diff options
Diffstat (limited to 'arch/mips/pci/fixup-fuloong2e.c')
| -rw-r--r-- | arch/mips/pci/fixup-fuloong2e.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/arch/mips/pci/fixup-fuloong2e.c b/arch/mips/pci/fixup-fuloong2e.c new file mode 100644 index 0000000000..91aa923234 --- /dev/null +++ b/arch/mips/pci/fixup-fuloong2e.c @@ -0,0 +1,221 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + */ +#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 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 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 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 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 loongson2e_686b_func2_fixup(struct pci_dev *pdev) +{ + /* irq routing */ + pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10); +} + +static void loongson2e_686b_func3_fixup(struct pci_dev *pdev) +{ + /* irq routing */ + pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11); +} + +static void 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); |