247 lines
6.9 KiB
C
247 lines
6.9 KiB
C
/*
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* Ralink RT288x SoC PCI register definitions
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*
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* Copyright (C) 2009 John Crispin <blogic@openwrt.org>
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* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
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*
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* Parts of this file are based on Ralink's 2.6.21 BSP
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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 version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/io.h>
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#include <linux/init.h>
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#include <asm/mach-ralink/rt288x.h>
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#include <asm/mach-ralink/rt288x_regs.h>
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#define RT2880_PCI_MEM_BASE 0x20000000
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#define RT2880_PCI_MEM_SIZE 0x10000000
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#define RT2880_PCI_IO_BASE 0x00460000
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#define RT2880_PCI_IO_SIZE 0x00010000
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#define RT2880_PCI_REG_PCICFG_ADDR 0x00
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#define RT2880_PCI_REG_PCIMSK_ADDR 0x0c
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#define RT2880_PCI_REG_BAR0SETUP_ADDR 0x10
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#define RT2880_PCI_REG_IMBASEBAR0_ADDR 0x18
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#define RT2880_PCI_REG_CONFIG_ADDR 0x20
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#define RT2880_PCI_REG_CONFIG_DATA 0x24
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#define RT2880_PCI_REG_MEMBASE 0x28
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#define RT2880_PCI_REG_IOBASE 0x2c
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#define RT2880_PCI_REG_ID 0x30
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#define RT2880_PCI_REG_CLASS 0x34
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#define RT2880_PCI_REG_SUBID 0x38
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#define RT2880_PCI_REG_ARBCTL 0x80
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#define PCI_ACCESS_READ 0
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#define PCI_ACCESS_WRITE 1
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static void __iomem *rt2880_pci_base;
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static DEFINE_SPINLOCK(rt2880_pci_lock);
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static u32 rt2880_pci_reg_read(u32 reg)
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{
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return readl(rt2880_pci_base + reg);
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}
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static void rt2880_pci_reg_write(u32 val, u32 reg)
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{
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writel(val, rt2880_pci_base + reg);
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}
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static void config_access(unsigned char access_type, struct pci_bus *bus,
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unsigned int devfn, unsigned char where, u32 *data)
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{
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unsigned int slot = PCI_SLOT(devfn);
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unsigned int address;
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u8 func = PCI_FUNC(devfn);
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address = (bus->number << 16) | (slot << 11) | (func << 8) |
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(where & 0xfc) | 0x80000000;
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rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
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if (access_type == PCI_ACCESS_WRITE)
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rt2880_pci_reg_write(*data, RT2880_PCI_REG_CONFIG_DATA);
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else
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*data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
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}
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static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 *val)
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{
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unsigned long flags;
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u32 data = 0;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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if (size == 1)
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*val = (data >> ((where & 3) << 3)) & 0xff;
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else if (size == 2)
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*val = (data >> ((where & 3) << 3)) & 0xffff;
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else
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*val = data;
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return PCIBIOS_SUCCESSFUL;
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}
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static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 val)
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{
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unsigned long flags;
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u32 data = 0;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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if (size == 4) {
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data = val;
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} else {
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config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
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if (size == 1)
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data = (data & ~(0xff << ((where & 3) << 3))) |
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(val << ((where & 3) << 3));
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else if (size == 2)
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data = (data & ~(0xffff << ((where & 3) << 3))) |
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(val << ((where & 3) << 3));
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}
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config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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return PCIBIOS_SUCCESSFUL;
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}
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static struct pci_ops rt2880_pci_ops = {
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.read = rt2880_pci_config_read,
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.write = rt2880_pci_config_write,
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};
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static struct resource rt2880_pci_io_resource = {
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.name = "PCI MEM space",
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.start = RT2880_PCI_MEM_BASE,
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.end = RT2880_PCI_MEM_BASE + RT2880_PCI_MEM_SIZE - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct resource rt2880_pci_mem_resource = {
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.name = "PCI IO space",
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.start = RT2880_PCI_IO_BASE,
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.end = RT2880_PCI_IO_BASE + RT2880_PCI_IO_SIZE - 1,
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.flags = IORESOURCE_IO,
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};
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static struct pci_controller rt2880_pci_controller = {
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.pci_ops = &rt2880_pci_ops,
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.mem_resource = &rt2880_pci_io_resource,
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.io_resource = &rt2880_pci_mem_resource,
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};
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static inline void read_config(unsigned long bus, unsigned long dev,
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unsigned long func, unsigned long reg,
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unsigned long *val)
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{
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unsigned long address;
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unsigned long flags;
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address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
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0x80000000;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
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*val = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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}
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static inline void write_config(unsigned long bus, unsigned long dev,
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unsigned long func, unsigned long reg,
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unsigned long val)
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{
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unsigned long address;
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unsigned long flags;
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address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
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0x80000000;
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spin_lock_irqsave(&rt2880_pci_lock, flags);
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rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
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rt2880_pci_reg_write(val, RT2880_PCI_REG_CONFIG_DATA);
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spin_unlock_irqrestore(&rt2880_pci_lock, flags);
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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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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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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",
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__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 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
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PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK |
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PCI_COMMAND_SERR | 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,
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dev->irq);
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return irq;
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}
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static int __init rt2880_pci_init(void)
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{
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unsigned long val = 0;
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int i;
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rt2880_pci_base = ioremap_nocache(RT2880_PCI_BASE, PAGE_SIZE);
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rt2880_pci_reg_write(0, RT2880_PCI_REG_PCICFG_ADDR);
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for(i = 0; i < 0xfffff; i++) {}
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rt2880_pci_reg_write(0x79, RT2880_PCI_REG_ARBCTL);
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rt2880_pci_reg_write(0x07FF0001, RT2880_PCI_REG_BAR0SETUP_ADDR);
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rt2880_pci_reg_write(RT2880_PCI_MEM_BASE, RT2880_PCI_REG_MEMBASE);
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rt2880_pci_reg_write(RT2880_PCI_IO_BASE, RT2880_PCI_REG_IOBASE);
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rt2880_pci_reg_write(0x08000000, RT2880_PCI_REG_IMBASEBAR0_ADDR);
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rt2880_pci_reg_write(0x08021814, RT2880_PCI_REG_ID);
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rt2880_pci_reg_write(0x00800001, RT2880_PCI_REG_CLASS);
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rt2880_pci_reg_write(0x28801814, RT2880_PCI_REG_SUBID);
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rt2880_pci_reg_write(0x000c0000, RT2880_PCI_REG_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_pci_controller);
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return 0;
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}
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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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struct pci_fixup pcibios_fixups[] = {
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{0}
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};
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arch_initcall(rt2880_pci_init);
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