From a70ef0c33764bc8cfc9f27403419a01a9dcebb78 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Sun, 4 Oct 2009 19:53:17 +0000
Subject: [PATCH] adds pci support for rt288x
SVN-Revision: 17855
---
.../mips/include/asm/mach-ralink/rt288x_pci.h | 19 +++
.../ramips/files/arch/mips/pci/ops-rt288x.c | 70 +++++++++
.../ramips/files/arch/mips/pci/pci-rt288x.c | 134 ++++++++++++++++++
target/linux/ramips/rt288x/config-2.6.30 | 2 +
4 files changed, 225 insertions(+)
create mode 100644 target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt288x_pci.h
create mode 100644 target/linux/ramips/files/arch/mips/pci/ops-rt288x.c
create mode 100644 target/linux/ramips/files/arch/mips/pci/pci-rt288x.c
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt288x_pci.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt288x_pci.h
new file mode 100644
index 0000000000..f73d7ac151
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt288x_pci.h
@@ -0,0 +1,19 @@
+
+#ifdef CONFIG_PCI
+
+#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))
+
+#endif
diff --git a/target/linux/ramips/files/arch/mips/pci/ops-rt288x.c b/target/linux/ramips/files/arch/mips/pci/ops-rt288x.c
new file mode 100644
index 0000000000..44dadc9af1
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/pci/ops-rt288x.c
@@ -0,0 +1,70 @@
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <asm/pci.h>
+#include <asm/io.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+#include <asm/mach-rt288x/rt288x.h>
+#include <asm/mach-rt288x/rt288x_pci.h>
+
+#ifdef CONFIG_PCI
+
+#define PCI_ACCESS_READ 0
+#define PCI_ACCESS_WRITE 1
+
+static int config_access(unsigned char access_type, struct pci_bus *bus,
+ unsigned int devfn, unsigned char where, u32 * data)
+{
+ unsigned int slot = PCI_SLOT(devfn);
+ unsigned int address;
+ u8 func = PCI_FUNC(devfn);
+ address = (bus->number << 16) | (slot << 11) | (func << 8) | (where& 0xfc) | 0x80000000;
+ writel(address, RT2880_PCI_CONFIG_ADDR);
+ if (access_type == PCI_ACCESS_WRITE)
+ writel(*data, RT2880_PCI_CONFIG_DATA);
+ else
+ *data = readl(RT2880_PCI_CONFIG_DATA);
+ return 0;
+}
+
+int
+pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val)
+{
+ u32 data = 0;
+ if(config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if(size == 1)
+ *val = (data >> ((where & 3) << 3)) & 0xff;
+ else if(size == 2)
+ *val = (data >> ((where & 3) << 3)) & 0xffff;
+ else
+ *val = data;
+ return PCIBIOS_SUCCESSFUL;
+}
+
+int
+pci_config_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+{
+ u32 data = 0;
+ if(size == 4)
+ {
+ data = val;
+ } else {
+ if(config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if(size == 1)
+ data = (data & ~(0xff << ((where & 3) << 3))) |
+ (val << ((where & 3) << 3));
+ else if(size == 2)
+ data = (data & ~(0xffff << ((where & 3) << 3))) |
+ (val << ((where & 3) << 3));
+ }
+ if(config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ return PCIBIOS_SUCCESSFUL;
+}
+#endif
diff --git a/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c b/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c
new file mode 100644
index 0000000000..8baefc3f25
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c
@@ -0,0 +1,134 @@
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <asm/pci.h>
+#include <asm/io.h>
+#include <asm/mach-rt288x/rt288x.h>
+#include <asm/mach-rt288x/rt288x_pci.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+
+#ifdef CONFIG_PCI
+
+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);
+
+struct pci_ops rt2880_pci_ops = {
+ .read = pci_config_read,
+ .write = pci_config_write,
+};
+
+static struct resource pci_io_resource = {
+ .name = "pci MEM space",
+ .start = 0x20000000,
+ .end = 0x2FFFFFFF,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource pci_mem_resource = {
+ .name = "pci IO space",
+ .start = 0x00460000,
+ .end = 0x0046FFFF,
+ .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,
+};
+
+void inline
+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);
+}
+
+void inline
+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);
+}
+
+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))
+ {
+ case 0x00:
+ write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000);
+ read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val);
+ break;
+ case 0x11:
+ irq = RT288X_CPU_IRQ_PCI;
+ break;
+ default:
+ 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;
+ pci_write_config_word((struct pci_dev*)dev, PCI_COMMAND, cmd);
+ pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE, dev->irq);
+ return irq;
+}
+
+int
+init_rt2880pci(void)
+{
+ unsigned long val = 0;
+ int i;
+ writel(0, RT2880_PCI_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);
+ 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);
+ return 0;
+}
+
+int
+pcibios_plat_dev_init(struct pci_dev *dev)
+{
+ return 0;
+}
+
+struct pci_fixup pcibios_fixups[] = {
+ {0}
+};
+
+arch_initcall(init_rt2880pci);
+
+#endif
diff --git a/target/linux/ramips/rt288x/config-2.6.30 b/target/linux/ramips/rt288x/config-2.6.30
index db99f52247..eef494787d 100644
--- a/target/linux/ramips/rt288x/config-2.6.30
+++ b/target/linux/ramips/rt288x/config-2.6.30
@@ -108,6 +108,8 @@ CONFIG_MTD_PHYSMAP=y
# CONFIG_NXP_STB220 is not set
# CONFIG_NXP_STB225 is not set
CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_PCI=y
+CONFIG_PCI_DOMAINS=y
# CONFIG_PCSPKR_PLATFORM is not set
CONFIG_PHYLIB=y
# CONFIG_PMC_MSP is not set
--
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