136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
#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/slab.h>
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#include <linux/version.h>
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#include <asm/pci.h>
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#include <asm/io.h>
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#include <linux/init.h>
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#include <linux/mod_devicetable.h>
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#include <asm/mach-ralink/rt288x.h>
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#include <asm/mach-ralink/rt288x_pci.h>
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#ifdef CONFIG_PCI
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extern int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
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extern int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
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struct pci_ops rt2880_pci_ops = {
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.read = pci_config_read,
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.write = pci_config_write,
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};
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static struct resource pci_io_resource = {
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.name = "pci MEM space",
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.start = 0x20000000,
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.end = 0x2FFFFFFF,
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.flags = IORESOURCE_MEM,
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};
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static struct resource pci_mem_resource = {
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.name = "pci IO space",
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.start = 0x00460000,
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.end = 0x0046FFFF,
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.flags = IORESOURCE_IO,
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};
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struct pci_controller rt2880_controller = {
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.pci_ops = &rt2880_pci_ops,
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.mem_resource = &pci_io_resource,
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.io_resource = &pci_mem_resource,
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.mem_offset = 0x00000000UL,
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.io_offset = 0x00000000UL,
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};
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void inline
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read_config(unsigned long bus, unsigned long dev, unsigned long func,
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unsigned long reg, unsigned long *val)
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{
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unsigned long address =
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(bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000;
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writel(address, RT2880_PCI_CONFIG_ADDR);
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*val = readl(RT2880_PCI_CONFIG_DATA);
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}
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void inline
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write_config(unsigned long bus, unsigned long dev, unsigned long func,
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unsigned long reg, unsigned long val)
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{
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unsigned long address =
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(bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000;
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writel(address, RT2880_PCI_CONFIG_ADDR);
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writel(val, RT2880_PCI_CONFIG_DATA);
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}
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int __init
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pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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u16 cmd;
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unsigned long val;
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int irq = -1;
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if (dev->bus->number != 0)
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return 0;
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switch(PCI_SLOT(dev->devfn))
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{
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case 0x00:
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write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000);
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read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val);
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break;
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case 0x11:
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irq = RT288X_CPU_IRQ_PCI;
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break;
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default:
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printk("%s:%s[%d] trying to alloc unknown pci irq\n", __FILE__, __func__, __LINE__);
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BUG();
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break;
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}
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pci_write_config_byte((struct pci_dev*)dev, PCI_CACHE_LINE_SIZE, 0x14);
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pci_write_config_byte((struct pci_dev*)dev, PCI_LATENCY_TIMER, 0xFF);
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pci_read_config_word((struct pci_dev*)dev, PCI_COMMAND, &cmd);
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cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
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PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK | PCI_COMMAND_SERR |
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PCI_COMMAND_WAIT | PCI_COMMAND_PARITY;
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pci_write_config_word((struct pci_dev*)dev, PCI_COMMAND, cmd);
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pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE, dev->irq);
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return irq;
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}
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int
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init_rt2880pci(void)
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{
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unsigned long val = 0;
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int i;
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writel(0, RT2880_PCI_PCICFG_ADDR);
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for(i = 0; i < 0xfffff; i++) {}
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writel(0x79, RT2880_PCI_ARBCTL);
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writel(0x07FF0001, RT2880_PCI_BAR0SETUP_ADDR);
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writel(RT2880_PCI_SLOT1_BASE, RT2880_PCI_MEMBASE);
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writel(0x00460000, RT2880_PCI_IOBASE);
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writel(0x08000000, RT2880_PCI_IMBASEBAR0_ADDR);
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writel(0x08021814, RT2880_PCI_ID);
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writel(0x00800001, RT2880_PCI_CLASS);
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writel(0x28801814, RT2880_PCI_SUBID);
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writel(0x000c0000, RT2880_PCI_PCIMSK_ADDR);
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write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000);
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read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val);
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register_pci_controller(&rt2880_controller);
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return 0;
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}
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int
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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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struct pci_fixup pcibios_fixups[] = {
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{0}
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};
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arch_initcall(init_rt2880pci);
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#endif
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