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ramips: add register access functions into the rt288x pci code

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SVN-Revision: 17918
master
Gabor Juhos 15 years ago
parent 0f51ed2723
commit 5b07caf121
1 changed files with 45 additions and 30 deletions
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  1. 75
      target/linux/ramips/files/arch/mips/pci/pci-rt288x.c

75
target/linux/ramips/files/arch/mips/pci/pci-rt288x.c
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@ -4,25 +4,38 @@
#include <linux/init.h>
#include <asm/mach-ralink/rt288x.h>
#include <asm/mach-ralink/rt288x_regs.h>
#define RT2880_PCI_SLOT1_BASE 0x20000000
#define RALINK_PCI_BASE 0xA0440000
#define RT2880_PCI_PCICFG_ADDR ((unsigned long*)(RALINK_PCI_BASE + 0x0000))
#define RT2880_PCI_ARBCTL ((unsigned long*)(RALINK_PCI_BASE + 0x0080))
#define RT2880_PCI_BAR0SETUP_ADDR ((unsigned long*)(RALINK_PCI_BASE + 0x0010))
#define RT2880_PCI_CONFIG_ADDR ((unsigned long*)(RALINK_PCI_BASE + 0x0020))
#define RT2880_PCI_CONFIG_DATA ((unsigned long*)(RALINK_PCI_BASE + 0x0024))
#define RT2880_PCI_MEMBASE ((unsigned long*)(RALINK_PCI_BASE + 0x0028))
#define RT2880_PCI_IOBASE ((unsigned long*)(RALINK_PCI_BASE + 0x002C))
#define RT2880_PCI_IMBASEBAR0_ADDR ((unsigned long*)(RALINK_PCI_BASE + 0x0018))
#define RT2880_PCI_ID ((unsigned long*)(RALINK_PCI_BASE + 0x0030))
#define RT2880_PCI_CLASS ((unsigned long*)(RALINK_PCI_BASE + 0x0034))
#define RT2880_PCI_SUBID ((unsigned long*)(RALINK_PCI_BASE + 0x0038))
#define RT2880_PCI_PCIMSK_ADDR ((unsigned long*)(RALINK_PCI_BASE + 0x000C))
#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
void __iomem *rt2880_pci_base;
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);
}
static int config_access(unsigned char access_type, struct pci_bus *bus,
unsigned int devfn, unsigned char where, u32 *data)
{
@ -33,11 +46,11 @@ static int config_access(unsigned char access_type, struct pci_bus *bus,
address = (bus->number << 16) | (slot << 11) | (func << 8) |
(where & 0xfc) | 0x80000000;
writel(address, RT2880_PCI_CONFIG_ADDR);
rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
if (access_type == PCI_ACCESS_WRITE)
writel(*data, RT2880_PCI_CONFIG_DATA);
rt2880_pci_reg_write(*data, RT2880_PCI_REG_CONFIG_DATA);
else
*data = readl(RT2880_PCI_CONFIG_DATA);
*data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
return 0;
}
@ -117,8 +130,8 @@ void inline read_config(unsigned long bus, unsigned long dev,
address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
0x80000000;
writel(address, RT2880_PCI_CONFIG_ADDR);
*val = readl(RT2880_PCI_CONFIG_DATA);
rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
*val = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA);
}
void inline write_config(unsigned long bus, unsigned long dev,
@ -129,8 +142,8 @@ void inline write_config(unsigned long bus, unsigned long dev,
address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) |
0x80000000;
writel(address, RT2880_PCI_CONFIG_ADDR);
writel(val, RT2880_PCI_CONFIG_DATA);
rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR);
rt2880_pci_reg_write(val, RT2880_PCI_REG_CONFIG_DATA);
}
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
@ -174,18 +187,20 @@ 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_SLOT1_BASE, RT2880_PCI_REG_MEMBASE);
rt2880_pci_reg_write(0x00460000, 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);

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