/* * Copyright (C) 2004 ICT CAS * Author: Li xiaoyu, ICT CAS * lixy@ict.ac.cn * * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology * Author: Fuxin Zhang, zhangfx@lemote.com * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/init.h> #include <linux/pci.h> #include <loongson.h> /* South bridge slot number is set by the pci probe process */ static u8 sb_slot = 5; int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { int irq = 0; if (slot == sb_slot) { switch (PCI_FUNC(dev->devfn)) { case 2: irq = 10; break; case 3: irq = 11; break; case 5: irq = 9; break; } } else { irq = LOONGSON_IRQ_BASE + 25 + pin; } return irq; } /* Do platform specific device initialization at pci_enable_device() time */ int pcibios_plat_dev_init(struct pci_dev *dev) { return 0; } static void __devinit loongson2e_nec_fixup(struct pci_dev *pdev) { unsigned int val; /* Configures port 1, 2, 3, 4 to be validate*/ pci_read_config_dword(pdev, 0xe0, &val); pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x4); /* System clock is 48-MHz Oscillator. */ pci_write_config_dword(pdev, 0xe4, 1 << 5); } static void __devinit loongson2e_686b_func0_fixup(struct pci_dev *pdev) { unsigned char c; sb_slot = PCI_SLOT(pdev->devfn); printk(KERN_INFO "via686b fix: ISA bridge\n"); /* Enable I/O Recovery time */ pci_write_config_byte(pdev, 0x40, 0x08); /* Enable ISA refresh */ pci_write_config_byte(pdev, 0x41, 0x01); /* disable ISA line buffer */ pci_write_config_byte(pdev, 0x45, 0x00); /* Gate INTR, and flush line buffer */ pci_write_config_byte(pdev, 0x46, 0xe0); /* Disable PCI Delay Transaction, Enable EISA ports 4D0/4D1. */ /* pci_write_config_byte(pdev, 0x47, 0x20); */ /* * enable PCI Delay Transaction, Enable EISA ports 4D0/4D1. * enable time-out timer */ pci_write_config_byte(pdev, 0x47, 0xe6); /* * enable level trigger on pci irqs: 9,10,11,13 * important! without this PCI interrupts won't work */ outb(0x2e, 0x4d1); /* 512 K PCI Decode */ pci_write_config_byte(pdev, 0x48, 0x01); /* Wait for PGNT before grant to ISA Master/DMA */ pci_write_config_byte(pdev, 0x4a, 0x84); /* * Plug'n'Play * * Parallel DRQ 3, Floppy DRQ 2 (default) */ pci_write_config_byte(pdev, 0x50, 0x0e); /* * IRQ Routing for Floppy and Parallel port * * IRQ 6 for floppy, IRQ 7 for parallel port */ pci_write_config_byte(pdev, 0x51, 0x76); /* IRQ Routing for serial ports (take IRQ 3 and 4) */ pci_write_config_byte(pdev, 0x52, 0x34); /* All IRQ's level triggered. */ pci_write_config_byte(pdev, 0x54, 0x00); /* route PIRQA-D irq */ pci_write_config_byte(pdev, 0x55, 0x90); /* bit 7-4, PIRQA */ pci_write_config_byte(pdev, 0x56, 0xba); /* bit 7-4, PIRQC; */ /* 3-0, PIRQB */ pci_write_config_byte(pdev, 0x57, 0xd0); /* bit 7-4, PIRQD */ /* enable function 5/6, audio/modem */ pci_read_config_byte(pdev, 0x85, &c); c &= ~(0x3 << 2); pci_write_config_byte(pdev, 0x85, c); printk(KERN_INFO"via686b fix: ISA bridge done\n"); } static void __devinit loongson2e_686b_func1_fixup(struct pci_dev *pdev) { printk(KERN_INFO"via686b fix: IDE\n"); /* Modify IDE controller setup */ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 48); pci_write_config_byte(pdev, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); pci_write_config_byte(pdev, 0x40, 0x0b); /* legacy mode */ pci_write_config_byte(pdev, 0x42, 0x09); #if 1/* play safe, otherwise we may see notebook's usb keyboard lockup */ /* disable read prefetch/write post buffers */ pci_write_config_byte(pdev, 0x41, 0x02); /* use 3/4 as fifo thresh hold */ pci_write_config_byte(pdev, 0x43, 0x0a); pci_write_config_byte(pdev, 0x44, 0x00); pci_write_config_byte(pdev, 0x45, 0x00); #else pci_write_config_byte(pdev, 0x41, 0xc2); pci_write_config_byte(pdev, 0x43, 0x35); pci_write_config_byte(pdev, 0x44, 0x1c); pci_write_config_byte(pdev, 0x45, 0x10); #endif printk(KERN_INFO"via686b fix: IDE done\n"); } static void __devinit loongson2e_686b_func2_fixup(struct pci_dev *pdev) { /* irq routing */ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10); } static void __devinit loongson2e_686b_func3_fixup(struct pci_dev *pdev) { /* irq routing */ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11); } static void __devinit loongson2e_686b_func5_fixup(struct pci_dev *pdev) { unsigned int val; unsigned char c; /* enable IO */ pci_write_config_byte(pdev, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); pci_read_config_dword(pdev, 0x4, &val); pci_write_config_dword(pdev, 0x4, val | 1); /* route ac97 IRQ */ pci_write_config_byte(pdev, 0x3c, 9); pci_read_config_byte(pdev, 0x8, &c); /* link control: enable link & SGD PCM output */ pci_write_config_byte(pdev, 0x41, 0xcc); /* disable game port, FM, midi, sb, enable write to reg2c-2f */ pci_write_config_byte(pdev, 0x42, 0x20); /* we are using Avance logic codec */ pci_write_config_word(pdev, 0x2c, 0x1005); pci_write_config_word(pdev, 0x2e, 0x4710); pci_read_config_dword(pdev, 0x2c, &val); pci_write_config_byte(pdev, 0x42, 0x0); } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, loongson2e_686b_func0_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, loongson2e_686b_func1_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, loongson2e_686b_func2_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, loongson2e_686b_func3_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, loongson2e_686b_func5_fixup); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, loongson2e_nec_fixup);