+/*
+ * Ralink RT288x SoC PCI register definitions
+ *
+ * Copyright (C) 2009 John Crispin <blogic@openwrt.org>
+ * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/init.h>
#include <asm/mach-ralink/rt288x.h>
-#include <asm/mach-ralink/rt288x_pci.h>
+#include <asm/mach-ralink/rt288x_regs.h>
+
+#define RT2880_PCI_MEM_BASE 0x20000000
+#define RT2880_PCI_MEM_SIZE 0x10000000
+#define RT2880_PCI_IO_BASE 0x00460000
+#define RT2880_PCI_IO_SIZE 0x00010000
+
+#define RT2880_PCI_REG_PCICFG_ADDR 0x00
+#define RT2880_PCI_REG_PCIMSK_ADDR 0x0c
+#define RT2880_PCI_REG_BAR0SETUP_ADDR 0x10
+#define RT2880_PCI_REG_IMBASEBAR0_ADDR 0x18
+#define RT2880_PCI_REG_CONFIG_ADDR 0x20
+#define RT2880_PCI_REG_CONFIG_DATA 0x24
+#define RT2880_PCI_REG_MEMBASE 0x28
+#define RT2880_PCI_REG_IOBASE 0x2c
+#define RT2880_PCI_REG_ID 0x30
+#define RT2880_PCI_REG_CLASS 0x34
+#define RT2880_PCI_REG_SUBID 0x38
+#define RT2880_PCI_REG_ARBCTL 0x80
+
+#define PCI_ACCESS_READ 0
+#define PCI_ACCESS_WRITE 1
+
+static void __iomem *rt2880_pci_base;
+static DEFINE_SPINLOCK(rt2880_pci_lock);
+
+static u32 rt2880_pci_reg_read(u32 reg)
+{
+ return readl(rt2880_pci_base + reg);
+}
+
+static void rt2880_pci_reg_write(u32 val, u32 reg)
+{
+ writel(val, rt2880_pci_base + reg);
+}
-#ifdef CONFIG_PCI
+static inline u32 rt2880_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
+ unsigned int func, unsigned int where)
+{
+ return ((bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) |
+ 0x80000000);
+}
+
+static void config_access(unsigned char access_type, struct pci_bus *bus,
+ unsigned int devfn, unsigned char where, u32 *data)
+{
+ unsigned int address;
+
+ address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), where);
-extern int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
-extern int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
+ rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
+ if (access_type == PCI_ACCESS_WRITE)
+ rt2880_pci_reg_write(*data, RT2880_PCI_REG_CONFIG_DATA);
+ else
+ *data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
+}
-struct pci_ops rt2880_pci_ops = {
- .read = pci_config_read,
- .write = pci_config_write,
+static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ unsigned long flags;
+ u32 data = 0;
+
+ spin_lock_irqsave(&rt2880_pci_lock, flags);
+ config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
+ spin_unlock_irqrestore(&rt2880_pci_lock, flags);
+
+ switch (size) {
+ case 1:
+ *val = (data >> ((where & 3) << 3)) & 0xff;
+ break;
+ case 2:
+ *val = (data >> ((where & 3) << 3)) & 0xffff;
+ break;
+ case 4:
+ *val = data;
+ break;
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+{
+ unsigned long flags;
+ u32 data = 0;
+
+ spin_lock_irqsave(&rt2880_pci_lock, flags);
+
+ switch (size) {
+ case 1:
+ config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
+ data = (data & ~(0xff << ((where & 3) << 3))) |
+ (val << ((where & 3) << 3));
+ break;
+ case 2:
+ config_access(PCI_ACCESS_READ, bus, devfn, where, &data);
+ data = (data & ~(0xffff << ((where & 3) << 3))) |
+ (val << ((where & 3) << 3));
+ break;
+ case 4:
+ data = val;
+ break;
+ }
+
+ config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data);
+ spin_unlock_irqrestore(&rt2880_pci_lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops rt2880_pci_ops = {
+ .read = rt2880_pci_config_read,
+ .write = rt2880_pci_config_write,
};
-static struct resource pci_io_resource = {
- .name = "pci MEM space",
- .start = 0x20000000,
- .end = 0x2FFFFFFF,
- .flags = IORESOURCE_MEM,
+static struct resource rt2880_pci_io_resource = {
+ .name = "PCI MEM space",
+ .start = RT2880_PCI_MEM_BASE,
+ .end = RT2880_PCI_MEM_BASE + RT2880_PCI_MEM_SIZE - 1,
+ .flags = IORESOURCE_MEM,
};
-static struct resource pci_mem_resource = {
- .name = "pci IO space",
- .start = 0x00460000,
- .end = 0x0046FFFF,
- .flags = IORESOURCE_IO,
+static struct resource rt2880_pci_mem_resource = {
+ .name = "PCI IO space",
+ .start = RT2880_PCI_IO_BASE,
+ .end = RT2880_PCI_IO_BASE + RT2880_PCI_IO_SIZE - 1,
+ .flags = IORESOURCE_IO,
};
-struct pci_controller rt2880_controller = {
- .pci_ops = &rt2880_pci_ops,
- .mem_resource = &pci_io_resource,
- .io_resource = &pci_mem_resource,
- .mem_offset = 0x00000000UL,
- .io_offset = 0x00000000UL,
+static struct pci_controller rt2880_pci_controller = {
+ .pci_ops = &rt2880_pci_ops,
+ .mem_resource = &rt2880_pci_io_resource,
+ .io_resource = &rt2880_pci_mem_resource,
};
-void inline
-read_config(unsigned long bus, unsigned long dev, unsigned long func,
- unsigned long reg, unsigned long *val)
+static inline void read_config(unsigned long bus, unsigned long dev,
+ unsigned long func, unsigned long reg,
+ unsigned long *val)
{
- unsigned long address =
- (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000;
- writel(address, RT2880_PCI_CONFIG_ADDR);
- *val = readl(RT2880_PCI_CONFIG_DATA);
+ unsigned long address;
+ unsigned long flags;
+
+ address = rt2880_pci_get_cfgaddr(bus, dev, func, reg);
+
+ spin_lock_irqsave(&rt2880_pci_lock, flags);
+ rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
+ *val = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
+ spin_unlock_irqrestore(&rt2880_pci_lock, flags);
}
-void inline
-write_config(unsigned long bus, unsigned long dev, unsigned long func,
- unsigned long reg, unsigned long val)
+static inline void write_config(unsigned long bus, unsigned long dev,
+ unsigned long func, unsigned long reg,
+ unsigned long val)
{
- unsigned long address =
- (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000;
- writel(address, RT2880_PCI_CONFIG_ADDR);
- writel(val, RT2880_PCI_CONFIG_DATA);
+ unsigned long address;
+ unsigned long flags;
+
+ address = rt2880_pci_get_cfgaddr(bus, dev, func, reg);
+
+ spin_lock_irqsave(&rt2880_pci_lock, flags);
+ rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
+ rt2880_pci_reg_write(val, RT2880_PCI_REG_CONFIG_DATA);
+ spin_unlock_irqrestore(&rt2880_pci_lock, flags);
}
-int __init
-pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
u16 cmd;
unsigned long val;
int irq = -1;
+
if (dev->bus->number != 0)
return 0;
- switch(PCI_SLOT(dev->devfn))
- {
+ switch (PCI_SLOT(dev->devfn)) {
case 0x00:
write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000);
read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val);
irq = RT288X_CPU_IRQ_PCI;
break;
default:
- printk("%s:%s[%d] trying to alloc unknown pci irq\n", __FILE__, __func__, __LINE__);
+ printk("%s:%s[%d] trying to alloc unknown pci irq\n",
+ __FILE__, __func__, __LINE__);
BUG();
break;
}
pci_write_config_byte((struct pci_dev*)dev, PCI_CACHE_LINE_SIZE, 0x14);
pci_write_config_byte((struct pci_dev*)dev, PCI_LATENCY_TIMER, 0xFF);
pci_read_config_word((struct pci_dev*)dev, PCI_COMMAND, &cmd);
- cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
- PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK | PCI_COMMAND_SERR |
- PCI_COMMAND_WAIT | PCI_COMMAND_PARITY;
+ cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+ PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK |
+ PCI_COMMAND_SERR | PCI_COMMAND_WAIT | PCI_COMMAND_PARITY;
pci_write_config_word((struct pci_dev*)dev, PCI_COMMAND, cmd);
- pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE, dev->irq);
+ pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE,
+ dev->irq);
return irq;
}
-int
-init_rt2880pci(void)
+static int __init rt2880_pci_init(void)
{
unsigned long val = 0;
int i;
- writel(0, RT2880_PCI_PCICFG_ADDR);
+
+ rt2880_pci_base = ioremap_nocache(RT2880_PCI_BASE, PAGE_SIZE);
+
+ rt2880_pci_reg_write(0, RT2880_PCI_REG_PCICFG_ADDR);
for(i = 0; i < 0xfffff; i++) {}
- writel(0x79, RT2880_PCI_ARBCTL);
- writel(0x07FF0001, RT2880_PCI_BAR0SETUP_ADDR);
- writel(RT2880_PCI_SLOT1_BASE, RT2880_PCI_MEMBASE);
- writel(0x00460000, RT2880_PCI_IOBASE);
- writel(0x08000000, RT2880_PCI_IMBASEBAR0_ADDR);
- writel(0x08021814, RT2880_PCI_ID);
- writel(0x00800001, RT2880_PCI_CLASS);
- writel(0x28801814, RT2880_PCI_SUBID);
- writel(0x000c0000, RT2880_PCI_PCIMSK_ADDR);
+
+ rt2880_pci_reg_write(0x79, RT2880_PCI_REG_ARBCTL);
+ rt2880_pci_reg_write(0x07FF0001, RT2880_PCI_REG_BAR0SETUP_ADDR);
+ rt2880_pci_reg_write(RT2880_PCI_MEM_BASE, RT2880_PCI_REG_MEMBASE);
+ rt2880_pci_reg_write(RT2880_PCI_IO_BASE, RT2880_PCI_REG_IOBASE);
+ rt2880_pci_reg_write(0x08000000, RT2880_PCI_REG_IMBASEBAR0_ADDR);
+ rt2880_pci_reg_write(0x08021814, RT2880_PCI_REG_ID);
+ rt2880_pci_reg_write(0x00800001, RT2880_PCI_REG_CLASS);
+ rt2880_pci_reg_write(0x28801814, RT2880_PCI_REG_SUBID);
+ rt2880_pci_reg_write(0x000c0000, RT2880_PCI_REG_PCIMSK_ADDR);
write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000);
read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val);
- register_pci_controller(&rt2880_controller);
+
+ register_pci_controller(&rt2880_pci_controller);
return 0;
}
-int
-pcibios_plat_dev_init(struct pci_dev *dev)
+int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
-struct pci_fixup pcibios_fixups[] = {
- {0}
-};
-
-arch_initcall(init_rt2880pci);
-
-#endif
+arch_initcall(rt2880_pci_init);
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