cleanup ifxmips pci code

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11531 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 289 insertions, 0 deletions

diff --git a/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c b/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c
new file mode 100644
index 0000000000..3eb25821dd
--- /dev/null
+++ b/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c
@@ -0,0 +1,119 @@
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <asm/ifxmips/ifxmips.h>
+#include <asm/ifxmips/ifxmips_irq.h>
+#include <asm/addrspace.h>
+#include <linux/vmalloc.h>
+
+#define IFXMIPS_PCI_CFG_BUSNUM_SHF 16
+#define IFXMIPS_PCI_CFG_DEVNUM_SHF 11
+#define IFXMIPS_PCI_CFG_FUNNUM_SHF 8
+
+#define PCI_ACCESS_READ  0
+#define PCI_ACCESS_WRITE 1
+
+extern u32 ifxmips_pci_mapped_cfg;
+
+static int
+ifxmips_pci_config_access(unsigned char access_type,
+		struct pci_bus *bus, unsigned int devfn, unsigned int where, u32 *data)
+{
+	unsigned long cfg_base;
+	unsigned long flags;
+
+	u32 temp;
+
+	/* IFXMips support slot from 0 to 15 */
+	/* dev_fn 0&0x68 (AD29) is ifxmips itself */
+	if ((bus->number != 0) || ((devfn & 0xf8) > 0x78)
+			|| ((devfn & 0xf8) == 0) || ((devfn & 0xf8) == 0x68))
+		return 1;
+
+	local_irq_save(flags);
+
+	cfg_base = ifxmips_pci_mapped_cfg;
+	cfg_base |= (bus->number << IFXMIPS_PCI_CFG_BUSNUM_SHF) | (devfn <<
+			IFXMIPS_PCI_CFG_FUNNUM_SHF) | (where & ~0x3);
+
+	/* Perform access */
+	if (access_type == PCI_ACCESS_WRITE)
+	{
+#ifdef CONFIG_SWAP_IO_SPACE
+		ifxmips_w32(swab32(*data), ((u32*)cfg_base));
+#else
+		ifxmips_w32(*data, ((u32*)cfg_base));
+#endif
+	} else {
+		*data = ifxmips_r32(((u32*)(cfg_base)));
+#ifdef CONFIG_SWAP_IO_SPACE
+		*data = swab32(*data);
+#endif
+	}
+	wmb();
+
+	/* clean possible Master abort */
+	cfg_base = (ifxmips_pci_mapped_cfg | (0x0 << IFXMIPS_PCI_CFG_FUNNUM_SHF)) + 4;
+	temp = ifxmips_r32(((u32*)(cfg_base)));
+#ifdef CONFIG_SWAP_IO_SPACE
+	temp = swab32 (temp);
+#endif
+	cfg_base = (ifxmips_pci_mapped_cfg | (0x68 << IFXMIPS_PCI_CFG_FUNNUM_SHF)) + 4;
+	ifxmips_w32(temp, ((u32*)cfg_base));
+
+	local_irq_restore(flags);
+
+	if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
+		return 1;
+
+	return 0;
+}
+
+int
+ifxmips_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn,
+		int where, int size, u32 * val)
+{
+	u32 data = 0;
+
+	if (ifxmips_pci_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
+ifxmips_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn,
+		int where, int size, u32 val)
+{
+	u32 data = 0;
+
+	if (size == 4)
+	{
+		data = val;
+	} else {
+		if (ifxmips_pci_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 (ifxmips_pci_config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	return PCIBIOS_SUCCESSFUL;
+}
diff --git a/target/linux/ifxmips/files/arch/mips/pci/pci-ifxmips.c b/target/linux/ifxmips/files/arch/mips/pci/pci-ifxmips.c
new file mode 100644
index 0000000000..092a80ec4c
--- /dev/null
+++ b/target/linux/ifxmips/files/arch/mips/pci/pci-ifxmips.c
@@ -0,0 +1,170 @@
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <asm/ifxmips/ifxmips.h>
+#include <asm/ifxmips/ifxmips_irq.h>
+#include <asm/addrspace.h>
+#include <linux/vmalloc.h>
+
+#define IFXMIPS_PCI_MEM_BASE    0x18000000
+#define IFXMIPS_PCI_MEM_SIZE    0x02000000
+#define IFXMIPS_PCI_IO_BASE     0x1AE00000
+#define IFXMIPS_PCI_IO_SIZE     0x00200000
+
+extern int ifxmips_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
+extern int ifxmips_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
+
+struct pci_ops ifxmips_pci_ops = {
+	.read = ifxmips_pci_read_config_dword,
+	.write = ifxmips_pci_write_config_dword
+};
+
+static struct resource pci_io_resource = {
+	.name = "io pci IO space",
+	.start = IFXMIPS_PCI_IO_BASE,
+	.end = IFXMIPS_PCI_IO_BASE + IFXMIPS_PCI_IO_SIZE - 1,
+	.flags = IORESOURCE_IO
+};
+
+static struct resource pci_mem_resource = {
+	.name = "ext pci memory space",
+	.start = IFXMIPS_PCI_MEM_BASE,
+	.end = IFXMIPS_PCI_MEM_BASE + IFXMIPS_PCI_MEM_SIZE - 1,
+	.flags = IORESOURCE_MEM
+};
+
+static struct pci_controller ifxmips_pci_controller = {
+	.pci_ops = &ifxmips_pci_ops,
+	.mem_resource = &pci_mem_resource,
+	.mem_offset	= 0x00000000UL,
+	.io_resource = &pci_io_resource,
+	.io_offset	= 0x00000000UL,
+};
+
+u32 ifxmips_pci_mapped_cfg;
+
+int pcibios_plat_dev_init(struct pci_dev *dev){
+	u8 pin;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	switch(pin) {
+		case 0:
+			break;
+		case 1:
+			//falling edge level triggered:0x4, low level:0xc, rising edge:0x2
+			ifxmips_w32(ifxmips_r32(IFXMIPS_EBU_PCC_CON) | 0xc, IFXMIPS_EBU_PCC_CON);
+			ifxmips_w32(ifxmips_r32(IFXMIPS_EBU_PCC_IEN) | 0x10, IFXMIPS_EBU_PCC_IEN);
+			break;
+		case 2:
+		case 3:
+		case 4:
+			printk ("WARNING: interrupt pin %d not supported yet!\n", pin);
+		default:
+			printk ("WARNING: invalid interrupt pin %d\n", pin);
+			return 1;
+	}
+	return 0;
+}
+
+static void __init ifxmips_pci_startup (void){
+	u32 temp_buffer;
+	ifxmips_w32(ifxmips_r32(IFXMIPS_CGU_IFCCR) & ~0xf00000, IFXMIPS_CGU_IFCCR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_CGU_IFCCR) | 0x800000, IFXMIPS_CGU_IFCCR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_CGU_IFCCR) | (1 << 16), IFXMIPS_CGU_IFCCR);
+	ifxmips_w32((1 << 31) | (1 << 30), IFXMIPS_CGU_PCICR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_OUT) | (1 << 5), IFXMIPS_GPIO_P1_OUT);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_OD) | (1 << 5), IFXMIPS_GPIO_P1_OD);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_DIR) | (1 << 5), IFXMIPS_GPIO_P1_DIR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_ALTSEL1) & ~(1 << 5), IFXMIPS_GPIO_P1_ALTSEL1);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_ALTSEL0) & ~(1 << 5), IFXMIPS_GPIO_P1_ALTSEL0);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_DIR) & ~0x2000, IFXMIPS_GPIO_P1_DIR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_DIR) | 0x4000, IFXMIPS_GPIO_P1_DIR);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_ALTSEL1) & ~0x6000, IFXMIPS_GPIO_P1_ALTSEL1);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_ALTSEL0) | 0x6000, IFXMIPS_GPIO_P1_ALTSEL0);
+	/* enable auto-switching between PCI and EBU */
+	ifxmips_w32(0xa, PCI_CR_CLK_CTRL);
+	/* busy, i.e. configuration is not done, PCI access has to be retried */
+	ifxmips_w32(ifxmips_r32(PCI_CR_PCI_MOD) & ~(1 << 24), PCI_CR_PCI_MOD);
+	wmb ();
+	/* BUS Master/IO/MEM access */
+	ifxmips_w32(ifxmips_r32(PCI_CS_STS_CMD) | 7, PCI_CS_STS_CMD);
+
+	/* enable external 2 PCI masters */
+	temp_buffer = ifxmips_r32(PCI_CR_PC_ARB);
+	temp_buffer &= (~(0xf << 16));
+	/* enable internal arbiter */
+	temp_buffer |= (1 << INTERNAL_ARB_ENABLE_BIT);
+	/* enable internal PCI master reqest */
+	temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS));
+
+	/* enable EBU reqest */
+	temp_buffer &= (~(3 << PCI_MASTER1_REQ_MASK_2BITS));
+
+	/* enable all external masters request */
+	temp_buffer &= (~(3 << PCI_MASTER2_REQ_MASK_2BITS));
+	ifxmips_w32(temp_buffer, PCI_CR_PC_ARB);
+	wmb ();
+
+	ifxmips_w32(0x18000000, PCI_CR_FCI_ADDR_MAP0);
+	ifxmips_w32(0x18400000, PCI_CR_FCI_ADDR_MAP1);
+	ifxmips_w32(0x18800000, PCI_CR_FCI_ADDR_MAP2);
+	ifxmips_w32(0x18c00000, PCI_CR_FCI_ADDR_MAP3);
+	ifxmips_w32(0x19000000, PCI_CR_FCI_ADDR_MAP4);
+	ifxmips_w32(0x19400000, PCI_CR_FCI_ADDR_MAP5);
+	ifxmips_w32(0x19800000, PCI_CR_FCI_ADDR_MAP6);
+	ifxmips_w32(0x19c00000, PCI_CR_FCI_ADDR_MAP7);
+	ifxmips_w32(0x1ae00000, PCI_CR_FCI_ADDR_MAP11hg);
+	ifxmips_w32(0x0e000008, PCI_CR_BAR11MASK);
+	ifxmips_w32(0, PCI_CR_PCI_ADDR_MAP11);
+	ifxmips_w32(0, PCI_CS_BASE_ADDR1);
+#ifdef CONFIG_SWAP_IO_SPACE
+	/* both TX and RX endian swap are enabled */
+	ifxmips_w32(ifxmips_r32(PCI_CR_PCI_EOI) | 3, PCI_CR_PCI_EOI);
+	wmb ();
+#endif
+	/*TODO: disable BAR2 & BAR3 - why was this in the origianl infineon code */
+	ifxmips_w32(ifxmips_r32(PCI_CR_BAR12MASK) | 0x80000000, PCI_CR_BAR12MASK);
+	ifxmips_w32(ifxmips_r32(PCI_CR_BAR13MASK) | 0x80000000, PCI_CR_BAR13MASK);
+	/*use 8 dw burst length */
+	ifxmips_w32(0x303, PCI_CR_FCI_BURST_LENGTH);
+	ifxmips_w32(ifxmips_r32(PCI_CR_PCI_MOD) | (1 << 24), PCI_CR_PCI_MOD);
+	wmb();
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_OUT) & ~(1 << 5), IFXMIPS_GPIO_P1_OUT);
+	wmb();
+	mdelay(1);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P1_OUT) | (1 << 5), IFXMIPS_GPIO_P1_OUT);
+}
+
+int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin){
+	switch (slot) {
+		case 13:
+			/* IDSEL = AD29 --> USB Host Controller */
+			return (INT_NUM_IM1_IRL0 + 17);
+		case 14:
+			/* IDSEL = AD30 --> mini PCI connector */
+			return (INT_NUM_IM0_IRL0 + 22);
+		default:
+			printk("Warning: no IRQ found for PCI device in slot %d, pin %d\n", slot, pin);
+			return 0;
+	}
+}
+
+int pcibios_init(void){
+	extern int pci_probe_only;
+
+	pci_probe_only = 0;
+	printk ("PCI: Probing PCI hardware on host bus 0.\n");
+	ifxmips_pci_startup ();
+	//	IFXMIPS_PCI_REG32(PCI_CR_CLK_CTRL_REG) &= (~8);
+	ifxmips_pci_mapped_cfg = (u32)ioremap_nocache(0x17000000, 0x800 * 16);
+	printk("IFXMips PCI mapped to 0x%08lX\n", (unsigned long)ifxmips_pci_mapped_cfg);
+	ifxmips_pci_controller.io_map_base = (unsigned long)ioremap(IFXMIPS_PCI_IO_BASE, IFXMIPS_PCI_IO_SIZE - 1);
+	printk("IFXMips PCI I/O mapped to 0x%08lX\n", (unsigned long)ifxmips_pci_controller.io_map_base);
+	register_pci_controller(&ifxmips_pci_controller);
+	return 0;
+}
+
+arch_initcall(pcibios_init);