pdev) { /* setting the mutex pin as IDE function */ pci_write_config_dword(pdev, PCI_IDE_CFG_REG, CS5536_IDE_FLASH_SIGNATURE); } static void loongson_cs5536_acc_fixup(struct pci_dev *pdev) { /* enable the AUDIO interrupt in PIC */ pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1); pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0); } static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev) { /* enable the OHCI interrupt in PIC */ /* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */ pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1); } static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev) { u32 hi, lo; /* Serial short detect enable */ _rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo); _wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo); /* setting the USB2.0 micro frame length */ pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000); } static void loongson_nec_fixup(struct pci_dev *pdev) { unsigned int val; pci_read_config_dword(pdev, 0xe0, &val); /* Only 2 port be used */ pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2); } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, loongson_cs5536_isa_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC, loongson_cs5536_ohci_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC, loongson_cs5536_ehci_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO, loongson_cs5536_acc_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE, loongson_cs5536_ide_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, loongson_nec_fixup);